WO2014003060A1

WO2014003060A1 - Rotary compressor

Info

Publication number: WO2014003060A1
Application number: PCT/JP2013/067528
Authority: WO
Inventors: 善則村瀬; 章稲垣; 石井　弘樹
Original assignee: 株式会社デンソー
Priority date: 2012-06-26
Filing date: 2013-06-26
Publication date: 2014-01-03
Also published as: US20150176583A1; CN104471250A; DE112013003254T5; JP5901446B2; JP2014005795A

Abstract

A rotary compression mechanism is provided with a rotor (11) which can rotate about the axis (O1) of a shaft (12) mounted to a casing (1), a cylinder (8) which can rotate about a rotation center (O2) eccentric from the shaft (12), and a drive plate (13) which is installed so as to be capable of swinging relative to one of the cylinder (8) and the rotor (11) and to be capable of sliding relative to the other of the cylinder (8) and the rotor (11) and which rotationally connects the cylinder (8) and the rotor (11). Spaces which are separated from each other by both a partition point (C) and the drive plate (13) and which are located between the inner surface of the cylinder (8) and the outer periphery of the rotor (11) are operating chambers (9, 10) for performing compression or suction.

Description

Rotary compressor

The present invention relates to a rotary compressor, and is particularly efficient and reliable in compressing a refrigerant such as an air conditioner, and can be miniaturized by combining these.

Compressor needs to be downsized from the viewpoint of low cost and mountability to vehicles. Arranging the compression section inside the driving motor as a means for miniaturization is a useful means for miniaturization. Patent Document 1 discloses a configuration in which a compression unit is arranged inside such a motor. In this prior art, the elliptic cylinder 8 integral with the rotor of the motor is configured to rotate with respect to the piston 17 in a stationary state, as opposed to a normal rolling piston. This is basically a normal rolling piston, so there is a vane nose. And since the spring and vane are arranged in the rotating cylinder part, centrifugal force acts at the time of high rotation, and when the spring force is overcome, a gap (detachment of the vane) occurs between the vane nose and the rotor. Since the compression operation is not performed, the performance degradation becomes a problem and it is not suitable for high rotation. Further, when the spring force is increased so as to overcome the centrifugal force, the pressing force between the vane nose and the rotor slides in an excessively large state, and there is a problem in reliability such that the vane nose portion is seized.

On the other hand, in Patent Document 2, a compression chamber is formed by a vane portion 13 (partition plate) between a cylinder 8 integrated with a rotor of an electric motor and a stationary piston 11 installed at an eccentric position. Have been disclosed. Since this prior art is basically a normal rolling piston, the above-mentioned problem has occurred.

Japanese Examined Patent Publication No. 53-033682 Japanese Patent Publication No. 01-05560

In view of the above problems, the present invention provides a rotary compressor that is highly efficient and reliable, and that can achieve both reductions in size.

In order to solve the above-mentioned problems, the invention of claim 1 is directed to a rotor (11) rotatable around an axis (O1) of a shaft (12) mounted on a casing (1), and the shaft (12). Is swingable with respect to one of the cylinder (8) and the cylinder (8) or the rotor (11), which is rotatable at an eccentric rotation center (O2), and is slid with respect to the other. A rotary compression mechanism that is movably installed and includes a drive plate (13) that rotationally connects the cylinder (8) and the rotor (11), the inner surface of the cylinder (8) and the rotor (11). ) The rotation center (O2) of the cylinder (8) is decentered with respect to the axis (O1) of the shaft (12) so that the outer periphery is in contact with the partition point (C), and the partition point (C) and the Partitioned by drive plate (13) Space between the rotor (11) periphery and the cylinder (8) inner surface, a rotary type compression mechanism is a working chamber (9, 10) for compressing or inhalation.

In addition, the code | symbol attached | subjected above is an example which shows a corresponding relationship with the specific embodiment as described in embodiment mentioned later.

It is sectional drawing which shows 1st Embodiment of this invention. It is a detailed fragmentary sectional view which shows 1st Embodiment of this invention. It is explanatory drawing which shows the action | operation of 1st Embodiment of this invention. It is sectional drawing which shows 1st Embodiment of this invention. It is sectional drawing which shows 2nd Embodiment of this invention. It is sectional drawing which shows 3rd Embodiment of this invention. It is sectional drawing which shows 4th Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. About each embodiment, the same code | symbol is attached | subjected to the part of the same structure, and the description is abbreviate | omitted. In the following description of the embodiment, refrigerant compression of a vehicle air conditioner will be described as an example. However, the present invention is not necessarily limited to this, and the present invention is widely applicable to household and industrial compressors. It is.

