KR200391204Y1 - Scroll compressor having movable balance weight - Google Patents

Abstract

The present invention relates to a scroll compressor having a movable balance weight, which allows the rotation state of the rotor to be optimally maintained, as well as to reduce the size and mass of the balance weight, and to reduce vibration during operation of the compressor. The present invention relates to a scroll compressor having a movable balance weight capable of improving reliability and efficiency. To this end, the present invention provides a casing filled with a predetermined amount of oil therein, a frame fixedly installed in the casing, and two pairs of compression chambers that are continuously engaged with and engaged with a fixed scroll fixed to the frame. A scroll compressor comprising a swing scroll and a drive motor composed of a stator and a rotor to generate a driving force, the scroll compressor comprising: a fixed balance weight fixedly installed on a lower surface of the rotor; It is arranged to be in close contact with the outer circumferential surface of the fixed balance weight and movable movable relative to the lower end surface of the rotor to be moved in a direction spaced from the fixed balance weight by the centrifugal force during the rotation of the rotor It provides a scroll compressor having a movable balance weight, characterized in that configured to include a balance weight.

Description

SCROLL COMPRESSOR HAVING MOVABLE BALANCE WEIGHT}

The present invention relates to a scroll compressor having a movable balance weight, and more particularly, to maintain the optimum rotational state of the rotor as well as to reduce the size and mass of the balance weight. The present invention relates to a scroll compressor having a movable balance weight capable of reducing vibration and improving reliability and efficiency.

Generally, a compressor is a device that compresses a fluid such as refrigerant gas, and the compressor is classified into a rotary compressor, a reciprocating compressor, a scroll compressor, and the like according to a method of compressing the fluid.

The scroll compressor is a high-efficiency low noise compressor widely applied to the air conditioner field, and the two scrolls move relative to each other to form a plurality of compression chambers in pairs between the scrolls, and the compression chamber continuously moves in the center direction to have a volume. As the size decreases, the refrigerant is continuously sucked and compressed and discharged.

1 is a longitudinal sectional view showing the structure of a conventional scroll compressor.

As shown in FIG. 1, the conventional scroll compressor includes a casing having a gas suction pipe SP and a gas discharge pipe DP formed at one side thereof to form a sealed receiving space therein so that refrigerant gas may be sucked and discharged. (11) and the upper frame 12 and the lower frame 13 which are respectively fixed to the upper and lower sides of the inside of the casing 11, and is mounted between the upper frame 12 and the lower frame 13 to generate a rotational force Rotating force of the drive motor 14 is coupled to the rotating scroll 16 to be described later, while being pressed into the center of the rotor 14b, the rotor 14b of the drive motor 14 to pass through the upper frame 12 It has a rotating shaft (17) for transmitting the, and a fixed scroll (15) fixed to the upper portion of the upper frame 12 having an involute-shaped wrap (15a), and an involute-shaped wrap (16a) Two pairs of compression chambers P are formed to engage the scroll 15 and move continuously. It is coupled between the rotating scroll 16 and the rotating scroll 16 to compress the refrigerant while moving relative to the fixed scroll 15, the rotating scroll 16 and the upper frame 12 to prevent the rotation of the rotating scroll (16) It includes an Oldham's ring 18 that swings while being turned.

A shaft hole 12a for radially supporting the rotation shaft 17 is formed in the center of the upper frame 12, and the boss portion 16b of the turning scroll 16 is formed at the upper end of the shaft hole 12a. The boss accommodating groove 12b is extended to be pivotal.

The drive motor 14 includes a stator 14a fixedly installed in the casing 11 and a rotor 14b rotatably installed in the stator 14a.

The rotary shaft 17 is press-fitted to the center of the rotor 14b of the drive motor 14, the upper and lower sides are supported by the upper frame 12 and the lower frame 13, respectively, the upper end of the rotating scroll 16 An eccentric portion 17a is formed so as to be pivoted with respect to the fixed scroll 15 so as to be relatively eccentric from the rotational center and coupled to the bottom of the swing scroll 16 so as to be relatively movable, and a casing 11 at its lower end. A volumetric pump 20 is provided as a pump device for forcibly sucking oil in the tank).

In addition, the oil passage 17b is formed in the rotary shaft 17 along the axial direction so as to lubricate each bearing surface by sucking the oil sucked through the displacement pump 20.

Meanwhile, balance weights 21 and 22 are integrally formed at the upper and lower ends of the rotor 14b along the axial direction of the rotary shaft 17 so as to reduce rotational unbalance generated by the eccentric portion 17a during rotation. It is formed.

