CN107024033A - A kind of closed type heat pump drying system with dehumidification function - Google Patents
A kind of closed type heat pump drying system with dehumidification function Download PDFInfo
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- CN107024033A CN107024033A CN201710391074.6A CN201710391074A CN107024033A CN 107024033 A CN107024033 A CN 107024033A CN 201710391074 A CN201710391074 A CN 201710391074A CN 107024033 A CN107024033 A CN 107024033A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
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- 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
- F26B21/003—Supply-air or gas filters
-
- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The present invention relates to heat pump drying technology field, a kind of closed type heat pump drying system with dehumidification function is particularly related to.The system includes three pressure air-cooled heat pump subsystems and closed type drying medium circulation subsystem.Three pressure air-cooled heat pump subsystems include main road compressor, main road oil eliminator, condenser, recooler, device for drying and filtering, in calm the anger liquid/gas separator, dehumidify evaporimeter, thermal source evaporator, low-pressure gas-liquid separator, evaporating pressure regulating valve, bypass compressor, bypass oil eliminator；Closed type drying medium circulation subsystem is included between auxiliary PTC electric heater, circulating fan, material drying, material, temperature sensor, humidity sensor, moist chamber, medium heating chamber and connection air channel.Environment is seriously polluted, operating cost is high, Drying Rates are slow in the existing stoving process of present invention solution, the dehumidifying more low prominent technical problem of observable index, significantly improves the efficiency of heat pump drying material, it is ensured that layer color, quality and the fragrance of material drying.
Description
Technical field
The present invention relates to heat pump drying technology field, particularly relate to a kind of closed type heat pump with dehumidification function and dry
Dry systems.
Background technology
In face of becoming increasingly conspicuous for energy shortage and problem of environmental pollution, traditional fuel oil, combustion gas, fire coal or burn wood etc.
Drying technology is gradually eliminated, and current conventional environmentally friendly drying technology mainly has two kinds, and one kind is direct using electrothermal tube
Heating technique, it is simple to operate, but efficiency is too low, and operating cost is higher, opposite with the energy saving policy of country；Another is using heat
Pump drying technology, particularly air source heat pump technology, simple in construction, easy to install, energy-conserving and environment-protective, existing Some Enterprises are opened
Beginning comes into operation.But conventional air source heat pump drying technology has the following disadvantages at present：It is empty when summer, outside air temperature was too high
The condensing pressure of air supply heat pump is too high, compressor pressure ratios are excessive, excessive discharge temperature, its heating capacity and Energy Efficiency Ratio drastically under
Drop, in some instances it may even be possible to cause the frequent protectiveness of compressor to be shut down；When equally outside air temperature is too low in the winter time, the evaporation of air source heat pump
Temperature is too low, evaporator surface frosting is serious, compressor pressure ratios are excessive, excessive discharge temperature, its heating capacity and Energy Efficiency Ratio
Drastically decline, in some instances it may even be possible to cause device to be not normally functioning.In a word, when outdoor temperature is too high or too low, regular air source
The protrusion technical problem that heat pump is present, has had a strong impact on popularization and application of the air source heat pump in drying field.In addition, to danger
Property material, peculiar smell material, moisture content high material and heat sensitive material when being dried, the circulation drying medium mode of open type is not
Stoving process requirement can be met.
The content of the invention
The invention provides a kind of closed type heat pump drying system with dehumidification function, to solve in existing stoving process
Environmental pollution is serious, dehumidifying observable index is relatively low, operating cost is high, Drying Rates are slow, alternating temperature regulation more difficulty etc. protrudes technology
Problem.
In order to solve the above technical problems, the present invention uses following technical scheme：
The present invention provides a kind of closed type heat pump drying system with dehumidification function, including three pressure air-cooled heat pump subsystems with
Closed type dries medium circulation subsystem.Three described pressure air-cooled heat pump subsystems by main road compressor, main road oil eliminator,
Condenser, recooler, device for drying and filtering, peephole, the first expansion valve, in calm the anger liquid/gas separator, the second expansion valve, dehumidifying evaporation
It is device, thermal source evaporator, low-pressure gas-liquid separator, evaporator pressure regulator, bypass compressor, bypass oil eliminator, first unidirectional
Valve, the second check valve, the first electric controller, the second electric controller and connecting pipe composition.Its specific annexation：Institute
The exhaust outlet for stating main road compressor passes sequentially through the import respectively with condenser of main road oil eliminator, the first check valve, second single
It is connected to the outlet of valve；The outlet of the condenser is connected with the main road import of recooler；The main road of the recooler goes out
Mouth passes sequentially through calmed the anger with the import of liquid/gas separator of device for drying and filtering, peephole, the first expansion valve and is connected；Medium pressure gas
Bypass import, the import of the second expansion valve of two outlets of liquid/gas separator respectively with recooler are connected；Second expansion
The outlet of valve passes through the first electric controller, the second electric controller and dehumidify evaporimeter, the import phase of thermal source evaporator respectively
Connection；Import of the outlet of the dehumidify evaporimeter and thermal source evaporator with low-pressure gas-liquid separator is connected；The low pressure
The outlet of gas-liquid separator is connected with the air entry of main road compressor；Adjusted by evaporating pressure the bypass outlet of the recooler
Section device is connected with the air entry of bypass compressor；The exhaust outlet of the bypass compressor passes sequentially through bypass oil eliminator,
Import, the outlet of the first check valve of two check valves respectively with condenser are connected.
