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CN-121993407-A - Pump body structure, fluid machinery and heat exchange equipment

CN121993407ACN 121993407 ACN121993407 ACN 121993407ACN-121993407-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, at least one second cylinder is arranged on the second cylinder, the volume of the first cylinder is smaller than or equal to 80% of that of the second cylinder, the crankshaft is provided with a first eccentric part and a second eccentric part, the first eccentric part is arranged in the first cylinder, the second eccentric part is arranged in the second cylinder, and the diameter D1 of the first eccentric part and the diameter D2 of the second eccentric part are smaller than or equal to 0.3 and smaller than or equal to 0.8. The pump body structure provided by the invention adopts the first eccentric part arranged in the first cylinder and the second eccentric part arranged in the second cylinder, so that leakage is reduced in the running process of the pump body structure, the friction power consumption of moving parts is reduced, the compression efficiency of the pump body structure is improved, and the problem of low efficiency of the compressor with independent compression of the big cylinder and the small cylinder in the prior art is solved.

Inventors

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

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (14)

  1. 1. A pump body structure, comprising: A first cylinder (20) having a first suction port (220) and a first compression chamber which are provided in communication; At least one second cylinder (30), wherein the volume of the first cylinder (20) is less than or equal to 80% of the volume of the second cylinder (30), the second cylinder (30) is provided with a second air suction port (320) and a second compression cavity which are communicated, and the suction pressure of the first compression cavity is greater than the suction pressure of the second compression cavity; The crankshaft (70) is provided with a first eccentric part (710) and a second eccentric part (720), the first eccentric part (710) is arranged in the first cylinder (20), the second eccentric part (720) is arranged in the second cylinder (30), the outer periphery of the first eccentric part (710) does not exceed the outer periphery of a shaft neck (730) of the crankshaft (70), and the diameter D1 of the first eccentric part (710) and the diameter D2 of the second eccentric part (720) are smaller than or equal to 0.3 and smaller than or equal to D1/D2 and smaller than or equal to 0.8.
  2. 2. The pump body structure of claim 1, wherein, The second cylinder (30) and the first cylinder (20) are both provided with one, and the diameter D1 of the first eccentric part (710) and the diameter D2 of the second eccentric part (720) meet that D1/D2 is more than or equal to 0.3 and less than or equal to 0.5; The second cylinders (30) are provided with at least two, the first cylinder (20) is provided with one, and the diameter D1 of the first eccentric part (710) and the diameter D2 of the second eccentric part (720) meet the requirement that D1/D2 is smaller than or equal to 0.4 and smaller than or equal to 0.8.
  3. 3. Pump body structure according to claim 1, characterized in that the height of the first cylinder (20) is H1, the height of the second cylinder (30) is H2, the radius of the first cylinder (20) is R1, the radius of the second cylinder (30) is R2,0.4 x R1/R2≤h1/H2≤1.2 x R1/R2.
  4. 4. A pump body structure according to claim 3, wherein H1/h2=0.9×r1/R2.
  5. 5. Pump body structure according to claim 1, characterized in that the first eccentric portion (710) has an eccentric value e1, the second eccentric portion (720) has an eccentric value e2, the first cylinder (20) has a radius R1, the second cylinder (30) has a radius R2,0.3 x R1/R2≤e1/e 2≤0.9 x R1/R2.
  6. 6. Pump structure according to claim 5, characterized in that e1/e2 = 0.6R 1/R2.
  7. 7. Pump body structure according to claim 1, characterized in that the first eccentric portion (710) has an eccentricity e1, the second eccentric portion (720) has an eccentricity e2,0.3 x D1/D2≤e1/e 2≤1.1 x D1/D2.
  8. 8. Pump structure according to claim 6, characterized in that e1/e2 = 0.65D 1/D2.
  9. 9. The pump body structure of claim 1, wherein, The first eccentric part (710) and the second eccentric part (720) have the same eccentric direction, or The first eccentric part (710) is opposite to the second eccentric part (720), the axial projection of the first eccentric part (710) is positioned inside the axial projection of the second eccentric part (720), or The first eccentric part (710) and the second eccentric part (720) are arranged at an included angle in the eccentric direction.
  10. 10. Pump body structure according to any one of claims 1 to 9, characterized in that the first eccentric portion (710) is located at an axial end of the crankshaft (70).
  11. 11. Pump body structure according to any one of claims 1 to 9, characterized in that the first cylinder (20) and the second cylinder (30) are arranged in sequence along the axial direction of the crankshaft (70), the first cylinder (20) being arranged at the bottom side of the second cylinder (30).
  12. 12. 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 at least one second cylinder (30) is arranged in 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.
  13. 13. A fluid machine, characterized in that it comprises a pump body structure according to any one of claims 1 to 12.
  14. 14. A heat exchange device comprising the fluid machine of claim 13.