A wrap 15a constituting two pairs of compression chambers P is formed in an involute shape on the bottom surface of the hard plate part of the fixed scroll 15, and the suction pressure side space S is provided on the side of the hard plate part through a gas suction pipe SP. _A suction port (not shown) is formed to allow the refrigerant sucked into _ps ) to be sucked into the compression chamber P, and the compressed gas compressed in the final compression chamber P is discharged at the upper pressure center in the upper surface of the hard plate portion S. _A discharge port 15b is formed to be discharged to _pd ).

In addition, the upper surface of the fixed scroll 15 is provided with a check valve 30 for selectively opening and closing the discharge port (15b) to prevent the back flow of the refrigerant gas, the upper portion of the fixed scroll (15) of the casing (11) The high and low pressure separating plate 19 which separates the internal space into the discharge pressure side space S _pd and the suction pressure side space S _ps is combined.

On the upper surface of the hard plate portion of the turning scroll 16, the wrap 16a constituting a pair of compression chambers P together with the wrap 15a of the fixed scroll 15 is formed in an involute shape, and the bottom of the hard plate portion In the center, the boss 16b is formed so that the rotary shaft 17 is coupled to receive the power of the driving motor 14, and the boss 16b is a boss accommodating groove of the upper frame 12. It is inserted into 12b) to make turning motion.

Hereinafter, an operation structure of a conventional scroll compressor having the above structure will be described.

When the power is applied to the drive motor 14, the rotating shaft 17 is rotated with the rotor 14b of the drive motor 14, the orbiting scroll 16 is the upper frame 12 by the old dam ring 18 The pivoting movement is made from the upper surface of the eccentric distance, and the turning scroll 16 continuously forms a pair of compression chambers P between the wraps 15a and 16a with the fixed scroll 15. The compression chamber P is moved to the center by the continuous turning motion of the turning scroll 16 and the refrigerant gas is continuously sucked and compressed as the volume is reduced.

Here, the refrigerant gas is sucked into the suction pressure side space S _ps through the gas suction pipe SP, sucked into the compression chamber P through the suction port, and is compressed, and then discharged through the discharge port 15b of the fixed scroll 15. It is discharged to the pressure side space S _pd , and this refrigerant gas is discharged to a refrigeration cycle system (not shown) through the gas discharge pipe DP.

On the other hand, the oil in the casing 11 is forcibly sucked by the volumetric pump 20 and then sucked up through the oil flow path 17b of the rotary shaft 17 by centrifugal force due to the rotation of the rotary shaft 17, and a part of the upper frame. While lubricating the shaft hole 12a of the part 12, a part is supplied between the thrust bearing surface of the turning scroll 16 and the thrust bearing surface of the upper frame 12, and each bearing surface, and lubrication is performed.

However, in the conventional scroll compressor, when the rotational imbalance caused by the eccentric portion 17a of the rotary shaft 17 during operation of the compressor is increased, the size of the balance weights 21 and 22 is increased along the rotational axis direction. As a result, there was a problem in that the size and mass of the balance weights 21 and 22 were increased accordingly, and interference with peripheral components occurred, which made it difficult to cope.

In addition, among the balance weights of the conventional scroll compressor, the lower balance weight 22 is generally designed to always have a constant rotational balance to be suitable for the representative frequency (60 Hz). If the centrifugal force is reduced or increased, the balance weight 22 can not fully play the role of the original, there is a problem that the vibration is increased, thereby reducing the reliability and efficiency of the compressor.

Therefore, the present invention has been devised to solve the above problems, it is possible to maintain the optimum state of rotation of the rotor, as well as to reduce the size and mass of the balance weight, and to reduce the vibration during operation of the compressor It is an object of the present invention to provide a scroll compressor having a scroll compressor having a movable balance weight which can be reduced to improve reliability and efficiency.

The present invention for achieving the above object is a pair of casings filled with a predetermined amount of oil therein, a frame fixedly installed in the casing, and a fixed scroll fixedly installed in the frame, two pairs of moving in succession A scroll compressor comprising a swing scroll forming a compression chamber and a drive motor composed of a stator and a rotor to generate a driving force, the scroll compressor comprising: a fixed balance weight fixedly installed on a lower end surface of the rotor; It is arranged to be in close contact with the outer circumferential surface of the fixed balance weight and movable movable relative to the lower end surface of the rotor to be moved in a direction spaced from the fixed balance weight by the centrifugal force during the rotation of the rotor Balance weight; characterized in that configured to include.

