KR950010174B1 - Compressor - Google Patents

Abstract

a suction pipe(21) drawing refrigerant from the exterior of the hermetic compressor; a suction muffler(24) connected to a suction side of a head cover(22) to be communicated with a suction chamber(23); and at least two guide pipes(25,26) introducing refrigerant gas drawn from the suction pipe(21) into the suction muffler(24). The appts. reduces noise resulting from elevated compression ratio according to application of new refrigerant.

Description

Noise reduction device of hermetic compressor

1 is a longitudinal sectional view showing the configuration of a general hermetic compressor.

2 is a cross-sectional view showing the refrigerant gas flow of a typical hermetic compressor.

3a and b show a structure that was considered in completing the present invention,

a is a cross-sectional view,

Figure b is a cross-sectional view taken along the line A-A of Figure 3a.

4 to 8 are enlarged cross-sectional views showing different embodiments of the hermetic compressor noise reduction device according to the present invention.

* Explanation of symbols for main parts of the drawings

20: sealed container 21: suction pipe

22: head cover 23: suction chamber

24: suction muffler 25, 26: suction pipe

25a, 26b: inclined portion 27: noise canceller

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to hermetic compressors, and more particularly to a noise reduction device for hermetic compressors that is suitable for high efficiency and low noise.

In the general hermetic compressor, as shown in FIG. 1, the upper shell 2 is coupled to the upper part of the lower shell 1 to form a hermetically sealed container 3, and an inner middle portion of the hermetically sealed container 3 is provided. The electric mechanism part 5 is provided in the lower part centering on the frame 4 provided, and is provided in the compression mechanism part 6 in the upper part.

The drive mechanism 5 includes a rotor 8 fixed to a crankshaft 7 rotatably supported at an intermediate portion of the frame 4, and a stator 9 supported on the bottom surface of the frame 4. It is.

In addition, the compression mechanism (6) is a cylinder (10) supported on the upper surface of the frame (4), the piston 11 coupled to the upper end of the crankshaft (7) for linear reciprocating motion inside the cylinder (10) )

On the other hand, at the lower end of the crankshaft (7) is a propeller (13) for sucking the refrigeration oil (12) stored in the bottom of the lower shell (1) along the hollow (7a) of the crankshaft (7) Is fixed.

The suction pipe 14 is coupled to one side of the lower shell 1, and the suction valve 15, the valve seat 16, and the discharge valve 17 are disposed at the rear of the cylinder 10. 18) is coupled to be located inside.

In the figure, reference numeral 19 denotes a slider, and 20 denotes a spring.

2 is a functional diagram showing the flow of the refrigerant in the conventional hermetic compressor as described above. The suction mufflers 21 and 22 and the discharge mufflers 23 are provided on both sides of the head cover 18. Are connected to each other, and the discharge muffler 23 has a loop pipe 24 connected thereto.

In such a general hermetic compressor, when power is applied, the rotor 8 and the crankshaft 7 constituting the electric mechanism part 5 rotate, and the scotch yoke mechanism rotates as the crankshaft 7 rotates. By the operating principle of the piston 11 is to perform the operation of inhaling, compressing, and discharging the refrigerant gas while performing a linear reciprocating motion inside the cylinder (10).

That is, the refrigerant gas sucked into the sealed container 3 through the suction pipe 14 fills the inside of the sealed container 3 and is then sucked into the cylinder 10 via the suction mufflers 21 and 22. And compressed by the piston 11 to be discharged through the discharge muffler 23.

At the same time, the refrigerating oil 12 of the lower shell 1 is sucked up through the hollow 7a by the rotation of the crankshaft 7, and is supplied to the compression mechanism 6 from the upper end of the crankshaft 7.

In the conventional hermetic compressor as described above, the head cover 18 is placed on the frame 4 to reduce noise.

However, in the conventional hermetic compressor as described above, the refrigerant gas is sucked after the inside of the hermetic container 3 is filled up, and the length of suction and discharge of the refrigerant gas is long, so that the gas is heated, so that the specific volume of the refrigerant gas is reduced. Since the density is lowered because it increases, there was a very disadvantageous disadvantage in terms of thermal efficiency.

