CN219368026U - Refrigerating system with low-pressure circulation barrel - Google Patents
Refrigerating system with low-pressure circulation barrel Download PDFInfo
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- CN219368026U CN219368026U CN202223507321.XU CN202223507321U CN219368026U CN 219368026 U CN219368026 U CN 219368026U CN 202223507321 U CN202223507321 U CN 202223507321U CN 219368026 U CN219368026 U CN 219368026U
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- oil return
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- compressor
- pipeline
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- 239000007788 liquid Substances 0.000 claims abstract description 82
- 238000005057 refrigeration Methods 0.000 claims abstract description 25
- 239000003921 oil Substances 0.000 claims description 148
- 229910052731 fluorine Inorganic materials 0.000 claims description 21
- 239000011737 fluorine Substances 0.000 claims description 21
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 20
- 239000010687 lubricating oil Substances 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 description 19
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses a refrigerating system with a low-pressure circulation barrel, which comprises the low-pressure circulation barrel, a compressor, oil, a condenser and an electronic expansion valve, wherein a first air return port of the low-pressure circulation barrel is communicated with an air suction port pipeline of the compressor, an air exhaust port of the compressor is communicated with an air inlet pipeline of the oil, a first air outlet of the oil is communicated with the air inlet pipeline of the condenser, a liquid outlet of the condenser is communicated with a liquid inlet pipeline of the electronic expansion valve, and the electronic expansion valve is communicated with the first liquid inlet pipeline of the low-pressure circulation barrel; the utility model has two modes of mechanical circulation refrigeration and natural circulation refrigeration, meets the requirements for refrigeration conditions under the temperature environment of different seasons under the control of a control system, improves the efficiency of the refrigeration cycle of a machine room in the industries of a data center and the like, utilizes natural cold sources to the greatest extent, and obviously improves the energy-saving effect.
Description
Technical Field
The utility model relates to the technical field of refrigeration, in particular to a refrigeration system with a low-pressure circulation barrel.
Background
In the environment that needs constant temperature and humidity generates heat throughout the year, need accurate air conditioner refrigerating system to realize, when accurate air conditioning unit operates, partial lubricating oil can discharge the compressor along with the refrigerant and get into the system, only can the lubricating oil that discharges into the system can get back to the compressor through the separation measure, maintain the balance of lubricating oil in the compressor, can ensure that the compressor does not lack oil, and then avoid the compressor damage, if the oil level is the decompression compressor lack oil, can make the compressor lubrication deficiency and damage.
Disclosure of Invention
The utility model provides a refrigerating system with a low-pressure circulation barrel, aiming at the technical problems in the background art.
The utility model adopts the following technical scheme: the refrigerating system with the low-pressure circulation barrel comprises the low-pressure circulation barrel, a compressor, oil, a condenser and an electronic expansion valve, wherein a first air return port of the low-pressure circulation barrel is communicated with an air suction port pipeline of the compressor, an air exhaust port of the compressor is communicated with an air inlet pipeline of the oil, a first air exhaust port of the oil is communicated with the air inlet pipeline of the condenser, a liquid outlet of the condenser is communicated with a liquid inlet pipeline of the electronic expansion valve, and the electronic expansion valve is communicated with a first liquid inlet pipeline of the low-pressure circulation barrel to form a refrigerating cycle; the low-pressure circulating barrel further comprises a first electric valve and a second electric valve, wherein the first electric valve is connected with the compressor and oil in parallel, an air inlet of the first electric valve is communicated with a first air return pipeline of the low-pressure circulating barrel, and an air outlet of the first electric valve is communicated with an air inlet pipeline of the condenser; the second electric valve is connected in parallel with the electronic expansion valve, a liquid inlet of the second electric valve is communicated with a liquid outlet pipeline of the condenser, and a liquid outlet of the second electric valve is communicated with a first liquid inlet pipeline of the low-pressure circulation barrel; a first oil return pipeline is connected between the oil return port of the oil content and the compressor, and the first oil return pipeline is connected with an oil return electromagnetic valve and is used for returning lubricating oil separated from the oil content to the compressor; the low-pressure circulation barrel is internally provided with a high oil return point position, a medium oil return point position and a low oil return point position, the high oil return point position is connected with a first oil return branch, and the first oil return branch is connected with a high-position oil return stop valve and a high-position oil return electromagnetic valve; the middle oil return point is connected with a second oil return branch, and the second oil return branch is connected with a middle oil return stop valve and a middle oil return electromagnetic valve; the low oil return point is connected with a third oil return branch, and the third oil return branch is connected with a low-position oil return stop valve and a low-position oil return electromagnetic valve; the first oil return branch, the second oil return branch and the second oil return branch are mutually connected in parallel and are converged in a second oil return pipeline, a first oil return stop valve is connected to the second oil return pipeline, the second oil return pipeline is connected with a first liquid inlet pipeline of the plate exchanger, and a first air outlet of the plate exchanger is connected with an air return port pipeline of the compressor; and the second liquid inlet and the second liquid outlet of the plate exchanger are communicated with the liquid outlet pipeline of the condenser.