Described closed type dry medium circulation subsystem between auxiliary PTC electric heater, circulating fan, material drying,
Material, temperature sensor, humidity sensor, moist chamber, condensate outlet, medium heating chamber and connection air channel composition.Its
It is specific that annexation is installed：Condenser, auxiliary PTC electric heater are successively installed, its air outlet leads in the medium heating chamber
Air channel is crossed with the air inlet of circulating fan to be connected；The air outlet of the circulating fan is connected with the air inlet between material drying
Connect；The shelf for laying material is installed, its air outlet is by being provided with temperature sensor, humidity sensor in the material drying
The air channel of device is connected with the air inlet of moist chamber；Dehumidify evaporimeter and condensate outlet are installed in the moist chamber, its
Air outlet is connected by air channel with the air inlet of medium heating chamber.
Main road compressor and bypass compressor of the present invention are respectively to determine frequency scroll compressor, determine frequency rolling-rotor
Any one form in formula compressor, inverter scroll compressor, frequency conversion rolling rotor compressor.Described condenser,
Dehumidify evaporimeter, thermal source evaporator are any one in fin-tube heat exchanger, stacked heat exchanger, parallel flow heat exchanger
Structure type.Described the first expansion valve and the second expansion valve is respectively hand expansion valve, choke type expansion valve, float-ball type expansion
Any one throttle mechanism form in valve, heating power expansion valve, electric expansion valve.Described circulating fan is frequency conversion fan, determined
Any one form in frequency blower fan, gear shift blower fan.Described evaporator pressure regulator is one kind by upstream pressure（That is vapor pres- sure
Power）It is any in the proportional controller of control, proportional and integral controller, proportion differential adjuster, proportional integral derivative controller
A kind of adjuster form.Described recooler is any one structure shape in plate type heat exchanger, double-tube heat exchanger, flash evaporation
Formula.
Beneficial effects of the present invention are as follows：
A kind of closed type heat pump drying system with dehumidification function that the present invention is provided, its is novel, unit design optimization
It is ingenious, by matching dehumidify evaporimeter and bypass regulating system on the basis of conventional heat pump drying system（Mainly by bypass pressure
Contracting machine, bypass oil eliminator, bypass condenser, recooler and evaporator pressure regulator etc. are constituted）, the system has following main
Advantage：
（1）By the auxiliary adjustment of bypass regulating system, the air-cooled heat pump drying system can solve summer high temperature refrigeration work
The protrusion that condensing pressure is too high under pattern, compressor pressure ratios are excessive, excessive discharge temperature, the frequent protectiveness of compressor are shut down is asked
Topic, can solve winter low temperature and heat that evaporating temperature under mode of operation is too low, evaporator surface frosting serious, compressor pressure ratios again
The outstanding problem that excessive, excessive discharge temperature, heating capacity and Energy Efficiency Ratio drastically decline, improves air-cooled heat pump drying system complete
Year reliability of operation, stability and economy, have widened the application field of air-cooled heat pump drying system.
（2）By the auxiliary adjustment of bypass regulating system, the heating capacity of the air-cooled heat pump drying system can dry with material
Do the requirement of technique and change rapidly, significantly improve the dehumidifying observable index of material drying, it is ensured that layer color, the product of material drying
Matter and fragrance.
（3）Medium mode is dried by the circulation of dehumidify evaporimeter rapid moisture removal function and closed type, the air-cooled heat pump dries
Dry systems realize the high efficiency drying to dangerous material, peculiar smell material, moisture content high material and heat sensitive material.
（4）A kind of closed type heat pump drying system with dehumidification function that the present invention is provided, solves existing heat pump and dries
The defect of dry technology, with drying efficiency is high, energy-conservation, the quality better of material drying and the features such as health, therefore, it has extensive
Market application foreground and huge market potential, it is adaptable to a wide range of popularization and application.
Brief description of the drawings
Fig. 1 is structure principle chart of the invention.
Fig. 2 is single stage compress drying work model process figure.
Fig. 3 is single stage compress+PTC+dehumidifying drying mode of operation flow chart.
Fig. 4 is three pressure drying work model process figures.
Fig. 5 is three pressure+dehumidifying drying mode of operation flow chart.
Fig. 6 is bypass+PTC drying work model process figures.