In addition, as the refrigerant is changed from R12 to R134a, the compression ratio is increased to generate a phenomenon in which noise is severely generated.

3 is an enlarged cross-sectional view showing a device considered in the process of completing the present invention, the suction pipe 21 for penetrating the sealed container 20 to guide the refrigerant gas to the inside and the suction side of the head cover 22. The suction muffler 24 installed to communicate with the suction chamber 23 and the suction muffler 24 are connected to the suction pipe 21 in a state where a predetermined interval is maintained and the refrigerant introduced through the suction pipe 21. At least two insertion tubes 25 and 26 for guiding the gas to the suction muffler 24 were constructed.

In this structure, at least two or more insertion pipes 25 and 26 are connected to the suction muffler 24 in a state where the suction pipe 21 and the predetermined distance are maintained, and thus more suction flows through the suction pipe 21. Positive refrigerant gas is directed to the suction muffler 24.

However, even with this structure, satisfactory noise reduction effect could not be obtained.

The present invention has been made to solve the above-mentioned problems, and by connecting at least two or more insertion pipes in a state in which suction pipes and a predetermined interval are maintained in the suction muffler to improve efficiency and reduce noise. It is to provide a noise reduction device for a hermetic compressor.

In order to achieve the object of the present invention as described above, the suction pipe penetrates the sealed container and guides the refrigerant gas to the inside, and the suction muffler is installed to communicate with the suction chamber 23 on the suction side of the head cover, The suction muffler is connected to the suction pipe in a state where a predetermined interval is maintained, and includes at least two or more insertion pipes for guiding the refrigerant gas introduced through the suction pipe to the suction muffler, and the insertion pipes are formed to have a phase difference from each other. There is provided a noise reduction device of a hermetic compressor, which is configured to reduce noise by interference effect and resistance reduction effect.

If the length of the insertion tube is different from each other so as to have a phase difference from each other, the diameters are formed differently.

The insertion pipes each have an inclined portion having the same inclined gradient at the inner end thereof so as to have substantially different lengths.

A noise removing hole is formed on the side wall of the insertion tube to remove noise of a specific band.

In addition, in order to achieve the object of the present invention, the suction pipe penetrates the sealed container to guide the refrigerant gas to the inside, the suction muffler is installed to communicate with the suction chamber on the suction side of the head cover, the suction pipe and the suction pipe at a predetermined interval It is connected to the maintained state is composed of an insertion tube for guiding the refrigerant gas introduced through the suction pipe to the suction muffler, the insertion tube is formed with a length and diameter different from each other, the number of the suction pipe is at least 2 A noise reduction device for a hermetic compressor is provided.

Hereinafter, the noise reduction device of the hermetic compressor according to the present invention will be described according to the embodiment shown in the accompanying drawings.

4 is an enlarged cross-sectional view showing an embodiment of the noise reduction device of the hermetic compressor according to the present invention. The suction pipe 21 penetrates the hermetic container 20 to guide the refrigerant gas therein and the head curve 22. Suction muffler (24) installed to communicate with the suction chamber 23 of the, and the suction muffler (24) is connected to the suction pipe 21 in a state maintained at a constant interval is introduced through the suction pipe (21) At least two insertion tubes 25 and 26 for guiding the refrigerant gas to the suction muffler 24 are formed, and the insertion tubes 25 and 26 are formed to have a phase difference with each other to reduce interference effect and resistance. It is configured to reduce noise by the effect.

In the noise reduction device of the hermetic compressor according to the present invention configured as described above, at least two or more insertion pipes 25 and 26 are connected to the suction muffler 24 in a state where a predetermined interval is maintained. Therefore, a larger amount of refrigerant gas introduced through the suction pipe 21 is guided to the suction muffler 24.

In the embodiment of FIG. 4, since the lengths of the insertion pipes 25 and 26 are different, the phase difference is generated in each of the insertion pipes 25 and 26 to improve the noise reduction effect by the interference effect.

