CN214581897U - High-efficiency single refrigeration working medium carbon dioxide refrigeration system - Google Patents
High-efficiency single refrigeration working medium carbon dioxide refrigeration system Download PDFInfo
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- CN214581897U CN214581897U CN202120521156.XU CN202120521156U CN214581897U CN 214581897 U CN214581897 U CN 214581897U CN 202120521156 U CN202120521156 U CN 202120521156U CN 214581897 U CN214581897 U CN 214581897U
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Abstract
The utility model discloses a high-efficient single refrigerant's carbon dioxide refrigerating system, include compressor, oil separator, evaporative cooler, reservoir, ethylene glycol heat exchanger, flash drum that link up in order through the pipeline, be provided with first pipeline and second pipeline between compressor and the flash drum, first pipeline intercommunication is in between the gas vent of flash drum and the import of compressor, the second pipeline is including setting up first section, setting between the leakage fluid dram of flash drum and the shell side import of regenerator and is in second section between the shell side export of regenerator and the shell side import and the third section between the tube side export of intercommunication regenerator and the compressor import, be provided with flow controller and evaporimeter on the second section. The utility model is used for refrigerate under the subcritical operating mode, it uses single working medium carbon dioxide as the refrigerant, environmental protection, economy, and engineering cost is low, refrigeration efficiency is high, the system operation is stable, is particularly suitable for freezer refrigeration demand.
Description
Technical Field
The utility model belongs to the technical field of the freezer refrigeration technology and specifically relates to a carbon dioxide refrigerating system of high-efficient single refrigeration working medium is related to.
Background
With the rapid development of the refrigeration, freezing and storage industry, the construction of domestic refrigerators in recent years enters a peak period, and the demand of the refrigerators is increased. At present, the refrigerants selected by the refrigeration system of the refrigeration house mainly comprise three refrigerants of ammonia (NH3), Freon and carbon dioxide (R744). Ammonia is toxic and has the possibility of explosion under certain conditions, and the use conditions are relatively limited; freon is influenced by greenhouse effect, the use amount is gradually limited, and the environment of being eliminated is met; carbon dioxide (R744) is an atmospheric environment-friendly refrigerant and has wide application prospect. However, because of its low critical temperature and high critical pressure, it is used as refrigerant CO in the refrigeration design of cold storage2It is desirable to use in combination with other refrigerants, primarily in subcritical refrigeration systems. Usually, CO2The cascade refrigeration system has the disadvantages of more equipment parts, higher manufacturing cost, heat exchange temperature difference of the cold carrying system and relatively lower refrigeration efficiency. CO 22The transcritical refrigeration cycle unit has higher efficiency, but is mainly applied to places such as refrigerated cabinets, automobile air conditioners, heat pump units, artificial ice yards and the like at present and is less applied to refrigeration systems of refrigerated storages.
Disclosure of Invention
In order to solve the problem, the utility model provides a carbon dioxide refrigerating system of high-efficient single refrigeration working medium specifically can take following technical scheme:
high-efficient single refrigerant's carbon dioxide refrigerating system, include compressor, oil separator, evaporative cooler, reservoir, ethylene glycol heat exchanger, flash drum that links up in order through the pipeline, be provided with first pipeline and second pipeline between compressor and the flash drum, first pipeline intercommunication is in between the gas vent of flash drum and the import of compressor, the second pipeline is including setting up first section, setting between the leakage fluid dram of flash drum and the shell side import of regenerator and is in second section between the shell side export of regenerator and the shell side import and the third section between the tube side export of intercommunication regenerator and the compressor import, be provided with flow controller and evaporimeter on the second section.
The shell pass inlet of the ethylene glycol heat exchanger is connected with the ethylene glycol solution liquid supply pipe, the shell pass outlet of the ethylene glycol heat exchanger is connected with the ethylene glycol solution liquid discharge pipe, the tube pass inlet of the ethylene glycol heat exchanger is connected with the liquid discharge pipe of the liquid reservoir, and the tube pass outlet of the ethylene glycol heat exchanger is connected with the inlet pipe of the flash barrel.
The compressor is provided in parallel with a plurality of compressors.
The oil separator is connected with the oil storage tank.
