CN211012034U - CO2Refrigeration system - Google Patents
CO2Refrigeration system Download PDFInfo
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- CN211012034U CN211012034U CN201920827880.8U CN201920827880U CN211012034U CN 211012034 U CN211012034 U CN 211012034U CN 201920827880 U CN201920827880 U CN 201920827880U CN 211012034 U CN211012034 U CN 211012034U
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Abstract
The utility model relates to a CO2The refrigerating system comprises a low-pressure circulating barrel, a liquid supply pipeline and a first bypass pipeline, wherein the liquid pipeline is provided with a liquid CO pump for pumping liquid CO in the low-pressure circulating barrel2One end of the first bypass pipeline is connected with the low-pressure circulating barrel, and the other end of the first bypass pipeline is connected with the liquid supply pipeline. When CO is present2When the refrigerating system is stopped or power is cut off, the first bypass pipelineFor guiding the refrigerant staying in the pipe to flow back into the low-pressure circulation tank, preventing the pressure in the pipe from exceeding the design pressure, and simultaneously, when CO is generated2When the refrigerating system needs less refrigerant or does not need refrigerant, a circulation loop is formed to ensure that a certain amount of refrigerant flows through the shield pump, prevent the motor of the shield pump from overheating and ensure CO2The refrigeration system operates safely and reliably.
Description
Technical Field
The utility model relates to a refrigerating system especially relates to CO2A refrigeration system.
Background
CO2As a natural refrigerant, the refrigerant has the characteristics of high density and low viscosity, small flow loss, good heat transfer effect and CO2Excellent environmental performance, low cost, easy acquisition, good stability, contribution to reducing the volume of the device, and most importantly, CO2Safe, nontoxic and nonflammable. The conventional refrigerant freon is gradually being eliminated due to its environmental unfriendliness, CO2As a safe, environment-friendly and pollution-free natural working medium, the higher the call in the industry is, the higher the CO content in recent years is2As refrigerant, gradually applied to CO2Combined cooling and heating system and super commercial CO2Refrigerating system and large-scale freezer system, such as commodity circulation storehouse, slaughter storehouse, aquatic products quick-freeze etc..
But using CO2There are also correspondingly high demands as refrigerants, whether in subcritical or transcritical cycle, CO2The operating pressure of the refrigeration system is higher than that of the traditional refrigeration air-conditioning system. When the system is deactivated or suddenly powered off, the refrigerant pressure at the low-pressure end rises back, causing the pressure in a portion of the tubing to exceed the design pressure, causing a burst in a portion of the fitting and tubing. In the pump liquid supply system, the pump runs for a long time under the condition of small flow, the efficiency is low, heat is generated, the pump is damaged, and the system cannot run normally. Thus, with CO2When the refrigerant is used as a refrigeration working medium, corresponding guarantee measures are required to maintain the safe, stable and reliable operation of the system.
SUMMERY OF THE UTILITY MODEL
To solve CO2The problem that the motor of high pressure and canned motor pump burns out among refrigerating system, the utility model provides a CO2The technical scheme of the refrigerating system is as follows:
CO (carbon monoxide)2Refrigerating system, including low pressure circulation bucket and liquid supply pipeline, the liquid supply pipeline is equipped with canned motor pump, canned motor pump is used for the extraction liquid CO in the low pressure circulation bucket2And bringing liquid CO2Flows into the liquid supply pipeline for liquid supply; the CO is2The refrigeration system also comprises a first bypass pipeline, one end of the first bypass pipeline is connected with the low-pressure circulating barrel, and the other end of the first bypass pipeline is connected with the liquid supply pipeline; the first bypass pipeline, the low-pressure circulating barrel and the liquid supply pipeline form liquid CO2A circulation loop for guiding liquid CO retained in the liquid supply line2Flowing back into the low-pressure circulation barrel to prevent the pressure in the pipeline from exceeding the design pressure and ensure that the liquid CO is in a liquid state2The refrigerant can circularly flow through the canned motor pump, so that a certain amount of refrigerant in the canned motor pump can flow through the canned motor pump, and the motor of the canned motor pump is prevented from overheating.
