JPS6357888A - Closed type compressor - Google Patents

Abstract

PURPOSE:To eliminate the need of bringing a roller into an eccentric state, to reduce production of vibration due to rotation of a roller, to reduce the size of a compressor, and to reduce the number of high-precise parts, by a method wherein the roller is rotated by a drive shaft, and a refrigerant is compressed in the direction of the roller shaft. CONSTITUTION:When a roller 8 is rotated by means of a drive shaft 4, a refrigerant is sucked in a hollow chamber 10 through a suction port 7 in a way that a level on a sloped surface is lowered orderly from a to[p part 12 of a protuberant part 11 formed on the surface on the main bearing 6 side of the roller 8. The refrigerant is compressed by a compressing part 15, being the side which the top part 11 of the protuberant part 12 of a hollow chamber 10 approaches, as a top part 12 is caused to approach a blade 13 by means of the roller 8. When the pressure of the refrigerant is increased to a given value, a delivery valve 19 is opened, and the refrigerant is discharged through a discharge port 18. This constitution, since the refrigerant is compressed in the direction of the shaft of the roller 8, eliminates the need of bringing the roller 8 into an eccentric state, and enables reduction of production of vibration and the size of a compressor.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a hermetic compressor used in near conditioners, etc., and particularly relates to a hermetic compressor with an improved structure of a compression element. It is something.

(Prior Art) Hermetic compressors are generally classified into rotary hermetic compressors and reciprocating hermetic compressors.

Conventionally, for example, a vertical rotary hermetic compressor has been constructed as shown in FIG. As shown in the figure, an electric element C is housed above and a compression element d is housed below in a hermetically sealed casing b of the rotary hermetic compressor 11a. Electric! ! ? The +0 element C is provided with a stator e fixed to a sealed casing b and a rotor f rotating within the stator e.

A drive shaft Q is provided at the center of this []-taper f, and is suspended to the compression element C. This compression element d is provided with a cylindrical cylinder h through which a drive shaft g is inserted, fixed to a closed casing b.

This cylinder h supports a drive shaft Ω and is held by a bearing j that forms a cylinder chamber i within the cylinder h. A crank portion k is formed eccentrically on the drive shaft Q located within the cylinder 3. 0-51 is fitted into this crank part k. The above cylinder h
A blade holder is interposed to partition the inside of the cylinder chamber i into a suction side and a discharge side, and a spring n presses the roller 1 from the outside in the radial direction.

The rotary hermetic compressor a configured as described above compresses the refrigerant by the eccentric rotation of the row 51 within the cylinder chamber i.

(Problems to be Solved by the Invention) The rotary hermetic compressor a described above has the following problems.

There was a problem in that vibrations were generated because the roller 1 rotated eccentrically within the cylinder chamber i.

For this reason, the inner diameter of the cylinder h had to be increased, which caused the problem that the width of the pressure N machine increased.

In addition, due to its structure, the accuracy of each part is strictly required, and there are many parts that require precision such as dimensional tolerance and squareness compared to a reciprocating hermetic compressor, which increases the number of parts machining and reduces manufacturing costs. The problem was that it was growing.

In view of the above-mentioned problems, the present invention takes advantage of the structural advantages of both the rotary type hermetic compressor and the reciprocating type hermetic compressor, and reduces the number of parts that require strict accuracy with less imaging. The purpose is to provide a hermetic compressor with a reduced number of units.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a cylindrical cylinder, a roller that is rotationally driven within the cylinder, and a roller that rotates in the axial direction of the roller. a partition wall provided on at least one surface of the cylinder and forming a hollow chamber between it and the inner circumferential wall of the cylinder, and a ring-shaped partition wall formed on the roller surface facing the partition wall, sequentially starting from one side in the circumferential direction. a raised part having an inclined surface so that the top touches the ring-shaped raised part, and a blade in the middle of the ring-shaped raised part for partitioning the side of the hollow chamber near the top into a compression part and the opposite side into a suction part. It is equipped with the following.

(Function) Constructed as described above, the blade is pressed from the partition wall side so as to cross a ring-shaped protuberance formed on at least one surface of the roller in the axial direction, The rotation of the O-ra causes it to reciprocate in the axial direction along the inclined surface of the raised portion, and the blade partitions the hollow chamber formed by the inner wall of the cylinder, the partition wall, and the roller into a compression section and a suction section. As a result of the rotation of the roller, the top of the protrusion compresses the side closer to the blade as a compressor.

(Example) An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The present invention is particularly characterized by a compression element of a hermetic compressor.

FIG. 1 shows the structure of a compression element 2 of a hermetic compressor 1 according to the present invention. As shown in the figure, the compression element 2 is provided with a cylindrical cylinder 3. Inside this cylinder 3 is T1!71! ! A drive shaft 4 extending from an L element (not shown) is inserted therethrough. Both ends of the cylinder 3 in the axial direction form a cylinder chamber 5 within the cylinder 3, and are held between a main bearing 6 and a sub-bearing 7 that pivotally support the drive shaft 4.

A roller 8 is fitted onto the drive shaft 4 located within the cylinder chamber 5 so as to be coaxial with the inner diameter of the cylinder 3 and the drive shaft 4 . The roller 8 is rotated by a drive shaft 4 with its outer peripheral portion slidingly contacting the inner peripheral wall of the cylinder 3. A partition wall 9 is provided at a predetermined interval on at least one of the rollers 8 in the axial direction, that is, in this embodiment, on the surface of the row 58 on the main bearing 6 side.

This partition wall 9 is formed integrally with the main bearing 6 in this embodiment. This partition wall 9, the surface of the roller 8 on the main bearing 6 side, and the inner peripheral wall of the cylinder 3 form a hollow chamber 10. A ring-shaped raised portion 11 is formed along the circumferential direction of the roller surface facing the partition wall 9, that is, the surface of the roller 8 on the main bearing 6 side. This ring-shaped protuberance 11 is successively formed on the partition wall 9 from one side in the circumferential direction of the roller 8.
It has an inclined surface that rises so that its top 12 touches and then descends. Specifically, the raised portion 11 is formed to have a sinusoidal curve along the circumferential direction of the roller 8 as shown in FIG. 2, and the top of this sinusoidal curve is in contact with the partition wall 9. A blade 13 is positioned in the middle of this ring-shaped raised portion 11 so as to traverse it in the radial direction.

This blade 13 is pressed against the raised portion 11 from the partition wall 9 side. Specifically, the blade 13 is pressed against the protrusion 11 in the axial direction by a spring 14 from the main bearing 6 . As shown in FIGS. 3 and 4, this blade 13 has a raised portion 11 inside the hollow chamber 10.
The side adjacent to the top 12 of the refrigerant is partitioned into a compression part 15, and the opposite side is partitioned into a suction part 16, thereby sealing the compressed refrigerant from flowing out from the compression part 15 side to the suction part 16 side. A suction port 17 is formed in the main bearing 6 that holds the blade 13 and includes the partition wall 9 of the suction portion 161IllI, and a discharge port 18 is formed in the main bearing 6 that includes the partition wall 9 on the compression portion 15 side. .

This discharge port 18 is provided with a discharge valve 19 that is opened at a constant pressure.

Next, the operation of an embodiment of the hermetic compressor 1 of the present invention constructed as described above will be described.

The refrigerant compression operation of the compression element 2 of the hermetic compressor 1 of the present invention is performed as follows. First, the drive shaft 4 drives the row 58.
is rotated, and the slope surface gradually descends from the top 12 of the protrusion 11 formed on the surface of the roller 8 on the main bearing 6 side, so that the refrigerant is sucked into the hollow chamber 10 from the suction port 17.

The refrigerant sucked in in the previous step is compressed as the compressor 15 approaches the top 12 of the protrusion 11 of the hollow chamber 10 as the compressor 15 approaches the blade 13 by the rotation of the row 58 . When the refrigerant to be compressed reaches a certain pressure, one of the discharge valves is opened and the compressed refrigerant is discharged from the discharge port 18. After the inclined surface of the raised portion 11 is raised by the rotation of the roller 8, the blade 13 moves back and forth in the axial direction to partition and seal the hollow chamber 10 into a suction portion 16 and a compression portion 15. It looks like this.

That is, the refrigerant is compressed by the inner wall of the cylinder 3, the partition wall 9.
It is formed at the top part 12 of the raised part 11 formed on the surface of the 0-ra 8 on the partition wall 9 side, and the f-constricted part 15 surrounded by the blade 13. By rotating the roller 8 by the drive shaft 4 in this manner, the refrigerant is compressed in the axial direction of the roller 8.

This has the structure of both a rotary hermetic compressor and a reciprocating hermetic compressor.

In particular, the suction, compression, and discharge operations can be performed smoothly if the protrusion 11 is formed to have a sinusoidal shape along the circumferential direction of the roller 8. In order to compress the refrigerant in the axial direction of the roller 8, there is no need to make the row 58 eccentric, unlike in a rotary hermetic compressor that compresses the refrigerant in the radial direction of the roller 8. Rather, unless the roller 8 is provided coaxially within the cylinder 3 and rotated so that the outer circumferential portion of the roller 8 is in sliding contact with the inner circumferential wall of the cylinder 3, the gap between the outer circumferential portion of the roller 8 and the inner circumferential wall of the cylinder 3 Pressure will leak. In this way, there is no need to eccentricize the roller 8, so
Unlike a rotary hermetic compressor, there is no need to form a crank part on the drive shaft 4 located in the cylinder chamber 5, and the precision of dimensional tolerances, squareness, etc. of the inner wall shape of the cylinder 3 is relaxed, etc. , the number of parts required for one exact structural step is reduced. Therefore, there is no need for eccentricity of the roller 8.
The vibration caused by the rotation of the roller 8 is reduced, and the inner diameter of the cylinder 3 is reduced.

Note that the @starting portion 11 is formed on both sides of the roller 8 in the axial direction, that is, on both sides of the main bearing side and the sub-bearing 7 side,
By configuring the partition wall 9, hollow chamber 101, blade 13, etc. in the same manner, compression can be performed on both sides of the roller 8 in the axial direction, and the compressor can also function as a reciprocating reciprocating hermetic compressor.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) Since the roller is coaxially inside the cylinder and rotated with the outer circumferential part slidingly in contact with the inner circumferential wall of the cylinder, there is no eccentricity of the roller compared to conventional rotary closed type compressors, and the rotation of the roller is Vibration can be reduced.

(2) Furthermore, since there is no eccentricity of the rollers, the inner diameter of the cylinder can be reduced, and the hermetic compressor can be downsized.

(3) Furthermore, since there is no eccentricity of the rollers, the number of structural parts such as the crank part that require strict precision is reduced, the number of parts machining steps is reduced, and manufacturing costs can be reduced.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of the hermetic compressor of the present invention 1!1
2 is a perspective view showing the relationship between a roller, a drive shaft, and a blade in an embodiment of the hermetic compressor of the present invention, and FIG. 3 is a perspective view of an embodiment of the hermetic compressor of the present invention. FIG. 4 is a plan view of the compression element of the hermetic compressor of the present invention, and FIG. 5 is a longitudinal cross-sectional view of a conventional example. In the figure, 1 is a hermetic compressor, 3 is a cylinder, 8 is a roller,
9 is a partition wall, 10 is a hollow chamber, 11 is a raised portion, 12 is a top portion, and 13 is a blade. Patent applicant Toshiba Corporation Patent attorney
Nobuo Kinutani IO/vP Viewer Figure 1 11 = Kibei Residence Figure 21 Figure 3 Figure 4

Claims (2)

[Claims] (1) A cylindrical cylinder, a roller that is rotationally driven within the cylinder, and a partition wall that is provided on at least one surface of the roller in the axial direction and that forms a hollow chamber between the inner circumferential wall of the cylinder. and a raised part formed in a ring shape on the roller surface facing the partition wall and having an inclined surface such that the top touches the partition wall sequentially from one side in the circumferential direction, and the hollow part in the middle of the ring-shaped raised part. A hermetic compressor comprising a blade for partitioning the side of the chamber near the top into a compression section and the opposite side into a suction section. (2) The hermetic compressor according to claim 1, wherein the ring-shaped raised portion is formed to have a sinusoidal curve along the circumferential direction of the roller.