The evaporative cooler is of a modular structure and comprises a base, a cooling module and an upper cover, wherein the base is provided with a liquid storage cavity and a first air inlet cavity which are adjacently arranged, the top of the liquid storage cavity is provided with a liquid inlet, the bottom of the liquid storage cavity is provided with a liquid discharge valve, the first air inlet cavity is provided with a first air inlet positioned on the side surface and a first air outlet positioned on the top, and the first air inlet is provided with a valve; the cooling module is positioned above the base and is provided with a cooling cavity, and an air inlet cavity and a separation cavity which are respectively positioned at two sides of the cooling cavity; the bottom of the air inlet two cavities is provided with an air inlet two port corresponding to the air outlet one port, and the top of the air inlet two cavities is provided with an air outlet two port; the top of the cooling cavity is provided with three air inlets, and the cooling cavity is internally provided with a sprayer and CO from top to bottom2The cooling coil, the lateral wall of the cooling cavity is provided with three exhaust ports communicated with the separation cavity, and the three exhaust ports are positioned in the CO2The lower part of the cooling coil; the top of the separation cavity is provided with four exhaust portsThe bottom is provided with a liquid outlet corresponding to the liquid inlet; the upper cover is positioned above the cooling module and is provided with a rotary cavity and an exhaust cavity which are adjacently arranged, the rotary cavity is positioned above the cooling cavity and the air inlet cavity, and the bottom of the rotary cavity is provided with four air inlet ports corresponding to the two air outlet ports and five exhaust ports corresponding to the three air inlet ports; the bottom of the exhaust cavity is provided with five air inlets corresponding to the four exhaust ports, and the top of the exhaust cavity is provided with an air outlet for installing an exhaust fan.
The utility model provides a carbon dioxide refrigerating system of high-efficient single refrigeration working medium for refrigeration under the subcritical operating mode, it uses single working medium carbon dioxide as the refrigerant, environmental protection, economy, and engineering cost is low, refrigeration efficiency is high, the system operation is stable, is particularly suitable for freezer refrigeration demand.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the evaporative cooler of fig. 1.
Fig. 3 is an exploded view of fig. 2.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific working procedures are given, but the scope of the present invention is not limited to the following embodiments.
High-efficient single refrigerant's carbon dioxide refrigerating system, adopt environmental protection, economical refrigerant carbon dioxide as single refrigerant, refrigerate under subcritical operating mode, adopt the multi-hand section to improve carbon dioxide refrigerating unit's efficiency and system stability, can retrieve the condensation heat extraction simultaneously in order to satisfy relevant production and use the heat demand.
Specifically, as shown in fig. 1, high-efficient single refrigerant's carbon dioxide refrigerating system, include the compressor 1 that links up in order through the pipeline, oil separator 2, evaporative cooler 3, reservoir 4, ethylene glycol heat exchanger 5, flash drum 6, be provided with first pipeline and second pipeline between compressor 1 and the flash drum 2, first pipeline intercommunication is between flash drum 6's gas vent 6.1 and compressor 1's import, the second pipeline includes first section, second section and third section, wherein, first section is used for connecting flash drum 6's leakage fluid dram 6.2 and regenerator 7's shell side import, the second section is used for connecting regenerator 7's shell side export and tube side import, install flow controller and evaporimeter on it in proper order, the third section is used for connecting regenerator 7's tube side export and compressor 1 import.
The shell side inlet of the ethylene glycol heat exchanger 5 is connected with an ethylene glycol solution liquid supply pipe 5.1, the shell side outlet of the ethylene glycol heat exchanger 5 is connected with an ethylene glycol solution liquid discharge pipe 5.2, the tube side inlet of the ethylene glycol heat exchanger 5 is connected with a liquid discharge pipe of the liquid storage device 4, and the tube side outlet of the ethylene glycol heat exchanger 5 is connected with an inlet pipe of the flash evaporation barrel 6.
The utility model discloses well compressor 1 is provided with threely side by side, and oil separator 2 then links to each other with the oil storage tank. When the system is in operation, the connection with CO is closed2A valve between the inlet pipe and the outlet pipe of the heat exchange pipe 8.1 and the communicating pipes of the oil separator 2 and the evaporative cooler 3 ensures that high-temperature and high-pressure CO generated by the compressor 12After passing through an oil separator 2, gas enters an evaporative cooler 3 for condensation, then enters a liquid storage device 4, is cooled by an ethylene glycol heat exchanger 5, is throttled and enters a flash drum 6, the flash gas enters a first pipeline through an exhaust port of the flash drum 6 to be sucked by a compressor 1, liquid at the bottom of the flash drum 6 enters a second pipeline, namely enters a regenerator 7 shell pass for supercooling, and then sequentially enters a throttle and an evaporator to become CO2The gas then returns to the tube side of the heat regenerator 7 to be heated and then enters the compressor 1 to be compressed.
