CN107014173A - A kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary - Google Patents
A kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary Download PDFInfo
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- CN107014173A CN107014173A CN201710391481.7A CN201710391481A CN107014173A CN 107014173 A CN107014173 A CN 107014173A CN 201710391481 A CN201710391481 A CN 201710391481A CN 107014173 A CN107014173 A CN 107014173A
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- drying
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- 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
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
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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
- F26B21/001—Drying-air generating units, e.g. movable, independent of 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
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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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
- F26B21/02—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
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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
- F26B21/06—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
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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
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention relates to heat pump drying technology field, a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary is particularly related to.The closed type heat pump drying system includes the pressure heat pump subsystem of solar air three and closed type drying medium circulation subsystem；The present invention on the basis of heat pump drying system by matching solar thermal collector, dehumidify evaporimeter and bypass regulating system, solve that environment in existing stoving process is seriously polluted, operating cost is high, Drying Rates are slow, the dehumidifying more low prominent technical problem of observable index, significantly improve 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, a kind of closed type heat of direct-expansion type solar energy auxiliary is particularly related to
Pump drying system.
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 of direct-expansion type solar energy auxiliary, to solve existing drying work
Environment is seriously polluted in skill, dehumidifying observable index is relatively low, operating cost is high, Drying Rates are slow, the protrusion of alternating temperature regulation more difficulty
Technical 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 of direct-expansion type solar energy auxiliary, the closed type heat pump drying system
Including the pressure heat pump subsystem of solar energy-air three and closed type drying medium circulation subsystem；The pressure of solar energy-air three heat
Pump subsystem includes main road compressor, main road oil eliminator, main road condenser, recooler, device for drying and filtering, peephole, first
Expansion valve, in calm the anger liquid/gas separator, the second expansion valve, dehumidify evaporimeter, solar thermal collector, low-pressure gas-liquid separator, evaporation
Pressure-regulating valve, bypass compressor, bypass oil eliminator, the first check valve, the second check valve, the first electric control valve, second
Electric control valve and connecting pipe；Closed type drying medium circulation subsystem include auxiliary PTC electric heater, circulating fan,
Between material drying, material, temperature sensor, humidity sensor, moist chamber, condensate outlet, medium heating chamber and connection
Air channel；The exhaust outlet of the main road compressor is connected with main road oil eliminator, main road oil eliminator is connected with the first check valve, the
Import, the outlet of the second check valve of one check valve respectively with main road condenser are connected, the outlet of the main road condenser with
The main road import of recooler is connected, and calmed the anger with the import of liquid/gas separator of the main road of recooler outlet is connected, therebetween
Connecting pipe on be sequentially provided with device for drying and filtering, peephole and the first expansion valve；Two of medium pressure gas-liquid separator go out
Bypass import, the import of the second expansion valve of mouth respectively with recooler are connected, and the outlet of the second expansion valve is electric with first respectively
Dynamic regulating valve, the second electric control valve are connected, and the first electric control valve is connected with dehumidify evaporimeter, the second electric control valve
It is connected with the import of solar thermal collector；The outlet of dehumidify evaporimeter and solar thermal collector with low-pressure gas-liquid separator
Import is connected, and the outlet of low-pressure gas-liquid separator is connected with the air entry of main road compressor；The bypass of the recooler goes out
Mouth is connected by the air entry after evaporating pressure regulating valve with bypass compressor, exhaust outlet and the bypass oil of bypass compressor
It is connected from device, bypass oil eliminator is connected with the second check valve, the outlet and the outlet of the first check valve of the second check valve converge
Afterwards, the import with main road condenser is connected；Main road condenser, auxiliary PTC electric heater are installed in the medium heating chamber,
The air outlet of medium heating chamber is connected by connecting air channel with the air inlet of circulating fan, the air outlet of circulating fan and drying
The air inlet of storeroom is connected；Air outlet between the shelf for laying material, material drying is installed in the material drying
It is connected with the air inlet of moist chamber by being connected air channel, temperature sensor and humidity is installed in connection air channel therebetween
Dehumidify evaporimeter and condensate outlet are installed, the air outlet of moist chamber is by connecting air channel and Jie in sensor, moist chamber
The air inlet of matter heating chamber is connected.
