KR100572879B1 - A multiple hermetic compressor - Google Patents

Abstract

The present invention relates to multiple compressors. The present invention provides a compressor in which a motor unit providing a driving force and a compression mechanism unit driven by the motor unit to compress the working fluid are provided in the sealed container, the motor unit being rotatably installed in the frame 20. Driven by a crank shaft 30 having an eccentric pin 32 to be eccentric at the center of rotation, the frame 20 is provided symmetrically about the center of rotation of the crank shaft 30 and the inside of the working fluid Cylinders 50 and 50 'provided with a compression chamber 51 and a piston 55 for compression, and an eccentric pin 32 of the crankshaft 30 and a ball joint are connected to the cylinders 50 and 50, respectively. ') Connecting rods 60 for respectively transmitting the driving force of the crankshaft 30 to the pistons 55 linearly reciprocating, and balls 62 provided at one end of each of the connecting rods 60. ) Rotatably connects to the eccentric pin 32 of the crankshaft 30 It is configured to include a grain cap 40. According to the present invention as described above there is an advantage that the operation noise of the compressor is reduced, the capacity of the compressor is significantly increased.

Compressor, cylinder, multiple, symmetrical

Description

A multiple hermetic compressor

1 is a cross-sectional view showing the internal configuration of a hermetic compressor according to the prior art.

Figure 2 is a cross-sectional view showing the configuration of a preferred embodiment of a multiple compressor according to the present invention.

Figure 3 is a partial cross-sectional plan view showing a configuration of an embodiment of the present invention.

Figure 4 is a partial cross-sectional view showing the main portion configuration of the crankshaft constituting the embodiment of the present invention.

Figure 5a is a partially cutaway plan view of the connection cap constituting an embodiment of the present invention.

Figure 5b is a partially cutaway side view of the connection cap constituting an embodiment of the present invention.

6 is an operational state diagram showing the operation of the embodiment of the present invention sequentially.

Explanation of symbols on the main parts of the drawings

20: frame 22: boss

23: communication hole 30: crankshaft

32: Eccentric pin 32 ': Stepped portion

33: ball seating groove 35: oil euro

35 ': Oil supply passage 36: Rocker ball

38: Rocker 39: Counterweight

40: connecting cap 41: through hole

41 ': Hanging hole 43: Ball through part

50,50 ': 1st and 2nd cylinder 51: compression chamber

55: piston 60: connecting rod

62: pin connecting ball 64: piston connecting ball

The present invention relates to a compressor, and more particularly, to a multiple compressor provided with a plurality of compression chambers in which the working fluid is compressed.

1 is a cross-sectional view showing the configuration of a hermetic compressor according to the prior art. First, the sealed container 1 is composed of an upper container (1t) and the lower container (1b) to form a sealed space therein. The frame 2 is installed inside the sealed container 1. The stator 3 is fixed to the lower part of the frame 2, and the stator 3 is supported inside the sealed container 1 by a spring 2S. Inside the stator 3 there is a rotor 4 which rotates by electromagnetic interaction with the stator 3. The rotor 4 rotates integrally with the crankshaft 5 penetrating the central portion of the frame 2.

The lower end of the crankshaft 5 is provided with a suction port 5d for pulling up the oil L upward through the inside of the crankshaft. The oil L passing through the suction port 5d is scattered from the eccentric pin 5b formed eccentrically with respect to the center of rotation of the crankshaft 5 along the oil channel 5a. On the opposite side to which the eccentric pin 5b is formed, there is a counterweight 5c which is integrally formed on the crankshaft 5 to hold the center of gravity by the eccentric pin 5b.

One end of the connecting rod 8 is connected to the eccentric pin 5b of the crankshaft 5. The other end of the connecting rod 8 is connected to the piston 7 to convert the rotational movement of the crankshaft 5 into a linear reciprocating motion of the piston 7. The piston 7 compresses the working fluid while linearly moving in the compression chamber 6 'of the cylinder 6 provided in the frame 2.

