阅读说明：本技术 旋转式压缩机 (Rotary compressor ) 是由 滨田亮 于 2018-01-19 设计创作，主要内容包括：本发明的旋转式压缩机在密闭容器内具备电动机部、和通过从电动机部传递的驱动力来压缩制冷剂的压缩机构部。压缩机构部具有被电动机部驱动而旋转的曲柄轴、具有缸室的缸体、封闭缸室的轴承、与偏心轴部一起进行偏心旋转来压缩制冷剂的旋转活塞、将缸室分隔为吸入室和压缩室的叶片、以及以将叶片的末端部按压于旋转活塞的外周面的方式进行施力的叶片弹簧。在缸体,在叶片槽的周围从叶片弹簧收纳孔朝向缸室形成有使叶片弹簧收纳孔延长的叶片弹簧槽。(The rotary compressor of the present invention includes a motor unit and a compression mechanism unit for compressing a refrigerant by a driving force transmitted from the motor unit in a sealed container. The compression mechanism portion includes a crankshaft that is driven by the motor portion to rotate, a cylinder block having a cylinder chamber, a bearing that closes the cylinder chamber, a rotary piston that eccentrically rotates together with the eccentric shaft portion to compress a refrigerant, a vane that partitions the cylinder chamber into a suction chamber and a compression chamber, and a vane spring that biases a tip end portion of the vane so as to press an outer peripheral surface of the rotary piston. In the cylinder block, a leaf spring groove extending from the leaf spring accommodating hole toward the cylinder chamber is formed around the leaf groove.)

1. A rotary compressor, wherein,

the rotary compressor comprises a motor part and a compression mechanism part for compressing refrigerant by the driving force transmitted from the motor part in a closed container,

the compression mechanism section includes:

a crankshaft having an eccentric shaft portion and driven to rotate by the motor portion;

a cylinder fixed to the hermetic container and having a cylinder chamber;

bearings which are provided on both end surfaces of the cylinder block and close the cylinder chamber;

a rotary piston which is fitted to the eccentric shaft portion, is accommodated in the cylinder chamber, and eccentrically rotates together with the eccentric shaft portion to compress a refrigerant;

a vane provided in a vane groove formed in a radial direction of the cylinder block and dividing the cylinder chamber into a suction chamber and a compression chamber; and

a leaf spring that is housed in a leaf spring housing hole formed in the cylinder and biases a tip end portion of the leaf to be pressed against an outer peripheral surface of the rotary piston,

in the cylinder block, a leaf spring groove that extends the leaf spring housing hole is formed around the leaf groove from the leaf spring housing hole toward the cylinder chamber.

2. The rotary compressor of claim 1,

the leaf spring receiving hole has an inclined portion connecting the side wall of the leaf groove from the side wall of the leaf spring receiving hole,

the vane spring groove is formed from the inclined portion toward the cylinder chamber.

3. A rotary compressor, wherein,

the rotary compressor comprises a motor part and a compression mechanism part for compressing refrigerant by the driving force transmitted from the motor part in a closed container,

the compression mechanism section includes:

a crankshaft having an eccentric shaft portion and driven to rotate by the motor portion;

a cylinder fixed to the hermetic container and having a cylinder chamber;

bearings which are provided on both end surfaces of the cylinder block and close the cylinder chamber;

a rotary piston which is fitted to the eccentric shaft portion, is accommodated in the cylinder chamber, and eccentrically rotates together with the eccentric shaft portion to compress a refrigerant;

a vane provided in a vane groove formed in a radial direction of the cylinder block and dividing the cylinder chamber into a suction chamber and a compression chamber; and

a leaf spring that is housed in a leaf spring groove formed in the cylinder and biases a tip end portion of the leaf to be pressed against an outer peripheral surface of the rotary piston,

the vane spring groove is formed around the vane groove from an outer peripheral surface of the cylinder block toward the cylinder chamber.

4. The rotary compressor according to any one of claims 1 to 3,

the leaf spring is in the form of a spiral,

the leaf spring groove is circular corresponding to the shape of the leaf spring.