Connected between each structure of pressure heat pump subsystem of solar energy-air three by connecting pipe；Closed type is dried
It is connected between each structure of medium circulation subsystem by connecting air channel.
Described main road compressor and bypass compressor for determine frequency scroll compressor, determine frequency rolling rotor compressor,
Any one form in inverter scroll compressor, frequency conversion rolling rotor compressor.Described main road condenser, dehumidifying are steamed
Hair device is any one structure type in fin-tube heat exchanger, stacked heat exchanger, parallel flow heat exchanger.Described
One expansion valve and the second expansion valve are that hand expansion valve, choke type expansion valve, float-ball type expansion valve, heating power expansion valve, electronics are swollen
Any one throttle mechanism form in swollen valve.Described circulating fan is frequency conversion fan, determines appointing in frequency blower fan, gear shift blower fan
Anticipate a kind of form.Described evaporating pressure regulating valve is one kind by upstream pressure（That is evaporating pressure）The ratio adjusting valve of control,
Any one adjuster form in proportional integration regulating valve, proportion differential regulating valve, PID regulating valve.Described
Recooler is any one structure type in plate type heat exchanger, double-tube heat exchanger, flash evaporation.
Beneficial effects of the present invention are as follows：
A kind of closed type heat pump drying system for direct-expansion type solar energy auxiliary that the present invention is provided, its is novel, unit design
Optimization is ingenious, is adjusted by matching solar thermal collector, dehumidify evaporimeter and bypass on the basis of conventional heat pump drying system
System（Mainly it is made up of bypass compressor, bypass oil eliminator, bypass condenser, recooler and evaporating pressure regulating valve etc.）,
The system has following major 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）Solar energy is as a kind of amount is big, the clean energy resource of aboundresources and environmental protection, when using solar thermal collector
During as heat pump drying system evaporator, the evaporating temperature of heat pump drying unit is significantly improved so that the power consumption of heat pump compressor
Amount is reduced, while reducing the fan operation of air-cooled evaporator, therefore saves the overall running cost of heat pump drying system.
（4）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.
（5）A kind of closed type heat pump drying system for direct-expansion type solar energy auxiliary that the present invention is provided, solves existing heat
The defect of pump drying 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 direct expanding solar heating pump drying work model process figure.
Fig. 3 is single stage compress+PTC+dehumidifying drying mode of operation flow chart.
Fig. 4 is the pressure drying work model process figure of direct-expansion type solar energy+three.
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 main road condenser, and 4 be recooler, and 5 be dry
Dry 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 dehumidifying evaporation
Device, 11 be solar thermal collector, and 12 be low-pressure gas-liquid separator, and 13 be evaporating pressure regulating valve, and 14 be bypass compressor, and 15 are
Bypass oil eliminator, 16 be the first check valve, and 17 be the second check valve, and 18 be the first electric control valve, and 19 be the second electric adjustable
Valve is saved, 20 be auxiliary PTC electric heater, and 21 be circulating fan, 22 be that between material drying, 23 be material, and 24 be TEMP
Device, 25 be humidity sensor, and 26 be moist chamber, and 27 be condensate outlet, and 28 be medium heating chamber.
