CN205641653U - Cascade refrigeration system of unsteady flow volume simplex matter sharing condenser and evaporimeter - Google Patents

Cascade refrigeration system of unsteady flow volume simplex matter sharing condenser and evaporimeter Download PDF

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Publication number
CN205641653U
CN205641653U CN201620390607.XU CN201620390607U CN205641653U CN 205641653 U CN205641653 U CN 205641653U CN 201620390607 U CN201620390607 U CN 201620390607U CN 205641653 U CN205641653 U CN 205641653U
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China
Prior art keywords
condenser
electromagnetic valve
compressor
temperature level
valve
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Expired - Fee Related
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CN201620390607.XU
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Chinese (zh)
Inventor
杨永安
严雷
李瑞申
郑标帝
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Tianjin University of Commerce
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Tianjin University of Commerce
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Abstract

The utility model discloses a cascade refrigeration system of unsteady flow volume simplex matter sharing condenser and evaporimeter. The utility model discloses every compressor group comprises compressor and four solenoid valves, first solenoid valve and second solenoid valve are connected respectively to compressor's exhaust end, third solenoid valve and fourth solenoid valve are connected respectively to every compressor's the end of breathing in, every compressor goes up behind the first solenoid valve parallel connection who connects the access connection with the condenser, every compressor goes up the parallelly connected back of the second solenoid valve of connecting and is connected with condensing evaporator condensation side -entrance, every compressor goes up parallelly connected back of the third solenoid valve of connecting and condensing evaporator evaporation side exit linkage, every compressor goes up the exit linkage of parallelly connected back of the fourth solenoid valve of connecting and evaporimeter, the export of condenser is connected through high temperature level choke valve and condensing evaporator evaporation side -entrance, and the export of condensing evaporator condensation side is through low -temperature level choke valve and evaporimeter access connection. The utility model discloses a cascade refrigeration system comprises simplex matter, the devices such as container that need not expand, system simple structure.

