KR100559082B1 - compressor - Google Patents

Abstract

The present invention relates to a compressor, an object of the present invention is to provide a compressor that is provided to reduce the driving noise while reducing the driving noise by employing a low-speed motor.

To this end, the compressor according to the present invention comprises a sealed container, a compression mechanism including a compression chamber to perform compression of a refrigerant, a drive unit provided with a low-speed motor of four poles or more to provide compression power according to the compression of the refrigerant, and the compression. It is configured to include a charging device provided to increase the flow rate of the refrigerant flowing into the chamber.

Description

Compressor {A compressor}

1 is a cross-sectional view showing the overall structure of a compressor according to the present invention.

2 is a plan sectional view of a compressor according to the present invention.

Figure 3 is a cross-sectional view showing the structure of the charging device according to the present invention, showing a state in which the refrigerant inside the sealed container flows into the charging chamber.

4 is a cross-sectional view showing the structure of the charging device according to the present invention, showing a state in which the refrigerant in the charging chamber is supplied to the compression chamber.

5 is a perspective view of a vane according to the present invention.

6 is a plan cross-sectional view of the vane according to the present invention.

Explanation of symbols on the main parts of the drawings

1: airtight container 2: suction line

3: discharge tube 10: compression mechanism

11a: compression chamber 20: drive unit

30: cylinder block 50: supercharger

51: auxiliary cylinder 51a: supercharge room

52: Auxiliary piston 53: Auxiliary connecting rod

54: suction passage 54a: auxiliary suction valve

55: discharge valve 55a: auxiliary discharge valve

60: oil pick-up member 70: vane

72, 73: lower bending portion 74, 75: upper bending portion

The present invention relates to a compressor, and more particularly, to a compressor provided by using a low-speed motor to reduce the driving noise while preventing a decrease in compression capacity.

Generally, a refrigerating cycle employed in a refrigerator or an air conditioner includes a compressor for sucking and compressing a low pressure refrigerant and discharging the refrigerant at a high pressure, a condenser for condensing the refrigerant discharged from the compressor, and an expansion device for expanding the refrigerant condensed from the condenser. The evaporator, which exchanges heat with surrounding air while the refrigerant expanded in the expansion device is evaporated, is provided to form a closed circuit through the refrigerant pipe.

Therefore, the refrigerant circulating in the refrigeration cycle condenses in the condenser releases heat to the surroundings, evaporates in the evaporator and absorbs the surrounding heat, and the cooling action is performed by such an evaporator.

The dual compressor has a compression mechanism for compressing the refrigerant in the hermetic container, and a motor providing compression power according to the compression of the refrigerant. The hermetic container has a suction pipe and a compression mechanism for delivering the evaporator-side refrigerant into the hermetic container. Is provided with a discharge pipe for transferring the refrigerant compressed by the condenser side.

Through such a configuration, the refrigerant introduced into the sealed container of the compressor from the evaporator through the suction pipe is compressed and compressed into the compression mechanism by driving the motor, and the refrigerant compressed through the compression mechanism is discharged to the condenser through the discharge pipe.

On the other hand, as a compressor motor of such a refrigeration cycle, in consideration of the capacity of the refrigeration cycle, a two-pole motor having a commercial rotational speed of approximately 3000rpm to 3600rpm is mainly employed.

However, since the compressor of the conventional refrigeration cycle employs a high-speed two-pole motor, there is a problem in that the driving noise is greatly increased by vibration caused by the high speed rotation of the motor.

In addition, in order to reduce the driving noise of such a compressor, a case in which a low speed motor of two poles or more, such as a four pole motor provided at a commercial speed of 1500 rpm to 1800 rpm may be employed, may be considered. Due to the reduction in the compression capacity of the compressor, there is a problem that can not perform a smooth compression of the refrigerant.

The present invention is to solve such a problem, it is an object of the present invention to provide a compressor that is provided to reduce the compression noise while reducing the drive noise by employing a low-speed motor.

Compressor according to the present invention for achieving this object is a drive unit provided with a closed container, a compression mechanism having a compression chamber to perform the compression of the refrigerant, and a low-speed motor of four poles or more to provide a compression power according to the compression of the refrigerant. And, characterized in that it comprises a charging device provided to increase the amount of the refrigerant flowing into the compression chamber.

And the charging device is characterized in that it is provided to receive the driving force of the drive unit to compress the refrigerant in the hermetic container into the compression chamber.

The drive unit may include a stator provided to be fixed to the sealed container, a rotor provided inside the stator, and a rotation shaft press-fitted to the rotor; The compression mechanism further includes a cylinder forming the compression chamber, a piston installed in the compression chamber so as to move forward and backward, and a connecting rod connecting the eccentric shaft portion formed at one end of the rotation shaft and the piston; The supercharging device includes an auxiliary cylinder forming a supercharged chamber, an auxiliary piston installed to move back and forth within the supercharged chamber, an auxiliary connecting rod connecting the eccentric shaft portion and the auxiliary piston, and inside the sealed container and the supercharged chamber. And a discharge passage for communicating between the suction passage and the compression chamber and the compression chamber.

In addition, the auxiliary piston is characterized in that it is provided to reach the top dead center before the piston reaches the top dead center.

In addition, the auxiliary piston is characterized in that it is provided to reach the bottom dead center in the state in which the piston reaches the top dead center, and reaches the top dead center in the state in which the piston reaches the bottom dead center.

In addition, the suction passage and the discharge passage are characterized in that the suction and discharge valves for opening and closing the suction passage and the discharge passage to each other is provided, respectively.

In addition, the driving unit is characterized in that the four-pole motor.

In addition, an oil storage space is formed below the sealed container; The drive unit includes a stator provided to be fixed to the sealed container, a rotor provided inside the stator, and a rotating shaft press-fitted to the rotor, wherein the rotating shaft is configured to supply oil to the rotating shaft and the friction part of the compression mechanism. An oil channel is provided; An oil pick-up member is provided at the lower end of the rotary shaft to communicate the oil storage space with the oil flow path, and a plate-shaped vane is press-fitted inside the oil pick-up member, and at both corners of the bottom of the vane toward the rotation direction of the rotary shaft. Each of the banding bands is provided, and upper and lower corners are provided with bending bands that are bent in opposite directions of rotation of the rotary shaft.

In addition, the driving unit is provided with a four-pole motor, the bending portion is provided on the upper side and a pair of upper bending portion and the lower side having a bending angle of 45 degrees and a pair of lower bending portions having a bending angle of 30 degrees It is characterized by including.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the compressor according to the present invention is an airtight container (1) formed by combining the upper container (1a) and the lower container (1b), and is provided in the sealed container (1) And a compressor unit 10 through which the refrigerant is compressed, and a driving unit 20 that provides compression power according to the compression of the refrigerant, and seals the refrigerant on the evaporator side of the refrigerating cycle on one side and the other side of the sealed container 1. A suction pipe 2 for guiding the inside of the container 1 and a discharge pipe 3 for discharging the refrigerant compressed by the compression mechanism 10 to the condenser side of the refrigeration cycle are discharged to the outside of the sealed container 1.

The dual compression mechanism (10) includes a cylinder (11) in which a compression chamber (11a) is formed to compress a refrigerant, a piston (12) which retreats in the compression chamber (11a) and performs a compression action of the refrigerant, and a compression chamber (11a). ) Is coupled to the cylinder 11 to seal the cylinder head 13 and the refrigerant discharge chamber 13a and the refrigerant suction chamber 13b are partitioned between the cylinder 11 and the cylinder head 13 is provided between the refrigerant It consists of a valve device 14 for interrupting the flow of the refrigerant suctioned from the suction chamber 13b to the compression chamber 11a or discharged from the compression chamber 11a to the refrigerant discharge chamber 13a. The cylinder 11 is formed in the cylinder block 30 is provided on the stator.

In addition, the drive unit 20 provides a driving force to allow the piston 12 to reciprocate in the compression chamber 11a, and includes a stator 21 fixed inside the sealed container 1 and the stator 21. The rotor 22 which is spaced apart from the inside and electromagnetically interacts with the stator 21 and the rotating shaft 23 is pressed into the center of the rotor 22 to rotate together with the rotor 22. It is provided with a conventional motor provided, such a motor is adopted as a four-pole motor provided to have a commercial speed of 1500rpm to 1800rpm at a frequency of 50Hz to 60Hz, for this purpose, a four-pole stator is employed as the stator (21) .