Sequence number in figure：1 is main road compressor, and 2 be main road oil eliminator, and 3 be condenser, and 4 be recooler, and 5 be dried
Filter, 6 be peephole, and 7 be the first expansion valve, 8 be in calm the anger liquid/gas separator, 9 be the second expansion valve, and 10 be dehumidify evaporimeter,
11 be thermal source evaporator, and 12 be low-pressure gas-liquid separator, and 13 be evaporator pressure regulator, and 14 be bypass compressor, and 15 be bypass
Oil eliminator, 16 be the first check valve, and 17 be the second check valve, and 18 be the first electric controller, and 19 be the second electric controller,
20 be auxiliary PTC electric heater, and 21 be circulating fan, and 22 be that between material drying, 23 be material, and 24 be temperature sensor, and 25 are
Humidity sensor, 26 be moist chamber, and 27 be condensate outlet, and 28 be medium heating chamber.
Embodiment
The present invention is below with reference to embodiment（Accompanying drawing）It is described further, but is not intended to limit the present invention.
Embodiment 1
As shown in figure 1, the present invention provides a kind of closed type heat pump drying system with dehumidification function, the system is main by three pressures
Power air-cooled heat pump subsystem and closed type drying medium circulation subsystem composition.Three wherein described pressure air-cooled heat pump subsystems
By main road compressor 1, main road oil eliminator 2, condenser 3, recooler 4, device for drying and filtering 5, peephole 6, the first expansion valve 7,
In calm the anger liquid/gas separator 8, the second expansion valve 9, dehumidify evaporimeter 10, thermal source evaporator 11, low-pressure gas-liquid separator 12, vapor pres- sure
Draught control mechanism 13, bypass compressor 14, bypass oil eliminator 15, the first check valve 16, the second check valve 17, the first motorized adjustment
Device 18, the second electric controller 19 and connecting pipe composition.Its specific annexation：The exhaust outlet of the main road compressor 1
Import, the outlet of the second check valve 17 of main road oil eliminator 2, the first check valve 16 respectively with condenser 3 is passed sequentially through to be connected
Connect；The outlet of the condenser 3 is connected with the main road import of recooler 4；The main road outlet of the recooler 4 passes sequentially through dry
Calmed the anger with the import of liquid/gas separator 8 of dry filter 5, peephole 6, the first expansion valve 7 is connected；Medium pressure gas-liquid separator
Bypass import, the import of the second expansion valve 9 of 8 two outlets respectively with recooler 4 are connected；Second expansion valve 9
Outlet is entered by the first electric controller 18, the second electric controller 19 and dehumidify evaporimeter 10, thermal source evaporator 11 respectively
Mouth is connected；Import of the outlet of the dehumidify evaporimeter 10 and thermal source evaporator 11 with low-pressure gas-liquid separator 12 is connected
Connect；The outlet of the low-pressure gas-liquid separator 12 is connected with the air entry of main road compressor 1；The bypass of the recooler 4 goes out
Mouth is connected by evaporator pressure regulator 13 with the air entry of bypass compressor 14；The exhaust outlet of the bypass compressor 14 according to
The secondary outlet by the import respectively with condenser 3 of bypass oil eliminator 15, the second check valve 17, the first check valve 16 is connected
Connect.Described closed type dry medium circulation subsystem 22 between auxiliary PTC electric heater 20, circulating fan 21, material drying,
Material 23, temperature sensor 24, humidity sensor 25, moist chamber 26, condensate outlet 27, medium heating chamber 28 and connection
Air channel is constituted.Its specific installation annexation：Condenser 3, auxiliary PTC electrical heating are successively installed in the medium heating chamber 28
Device 20, its air outlet is connected by air channel with the air inlet of circulating fan 21；The air outlet of the circulating fan 21 and drying
The air inlet of storeroom 22 is connected；The shelf for laying material 23 is installed, its air outlet passes through in 22 between the material drying
Temperature sensor 24, the air channel of humidity sensor 25 are installed with the air inlet of moist chamber 26 to be connected；In the moist chamber 26
Dehumidify evaporimeter 10 and condensate outlet 27 are installed, its air outlet is connected by air channel with the air inlet of medium heating chamber 28
Connect.
Main road compressor 1 of the present invention distinguishes frequency-changing cyclone formula to determine frequency scroll compressor and bypass compressor 14
Compressor.Described condenser 3 is that fin-tube heat exchanger, dehumidify evaporimeter 10 are stacked heat exchanger, thermal source evaporator 11
For parallel flow heat exchanger.The first described expansion valve 7 is hand expansion valve, and the second expansion valve 9 is choke type expansion valve.It is described
Circulating fan 21 be frequency conversion fan.Described evaporator pressure regulator 13 is one kind by upstream pressure（That is evaporating pressure）Control
Proportional controller.Described recooler 4 is plate type heat exchanger.
Embodiment 2
Main road compressor 1 of the present invention is determines frequency rolling rotor compressor, and bypass compressor 14 is frequency-changing cyclone formula pressure
Contracting machine.Described condenser 3, dehumidify evaporimeter 10 are that stacked heat exchanger, thermal source evaporator 11 are parallel flow heat exchanger.Institute
The first expansion valve 7 stated is hand expansion valve, and the second expansion valve 9 is choke type expansion valve.Described circulating fan 21 is gear shift
Blower fan.Described evaporator pressure regulator 13 is one kind by upstream pressure（That is evaporating pressure）The proportional controller of control.It is described
Recooler 4 be flash evaporation.Other structures are same as Example 1.
