CN110207414A - Self-cascade refrigeration system, drying device with same and operation method - Google Patents
Self-cascade refrigeration system, drying device with same and operation method Download PDFInfo
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- CN110207414A CN110207414A CN201910555825.2A CN201910555825A CN110207414A CN 110207414 A CN110207414 A CN 110207414A CN 201910555825 A CN201910555825 A CN 201910555825A CN 110207414 A CN110207414 A CN 110207414A
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- water
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- condenser
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 61
- 238000001035 drying Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 233
- 238000009835 boiling Methods 0.000 claims description 69
- 239000003507 refrigerant Substances 0.000 claims description 68
- 239000006200 vaporizer Substances 0.000 claims description 65
- 238000001704 evaporation Methods 0.000 claims description 36
- 230000008020 evaporation Effects 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 claims description 30
- 238000009833 condensation Methods 0.000 claims description 24
- 230000005494 condensation Effects 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 6
- 230000006837 decompression Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007791 dehumidification Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 206010016326 Feeling cold Diseases 0.000 claims 1
- 238000005485 electric heating Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/02—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in buildings
-
- 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
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- 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
- F25B2600/2513—Expansion valves
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to a self-cascade refrigeration system, in particular to a self-cascade refrigeration system for a drying device and an operation method. The refrigeration system comprises a compressor, a condenser, a separation device, a first throttling device, an evaporative condenser, a liquid storage device, a second throttling device, a low-temperature evaporator, a high-temperature evaporator and other refrigeration equipment and a valve assembly, and can simplify the characteristics of the self-cascade system, simplify the system setting and realize the separation, storage, capacity adjustment and efficient operation of components at different operation temperature stages through the control of the valve assembly.
Description
Technical field
The present invention relates to a kind of auto-cascading refrigeration system, especially a kind of auto-cascading refrigeration system and fortune for drying device
Row method.
Background technique
When carrying out dry materials using Refrigeration Technique, if drying temperature is higher than 80 DEG C, using regular air source heat pump (CO2
Except heat pump) it cannot achieve efficient operation under big temperature rise, it is generally recycled at this time using autocascade cycle or multi-stage compression.Overlapping heat
Pump is connected two heat pump systems by condenser/evaporator, and in the case where meeting big temperature condition, high heat supply temperature demand is same
When, solve the problems such as multi-stage compression system difficult design that may be present, compressor oil equalization is difficult.
Patent CN103940156B gives a kind of control method of overlapping Analysis of Heat Pump Drying System, by detecting environment temperature
Determine system running pattern.But overlapping heat pump needs two sets of independent circulatory systems, system structure is complicated, and initial cost also can
It is bigger.Auto cascade cycle is grown up on the basis of autocascade cycle, its main feature is that using set of system, a compression
The temperature glide and Component Separation Performance of Ternary of non-azeotropic refrigerant is utilized in machine.
Patent CN205561339U, which is proposed, is applied to drying or heating for auto-cascading refrigeration system, solves single stage compress system
Problem of the big temperature of system across performance difference under, high pressure ratio.But since non-azeotropic refrigerant different component physical difference is larger, permitting
Perhaps within the scope of operating condition, requirement of the different constituent elements to system unit is different, such as its room temperature of high boiling constituent element or low temperature specific volume
Larger, the requirement participated in when system is run to compressor displacement is larger.Therefore, auto-cascading refrigeration system for heat supply (drying or
Heating) when, it is necessary to constituent element separation, the storage of different running temperature stage different characteristics are resolved, to realize the capacity tune of system
Section and efficient operation.
There is the problems such as structure is complicated, and adjusting is difficult, initial cost is big in prior art overlapping heat pump system.
Summary of the invention
In consideration of it, the present invention proposes that one kind can simplify Auto-cascade cycle system performance and simplify system setting, and it is able to achieve difference
The separation of the component in running temperature stage, storage, capacity regulating and efficient operation auto-cascading refrigeration system.
A kind of dry operation method of auto-cascading refrigeration system, auto-cascading refrigeration system use binary non-azeotropic refrigerant,
Formation includes compressor, condenser, separator, first throttling device, evaporative condenser, device for storing liquid, the second throttling dress
It sets, the refrigeration system of cryogenic vaporizer, high-temperature evaporator；
When drying needs room temperature to run, binary non-azeotropic refrigerant enters separator from condenser condensation heat release: point
The high boiling component feeding device for storing liquid after first throttling device, evaporative condenser evaporation wing passage that is rich in separated out is stored in
Wherein；That isolates is sent into evaporative condenser condensation wing passage rich in low boiling component, condenses wing passage stream from evaporative condenser
Compressor is returned followed by second throttling device and cryogenic vaporizer again after out, is sent into condensation again after compressor compresses
Device condenses heat release, so recycles；When drying needs hot operation, binary non-azeotropic refrigerant enters from condenser condensation heat release
Separator: that isolates enters high-temperature evaporator through first throttling device rich in high boiling component, absorbs heat from high-temperature evaporator
Compressor is returned again to afterwards；Entering in cryogenic vaporizer and its connecting line rich in low boiling component for making to isolate condenses, and
It is stored therein in.
It is further preferred that when it is dry need medium temperature to run when, binary non-azeotropic refrigerant from condenser condense heat release into
After entering separator: that isolates from separator enters first throttling device decompression rich in high boiling component；From separator
That isolates is rich in low boiling component followed by second throttling device and cryogenic vaporizer, then drops with through first throttling device
Evaporating rich in the evaporation side for entering evaporator-condenser after high boiling component mixing for pressure, then returns to compressor through device for storing liquid
Suction inlet.
The present invention also provides a kind of auto-cascading refrigeration systems, have compressor, condenser, separator, first throttle dress
It sets, evaporative condenser, device for storing liquid, second throttling device, cryogenic vaporizer, high-temperature evaporator；Wherein compressor air-discharging exports
It is connected with condenser inlet, condensator outlet is connected with separator entrance；Separator means liquid outlet and first throttle
Device portal is connected；Two branches of first throttling device outlet connection, a branch are that evaporative condenser connects branch, are connected to
Between first throttling device outlet and evaporative condenser evaporation side entrance；Another branch is high-temperature evaporator heat exchange branch, connection
Between first throttling device outlet and compressor air suction pipeline entrance, high-temperature evaporator heat exchange branch road is connected with high temperature evaporation
Device；The evaporation side outlet of evaporative condenser is connected with device for storing liquid entrance, and device for storing liquid outlet enters with compressor air suction pipeline
Mouth is connected；
The gas vent of separator is connected with the condensation side entrance of evaporative condenser, and the condensation side of evaporative condenser goes out
Mouth is connected with second throttling device, and second throttling device is connected with cryogenic vaporizer entrance, cryogenic vaporizer outlet connection
Cryogenic vaporizer first connects branch, and cryogenic vaporizer first connects the branch other end and is connected with compressor air suction pipeline entrance
It connects；It is provided with the first control valve on runner between compressor air suction pipeline entrance and device for storing liquid outlet, in first throttle
Evaporative condenser connection branch the second control valve of road setting between device outlet and evaporative condenser evaporation side entrance, first
High-temperature evaporator heat exchange branch road between throttling set outlet and the first compressor air suction pipeline entrance is provided with third control
Valve, the cryogenic vaporizer first between cryogenic vaporizer outlet and compressor air suction pipeline entrance, which connects, is provided with the on branch road
Five control valves.
Above-mentioned preferable, cryogenic vaporizer outlet is also connected with to be in series with the cryogenic vaporizer second of the 4th control valve company
Branch is connect, cryogenic vaporizer second connects the branch other end and is connected with the evaporation side entrance of evaporative condenser.
It is above-mentioned preferable, increase subcooler in the separator, the subcooler is arranged in the evaporative condenser
On runner between the evaporation side outlet and device for storing liquid entrance of device, and it is located at the inner upper space of separator, for cold
The solidifying high boiling component rich in low boiling component refrigerant gas.
It is above-mentioned preferable, increase four-way reversing valve, so that between separator and evaporative condenser condensation side entrance
Increase by the 6th control valve；There are four ports, i.e. first port, second port, third port, the 4th end for the four-way reversing valve tool
Mouthful, wherein first port is connect with compressor suction port, the entrance connection of second port and high-temperature evaporator, third port and pressure
The exhaust outlet of contracting machine connects, and the entrance of the 4th port and condenser connects.
It is above-mentioned preferable, increase low pressure receiver device in cryogenic vaporizer outlet side, so that refrigerant is from low-temperature evaporation
Device is introduced into low pressure receiver device after coming out, then is sent to cryogenic vaporizer second and connects branch or the connection of cryogenic vaporizer first
Branch.
It is above-mentioned preferable, the separator is changed to rectifier unit, and rectifier unit bottom increase auxiliary plus
Thermal, the assisted heating device are electric heater unit or refrigerant condenser coil.
Above-mentioned preferable, condenser and high-temperature evaporator are all made of water-refrigerant heat exchanger.
Above-mentioned preferable, the condenser and high-temperature evaporator are using water-refrigerant pattern heat exchange；Increase by the first heat exchange
Device, the second heat exchanger, the first main-supply, the second main-supply, the first main water return tube, the second main water return tube, First Heat Exchanger
Water supply branch, the second heat exchanger water supply branch, First Heat Exchanger return water branch, the second heat exchanger return water branch, in which: described
One heat exchanger entrance connects First Heat Exchanger water supply branch, and the entrance of First Heat Exchanger water supply branch is connected in parallel First Heat Exchanger
First water supply branch and First Heat Exchanger the second water supply branch, wherein the first water supply of First Heat Exchanger branch is connected to the first main confession
On water pipe, First Heat Exchanger the second water supply branch is connected on the second main-supply；First Heat Exchanger outlet connection first
Heat exchanger return water branch, the outlet of First Heat Exchanger return water branch two return water branches in parallel, wherein First Heat Exchanger first returns
Water branch is connected on the first main water return tube, and First Heat Exchanger the second return water branch is connected on the second main water return tube；Described
Two heat exchanger entrances connect the second heat exchanger water supply branch, and the entrance of the second heat exchanger water supply branch is connected in parallel the second heat exchanger
First water supply branch and second heat exchanger the second water supply branch, wherein second heat exchanger the first water supply branch is connected to the first main confession
On water pipe, second heat exchanger the second water supply branch is connected on the second main-supply；The second heat exchanger exit connection second
Heat exchanger return water branch, the outlet of the second heat exchanger return water branch two return water branches in parallel, wherein the second heat exchanger first returns
Water branch is connected on the first main water return tube, and second heat exchanger the second return water branch is connected on the second main water return tube；Described
One main-supply is connected to the entrance of high-temperature evaporator water flow passage；First main water return tube is connected to high-temperature evaporator water flow passage
Outlet；Second main-supply is connected to the entrance of Water in Condenser runner；Second main water return tube is connected to condenser
The outlet of water flow passage.
Above-mentioned preferable, condenser and high-temperature evaporator are all made of water-refrigerant heat exchanger.The First Heat Exchanger supplies
First Heat Exchanger is formed between water branch and First Heat Exchanger return water branch for return water branch connecting passage, is provided on the runner
First flow regulating valve；The confession of the second heat exchanger is formed between the second heat exchanger water supply branch and the second heat exchanger return water branch
Return water branch connecting passage is provided with second flow regulating valve on the runner；First Heat Exchanger the first return water branch is equipped with first
Water valve, the second return water of First Heat Exchanger branch road are equipped with the second water valve, the first water supply of First Heat Exchanger branch road is equipped with third water
Valve, the second water supply of First Heat Exchanger branch road are equipped with the 4th water valve, the first return water of the second heat exchanger branch road is equipped with the 5th
Water valve, the second the second return water of heat exchanger branch road are equipped with the 6th water valve, the first water supply of the second heat exchanger branch road is equipped with the
Seven water valves, second the second water supply of heat exchanger branch road are equipped with the 8th water valve；In first main-supply and/or the first main return water
Pipe is equipped with the first water pump, and the first water pump is equipped on second main-supply and/or the second main water return tube.
Above-mentioned preferable, wherein First Heat Exchanger and the second heat exchanger are arranged on drying shed top, in First Heat Exchanger
And second be provided with circulating fan between heat exchanger, by the switching control of the first~the 8th water valve meet circulating fan rotate forward and
The dehumidifying of difference wind direction, heating requirements when reversion realize the by the control of first flow regulating valve and second flow regulating valve
The control of water temperature in one heat exchanger and the second heat exchanger.
Above-mentioned preferable, the described first~the 5th control valve is all made of shut-off valve；First~the second throttling device
It is all made of electric expansion valve.
Above-mentioned preferable, the auto-cascading refrigeration system is self-cascade heat pump system.
