KR101078468B1 - A suction muffler for hermatic compressor - Google Patents

Abstract

The present invention relates to a suction silencer of a hermetic compressor. The present invention has a body (30, 40) having a connection portion 31 in communication with the compression chamber side on one side and a suction portion 43 which is a passage through which the working fluid is transmitted from the outside to the inside, and the body (30) Is installed in the space formed inside the 40, the connecting portion 31 and the pumping outlet 51 is in communication with the internal space 41 and the pumping inlet portion 55 of the body (30, 40) is in communication It comprises a pumping port 50 for pumping and delivering the working fluid to the compression chamber. The body is composed of the upper body 30 is provided with the connecting portion 31 and the lower body 40 having the suction portion 43, the upper body 30 and the lower body 40 is coupled to The pumping port 50 is provided in a space formed therein. The pumping port 50 is configured to be unfolded and compressed in a bellows type, when the unfolded internal volume is formed equal to or larger than the volume of the working fluid required for at least one compression stroke. According to the present invention, it is possible to quickly transfer more working fluid into the compression chamber in the suction stroke, thereby increasing the efficiency of the compressor.

Hermetic compressor, suction silencer, pumping port

Description

A suction muffler for hermatic compressor

1 is a perspective view showing a main configuration of a hermetic compressor according to the prior art.

Figure 2 is an exploded front view showing the configuration of a suction silencer according to the prior art.

Figure 3 is a partial cross-sectional exploded perspective view showing the configuration of a preferred embodiment of the suction silencer of the hermetic compressor according to the present invention.

4 is a front view showing the configuration of an embodiment of the present invention.

5 is an operational state diagram showing that the embodiment of the present invention is operated.

Explanation of symbols on the main parts of the drawings

30: upper body 31: connecting portion

33: exit duct 35: hanger groove

40: lower body 41: internal space

43: suction part 45: suction hole

47: oil discharge hole 50: pumping hole

51: pumping outlet 52: outlet flow path

53: hanger flange 55: pumping inlet

The present invention relates to a hermetic compressor, and more particularly to a suction silencer for removing the noise of the working fluid delivered to the compression chamber in the hermetic compressor.

1 shows an internal configuration of a hermetic compressor according to the prior art. According to this, the exterior of the compressor is formed into a sealed container configured by separating the lower container 1 and the upper container (not shown). Inside the sealed container, various components constituting the compressor are installed. A mounting plate 3 is provided below the lower container 1. The mounting plate 3 is for fixing at the position where the compressor is installed.

The frame 5 is installed inside the lower container 1. The frame 5 is provided with various components constituting the compressor. The motor unit 7 is provided below the frame 5. That is, the stator 8 is fixed to the frame 5 and the rotor 9 is installed through the inside of the stator 8 up and down. The rotor 9 is rotated by electromagnetic interaction with the stator 8.

The upper portion of the frame 5 is provided with a configuration for compressing the working fluid by the driving force of the motor unit (7). The crankshaft 10 is installed through the frame 5 so that the rotor 9 and the center of rotation coincide with each other. The portion of the crankshaft 10 extending downward of the frame 5 is pressed into the center of the rotor 9 so that the crankshaft 10 and the rotor 9 are integrally rotated.

An eccentric pin 11 is provided at the top of the crankshaft 10 so as to be eccentrically provided at the center of rotation of the crankshaft 10. The eccentric pin 11 is connected to one end of the connecting rod 13. The other end of the connecting rod 13 is connected to the piston 15 to convert the rotational force of the crankshaft 10 into a linear reciprocating motion of the piston 15.

The piston 15 is provided in the compression chamber formed through the cylinder 17 provided on the frame 5. The piston 15 compresses the working fluid while linearly reciprocating in the compression chamber.

The valve assembly 18 is installed at the front end of the cylinder 17. The valve assembly 18 serves to control the flow of the working fluid into and out of the compression chamber. A head cover assembly 19 is provided together with the valve assembly 18, and a structure in which a working fluid passing through the valve assembly 18 flows inside the head cover assembly 19.

Meanwhile, a suction silencer 20 is provided to remove noise of the working fluid in which the cylinder 17 flows into the compression chamber via the valve assembly 18. The configuration of the suction silencer 20 will be described with reference to FIG. 2.

The suction silencer 20 is largely composed of an upper body 21 and a lower body 22. The upper body 21 and the lower body 22 has a predetermined space therein, the flow path is formed in the space to guide the flow of the working fluid. The upper body 21 and the lower body 22 is coupled by ultrasonic fusion.

