CN117514802A - Compressor and refrigeration equipment - Google Patents
Compressor and refrigeration equipment Download PDFInfo
- Publication number
- CN117514802A CN117514802A CN202310548116.8A CN202310548116A CN117514802A CN 117514802 A CN117514802 A CN 117514802A CN 202310548116 A CN202310548116 A CN 202310548116A CN 117514802 A CN117514802 A CN 117514802A
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- compressor
- shell
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- oil
- cylinder
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 73
- 238000003860 storage Methods 0.000 claims abstract description 70
- 239000002826 coolant Substances 0.000 claims abstract description 3
- 239000003507 refrigerant Substances 0.000 claims description 30
- 239000011148 porous material Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 101
- 239000010687 lubricating oil Substances 0.000 description 22
- 238000005461 lubrication Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/10—Stators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
Abstract
The invention discloses a compressor and refrigeration equipment, wherein the compressor comprises a shell, a cylinder, a liquid reservoir and a connecting pipe, wherein an oil storage tank is formed at the bottom of the shell; the air cylinder is arranged in the shell, and the shell is provided with an air suction port communicated with the air cylinder; the liquid storage device is arranged at the lower end or the upper end of the shell, the air outlet of the liquid storage device is communicated with the air cylinder through the air suction port, and the inner diameter of the shell is consistent with the inner diameter of the liquid storage device; the height of the liquid storage device is H, the maximum vertical distance from the center of the air suction port to the bottom of the oil storage tank is H, and the relation between H and H satisfies the following conditions: 0.1< H/H <2; one end of the connecting pipe extends into the liquid reservoir, and the other end of the connecting pipe is connected with the air suction port for conveying the cooling medium, wherein the connecting pipe comprises a first pipe section and a second pipe section which are connected with each other. The technical scheme of the invention can reduce the transverse size of the compressor, improve the reliability of the compressor and facilitate the installation of the connecting pipe.
Description
The present application is a divisional application of chinese patent application with application number "202210930093.2", with application number "compressor and refrigeration device", with application date 2022, 08, 04.
Technical Field
The invention relates to the technical field of compressors, in particular to a compressor and refrigeration equipment.
Background
The reservoir of the conventional compressor is provided at the side of the housing, resulting in a large radial space occupied by the compressor and large vibration and noise generated when in use. The compressor sucks in the gaseous refrigerant to compress, the compression process is completed in the cylinder, and in order to keep the good lubrication of the operation parts in the cylinder, a certain amount of lubricating oil is needed, in the process, part of the lubricating oil is compatible with the refrigerant, and a large amount of refrigerant gas is discharged out of the cylinder and simultaneously takes away part of the lubricating oil (called oil discharge). Too big oil spit can form the oil film in the condenser inside, hinders the heat dissipation of refrigerant, and then influences refrigeration plant's refrigeration effect, and too big compressor spit oil can damage the compressor cylinder because there is not oil lubrication, and the refrigeration oil not only plays lubrication but also has sealed effect, so the oil level position decline in the oil pool of compressor bottom easily leads to the compressor to produce the trouble because of lubrication failure.
Disclosure of Invention
The main object of the present invention is to provide a compressor, which aims to reduce the lateral dimension of the compressor, improve the reliability of the compressor, and facilitate the installation of the connection pipe.
In order to achieve the above object, the present invention provides a compressor comprising:
the oil storage tank is formed at the bottom of the shell;
the air cylinder is arranged in the shell, and the shell is provided with an air suction port communicated with the air cylinder;
the liquid storage device is arranged at the lower end or the upper end of the shell, the air outlet of the liquid storage device is communicated with the air cylinder through the air suction port, and the inner diameter of the shell is consistent with the inner diameter of the liquid storage device; the height of the liquid storage device is H, the maximum vertical distance from the center of the air suction port to the bottom of the oil storage tank is H, and the relation between H and H satisfies the following conditions: 0.1< H/H <2; and
and one end of the connecting pipe extends into the liquid reservoir, and the other end of the connecting pipe is connected with the air suction port for conveying the cooling medium, wherein the connecting pipe comprises a first pipe section and a second pipe section which are connected with each other.
Optionally, the first pipe section is located in the liquid storage device, one end of the first pipe section is bent towards the top end of the liquid storage device, the other end part of the first pipe section extends out of the liquid storage device, one end of the second pipe section is connected to the extending part of the first pipe section, and the other end of the second pipe section is connected with the air suction port.
Optionally, the first pipe section and the second pipe section are integrally formed.
