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CN-121993406-A - Pump body structure, fluid machinery and heat exchange equipment

CN121993406ACN 121993406 ACN121993406 ACN 121993406ACN-121993406-A

Abstract

The invention provides a pump body structure, a fluid machine and heat exchange equipment, wherein the pump body structure comprises a first cylinder, a second cylinder and a crankshaft, a first sliding vane groove is formed in the first cylinder, the volume of the first cylinder is smaller than that of the second cylinder, a second sliding vane groove is formed in the second cylinder, the crankshaft is provided with a first eccentric part arranged in the first cylinder and a second eccentric part arranged in the second cylinder, a first phase is formed when the first eccentric part is aligned with the first sliding vane groove in the process of rotation of the crankshaft, a second phase is formed when the second eccentric part is aligned with the second sliding vane groove, a phase angle theta is formed between the first phase and the second phase, and the phase angle theta is more than or equal to-90 degrees and less than or equal to 80 degrees. The pump body structure, the fluid machinery and the heat exchange equipment can solve the problem that in the prior art, the reliability of the pump body is poor due to the fact that unbalanced force is increased due to the superposition of resistance moment.

Inventors

  • FU ZHENG
  • REN LIPING
  • YAN WEIHAO
  • SU YONGQIANG

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (15)

  1. 1. A pump body structure, comprising: a first cylinder (20), wherein a first sliding vane groove (230) is formed on the first cylinder (20); A second cylinder (30), wherein the volume of the first cylinder (20) is smaller than that of the second cylinder (30), and a second sliding vane groove (330) is formed in the second cylinder (30); A crankshaft (70), the crankshaft (70) has a first eccentric portion (710) disposed inside the first cylinder (20), and a second eccentric portion (720) disposed inside the second cylinder (30), the first eccentric portion (710) forms a first phase when aligned with the first vane groove (230) and a second phase when aligned with the second vane groove (330), a phase angle θ is formed between the first phase and the second phase, and the phase angle θ satisfies-90 θ+≤80°.
  2. 2. Pump body structure according to claim 1, characterized in that the phase angle θ satisfies-30+.θ+.30 °.
  3. 3. Pump body structure according to claim 1, characterized in that, when the first eccentric portion (710) and the second eccentric portion (720) are co-eccentric, the included angle beta between the first sliding vane groove (230) and the second sliding vane groove (330) is more than or equal to 90 degrees and less than or equal to 260 degrees.
  4. 4. Pump body structure according to claim 1, characterized in that, when the first eccentric portion (710) and the second eccentric portion (720) are eccentric in opposite directions, the included angle β of the first slide groove (230) and the second slide groove (330) satisfies-90 ° - β -80 °.
  5. 5. Pump body structure according to claim 1, characterized in that, when the angle between the first slide groove (230) and the second slide groove (330) is 0 °, the angle α between the first eccentric portion (710) and the second eccentric portion (720) satisfies-80 ° - α -90 °.
  6. 6. Pump body structure according to claim 1, characterized in that the angle α of the first eccentric portion (710) and the second eccentric portion (720) satisfies 100 ° and α and 270 ° when the angle of the first slide groove (230) and the second slide groove (330) is 180 °.
  7. 7. Pump body structure according to claim 1, characterized in that the first slide groove (230) has a width T1 and the second slide groove (330) has a width T2, T1 and T2 satisfying T2/T1<1.7.
  8. 8. Pump body structure according to claim 1, characterized in that the volume V2 of the first cylinder (20) is less than or equal to 80% of the volume V1 of the second cylinder (30).
  9. 9. The pump body structure according to claim 1, wherein the crankshaft (70) has a body portion (730), the first eccentric portion (710) and the second eccentric portion (720) are disposed on the body portion (730), The outer periphery of the first eccentric part (710) does not exceed the outer periphery of the body part (730), and/or The first eccentric portion (710) is located at an axial end of the crankshaft (70).
  10. 10. Pump body structure according to any one of claims 1 to 9, characterized in that the first cylinder (20) has a first compression chamber and a first suction opening (220) communicating with the first compression chamber, the second cylinder (30) has a second compression chamber and a second suction opening (320) communicating with the second compression chamber, the suction of the first suction opening (220) being greater than the suction pressure of the second suction opening (320).
  11. 11. Pump body structure according to claim 10, characterized in that said first cylinder (20) comprises: a first cylinder body having a first suction port (220) thereon; A first roller (210), wherein the first roller (210) is movably arranged in the first cylinder body, and the first eccentric part (710) is arranged in the first roller (210) to drive the first roller (210) to move; The first sliding vane, the part of first sliding vane sets up the inside in first gleitbretter groove (230), the one end in first gleitbretter groove (230) with first roller (210) butt, first roller (210) with form first compression chamber between the first cylinder body, first induction port (220) with first compression chamber intercommunication.
  12. 12. Pump body structure according to claim 10, characterized in that said second cylinder (30) comprises: a second cylinder body having a second suction port (320) thereon; The second roller (310) is movably arranged in the second cylinder body, and the second eccentric part (720) is arranged in the second roller (310) to drive the second roller (310) to move; The second sliding vane, the part setting of second sliding vane is in the inside of second gleitbretter groove (330), the one end in second gleitbretter groove (330) with second roller (310) butt, second roller (310) with form the second compression chamber between the second jar body, second induction port (320) one end with second compression chamber intercommunication, the other end and knockout intercommunication.
  13. 13. Pump body structure according to any one of claims 1 to 9, characterized in that it further comprises: A first bearing (50); A second bearing (60), a first cavity is formed between the first bearing (50) and the second bearing (60), and the second cylinder (30) is arranged inside the first cavity; The cover plate (40), the cover plate (40) is in one side that the second bearing (60) kept away from first bearing (50), form the second cavity between cover plate (40) and the second bearing (60), first cavity with the parallel setting of second cavity, first cylinder (20) set up the inside of second cavity.
  14. 14. A fluid machine, characterized in that it comprises a pump body structure according to any one of claims 1 to 13.
  15. 15. A heat exchange device comprising the fluid machine of claim 14.

Description

Pump body structure, fluid machinery and heat exchange equipment Technical Field The invention relates to the technical field related to mechanical equipment, in particular to a pump body structure, fluid machinery and heat exchange equipment. Background When a common household air conditioner is used in northern cold areas, the air conditioner product has the common problems of poor low-temperature heating effect, slow high-temperature refrigeration and low energy efficiency. The appearance of the two-stage enthalpy-increasing technology solves part of the problems of low-temperature heating, but the effect of the two-stage enthalpy-increasing technology is poor and the limitation of the two-stage enthalpy-increasing technology is also revealed when the low-load refrigeration is required. Therefore, the independent compression enthalpy-increasing technology of the large cylinder and the small cylinder can meet the low-temperature heating requirement, and the effect on the low-load working condition is not reduced. The prior art discloses a multi-cylinder compressor with independent compression of large and small cylinders, but the longitudinal structure of a pump body of the multi-cylinder compressor is consistent with that of a common double-cylinder compressor, two cylinders are arranged between two bearings, a large cylinder sucks low-pressure refrigerant to work, and a small cylinder sucks medium-pressure refrigerant to work. The pump body with the structure needs to consider the assembly relation, the small deflection of the crankshaft cannot be miniaturized, the size of parts of the small cylinder is larger, the efficiency of the pump body is reduced, and the influence of forces generated by inconsistent working states of the large cylinder and the small cylinder on the supporting part is not considered. From the above, the multi-cylinder compressor in the prior art has the problems that unbalanced force is increased due to the superposition of the resisting moment, and the reliability of the pump body is deteriorated. Disclosure of Invention The invention mainly aims to provide a pump body structure, fluid machinery and heat exchange equipment, which are used for solving the problem that in the prior art, the reliability of a pump body is poor due to the fact that unbalanced force is increased by superposition of resistance moment of a multi-cylinder compressor. In order to achieve the above object, according to one aspect of the present invention, there is provided a pump body structure including a first cylinder having a first slide groove, a second cylinder having a smaller volume than the second cylinder, and a crankshaft having a first eccentric portion provided inside the first cylinder and a second eccentric portion provided inside the second cylinder, wherein during rotation of the crankshaft, the first eccentric portion forms a first phase with the first slide groove when aligned, the second eccentric portion forms a second phase with the second slide groove when aligned, a phase angle θ is formed between the first phase and the second phase, and the phase angle θ satisfies-90 θ+.80 °. Further, the phase angle θ satisfies-30+.θ+.30 ℃. Further, when the first eccentric part and the second eccentric part are eccentric in the same direction, the included angle beta of the first sliding vane groove and the second sliding vane groove is more than or equal to 90 degrees and less than or equal to 260 degrees. Further, when the eccentric directions of the first eccentric part and the second eccentric part are opposite, the included angle beta of the first sliding vane groove and the second sliding vane groove meets the range of-90 degrees and beta is less than or equal to 80 degrees. Further, when the included angle between the first sliding vane groove and the second sliding vane groove is 0 DEG, the included angle alpha between the first eccentric part and the second eccentric part is more than or equal to-80 DEG and less than or equal to 90 deg. Further, when the included angle between the first sliding vane groove and the second sliding vane groove is 180 degrees, the included angle alpha between the first eccentric part and the second eccentric part is more than or equal to 100 degrees and less than or equal to 270 degrees. Further, the width of the first sliding vane groove is T1, the width of the second sliding vane groove is T2, and T1 and T2 meet the requirement of T2/T1<1.7. Further, the volume V 2 of the first cylinder is 80% or less of the volume V 1 of the second cylinder. Further, the crankshaft has a body portion on which the first eccentric portion and the second eccentric portion are provided, an outer peripheral edge of the first eccentric portion not exceeding an outer peripheral edge of the body portion, and/or an end portion of the first eccentric portion in an axial direction of the crankshaft. Further, the first cylinder has a first compression chamber and a first suction por