Embodiment
The present invention once will in conjunction with the embodiments（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 of direct-expansion type solar energy auxiliary, it is characterised in that should
System is main to be made up of the pressure heat pump subsystem of solar energy-air three and closed type drying medium circulation subsystem.It is wherein described
The pressure heat pump subsystem of solar energy-air three by main road compressor 1, main road oil eliminator 2, main road 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, the sun
Can heat collector 11, low-pressure gas-liquid separator 12, evaporating pressure regulating valve 13, bypass compressor 14, bypass oil eliminator 15, first
Check valve 16, the second check valve 17, the first electric control valve 18, the second electric control valve 19 and connecting pipe composition.It has
Body annexation：The exhaust outlet of the main road compressor 1 pass sequentially through main road oil eliminator 2, the first check valve 16 respectively with master
The import of road condenser 3, the outlet of the second check valve 17 are connected；The outlet of the main road condenser 3 and the main road of recooler 4
Import is connected；The main road outlet of the recooler 4 passes sequentially through device for drying and filtering 5, peephole 6, the first expansion valve 7 and middle pressure
The import of gas-liquid separator 8 is connected；Two of medium pressure gas-liquid separator 8 outlets bypass import respectively with recooler 4,
The import of second expansion valve 9 is connected；The outlet of second expansion valve 9 passes through first the 18, second electricity of electric control valve respectively
Dynamic regulating valve 19 is connected with the import of dehumidify evaporimeter 10, solar thermal collector 11；The dehumidify evaporimeter 10 and solar energy
Import of the outlet of heat collector 11 with low-pressure gas-liquid separator 12 is connected；The outlet of the low-pressure gas-liquid separator 12 and master
The air entry of road compressor 1 is connected；The bypass outlet of the recooler 4 passes through evaporating pressure regulating valve 13 and bypass compressor
14 air entry is connected；The exhaust outlet of the bypass compressor 14 passes sequentially through bypass oil eliminator 15, the second check valve 17
Import, the outlet of the first check valve 16 respectively with main road condenser 3 is connected.Described closed type drying medium circulation subsystem
System 22, material 23, temperature sensor 24, humidity sensor between auxiliary PTC electric heater 20, circulating fan 21, material drying
25th, moist chamber 26, condensate outlet 27, medium heating chamber 28 and connection air channel composition.Its specific installation annexation：Institute
Give an account of and main road condenser 3, auxiliary PTC electric heater 20 are successively installed in matter heating chamber 28, its air outlet is by air channel with following
The air inlet of ring blower fan 21 is connected；The air outlet of the circulating fan 21 is connected between material drying 22 air inlet；Institute
State in 22 between material drying and the shelf for laying material 23 is installed, its air outlet is passed by being provided with temperature sensor 24, humidity
The air channel of sensor 25 is connected with the air inlet of moist chamber 26；Dehumidify evaporimeter 10 and condensate are installed in the moist chamber 26
Outlet 27, its air outlet is connected by air channel with the air inlet of medium heating chamber 28.The pressure of solar energy-air three heat
Connected between each structure of pump subsystem by connecting pipe；Pass through connection between closed type drying each structure of medium circulation subsystem
Air channel is connected.
Main road compressor 1 and bypass compressor 14 of the present invention are to determine frequency rolling rotor compressor；Described master
Road condenser 3 is that fin-tube heat exchanger, dehumidify evaporimeter 10 are stacked heat exchanger；The first described expansion valve 7 is manual
Expansion valve, the second expansion valve 9 is choke type expansion valve；Described circulating fan 21 is frequency conversion fan；Described evaporating pressure is adjusted
Valve 13 is saved to be a kind of by upstream pressure（That is evaporating pressure）The proportional integration regulating valve of control；Described recooler 4 changes to be board-like
Hot device.
Embodiment 2
Main road compressor 1 of the present invention is determines frequency scroll compressor, and bypass compressor 14 is to determine frequency rolling rotor-type pressure
Contracting machine；Described main road condenser 3 is that fin-tube heat exchanger, dehumidify evaporimeter 10 are parallel flow heat exchanger；Described
One expansion valve 7 is float-ball type expansion valve, and the second expansion valve 9 is choke type expansion valve；Described circulating fan 21 is to determine frequency blower fan；
Described evaporating pressure regulating valve 13 is one kind by upstream pressure（That is evaporating pressure）The proportion differential regulating valve of control；Described
Recooler 4 is in flash evaporation.Other structures are same as Example 1.
