CN211823241U - Cold source carbon dioxide cascade refrigeration system is concentrated to refrigerator-freezer - Google Patents
Cold source carbon dioxide cascade refrigeration system is concentrated to refrigerator-freezer Download PDFInfo
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- CN211823241U CN211823241U CN202020313653.6U CN202020313653U CN211823241U CN 211823241 U CN211823241 U CN 211823241U CN 202020313653 U CN202020313653 U CN 202020313653U CN 211823241 U CN211823241 U CN 211823241U
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- refrigerator
- carbon dioxide
- compressor
- liquid
- cold source
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 24
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 23
- 238000005057 refrigeration Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 230000005494 condensation Effects 0.000 claims description 11
- 238000009833 condensation Methods 0.000 claims description 11
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 8
- 238000011084 recovery Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A refrigerator centralized cold source carbon dioxide cascade refrigeration system comprises: the system comprises an R134a compressor (1) and an R744 compressor (10), wherein the R134a compressor is respectively connected with a secondary oil separator (2), an economizer (6) and an R134a gas-liquid separator (9), the secondary oil separator is connected with a shell-and-tube heat exchanger (3), the shell-and-tube heat exchanger is connected with an evaporative condenser (4), the evaporative condenser is connected with an R134a liquid reservoir (5), the R134a liquid reservoir is connected with the economizer, the economizer is connected with an expansion valve (7), the expansion valve is connected with a condensing evaporator (8), and the condensing evaporator is respectively connected with an R134a gas-liquid separator, a desuperheater (12) and an R744 liquid reservoir (13). The utility model discloses be applied to refrigerator-freezer and concentrate cold source carbon dioxide overlapping refrigerating system.
Description
The technical field is as follows:
the utility model relates to a cold source carbon dioxide overlapping refrigerating system is concentrated to refrigerator-freezer.
Background art:
in the refrigerating system of the refrigerator, four parts including a compressor, a condenser, an evaporator and a capillary tube are mainly formed, and a closed circulating system is formed. The heat around the evaporator in the refrigerator is transferred to the condenser to be discharged, and the circulation is repeated and continued to achieve the purpose of refrigeration.
At present, each refrigerating cabinet of a refrigerating system of the refrigerating cabinet is generally provided with a small compressor, when the number of the refrigerating cabinets is large, the operation cost of the refrigerating system of the refrigerating cabinet is increased, and meanwhile, because the distribution of the large number of the refrigerating cabinets is not centralized, the problems of uniform liquid supply and oil return of each refrigerating cabinet cannot be well solved by adopting the traditional Freon refrigerating agent, so that the overlapping refrigerating system selects carbon dioxide as a low-pressure-level refrigerating agent.
The invention content is as follows:
the utility model aims at providing a cold source carbon dioxide overlapping refrigerating system is concentrated to refrigerator-freezer.
The above purpose is realized by the following technical scheme:
a refrigerator centralized cold source carbon dioxide cascade refrigeration system comprises: the system comprises an R134a compressor and an R744 compressor, wherein the R134a compressor is respectively connected with a secondary oil separator, an economizer and an R134a gas-liquid separator, the secondary oil separator is connected with a shell-and-tube heat exchanger, the shell-and-tube heat exchanger is connected with an evaporative condenser, the evaporative condenser is connected with an R134a liquid reservoir, the R134a liquid reservoir is connected with the economizer, the economizer is connected with an expansion valve, the expansion valve is connected with a condensation evaporator, and the condensation evaporator is respectively connected with the R134a gas-liquid separator, a desuperheater and the R744 liquid reservoir.
The refrigerating cabinet centralized cold source carbon dioxide cascade refrigeration system is characterized in that the R744 compressor is respectively connected with the R744 oil separator and the R744 gas-liquid separator, the R744 oil separator is connected with the de-superheater, the R744 gas-liquid separator is connected with the R744 low-pressure circulating barrel prying block, and the R744 low-pressure circulating barrel prying block is respectively connected with the R744 liquid reservoir and the refrigerating cabinet set.
The refrigerator centralized cold source carbon dioxide cascade refrigeration system is characterized in that a refrigerator group is 1200 refrigerators, the refrigerator group is composed of an electronic expansion valve and refrigerators, and the refrigerators are connected with the electronic expansion valve.
