CN106989573A - A kind of closed type heat pump drying system with interior radiant heat transfer - Google Patents
A kind of closed type heat pump drying system with interior radiant heat transfer Download PDFInfo
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- CN106989573A CN106989573A CN201710392199.0A CN201710392199A CN106989573A CN 106989573 A CN106989573 A CN 106989573A CN 201710392199 A CN201710392199 A CN 201710392199A CN 106989573 A CN106989573 A CN 106989573A
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- bypass
- drying
- main road
- compressor
- heat pump
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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
- 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, and in particular to a kind of closed type heat pump drying system with interior radiant heat transfer.Including 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, main road condenser, recooler, device for drying and filtering, peephole, in calm the anger liquid/gas separator, evaporator, low-pressure gas-liquid separator, bypass compressor, bypass oil eliminator, bypass condenser and connecting pipe；Closed type drying medium circulation subsystem is included between auxiliary PTC electric heater, circulating fan, material drying, temperature sensor, humidity sensor, moist chamber, condensate outlet, medium heating chamber and connection air channel；The present invention solves the defect of existing heat pump drying technology, with drying efficiency is high, energy-conservation, the quality better of material drying and the features such as health, with extensive market application foreground and huge market potential, it is adaptable to a wide range of popularization and application.
Description
Technical field
The present invention relates to heat pump drying technology field, a kind of closed type heat pump with interior radiant heat transfer is particularly related to
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.
Current heat pump drying technology mainly uses heat cycles air, and the water of material is absorbed by way of heat convection
Point, reach the purpose of material drying, opposing heat transfer mode（Heat transfer, heat convection, radiation heat transfer）For, using single pair
Stream heat exchange heat pump drying mode, the Drying Rates of material drying are relatively low compared with slow and dehumidifying observable index, the product after drying materials
Matter is relatively poor.In addition, when being dried to dangerous material, peculiar smell material, moisture content high material and heat sensitive material, open circuit
The circulation drying medium mode of formula can not meet stoving process requirement.
The content of the invention
The purpose of the present invention is precisely in order to provide a kind of closed type heat pump drying system with interior radiant heat transfer, to solve
Environment is seriously polluted in existing stoving process, dehumidifying observable index is relatively low, operating cost is high, Drying Rates are slow, alternating temperature is adjusted more
Difficulty etc. protrudes 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 with interior radiant heat transfer, including three pressure air-cooled heat pump subsystems
Medium circulation subsystem is dried with closed type, three described pressure air-cooled heat pump subsystems include main road compressor, main road oil
From device, main road condenser, recooler, device for drying and filtering, peephole, the first expansion valve, in calm the anger liquid/gas separator, second expansion
Valve, evaporator, low-pressure gas-liquid separator, evaporating pressure regulating valve, bypass compressor, bypass oil eliminator, the first check valve,
Two check valves, bypass condenser and connecting pipe；The closed type drying medium circulation subsystem includes auxiliary PTC electrical heating
Between device, circulating fan, material drying, material, temperature sensor, humidity sensor, moist chamber, condensate outlet, medium add
Hot cell and connection air channel；The exhaust outlet of the main road compressor is connected with main road oil eliminator, main road oil eliminator passes through
One check valve is connected with the import of main road condenser；The main road import and the bypass that export respectively with recooler of main road condenser
The outlet of condenser is connected；The import that the main road of the recooler exports liquid/gas separator of being calmed the anger with 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
Mouth is connected with the bypass import of recooler and the import of the second expansion valve respectively, outlet and the evaporator phase of the second expansion valve
Even, evaporator is connected with low-pressure gas-liquid separator again, and low-pressure gas-liquid separator is connected with the air entry of main road compressor, described
The bypass outlet of recooler is connected by the air entry after evaporating pressure regulating valve with bypass compressor；The bypass compressor
Exhaust outlet be connected with bypass oil eliminator, bypass oil eliminator after the second check valve with the import of bypass condenser by being connected
Connect；Main road condenser, auxiliary PTC electric heater are successively installed, the air outlet of medium heating chamber leads in the medium heating chamber
Connection air channel is crossed with the air inlet of circulating fan to be connected；The air outlet of circulating fan is connected with the air inlet between material drying
Connect；Bypass condenser is installed, the air outlet of bypass condenser is by connecting air channel and moist chamber in the material drying
Air inlet is connected, temperature sensor and humidity sensor are provided with connection air channel therebetween；It is provided with the moist chamber
Evaporator and condensate outlet, the air outlet of moist chamber are connected by connecting air channel with the air inlet of medium heating chamber；Institute
Material drying is stated uniformly to be laid on the surface of bypass condenser.
Main road compressor and bypass compressor of the present invention are to determine frequency scroll compressor, determine frequency rolling rotor-type pressure
Any one form in contracting machine, inverter scroll compressor, frequency conversion rolling rotor compressor.Described main road condenser,
Evaporator is any one structure type in fin-tube heat exchanger, stacked heat exchanger, parallel flow heat exchanger.Described
First expansion valve and the second expansion valve are hand expansion valve, choke type expansion valve, float-ball type expansion valve, heating power expansion valve, electronics
Any one throttle mechanism form in expansion valve.Described bypass condenser is multilayer shelf-type heat exchanger, multilayer calandria
Any one structure type in heat exchanger, multilayer aluminum composite plate inflation type heat exchanger.Described circulating fan be frequency conversion fan,
Determine any one form in frequency blower fan, gear shift blower fan.Described evaporating pressure regulating valve is one kind by upstream pressure（Evaporate
Pressure）Appointing in the ratio adjusting valve of control, proportional integration regulating valve, proportion differential regulating valve, PID regulating valve
Anticipate 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 interior radiant heat transfer that the present invention is provided, its is novel, and unit design is excellent
Change is ingenious, passes through and bypass regulating system is matched on the basis of conventional heat pump drying system（It is main oily by bypass compressor, bypass
Separator, bypass condenser, recooler and evaporating pressure regulating valve etc. are constituted）, 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, while the drying materials mode that heat convection and radiant heat transfer are combined can also be realized,
Significantly improve the Drying Rates and dehumidifying observable index of material drying, it is ensured that layer color, quality and the fragrance of material drying.
（3）Medium mode is dried by the circulation of closed type, the air-cooled heat pump drying system realize to dangerous material,
The high efficiency drying of peculiar smell material, moisture content high material and heat sensitive material.
（4）A kind of closed type heat pump drying system with interior radiant heat transfer that the present invention is provided, solves existing heat pump
The defect of drying technology, with drying efficiency is high, energy-conservation, the quality better of material drying and the features such as health, therefore, it has wide
General 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 three pressure drying work model process figures.
Fig. 4 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 evaporator,
11 be low-pressure gas-liquid separator, and 12 be evaporating pressure regulating valve, and 13 be bypass compressor, and 14 be bypass oil eliminator, and 15 be
One check valve, 16 be the second check valve, and 17 be bypass condenser, and 18 be auxiliary PTC electric heater, and 19 be circulating fan, and 20 are
Between material drying, 21 be material, and 22 be temperature sensor, and 23 be humidity sensor, and 24 be moist chamber, and 25 be condensate discharge
Mouthful, 26 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 interior radiant heat transfer, the system is main by three
Pressure air-cooled heat pump subsystem and closed type drying medium circulation subsystem composition.Three wherein described pressure air-cooled heat pump subsystems
System is swollen by main road compressor 1, main road oil eliminator 2, main road condenser 3, recooler 4, device for drying and filtering 5, peephole 6, first
Swollen valve 7, in calm the anger liquid/gas separator 8, the second expansion valve 9, evaporator 10, low-pressure gas-liquid separator 11, evaporating pressure regulating valve 12,
Bypass compressor 13, bypass oil eliminator 14, the first check valve 15, the second check valve 16, bypass condenser 17 and connecting tube
Road is constituted.Its specific annexation：The exhaust outlet of the main road compressor 1 passes sequentially through main road oil eliminator 2, the first check valve
15 are connected with the import of main road condenser 3；The outlet of the main road condenser 3 respectively with the main road import of recooler 4 and auxiliary
The outlet of road condenser 17 is connected；The main road outlet of the recooler 4 passes sequentially through device for drying and filtering 5, peephole 6, first
Calmed the anger with the import of liquid/gas separator 8 of expansion valve 7 is connected；Two of medium pressure gas-liquid separator 8 outlets respectively with it is cold again
The bypass import of device 4, the import of the second expansion valve 9 are connected；The outlet of second expansion valve 9 pass sequentially through evaporator 10,
Low-pressure gas-liquid separator 11 is connected with the air entry of main road compressor 1；The bypass outlet of the recooler 4 passes through evaporating pressure
Regulating valve 12 is connected with the air entry of bypass compressor 13；The exhaust outlet of the bypass compressor 13 passes sequentially through bypass oil
It is connected from device 14, the second check valve 16 with the import of bypass condenser 17.Described closed type drying medium circulation subsystem
Between auxiliary PTC electric heater 18, circulating fan 19, material drying 20, material 21, temperature sensor 22, humidity sensor 23,
Moist chamber 24, condensate outlet 25, medium heating chamber 26 and connection air channel composition.Its specific installation annexation：It is described
Main road condenser 3, auxiliary PTC electric heater 18 are successively installed, its air outlet passes through air channel and circulation in medium heating chamber 26
The air inlet of blower fan 19 is connected；The air outlet of the circulating fan 19 is connected between material drying 20 air inlet；It is described
Bypass condenser 17 is installed, its air outlet is by being provided with temperature sensor 22, humidity sensor 23 in 20 between material drying
Air channel be connected with the air inlet of moist chamber 24；Evaporator 10 and condensate outlet 25 are installed in the moist chamber 24,
Its air outlet is connected by air channel with the air inlet of medium heating chamber 26；The material drying 21 is uniformly laid in bypass condensation
On the surface of device 17.
Main road compressor 1 of the present invention is determines frequency scroll compressor, and bypass compressor 13 is to determine frequency rolling-rotor
Formula compressor.Described main road condenser 3 is that fin-tube heat exchanger, evaporator 10 are stacked heat exchanger.Described first
Expansion valve 7 is hand expansion valve, and the second expansion valve 9 is hand expansion valve.Described bypass condenser 17 is multilayer shelf-type
Heat exchanger.Described circulating fan 19 is frequency conversion fan.Described evaporating pressure regulating valve 12 is one kind by upstream pressure（Steam
Send out pressure）The ratio adjusting valve of control.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 13 is frequency conversion rolling-rotor
Formula compressor.Described main road condenser 3 is that parallel flow heat exchanger, evaporator 10 are stacked heat exchanger.Described first
Expansion valve 7 is hand expansion valve, and the second expansion valve 9 is choke type expansion valve.Described bypass condenser 17 is compound for multilayer aluminum
Plate inflation type heat exchanger.Described circulating fan 19 is frequency conversion fan.Described evaporating pressure regulating valve 12 is one kind by before valve
Pressure（That is evaporating pressure）The proportional integration regulating valve of control.Described recooler 4 is flash evaporation.Other structures and embodiment 1
It is identical.
Embodiment 3
Main road compressor 1 of the present invention is inverter scroll compressor, and bypass compressor 13 is to determine frequency rolling rotor-type pressure
Contracting machine.Described main road condenser 3 is that stacked heat exchanger, evaporator 10 are fin-tube heat exchanger.The first described expansion
Valve 7 is electric expansion valve, and the second expansion valve 9 is heating power expansion valve.Described bypass condenser 17 is multilayer calandria heat exchanger.
Described circulating fan 19 is frequency conversion fan.Described evaporating pressure regulating valve 12 is one kind by upstream pressure（That is evaporating pressure）
The proportion differential regulating valve of control.Described recooler 4 is plate type heat exchanger.Other structures are identical with the structure of embodiment 1.
Embodiment 4
Main road compressor 1 of the present invention is inverter scroll compressor, and bypass compressor 13 is to determine frequency rolling rotor-type pressure
Contracting machine.Described main road condenser 3 is that stacked heat exchanger, evaporator 10 are fin-tube heat exchanger.The first described expansion
Valve 7 is float-ball type expansion valve, and the second expansion valve 9 is hand electric expansion valve.Described bypass condenser 17 is that multilayer calandria is changed
Hot device.Described circulating fan 19 is frequency conversion fan；Described evaporating pressure regulating valve 12 is one kind by upstream pressure（Evaporate
Pressure）The PID regulating valve of control.Described recooler 4 is double-tube heat exchanger.Other structures and the structure of embodiment 1
It is identical.
Embodiment 5
Main road compressor 1 of the present invention is frequency conversion rolling rotor compressor and bypass compressor 13 is to determine frequency vortex pressure
Contracting machine.Described main road condenser 3 is that stacked heat exchanger, evaporator 10 are 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 bypass condenser 17 exchanges heat for multilayer calandria
Device.Described circulating fan 19 is to determine frequency blower fan.Described evaporating pressure regulating valve 12 is one kind by upstream pressure（That is vapor pres- sure
Power）The proportion differential regulating valve of control.Described recooler 4 is plate type heat exchanger.Other structures are identical with the structure of embodiment 1.