The valve assembly 9 and the head cover 10 are assembled at the tip of the compression chamber 6 'of the cylinder 6. The suction muffler 11 is assembled to the head cover 10 to reduce the noise of the working fluid to the compression chamber to supply. The working fluid is supplied to the suction muffler 11 through a suction pipe 12 installed through the sealed container 1. Reference numeral 13 denotes a discharge pipe that supplies the working fluid compressed and discharged in the compression chamber 6 'to the outside of the compressor.

However, the hermetic compressor according to the related art as described above has the following problems.

That is, in the conventional compressor, the cylinder 6 is formed on one side of the frame 2 in which the crankshaft 5 is rotatably installed, and the compression provided in the cylinder 6 by the rotation of the crankshaft 5. In the seal 6 ', the piston 7 is linearly reciprocated while compressing the working fluid.

However, since the cylinder 6 provided with the compression chamber 6 'is formed to be biased to one side from the center of the frame 2, especially when the piston 7 performs the compression stroke, While the force acts only in one direction with respect to the torque fluctuation of the motor portion, vibration occurs in the frame 2. Noise is generated by the vibration, and the parts provided in the frame 2 are damaged while contacting the inner wall of the sealed container 1, and the mechanism part such as the crankshaft 5 by the vibration of the frame 2 is damaged. There is also a problem that wear and sliding loss of the sliding portion caused by vibration.

In addition, in the prior art, there is only one compression chamber 6 ', which causes a relatively small capacity to compress the working fluid. In order to solve this problem, the inner diameter of the compression chamber 6 'must be increased or the amount of eccentricity of the eccentric pin 5b of the crankshaft 5 must be increased. However, such a design change causes a problem that the size of other components constituting the compressor must be large.

Accordingly, an object of the present invention is to solve the conventional problems as described above, and to eliminate the imbalance generated in the mechanism part during the operation of the compressor.

It is another object of the present invention to provide a compressor having a relatively high compression capacity while having the same conditions.

Another object of the present invention is to relatively simplify the configuration for power transmission to a plurality of compression provided.

According to a feature of the present invention for achieving the above object, the present invention provides a compressor provided with a motor unit for providing a driving force and a compressor mechanism for driving the motor fluid to compress the working fluid. A crank shaft rotatably mounted to the frame and driven by the motor unit and having an eccentric pin eccentrically at the center of rotation, is provided symmetrically about the center of rotation of the crank shaft in the frame and has a working fluid therein. A connecting rod configured to respectively provide a compression chamber and a piston for compression, an eccentric pin and a ball joint of the crankshaft, and a piston for linearly reciprocating the inside of the cylinder to transfer driving force of the crankshaft, respectively; The ball provided at one end of the connecting rod is rotatably connected to the eccentric pin of the crankshaft. Is configured to include a connection cap, the outer surface of the eccentric pin of the crankshaft is formed with a ball seating groove for seating a portion of the ball of each connecting rod, the connection cap in the position corresponding to the ball seating groove A ball through portion is formed to prevent the ball from being detachably seated in the ball seating groove.

delete

The ball through portion is formed in a width larger than the outer side of the connection cap, the outer width is formed smaller than the diameter of the ball.

An oil supply passage is formed through the eccentric pin of the crankshaft so that oil sucked through the crankshaft is scattered to the upper portion of the eccentric pin. The oil supply passage communicates with the oil passage and supplies oil to the ball seating groove. .

Stepped portion is formed is formed around the top edge of the eccentric pin is seated, the locker hole penetrates the outer surface of the stepped portion for the fixing of the connection cap is further provided.

