Search

CN-121993402-A - Pump body assembly, fluid machinery and heat exchange equipment

CN121993402ACN 121993402 ACN121993402 ACN 121993402ACN-121993402-A

Abstract

The invention provides a pump body assembly, a fluid machine and heat exchange equipment. The pump body assembly comprises a first cylinder, a second cylinder, a third cylinder, a crankshaft, a first flange, a second flange, a third cylinder, a second cover plate and an exhaust silencing cavity, wherein the volume of the third cylinder is smaller than that of the first cylinder and the second cylinder, the crankshaft comprises a main body part, a first diameter expanding section, a second diameter expanding section and a diameter reducing section, the outer periphery of the diameter reducing section does not exceed the outer periphery of the main body part, the first diameter expanding section, the second diameter expanding section and the diameter reducing section are eccentrically arranged in the axial direction of the main body part and are respectively positioned in the first cylinder, the second cylinder and the third cylinder, the first flange and the second flange are positioned between the first flange and the second flange, the third cylinder is positioned between the second flange and the third cylinder, and the second cover plate and the second flange form the exhaust silencing cavity of the second cylinder and the third cylinder. The invention solves the problem that the miniaturization design of the air cylinder in the fluid machinery in the prior art is limited.

Inventors

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

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (13)

  1. 1. A pump body assembly, comprising: A first cylinder (10) and a second cylinder (20), wherein a partition plate (120) is arranged between the first cylinder (10) and the second cylinder (20); a third cylinder (30), the volume of the third cylinder (30) being smaller than the volume of the first cylinder (10) and the volume of the second cylinder (20), respectively; a crankshaft (40), wherein the crankshaft (40) comprises a main body part (41), a first diameter-expanding section (42), a second diameter-expanding section (43) and a diameter-reducing section (44), the outer periphery of the first diameter-expanding section (42) and the outer periphery of the second diameter-expanding section (43) exceed the outer periphery of the main body part (41), the outer periphery of the diameter-reducing section (44) does not exceed the outer periphery of the main body part (41), and the first diameter-expanding section (42), the second diameter-expanding section (43) and the diameter-reducing section (44) are eccentrically arranged in the axial direction of the main body part (41); Wherein the first diameter-enlarging section (42) and the second diameter-enlarging section (43) are respectively positioned in the first cylinder (10) and the second cylinder (20), and the diameter-reducing section (44) is positioned in the third cylinder (30) so as to respectively participate in the compression process in the rotation process of the crankshaft (40); -a first flange (80) and a second flange (90), the first cylinder (10) and the second cylinder (20) being located between the first flange (80) and the second flange (90); -a first cover plate (100), the third cylinder (30) being located between the second flange (90) and the first cover plate (100); -a second cover plate (110), the second cover plate (110) being located between the second flange (90) and the third cylinder (30); When the exhaust structure of the third cylinder (30) is located on the second cover plate (110), an exhaust silencing cavity (140) of the second cylinder (20) and the third cylinder (30) is formed between the second cover plate (110) and the second flange (90).
  2. 2. The pump body assembly of claim 1, further comprising a first and a second exhaust valve plate, the first exhaust valve plate being used for exhaust of the first and second cylinders (10, 20) and the second exhaust valve plate being used for exhaust of the third cylinder (30), wherein a thickness t1 of the first exhaust valve plate and a thickness t2 of the second exhaust valve plate satisfy 0.1≤t2/t1≤1.
  3. 3. The pump body assembly of claim 1, further comprising a first and a second exhaust valve plate, the first exhaust valve plate being used for exhaust of the first and second cylinders (10, 20) and the second exhaust valve plate being used for exhaust of the third cylinder (30), wherein a width b1 of the first and second exhaust valve plates satisfies 0.1≤b2/b1≤1.
  4. 4. The pump body assembly of claim 1, further comprising a first and a second exhaust valve plate, the first exhaust valve plate being used for exhaust of the first and second cylinders (10, 20) and the second exhaust valve plate being used for exhaust of the third cylinder (30), wherein a width L1 of the first and second exhaust valve plates satisfies 0.1L 2/L1.
  5. 5. Pump body assembly according to claim 1, characterized in that the volume V1 of the second cylinder (20), the exhaust gas minimum cross-sectional area S1 of the second cylinder (20), the volume V2 of the third cylinder (30), the exhaust gas minimum cross-sectional area S2 of the third cylinder (30) satisfy between: 0.1≤S2/S1≤1; V2*S1/(V1*S2)≤1.1。
  6. 6. Pump body assembly according to claim 1, characterized in that the suction pressure of the third cylinder (30) is greater than the suction pressure of the first cylinder (10) and the suction pressure of the second cylinder (20), respectively.
  7. 7. The pump body assembly according to claim 1, further comprising a first roller (50), a second roller (60) and a third roller (70), wherein the first roller (50) and the second roller (60) are respectively accommodated in the first cylinder (10) and the second cylinder (20), the third roller (70) is accommodated in the third cylinder (30), and the first diameter expansion section (42) and the second diameter expansion section (43) respectively drive the first roller (50) and the second roller (60) to move, and the diameter reduction section (44) drives the third roller (70) to move.
  8. 8. Pump body assembly according to claim 1, characterized in that the diameter-reducing section (44) is located at the bottom end of the crankshaft (40), the first flange (80) is located above the second flange (90), the upper end face of the first cylinder (10) is in sealing connection with the first flange (80) (60), the lower end face of the second cylinder (20) is in sealing connection with the second flange (90), the upper end face of the third cylinder (30) is in sealing connection with the second cover plate (110), and the lower end face of the third cylinder (30) is in sealing connection with the first cover plate (100).
  9. 9. The pump body assembly of claim 1, wherein, The first and second expanded diameter sections (42, 43) are eccentrically arranged in opposite directions relative to the main body portion (41), and/or The second diameter-enlarging section (43) and the diameter-reducing section (44) are eccentrically disposed in the same direction with respect to the main body section (41).
  10. 10. The pump body assembly according to claim 1, further comprising a third cover plate (120), the third cover plate (120) being located on a side of the first cover plate (100) remote from the third cylinder (30), an exhaust chamber (150) of the third cylinder (30) being formed between the third cover plate (120) and the first cover plate (100), and an exhaust silencing chamber (140) of the second cylinder (20) being formed between the second cover plate (110) and the second flange (90).
  11. 11. Pump body assembly according to claim 1, characterized in that it has a third suction opening (31) communicating with the internal cavity of the third cylinder (30), wherein, The third air suction port (31) is arranged on the third air cylinder (30), or The third air suction port (31) is arranged on the first cover plate (100), or The third air suction port (31) is arranged on the second cover plate (110).
  12. 12. A fluid machine comprising a pump body assembly according to any one of claims 1 to 11.
  13. 13. A heat exchange device comprising the fluid machine of claim 12.