Further, the low-pressure circulation barrel is also connected with a plurality of groups of evaporation heat exchange circulation systems, each group of evaporation heat exchange circulation systems comprises a fluorine pump and a tail end evaporator, a liquid inlet of the fluorine pump is communicated with a liquid outlet pipeline at the bottom end of the low-pressure circulation barrel, a liquid outlet of the fluorine pump is communicated with a liquid inlet pipeline of the tail end evaporator, and a liquid outlet of the tail end evaporator is communicated with a second liquid inlet pipeline of the low-pressure circulation barrel.
Further, a third oil return pipeline is connected to the liquid outlet pipeline of each fluorine pump, a second oil return stop valve is connected to the third oil return pipeline, and the tail end of the third oil return pipeline is communicated with the second oil return pipeline.
Further, a liquid level meter is arranged in the low-pressure circulation barrel and used for detecting liquid level change in the barrel.
Furthermore, a spoiler is added to the liquid outlet of the low-pressure circulation barrel.
Further, the number of the end evaporators is multiple and the end evaporators are mutually connected in parallel.
Further, the number of the compressors is one or more, and the compressors can be one or more of a scroll compressor, a screw compressor or a centrifugal compressor.
Compared with the prior art, the utility model has the advantages that: the refrigerating system with the low-pressure circulating barrel has two operation modes of mechanical circulating refrigeration and natural circulating refrigeration, operates under the control of the control system, meets the requirements of refrigerating conditions in temperature environments in different seasons, improves the efficiency of the refrigerating cycle of a machine room in industries such as a data center, and the like, utilizes natural cold sources to the maximum extent, and obviously improves the energy-saving effect. The oil return system of the low-pressure circulating barrel is innovatively designed, so that efficient oil return in an oil-rich layer is guaranteed, and meanwhile, liquid refrigerant in lubricating oil is gasified through plate replacement, so that a compressor can be effectively protected, and the service life is prolonged.
Drawings
FIG. 1 is a schematic overall construction of an embodiment of a refrigeration system with a low pressure circulation tank according to the present utility model;
FIG. 2 is a schematic diagram of the operation of the present utility model in a mechanically cycled refrigeration state;
FIG. 3 is a schematic diagram of the operation of the present utility model when operating in a natural circulation refrigeration mode;
wherein: the device comprises a 1-low pressure circulation barrel, a 2-compressor, 3-oil, a 4-condenser, a 5-electronic expansion valve, a 6-first electric valve, a 7-second electric valve, an 8-first oil return pipeline, a 9-oil return electromagnetic valve, a 10-high-position oil return stop valve, a 11-high-position oil return electromagnetic valve, a 12-middle position oil return stop valve, a 13-middle position oil return electromagnetic valve, a 14-low-position oil return stop valve, a 15-low-position oil return electromagnetic valve, a 16-first oil return stop valve, a 17-plate change, a 18-fluorine pump, a 19-end evaporator, a 20-second oil return stop valve, a 21-liquid level meter, a 22-second oil return pipeline and a 23-third oil return pipeline.
