CN219754762U - Low-temperature refrigeration compressor improved by ejector - Google Patents
Low-temperature refrigeration compressor improved by ejector Download PDFInfo
- Publication number
- CN219754762U CN219754762U CN202321218388.3U CN202321218388U CN219754762U CN 219754762 U CN219754762 U CN 219754762U CN 202321218388 U CN202321218388 U CN 202321218388U CN 219754762 U CN219754762 U CN 219754762U
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- compressor
- ejector
- unit
- refrigeration
- pipeline
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 20
- 230000006835 compression Effects 0.000 abstract description 10
- 238000007906 compression Methods 0.000 abstract description 10
- 239000003921 oil Substances 0.000 abstract description 4
- 239000010687 lubricating oil Substances 0.000 abstract description 3
- 230000001502 supplementing effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses an ejector-based low-temperature refrigeration compressor, which relates to a refrigeration (or heat pump) compressor and a unit, and comprises a compressor and an ejector, wherein a low-pressure inlet of the ejector is connected with an air outlet of an evaporator of a refrigeration system through a pipeline, an air outlet of the ejector is connected with an air suction port of the compressor through a pipeline, an air exhaust end of the compressor is connected with a high-pressure port of the ejector through a pipeline, the compressor or the unit can run for a long time under the condition of lower compression ratio (generally and below), the compressor or the unit does not need to be additionally provided with an oil cooler, the compressor or the unit does not need to be additionally provided with an economizer (middle air supplementing), the using amount of refrigeration lubricating oil is reduced, and for the centrifugal unit, even the refrigeration lubricating oil is not needed to be used in the system, and the two-stage single-machine compression or two-stage single-machine compression can be replaced.
Description
Technical Field
The utility model relates to a refrigerating (or heat pump) compressor and a unit, in particular to a low-temperature refrigerating compressor which utilizes an ejector to reduce the compression ratio of the compressor or the unit at the air suction end under the working conditions such as high pressure ratio, high exhaust temperature, high oil cooling load and the like which lead to the severe operation condition of the compressor or the unit, so as to improve the performance and the service life of the compressor or the unit, simplify the related configuration and reduce the workload of later maintenance, and in particular to an ejector-based low-temperature refrigerating compressor.
Background
At present, in severe working conditions such as high compression ratio (generally more than 8), a compressor or a unit commonly used in the refrigeration (or heat pump) industry needs to be considered for configuring a special bearing, variable internal volume ratio (aiming at screw type), an oil cooler, an economizer (middle air supplementing) and the like, the system configuration is complex, and meanwhile, the compressor or the unit runs under severe working conditions for a long time, so that service life is reduced and later maintenance workload is increased, and the compressor or the unit needs to be replaced with bearings, shaft seals and lubricating oil and the like periodically.
Disclosure of Invention
The utility model aims to provide a low-temperature refrigeration compressor improved by an ejector, and aims to develop a novel refrigeration (or heat pump) cycle with the ejector at the air suction end for avoiding long-term operation under severe working conditions such as high compression ratio and the like aiming at a high-pressure ratio compressor or a unit commonly used in the refrigeration (or heat pump) industry, and the air suction pressure of the compressor or the unit is improved by utilizing the supercharging principle of the ejector, so that the compression ratio is reduced, and the operation condition is optimized.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides an utilize ejector to improve low temperature refrigeration compressor, includes compressor and ejector, the gas outlet of ejector passes through the pipeline and is connected with the induction port of compressor, the exhaust end of compressor passes through the pipeline and is connected with the high pressure interface of ejector.
As a further scheme of the utility model: the low pressure inlet of the ejector is connected with the air outlet of the evaporator of the refrigerating system through a pipeline.
Compared with the prior art, the utility model has the beneficial effects that:
1. the compressor or unit may be operated for a long period of time at lower compression ratios (generally and below);
2. the compressor or the unit does not need to be additionally provided with an oil cooler;
3. the compressor or the unit does not need to be additionally provided with an economizer (middle air supplementing);
4. the usage amount of the refrigeration lubricant is reduced, and for a centrifugal unit, the refrigeration lubricant is not even needed in the system;
5. can replace single-machine double-stage compression or double-machine double-stage compression.
Drawings
FIG. 1 is a schematic diagram of an ejector for improving a cryogenic refrigeration compressor.
Fig. 2 is a schematic diagram of an ejector for improving a cryorefrigeration compressor.
Fig. 3 is a pressure enthalpy diagram of an improved cryorefrigeration compressor utilizing an ejector.
The figure shows: a compressor 1 and an ejector 2.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 3, in an embodiment of the present utility model, an ejector is used to improve a low-temperature refrigeration compressor, and the low-temperature refrigeration compressor comprises a compressor 1 and an ejector 2, wherein a low-pressure inlet of the ejector 2 is connected with an air outlet of an evaporator of a refrigeration system through a pipeline, an air outlet of the ejector 2 is connected with an air suction port of the compressor 1 through a pipeline, and an air discharge end of the compressor 1 is connected with a high-pressure port of the ejector 2 through a pipeline.
The working principle of the utility model is as follows:
the gas discharged from the exhaust end of the compressor 1 is divided into 2 paths after being discharged from the compressor 1 (the pressure is P3 at the moment), 1 path of gas is distributed to a condenser, a throttle valve and an evaporator of a refrigerating system, the gas in the pipeline is used as refrigerating working medium, after being inhaled and evaporated, the gas enters a low-pressure inlet (the pressure is P1 at the moment) of the ejector 2, the other 1 path (the pressure is P3 at the moment) of gas enters a high-pressure interface of the ejector 2 and is used as ejecting working fluid, and after being mixed by the ejectors, the two paths of refrigerant fluid enter an air suction port of the compressor 1 (the pressure is P2 at the moment) and are compressed by the compressor 1 and then circulated again.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (2)
1. The utility model provides an utilize ejector to improve low temperature refrigeration compressor, includes compressor (1) and ejector (2), its characterized in that: the air outlet of the ejector (2) is connected with the air suction port of the compressor (1) through a pipeline, and the exhaust end of the compressor (1) is connected with the high-pressure port of the ejector (2) through a pipeline.
2. The ejector-modified cryogenic refrigeration compressor of claim 1, wherein: the low-pressure inlet of the ejector (2) is connected with the air outlet of the evaporator of the refrigerating system through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321218388.3U CN219754762U (en) | 2023-05-18 | 2023-05-18 | Low-temperature refrigeration compressor improved by ejector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321218388.3U CN219754762U (en) | 2023-05-18 | 2023-05-18 | Low-temperature refrigeration compressor improved by ejector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219754762U true CN219754762U (en) | 2023-09-26 |
Family
ID=88074310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321218388.3U Active CN219754762U (en) | 2023-05-18 | 2023-05-18 | Low-temperature refrigeration compressor improved by ejector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219754762U (en) |
-
2023
- 2023-05-18 CN CN202321218388.3U patent/CN219754762U/en active Active
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| GR01 | Patent grant |