Embodiment 3
The frequency conversion rolling rotor compressor of main road compressor 1 of the present invention, bypass compressor 14 compresses for frequency-changing cyclone formula
Machine；Described main road condenser 3 is that stacked heat exchanger, dehumidify evaporimeter 10 are parallel flow heat exchanger；Described first is swollen
Swollen valve 7 is float-ball type expansion valve, and the second expansion valve 9 is heating power expansion valve；Described circulating fan 21 is frequency conversion fan；Described
Evaporating pressure regulating valve 13 is one kind by upstream pressure（That is evaporating pressure）The PID regulating valve of control；It is described again
Cooler 4 is double-tube heat exchanger.Other structures are same as Example 1.
Embodiment 4
Main road compressor 1 and bypass compressor 14 of the present invention are inverter scroll compressor；Described main road condenser 3
It is stacked heat exchanger for stacked heat exchanger, dehumidify evaporimeter 10；Described the first expansion valve 7 and the heating power of the second expansion valve 9
Expansion valve；Described circulating fan 21 is frequency conversion fan；Described evaporating pressure regulating valve 13 is one kind by upstream pressure（Steam
Send out pressure）The proportion differential regulating valve of control；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 main road condenser 3, dehumidify evaporimeter 10 are fin-tube heat exchanger, and the first described expansion valve 7 is float-ball type
Expansion valve, the second expansion valve 9 is electric expansion valve, and described circulating fan 21 is frequency conversion fan, described evaporating pressure regulation
Valve 13 is one kind by upstream pressure（That is evaporating pressure）The proportion differential regulating valve of control, described recooler 4 is flash evaporation.Its
Its structure is same as Example 1.
Embodiment 6
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 main road condenser 3 is that parallel flow heat exchanger, dehumidify evaporimeter 10 are fin-tube heat exchanger, described
One expansion valve 7 is float-ball type expansion valve, and the second expansion valve 9 is electric expansion valve；Described circulating fan 21 is gear shift blower fan；Institute
The evaporating pressure regulating valve 13 stated is one kind by upstream pressure（That is evaporating pressure）The proportional integration regulating valve of control；It is described again
Cooler 4 is plate type heat exchanger.Other structures are same as Example 1.
Embodiment 7
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 main road condenser 3 and dehumidify evaporimeter 10 are stacked heat exchanger；The first described expansion valve 7 and second is swollen
Swollen valve 9 is float-ball type expansion valve；Described circulating fan 21 is frequency conversion fan；Described evaporating pressure regulating valve 13 for it is a kind of by
Upstream pressure（That is evaporating pressure）The ratio adjusting valve of control；Described recooler 4 is double-tube heat exchanger.Other structures are with implementing
Example 1 is identical.
Embodiment 8
Main road compressor 1 of the present invention is determines frequency scroll compressor, and bypass compressor 14 is to determine frequency rolling rotor-type pressure
Contracting machine；Described main road condenser 3 is that fin-tube heat exchanger, dehumidify evaporimeter 10 are stacked heat exchanger；Described first
Expansion valve 7 is hand expansion valve, and the second expansion valve 9 is float-ball type expansion valve；Described circulating fan 21 is frequency conversion fan；It is described
Evaporating pressure regulating valve 13 for one kind by upstream pressure（That is evaporating pressure）The ratio adjusting valve of control；Described recooler 4
For plate type heat exchanger.Other structures are same as Example 1.
