JP5510515B2 - Rotary compressor - Google Patents

Description

  The present invention relates to a rotary compressor that can be incorporated into a refrigerator and an air conditioner.

  As a conventional technique, a rotary compressor described in Patent Document 1 is disclosed. FIG. 5 shows a conventional rotary compressor described in Patent Document 1. As shown in FIG. 5, this rotary compressor includes an airtight container having an oil reservoir at the bottom, and an inside of the container. The electric element housed in the cylinder, the cylinder 74 driven by the electric element, the opening of both ends being closed, the roller 73 rotating in the cylinder 74, and the roller 73 and the cylinder 74 form a compression space 75. A vane 71 that partitions the high-pressure side and the low-pressure side, and swings a cylindrical recess sliding part 76 formed on the roller 73 and a convex part swinging part 72 provided on the roller 73 side of the vane 71. It is disclosed to provide connection means for freely connecting.

JP 2000-120572 A

  By the way, in such a conventional rotary compressor, since the sliding surface is formed over the entire circumference of the cylindrical portion of the convex rocking portion 72 of the vane 71 as shown in FIG. When the convex rocking portion 72 is formed, the outer circumference of the cylindrical shape is gradually ground on the side surface of the cup grindstone, or the outer circumference of the cylindrical grindstone is the same as the radius of the convex rocking portion 72 of the vane 71. There is a method of forming the convex part oscillating part 72 by shaping into dimensions, dividing into two or three times, and grinding to form the former, but the former is less prone to roundness, cylindricity and surface roughness accuracy, In addition, the time required for machining increases the cost of vane production, and the latter causes problems in the accuracy of roundness, cylindricity, and surface roughness due to the collapse of the shape of the seam portion of the divided machining. Add shape accuracy and surface properties such as roundness, cylindricity, and surface roughness accurately and inexpensively. Since it is difficult to perform the sliding operation, the sliding of the concave sliding portion 76 of the roller 73 and the convex swinging portion 72 of the vane 71 is not smooth during operation, and the efficiency and reliability are reduced. The problem is that the cost is high and the compressor is expensive.

  The present invention has been made in view of such problems, and is equipped with a vane having a cylindrical convex rocking portion, so that the vane can be processed at a low cost with high efficiency and reliability. An object of the present invention is to provide an inexpensive rotary compressor.

  In order to achieve the above object, a rotary compressor according to a first aspect of the present invention provides a compression space formed by a cylinder closed at both ends, a roller rotating inside the cylinder, the roller and the cylinder. And a vane that divides the compression space into a high-pressure side and a low-pressure side, a hollow cylindrical concave sliding portion formed on the roller, and a cylindrical convex portion provided on the roller side of the vane. A rotary compressor that compresses and discharges the refrigerant that has been sucked in, and is configured to swingably connect the recess sliding portion and the convex rocking portion. The swinging portion is provided with a flat relief portion other than the tip of the vane.

The rotary compressor according to claim 2 forms a compression space by a cylinder closed at both ends, a roller that rotates in the cylinder, the roller and the cylinder, and the compression space is pressurized to a high pressure. And a hollow cylindrical concave sliding portion formed on the roller, and a cylindrical convex swinging portion provided on the roller side of the vane, the concave sliding A rotary compressor configured to swayably connect a moving portion and the convex portion oscillating portion, and compresses and discharges the sucked refrigerant, and has a planar shape provided on the convex oscillating portion The relief portion is made of material skin, processed skin, or both.

  The rotary compressor of the present invention can process the cylindrical shape of the convex rocking portion at a low cost by the flat relief provided in the convex rocking portion of the vane. Since the fitting portion between the roller and the vane smoothly fits when swinging, it is possible to provide a rotary compressor that is highly efficient and reliable and inexpensive.

The longitudinal cross-sectional view which shows the rotary compressor in the 1st Embodiment of this invention The top view which shows the roller and vane which are the principal parts of the rotary compressor in the 1st Embodiment of this invention The top view which shows the roller and vane which are the principal parts of the rotary compressor in the 2nd Embodiment of this invention. The top view which shows the roller and vane which are the principal parts of the rotary compressor in the 3rd Embodiment of this invention. Plan view showing rollers and vanes in a conventional rotary compressor

  According to a first aspect of the present invention, a compression space is formed by a cylinder closed at both ends, a roller rotating inside the cylinder, and the roller and the cylinder, and the compression space is divided into a high pressure side and a low pressure side. A vane, a hollow cylindrical concave sliding portion formed on the roller, and a cylindrical convex swinging portion provided on the roller side of the vane, the concave sliding portion and the convex swinging A rotary compressor that compresses and discharges the sucked refrigerant, and has a planar relief portion other than the tip of the vane. By providing, the processing can be performed at low cost, and the fitting part of the roller and the vane smoothly fits at the time of swinging, so that it is possible to provide a rotary compressor that is highly efficient and reliable and inexpensive. I can do it.