The upper body 21 is formed by protruding the connecting portion 23. The connecting portion 23 is located between the head cover assembly 19 and the valve assembly 18 and selectively communicates with the compression chamber. A passage is formed through the connection portion 23 to communicate the interior of the suction silencer 20 with the compression chamber. The passage is formed in the outlet duct 24 in the upper body 21.

The suction part 25 is formed at one side of the lower body 22. A suction hole 26 is formed in the suction part 25, and the suction hole 26 communicates the outside of the suction silencer 20 with the inside of the lower body 22. The working fluid is transferred into the suction silencer 20 through the suction hole 26.

In the figure, reference numeral 20 'is a discharge silencer, and 27 is an oil discharge hole for discharging oil transferred to the suction silencer 20 to the outside.

However, the suction silencer according to the related art as described above has the following problems.

In the conventional suction silencer 20, the working fluid flows inside while being guided by the structures formed therein. That is, the working fluid flows through the suction silencer 20 through a predetermined path at the time of manufacture, and the driving force for the flow is only a force to suck the working fluid in the compression chamber. Therefore, there is a problem that the efficiency of the compressor is relatively low because the amount of the working fluid enters into the compression chamber is relatively small.

Accordingly, the present invention is to solve the problems of the prior art as described above, to maximize the amount of working fluid sucked into the compression chamber in the suction silencer.

According to a feature of the present invention for achieving the above object, the present invention has a body having a connection portion communicating with the compression chamber side on one side and a suction portion that is a passage through which the working fluid is transferred from the outside to the inside, It is installed in the space formed inside of the body and the connecting portion and the pumping outlet is in communication with the internal space and the pumping inlet portion of the body is configured to include a pumping port for pumping and delivering the working fluid to the compression chamber.

The body is composed of an upper body provided with the connecting portion and a lower body provided with the suction portion, the pumping port is provided in a space formed by coupling the upper body and the lower body.

The pumping port is configured to be unfolded and compressed in a bellows type, when the unfolded internal volume is formed equal to or larger than the volume of the working fluid required for at least one compression stroke.

Either side of the pumping inlet or the suction part of the pumping port is provided with a configuration for preventing the back flow of the working fluid.

The suction silencer of the hermetic compressor according to the present invention having the configuration as described above can quickly transfer more working fluid into the compression chamber in the suction stroke by means of a bellows type pumping port provided therein, thereby improving the efficiency of the compressor. There is an advantage to that.

Hereinafter, a preferred embodiment of a suction silencer of a hermetic compressor according to the present invention will be described in detail with reference to the accompanying drawings.                     

Figure 3 shows a schematic partial cross-sectional exploded perspective view of a preferred embodiment of the suction silencer of the hermetic compressor according to the invention, Figure 4 shows a configuration of the embodiment of the present invention in a front view.

As shown in these figures, the suction silencer of the embodiment of the present invention has an upper body 30. The upper body 30 forms an upper portion of the suction silencer, and a predetermined space is formed therein. The upper body 30 has a connection portion 31 is formed to protrude. The connection part 31 is installed in communication with the inlet of the valve assembly when the head cover assembly is coupled with the valve assembly. The connection part 31 is provided with a flow passage communicating with the inside of the suction silencer.

An outlet duct 33 is provided inside the upper body 30 so as to communicate with a flow path of the connection part. The outlet duct 33 is preferably connected in a straight line with the connecting portion. A hook groove 35 is formed inside the inlet of the outlet duct 33.

The lower body 40 is combined with the upper body 30 to form a suction silencer. An inner space 41 is formed inside the lower body 40. The internal space 41 may be provided with a structure for forming a flow path of the working fluid. Noise of the working fluid is also eliminated by the structure forming the flow path in the interior space 41. The structure forming the flow path may be a partition wall that partitions the internal space 41.

The suction part 43 is provided at one lower end side of the lower body 40. The suction part 43 is configured in a shape extending toward the front. The suction part 43 is provided with a suction hole 43 penetrating the inside thereof and communicating with the internal space 41 of the lower body 40. Through the suction hole 43, the working fluid introduced into the sealed container is transferred into the suction silencer. Reference numeral 47 denotes an oil discharge hole for discharging oil sucked together with the working fluid into the suction silencer.

A pumping port 50 is installed in the space formed by the upper body 30 and the lower body 40. The pumping port 50 is connected to the upper body 30, most of which is located in the inner space (41). The pumping port 50 is configured in a bellows shape, it is capable of pumping the working fluid while being compressed and expanded. The material for forming the pumping port 50 is preferably flexible and elastic such as rubber or synthetic resin.

