KR20100046598A - Reciprocating compressor and refrigerator having the same - Google Patents

Abstract

PURPOSE: A reciprocation compressor damping the vibration of a casing and a refrigerator which is applied with the same are provided to damping the vibration from a compressor main body by using an anti-vibration member. CONSTITUTION: A casing has a sealed inner space which is filled with oil. A reciprocating motor(300) comprises a movable element and is installed inside the inner space of the casing. A compressive unit(400) is combined in the reciprocating motor and compresses refrigerant. An oil feeder(600) is combined in the compressive unit and pumps the oil to the compressive unit from the casing. An anti-vibration member is installed in the floor side of the casing and damps vibration. An oil storage hole is formed in the center of the anti-vibration member and a reinforcing protrusion is formed in the edge of the anti-vibration member.

Description

Reciprocating compressor and refrigerating machine using it {RECIPROCATING COMPRESSOR AND REFRIGERATOR HAVING THE SAME}

The present invention relates to a reciprocating compressor and a refrigerating machine using the same, and more particularly, to a technology for filtering foreign substances in oil while damping vibration of a casing.

In general, a reciprocating compressor is a method in which a piston sucks and compresses a refrigerant while reciprocating in a straight line in a cylinder. The reciprocating compressor may be classified into a connection type and a vibration type according to the piston driving method. The connected reciprocating compressor is a method in which the piston is connected to the rotating shaft of the rotating motor by a connecting rod to compress the refrigerant while reciprocating in the cylinder. On the other hand, the vibration-type reciprocating compressor is a method in which the piston is connected to the mover of the reciprocating motor to vibrate and compress the refrigerant by reciprocating in the cylinder. The present invention relates to a vibration type reciprocating compressor, hereinafter referred to as a vibration type reciprocating compressor.

The reciprocating compressor repeats a series of processes of sucking, compressing and discharging the refrigerant while the piston and the cylinder move relative to each other along the direction of the magnet flux of the reciprocating motor. In this process, the oil filled in the casing is supplied to the lubricating surface between the cylinder and the piston through an oil peter.

However, in the conventional reciprocating compressor as described above, vibration is generated in a series of processes for compressing the refrigerant, which is finally transmitted to the casing and released to the outside. In particular, when a high-pressure refrigerant such as R134a is applied, the compressor vibration is aggravated, and thus it is difficult to attenuate the vibration noise of the compressor by only changing the design of the compression unit.

In addition, in the process of manufacturing the compressor, by-products such as welding pieces are generated, and the by-products may be immersed in oil and flow into the lubrication surface between the cylinder and the piston through the oil feeder. However, these by-products may wear down the lubricating surface between the cylinder and the piston, which may reduce the reliability of the compressor or cause friction loss.

The present invention solves the problems of the conventional reciprocating compressor as described above, and effectively attenuates the vibration transmitted to the casing and at the same time prevents foreign substances submerged in the oil in the casing from entering the oil feeder, thereby damping vibration noise and reliability. It is an object of the present invention to provide a reciprocating compressor and a refrigerating apparatus using the same that can increase the efficiency.

In order to achieve the object of the present invention, the casing having a sealed inner space and a certain amount of oil is filled in the inner space; A reciprocating motor installed in the inner space of the casing, and the mover linearly reciprocating; A compression unit coupled to the reciprocating motor to compress the refrigerant; An oil feeder coupled to the compression unit to pump oil of the casing into the compression unit; And an anti-vibration member installed on the bottom surface of the casing to damp vibrations, wherein the oil storage hole is formed at the central portion of the anti-vibration member to be tightly fixed to the bottom surface of the casing. There is provided a reciprocating compressor having a reinforcement protrusion formed to be spaced apart from the bottom by a predetermined distance.

In addition, a compressor; A condenser connected to the discharge side of the compressor; An expander coupled to the condenser; And an evaporator connected to the inflator and connected to the suction side of the compressor, wherein the compressor is provided with a dustproof member having a storage hole and a reinforcement protrusion at a bottom surface of the casing.

In the reciprocating compressor according to the present invention and the refrigerating device to which the same is applied, vibration is generated from the main body of the compressor by canceling the vibration member on the bottom surface of the casing to reduce the noise of the compressor and the refrigerating device to which the same is applied. have. In addition, the dustproof member prevents the by-products generated when the compressor is assembled into the compressor main body together with the oil, thereby increasing the reliability of the compressor and the refrigerating apparatus to which the dustproof member is applied.

Hereinafter, the reciprocating compressor and the refrigerator according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the reciprocating compressor according to the present invention includes a casing 10 through which a gas suction pipe SP and a gas discharge pipe DP communicate with each other, and a frame unit elastically supported inside the casing 10. 20, the reciprocating motor 30 supported by the frame unit 20 to be described later to reciprocate in a straight line, and the mover 33 of the reciprocating motor 30 will be described later. The piston 42 is coupled to the compression unit 40 which is supported by the frame unit 20, the mover 33 of the reciprocating motor 30 and the piston 42 of the compression unit 40 in the movement direction A plurality of resonant units 50 to elastically support and induce a resonant movement, and coupled to the frame unit 200 and vibrated together to pump the oil of the casing 100 to supply to the compression unit 400 And a feeder 600.

The casing 100 is a lower cap 110 for elastically supporting the compressor body consisting of the frame unit 200, the reciprocating motor 300, the compression unit 400, the resonance unit 500 and the oil feeder 600. And an upper cap 120 covering the upper opening of the lower cap 110 to form a closed space. The gas suction pipe SP and the gas discharge pipe DP are coupled to the rear side of the lower cap 110, and the gas discharge pipe DP is connected to the compression unit 400 by a loop pipe RP to be described later. Is connected to the discharge cover 460.

The frame unit 200 is coupled to the first frame 210 and the first frame 210, the compression unit 400 is supported and supports the front side of the reciprocating motor 300, the reciprocating motor ( The second frame 220 supporting the rear side of the 300 and the third frame 230 coupled to the second frame 220 to support the plurality of second resonant springs 530 to be described later. The frame unit 200 is elastically supported on the bottom surface of the casing 100 by supporting springs 720 at both front and rear sides thereof, that is, at four locations in planar projection.

The reciprocating motor 300 is supported between the first frame 210 and the second frame 220 and the outer stator 310, the coil 311 is wound, and a predetermined interval inside the outer stator 310 The inner stator 320 is inserted into and installed in the first cylinder part 470 to be described later, and the magnet 331 is provided to correspond to the coil 311 of the outer stator 310. ) And the mover 330 reciprocating in a straight line along the magnetic flux direction between the inner stator 320. The outer stator 310 and the inner stator 320 are formed by stacking a plurality of thin stator cores in a cylindrical shape by sheet or stacking a plurality of thin stator cores in a block shape to radially stack the stator blocks.

The compression unit 400 is coupled to the cylinder 410 fixed to the first frame 210 and the mover 330 of the reciprocating motor 300 in the compression space (P) of the cylinder 410 A piston 420 for reciprocating movement, a suction valve 430 mounted to the front end of the piston 420 to control the suction of refrigerant gas while opening and closing the suction passage 421 of the piston 420, and the cylinder A discharge valve 440 mounted on the discharge side of the 410 to control the discharge of the compressed gas while opening and closing the compression space P of the cylinder 410, and a valve spring for elastically supporting the discharge valve 440 ( 450 and a discharge cover 460 fixed to the first frame 210 at the discharge side of the cylinder 410 to accommodate the discharge valve 440 and the valve spring 450. One side of the discharge cover 460 is connected so that the loop pipe (RP) is in communication, the loop pipe (RP) is connected to the gas discharge pipe (DP) is installed.

The resonator unit 500 includes a spring supporter 510 coupled to a connection between the mover 330 and the piston 420, and first resonant springs 520 supported at the front side of the spring supporter 510. And second resonant springs 530 supported on the rear side of the spring supporter 510.

The oil feeder 600 is inserted into the oil cylinder 610 installed between the first frame 210 and the second frame 220, and the oil cylinder 610 relative to the oil cylinder 610. It includes an oil piston 620 to exercise, and an oil valve 630 to open and close the inlet and outlet of the oil cylinder 610 to pump the oil.

The oil cylinder 610 is formed in a cylindrical shape having a suction port and a discharge port at each end, the suction port is formed downward in the vertical direction toward the bottom surface of the casing, the discharge port is the first frame 210 It is formed upward in the vertical direction so as to communicate with the oil passage 215 provided in the. The suction port may be manufactured separately from the oil suction pipe 640, or may be integrally formed with the oil cylinder. And the suction port may be formed to be located approximately in the center of the casing bottom surface.

The oil piston 620 is slidably inserted from the oil cylinder 610 to move relative to the oil cylinder 610 in response to the vibration of the compression unit 400 or the oil piston 620. Oil springs are further provided on both sides of the front and rear sides so as to be able to elastically move relative to each other.

The reciprocating compressor according to the present invention as described above is operated as follows.

That is, when power is applied to the reciprocating motor 300 to form a magnetic flux between the outer stator 310 and the inner stator 320, the gap between the outer stator 310 and the inner stator 320 lies in the gap. The mover 330 is continuously reciprocated by the resonance unit 500 while moving in the direction of the magnetic flux. When the piston 420 moves backward in the cylinder 410, the refrigerant filled in the inner space of the casing 100 is sucked into the suction passage 421 of the piston 420 and the suction valve 430. And is sucked into the compression space P of the cylinder 410. When the piston 420 moves forward in the cylinder 410, the refrigerant gas sucked into the compression space P is compressed to be discharged while opening the discharge valve 440. Through the discharge cover 460 and the loop pipe RP is repeated a series of processes discharged to the condenser of the refrigeration cycle.

At this time, while the piston 420 in the cylinder 410 reciprocating in a straight line vibration in the front and rear direction is generated, the vibration is transmitted to the oil feeder 600 through the frame unit 200 and the oil feeder Pumping force at 600 is generated. By the oil pumping force, the oil of the casing 100 is supplied between the cylinder 410 and the piston 420 through the oil passage 215 of the oil cylinder 610 and the first frame 210. Oil will lubricate between the cylinder 410 and the piston 420.

On the other hand, the vibration generated by the reciprocating motion in the reciprocating motor 300 and the compression unit 400 or the vibration generated by the opening and closing operation of the suction valve 430 and the discharge valve 440 is the loop pipe ( RP) is transmitted to the casing 100, the vibration may be emitted in the form of noise through the casing (100). However, when the dustproof member 800 is installed on the bottom surface of the casing 100 as shown in Figs. 1 and 2, the vibration, that is, the vibration generated in the compressor main body and transmitted to the casing 100, is dustproofed. Offset by the member 800 to remove the vibration noise of the compressor. In addition, the dustproof member 800 prevents a by-product generated during assembly of the compressor, that is, welding pieces generated while welding the lower cap 110 and the upper cap 120 and the like into the oil feeder together with oil. can do.

To this end, the anti-vibration member 800 is formed in a substantially circular plate shape when projecting the plane, the bottom portion of the bottom of the lower cap 110 is fixed in close contact with the bottom of the bottom cap 110 is formed, the edge thereof Is spaced apart from the bottom surface of the lower cap 110 by a predetermined interval is formed a reinforcement protrusion 820 bent outward. The dustproof member material 800 may be fixed to the lower cap by welding (W) at least three places on the bottom surface thereof, and four places in the drawing. The dustproof member 800 may be preferably welded on the concentric circle to increase the welding strength.

The oil storage hole 810 is an area in which the end of the oil absorption pipe 640 of the oil feeder 600 is inserted into a predetermined amount and vibrates, that is, the oil storage hole 810 has an inner diameter of the oil feeder 600. It is preferable to form larger than the outer diameter of the inlet end.

In addition, a position corresponding to a vertical direction with respect to the end of the oil feeder 600 of the oil feeder 600, that is, the center A of the oil storage hole 810 may be the center B of the oil feeder 640 when the compressor is stopped. When the oil feeder 600 is vibrated, the oil storage hole 810 has an inner diameter whose outer diameter is the reciprocating distance of the mover of the reciprocating motor. It is preferably formed not smaller than the combined length.

As shown in FIG. 5, the reinforcement protrusion 820 has a height, that is, a height h1 from the bottom surface of the lower cap 110 to the upper surface of the reinforcement protrusion 820 is oil at the bottom surface of the lower cap 110. It may be desirable to be formed so as not to be lower than the gap height (h2) to the inlet end of the oil absorption pipe 640 of the feeder 600 to prevent the infiltration of foreign matter and oil is sucked smoothly. In addition, at least one protrusion 821 may be formed on the outer circumferential surface of the reinforcement protrusion 820 so as to more effectively cancel the vibration transmitted to the lower cap 110.

As described above, in the reciprocating compressor equipped with the anti-vibration member according to the present invention, the vibration generated from the compressor main body and transmitted to the casing 100, in particular the lower cap 110, is provided in the anti-vibration member 800. By offset by the vibration noise by the compressor main body can be prevented from being released to the outside of the casing (100). In particular, the dustproof member 800 may attenuate vibration noise of a desired band by using the shape or thickness thereof. For example, the vibration of the 5 kHz band, which is the vibration of a specific band transmitted to the lower cap 110, can be effectively attenuated.

In addition, even if the by-products generated during the assembly of the compressor is mixed with the oil to be immersed in the oil, the by-products are separated from the oil being pumped by the reinforcing protrusion 820 of the dustproof member 800, the cylinder 410 and the piston Foreign matter, such as welding by-products, may be introduced between 420 to prevent wear or frictional loss.

On the other hand, when the reciprocating compressor according to the present invention is applied to a refrigerator, the efficiency of the refrigerator can be improved.

For example, in the refrigerating device 900 having a refrigerant compression refrigeration cycle including a compressor, a condenser, an expander and an evaporator as shown in FIG. 7, the main board 910 controls the overall operation of the refrigerating device. ) Is connected to the reciprocating compressor (C), and the dustproof member having a reservoir and a reinforcement at the bottom surface of the casing, as in the above-described embodiments, the cylinder installed inside the reciprocating compressor (C) Can be installed.

In this way, the vibration generated by the compressor body and attenuated by the vibration transmitted to the casing of the compressor can reduce vibration noise of the compressor and the refrigerating apparatus to which the compressor is applied. In addition, by-products generated during assembly of the compressor may be prevented from flowing into the compression unit together with the oil, thereby increasing the reliability and efficiency of the compressor and the refrigerating apparatus to which the compressor is applied.

The reciprocating compressor of the present invention can be widely used in a refrigeration machine such as a refrigerator or an air conditioner.

1 is a cross-sectional view showing a reciprocating compressor of the present invention;

Figure 2 is a plan view showing a lower cap welded to the dustproof member in the reciprocating compressor according to Figure 1,

Figure 3 is a perspective view showing a dustproof member in the reciprocating compressor according to Figure 1,

4 is a plan view showing the dustproof member according to FIG.

Figure 5 is a longitudinal cross-sectional view showing a state in which the dustproof member according to Figure 1 welded to the lower cap,

Figure 6 is a schematic view showing a refrigeration machine equipped with a reciprocating compressor according to FIG.

** Description of symbols for the main parts of the drawing **

100: casing 110: lower cap

120: upper cap 200: frame unit

300: reciprocating motor 400: compression unit

600: oil feeder 640: oil absorption pipe

800: dustproof member 810: oil storage hole

820: reinforcement protrusion 821: extension protrusion

Claims (9)

A casing having a sealed inner space and filled with a certain amount of oil in the inner space; A reciprocating motor installed in the inner space of the casing, and the mover linearly reciprocating; A compression unit coupled to the reciprocating motor to compress the refrigerant; An oil feeder coupled to the compression unit to pump oil of the casing into the compression unit; And And a dustproof member installed on the bottom surface of the casing to damp vibration. Reservoir compressor is formed in the central portion of the anti-vibration member is formed in the bottom of the casing is tightly fixed, the edge of the anti-vibration member is formed with a reinforcement protrusion to be spaced apart by a predetermined distance from the bottom surface of the casing. The method of claim 1, The oil storage hole of the vibration isolator is formed in a position corresponding to the vertical direction with respect to the inlet end of the oil feeder. The method of claim 2, And the center of the oil hole is formed at a position substantially coincident with the center of the inlet end of the oil feeder when the compressor is stopped. The method of claim 1, The oil storage hole of the vibration isolator reciprocating compressor of which the inner diameter is formed larger than the outer diameter of the inlet end of the oil feeder. The method of claim 4, wherein And the oil storage hole of the dustproof member is formed such that an inner diameter thereof is not smaller than the length of the outer diameter of the inlet end of the oil feeder and the reciprocating distance of the mover of the reciprocating motor. The method of claim 1, And an inlet end of the oil feeder is inserted into the oil storage hole of the dustproof member when the compressor is stopped. The method of claim 1, And a height from the bottom of the casing to an upper surface of the reinforcing protrusion of the dustproof member is not lower than a gap height from the bottom of the casing to the inlet end of the oil feeder. The method of claim 1, At least one protrusion is formed on the outer peripheral surface of the reinforcing protrusions reciprocating compressor. compressor; A condenser connected to the discharge side of the compressor; An expander coupled to the condenser; And And an evaporator connected to the inflator and connected to the suction side of the compressor. The compressor comprises a compressor of any one of claims 1 to 8.

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