CN116771645A - Air inlet assembly and compressor - Google Patents
Air inlet assembly and compressor Download PDFInfo
- Publication number
- CN116771645A CN116771645A CN202210237815.6A CN202210237815A CN116771645A CN 116771645 A CN116771645 A CN 116771645A CN 202210237815 A CN202210237815 A CN 202210237815A CN 116771645 A CN116771645 A CN 116771645A
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- cylinder
- air inlet
- connecting portion
- pipe
- wall
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- 239000003507 refrigerant Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Compressor (AREA)
Abstract
The invention belongs to the technical field of compressors, and discloses an air inlet assembly and a compressor, wherein the air inlet assembly comprises a liquid reservoir air inlet pipe and an air inlet connecting pipe, and one end of the liquid reservoir air inlet pipe is communicated with a liquid reservoir; the air inlet connecting pipe comprises a first connecting part and a second connecting part arranged at one end of the first connecting part, the first connecting part is communicated with the other end of the liquid storage device air inlet pipe, and part of the air inlet connecting pipe stretches into the cylinder to be in interference fit with the cylinder, the second connecting part is positioned in the cylinder, a gap is formed between the outer wall of the second connecting part and the inner wall of the cylinder, and the refrigerant can enter the cylinder through the liquid storage device air inlet pipe, the first connecting part and the second connecting part. According to the air inlet assembly provided by the invention, the first connecting part is in interference fit with the air cylinder, the second connecting part is positioned in the air cylinder, a gap is arranged between the outer wall of the second connecting part and the inner wall of the air cylinder, and the second connecting part is in a suspended state, so that the heat convection coefficient of the air inlet connecting pipe is reduced, the heat exchange quantity of air inlet is reduced, and the temperature of the air inlet of the air cylinder is lowered.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to an air inlet assembly and a compressor.
Background
The compressor is a fluid machine that lifts low-pressure gas into high-pressure gas. During operation, low-temperature low-pressure refrigerant gas enters the cylinder from the air inlet pipe, the cylinder compresses the low-temperature low-pressure refrigerant gas, and then high-temperature high-pressure refrigerant gas is discharged from the exhaust pipe to provide power for the refrigeration cycle, so that the refrigeration cycle of compression, condensation, expansion and evaporation is realized. As shown in fig. 1, one end of the air inlet pipe 10 is communicated with the liquid reservoir, the other end of the air inlet pipe 10 is communicated with the air inlet end of the compression cylinder 20, and the outer wall of the air inlet pipe 10 is attached to the inner wall of the compression cylinder 20. In operation, the high temperature oil pool heats the compression cylinder 20 and the intake pipe 10, and heats the refrigerant flowing through the intake pipe 10, resulting in an increase in suction temperature, a decrease in suction density, and a decrease in suction volume, resulting in a decrease in volumetric efficiency and a decrease in compressor performance.
Disclosure of Invention
The invention aims to provide an air inlet assembly, which reduces the convection heat exchange coefficient, reduces the heat exchange quantity of air inlet and reduces the temperature of an air inlet of an air cylinder.
To achieve the purpose, the invention adopts the following technical scheme:
an intake assembly for transporting a refrigerant, comprising:
the liquid storage device comprises a liquid storage device air inlet pipe, wherein one end of the liquid storage device air inlet pipe is communicated with a liquid storage device;
the air inlet connecting pipe comprises a first connecting part and a second connecting part arranged at one end of the first connecting part, wherein the first connecting part is communicated with the other end of the air inlet pipe of the liquid storage device, and part of the air inlet pipe extends into the air cylinder to be in interference fit with the air cylinder, the second connecting part is positioned in the air cylinder, a gap is formed between the outer wall of the second connecting part and the inner wall of the air cylinder, and the refrigerant can enter the air cylinder through the air inlet pipe of the liquid storage device, the first connecting part and the second connecting part.
Preferably, the gap communicates with the cylinder to enable the refrigerant to enter the gap.
Preferably, a boss is provided on an inner wall of the cylinder, and an end of the second connecting portion abuts against the boss to close the gap.