The present invention operation principle be：Medium is dried by the pressure heat pump subsystem of solar energy-air three and closed type to follow
Five kinds of mode of operations can be achieved in the Optimized Matching combination of loop subsystems, programmable controller PLC Intelligent adjustment, the present invention：
（1）Direct expanding solar heating pump drying work pattern
Fig. 2 is direct expanding solar heating pump drying work model process figure, when outdoor solar radiation intensity is very big, 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 compressor
1st, the second electric control valve 19, circulating fan 21 start, bypass compressor 14, the first electric control valve 18, auxiliary PTC electrical heating
Device 20 is closed.The workflow of the pressure heat pump subsystem of solar energy-air three：The high pressure gaseous that main road compressor 1 is discharged
Refrigerant passes sequentially through main road oil eliminator 2, the first check valve 16 and enters main road condenser 3, and release heat is through circulated air
The circulation drying medium that machine 21 is introduced, is condensed into supercooling or saturation liquid refrigerant, then passes sequentially through recooler 4, dried
Filter 5, peephole 6 enter the first expansion valve 7, are changed into the gas-liquid two of medium temperature and medium pressure after the flow restriction control of the first expansion valve 7
Phase refrigerant, liquid/gas separator 8 of being calmed the anger in carries out gas-liquid separation, then in calm the anger the liquid refrigerant of the bottom of liquid/gas separator 8
It 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 the second electric control valve
19 enter solar thermal collector 11, absorb the energy of solar radiation, and 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.Dry the workflow of medium circulation subsystem：Come from
Medium is dried through circulating fan 21 into 22 between material drying in the high temperature low humidity of medium heating chamber 28, is discharged after heated material 23
Heat cools, while absorbing the moisture of material, is changed into low temperature, the drying medium of higher levels of humidity, then by the temperature in air channel
Spend after sensor 24, the detection of humidity sensor 25, then enter medium heating chamber 28 by moist chamber 26, be absorbed into main road condensation
Heated up after the latent heat of phase change of the gaseous refrigerant release of device 3, be changed into the drying medium of high temperature low humidity, start 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 outdoor solar radiation intensity is weaker, or
In drying materials running, when the drying humidity of media that temperature sensor 24, humidity sensor 25 are detected is excessive, this can be used
Mode of operation.Now main road compressor 1, the first electric control valve 18, auxiliary PTC electric heater 20, circulating fan 21 start, auxiliary
Road compressor 14, the second electric control valve 19 are closed.The workflow of the pressure heat pump subsystem of solar energy-air three：Main road pressure
The high temperature and high pressure gaseous refrigerant that contracting machine 1 is discharged passes sequentially through main road oil eliminator 2, the first check valve 16 and enters main road condenser
3, medium is dried in the circulation that release heat is introduced through circulating fan 21, is condensed into supercooling or saturation liquid refrigerant, then
Pass sequentially through recooler 4, device for drying and filtering 5, peephole 6 and enter the first expansion valve 7, by the flow restriction control of the first expansion valve 7
Be changed into the gas-liquid two-phase cold-producing medium of medium temperature and medium pressure afterwards, liquid/gas separator 8 of being calmed the anger in carries out gas-liquid separation, then in calm the anger liquid point
Liquid refrigerant from the bottom of device 8 is changed into the gas-liquid two-phase refrigeration of low-temp low-pressure after the flow restriction control of the second expansion valve 9 again
Agent, enters dehumidify evaporimeter 10 by the first electric control valve 18, absorbs the circulation introduced through circulating fan 21 and dries medium
Heat, evaporation is changed into the superheated refrigerant steam of low pressure, then carries out that gas-liquid separation is laggard to be become owner of through low-pressure gas-liquid separator 12
The air entry of road compressor 1, after the compression of main road compressor 1, discharges high temperature and high pressure gaseous refrigerant, initially enters next
Circulation.Dry the workflow of medium circulation subsystem：Come from the drying medium of high temperature low humidity of medium heating chamber 28 through following
Ring blower fan 21 enters 22 between material drying, and the cooling of release heat, while absorbing the moisture of material, is changed into low after heated material 23
The drying medium of warm high humidity, then after the temperature sensor 24 in air channel, humidity sensor 25 are detected, into moist chamber
26, the vapor that release heat enters in the gas-liquid two-phase cold-producing medium of dehumidify evaporimeter 10, drying medium becomes condensate
Separate out, and excluded by condensate outlet 27, then the drying medium of low temperature and low humidity enters medium heating chamber 28 through air channel, successively
Heated up step by step after absorbing the latent heat of phase change of the gaseous refrigerant release of main road condenser 3 and the heat of auxiliary PTC electric heater 20,
It is changed into the drying medium of high temperature low humidity, starts subsequent cycle.
