CN105758048B - The cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator - Google Patents
The cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator Download PDFInfo
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- CN105758048B CN105758048B CN201610286624.3A CN201610286624A CN105758048B CN 105758048 B CN105758048 B CN 105758048B CN 201610286624 A CN201610286624 A CN 201610286624A CN 105758048 B CN105758048 B CN 105758048B
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- Prior art keywords
- solenoid valve
- evaporator
- condenser
- compressor
- temperature level
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
Abstract
The invention discloses a kind of cascade refrigeration systems of variable-flow either simplex matter parallel condensing device and evaporator.Every refrigeration compressor set of the present invention is by refrigeration compressor and four solenoid valves,Condenser,Evaporator forms,The exhaust end of every refrigeration compressor is connected separately with the first solenoid valve and second solenoid valve,The suction end of every refrigeration compressor is connected separately with third solenoid valve and the 4th solenoid valve,The import of the first solenoid valve and condenser that are connected on every refrigeration compressor connects,It is connect with condenser/evaporator evaporation side-entrance by high-temperature level throttle valve after the outlet parallel connection of every condenser,It is connect with condenser/evaporator condensation side-entrance after the second solenoid valve parallel connection connected on every refrigeration compressor,It is connect with condenser/evaporator evaporation side outlet after the third solenoid valve parallel connection connected on every refrigeration compressor,The outlet of the 4th solenoid valve and evaporator that are connected on every refrigeration compressor connects,It is connect with condenser/evaporator condensation side outlet by low-temperature level throttle valve after every evaporator parallel connection.The cascade refrigeration system of the present invention is made of either simplex matter, and it is simple not have to devices, the system structures such as expansion vessel.
Description
Technical field
The present invention relates to a kind of refrigeration units, more specifically, being related to a kind of cascade refrigeration circulatory system of multi-machine heads, use
To improve cascade refrigeration system efficiency, can be adjusted simultaneously for the refrigerant flow of refrigeration system.
Background technology
Single-stage compression refrigeration system is not suitable for compression ratio (exhaust due to being limited by compressor suction and discharge compression ratio
The ratio between pressure and pressure of inspiration(Pi)) it is more than 12 cryogenic refrigerating system.In the prior art, the generally use when compression ratio is more than 12
Double-stage compressive refrigerating system.Two-stage compression refrigeration unit can be driven by a motor, can also be realized by multi-machine heads combo.
But both mode high-low pressure intercommunications, the problem of oil return of compressor are not easily solved.
When needing lower temperature refrigeration, cascade refrigeration system is also good settling mode.Heat passes through low-temperature level system
The working medium of cooling system is absorbed heat, and passes to the condenser/evaporator of connection low-temperature level refrigeration system and high-temperature level refrigeration system, then by height
Warm grade refrigeration system working medium transfers heat in environment.This traditional cascade refrigeration system is made of two kinds of working medium, high temperature
Grade refrigeration system uses high temperature refrigerant, low-temperature level refrigeration system to use cryogenic fluid.But since cryogenic fluid is at normal temperatures
Supercriticality usually sets expansion vessel, system complex and change working medium flow control difficult to realize in low-temperature level refrigeration system
System.
Invention content
The present invention is in order to overcome the defects of the prior art, to provide a kind of cascade refrigeration cyclic system of multi-machine heads either simplex matter
System, to improve cascade refrigeration system efficiency, can be adjusted simultaneously for the working medium flow of refrigeration system.
The present invention is achieved through the following technical solutions：
A kind of cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator, including more refrigeration compressors
Group, condenser/evaporator, high-temperature level throttle valve and low-temperature level throttle valve, every refrigeration compressor set is by refrigeration compressor, the first electricity
Magnet valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, condenser, evaporator composition, the exhaust of every refrigeration compressor
End is connected separately with the first solenoid valve and second solenoid valve, and the suction end of every refrigeration compressor is connected separately with third solenoid valve
With the 4th solenoid valve, the import connection of the first solenoid valve and condenser that connect on every refrigeration compressor, every condenser
Side-entrance is evaporated after outlet is in parallel by high-temperature level throttle valve and condenser/evaporator to connect, the connected on every refrigeration compressor
It is connect with condenser/evaporator condensation side-entrance after two solenoid valve parallel connections, the third solenoid valve connected on every refrigeration compressor is in parallel
It is connect afterwards with condenser/evaporator evaporation side outlet, the outlet of the 4th solenoid valve and evaporator that are connected on every refrigeration compressor connects
It connects, is connect with condenser/evaporator condensation side outlet by low-temperature level throttle valve after every evaporator parallel connection.