According to another feature of the invention, the present invention is a compressor provided with a motor unit for providing a driving force and a compressor mechanism for driving the motor fluid to compress the working fluid is provided inside the hermetically sealed container, rotatably installed on the frame A crankshaft driven by the motor unit and having an eccentric pin eccentrically at a rotational center, and at least two at a predetermined angular interval with respect to the rotational center of the crankshaft in the frame and having a compression for compressing a working fluid therein; A connecting rod which is respectively provided with a cylinder each provided with a seal and a piston, an eccentric pin of the crankshaft, a piston and a ball joint, and a driving rod of the crankshaft to the piston reciprocating linearly inside the cylinder, respectively; Rotatably connecting a ball provided at one end of the crankshaft to an eccentric pin It is configured to include a cap cap, the outer surface of the eccentric pin of the crankshaft ball seating grooves are formed at a predetermined angle intervals are seated a portion of the ball of each connecting rod, the connection cap corresponding to the ball seating groove A ball through portion is formed in the ball seating groove rotatably seated in the ball seating groove.

delete

An oil flow path for penetrating the eccentric pin of the crankshaft to diffuse the oil sucked through the crankshaft to the upper portion of the eccentric pin is formed, and an oil supply flow passage communicating with the oil flow path to supply oil to the ball seating grooves, respectively. It is formed penetrating laterally.

A relatively small stepped portion surrounding the top edge of the eccentric pin is formed so that the upper portion of the connection cap is seated, and the stepped portion protrudes to the center upper portion of the connection cap, and the eccentric pin protrudes to the upper portion of the connection cap. The rocker hole penetrates the upper end of the locker for fixing the connection cap is further provided.

The connecting cap penetrates up and down the inside thereof so that a through hole having a relatively smaller inner diameter than that of an upper portion is formed to be inserted from the upper portion of the eccentric pin to the lower portion, and the stepped portion is seated on the upper portion of the through hole. Hook holes are formed to correspond to the outer diameter of the stepped portion.

According to the multiple compressor according to the present invention having such a configuration, the imbalance of the force generated in the frame during the operation of the compressor is eliminated, thereby minimizing the generation of vibration and noise, and the capacity of the compressor is relatively increased.

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

2 is a sectional view showing the main part of a preferred embodiment of the multiple compressor according to the present invention, FIG. 3 is a partial sectional view showing the main part of the embodiment of the present invention, and FIG. The configuration of the crankshaft is shown in a partial cross-sectional view, and in Fig. 5, the configuration of the connection cap constituting the embodiment of the present invention is shown in a partially cutaway plan view and a partially cutaway side view.

As shown in these figures, the frame 20 is installed inside the hermetically sealed container and is a part where various components constituting the compressor are installed. The frame 20 is generally supported by a spring inside the hermetic container. A boss 22 is formed to extend below the center of the frame 20, and a communication hole 23 is formed by penetrating the frame 20 up and down to the center of the boss 22.

The crankshaft 30 is installed through the communication hole 23. The crankshaft 30 is connected to the rotor of the motor unit provided in the lower portion of the frame 20 is rotated integrally with the rotor.

An eccentric pin 32 is provided at the upper end of the crankshaft 30. The eccentric pin 32 is formed at an eccentric position at the center of rotation of the crankshaft 30, and is connected to the connecting rod 60 to be described below to serve to transfer the driving force of the crankshaft 30. . A stepped portion 32 ′ is formed at an upper end of the eccentric pin 32. The step portion 32 ′ is formed around the upper edge of the eccentric pin 32 and has a smaller diameter than other portions of the eccentric pin 32.

The ball seating groove 33 is symmetrically formed around the outer circumferential surface of the eccentric pin 32. The ball seating groove 33 is a portion in which a part of the pin connecting ball 62 of the connecting rod 60 to be described below is seated. For reference, the ball seating groove 33 is preferably formed in a depth smaller than the radius of the pin connecting ball 62.

An oil passage 35 is formed by penetrating the inside of the eccentric pin 32 vertically. The oil passage 35 extends from the bottom of the crankshaft 30, and sucks oil in the bottom of the sealed container by the rotation of the crankshaft 30, and between the crankshaft 30 and the boss 22. It is delivered to the sliding portion to lubricate, and to diffuse the oil to the top of the eccentric pin (32). In addition, an oil supply passage 35 ′ is formed in the eccentric pin 32 to communicate the oil passage 35 and each ball seating groove 33. The oil supply passage 35 ′ is formed to penetrate the eccentric pin 32 laterally.