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 The air conditioner has the temperature adjusting effect as a heat exchange device, and at present, when the 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. In order to overcome the above problems, a dual-stage enthalpy-increasing technology has begun to appear, and although the dual-stage enthalpy-increasing technology solves part of the problems of low-temperature heating, the effect of the dual-stage enthalpy-increasing technology is poor and the limitation thereof is also revealed when the low-load refrigeration is required. Based on the above, the independent compression enthalpy-increasing technology of the large cylinder and the small cylinder appears in the market, so that the low-temperature heating requirement can be met, and the effect on the low-load working condition is not reduced. However, in the compressor with independent compression of the big cylinder and the small cylinder in the prior art, the longitudinal structure of the pump body is consistent with that of a common double-cylinder compressor, two cylinders are arranged between two bearings, a big 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, and the small deflection of the crankshaft cannot be miniaturized, so that the small cylinder part has larger size, and the efficiency of the compressor is reduced. From the above, the compressor of independent compression of the big and small cylinders in the prior art has the problem of low efficiency. Disclosure of Invention The invention mainly aims to provide a pump body structure, a fluid machine and heat exchange equipment, so as to solve the problem of low efficiency of a compressor with independent compression of a large cylinder and a small cylinder in the prior art. 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 suction port and a first compression chamber which are provided in communication, a second cylinder having a second suction port and a second compression chamber which are provided in communication, a volume of the first cylinder being 80% or less of a volume of the second cylinder, a suction pressure of the first compression chamber being greater than a suction pressure of the second compression chamber, and a crankshaft having a first eccentric portion and a second eccentric portion, the first eccentric portion being provided inside the first cylinder, the second eccentric portion being provided inside the second cylinder, an outer peripheral edge of the first eccentric portion not exceeding an outer peripheral edge of a journal of the crankshaft, a diameter D1 of the first eccentric portion and a diameter D2 of the second eccentric portion satisfying 0.3D 1/D2. Further, the second cylinder and the first cylinder are both provided with one, the diameter D1 of the first eccentric portion and the diameter D2 of the second eccentric portion satisfy 0.3≤D1/D2≤0.5, the second cylinder is provided with at least two, the first cylinder is provided with one, and the diameter D1 of the first eccentric portion and the diameter D2 of the second eccentric portion satisfy 0.4≤D1/D2≤0.5. Further, the height of the first cylinder is H1, the height of the second cylinder is H2, the radius of the first cylinder is R1, the radius of the second cylinder is R2, R1/R2 is more than or equal to 0.4 and less than or equal to H1/H2 and less than or equal to 1.2 and R1/R2. Further, H1/h2=0.9×r1/R2. Further, the eccentric amount of the first eccentric part is e1, the eccentric amount of the second eccentric part is e2, the radius of the first cylinder is R1, the radius of the second cylinder is R2, and R1/R2 is more than or equal to 0.3 and less than or equal to 0.9 and R1/R2. Further, e1/e2=0.6r1/R2. Further, the first eccentric portion has an eccentric amount e1, the second eccentric portion has an eccentric amount e2, and 0.3×d1/d2 is less than or equal to e1/e2 is less than or equal to 1.1×d1/D2. Further, e1/e2=0.65×d1/D2. Further, the eccentric directions of the first eccentric part and the second eccentric part are the same, or the eccentric directions of the first eccentric part and the second eccentric part are opposite, the projection of the axial direction of the first eccentric part is positioned inside the projection of the axial direction of the second eccentric part, or the eccentric directions of the first ecc