Also, as shown in FIGS. 5A and 5B, since the diameters of the insertion tubes 25 and 26 are different from each other, a phase difference occurs in each of the insertion tubes 25 and 26, thereby reducing noise by the interference effect. To improve.

In the embodiment of FIG. 6, when the inclined portions 25a and 26b having the same gradient are formed at the inner ends of the insertion pipes 25 and 26, respectively, the flow of refrigerant gas is facilitated, thereby reducing the pressure loss. In addition, since the resistance is smaller, the efficiency is improved while the noise is reduced.

In addition, in the embodiment of FIG. 7, the insertion tube 25 (inside the suction muffler 24) is formed with the inclined portions 25a and 26b formed at the inner ends of the insertion tubes 25 and 26, respectively. The noise removing hole 27 is formed on the side wall of the plate 26, and the noise reduction effect can be doubled by removing the noise of the specific band.

In addition, in the embodiment shown in FIG. 8, the number of suction pipes 21 penetrated through the sealed container 20 is at least two in view of the number of the insertion pipes 25 and 26, thereby introducing the refrigerant gas. By increasing the efficiency and noise reduction effect can be further improved.

In addition, in FIG. 8, the lengths and diameters of the insertion pipes 25 and 26 are equally applicable to the embodiments of FIGS. 4 to 7.

Table 1 below shows experimental values comparing the characteristics of the conventional hermetic compressor shown in FIG. 2 and the hermetic compressor noise reduction device according to the present invention shown in FIG.

TABLE 1

According to the above Table 1, the hermetic compressor equipped with the noise reduction device of the present invention has an efficiency of about 14% and a noise reduction of 2.6 dBA and 2 dBA in the X direction compared to the general hermetic compressor shown in FIG. It can be seen that the reduction.

As described above, the noise reduction device of the hermetic compressor according to the present invention is effective even if a new refrigerant such as R143a is applied by connecting at least two or more insertion pipes to the suction muffler while maintaining a suction pipe and a predetermined interval. In addition to improving the noise, the noise is reduced.

Claims (6)

A suction pipe 21 penetrating the sealed container 20 to guide the refrigerant gas therein, a suction muffler 24 installed to communicate with the suction chamber 23 at the suction side of the head cover 22, and the suction At least two or more insertion pipes 25 are installed in the muffler 24 to be connected to the suction pipe 21 while maintaining a predetermined interval to guide the refrigerant gas introduced through the suction pipe 21 to the suction muffler 24. ), The insertion pipe (25) (26) is formed to have a phase difference with each other to reduce the noise by the interference effect and the resistance reduction effect, characterized in that the noise reduction device of the hermetic compressor. The noise reduction device of the hermetic compressor according to claim 1, wherein the insertion pipes (25) are formed in different lengths so as to have a phase difference from each other. The noise reduction device of the hermetic compressor according to claim 1, wherein the insertion pipes (25) are formed with different diameters in order to have a phase difference from each other. 2. The hermetic compressor of claim 1, wherein the insertion pipes (25) and (26) are formed with inclined portions (25a) and (25b) having the same inclined gradient at inner ends thereof, respectively, so as to have substantially different lengths. Noise reduction device. The noise reduction device of the hermetic compressor of claim 4, wherein a noise removing hole (27) is formed on the side wall of the insertion tube (25) to remove noise of a specific band. A suction pipe 21 penetrating the sealed container 20 to guide the refrigerant gas therein, a suction muffler 24 installed to communicate with the suction chamber 23 at the suction side of the head cover 22, and the suction Insertion pipes 25 and 26 are connected to the muffler 24 in a state where the suction pipe 21 is maintained at a predetermined interval to guide the refrigerant gas introduced through the suction pipe 21 to the suction muffler 24. Comprised of, the insertion pipe (25) (26) is formed in a length and diameter different from each other, the noise reduction device of the hermetic compressor, characterized in that the number of the suction pipe (21) is at least two or more.