Optionally, the first pipe section is provided with an oil return hole, and an opening direction of the oil return hole faces to the bottom of the liquid reservoir.
Optionally, the equivalent diameter of the oil return hole is d 1 The equivalent diameter of the cross section of the connecting pipe is d 2 ，d 1 And d 2 The following are satisfied: 0.1%<((d 1 ) 2 /(d 2 ) 2 )*100％≤1.5％。
Optionally, the hole length of the oil return hole is L a The aperture of the oil return hole is L b Length of hole L a And pore diameter L b The following relationships are satisfied: 0.5<L a /L b ≤4。
Optionally, the effective volume of the liquid reservoir is V, and the volume between the height surface of the oil return hole and the bottom of the liquid reservoir is V, where the relationship between V and V satisfies: 0.015v <0.5v.
Optionally, the compressor further comprises a muffler connected to the cylinder.
Optionally, the inner diameter of the shell is d 3 The volume enclosed between the upper end surface of the cylinder and the muffler and the shell is v 1 The refrigerant filling amount of the refrigerant system is D, and the following conditions are satisfied:
[Π(h 1 +h 2 )×(d 3 ) 2 /4+v 1 ]/[Π(h 1 +h 2 )×(d 3 ) 2 /4+v 1 +D]≥0.18。
the invention also provides a refrigeration device comprising a compressor as described above.
According to the technical scheme, the oil storage tank is formed at the bottom of the shell by adopting the shell, the air cylinder and the liquid storage device; the air cylinder is arranged in the shell, and the shell is provided with an air suction port communicated with the air cylinder; the liquid reservoir is arranged at the lower end or the upper end of the shell, and the radial installation space required by the compressor can be greatly reduced by arranging the liquid reservoir below or above the shell. The air outlet of the liquid storage device is communicated with the air cylinder through the air suction port, and the inner diameter of the shell 10 is consistent with the inner diameter of the liquid storage device 30; the height of the liquid storage device is H, the maximum vertical distance from the center of the air suction port to the bottom of the oil storage tank is H, and the relation between H and H satisfies the following conditions: 0.1< H/H <2. By letting the height H of the reservoir and the height H of the reservoir satisfy the relation: the height of the liquid storage device is adjusted to solve the problem of oil output of the compressor on the premise of not expanding the inner diameter of the shell or increasing the original height of the oil pool, or the height of the liquid storage device is increased to solve the problem of oil output of the compressor on the premise of not changing the height and the capacity of the liquid storage device, so that the heat exchange efficiency and the energy efficiency index of the refrigeration cycle device are effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a compressor according to an embodiment of the present invention;
FIG. 2 is a graph of the relationship between the H/H ratio and the maximum vibration of the compressor;
FIG. 3 is a graph of the relationship between the H/H ratio and the oil discharge amount of the compressor;
FIG. 4 is a schematic view of another embodiment of a compressor according to the present invention;
FIG. 5 is (d) 1 ) 2 /(d 2 ) 2 A graph of the relationship between the ratio of (c) and the discharge temperature of the compressor;
FIG. 6 is an enlarged view of FIG. 1 at A;
FIG. 7 is an enlarged view at B in FIG. 4;
FIG. 8 is a graph of V/V ratio versus compressor capacity;
FIG. 9 is a graph of V/V ratio versus compressor inlet force.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Compressor | 32 | Lower cylinder cover |
| 10 | Shell body | 33 | Air outlet |
| 11 | Suction port | 13 | Connecting cover |
| 12 | Oil storage tank | 50 | Connecting pipe |
| 20 | Cylinder | 51 | First pipe section |
| 21 | Air inlet | 52 | Second pipe section |
| 30 | Liquid storage device | 511 | Oil return hole |
| 31 | Cylinder body | 60 | SilencingDevice for preventing and treating cancer |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides an embodiment of a compressor. The compressor is generally classified into a piston compressor, a screw compressor, a centrifugal compressor, a linear compressor, and the like. The piston compressor generally consists of a housing, an electric motor, a cylinder, a piston, control devices (starter and thermal protector) and a cooling system. The cooling modes include oil cooling and air cooling, and natural cooling. The linear compressor has no shaft and no cylinder, sealing and heat dissipating structure. Compressors used in the refrigeration and air conditioning industry are of 5 major types: reciprocating, screw, rotary, scroll, and centrifugal, where reciprocating is one of the most commonly used compressors in small and medium-sized commercial refrigeration systems. Screw compressors are mainly used in large commercial and industrial systems. Rotary compressors and scroll compressors are mainly used for household and small-capacity commercial air conditioning devices, and centrifugal compressors are widely used for air conditioning systems of large buildings. Domestic refrigerator and air conditioner compressors are nowadays of the volumetric type, which in turn can be divided into reciprocating and rotary type. The reciprocating compressor uses piston, crank, connecting rod mechanism or piston, crank, slide tube mechanism, and the rotary compressor uses rolling rotor. In commercial air conditioners, centrifugal, vortex and screw type air conditioners are also used.
The reservoir of the conventional compressor is provided at the side of the housing, resulting in a large radial space occupied by the compressor and large vibration and noise generated when in use. The compressor sucks in the gaseous refrigerant to compress, the compression process is completed in the cylinder, and in order to keep the good lubrication of the operation parts in the cylinder, a certain amount of lubricating oil is needed, in the process, part of the lubricating oil is compatible with the refrigerant, and a large amount of refrigerant gas is discharged out of the cylinder and simultaneously takes away part of the lubricating oil (called oil discharge). Too big oil spit can form the oil film in the condenser inside, hinders the heat dissipation of refrigerant, and then influences refrigeration plant's refrigeration effect, and too big compressor spit oil can damage the compressor cylinder because there is not oil lubrication, and the refrigeration oil not only plays lubrication but also has sealed effect, so the oil level position decline in the oil pool of compressor bottom easily leads to the compressor to produce the trouble because of lubrication failure. For the above-mentioned faults, it is often adopted to enlarge the inner diameter of the shell of the compressor or increase the height of the oil pool, so as to fill the shell with excessive frozen lubricating oil, so as to avoid the problem of excessive drop of the oil level due to discharge of part of frozen lubricating oil, however, the above-mentioned solution increases the cost of the compressor on one hand; on the other hand, the quantity of lubricating oil contained in the refrigerant gas cannot be reduced, so that a large quantity of refrigeration lubricating oil circulates in the system, and the heat exchange efficiency and the energy efficiency index of the system are directly reduced.
The present invention aims to improve the compactness of the accumulator 30 and the casing 10, reduce the lateral dimension of the compressor 100, and improve the reliability of the compressor 100.
Referring to fig. 1, in an embodiment of the present invention, the compressor 100 includes: a housing 10, a cylinder 20 and a liquid reservoir 30, wherein an oil storage tank 12 is formed at the bottom of the housing 10; the cylinder 20 is arranged in the shell 10, and the shell 10 is provided with an air suction port 11 communicated with the cylinder 20; the reservoir 30 is disposed at a lower end or an upper end of the housing 10, an air outlet 33 of the reservoir 30 communicates with the cylinder 20 via the air inlet 11, and an inner diameter of the housing 10 is identical to an inner diameter of the reservoir 30.
The height of the liquid storage device 30 is H, the maximum vertical distance from the center of the air suction port 11 to the bottom of the oil storage tank 12 is H, and the relationship between H and H satisfies: 0.1< H/H <2.
In the circular intake port 11, the center of the intake port 11 is the same as the center of the intake port 21 of the cylinder 20, and in the circular intake port 11, the center of the intake port 11 is the center, and the square intake port 11 is the intersection of the diagonal lines.
In one embodiment, the reservoir 30 is disposed at the lower end of the housing 10.
In another embodiment, the reservoir 30 is disposed at the upper end of the housing 10.
The inner diameter of the housing 10 corresponds to the inner diameter of the reservoir 30, which is defined as the inner diameter r of the housing 10, which is the case within a certain range 1 With the inner diameter r of the reservoir 30 2 The relation of (2) is as follows: r is more than or equal to 0.98 1 /r 2 Less than or equal to 1.02. I.e. within a certain range, the housing 10The inner diameter may be greater than the inner diameter of the reservoir 30, if r 1 /r 2 > 1.02, resulting in the need to change the structure of the housing 10 and the reservoir 30 or to add other parts to avoid nesting problems; alternatively, the inner diameter of the reservoir 30 may be larger than the inner diameter of the housing 10, if r 1 /r 2 < 0.98, resulting in the need to change the structure of the reservoir 30 and the housing 10 or to add other parts to avoid nesting problems. Further, it is necessary to increase the design cost and the manufacturing difficulty.
By locating the reservoir 30 below or above the housing 10, the radial installation space required for the compressor 100 can be significantly reduced. Compared with the scheme that the liquid storage device 30 is arranged on the periphery of the body part in the prior art, the embodiment of the invention can improve the structural compactness of the liquid storage device 30 and the shell 10, and reduce the transverse dimension of the compressor 100, thereby reducing the overall dimension of the compressor 100, being beneficial to realizing the miniaturization of the compressor 100 and improving the cabinet loading amount.
By letting the height H of the reservoir and the height H of the reservoir 30 satisfy the relation: 0.1< H/H <2, thereby improving the problem of oil output of the compressor 100 by adjusting the height of the liquid storage device 30 on the premise of not expanding the inner diameter of the shell 10 or increasing the original height of the oil storage device, or increasing the height of the oil storage device on the premise of not changing the height and capacity of the liquid storage device 30, further filling the shell 10 with lubricating oil with larger storage capacity, so as to avoid the problem of excessive drop of the oil level caused by discharging part of lubricating oil, and even if part of lubricating oil is discharged out of the shell 10 along with refrigerant gas, the oil level position of the oil storage device in the shell 10 is not greatly reduced, further effectively stabilizing the oil level position in the oil storage device of the shell 10, preventing the lubricating performance in the compression process of the cylinder 20 from being influenced by overlarge oil level position drop, and simultaneously effectively reducing the lubricating oil content in the refrigerant gas compressed and discharged by the cylinder 20, so that the circulating lubricating oil quantity in the refrigeration cycle device is greatly reduced, and the heat exchange efficiency and the energy efficiency index of the refrigeration cycle device are effectively improved.
For example, in one embodiment, the compressor 100 has a maximum condensing pressure greater than 3MPa.
Referring to fig. 2 and 3, the height of the reservoir 30 is fixed:
as shown in FIG. 2, when H/H > 2, the height H of the oil storage tank 12 is far higher than the height H of the liquid storage tank 30, on one hand, the overall height is obviously increased, the height of the oil storage tank 12 is increased to cause the cylinder 20 to move upwards, the integral center of gravity of the compressor 100 moves upwards synchronously, the vibration is deteriorated, and larger vibration and noise are generated during use; on the other hand, in this case, a large amount of oil is required to be sealed in the compressor 100 to ensure the oil level, which increases the cost of the compressor 100 and makes the economy poor.
As shown in FIG. 3, when H/H < 0.1, on the one hand, the oil level increases significantly with the reduction of the space of the oil reservoir 12, resulting in further deterioration of the oil discharge amount. That is, some of the lubricating oil is compatible with the refrigerant, and a large amount of refrigerant gas is discharged out of the cylinder 20, and at the same time, some of the lubricating oil is carried away (referred to as oil discharge amount). Too much oil discharge amount of the compressor 100 may damage the cylinder 20 of the compressor 100 because there is no oil to lubricate, and the compressor 100 may be easily failed due to poor lubrication. On the other hand, the closer the reservoir 30 is to the cylinder 20, the reliability risk of wear or even seizing of the slide is caused by deformation of the slide groove/inner diameter of the cylinder 20 due to thermal effects.
For example, on the premise of fixed reservoir height:
when H/H > 2, the height of the liquid reservoir 30 is smaller, and the liquid storage amount is insufficient, so that the liquid return of the compressor 100 is caused, and the performance is reduced. For reference, generally, liquid return refers to a phenomenon or process in which liquid refrigerant in an evaporator returns to the compressor 100 through a suction circuit when the compressor 100 is operated. Resulting from the refrigerant flowing back into the compressor 100 in liquid form to mix with the lubricant. When the lubricating oil is diluted to a sufficiently low level, the bearings cannot be sufficiently lubricated to cause abrasion to be increased, and further, the phenomena of current rise, noise and vibration of the compressor 100 become large, and finally, the compressor 100 is damaged, and the performance of the compressor 100 is reduced.
When H/H is less than 0.1, on one hand, the height of the liquid reservoir 30 is larger, so that excessive refrigerant is wasted, and on the other hand, the refrigerating effect is affected.
In another embodiment, the compressor 100 has a maximum condensing pressure of less than 3MPa. In this usage scenario, the height of the accumulator 30 may be greatly reduced, thereby reducing the height dimension of the compressor 100, and thus reducing the overall size of the compressor 100.
According to the technical scheme, the oil storage tank 12 is formed at the bottom of the shell 10 by adopting the shell 10, the air cylinder 20 and the liquid storage tank 30; the cylinder 20 is arranged in the shell 10, and the shell 10 is provided with an air suction port 11 communicated with the cylinder 20; the liquid storage device 30 is arranged at the lower end or the upper end of the shell 10, the air outlet 33 of the liquid storage device 30 is communicated with the air cylinder 20 through the air suction port 11, and the inner diameter of the shell is consistent with the inner diameter of the liquid storage device; the height of the liquid storage device 30 is H, the maximum vertical distance from the center of the air suction port 11 to the bottom of the oil storage tank is H, and the relationship between H and H satisfies: 0.1< H/H <2. By locating the reservoir 30 below or above the housing 10, the radial installation space required for the compressor 100 can be significantly reduced. By letting the height H of the reservoir and the height H of the reservoir 30 satisfy the relation: 0.1< H/H <2, thereby improving the problem of oil output of the compressor 100 by adjusting the height of the liquid storage device 30 on the premise of not expanding the inner diameter of the shell 10 or increasing the original height of the oil pool, or improving the problem of oil output of the compressor 100 by increasing the height of the oil storage pool on the premise of not changing the height and capacity of the liquid storage device 30, and further effectively improving the heat exchange efficiency and energy efficiency index of the refrigeration cycle device.
After the reservoir 30 is placed under the housing 10 of the compressor 100, the oil reservoir is in a high pressure region and the reservoir 30 is in a low pressure region. Referring to fig. 4, in an embodiment, for convenience of installation, the housing 10 further includes a connection cover 13, the connection cover 13 is used to connect the housing 10 and the reservoir 30, in this embodiment, the housing 10 may be provided with two open ends, on the one hand, to facilitate installation of internal components, in particular, the connection cover 13 cooperates with the housing 10 to form the oil reservoir 12, and the height h of the edge of the housing 10 from the center of the air inlet 21 of the cylinder 20 to the lower opening is 1 One end of the connecting cover 13 is provided with an opening, such as a bowl shape, and the height from the lower end of the shell 10 to the bottom of the connecting cover 13 is h 2 ，h、h 1 And h 2 The relationship is as follows: h=h 1 +h 2 . Thus, only the calculation (h 1 +h 2 ) And (3) withH is set to satisfy the condition that 0.1< (H 1 +h 2 ) And H is smaller than 2. In addition, the bottom of the housing is generally curved excessively, so that the height of the oil reservoir 12 can be conveniently measured, and in the actual measurement process, the height from the center of the air suction port 11 to the lower end edge of the housing 10 and the height of the side wall of the connecting cover 13 can be measured only from the outer side of the housing 10, thereby simplifying the measurement process.
In another embodiment, the housing 10 is provided with an opening at the upper end, so that the driving device, the air cylinder 20 and the like can be conveniently arranged, and the housing 10 and the connecting cover 30 are integrally formed. The oil storage tank is positioned at the lower end of the shell 10, and the periphery of the upper opening of the liquid storage tank 30 is welded with the periphery of the lower end of the shell 10, so that the sealing of the liquid storage tank 30 is ensured.
In order to facilitate the installation and assembly of the reservoir 30, the reservoir 30 includes a cylinder 31 having two open ends and a lower cylinder cover 32, and the lower cylinder cover 32 covers the lower opening of the cylinder 31.
In one embodiment, the lower cylinder cover 32 is welded to the lower end opening of the cylinder block 31.
In another embodiment, the lower cylinder head 32 is integrally formed with the cylinder block 31.
Referring to fig. 4 in combination, the reservoir 30 includes a cylinder 31 and a lower cylinder cover 32 having openings at both ends, the lower end of the cylinder 31 is connected with the lower cylinder cover 32, and the edge of the opening at the upper end of the cylinder 31 is welded with the lower periphery of the connection cover 13 to ensure sealability; in order to facilitate the measurement of the height of the reservoir 30, the edge of the upper end opening to the edge of the lower end opening of the cylinder 31 is a height H 1 ，H 1 Is approximately the height of H, so that only the height (H 1 +h 2 ) And H is 1 Is such that it satisfies the relation of 0.1< (h 1 +h 2 )/H 1 And <2, thereby facilitating the measurement and calculation of the relationship between the height of the reservoir 30 and the height of the reservoir 12.
Specifically, the connection cover 13 is welded to the housing 10 and the reservoir 30. In order to avoid the influence of the stress generated by the welding of the connecting cover 13 and the shell 10 on the operation of the cylinder 20, h 1 Not less than the distance from the center of the intake port 21 of the cylinder 20 to the bottom of the cylinder 20.
Further, the compressor 100 further includes a connection pipe 50, one end of the connection pipe 50 extends into the accumulator 30, and the other end is communicated with the air inlet 21 of the cylinder 20, so as to facilitate refrigerant transportation.