Preferably, the air inlet connecting pipe further comprises a third connecting part arranged at one end, far away from the first connecting part, of the second connecting part, wherein the third connecting part is positioned in the cylinder and is abutted to the inner wall of the cylinder so as to close the gap.
Preferably, the gap between the outer wall of the second connecting part and the inner wall of the cylinder is d, and d is more than or equal to 0.3mm and less than or equal to 1.2mm.
Preferably, the length of the air inlet connecting pipe extending into the cylinder is L, and the length of the first connecting part extending into the cylinder is L 1 The length of the second connecting part is L 2 Wherein, the method comprises the steps of, wherein,
preferably, one end of the first connecting portion, which is far away from the second connecting portion, is in a flaring shape, and the air inlet pipe of the liquid storage device extends into the first connecting portion and is in interference fit with the first connecting portion.
Preferably, the first connecting portion and the second connecting portion are integrally formed.
The invention also provides a compressor which comprises a cylinder and the air inlet assembly, wherein the air inlet connecting pipe is communicated with the cylinder.
Preferably, the inner wall of the cylinder is provided with a containing groove, and the second connecting part is abutted to the groove wall of the containing groove so as to close the gap.
The invention has the beneficial effects that:
according to the air inlet assembly provided by the invention, the refrigerant can flow out through the liquid accumulator and enter the air cylinder through the air inlet pipe of the liquid accumulator, the first connecting part and the second connecting part, the air cylinder compresses the refrigerant, and then high-temperature and high-pressure refrigerant gas is discharged from the exhaust pipe to provide power for the refrigeration cycle, so that the refrigeration cycle of compression, condensation, expansion and evaporation is realized. The first connecting portion is in interference fit with the air cylinder, the second connecting portion is located in the air cylinder, a gap is formed between the outer wall of the second connecting portion and the inner wall of the air cylinder, the second connecting portion is in a suspended state in the air cylinder, the flow speed of a refrigerant in the air inlet connecting pipe is reduced, the heat convection coefficient of the air inlet connecting pipe is reduced, accordingly the air inlet heat exchange amount is reduced, and the air inlet heat exchange temperature is reduced.
Drawings
FIG. 1 is a schematic view of a connection structure of an intake pipe and a cylinder in the background art;
FIG. 2 is a schematic view of an air intake assembly and cylinder connection according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a connection structure of an air intake assembly and a cylinder according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of an air intake assembly and cylinder connection according to a third embodiment of the present invention.
In the figure:
in fig. 1:
10. an air inlet pipe; 20. a compression cylinder;
fig. 2 to 4:
100. a cylinder; 101. a boss; 102. an air inlet of the air cylinder;
1. an air inlet pipe of the liquid storage device;
2. an air inlet connecting pipe; 21. a first connection portion; 22. a second connecting portion; 23. a third connecting portion;
3. a gap.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In describing embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the embodiments of the present invention, the terms "upper", "lower", "right", and the like are used for convenience of description and simplicity of operation based on the azimuth or positional relationship shown in the drawings, and are not to be construed as limiting the present invention, as the means or elements referred to must have a specific azimuth, be constructed and operated in a specific azimuth. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Example 1
The embodiment provides an air inlet assembly for transporting a refrigerant, as shown in fig. 2, the air inlet assembly comprises a liquid storage device air inlet pipe 1 and an air inlet connecting pipe 2, and one end of the liquid storage device air inlet pipe 1 is communicated with a liquid storage device; the air inlet connecting pipe 2 comprises a first connecting part 21 and a second connecting part 22 arranged at one end of the first connecting part 21, wherein the first connecting part 21 is communicated with the other end of the liquid storage air inlet pipe 1, and part of the air inlet connecting pipe extends into the air cylinder 100 to be in interference fit with the air cylinder 100, the second connecting part 22 is positioned in the air cylinder 100, a gap 3 is formed between the outer wall of the second connecting part 22 and the inner wall of the air cylinder 100, and a refrigerant can enter the air cylinder 100 through the liquid storage air inlet pipe 1, the first connecting part 21 and the second connecting part 22. Specifically, the outlet end of the inlet connection pipe 2 is directed toward the cylinder inlet 102, thereby transporting the refrigerant to lower the temperature of the cylinder inlet 102.
