JPH04128583A - Scroll compressor - Google Patents

Abstract

PURPOSE:To prevent the unbalanced vibration caused by an Oldham's ring by providing a member reciprocated in the phase separated 180 deg.C from that of the Oldham's ring in a scroll compressor inserted with the Oldham's ring preventing the rotation of a rotary scroll between the rotary scroll and a frame. CONSTITUTION:Two projections 4c provided at 180 deg.C symmetrical positions on the upper face of an Oldham's ring and two projections 4d provided at symmetrical positions perpendicular to them on the lower face are inserted into a groove 2c provided on the lower face of a rotary scroll 2 and a groove 5d provided on a frame 5 respectively. The rotary scroll 2 is revolved with respect to the frame 5. A crank section 3b is formed apart from a pin section 3a by 180 deg.C below the pin section 3a of a crank shaft 3, and the boss section 9b of a balance weight 9 is inserted into the crank section 3b. A balance ring 10 is inserted into a groove 9e on the upper face of the balance weight 9, and a projection 10d is inserted into the groove 5d of the frame 5 respectively for assembling.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a scroll compressor, for example. The present invention relates to a scroll compressor suitable for eliminating unbalanced vibrations of an Ordal ring in a compressor used in a refrigerator such as an air conditioner or a refrigerator.

[Conventional technology]

The structure of a conventional scroll compressor will be explained with reference to FIG. FIG. 12 is a vertical cross-sectional view showing the main parts of a conventional scroll compressor. It is formed by engaging the scrolls 2 with the scroll wraps facing inward, and the orbiting scroll 2 compresses the refrigerant gas by orbiting at a constant radius. The orbiting motion of the orbiting scroll 2 is obtained from the crankshaft 3 and the ordal ring 4. Its structure is as follows. The crankshaft 3 is supported by a frame 5, and a rotor 6 of a motor is fitted onto the crankshaft 3 by a shrinkage spring, press fit, or the like. Further, the frame 5 is coupled to the fixed scroll 1 by bolts or the like (not shown). Therefore, the crankshaft 3 is rotated by the force generated by the motor, and the eccentric part provided at the end rotates the crankshaft 3.
A constant turning radius is given to the rotating scroll 2. The Oldham ring 4 is necessary to prevent the orbiting scroll 2 from rotating around the axis due to gas force, and reciprocates with the frame 5 with an amplitude equal to the radius of rotation. Here, as a structure for preventing rotation of the orbiting scroll 2, a bin crank mechanism can be used instead of the Oldham ring 4, but the Oldham ring is a mechanism that can absorb misalignment of the axis and is more reliable. Therefore, it is widely used. The scroll compressor compresses refrigerant gas with the above configuration, but in order to remove a disproportionate amount of hair caused by the orbiting of the orbiting scroll, etc., and reduce the vibration of the compressor, the orbiting scroll 2 and the frame 5 are A pump part balance weight 7 is fitted onto the crankshaft 3 between the pump part and the bearing part, and a motor part balance weight 8 is further provided on the rotor 6 of the motor. Such a conventional balance mechanism is disclosed, for example, in "Enclosed Scroll" published by Japan Refrigeration Association, "Refrigeration", Vol. 62, No. 720 (published October 1988), pages 70-75. [Problems to be Solved by the Invention] When using an Oldham ring to prevent rotation of an orbiting scroll, it has been structurally impossible in the prior art to completely remove unbalanced components. This is because, in addition to the unbalanced rotational component due to the movement of the eccentric portion of the crankshaft, the orbiting scroll, etc., there is the unbalanced component of the reciprocating motion based on the movement of the Oldham ring. Conventionally used balance weights are for the rotational unbalance component, so the unbalance component of the reciprocating motion can only be converted into a rotational unbalance amount of half of the unbalance component. The present invention has been made in order to solve the problems of the prior art. The purpose of this invention is to eliminate unbalanced vibration caused by the Oldham ring reciprocating within the scroll compressor5, and to provide a scroll compressor that exhibits low vibration even during high-speed rotation. Furthermore, as shown in FIG. 12, in the conventional technique, since the pump part balance weight 7 rotates within the frame 5, it is necessary to bore the frame 5 leaving