（3）The pressure drying work pattern of direct-expansion type solar energy+three
Fig. 4 is the pressure drying work model process figure of direct-expansion type solar energy+three, when outdoor solar radiation intensity is larger, 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, bypass compressor 14, the second electric control valve 19, circulating fan 21 start, and the first electric control valve 18, auxiliary PTC electricity add
Hot device 20 is closed.The workflow of the pressure heat pump subsystem of solar energy-air three：The HTHP gas that main road compressor 1 is discharged
State refrigerant passes sequentially through main road oil eliminator 2, the first check valve 16 and the high pressure gaseous system by the second check valve 17
Cryogen is mixed, subsequently into main road condenser 3, and medium, condensation are dried in the circulation that release heat is introduced through circulating fan 21
For supercooling or saturation liquid refrigerant, discharged into the main road side of recooler 4 in middle pressure of the heat through the bypass side of recooler 4
The saturation gaseous refrigerant of temperature, further supercooling is changed into the larger liquid refrigerant of degree of supercooling, then passes sequentially through device for drying and filtering
5th, peephole 6 enters the first expansion valve 7, is changed into the gas-liquid two-phase system of medium temperature and medium pressure after the flow restriction control of the first expansion valve 7
Cryogen, liquid/gas separator 8 of being calmed the anger in is divided into two-way after carrying out gas-liquid separation, wherein being the full of the middle temperature of middle pressure isolated all the way
And liquid refrigerant, the bottom of liquid/gas separator 8 discharge of being calmed the anger in, then it is changed into again after the flow restriction control of the second expansion valve 9
The gas-liquid two-phase cold-producing medium of low-temp low-pressure, enters solar thermal collector 11 by the second electric control valve 19, absorbs solar energy spoke
The energy penetrated, evaporation is changed into the superheated refrigerant steam of low pressure, and it is laggard then to carry out gas-liquid separation through low-pressure gas-liquid separator 12
Enter the air entry of main road compressor 1, after the compression of main road compressor 1, discharge high temperature and high pressure gaseous refrigerant, initially enter
Subsequent cycle.Another road is 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,
Supercooling or saturation liquid refrigerant heat through the main road side of recooler 4 are absorbed into the bypass side of recooler 4, was changed into hot gaseous
Refrigerant, then pressure regulation is throttled into the air entry of bypass compressor 14 by evaporating pressure regulating valve 13, by bypass compressor
14 compression discharge high temperature and high pressure gaseous refrigerants, then pass sequentially through bypass oil eliminator 15, the second check valve 17 with by the
The high temperature and high pressure gaseous refrigerant mixing of one check valve 16, into main road condenser 3, initially enters subsequent cycle.Dry medium
The workflow of cycle 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 outdoor solar radiation intensity is larger, and material dries
In dry running, when the drying humidity of media that temperature sensor 24, humidity sensor 25 are detected is excessive, this Working mould can be used
Formula.Now main road compressor 1, bypass compressor 14, the first electric control valve 18, circulating fan 21 start, the second motorized adjustment
Valve 19, auxiliary PTC electric heater 20 are closed.The workflow of the pressure heat pump subsystem of solar energy-air three：Main road compressor 1
The high temperature and high pressure gaseous refrigerant of discharge passes sequentially through main road oil eliminator 2, the first check valve 16 and by the second check valve 17
High temperature and high pressure gaseous refrigerant mixing, subsequently into main road condenser 3, release heat is through following that circulating fan 21 is introduced
Ring dries medium, is condensed into supercooling or saturation liquid refrigerant, and heat is discharged through recooler into the main road side of recooler 4
The saturation gaseous refrigerant of the middle temperature of middle pressure of 4 bypass sides, further supercooling is changed into the larger liquid refrigerant of degree of supercooling, then successively
First expansion valve 7 is entered by device for drying and filtering 5, peephole 6, 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 is divided into two-way after carrying out gas-liquid separation, wherein being to isolate all the way
The middle temperature of middle pressure saturation liquid refrigerant, the bottom of liquid/gas separator 8 discharge of being calmed the anger in, then again by the second expansion valve 9
It is changed into the gas-liquid two-phase cold-producing medium of low-temp low-pressure after flow restriction control, dehumidify evaporimeter 10 is entered by the first electric control valve 18,
The heat that medium is dried in the circulation introduced through circulating fan 21 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 evaporating pressure regulating valve 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 main road
Condenser 3, initially enters subsequent cycle.Dry the workflow of medium circulation subsystem：Come from the height of medium heating chamber 28