In the air intake assembly provided in this embodiment, the refrigerant can flow out through the liquid accumulator and enter the cylinder 100 through the liquid accumulator air inlet pipe 1, the first connecting portion 21 and the second connecting portion 22, after the cylinder 100 compresses the refrigerant, the high-temperature and high-pressure refrigerant gas is discharged from the air outlet pipe to power the refrigeration cycle, thereby realizing the refrigeration cycle of compression, condensation, expansion and evaporation. The first connecting portion 21 is in interference fit with the air cylinder 100, the second connecting portion 22 is located in the air cylinder 100, a gap 3 is formed between the outer wall of the second connecting portion 22 and the inner wall of the air cylinder 100, the second connecting portion 22 is in a suspended state in the air cylinder 100, the flow speed of the refrigerant in the air inlet connecting pipe 2 is reduced, the convection heat exchange coefficient of the air inlet connecting pipe 2 is reduced, accordingly the air inlet heat exchange amount is reduced, and the temperature of the air inlet 102 of the air cylinder is reduced. The air inlet assembly provided by the embodiment is communicated with the cylinder 100 of the compressor, so that the volumetric efficiency and performance of the compressor are improved.
Specifically, as shown in fig. 2, the gap 3 communicates with the cylinder 100 so that the refrigerant can enter the gap 3. When the refrigerant flows into the cylinder 100 along the accumulator intake pipe 1 and the intake connection pipe 2, a part of the low-temperature refrigerant fills the gap 3 between the second connection portion 22 and the cylinder 100, and since the gap 3 is a semi-closed space, the flow rate of the refrigerant filled in the gap 3 is low, and the flow rate is calculated according to the formula h=f (v 0.8 ) Wherein h is the convective heat transfer coefficient, v is the flow rate, and f is the coefficient, and according to the formula, the convective heat transfer coefficient is directly proportional to the flow rate: the smaller the flow velocity is, the smaller the convection heat transfer coefficient is, so that the reduction of the flow velocity is realized, the convection heat transfer coefficient is reduced, the heat exchange quantity of the inlet air is further reduced, and the temperature of the air inlet 102 of the air cylinder is reduced.
It should be noted that, for forced convection heat transfer in a pipeline, the most common correlation isConvection coefficient calculation formula->Obtaining a convection heat transfer coefficient calculation correlation formula according to the forced convection heat transfer correlation formula and the convection heat transfer coefficient calculation formula in the pipeline, wherein the convection heat transfer coefficient calculation correlation formula isWhere λ is the fluid thermal conductivity, ρ is the fluid density, cp is the fluid specific heat capacity, V is the fluid velocity, u is the fluid viscosity, and d is the tube inner diameter. Because the temperature variation of the fluid is small and the pipe diameter designed by the embodiment has small variation, the variation of each parameter of lambda, rho, cp, u and d in the formula is negligible. Since the gap 3 of the air intake assembly of the present embodiment is a semi-closed structure, the velocity of the fluid varies in magnitude, so the above formula can be simplified as a function of h and v, i.e., h=f (v 0.8 )。
Specifically, the first connecting portion 21 and the second connecting portion 22 are integrally formed, so that the processing is convenient, the processing difficulty is reduced, and the processing efficiency is improved. And it is not necessary to provide a special connection structure to connect the first connection portion 21 and the second connection portion 22.
Specifically, as shown in FIG. 2, the gap 3 between the outer wall of the second connecting portion 22 and the inner wall of the cylinder 100 is d,0.3 mm.ltoreq.d.ltoreq.1.2 mm, and the thermal conductivity and the convective heat transfer characteristics of the intake connecting pipe 2 are ensured, and the gap 3 is only required to be within the range of 0.3 mm.ltoreq.d.ltoreq.1.2 mm, for example, d may be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm.