a portion supported by the Oldham ring 4. There was a problem that the processing cost of the frame 5 was high. Another object of the present invention is to reduce the processing cost of the frame without the need for boring, and to omit piping and vibration-proofing materials when the compressor is used in air conditioners, refrigeration systems, etc. An object of the present invention is to provide a scroll compressor that can reduce the cost of production. [Means for Solving the Problems] In order to achieve the above object, a first aspect of the scroll compressor of the present invention has a fixed scroll and an orbiting scroll whose scroll wraps are engaged with each other to form a compression chamber. a crankshaft that has an eccentric portion to which the orbiting scroll is mounted and that transmits the rotational force of the electric motor to revolve the orbiting scroll; a frame that supports the crankshaft and is coupled to the fixed scroll; In a scroll compressor having an Oldham ring interposed between the frame and the orbiting scroll to prevent rotation of the orbiting scroll, the scroll compressor is located close to the eccentric part of the crankshaft and in a direction 180'' out of phase with the eccentric part. A second eccentric portion is provided, a balance weight that rotates around the crankshaft in an opposite phase to the orbiting scroll is attached to the second eccentric portion, and a member for preventing rotation is provided on the balance weight. The balance weight is 180″ with respect to the orbiting scroll.
It revolves around the crankshaft without rotating on its own axis with a shifted phase. More details, please. The member that prevents the rotation of the balance weight is a ring-shaped balance ring, and when the balance ring is located in the same plane as the Oldham ring, and the centers of gravity of both move back and forth on the same straight line in opposite phases, The unbalance amount based on the reciprocating motion is set to be the same amount. A more specific description of the structure of the invention No. C above is as follows. The present invention provides a crankshaft for a scroll compressor that uses an Oldham ring mechanism to prevent rotation of an orbiting scroll.
Between the main bearing part of the crankshaft (the bearing part where the crankshaft is supported by the frame) and the bin part (first eccentric part) that makes the orbiting scroll rotate (revolution), there is a The shaft structure has a crank part (second eccentric part), and a balance weight that rotates in the opposite phase to the orbiting scroll is attached to this crank part, and a ring-shaped member is installed as a member to prevent the balance weight from rotating. A balance ring is provided, and this balance ring is reciprocated in the same straight line as the Oldham ring and in an opposite phase. In other words, the balance weight does not rotate. It revolves around the crankshaft with a phase 180@ out of phase with the orbiting scroll. In addition, in order to achieve the above object, the configuration of the second invention related to the scroll compressor of the present invention is based on the eccentricity of the crankshaft that drives the orbiting scroll, with the same prerequisites as the prerequisites of the first invention described in L. 18 with the eccentric part adjacent to the part.
A second eccentric portion is provided in a direction with a 0″ phase shift, and a substantially ring-shaped balance ring that can reciprocate only in the same direction as the Oldham ring with respect to the frame is provided in the same plane as the Oldham ring. The second eccentric part of the crankshaft is constantly in contact with a part of the balance ring or a part of the member fixed to the balance ring, so that the balance ring runs on the same straight line as the Oldham ring. The balance ring Q is set so that it moves forward in opposite phases and the amount of unbalance based on the reciprocating motion of both is the same.More specifically, the movement direction of the balance ring Q is restricted to one direction within the frame. As a means for this, the balance ring is indirectly guided by an alternating ring that moves along a groove provided in the frame. The structure of the bin part (first eccentric part) and crank part (second eccentric part) provided on the crankshaft in order to rotate (revolution) the orbiting scroll and the balance weight with a phase shift of 180 degrees. As such, the bottle part (first eccentric part) of the crankshaft has a bearing structure, that is, a hole shape, and the crank part (second eccentric part) has a bearing structure, that is, a hole shape.