The locker hole 36 is formed by penetrating the stepped portion 32 'of the eccentric pin 32 laterally. The locker hole 36 is a portion into which the locker 38 for fixing the connection cap 40 to be described below is inserted. The rocker 38 is formed so that both ends thereof may protrude to the outside of the locker hole 36.

At the upper end of the crank shaft 30 in which the eccentric pin 32 is formed, a counterweight 39 is provided to solve the rotational imbalance caused by the eccentric pin 32 being eccentric at the center of rotation of the crank shaft 30. . The counterweight 39 is formed on the opposite side of the eccentric pin 32 about the center of rotation of the crankshaft 30.

The connection cap 40 is formed to be coupled to the eccentric pin 32 at the top of the eccentric pin 32, the pin connecting ball 62 of the connecting rod 60 to be described below to the eccentric pin 32 It plays a role. As shown in FIG. 5, the connection cap 40 penetrates through the center thereof to form a through hole 41. The through hole 41 has an inner diameter corresponding to an outer diameter of the eccentric pin 32. A hook hole 41 'having an inner diameter corresponding to an outer diameter of the step portion 32' is formed at an upper end of the through hole 41.

Here, the hook through hole 41 ′ is formed to have a smaller diameter than the through hole 41. Therefore, the connection cap 40 is fixed to the eccentric pin 32 without descending by penetrating through the hook hole 41 'and the stepped portion 32' of the eccentric pin 32 is seated. Will be.

On the outer circumferential surface of the connection cap 40, a ball through portion 43 is formed to correspond to the ball seating groove 33 of the eccentric pin 32. Therefore, the ball through portion 43 is formed symmetrically to each other in the connection cap 40. The ball through portion 43 is a portion through which the connecting rod 60 to be described below, the pin connecting ball 62 of the connecting rod 60 is hooked.

The ball through portion 43 is preferably formed with a width (W) relatively larger on the inner side than the width (w) on the outside of the connection cap (40). However, depending on the diameter of the pin connecting ball 62 is not necessarily so, at least the width (w) at the outside should be formed smaller than the diameter of the pin connecting ball 62. This is to prevent the pin connecting ball 62 from exiting the connection cap 40 through the ball through portion 43.

The ball through portion 43 is formed to extend to the lower portion of the connecting cap 40. By doing so, the connecting cap 40 can be assembled from the upper portion of the eccentric pin 32 in a state where the pin connecting ball 62 is seated in the ball seating groove 33.

Meanwhile, first and second cylinders 50 and 50 'are symmetrically provided at both ends of the upper surface of the frame 20, respectively. Compression chambers 51 are formed in the cylinders 50 and 50 ', respectively, and pistons 55 are provided in the compression chambers 51 so as to be capable of linear reciprocating movement. Of course, a valve assembly and a head cover (not shown) and the like are provided at the front end of the compression chamber 51 of the cylinders 50 and 50 ', respectively, to control the flow of the working fluid into and out of the compression chamber 51.

The piston 55 and the crankshaft 30 are connected by a connecting rod 60. That is, the rotational motion of the crankshaft 30 is converted into a linear reciprocating motion of the piston 55 by the connecting rod 60. The connecting rod 60 is connected to the crankshaft 30 and the piston 55 by a ball joint. That is, pin connecting balls 62 and piston connecting balls 64 are respectively provided at both ends of the connecting rod 60.

The pin connecting ball 62 is seated in the ball seating groove 33 of the eccentric pin 32 by the connecting cap 40, the piston connecting ball 64 is caulking at the rear end of the piston (55). Is connected.

On the other hand, although not shown in the drawings, as another embodiment of the present invention, the cylinder 50 having the compression chamber 51 is located on a circular trajectory at a constant distance from the center of rotation of the crankshaft 30 Dogs may be provided at regular angular intervals.

For example, three cylinders 50 may be provided at 120 ° intervals, or four may be provided at 90 ° intervals. Then, the pistons 55 respectively provided in the compression chambers 51 of the cylinders 50 are connected to the eccentric pins 32 of the crankshaft 30 by connecting rods 60, respectively, so that power can be transmitted. . To this end, the ball seating grooves 33 should be formed in the eccentric pin 32 to correspond to the number of the cylinders 50, and the connection cap 40 should be formed in the corresponding number of ball through portions 43. do.

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

First, in the present invention, it will be described to connect the pin connecting ball 62 of the connecting rod 60 to the eccentric pin 32 of the crank shaft 30 by the connecting cap 40. First, the piston connecting ball 64 of the connecting rod 60 is coupled to the piston (55) by coupling. Then, each of the pistons 55 to which the connecting rods 60 are connected is inserted into the corresponding compression chamber 51.

The ball seating groove 33 of the eccentric pin 32 connects the pin connecting ball 62 of the connecting rod 60 to which the piston connecting ball 64 is cocked to the piston 55 inserted into the compression chamber 51. To each.

In this state, the connection cap 40 is inserted into the eccentric pin 32 at the top of the eccentric pin 32. At this time, the ball seating groove 33 and the ball through portion 43 is positioned so that the connection cap 40 on the eccentric pin (32).

When the connecting cap 40 is inserted into the eccentric pin 32, the step portion 32 'is seated in the hook hole 41', and the step of the eccentric pin 32 is inserted into the through hole 41. The lower portion 32 'is located. In addition, the pin connecting ball 62 is seated on the ball through portion 43 is not separated from the ball through portion 43.

After the connection cap 40 is inserted into the eccentric pin 32 as described above, the locker 38 is inserted into the locker hole 36 so that the connection cap 40 is not separated from the eccentric pin 320. Therefore, the connecting cap 40 is not detached from the eccentric pin 32 arbitrarily due to both ends of the locker 38 protruding to the outside of the locker hole 36. In this case, the connecting rod 60 ) And the crankshaft 30 is completed.

Next, the operation of the multiple compressor of the present invention with reference to FIG. First, FIG. 6A shows a state where the piston 55 of the first cylinder 50 is located at the top dead center, and the piston 55 of the second cylinder 50 'is at the bottom dead center. Accordingly, the compressed working fluid is discharged in the first cylinder 50, and the working fluid to be compressed is sucked in the second cylinder 50 '.

In this state, when the crankshaft 30 rotates clockwise based on the drawing, the state of FIG. 6B is obtained. That is, suction of the working fluid to be compressed is performed in the first cylinder 50, and compression of the working fluid is performed in the second cylinder 50 ′.

Subsequently, when the crankshaft 30 is rotated, as shown in FIG. 6C, in the first cylinder 50, the piston 55 is positioned at the bottom dead center, and the suction of the working fluid to be compressed is completed. In the second cylinder 50 ', the piston 55 is located at the top dead center, and the compressed working fluid is discharged.

Meanwhile, in FIG. 6D, as the crank shaft 30 is continuously rotated, compression of the working fluid in the compression chamber 51 is performed in the first cylinder 50, and compression is performed in the second cylinder 50 ′. The process of inhaling the working fluid is carried out. This process of FIG. 6 is repeatedly performed.

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 multiple compressor according to the present invention as described in detail above, the parts for compressing the working fluid are arranged in the frame symmetrically or at regular angular intervals. Therefore, various forces generated during the operation of the compression mechanism for the compression of the working fluid cancel each other to solve the unbalance of the frame, thereby minimizing the vibration of the frame.

As the vibration of the frame is minimized during the operation of the compressor, the operation noise is reduced, the parts installed in the frame are prevented from colliding with the sealed container and damaged, and the wear of the sliding parts due to the vibration is minimized. It is easy to design and can expect the effect of improving durability.

In addition, since the compression of the working fluid proceeds sequentially in a plurality of cylinders, it is also possible to expect the effect that the capacity of the compressor is significantly increased without increasing the overall size of the compressor.

