CN104930740B - Dual-evaporator refrigeration system - Google Patents

Dual-evaporator refrigeration system Download PDF

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Publication number
CN104930740B
CN104930740B CN201510367396.8A CN201510367396A CN104930740B CN 104930740 B CN104930740 B CN 104930740B CN 201510367396 A CN201510367396 A CN 201510367396A CN 104930740 B CN104930740 B CN 104930740B
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China
Prior art keywords
refrigerant
vaporizer
gas
low pressure
jing
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CN201510367396.8A
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CN104930740A (en
Inventor
周平中
汪瑞东
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BEIJING CTDG AIR CONDITIONING SYSTEM CO., LTD.
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CHINA ICEPOWER ENERGY TECHNOLOGY Co Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezo-electric actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19Pressures
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a dual-evaporator refrigeration system. The system comprises a refrigeration compressor, an oil separator, a condenser, a second evaporator, an ice-making evaporator, a low-pressure circulation barrel, a return oil jet pump and a refrigerant liquid feed pump. A gas outlet of the oil separator is connected to a gas inlet of the condenser, a high-pressure gas inlet of the second evaporator, an ice-shedding gas inlet of the ice-making evaporator, and a gas inlet of the return oil jet pump. A refrigerant outlet of the ice-making evaporator is connected to a gas and liquid inlet of the low-pressure circulation barrel through a refrigerant discharging solenoid valve. An ice-shedding gas outlet of the ice-making evaporator is connected to the gas and liquid inlet of the low-pressure circulation barrel through an ice-shedding hot-gas one-way exhaust valve. According to the invention, the refrigeration system can employ the different evaporators for an ice-making condition and a refrigeration condition, the operating efficiency of the refrigeration system is improved, and the operation cost is saved.

Description

A kind of Dual-evaporator refrigeration system
Technical field
The present invention relates to a kind of refrigeration system, specifically a kind of to ensure system stability and efficiency using two kinds of vaporizers Refrigeration system.
Background technology
At present, board-like ice machine or refrigeration system are using single vaporizer, operating point in air conditioning condition and ice making operating mode Difference causes single evaporator heat exchanger heat exchange area configuration to there is certain difficulty, can not be direct during refrigeration system air conditioning condition Terminad cooling, needs, by intermediate heat transfer process terminad cooling, to cause system stability poor, and refrigeration system efficiency drop It is low.
The content of the invention
For current board-like ice machine or refrigeration system above shortcomings, it is an object of the invention to provide a kind of new Type refrigeration system, realizes air conditioning condition and ice making operating mode using different evaporators, can eliminate single evaporator heat exchange area and match somebody with somebody The problem of hardly possible is put, and improves refrigeration system operation stability and comprehensive energy efficiency.