Description

Variable-flow either simplex matter common condenser and the cascade refrigeration system of vaporizer
Technical field
This utility model relates to a kind of refrigeration unit, in particular, relates to the overlapping system of a kind of multi-machine heads SAPMAC method system, in order to improve cascade refrigeration system efficiency, simultaneously for the refrigerant flow of refrigeration system Can be adjusted.
Background technology
Single-stage compression refrigeration system, owing to being limited by compressor suction and discharge compression ratio, is not suitable for compression Than the ratio of pressure of inspiration(Pi) (pressure at expulsion with) cryogenic refrigerating system more than 12.In the prior art, when Double-stage compressive refrigerating system is generally used when compression ratio is more than 12.Two-stage compression refrigeration unit can be by one Driven by motor, it is also possible to realized by multi-machine heads combo.But both mode high-low pressure intercommunications, compressor Problem of oil return be not easily solved.
When needs lower temperature refrigeration, cascade refrigeration system is also good settling mode.Heat passes through The working medium heat absorption of low-temperature level refrigeration system, passes to connect low-temperature level refrigeration system and high-temperature level refrigeration system Condenser/evaporator, then transferred heat in environment by high-temperature level refrigeration systematic working medium.This traditional Cascade refrigeration system is made up of two kinds of working medium, and high-temperature level refrigeration system uses high temperature refrigerant, and low-temperature level is freezed System uses cryogenic fluid.But owing to cryogenic fluid is the most in a supercritical state, generally at low temperature Level refrigeration system in set expansion vessel, system complex and be difficulty with become working medium flow control.
Utility model content
This utility model is to overcome defect of the prior art, it is provided that answering of a kind of multi-machine heads either simplex matter Folded cooling cycle system, in order to improve cascade refrigeration system efficiency, simultaneously for the working medium stream of refrigeration system Amount can be adjusted.
This utility model is achieved through the following technical solutions:
A kind of variable-flow either simplex matter common condenser and the cascade refrigeration system of vaporizer, freeze including multiple stage Compressor bank, condenser, condenser/evaporator, vaporizer, high-temperature level choke valve and low-temperature level choke valve, Every refrigeration compressor set by refrigeration compressor, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, 4th electromagnetic valve composition, the exhaust end of refrigeration compressor connects the first electromagnetic valve and the second electromagnetic valve respectively, The suction end of every refrigeration compressor connects the 3rd electromagnetic valve and the 4th electromagnetic valve, every refrigerant compression respectively The first electromagnetic valve connected on machine is connected with the import of condenser, on every refrigeration compressor after being connected in parallel It is connected with condenser/evaporator condensation side import, on every refrigeration compressor after the second electromagnetic valve parallel connection connected It is connected, on every refrigeration compressor with the outlet of condenser/evaporator evaporation side after the 3rd electromagnetic valve parallel connection connected It is connected with the outlet of vaporizer after the 4th electromagnetic valve parallel connection connected;The outlet of condenser throttles through high-temperature level Valve is connected with condenser/evaporator evaporation side import, and condenser/evaporator condensation side exports by low-temperature level choke valve It is connected with evaporator.
When refrigeration compressor is as high-temperature level refrigeration system compressors, the first electromagnetic valve and the 3rd electromagnetic valve Open, the second electromagnetic valve and the 4th closed electromagnetic valve, by the after now working medium is compressed by refrigeration compressor One electromagnetic valve enters in condenser and condenses, and condensed working medium enters condensation through the throttling of high-temperature level choke valve and steams Send out in device and evaporate, absorb the condensation heat of low-temperature level, then return to compressor through the 3rd electromagnetic valve;Work as refrigeration When compressor is as low-temperature level refrigeration system compressor, the second electromagnetic valve and the 4th electromagnetic valve are opened, and first Electromagnetic valve and the 3rd closed electromagnetic valve, now refrigeration compressor is entered by the second electromagnetic valve after working medium being compressed Enter in condenser/evaporator condense, to high-temperature level dispel the heat, condensed working medium through low-temperature level choke valve throttle into Enter in vaporizer and evaporate, produce refrigeration phenomenon, then return to compressor through the 4th electromagnetic valve.
Described refrigeration compressor is screw compressor, rotor compressor, helical-lobe compressor, piston compressor In or any one of other pattern refrigeration compressor, variable-flow mode is entered by AC frequency conversion or DC frequency-changing Row regulation, it is possible to use working medium unloading and load mode to realize the Flow-rate adjustment of working medium.
Described condenser is air-cooled condenser, water-cooled condenser or evaporative condenser.
Described condenser/evaporator is plate type heat exchanger or double pipe heat exchanger.
Described vaporizer is air-cooled, solution refrigerating formula.
Described high-temperature level choke valve and low-temperature level choke valve are electric expansion valve, heating power expansion valve, capillary tube Or throttle orifice plate apparatus.
Described electromagnetic valve can be replaced by hand stop valve, ball valve etc..
Compared with prior art, the beneficial effects of the utility model are:
