JPS6141995Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention relates to a horizontal rotary compressor, and particularly to improvements in cover members for the muffling chamber and blade chamber.

(Prior technology) Conventionally, valve covers have been installed to muffle the discharge gas noise of rotary compressors, but it is almost impossible to increase the volume and number of stages using only such valve covers. Therefore, the sound deadening effect was small.

Therefore, for example, a method was developed in which a silencing chamber was formed outside the cylinder chamber of the cylinder body.
This is shown in Publication No. 50-55611, etc.

On the other hand, in a horizontal rotary compressor, since the crankshaft is located above the lubricating oil level,
A blade chamber is formed at the back of the blade of the compressor, and a blade oil pump is configured that utilizes the reciprocating motion of the blade to supply oil to the sliding parts.

The muffling chamber and the blade chamber are sealed by making the main bearing and sub-bearing, which are disposed on both sides of the cylinder body and form the cylinder chamber, large in diameter or protrude in the radial direction.

(Problem that the invention attempts to solve) However, the main bearing and sub-bearing have relatively thick walls to increase their rigidity in order to support the crankshaft, so as the diameter increases, the weight increases. In addition, due to the large diameter, the flatness of the cylinder chamber forming surface, which requires high accuracy, deteriorates, and the sealing performance of the cylinder chamber decreases, resulting in a decrease in compression efficiency.

This idea was made in view of the above points,
To provide a horizontal rotary compressor capable of sealing a silencing chamber and a blade chamber without increasing the diameter of a main bearing and a sub-bearing, and minimizing a reduction in volume of the silencing chamber. The purpose is to

[Structure of the idea]

(Means and operations for solving the problems) A horizontal rotary compressor according to the present invention houses a motor and a compression device connected by an output shaft in a sealed case in which lubricating oil is stored at the bottom. In a horizontal rotary compressor, a silencing chamber is formed outside a cylinder chamber of a cylinder body of a compression device, and a blade chamber constituting a blade oil pump is formed at the back of a blade. A main bearing rig and a sub-bearing that form the cylinder chamber and are provided with a valve cover that communicates the cylinder chamber and the muffling chamber are formed to have a small diameter so as to be located inside the muffling chamber and the blade chamber, and The silencing chamber and the blade chamber are sealed with a pair of annular cover members, and by sealing the silencing chamber and the blade chamber with a cover member that can be formed from a thin plate without using both bearings, both bearings can be sealed. can be prevented from increasing in size. Furthermore, compared to the case where the silencing chamber and blade chamber are sealed with separate members, there are fewer fixing points, so the space for fixing on the outside of the cylinder body can be reduced, and as a result, the volume of the silencing chamber can be reduced. It is possible to secure a large amount of noise, increasing the noise reduction effect.

(Example) Hereinafter, the present invention will be explained with reference to an example shown in the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a sealed casing equipped with a refrigerant suction pipe 2 and a discharge pipe 3, and a motor 6 consisting of a rotor 4 and a stator 5 is built into this sealed casing 1. A rotary type compression device 8 is provided on the output shaft 7 of the rotor 4. This compression device 8 includes a cylinder body 9, a valve cover 10
It is composed of a main bearing 11 and a sub-bearing 12.

That is, in the compression device 8, a crankshaft 15 having a roller 14 inserted into the cylinder chamber 13 of the cylinder body 9 is directly connected to the output shaft 7, and the valve cover is attached to one side of the cylinder body 9. 10, and a sub-bearing 12 is attached to the other side of the cylinder body 9 and fixed with a bolt (not shown). Furthermore, a blade 1 disposed in the cylinder body 9 is pressed against the roller 14 by the elasticity of a spring 20.
A blade chamber 18 constituting a blade oil pump 16 is formed on the back of the cylinder body 9, and a plurality (three) of muffling chambers formed by arc-shaped casting holes are formed on the outside of the cylinder chamber 13 of the cylinder body 9. 21 are provided, and each of the silencing chambers 21 is communicated with each other through a communication hole 22.

The positions of the muffling chamber 21 and the blade chamber 18 are similar to the main bearing 11 and the sub-bearing 12.
It is formed so that it is located outside the outer diameter of. That is, the outer diameters of the main bearing 11 and the sub-bearing 12 are formed to be smaller than the positions of the muffling chamber 21 and the blade chamber 18, which are arcuate. Further, a pair of cover members 23 made of annular plates are provided at both openings of the silencing chamber 21 so as to cover them, and both cover members 23 have a plurality of holes that also serve as refrigerant circulation holes. It is fixed by pipe rivets 24. Further, an oil supply pipe 17 is attached to the cover member 23, and this oil supply pipe 17 is connected inside the output shaft 7 to supply lubricating oil 28 to each sliding portion.

According to the above-described configuration, the refrigerant compressed by the compression device 8 is discharged into the valve cover 10 to be muffled, and is guided from inside the valve cover 10 through a passage (not shown) into the muffling chamber 21, thereby providing even better performance. After that, the sub bearing 12
It flows out into the cabin 25 from a discharge hole (not shown). Then, this compressed refrigerant is transferred to the pipe rivet 2.
4 and is discharged to the discharge pipe 3 via the cabins 26 and 27. Further, the oil supply is suitably carried out by a blade oil pump 16 via an oil supply pipe 17 to each sliding part.

In addition, in the embodiment described above, the cover member 2
Although the valve cover 3 has been described as being independent, it may be formed integrally with the valve cover 10 or the like, for example. Further, the shape of the cover member 23 is not limited to an annular shape, but may be a C-shape or another shape.

[Effect of idea]

As described above, in the horizontal rotary compressor according to the present invention, the main bearing and sub-bearing forming the cylinder chamber are located inside the silencing chamber and the blade chamber formed outside the cylinder chamber. Since it is formed to have a small diameter and the silencing chamber and blade chamber are sealed with an annular cover member, there is no need to increase the diameter of the main bearing and sub-bearing, and therefore, it is possible to use a relatively thin plate. By providing a cover member that can be formed, it is possible to reduce the weight of the compressor. In addition, since both bearings have a small diameter, it is possible to prevent deterioration of the flatness of the cylinder chamber forming surface and to prevent a decrease in compression efficiency. Compared to sealing each chamber with a separate member, there are fewer fixing points, so the space for fixing can be reduced and the volume of the silencing room can be increased, making it possible to It is highly effective.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the horizontal rotary compressor according to the present invention, FIG. 2 is a side view of a corresponding portion taken along the line - in FIG. 1 and with the cover member removed, and FIG. The figure is an enlarged partial sectional view of a part of FIG. 1, and FIG. 4 is a longitudinal sectional view of the tube rivet of FIG. 3. 1... Sealed casing, 6... Motor, 8...
Compressor, 9... Cylinder body, 10... Valve cover, 11... Main bearing, 12... Sub bearing, 13... Cylinder chamber, 18... Blade chamber, 19... Blade, 21... Silence chamber, 23
...Cover member, 24...Pipe rivet.

Claims (1)

[Scope of utility model registration request] A motor and a compression device connected by an output shaft are housed in a sealed case with lubricating oil stored at the bottom. In a horizontal rotary compressor forming a blade chamber constituting a blade oil pump, a main body comprising a valve cover disposed on both sides of the cylinder body forming the cylinder chamber and communicating the cylinder chamber and the muffling chamber. A horizontal rotation characterized in that a bearing and a sub-bearing are formed to have a small diameter so as to be located inside the silencing chamber and the blade chamber, and the silencing chamber and the blade chamber are sealed with a pair of annular cover members. compressor.