CN-122014612-A - Rotary compressor, equipment and indoor air conditioner
Abstract
A compression mechanism (30) has a cylinder (31), a piston (32), and a vane (33), a shaft (40) has an eccentric portion (42), a groove is formed in the cylinder, the eccentric portion is disposed in the cylinder, the piston is fitted with the eccentric portion, a cylindrical groove (32 a) having an arc angle alpha exceeding 180 DEG is formed in the piston, a cylindrical portion (33 b) disposed in the cylindrical groove is formed at an end of the vane, the vane (33) operates without leaving the piston, a notch portion (33 d) is formed in the cylindrical portion from one end surface to the other end surface of the cylindrical portion, the arc surface (33 e) of the cylindrical portion is divided into a plurality of arc angles beta of less than 180 DEG by the notch portion, the notch portion (33 d) is set to an arc angle gamma of less than 45 DEG, and the machining accuracy of the arc surface of the cylindrical portion can be improved.
Inventors
- NAKAI TOSHIAKI
- IMAI YUSUKE
- HASEBE OSAMU
Assignees
- 松下知识产权经营株式会社
Dates
- Publication Date
- 20260512
- Application Date
- 20250124
- Priority Date
- 20240130
Claims (4)
- 1. A rotary compressor, characterized in that: the motor part and the compression mechanism part are arranged in the closed container, The motor unit and the compression mechanism unit are coupled by a shaft, The compression mechanism part comprises a cylinder, a piston arranged in the cylinder, and a vane for separating the cylinder, The shaft has an eccentric portion that, A vane groove for disposing the vane is formed on the cylinder, The eccentric portion is disposed in the cylinder, The piston is embedded with the eccentric part, A cylindrical groove with an arc angle exceeding 180 degrees is formed on the piston, A cylindrical portion disposed in the cylindrical groove is formed at an end portion of the vane, The vane being actuated without leaving the piston, wherein A notch portion is formed in the cylindrical portion from one end face to the other end face of the cylindrical portion, The circular arc surface of the cylindrical part is divided into a plurality of parts by the notch part, Each arc surface is made into an arc angle smaller than 180 degrees, The notch part is made into an arc angle smaller than 45 degrees, The piston uses a low hardness material having a Vickers hardness of Hv400 or less on a surface of the piston, The notch portion is formed at a blade tip portion of the blade.
- 2. The rotary compressor of claim 1, wherein: the circular arc surface is formed on the outer peripheral surface of the cylindrical portion so as to be separated into at least two, The two arc surfaces are disposed at positions closest to the extended virtual plane X.
- 3. An apparatus, characterized in that: Use of a rotary compressor according to claim 1 or 2, The rotary compressor, the condenser, the pressure reducing device and the evaporator are connected into a ring shape through pipes.
- 4. An indoor air conditioner is characterized in that: Use of a rotary compressor according to claim 1 or 2, The rotary compressor, the condenser, the pressure reducing device and the evaporator are connected into a ring shape through pipes.
Description
Rotary compressor, equipment and indoor air conditioner The present application is a divisional application of patent application entitled "rotary compressor and apparatus" with application number 202510116972.5, 24 days 1 in 2025. Technical Field The present invention relates to a rotary compressor in which blades are operated without leaving a piston, and an apparatus using the rotary compressor. Background Patent document 1 discloses a rotary compressor in which a cylindrical groove is formed in a piston and a cylindrical portion disposed in the cylindrical groove is formed at an end portion of a vane so that the vane is operated without being separated from the piston. Patent document 2 discloses a compressor in which the side surface of the cylindrical portion of the vane is D-cut in order to improve the workability of the side surface of the vane. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 3-185291 Patent document 2 Japanese patent application laid-open No. 2012-237317 Disclosure of Invention Problems to be solved by the invention The vane end portion is fitted in a groove provided in the piston, and the vane cylindrical portion and the piston groove slide in the circumferential direction, so that the piston groove and the vane cylindrical portion need to be finished with high precision. If the blade cylindrical portion is an arc angle exceeding 180 °, the blade cylindrical portion needs to be finished twice or more. The seam of the machined surface causes a decrease in the accuracy of the cylindrical portion. Accordingly, an object of the present invention is to provide a rotary compressor capable of improving machining accuracy of an arc surface of a cylindrical portion, and an apparatus using the rotary compressor. Means for solving the problems The first aspect of the present invention provides a rotary compressor 1, comprising a motor unit 20 and a compression mechanism unit 30 in a sealed container 10, wherein the motor unit 20 and the compression mechanism unit 30 are connected by a shaft 40, the compression mechanism unit 30 comprises a cylinder 31, a piston 32 disposed in the cylinder 31, and a vane 33 partitioning the cylinder 31, the shaft 40 comprises an eccentric portion 42, a groove in which the vane 33 is disposed is formed in the cylinder 31, the piston 32 is fitted with the eccentric portion 42, a cylindrical groove 32a having an arc angle α exceeding 180 ° is formed in the piston 32, a cylindrical portion 33b disposed in the cylindrical groove 32a is formed at an end of the vane, the vane 33 is operated without leaving the piston 32, the rotary compressor 1 is characterized in that a notch portion 33d is formed in the cylindrical portion 33b from one end face to the other end face of the cylindrical portion 33b, the cylindrical portion 33e is divided into a plurality of arc faces 33e having an arc angle β smaller than 180 ° by the notch portion 33d, and the arc angle β is set to be smaller than the arc angle β of the arc angle 33 d. The rotary compressor 1 according to the second aspect of the present invention is the first aspect, wherein the notch portion 33d is formed at a blade tip portion of the blade 33. In the rotary compressor 1 according to the third aspect of the present invention, in addition to the first or second aspect, at least two circular arc surfaces 33e are formed on the outer peripheral surface of the cylindrical portion 33b, and the two circular arc surfaces 33e are arranged at positions closest to the virtual extended surface X of the side surface of the vane 33. A fourth aspect of the present invention provides an apparatus using the rotary compressor 1 according to the first or second aspect, wherein the rotary compressor 1, the condenser 2, the pressure reducing device 3, and the evaporator 4 are connected in a ring shape by piping. Effects of the invention According to the present invention, the machining accuracy of the circular arc surface of the cylindrical portion can be improved by dividing the circular arc surface of the cylindrical portion into a plurality of circular arc angles by the notch portion from one end surface to the other end surface of the cylindrical portion and setting each circular arc surface to be less than 180 °, and the contact area between the cylindrical groove and the cylindrical portion can be increased by setting the notch portion to be less than 45 °, so that refrigerant leakage can be reliably prevented. Drawings Fig. 1 is a sectional view showing a rotary compressor according to an embodiment of the present invention. Fig. 2 is a view of the line A-A shown in fig. 1. Fig. 3 is a diagram showing a piston and a vane for a rotary compressor according to the same embodiment. Fig. 4 is a view showing a process of manufacturing a vane for a rotary compressor according to the same embodiment. Description of the reference numerals 1. Rotary compressor 2. Condenser 3. Pressure reducing devi