Embodiment 3
Main road compressor 1 of the present invention is frequency conversion rolling rotor compressor, and bypass compressor 14 is to determine frequency-changing cyclone formula
Compressor.Described condenser 3 is that stacked heat exchanger, dehumidify evaporimeter 10 are parallel flow heat exchanger, thermal source evaporator 11
For fin-tube heat exchanger.The first described expansion valve 7 is heating power expansion valve, and the second expansion valve 9 is choke type expansion valve.It is described
Circulating fan 21 be gear shift blower fan.Described evaporator pressure regulator 13 is proportional and integral controller.Described recooler 4 is
Any one structure type in plate type heat exchanger, double-tube heat exchanger, flash evaporation.Other structures are same as Example 1.
Embodiment 4
Main road compressor 1 of the present invention is frequency conversion rolling rotor compressor, and bypass compressor 14 is to determine frequency rolling-rotor
Formula compressor.Described condenser 3 is that parallel flow heat exchanger, dehumidify evaporimeter 10 are fin-tube heat exchanger, thermal source evaporation
Device 11 is fin-tube heat exchanger.The first described expansion valve 7 is electric expansion valve, and the second expansion valve 9 is float-ball type expansion valve.
Described circulating fan 21 is to determine frequency blower fan.Described evaporator pressure regulator 13 is proportional integral derivative controller.Described
Recooler 4 is double-tube heat exchanger.Other structures are same as Example 1.
Embodiment 5
Main road compressor 1 of the present invention is inverter scroll compressor, and bypass compressor 14 is to determine frequency rolling rotor-type pressure
Contracting machine.Described condenser 3 is that stacked heat exchanger, dehumidify evaporimeter 10 are that parallel flow heat exchanger, thermal source evaporator 11 are
Fin-tube heat exchanger.The first described expansion valve 7 is heating power expansion valve, and the second expansion valve 9 is electric expansion valve.Described follows
Ring blower fan 21 is gear shift blower fan.Described evaporator pressure regulator 13 is proportional and integral controller.Described recooler 4 is sleeve pipe
Heat exchanger.Other structures are same as Example 1.
The Optimized Matching for drying medium circulation subsystem by three pressure air-cooled heat pump subsystems and closed type is combined, and can be compiled
Five kinds of mode of operations can be achieved in range controller PLC Intelligent adjustments, the present invention：
（1）Single stage compress drying work pattern
Fig. 2 is single stage compress drying work model process figure, when outside air temperature is approximately between -5 DEG C ~ 45 DEG C, and
And drying materials operation just starts, and when system does not need energy and humidity regulation, can use this mode of operation.Now main road compresses
Machine 1, the blower fan of thermal source evaporator 11, the second electric controller 19, circulating fan 21 start, and bypass compressor 14, first is electronic
Adjuster 18, auxiliary PTC electric heater 20 are closed.The workflow of three pressure air-cooled heat pump subsystems：Main road compressor 1 is discharged
High temperature and high pressure gaseous refrigerant pass sequentially through main road oil eliminator 2, the first check valve 16 enter condenser 3, release heat add
Medium is dried in the circulation that heat is introduced through circulating fan 21, is condensed into supercooling or saturation liquid refrigerant, is then passed sequentially through again cold
Device 4, device for drying and filtering 5, peephole 6 enter the first expansion valve 7, and middle middle benefit gas is changed into after the flow restriction control of the first expansion valve 7
The gas-liquid two-phase cold-producing medium of pressure, liquid/gas separator 8 of being calmed the anger in carries out gas-liquid separation, then in calm the anger the bottom of liquid/gas separator 8
Liquid refrigerant is changed into the gas-liquid two-phase cold-producing medium of low-temp low-pressure after the flow restriction control of the second expansion valve 9 again, passes through second
Electric controller 19 enters thermal source evaporator 11, absorbs the air-source heat that the blower fan of thermal source evaporator 11 is introduced, and evaporation is changed into
The superheated refrigerant steam of low pressure, enters the suction of main road compressor 1 after then carrying out gas-liquid separation through low-pressure gas-liquid separator 12
Gas port, after the compression of main road compressor 1, discharges high temperature and high pressure gaseous refrigerant, initially enters subsequent cycle.Dry medium
The workflow of cycle subsystem：The high temperature low humidity drying medium for coming from medium heating chamber 28 enters drying through circulating fan 21
Heat cooling is discharged after storeroom 22, heated material 23, while absorbing the moisture of material, is changed into low temperature, the baking of higher levels of humidity
Dry medium, then after the temperature sensor 24 in air channel, humidity sensor 25 are detected, then process moist chamber 26 enters medium
Heating chamber 28, is absorbed into after the latent heat of phase change of the gaseous refrigerant of condenser 3 release and heats up, and the drying for being changed into high temperature low humidity is situated between
Matter, starts subsequent cycle.
