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CN-121993400-A - Scroll compressor and air conditioner

CN121993400ACN 121993400 ACN121993400 ACN 121993400ACN-121993400-A

Abstract

The invention provides a scroll compressor and an air conditioner, wherein the scroll compressor comprises: the eccentric crank pin is arranged at the end part of the driving shaft, and is provided with a first driving surface. The bush is equipped with the mounting hole, and eccentric crank pin peg graft to the mounting hole in, be equipped with first driven surface in the mounting hole, under the condition that the drive shaft was contra-rotating, first driving surface was used for promoting first driven surface. In the radial direction of the driving shaft, the distance between the axis of the driving shaft and the first driving surface is L1, the distance between the axis of the bushing and the first driven surface is H1, L1 and H1 are satisfied, and L1> H1. The distance between the axis of the driving shaft and the first driving surface is larger than the distance between the axis of the bushing and the first driven surface, the force component of the force applied to the movable vortex disk in the radial direction is larger, the contact force between the movable vortex disk and the fixed vortex disk can be improved, the time required from the reverse rotation to the stop of the compressor to the restarting of the compressor is shorter, the abrasion problem of parts is reduced, and the reliability of the compressor is improved.

Inventors

  • LI XIAO
  • GENG LIWEI
  • JI GAOFENG
  • LV GANG

Assignees

  • 广东美的环境科技有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (10)

  1. 1. A scroll compressor, comprising: A drive shaft; the eccentric crank pin is arranged at the end part of the driving shaft, is eccentrically arranged relative to the driving shaft and is provided with a first driving surface; The bushing is provided with a mounting hole, the eccentric crank pin is inserted into the mounting hole, a first driven surface is arranged in the mounting hole, and the first driving surface is used for pushing the first driven surface under the condition that the driving shaft is reversed; The distance between the axis of the driving shaft and the first driving surface is L1, the distance between the axis of the bushing and the first driven surface is H1, and L1 and H1 are satisfied, wherein L1> H1.
  2. 2. The scroll compressor of claim 1, wherein the eccentric crank pin is further provided with a second driving surface, and wherein the mounting hole is further provided with a second driven surface therein, the second driving surface being configured to push the second driven surface in a case where the driving shaft is rotated forward; The distance between the axis of the driving shaft and the second driving surface is L2, the distance between the axis of the bushing and the second driven surface is H2, and the distances between the axis of the bushing and the second driven surface are H2, L2 and H2 are satisfied, and L2> H2.
  3. 3. The scroll compressor of claim 2, wherein an included angle exists between the first drive surface and the second drive surface.
  4. 4. The scroll compressor of claim 2, wherein the second drive surface and the second driven surface are in engagement with each other when the drive shaft is rotated in a forward direction; When the drive shaft is rotated in reverse, the first drive surface and the first driven surface are in contact with each other.
  5. 5. The scroll compressor of claim 2, wherein the second drive surface and the second driven surface are separated in the event of forward rotation of the drive shaft; In the case of reverse rotation of the drive shaft, the first drive surface and the first driven surface are separated.
  6. 6. The scroll compressor of any one of claims 2 to 5, wherein a first arcuate surface is disposed between the first side of the first drive surface and the second drive surface; a second arc-shaped surface is arranged between the second side of the first driving surface and the second driving surface, and the first arc-shaped surface and the second arc-shaped surface are concentrically arranged.
  7. 7. The scroll compressor of claim 6, wherein the first arcuate surface and the second arcuate surface are each spaced from an inner wall of the mounting hole.
  8. 8. The scroll compressor according to any one of claims 1 to 5, wherein the first driving angle is set to α1, and the eccentric amount of the scroll compressor is D, α1=arcsin [ (L1-H1)/D ].
  9. 9. A scroll compressor as claimed in any one of claims 2 to 5, wherein the second drive angle is set to α2, and the amount of eccentricity of the scroll compressor is D, α2 = arcsin [ (L2-H2)/D ].
  10. 10. An air conditioner, comprising: The scroll compressor according to any one of claims 1 to 9.