The present invention principle be：The excellent of medium circulation subsystem is dried by three pressure air-cooled heat pump subsystems and closed type
Change matching combination, three kinds of mode of operations can be achieved in programmable controller PLC Intelligent adjustment, the present invention：
（1）Single stage compress drying work pattern
Fig. 2 is single stage compress drying work model process figure, can when outside air temperature is approximately between -5 DEG C ~ 45 DEG C
Using this mode of operation.Now main road compressor 1, circulating fan 19 start, bypass compressor 13, auxiliary PTC electric heater 18
Close.The workflow of three pressure air-cooled heat pump subsystems：The high temperature and high pressure gaseous refrigerant that main road compressor 1 is discharged leads to successively
Cross main road oil eliminator 2, the first check valve 15 and enter main road condenser 3, release heat is through following that circulating fan 19 is introduced
Ring dries medium, is condensed into supercooling or saturation liquid refrigerant, then passes sequentially through recooler 4, device for drying and filtering 5, peephole 6
Into the first expansion valve 7, it is changed into the gas-liquid two-phase cold-producing medium of medium temperature and medium pressure after the flow restriction control of the first expansion valve 7, enters
In calm the anger liquid/gas separator 8 carry out gas-liquid separation, then in calm the anger the bottom of liquid/gas separator 8 liquid refrigerant again by second expand
It is changed into the gas-liquid two-phase cold-producing medium of low-temp low-pressure after the flow restriction control of valve 9, absorbs and introduced through circulating fan 19 into evaporator 10
Circulation drying medium heat, evaporation is changed into the superheated refrigerant steam of low pressure, then carried out through low-pressure gas-liquid separator 11
Enter the air entry of main road compressor 1 after gas-liquid separation, after the compression of main road compressor 1, discharge high pressure gaseous system
Cryogen, initially enters subsequent cycle.Dry the workflow of medium circulation subsystem：The high temperature for coming from medium heating chamber 26 is low
Wet drying medium is through circulating fan 19 into 20 between material drying, and release heat cools after heated material 21, while absorbing thing
The moisture of material, is changed into the drying medium of low temperature and high relative humidity, is then detected by the temperature sensor 22 in air channel, humidity sensor 23
Afterwards, into moist chamber 24, the vapor that release heat enters in the gas-liquid two-phase cold-producing medium of evaporator 10, drying medium becomes
Separate out, and excluded by condensate outlet 25 into condensate, then low temperature and low humidity drying medium enters medium heating chamber through air channel
26, it is absorbed into after the latent heat of phase change of the gaseous refrigerant of main road condenser 3 release and heats up, the drying for being changed into high temperature low humidity is situated between
Matter, starts subsequent cycle.
（2）Three pressure drying work patterns
Fig. 3 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, this mode of operation can be used.Now main road compressor 1, bypass compressor 13, circulating fan 19 start, auxiliary PTC electricity
Heater 18 is closed.The workflow of three pressure air-cooled heat pump subsystems：The high pressure gaseous refrigeration that main road compressor 1 is discharged
Agent passes sequentially through main road oil eliminator 2, the first check valve 15 and enters main road condenser 3, and release heat is through return air fan 18
The circulation drying medium of introducing, is condensed into supercooling or saturation liquid refrigerant, then with coming from the supercooling of bypass condenser 17
Or the mixing of saturation liquid refrigerant, discharge middle pressure middle temperature of the heat through the bypass side of recooler 4 into the main road side of recooler 4
Saturation gaseous refrigerant, further supercooling is changed into the larger liquid refrigerant of degree of supercooling, then pass sequentially through device for drying and filtering 5,
Peephole 6 enters the first expansion valve 7, is changed into the gas-liquid two-phase refrigeration of medium temperature and medium pressure after the flow restriction control of the first expansion valve 7
Agent, 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 the saturation for the middle temperature of middle pressure isolated
Liquid refrigerant, the bottom of liquid/gas separator 8 discharge of being calmed the anger in, is then changed into low after the flow restriction control of the second expansion valve 9 again
The gas-liquid two-phase cold-producing medium of warm low pressure, the heat of the circulation drying medium introduced through circulating fan 19 is absorbed into evaporator 10,
Evaporation is changed into the superheated refrigerant steam of low pressure, and main road compression is entered after then carrying out gas-liquid separation through low-pressure gas-liquid separator 11
The air entry of machine 1, after the compression of main road compressor 1, discharges high temperature and high pressure gaseous refrigerant, initially enters 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, into recooler
4 bypass side absorbs supercooling or saturation liquid refrigerant heat through the main road side of recooler 4, is changed into overheating gaseous refrigerant, then
Pressure regulation is throttled into the air entry of bypass compressor 13 by evaporating pressure regulating valve 12, is compressed and is discharged by bypass compressor 13
High temperature and high pressure gaseous refrigerant, then passes sequentially through bypass oil eliminator 14, the second check valve 16 and enters bypass condenser 17, release
The material 21 of thermal discharge heating, drying storeroom 20, is condensed into supercooling or saturation liquid refrigerant, then with to come from main road cold
The supercooling of condenser 3 or the mixing of saturation liquid refrigerant, initially enter subsequent cycle.Dry the workflow of medium circulation subsystem
It is identical with single stage compress drying work pattern.