Detailed Description
In the following, in order to facilitate the understanding of the technical solutions of the present utility model by a person skilled in the art, reference will be made to the accompanying drawings for further description. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the utility model. It may be evident, however, that one or more embodiments may be practiced without these specific details. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
Referring to fig. 1, an overall structure of an embodiment of a refrigeration system with a low-pressure circulation tank according to the present utility model includes a low-pressure circulation tank 1, a compressor 2, an oil component 3, a condenser 4 and an electronic expansion valve 5, wherein a first air return port of the low-pressure circulation tank 1 is communicated with an air inlet pipeline of the compressor 2, an air outlet of the compressor 2 is communicated with an air inlet pipeline of the oil component 3, one or more compressors 2 may be used, and one or more of a scroll compressor, a screw compressor or a centrifugal compressor may be used as the compressor 2. A first oil return line 8 is connected between the oil return port of the oil 3 and the compressor 2, and an oil return solenoid valve 9 is connected to the first oil return line for returning the lubricating oil separated from the oil to the compressor 2. In this embodiment, oil is added to the discharge port of the compressor 2, and 95% or more of the lubricating oil can be separated and returned to the compressor 2. The first air outlet of the oil component 3 is communicated with the air inlet pipeline of the condenser 4, the liquid outlet of the condenser 4 is communicated with the liquid inlet pipeline of the electronic expansion valve 5, and in specific implementation, the condenser 4 can be not limited to an air cooling type, a water cooling type or an evaporation cooling type. The electronic expansion valve 5 is communicated with a first liquid inlet pipeline of the low-pressure circulation barrel 1 to form refrigeration circulation;
the embodiment also comprises a first electric valve 6 and a second electric valve 7, wherein the first electric valve 6 is connected with the compressor 2 and the oil 3 in parallel, an air inlet of the first electric valve 6 is communicated with a first air return pipeline of the low-pressure circulation barrel 1, and an air outlet of the first electric valve 6 is communicated with an air inlet pipeline of the condenser 4; the second electric valve 7 is connected with the electronic expansion valve 5 in parallel, the liquid inlet of the second electric valve 7 is communicated with the liquid outlet pipeline of the condenser 4, and the liquid outlet of the second electric valve 7 is communicated with the first liquid inlet pipeline of the low-pressure circulation barrel 1;
when the mechanical refrigeration mode operation is performed in this embodiment, when the temperature in the environment is higher, the compressor 2 is operated, the compressor 2 sucks the low-temperature low-pressure gaseous refrigerant into the compressor 2 from the low-pressure circulation barrel, compresses the gaseous refrigerant into the high-temperature high-pressure gaseous refrigerant, enters the oil 3 to separate lubricating oil, enters the compressor 2 through the air suction pipe of the compressor 2, the separated refrigerant transfers heat to the environment through the condenser 4, the condensed liquid refrigerant is depressurized and cooled through the electronic expansion valve 5, and the low-temperature low-pressure liquid refrigerant is sent into the low-pressure circulation barrel 1 to form a reciprocating refrigeration cycle.
In this embodiment, when the temperature in the environment is low and the compressor 2 stops working, the gaseous refrigerant passes through the first electric valve 6 from the low-pressure circulation tank 1, heat is transferred to the environment through the condenser 4, and the condensed liquid refrigerant passes through the second electric valve 7 to send the liquid refrigerant into the low-pressure circulation tank 1, so as to form a reciprocating refrigeration cycle.
In this embodiment, a high oil return point position, a medium oil return point position and a low oil return point position are further arranged in the low-pressure circulation barrel 1, the high oil return point position is connected with a first oil return branch, the first oil return branch is connected with a high-position oil return stop valve 10 and a high-position oil return electromagnetic valve 11, the medium oil return point position is connected with a second oil return branch, the second oil return branch is connected with a medium-position oil return stop valve 12 and a medium-position oil return electromagnetic valve 13, the low oil return point position is connected with a third oil return branch, the third oil return branch is connected with a low-position oil return stop valve 14 and a low-position oil return electromagnetic valve 15, the first oil return branch, the second oil return branch and the second oil return branch are mutually connected in parallel and are converged in a second oil return pipeline 22, the second oil return pipeline 22 is connected with a first oil return stop valve 16, the second oil return pipeline 22 is connected with a first liquid inlet pipeline of a plate exchanger 17, and a first air outlet of the plate exchanger 17 is connected with an air return port pipeline of the compressor 2; the second liquid inlet and the second liquid outlet of the plate exchanger 17 are communicated with the liquid outlet pipeline of the condenser 4.
In this embodiment, three oil return points are added in the low-pressure circulation barrel, oil can be returned at the liquid level rich layer at different liquid level heights, the efficiency of the system is reduced as much as possible, and meanwhile, in the oil return process, in order to avoid the phenomenon that lubricating oil and liquid refrigerant directly return to the compressor 2 to cause liquid impact, a plate exchanger 17 is added in the system, and the liquid refrigerant in the oil return mixture is gasified by using the high-temperature refrigerant from the condenser 4, so as to protect the compressor 2.
The low-pressure circulation barrel 1 is also connected with a plurality of groups of evaporation heat exchange circulation systems, so that mutual backup and redundancy can be realized in the system, and the safety of the system is improved. Each group of evaporation heat exchange circulation system comprises a fluorine pump 18 and a tail end evaporator 19, wherein a liquid inlet of the fluorine pump 18 is communicated with a liquid outlet pipeline at the bottom end of the low-pressure circulation barrel 1, a liquid outlet of the fluorine pump 18 is communicated with a liquid inlet pipeline of the tail end evaporator 19, and a liquid outlet of the tail end evaporator 19 is communicated with a second liquid inlet pipeline of the low-pressure circulation barrel 1, so that a novel barrel pump multi-connection circulation mode is formed between the low-pressure circulation barrel 1 and the fluorine pump 19.
In this embodiment, the evaporating heat exchange circulation system is used for conveying the low-temperature low-pressure liquid refrigerant to each end evaporator in a multi-connection mode through the fluorine pump 18, and the end evaporator 19 is a back plate, an overhead heat exchange end, a return air cooler, an inter-column heat exchanger, a wind wall, a unit machine or a chip cold plate type. In practice, the number of the end evaporators 19 is plural and are connected in parallel with each other. The end evaporator 19 absorbs heat in a room, the liquid refrigerant is gasified or partially gasified and returns to the low-pressure circulation barrel 1, the refrigerant conveyed by the fluorine pump 18 can be in single circulation or multiple circulation, if the installation condition of the system is convenient, the evaporator is lower than a unit, the fluorine pump can be omitted in the system, and the liquid supply can be carried out only by using gravity.
In addition, in the present embodiment, a third oil return line 23 is connected to the liquid outlet line of each fluorine pump 18, a second oil return shutoff valve 20 is connected to the third oil return line 23, and the end of the third oil return line 23 communicates with the second oil return line 22.
The low-pressure circulation barrel 1 is internally provided with a liquid level meter 21 for detecting the liquid level change in the barrel in real time and controlling the opening and closing of the electromagnetic valves of oil return points with different heights so as to achieve accurate oil return.
The liquid outlet of the low-pressure circulation barrel 1 is added with a spoiler which is not shown in the figure. The spoiler can prevent the fluorine pump from forming vortex on the liquid surface when absorbing liquid, and brings in gaseous refrigerant, thereby causing cavitation of the fluorine pump, causing abnormal sound and shaking of the fluorine pump, causing failure of the fluorine pump and failure of the system.
In summary, the refrigerating system with the low-pressure circulation barrel designed by the utility model has two operation modes of mechanical circulation refrigeration and natural circulation refrigeration, and operates under the control of the control system, thereby meeting the requirements of the refrigerating conditions in temperature environments in different seasons, improving the efficiency of the refrigerating circulation of the machine room in industries such as a data center, and the like, utilizing natural cold sources to the maximum extent, and obviously improving the energy-saving effect. Meanwhile, the oil return system of the low-pressure circulating barrel is innovatively designed, so that efficient oil return in an oil-rich layer is guaranteed, and meanwhile, the liquid refrigerant in lubricating oil is gasified through plate replacement, so that a compressor can be effectively protected, and the service life is prolonged.
The utility model is suitable for a plurality of scenes such as a data center, an IDC machine room, energy storage and the like, and has the main purposes of effectively protecting a compressor by adding lubricating oil in a refrigerating system, providing an oil return device with different liquid levels in a low-pressure circulation barrel and an oil return device in a multi-end evaporator system based on oil return of the compressor so as to ensure the operation safety of the compressor; secondly, each circulation system is miniaturized by utilizing the circulation principle of a barrel pump, and mutual backup is realized among a plurality of groups of evaporators, so that the redundancy of the system is increased, and the safety is improved. The system is composed of a compression refrigeration cycle system and a plurality of groups of evaporation heat exchange cycle systems, wherein the low-pressure circulation barrel 1 is a bridge between the two systems, and in the part, the heat transfer function is completed and the liquid storage function is realized.
The above examples are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the present utility model.
