CN203501577U - Low temperature stage liquid accumulator with cold source and in carbon dioxide cascade type refrigerating unit - Google Patents
Low temperature stage liquid accumulator with cold source and in carbon dioxide cascade type refrigerating unit Download PDFInfo
- Publication number
- CN203501577U CN203501577U CN201320642793.8U CN201320642793U CN203501577U CN 203501577 U CN203501577 U CN 203501577U CN 201320642793 U CN201320642793 U CN 201320642793U CN 203501577 U CN203501577 U CN 203501577U
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- China
- Prior art keywords
- carbon dioxide
- low temperature
- low
- temperature stage
- liquid accumulator
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- Expired - Lifetime
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 28
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 title abstract 7
- 238000005057 refrigeration Methods 0.000 claims abstract description 30
- 238000001704 evaporation Methods 0.000 claims abstract description 13
- 230000008020 evaporation Effects 0.000 claims abstract description 13
- 239000003507 refrigerant Substances 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The utility model discloses a low temperature stage liquid accumulator with a cold source and in a carbon dioxide cascade type refrigerating unit. The low temperature stage liquid accumulator is characterized in that the emergency cold source is included, an air outlet of a refrigeration compressor is sequentially connected with an air cooling condensation pipe, a dry filter, a capillary pipe and an evaporation coil, the output end of the evaporation coil is connected with an air suction port of the refrigeration compressor to form a refrigerant circulation loop, and the evaporation coil in the emergency cold source is arranged in a carbon dioxide liquid storage tank of the low temperature stage high pressure liquid accumulator. By means of the low temperature stage liquid accumulator, the pressure inside the low temperature stage liquid accumulator and the pressure inside the circulation loop can be effectively prevented from being too high under the unconventional conditions such as a main machine breakdown, and therefore the security of the refrigerating unit and related equipment is guaranteed.
Description
Technical field
The utility model relates to refrigeration low-temperature equipment, more particularly relates to a kind of carbon dioxide cascade refrigeration unit.
Background technology
Carbon dioxide is a kind of environmentally friendly natural refrigerant, there is good economy, security and the chemical stabilities such as nontoxic, non-combustible, evaporation latent heat is large, refrigerating effect per unit swept volume is large, kinematic viscosity is low, thermal conductivity factor is large, under the international background of energy-conserving and environment-protective, the developed countries such as America and Europe are wideling popularize application.Yet, CO
2critical-temperature and critical pressure high, be respectively 31.1 ℃, 7.3MPa, even its saturation pressure is also up to 6.5Mpa when 25 ℃ of normal temperature.The CO using in freezer, supermarket at present
2cascade refrigeration unit due to uninterrupted operation continuously, is not established expansion vessel, conventionally only at low temperature level CO in refrigeration unit
2safety valve is set on reservoir, and when hostdown, power failure, its closed circuit internal pressure rises, and as surpassed the unlatching threshold value of safety valve, safety valve is opened, towards periphery space drainage CO
2cold-producing medium.This dependence safety valve provides the technology of security, not only has the possibility that causes the harm such as local air pollution, but also needs charging refrigerant before can causing refrigeration unit to restart.
Utility model content
The utility model is for avoiding the existing weak point of above-mentioned prior art, a kind of good reliability is provided, be convenient to that refrigeration system starts fast and the easy to implement carbon dioxide cascade refrigeration unit that is provided with low-temperature receiver in low temperature level reservoir, with avoid carbon dioxide folding type cooling system have a power failure or the unconventional condition such as hostdown under safety issue.
The utility model is that technical solution problem adopts following technical scheme:
The design feature that the utility model is provided with low temperature level reservoir in the carbon dioxide cascade refrigeration unit of low-temperature receiver is: emergent low-temperature receiver is set, it is to connect successively air-cooled condenser pipe, device for drying and filtering, capillary and evaporation coil in the gas outlet of refrigeration compressor, and forms refrigerant circulation loop with the air entry of the output termination refrigeration compressor of evaporation coil; Evaporation coil in described emergent low-temperature receiver is arranged in the carbon dioxide fluid reservoir of low temperature level high-pressure reservoir.
The design feature that the utility model is provided with low temperature level reservoir in the carbon dioxide cascade refrigeration unit of low-temperature receiver is also:
In described emergent low-temperature receiver, be to adopt R134a cold-producing medium.
