CN215724252U - Double-head screw rod parallel air-cooled compression condensing unit - Google Patents
Double-head screw rod parallel air-cooled compression condensing unit Download PDFInfo
- Publication number
- CN215724252U CN215724252U CN202120522115.2U CN202120522115U CN215724252U CN 215724252 U CN215724252 U CN 215724252U CN 202120522115 U CN202120522115 U CN 202120522115U CN 215724252 U CN215724252 U CN 215724252U
- Authority
- CN
- China
- Prior art keywords
- outlet
- inlet
- compressor
- stop valve
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
A double-head screw rod parallel air-cooled compression condensing unit belongs to the field of refrigeration cycle. The unit adopts the form that two screw compressors are connected in parallel, and can be used for refrigerating by only one compressor or simultaneously starting the two compressors. When one compressor breaks down or needs to be overhauled, the other compressor can still work, so that the risk of shutdown of main equipment caused by the fact that refrigeration equipment cannot be used is avoided, the starting current load is reduced, multi-section capacity control is achieved, the two compressors can alternately run according to load change, the water chilling unit has reasonable running time ratio, and the effect of prolonging the service life of the unit is achieved. In addition, in the utility model, a series of resource consumption and system faults caused by overhigh exhaust temperature of the compressor are considered, and the low-temperature refrigerant in the liquid storage device is divided into two branches to be connected into the two compressors so as to reduce the exhaust temperature of the compressors, thereby effectively avoiding the series of problems and reducing the fault rate of the system.
Description
Technical Field
The utility model relates to a double-head screw rod parallel air-cooled compression condensing unit, belonging to the field of refrigeration cycle.
Background
Along with the rapid development of the cold chain logistics industry in China, the refrigerating and cold storage requirements are more and more extensive, and the refrigerating compression condensing unit is more and more applied to refrigerating equipment in each link of the cold chain industry. The refrigeration compression condensing unit is divided into an air-cooled condensing unit and a water-cooled condensing unit according to a cooling medium. The water-cooled condensing unit is generally directly provided with a cooling water system consisting of a cooling tower, a cooling water pump, a cooling water pipe system and the like to cool and circulate the cooling water in the actual use process, so that the power consumption is high, and the operation cost is increased.
Traditional compression condensing unit is mostly single aircraft nose, breaks down or when needing to overhaul when the compressor, and refrigeration plant can't use, and the main equipment must be shut down, can influence the refrigeration effect, causes the waste of resource. Like patent CN207501473U refrigeration compression condensing unit, adopt two sets of heat exchangers, can realize better refrigeration effect, nevertheless this system compressor only has one, the risk that main equipment must shut down when can not avoiding the compressor maintenance, and equipment shut down leads to energy consumption great, and the unit life-span also can reduce.
In addition, the suction temperature in the system increases, and the condensation temperature increases, which results in an increase in the compressor discharge temperature. The exhaust temperature of the compressor is too high, so that the consumption of lubricating oil of the compressor is increased, the oil is thinned, and the lubrication is influenced; when the exhaust temperature is close to the flash point of the lubricating oil, part of the lubricating oil is carbonized and accumulated at the valve ports of the suction valve and the exhaust valve, and the sealing performance of the valve is influenced. For example, patent CN203719220U discloses a condensing unit, which adopts a horizontal structure to make the overall structure of the condensing unit more compact and beautiful, but does not consider the problem of too high exhaust temperature of the compressor, and has a high system failure rate.
Based on the problems, the utility model discloses a double-head screw rod parallel air-cooled compression condensing unit. The unit adopts the form that two screw compressors are connected in parallel, and can be used for refrigerating by only one compressor or simultaneously starting the two compressors. When one compressor breaks down or needs to be overhauled, the other compressor can still work, so that the risk of shutdown of main equipment caused by the fact that refrigeration equipment cannot be used can be avoided, in addition, the double-head screw compressor has the advantages that the starting current load is reduced and the multi-segment capacity is controlled, the two compressors can alternately run according to load change, the water chilling unit has a reasonable running time ratio, and the effect of prolonging the service life of the unit is achieved. In addition, in the utility model, a series of resource consumption and system faults caused by overhigh exhaust temperature of the compressor are considered, and the low-temperature refrigerant in the liquid storage device is divided into two branches to be connected into the two compressors so as to reduce the exhaust temperature of the compressors, thereby effectively avoiding the series of problems and reducing the fault rate of the system.