In addition, since the working fluid may be sequentially compressed and discharged from a plurality of cylinders, the effect that the pulsation of the compressed working fluid is relatively reduced may be expected.

Claims (10)

In the compressor provided with a motor unit for providing a driving force and a compression mechanism is driven in the motor unit to compress the working fluid in the sealed container, A crank shaft rotatably mounted to the frame and driven by the motor unit and having an eccentric pin to be eccentrically at the center of rotation; A cylinder provided symmetrically about the center of rotation of the crankshaft in the frame and having a compression chamber and a piston for compressing a working fluid therein, respectively; A connecting rod connected to the eccentric pin of the crankshaft and a ball joint to transfer the driving force of the crankshaft to the piston reciprocating linearly inside the cylinder, respectively; And a connection cap for rotatably connecting a ball provided at one end of each connecting rod to an eccentric pin of the crankshaft. The outer surface of the eccentric pin of the crankshaft is formed with a ball seating groove for seating a portion of the ball of each connecting rod, the connection cap is rotatable to the ball seating groove in the position corresponding to the ball seating groove Multiple compressor, characterized in that formed through the ball penetrating portion is prevented from being separated. delete The multiple compressor according to claim 1, wherein the ball through portion is formed to have a larger width at an inner side than an outer side of the connection cap, and an outer width is smaller than a diameter of the ball. The oil flow path of claim 1, wherein an oil flow path through which the oil sucked through the crankshaft flows to the upper portion of the eccentric pin is formed through the eccentric pin of the crankshaft, and is in communication with the oil flow path to supply oil to the ball seating groove. Multiple compressor characterized in that the supply passage is further provided. According to any one of claims 1 to 4, wherein the stepped portion is formed in which the connection cap surrounding the top edge of the eccentric pin is formed, the locker for fixing the connection cap penetrates through the outer surface of the stepped portion Multiple compressor characterized in that the locker ball is further provided. In the compressor provided with a motor unit for providing a driving force and a compressor mechanism for driving the motor fluid to compress the working fluid in the sealed container, A crank shaft rotatably mounted to the frame and driven by the motor unit and having an eccentric pin to be eccentrically at the center of rotation; At least two cylinders are provided in the frame at predetermined angular intervals around the center of rotation of the crankshaft and are provided with a compression chamber and a piston for compressing the working fluid therein; A connecting rod connected to the eccentric pin and the piston of the crankshaft and a ball joint to transfer the driving force of the crankshaft to the piston reciprocating linearly inside the cylinder, respectively; And a connection cap for rotatably connecting a ball provided at one end of each connecting rod to an eccentric pin of the crankshaft. On the outer surface of the eccentric pin of the crankshaft, ball seating grooves in which a part of the balls of the respective connecting rods are seated are formed at regular angle intervals, and the connection caps have the ball seating grooves at positions corresponding to the ball seating grooves. Multiple compressor, characterized in that the ball through which is formed so as not to be detached seated rotatably. delete The oil flow path of claim 6, wherein an oil flow path through which the oil sucked through the crankshaft is scattered to the upper portion of the eccentric pin is formed through the eccentric pin of the crankshaft, and is in communication with the oil flowpath to supply oil to the ball seating grooves, respectively. Multiple compressor characterized in that the oil supply passage is formed through the eccentric pin transversely. The method of claim 6 or claim 8, wherein a relatively small stepped portion surrounding the upper edge of the eccentric pin is formed to seat the upper portion of the connection cap, the stepped portion protrudes to the center upper portion of the connection cap, And a locker hole through which the locker for fixing the connection cap penetrates through the top of the eccentric pin protruding to the upper portion of the connection cap. 10. The method of claim 9, wherein the connecting cap penetrates up and down the inside of the through-hole is formed so that the inner diameter of the lower than the inner diameter of the upper portion is formed to be inserted from the top of the eccentric pin to the bottom, the upper portion of the through hole There is a multi-compressor, characterized in that the hook hole for mounting the stepped portion corresponding to the outer diameter of the stepped portion.

Images