（3）Bypass+PTC drying work patterns
Fig. 4 is bypass+PTC drying work model process figures, and the middle and later periods is run in drying materials, and temperature sensor 22, humidity are passed
When the drying humidity of media that sensor 23 is detected is smaller, this mode of operation can be used.Now bypass compressor 13, auxiliary PTC electricity add
Hot device 18, circulating fan 19 start, and main road compressor 1 is closed.The workflow of three pressure air-cooled heat pump subsystems：Bypass compresses
The high temperature and high pressure gaseous refrigerant that machine 13 is discharged passes sequentially through bypass oil eliminator 14, the second check valve 16 and enters bypass condenser
17, release heat material drying between 20 material 21, be condensed into supercooling or saturation liquid refrigerant, into recooler 4
Main road side discharges the saturation gaseous refrigerant of middle pressure middle temperature of the heat through the bypass side of recooler 4, and further supercooling was changed into
The larger liquid refrigerant of cold degree, then device for drying and filtering 5, peephole 6 are passed sequentially through into the first expansion valve 7, it is swollen by first
It is changed into the gas-liquid two-phase cold-producing medium of medium temperature and medium pressure after the flow restriction control of swollen valve 7, liquid/gas separator 8 of being calmed the anger in carries out gas-liquid point
From 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-regulating valve 12 enters bypass compressor 13 is sent out, the compression discharge of bypass compressor 13 is eventually passed high
Warm high-pressure gaseous refrigerant, initially enters subsequent cycle.Dry the workflow of medium circulation subsystem：Come from medium heating
The high temperature low humidity drying medium of room 26 is through circulating fan 19 into 20 between material drying, and release heat cools after heated material 21,
A small amount of moisture of material is absorbed simultaneously, is changed into low temperature, the drying medium of higher levels of humidity, then by the TEMP in air channel
After device 22, humidity sensor 23 are detected, then by moist chamber 24 into medium heating chamber 26, auxiliary PTC electric heater 18 is absorbed
Heated up after the heat of release, be changed into the drying medium of high temperature low humidity, start subsequent cycle.
Claims (9)
1. a kind of closed type heat pump drying system with interior radiant heat transfer, it is characterised in that：Including three pressure air-cooled heat pumps
System and closed type drying medium circulation subsystem, three described pressure air-cooled heat pump subsystems include main road compressor（1）, it is main
Road binders separator（2）, main road condenser（3）, recooler（4）, in calm the anger liquid/gas separator（8）, the second expansion valve（9）, evaporator
（10）, low-pressure gas-liquid separator（11）, bypass compressor（13）, bypass oil eliminator（14）, the first check valve（15）, bypass it is cold
Condenser（17）And connecting pipe；The closed type drying medium circulation subsystem includes auxiliary PTC electric heater（18）, drying
Storeroom（20）, material（21）, moist chamber（24）With medium heating chamber（26）；The main road compressor（1）Exhaust outlet and master
Road binders separator（2）Connected, main road oil eliminator（2）Pass through the first check valve（15）With main road condenser（3）Import be connected
Connect；Main road condenser（3）Outlet respectively with recooler（4）Main road import and bypass condenser（17）Outlet be connected；
The recooler（4）Main road outlet calmed the anger liquid/gas separator with（8）Import be connected；Medium pressure gas-liquid separator（8）
Two outlet respectively with recooler（4）Bypass import and the second expansion valve（9）Import be connected, the second expansion valve（9）
Outlet and evaporator（10）It is connected, evaporator（10）Again with low-pressure gas-liquid separator（11）It is connected, low-pressure gas-liquid separator
（11）With main road compressor（1）Air entry be connected, the recooler（4）Bypass outlet with bypass compressor（13）Suction
Gas port is connected；The bypass compressor（13）Exhaust outlet and bypass oil eliminator（14）It is connected, bypass oil eliminator（14）
With bypass condenser（17）Import be connected；The medium heating chamber（26）Interior priority is provided with main road condenser（3）, auxiliary
PTC electric heater（18）, medium heating chamber（26）Air outlet and material drying between（20）Air inlet be connected；The drying
Storeroom（20）Bypass condenser is inside installed（17）, bypass condenser（17）Air outlet by connecting air channel and moist chamber
（24）Air inlet be connected；The moist chamber（24）It is interior to be provided with evaporator（10）, moist chamber（24）Air outlet pass through connection
Air channel and medium heating chamber（26）Air inlet be connected；Material（21）Uniformly it is laid in bypass condenser（17）Surface on.