In one embodiment, at least two first cut-off valves are arranged on the first bypass pipeline, and the at least two first cut-off valves are arranged on the first bypass pipeline at intervals; when the first bypass pipeline breaks down, the two first cutoff valves are used for cutting off the pipeline, and the first bypass pipeline is overhauled.
In one embodiment, the first bypass line is further provided with a first safety valve, the first safety valve is installed between the two first block valves, and when the pressure in the line is too high, the pressure is relieved through the first safety valve.
In one embodiment, the liquid supply pipeline further comprises a main pipe and at least one branch pipe, one end of the branch pipe is connected with the low-pressure circulating barrel, the other end of the branch pipe is connected with the main pipe, and the shield pump is arranged on the branch pipe.
In one embodiment, a non-return cut-off piece and a second cut-off valve are arranged on the branch pipe; the shielding pump is arranged between the non-return cutoff piece and the second cutoff valve; the outlet end of the non-return cut-off part is connected with the main pipe; of said second block valveThe inlet end is connected with the low-pressure circulating barrel; the non-return cut-off member can prevent liquid CO2And when the fittings in the branch pipe or in the branch pipe are in failure, the pipeline can be closed by using the non-return cutoff piece and the second cutoff valve for maintenance.
In one embodiment, the inlet end of the shield pump is provided with a filter to protect CO2The refrigerating system is protected from impurities, and the inlet end of the filter is connected with the outlet end of the second block valve.
According to CO2Different designs of the refrigerating system, the number of the branch pipes is multiple, the branch pipes are arranged on the main pipe in parallel, and the liquid CO is2Uniformly flows into each branch pipe.
In one embodiment, the CO is2The refrigerating system also comprises a second bypass pipeline, the second bypass pipeline is conducted in a two-way mode, one end of the second bypass pipeline is connected with the low-pressure circulating barrel, and the other end of the second bypass pipeline is connected with the outlet end of the shielding pump;
liquid CO when the suction inlet pressure of the canned motor pump is low2Flows out of the low-pressure circulating barrel and flows into the canned motor pump from the second bypass pipeline so as to prevent cavitation of the canned motor pump.
When CO is present2Liquid CO in the branch pipe when the refrigeration system stops running2And the first bypass pipeline and the second bypass pipeline flow back to the low-pressure circulating barrel, so that the pipelines and fittings are prevented from bursting due to high pressure.
In one embodiment, the second bypass pipeline is provided with a regulating valve, and the regulating valve is used for controlling the flow of the refrigerant flowing through the shielding pump; one end of the regulating valve is connected with the low-pressure circulating barrel.
In one embodiment, at least one third shut-off valve is further disposed in the second bypass line, an inlet end of the third shut-off valve is connected to an outlet end of the canned motor pump, and an outlet end of the third shut-off valve is connected to an inlet end of the regulating valve.
In one embodiment, a second safety valve is arranged on the low-pressure circulating barrel, and when the pressure in the low-pressure circulating barrel is too high, the pressure is relieved through the second safety valve.
In one embodiment, the first shut-off valve is a shut-off valve.
In one embodiment, the second block valve is a stop valve.
In one embodiment, the third shut-off valve is a shut-off valve.
In one embodiment, the canned motor pump is a cryogenic pump.
In one of the embodiments, the non-return shut-off is a shut-off valve with a one-way function.
In one embodiment, the regulating valve is a manual expansion valve.
Compared with the prior art, the utility model provides a pair of CO2A refrigerating system with a first bypass line for CO2When the refrigeration system stops running or is in power failure, the pressure of the pipeline and the fittings can be relieved in time by conducting the flow through the first bypass pipeline; meanwhile, the low-pressure circulating barrel, the liquid supply pipeline and the first bypass pipeline form liquid CO2Circulating in a loop, thereby in CO2Liquid CO required by refrigeration system2When less or not needed, some liquid CO still remains in the canned motor pump2And the flow-through reduces the possibility of burning out the motor of the canned motor pump.
Drawings
FIG. 1 shows CO of the present invention2A schematic diagram of a refrigeration system.