Disclosure of Invention
The utility model provides a double-head screw rod parallel air-cooled compression condensing unit which mainly comprises an air return flange 1, a low-pressure gauge 2, a first stop valve 3, a first air suction filter 4, a first compressor 5, a first high-low pressure controller 6, a high-pressure gauge 7, a second stop valve 8, a second air suction filter 9, a second compressor 10, a second high-low pressure controller 11, a first electromagnetic valve 12, a third stop valve 13, a second electromagnetic valve 14, a fourth stop valve 15, a fifth stop valve 16, an oil sight glass 17, an oil filter 18, a sixth stop valve 19, an oil pressure difference controller 20, an oil separator 21, a check valve 22, a fin condenser 23, an axial flow fan 24, a seventh stop valve 25, a safety valve 26, a liquid storage 27, an eighth stop valve 28, a filter 29, a ninth stop valve 30, a third electromagnetic valve 31, a tenth stop valve 32, a fourth electromagnetic valve 33, an eleventh stop valve 34, a, A liquid supply stop valve 35;
the first compressor 5 is provided with two inlets and an outlet, the two inlets respectively correspond to the outlets of the first gas absorption filter 4 and the third electromagnetic valve 31, and the outlet is connected with the inlet of the oil separator 21; the second compressor 10 has two inlets and one outlet, the two inlets correspond to the outlets of the second suction filter 9 and the fourth electromagnetic valve 33 respectively, and the outlet is connected with the inlet of the oil separator 21; the oil separator 21 has an inlet connected to the outlets of the first and second compressors 5 and 10, an outlet connected to the inlet of the finned condenser 23, and an outlet connected to the inlets of the first and second compressors 5 and 10;
the air return flange 1 is connected with an inlet of a low-pressure meter 2, an outlet of the low-pressure meter 2 is divided into two branches, a first branch is connected with an inlet of a first stop valve 3, a second branch is connected with an inlet of a second stop valve 8, an outlet of the first stop valve 3 is connected with an inlet of a first air suction filter 4, an outlet of the first air suction filter 4 is connected with a first inlet of a first compressor 5, an inlet of a first high-low pressure controller 6 is connected with a first inlet pipe section of the first compressor 5, an outlet of the first high-low pressure controller 6 is connected with an outlet pipe section of the first compressor 5, an outlet of the first compressor 5 is connected with an inlet of an oil separator 21, and a high-pressure meter 7 is connected with an outlet pipe section of the first compressor 5;
a second outlet of the oil separator 21 is connected with an inlet of a sixth stop valve 19, an outlet of the sixth stop valve 19 is connected with an inlet of an oil filter 18, an outlet of the oil filter 18 is connected with an inlet of an oil sight glass 17, an outlet of the oil sight glass 17 is connected with an inlet of a fifth stop valve 16, an inlet of an oil pressure difference controller 20 is connected with the sixth stop valve 19, an outlet of the oil pressure difference controller 20 is connected with the fifth stop valve 16, an outlet of the fifth stop valve 16 is divided into two branches, a first branch is connected with an inlet of a third stop valve 13, a second branch is connected with an inlet of a fourth stop valve 15, an outlet of the third stop valve 13 is connected with an inlet of a first electromagnetic valve 12, an outlet of the first electromagnetic valve 12 is connected with a first inlet of a first compressor 5, an outlet of the fourth stop valve 15 is connected with an inlet of a second electromagnetic valve 14, and an outlet of the second electromagnetic valve 14 is connected with a first inlet of a second compressor 10;
a first outlet of the oil separator 21 is connected to an inlet of a check valve 22, an outlet of the check valve 22 is connected to an inlet of a finned condenser 23, an axial flow fan 24 is installed on the finned condenser 23, an outlet of the finned condenser 23 is connected to an inlet of a seventh stop valve 25, an outlet of the seventh stop valve 25 is connected to an inlet of a reservoir 27, a safety valve 26 is installed above the reservoir 27, an outlet of the reservoir 27 is connected to an inlet of an eighth stop valve 28, an outlet of the eighth stop valve 28 is connected to an inlet of a filter 29, an outlet of the filter 29 is connected to an inlet of a ninth stop valve 30, an outlet pipe section of the ninth stop valve 30 is connected to two branches, a first branch is connected to an inlet of a tenth stop valve 32, an outlet of the tenth stop valve 32 is connected to an inlet of a third solenoid valve 31, an outlet of the third solenoid valve 31 is connected to a second inlet of the first compressor 5, a second branch is connected to an inlet of an eleventh stop valve 34, an outlet of the eleventh stop valve 34 is connected with an inlet of the fourth electromagnetic valve 33, an outlet of the fourth electromagnetic valve 33 is connected with a second inlet of the second compressor 10, and an outlet pipe section of the ninth stop valve 30 is connected with a liquid supply stop valve 35;
the refrigerant type in the thermodynamic cycle system of the unit is R407C;
the oil separator 21 has two inlets and two outlets, the first outlet is a refrigerant, the fin condenser 23 is connected for continuous circulation, the second outlet is refrigeration lubricating oil, the first compressor 5 and the second compressor 10 are connected, the oil separator 21 separates the lubricating oil in the high-pressure steam discharged by the first compressor 5 and the second compressor 10, so that resources are saved, and the safe and efficient operation of the device is ensured;
the unit adopts a parallel connection mode of a first compressor 5 and a second compressor 10, and can be used for refrigerating by one compressor or simultaneously starting the two compressors;
combining the fin condenser 23 with the axial flow fan 24, and performing forced air cooling on heat exchange;
the refrigerant at the outlet of the accumulator 27 is branched and connected with the first compressor 5 and the second compressor 10 respectively, so as to reduce the discharge temperature of the first compressor 5 and the second compressor 10.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Reference designations in FIG. 1: 1. the air return system comprises an air return flange, 2, a low pressure meter, 3, a first stop valve, 4, a first air suction filter, 5, a first compressor, 6, a first high-low pressure controller, 7, the high pressure meter, 8, a second stop valve, 9, a second air suction filter, 10, a second compressor, 11, a second high-low pressure controller, 12, a first electromagnetic valve, 13, a third stop valve, 14, a second electromagnetic valve, 15, a fourth stop valve, 16, a fifth stop valve, 17, an oil sight glass, 18, an oil filter, 19, a sixth stop valve, 20, an oil pressure difference controller, 21, an oil separator, 22, a check valve, 23, a fin condenser, 24, an axial flow fan, 25, a seventh stop valve, 26, 27, a reservoir, 28, an eighth stop valve, 29, a filter, 30, a ninth stop valve, 31, a third electromagnetic valve, 32, a tenth stop valve, 33, a fourth stop valve, a third stop valve, a fourth stop valve, a sixth stop valve, a fourth stop valve, a sixth stop valve, a fourth valve, a sixth valve, a fourth stop valve, a sixth valve, a fourth valve, a sixth valve, a fourth valve, a sixth valve, a, 34. Eleventh stop valve, 35 supply liquid stop valve.
Detailed Description
As shown in figure 1, the double-head screw parallel air-cooled compression condensing unit mainly comprises an air return flange 1, a low-pressure gauge 2, a first stop valve 3, a first air suction filter 4, a first compressor 5, a first high-low pressure controller 6, a high-pressure gauge 7, a second stop valve 8, a second air suction filter 9, a second compressor 10, a second high-low pressure controller 11, a first electromagnetic valve 12, a third stop valve 13, a second electromagnetic valve 14, a fourth stop valve 15, a fifth stop valve 16, an oil sight glass 17, an oil filter 18, a sixth stop valve 19, an oil pressure difference controller 20, an oil separator 21, a check valve 22, a finned condenser 23, an axial flow fan 24, a seventh stop valve 25, a safety valve 26, a liquid reservoir 27, an eighth stop valve 28, a filter 29, a ninth stop valve 30, a third electromagnetic valve 31, a tenth stop valve 32, a fourth electromagnetic valve 33, an eleventh stop valve 34, a tenth stop valve 31, a high-pressure gauge 2, a first electromagnetic valve 12, a third stop valve 13, a second stop valve, a third stop valve, a fourth valve, a, A liquid supply shutoff valve 35.