Described carbon dioxide fluid reservoir is to adopt seamless steel pipe and complete penetraction and fusion in welding butt-welded side seam technique.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the utility model is the emergent low-temperature receiver of low temperature level configuration in cascade refrigeration unit, under the unconventional conditions such as power failure, hostdown, emergent low-temperature receiver starts operation, effectively the pressure in control carbon dioxide refrigeration loop, in safe range, is protected the safety and reliability of refrigeration unit; Also significantly improved the quick startability of carbon dioxide cascade refrigeration unit simultaneously;
2, the utility model has been exempted superposition type low temperature unit and in low temperature level, has been configured necessity of large capacity expansion vessel.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Number in the figure: 1 carbon dioxide fluid reservoir, 2 refrigeration compressors, 3 air-cooled condensers, 4 devices for drying and filtering, 5 capillaries, 6 evaporator coils, 7 safety valves.
The specific embodiment
Carbon dioxide cascade refrigeration unit includes high temperature level loop and low temperature level loop, and low temperature level loop is wherein to use R744 carbon dioxide coolant, and is provided with low temperature level high-pressure reservoir, i.e. carbon dioxide fluid reservoir.
Referring to Fig. 1, emergent low-temperature receiver is set in the present embodiment, it is to connect successively air-cooled condenser pipe 3, device for drying and filtering 4, capillary 5 and evaporation coil 6 in the gas outlet of refrigeration compressor 2, and forms refrigerant circulation loop with the air entry of the output termination refrigeration compressor 2 of evaporation coil 6; Evaporation coil 6 in emergent low-temperature receiver is arranged in the carbon dioxide fluid reservoir 1 of low temperature level high-pressure reservoir, and safety valve 7 arranges routinely.
In concrete enforcement, be to adopt R134a cold-producing medium in emergent low-temperature receiver, carbon dioxide fluid reservoir is to adopt seamless steel pipe and complete penetraction and fusion in welding butt-welded side seam technique.
The utility model is that the low-temperature receiver of meeting an urgent need provides refrigeration requirement for low temperature grade carbon-dioxide fluid reservoir, controls the pressure and temperature in carbon dioxide fluid reservoir, guarantees refrigeration unit safe operation.
Emergent low-temperature receiver in the present embodiment can be used emergency power supply, and emergency power supply is battery, fuel electric generator or other external power supplys.Under the unconventional conditions such as power failure, hostdown, emergent low-temperature receiver starts operation, keeps the temperature of carbon dioxide working medium in low temperature level reservoir in reasonably scope fluctuation, guarantees refrigeration unit and relevant device safety.
Claims (3)
1. be provided with low temperature level reservoir in the carbon dioxide cascade refrigeration unit of low-temperature receiver, it is characterized in that: emergent low-temperature receiver is set, it is in the gas outlet of refrigeration compressor (2), to connect successively air-cooled condenser pipe (3), device for drying and filtering (4), capillary (5) and evaporation coil (6), and forms refrigerant circulation loop with the air entry of the output termination refrigeration compressor (2) of evaporation coil (6); Evaporation coil (6) in described emergent low-temperature receiver is arranged in the carbon dioxide fluid reservoir of low temperature level high-pressure reservoir.
2. low temperature level reservoir in the carbon dioxide cascade refrigeration unit that is provided with low-temperature receiver according to claim 1, is characterized in that: in described emergent low-temperature receiver, be to adopt R134a cold-producing medium.
3. low temperature level reservoir in the carbon dioxide cascade refrigeration unit that is provided with low-temperature receiver according to claim 1, is characterized in that: described carbon dioxide fluid reservoir is to adopt seamless steel pipe and complete penetraction and fusion in welding butt-welded side seam technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320642793.8U CN203501577U (en) | 2013-10-18 | 2013-10-18 | Low temperature stage liquid accumulator with cold source and in carbon dioxide cascade type refrigerating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320642793.8U CN203501577U (en) | 2013-10-18 | 2013-10-18 | Low temperature stage liquid accumulator with cold source and in carbon dioxide cascade type refrigerating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203501577U true CN203501577U (en) | 2014-03-26 |
Family
ID=50332553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320642793.8U Expired - Lifetime CN203501577U (en) | 2013-10-18 | 2013-10-18 | Low temperature stage liquid accumulator with cold source and in carbon dioxide cascade type refrigerating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203501577U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357854A (en) * | 2021-06-11 | 2021-09-07 | 青岛海尔空调器有限总公司 | Air conditioning system |
-
2013
- 2013-10-18 CN CN201320642793.8U patent/CN203501577U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357854A (en) * | 2021-06-11 | 2021-09-07 | 青岛海尔空调器有限总公司 | Air conditioning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |