JPH01227896A - Closed type rotary compressor - Google Patents

Abstract

PURPOSE:To maintain the reliability of a compressor element and prevent the efficiency reduction due to oil discharge in a refrigeration cycle by forming a discharge pipe in connection to a refrigerant passage area defined by a notch on the external face of a stator and the internal face of a closed container. CONSTITUTION:A part of refrigerant compressed by a compressor element 8 is discharged from a refrigerant passage 10 to which a discharge pipe 1 opens, to a refrigeration cycle and the other part passes through both a refrigerant passage 10' and a clearance between a stator 4 and a rotor b to cool a motor element 6 and then discharged from the discharge pipe 1 to the refrigeration cycle via the refrigerant passage 10. Oil 2 inside a closed container 3 is dispersed by the revolution of the rotor 5, however, does not directly go to the discharge pipe 1 and mostly along the internal face of the closed container 3 and returns to the bottom part. As a result, sufficient oil 2 for lubrication of the friction part of the compressor element 8 may be ensured and the reduction in efficiency of the refrigeration cycle due to discharge of oil may be restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic rotary compressor constituting a refrigeration cycle.

2. Description of the Related Art Conventionally, as shown in FIG. 4, this type of hermetic rotary compressor is equipped with a discharge pipe 1 and a stator 4 and a rotor 5 inside a hermetically sealed container 3 in which oil 2 is stored at the bottom. It consisted of an electric motor element 6 and a compressor element 8 driven by the electric motor element 6 via a shaft 7.

With this configuration, the refrigerant compressed by the compressor element 8 is discharged from the closed container 3 through the discharge pipe 1 to a refrigeration cycle (not shown).

Problem to be Solved by the Invention However, in the configuration shown in FIG. 4, the refrigerant compressed by the compressor element 8 is directly discharged from the discharge pipe 1 to the refrigeration cycle (not shown) without cooling the motor element 6. As a result, the temperature of the motor element 6 increases, reducing reliability.

FIG. 5 shows another conventional example.

In the configuration shown in FIG. 5, the refrigerant compressed by the compressor element 8 is discharged from the discharge pipe 1 to the refrigeration cycle (not shown) after cooling the motor element 6, but the refrigerant is discharged from the motor element 6 side to the refrigeration cycle (not shown). A pressure difference is generated between the compressor element 8 side and the oil level of the oil 2 on the motor element 6 side, which becomes high.Furthermore, due to the rotation of the rotor 5, the oil 2 is scattered and discharged from the discharge pipe 1 during the refrigeration cycle (not shown). The amount of oil during the cycle increases, resulting in a decrease in the efficiency of the refrigeration cycle and a decrease in the amount of oil 2 in the closed container 3, causing poor lubrication of the sliding parts of the compressor element 8.

In view of the above problems, the present invention cools the electric motor element 6 with the refrigerant compressed by the compressor element 8, suppresses the discharge of the oil 2 into the refrigeration cycle, secures the oil 2 in the closed container a, and compresses the oil 2. This is intended to improve the reliability of the machine element 8 and to suppress a decrease in the efficiency of the refrigeration cycle due to oil discharge.

Means for Solving the Problems In order to solve the above problems, the hermetic rotary compressor of the present invention has a discharge pipe arranged in a refrigerant passage portion formed by a notch provided on the outer periphery of the stator and the inner periphery of the sealed container. It is something.

According to the above configuration, the present invention cools the electric motor element with the refrigerant compressed by the compressor element, and furthermore, the oil scattered by the rotation of the rotor is returned to the bottom of the sealed container along the inner circumference of the sealed container, and the oil is returned to the bottom of the sealed container, and the oil is returned to the bottom of the sealed container. This suppresses the amount of oil discharged from the

EXAMPLE Hereinafter, a hermetic rotary compressor according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a sectional view of the hermetic rotary compressor of the present invention.

In FIG. 1, reference numeral 3 denotes a closed container in which oil 2 is stored at the bottom. Inside the container, there is an electric motor element 6 composed of a stator 4 and a rotor 5, and the electric motor element 6 is driven via a shaft 7. Compressor elements 8 are each arranged. A discharge pipe 1 discharges the refrigerant compressed by the compressor element 8 to a refrigeration cycle (not shown).

Next, FIG. 2 is a sectional view taken along line A--A in FIG. 1.

In FIG. 2, the discharge pipe 1 opens into a refrigerant passage 10 formed by a notch 9 provided on the outer periphery of the stator 4 and the inner periphery of the closed container 3.

In the above configuration, a part of the refrigerant compressed by the compressor element 8 is directly discharged to the refrigeration cycle (not shown) from the refrigerant passage 10 in which the discharge pipe 1 is opened, and the rest is discharged to the other refrigerant passage 10. After cooling the electric motor element 6 through the gap between the stator 4 and the rotor 5, the refrigerant is discharged from the discharge pipe 1 through the refrigerant passage 10 to a refrigeration cycle (not shown).

Further, although the oil 2 in the closed container a is scattered by the rotation of the rotor 5, the oil droplets do not go directly to the discharge pipe 1, but mostly return to the bottom again along the inner circumference of the closed container 3. As a result, sufficient oil 2 for lubricating the sliding parts of the compressor element 8 can be secured in the closed container a, and furthermore, a decrease in the efficiency of the refrigeration cycle due to oil discharge can be suppressed.

Although the above embodiment has been described with respect to a horizontal rotary compressor, the same effect can be obtained with a vertical rotary compressor as shown in FIG. 3, and the height of the compressor can be reduced.

Effects of the Invention As described above, the present invention cools motor elements with a refrigerant by disposing a discharge pipe in a refrigerant passage portion formed by a notch provided on the outer periphery of a stator and an inner periphery of a closed container.
Furthermore, by suppressing the amount of oil discharged, the reliability of the compressor element can be ensured, and at the same time, a decrease in efficiency due to oil discharge of the refrigeration cycle can be suppressed.

In addition, with a vertical rotary compressor, it is possible to reduce the height of the compressor.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a hermetic rotary compressor according to an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view of a hermetic rotary compressor according to another embodiment of the invention. 4 and 5 are cross-sectional views of different conventional hermetic rotary compressors. 1...Discharge pipe, 6...Electric motor element, 8...
... Compressor element, 10 ... Refrigerant passage. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
11 Notes 11 reasons 6- Abandonment of food 8- Jiangm food system Fig. 2 10- Gyeongmu-gu Fig. 3

Claims (1)

[Claims] A hermetic rotary compressor is constructed by providing an electric motor element consisting of a stator and a rotor and a compressor element driven by the electric motor element in a hermetically sealed container, and compressing the airtight container by the compressor element. A hermetic rotary compressor that discharges the refrigerant discharged inside the hermetic container to the outside of the hermetic container from a discharge pipe provided in a refrigerant passage portion formed by a notch provided on the outer periphery of the stator and an inner periphery of the hermetic container.