In an embodiment, the bottom of the side of the reservoir 30 is provided with an air outlet, and one end of the connecting tube 50 extends out of the reservoir 30 through the air outlet and bends upwards to increase the air inlet height of the connecting tube 50, so as to avoid the liquid refrigerant from being sucked.
In other embodiments, the air outlet of the liquid storage device 30 is disposed at the top of the side, i.e. near the upper opening of the liquid storage device 30, so as to increase the air inlet height of the connecting tube 50 to avoid liquid refrigerant from being sucked.
Specifically, to facilitate the installation of the connection pipe 50, the connection pipe 50 includes a first pipe section 51 and a second pipe section 52, the first pipe section 51 is located in the reservoir 30, one end of the first pipe section 51 is bent toward the top end of the reservoir 30, the other end is connected to the exhaust port and extends out of the exhaust port, one end of the second pipe section 52 is sleeved on the extending portion of the first pipe section 51, and the other end is connected to the air inlet 21 of the air cylinder 20.
In order to secure the sealing property, a sealing process is performed in a gap between the vent of the reservoir 30 and the first pipe section 51.
Without loss of generality, in other embodiments, the first tube section 51 and the second tube section 52 may also be integrally formed, such as by casting, injection molding, or the like.
Further, in order to improve the efficiency and reliability of the compressor 100, the first pipe section 51 is provided with an oil return hole 511 so as to supplement the circulated lubricating oil in the reservoir 30 into the oil reservoir 12. In an embodiment, the oil return hole 511 may be disposed above the first pipe section 51; in another embodiment, the oil return hole 511 may be provided at a side of the first pipe.
For good oil return, in one embodiment, the oil return hole 511 is open toward the bottom of the reservoir 30. Specifically, the oil return hole 511 is provided at a position of the first pipe section 51 near the air outlet 33.
Thus, on the premise of not expanding the inner diameter of the shell 10 or increasing the original height of the oil pool, the lubricating oil deposited at the bottom of the liquid reservoir 30 can enter the connecting pipe 50 through the oil return hole 511 and be sucked by the air cylinder 20 into the oil storage pool in the shell 10 so as to supplement the lubricating oil in the oil storage pool, thereby effectively improving the heat exchange efficiency and the energy efficiency index of the refrigeration cycle device. The liquid lubricant in the oil-gas mixture entering the reservoir 30 falls to the bottom of the reservoir 30 under the action of gravity, and the lubricant at the bottom of the reservoir 30 can be returned to the reservoir through the oil return hole 511 on the connecting pipe 50, thereby realizing the circulation of the lubricant in the reservoir and the reservoir 30.
To ensure smoothness of oil return and to avoid performance of the compressor 100.
Referring to fig. 5 and 6, further, the oil return hole 511 has an equivalent diameter d 1 (equivalent diameter means circular tube diameter with equal hydraulic radius), and the equivalent diameter of the cross section of the connecting tube 50 is d 2 ，d 1 And d 2 The following are satisfied: 0.1%<((d1) 2 /(d2) 2 )*100％≤1.5％。
In order to ensure a small amount of liquid return, liquid impact on the compressor is avoided, and the liquid impact is not more than 0.1 percent (d 1 ) 2 /(d 2 ) 2 ≤1.5％。
The oil return quantity of the compressor is intuitively reflected in the change of the exhaust temperature, and the oil return can lead to smaller DeltaT, (d) 1 ) 2 /(d 2 ) 2 < 0.1%, or (d) 1 ) 2 /(d 2 ) 2 Smaller delta T (delta T) more than 1.5%, lower temperature of an oil pool can be caused besides performance reduction of the compressor, viscosity reduction of oil in the compressor is caused, and reliability risk of friction pair lubrication is insufficient.
Referring to fig. 7, further, in order to ensure smoothness of oil return and performance of the compressor, the oil return hole (511) has a hole length La, the oil return hole (511) has a hole diameter Lb, and the hole length La and the hole diameter Lb satisfy the relationship: la/Lb is less than or equal to 4 and is 0.5 <.
According to the short hole return flow rate CqAr (2 [ v ] P/rho) 1/2, [ v ] P is the pressure difference between the inside and the outside of the short hole, ar is the area of the oil return hole 511, and the actual return flow rate through the short hole is known by calculation: (d) 1 ) 2 /(d 2 ) 2 The XCq should be smallAt 1.5% x suction mass flow, the performance of the compressor 100 at slight liquid return is guaranteed. (d) 1 ) 2 /(d 2 ) 2 The flow rate of the XCq being more than 0.1% ensures smooth oil return. Therefore, the oil return hole 511 is provided as a short hole, and the oil return amount and the smoothness of the oil return are ensured.