When refrigeration compressor is as high-temperature level refrigeration system compressors, the first solenoid valve and third solenoid valve are opened, the
Two solenoid valves and the 4th solenoid valve are closed, and are entered in condenser by the first solenoid valve after refrigeration compressor compresses working medium at this time
Condensation, condensed working medium, which enters through the throttling of high-temperature level throttle valve in condenser/evaporator, evaporates, and absorbs the condensation heat of low-temperature level, then
Compressor is returned to by third solenoid valve；When refrigeration compressor is as low-temperature level refrigeration system compressor, second solenoid valve and
4th solenoid valve is opened, and the first solenoid valve and third solenoid valve are closed, and pass through second after refrigeration compressor compresses working medium at this time
Solenoid valve, which enters in condenser/evaporator, to be condensed, and is radiated to high-temperature level, and condensed working medium, which throttles to enter through low-temperature level throttle valve, steams
It is evaporated in hair device, generates refrigeration phenomenon, compressor is returned to using the 4th solenoid valve.
The refrigeration compressor is in screw compressor, rotor compressor, helical-lobe compressor, piston compressor or other types
Formula refrigeration compressor it is any, variable-flow mode is adjusted by AC frequency conversion or DC frequency-changing, and working medium can also be used and unload
Carry the flow-rate adjustment that working medium is realized with load mode.
The condenser is air-cooled condenser, water-cooled condenser or evaporative condenser.
The condenser/evaporator is plate heat exchanger or double pipe heat exchanger.
The evaporator is air-cooled, solution refrigerating formula.
The high-temperature level throttle valve and low-temperature level throttle valve are electric expansion valve, heating power expansion valve, capillary or orifice plate section
Flow device.
The solenoid valve can be by replacements such as hand stop valve, ball valves.
Compared with prior art, the beneficial effects of the invention are as follows：
1, system is flexible：Refrigeration compressor in the cascade refrigeration system of the present invention can all pass through suction end and exhaust end electricity
Magnet valve is turned on and off the mutual conversion for realizing high-temperature level refrigeration compressor and low-temperature level refrigeration compressor, i.e., appointing in system
One refrigeration compressor all can serve as high-temperature level refrigeration compressor or low-temperature level refrigeration compressor uses, and be convenient for energy between grade
Amount is adjusted.
2, simple system：The cascade refrigeration system of the present invention is made of either simplex matter, does not have to the devices such as expansion vessel, system knot
Structure is simple.
3, efficient：Due to realizing control, high-temperature level refrigeration system and low-temperature level refrigeration system using change working medium flow mode
Uniting, working medium flow proportioning is reasonable, and system effectiveness is high.
4, compressor problem of oil return is solved：High-temperature level refrigeration system of the present invention is isolated with low-temperature level refrigeration system, is solved
The oil return unevenness problem occurred when using two-stage compression cycle system.
Description of the drawings
Fig. 1 show variable-flow either simplex matter parallel condensing device of the present invention, evaporator cascade refrigeration system schematic diagram.
In figure：1. refrigeration compressor, the first solenoid valves of 2-1., 2-2. second solenoid valves, 2-3. third solenoid valves, 2-4.
Four solenoid valves, 3. condensers, 4-1. high-temperature level throttle valves, 4-2. low-temperature level throttle valves, 5. condenser/evaporators, 6. evaporators.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments to the detailed description of the invention.
Embodiment 1
Fig. 1 is the variable-flow either simplex matter parallel condensing device of the present invention, evaporator cascade refrigeration system schematic diagram, is made by more
Cold compressor 1, more condensers 3, condenser/evaporator 5, more evaporators 6, high-temperature level throttle valve 4-1 and low-temperature level throttle valve 4-
2 compositions, the exhaust end of every refrigeration compressor 1 are connected separately with the first solenoid valve 2-1 and second solenoid valve 2-2, every
The suction end of the refrigeration compressor 1 is connected separately with third solenoid valve 2-3 and the 4th solenoid valve 2-4, every refrigeration pressure
The the first solenoid valve 2-1 connected on contracting machine 1 is connect with the import of the condenser 3, and the outlet of every condenser 3 is simultaneously
Side-entrance is evaporated after connection with the condenser/evaporator 5 by the high-temperature level throttle valve 4-1 to connect, every refrigeration compressor
Side-entrance is condensed after the second solenoid valve 2-2 parallel connections connected on 1 with the condenser/evaporator 5 to connect, every refrigeration
Side outlet is evaporated after the third solenoid valve 2-3 parallel connections connected on compressor 1 with the condenser/evaporator 5 to connect, every institute
It states the 4th solenoid valve 2-4 connected on refrigeration compressor 1 to connect with the outlet of the evaporator 6, every evaporator 6
Side outlet is condensed after inlet parallel with the condenser/evaporator 5 by the low-temperature level throttle valve 4-2 to connect.