To achieve these goals, the technical solution used in the present invention is as follows:A kind of Dual-evaporator refrigeration system, including system Cold compressor, oil eliminator, condenser, the second vaporizer, ice making evaporator, low pressure recycle bucket, oil return jet pump and refrigeration Agent solution feed pump;
The gas outlet of the refrigeration compressor is connected with the air inlet of oil eliminator, and the oil return opening Jing of the oil eliminator is oily It is connected with the air entry of refrigeration compressor after separator oil return solenoid valve, its gas outlet air inlet simultaneously with condenser, second The high pressure admission mouth of vaporizer, ice making evaporator deice air inlet and the air inlet of oil return jet pump is connected;Wherein, in oil Hot gas bypass solenoid valve is provided between the high pressure admission mouth of the gas outlet of separator and the second vaporizer, in the outlet of oil eliminator Hot-gas deicing electromagnetic valve is provided between mouth and the air inlet of ice making evaporator, in the gas outlet of oil eliminator and oil return jet pump Injection electromagnetic valve is provided between air inlet;
The refrigerant outlet of the condenser press electric expansion valve in after middle compression refrigerant import with the second vaporizer It is connected, the economizer QI invigorating outlet Jing economizer QI invigorating electromagnetic valves and the economizer QI invigorating interface of refrigeration compressor of the second vaporizer It is connected, its gas returning port Jing the second vaporizer return-air electrodynamic valves are connected with the air entry of refrigeration compressor;Second vaporizer return Hydraulic fluid port Jing the second vaporizer oil return solenoid valves are connected with the ejecting port of oil return jet pump;
Low pressure refrigerant import of the refrigerant outlet of the second vaporizer Jing after Low-voltage Electronic expansion valve with low pressure recycle bucket It is connected;The refrigerant outlet of the low pressure recycle bucket is connected with refrigerant feed liquid pump, and refrigerant feed liquid pump is Jing after feed flow check valve It is connected with the refrigerant inlet of ice making evaporator;The gas returning port of the low pressure recycle bucket Jing after low pressure recycle bucket return-air electrodynamic valve with system The air entry of cold compressor is connected, and its oil return opening Jing low pressure recycle bucket oil return solenoid valves are connected with the ejecting port of oil return jet pump; The outlet of oil return jet pump is connected with the air entry of refrigeration compressor;
Gas-liquid import of the refrigerant outlet of the ice making evaporator Jing after cold-producing medium discharges electromagnetic valve with low pressure recycle bucket It is connected, which is deiced gas outlet and is connected with the gas-liquid import of low pressure recycle bucket Jing after deicing steam one-way exhaust valve.
Further, differential pressure controller is provided with refrigerant feed liquid parallel connection of pumps, for detecting refrigerant feed liquid pump inlet With the pressure reduction of liquid outlet;Feed flow bypass electricity is provided between the gas-liquid import of the liquid outlet and low pressure recycle bucket of refrigerant feed liquid pump Magnet valve.
Further, low pressure recycle bucket liquid level sensor and second are respectively equipped with low pressure recycle bucket and the second vaporizer Vaporizer liquid level sensor.
Further, heat exchanger, the system of condenser are provided between the gas returning port and refrigeration compressor of low pressure recycle bucket Cryogen outlet is also connected to middle pressure electric expansion valve again Jing after heat exchanger is supercool.
Further, the ice making evaporator be multigroup plate-type evaporator or other can be by the vertical evaporation of hot-gas deicing Device.
Further, second vaporizer is the full liquid vaporizer of shell-tube type.
Compared to existing technology, this utility model has the advantages that:Using double evaporators structure(Ice making evaporator and Second vaporizer), air conditioning condition and ice making operating mode can be realized using different evaporators, eliminate single evaporator heat exchange area and match somebody with somebody The problem of hardly possible is put, and further improves refrigeration system operation stability, reduce comprehensive energy efficiency.
Description of the drawings
The Dual-evaporator refrigeration system flow chart of Fig. 1 present invention.
In figure:1-refrigeration compressor, 2-oil eliminator, 3-condenser, the 4-the second vaporizer, 5-ice making evaporator, 6-low pressure recycle bucket, 7-oil return jet pump, 8-refrigerant feed liquid pump, 9-oil eliminator oil return solenoid valve, by 10-steam Three-way electromagnetic valve, 11-hot-gas deicing electromagnetic valve, 12-injection electromagnetic valve, 13-middle pressure electric expansion valve, 14-economizer QI invigorating Electromagnetic valve, the 15-the second vaporizer return-air electrodynamic valve, the 16-the second vaporizer oil return solenoid valve, 17-Low-voltage Electronic expansion valve, 18-feed flow check valve, 19-low pressure recycle bucket return-air electrodynamic valve, 20-low pressure recycle bucket oil return solenoid valve, 21-cold-producing medium row Go out electromagnetic valve, 22-steam one-way exhaust valve is deiced, 23-differential pressure controller, 24-feed flow bypass solenoid valve, 25-low pressure are followed Ring bucket liquid level sensor, the 26-the second vaporizer liquid level sensor.
Specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment:Referring to Fig. 1, a kind of Dual-evaporator refrigeration system, including refrigeration compressor 1, oil eliminator 2, condenser 3rd, the second vaporizer 4, ice making evaporator 5, low pressure recycle bucket 6, oil return jet pump 7 and refrigerant feed liquid pump 8;It is embodied as When, whole system is controlled by system controller.The ice making evaporator 5 be multigroup plate-type evaporator or other can by heat The vertical type evaporator of QI prostration ice;Second vaporizer 4 is the full liquid vaporizer of shell-tube type.
The gas outlet of the refrigeration compressor 1 is connected with the air inlet of oil eliminator 2, the oil return opening of the oil eliminator 2 It is connected with the air entry of refrigeration compressor 1 Jing after oil eliminator oil return solenoid valve 9, gaseous refrigerant Jing refrigeration compressors 1 compress High temperature and high pressure gaseous refrigerant is formed, accessing oil eliminator 2 carries out Oil-gas Separation, detached lubricating oil Jing oil eliminators oil return electricity Magnet valve 9 returns to refrigeration compressor 1.The gas outlet of oil eliminator 2 air inlet simultaneously with condenser 3, the high pressure of the second vaporizer 4 Air inlet, the air inlet for deicing air inlet and oil return jet pump 7 of ice making evaporator 5 are connected.Wherein, in oil eliminator 2 Hot gas bypass solenoid valve 10 is provided between the high pressure admission mouth of gas outlet and the second vaporizer 4, in work, system controller passes through Detect 4 refrigerant pressure of the second vaporizer and control the keying of 4 hot gas bypass solenoid valve 10 of the second vaporizer.In oil eliminator 2 Gas outlet and the air inlet of ice making evaporator 5 between be provided with hot-gas deicing electromagnetic valve 11, the gas outlet of oil eliminator 2 with return Injection electromagnetic valve 12 is provided between the air inlet of oily jet pump 7.So, make the gaseous refrigerant point Jing after oil eliminator 2 is separated Four tunnels:Hot-gas deicing electromagnetic valve 11 is connect all the way in case deicing, and takes back oily jet pump 7 all the way in case injection oil return, accesses all the way Two vaporizers 4 are in case the second vaporizer 4 of protection, is accessed all the way(Water-cooled)Condenser 3 is condensed into liquid refrigerant.
The refrigerant outlet of the condenser 3 press electric expansion valve 13 in after middle compression refrigerant with the second vaporizer 4 Import is connected, and the throttling cooling of electric expansion valve 13 is pressed in the liquid refrigerant Jing that condensed device 3 is pressed in forming high temperature after condensing(Shape Cheng Zhongwen cold-producing mediums)The second vaporizer 4 is entered afterwards.The economizer QI invigorating outlet Jing economizer QI invigorating electromagnetic valves of the second vaporizer 4 14 are connected with the economizer QI invigorating interface of refrigeration compressor 1, and its gas returning port Jing the second vaporizer return-airs electrodynamic valve 15 is pressed with refrigeration The air entry of contracting machine 1 is connected.The second vaporizers of oil return opening Jing oil return solenoid valve 16 and the oil return jet pump 7 of second vaporizer 4 Ejecting port be connected.During air conditioning condition, the second vaporizer 4 is freezed with external agents heat exchange, the gaseous refrigerant formed after evaporation Jing the second vaporizer return-airs electrodynamic valve 15 is back to refrigeration compressor 1, realizes that air conditioner refrigerating is circulated.
