JPH03538Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention relates to a hermetic electric compressor (prior art) An example of a conventional hermetic electric compressor is shown in FIGS. 3 to 5, A compressor element A and a motor element B for driving the compressor element A are housed in a sealed housing 10, and lubricating oil is stored at the inner bottom of the sealed housing 10. The compressor element A is composed of a cylinder 5, an upper bearing 3, a lower bearing 4, a rotor 2, a partition plate 6, a spring 7, a discharge valve 15, a discharge valve cover 21, etc., and the electric motor element B is composed of a motor stator 8, a motor rotor. It is composed of 9 etc. A motor rotor 9 is fixed to the upper part of a crankshaft 1 which is supported by an upper bearing 3 and a lower bearing 4, and by energizing the electric element B, the crankshaft 1 rotates, and by causing the rotor 2 to move eccentrically within the cylinder 5. Gas is sucked into the cylinder volume 5' and compressed. The suction gas enters the cylinder volume 5' through the accumulator 11 and the suction pipe 12, where it is compressed to become high-pressure gas, and the discharge valve 1
5, the discharge valve chamber 23, the discharge gas passage 24, the discharge muffler 20, the discharge gas passage 17, and the discharge pipe 18 to the outside of the compressor. On the other hand, the lubricating oil is normally filled up to around the oil level 19, and is sucked by the oil pump 14 through the lubricating oil suction port 13, and the rotor 12,
Lubricate the upper and lower bearings 3 and 4.

(Problems to be solved by the invention) In the conventional compressor mentioned above, the gas discharged from the cylinder volume 5' contains a mist of lubricating oil, and this discharged gas passes through the discharge muffler 20 as shown in the white line in FIG. As shown by the drawing arrow, the discharge gas passes between the coil 8a of the motor stator 8 and the discharge muffler 20 and inside the coil 8a, passes through the discharge gas passage 17 provided close to the inner peripheral wall of the sealed housing 10, and is discharged. It is sent from the pipe 18 to an air conditioning unit (not shown). Therefore, the discharged gas is discharged without sufficiently separating the lubricating oil, which increases the amount of oil that not only significantly deteriorates the performance of the air conditioning unit but also accumulates in the sealed housing 10. There was a problem in that the amount of lubricating oil decreased, causing poor lubrication of compressor elements.

(Means for Solving the Problems) The present invention has been proposed to address the above problems, and its gist consists of a sealed housing, a compressor element housed in the sealed housing, and a compressor element housed in the sealed housing. An electric motor element includes a motor stator and a motor rotor that drive a compressor element,
Gas discharged from the compressor element passes through a discharge muffler fixed to the compressor element, passes through a discharge gas passage provided close to the inner peripheral wall of the hermetic housing, and is discharged from the discharge pipe to the outside of the hermetic housing. In the hermetic electric compressor, the motor stator is configured to pass through a shielding plate that shields the discharged gas passing between the motor stator and the discharge muffler and guides the discharged gas to the coil side of the motor stator, and the coil of the motor stator. A hermetic electric compressor is characterized in that it is provided with an oil removal liquid that shields discharged gas and separates oil in the discharged gas.

(Example) Fig. 1 is a vertical cross-sectional view showing the main parts of the present invention.
is a shielding plate erected on the upper surface of the discharge muffler 20 fixed to the compressor element A, and shields the discharge gas passing between the coil 8a of the motor stator 8 and the discharge muffler 20; This is an oil removal plate that is attached and extends downward. Note that the other configurations are the same as those of the conventional one shown in FIGS. 3 to 5, and corresponding members are given the same reference numerals and explanations thereof will be omitted. After exiting the discharge muffler 20, the discharged gas containing mist of lubricating oil collides with a shielding plate 30 having holes 30a for discharging the oil, separating the lubricating oil, and then flowing into the coil 8a. All of the discharged gas that has passed through the coil 8a collides with the deoiling plate 31, and the lubricating oil separated by this collision falls along the deoiling plate 31 under its own weight, and only the gas is discharged through the discharged gas passage 17. The tube 18 is reached.

However, by providing the shielding plate 30 and the oil removal plate 31, the discharged gas containing mist-like lubricating oil does not pass between the discharge muffler 20 and the coil 8a, but all passes through the coil 8a and becomes the discharged gas. Since the mist-like lubricating oil contained therein is captured by the oil removing plate 31, the lubricating oil is not discharged together with the discharge gas discharged from the discharge pipe 18.

As shown in FIG.
2 is installed and a hole 32a for discharging oil is bored in this deoiling plate 32, the discharged gas that has passed through the coil 8a of the motor stator 8 and collided with the deoiling plate 31 will be discharged from the oil surface of the lubricating oil. Since it does not directly hit the oil level 19, the oil level 19 is not disturbed.

Although a compressor element including a rolling piston type compressor element has been described above, the compressor element can be of various types such as a scroll type and a vane type.

(Operations and Effects of the Invention) In the present invention, a shield plate shields the discharge gas passing between the motor stator and the discharge muffler and guides the discharge gas to the coil side of the motor stator, and a shield plate shields the discharge gas passing through the coil of the motor stator. Since a deoiling plate is installed to separate the oil in the discharged gas, the discharged gas containing mist of lubricating oil is guided by the shielding plate, guided to the coil of the motor stator, and passed through it. All of the discharged gas that has passed through the coil collides with the oil removing plate, so that the mist of lubricating oil contained in the discharged gas is separated and falls upon collision. Therefore, only gas is exhausted from inside the sealed housing and oil is prevented from rising, so there is no reduction in the performance of the air conditioning unit as with conventional systems, and the amount of lubricating oil inside the sealed housing does not decrease. Therefore, there is no possibility of poor lubrication of the compressor elements.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of the main part showing one embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the main part showing another embodiment of the invention, and Fig. 3 is a conventional hermetic electric compressor. 4 is a sectional view taken along the - line of FIG. 3,
FIG. 5 is a sectional view taken along the - line in FIG. 4. Sealed housing...10, Compressor element...A,
Motor elements...B, Motor stator...8, Coil...8a, Motor rotor...9, Discharge muffler...
...20, Discharge gas passage...17, Shielding plate...3
0. Oil removal plate...31.

Claims (1)

[Scope of utility model registration request] The compressor element includes an airtight housing, a compressor element housed in the airtight housing, and an electric motor element consisting of a motor stator and a motor rotor for driving the compressor element, and the gas discharged from the compressor element is fixed to the compressor element. In the hermetic electric compressor, the hermetic electric compressor is configured such that the gas is discharged from the discharge pipe to the outside of the hermetic housing through a discharge muffler, a discharge passage provided close to an inner circumferential wall of the hermetic housing, and a discharge pipe. A shielding plate that shields the discharged gas passing between the discharge muffler and guides the discharged gas to the coil side of the motor stator, and a shield plate that shields the discharged gas that has passed through the coil of the motor stator and separates the oil in the discharged gas. A hermetic electric compressor characterized by the provision of an oil plate.