  In this way, because the relief part is formed in the convex rocking part of the vane that fits into the concave part sliding part of the roller, it is possible to process at low cost, with high efficiency and reliability, Furthermore, an inexpensive rotary compressor can be provided.

  In the second invention, a compression space is formed by the cylinder closed at both ends, the roller rotating in the cylinder, and the roller and the cylinder, and the compression space is divided into a high pressure side and a low pressure side. A vane, a hollow cylindrical concave sliding portion formed on the roller, and a cylindrical convex swinging portion provided on the roller side of the vane, the concave sliding portion and the convex swinging A rotary compressor that compresses and discharges the sucked refrigerant, and has a flat relief provided on the convex rocking portion. Processed skin or both.

  In this way, because the relief disposed on the convex rocking portion of the vane that fits with the roller is formed on the material skin or the processed skin or both, the relief portion is partially molded from the material, Since it is not necessary to process the vane and the vane can be processed at a lower cost, it is possible to provide an inexpensive rotary compressor having high efficiency and reliability.

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

(Embodiment 1)
FIG. 1 is a longitudinal sectional view showing a rotary compressor according to a first embodiment of the present invention, and FIG. 2 shows a roller and a vane which are main parts of the rotary compressor according to the first embodiment of the present invention. It is a top view.

  In FIG. 1, the rotary compressor according to the present embodiment is called a rotary compressor, and an electric element 106 provided in an upper part in a sealed container 101 made of metal such as iron, and the electric element 106. The rotary compression element 100 is provided below and is rotationally driven by a rotary shaft 105 fixed to the rotor 106 b of the electric element 106.

  In the rotary compressor of the present invention, the inside of the hermetic container 101 has a high pressure.

  The sealed container 101 has an oil reservoir at the bottom, and a container body 101 that houses the electric element 106 and the rotary compression element 100. The container body 101 includes an upper sealed lid 101a and a lower sealed lid 101b that are sealed. A terminal terminal (not shown) for supplying electric power to the electric element 106 is attached to the sealing lid 101a.

  The electric element 106 is composed of a stator 106a and a rotor 106b. The rotor 106b is formed by providing a permanent magnet (not shown) inside a laminated body made of laminated electromagnetic steel plates. Winding is attached to the laminated body which laminated | stacked the ring-shaped electromagnetic steel plate. This structure is referred to as a DC motor, but a motor referred to as an AC motor in which an aluminum core made of aluminum is inserted into laminated electromagnetic steel sheets may be used.

  The rotary compression element 100 allows the rotation of the rotation shaft 105 and closes the opening at the top of the cylinder 102, the cylinder 102 attached below the main frame 107, and the rotation in the cylinder 102. A roller 104 rotated by an eccentric portion 105 a of the shaft 105, a vane 20 (see FIG. 2) that forms a compression space in cooperation with the roller 104, and partitions the compression space into a high-pressure side and a low-pressure side, The rotary compression element 100 is configured to compress and discharge the sucked refrigerant. The main frame 107, the cylinder 102, and the bearing plate 108 are arranged in this order, and are connected by bolts 110.

  Next, the structure of the vane which is the main part of the present embodiment will be described with reference to FIG.

  In FIG. 2, a cylindrical recess sliding portion 56 is formed on a part of the outer periphery of the roller 104, and a cylindrical convex swinging portion 57 is formed on the roller 104 side of the vane 20. Yes. The convex rocking portion 57 is fitted to the concave sliding portion 56 and is connected to the convex rocking portion 57 and the concave sliding portion 56 so as to be swingable. A flat relief portion 20a is provided at a substantially central portion of 20 (a tip portion of the convex rocking portion 57 of the vane 20). The vane 20 is provided so as to move in a sliding groove 102 a formed in a part of the cylinder 102 so as to advance and retreat in the direction of the roller 104.

  By providing the relief portion 20a at the substantially central portion of the vane 20 of the convex portion oscillating portion 57 (the tip portion of the convex portion oscillating portion 57 of the vane 20), the sliding of the vane 20 and the roller 104 becomes smooth and friction loss occurs. Therefore, a highly efficient rotary compressor can be provided, and high reliability can be realized.

Here, the vane 20 first simultaneously processes the back surface 20b opposite to the escape portion 20a at the tip of the convex rocking portion 57 of the vane 20, and then the escape portion 20a which is the upper surface and the lower surface of the vane 20. Right-side surfaces 20c and 20d (opposite to the paper surface) of the back surface 20b are processed simultaneously with reference to the back surface 20b on the side opposite to the escape portion 20a. By simultaneously processing the flat surfaces 22e and 22f and the sliding surface 57a which is the cylindrical outer periphery of the convex rocking portion 57, the tip relief portion 20a is formed, and the convex rocking portion 57 is formed at the tip. Vane 20 can be manufactured.

(Embodiment 2)
FIG. 3 is a plan view showing rollers and vanes which are the main parts of the rotary compressor according to the second embodiment of the present invention. In addition, the same code | symbol is provided to the same component as above-mentioned Embodiment 1, and description is abbreviate | omitted.