（2）Single stage compress+PTC+dehumidifying drying mode of operation
Fig. 3 is single stage compress+PTC+dehumidifying drying mode of operation flow chart, when outside air temperature is approximately at -5 DEG C ~ 45 DEG C
Between when, and in drying materials running, the drying humidity of media that temperature sensor 24, humidity sensor 25 are detected is excessive
When, this mode of operation can be used.Now main road compressor 1, the first electric controller 18, auxiliary PTC electric heater 20, circulated air
Machine 21 starts, and blower fan, bypass compressor 14, the second electric controller 19 of thermal source evaporator 11 are closed.Three pressure air-cooled heat pumps
The workflow of subsystem：The high temperature and high pressure gaseous refrigerant that main road compressor 1 is discharged passes sequentially through main road oil eliminator 2, the
One check valve 16 enters condenser 3, and medium is dried in the circulation that release heat is introduced through circulating fan 21, be condensed into be subcooled or
Saturation liquid refrigerant, then passes sequentially through recooler 4, device for drying and filtering 5, peephole 6 and enters the first expansion valve 7, by the
It is changed into the gas-liquid two-phase cold-producing medium of medium temperature and medium pressure after the flow restriction control of one expansion valve 7, liquid/gas separator 8 of being calmed the anger in carries out gas-liquid
Separation, then in the calm the anger liquid refrigerant of the bottom of liquid/gas separator 8 be changed into low temperature after the flow restriction control of the second expansion valve 9 again
The gas-liquid two-phase cold-producing medium of low pressure, enters dehumidify evaporimeter 10 by the first electric controller 18, and absorption is drawn through circulating fan 21
The heat of the circulation drying medium entered, evaporation is changed into the superheated refrigerant steam of low pressure, then entered through low-pressure gas-liquid separator 12
Enter the air entry of main road compressor 1 after row gas-liquid separation, after the compression of main road compressor 1, discharge high pressure gaseous
Refrigerant, initially enters subsequent cycle.Dry the workflow of medium circulation subsystem：Come from the high temperature of medium heating chamber 28
The drying medium of low humidity is through circulating fan 21 into 22 between material drying, and the cooling of release heat, absorbs simultaneously after heated material 23
The moisture of material, is changed into the drying medium of low temperature and high relative humidity, then by the temperature sensor 24 in air channel, humidity sensor 25
After detection, into moist chamber 26, release heat enters in the gas-liquid two-phase cold-producing medium of dehumidify evaporimeter 10, drying medium
Vapor becomes condensate precipitation, and is excluded by condensate outlet 27, and then the drying medium of low temperature and low humidity enters through air channel
The heat of medium heating chamber 28, the successively latent heat of phase change of the gaseous refrigerant release of absorptive condenser 3 and auxiliary PTC electric heater 20
Heated up step by step after amount, be changed into the drying medium of high temperature low humidity, start subsequent cycle.
（3）Three pressure drying work patterns
Fig. 4 is three pressure drying work model process figures, when outside air temperature is approximately at 46 DEG C ~ 55 DEG C or -20 DEG C ~ -6 DEG C
Between when, and drying materials operation just starts, and system does not need energy and during humidity regulation, can use this mode of operation.This
When main road compressor 1, the blower fan of thermal source evaporator 11, bypass compressor 14, the second electric controller 19, circulating fan 21 open
Dynamic, the first electric controller 18, auxiliary PTC electric heater 20 are closed.The workflow of three pressure air-cooled heat pump subsystems：Main road
The high temperature and high pressure gaseous refrigerant that compressor 1 is discharged passes sequentially through main road oil eliminator 2, the first check valve 16 and by the second list
Mixed to the high temperature and high pressure gaseous refrigerant of valve 17, subsequently into condenser 3, release heat is introduced through circulating fan 21
Circulation drying medium, is condensed into supercooling or saturation liquid refrigerant, and heat is discharged through cold again into the main road side of recooler 4
The saturation gaseous refrigerant of the middle temperature of middle pressure of the bypass side of device 4, is further subcooled and is changed into the larger liquid refrigerant of degree of supercooling, then according to
It is secondary that first expansion valve 7 is entered by device for drying and filtering 5, peephole 6, it is changed into middle temperature after the flow restriction control of the first expansion valve 7
The gas-liquid two-phase cold-producing medium of middle pressure, liquid/gas separator 8 of being calmed the anger in is divided into two-way after carrying out gas-liquid separation, wherein being all the way separation
The saturation liquid refrigerant of the middle temperature of middle pressure gone out, the bottom of liquid/gas separator 8 discharge of being calmed the anger in, then passes through the second expansion valve 9 again
Flow restriction control after be changed into the gas-liquid two-phase cold-producing medium of low-temp low-pressure, pass through the second electric controller 19 and enter thermal source evaporator
11, the air-source heat that the blower fan of thermal source evaporator 11 is introduced is absorbed, evaporation is changed into the superheated refrigerant steam of low pressure, Ran Houjing
Low-pressure gas-liquid separator 12 enter after gas-liquid separation the air entry of main road compressor 1, by the compression of main road compressor 1
Afterwards, high temperature and high pressure gaseous refrigerant is discharged, subsequent cycle is initially entered.Another road is the saturation gaseous state for the middle temperature of middle pressure isolated
Refrigerant, the top of liquid/gas separator 8 discharge of being calmed the anger in, the supercooling through the main road side of recooler 4 is absorbed into the bypass side of recooler 4
Or saturation liquid refrigerant heat, it is changed into overheating gaseous refrigerant, then enter auxiliary by the throttling pressure regulation of evaporator pressure regulator 13
The air entry of road compressor 14, by the compression discharge high temperature and high pressure gaseous refrigerant of bypass compressor 14, is then passed sequentially through auxiliary
Road binders separator 15, the second check valve 17 are mixed with the high temperature and high pressure gaseous refrigerant by the first check valve 16, into condensation
Device 3, initially enters subsequent cycle.The workflow for drying medium circulation subsystem is identical with single stage compress drying work pattern.