The evaporative cooler 3 is different from a traditional evaporative condenser, and the exhaust temperature of the traditional evaporative condenser is limited by the temperature of incoming cooling water, so that the exhaust heat carrying capacity and the moisture carrying capacity of the condenser are limited, the air volume of an exhaust fan and the spraying volume of the cooling water are both large, and the energy consumption is high. And the utility model provides an evaporative cooler 3 evaporation heat-sinking capability is stronger, forms the higher saturated humid air of temperature in the exit, and this saturated humid air take the heat-sinking capability and take the wet ability all higher, has reduced the amount of wind of exhaust fan and the flow of cooling water from this, and exhaust fan energy consumption and cooling water consumption are all lower, consequently have important energy-conserving and environmental protection meaning.
As shown in fig. 2 and 3, the evaporative cooler 3 may be an air-cooler type cooler or a modular evaporative cooler. Modular evaporative coolers are typically assembled from a base, at least one cooling module and a cover. The base is provided with a liquid storage cavity 311 and a first air inlet cavity 312 which are adjacently arranged, the top of the liquid storage cavity 311 is provided with a liquid inlet K1, the bottom of the liquid storage cavity 311 is provided with a liquid discharge valve Q, the first air inlet cavity 312 is provided with an air inlet J1 positioned on the side and an air outlet P1 positioned on the top, and a valve is arranged at the air inlet J1. The cooling module is positioned above the base and is provided with a cooling cavity 321, an air inlet cavity 322 and a separating cavity 323 which are respectively positioned at two sides of the cooling cavity, the bottom of the air inlet cavity 322 is provided with an air inlet second port J2 corresponding to the air outlet first port P1, and the top of the air inlet cavity 322 is provided with an air outlet second port P2; the top of the cooling chamber 321 is provided with three air inlets J3, and the sprayer 324 and CO are arranged in the cooling chamber 321 from top to bottom2A cooling coil 325, wherein the side wall of the cooling cavity 321 is provided with three exhaust ports P3 communicated with the separation cavity 323, and the three exhaust ports P3 are positioned in CO2Below cooling coil 325; the top of the separation cavity 323 is provided with a four-port exhaust P4, and the bottom of the separation cavity 323 is provided with a liquid outlet K2 corresponding to the liquid inlet K1. The upper cover is positioned above the cooling module and is provided with a rotary cavity 331 and an exhaust cavity 332 which are adjacently arranged, the rotary cavity 331 is positioned above the cooling cavity 321 and the air inlet cavity 322, and the bottom of the rotary cavity 331 is provided with an air inlet four-port J4 corresponding to the air outlet two-port P2 and an air outlet five-port P5 corresponding to the air inlet three-port J3; the bottom of the exhaust cavity 332 is provided with an air inlet five-port J5 corresponding to the exhaust four-port P4, and the top of the exhaust cavity 332 is provided with an exhaust port F for mounting an exhaust fan 333. After the base, the cooling module and the upper cover are sequentially spliced and assembled from bottom to top, two gas channels or liquid channels are formed by the exhaust one port P1, the gas inlet two port J2, the exhaust two port P2, the gas inlet four port J4, the exhaust five port P5, the gas inlet three port J3, the exhaust four port P4, the gas inlet five port J5, the liquid inlet K1 and the liquid outlet K2 in pairs, so that gas enters the gas inlet two cavity 322, the rotary cavity 331, the cooling cavity 321, the separation cavity 323 and the upper cover from the gas inlet one cavity 312 in sequenceThe gas discharge cavity 332, and the liquid enters the liquid storage cavity 311 from the separation cavity 323. The evaporative cooler 3 adopting the modular design can flexibly configure different numbers of cooling modules in different modes to adapt to the refrigeration houses with different scales, greatly facilitates the design, production and installation of the cooler, and reduces the production and maintenance cost of the cooler product.
The utility model discloses in be provided with flash drum 6 and flow controller, CO2Gas enters a liquid storage device 4 after being condensed by an evaporative cooler 3, and enters a flash evaporation barrel 6 after being cooled by an ethylene glycol heat exchanger 5 through primary throttling, flash gas is sucked by a compressor 1, liquid in the flash evaporation barrel 6 enters a heat regenerator 7 for supercooling, and then is connected into an evaporator liquid supply pipe through secondary throttling, and in the process, the system can remove part of the flash gas by using secondary throttling liquid supply, so that the refrigeration efficiency is improved.
The utility model discloses heat that liquid carried in well ethylene glycol heat exchanger 5's ethylene glycol solution fluid-discharge tube 5.2 can be used to the frost-proof heating of terrace and CO2The hot alcohol solution of the air cooler system is used for defrosting. Due to single CO2The exhaust pressure of the subcritical cycle compressor unit is higher, and the exhaust pressure is directly used for CO2The air cooler hot gas defrosting has the advantages that the pressure bearing capacity of the coil pipe of the air cooler is large, potential safety hazards exist, defrosting is safe and quick through the alcohol solution, and CO can be further reduced2The liquid temperature improves the refrigeration efficiency.
It should be noted that in the description of the present invention, terms of orientation or positional relationship such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Claims (5)
1. The utility model provides a carbon dioxide refrigerating system of high-efficient single refrigerant which characterized in that: the flash drum type heat recovery device comprises a compressor, an oil separator, an evaporative cooler, a liquid storage device, an ethylene glycol heat exchanger and a flash drum which are sequentially connected through pipelines, wherein a first pipeline and a second pipeline are arranged between the compressor and the flash drum, the first pipeline is communicated between an exhaust port of the flash drum and an inlet of the compressor, the second pipeline comprises a first section arranged between a liquid discharge port of the flash drum and a shell side inlet of a heat regenerator, a second section arranged between a shell side outlet and a tube side inlet of the heat regenerator and a third section communicated between a tube side outlet of the heat regenerator and the inlet of the compressor, and a flow controller and an evaporator are arranged on the second section.
2. The high efficiency single refrigerant carbon dioxide refrigeration system as set forth in claim 1, wherein: the shell pass inlet of the ethylene glycol heat exchanger is connected with the ethylene glycol solution liquid supply pipe, the shell pass outlet of the ethylene glycol heat exchanger is connected with the ethylene glycol solution liquid discharge pipe, the tube pass inlet of the ethylene glycol heat exchanger is connected with the liquid discharge pipe of the liquid reservoir, and the tube pass outlet of the ethylene glycol heat exchanger is connected with the inlet pipe of the flash barrel.
3. The high efficiency single refrigerant carbon dioxide refrigeration system as set forth in claim 1, wherein: the compressor is provided in parallel with a plurality of compressors.
4. The high efficiency single refrigerant carbon dioxide refrigeration system as set forth in claim 1, wherein: the oil separator is connected with the oil storage tank.
5. The high efficiency single refrigerant carbon dioxide refrigeration system as set forth in claim 1, wherein: the evaporative cooler is of a modular structure and comprises a base, a cooling module and an upper cover, wherein the base is provided with a liquid storage cavity and a first air inlet cavity which are adjacently arranged, the top of the liquid storage cavity is provided with a liquid inlet, the bottom of the liquid storage cavity is provided with a liquid discharge valve, the first air inlet cavity is provided with a first air inlet positioned on the side surface and a first air outlet positioned on the top, and the first air inlet is provided with a valve; the cooling module is arranged above the base and is provided with a cooling cavity and two cooling cavities respectively arranged at the cooling cavityA side inlet chamber and a separation chamber; the bottom of the air inlet two cavities is provided with an air inlet two port corresponding to the air outlet one port, and the top of the air inlet two cavities is provided with an air outlet two port; the top of the cooling cavity is provided with three air inlets, and the cooling cavity is internally provided with a sprayer and CO from top to bottom2The cooling coil, the lateral wall of the cooling cavity is provided with three exhaust ports communicated with the separation cavity, and the three exhaust ports are positioned in the CO2The lower part of the cooling coil; the top of the separation cavity is provided with four exhaust ports, and the bottom of the separation cavity is provided with a liquid outlet corresponding to the liquid inlet; the upper cover is positioned above the cooling module and is provided with a rotary cavity and an exhaust cavity which are adjacently arranged, the rotary cavity is positioned above the cooling cavity and the air inlet cavity, and the bottom of the rotary cavity is provided with four air inlet ports corresponding to the two air outlet ports and five exhaust ports corresponding to the three air inlet ports; the bottom of the exhaust cavity is provided with five air inlets corresponding to the four exhaust ports, and the top of the exhaust cavity is provided with an air outlet for installing an exhaust fan.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120521156.XU CN214581897U (en) | 2021-03-11 | 2021-03-11 | High-efficiency single refrigeration working medium carbon dioxide refrigeration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120521156.XU CN214581897U (en) | 2021-03-11 | 2021-03-11 | High-efficiency single refrigeration working medium carbon dioxide refrigeration system |
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| CN214581897U true CN214581897U (en) | 2021-11-02 |
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| CN202120521156.XU Active CN214581897U (en) | 2021-03-11 | 2021-03-11 | High-efficiency single refrigeration working medium carbon dioxide refrigeration system |
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