The refrigerant outlet of the second vaporizer 4 Jing after Low-voltage Electronic expansion valve 17 with(With liquid storage and gas-liquid separating function 's)The low pressure refrigerant import of low pressure recycle bucket 6 is connected.The refrigerant outlet of the low pressure recycle bucket 6 and refrigerant feed liquid pump 8 It is connected, refrigerant feed liquid pump 8 is connected with the refrigerant inlet of ice making evaporator 5 Jing after feed flow check valve 18;The low pressure recycle bucket 6 Gas returning port be connected with the air entry of refrigeration compressor 1 Jing after low pressure recycle bucket return-air electrodynamic valve 19, its oil return opening Jing low pressure is followed Ring bucket oil return solenoid valve 20 is connected with the ejecting port of oil return jet pump 7;The outlet and refrigeration compressor of the oil return jet pump 7 1 air entry is connected.The refrigerant outlet of the ice making evaporator 5 Jing cold-producing medium discharge electromagnetic valve 21 after with low pressure recycle bucket 6 Gas-liquid import be connected, which deices gas-liquid import phase of the gas outlet Jing after deicing steam one-way exhaust valve 22 with low pressure recycle bucket 6 Even.During ice making operating mode, the second vaporizer return-air electrodynamic valve 15 is closed, and keep the second vaporizer 4 and system being passed through without external agents Cryogen exchanges heat, and makes the middle throttling of temperature cold-producing medium Jing Low-voltage Electronics expansion valve 17 cooling in the second vaporizer 4(Form cryogenic refrigeration Agent)Low pressure recycle bucket 6 is entered afterwards.Low-temperature refrigerant enters ice making evaporator Jing after refrigerant feed liquid pump 8 and feed flow check valve 18 5, with 5 outside medium heat exchange ice making of ice making evaporator;Low-temperature refrigerant forms the cold-producing medium of gas-liquid mixed Jing after evaporator heat exchange Jing after refrigeration discharges electromagnetic valve accessing low pressure recycle bucket 6 carries out gas-liquid separation.Gaseous refrigerant Jing low pressure in low pressure recycle bucket 6 Refrigeration compressor 1 is back to after circulation barrel return-air electrodynamic valve 19, liquid refrigerant continues by cold-producing medium in being stored in low pressure recycle bucket 6 Industrial pumping realizes ice-make cycle to vaporizer.During this, the second vaporizer 4 makees economizer use, and separating of oil rear high temperature is high Compression refrigerant Jing hot gas bypass solenoid valves 10(Judge that hot gas bypass solenoid valve 10 is opened and closed according to unit evaporating pressure, evaporating temperature) After accessing the second vaporizer 4, gaseous refrigerant Jing economizer QI invigorating electromagnetic valve 14 is followed by the economizer QI invigorating of refrigeration compressor 1 Interface.When deicing work, the air inlet that deices of High Temperature High Pressure steam Jing ice making evaporators 5 enters ice making evaporator 5, then from system Deicing after gas outlet is discharged for ice vaporizer 5 is entered in low pressure recycle bucket 6.
It is during actual fabrication, in parallel with refrigerant feed liquid pump 8 to be provided with differential pressure controller 23, for detecting refrigerant feed liquid pump 8 The pressure reduction of inlet and liquid outlet;Confession is provided between the gas-liquid import of the liquid outlet and low pressure recycle bucket 6 of refrigerant feed liquid pump 8 Liquid bypass solenoid valve 24;Cold-producing medium when pressure reduction is relatively low before and after the refrigerant feed liquid pump 8 of the detection of differential pressure controller 23 for control Directly bypass is into gas in 6 excavationg pump of low pressure recycle bucket.
Low pressure recycle bucket liquid level sensor 25 and the second evaporation are respectively equipped with low pressure recycle bucket 6 and the second vaporizer 4 Device liquid level sensor 26.Second vaporizer liquid level sensor 26 and middle pressure electric expansion valve 13 composition 4 liquid level control of the second vaporizer System processed, and control liquid level is adjusted using PID.Low pressure recycle bucket liquid level sensor 25 constitutes low pressure with Low-voltage Electronic expansion valve 17 6 tank level control system of circulation barrel, and control level stability is adjusted using PID.