A kind of operation method for auto-cascading refrigeration system described in any of the above embodiments, it is characterised in that: including room temperature
Operational mode, medium temperature operational mode and hot operation mode, in which: when room temperature is run, third valve, the 4th valve are closed, and make first
The refrigerant gas of compressor discharge condenses heat release within the condenser, and high boiling component first condenses, then the gas-liquid of certain mass dryness fraction
Mixture enters separator, flows out rich in high boiling refrigerant liquid through the liquid outlet of separator, through first throttle
The vaporizer side for entering evaporative condenser after device reducing pressure by regulating flow enters device for storing liquid after being evaporated to gas, and the first valve slowly closes
It closes, makes slowly to be stored in device for storing liquid rich in high boiling component；Gas vent outflow through separator is rich in low boiling point
The gas of component is condensed into liquid in the condenser side of evaporative condenser, then enters after second throttling device reducing pressure by regulating flow low
Then evaporation endothermic in warm evaporator returns to the first compressor air suction entrance through the 5th valve；When medium temperature is run, third valve, the 5th
Valve is closed；The refrigerant gas of first compressor discharge condenses heat release within the condenser, and high boiling component first condenses, then centainly
The gas-liquid mixture of mass dryness fraction enters separator, flows out rich in high boiling refrigerant liquid through the liquid outlet of separator,
Through first throttling device reducing pressure by regulating flow, flowed out rich in low-boiling refrigerant gas through the gas vent of separator, through evaporating
The condensation side of condenser condenses heat release, then enters cryogenic vaporizer after second throttling device reducing pressure by regulating flow and evaporates, then with
The evaporation side for entering evaporative condenser after the mixing of the component of throttling set reducing pressure by regulating flow is evaporated, then through device for storing liquid, first
Valve returns to the first compressor air suction entrance；When hot operation, the first valve, the second valve, the 4th valve and the 5th valve are closed；First compression
The refrigerant gas of machine discharge condenses heat release within the condenser, and high boiling component first condenses, then the gas-liquid mixed of certain mass dryness fraction
Object enters separator, and the refrigerant liquid rich in high boiling component is flowed out through the liquid outlet of separator, through first throttle
Enter evaporation endothermic in high-temperature evaporator through third valve after device reducing pressure by regulating flow, then returns to compressor air suction entrance；At this point, low
Warm evaporator local environment temperature is low, and the refrigerant gas rich in low boiling component is slowly migrated from the gas vent of separator
It condenses, and is stored therein in into cryogenic vaporizer and its connecting line.
Above-mentioned auto-cascading refrigeration system and its operation method, drying device are preferable, and refrigerant is binary non-azeotrope system
The boiling temperature of cryogen, two kinds of constituent elements differs 10 DEG C or more, and the critical-temperature of higher boiling refrigerant is low between 80 DEG C~200 DEG C
The critical-temperature of boiling point refrigerant is between 30 DEG C~120 DEG C.
The present invention simplifies system using Auto-cascade cycle system performance and is arranged as a result,；It is separated using the component of non-azeotropic refrigerant
Characteristic realizes separation, the storage of the component in different running temperature stages, realizes the appearance of system by combining the on-off of shut-off valve
Amount adjusts and efficient operation.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, above and other target, feature and the advantage of the disclosure will
It becomes more fully apparent.Drawings discussed below is only some embodiments of the present disclosure, for the ordinary skill of this field
For personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is 1 auto-cascading refrigeration system figure of the embodiment of the present invention；
Fig. 2 is the drying device embodiment schematic diagram using 1 auto-cascading refrigeration system of the embodiment of the present invention；
Fig. 3 is 2 auto-cascading refrigeration system figure of the embodiment of the present invention；
Fig. 4 is 3 auto-cascading refrigeration system figure of the embodiment of the present invention；
Fig. 5 is 4 auto-cascading refrigeration system figure of the embodiment of the present invention；
Fig. 6 is 5 auto-cascading refrigeration system figure of the embodiment of the present invention；
Fig. 7 is 6 auto-cascading refrigeration system figure of the embodiment of the present invention；
Fig. 8 is the drying device embodiment schematic diagram that the present invention uses 6 auto-cascading refrigeration system of embodiment.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning, " a variety of " generally comprise at least two, but not
It excludes to include at least one situation.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include, so that commodity or system including a series of elements not only include those elements, but also including not clear
The other element listed, or further include for this commodity or the intrinsic element of system.In the feelings not limited more
Under condition, the element that is limited by sentence "including a ...", it is not excluded that in the commodity or system for including the element also
There are other identical elements.
The present invention proposes that one kind can simplify Auto-cascade cycle system performance and simplify system setting, and is able to achieve different running temperatures
The separation of the component in stage, storage, capacity regulating and efficient operation auto-cascading refrigeration system.
[auto-cascading refrigeration system and its drying device]
Implement 1:
As shown in Figs. 1-2, a kind of auto-cascading refrigeration system has binary non-azeotropic refrigerant, the boiling point temperature of two kinds of constituent elements
10 DEG C of degree difference or more, between 80 DEG C~200 DEG C, the critical-temperature of low boiling point refrigerant is situated between for the critical-temperature of higher boiling refrigerant
In 30 DEG C~120 DEG C.It is specific to may be selected to use R32, R134a, R290, R1234ze (E), R1234ze (Z), R1233zd
(E), the binary non-azeotropic refrigerant of the compositions such as R245fa.
As shown in Figure 1, the auto-cascading refrigeration system has compressor 101, condenser 102, separator 103, first segment
Flow device 110, evaporative condenser 105, device for storing liquid 104, second throttling device 106, cryogenic vaporizer 107, high-temperature evaporator
112；
Wherein compressor air-discharging outlet is connected with 102 import of condenser, and the outlet of condenser 102 enters with separator 103
Mouth 103c is connected；103 liquid outlet 103b of separator is connected with 110 entrance of first throttling device；First throttling device
110 two branches of outlet connection, a branch are that evaporative condenser 105 connects branch LBA, it is connected to the outlet of first throttling device 110
It is evaporated between the 105c of side entrance with evaporative condenser 105；Another branch is high-temperature evaporator heat exchange branch LBD, it is connected to first segment
It flows between the outlet of device 110 and compressor air suction pipeline entrance D, high-temperature evaporator heat exchange branch LBDOn be connected with high-temperature evaporator
112；The evaporation side outlet 105d of evaporative condenser 105 is connected with 104 entrance of device for storing liquid, the outlet of device for storing liquid 104 and pressure
101 suction pipe L of contracting machineDYEntrance D is connected；
The gas vent 103a of separator 103 is connected with the condensation side entrance (105a) of evaporative condenser 105, evaporation
The condensation side outlet (105b) of condenser 105 is connected with second throttling device 106, second throttling device 106 and low-temperature evaporation
107 entrance of device is connected, and connection cryogenic vaporizer first in the outlet of cryogenic vaporizer 107 connects branch LCD, cryogenic vaporizer first
Connect branch LCDThe other end and 101 suction pipe L of compressorDYEntrance D is connected；
Certainly also preferable, connection two branches of connection in the outlet of cryogenic vaporizer 107 may be implemented with more favorable
Efficient operation under high, medium and low temperature, it may be assumed that cryogenic vaporizer second connects branch LCABranch is connected with cryogenic vaporizer first
LCD, wherein cryogenic vaporizer second connects branch LCAIt is connected with the evaporation side entrance 105c of evaporative condenser 105, low temperature steams
It sends out device first and connects branch LCDWith 101 suction pipe L of compressorDYEntrance D is connected；
The first control valve is provided on runner between 101 suction pipe entrance D of compressor and the outlet of device for storing liquid 104
113, the evaporative condenser between the 105c of side entrance, which is evaporated, in the outlet of first throttling device 110 and evaporative condenser 105 connects branch
Road LBAThe second control valve 109 of upper setting, the height between the outlet of first throttling device 110 and the first compressor air suction pipeline entrance
Warm evaporator heat exchange branch LBDOn be provided with third control valve 111, export C and evaporative condenser 105 in cryogenic vaporizer 107 and steam
The cryogenic vaporizer second sent out between the 105c of side entrance connects branch LCAOn be provided with the 4th control valve 108, in cryogenic vaporizer
Cryogenic vaporizer first between 107 outlet C and 101 suction pipe entrance D of compressor connects branch LCDOn be provided with the 5th control
Valve 114 processed.
Above-described embodiment is preferred, and the first~five control valve preferably uses shut-off valve；First~second throttling device is equal
It is preferred that using electric expansion valve.
Specifically, when embodiment 1 to be used in drying device, as shown in Figure 2, it is only necessary to by above-mentioned 102 He of condenser
High-temperature evaporator 112 is arranged in drying shed, while configuring a blower 120.
Implement 2:
As shown in figure 3, on that basis of example 1, increasing subcooler 115, the subcooler in the separator 103
It is arranged on the runner between the evaporation side outlet 105d of the evaporative condenser 105 and 104 entrance of device for storing liquid, and is located at and divides
Inner upper space from device 103, for condensing the high boiling component being rich in low boiling component refrigerant gas.
Other are the same as embodiment 1.
Embodiment 3:
As shown in figure 4, increasing four-way reversing valve 106 on that basis of example 1, in separator 103 and evaporative condenser
Increase by the 6th control valve 117 between 105 condensations side entrance (105a)；There are four ports, i.e., first for the tool of four-way reversing valve 106
Port 106a, second port 106b, third port 106c, the 4th port 106d, wherein first port 106a and compressor suck
Mouth connection, second port 106b are connect with the entrance of high-temperature evaporator 112, and the exhaust outlet of third port 106c and compressor connects
It connects, the 4th port 106d is connect with the entrance of condenser 102.
Other are the same as embodiment 1.
Thus the present embodiment refrigeration system can allow drying device to think that circulation realizes wind with you by forward circulation
Machine 120 rotate in the forward direction and reverse rotation carries out drying of drying.When running such as room temperature and medium temperature, four-way valve 116 remains powered off shape
State, compressor air-discharging outlet are connected with 102 entrance of condenser.When hot operation, blower 120 is rotated in the forward direction and is reversely rotated:
When blower 120 rotates in the forward direction, four-way valve 116 remains powered off state, and 101 air exit of compressor is connected with 102 entrance of condenser
It connects；When blower 120 reversely rotates, four-way valve 116 must be electric, and 101 air exit of compressor and high-temperature evaporator are exported to connection, this
When the 6th shut-off valve 117 close.
Using the drying device of the embodiment, when high-temperature evaporator and condenser are arranged on drying shed top, in high temperature steaming
It is provided with circulating fan between hair device and condenser, the switching of evaporator and condenser can be achieved by the commutation of four-way valve, it is full
The dehumidifying of difference wind direction, heating requirements when sufficient circulating fan rotates and reverse, while improving and the uniform of drying is implemented to material
Property.
Embodiment 4:
As shown in figure 5, on that basis of example 1, increasing low pressure receiver device 117 in 107 outlet side of cryogenic vaporizer, making
It obtains after refrigerant comes out from cryogenic vaporizer 107 and is introduced into low pressure receiver device 117, then be sent to the connection of cryogenic vaporizer first
Branch LCDOr cryogenic vaporizer second connects branch LCA, so that refrigerant is before being sent into compressor, the non-evaporating completely in the inside
Liquid refrigerant is trapped in low pressure receiver device, on the one hand prevents compressor liquid hammer, on the other hand be used to store it is separated go out
The refrigerant component that mouth comes.
Other are the same as embodiment 1.
Embodiment 5:
As shown in fig. 6, on that basis of example 1, the separator 103 is changed to rectifier unit, and fill in rectifying
Bottom set portion increases assisted heating device 118, and the assisted heating device is electric heater unit or refrigerant condenser coil.As a result,
Greatly ensure that more can be sufficiently separated out rich in low-boiling refrigerant gas from rectifier unit, it is ensured that different boiling
Component separation it is more thorough.
Other are the same as embodiment 1.
Using the drying device of above-described embodiment 1-5 refrigeration system, preferably high-temperature evaporator and condenser is arranged in drying
Room top is provided with circulating fan between high-temperature evaporator and condenser.
Embodiment 6:
As Figure 7-8, condenser 102 and high-temperature evaporator 112 use water-refrigerant pattern on that basis of example 1
Thus heat exchange increases First Heat Exchanger 201, the second heat exchanger 202, the first main-supply L1, the second master on that basis of example 1
Water supplying pipe L2, the first main water return tube H1, the second main water return tube H2,201 water supply branch of First Heat Exchanger, the second heat exchanger 202 supply
Water branch, 201 return water branch of First Heat Exchanger, 202 return water branch of the second heat exchanger, in which:
201 entrance of First Heat Exchanger connects 201 water supply branch of First Heat Exchanger, 201 water supply branch of First Heat Exchanger
Entrance be connected in parallel 201 second water supply branch of 201 first water supply branch of First Heat Exchanger and First Heat Exchanger, wherein first changes
Hot 201 first water supply branch of device is connected on the first main-supply L1, and 201 second water supply branch of First Heat Exchanger is connected to second
On main-supply L2；
The outlet of the First Heat Exchanger 201 connection 201 return water branch of First Heat Exchanger, 201 return water branch of First Heat Exchanger
Outlet two return water branches in parallel, wherein 201 first return water branch of First Heat Exchanger is connected on the first main water return tube H1, the
One heat exchanger, 201 second return water branch is connected on the second main water return tube H2；
Second heat exchanger, 202 entrance connects 201 water supply branch of the second heat exchanger, 201 water supply branch of the second heat exchanger
Entrance be connected in parallel 202 second water supply branch of 202 first water supply branch of the second heat exchanger and the second heat exchanger, wherein second changes
Hot 202 first water supply branch of device is connected on the first main-supply L1, and 202 second water supply branch of the second heat exchanger is connected to second
On main-supply L2；
The outlet of the second heat exchanger 202 connection 201 return water branch of the second heat exchanger, 202 return water branch of the second heat exchanger
Outlet two return water branches in parallel, wherein 202 first return water branch of the second heat exchanger is connected on the first main water return tube H1, the
Two heat exchangers, 202 second return water branch is connected on the second main water return tube H2；
The first main-supply L1 is connected to the entrance 112d of high-temperature evaporator water flow passage；The first main water return tube H1
It is connected to the outlet 112c of high-temperature evaporator water flow passage；
The second main-supply L2 is connected to the entrance 102d of Water in Condenser runner；The second main water return tube H2 connection
In the outlet 102c of Water in Condenser runner.
First Heat Exchanger is formed between the First Heat Exchanger water supply branch and First Heat Exchanger return water branch for return water branch
Road connecting passage is provided with first flow regulating valve 221 on the runner；The second heat exchanger water supply branch and the second heat exchanger
The second heat exchanger is formed between return water branch for return water branch connecting passage, is provided with second flow regulating valve 222 on the runner；
201 first return water branch of First Heat Exchanger is equipped with the first water valve 211,201 second return water branch road of First Heat Exchanger is equipped with second
Water valve 212,201 first water supply branch road of First Heat Exchanger are equipped with third water valve 213,201 second water supply branch of First Heat Exchanger
It is equipped with the 4th water valve 214, second heat exchanger, 202 first return water branch road is equipped with the 5th water valve 215, the second heat exchanger
202 second return water branch roads are equipped with the 6th water valve 216, second heat exchanger, 202 first water supply branch road is equipped with the 7th water valve
217,202 second water supply branch road of the second heat exchanger is equipped with the 8th water valve 218；It is main in first main-supply and/or first
Return pipe is equipped with the first water pump 204, and the first water pump 203 is equipped on second main-supply and/or the second main water return tube.
[auto-cascading refrigeration system and its drying device operation method]
Such as Fig. 1-7, on the whole, auto-cascading refrigeration system provided by the invention can at least guarantee under high temperature and low temperature
Multi-component refrigrant be sufficiently separated and from the efficient operation of refrigeration system, i.e.,
When drying needs room temperature to run, binary non-azeotropic refrigerant condenses heat release from condenser 102 and enters separator
103: that isolates is sent into liquid storage after first throttling device 110, evaporative condenser 105 evaporate wing passage rich in high boiling component
Device 104 is stored in wherein；That isolates is sent into the condensation wing passage of evaporative condenser 105 rich in low boiling component, from evaporation
Condenser returns to compressor 101 again after condensing wing passage outflow followed by second throttling device 106 and cryogenic vaporizer 107,
It is sent into condenser 102 again after the compression of compressor 101 and condenses heat release, so recycle；
When drying needs hot operation, binary non-azeotropic refrigerant condenses heat release from condenser 102 and enters separator
103: that isolates enters high-temperature evaporator 112 through first throttling device 110 rich in high boiling component, from high-temperature evaporator 112
Compressor 101 is returned again to after after heat absorption；Make to isolate enters cryogenic vaporizer 107 and its connecting line rich in low boiling component
Middle condensation, and be stored therein in.
, it can also further increase medium temperature operation:
When drying needs medium temperature to run, binary non-azeotropic refrigerant condenses heat release from condenser 102 and enters separator
After 103: that isolates from separator 103 enters the decompression of first throttling device 110 rich in high boiling component；From separator
103 isolate rich in low boiling component followed by second throttling device 106 and cryogenic vaporizer 107, then and through first
What throttling set 110 was depressured evaporates rich in the evaporation side for entering evaporator-condenser after high boiling component mixing, then through liquid storage
Device 104 returns to 101 suction inlet of compressor.
The present invention utilizes the Component Separation Performance of Ternary of non-azeotropic refrigerant, realizes point of the component in different running temperature stages
From, storage, realize the capacity regulating and efficient operation of system.
Specifically, below using the auto-cascading refrigeration system of above-described embodiment 1-5 and drying device embodiment as example, explanation
Its operation method and control:
Embodiment 7:
Preferably dry operation has room temperature operational mode, medium temperature operational mode and hot operation mode to the present embodiment:
When room temperature is run, third valve 111, the 4th valve 108 are closed, and the refrigerant gas that the first compressor 101 is discharged exists
Heat release is condensed in condenser 102, high boiling component first condenses, and then the gas-liquid mixture of certain mass dryness fraction enters separator 103,
It is flowed out rich in high boiling refrigerant liquid through the liquid outlet of separator 103, after 110 reducing pressure by regulating flow of first throttling device
Into the vaporizer side of evaporative condenser 105, enter device for storing liquid 104 after being evaporated to gas, 113 slowly closing of the first valve makes
It is slowly stored in device for storing liquid 104 rich in high boiling component；Gas vent outflow through separator 103 is rich in low boiling point
The gas of component is condensed into liquid in the condenser side of evaporative condenser 105, then after 106 reducing pressure by regulating flow of second throttling device
Into evaporation endothermic in cryogenic vaporizer 107,101 Suction gas inlet of the first compressor then is returned to through the 5th valve 114；
When medium temperature is run, third valve 11, the 5th valve 114 are closed；The refrigerant gas of first compressor 101 discharge is condensing
Heat release is condensed in device 102, high boiling component first condenses, and then the gas-liquid mixture of certain mass dryness fraction enters separator 103, is rich in
High boiling refrigerant liquid is flowed out through the liquid outlet of separator 103, through 110 reducing pressure by regulating flow of first throttling device, is rich in
Low-boiling refrigerant gas is flowed out through the gas vent of separator 103, and the condensation side condensation through evaporative condenser 105 is put
Then heat enters cryogenic vaporizer 107 after 106 reducing pressure by regulating flow of second throttling device and evaporates, then and through 110 section of throttling set
The evaporation side for entering evaporative condenser 105 after the component mixing of stream decompression is evaporated, and is then returned through device for storing liquid 104, the first valve 113
To 101 Suction gas inlet of the first compressor；
When hot operation, the first valve 113, the second valve 109, the 4th valve 108 and the 5th valve 114 are closed；First compressor 101
The refrigerant gas of discharge condenses heat release in condenser 102, and high boiling component first condenses, then the gas-liquid mixed of certain mass dryness fraction
Object enters separator 103, and the refrigerant liquid rich in high boiling component is flowed out through the liquid outlet of separator 103, through the
Enter evaporation endothermic in high-temperature evaporator 112 through third valve 111 after one throttling set, 110 reducing pressure by regulating flow, then returns to compressor
101 Suction gas inlets；At this point, 107 local environment temperature of cryogenic vaporizer is low, the refrigerant gas rich in low boiling component is from separation
The gas vent of device 103 slowly moves to be condensed in cryogenic vaporizer 107 and its connecting line, and is stored therein in.
Embodiment 8:
It can be using exemplified by embodiment 8 for 6 auto-cascading refrigeration system of above-described embodiment and drying device embodiment
Progress control method:
When being applied to drying device using the heat pump drying device that above-mentioned self-cascade heat pump system and water system combine, first
Heat exchanger 201 and the second heat exchanger 201 are arranged on drying shed top, set between First Heat Exchanger 201 and the second heat exchanger 201
It is equipped with circulating fan 200, difference wind direction when circulating fan rotates and reverse is met by the switching control of the first~the 8th water valve
Dehumidifying, heating requirements, First Heat Exchanger is realized by the control of first flow regulating valve 221 and second flow regulating valve 222
201 and second water temperature in heat exchanger 201 control.
When the second water valve 212, the 4th water valve 214, the 5th water valve 215 and the 7th water valve 217 are opened, the first water valve 211, the
When three water valves 2133, the 6th water valve 216 and the 8th water valve 218 are closed, the second heat exchanger 202 is for cool-down dehumidification, the first heat exchange
Device 201 is for heating；When water valve 211, the first water valve 211, third water valve 2133, the 6th water valve 216 and the 8th water valve 218 are opened
When, when the second water valve 212, the 4th water valve 214, the 5th water valve 215 and the 7th water valve 217 are closed, First Heat Exchanger 201 is for removing
Wet cooling, the second heat exchanger 202 are for heating.
The present invention simplifies system using Auto-cascade cycle system performance and is arranged as a result, is separated using the component of non-azeotropic refrigerant
Characteristic realizes separation, the storage of the component in different running temperature stages, realizes the appearance of system by combining the on-off of shut-off valve
Amount adjusts and efficient operation.
It is particularly shown and described the exemplary embodiment of the disclosure above.It should be appreciated that the present disclosure is not limited to
Detailed construction, set-up mode or implementation method described herein；On the contrary, disclosure intention covers included in appended claims
Various modifications and equivalence setting in spirit and scope and it is various understand without departing from art technology it is above-mentioned various in range
Embodiment combination.
Claims (19)
1. a kind of auto-cascading refrigeration system operation method, auto-cascading refrigeration system uses binary non-azeotropic refrigerant, forms packet
Included compressor (101), condenser (102), separator (103), first throttling device (110), evaporative condenser (105),
Device for storing liquid (104), second throttling device (106), the refrigeration system of cryogenic vaporizer (107), high-temperature evaporator (112)；
It is characterized by:
When needing room temperature to run, binary non-azeotropic refrigerant enters separator (103) from condenser (102) condensation heat release:
That isolates is sent into liquid storage after first throttling device (110), evaporative condenser (105) evaporation wing passage rich in high boiling component
Device (104) is stored in wherein；That isolates is sent into evaporative condenser (105) condensation wing passage rich in low boiling component, from
Evaporative condenser returns to pressure again after condensing wing passage outflow followed by second throttling device (106) and cryogenic vaporizer (107)
Contracting machine (101) is sent into condenser (102) condensation heat release again after compressor (101) compression, is so recycled；
When needing hot operation, binary non-azeotropic refrigerant enters separator (103) from condenser (102) condensation heat release:
That isolates enters high-temperature evaporator (112) through first throttling device (110) rich in high boiling component, from high-temperature evaporator
(112) compressor (101) are returned again to after absorbing heat；The low boiling component that is rich in isolated enters cryogenic vaporizer (107) and its connects
Adapter tube condenses in road, and is stored therein in.
2. auto-cascading refrigeration system operation method as described in claim 1, it is characterised in that:
When needing medium temperature to run, binary non-azeotropic refrigerant enters separator (103) from condenser (102) condensation heat release
Afterwards: that isolates from separator (103) enters first throttling device (110) decompression rich in high boiling component；From separator
(103) isolate rich in low boiling component followed by second throttling device (106) and cryogenic vaporizer (107), then with
It is evaporated through the evaporation side being rich in after high boiling component mixes into evaporator-condenser of first throttling device (110) decompression, so
Compressor (101) suction inlet is returned to by device for storing liquid (104).
3. a kind of auto-cascading refrigeration system has compressor (101), condenser (102), separator (103), first throttle dress
Set (110), evaporative condenser (105), device for storing liquid (104), second throttling device (106), cryogenic vaporizer (107), high temperature
Evaporator (112)；
Wherein compressor air-discharging outlet is connected with condenser (102) import, condenser (102) outlet and separator (103)
Entrance (103c) is connected；
Separator (103) liquid outlet (103b) is connected with first throttling device (110) entrance；First throttling device
(110) two branches of outlet connection, a branch are that evaporative condenser (105) connect branch (LBA), it is connected to first throttling device
(110) between outlet and evaporative condenser (105) evaporation side entrance (105c)；Another branch is high-temperature evaporator heat exchange branch
(LBD), it is connected between first throttling device (110) outlet and compressor air suction pipeline entrance (D), high-temperature evaporator heat exchange branch
Road (LBD) on be connected with high-temperature evaporator (112)；The evaporation side outlet (105d) and device for storing liquid of evaporative condenser (105)
(104) entrance is connected, device for storing liquid (104) outlet and compressor (101) suction pipe (LDY) entrance (D) is connected；
The gas vent (103a) of separator (103) is connected with the condensation side entrance (105a) of evaporative condenser (105), steams
The condensation side outlet (105b) of condenser (105) of feeling cold is connected with second throttling device (106), second throttling device (106) with
Cryogenic vaporizer (107) entrance is connected, and connection cryogenic vaporizer first in cryogenic vaporizer (107) outlet connects branch (LCD),
Cryogenic vaporizer first connects branch (LCD) the other end and compressor (101) suction pipe (LDY) entrance (D) is connected；
The first control is provided on runner between compressor (101) suction pipe entrance (D) and device for storing liquid (104) outlet
Valve (113), the evaporation between first throttling device (110) outlet and evaporative condenser (105) evaporation side entrance (105c) are cold
Condenser connects branch (LBA) on the second control valve (109) are set, first throttling device (110) outlet and the first compressor air suction
High-temperature evaporator heat exchange branch (L between entranceBD) on be provided with third control valve (111), in cryogenic vaporizer (107)
The cryogenic vaporizer first exported between (C) and compressor (101) suction pipe entrance (D) connects branch (LCD) on be provided with
Five control valves (114).
4. auto-cascading refrigeration system as claimed in claim 3, it is characterised in that: cryogenic vaporizer (107) outlet also connects
It connects to be in series with the cryogenic vaporizer second of the 4th control valve (108) connection branch (LCA), the cryogenic vaporizer second connects
Branch (LCA) other end is connected with the evaporation side entrance (105c) of evaporative condenser (105).
5. such as the described in any item auto-cascading refrigeration systems of claim 3-4, it is characterised in that: in the separator (103)
Middle increase subcooler (115), evaporation side outlet (105d) and liquid storage of the subcooler setting in the evaporative condenser (105)
On runner between device (104) entrance, and it is located at the inner upper space of separator (103), is rich in low boiling for condensing
High boiling component in point component refrigerants gas.
6. such as the described in any item auto-cascading refrigeration systems of claim 3-4, it is characterised in that: increase four-way reversing valve (106),
So that increasing by the 6th control valve (117) between separator (103) and evaporative condenser (105) condensation side entrance (105a)；
There are four ports, i.e. first port (106a), second port (106b), third port for four-way reversing valve (106) tool
(106c), the 4th port (106d), wherein first port (106a) is connect with compressor suction port, second port (106b) and height
The entrance of warm evaporator (112) connects, and third port (106c) is connect with the exhaust outlet of compressor, the 4th port (106d) with it is cold
The entrance of condenser (102) connects.
7. such as the described in any item auto-cascading refrigeration systems of claim 3-4, it is characterised in that: go out in cryogenic vaporizer (107)
Mouth side increases low pressure receiver device (117), so that refrigerant is introduced into low pressure receiver device after coming out from cryogenic vaporizer (107)
(117)。
8. such as the described in any item auto-cascading refrigeration systems of claim 3-4, it is characterised in that: by the separator (103)
It is changed to rectifier unit, and increases assisted heating device (118) in rectifier unit bottom, the assisted heating device is electric heating
Device or refrigerant condenser coil.
9. such as the described in any item auto-cascading refrigeration systems of claim 3-8, it is characterised in that: condenser (102) and high temperature steam
Device (112) are sent out to be arranged in drying shed.
10. such as the described in any item auto-cascading refrigeration systems of claim 3-4, it is characterised in that: condenser and high-temperature evaporator
It is all made of water-refrigerant heat exchanger.
11. auto-cascading refrigeration system as claimed in claim 10, it is characterised in that: increase First Heat Exchanger (201), second are changed
Hot device (202), the first main-supply (L1), the second main-supply (L2), the first main water return tube (H1), the second main water return tube
(H2), First Heat Exchanger (201) water supply branch, the second heat exchanger (202) water supply branch, First Heat Exchanger (201) return water branch,
Second heat exchanger (202) return water branch, in which:
First Heat Exchanger (201) entrance connects First Heat Exchanger (201) water supply branch, First Heat Exchanger (201) water supply branch
The entrance on road is connected in parallel (201) second water supply branch of (201) first water supply branch of First Heat Exchanger and First Heat Exchanger, wherein
(201) first water supply branch of First Heat Exchanger is connected on the first main-supply (L1), the water supply branch of First Heat Exchanger (201) second
Road is connected on the second main-supply (L2)；
Described First Heat Exchanger (201) outlet connection First Heat Exchanger (201) return water branch, First Heat Exchanger (201) return water branch
The outlet on road two return water branches in parallel, wherein (201) first return water branch of First Heat Exchanger is connected to the first main water return tube
(H1) on, (201) second return water branch of First Heat Exchanger is connected on the second main water return tube (H2)；
Second heat exchanger (202) entrance connects the second heat exchanger (201) water supply branch, the second heat exchanger (201) water supply branch
The entrance on road is connected in parallel (202) second water supply branch of (202) first water supply branch of the second heat exchanger and the second heat exchanger, wherein
(202) first water supply branch of second heat exchanger is connected on the first main-supply (L1), the second heat exchanger (202) second water supply branch
Road is connected on the second main-supply (L2)；
Described second heat exchanger (202) outlet connection the second heat exchanger (201) return water branch, the second heat exchanger (202) return water branch
The outlet on road two return water branches in parallel, wherein (202) first return water branch of the second heat exchanger is connected to the first main water return tube
(H1) on, (202) second return water branch of the second heat exchanger is connected on the second main water return tube (H2)；
First main-supply (L1) is connected to the entrance (112d) of high-temperature evaporator water flow passage；First main water return tube
(H1) it is connected to the outlet (112c) of high-temperature evaporator water flow passage；
Second main-supply (L2) is connected to the entrance (102d) of Water in Condenser runner；Second main water return tube (H2) is even
It connects in the outlet (102c) of Water in Condenser runner.
12. auto-cascading refrigeration system as claimed in claim 11, it is characterised in that: the First Heat Exchanger water supply branch and
First Heat Exchanger is formed between one heat exchanger return water branch for return water branch connecting passage, is provided with first flow tune on the runner
It saves valve (221)；The second heat exchanger is formed for return water between the second heat exchanger water supply branch and the second heat exchanger return water branch
Branch connecting passage is provided with second flow regulating valve (222) on the runner；(201) first return water branch of First Heat Exchanger is set
There are the first water valve (211), (201) second return water branch road of First Heat Exchanger to be equipped with the second water valve (212), First Heat Exchanger
(201) first water supply branch roads are equipped with third water valve (213), (201) second water supply branch road of First Heat Exchanger is equipped with the 4th water
Valve (214), (202) first return water branch road of second heat exchanger are equipped with the 5th water valve (215), the second heat exchanger (202) the
Two return water branch roads are equipped with the 6th water valve (216), (202) first water supply branch road of second heat exchanger is equipped with the 7th water valve
(217), (202) second water supply branch road of the second heat exchanger is equipped with the 8th water valve (218)；In first main-supply and/or
First main water return tube is equipped with the first water pump (204), and first is equipped on second main-supply and/or the second main water return tube
Water pump (203).
13. auto-cascading refrigeration system as claimed in claim 12, it is characterised in that: when the second water valve (212), the 4th water valve
(214), the 5th water valve (215) and the 7th water valve (217) are opened, the first water valve (211), third water valve (2133), the 6th water valve
(216) when and the 8th water valve (218) is closed, the second heat exchanger (202) is for cool-down dehumidification, First Heat Exchanger (201) for adding
Heat；When the first water valve (211), third water valve (213), the 6th water valve (216) and the 8th water valve (218) are opened, the second water valve
(212), when the 4th water valve (214), the 5th water valve (215) and the 7th water valve (217) are closed, First Heat Exchanger (210) is for removing
Wet cooling, the second heat exchanger (202) are for heating.
14. auto-cascading refrigeration system as claimed in claim 13, it is characterised in that: wherein First Heat Exchanger (201) and second
Heat exchanger (201) is arranged on drying shed top, is provided with circulation between First Heat Exchanger (201) and the second heat exchanger (201)
Blower (200), by the switching control of the first~the 8th water valve meet the dehumidifying of difference wind direction when circulating fan rotates and reverse,
Heating requirements realize First Heat Exchanger by the control of first flow regulating valve (221) and second flow regulating valve (222)
(201) control of water temperature and in the second heat exchanger (201).
15. such as the described in any item auto-cascading refrigeration systems of claim 3-14, it is characterised in that: the described first~the 5th control
Valve is all made of shut-off valve；First~the second throttling device is all made of electric expansion valve.
16. a kind of operation method for the described in any item auto-cascading refrigeration systems of claim 3-15, it is characterised in that: packet
Include room temperature operational mode and hot operation mode, in which:
When room temperature is run, third valve (111), the 4th valve (108) are closed, the refrigerant gas that the first compressor (101) are discharged
Heat release is condensed in condenser (102), high boiling component first condenses, and then the gas-liquid mixture of certain mass dryness fraction enters separator
(103), it is flowed out rich in high boiling refrigerant liquid through the liquid outlet of separator (103), through first throttling device (110)
The vaporizer side for entering evaporative condenser (105) after reducing pressure by regulating flow enters device for storing liquid (104) after being evaporated to gas, the first valve
(113) slowly closing makes slowly to be stored in device for storing liquid (104) rich in high boiling component；Gas through separator (103)
The gas rich in low boiling component of outlet outflow is condensed into liquid in the condenser side of evaporative condenser (105), then through the
Enter evaporation endothermic in cryogenic vaporizer (107) after two throttling sets (106) reducing pressure by regulating flow, is then returned to through the 5th valve (114)
First compressor (101) Suction gas inlet；
When hot operation, the first valve (113), the second valve (109), the 4th valve (108) and the 5th valve (114) are closed；First compression
The refrigerant gas of machine (101) discharge condenses heat release in condenser (102), and high boiling component first condenses, then certain mass dryness fraction
Gas-liquid mixture enter separator (103), liquid of the refrigerant liquid rich in high boiling component through separator (103)
Outlet outflow enters evaporation in high-temperature evaporator (112) through third valve (111) after first throttling device (110) reducing pressure by regulating flow
Then heat absorption returns to compressor (101) Suction gas inlet；At this point, cryogenic vaporizer (107) local environment temperature is low, it is rich in low boiling
The refrigerant gas of point component slowly moves to cryogenic vaporizer (107) and its connection from the gas vent of separator (103)
It condenses, and is stored therein in pipeline.
17. the operation method of the auto-cascading refrigeration system such as claim 16, it is characterised in that: when medium temperature is run, third valve
(11), the 5th valve (114) is closed；The refrigerant gas of first compressor (101) discharge condenses heat release in condenser (102),
High boiling component first condenses, and then the gas-liquid mixture of certain mass dryness fraction enters separator (103), is rich in high boiling refrigerant
Liquid is flowed out through the liquid outlet of separator (103), through first throttling device (110) reducing pressure by regulating flow, is rich in low-boiling system
Refrigerant gas is flowed out through the gas vent of separator (103), and the condensation side through evaporative condenser (105) condenses heat release, then
Enter cryogenic vaporizer (107) after second throttling device (106) reducing pressure by regulating flow to evaporate, then be saved with through throttling set (110)
The evaporation side for entering evaporative condenser (105) after the component mixing of stream decompression is evaporated, then through device for storing liquid (104), the first valve
(113) the first compressor (101) Suction gas inlet is returned to.
18. a kind of drying device uses the described in any item auto-cascading refrigeration systems of claim 3-15 or claim 1-
2, the operation method of the described in any item auto-cascading refrigeration systems of 16-17.
19. as described in the described in any item auto-cascading refrigeration systems of claim 3-15 or any one of claim 1-2,16-17
Auto-cascading refrigeration system operation method or claim 18 described in drying device, it is characterised in that: it uses binary non-
Azeotrope refrigerant, and the boiling temperature of two kinds of constituent elements differs 10 DEG C or more, the critical-temperature of higher boiling refrigerant between 80 DEG C~
200 DEG C, the critical-temperature of low boiling point refrigerant is between 30 DEG C~120 DEG C.
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| CN111238072A (en) * | 2020-01-14 | 2020-06-05 | 西安交通大学 | Energy-saving refrigeration system capable of realizing refrigerant switching and working method thereof |
| CN112923680A (en) * | 2021-02-22 | 2021-06-08 | 陕西理工大学 | Air source heat pump drying system capable of operating independently |
| CN114893923A (en) * | 2022-04-16 | 2022-08-12 | 郑州大学 | Working medium component concentration active regulation-based self-overlapping system and control method |
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