The utility model has the advantages that:
1. the utility model discloses overlapping system mainly comprises two parts, and high temperature level part adopts R134a as cycle fluid, and low temperature level part adopts R744 as cycle fluid.
(1) The part of the R134a used as the circulating working medium is compressed by an R134a compressor, enters a shell and tube heat exchanger or an evaporative condenser through a secondary oil separator for heat exchange, the R134a subjected to heat exchange is condensed into high-pressure liquid, enters an R134a liquid storage device, enters an economizer for supercooling, is sprayed into a condensation evaporator through an expansion valve to be evaporated to provide cold energy for condensation of carbon dioxide, and the R134a subjected to heat absorption returns to a gas return port of the compressor through a gas-liquid separator to complete circulation.
(2) The part of R744 as the cycle working medium is after carbon dioxide compressor with low pressure carbon dioxide low pressure gas compression, enter into and go the over heater after the oil separator and cool off, then get into the condensation evaporimeter and carry out the heat transfer with R134a and make high temperature high pressure carbon dioxide gas be condensed into liquid, the carbon dioxide liquid after the condensation gets into in the R744 reservoir, then supply liquid for R744 low pressure circulation bucket sled piece, CO2 pump through in the R744 low pressure circulation bucket sled piece supplies the refrigerator-freezer respectively, adjust the liquid supply volume of each refrigerator-freezer through the electronic expansion valve on each refrigerator-freezer, R744 gets back to R744 low pressure circulation bucket sled piece behind the refrigerator-freezer, get back to R744 vapour and liquid separator through R744 low pressure circulation bucket sled piece, get back to carbon dioxide compressor induction port and accomplish the circulation.
2. The utility model discloses the cold source of 1200 refrigerator-freezers is provided by a big refrigerating unit, has reduced whole refrigerator-freezer refrigerating system's energy consumption. 3. The utility model discloses the refrigerant that the system adopted is whole for the environmental protection refrigerant, and wherein R134a is the well low temperature environmental protection refrigerant that is widely popular at present, and carbon dioxide is as pure natural refrigerant, and ozone layer destroys the latent energy and is 0, and global warming latent energy is 1, has superior thermodynamic property.
4. The utility model discloses utilize the working medium characteristic of R134a refrigerant, increase heat recovery unit and solve winter warm problem, improve whole refrigerating system's performance in winter.
5. The utility model discloses an install electronic expansion valve additional in every refrigerator-freezer for adjust the liquid supply volume of every refrigerator-freezer, guarantee that the liquid supply of every refrigerator-freezer is even.
6. The utility model discloses a pressure loss is less even the remote transport of R744 refrigerant, consequently can satisfy more quantity's refrigerator-freezer and supply liquid simultaneously
7. The utility model is suitable for a more occasion of terminal freezer platform number, if: a large supermarket, a refrigerated food transaction display center and the like.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the system comprises an R134a compressor, a 2 secondary oil separator, a 3 shell-and-tube heat exchanger, a 4 evaporative condenser, a 5R 134a liquid storage device, a 6 economizer, a 7 expansion valve, a 8 condensation evaporator, a 9R 134a gas-liquid separator, a 10R 744 compressor, a 11R 744 oil separator, a 12 desuperheater, a 13R 744 liquid storage device, a 14R 744 low-pressure circulating barrel pry block, a 15 electronic expansion valve, a 16 ice chest, a 17R 744 gas-liquid separator, an 18 ice chest group.
The specific implementation mode is as follows:
example 1:
a refrigerator centralized cold source carbon dioxide cascade refrigeration system comprises: the system comprises an R134a compressor 1 and an R744 compressor 10, wherein the R134a compressor is respectively connected with a secondary oil separator 2, an economizer 6 and an R134a gas-liquid separator 9, the secondary oil separator is connected with a shell-tube heat exchanger 3, the shell-tube heat exchanger is connected with an evaporative condenser 4, the evaporative condenser is connected with an R134a liquid reservoir 5, the R134a liquid reservoir is connected with the economizer, the economizer is connected with an expansion valve 7, the expansion valve is connected with a condensation evaporator 8, and the condensation evaporator is respectively connected with the R134a gas-liquid separator, a desuperheater 12 and an R744 liquid reservoir 13.