1, system is flexible: the refrigeration compressor in cascade refrigeration system of the present utility model all can be by inhaling Being turned on and off of gas end and exhaust end electromagnetic valve realizes high-temperature level refrigeration compressor and low-temperature level refrigerant compression The mutual conversion of machine, i.e. arbitrary refrigeration compressor in system can serve as high-temperature level refrigeration compressor Or low-temperature level refrigeration compressor uses, it is simple to carry out inter-stage energy adjustment.
2, system is simple: cascade refrigeration system of the present utility model is made up of either simplex matter, without expansion capacity The devices such as device, system structure is simple.
3, efficiency is high: become working medium flow mode realize controlling owing to using, high-temperature level refrigeration system and low Temperature level refrigeration system working medium flow reasonable mixture ratio, system effectiveness is high.
4, compressor problem of oil return is solved: this utility model high-temperature level refrigeration system with low-temperature level refrigeration is System isolation, solves the oil return inequality problem occurred when using two-stage compression cycle system.
Accompanying drawing explanation
Fig. 1 show this utility model variable-flow either simplex matter common condenser and the cascade refrigeration system of vaporizer System schematic diagram.
In figure: 1. refrigeration compressor, 2-1. the first electromagnetic valve, 2-2. the second electromagnetic valve, 2-3. the 3rd electricity Magnet valve, 2-4. the 4th electromagnetic valve, 3. condenser, 4-1. high-temperature level choke valve, 4-2. low-temperature level choke valve, 5. condenser/evaporator, 6. vaporizer.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in detail.
Embodiment 1
Fig. 1 is that variable-flow either simplex matter common condenser of the present utility model, vaporizer cascade refrigeration system show It is intended to, by multiple stage refrigeration compressor 1, condenser 3, condenser/evaporator 5, vaporizer 6, high-temperature level joint Stream valve 4-1 and low-temperature level choke valve 4-2 composition, the exhaust end of every described refrigeration compressor 1 connects respectively Being connected to the first electromagnetic valve 2-1 and the second electromagnetic valve 2-2, the suction end of every described refrigeration compressor 1 divides Lian Jie there is not the 3rd electromagnetic valve 2-3 and the 4th electromagnetic valve 2-4, every described refrigeration compressor 1 connects Described first electromagnetic valve 2-1 be connected in parallel after be connected with the import of described condenser 3, every described system With described condenser/evaporator 5 condensation side after the described second electromagnetic valve 2-2 parallel connection connected in cold compressor 1 Import connects, with institute after the described 3rd electromagnetic valve 2-3 parallel connection that every described refrigeration compressor 1 connects State the outlet of condenser/evaporator 5 evaporation side to connect, the described 4th that every described refrigeration compressor 1 connects After electromagnetic valve 2-4 parallel connection, the outlet with described vaporizer 6 is connected;The outlet of described condenser 3 is through described High-temperature level choke valve 4-1 is connected with described condenser/evaporator 5 evaporation side import, described condenser/evaporator 5 Condensation side outlet is connected with the import of described vaporizer 6 by described low-temperature level choke valve 4-2.
Described first electromagnetic valve 2-1 and described 3rd electromagnetic valve 2-3 when the connection of described refrigeration compressor 1 Open, when described second electromagnetic valve 2-2 and described 4th electromagnetic valve 2-4 closes, described refrigeration compressor 1 high-temperature level that system is cascade refrigeration system connected, working medium is compressed by the most described refrigeration compressor 1 Condense by described first electromagnetic valve 2-1 to described condenser 3, through described high-temperature level choke valve 4-1 Enter after throttling in described condenser/evaporator 5 and evaporate, absorb the condensation heat of low-temperature level, the working medium after evaporation Return in described refrigeration compressor 1 through described 3rd electromagnetic valve 2-3;When described refrigeration compressor 1 connects Described second electromagnetic valve 2-2 and described 4th electromagnetic valve 2-4 open, described first electromagnetic valve 2-1 and When described 3rd electromagnetic valve 2-3 closes, the system that described refrigeration compressor 1 connects is cascade refrigeration system Low-temperature level, the most described refrigeration compressor 1 by working medium compress after through described second electromagnetic valve 2-2 to institute State in condenser/evaporator 5 and condense, dispel the heat to high-temperature level, laggard through described low-temperature level choke valve 4-2 throttling Enter in described vaporizer 6 and evaporate, produce refrigeration phenomenon, then return to system through described 4th electromagnetic valve 2-4 In cold compressor 1.
This utility model embodiment only lists the cascade refrigeration system of common condenser and vaporizer, Actual application can use common condenser, parallel evaporator cascade refrigeration system and parallel condensing device, Share vaporizer cascade refrigeration system.
The variable-flow either simplex arbitrary compressor of matter cascade refrigeration system of the present utility model all can be cut by valve Change into as high-temperature level refrigeration system or low-temperature level refrigeration system compressor, and can by the start-stop of compressor or Motor frequency conversion realizes high-temperature level refrigeration system or the changes in flow rate of low-temperature level refrigeration system.
Variable-flow either simplex matter cascade refrigeration system of the present utility model is when specifically using, and refrigeration compressor can Partly or entirely use fixed frequency refrigeration compressor, to reduce investment.
The above is only preferred implementation of the present utility model, it is noted that for this technology For the those of ordinary skill in field, on the premise of without departing from this utility model principle, it is also possible to make Some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.