In this way, the drive unit 20 employing the four-pole low speed motor makes the rotation speed of the rotating shaft 23 equal to half of that of the two-pole motor employed in the compressor of a normal refrigeration cycle, thereby greatly increasing the vibration caused by the rotation of the motor. It is to reduce the driving noise of the compressor to a level that can hardly feel outside the sealed container (1).

In addition, the rotation shaft 23 is axially supported by the bearing portion 31 formed in the cylinder block 30 and extends upwardly, and the eccentric shaft portion 24 and the eccentric shaft portion 24 which are eccentrically rotated on the upper portion of the rotation shaft 23. One end of the connecting rod 25 is rotatably coupled to the eccentric shaft portion 24 so that the eccentric rotation thereof may be converted into a linear movement, and the other end of the piston 12 is rotatably and linearly provided.

In addition, a suction muffler 41 is provided between the refrigerant suction chamber 13b and the suction pipe 2 to reduce the flow noise of the refrigerant flowing into the compression chamber 11a, and the refrigerant discharge chamber 13a and the discharge tube. A discharge muffler 42 (see Fig. 2) is formed between the three to form a resonance space for reducing the discharge noise of the refrigerant discharged to the outside of the sealed container 1, the discharge muffler 42 is a cylinder ( 11) together with the cylinder block 30 on one side of the cylinder is formed integrally.

In this configuration, when the rotating shaft 23 is rotated together with the rotor 22 by the electrical interaction between the stator 21 and the rotor 22 according to the power supply, the eccentric shaft portion 24 and the connecting rod ( The piston 12 connected through 25 is linearly reciprocated in the compression chamber 11a, and the refrigerant introduced into the hermetic container 1 from the suction pipe 2 passes through the suction muffler 41. After being introduced into the refrigerant suction chamber 13b of the cylinder head 13 in a state where the noise is somewhat reduced, it is transferred to the compression chamber 11a and compressed inside the compression chamber 11a, and thus compressed in the compression chamber 11a. The refrigerant is discharged back into the refrigerant discharge chamber 13a of the cylinder head 13 and then discharged to the outside of the sealed container 1 through the discharge muffler 42 and the discharge tube 3, and this process is repeated. By the compression of the refrigerant is made.

On the other hand, the cylinder block 30 on the other side of the cylinder 11 is provided with a charging device 50 to increase the amount of refrigerant flowing into the compression chamber (11a), such a configuration of the charging device (50) To compensate for the deterioration of the compression capacity of the compressor according to the reduction of the rotational speed of the rotary shaft 23, the compressor of the present invention employs a low-speed four-pole motor as the drive unit 20, while the refrigerant required in the normal refrigeration cycle The purpose is to satisfy the compression capacity.

In addition, the supercharging device 50 does not flow into the refrigerant suction chamber 13b of the cylinder head 13 via the suction muffler 41 of the refrigerant flowing into the sealed container 1 through the suction pipe 2. By compressing the refrigerant remaining in the sealed container (1) to be delivered to the compression chamber (11a), to increase the amount of refrigerant flow in the compression chamber (11a), such a charging device 50 is a separate drive device It is provided to be driven by receiving the driving force of the drive unit 20 so that the refrigerant inside the sealed container 1 can be compressed and delivered to the compression chamber 11a without being installed, and the structure of the supercharger is shown in FIGS. 3 and 4. When described in detail with reference to as follows.

For reference, FIG. 3 illustrates a state in which the refrigerant inside the sealed container is introduced into the charging chamber, and FIG. 4 illustrates a state in which the refrigerant in the charging chamber is supplied to the compression chamber.