The refrigerant of the system adopts R407C, when the condensing compressor set starts to operate, the high-temperature low-pressure gaseous refrigerant passes through the air return flange 1 and the low-pressure gauge 2 and then is divided into two branches which are respectively communicated with the first compressor 5 and the second compressor 10, the first branch high-temperature low-pressure gaseous refrigerant enters the first compressor 5 after passing through the first stop valve 3 and the first air suction filter 4 and then is changed into high-temperature high-pressure gaseous refrigerant, the second branch high-temperature low-pressure gaseous refrigerant enters the second compressor 10 after passing through the second stop valve 8 and the second air suction filter 8 and then is changed into high-temperature high-pressure gaseous refrigerant, the first branch high-temperature high-pressure gaseous refrigerant passes through the high-pressure gauge 7 and then is combined with the high-temperature high-pressure gaseous refrigerant of the second branch into the oil separator 21, the oil separator 21 separates the lubricating oil in the high-pressure steam discharged by the first compressor 5 and the second compressor 10, and the second outlet of the oil separator 21 is lubricating oil, the refrigerant passes through an oil filter 18 and then is divided into two branches, and the two branches respectively enter a first compressor 5 and a second compressor 10 so as to save resources and ensure the safe and efficient operation of the device, and a first outlet of an oil separator 21 is a high-temperature and high-pressure gaseous refrigerant and enters a fin condenser 23 after passing through a check valve 22;
the high-temperature high-pressure gaseous refrigerant is changed into a low-temperature high-pressure liquid refrigerant after being forced and air-cooled by the axial flow fan 24 in the finned condenser 23, the low-temperature high-pressure liquid refrigerant passes through the seventh stop valve 25 and then is connected to the liquid storage device 27, the low-temperature high-pressure liquid refrigerant at the outlet of the liquid storage device 27 is divided into two branches after passing through the filter 29 and then is respectively connected with the first compressor 5 and the second compressor 10 so as to reduce the exhaust temperature of the first compressor 5 and the second compressor (10), and the rest part of the low-temperature high-pressure liquid refrigerant passes through the liquid supply stop valve 35 and then is connected to the outside of the unit.
The compression condensing unit adopts a parallel connection form of two screw compressors, and can be used for refrigerating by one compressor or simultaneously starting the two compressors. When one compressor breaks down or needs to be overhauled, the other compressor can still work, so that the risk of shutdown of main equipment caused by the fact that refrigeration equipment cannot be used can be avoided, and the double-head screw compressor has the advantages of reducing starting current load and controlling multi-section capacity. The two compressors can alternately run according to load change, so that the water chilling unit has reasonable running time ratio, and the effect of prolonging the service life of the unit is achieved. The exhaust temperature of the compressor is too high, so that the consumption of lubricating oil of the compressor is increased, the oil is thinned, and the lubrication is influenced; when the exhaust temperature is close to the flash point of the lubricating oil, part of the lubricating oil is carbonized and accumulated at the valve ports of the suction valve and the exhaust valve, the sealing performance of the valve is influenced, the low-temperature refrigerant in the liquid storage device is divided into two branches to be connected into the two compressors, the exhaust temperature of the compressors is reduced, and the problems can be effectively avoided.