（4）Three pressure+dehumidifying drying mode of operation
Fig. 5 is three pressure+dehumidifying drying mode of operation flow chart, when outside air temperature is approximately at 46 DEG C ~ 55 DEG C or -20 DEG C
When between ~ -6 DEG C, and in drying materials running, the drying medium that temperature sensor 24, humidity sensor 25 are detected is wet
When spending big, this mode of operation can be used.Now main road compressor 1, bypass compressor 14, the first electric controller 18, circulation
Blower fan 21 starts, and the blower fan of thermal source evaporator 11, the second electric controller 19, auxiliary PTC electric heater 20 are closed.Three pressure winds
The workflow of cold-heat pump subsystem：The high temperature and high pressure gaseous refrigerant that main road compressor 1 is discharged passes sequentially through main road oil separation
Device 2, the first check valve 16 are mixed with the high temperature and high pressure gaseous refrigerant by the second check valve 17, subsequently into condenser 3, are released
Medium is dried in the circulation that thermal discharge heating is introduced through circulating fan 21, supercooling or saturation liquid refrigerant is condensed into, into cold again
The main road side of device 4 discharges the saturation gaseous refrigerant of middle pressure middle temperature of the heat through the bypass side of recooler 4, and further supercooling becomes
For the liquid refrigerant that degree of supercooling is larger, then pass sequentially through device for drying and filtering 5, peephole 6 and enter the first expansion valve 7, by the
It is changed into the gas-liquid two-phase cold-producing medium of medium temperature and medium pressure after the flow restriction control of one expansion valve 7, liquid/gas separator 8 of being calmed the anger in carries out gas-liquid
It is divided into two-way after separation, wherein being all the way the saturation liquid refrigerant for the middle temperature of middle pressure isolated, is calmed the anger under liquid/gas separator 8
Portion is discharged, and is then changed into the gas-liquid two-phase cold-producing medium of low-temp low-pressure after the flow restriction control of the second expansion valve 9 again, is passed through first
Electric controller 18 enters dehumidify evaporimeter 10, absorbs the heat that medium is dried in the circulation introduced through circulating fan 21, and evaporation becomes
For the superheated refrigerant steam of low pressure, enter main road compressor 1 after then carrying out gas-liquid separation through low-pressure gas-liquid separator 12
Air entry, after the compression of main road compressor 1, discharges high temperature and high pressure gaseous refrigerant, initially enters subsequent cycle.Another road
For the saturation gaseous refrigerant for the middle temperature of middle pressure isolated, the top of liquid/gas separator 8 discharge of being calmed the anger in, into the auxiliary of recooler 4
Trackside absorbs supercooling or saturation liquid refrigerant heat through the main road side of recooler 4, is changed into overheating gaseous refrigerant, then by steaming
The air entry that the throttling pressure regulation of pressure regulator 13 enters bypass compressor 14 is sent out, it is high by the compression discharge high temperature of bypass compressor 14
Gaseous refrigerant is pressed, bypass oil eliminator 15, the second check valve 17 and the high temperature by the first check valve 16 is then passed sequentially through
High-pressure gaseous refrigerant is mixed, and into condenser 3, initially enters subsequent cycle.Dry the workflow of medium circulation subsystem：
Come from the drying medium of high temperature low humidity of medium heating chamber 28 through 22, heated material 23 between the entrance material drying of circulating fan 21
The cooling of release heat, while absorbing the moisture of material, is changed into the drying medium of low temperature and high relative humidity, then by the temperature in air channel afterwards
Spend after sensor 24, the detection of humidity sensor 25, into moist chamber 26, release heat enters the gas-liquid of dehumidify evaporimeter 10
Vapor in two phase refrigerant, drying medium becomes condensate precipitation, and is excluded by condensate outlet 27, and then low temperature is low
Wet drying medium rises after entering medium heating chamber 28, the latent heat of phase change of the gaseous refrigerant release of absorptive condenser 3 through air channel
Temperature, is changed into the drying medium of high temperature low humidity, starts subsequent cycle.