There is a way to install it inside. That is, the orbiting scroll is provided with a detail, which is rotated by the eccentric hole (first eccentric part) provided at the # end of the crankshaft, and the crank part (first eccentric part) eccentric in the opposite direction outside the eccentric hole. The balance weight is rotated by the eccentric part 2), and the orbiting scroll and the alternating ring and the balance ring, which prevent rotation of the balance weight, reciprocate on the same straight line with a phase shift of 180 degrees. In addition, as a means of reciprocating the balance ring in the opposite phase to the Oldham ring, the balance ring can be moved in a groove in the frame or parallel to the Oldham ring so that the direction in which the balance ring can move is the same as the Oldham ring. A part of the balance ring and a crank part (second eccentric part) in the opposite direction to the bottle part provided on the crankshaft. In addition, as a structure that maximizes the effects of the present invention, the balance ring is made of a material with a higher density than the Oldham ring material, and the Ring unbalance amount (
The product of the amplitude of the reciprocating motion and the mass of each ring) is made to have the same magnitude. [Operation] The plow according to the technical means of the first invention is as follows. The orbiting scroll inserted into the bin part (first eccentric part), which is the tip of the crankshaft, revolves (revolutions) at a radius corresponding to the eccentricity of the bin part due to the rotation of the crankshaft.
The Oldham ring, which is provided to prevent the orbiting scroll from rotating, reciprocates with respect to the orbiting scroll with an amplitude equal to the radius of rotation, and also reciprocates with respect to the frame supporting the crankshaft in a direction perpendicular to the reciprocation. In the present invention, a crank part (second eccentric part) that is eccentric in the opposite direction to the eccentric direction of the bin part is provided between the bin part of the crankshaft and the main bearing part, so that the crank part is inserted into the crank part. The balance weight rotates symmetrically around the crankshaft relative to the orbiting scroll, and the balance ring is a member that prevents the balance weight from rotating.
It reciprocates with respect to the balance weight, and also reciprocates with respect to the frame perpendicular to it. In the present invention, the direction in which the balance ring reciprocates is the same as the direction in which the Oldham ring reciprocates, so that both reciprocate in the same direction but in opposite phases. Therefore, the structure is such that the amount of unbalance caused by the reciprocating motion of the Oldham ring can be balanced by the reciprocating link vJ&- by the balance ring. At this time, by making the balance ring reciprocate on the same plane as the Oldham ring, the centers of gravity of the balance ring and Oldham ring reciprocate on almost the same straight line, resulting in both static and dynamic balance. can be taken. In addition, the crank part (which drives the orbiting scroll through an eccentric hole at the end of the crankshaft and drives the balance weight in the opposite phase)
Even in the case of a structure in which the second eccentric portion (second eccentric portion) is provided outside the eccentric hole in the opposite direction, the balance ring operates in the same manner as described above. Furthermore, the function when the balance ring is directly reciprocated by the crankshaft without using a balance weight, which is the technical means of the second invention of the present invention, is as follows. The balance ring is similar to the above-mentioned one (equipped with a rotating balance weight), and there is a means for inserting the balance ring into a groove that regulates the direction of movement of the Oldham ring within the frame, and a means for inserting the balance ring into a groove that regulates the direction of movement of the Oldham ring, and a means for inserting the balance ring into a groove that regulates the direction of movement of the Oldham ring. The direction of the reciprocating movement of the balance ring is made to coincide with the direction of the balance ring by means of bringing the balance ring into contact with a parallel surface or the like. Furthermore, the crank part (second eccentric part) provided on the fifth crankshaft is always in contact with a part of the balance ring. Due to the rotation of the crankshaft, the crank part (second eccentric part)
The balance ring moves in the same direction as the Oldham ring with an amplitude equal to the eccentricity of . At this time, the eccentric direction of the crank part (second eccentric part) provided on the crankshaft is