The symbols in the drawings represent the following meanings:
1-low pressure circulation barrel; 2-a liquid supply pipeline; 3-a first bypass line; 4-a second bypass line; 10-a liquid outlet pipe; 11-a first liquid return pipe; 12-a second liquid return pipe; 13-air return pipe; 14-a gas supply tube; 15-a third liquid return pipe; 16-a second safety valve; 20-main pipe; 21-branch pipe; 210-non-return cutoff; 211-canned pump; 212-a filter; 213-second block valve; 30-a first shut-off valve; 31-a first safety valve; 40-a third block valve; 41-regulating valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Referring to FIG. 1, the present invention provides a CO2Refrigerating system, the CO2The refrigerating system is applied to a refrigeration house and is used as a liquid supply system of a medium-temperature or low-temperature pump of the refrigeration house. Of course, in other embodiments, the CO is2The refrigeration system may also be applied to CO2Combined cooling and heating system and super commercial CO2Refrigeration systems, and the like.
With continued reference to FIG. 1, the CO2The refrigerating system comprises a low-pressure circulating barrel 1, a liquid supply pipeline 2 and a first bypass pipeline 3. The low pressure circulation barrel 1 may be fixed to an external support, one end of the liquid supply line 2 is connected to the low pressure circulation barrel 1, and the other end thereofConnected to an evaporator (not shown), a canned motor pump 211 is provided on the liquid supply line 2, and the canned motor pump 211 is used for pumping liquid CO in the low-pressure circulation tank 12And is conveyed to an evaporator for heat exchange. The canned motor pump 211 is provided with a motor (not shown) and an impeller (not shown), a rotor (not shown) of the motor and the impeller (not shown) of the pump are fixed on the same bearing (not shown), when the canned motor pump 211 is operated under a low flow condition for a long time, the efficiency is low, heat generation and liquid CO can be caused2Evaporate, causing the motor to burn out.
One end of the first bypass pipeline 3 is connected with the liquid supply pipeline 2, and the other end is connected with the low-pressure circulating barrel 1. The first bypass pipeline 3, the low-pressure circulating barrel 1 and the liquid supply pipeline 2 form a liquid CO2A circulation loop, a first bypass line 3 for guiding liquid CO retained in the liquid supply line 22Flows back into the low-pressure circulating barrel 1 and leads liquid CO to be2Can circulate through the canned motor pump 211 to prevent overheating of the motor.
It can be understood that when the temperature of the refrigeration house reaches the requirement, CO2When the refrigerating system is stopped or power is cut off, liquid CO in the liquid supply pipeline 22Flows back to the low-pressure circulating barrel 1 through the first bypass pipeline 3, and the pressure of the pipeline and the fittings is relieved in time. Meanwhile, when the temperature of the refrigeration house meets the requirement, CO is added2The amount of refrigerant required by the refrigeration system is reduced, even when no refrigerant is required to flow, then the refrigerant flow in the supply line 2 is too low or no, and at this time CO2When the refrigeration system is not powered off, the canned motor pump 211 works for a long time under the condition of small flow or no flow, and the low-pressure circulating barrel 1, the liquid supply pipeline 2 and the first bypass pipeline 3 form a liquid CO2A circulation loop, thereby ensuring that there is always a certain CO in the canned motor pump2The cooling flows through, and thus, the motor of the canned motor pump 211 is prevented from being burned out.
The low-pressure circulating barrel 1 is provided with a liquid outlet pipe 10, a second liquid return pipe 12 and a gas return pipe 13. The liquid outlet pipe 10 is connected to one end of the liquid supply pipe 2 to supply CO2The refrigerating system provides required liquid CO2. The return pipe 13 is connected to the evaporator and supplies liquid CO in the liquid line 22Is evaporated by the evaporator to become wet return air, and returns to low-pressure circulation through the return air pipe 13In the tub 1. The second liquid return pipe 12 is connected with one end of the first bypass pipeline 3, and when the temperature of the refrigeration house reaches the requirement and CO is discharged2CO remaining in the feed line 2 when the refrigeration system is out of service or in the event of a power failure2Returning to the low-pressure circulating barrel 1 through the first bypass pipeline 3 and the second liquid return pipe 12, and simultaneously, liquid CO2Flows out of the liquid outlet pipe 10, passes through the shielding pump 211, passes through the first bypass pipeline 3, flows back to the low-pressure circulating barrel 1 from the second liquid return pipe 12, and flows out of the liquid outlet pipe 10 to form a circulating loop.
The low-pressure circulating barrel 1 is also provided with an air outlet pipe 14 and a third liquid return pipe 15. The outlet pipe 14 is connected to a compressor (not shown), and the third liquid return pipe 15 is connected to a throttle valve (not shown). The wet return air flowing out of the return air pipe 13 is subjected to gas-liquid separation by the low-pressure circulating barrel 1, and then gaseous CO is obtained2Flows out of the gas supply pipe 14, is compressed by a compressor, is condensed by a condenser (not shown), is throttled by a throttle valve to reduce pressure, and returns to the low-pressure circulating barrel 1 from a third liquid return pipe 15.
Further, the low-pressure circulation barrel 1 is also provided with a safety valve 16, and when the pressure in the low-pressure circulation barrel 1 is overlarge, the safety valve 16 is opened to release the pressure.
The liquid supply line 2 includes a main line 20 and a branch line 21, one end of the main line 20 is connected to the first bypass line 3 and the evaporator, and the other end is connected to the branch line 21. The canned pump 211 is provided on the branch pipe 21. In this embodiment, the supply line 2 is provided with two identical parallel branches 21, liquid CO2Liquid CO is pumped from the low-pressure circulation tank 1 through the canned pump 2112Flows out of the liquid outlet pipe 10, uniformly flows into two parallel branch pipes 21, is converged in the main pipe 20, and then flows into CO2The refrigeration system supplies liquid. Of course, in other embodiments, according to CO2The refrigerating system has different liquid supply amount and can be provided with one, two or more than two branch pipes connected in parallel.
Further, the branch pipe 21 is provided with a liquid CO preventing device2A reverse flow stopping/stopping member 210 and a second stopping valve 213. The inlet end of the second block valve 213 is connected with the liquid outlet pipe 10 of the low-pressure circulation barrel 1, the outlet end of the canned motor pump 211 is connected with the inlet end of the non-return block 210, and the non-return block 2The outlet end of 10 is connected to a main pipe 20. When a pipeline or a fitting in the branch pipe 21 is broken, the pipeline is cut off by the non-return cutoff member 210 and the second cutoff valve 213, and the inspection is performed. In this embodiment, the canned motor pump 211 is a refrigeration pump, the second block valve 213 is a stop valve, and the non-return block 210 is a stop valve having a one-way function, but in other embodiments, the canned motor pump 211 may be another pump having the same function, the second block valve 213 may be a valve element having the same function, such as a ball valve, the second block valve 213 may be two or more, and the non-return block 210 may be another valve element having the same function.
The branch pipe 21 is further provided with a filter 212, and the filter 212 can prevent impurities from affecting CO2The refrigeration system is normally operated, the inlet end of the filter 212 is connected with the outlet end of the second cut-off valve 213, and the outlet end of the filter 212 is connected with the inlet end of the canned motor pump 211.
The first bypass line 3 is provided with two first shut-off valves 30, and the two first shut-off valves 30 are installed on the first bypass line 3 at intervals. The inlet end of one of the first cut-off valves 30 is connected to the second liquid return pipe 12 of the low pressure circulation tank 1, and the outlet end of the other first cut-off valve 30 is connected to the liquid supply pipe 2. When the first bypass line 3 is out of order, the line can be shut off by using the two first shut-off valves 30 for maintenance. In this embodiment, the first shut-off valve 30 is a shut-off valve, but in other embodiments, the first shut-off valve 30 may be a valve member having the same function, such as a ball valve, and the number of the first shut-off valves 30 is two or more.
The first bypass line 3 is further provided with a first relief valve 31, wherein the outlet end of one first shut-off valve 30 is connected with the inlet end of the first relief valve, and the outlet end of the first relief valve 31 is connected with the inlet end of the other first shut-off valve 30. When the pressure in the line is too high, it is relieved by the first relief valve 31.
Please continue to refer to FIG. 1, CO2The refrigeration system further comprises a second bypass pipeline 4, and the second bypass pipeline 4 has a bidirectional communication function. The low-pressure circulating barrel 1 is also provided with a first liquid return pipe 11, one end of the second bypass pipeline 4 is connected with the first liquid return pipe 11, and the other end is connected with the shielding pump 2The outlet ends of 11 are connected. Liquid CO when the suction inlet pressure of the canned motor pump 211 is low2Flows out of the first return pipe 11 of the low-pressure circulation tank 1 and flows into the canned pump 211 through the second bypass line 4. When CO is present2Liquid CO remaining in branch 21 when the refrigeration system is stopped2Through the second bypass line 4, and then into the first liquid return pipe 11, and flows back to the low-pressure circulation barrel 1.
Two third cut-off valves 40 are arranged on the second bypass pipeline 4, wherein the inlet end of one third cut-off valve 40 is connected with the outlet end of the canned motor pump 211, the outlet ends of the two third cut-off valves 40 are connected, and when the pressure at the impeller inlet of the canned motor pump 211 is less than or equal to the liquid CO2At saturated vapor pressure of (2), liquid CO2The gas is gasified to form bubbles and cavitation occurs. The bypass line 4 is connected to the outlet of the canned motor pump 211 to prevent cavitation of the canned motor pump 211.
In this embodiment, the third blocking valves 40 are blocking valves, the third blocking valves 40 may be valve elements having the same function, such as ball valves, and the number of the third blocking valves 40 may be two or more.
Furthermore, the second bypass line 4 is further provided with a regulating valve 41, the outlet ends of the two third block valves 40 are simultaneously connected with the inlet end of the regulating valve 41, and the outlet end of the regulating valve 41 is connected with the first liquid return pipe 11 of the pressure reduction circulation barrel 1. When the second bypass line 4 fails, the line can be shut off by the third shut-off valve 40 and the regulating valve 41, and the maintenance can be performed. In the present embodiment, the regulating valve 41 is a manual expansion valve and has both the shutoff function and the flow rate regulating function, but in other embodiments, the shutoff valve regulating valve 41 may also be another valve element having the shutoff and flow rate regulating functions.
In the working process, the wet return air from the evaporator returns to the low-pressure circulating barrel 1 from the second return liquid pipe 12, gas-liquid separation is carried out through the low-pressure circulating barrel 1, and separated gaseous CO is obtained2Flows to the compressor through the outlet pipe 14, and liquid CO2Stored in the bottom of the low-pressure circulating barrel 1. Gaseous CO compressed by a compressor2Condensed into liquid CO by a condenser2Then throttled and depressurized by a throttle valve, and flows back to low-pressure circulation through a second liquid return pipe 12In the ring barrel 1. Liquid CO2Then pumped by a canned motor pump 211, flows out through the liquid supply pipeline 10, passes through the branch pipes 211 connected in parallel and contains liquid CO2Join in the main pipe 20 and flow to the evaporator to meet the refrigeration requirement of the refrigeration house.
When the temperature of the refrigeration house meets the requirement, the flow of the required refrigerant is reduced, even when the refrigerant is not needed, and the liquid CO in the low-pressure circulating barrel 12Flows through the liquid outlet pipe 10, the branch pipe 21, the main pipe 20, the first bypass pipeline 3 and the second liquid return pipe 12 to the low-pressure circulating barrel 1, and liquid CO2Then flows out from the liquid outlet pipe 10 to form a circulation loop. The flow rate is adjusted by the regulating valve 41 to control the flow rate of the refrigerant flowing through the canned motor pump 211 to ensure that a certain amount of the refrigerant flows through the canned motor pump 211. Liquid CO when the pressure at the impeller inlet of the canned motor pump 211 is small2The liquid flows out from the first liquid return pipe 11 of the low-pressure circulating barrel 1 and flows into the canned pump 211, so that the canned pump 211 can be effectively prevented from generating cavitation.
When the temperature of the cold storage meets the requirement and the cold storage is stopped or power is cut off, CO at the low-pressure end2CO accumulated in the liquid supply line 2 due to the pressure rise of the refrigerant2The refrigerant flows back into the low-pressure circulating tub 1 through the first bypass line 3, and CO staying in the branch pipe 212The refrigerant flows back into the low-pressure circulation tub 1 through the second bypass line 4. When the pressure on the first bypass line is too high, the pressure is relieved by the first relief valve 13, and when the pressure in the low pressure cycle 1 is too high, the pressure is relieved by the second relief valve.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. CO (carbon monoxide)2Refrigerating system, including low pressure circulation bucket and liquid supply pipeline, the liquid supply pipeline is equipped with canned motor pump, canned motor pump is used for the extraction liquid CO in the low pressure circulation bucket2And bringing liquid CO2Flows into the liquid supply pipeline for liquid supply; the method is characterized in that:
the CO is2The refrigeration system also comprises a first bypass pipeline, one end of the first bypass pipeline is communicated with the low-pressure circulating barrel, and the other end of the first bypass pipeline is communicated with the liquid supply pipeline; the first bypass pipeline, the low-pressure circulating barrel and the liquid supply pipeline form liquid CO2A circulation loop for guiding liquid CO retained in the liquid supply line2Flowing back into the low-pressure circulating barrel and making liquid CO2Can circulate through the canned motor pump.
2. CO according to claim 12The refrigeration system is characterized in that at least two first stop valves are arranged on the first bypass pipeline, and the at least two first stop valves are installed on the first bypass pipeline at intervals.
3. CO according to claim 22The refrigerating system is characterized in that a first safety valve is further arranged on the first bypass pipeline, the first safety valve is installed between the two first stop valves, and when the pressure in the pipeline is too high, the pressure is relieved through the first safety valve.
4. CO according to claim 12The refrigeration system is characterized in that the liquid supply pipeline comprises a main pipe and at least one branch pipe, one end of the branch pipe is connected with the low-pressure circulating barrel, and the other end of the branch pipe is connected with the main pipe;
the canned motor pump is arranged on the branch pipe.
5. CO according to claim 42The refrigerating system is characterized in that the branch pipe is provided with a non-return cutoff piece and a second cutoff valve; the shielding pump is arranged between the non-return cut-off piece and the second cut-off valve, and the outlet end of the non-return cut-off piece is connected with the main pipe; and the inlet end of the second cut-off valve is connected with the low-pressure circulating barrel.
6. CO according to claim 52The refrigerating system is characterized in that a filter is arranged at the inlet end of the shielding pump, and the inlet end of the filter is connected with the outlet end of the second cut-off valve.
7. CO according to claim 42The refrigerating system is characterized in that the number of the branch pipes is multiple, the branch pipes are arranged on the main pipe in parallel, and the liquid CO is2Uniformly flows into each branch pipe.
8. CO according to claim 42Refrigeration system, characterized in that said CO2The refrigerating system also comprises a second bypass pipeline, the second bypass pipeline is conducted in a two-way mode, one end of the second bypass pipeline is connected with the low-pressure circulating barrel, and the other end of the second bypass pipeline is connected with the outlet end of the shielding pump;
liquid CO when the suction inlet pressure of the canned motor pump is low2Flows out of the low-pressure circulating barrel and flows into the shielding pump from the second bypass pipeline;
when CO is present2Liquid CO in the branch pipe when the refrigeration system stops running2Through the second bypass line back to the low pressure recycle bin.
9. CO according to claim 82The refrigerating system is characterized in that the second bypass pipeline is provided with a regulating valve, and the regulating valve is used for controlling liquid CO flowing through the shielding pump2Flow rate;one end of the regulating valve is connected with the low-pressure circulating barrel.
10. CO according to claim 92The refrigerating system is characterized in that at least one third cut-off valve is further arranged in the second bypass pipeline, the inlet end of the third cut-off valve is connected with the outlet end of the shielding pump, and the outlet end of the third cut-off valve is connected with the inlet end of the regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920827880.8U CN211012034U (en) | 2019-06-03 | 2019-06-03 | CO2Refrigeration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920827880.8U CN211012034U (en) | 2019-06-03 | 2019-06-03 | CO2Refrigeration system |
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| CN211012034U true CN211012034U (en) | 2020-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186233A (en) * | 2019-06-03 | 2019-08-30 | 浙江盾安冷链系统有限公司 | CO2Refrigeration system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186233A (en) * | 2019-06-03 | 2019-08-30 | 浙江盾安冷链系统有限公司 | CO2Refrigeration system |
| CN110186233B (en) * | 2019-06-03 | 2024-07-26 | 浙江盾安冷链系统有限公司 | CO2Refrigerating system |
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