  In FIG. 3, a cylindrical concave sliding portion 56 is formed on a part of the outer periphery of the roller 104, and a cylindrical convex swinging portion 59 is formed on the roller 104 side of the vane 22. Yes. The convex rocking portion 59 is fitted to the concave sliding portion 56 and is connected to the convex rocking portion 59 and the concave sliding portion 56 so as to be swingable. Two planar relief portions 22a are provided in addition to the center portion 20 (the tip portion of the convex rocking portion 57 of the vane 20).

  By providing two flat relief portions 20a in addition to the central portion of the vane 20 of the convex rocking portion 59 (the tip of the convex rocking portion 57 of the vane 20), the vane 20 and the roller 104 can slide. It becomes smooth, friction loss is reduced, a highly efficient rotary compressor can be provided, and high reliability can be realized.

  When there are two relief portions 22a, the two relief portions 22a of the convex rocking portion 59 are set to a desired angle after machining the planes 22e and 22f sliding with the vane groove 102a of the cylinder 102 at the same time. Then, the relief wheel 22a is formed into a circular shape by combining the vertical movement of the grinding wheel and the swivel movement of the vane 22 formed at the same radius as the convex rocking portion 59 and at a smaller angle than the semicircular shape. The convex rocking part 59 is machined into a cylindrical shape by three times so that the end of the grindstone is applied, and finally, a right angle surface based on the R-shaped part at the tip of the convex rocking part 59 By processing 22c and 22d (opposite to the paper surface) at the same time, the vane 22 having a convex rocking part with high accuracy in cylindricity and surface roughness can be produced.

(Embodiment 3)
FIG. 4 is a plan view showing rollers and vanes which are the main parts of the rotary compressor according to the third embodiment of the present invention. The same components as those in the first and second embodiments described above are assigned the same reference numerals and the description thereof is omitted.

  In FIG. 4, a cylindrical recess sliding portion 56 is formed on a part of the outer periphery of the roller 104, and a cylindrical convex swinging portion 61 is formed on the roller 104 side of the vane 24. . The convex rocking part 61 is fitted to the concave sliding part 56 and is connected to the convex rocking part 61 and the concave sliding part 56 so as to be pivotable. The recess 24a and a flat portion which is a relief portion are formed on both sides of the recess 24a. Since the recesses 24a and the flat portions 24b on both sides thereof can be processed at low cost as shown in the first and second embodiments, the sliding resistance during operation can be reduced and the efficiency can be reduced. And a highly reliable compressor. Furthermore, since there is not only the flat portion 24b but also the recess 24a, the amount of refrigerating machine oil can be increased, so that the concave sliding portion 56 of the roller 104 and the convex swinging portion 61 of the vane 24 during operation can be increased. Since it becomes possible to supply refrigeration oil abundantly to the gap, a more reliable compressor can be provided.

Here, the flat portion 24b may be processed and manufactured, and the recess 24a may be processed, but may be molded at the stage of material production. Therefore, the material with a dent can be easily manufactured by using a sintering method or a metal injection molding method for manufacturing the material.

  Furthermore, since the step of machining the relief portion can be omitted by forming the relief portion with a material, the vane 24 can be manufactured at a lower cost, so that the compressor is inexpensive, efficient and reliable. Can be provided.

  In this way, since the relief portion disposed on the convex rocking portion 61 of the vane 24 fitted with the roller 104 is formed by the raw material skin and / or the processed skin, there is no need to process, and the lower Since the vane can be processed at a low cost, it is possible to provide an inexpensive rotary compressor having high efficiency and reliability.

  As described above, the rotary compressor according to the present invention can be processed at low cost by the relief portion provided in the convex portion swinging portion of the vane, and therefore the fitting portion between the roller and the vane swings. Since it can be fitted smoothly, sometimes it is possible to provide an inexpensive rotary compressor with high efficiency and reliability, it can also be applied to compressors for water heaters and air compression.

20, 22, 24 Vane 20a, 22a Escape part 24a Depression 24b Flat part 56 Recessed part sliding part 57, 59, 61 Convex part swinging part 102 Cylinder 102a Sliding groove 104 Roller

Claims (2)

A cylinder closed at both ends, a roller rotating in the cylinder, a compression space formed by the roller and the cylinder, and a vane that partitions the compression space into a high-pressure side and a low-pressure side, and the roller A hollow cylindrical concave sliding portion formed and a cylindrical convex swinging portion provided on the roller side of the vane, and swinging the concave sliding portion and the convex swinging portion. A rotary compressor that is configured to be freely connected and compresses and discharges the sucked refrigerant,
The convex oscillating portion is formed with planar relief portions at two locations, one planar relief portion is formed on the high pressure side, and the other planar relief portion is formed on the low pressure side,
2. The rotary compressor according to claim 2, wherein the two planar relief portions are formed over the entire width in the axial direction . The rotary compressor according to claim 1, wherein the planar relief portion is material skin or processed skin or both .