The drying medium of warm low humidity is through circulating fan 21 into 22 between material drying, and the cooling of release heat, inhales simultaneously after heated material 23
The moisture of material has been received, has been changed into the drying medium of low temperature and high relative humidity, then by temperature sensor 24, the humidity sensor in air channel
After 25 detections, into moist chamber 26, release heat enters in the gas-liquid two-phase cold-producing medium of dehumidify evaporimeter 10, drying medium
Vapor become condensate precipitation, and excluded by condensate outlet 27, then the drying medium of low temperature and low humidity enters through air channel
Enter medium heating chamber 28, heated up after the latent heat of phase change for the gaseous refrigerant release for absorbing main road condenser 3, be changed into high temperature low humidity
Medium is dried, 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, and main road compressor 1, the first electric control valve 18, the second electric control valve 19 are closed.The sun
The workflow of the pressure heat pump subsystem of energy-air three：The high temperature and high pressure gaseous refrigerant that bypass compressor 14 is discharged leads to successively
Cross bypass oil eliminator 15, the second check valve 17 and enter main road condenser 3, release heat is through following that circulating fan 21 is introduced
Ring dries medium, is condensed into supercooling or saturation liquid refrigerant, and heat is discharged through recooler into the main road side of recooler 4
The saturation gaseous refrigerant of the middle temperature of middle pressure of 4 bypass sides, further supercooling is changed into the larger liquid refrigerant of degree of supercooling, then successively
First expansion valve 7 is entered by device for drying and filtering 5, peephole 6, 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, 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 evaporating pressure regulating valve 13
The air entry of road compressor 14, eventually passes the compression discharge high temperature and high pressure gaseous refrigerant of bypass compressor 14, initially enters down
One circulation.Dry the workflow of medium circulation subsystem：The high temperature low humidity for coming from medium heating chamber 28 dries medium through following
Ring blower fan 21 enters 22 between material drying, and the cooling of release heat, while absorbing the moisture of material, is changed into low after heated material 23
Temperature, the drying medium of higher levels of humidity, then after the temperature sensor 24 in air channel, humidity sensor 25 are detected, then pass through
Moist chamber 26 enters medium heating chamber 28, successively absorbs the latent heat of phase change and auxiliary of the gaseous refrigerant release of main road condenser 3
Heated up step by step after the heat of PTC electric heater 20, be changed into the drying medium of high temperature low humidity, start subsequent cycle.
Claims (7)
1. a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary, it is characterised in that：The closed type heat pump drying
System includes the pressure heat pump subsystem of solar energy-air three and closed type drying medium circulation subsystem；Solar energy-air three is pressed
Power heat pump subsystem includes main road compressor（1）, main road oil eliminator（2）, main road condenser（3）, recooler（4）, in calm the anger
Liquid/gas separator（8）, dehumidify evaporimeter（10）, solar thermal collector（11）, low-pressure gas-liquid separator（12）, bypass compressor
（14）, bypass oil eliminator（15）, the first check valve（16）, the second check valve（17）And connecting pipe；Closed type drying is situated between
Matter cycle subsystem includes auxiliary PTC electric heater（20）, between material drying（22）, material（23）, medium heating chamber（28）With
And connection air channel；The main road compressor（1）Exhaust outlet and main road oil eliminator（2）Connected, main road oil eliminator（2）With
One check valve（16）It is connected, the first check valve（16）Respectively with main road condenser（3）Import, the second check valve（17）Outlet
It is connected, the main road condenser（3）Outlet and recooler（4）Main road import be connected, recooler（4）Main road outlet
Calmed the anger with liquid/gas separator（8）Import be connected；Medium pressure gas-liquid separator（8）Two outlet respectively with recooler
（4）Bypass import and low-pressure gas-liquid separator（12）It is connected, low-pressure gas-liquid separator（12）Outlet and main road compressor
（1）Air entry be connected；The recooler（4）Bypass outlet pass through evaporating pressure regulating valve（13）Afterwards with bypass compressor
（14）Air entry be connected, bypass compressor（14）Exhaust outlet and bypass oil eliminator（15）Connected, bypass oil eliminator
（15）With the second check valve（17）Connection, the second check valve（17）Outlet and the first check valve（16）Outlet converge after, with
Main road condenser（3）Import be connected；The medium heating chamber（28）Main road condenser is inside installed（3）, auxiliary PTC electricity plus
Hot device（20）, medium heating chamber（28）Air outlet by connecting between air channel and material drying（22）Air inlet be connected；Institute
State between material drying（22）Lay material is inside installed（23）Shelf, between material drying（22）Air outlet and moist chamber（26）
Air inlet be connected by connecting air channel, moist chamber（26）Dehumidify evaporimeter is inside installed（10）And condensate outlet
（27）, moist chamber（26）Air outlet by connecting air channel and medium heating chamber（28）Air inlet be connected.