Claims (6)
1. The utility model provides a two head screw rod wind-cooling compression condensing units that connect in parallel which characterized by:
comprises an air return flange (1), a low pressure meter (2), a first stop valve (3), a first air suction filter (4), a first compressor (5), a first high-low pressure controller (6), a high pressure meter (7), a second stop valve (8), a second air suction filter (9), a second compressor (10), a second high-low pressure controller (11), a first electromagnetic valve (12), a third stop valve (13), a second electromagnetic valve (14), a fourth stop valve (15), a fifth stop valve (16), an oil sight glass (17), an oil filter (18), a sixth stop valve (19), an oil pressure difference controller (20), an oil separator (21), a check valve (22), a fin condenser (23), an axial flow fan (24), a seventh stop valve (25), a safety valve (26), a liquid storage device (27), an eighth stop valve (28), a filter (29), a ninth stop valve (30), A third electromagnetic valve (31), a tenth stop valve (32), a fourth electromagnetic valve (33), an eleventh stop valve (34) and a liquid supply stop valve (35);
the first compressor (5) is provided with two inlets and an outlet, the two inlets respectively correspond to the outlets of the first gas absorption filter (4) and the third electromagnetic valve (31), and the outlet is connected with the inlet of the oil separator (21); the second compressor (10) is provided with two inlets and an outlet, the two inlets respectively correspond to the outlets of the second suction filter (9) and the fourth electromagnetic valve (33), and the outlet is connected with the inlet of the oil separator (21); the oil separator (21) is provided with an inlet and two outlets, the inlet is connected with the outlets of the first compressor (5) and the second compressor (10), one outlet is connected with the inlet of the finned condenser (23), and the other outlet is connected with the inlets of the first compressor (5) and the second compressor (10);
the air return flange (1) is connected with an inlet of the low-pressure meter (2), an outlet of the low-pressure meter (2) is divided into two branches, a first branch is connected with an inlet of a first stop valve (3), a second branch is connected with an inlet of a second stop valve (8), an outlet of the first stop valve (3) is connected with an inlet of a first air suction filter (4), an outlet of the first air suction filter (4) is connected with a first inlet of a first compressor (5), an inlet of a first high-low pressure controller (6) is connected with a first inlet pipe section of the first compressor (5), an outlet of the first high-low pressure controller (6) is connected with an outlet pipe section of the first compressor (5), an outlet of the first compressor (5) is connected with an inlet of an oil separator (21), and the high-pressure meter (7) is connected with an outlet pipe section of the first compressor (5);
the second outlet of the oil separator (21) is connected with the inlet of a sixth stop valve (19), the outlet of the sixth stop valve (19) is connected with the inlet of an oil filter (18), the outlet of the oil filter (18) is connected with the inlet of an oil sight glass (17), the outlet of the oil sight glass (17) is connected with the inlet of a fifth stop valve (16), the inlet of an oil pressure difference controller (20) is connected with the sixth stop valve (19), the outlet of the oil pressure difference controller (20) is connected with the fifth stop valve (16), the outlet of the fifth stop valve (16) is divided into two branches, the first branch is connected with the inlet of a third stop valve (13), the second branch is connected with the inlet of a fourth stop valve (15), the outlet of the third stop valve (13) is connected with the inlet of a first electromagnetic valve (12), the outlet of the first electromagnetic valve (12) is connected with the first inlet of a first compressor (5), and the outlet of the fourth stop valve (15) is connected with the inlet of a second electromagnetic valve (14), the outlet of the second electromagnetic valve (14) is connected with the first inlet of the second compressor (10);
the first outlet of the oil separator (21) is connected with the inlet of a check valve (22), the outlet of the check valve (22) is connected with the inlet of a fin condenser (23), an axial flow fan (24) is installed on the fin condenser (23), the outlet of the fin condenser (23) is connected with the inlet of a seventh stop valve (25), the outlet of the seventh stop valve (25) is connected with the inlet of a liquid storage device (27), a safety valve (26) is installed on the liquid storage device (27), the outlet of the liquid storage device (27) is connected with the inlet of an eighth stop valve (28), the outlet of the eighth stop valve (28) is connected with the inlet of a filter (29), the outlet of the filter (29) is connected with the inlet of a ninth stop valve (30), the outlet pipe section of the ninth stop valve (30) is connected with two branches, the first branch is connected with the inlet of a tenth stop valve (32), and the outlet of the tenth stop valve (32) is connected with the inlet of a third electromagnetic valve (31), the outlet of the third electromagnetic valve (31) is connected with the second inlet of the first compressor (5), the second branch is connected with the inlet of an eleventh stop valve (34), the outlet of the eleventh stop valve (34) is connected with the inlet of a fourth electromagnetic valve (33), the outlet of the fourth electromagnetic valve (33) is connected with the second inlet of the second compressor (10), and the outlet pipe section of the ninth stop valve (30) is connected with a liquid supply stop valve (35).
2. The double-head screw rod parallel air-cooled compression condensing unit of claim 1, which is characterized in that:
the refrigerant type in the thermodynamic cycle system of the unit is R407C.
