CN-121993401-A - Pump body assembly, fluid machinery and heat exchange equipment

CN121993401ACN 121993401 ACN121993401 ACN 121993401ACN-121993401-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 first flange, a second flange, a first cover plate, a third cylinder, a second cover plate and a first exhaust cavity, wherein a partition plate is arranged between the first cylinder and the second cylinder, the volume of the third cylinder is smaller than that of the first cylinder and that of the second cylinder respectively, the first cylinder and the second cylinder are located between the first flange and the second flange, the third cylinder is located between the second flange and the first cover plate, and the second cover plate is located between the second flange and the third cylinder, so that a first exhaust cavity of the second cylinder is formed between the second cover plate and the second flange. The invention solves the problem that the miniaturization design of the air cylinder in the fluid machinery in the prior art is limited.

Inventors

WEI HUIJUN
REN LIPING
FU ZHENG
SU YONGQIANG
YAN WEIHAO

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (13)

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 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); and a second cover plate (110), wherein the second cover plate (110) is positioned between the second flange (90) and the third cylinder (30), and a first exhaust cavity (130) of the second cylinder (20) is formed between the second cover plate (110) and the second flange (90).
2. Pump body assembly according to claim 1, characterized in that between the volume V1 of the first cylinder (10), the volume V2 of the second cylinder (20) and the volume V3 of the third cylinder (30) 0.03 +.v 3/(v1+v2) +.0.15 is satisfied.
3. Pump body assembly according to claim 1, characterized in that the volume V2 of the second cylinder (20), the minimum cross-sectional area S2 of the suction channel of the second cylinder (20), the volume V3 of the third cylinder (30), the minimum cross-sectional area S3 of the suction channel of the third cylinder (30) satisfy (V3/S3)/(V2/S2) 1.5.
4. 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.
5. Pump body assembly according to claim 1, characterized in that the pump body assembly further comprises a crankshaft (40), the crankshaft (40) comprising a main body part (41), a first enlarged diameter section (42), a second enlarged diameter section (43) and a reduced diameter section (44), the outer periphery of the first enlarged diameter section (42) and the outer periphery of the second enlarged diameter section (43) exceeding the outer periphery of the main body part (41), the outer periphery of the reduced diameter section (44) not exceeding the outer periphery of the main body part (41), the first enlarged diameter section (42), the second enlarged diameter section (43) and the reduced diameter section (44) being arranged eccentrically 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).
6. The pump body assembly according to claim 5, 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 expanding section (42) and the second expanding section (43) respectively drive the first roller (50) and the second roller (60) to move, and the reducing section (44) drives the third roller (70) to move.
7. The pump body assembly of claim 5, wherein the pump body assembly comprises, 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).
8. 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).
9. The pump body assembly according to claim 5, wherein 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).
10. Pump body assembly according to claim 1, characterized in that it further comprises a third cover plate (111), said third cover plate (111) being located on the side of the first cover plate (100) remote from the third cylinder (30), a second exhaust chamber (131) of the third cylinder (30) being formed between the third cover plate (111) and the first cover plate (100).
11. The pump body assembly of claim 1, wherein, The pump body assembly further comprises a muffler (140), wherein the muffler (140) is arranged outside the first flange (80) and is used for muffling the first cylinder (10), and/or The first exhaust chamber (130) is a sound deadening chamber of the second cylinder (20).
12. A fluid machine comprising a pump body assembly according to any one of claims 1 to 11.
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 with a partition therebetween, a third cylinder having a volume smaller than the volumes of the first cylinder and the second cylinder, respectively, a first flange and a second flange between the first flange and the second flange, a first cover plate between the second flange and the first cover plate, and a second cover plate between the second flange and the third cylinder, the second cover plate and the second flange forming a first exhaust chamber of the second cylinder therebetween. Further, the volume V1 of the first cylinder, the volume V2 of the second cylinder and the volume V3 of the third cylinder satisfy that V3/(V1 + V2) is less than or equal to 0.03 and less than or equal to 0.15. Further, the volume V2 of the second cylinder, the minimum sectional area S2 of the air suction channel of the second cylinder and the volume V3 of the third cylinder meet the requirement that (V3/S3)/(V2/S2) is less than or equal to 1.5. Further, the suction pressure of the third cylinder is greater than the suction pressure of the first cylinder and the suction pressure of the second cylinder, respectively. Further, the pump body assembly further comprises a crankshaft, the crankshaft comprises a main body part, a first expanding section, a second expanding section and a reducing section, the outer periphery of the first expanding section and the outer periphery of the second expanding section exceed the outer periphery of the main body part, the outer periphery of the reducing section does not exceed the outer periphery of the main body part, the first expanding section, the second expanding section and the reducing section are eccentrically arranged in the axial direction of the main body part, the first expanding section and the second expanding section are respectively located in the first cylinder and the second cylinder, and the reducing section is located in the third cylinder to respectively participate in the compression process in the rotation process of the crankshaft. Further, the pump body assembly further comprises a first roller, a second roller and a third roller, wherein the first roller and the second roller are respectively accommodated in the first cylinder and the second cylinder, the third roller is accommodated in the third cylinder, the first diameter expansion section and the second diameter expansion section respectively drive the first roller and the second roller to move, and the diameter reduction section drives the third roller to move. Further, the first and second expanded diameter sections are ecc