JPH0629509Y2 - Horizontal rotary compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an improvement of a horizontal rotary compressor capable of cooling an electric element without impairing oil lubrication.

(B) Conventional technology A conventional horizontal rotary compressor is disclosed in, for example, Japanese Utility Model Publication No. 61-10359.
It is configured as shown in Japanese Patent Publication No. Here, a conventional example will be described with reference to this publication. In FIG. 3, reference numeral 50 denotes a motor chamber 54 in which an electric element 53 is accommodated by a partition plate 52 in a closed container 51 in which oil is stored at the bottom, and a rotary compression driven by a horizontal rotary shaft 55 of the electric element. The horizontal rotary compressor is divided into a pump chamber 57 in which the element 56 is housed. Reference numeral 58 is an oil supply pipe attached to the end of the rotary shaft 55 on the pump chamber 57 side. Reference numeral 59 denotes a bypass pipe for introducing the refrigerant discharged from the rotary compression element 56 out of the closed container 51 and then introducing the refrigerant into the motor chamber 54. The bypass pipe is attached to the rotor 60 of the electric element 53 in the motor chamber 54. The disc 61 is provided so that its opening is opposed to the disc 61. 62 is attached to the closed container 51 and is attached to the pump chamber 5
It is a discharge pipe that opens inside 7.

In the horizontal rotary compressor of this structure, after the refrigerant compressed by the rotary compression element 56 is guided to the motor chamber 54 by the bypass pipe 59, the pump is passed from this motor chamber through the gap between the partition plate 52 and the inner wall of the hermetic container 51. Lead to chamber 57, discharge pipe 62
Is discharged from the container to the outside of the closed chamber 51, and the electric element 53 is cooled by the refrigerant introduced into the motor chamber 54, and the partition plate 52 makes the pressure in the motor chamber 54 higher than that in the pump chamber 57. The oil level is raised so that the amount of oil pumped up from the oil supply pipe 58 can be secured, and stable operation is performed.

(C) Problems to be Solved by the Invention However, the conventional horizontal rotary compressor 50 has the pump chamber 5
Since the oil level in 7 is raised and a bypass pipe 59 is attached outside the closed container 51 to cool the electric element 53, the refrigerant compressed by the rotary compression element 56 is guided into the motor chamber 54. However, there is a problem that the structure becomes complicated and the size becomes large.

This invention solves the above-mentioned problem, and makes it possible to raise the oil level of the pump chamber by the refrigerant compressed by the rotary compression element and cool the electric element without providing a bypass pipe outside the closed container. It is intended to do so.

(D) Means for Solving the Problems This invention provides a partition plate for partitioning the sealed container so as to communicate with each other between the rotary compression element and the electric element, and the rotary plate opening to the electric element side in the partition plate. Providing a discharge port for the compression element,
And, the discharge pipe that opens into the closed container on the side of this rotary compression element is attached to this closed container, and a disk is attached to the end surface of the rotor of the electric element on the side far from the rotary compression element. There is a gap between them.

Further, this invention provides a hole penetrating in the axial direction at the center of the rotary shaft, attaches an oil supply pipe that opens into the oil in the oil sump to one end of the rotary shaft on the rotary compression element side, and installs the other end on the electric element side. It is opposed to the disc attached to the rotation hole.

(E) Action Due to the configuration of the present invention as described above, the disc mounted on the end face of the rotor on the side far from the rotary compression element is compressed by the rotary compression element and discharged into the closed container on the electric element side. A part of the refrigerant discharged from the inside of the closed container on the rotary compression element side to the discharge pipe through the partition plate is made to flow to the electric element, so that the electric element can be cooled without using a special external pipe. It was done.

(F) Embodiment Hereinafter, the present invention will be described based on an embodiment shown in FIGS. 1 and 2.

Reference numeral 1 denotes a closed container having an oil reservoir 2 in the bottom of which oil is stored, in which an electric element 3 and a rotary compression element 5 driven by a horizontal rotary shaft 4 of the electric element are housed. There is. Reference numeral 6 denotes a partition plate, which is partitioned into an inside of the closed container 1, a motor chamber 7 for housing the electric element 3, and a pump chamber 8 for housing the rotary compression element 5. The electric element 3 is composed of a stator 9 and a rotor 11 inserted into the rotating shaft 4 through an air gap 10 inside the stator 9. The stator 9 has a built-in winding 13 having coil ends 12 protruding at both ends. The rotor 11 is provided with end rings 14 at both ends. The rotary compression element 5 includes a cylinder 15, a roller 17 that rotates in the cylinder 15 by the eccentric portion 16 of the rotary shaft 4, and a vane 18 that contacts the roller 17 and divides the cylinder 15 into a high pressure chamber and a low pressure chamber.
And side frame members 19 and 20 for closing the opening of the cylinder 15.
And a cup muffler 21 attached to the side frame body 20 on the side far from the electric element 3. The partition plate 6 is attached to the side frame body 19 on the electric element 3 side to form a gap 22 with the inner wall of the closed container 1. The partition plate 6 has a discharge port 2 that opens to the motor chamber 7 and communicates with the cup muffler 21 via a communication hole 23 provided in the cylinder 15.
4 are provided. An oil supply hole 25 is provided at the center of the rotary shaft 4 so as to penetrate therethrough in the axial direction. An oil supply pipe 26, which opens into the oil in the oil reservoir 2 and is attached to the cup muffler 21, is provided at the end surface of the rotary shaft 4 on the pump chamber 8 side so as to communicate with the oil supply hole 25. Reference numeral 27 denotes a disc attached to the end ring 14 of the rotor 11 on the side far from the rotary compression element 5. This disc provides a gap between the end face of the end ring 14 and the coil end 12 of the winding 13. Located inside. At the center of the disc 27, the oil supply hole 2 of the rotary shaft 4 is provided.
5 is provided with a pin 28 that is loosely inserted. Two
A discharge pipe 9 is attached to the closed container 1 so as to open into the pump chamber 8.