As shown in FIGS. 3 and 4, the supercharger 50 has an internal space that forms a supercharged chamber 51a, and together with the discharge muffler 42, a cylinder 30 opposite the discharge muffler 42 is locked. An auxiliary cylinder 51 integrally provided with the cylinder block 30, an auxiliary piston 52 provided to retreat from the inside of the supercharge chamber 51a and to compress the refrigerant in the supercharge chamber 51a; Is rotatably coupled to the auxiliary piston 52 in a ball joint manner, and the other end thereof is rotatably coupled to the eccentric shaft portion 24 of the rotation shaft 23 together with the connecting rod 25 to be connected to the connecting rod 25. Auxiliary connecting rod 53 provided to form an angle, the suction passage 54 for communicating between the sealed container 1 and the supercharge chamber 51a, and the supercharge chamber 51a and the compression chamber 11a. It is comprised including the discharge flow path 55 which communicates between them.

Here, the suction passage 54 passes through the auxiliary cylinder 51 so as to communicate the supercharge chamber 51a with the sealed container 1, and the discharge passage 55 has the supercharge chamber 51a and the compression chamber 11a. Through the inside of the cylinder block 30 therebetween to communicate between the supercharged chamber 51a and the compression chamber 11a, the outlet of the suction passage 54 and the inlet of the discharge passage 55 is the auxiliary piston 52 Is formed at the closed end of the supercharging side 51a of the top dead center.

In addition, the auxiliary side is provided on the outlet side of the suction passage 54 to open the suction passage 54 when the auxiliary piston 52 moves to the bottom dead center and to close the suction passage when the auxiliary piston 52 moves to the top dead center. When the suction valve 54a is installed, and the auxiliary piston 52 moves to the bottom dead center at the inlet side of the discharge flow path 55, the discharge flow path 55 is closed and the auxiliary piston 52 moves to the top dead center. An auxiliary discharge valve 55a provided to open and close the discharge passage 55 to be opened and closed opposite to the auxiliary suction valve 54a is installed.

In addition, the operation of the piston 12 and the auxiliary piston 52 is provided so that the auxiliary piston 52 can reach the top dead center before the piston 12 reaches the top dead center, and is compressed in the supercharging chamber 51a. The refrigerant must be delivered to the compression chamber 11a before the refrigerant in the compression chamber 11a is discharged into the refrigerant discharge chamber 13a. For the more efficient refrigerant charging, the connecting rod 25 or the auxiliary connecting rod 53 Adjusting the length and its angle, or forming the eccentric shaft portion 24 extending coaxially in two stages different from each other, unlike the drawing to connect the connecting rod 25 and the auxiliary connecting rod 53 at each end of the eccentric shaft portion When the piston 12 reaches the top dead center by combining the ends of the auxiliary piston 52 reaches the bottom dead center, and in the state where the piston 12 reaches the bottom dead center, the auxiliary piston 52 Arrange to reach your top dead center It is provided to be closer to being preferred.

Therefore, in the compressor of the present invention, the refrigerant inside the sealed container 1 compressed by the supercharging device 50 is transferred to the compression chamber 11a when the refrigerant is compressed in the compression chamber 11a by the rotation of the rotary shaft 23. By increasing the flow rate of the refrigerant flowing into the compression chamber (11a), it is possible to prevent the reduction of the compression capacity due to the low-speed rotation of the rotary shaft 23 while employing a four-pole low-speed motor as the drive unit (20).

In addition, referring to FIG. 1 again, an oil storage space 1c for storing a predetermined amount of oil is formed at the bottom of the sealed container 1, and an oil storage space 1 t inside the rotating shaft 23. An oil passage 23a is formed to transfer the oil to the friction portion of the rotary shaft 23 or the compression mechanism 10. An oil storage space 1c and an oil passage 23a are formed at the lower end of the rotary shaft 23. An oil pick-up member 60 for communicating is provided.

The oil pick-up member 60 has an open upper end press-fitted to the lower end of the rotary shaft 23 to be coupled to the rotary shaft 23, and an oil supply hole 61 is formed at the lower center of the oil pick-up member 60. Inside the member 60, plate-shaped vanes 70 are formed to form a vortex between the inner surface of the oil pick-up member 60 to promote the pick-up action of the oil.

Therefore, the oil in the oil storage space 1c is caused by the centrifugal force due to the rotation of the rotary shaft 23 to the friction portion of the rotary shaft 23 or the compression mechanism 10 along the inner surface of the oil pick-up member 60 and the oil passage 23a. And lubrication and cooling.

5 and 6, the vanes 70 have a body portion 71 provided at the center portion, and bending portions 72, 73, 74, which are provided to be bent at each corner of the lower and upper portions. 75, the bending portions 72, 73, 74, 75 are provided at both lower corners of the lower pair of lower bending portions 72, 73 bent and bent to the rotational direction side of the rotation shaft 23, and the upper portion, It is configured to include a pair of upper vanes (74, 75) provided at both corners and bent to the side opposite to the rotation direction of the rotary shaft (23).

The bending parts 72, 73, 74, and 75 are configured to prevent the oil pick-up efficiency from being lowered by the use of a low speed motor, and the oil in the oil storage space 1c can be effectively removed even by the rotating shaft 23 rotating at a low speed. Allow pickup.

That is, the lower bending portions 72 and 73 bent in the rotational direction of the rotary shaft 23 when the rotary shaft 23 rotates, so that oil can be pumped upward more effectively, so that the oil guided upwards is Before being guided to the upper end of the vane 70, it is rapidly pushed vertically through the upper bending portions 74 and 75 so that the pick-up action of oil can be effectively performed even if the rotating shaft 23 rotates at low speed. .

Wherein the lower bending portion (72,73) and the upper bending portion (74,75) is preferably bent to have a bending angle of 30 degrees and 45 degrees, respectively, in consideration of the commercial rotational speed of the four-pole motor, the vanes 70 ) Is press-fitted into the inner surface of the oil pick-up member 60 in a state in which the left and right sides are curved to form a curved surface with respect to the center, and can be fixed in place.

Therefore, the compressor according to the present invention can prevent the degradation of the oil pick-up action due to the low-speed rotation of the rotary shaft 23 while employing a four-pole low-speed motor as the drive unit 20 by improving the structure of the vane (70). .

Next will be described with respect to the operation of the compressor according to the present invention and the resulting effects.

First, when the rotating shaft 23 rotates together with the rotor 22 by the electrical interaction between the stator 21 and the rotor 22 according to the power application, the eccentric shaft portion 24 and the connecting rod 25 are rotated. The piston 12 connected through the linear reciprocating motion in the compression chamber (11a), through which the refrigerant outside the sealed container (1) passing through the suction muffler (30) from the suction pipe (2) is somewhat reduced noise After entering the refrigerant suction chamber 13b of the cylinder head 13 in a state, it is delivered to the compression chamber 11a and compressed in the compression chamber 11a, and the refrigerant compressed in the compression chamber 11a is again a cylinder. After the discharge to the refrigerant discharge chamber (13a) of the head 13 is discharged to the outside of the sealed container 1 through the discharge pipe (3), this process is repeated and the compression of the refrigerant through the compressor is performed.

At this time, the compressor according to the present invention is a state in which the rotational speed of the rotating shaft 23 is reduced by about half as compared to a conventional two-pole motor by the four-pole motor employed as the drive unit 20, so that the vibration caused by the rotation of the motor is wide. The driving noise of the compressor is reduced to a level that is hardly felt outside the closed container (1).

In addition, in the compressor of the present invention, the refrigerant inside the sealed container 1 compressed by the supercharging device 50 is transferred to the compression chamber 11a when the refrigerant is compressed. By increasing the flow rate, it is possible to prevent the reduction of the compression capacity due to the low-speed rotation of the rotary shaft 23 while employing a four-pole low-speed motor as the drive unit 20, and the compressor according to the present invention to the vane 70 The oil pick-up promoting action of the provided bending parts 72, 73, 74, and 75 prevents the oil pick-up action due to the low-speed rotation of the rotating shaft 23 while also adopting a four-pole low speed motor as the driving part 20. You can do it.

For reference, in the present embodiment, the four-pole motor is employed as the driving unit 20, but the driving unit 20 may be provided with various low-speed motors having four or more poles, such as six-pole motors. Compensation of the refrigerant compression capacity according to the adoption of the low speed motor when the combination of the configuration of the supercharger 50 and the method of increasing the diameter of the compression chamber 11a and the piston 12 or the stroke distance of the piston 12, etc. To be more effective.

As described above in detail, the compressor according to the present invention employs a low-speed motor of 4 poles or more as a driving unit, thereby significantly reducing driving noise, thereby enabling quiet operation, and providing the supercharging device, and thus compressing capacity according to low speed rotation of the rotating shaft. The fall can be prevented.

Claims (15)

An airtight container, a compression mechanism having a compression chamber to compress the refrigerant, a drive unit provided with a low-speed motor of four poles or more to provide compression power according to the compression of the refrigerant, and an increase in the amount of refrigerant flowing into the compression chamber. Compressor comprising a charging device provided to make. The method of claim 1, And the supercharging device is configured to compress the refrigerant in the sealed container into the compression chamber by receiving the driving force of the driving unit. The method of claim 2, The drive unit includes a stator provided to be fixed to the sealed container, a rotor provided inside the stator, and a rotating shaft press-fitted to the rotor, The compression mechanism further includes a cylinder forming the compression chamber, a piston installed in the compression chamber so as to move forward and backward, and a connecting rod connecting the eccentric shaft portion formed at one end of the rotation shaft and the piston. The supercharging device includes an auxiliary cylinder forming a supercharged chamber, an auxiliary piston installed to move back and forth within the supercharged chamber, an auxiliary connecting rod connecting the eccentric shaft portion and the auxiliary piston, and inside the sealed container and the supercharged chamber. And a discharge passage communicating with the supercharging chamber and the compression chamber. The method of claim 3, wherein And the auxiliary piston is provided to reach a top dead center before the piston reaches the top dead center. The method of claim 4, wherein And the auxiliary piston is configured to reach a bottom dead center when the piston reaches a top dead center and to reach a top dead center when the piston reaches a bottom dead center. The method of claim 5, And a suction valve and a discharge valve are provided in the suction passage and the discharge passage to open and close the suction passage and the discharge passage in opposition to each other. The method of claim 1, The drive unit is a compressor, characterized in that the four-pole motor. The method of claim 1, An oil storage space is formed below the sealed container; The drive unit includes a stator provided to be fixed to the sealed container, a rotor provided inside the stator, and a rotating shaft press-fitted to the rotor, wherein the rotating shaft is configured to supply oil to the rotating shaft and the friction part of the compression mechanism. An oil channel is provided; An oil pick-up member is provided at the lower end of the rotary shaft to communicate the oil storage space with the oil flow path, and a plate-shaped vane is press-fitted inside the oil pick-up member, and at both corners of the bottom of the vane toward the rotation direction of the rotary shaft. Each of the banding bands are provided, and the upper and both corners are provided with bending bands, each of which is bent in a direction opposite to the direction of rotation of the rotary shaft. The method of claim 8, And the supercharging device is configured to compress the refrigerant in the sealed container into the compression chamber by receiving the driving force of the driving unit. The method of claim 9, The compression mechanism further includes a cylinder forming the compression chamber, a piston installed in the compression chamber so as to move forward and backward, and a connecting rod connecting the eccentric shaft portion formed at one end of the rotation shaft and the piston. The charging device includes an auxiliary cylinder for forming a charging chamber, an auxiliary piston installed in the charging chamber so as to move forward and backward, an auxiliary connecting rod connecting the eccentric shaft portion and the auxiliary piston, and between the sealed container and the charging chamber. And a discharge passage communicating with the suction chamber and the compression chamber. The method of claim 10, And the auxiliary piston is provided to reach a top dead center before the piston reaches the top dead center. The method of claim 11, And the auxiliary piston is configured to reach a top dead center when the piston reaches a bottom dead center and to reach a bottom dead center when the piston reaches a top dead center. The method of claim 12, And a suction valve and a discharge valve are provided in the suction passage and the discharge passage to open and close the suction passage and the discharge passage in opposition to each other. The method of claim 8, The drive unit is a compressor, characterized in that the four-pole motor. The method of claim 8, The drive unit is provided with a four-pole motor, and the bending portion is provided on the upper side and includes a pair of upper bending portions having a bending angle of 45 degrees and a pair of lower bending portions provided on the lower side and having a bending angle of 30 degrees. Compressor, characterized in that.

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