JPS5990785A - Coolant compressor - Google Patents

Abstract

PURPOSE:To reduce noises produced during operation of a compressor and to raise the efficiency of operation, by reducing the volume of a space filled with gas by charging many balls in the space formed between a compressor section and an enclosed case. CONSTITUTION:When a rotor 3b is set into rotation by passing current to a motor section 3, a rotary piston 8 is turned by a crank shaft 6 and coolant gas drawn into a compression chamber 11 from an intake pipe 19 is compressed along with rotation of the piston 8. The compressed gas is once discharged into a space 17a in an enclosed case 2 via a discharge valve 9c and then carried to a refrigerating cycle via an inner discharge pipe 18a. Here, many balls 17 made of a material having a lower specific weight than oil are charged in the space 17a formed in the enclosed case 2 on the side of a compressor section, and coolant gas discharged from the discharge valve 9c via a discharge hole 9b is carried to the inner discharge pipe 18a through the gaps formed between the balls 17. With such an arrangement, it is enabled to reduce the volume of the space filled with discharged gas and to attain the required objects.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a refrigerant compressor used in refrigeration equipment such as refrigerators and air conditioners, and relates to a technique for reducing the space volume within the shell.

Conventional Structure and Problems Conventionally, in a horizontal compressor a as shown in FIG. 1, a shell internal space volume C exists around an oil pump b. Therefore, (1) Even if the compressor is started, it takes time for the evaporator 75 balls to cool down because gas does not flow to the refrigeration system due to the gas being accumulated in the space and becoming high pressure. @ When the compressor stops, a large amount of gas accumulated in this space flows into the evaporator and raises the temperature, which reduces the efficiency of the refrigeration system by 4.00 During the operation of the compressor, a resonance phenomenon occurs in this space. However, they had drawbacks such as high noise levels during exercise.

Purpose of invention The present invention is to reduce the space mentioned above.

Structure of the invention.

In order to achieve this object, a large number of balls are filled in the space between the compression mechanism and the sealed case, thereby reducing the space filled with gas. In the figure, 1 is a refrigerant compressor main body, and an electric motor part 3 and a rotary compression mechanism part 4 are integrated and housed in a sealed case 2. Tetsuru. 3a is a stake of the electric motor, which is press-fitted into the sealed case 2 and fixed thereto.

3b is a rotor. Reference numeral 5 designates a side plate that integrally includes a main bearing 5a that pivotally supports a crankshaft 6 press-fitted into the rotor 3b. This side plate 5 has a circular disk shape and small holes 5b and 6c communicating with the stator 3a (1111).
is the provision. This side plate 6 is lightly press-fitted into the closed case 2 and then fixed by welding or the like. 7 is the crankshaft 6
A cylinder plate 09 that houses the rotating piston 8 provided on the eccentric portion 6a of the cylinder plate 09 is a bearing 9 that pivotally supports the crankshaft 6.
It is a side plate that integrally has a gas discharge hole 9.
b and a discharge valve 9C.

The aforementioned side plate 5, cylinder plate 7, and side plate 9 are integrated by a cylinder 10 to define a compression chamber 11. 12 is a vane that divides the compression chamber 11 into a high pressure side and a low pressure side, and 12a is a vane spring. Reference numeral 13 denotes an oil guide tube that is aligned with the bearing 9a by a bolt 10, and a mounting base 13a that fits into the bearing 9a.
It curves downward and consists of ft oil W13b.

The upper end of the oil pipe 13b is connected to the crankshaft 6 of the mounting base 13a.
The lower end is immersed in oil 14 stored below the sealed case 2, and has an oil pump mechanism 15, 16 inside. Balls 17 are made of a material having a specific gravity smaller than that of oil, such as polybutylene terephthalate, and are filled in large numbers so as to float on top of the oil 14 and fill the space 17a on the compression mechanism side of the sealed case 2 as shown in the figure. The diameter of this ball 17 is larger than that of the small holes sb and sc, and is set so that it will not enter the motor section 3 side. Dimension 18 is a discharge pipe that guides the discharge gas to the refrigeration cycle (not shown), and the inner diameter is larger than the diameter of the ball 17. After the ball 17 is inserted through the discharge pipe, the inner diameter of the discharge pipe is inserted to prevent the ball 17 from flowing out. 18
a is arranged. 18b is a filter attached to the discharge inner pipe 18a. 19 is a suction pipe that directly communicates with the compression chamber 11.

In this configuration, when the electric motor unit 3 is energized and the rotor 3b rotates, the crankshaft 6 rotates and the refrigerant gas sucked into the compression chamber 11 from the suction pipe 19 is compressed by the rotation of the rotating piston 8, and the discharge valve 9C Closed case 2
The liquid is once discharged into the inner space 17a, passes through the discharge inner pipe 18a, and is sent to the refrigeration cycle. At this time, the frozen gas discharged from the discharge valve 9C via the discharge hole 9b hits the many balls 17 and reaches the discharge inner pipe 18a through the gaps between the balls.

Therefore, the volume filled with discharged gas is much reduced compared to conventional ones, and the pressure rises to the specified level in a short time.
After passing through the discharge pipe for one day, it is sent to the refrigeration equipment. The amount of high-pressure gas stored in the window-closing case 2 is also substantially reduced when the compressor is stopped.

Effects of the Invention As described above, the present invention integrates the compression mechanism section and the electric motor section and houses them in a sealed case, and fills the space between the seven compression mechanism sections of the sealed case with a large number of balls. have an effect.

(b) Due to the reduction of the resonant space inside the sealed case, resonance noise is no longer produced, resulting in quieter operation.

(b) When the discharged gas passes between the balls, it repeatedly passes through spaces with a large volume and spaces with a small volume, so the spaces between the balls give multiple muffler effects to the gas flow, reducing the noise of the discharged gas. c) When the compressor starts, the space inside the sealed case is
Since the space is filled with balls and the volume in which gas accumulates in this space is small, the time when the sealed case is filled with high-pressure gas is intense, allowing gas to flow into the refrigeration system quickly and allowing it to rise quickly.

) (c). When the amount of gas accumulated in this space is small and the compressor is stopped, the amount of gas inside the sealed case flowing into the evaporator is small, so the temperature rise in the evaporator due to high temperature gas is alleviated and the efficiency of the refrigeration system is improved. .

(E) Since the oil surface is covered by the balls, even when the compressor is stopped and the oil temperature drops, the refrigerant gas dissolves into the oil, which is a little prone to so-called stagnation. Therefore, there is no need to seal extra gas into the refrigeration system.

In the embodiment, an example is shown in which balls having a specific gravity smaller than that of oil are placed in a rotary type compressor, but the present invention is not limited to this and can also be applied to a reciprocating type or a scroll type. In addition, even if the ball is a steel ball, which has a higher specific gravity than oil, for example, it is possible to obtain the effects described in (a) to (d) above, only by losing the effect (e) described above.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a conventional refrigerant compressor, and FIG. 2 is a sectional view of a main part of a refrigerant compressor showing an embodiment of the present invention. 3...Electric motor part, 3b...Rotor, 4...Compressor machine part, 6...Crankshaft, 13...Oil pump Part, 17...
·ball.

Claims (2)

[Claims] (1) The compression mechanism includes a sealed case that integrally houses a compression mechanism section and an electric motor section, a crankshaft driven by a rotor of the electric motor section, and an oil pump that supplies oil to the crankshaft. A refrigerant compressor in which a large number of balls are filled in a space between the part and the sealed case. (2) The refrigerant compressor according to claim 1, wherein the balls have a specific gravity smaller than the oil stored in the sealed case.