Description

Scroll compressor and air conditioner Technical Field The invention belongs to the technical field of compressors, and particularly relates to a scroll compressor and an air conditioner. Background The single-phase scroll compressor resumes the power supply in the very short time after the power is disconnected, can make the compressor reverse, and the compressor does not have refrigerant circulation to lead to the air conditioner not to refrigerate during the reverse, and long-time reverse can exert an influence on the compressor reliability. Disclosure of Invention The present invention aims to solve one of the technical problems existing in the prior art or related technologies. In view of the above, the present invention provides a scroll compressor, comprising a driving shaft, an eccentric crank pin provided at an end of the driving shaft, the eccentric crank pin being eccentrically provided with a first driving surface with respect to the driving shaft, a bushing provided with a mounting hole into which the eccentric crank pin is inserted, the mounting hole being provided with a first driven surface for pushing the first driven surface in case of reverse rotation of the driving shaft, wherein a distance between an axis of the driving shaft and the first driving surface in a radial direction of the driving shaft is L1, and a distance between an axis of the bushing and the first driven surface is H1, L1 and H1 are satisfied, and L1> H1. The eccentric crank pin is arranged on the driving shaft, the driving shaft can drive the eccentric crank pin to rotate, and the eccentric crank pin is inserted into the mounting hole of the bushing, so that the eccentric crank pin can drive the bushing to rotate, the bushing is used for being assembled with the movable scroll in the scroll compressor, the bushing can drive the movable scroll to move, and the movable scroll and the fixed scroll in the scroll compressor are used for compressing refrigerant. For single-phase scroll compressors, in some abnormal situations, such as a sudden power interruption and a restoration of power in an extremely short period of time, the motor of the compressor may be reversed. At this time, the motor drives the driving shaft and the eccentric crank pin to reversely rotate, and the first driving surface of the eccentric crank pin is matched with the first driven surface of the unloading bushing. In the above-mentioned situation, the reverse rotation of the motor-driven compressor is an abnormal situation, and the compressor does not compress the refrigerant at this time, which may cause the air conditioning system to fail to cool. When this occurs, the refrigerant in the compressor circulates very little, and insufficient refrigerant cools the motor, and the motor is usually required to be heated to the opening temperature of the protector, so that the protector is protected, and the motor stops working to stop reversing. Then, the motor naturally cools down, the temperature is reduced to the closing temperature of the protector, and the compressor can be restarted normally. When the compressor reversely rotates, the movable scroll and the fixed scroll are changed from compressed gas into expansion gas, which is equivalent to vacuumizing the inside of the scroll. When the compressor is in abnormal reverse rotation, it takes about 1 hour from the reverse rotation to the stop and to the restart. Failure of the air conditioning system to cool for a long period of time can cause customer complaints. The compressor may also wear parts over time. In the running process of the movable vortex disk relative to the fixed vortex disk, the larger the reaction force of the movable vortex disk to the movable vortex disk is, the better the sealing effect between the movable vortex disk and the fixed vortex disk is. Specifically, the greater the interaction force of the movable scroll and the fixed scroll in the radial direction, the better the sealing effect between the movable scroll and the fixed scroll, and the greater the component force of the force applied to the movable scroll in the radial direction when the distance between the axis of the driving shaft and the first driving surface is greater than the distance between the axis of the bushing and the first driven surface, so that the contact force between the movable scroll and the fixed scroll can be improved. The greater the force applied by the movable vortex disc to the given vortex disc, the greater the work consumed by the movable vortex disc, the greater the current of the motor, the increased heat productivity of the motor, the increased temperature rising speed, the shorter the time for the motor to rise to the opening temperature of the protector, the shorter the time required for the compressor to stop from reversing to restarting, the problem that the air conditioning system cannot refrigerate for a long time is avoided, the abrasion problem of parts is reduced, and the reliabil