Example 2:
according to the carbon dioxide cascade refrigeration system with the ice chest concentrated cold source in the embodiment 1, the R744 compressor is respectively connected with the R744 oil separator 11 and the R744 gas-liquid separator 17, the R744 oil separator is connected with the de-superheater, the R744 gas-liquid separator is connected with the R744 low-pressure circulating barrel prying block 14, and the R744 low-pressure circulating barrel prying block is respectively connected with the R744 liquid reservoir and the ice chest set 18.
Example 3:
according to embodiment 1 or 2, the refrigerator centralized cold source carbon dioxide cascade refrigeration system, the refrigerator group is 1200 refrigerators, the refrigerator group is composed of an electronic expansion valve 15 and a refrigerator 16, and the refrigerator is connected with the electronic expansion valve.
Example 4:
the working principle is as follows: in order to ensure that the liquid supply of a plurality of refrigerating cabinets is uniform, R744 is selected as a low-temperature level circulating working medium of the cascade system, and an electronic expansion valve is additionally arranged in each refrigerating cabinet and used for adjusting the liquid supply amount of each refrigerating cabinet, so that the liquid supply of each refrigerating cabinet is uniform. The R134a refrigerant adopted by the high-temperature stage belongs to medium-high temperature refrigerant, and hot water with higher temperature can be obtained during heat recovery, so that the shell and tube heat exchanger added in the system for heat recovery can be used for the winter heating requirement of an ice chest exhibition area.
Claims (3)
1. A refrigerator centralized cold source carbon dioxide cascade refrigeration system comprises: r134a compressor and R744 compressor, its characterized in that: the R134a compressor is respectively connected with a secondary oil separator, an economizer and a R134a gas-liquid separator, the secondary oil separator is connected with a shell-and-tube heat exchanger, the shell-and-tube heat exchanger is connected with an evaporative condenser, the evaporative condenser is connected with a R134a liquid storage device, the R134a liquid storage device is connected with the economizer, the economizer is connected with an expansion valve, the expansion valve is connected with a condensation evaporator, and the condensation evaporator is respectively connected with the R134a gas-liquid separator, a desuperheater and a R744 liquid storage device.
2. The carbon dioxide cascade refrigeration system with the ice chest concentrated cold source as claimed in claim 1, which is characterized in that: the R744 compressor is respectively connected with an R744 oil separator and an R744 gas-liquid separator, the R744 oil separator is connected with the de-superheater, the R744 gas-liquid separator is connected with an R744 low-pressure circulating barrel prying block, and the R744 low-pressure circulating barrel prying block is respectively connected with the R744 liquid reservoir and the ice bin set.
3. The carbon dioxide cascade refrigeration system with the ice chest concentrated cold source as claimed in claim 2, wherein: the refrigerator group is 1200 refrigerators, the refrigerator group is composed of an electronic expansion valve and a refrigerator, and the refrigerator is connected with the electronic expansion valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020313653.6U CN211823241U (en) | 2020-03-13 | 2020-03-13 | Cold source carbon dioxide cascade refrigeration system is concentrated to refrigerator-freezer |
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|---|---|---|---|
| CN202020313653.6U CN211823241U (en) | 2020-03-13 | 2020-03-13 | Cold source carbon dioxide cascade refrigeration system is concentrated to refrigerator-freezer |
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| CN211823241U true CN211823241U (en) | 2020-10-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322781A (en) * | 2020-03-13 | 2020-06-23 | 万吨通科技有限公司 | Refrigerator centralized cold source carbon dioxide cascade refrigeration system and refrigeration method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322781A (en) * | 2020-03-13 | 2020-06-23 | 万吨通科技有限公司 | Refrigerator centralized cold source carbon dioxide cascade refrigeration system and refrigeration method |
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| TR01 | Transfer of patent right |
Effective date of registration: 20231103 Address after: 436032 No.1 Donghu Road, Gedian Economic and Technological Development Zone, Ezhou City, Hubei Province Patentee after: Wuhan Wanton Huazhong Cold Chain Port Co.,Ltd. Address before: 436070 Commercial Control Huading Industrial Park Office Building, East Side of Chuangye Avenue, Gedian Development Zone, Ezhou City, Hubei Province Patentee before: Wantontong Technology Co.,Ltd. |