In addition, any one of the mutually contact surface of the movable balance weight and the rotor is formed with a sliding projection protruding, the other side is characterized in that the sliding groove is formed recessed so that the sliding projection is slidably accommodated.

In addition, a locking jaw is formed at an end portion along the protruding direction of the sliding protrusion so that the flow of the movable balance weight along the axial direction of the rotor is restricted, and the locking jaw is extended to accommodate the locking jaw. Characterized in that the configured locking jaw accommodation portion is formed.

In addition, the movable balance weight is characterized in that it is formed to have an extended size compared to the fixed balance weight.

In addition, one end is fixed to the movable balance weight and the other end is fixed to the fixed balance weight is characterized in that it further comprises a spring member for applying an elastic force in the direction approaching the fixed balance weight.

In addition, the movable balance weight and the fixed balance weight is characterized in that each spring receiving groove is formed so that the spring member is accommodated.

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

Figure 2 is a longitudinal sectional view showing a structure of a scroll compressor having a movable balance weight according to the present invention, Figure 3 is an enlarged view showing the main portion of FIG.

4 to 5 are a perspective view and a plan view showing the structure of the movable balance weight according to the present invention, Figure 6 is a plan view showing the operation structure of the movable balance weight according to the present invention.

However, in describing the present invention, a detailed description of a known function or configuration will be omitted to clarify the gist of the present invention.

Hereinafter, the movable balance weight according to the present invention will be described with an example applied to the drive motor of the scroll compressor.

As shown in Figures 2 to 5, the scroll compressor with a movable balance weight according to the present invention, to form a sealed receiving space therein, but one side of the gas suction pipe (SP) so that the refrigerant gas can be sucked and discharged And a casing 111 having a gas discharge pipe DP, an upper frame 112 and a lower frame 113 fixed to upper and lower sides of the casing 111, respectively, and the upper frame 112. Drive motor 114 is mounted between the lower frame 113 to generate a rotational force, and is pressed in the center of the rotor 114b of the drive motor 114, and also passed through the upper frame 112, the rotating scroll (to be described later) A fixed scroll 115 fixed to an upper portion of the upper frame 112 by a rotation shaft 117 coupled to the 116 and transmitting a rotational force of the driving motor 114, an involute-shaped wrap 115a, and Fixed scroll 115 having an involute wrap 116a A rotating scroll 116 coupled to form a pair of two compression chambers P continuously engaged with each other and compressing the refrigerant while moving relative to the fixed scroll 115, and the rotating scroll 116 and the upper frame. Oldham's ring 118 that is installed between the 112 and prevents the rotation of the rotating scroll 116 and the fixed balance weight 123 is fixed to the bottom surface of the rotor (114b) And the rotor 114b disposed to be in close contact with the outer circumferential surface of the fixed balance weight 123 and to be moved in a direction spaced from the fixed balance weight 123 by centrifugal force during rotation of the rotor 114b. It is comprised including the movable balance weight 124 installed in the lower surface so that relative slide movement is possible.

A shaft hole 112a for supporting the rotation shaft 117 in the radial direction is formed at the center of the upper frame 112, and the boss portion 116b of the turning scroll 116 is formed at the upper end of the shaft hole 112a. The boss accommodating groove 112b is extended to be pivotal.

The drive motor 114 includes a stator 114a fixedly installed in the casing 111 and a rotor 114b rotatably installed in the stator 114a.

The rotary shaft 117 is pressed into the center of the rotor 114b of the drive motor 114, both upper and lower sides are supported by the upper frame 112 and the lower frame 113, respectively, the upper portion of the rotating scroll 116 The eccentric portion 117a is formed to be eccentrically rotated from the center of rotation so as to be pivotable with respect to the fixed scroll 115, and is coupled to the bottom of the turning scroll 116 so as to be relatively movable. The volumetric pump 120 is provided as a pump device for forcibly suctioning oil in the tank).

In addition, the oil passage 117b is formed in the rotary shaft 117 along the axial direction so as to lubricate each bearing surface by sucking the oil sucked through the displacement pump 120.

On the other hand, the upper and lower balance weights of the arc shape having a predetermined height on the upper and lower surfaces of the rotor 114b to reduce the rotational unbalance caused by the eccentric portion 117a during the rotation of the rotary shaft 117 (121, 122) is provided, wherein the lower balance weight 122 is fixed balance weight 123 is fixed to the bottom surface of the rotor (114b) so as to face the eccentric portion (117a), and the fixed It is disposed in close contact with the outer circumferential surface of the balance weight 123 and moved in a direction away from the center of the rotor 114b by the centrifugal force during rotation of the rotor 114b and spaced apart from the fixed balance weight 123. The movable balance weight 124 which is provided in the lower surface of the rotor 114b so that relative slide movement is comprised is comprised.

To this end, a sliding protrusion 125 is protruded from the bottom surface of the rotor 114b, and the rotor 114b so that the sliding protrusion 125 is slidably accommodated on the upper surface of the movable balance weight 124. A sliding groove 127 is formed along the radial direction of the depression.

In addition, a locking jaw 126 is formed at an end of the sliding protrusion 125 along a protruding direction, and the locking jaw accommodation part 128 is extended to accommodate the locking jaw 126 in the sliding groove 127. In this structure, the flow of the movable balance weight 124 along the axial direction of the rotor 114b is constrained and the movable balance weight 124 is moved from the rotor 114b along the rotational axis direction. To prevent it from falling off.

In addition, the movable balance weight 124 is preferably formed to have an extended size compared to the fixed balance weight (123).

In addition, the movable balance weight 124 is connected to the fixed balance weight 123 through the spring member 129 so that the movable balance weight 124 can be elastically supported along the moving direction, the spring member 129 is a tension coil As a spring, one end is fixed to the movable balance weight 124 and the other end is fixed to the fixed balance weight 123 to apply an elastic force so that the movable balance weight 124 can be moved in a direction approaching the fixed balance weight 123. do.

At this time, the spring member 129 is accommodated through the spring receiving grooves (123a, 124a) formed in the movable balance weight 124 and the fixed balance weight 123, respectively.

Here, reference numerals 123b and 114c are fastenings which are formed to communicate with each other on the fixed balance weight 123 and the rotor 114b so that the fixed balance weight 123 may be fixed to the rotor 114b through bolts or rivets. It's a ball.

Meanwhile, a wrap 115a constituting two pairs of compression chambers P is formed in an involute shape on the bottom surface of the hard plate part of the fixed scroll 115, and the suction plate side space is formed on the side of the hard plate part through a gas suction pipe SP. (S _ps) by the suction port to the suction refrigerant to be sucked into the compression chamber (P) (not shown) is formed, and the end plate portion upper surface center apcheuk the compressed pressurized gas to the final compression chamber (P) discharge space A discharge port 115b is formed to be discharged to S _pd .

The top surface of the fixed scroll 115 is provided with a check valve 130 for selectively opening and closing the discharge port 115b to prevent the back flow of the refrigerant gas, the upper portion of the fixed scroll 115 inside the casing 111 The high and low pressure separating plate 119 which separates the space into the discharge pressure side space S _pd and the suction pressure side space S _ps is combined.

On the upper surface of the hard plate portion of the turning scroll 116, the wrap 116a forming two pairs of compression chambers P together with the wrap 115a of the fixed scroll 115 is formed in an involute shape, and the bottom of the hard plate portion In the center, the boss 116b is formed so that the rotation shaft 117 is coupled to receive the power of the driving motor 114, and the boss 116b is a boss accommodating groove of the upper frame 112. 112b) to make pivotal movement.

Hereinafter, the operation structure of the scroll compressor according to the present invention made of a structure as described above are as follows.

When power is applied to the drive motor 114, the rotating shaft 117 rotates with the rotor 114b of the drive motor 114, the turning scroll 116 is the upper frame 112 by the old dam ring 118 In the upper surface of the pivoting movement by an eccentric distance, and the turning scroll 116 is to form a pair of compression chamber (P) in succession between the wrap (115a, 116a) with the fixed scroll 115, The compression chamber P is moved to the center by the continuous turning motion of the turning scroll 116, and the refrigerant gas is continuously sucked and compressed as the volume is reduced.

At this time, the refrigerant gas is sucked into the suction pressure side space (S _ps ) through the gas suction pipe (SP), is sucked into the compression chamber (P) through the suction port is compressed and discharged through the discharge port 115b of the fixed scroll 115 It is discharged to the pressure side space S _pd , and this refrigerant gas is discharged to a refrigeration cycle system (not shown) through the gas discharge pipe DP.

In addition, the oil in the casing 111 is forcibly sucked by the volumetric pump 120 and then sucked up through the oil passage 117b of the rotary shaft 117 by centrifugal force due to the rotation of the rotary shaft 117, and the upper part of the upper frame. While lubricating the shaft hole 112a of 112, a part is supplied between the thrust bearing surface of the turning scroll 116 and the thrust bearing surface of the upper frame 112 and each bearing surface, and lubrication is performed.