2. a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：
The pressure heat pump subsystem of solar energy-air three also includes device for drying and filtering（5）, peephole（6）, the first expansion valve（7）,
Two expansion valves（9）, evaporating pressure regulating valve（13）, the first electric control valve（18）With the second electric control valve（19）；Recooler
（4）Calmed the anger with liquid/gas separator（8）Between connecting pipe on be sequentially provided with device for drying and filtering（5）, peephole（6）It is swollen with first
Swollen valve（7）, in calm the anger liquid/gas separator（8）With the second expansion valve（9）Import be connected, the second expansion valve（9）Outlet difference
With the first electric control valve（18）, the second electric control valve（19）It is connected, the first electric control valve（18）With dehumidify evaporimeter
（10）It is connected, the second electric control valve（19）With solar thermal collector（11）Import be connected, dehumidify evaporimeter（10）With
Solar thermal collector（11）Outlet with low-pressure gas-liquid separator（12）Import be connected.
3. a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：
The closed type drying medium circulation subsystem also includes circulating fan（21）, temperature sensor（24）, humidity sensor（25）、
Moist chamber（26）And condensate outlet（27）, medium heating chamber（28）Between material drying（22）Between connection air channel in set
There is circulating fan（21）, between material drying（22）With moist chamber（26）Between connection air channel in temperature sensor is installed（24）
And humidity sensor（25）.
4. a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：
Connected between each structure of pressure heat pump subsystem of solar energy-air three by connecting pipe；Closed type dries medium circulation
It is connected between each structure of subsystem by connecting air channel；Described main road compressor（1）With bypass compressor（14）It is respectively fixed
Frequency scroll compressor, determine in frequency rolling rotor compressor, inverter scroll compressor, frequency conversion rolling rotor compressor
Any one form.
5. a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：
Described main road condenser（3）, dehumidify evaporimeter（10）Appointing respectively in fin tube type, stacked, parallel flow heat exchanger
Anticipate a kind of structure type；The first described expansion valve（7）With the second expansion valve（9）Respectively hand expansion valve, choke type expansion
Any one throttle mechanism form in valve, float-ball type expansion valve, heating power expansion valve, electric expansion valve.
6. a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 3, it is characterised in that：
Described circulating fan（21）For frequency conversion fan, any one form determined in frequency blower fan, gear shift blower fan.
7. a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：
Described evaporating pressure regulating valve（13）For a kind of ratio adjusting valve controlled by upstream pressure, proportional integration regulating valve, ratio
Any one adjuster form in differential regulating valve, PID regulating valve；Described recooler（4）For plate-type heat-exchange
Any one structure type in device, double-tube heat exchanger, flash evaporation.
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| CN110440530A (en) * | 2019-08-13 | 2019-11-12 | 江苏大学 | A kind of industrial exhaust heat composite solar greenhouse drying system and method |
| CN111351324A (en) * | 2020-04-09 | 2020-06-30 | 青岛科技大学 | Energy-saving drying and refrigerating system |
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