JP3301836B2 - Internal high pressure compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal high-pressure compressor used in refrigerators, air conditioners and the like.

[0002]

2. Description of the Related Art Generally, a compressor for a refrigerator or an air conditioner has the following structure.

That is, an electric element is accommodated on the upper side in a closed container, and a rotary compression element driven by this electric element is accommodated on a lower side. The electric element includes a stator having a winding and a rotor provided inside the stator. The rotary compression element has a cylinder, a roller rotated along the inner wall of the cylinder by an eccentric portion of the rotation shaft, and a pressure contacting surface of the roller to partition a compression chamber in the cylinder into a suction side and a discharge side. And a vane pressed by a spring
It comprises an upper bearing and a lower bearing that seal the opening of the cylinder and support the rotating shaft.

Then, the high-pressure gas compressed by the rotary compression element is once discharged into the closed container and then discharged to an external refrigerant circuit. (See, for example,
No. 271491).

[0005]

However, according to the structure described above, the suction gas intake passage formed in the cylinder is formed by simply machining a hole in a cylinder made of casting, while the cylinder is provided with a discharge gas. Therefore, the suction gas flowing into the suction passage is heated and diluted, and is introduced into the compression chamber in a low concentration state. For this reason, there is a problem that the refrigerating capacity is reduced and the coefficient of performance is deteriorated.

The present invention solves the above problems,
Aims to improve the refrigeration capacity and coefficient of performance by preventing the intake gas flowing into the intake passage from heating and suppressing the dilution of the intake gas, and by supplying a highly concentrated gas to the compression chamber. It is.

[0007]

According to the present invention, an electric element and a compression element are housed in a closed container, and a pipe made of a heat insulating material is attached to a suction passage of the compression element. inside a high-pressure compressor of a structure of the high-pressure gas is discharged into the sealed containers, the pipe, and the bent portion molded by folding back one end portion to the outside, and a rib protruding shaped intermediate portion to the outer Is the entire circumference of the pipe
It is formed integrally with the substrate .

[0008]

According to the present invention having the above-described structure,
Because a pipe of heat insulating material is provided in the suction passage,
The refrigerating capacity and the coefficient of performance can be improved by preventing the intake gas flowing into the intake passage from being heated, thereby suppressing the dilution of the intake gas, and supplying the concentrated gas to the compression chamber.
In addition, since the pipe has a bent portion at an end thereof and a rib formed at an intermediate portion thereof, the pipe is in close contact with a hole of the suction passage to securely fix the pipe and resonate. In addition to preventing the suction gas from leaking out of the pipe, the above-described action of preventing the suction gas from being heated can be promoted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

A is a rotary compressor of internal high pressure type,
1 is a closed container, in which an electric element 2 is provided on the upper side,
On the lower side, a rotary compression element 3 driven by this electric element
Are stored respectively. The electric element 2 includes a stator 5 having a winding 4 insulated with an organic material and a rotor 6 provided inside the stator. Rotary compression element 3
And a roller 10 which is rotated along the inner wall of the cylinder 7 by an eccentric portion 9 of the rotary shaft 8 and is pressed against the peripheral surface of the roller so as to partition the inside of the cylinder 7 into a suction side and a discharge side. Vane pressed by spring (not shown)
And an upper bearing 11 and a lower bearing 12 that seal the opening of the cylinder 7 and support the rotating shaft 8.

The upper bearing 11 is provided with a discharge hole 13 communicating with the discharge side of the cylinder 7. Further, a discharge valve 14 for opening and closing the discharge hole 13 and a discharge muffler 15 are attached to the upper bearing 11 so as to cover the discharge valve.

The cylinder 7 is a casting, and the roller 10 and the vane are formed of an iron-based material.

The bottom of the closed container 1 is made of a raw material obtained by polymerizing a trivalent or higher polyol such as trimethylolpropane or pentaerythritol and a linear or side chain alkyl fatty acid without a catalyst. An oil of a polyol ester oil having a viscosity of −50 ° C., a liquid separation temperature of −30 ° C., a total acid value of 0.01 mg KOH / g or less, a viscosity of 32 cst at 40 ° C., and a viscosity index of 95 is stored.

To this polyol ester oil, 0.3% by weight of a phenolic antioxidant of 2,6-di-tert-butylparapresole (DBPC) is added as an additive in order to prevent oxidative deterioration during long-term storage. And
For the purpose of preventing hydrolysis, 0.25 wt% of an epoxy-based additive is added.

The rotary compressor A is filled with a fluorinated hydrocarbon-based refrigerant containing no chlorine, for example, R134a.

The oil lubricates the sliding surface between the roller 10 which is a sliding member of the rotary compression element 3 and the vane.

A suction pipe 16 is mounted on the closed vessel 1 and guides the refrigerant to a suction passage 17 of the cylinder 7. A suction pipe 18 is mounted on the upper wall of the closed vessel 1 and is compressed by the rotary compression element 3 to the desuperheater 19. A discharge pipe that once discharges and cools, and then discharges the refrigerant to the outside of the closed container 1 via the electric element 2.

Reference numeral 20 denotes a pipe made of a synthetic resin material or a heat-insulating metal material pressed into the suction passage 17. This pipe has a bent portion 21 formed by bending one end outward, and a rib 2 formed by projecting an intermediate portion outward.
2 are integrally formed.

In the rotary compressor A thus configured, the refrigerant R134a flowing from the suction pipe 16 to the suction side in the cylinder 7 is compressed by the cooperation of the roller 10 and the vane, and passes through the discharge hole 13. The discharge valve 14 is opened and discharged into the discharge muffler 15. The refrigerant in the discharge muffler is once led to a desuperheater 19 outside the device and cooled, and then discharged through the air gap of the electric element 2 to the discharge pipe 18.
From the closed container 1. Then, the oil is supplied to the sliding surface of the sliding member such as the roller 10 and the vane of the rotary compression element 3 to perform lubrication. Further, the refrigerant compressed in the cylinder 7 is prevented from leaking to the low pressure side.

Here, since the suction passage 17 is provided with the pipe 20 made of a heat insulating material, the heating of the suction gas flowing into the suction passage 17 is suppressed, the dilution of the suction gas is reduced, and the compression of the suction gas is reduced. By supplying a gas having a high concentration to the chamber, the refrigeration capacity and the coefficient of performance can be improved. Further, since the bent portion 21 is formed at the end of the pipe 20 and the rib 22 is formed at the middle portion thereof, the pipe is tightly fitted in the hole of the suction passage 17 to securely connect the pipe 20. It is possible to prevent the resonance by preventing the suction gas from leaking out of the pipe 20, thereby promoting the above-described action of preventing the suction gas from being heated.

[0021]

As described above, according to the present invention, since a pipe made of a heat insulating material is provided in the suction passage, the suction gas flowing into the suction passage is prevented from being heated and the suction gas is diluted. The refrigerating capacity and the coefficient of performance can be improved by suppressing the concentration and supplying a gas having a high concentration to the compression chamber. Also,
Since the pipe has a bent portion at an end thereof and a rib at an intermediate portion thereof, the pipe is tightly fixed in a hole of the suction passage to securely fix the pipe to prevent resonance. At the same time, it is possible to prevent the suction gas from leaking out of the pipe, and to promote the above-described action of preventing the suction gas from heating.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rotary compressor showing one embodiment of the present invention.

FIG. 2 is a sectional view of a pipe.

[Explanation of symbols]

 Reference Signs List A rotary compressor 1 closed container 3 rotary compression element 10 roller 16 suction pipe 17 suction passage 20 pipe 21 folded portion 22 rib

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-81592 (JP, A) JP-A-5-248582 (JP, A) JP-A-4-30291 (JP, U) 2436 (JP, B2) JP 5-61510 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04B 39/12 101 F04C 29/00

Claims (1)

(57) [Claims] 1. A closed vessel containing an electric element and a compression element, and a pipe made of a heat-insulating material mounted in a suction passage of the compression element, and the high-pressure gas compressed by the compression element is supplied to the closed vessel. inside a high-pressure compressor of the structure to be released within, the pipe includes a bent portion molded by folding back one end portion to the outside, and a rib protruding shaped intermediate portion outwardly, said path
An internal high-pressure compressor characterized by being integrally molded around the entire circumference of the pipe .