Description

Pump body assembly, fluid machinery and heat exchange equipment Technical Field The invention relates to the technical field of heat exchange equipment, in particular to a pump body assembly, fluid machinery and heat exchange equipment. Background With the advancement of society and the development of heat exchange technology, coupling of fluid machinery such as a compressor with other functions and technologies has become a development trend in the field of heat exchange equipment, such as two-stage compression, three-stage compression, single-stage air supply, two-stage air supply, and the like. These functions often require multiple cylinder, more complex compressor configurations, with single cylinder compressors, two cylinder compressors, three cylinder compressors, and three cylinder and more multi-cylinder compressors in the prior art. However, the above-described multi-cylinder rotary compressor has the following problems. Each eccentric part and roller are contained in a cylinder chamber formed at the inner diameter part of the cylinder to eccentrically rotate, compared with a single-cylinder and double-cylinder compressor, the distance between the upper flange and the lower flange is increased, the crankshaft is easy to vibrate, the reliability of the multi-cylinder compressor is poor, the vibration noise is large, the aligning assembly process of the cylinder positioned in the middle is complex, and the assembly of the compressor is inconvenient. In addition, in order to consider the assembly relation and avoid affecting the efficiency of the large cylinder, the multi-cylinder compressor cannot properly adjust the volume of the small cylinder to achieve miniaturization and high efficiency, so that the power consumption generated by the friction pair in the cylinder is larger, and the energy efficiency of the compressor is affected. As described above, the prior art has a problem that the miniaturization design of the cylinder in the fluid machine is limited. Disclosure of Invention The invention mainly aims to provide a pump body assembly, a fluid machine and heat exchange equipment, so as to solve the problem that the miniaturization design of a cylinder in the fluid machine in the prior art is limited. In order to achieve the above object, according to one aspect of the present invention, there is provided a pump body assembly including a first cylinder and a second cylinder, a partition plate being provided between the first cylinder and the second cylinder, a third cylinder having a smaller volume than the first cylinder and the second cylinder, respectively, a crankshaft including a main body portion, a first expanded diameter section, a second expanded diameter section, and a contracted diameter section, an outer periphery of the first expanded diameter section and an outer periphery of the second expanded diameter section exceeding an outer periphery of the main body portion, an outer periphery of the contracted diameter section not exceeding an outer periphery of the main body portion, the first expanded diameter section, the second expanded diameter section, and the contracted diameter section being eccentrically disposed in an axial direction of the main body portion, wherein the first expanded diameter section and the second expanded diameter section are located inside the first cylinder and inside the second cylinder, respectively, to participate in a compression process during rotation of the crankshaft, a first flange and a second flange, the first cylinder and the second cylinder are located between the first flange and the second flange, a second flange, and a third flange are located between the first cylinder and the second flange, and a second cylinder and a third cover, and a second flange are located between the second cylinder and a third cover. Further, the pump body assembly further comprises a first air discharge valve block and a second air discharge valve block, wherein the first air discharge valve block is used for discharging air of the first air cylinder and the second air cylinder, and the second air discharge valve block is used for discharging air of the third air cylinder, and the thickness t1 of the first air discharge valve block and the thickness t2 of the second air discharge valve block are 0.1-1. Further, the pump body assembly further comprises a first air discharge valve block and a second air discharge valve block, wherein the first air discharge valve block is used for discharging air of the first air cylinder and the second air cylinder, and the second air discharge valve block is used for discharging air of the third air cylinder, and the width b1 of the first air discharge valve block and the width b2 of the second air discharge valve block are 0.1-2/b 1-1. Further, the pump body assembly further comprises a first air discharge valve block and a second air discharge valve block, wherein the first air discharge valve block is used for discharging air