It is described when the first solenoid valve 2-1 and the third solenoid valve 2-3 opening of the connection of the refrigeration compressor 1
When second solenoid valve 2-2 and the 4th solenoid valve 2-4 is closed, the system that the refrigeration compressor 1 connects is cascade refrigeration system
The high-temperature level of system, through in the first solenoid valve 2-1 to the condenser 3 after the refrigeration compressor 1 compresses working medium at this time
Condensation enters in the condenser/evaporator 5 after high-temperature level throttle valve 4-1 throttlings and evaporates, absorbs the condensation heat of low-temperature level,
Working medium after evaporation is returned to through the third solenoid valve 2-3 in the refrigeration compressor 1；It is connected when the refrigeration compressor 1
The second solenoid valve 2-2 and the 4th solenoid valve 2-4 is opened, the first solenoid valve 2-1 and the third solenoid valve 2-3
When closing, the system that the refrigeration compressor 1 connects is the low-temperature level of cascade refrigeration system, and the refrigeration compressor 1 will at this time
Through being condensed in the second solenoid valve 2-2 to the condenser/evaporator 5 after working medium compression, radiate to high-temperature level, through the low temperature
Enter in the evaporator 6 after the 4-2 throttlings of grade throttle valve and evaporate, generates refrigeration phenomenon, returned using the 4th solenoid valve 2-4
Into refrigeration compressor 1.
Parallel condensing device, evaporator cascade refrigeration system are only listed in the embodiment of the present invention, it in practical applications can be with
Using common condenser, parallel evaporator cascade refrigeration system and parallel condensing device, share evaporator cascade refrigeration system.
Any compressor of variable-flow either simplex matter cascade refrigeration system of the present invention can become high temperature by valve transfer
Grade refrigeration system or low-temperature level refrigeration system compressor, and can realize high-temperature level refrigeration by the start-stop or motor frequency conversion of compressor
The changes in flow rate of system or low-temperature level refrigeration system.
In specific use, refrigeration compressor can be adopted partly or entirely the variable-flow either simplex matter cascade refrigeration system of the present invention
With frequency refrigeration compressor is determined, to reduce investment.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator, which is characterized in that made including more
Cold compression unit, condenser/evaporator, high-temperature level throttle valve and low-temperature level throttle valve, every refrigeration compressor set is by refrigerant compression
Machine, the first solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, condenser, evaporator composition, every refrigerant compression
The exhaust end of machine is connected separately with the first solenoid valve and second solenoid valve, and the suction end of every refrigeration compressor is connected separately with
Three solenoid valves and the 4th solenoid valve, the import connection of the first solenoid valve and condenser that connect on every refrigeration compressor, every
It is connect with condenser/evaporator evaporation side-entrance by high-temperature level throttle valve after the outlet parallel connection of condenser, on every refrigeration compressor
It is connect with condenser/evaporator condensation side-entrance after the second solenoid valve parallel connection of connection, the third electricity connected on every refrigeration compressor
It is connect with condenser/evaporator evaporation side outlet after magnet valve parallel connection, the 4th solenoid valve and evaporator connected on every refrigeration compressor
Outlet connection, condense side outlet by low-temperature level throttle valve and condenser/evaporator after every evaporator parallel connection and connect, institute
It states the first solenoid valve and third solenoid valve to open, the second solenoid valve and the 4th solenoid valve are closed, and refrigeration compressor is by working medium
Entered in the condenser by first solenoid valve after compression and condensed, condensed working medium is through the high-temperature level throttle valve section
Stream, which enters in the condenser/evaporator, to be evaporated, and absorbs the condensation heat of low-temperature level, compressor is returned to using the third solenoid valve；
Constitute compressor high-temperature level refrigeration system；The second solenoid valve and the 4th solenoid valve are opened, first solenoid valve and third
Solenoid valve is closed, and is entered in the condenser/evaporator by the second solenoid valve after working medium compression and is condensed, radiated to high-temperature level,
Condensed working medium, which throttles to enter in the evaporator through the low-temperature level throttle valve, evaporates, and refrigeration phenomenon is generated, using institute
It states the 4th solenoid valve and returns to compressor, constitute compressor low-temperature level refrigeration system.