Referring to fig. 1 and 4, further, in order to ensure the oil return effect of the oil return hole 511 and avoid the performance influence on the compressor 100, the effective volume of the component of the liquid reservoir 30 is V, and the volume between the height surface of the oil return hole 511 and the bottom of the liquid reservoir 30 is V, where V satisfies: v is more than 0.015 and less than 0.5V.
The effective volume V means: the first tube section 511 is adjacent to the volume connecting the inlet of the cover 13 to the bottom of the reservoir 30.
Referring to fig. 8 in combination, when V < 0.015V, that is, when V is smaller, the liquid storage amount is insufficient, and when the system is in liquid carrying operation, liquid returning of the compressor 100 is caused, and there is a risk of liquid impact, which affects the performance of the compressor 100, that is, performance degradation caused by liquid returning is caused.
Referring to fig. 9 in combination, when V > 0.5V, the oil storage volume is large, which makes the oil return of the oil return hole 511 difficult, and after a period of operation, the oil level in the oil storage tank is lowered, which further results in insufficient lubrication of the friction pair and increased force.
Further, when the compressor 100 is disposed in the refrigeration device, the refrigerant charge of the refrigeration device is D, and the relationship between the effective volume V and D of the accumulator 30 satisfies: 0.5D is less than V rho and less than D, the density of the liquid refrigerant is rho, and the liquid storage device 30 is used for ensuring the maximum redundancy in the refrigerant deposition state according to more than 50% of the total refrigerant storage amount. Thereby improving the performance of the compressor 100.
Further, in order to improve the performance of the compressor 100, the compressor 100 further comprises a muffler 60, the muffler 60 is connected with the cylinder 20, the tightness of high-pressure gas in the cylinder 20 is guaranteed through the arrangement of the muffler 60, the air tightness of a silencing cavity is guaranteed, the leakage of the high-pressure gas is avoided, and therefore the performance stability of the refrigeration compressor 100 is improved, and the service performance of the compressor 100 is improved. Thereby improving the performance stability of the refrigerant compressor 100 and further improving the service performance of the compressor 100.
Further, the inner diameter of the shell 10 is d 3 The volume enclosed by the parts above the upper end surface of the cylinder 20 and below the upper end surface of the upper silencer 60 and the periphery of the shell 10 is v 1 The refrigerant filling amount of the air conditioner is D, and the following conditions are satisfied:
[Π(h 1 +h 2 )×(d 3 ) 2 /4+v 1 ]/[Π(h 1 +h 2 )×(d 3 ) 2 /4+v 1 +D]≥0.18
the minimum oil sealing amount and the refrigerant filling amount of the system are ensured to meet the dilution requirement, so that the reliability requirement of the pump body is further ensured.
Without loss of generality, the compressor 100 may be a single cylinder 20 compressor 100; of course, the compressor 100 may also be a twin-cylinder 20 compressor 100, and the related parameter (h 1 /v 1 ) The corresponding positions of the lower cylinder 20 are the measuring objects.
The present invention also proposes a refrigeration device, which includes a compressor 100, where the specific structure of the compressor 100 refers to the above embodiment, and since the refrigeration device adopts all the technical solutions of all the above embodiments, at least the refrigeration device has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be described in detail herein.
The refrigerating apparatus may be classified into a compression refrigerating apparatus, an absorption refrigerating apparatus, a vapor injection refrigerating apparatus, a heat pump refrigerating apparatus, an electric heating refrigerating apparatus, and the like. The refrigeration equipment mainly comprises a compressor 100, an expansion valve, an evaporator, a condenser, accessories and pipelines. Such as a refrigerator, an air conditioner, etc.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. A compressor, comprising:
the oil storage tank is formed at the bottom of the shell;
the air cylinder is arranged in the shell, and the shell is provided with an air suction port communicated with the air cylinder;
the liquid storage device is arranged at the lower end or the upper end of the shell, the air outlet of the liquid storage device is communicated with the air cylinder through the air suction port, and the inner diameter of the shell is consistent with the inner diameter of the liquid storage device; the height of the liquid storage device is H, the maximum vertical distance from the center of the air suction port to the bottom of the oil storage tank is H, and the relation between H and H satisfies the following conditions: 0.1< H/H <2; and
and one end of the connecting pipe extends into the liquid reservoir, and the other end of the connecting pipe is connected with the air suction port for conveying the cooling medium, wherein the connecting pipe comprises a first pipe section and a second pipe section which are connected with each other.
2. The compressor of claim 1, wherein the first tube section is positioned in the reservoir, one end of the first tube section is bent toward a top end of the reservoir, the other end portion of the first tube section extends out of the reservoir, one end of the second tube section is connected to the first tube section extending portion, and the other end of the second tube section is connected to the suction port.
3. The compressor of claim 2, wherein the first tube section and the second tube section are integrally formed.
4. The compressor of claim 2, wherein the first pipe section is provided with an oil return hole, and an opening direction of the oil return hole is toward a bottom of the accumulator.
5. The compressor of claim 4, wherein the oil return hole has an equivalent diameter d 1 The equivalent diameter of the cross section of the connecting pipe is d 2 ，d 1 And d 2 The following are satisfied: 0.1%<((d 1 ) 2 /(d 2 ) 2 )*100％≤1.5％。
6. The compressor of claim 5, wherein the oil return hole has a hole length of L a The aperture of the oil return hole is L b Length of hole L a And pore diameter L b The following relationships are satisfied: 0.5<L a /L b ≤4。
7. The compressor of claim 6, wherein the effective volume of the reservoir is V, and the volume between the height surface of the oil return hole and the bottom of the reservoir is V, wherein the relationship between V and V satisfies: 0.015v <0.5v.
8. The compressor of claim 1, further comprising a muffler coupled to the cylinder.
9. The compressor of claim 8, wherein said housing has an inner diameter d 3 The volume enclosed between the upper end surface of the cylinder and the muffler and the shell is v 1 The refrigerant filling amount of the refrigerant system is D, and the following conditions are satisfied:
[Π(h 1 +h 2 )×(d 3 ) 2 /4+v 1 ]/[Π(h 1 +h 2 )×(d 3 ) 2 /4+v 1 +D]≥0.18。
10. a refrigeration device comprising a compressor as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310548116.8A CN117514802A (en) | 2022-08-04 | 2022-08-04 | Compressor and refrigeration equipment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310548116.8A CN117514802A (en) | 2022-08-04 | 2022-08-04 | Compressor and refrigeration equipment |
| CN202210930093.2A CN117552982A (en) | 2022-08-04 | 2022-08-04 | Compressor and refrigeration equipment |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210930093.2A Division CN117552982A (en) | 2022-08-04 | 2022-08-04 | Compressor and refrigeration equipment |
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| CN117514802A true CN117514802A (en) | 2024-02-06 |
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| CN202210930093.2A Pending CN117552982A (en) | 2022-08-04 | 2022-08-04 | Compressor and refrigeration equipment |
| CN202310548116.8A Pending CN117514802A (en) | 2022-08-04 | 2022-08-04 | Compressor and refrigeration equipment |
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| CN202210930093.2A Pending CN117552982A (en) | 2022-08-04 | 2022-08-04 | Compressor and refrigeration equipment |
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| WO (1) | WO2024027439A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000337737A (en) * | 1999-05-26 | 2000-12-08 | Mitsubishi Heavy Ind Ltd | Air conditioner and accumulator |
| JP7216552B2 (en) * | 2019-01-07 | 2023-02-01 | 三菱重工サーマルシステムズ株式会社 | rotary compressor |
| CN110966201A (en) * | 2019-12-12 | 2020-04-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor lubricating oil backflow structure and compressor |
| JP7452685B2 (en) * | 2020-09-30 | 2024-03-19 | 株式会社富士通ゼネラル | hermetic compressor |
| CN214837127U (en) * | 2021-01-20 | 2021-11-23 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigeration equipment |
| CN113550903A (en) * | 2021-08-23 | 2021-10-26 | 广东美芝制冷设备有限公司 | Compressor and refrigeration equipment |
| CN217873273U (en) * | 2022-08-04 | 2022-11-22 | 广东美芝制冷设备有限公司 | Compressor and refrigerating device |
| CN217926303U (en) * | 2022-08-04 | 2022-11-29 | 广东美芝制冷设备有限公司 | Compressor and refrigeration equipment |
-
2022
- 2022-08-04 CN CN202210930093.2A patent/CN117552982A/en active Pending
- 2022-08-04 CN CN202310548116.8A patent/CN117514802A/en active Pending
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| WO2024027439A1 (en) | 2024-02-08 |
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