Claims (7)
1. A refrigerating system with a low-pressure circulation barrel is characterized by comprising the low-pressure circulation barrel (1), a compressor (2), oil (3), a condenser (4) and an electronic expansion valve (5), wherein a first air return port of the low-pressure circulation barrel (1) is communicated with an air suction port pipeline of the compressor (2), an air exhaust port of the compressor (2) is communicated with an air inlet pipeline of the oil (3), a first air outlet of the oil (3) is communicated with an air inlet pipeline of the condenser (4), a liquid outlet of the condenser (4) is communicated with a liquid inlet pipeline of the electronic expansion valve (5), and the electronic expansion valve (5) is communicated with a first liquid inlet pipeline of the low-pressure circulation barrel (1) to form a refrigerating cycle;
the low-pressure circulating barrel also comprises a first electric valve (6) and a second electric valve (7), wherein the first electric valve (6) is connected with the compressor (2) and the oil (3) in parallel, an air inlet of the first electric valve (6) is communicated with a first air return pipeline of the low-pressure circulating barrel (1), and an air outlet of the first electric valve (6) is communicated with an air inlet pipeline of the condenser (4); the second electric valve (7) is connected in parallel with the electronic expansion valve (5), a liquid inlet of the second electric valve (7) is communicated with a liquid outlet pipeline of the condenser (4), and a liquid outlet of the second electric valve (7) is communicated with a first liquid inlet pipeline of the low-pressure circulation barrel (1);
a first oil return pipeline (8) is connected between the oil return port of the oil component (3) and the compressor (2), and the first oil return pipeline is connected with an oil return electromagnetic valve (9) for returning lubricating oil separated from the oil component to the compressor (2);
the low-pressure circulating barrel (1) is internally provided with a high oil return point position, a medium oil return point position and a low oil return point position, the high oil return point position is connected with a first oil return branch, and the first oil return branch is connected with a high-position oil return stop valve (10) and a high-position oil return electromagnetic valve (11); the middle oil return point is connected with a second oil return branch, and the second oil return branch is connected with a middle oil return stop valve (12) and a middle oil return electromagnetic valve (13); the low oil return point is connected with a third oil return branch, and the third oil return branch is connected with a low-position oil return stop valve (14) and a low-position oil return electromagnetic valve (15); the first oil return branch, the second oil return branch and the second oil return branch are mutually connected in parallel and are converged on a second oil return pipeline (22), a first oil return stop valve (16) is connected to the second oil return pipeline (22), the second oil return pipeline (22) is connected with a first liquid inlet pipeline of the plate exchanger (17), and a first air outlet of the plate exchanger (17) is connected with an air suction port pipeline of the compressor (2); and a second liquid inlet and a second liquid outlet of the plate exchanger (17) are communicated with a liquid outlet pipeline of the condenser (4).
2. The refrigeration system with the low-pressure circulation barrel according to claim 1, wherein the low-pressure circulation barrel (1) is further connected with a plurality of groups of evaporation heat exchange circulation systems, each group of evaporation heat exchange circulation systems comprises a fluorine pump (18) and a tail end evaporator (19), a liquid inlet of the fluorine pump (18) is communicated with a liquid outlet pipeline at the bottom end of the low-pressure circulation barrel (1), a liquid outlet of the fluorine pump (18) is communicated with a liquid inlet pipeline of the tail end evaporator (19), and a liquid outlet of the tail end evaporator (19) is communicated with a second liquid inlet pipeline of the low-pressure circulation barrel (1).
3. Refrigeration system with low-pressure circulation tank according to claim 2, characterized in that the outlet line of each fluorine pump (18) is connected with a third return line (23), on which third return line (23) a second return shut-off valve (20) is connected, the end of the third return line (23) being in communication with a second return line (22).
4. A refrigeration system with a low pressure circulation tank according to claim 3, characterized in that a level gauge (21) is provided in the low pressure circulation tank (1) for detecting a change in the tank level.
5. The refrigeration system with low-pressure circulation tank according to claim 4, characterized in that the liquid outlet of the low-pressure circulation tank (1) is added with a spoiler.
6. Refrigeration system with low-pressure circulation tank according to claim 5, characterized in that the number of end evaporators (19) is plural and mutually parallel.
7. A refrigeration system with low pressure circulation tank according to claim 6, characterized in that said compressor (2) is one or more, said compressor (2) being selected from one or more of a scroll compressor, a screw compressor or a centrifugal compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223507321.XU CN219368026U (en) | 2022-12-28 | 2022-12-28 | Refrigerating system with low-pressure circulation barrel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223507321.XU CN219368026U (en) | 2022-12-28 | 2022-12-28 | Refrigerating system with low-pressure circulation barrel |
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| Publication Number | Publication Date |
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| CN219368026U true CN219368026U (en) | 2023-07-18 |
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| CN202223507321.XU Active CN219368026U (en) | 2022-12-28 | 2022-12-28 | Refrigerating system with low-pressure circulation barrel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116123745A (en) * | 2022-12-28 | 2023-05-16 | 山东联信能源科技有限公司 | Refrigerating system with low-pressure circulation barrel |
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2022
- 2022-12-28 CN CN202223507321.XU patent/CN219368026U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116123745A (en) * | 2022-12-28 | 2023-05-16 | 山东联信能源科技有限公司 | Refrigerating system with low-pressure circulation barrel |
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