2. the cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator according to claim 1, feature
It is, the refrigeration compressor is screw compressor, rotor compressor, helical-lobe compressor or piston compressor.
3. the cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator according to claim 1, feature
It is, the condenser is air-cooled condenser, water-cooled condenser or evaporative condenser.
4. the cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator according to claim 1, feature
It is, the condenser/evaporator is plate heat exchanger or double pipe heat exchanger.
5. the cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator according to claim 1, feature
It is, the evaporator is air-cooled or solution refrigerating formula.
6. the cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator according to claim 1, feature
It is, the high-temperature level throttle valve and low-temperature level throttle valve are electric expansion valve, heating power expansion valve, capillary or orifice throttle dress
It sets.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610286624.3A CN105758048B (en) | 2016-05-03 | 2016-05-03 | The cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator |
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| CN201610286624.3A CN105758048B (en) | 2016-05-03 | 2016-05-03 | The cascade refrigeration system of variable-flow either simplex matter parallel condensing device and evaporator |
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| CN105758048B true CN105758048B (en) | 2018-07-20 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818958A (en) * | 2010-02-11 | 2010-09-01 | 重庆远雄制冷成套设备有限公司 | Three-group plate ice machine hot-gas deicing refrigeration system |
| CN101929753A (en) * | 2010-02-09 | 2010-12-29 | 重庆远雄制冷成套设备有限公司 | Dual working condition refrigeration system for making ice and cold water |
| CN102022851A (en) * | 2010-12-22 | 2011-04-20 | 天津商业大学 | Two-stage compression refrigerating system |
| CN102032705A (en) * | 2010-12-22 | 2011-04-27 | 天津商业大学 | Two-stage compression heat pump system |
| CN102901261A (en) * | 2012-11-12 | 2013-01-30 | 天津商业大学 | Two-stage multi-unit single-throttling incomplete-intercooling refrigeration system |
| CN102901262A (en) * | 2012-11-12 | 2013-01-30 | 天津商业大学 | Two-stage multiplex secondary throttling and intermediate incomplete cooling type refrigerating system |
| CN103335437A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | One-stage throttling incomplete-inter-cooling double-working-condition refrigerating system |
| EP2772707A2 (en) * | 2013-02-28 | 2014-09-03 | Whirlpool Corporation | Multiple evaporator control using pwm valve/compressor |
| CN205606943U (en) * | 2016-05-03 | 2016-09-28 | 天津商业大学 | Cascade refrigeration system of parallelly connected condenser of unsteady flow volume simplex matter and evaporimeter |
-
2016
- 2016-05-03 CN CN201610286624.3A patent/CN105758048B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929753A (en) * | 2010-02-09 | 2010-12-29 | 重庆远雄制冷成套设备有限公司 | Dual working condition refrigeration system for making ice and cold water |
| CN101818958A (en) * | 2010-02-11 | 2010-09-01 | 重庆远雄制冷成套设备有限公司 | Three-group plate ice machine hot-gas deicing refrigeration system |
| CN102022851A (en) * | 2010-12-22 | 2011-04-20 | 天津商业大学 | Two-stage compression refrigerating system |
| CN102032705A (en) * | 2010-12-22 | 2011-04-27 | 天津商业大学 | Two-stage compression heat pump system |
| CN102901261A (en) * | 2012-11-12 | 2013-01-30 | 天津商业大学 | Two-stage multi-unit single-throttling incomplete-intercooling refrigeration system |
| CN102901262A (en) * | 2012-11-12 | 2013-01-30 | 天津商业大学 | Two-stage multiplex secondary throttling and intermediate incomplete cooling type refrigerating system |
| EP2772707A2 (en) * | 2013-02-28 | 2014-09-03 | Whirlpool Corporation | Multiple evaporator control using pwm valve/compressor |
| CN103335437A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | One-stage throttling incomplete-inter-cooling double-working-condition refrigerating system |
| CN205606943U (en) * | 2016-05-03 | 2016-09-28 | 天津商业大学 | Cascade refrigeration system of parallelly connected condenser of unsteady flow volume simplex matter and evaporimeter |
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| CN105758048A (en) | 2016-07-13 |
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