In the horizontal rotary compressor thus configured, the refrigerant flowing into the cylinder 15 is compressed by the cooperation of the roller 17 and the vane 18, and is discharged into the cup muffler 21. The refrigerant in the cup muffler is discharged into the motor chamber 7 through the communication hole 23 and the discharge port 24 of the partition plate 6. The refrigerant in the motor chamber flows into the pump chamber 8 through the gap 22 between the partition plate 6 and the inner wall of the closed container 1, and is discharged from the pump chamber to the outside of the closed container 1 through the discharge pipe 29.

The oil in the oil sump 2 is compressed by the rotary compression element 5, and the refrigerant flowing from the motor chamber 7 to the pump chamber 8 becomes a gap 22 in the partition plate 6.
The pressure in the motor chamber 7 becomes higher than that in the pump chamber 8 when passing through the space, so that a pressure difference flows from the motor chamber 7 to the pump chamber 8 through the gap 22 in the lower part of the partition plate 6, The oil level is higher than that of the motor chamber 7. The oil level of the pump chamber 8 of the oil supply pipe 26 is raised so that the oil can be reliably supplied to the oil supply hole 25 of the rotary shaft 4 and the sliding portions are lubricated.

The disk 27 attached to the end ring 14 of the rotor 11 is rotated by this rotor, thereby rotating the refrigerant in the vicinity of the disk 27 in contact therewith and blowing it to the coil end 12 by the centrifugal force. The pressure of the part is reduced. Then, a part of the refrigerant discharged from the discharge port 24 to the motor chamber 7 flows through the air gap 10 of the electric element 3 to the low pressure portion of the disc 27. Therefore, the refrigerant flows from the air gap 10 to the outer periphery of the stator 9 so as to circulate through the electric element 3, thereby effectively cooling the electric element. Further, the electric element 3 is cooled by the refrigerant so that the temperature of the oil in the oil reservoir 2 in which the electric element is submerged does not rise so much.

A pin 28 is inserted into the oil supply hole 25 of the rotary shaft 4 in a loose fitting manner.
By communicating with the low pressure portion of the disc 27 through the gap of, the pressure becomes lower than that in the closed container 1, and the oil sump 2
The above oil is supplied from the oil supply pipe 26.

According to the present invention, the disk 27 is attached to the rotor 11 on the side far from the rotary compression element 5, so that the refrigerant compressed by the rotary compression element 5 can be provided outside the closed container 1 without a bypass pipe.
The refrigerant is allowed to flow so that the electric element 3 in the motor chamber 7 can be effectively cooled.

(G) Effect of the Invention According to the present invention, the electric element can be effectively cooled by the refrigerant discharged from the rotary compression element without providing a bypass pipe outside the closed container, and the oil temperature rises. And the oil level in the pump chamber can be kept high to prevent poor lubrication. In addition, a combination of disc and pin can give a kind of throttling function, keep the pressure in the through hole lower than the pressure in the closed container, and reliably maintain the pressure difference between the inlet and outlet of the oil supply pipe. The oil rising performance of the oil supply pipe can be improved.

[Brief description of drawings]

1 and 2 show the present invention, FIG. 1 is a cross-sectional view of a horizontal rotary compressor, FIG. 2 is an enlarged cross-sectional view of an essential part showing a state in which a disc is attached, and FIG. 3 is a conventional horizontal type. It is sectional drawing which shows a rotary compressor. 1 ... Airtight container, 2 ... Oil sump, 3 ... Electric element, 4
...... Rotary shaft, 5 ... Rotary compression element, 6 ... Partition plate, 7 ...
… Motor room, 8… Pump room, 11… Rotor, 22…
... Gap, 24 ... Discharge port, 25 ... Oil supply hole, 26 ... Oil supply pipe, 27 ... Disc, 28 ... Pin, 29 ... Discharge pipe.

Claims (1)

[Scope of utility model registration request] 1. A closed container having an oil reservoir at the bottom, and an electric element and a rotary compression element housed in the container, the electric element being a stator and a rotary member arranged inside the stator. The rotary compression element is composed of a child and a horizontal rotary shaft that is inserted into the center of the rotor and has a through hole in the axial direction. A partition plate is attached to the pump chamber in which the elements are housed, and an oil supply pipe extending downward in the pump chamber is provided at one end of the rotary shaft, and the refrigerant compressed by the rotary compression element is pumped from the motor chamber to the pump chamber. In the horizontal rotary compressor being discharged to the outside of the hermetically sealed container via, the rotary compression element is provided with a discharge hole facing the electric element, and the end face of the rotor on the side far from the rotary compression element is provided. Circle facing the through hole of the rotating shaft Together it is attached to a horizontal rotary compressor, wherein a pin is loosely fitted into the through hole of the rotary shaft is provided on the disc.