Since it is in the opposite direction to the bin part (first eccentric part consisting of a shaft or hole) that drives the orbiting scroll, the balance ring always reciprocates in the same direction as the Oldham ring in the opposite direction within the same plane. Become. Therefore, the amount of unbalance due to the reciprocating motion of the Oldham ring can be perfectly balanced. Furthermore, an effective means of completely matching the amount of unbalance between the balance ring and the Oldham ring is to make the material of the balance ring larger and denser than the material of the Oldham ring, as described above. It can be made into a smaller shape than the Oldham ring, and it is possible to easily create a structure that has the same amount of unbalance with the opposite phase.In addition, in the present invention, the structure in which the balance weight does not rotate but rotates around its axis is the Oldham ring of the frame. A large balance weight can be placed for 1 yen without boring the lower part of the support part. [Embodiments] Each embodiment of the present invention will be described below with reference to FIGS. 1 to 9. Embodiment 1 First, an embodiment of the first invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of a scroll compressor pump portion according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line I-I in FIG. 1, and FIG. 3 is used in FIG. 1. It is a perspective view which shows each part exploded. First, the shape and structure of each component used in this example will be explained with reference to FIG. 3 indicates the main part of the crankshaft. The crankshaft 3 is supported within the compressor by a frame 5. Reference numeral 2 designates an orbiting scroll, which has a spiral blade (scroll wrap) 2a and a boss portion 2b indicated by a broken line in the figure on the opposite lower side, and this boss portion 2b is connected to the crankshaft. It is attached to the bottle part 3a related to the first eccentric part of No. 3. As a result, the orbiting scroll 2 rotates with the eccentricity of the bin portion 3a as the crankshaft 3 rotates. Reference numeral 4 denotes an Oldham ring. This Oldham ring 4 has a shape similar to that used in conventional compressors, and has two protrusions 4c at symmetrical positions of ]80° on the upper surface. , two protrusions 4d are provided on the lower surface at symmetrical positions orthogonal thereto. The protrusion 4c has a groove 2c on the lower surface of the orbiting scroll 2 (in FIG. 3, the orbiting scroll 2
(portion indicated by a broken line), and the protrusion 4d is inserted into a groove 5d provided in the frame 5. Therefore, when the crankshaft 3 rotates, the Oldham ring 4 reciprocates along the groove 5d of the frame 5 with an amplitude equal to the eccentricity of the pin portion 3a provided on the crankshaft 3. Therefore, the orbiting scroll 2 reciprocates on the Oldham ring 4 with the same amplitude in a direction orthogonal thereto, with a phase shift of 90', and thus performs a revolution movement with a radius equal to the eccentricity with respect to the frame 5. The parts and configuration described above are the same as those of the prior art, but in addition, the scroll compressor of this embodiment has the following configuration. A crank part 3b related to the second eccentric part is formed below the bin part 3a of the crankshaft 3, shifted by 180'' from the bin part 3a.The boss part 9b of the balance weight 9 is fitted into this crank part 3b. 10 is a balance ring, which has four protrusions i on the bottom surface.
It has 0d and 10e. Among these, the protrusion 10e is inserted into the groove 9e provided on the upper surface of the balance weight 9, and the other protrusion 10d is inserted into the protrusion 4d of the Oldham ring.
It is inserted into the groove 5d of the frame 5 in the same way. Due to these combinations, when the crankshaft 3 rotates. The balance weight 9 is 180° with the orbiting scroll 2
The balance ring 10 revolves around the crankshaft with a phase shift, and the balance ring 10 reciprocates along the groove 5d of the frame 5 with a phase shift of 180'' from the Oldham ring 4. In FIG. A vertical cross-sectional view of the pump section incorporating parts is shown.Hereinafter, the same reference numerals as in Fig. 3 indicate the same parts, and the explanation will be omitted.As shown in Fig. 1, the balance ring]-〇 is e!F on the plane 5f provided with the groove in the guard frame 5 together with the Oldham ring 4, and its movement in the vertical direction is regulated between it and the lower surface 2f of the orbiting scroll 2. 1 is a cross-sectional view taken along the line I-I in FIG. When the crank @3 rotates from the position shown, the rings move in opposite directions to each other in the direction of the arrow shown in Figure 2.6 Point 0 shown in Figure 2 is the center of rotation of the crankshaft 3; Point A is the center of the circle of the bottle part 3a shown in FIG. 1, and point B is the center of the circle of the crank part 3b fitted into the balance weight 9. Therefore, the distance M1 between point ○ and point A is The distance 1l12 between point 0 and point B is the radius of revolution of balance weight 9.Here, if the mass of Oldham ring 4 is Ml and the mass of balance ring 10 is M2, then Oldham ring The conditions for canceling the unbalance due to the reciprocating motion of 10 are as follows: M = 1. = M, 1□... (1).