(First embodiment)
As shown in FIGS. 1 and 2, the stator 2 of the electric motor is fitted and fixed to the inner surface of the casing 1. The lid 1 is attached to the casing 1 with fastening bolts or the like. Since the rotor 3 of the electric motor is fixed to the outer periphery of the drive cylinder 8 (cylinder 8), the drive cylinder 8 is rotated around the shaft 12 by the rotor 3 of the electric motor. The drive cylinder 8 has

side plates

27 and 27 attached to both sides of the cylindrical cylinder with fastening bolts 41 and the like, and the cylindrical cylinder and the side plate constitute the drive cylinder 8. The shaft 12 is press-fitted into the casing 1 at the right end of FIG. The left end portion of the shaft 12 is inserted or press-fitted into the lid 4 so that the shaft 12 does not rotate.

The motor rotor 3 and the drive cylinder 8 are integrated with the stationary shaft 12 and are rotatable with respect to the eccentric portion 12 ′ of the shaft 12 via a bearing 42. As shown in FIG. 2, the rotor 11 as a compressor is rotated around the drive cylinder 8 by a drive plate 13. Here, the axis O1 of the shaft 12 is eccentric with respect to the rotation center O2 of the rotor 3 of the electric motor. The rotation center O2 and the axis O1 are fixed points. The rotor 11 is rotatably fitted to the shaft 12. The rotor 11 is rotatable around a stationary axis O <b> 1 and is rotated around the drive cylinder 8 by the drive plate 13. In addition, although the electric motor is used as a drive motor of this embodiment, it is also possible to apply in the case of belt transmission.

One end of the drive plate 13 is installed so as to be swingable with respect to the drive cylinder 8, and the other end of the drive plate 13 is inserted into the sliding groove 24 of the rotor 11. 13 is transmitted to the rotor 11, and the rotor 11 rotates. The drive cylinder 8 and the rotor 11 are always in contact at a partition point (contact point) C during rotation. One end of the drive plate 13 may be installed so as to be swingable with respect to the rotor 11, and the other end of the drive plate 13 may be inserted into the sliding groove 24 of the drive cylinder 8.

As shown in FIGS. 1 and 2, a compression medium such as a refrigerant gas to be compressed is introduced from the suction port 16, passed through the suction passage 17, and from the shaft opening 18 and the rotor passage 20 to the suction side working chamber (suction chamber). ) 10. The shaft opening 18 and the rotor passage 20 always communicate with each other at all angles. A groove 19 is formed at the outlet of the shaft opening 18 over the entire circumference in the circumferential direction of a part of the shaft 12.

The side plate 27 fixed to one side of the drive cylinder 8 is provided with a compression chamber discharge port 21, and a reed valve 22 (discharge valve portion) is provided outside. Other valves (such as a poppet valve) may be used instead of the reed valve. Of course, it may be provided on the outer periphery of the cylindrical cylinder of the drive cylinder 8, but it is necessary to consider the influence of centrifugal force. The compression chamber discharge port 21 and the reed valve 22 discharge the compressed gas into the space inside the casing while rotating as the drive cylinder 8 rotates. Then, it discharges outside from the casing discharge port 23.

Next, the drive plate 13 will be described. The drive plate 13 is a member corresponding to a vane in a conventional rolling piston. That is, in the present embodiment, the drive plate 13 is a member that partitions the compression chamber (compression side working chamber) 9 and the suction chamber 10, and as a connecting member that rotates the rotor 11 with the drive cylinder 8. It has the function of In order to fulfill the function as a connecting member, the head 131 of the drive plate 13 has a cylindrical surface, and the drive plate 13 is provided with a gap 132 in the drive cylinder 8 with respect to the central axis of the head 131. And can be swung. As the driving cylinder 8 rotates, the driving plate 13 slides in the sliding groove 24 on the rotor 11. Thereby, at the time of accompanying, it can rotate without being restricted by the eccentricity between the rotation center O2 of the drive cylinder 8 and the axis O1 of the rotor 11.