Technical Field

The present invention relates to a rotary compressor used for a cooling and heating apparatus such as an air conditioner.

Background

For example, as disclosed in patent document 1, a rotary compressor includes a motor unit and a compression mechanism unit driven by the motor unit in a sealed container. The compression mechanism portion has a vane provided in a vane groove formed in a radial direction of the cylinder block and dividing a cylinder chamber of the cylinder block into a suction chamber and a compression chamber. Further, the compression mechanism includes: a rotary piston accommodated in the cylinder chamber and eccentrically rotating to compress a refrigerant; and a leaf spring that is housed in a leaf spring housing hole formed in the cylinder and biases a tip end portion of the leaf to be pressed against an outer peripheral surface of the rotary piston.

Patent document 1: japanese laid-open patent publication No. 11-022675

In general, in the rotary compressor, it is effective to improve reliability by forming the vane groove long and widening a sliding area between the vane and the vane groove to stabilize a sliding state between the vane and the vane groove. However, in order to urge the vane to follow the rotary piston by the vane spring, it is necessary to secure a sufficient length of the vane spring receiving hole. Therefore, in the rotary compressor, if the vane grooves are lengthened, the sealed container is also enlarged correspondingly, and the whole device is enlarged.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotary compressor capable of increasing a sliding area between a vane and a vane groove without enlarging a sealed container, thereby improving reliability.

A rotary compressor according to the present invention includes, in a sealed container, a motor unit and a compression mechanism unit for compressing a refrigerant by a driving force transmitted from the motor unit, the compression mechanism unit including: a crankshaft having an eccentric shaft portion and driven to rotate by the motor portion; a cylinder fixed to the closed container and having a cylinder chamber; bearings provided on both end surfaces of the cylinder block and closing the cylinder chamber; a rotary piston which is fitted to the eccentric shaft portion, is accommodated in the cylinder chamber, and eccentrically rotates together with the eccentric shaft portion to compress a refrigerant; a vane provided in a vane groove formed in a radial direction of the cylinder block and dividing the cylinder chamber into a suction chamber and a compression chamber; and a leaf spring that is housed in a leaf spring housing hole formed in the cylinder body and that biases a tip end portion of the leaf to be pressed against an outer peripheral surface of the rotary piston, wherein a leaf spring groove that extends the leaf spring housing hole is formed in the cylinder body around the leaf groove from the leaf spring housing hole toward the cylinder chamber.

According to the rotary compressor of the present invention, even if the length of the leaf spring receiving hole is shortened, the leaf spring received in the leaf spring groove can urge the leaf to follow the rotary piston. Therefore, in the rotary compressor, the vane groove can be formed long in accordance with the shortening of the length of the vane spring receiving hole, and therefore, the sliding area between the vane and the vane groove can be increased, and the reliability can be improved.

Drawings

Fig. 1 is a longitudinal sectional view schematically showing the overall structure of a rotary compressor according to embodiment 1 of the present invention.

Fig. 2 is a transverse sectional view showing a main part of a compression mechanism section of a rotary compressor according to embodiment 1 of the present invention.

Fig. 3 is a transverse cross-sectional view showing a cylinder block of a rotary compressor according to embodiment 1 of the present invention.

Fig. 4 is a sectional view in the direction of the arrow a-a shown in fig. 3.

Fig. 5 is a modification of the rotary compressor according to embodiment 1 of the present invention, and is a transverse cross-sectional view showing a main part of a compression mechanism.

Fig. 6 is a transverse sectional view showing only a cylinder of the compression mechanism section shown in fig. 5.

Fig. 7 is a transverse cross-sectional view showing a cylinder block of a rotary compressor according to embodiment 2 of the present invention.

Fig. 8 is a transverse sectional view showing a main part of a compression mechanism section of a rotary compressor according to embodiment 3 of the present invention.

Fig. 9 is a transverse sectional view showing only a cylinder of the compression mechanism section shown in fig. 8.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. The configuration described in each drawing can be appropriately modified in shape, size, arrangement, and the like within the scope of the present invention.