In the specific implementation, heat exchanger is provided between the gas returning port and refrigeration compressor 1 of low pressure recycle bucket 6, condense The refrigerant outlet of device 3 is also connected to middle pressure electric expansion valve 13 again Jing after heat exchanger is supercool.The heat exchanger is also shell-tube type Heat exchanger, 6 gaseous refrigerant of low pressure recycle bucket are followed by 1 air entry of refrigeration compressor through the heat exchanger heating, condenser 3 Refrigerant outlet liquid refrigerant is also connected to middle pressure electric expansion valve 13 again Jing after heat exchanger is supercool;So as to improve whole system Work efficiency, and reduce operating power consumption.
Wherein, ice making evaporator 5 can be multigroup, can be grouped ice making, deice, do not interfere with each other during ice making.
In whole refrigeration system, three tunnels of oil return blood circulation point:It is that 2 Jing oil return pipes of oil eliminator and oil eliminator are returned all the way Solenoid 9 all works when returning to refrigeration compressor 1, air conditioning condition and ice making operating mode;It is the oil return opening of low pressure recycle bucket 6 all the way The ejecting port of jet pump is accessed, injection pump discharge leads back oil to refrigeration compressor 1, ice making operating mode with communicating after compressor air suction When work;Oil return opening for the second vaporizer 4 accesses phase after the ejecting port of jet pump, injection pump discharge and compressor air suction all the way It is logical oil to be led back to refrigeration compressor 1, work during air conditioning condition.
In the course of work, the flow direction of cold-producing medium is as follows:
1st, air conditioning condition cooling system operation:Refrigeration compressor → oil eliminator → water-cooled condenser → middle pressure electronic expansion Valve → the second vaporizer → the second vaporizer return-air electrodynamic valve → refrigeration compressor.Wherein, Low-voltage Electronic expansion valve, low pressure recycle Bucket, refrigerant feed liquid pump, feed flow check valve, ice making evaporator etc. are not involved in work.
2nd, ice making operating mode cooling system operation:Refrigeration compressor → oil eliminator → water-cooled condenser → middle pressure electronic expansion Valve → the second vaporizer → Low-voltage Electronic expansion valve → low pressure recycle bucket → refrigerant feed liquid pump → feed flow check valve → ice making is steamed Send out device → refrigeration and discharge electromagnetic valve → low pressure recycle bucket → refrigeration compressor.
3rd, deice operation:Refrigeration compressor → oil eliminator → hot-gas deicing electromagnetic valve → ice making evaporator → hot-gas deicing Discharge check valve → low pressure recycle bucket.
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only It is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those skilled in the art exist The every other embodiment obtained under the premise of not making creative work, belongs to the scope of protection of the invention.

Claims (6)

1. a kind of Dual-evaporator refrigeration system, it is characterised in that:Including refrigeration compressor, oil eliminator, condenser, the second evaporation Device, ice making evaporator, low pressure recycle bucket, oil return jet pump and refrigerant feed liquid pump;
The gas outlet of the refrigeration compressor is connected with the air inlet of oil eliminator, and the oil return opening Jing of the oil eliminator is separating of oil It is connected with the air entry of refrigeration compressor after device oil return solenoid valve, its gas outlet air inlet simultaneously with condenser, the second evaporation The high pressure admission mouth of device, ice making evaporator deice air inlet and the air inlet of oil return jet pump is connected;Wherein, separating of oil Hot gas bypass solenoid valve is provided between the high pressure admission mouth of the gas outlet of device and the second vaporizer, the gas outlet of oil eliminator with Hot-gas deicing electromagnetic valve is provided between the air inlet of ice making evaporator, in the air inlet of the gas outlet of oil eliminator and oil return jet pump Injection electromagnetic valve is provided between mouthful;
The refrigerant outlet of the condenser is connected with the middle compression refrigerant import of the second vaporizer after pressing electric expansion valve in, The economizer QI invigorating outlet Jing economizer QI invigorating electromagnetic valves of the second vaporizer are connected with the economizer QI invigorating interface of refrigeration compressor, Its gas returning port Jing the second vaporizer return-air electrodynamic valves are connected with the air entry of refrigeration compressor;The oil return opening Jing of second vaporizer Second vaporizer oil return solenoid valve is connected with the ejecting port of oil return jet pump;
The refrigerant outlet of the second vaporizer is connected with the low pressure refrigerant import of low pressure recycle bucket Jing after Low-voltage Electronic expansion valve; The refrigerant outlet of the low pressure recycle bucket is connected with refrigerant feed liquid pump, refrigerant feed liquid pump Jing after feed flow check valve with ice making The refrigerant inlet of vaporizer is connected;The gas returning port of the low pressure recycle bucket Jing after low pressure recycle bucket return-air electrodynamic valve with refrigerant compression The air entry of machine is connected, and its oil return opening Jing low pressure recycle bucket oil return solenoid valves are connected with the ejecting port of oil return jet pump;Described time The outlet of oily jet pump is connected with the air entry of refrigeration compressor;
The refrigerant outlet of the ice making evaporator is connected with the gas-liquid import of low pressure recycle bucket Jing after cold-producing medium discharges electromagnetic valve, Which is deiced gas outlet and is connected with the gas-liquid import of low pressure recycle bucket Jing after deicing steam one-way exhaust valve.
2. a kind of Dual-evaporator refrigeration system as claimed in claim 1, it is characterised in that:It is provided with refrigerant feed liquid parallel connection of pumps Differential pressure controller, for detecting the pressure reduction of refrigerant feed liquid pump inlet and liquid outlet;Refrigerant feed liquid pump liquid outlet with Feed flow bypass solenoid valve is provided between the gas-liquid import of low pressure recycle bucket.
3. a kind of Dual-evaporator refrigeration system as claimed in claim 1, it is characterised in that:In low pressure recycle bucket and the second evaporation Low pressure recycle bucket liquid level sensor and the second vaporizer liquid level sensor are respectively equipped with device.
4. a kind of Dual-evaporator refrigeration system as claimed in claim 1, it is characterised in that:Low pressure recycle bucket gas returning port with It is provided with heat exchanger between refrigeration compressor, the refrigerant outlet of condenser is also connected to middle piezoelectricity again Jing after heat exchanger is supercool Expansion valve.
5. a kind of Dual-evaporator refrigeration system as claimed in claim 1, it is characterised in that:The ice making evaporator is multigroup plate Formula vaporizer.
6. a kind of Dual-evaporator refrigeration system as claimed in claim 1, it is characterised in that:Second vaporizer is shell-tube type Full liquid vaporizer.
CN201510367396.8A 2015-06-29 2015-06-29 Dual-evaporator refrigeration system Active CN104930740B (en)

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CN106288472B (en) * 2016-09-28 2018-07-06 珠海格力电器股份有限公司 Double evaporators handpiece Water Chilling Units and its oil return method and cold oil method

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US4522037A (en) * 1982-12-09 1985-06-11 Hussmann Corporation Refrigeration system with surge receiver and saturated gas defrost
JP5077089B2 (en) * 2008-06-19 2012-11-21 ダイキン工業株式会社 Refrigeration equipment
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
CN101818958B (en) * 2010-02-11 2012-11-14 中机西南能源科技有限公司 Three-group plate ice machine hot-gas deicing refrigeration system
CN101957113B (en) * 2010-02-11 2013-07-24 中机西南能源科技有限公司 Hot-gas ice-shedding refrigeration system of two-plate ice plate machine
US9696077B2 (en) * 2012-02-21 2017-07-04 Whirlpool Corporation Dual capillary tube / heat exchanger in combination with cycle priming for reducing charge migration
CN204757429U (en) * 2015-06-29 2015-11-11 中机西南能源科技有限公司 Double evaporation ware refrigerating system

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