The compression mechanism includes a rotor 11 that is rotatable around an axis O1 of a shaft 12 fixed to the casing 1, a drive cylinder 8 that is rotatable at a rotation center O2 that is eccentric from the shaft 12, and a drive cylinder 8 and a rotor. 11 and a drive plate 13 that connects the two. A space between the rotor 11 and the drive cylinder 8 is a working chamber. This working chamber is divided into two by the drive plate 13 to form a compression chamber 9 and a suction chamber 10. The drive cylinder 8 is rotated by the

electric motors

2 and 3 that rotationally drive the drive cylinder 8, and among the working chambers formed between the drive cylinder 8 and the rotor 11, in the compression chamber 9 in the forward direction of the drive plate 13 in the rotation direction. Compress the intake gas. The working chamber formed between the drive cylinder 8 and the rotor 11 is partitioned by a drive plate 13 and a partition point C that is a contact point between the drive cylinder 8 and the rotor 11. A compression chamber 9 is formed in front of the drive plate 13 in the rotational direction, and a suction chamber 10 is formed in the rear.

Next, the above-described compression step and suction step will be described with reference to FIG. 3 for each rotation angle θ of the drive cylinder (position of the drive plate 13) of 90 °. Here, in order to make it easy to understand, 720 ° will be described. Description will be made in the order from (1) θ = 0 ° to (1) θ = 720 ° in FIG. (1) At θ = 0 °, the inhalation is completed. Since the drive plate 13 and the partition point C coincide with each other, the suction chamber 10 and the compression chamber 9 are combined. As the rotational angle θ of the drive cylinder 8 increases from θ = 0 °, as seen in (2) to (4), the front side in the rotational direction of the drive plate 13 and the partition point C are closed, Compression in the compression chamber 9 proceeds.

(5) When θ = 360 °, the compression chamber 9 disappears, and this time, the suction chamber 10 is formed between the rear side in the rotational direction of the drive plate 13 and the partition point C, and (5) → (1 ), And the compression process and the suction process are repeated. Although the above description has been made at 720 °, the actual compression step and suction step are simultaneously performed in one rotation of 360 °. 3 (1) to (5), in the compression chamber 9 between the front side in the rotational direction of the drive plate 13 and the partition point C, the compression progresses and at the same time the rear in the rotational direction of the drive plate 13 and the partition. It can be seen that inhalation proceeds in the suction chamber 10 between the point C and the point C. In (1) and (5), since the drive plate 13 and the partition point C coincide with each other, the suction chamber 10 and the compression chamber 9 are combined.

As described above, since the compression operation is performed by the rotation of the drive cylinder 8, the drive cylinder 8 is disposed in the rotor 3 of the electric motor, so that the compressor can be downsized. Since the shaft 12 does not rotate, a suction port 16 can be installed in the shaft 12 to suck gas. Further, a compression chamber discharge port 21 and a reed valve 22 are provided on a side plate 27 that is not easily affected by centrifugal force during rotation. In this embodiment, since there is no vane nose sliding portion, there is no separation or seizure of the vane nose sliding portion as in the prior art, and both performance and reliability can be ensured from low rotation to high rotation. It is possible to provide a small compressor built in the motor rotor. Further, in the prior art, it is necessary to eccentrically move the rotor in order to form the compression chamber, and the vibration of the compressor is deteriorated during high-speed rotation. However, in this embodiment, the rotor 11 has a fixed axis O1. Since only the self-rotating motion in the compressor, the deterioration of the compressor vibration can be prevented.

In this embodiment, the head 131 of the drive plate 13 has a cylindrical surface, and the drive plate 13 can swing with respect to the central axis of the head 131. On the other hand, as shown in FIG. 4, a flat drive plate 13 without a head may be used. In this case, two shoes 133 having a cylindrical surface on one side are installed so as to sandwich the end portion of the drive plate 13. The rest of the configuration is the same as in FIGS. The corner portion of the front end surface of the drive plate 13 inserted in the sliding groove 24 formed in the rotor 11 has an R shape (roundness, round-cornered). An R shape is formed at the corner of the opening of the sliding groove 24 formed on the peripheral surface of the rotor 11.
The head 131 of the drive plate 13 can be implemented by being provided on the drive cylinder 8 as shown in FIGS.