Alternatively, the gap 3 may be in the range of 0.5 mm.ltoreq.d.ltoreq.0.8 mm, for example d may be 0.5mm, 0.6mm, 0.7mm, 0.8mm.
Specifically, as shown in fig. 2, the intake connection pipe 2 extends into the cylinder 100 by a length L, and the first connection portion 21 extends into the cylinder 100 by a length L 1 For effecting a sealed assembly between the inlet connection pipe 2 and the cylinder 100, the second connection portion 22 has a length L 2 To achieve a reduction in the convective heat transfer coefficient and a reduction in the convective heat transfer amount, wherein,more specificallyTo ensure an interference fit of the first connecting portion 21 with the cylinder 100, L 1 And 5mm or more.
Specifically, as shown in fig. 2, one end of the first connecting portion 21, which is far away from the second connecting portion 22, is in a flared shape, and the accumulator air inlet pipe 1 partially extends into the first connecting portion 21 and is in interference fit with the first connecting portion 21, so that the first connecting portion 21 and the accumulator air inlet pipe 1 are connected, and the subsequent transportation of the refrigerant is facilitated.
The embodiment also provides a compressor, including the cylinder 100 and the above-mentioned subassembly that admits air, form clearance 3 between the second connecting portion 22 of inlet connection pipe 2 and the cylinder 100, clearance 3 and cylinder 100 intercommunication are through reducing inlet connection pipe 2's heat convection coefficient to reduce the heat exchange volume of admitting air, reduced the temperature of cylinder air inlet 102, improved the volumetric efficiency and the performance of compressor.
Example two
The present embodiment provides an intake assembly, as shown in fig. 3, which includes a reservoir intake pipe 1 and an intake connecting pipe 2, the intake connecting pipe 2 includes a first connecting portion 21 and a second connecting portion 22, a boss 101 is provided on an inner wall of a cylinder 100, and an end portion of the second connecting portion 22 abuts against the boss 101 to close a gap 3. More specifically, the outlet end of the inlet connection pipe 2 is directed toward the cylinder inlet 102, thereby transporting the refrigerant to lower the temperature of the cylinder inlet 102. It can be understood that, the gap 3 is a closed structure, when the refrigerant flows into the cylinder 100 along the accumulator air inlet pipe 1 and the air inlet connecting pipe 2, the low-temperature refrigerant does not flow into the gap 3 between the air inlet connecting pipe 2 and the cylinder 100, and compared with the semi-closed structure gap 3 in the first embodiment, the air inlet assembly provided in the present embodiment has a lower flow velocity of the refrigerant and a smaller convective heat transfer coefficient, thereby reducing the amount of heat exchange of the air inlet and the temperature of the air inlet 102 of the cylinder.
In other embodiments, a receiving groove may be formed on the inner wall of the cylinder 100, and the second connecting portion 22 abuts against the groove wall of the receiving groove to close the gap 3, thereby forming a closed gap 3 structure, reducing the flow velocity of the refrigerant in the air inlet connection pipe 2, and thus reducing the convective heat transfer coefficient.
The embodiment also provides a compressor, including the cylinder 100 and the above-mentioned subassembly that admits air, form clearance 3 between the second connecting portion 22 of inlet connection pipe 2 and the cylinder 100, and the tip butt of second connecting portion 22 is in boss 101 on the cylinder 100 to closed clearance 3, reduced the convection heat transfer coefficient of inlet connection pipe 2, thereby reduced the heat exchange volume that admits air, reduced the temperature of cylinder air inlet 102, improved the volumetric efficiency and the performance of compressor.
Example III
The embodiment provides an air intake assembly, as shown in fig. 4, the air intake assembly includes a liquid storage intake pipe 1 and an air intake connecting pipe 2, the air intake connecting pipe 2 includes a first connecting portion 21 and a second connecting portion 22, the air intake connecting pipe 2 further includes a third connecting portion 23 disposed at one end of the second connecting portion 22 away from the first connecting portion 21, the third connecting portion 23 is disposed in the cylinder 100 and is abutted to the inner wall of the cylinder 100, so as to close the gap 3, thereby reducing the flow velocity of the refrigerant in the air intake connecting pipe 2, reducing the convective heat transfer coefficient of the air intake connecting pipe 2, and further reducing the air intake heat transfer amount. More specifically, the outlet end of the inlet connection pipe 2 is directed toward the cylinder inlet 102, thereby transporting the refrigerant to lower the temperature of the cylinder inlet 102.
The embodiment also provides a compressor, including the cylinder 100 and the above-mentioned air inlet assembly, form clearance 3 between the second connecting portion 22 of inlet connection pipe 2 and the cylinder 100, the third connecting portion 23 butt is in the inner wall of cylinder 100 to closed clearance 3, reduced the convection heat transfer coefficient of inlet connection pipe 2, thereby reduced the heat transfer volume of admitting air, reduced the temperature of cylinder air inlet 102, improved the volumetric efficiency and the performance of compressor.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. An intake assembly for transporting a refrigerant, comprising:
the liquid storage device comprises a liquid storage device air inlet pipe (1), wherein one end of the liquid storage device air inlet pipe (1) is communicated with a liquid storage device;
air inlet connecting pipe (2), including first connecting portion (21) and set up in second connecting portion (22) of first connecting portion (21) one end, first connecting portion (21) with the other end intercommunication of reservoir intake pipe (1), and the part stretch into in cylinder (100) with cylinder (100) interference fit, second connecting portion (22) are located in cylinder (100), just be provided with clearance (3) between the outer wall of second connecting portion (22) with the inner wall of cylinder (100), the refrigerant can pass through reservoir intake pipe (1) first connecting portion (21) and second connecting portion (22) get into cylinder (100).
2. An air intake assembly according to claim 1, wherein the gap (3) communicates with the cylinder (100) to enable the refrigerant to enter the gap (3).
3. An air intake assembly according to claim 1, characterized in that a boss (101) is provided on the inner wall of the cylinder (100), and the end of the second connecting portion (22) abuts against the boss (101) to close the gap (3).
4. An air intake assembly according to claim 1, wherein the air intake connecting pipe (2) further comprises a third connecting portion (23) disposed at an end of the second connecting portion (22) remote from the first connecting portion (21), the third connecting portion (23) being located in the cylinder (100) and abutting against an inner wall of the cylinder (100) to close the gap (3).
5. An air intake assembly according to claim 1, characterized in that the gap (3) between the outer wall of the second connection (22) and the inner wall of the cylinder (100) is d,0.3mm ∈d ∈1.2mm.
6. An air intake assembly according to claim 1, characterized in that the air intake connecting pipe (2) extends into the cylinder (100) by a length L, and the first connecting portion (21) extends into the cylinder (100) by a length L 1 The length of the second connecting part (22) is L 2 Wherein, the method comprises the steps of, wherein,
7. an air inlet assembly according to claim 1, characterized in that one end of the first connecting portion (21) far away from the second connecting portion (22) is in a flaring shape, and the air inlet pipe (1) of the liquid storage device partially stretches into the first connecting portion (21) and is in interference fit with the first connecting portion (21).
8. An air inlet assembly according to claim 1, characterized in that the first connection portion (21) and the second connection portion (22) are integrally formed.
9. A compressor comprising a cylinder (100) and an air intake assembly according to any one of claims 1-8, said air intake connection pipe (2) being in communication with said cylinder (100).
10. Compressor according to claim 9, characterized in that the inner wall of the cylinder (100) is provided with a receiving groove, and the second connecting portion (22) abuts against the groove wall of the receiving groove to close the gap (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210237815.6A CN116771645A (en) | 2022-03-11 | 2022-03-11 | Air inlet assembly and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210237815.6A CN116771645A (en) | 2022-03-11 | 2022-03-11 | Air inlet assembly and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116771645A true CN116771645A (en) | 2023-09-19 |
Family
ID=88006847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210237815.6A Pending CN116771645A (en) | 2022-03-11 | 2022-03-11 | Air inlet assembly and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116771645A (en) |
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2022
- 2022-03-11 CN CN202210237815.6A patent/CN116771645A/en active Pending
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