（5）Bypass+PTC drying work patterns
Fig. 6 is bypass+PTC drying work model process figures, and the middle and later periods is run in drying materials, and temperature sensor 24, humidity are passed
When the drying humidity of media that sensor 25 is detected is smaller, this mode of operation can be used.Now bypass compressor 14, auxiliary PTC electricity add
Hot device 20, circulating fan 21 start, main road compressor 1, the blower fan of thermal source evaporator 11, first the 18, second electricity of electric controller
Dynamic adjuster 19 is closed.The workflow of three pressure air-cooled heat pump subsystems：The high pressure gaseous that bypass compressor 14 is discharged
Refrigerant passes sequentially through bypass oil eliminator 15, the second check valve 17 and enters condenser 3, and release heat is through circulating fan 21
The circulation drying medium of introducing, is condensed into supercooling or saturation liquid refrigerant, heat is discharged into the main road side of recooler 4
The saturation gaseous refrigerant of the middle temperature of middle pressure through the bypass side of recooler 4, further supercooling is changed into the larger liquid refrigeration of degree of supercooling
Agent, then device for drying and filtering 5, peephole 6 are passed sequentially through into the first expansion valve 7, become after the flow restriction control of the first expansion valve 7
For the gas-liquid two-phase cold-producing medium of medium temperature and medium pressure, liquid/gas separator 8 of being calmed the anger in carries out gas-liquid separation, the middle temperature of middle pressure isolated
Saturation gaseous refrigerant, the top of liquid/gas separator 8 discharge of being calmed the anger in, absorbs through the main road of recooler 4 into the bypass side of recooler 4
The supercooling of side or saturation liquid refrigerant heat, are changed into overheating gaseous refrigerant, then adjust by the throttling of evaporator pressure regulator 13
The air entry into bypass compressor 14 is pressed into, the compression discharge high temperature and high pressure gaseous refrigerant of bypass compressor 14 is eventually passed, opens
Beginning enters subsequent cycle.Dry the workflow of medium circulation subsystem：Come from the high temperature low humidity drying of medium heating chamber 28
Medium is through circulating fan 21 into 22 between material drying, and release heat cools after heated material 23, while absorbing the water of material
Point, it is changed into low temperature, the drying medium of higher levels of humidity, is then detected by the temperature sensor 24 in air channel, humidity sensor 25
Afterwards, then by moist chamber 26 enter medium heating chamber 28, successively the latent heat of phase change of the gaseous refrigerant release of absorptive condenser 3 and
Heated up step by step after the heat for aiding in PTC electric heater 20, be changed into the drying medium of high temperature low humidity, start subsequent cycle.
Claims (8)
1. a kind of closed type heat pump drying system with dehumidification function, it is characterised in that：Including three pressure air-cooled heat pump subsystems
System and closed type dry medium circulation subsystem；The three pressure air-cooled heat pump subsystem includes main road compressor（1）, main road oil
Separator（2）, condenser（3）, recooler（4）, device for drying and filtering（5）, peephole（6）, the first expansion valve（7）, in calm the anger liquid
Separator（8）, the second expansion valve（9）, dehumidify evaporimeter（10）, thermal source evaporator（11）, low-pressure gas-liquid separator（12）, evaporation
Pressure regulator（13）, bypass compressor（14）, bypass oil eliminator（15）And connecting pipe；Described closed type drying is situated between
Matter cycle subsystem includes auxiliary PTC electric heater（20）, circulating fan（21）, between material drying（22）, moist chamber（26）, be situated between
Matter heating chamber（28）And connection air channel；The main road compressor（1）Exhaust outlet and main road oil eliminator（2）It is connected；Condensation
Device（3）Outlet and recooler（4）Main road import be connected, recooler（4）Main road outlet pass sequentially through device for drying and filtering
（5）, peephole（6）, the first expansion valve（7）Calmed the anger with liquid/gas separator（8）Import be connected；In calm the anger liquid/gas separator（8）
Two outlet respectively with recooler（4）Bypass import, the second expansion valve（9）Import be connected；Dehumidify evaporimeter（10）
With thermal source evaporator（11）Outlet with low-pressure gas-liquid separator（12）Import be connected；Low-pressure gas-liquid separator（12）'s
Outlet and main road compressor（1）Air entry be connected；Recooler（4）Bypass outlet with bypass compressor（14）Air entry
It is connected, connecting pipe therebetween is provided with evaporator pressure regulator（13）；Bypass compressor（14）Exhaust outlet with it is auxiliary
Road binders separator（15）Connected, bypass oil eliminator（15）With condenser（3）It is connected；First check valve（16）Import and main road
Oil eliminator（2）It is connected, main road oil eliminator（2）Again with main road compressor（1）Gas outlet be connected；Circulating fan（21）Go out
Between air port and material drying（22）Air inlet be connected；Between the material drying（22）Lay material is inside installed（23）Put
Frame；Between material drying（22）With moist chamber（26）Air inlet connected by connecting air channel, moist chamber（26）It is interior to be steamed provided with dehumidifying
Send out device（10）.