(Second and third embodiments)
In the second embodiment of the present invention, as shown in FIG. 5, the shaft 12 (axial center O <b> 1) is mounted so as to rotate with respect to the casing 1, and the cylinder 8 is connected via the drive plate 13 from the rotor 11 side. This is the case when it is rotationally driven. The rotor 3 of the electric motor is connected to the shaft 12, and the rotor 11 and the shaft 12 are integrated in this embodiment. Since the shaft 12 is provided with an eccentric part 12 ′, the cylinder 8 can be rotated by the drive plate 13 around the rotation center O 2 of the eccentric part 12. Others are the same as the first embodiment.

Also in the third embodiment, as shown in FIG. 6, the shaft 12 (axial center O <b> 1) is mounted so as to rotate with respect to the casing 1, and the cylinder 8 is driven to rotate from the rotor 11 side via the drive plate 13. This is the case. In this case, a type in which the stator 2 of the electric motor is inside is used unlike a normal motor. The rotor 3 is integrated with the shaft 12 (axial center O1) together with the rotor 11. Since the shaft 12 is provided with an eccentric part 12 ′, the cylinder 8 can be rotated by the drive plate 13 around the rotation center O <b> 2 of the eccentric part 12. Others are the same as the first embodiment.

(Fourth embodiment)
The fourth embodiment is an embodiment in which the suction and discharge of the first embodiment are reversed. In this case, the suction port 16 is installed at a position indicated by reference numeral 23 in FIG. 1, and the side 21 of the side plate 27 becomes the compression chamber suction port 21 ′ (reed valve is not required). As shown in FIG. 7, the compression chamber 9 is formed in the front of the drive plate 13 in the rotation direction, and the suction chamber 10 is formed in the rear, so that a part of the discharge passage is formed in the front of the drive plate 13 in the rotation direction. A rotor passage 20 is formed, and a compression chamber suction port 21 ′ is provided behind the drive plate 13 in the rotation direction.

Reference numerals

17 and 16 in FIG. 1 constitute a discharge passage, and a discharge valve portion (such as a reed valve) is installed at any position. In this embodiment, since the inside of the casing 1 becomes the suction chamber, the temperature becomes low and the motor efficiency of the electric motor is improved. Other effects are the same as those of the first embodiment.

DESCRIPTION OF SYMBOLS 1 Casing 8 Drive cylinder, cylinder 11 Rotor 12 Shaft 13 Drive plate

Claims

Around the axis (O1) of the shaft (12) mounted on the casing (1), a rotatable rotor (11) and a cylinder (O2) that is rotatable with an eccentric rotation center (O2). 8) and the cylinder (8) or the rotor (11), and is slidable with respect to the other. The cylinder (8) and the rotor ( 11) a rotary compression mechanism comprising a drive plate (13) for rotationally connecting
The rotation center (O2) of the cylinder (8) is set to the axis (O1) of the shaft (12) so that the inner surface of the cylinder (8) and the outer periphery of the rotor (11) are in contact with each other at a partition point (C). Eccentric,
A working chamber (9, 10) in which the space between the inner surface of the cylinder (8) and the outer periphery of the rotor (11), partitioned by the partition point (C) and the drive plate (13), compresses or sucks. Is a rotary compression mechanism.
The rotary compression mechanism according to claim 1, wherein the cylinder (8) is driven to rotate.
The rotary compression mechanism according to claim 2, wherein a rotor (3) of an electric motor is connected to an outer periphery of the cylinder (8).
The rotary compression mechanism according to claim 1, wherein the rotor (11) is rotationally driven.
Side plates (27) constituting the side portions of the cylinder (8) are provided with suction passages (17, 20) provided in the shaft (12) and the rotor (11) to perform suction into the working chamber (10). The compressor according to any one of claims 1 to 4, wherein a discharge valve portion is provided in the discharge valve portion to perform discharge.
A suction port is provided on the outer periphery of the side plate (27) or the cylinder (8), and discharge is performed by providing discharge passages (20, 17) in the rotor (11) and the shaft. The compressor according to any one of claims 1 to 4.
The compressor according to any one of claims 1 to 6, wherein the drive plate (13) has a swinging side formed of a cylindrical surface.
The drive plate (13) is formed of a flat plate, and the swinging side of the drive plate (13) is sandwiched between two shoes (133) each having a cylindrical surface. The compressor according to any one of 6 to 6.