Claims (6)

1. a variable-flow either simplex matter common condenser and the cascade refrigeration system of vaporizer, it is characterised in that Including multiple stage refrigeration compressor set, condenser, condenser/evaporator, vaporizer, high-temperature level choke valve and low Temperature level choke valve, every refrigeration compressor set by refrigeration compressor, the first electromagnetic valve, the second electromagnetic valve, 3rd electromagnetic valve, the 4th electromagnetic valve composition, the exhaust end of refrigeration compressor connect respectively the first electromagnetic valve and Second electromagnetic valve, the suction end of every refrigeration compressor connects the 3rd electromagnetic valve and the 4th electromagnetic valve respectively, The first electromagnetic valve connected on every refrigeration compressor is connected with the import of condenser after being connected in parallel, every It is connected with condenser/evaporator condensation side import after the second electromagnetic valve parallel connection connected on refrigeration compressor, every It is connected with the outlet of condenser/evaporator evaporation side after the 3rd electromagnetic valve parallel connection connected on refrigeration compressor, every It is connected with the outlet of vaporizer after the 4th electromagnetic valve parallel connection connected on refrigeration compressor;The outlet of condenser Being connected with condenser/evaporator evaporation side import through high-temperature level choke valve, the outlet of condenser/evaporator condensation side is passed through Low-temperature level choke valve is connected with evaporator.
Variable-flow either simplex matter common condenser the most according to claim 1 and the cascade refrigeration of vaporizer System, it is characterised in that described refrigeration compressor is screw compressor, rotor compressor, screw compression Machine or piston compressor.
Variable-flow either simplex matter common condenser the most according to claim 1 and the overlapping system of vaporizer Cooling system, it is characterised in that described condenser is air-cooled condenser, water-cooled condenser or evaporating type condensing Device.
Variable-flow either simplex matter common condenser the most according to claim 1 and the overlapping system of vaporizer Cooling system, it is characterised in that described condenser/evaporator is plate type heat exchanger or double pipe heat exchanger.
Variable-flow either simplex matter common condenser the most according to claim 1 and the overlapping system of vaporizer Cooling system, it is characterised in that described vaporizer is air-cooled or solution refrigerating formula.
Variable-flow either simplex matter common condenser the most according to claim 1 and the overlapping system of vaporizer Cooling system, it is characterised in that described high-temperature level choke valve and low-temperature level choke valve are electric expansion valve, heat Power expansion valve, capillary tube or throttle orifice plate apparatus.
CN201620390607.XU 2016-05-03 2016-05-03 Cascade refrigeration system of unsteady flow volume simplex matter sharing condenser and evaporimeter Expired - Fee Related CN205641653U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105758047A (en) * 2016-05-03 2016-07-13 天津商业大学 Variable-flow single-working medium cascade refrigeration system with common condenser and common evaporator
CN108332443A (en) * 2018-03-21 2018-07-27 天津商业大学 The refrigeration system of variable-flow single stage compress cycle and cascade cycle can be achieved

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105758047A (en) * 2016-05-03 2016-07-13 天津商业大学 Variable-flow single-working medium cascade refrigeration system with common condenser and common evaporator
CN105758047B (en) * 2016-05-03 2019-01-22 天津商业大学 The cascade refrigeration system of variable-flow either simplex matter common condenser and evaporator
CN108332443A (en) * 2018-03-21 2018-07-27 天津商业大学 The refrigeration system of variable-flow single stage compress cycle and cascade cycle can be achieved
CN108332443B (en) * 2018-03-21 2024-01-19 天津商业大学 Refrigerating system capable of realizing variable flow single-stage compression cycle and cascade cycle

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20161012

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