Here, the movable balance weight 124 of the lower balance weight 122 is moved away from the center along the radial direction of the rotor 114b by the centrifugal force as the rotor 114b starts to rotate as shown in FIG. 6. The slide is moved to and is spaced apart from the fixed balance weight 123, such a structure allows a relatively large rotational balance force can be secured by allowing the center of gravity to be moved outward as the movable balance weight 123 is moved. do.

In addition, the movable balance weight 124 can be adjusted by the centrifugal force according to the operating frequency of the compressor bar, such a structure is the movement amount of the movable balance weight 124 according to the operating frequency, that is, the movable balance weight 124 By varying the center of gravity and the rotational balancing force suitable for each operating frequency, it is possible to prevent the increase in vibration during the low frequency (30Hz) or high frequency (90Hz) operation of the compressor.

Here, the timing and amount of movement of the movable balance weight 124 spaced apart from the fixed balance weight 123 may be controlled by applying a spring member 129 having an appropriate elastic force according to the capacity and operating conditions of the compressor.

As such, the present invention enables a relatively large rotational balance force to be secured without increasing the size and mass of the lower balance weight 122 as well as allowing the rotation state of the rotor 114b to be optimally maintained. According to the operating frequency of the rotational balancing force is formed accordingly, and the vibration can be reduced, thereby improving the reliability and efficiency of the compressor.

Meanwhile, in the above-described and illustrated embodiments, the present invention has been described with an example applied to the lower balance weight 122, but the above structure may be applied to the upper balance weight 121.

In the above described a preferred embodiment of the present invention by way of example, the scope of the present invention is not limited only to this specific embodiment, it can be changed appropriately within the scope described in the utility model registration claims.

As seen above, according to the scroll compressor having a movable balance weight according to the present invention, it is possible to maintain the rotation state of the rotor optimally, and to reduce the size and mass of the balance weight, By reducing vibration during operation, there is an effect that can improve the reliability and efficiency.

1 is a longitudinal sectional view showing the structure of a conventional scroll compressor;

Figure 2 is a longitudinal sectional view showing the structure of a scroll compressor with a movable balance weight according to the present invention

3 is an enlarged view illustrating main parts of FIG. 2 enlarged.

4 to 5 are a perspective view and a plan view showing the structure of the movable balance weight according to the present invention

Figure 6 is a plan view showing the operating structure of the movable balance weight according to the present invention

<Explanation of symbols for the main parts of the drawings>

111: casing 112,113: frame

114: drive motor 114a: stator

114b: Rotor 115: Fixed scroll

116: turning scroll 117: rotation axis

118: Old Daming 119: high and low pressure separator

121: upper balance weight 122: lower balance weight

123: fixed balance weight 124: movable balance weight

125: sliding projection 126: locking jaw

127: sliding groove 128: hanging jaw accommodation

129: spring member

Claims (6)

A stator and a stator that forms a casing filled with a predetermined amount of oil therein, a frame fixedly installed in the casing, two pairs of compression chambers engaged with the fixed scroll fixedly installed on the frame, and continuously moving; In the scroll compressor comprising a drive motor configured to generate a driving force, the rotor, A fixed balance weight fixedly installed on the bottom surface of the rotor; It is arranged to be in close contact with the outer circumferential surface of the fixed balance weight and movable movable relative to the lower end surface of the rotor to be moved in a direction spaced from the fixed balance weight by the centrifugal force during the rotation of the rotor Balanced weight; Scroll compressor having a movable balance weight, characterized in that comprising a. The method of claim 1, The movable balance weight and the movable balance weight, characterized in that the sliding protrusion is formed on one side of the mutual contact surface of the rotor, the sliding groove is formed in the other side so that the sliding protrusion is slidably accommodated Scroll compressor with a. The method of claim 2, A locking jaw is formed at an end portion along the protruding direction of the sliding protrusion so that the flow of the movable balance weight along the axial direction of the rotor is restricted, and the locking groove is extended to accommodate the locking jaw. Scroll compressor having a movable balance weight, characterized in that the jaw accommodation portion is formed. The method of claim 1, The movable balance weight is a scroll compressor having a movable balance weight, characterized in that formed to have an extended size compared to the fixed balance weight. The method according to any one of claims 1 to 4, One end is fixed to the movable balance weight and the other end is fixed to the fixed balance weight further comprises a spring member for applying an elastic force in a direction approaching the fixed balance weight the movable balance weight is provided with a movable balance weight One scroll compressor. The method of claim 5, And the spring balance grooves are formed in the movable balance weights and the fixed balance weights to accommodate the spring members.