3. The double-head screw rod parallel air-cooled compression condensing unit of claim 1, which is characterized in that:
the oil separator (21) is provided with an inlet and two outlets, the first outlet is used for refrigerant, the fin condenser (23) is connected for continuous circulation, the second outlet is used for freezing lubricating oil, the first compressor (5) and the second compressor (10) are connected, and the oil separator (21) separates the lubricating oil in high-pressure steam discharged by the first compressor (5) and the second compressor (10) so as to save resources and ensure that the device can safely and efficiently operate.
4. The double-head screw rod parallel air-cooled compression condensing unit of claim 1, which is characterized in that:
the unit adopts the parallel connection form of two screw compressors of a first compressor (5) and a second compressor (10), and can be used for refrigerating by one compressor or simultaneously starting the two compressors.
5. The double-head screw rod parallel air-cooled compression condensing unit of claim 1, which is characterized in that:
the fin condenser (23) is combined with an axial flow fan (24), and forced air cooling is adopted for heat exchange.
6. The double-head screw rod parallel air-cooled compression condensing unit of claim 1, which is characterized in that:
refrigerant at the outlet of the liquid storage device (27) is divided into two branches which are respectively connected with the first compressor (5) and the second compressor (10) so as to reduce the exhaust temperature of the first compressor (5) and the second compressor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120522115.2U CN215724252U (en) | 2021-03-12 | 2021-03-12 | Double-head screw rod parallel air-cooled compression condensing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120522115.2U CN215724252U (en) | 2021-03-12 | 2021-03-12 | Double-head screw rod parallel air-cooled compression condensing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215724252U true CN215724252U (en) | 2022-02-01 |
Family
ID=80013026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120522115.2U Active CN215724252U (en) | 2021-03-12 | 2021-03-12 | Double-head screw rod parallel air-cooled compression condensing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215724252U (en) |
-
2021
- 2021-03-12 CN CN202120522115.2U patent/CN215724252U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107062934B (en) | Energy-saving vacuumizing cooling system and method | |
| CN105823256A (en) | Working method for air source heat pump device for compressor return oil cooling | |
| CN201014825Y (en) | Centrifugal type refrigeration unit cooling system | |
| CN111565546A (en) | Oil-free efficient refrigeration system for data center and control method thereof | |
| CN112710041A (en) | Double-pump hybrid-driven composite heat pipe energy-saving air conditioning system | |
| CN105443402A (en) | Centrifugal ammonia compressor unit with dual-cylinder compression three-section air inlet manner | |
| CN215724252U (en) | Double-head screw rod parallel air-cooled compression condensing unit | |
| CN112484351A (en) | Large-span low-temperature refrigerating system for test box | |
| CN204478368U (en) | With the free refrigeration type evaporative condenser handpiece Water Chilling Units of pressure maintenance device | |
| CN204574584U (en) | A kind of novel energy-saving cooling by wind with pressure maintenance device | |
| CN203399467U (en) | Energy-saving air-cooled compressor cooling system | |
| CN212320118U (en) | Energy-saving multi-system oil liquid cooling device | |
| CN210463660U (en) | Ultra-low temperature air source heat pump unit with parallel compressors | |
| CN205225742U (en) | Helical -lobe compressor system with organic rankine cycle | |
| CN211739528U (en) | Multi-split VRV device for machine room | |
| CN210107744U (en) | Heat pump type oil heating unit | |
| CN102435026B (en) | A kind of auxiliary device of multi-gang air-conditioner heat pump | |
| CN201983539U (en) | Low-temperature water chilling unit | |
| CN205779728U (en) | Compressor and freeze oil cooler | |
| CN203671980U (en) | Industrial air-cooled frequency-conversion parallel type water chilling unit | |
| CN110849032A (en) | Compressor waste heat driven compression-injection refrigerating system | |
| CN220748489U (en) | Heat recovery system of water-cooled air compressor | |
| CN220689418U (en) | Energy-saving and consumption-reducing cooling device of air conditioner compressor | |
| CN205505472U (en) | Freon CO2 overlapping sled piece unit formula refrigerating system | |
| CN219063798U (en) | Efficient energy-saving refrigeration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |