JP2918951B2 - compressor - Google Patents

Description

The present invention relates to a compressor incorporated in a refrigeration cycle such as an air conditioner or a refrigerator, and particularly to a helical compressor employed in the compressor. The present invention relates to a blade structure of a blade.

(Prior art) Various refrigerating machines such as an air conditioner for cooling and heating the room, a refrigerator, and a showcase are provided with a refrigerating cycle.
This refrigeration cycle incorporates a compressor that compresses the circulating refrigerant. Conventionally, a reciprocating compressor or a rotary compressor is well known as this kind of compressor.

These compressors incorporate an electric motor unit and a compressor unit in a closed casing, transmit the rotational driving force generated by the electric motor unit to the compressor unit via a crankshaft, drive the compressor unit, and generate refrigerant gas. Is compressed.

However, the conventional compressor requires an intermediate power transmission mechanism such as a crankshaft for transmitting the rotational driving force from the electric motor section to the compressor section, so that the number of parts is large, and the structure of the compressor section is complicated, Also, in order to increase the compression efficiency, it was necessary to provide a check valve on the discharge side of the compressor section. In the case where a check valve is provided, the pressure difference between both sides of the valve is very large, and this pressure difference easily causes leakage of the refrigerant gas, and it is difficult to improve the compression efficiency due to the gas leakage.

(Problems to be Solved by the Invention) A conventional reciprocating type or rotary type compressor requires an intermediate power transmission mechanism such as a crankshaft and has a large number of parts, and the structure of the compressor section is complicated and the compression efficiency is reduced. In order to improve the dimensional accuracy, it is necessary to increase the dimensional accuracy and processing / assembly accuracy of each part, and as a result, the manufacturing cost has been increased.

Therefore, recently, a new type compressor employing a helical blade has been developed instead of a reciprocating type or a rotary type compressor. In this compressor, a helical blade is provided in a helical groove of unequal pitch of a roller piston so as to be freely retractable. The helical blade enters and exits the helical groove while elastically deforming, and acts as a partition between the high-pressure side and the low-pressure side.Therefore, the force of the differential pressure acts on the blade surface, causing the helical blade to deform or break. This may cause a problem of lowering durability.

The present invention has been made in consideration of the above-described circumstances, and has as its object to provide a compressor in which deformation, breakage, and wear of a helical blade are effectively prevented to improve durability and reliability.

[Configuration of the invention]

(Means for Solving the Problems) In order to solve the above-described problems, a compressor according to the present invention is a compressor in which a compressor section is housed in a closed casing, wherein the compressor section includes a sleeve-shaped cylinder, A roller piston rotatably supported at an eccentric position, and a helical blade provided in the helical groove of the piston so as to be able to protrude and retract, wherein the helical blade is filled with glass fiber as a reinforcing material. It is made of a material, and glass fibers are dissolved and removed from the blade surface by hydrofluoric acid treatment.

In order to solve the above-mentioned problems, a compressor according to the present invention is a fluorine-based compressor in which glass fibers are used as a reinforcing material for a helical blade, and at least one of a heat-resistant polymer material and a liquid crystal polymer is used as a wear-resistant material. It is formed of a resin material, and glass fibers are dissolved and removed from the blade surface by hydrofluoric acid treatment.

Furthermore, in the compressor according to the present invention, the helical blade is formed by combining a metal material as a reinforcing material with a resin material such as a fluorine-based resin, and the surface of the metal plate is made to be a wear-resistant surface.

(Operation) The helical blade incorporated in the compressor part of this compressor is made of a fluororesin material filled with glass fiber, and the glass fiber is dissolved and removed from the blade surface. The frictional resistance between the blade and the helical groove of the roller piston can be suppressed, and the durability, compression performance, and reliability can be improved.

Further, the helical blade incorporated in the compressor section is formed of a fluororesin material filled with glass fiber as a reinforcing material and at least one of a heat-resistant polymer material and a liquid crystal polymer as an abrasion-resistant material. When the glass fiber is dissolved and removed, the wear resistance of the helical blade is improved and the strength is also improved, so the frictional resistance between the helical blade and the helical groove of the roller piston can be suppressed, and the durability, compression performance and reliability can be improved. It can be further improved.

When the helical blade is formed by combining a resin material and a metal plate, and the surface of the metal plate is a wear-resistant surface, deformation and wear of the helical blade can be effectively prevented.

(Embodiment) Hereinafter, an embodiment of a compressor according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 relates to a compressor incorporated in a refrigerating cycle such as an air conditioner or a refrigerator. In the compressor, a motor unit 11 and a compressor unit 12 are concentrically housed in a closed casing 10. The motor unit 11 includes a stator 13 fixed to the inner peripheral wall of the closed casing 10 by press-fitting and the like.
And a rotor 14 housed in the rotor 13. The rotor 14 is driven to rotate by energizing the electric motor unit 11.
The rotor 14 is axially mounted on a sleeve-like cylinder 15 constituting the compressor section 12, and is supported integrally with the rotor.

On the other hand, the compressor section 12 includes the sleeve-shaped cylinder 15, a rod-shaped roller piston 16 rotatably supported at an eccentric position in the cylinder 15, and a helical groove 17 (second A helical blade 18 (see FIG. 3) provided so as to be able to come and go freely.
The cylinder 15 and the roller piston 16 are
Are rotatably supported by bearings 20a and 20b fixed in the end walls of the first and second members. As shown in FIGS. 4 and 5, the cylinder 15 and the roller piston 16 of the compressor section 12
They are linked to each other by an engagement groove 21 and an engagement groove 22 so that they can be integrally rotated.

Further, the helical groove 17 formed in the roller piston 16 and the helical blade 18 that can freely move in and out of the helical groove 17 are substantially complementary to each other, and the outer peripheral surface of the helical blade 18 is in internal contact with the inner peripheral wall surface of the cylinder 15. doing. The helical blade 18 divides a working chamber 25 formed between the cylinder 15 and the roller piston 16 into a plurality of substantially crescent-shaped compression chambers having a multistage continuous compression structure. The helical blades 18 are formed at unequal pitches so that the pitch in the blade winding direction gradually decreases from one side to the other side.
The helical blade 18 serves as a partition between a high-pressure side and a low-pressure side in the working chamber 25 as a compression chamber.

Reference numeral 26 denotes a suction hole provided in one of the bearings 20a. The suction hole 26 communicates with a suction pipe 27 fixed to the closed casing 10.
Through the passage, the refrigerant gas is sucked into the first-stage compression chamber on the low-pressure side of the working chamber 25. Further, a discharge hole 28 extending from the final-stage compression chamber of the working chamber 25 is opened to a chamber 29 in the closed casing 10 through the other bearing 20b. The compressed refrigerant gas guided into the chamber 29 is discharged to the outside of the closed casing 10 through the discharge pipe 30.

A lubricating oil 31 is stored at the bottom of the hermetically sealed casing 10, and the lubricating oil 31 is pumped by a pump action accompanying the rotation of the roller piston 16 into a sliding portion of the compressor section 12, for example, a helical groove 17 through a pump passage 32. To lubricate the sliding portion, press the helical blade 18 outward in the radial direction, and bring the blade outer peripheral surface into close contact with the inner peripheral wall surface of the cylinder 15.

By the way, the helical blade 18 has a pressure difference between the high pressure side and the low pressure side acting on the blade side surface.
As shown in the figure, the frictional resistance of the helical blade 18a that is deformed to the low pressure side and protrudes and retracts in the helical groove 17 increases.
From this point, a preferred helical blade 18 with reduced blade deformation is shown in FIGS. 7 and 10. The helical blade 18 is formed of a fluororesin material. The helical blade 18 is a fluorine-based material filled with at least one of a heat-resistant polymer material such as polyimide, polyamide imide, and polyetheretherketone and a liquid crystal polymer such as aromatic polyamide and aromatic polyester as a reinforcing material and a wear-resistant material. It is made by molding resin material 34, improving the strength and wear resistance of the helical blade 18,
The deformation of the helical blade 18 at the time of appearance is minimized.

Next, the operation of the compressor employing the helical blade will be described.

By energizing the motor section 11 of the compressor, the rotor 14 is driven to rotate, and the cylinder 15 of the compressor section 12 is rotated integrally with the rotor 14. By the rotation of this cylinder 15, the roller piston
16 also rotates together.

At this time, the roller piston 16 is eccentrically supported by a predetermined deviation amount e from the rotation axis of the cylinder 15. as a result,
The roller piston 16 rotates so as to always inscribe the inner peripheral wall of the cylinder 15. And cylinder 15 and roller piston
The working chamber 25 formed between the roller piston 16 and the working chamber 25 is partitioned by the helical blade 18 into a plurality of compression chambers having a multi-stage structure. .

The operation of the compressor unit 12 causes the suction pipe 27 to move from the suction hole 26 to the suction hole 26.
The refrigerant gas sucked into the first-stage compression chamber of the working chamber 25 by the rotation of the roller piston 16 passes through FIG.
As shown in (D), the compressed air is gradually and continuously compressed along the winding direction of the helical blade 18 and gradually moves to the high-pressure side compression chamber. Guided to chamber 29. The compressed refrigerant gas is subsequently discharged to the refrigeration cycle outside the closed casing 10 via the discharge pipe 30.

A helical blade housed in the roller piston 16 so as to be able to come and go when the refrigerant compresses in the compressor section 12.
Since 18 is a partition between the high pressure side and the low pressure side, a force corresponding to the differential pressure acts on the side surface of the blade.

However, in this case, as shown in FIG. 8, a helical blade 18 formed of a fluororesin material is used for heat-resistant polymer materials such as polyimide, polyamide imide, polyether ether ketone, aromatic polyamide, and aromatic polyester. At least one type of liquid crystal polymer such as 35 is a reinforcing material,
It is filled as a wear-resistant material and is reinforced in strength to improve wear resistance. For this reason, the deformation of the helical blade 18 can be effectively prevented, and the action of projecting into and out of the helical groove 17 can be made smooth and smooth. At this time, the heat-resistant polymer material or the liquid crystal polymer 35 exposed on the surface of the helical blade 18 makes the sliding surface smooth, and can suppress the abrasion.

Next, a modified example of the helical blade incorporated in the compressor section will be described.

In general, when the helical blade is too soft, it is greatly deformed to the low pressure side as shown in FIG. 6 due to the differential pressure acting on the blade side surface, and the abrasion resistance of the helical blade 18a that appears and disappears in the helical groove 17 is reduced. growing. From this point,
To prevent deformation of the helical blade 18b, as shown in FIG. 10, on the low pressure side where the helical blade 18b deforms,
It is also conceivable to fill the glass fiber 40 as a filler to reinforce one side of the helical blade 18b.

However, in this case, since the glass fiber 40 is exposed on the blade side surface of the helical blade 18b, the glass fiber
It is conceivable that 40 promotes abrasion of the side surface of the helical groove 17 of the roller piston 16 made of aluminum or the like, thereby causing a decrease in compressor performance or a decrease in durability.

From this point, it is conceivable that the helical blade entirely reinforces a resin material such as a fluororesin with a reinforcing material. In particular, the first as the preferred helical blade 18A
There is one shown in Figure 1. The helical blade 18 is made of a fluororesin material 34 filled with glass fibers 40 as a reinforcing material.
The molded helical blade 18A is immersed in a hydrofluoric acid solution for a predetermined time to perform a surface treatment, and the glass fiber 40 exposed on the surface of the helical blade 18 is dissolved and removed,
The glass fiber 40 is not exposed on the blade surface. Further, reinforcing fibers such as whiskers may be used instead of glass fibers as a reinforcing material.

In this case, as shown in FIG. 11, the helical blade 18A formed of a fluororesin material is reinforced by filling the glass fibers 40 almost entirely in a dispersed state, thereby effectively preventing deformation of the blade. it can. Further, since the hydrofluoric acid treatment is performed on the blade surface of the helical blade 18A to dissolve and remove the glass fiber 40 exposed on the blade surface, the glass fiber 40 is not exposed on the blade surface. For this reason, the sliding action of the helical blade 18A protruding and retracting in the helical groove 17 of the roller piston 16 can be performed smoothly, and the frictional resistance of the sliding portion can be reduced,
Wear of the helical groove 17 can also be suppressed, and durability can be improved. In addition, since the glass fibers 40 remain in the helical blade 18A, the reinforcing effect of the blade can be maintained,
The deformation and breakage can be prevented.

FIG. 11 shows an example in which a fluorinated resin material 34 filled with glass fiber 40 as a reinforcing material is treated with hydrofluoric acid to form a helical blade 18A.The helical blade 18B is shown in FIG. It may be configured as follows.