2. the closed type heat pump drying system according to claim 1 with dehumidification function, it is characterised in that：Three pressure
Power air-cooled heat pump subsystem also includes the first check valve（16）, the second check valve（17）, the first electric controller（18）, second electricity
Dynamic adjuster（19）；Bypass oil eliminator（15）With condenser（3）Between connecting pipe be provided with the second check valve（17）；It is cold
Condenser（3）Import and the first check valve（16）Outlet be connected, the first check valve（16）With main road oil eliminator（2）Phase
Even, the first check valve（16）Respectively with condenser（3）Import and the second check valve（17）Outlet be connected；Second expansion valve
（9）Outlet respectively with the second electric controller（19）With the first electric controller（18）It is connected；First electric controller（18）
With dehumidify evaporimeter（10）Connected, the second electric controller（19）With thermal source evaporator（11）Import be connected.
3. the closed type heat pump drying system according to claim 1 with dehumidification function, it is characterised in that：Described closes
Road formula drying medium circulation subsystem also includes temperature sensor（24）, humidity sensor（25）, condensate outlet（27）；It is cold
Condenser（3）With auxiliary PTC electric heater（20）Positioned at medium heating chamber（28）It is interior, medium heating chamber（28）Air outlet pass through even
Give a dinner for a visitor from afar and circulating fan（21）Air inlet connect, temperature sensor（24）And humidity sensor（25）Between material drying
（22）Air outlet at, condensate outlet（27）Located at moist chamber（26）It is interior, moist chamber（26）Air outlet by connecting wind
Road and medium heating chamber（28）Air inlet be connected.
4. the closed type heat pump drying system according to claim 1 with dehumidification function, it is characterised in that：Described master
Road compressor（1）With bypass compressor（14）Respectively determine frequency scroll compressor, determine frequency rolling rotor compressor, frequency conversion whirlpool
Any one form in rotary compressor, frequency conversion rolling rotor compressor；Described condenser（3）Exchanged heat for fin tube type
Any one structure type in device, stacked heat exchanger, parallel flow heat exchanger；Dehumidify evaporimeter（10）Changed for fin tube type
Any one structure type in hot device, stacked heat exchanger, parallel flow heat exchanger；Thermal source evaporator（11）For fin tube type
Any one structure type in heat exchanger, stacked heat exchanger, parallel flow heat exchanger.
5. the closed type heat pump drying system according to claim 1 with dehumidification function, it is characterised in that：Described
One expansion valve（7）With the second expansion valve（9）Respectively hand expansion valve, choke type expansion valve, float-ball type expansion valve, thermal expansion
Any one throttle mechanism form in valve, electric expansion valve.
6. the closed type heat pump drying system according to claim 1 with dehumidification function, it is characterised in that：Described follows
Ring blower fan（21）Respectively frequency conversion fan, any one form determined in frequency blower fan, gear shift blower fan.
7. the closed type heat pump drying system according to claim 1 with dehumidification function, it is characterised in that：Described steaming
Send out pressure regulator（13）For a kind of proportional controller controlled by upstream pressure, proportional and integral controller, proportion differential regulation
Any one adjuster form in device, proportional integral derivative controller.
8. the closed type heat pump drying system according to claim 1 with dehumidification function, it is characterised in that：It is described again
Cooler（4）For any one structure type in plate type heat exchanger, double-tube heat exchanger, flash evaporation.
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| CN107514899A (en) * | 2017-10-11 | 2017-12-26 | 西安中亚科技发展有限公司 | A kind of heat pump drying device |
| CN107940923A (en) * | 2017-12-19 | 2018-04-20 | 贝莱特空调有限公司 | A kind of Multi-functional dehumidifying dryer system |
| CN108286178A (en) * | 2018-03-23 | 2018-07-17 | 天津城建大学 | Based on CO2The enclosed heat pump clothes-drying drying system of Trans-critical cycle heat pump cycle |
| CN108489251A (en) * | 2018-06-11 | 2018-09-04 | 南京农业大学 | A kind of pump type heat low-temperature circulating formula crop dryer of waste heat recoverable |
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| CN108489251A (en) * | 2018-06-11 | 2018-09-04 | 南京农业大学 | A kind of pump type heat low-temperature circulating formula crop dryer of waste heat recoverable |
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| CN109405461A (en) * | 2018-11-29 | 2019-03-01 | 江苏天舒电器有限公司 | A kind of agricultural drying equipment of automatic controlled thermal pump-type |
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| CN111520979A (en) * | 2020-04-20 | 2020-08-11 | 蔚复来(浙江)科技股份有限公司 | Kitchen waste fermentation bin drying and dehumidifying device and method adopting air energy heat pump |
| CN111520979B (en) * | 2020-04-20 | 2021-12-17 | 蔚复来(浙江)科技股份有限公司 | Kitchen waste fermentation bin drying and dehumidifying device and method adopting air energy heat pump |
| CN113739560A (en) * | 2020-05-29 | 2021-12-03 | 广东芬蓝环境科技有限公司 | Drying system control method and device and drying system |
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