2. a kind of closed type heat pump drying system with interior radiant heat transfer according to claim 1, it is characterised in that：Institute
The three pressure air-cooled heat pump subsystems stated also include device for drying and filtering（5）, peephole（6）, the first expansion valve（7）, evaporating pressure
Regulating valve（12）, the second check valve（16）, recooler（4）Calmed the anger with liquid/gas separator（8）Between adapter road on be sequentially provided with
Device for drying and filtering（5）, peephole（6）With the first expansion valve（7）, the recooler（4）Bypass outlet by evaporating pressure tune
Save valve（12）Afterwards with bypass compressor（13）Air entry be connected, bypass oil eliminator（14）Pass through the second check valve（16）Afterwards
With bypass condenser（17）Import be connected.
3. a kind of closed type heat pump drying system with interior radiant heat transfer according to claim 1, it is characterised in that：Institute
Stating closed type drying medium circulation subsystem also includes circulating fan（19）, temperature sensor（22）, humidity sensor（23）, it is solidifying
Bear water outlet（25）And connection air channel, medium heating chamber（26）Air outlet and material drying between（20）Between connection wind
Circulating fan is provided with road（19）；Bypass condenser（17）With moist chamber（24）Between connection air channel in be provided with temperature sensor
（22）And humidity sensor（23）, condensate outlet（25）Located at moist chamber（24）It is interior.
4. a kind of closed type heat pump drying system with interior radiant heat transfer according to claim 1, it is characterised in that：Institute
The main road compressor stated（1）With bypass compressor（13）Respectively 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（3）For wing
Any one structure type in Flat-tube type heat-exchanger, stacked heat exchanger, parallel flow heat exchanger；Evaporator（10）For fin
Any one structure type in pipe heat exchanger, stacked heat exchanger, parallel flow heat exchanger.
5. a kind of closed type heat pump drying system with interior radiant heat transfer according to claim 1, it is characterised in that：Institute
The first expansion valve stated（7）With the second expansion valve（9）Respectively hand expansion valve, choke type expansion valve, float-ball type expansion valve, heat
Any one throttle mechanism form in power expansion valve, electric expansion valve.
6. a kind of closed type heat pump drying system with interior radiant heat transfer according to claim 1, it is characterised in that：Institute
The bypass condenser stated（17）For multilayer shelf-type heat exchanger, multilayer calandria heat exchanger, the heat exchange of multilayer aluminum composite plate inflation type
Any one structure type in device.
7. a kind of closed type heat pump drying system with interior radiant heat transfer according to claim 3, it is characterised in that：Institute
The circulating fan stated（19）For frequency conversion fan, any one form determined in frequency blower fan, gear shift blower fan.
8. a kind of closed type heat pump drying system with interior radiant heat transfer according to claim 2, it is characterised in that：Institute
The evaporating pressure regulating valve stated（12）It is micro- for a kind of ratio adjusting valve controlled by upstream pressure, proportional integration regulating valve, ratio
Divide any one in regulating valve, PID regulating valve.
9. a kind of closed type heat pump drying system with interior radiant heat transfer according to claim 1, it is characterised in that：Institute
The recooler stated（4）For any one structure type in plate type heat exchanger, double-tube heat exchanger, flash evaporation.
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| CN201710392199.0A CN106989573B (en) | 2017-05-27 | 2017-05-27 | Closed-circuit type heat pump drying system with internal radiation heat transfer function |
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| CN112958413A (en) * | 2021-02-22 | 2021-06-15 | 江苏宇通干燥工程有限公司 | Drying oven for closed cycle and engine paint drying and working method thereof |
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| CN106989573B (en) | 2022-09-09 |
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