The helical blade 18B shown in FIG. 12 is composed of a fluororesin material 34, a glass fiber 40 as a reinforcing material, and at least one of a heat-resistant polymer material and a liquid crystal polymer as a wear-resistant material also serving as reinforcement (abrasion-resistant material). After filling with 45 and molding the fluororesin material 34 filled with these, the molded helical blade 18B is immersed in, for example, a hydrofluoric acid solution for a predetermined time to dissolve and remove the glass fibers exposed on the surface. The heat-resistant polymer material constituting the wear-resistant material 45 includes polyimide, polyamide imide, polyether ether ketone and the like, and the liquid crystal polymer includes aromatic polyamide and aromatic polyester.

Also in this case, the helical blade 18B made of a fluororesin material is reinforced by being filled with the glass fiber 34, so that the deformation of the blade can be effectively prevented. Further, since the blade surface of the helical blade 18B is subjected to hydrofluoric acid treatment to dissolve and remove the glass fibers 34 exposed on the blade surface, the glass fibers 34 are not exposed on the blade surface. As a result, the sliding action of the helical blade 18 that is protruded and retracted in the helical groove 17 of the roller piston 16 can be performed smoothly, the frictional resistance of the sliding portion can be reduced, and the wear of the helical groove 17 is suppressed. Thus, the durability can be improved.

Further, since the glass fibers 40 remain in the helical blade 18B, the reinforcing effect of the blade can be maintained, the deformation and breakage thereof can be prevented, and the surface of the blade is made of heat-resistant polymer material or liquid crystal polymer. Since the wear-resistant material 45 is filled in a dispersed state, wear of the helical blade 18B on the sliding surface can also be suppressed.

Further, in the embodiment shown in FIG. 11 and FIG. 12, the example in which the fluorinated resin material 34 filled with the glass fiber 40 is molded and treated with hydrofluoric acid to form the helical blades 18A and 18B, As shown in FIG. 13, the helical blade 18C may be formed by integrally or integrally combining a thin metal plate 47 with a fluororesin 34 such as Teflon.

In this case, the helical blade 18C is disposed so that the metal plate 47 faces the low-pressure side compression chamber.
Make the metal surface of C a wear-resistant surface. As described above, the helical blade 18C is a combination of the resin material 48 such as Teflon and the metal plate 47, and the metal plate 47 is provided on the side of the low-pressure side blade that slides in contact with the helical groove 17, so that the wear resistance of the metal plate is reduced. At 47, the end face seal can be effectively performed with the resin material.

FIG. 14 shows another embodiment of a compressor employing a helical blade.

The compressor shown in this embodiment has an electric motor unit 11A and a compressor unit 12A arranged in the longitudinal direction of a closed casing 10A. Due to this arrangement structure, the compressor section 12A extends the roller piston 16 to one side, and the extension section 16a is provided with the rotor 14 of the electric motor section 11A, and the rotor 14 and the roller piston 16 rotate integrally. It is something to do.

The cylinder 15 of the compressor section 12A is supported by bearings 39a and 39b. This support structure may be supported so as to rotate integrally with the roller piston 16 or may be fixedly supported. Also in this case, the blades shown in FIGS. 8, 11, 12, and 13 are used for the helical blade incorporated in the compressor section 12A.

The other configuration is not substantially different from the compressor shown in FIG.

〔The invention's effect〕

As described above, in the compressor according to the present invention, the helical blade incorporated in the compressor section is formed of a fluororesin material filled with glass fiber, and the molded helical blade is exposed to hydrofluoric acid and exposed on the blade surface. When the glass fiber is dissolved and removed, the sliding of the helical blade sliding in the helical groove becomes smooth,
Since the wear of the helical groove can be prevented, the frictional resistance is reduced, and the deformation, breakage and wear of the helical blade are effectively prevented, and the durability and reliability can be improved.

Furthermore, the helical blade incorporated in the compressor section was formed and formed of a fluororesin material filled with glass fiber as a reinforcing material and at least one of a heat-resistant polymer material and a liquid crystal polymer as a wear-resistant material. Even when the blade is treated with hydrofluoric acid to dissolve and remove the glass fibers exposed on the blade surface, the sliding of the helical blade sliding in the helical groove becomes smooth and the wear of the helical groove can be prevented. In addition, the presence of a heat-resistant polymer material or liquid crystal polymer on the blade surface can suppress blade wear on the sliding surface, effectively preventing blade deformation, breakage and wear, and improving durability and reliability. Can be further improved.

When the helical blade is formed by combining a resin material and a metal plate, and the metal surface is made to be a wear-resistant surface, the elasticity of the resin material seals the blade end surface, and the metal plate slides with the helical groove. Abrasion resistance due to movement can be provided, and durability and reliability can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an embodiment of a compressor according to the present invention, FIG. 2 is a view showing a roller piston of a compressor unit incorporated in the compressor, and FIG. FIG. 4 is a longitudinal sectional view showing a compressor part of the compressor, FIG. 5 is a sectional view taken along the line V-V of FIG. 4, and FIG. 6 is a view showing the compressor part of the compressor. FIG. 7 is an enlarged view of part A of FIG.
The figure is a partial sectional view of a helical blade suitably used in the compressor section, FIG. 8 is a view showing a sectional shape of the helical blade shown in FIG. 7, and FIGS. 9 (A) to 9 (D). FIG. 10 is a view for explaining the compression action of the compressor of the present invention, FIG. 10 is a view for explaining the action of a helical blade provided in the compressor section, and FIGS. 11, 12, and 13 are incorporated in the compressor section. FIG. 14 shows a modification of the helical blade, and FIG. 14 is a longitudinal sectional view showing another embodiment of the compressor of the present invention. 10,10A …… Closed casing, 11,11A …… Electric motor part, 12,1
2A Compressor part, 13 Stator, 14 Rotor, 15
... Cylinder, 16 ... Roller piston, 17 ... Helical groove, 1818A, 18B, 18C ... Helical blade, 21 ... Working pin, 25 ... Working chamber, 31 ... Lubricant oil, 34 ... Fluorine resin material , 36 ...... Resin material, 40 ...... Glass fiber (reinforcing material), 45
…… Abrasion resistant material, 47 …… Metal plate, 48 …… Resin material.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsuo Fukuda 70, Yanagicho, Kochi-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Yanagicho Plant (72) Inventor: Noritsugu Kawashima 1-kogashi-Toshiba-cho, Koyuki-ku, Kawasaki-shi, Kanagawa Inside Toshiba Research Institute Co., Ltd. (72) Kazuhisa Tsunoda 1, Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Inside Toshiba Research Institute Co., Ltd. In-plant (56) References JP-A-50-143103 (JP, A) JP-A-60-238351 (JP, A) JP-A-60-17947 (JP, A) US Patent 2,527,536 (US, A) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) F04C 18/30-18/352 C08L 27/12 C08L 101/12 C08J 5/16 C08J 7/00 C08K 7/14 C29C 67/14 B29K 105: 12

Claims (3)

(57) [Claims] In a compressor having a compressor section housed in a closed casing, the compressor section includes a sleeve-shaped cylinder, a roller piston rotatably designated at an eccentric position in the cylinder, and a helical groove of the piston. A helical blade provided so as to be able to protrude and retract within the helical blade, the helical blade is formed of a fluororesin filled with glass fibers as a reinforcing material, and the glass fibers are dissolved and removed from the blade surface by hydrofluoric acid treatment A compressor characterized by the following. 2. A compressor having a compressor section housed in a closed casing, wherein the compressor section includes a sleeve-shaped cylinder, a roller piston rotatably designated at an eccentric position in the cylinder, and a helical groove of the piston. A helical blade provided so as to be able to protrude and retract within the helical blade, wherein the helical blade is a fluororesin filled with glass fiber as a reinforcing material and at least one of a heat-resistant polymer material and a crystalline polymer as a wear-resistant material, respectively. And a glass fiber dissolved and removed from the blade surface by hydrofluoric acid treatment. 3. A compressor in which a compressor section is housed in a closed casing, said compressor section comprising a sleeve-like cylinder, a roller piston rotatably indicated at an eccentric position in said cylinder, and a helical groove of said piston. A helical blade provided so as to be able to protrude and retract within the helical blade, wherein the helical blade is formed by combining a metal plate as a reinforcing material with a resin material such as a fluororesin or the like, and making the surface of the metal plate a wear-resistant surface. Compressor.