If it is smaller and lighter in terms of space compared to
In the case of M, <Ml, equation (1) can be satisfied and balanced by increasing the radius of the reciprocating movement of the balance ring 10, that is, by setting ■□>lX. In addition, by making the density of the balance ring 10 larger than the density of the Oldham ring 4, it is possible to increase M2 even with a small balance ring, and (
1) For example,
It is effective to use an aluminum alloy for the Oldham ring 4 and an iron-based material for the balance ring 10. on the other hand. Balance weight 9 also has orbiting scroll 2 and 180
Since the orbiting scroll 2 revolves around the axis O in a phase shifted by degrees, it is possible to balance the unbalanced amount of rotation caused by the revolution of the orbiting scroll 2. Moreover, at this time, the balance weight 9 does not rotate on its own axis but revolves around the point O which is the rotation center of the crankshaft 3, so even if the balance weight is large in shape and has a large mass as shown in FIG. It can be installed without the need for boring into the frame 5. Here, between the crankshaft 3 and the balance weight 9,
It rotates and slides in the same way as between the crankshaft 3 and the orbiting scroll 2, and requires oiling. #As the oil means, as shown in Fig. 1, there is a hole 3e (
A method in which oil is pumped up by a refueling pump that uses centrifugal force to supply oil to the two sliding surfaces, or
Orbiting scroll 2. A method in which the space surrounded by the fixed scroll 1 and the frame 5 is made to have a lower pressure than the oil-containing part outside the pump part, and the space is flooded with oil and refueled using the pressure difference, etc. is preferred. Each embodiment of the second invention will be described below. Embodiment 2 Another embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a cross-sectional view of a scroll compressor pump portion according to another embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along arrows ■-■ in FIG. 4. Components with the same reference numerals as those in the drawings indicate equivalent parts, and their explanations will be omitted. In FIG. 4, 3A is a crankshaft, which has an eccentric bearing part 3d which is an eccentric hole in the upper part, and a second eccentric part which is eccentric in the opposite direction by 80 degrees outside the eccentric bearing part 3d. It has a structure having a portion 3e. Due to the rotation of the crankshaft 3A, the shaft portion of the orbiting scroll 2A inserted into the inside of the eccentric bearing portion 3d and the crank portion 3e
The balance weight 9A fitted on the outside of the crankshaft 3A rotates around the crankshaft 3A with a phase shift of 180'. The balance weight 9A is structured to revolve without rotating due to the action of the balance ring 10A, but the vertical movement of the balance ring IOA is restricted by the lower surface 2f of the orbiting scroll 2A and the upper surface 9f of the balance weight 9A. be done. Moreover, as shown in FIG. 5, the balance ring 1. O
A has parallel parts 1 and 0 g at both ends in the X direction shown in the figure, and by inserting the parallel parts log between the parallel parts 4g provided on the Oldham ring 4A, the frame 5A
Same as the Oldham ring 4A inserted into the groove 5d of
It is possible to move only in the direction. Further, on the lower surface of the balance ring IOA, there is a protrusion 10 shown by a broken line in FIG.
e is provided, and the protrusion 10e is inserted into a groove 9e provided on the upper surface of the balance weight. With the above configuration, when the crankshaft 3A rotates. The balance weight 9A revolves around the crankshaft 3A in a phase 180 degrees out of phase with the orbiting scroll 2A, and the balance ring IOA is connected to the Oldham ring 4A and 18 along the X direction.