The pumping port 50 is provided with a pumping outlet part 51. The pumping outlet part 51 communicates with the outlet duct 33. The pumping outlet part 51 is provided with an outlet passage 52 for communicating the inside of the pumping port 50 and the inside of the outlet duct 33. A hanger flange 53 is provided around the outside of the tip of the pumping outlet part 51. The hook flange 53 is seated in the hook groove 35 of the outlet duct 33 serves to couple the pumping port 50 to the outlet duct 33.

The pumping inlet 50 is formed with a pumping inlet 55 on one side of the lower end thereof. The pumping inlet 55 is a passage through which the working fluid in the internal space 41 flows into the pumping port 50. The pumping inlet 55 is preferably formed at a position adjacent to each other and the suction hole 45 of the lower body 40. Of course, when there is a structure for guiding the flow of the working fluid in the internal space 41, the pumping inlet 55 and the suction hole 45 can not directly adjoin, the structure for guiding the flow of the working fluid The end of the flow path formed by the pump and the inlet portion 55 should be designed adjacent to each other.

The pumping port 50 is preferably formed such that the volume thereof is equal to or greater than the amount of working fluid compressible at a time in the compression chamber. That is, when the piston is at the bottom dead center, the volume of the compression chamber and the volume inside the pumping port 50 should be equal to or larger than the volume inside the pumping port 50.

For reference, the pumping inlet 55 is preferably provided with a structure for preventing the back flow of the working fluid. That is, the working fluid sucked into the pumping hole 50 through the pumping inlet 55 is not discharged back into the inner space 41. Such a configuration may be provided in the suction hole 45 of the suction part 43. The detailed configuration for preventing the back flow of the working fluid is already known, so the detailed description is omitted.

Hereinafter, the operation of the suction silencer of the hermetic compressor according to the present invention having the configuration as described above will be described in detail.

Compressors are generally used in heat exchange cycles in which the working fluid delivered from other components of the heat exchange cycle is compressed and transferred to another component of the heat exchange cycle. The working fluid delivered to the inside of the compressor is first sucked into the suction silencer.

That is, the working fluid is sucked into the inner space 41 through the suction hole 45 of the suction part 43, and the sucked working fluid is inside the pumping hole 50 through the pumping inlet part 55. Enter

On the other hand, the working fluid is transmitted to the inside of the compression chamber in the suction silencer by the suction stroke in which the piston moves to the bottom dead center. That is, as the piston moves from the inside of the compression chamber to the bottom dead center, the pressure in the compression chamber is lowered, and suction force is generated to suck the working fluid inside the suction silencer into the compression chamber.

At this time, by the suction force generated in the compression chamber, as shown in Figure 5, the pumping port 50 is pressed, the working fluid inside the pumping port 50 through the outlet passage 52 through the outlet duct (33) ) Is transmitted to the compression chamber through the flow path inside the connection portion 31. For reference, as the pumping port 50 is compressed, the backflow of the working fluid through the pumping inlet part 55 is blocked through the backflow preventing structure.

On the other hand, as in the present invention, when the pumping port 50 is pressed while the operation to send the working fluid therein to the compression chamber, it is possible to be delivered to the compression chamber more quickly and a sufficient amount of the working fluid .

Once the compression stroke is completed, the working fluid delivered to the inner space 41 through the suction part 43 again flows into the pumping port 50. That is, as the working fluid is transferred to the inside of the pumping port 50 through the pumping inlet part 55, the pumping port 50 is expanded again and waits for the next compression stroke.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

In the suction silencer of the hermetic compressor according to the present invention as described in detail above, the following effects can be expected.                     

In the present invention, since the pumping port is used to transfer the working fluid from the suction silencer to the inside of the compression chamber, a faster and larger amount of the working fluid is delivered to the compression chamber and compressed, so that the overall compression efficiency of the compressor is increased. Can be.

Claims (4)

A body having a connection part connected to the compression chamber side at one side and a suction part being a passage through which the working fluid is transferred from the outside to the other side; It is installed in the space formed in the body and the connecting portion and the pumping outlet portion is in communication with the internal space and the pumping inlet portion of the body is characterized in that it comprises a pumping port for pumping and delivering the working fluid to the compression chamber Silencer of the compressor. According to claim 1, wherein the body is composed of the upper body and the lower body having the suction portion provided with the connecting portion, characterized in that the pumping port is provided in the space formed therein is coupled to the upper body and the lower body. Silencer of hermetic compressor. According to claim 1 or 2, wherein the pumping port is configured to be expanded and compressed in a bellows type, the inner volume of the unfolded is characterized in that formed at least equal to or larger than the volume of the working fluid required for at least one compression stroke. Silencer of hermetic compressor. 4. The silencer of claim 3, wherein either one of the pumping inlet portion and the suction portion of the pumping port is configured to prevent backflow of the working fluid.

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