9 reciprocates with a phase shift of 0°.In addition, in this embodiment, at the contact portion between the Oldham ring 4A and the balance ring 10A, there is a parallel portion 4g,
g is provided, but in order to restrict the rotation of the balance ring 1OA, a parallel portion may be provided only on one side. Here, the mass and material of the balance ring, the setting of the amount of eccentricity of the crank part of the crankshaft, the means for supplying oil to the balance weight, etc. are the same as in Example 1, and their description will be omitted. In the case of this embodiment, the amount of unbalance caused by the rotation of the orbiting scroll 2A and the balance weight 9A acts at a close distance in the direction of the crankshaft 3A, so the balance weight provided in the motor section can be set small. Since the amount of deflection of the crankshaft 3A during high-speed operation of the compressor is reduced, this is advantageous for high-speed operation. Moreover, the length in the axial direction of contact between the crankshaft 3A and the balance weight 9A can be increased. The revolution movement of the balance weight is stable, which is preferable. Embodiment 3 Another embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is a vertical cross-sectional view of a scroll compressor pump portion according to still another embodiment of the present invention, and FIG.
■It is an arrow sectional view. In FIG. 6, the crankshaft 3A-orbiting scroll 2A
The structure of the Oldham ring 4 is similar to that of the second embodiment. That is, the shaft portion of the orbiting scroll 2A is inserted into the eccentric bearing portion 3d of the crankshaft 3A, and the orbiting scroll 2A is inserted into the eccentric bearing portion 3d of the crankshaft 3A.
A is caused to revolve by a crankshaft 3A and an Oldham ring 4. In this embodiment, the method of supporting the balance ring IOB is the same as in the first embodiment.9 That is, vertical movement is restricted between the lower surface 2f of the orbiting scroll 2A and the plane 5f in the frame 5A. . Further, as shown in FIG. 7, a groove 5d is installed in the X direction within the frame 5A, and a protrusion 10d is provided on the lower surface of the OB. (The broken line part in the figure) is inserted to allow movement only in the X direction. On the other hand, in this embodiment, the balance ring 1OB is
As a means for reciprocating in the direction, a method is used in which the crankshaft 3A is used directly. Specifically, as shown in Figure 6,
Eccentric bearing part 3d and 1.8 at the upper end of crankshaft 3A only
0' Crank part eccentric in the opposite direction (second eccentric part) 3f
Set up. Further, as shown in FIG. 7, the crank portions 3 are attached to both ends in the X direction on the inner diameter of the balance ring 10B.
Parallel portions 10h are provided at intervals that allow insertion of the outer diameter of f. Therefore, when the crankshaft 3A rotates, the balance ring IOB reciprocates in the X direction along the groove 5d of the frame 5A with the crank portion 3f of the crankshaft 3A in contact with the parallel portion 10h of the balance ring 10B. At this time, the two eccentric parts 3d and 3f of the crankshaft 3A are 1
80″′ Since the eccentric direction is off, balance ring I
The OB and the Oldham ring 4 reciprocate in opposite directions along the groove 5d to balance the amount of unbalance. Note that the contact portion between the crank portion 3f and the balance ring IOB does not necessarily have to be set at the parallel portion 10h, and it is sufficient if the contact point of the balance ring does not move during rotation. In this structure, since the crankshaft 3A and the balance weight IOB do not slide, mechanical loss is reduced and the efficiency of the compressor is improved. Example 4 Another example will be described with reference to FIGS. 8 and 9. FIG. 8 is a longitudinal sectional view of a scroll compressor pump section according to still another embodiment of the present invention, and FIG.
It is a sectional view taken in the direction of the IV arrow. In this embodiment, similarly to the first embodiment, a turning radius is given to the orbiting scroll 2 by a pin portion (first eccentric portion) 3a installed on the crankshaft 3. Further, the support means for the balance ring loc regulates the vertical movement between the lower surface 2f of the orbiting scroll 2 and the plane 5f in the frame 5, as shown in FIG. , the balance ring 1. between the parallel parts 4g provided on the inner diameter of the Oldham ring 4A. parallel part of Oc],
Depending on the configuration in which Og is inserted, it is possible to move only in the X direction in the figure. Furthermore, two sliding bottles 101 are fixed to the balance ring by press fitting or the like below both ends of the balance ring 10c in the X direction. Since the side surface of the lower end of this sliding bin 101 is installed so as to be in constant contact with the crank part (second eccentric part) 3b provided on the crankshaft 3, the eccentricity of the crank part 3b of the crank-3 is X with vibration equal to the amount
It reciprocates in the opposite phase to the Oldham ring 4A in the direction. Therefore, the unbalance component caused by the reciprocating motion of the Oldham ring 4A in the structure of this embodiment can be completely eliminated. Further, reference numeral 9 in the figure is a balance weight for removing the unbalance amount of the orbiting scroll 2, which is fixed to the crankshaft 3 with a bolt or the like (not shown) and rotates. Next, FIG. 0 is a diagram showing the relationship between compressor rotation speed and vibration acceleration. That is, FIG. 10 compares the conventional compressor and the compressor of the present invention, in which R-22 is used as the refrigerant gas, the suction pressure is 4 kg/ff1G, and the discharge pressure is 19 kg/ff.
The vibration acceleration of a closed scroll compressor chamber when operated at 1G is shown. Conventional compressors have been operated using Oldham rings made of iron and aluminum alloy, but using an Oldham ring made of aluminum alloy, which has a smaller mass, increases vibration acceleration during high-speed rotation. On the other hand, the compressor according to the present invention has no unbalanced component and the only excitation force is the compression torque fluctuation of the refrigerant gas.
Vibration acceleration tends to decrease as the rotation speed increases,
At 8000 rpm, the vibration acceleration was about 1712 when using the conventional iron Oldham ring, and about 115 when using the aluminum alloy Oldham ring. As explained in detail above, according to this embodiment, it is possible to eliminate unbalanced vibrations caused by the Oldham ring reciprocating within the scroll compressor, thereby making it possible to provide a compressor with low vibration even during high-speed rotation. In the above embodiment, a vertical scroll compressor with a motor section at the bottom and a pump section at the top was described, but the present invention is not limited to this, and the present invention is not limited to this. A similar effect can be expected with a structure in which a section is provided. Next, the effects when the scroll compressor according to the present invention is used in a room air conditioner for heating and cooling will be explained with reference to FIG. FIG. 11 is a partial perspective view of the internal main parts of the room air conditioner outdoor unit. In FIG. 11, 11 is a scroll compressor;
2 is the heat exchanger of the outdoor unit. Further, 13 is a four-way valve for switching between cooling and heating operations, and is connected to the scroll compressor 1 through a suction pipe 14 and a discharge pipe 15. Normally, these pipes connected to the scroll compressor 11 have a complicated structure in order to absorb vibrations and prevent noise from being transmitted to surrounding equipment during the operation of the compressor. It has become. In Figure 1, the suction pipe 4 and the discharge pipe 15 shown by solid lines are examples of conventional piping, but the scroll compressor of the present invention has low vibration at all rotation speeds used. , suction and discharge surface pipes 14. , 15 can be connected as shown by broken lines, and the piping shown in diagonal lines can be omitted. Furthermore, since the scroll compressor has low vibration, other vibration-proofing materials around the compressor can also be omitted9, which has the effect of lowering manufacturing costs. The above effects are not limited to room air conditioners, but also refrigerators,
It goes without saying that other products that use compressors, such as dehumidifiers, have similar effects. [Effects of the Invention] As explained in detail above, the present invention eliminates the unbalanced vibration button based on the Oldham ring that reciprocates within the scroll compressor, and provides a scroll compressor with low vibration even during high-speed rotation. be able to. In addition, there is no need for boring, which reduces processing costs for the frame, and when the compressor is used in air translators, refrigerators, etc., piping and anti-vibration materials can be omitted, reducing the cost of the product. A scroll compressor can be provided.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a scroll compressor pump portion according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along arrow I-1 in FIG. 1, and FIG. 3 is a cross-sectional view used in FIG. FIG. 4 is a vertical sectional view of a scroll compressor pump portion according to another embodiment of the present invention, and FIG. 5 is a perspective view showing each part exploded.
6 is a vertical sectional view of a scroll compressor pump portion according to yet another embodiment of the present invention, and FIG. 7 is a sectional view taken along the 8 is a longitudinal sectional view of a scroll compressor pump portion according to still another embodiment of the present invention, FIG. 9 is a sectional view taken along the IV-4V arrow in FIG. 8,
Fig. 10 is a diagram showing the relationship between compressor rotation speed and vibration acceleration, Fig. 11 is a partial perspective view of the main part inside the room air conditioner outdoor unit, and Fig. 12 is the main part of a conventional scroll compressor. FIG. DESCRIPTION OF SYMBOLS 1... Fixed scroll, 2, 2A... Orbiting scroll, 3, 3A... Crankshaft, 3a... Bin part, 3
b. 3e, 3f... crank part, 3d... eccentric bearing part,
4゜4A...Oldham ring, 5...Frame,'
9,9A...Balance weight, 10. IOA, I.O.
B, 1oC...Balance ring.

Claims (1)

[Claims] 1. A fixed scroll and an orbiting scroll whose scroll wraps are engaged with each other to form a compression chamber, a crankshaft which has an eccentric part to which the orbiting scroll is mounted and which transmits the rotational force of an electric motor to revolve the orbiting scroll, and this crankshaft. A scroll compressor comprising: a frame that supports a fixed scroll and is coupled to a fixed scroll; and an Oldham ring that is interposed between the orbiting scroll and the frame and prevents rotation of the orbiting scroll, A scroll compressor characterized by being provided with members that reciprocate in different phases. 2. A second eccentric part is provided in a direction 180° out of phase with the eccentric part in proximity to the eccentric part of the crankshaft that drives the orbiting scroll. A balance weight that rotates around the crankshaft is installed, and a member for preventing rotation is provided on this balance weight, so that the balance weight does not rotate around the crankshaft in a phase that is 180 degrees out of phase with the orbiting scroll. The scroll compressor according to claim 1, characterized in that it revolves. 3. The member that prevents the rotation of the balance weight is a ring-shaped balance ring, and when this balance ring is located in the same plane as the Oldham ring, and when the centers of gravity of both move back and forth on the same straight line in opposite phases, 3. The scroll compressor according to claim 1, wherein both unbalances due to reciprocating motion are set to have the same magnitude. 4. A second eccentric part is provided in a direction 180° out of phase with the eccentric part in the vicinity of the eccentric part of the crankshaft that drives the orbiting scroll, and the second eccentric part is provided in the same plane as the Oldham ring with respect to the frame. A substantially ring-shaped balance ring capable of reciprocating only in the same direction as the crankshaft is provided, and a second eccentric portion of the crankshaft is connected to either a part of the balance ring or a part of a member fixed to the balance ring. The balance ring is always in contact with the Oldham ring, and the balance ring is set to reciprocate in an opposite phase on the same straight line as the Oldham ring, and the amount of unbalance based on the reciprocating motion of both is set to be the same. Scroll compressor according to claim 1. 5. Claims 1 to 4 characterized in that the balance ring is indirectly guided by an Oldham ring that moves along a groove provided in the frame as a means for regulating the movement direction of the balance ring in one direction within the frame. Any of the scroll compressors listed. 6. 6. The scroll compressor according to claim 1, wherein the balance ring is made of a material having a higher density than that of the Oldham ring. 7. An air conditioner using the scroll compressor according to any one of claims 1 to 6. 8. A refrigerator using the scroll compressor according to any one of claims 1 to 6.