CN206944605U - The closed type heat pump drying system of direct-expansion type solar energy auxiliary - Google Patents
The closed type heat pump drying system of direct-expansion type solar energy auxiliary Download PDFInfo
- Publication number
- CN206944605U CN206944605U CN201720609992.7U CN201720609992U CN206944605U CN 206944605 U CN206944605 U CN 206944605U CN 201720609992 U CN201720609992 U CN 201720609992U CN 206944605 U CN206944605 U CN 206944605U
- Authority
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- China
- Prior art keywords
- drying
- valve
- main road
- heat pump
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001035 drying Methods 0.000 title claims abstract description 126
- 239000000463 material Substances 0.000 claims abstract description 52
- 230000001105 regulatory Effects 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims description 64
- 238000001704 evaporation Methods 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 9
- 239000003205 fragrance Substances 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 50
- 239000007789 gas Substances 0.000 description 20
- 239000003921 oil Substances 0.000 description 19
- 238000004781 supercooling Methods 0.000 description 13
- 239000011555 saturated liquid Substances 0.000 description 10
- 238000000926 separation method Methods 0.000 description 10
- 238000007906 compression Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000035943 smell Effects 0.000 description 2
- 206010040003 Sensation of pressure Diseases 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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- 239000002023 wood Substances 0.000 description 1
Abstract
Heat pump drying technology field is the utility model is related to, particularly relates to a kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary.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 utility model on the basis of heat pump drying system by matching solar thermal collector, dehumidify evaporimeter and bypass regulating system, solve environment in existing stoving process is seriously polluted, operating cost is high, Drying Rates are slow, dehumidifying the more low prominent technical problem of observable index, the efficiency of heat pump drying material is significantly improved, ensure that layer color, quality and the fragrance of material drying.
Description
Technical field
Heat pump drying technology field is the utility model is related to, particularly relates to the closed type heat of direct-expansion type solar energy auxiliary
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 kind 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
Prominent technical problem, has had a strong impact on popularization and application of the air source heat pump in drying field existing for heat pump.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.
Utility model content
The utility model provides the closed type heat pump drying system of direct-expansion type solar energy auxiliary, to solve existing drying work
The protrusion that environment is seriously polluted in skill, dehumidifying observable index is relatively low, operating cost is high, Drying Rates are slow, alternating temperature regulation is more difficult
Technical problem.
In order to solve the above technical problems, the utility model uses following technical scheme：
The utility model provides the closed type heat pump drying system of direct-expansion type solar energy auxiliary, 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 include 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,
Evaporating 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 includes auxiliary PTC electric heater, circulated air
Between machine, material drying, material, temperature sensor, humidity sensor, moist chamber, condensate outlet, medium heating chamber and company
Give a dinner for a visitor from afar；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 with main road condenser, the outlet of the second check valve are connected first check valve respectively, the outlet of the main road condenser
Be connected with the main road import of recooler, the outlet of the main road of recooler calmed the anger with liquid/gas separator import be connected, the two it
Between 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
The bypass import with recooler, the import of the second expansion valve are connected respectively for outlet, and the outlet of the second expansion valve is respectively with first
Electric control valve, the second electric control valve are connected, and the first electric control valve is connected with dehumidify evaporimeter, the second motorized adjustment
Valve 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 be connected, the outlet of low-pressure gas-liquid separator is connected with the air entry of main road compressor；The bypass of the recooler
Outlet is connected by the air entry after evaporating pressure regulating valve with bypass compressor, exhaust outlet and the bypass oil of bypass compressor
Separator is connected, bypass oil eliminator is connected with the second check valve, and the outlet of the second check valve converges with the outlet of the first check valve
After conjunction, the import with main road condenser is connected；Main road condenser, auxiliary PTC electrical heating are installed in the medium heating chamber
Device, the air outlet of medium heating chamber are connected by connecting air channel with the air inlet of circulating fan, the air outlet of circulating fan with
Air inlet between material drying is connected；The shelf for laying material is installed, going out between material drying in the material drying
Air port is connected with the air inlet of moist chamber by connecting air channel, temperature sensor is installed in connection air channel therebetween and
Humidity sensor, dehumidify evaporimeter and condensate outlet are installed in moist chamber, the air outlet of moist chamber is by connecting air channel
It is connected with the air inlet of medium heating chamber.
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.
The beneficial effects of the utility model are as follows：
The closed type heat pump drying system of direct-expansion type solar energy auxiliary provided by the utility model, its is novel, unit
Design optimization is ingenious, by matching solar thermal collector, dehumidify evaporimeter and bypass on the basis of conventional heat pump drying system
Regulating system（Mainly by groups such as bypass compressor, bypass oil eliminator, bypass condenser, recooler and evaporating pressure regulating valves
Into）, 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
It is prominent that condensing pressure is too high under mode of operation, compressor pressure ratios are excessive, the frequent protectiveness of excessive discharge temperature, compressor is shut down
Go wrong, evaporating temperature is too low, evaporator surface frosting is serious, compressor pressure under and can solution winter low temperature heating mode of operation
Contract the outstanding problem drastically declined than excessive, excessive discharge temperature, heating capacity and Energy Efficiency Ratio, improves air-cooled heat pump drying system
Unite annual reliability of operation, stability and economy, 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, ensure that layer color, the product of material drying
Matter and fragrance.
（3）Solar energy is as a kind of amount is big, aboundresources and green clean energy resource, when using solar thermal collector
During as heat pump drying system evaporator, the evaporating temperature of heat pump drying unit significantly improves so that the power consumption of heat pump compressor
Amount is reduced, while reduces 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）The closed type heat pump drying system of direct-expansion type solar energy auxiliary provided by the utility model, solves existing heat
The defects of pump drying technology, there is drying efficiency high, energy-conservation, the quality better of material drying and hygienic, therefore, it has
Extensive market application foreground and huge market potential, suitable for a wide range of popularization and application.
Brief description of the drawings
Fig. 1 is structure principle chart of the present utility model.
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, and 22 be between material drying, and 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 utility model is below with reference to embodiment（Accompanying drawing）It is described further, but is not intended to limit the utility model.
Embodiment 1
As shown in figure 1, the utility model provides the closed type heat pump drying system of direct-expansion type solar energy auxiliary, its feature exists
Mainly it is made up of in the system the pressure heat pump subsystem of solar energy-air three and closed type drying medium circulation subsystem.Wherein
The described pressure heat pump subsystem of solar energy-air three is by main road compressor 1, main road oil eliminator 2, main road condenser 3, cold again
Device 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,
Solar thermal 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.
Its specific annexation：The exhaust outlet of the main road compressor 1 passes sequentially through main road oil eliminator 2, the first check valve 16 is distinguished
Import, the outlet of the second check valve 17 with main road condenser 3 are connected；The outlet of the main road condenser 3 and recooler 4
Main road import is connected；The main road outlet of the recooler 4 pass sequentially through device for drying and filtering 5, peephole 6, the first expansion valve 7 with
In the calm the anger import of liquid/gas separator 8 be connected；Two of medium pressure gas-liquid separator 8 export the bypass with recooler 4 respectively
Import, the import of the second expansion valve 9 are connected；The outlet of second expansion valve 9 passes through the first electric control valve 18, respectively
Two electric control valves 19 are connected with the import of dehumidify evaporimeter 10, solar thermal collector 11；The dehumidify evaporimeter 10 and too
Import of the outlet of positive energy heat collector 11 with low-pressure gas-liquid separator 12 is connected；The outlet of the low-pressure gas-liquid separator 12
It is connected with the air entry of main road compressor 1；The bypass outlet of the recooler 4 passes through evaporating pressure regulating valve 13 and bypass pressure
The air entry of contracting machine 14 is connected；It is unidirectional that the exhaust outlet of the bypass compressor 14 passes sequentially through bypass oil eliminator 15, second
The import with main road condenser 3, the outlet of the first check valve 16 are connected valve 17 respectively.Described closed type drying medium circulation
Subsystem is passed by 22, material 23, temperature sensor 24, humidity between auxiliary PTC electric heater 20, circulating fan 21, material drying
Sensor 25, moist chamber 26, condensate outlet 27, medium heating chamber 28 and connection air channel composition.Its specific installation connection is closed
System：Main road condenser 3, auxiliary PTC electric heater 20 are successively installed, its air outlet passes through air channel in the medium heating chamber 28
It is connected with the air inlet of circulating fan 21；The air outlet of the circulating fan 21 is connected between material drying 22 air inlet
Connect；The shelf for laying material 23 is installed, its air outlet is by being provided with temperature sensor 24, wet in 22 between the material drying
The air channel of degree sensor 25 is connected with the air inlet of moist chamber 26；Dehumidify evaporimeter 10 is installed in the moist chamber 26 and coagulated
Outlet 27 is born water, its air outlet is connected by air channel with the air inlet of medium heating chamber 28.The solar energy-air three is pressed
Connected between each structure of power heat pump subsystem by connecting pipe；Pass through between closed type drying each structure of medium circulation subsystem
Connection air channel is connected.
Main road compressor 1 and bypass compressor 14 described in the utility model are to determine frequency rolling rotor compressor；It is described
Main road condenser 3 be fin-tube heat exchanger, dehumidify evaporimeter 10 be stacked heat exchanger；The first described expansion valve 7 is
Hand expansion valve, the second expansion valve 9 are choke type expansion valve；Described circulating fan 21 is frequency conversion fan；Described vapor pres- sure
Force regulating valve 13 is one kind by upstream pressure（That is evaporating pressure）The proportional integration regulating valve of control；Described recooler 4 is plate
Formula heat exchanger.
Embodiment 2
To determine frequency scroll compressor, bypass compressor 14 rolls main road compressor 1 described in the utility model for fixed frequency
Rotor-type compressor；Described main road condenser 3 is fin-tube heat exchanger, dehumidify evaporimeter 10 is parallel flow heat exchanger；
The first described 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
Determine frequency blower fan；Described evaporating pressure regulating valve 13 is one kind by upstream pressure（That is evaporating pressure）The proportion differential regulation of control
Valve；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 described in the utility model, bypass compressor 14 are frequency conversion whirlpool
Rotary compressor；Described main road condenser 3 is stacked heat exchanger, dehumidify evaporimeter 10 is parallel flow heat exchanger；It is described
The first expansion valve 7 be float-ball type expansion valve, the second expansion valve 9 is heating power expansion valve；Described circulating fan 21 is frequency conversion wind
Machine；Described evaporating pressure regulating valve 13 is one kind by upstream pressure（That is evaporating pressure）The PID regulation of control
Valve；Described recooler 4 is double-tube heat exchanger.Other structures are same as Example 1.
Embodiment 4
Main road compressor 1 and bypass compressor 14 described in the utility model are inverter scroll compressor；Described master
Road condenser 3 is stacked heat exchanger, dehumidify evaporimeter 10 is stacked heat exchanger；The first described expansion valve 7 and second is swollen
The swollen heating power expansion valve of valve 9；Described circulating fan 21 is frequency conversion fan；Described evaporating pressure regulating valve 13 is one kind before by valve
Pressure（That is evaporating pressure）The proportion differential regulating valve of control；Described recooler 4 is double-tube heat exchanger.Other structures are with implementing
Example 1 is identical.
Embodiment 5
Main road compressor 1 described in the utility model is inverter scroll compressor, and bypass compressor 14 rolls for fixed frequency
Rotor-type compressor；Described main road condenser 3, dehumidify evaporimeter 10 are fin-tube heat exchanger, the first described expansion valve 7
For float-ball type expansion valve, the second expansion valve 9 is electric expansion valve, and described circulating fan 21 is frequency conversion fan, described evaporation
Pressure-regulating valve 13 is one kind by upstream pressure（That is evaporating pressure）The proportion differential regulating valve of control, described recooler 4 are
Flash evaporation.Other structures are same as Example 1.
Embodiment 6
Main road compressor 1 described in the utility model is inverter scroll compressor, and bypass compressor 14 rolls for fixed frequency
Rotor-type compressor；Described main road condenser 3 is parallel flow heat exchanger, dehumidify evaporimeter 10 is fin-tube heat exchanger,
The first described expansion valve 7 is float-ball type expansion valve, and the second expansion valve 9 is electric expansion valve；Described circulating fan 21 is tune
Keep out the wind machine；Described evaporating pressure regulating valve 13 is one kind by upstream pressure（That is evaporating pressure）The proportional integration regulation of control
Valve；Described recooler 4 is plate type heat exchanger.Other structures are same as Example 1.
Embodiment 7
For main road compressor 1 described in the utility model to determine frequency rolling rotor compressor, bypass compressor 14 is frequency conversion
Scroll compressor；Described main road condenser 3 and dehumidify evaporimeter 10 are stacked heat exchanger；The first described expansion valve 7
It is float-ball type expansion valve with the second expansion valve 9；Described circulating fan 21 is frequency conversion fan；Described evaporating pressure regulating valve 13
It is one kind by upstream pressure（That is evaporating pressure）The ratio adjusting valve of control；Described recooler 4 is double-tube heat exchanger.Other knots
Structure is same as Example 1.
Embodiment 8
To determine frequency scroll compressor, bypass compressor 14 rolls main road compressor 1 described in the utility model for fixed frequency
Rotor-type compressor；Described main road condenser 3 is fin-tube heat exchanger, dehumidify evaporimeter 10 is stacked heat exchanger；Institute
The first expansion valve 7 stated is hand expansion valve, and the second expansion valve 9 is float-ball type expansion valve；Described circulating fan 21 is frequency conversion
Blower fan；Described evaporating pressure regulating valve 13 is one kind by upstream pressure（That is evaporating pressure）The ratio adjusting valve of control；It is described
Recooler 4 be plate type heat exchanger.Other structures are same as Example 1.
Operation principle of the present utility model is：It is situated between by the pressure heat pump subsystem of solar energy-air three and closed type drying
The Optimized Matching combination of matter cycle subsystem, programmable controller PLC Intelligent adjustment, the utility model can realize five kinds of Working moulds
Formula：
（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 pressure
Contracting machine 1, the second electric control valve 19, circulating fan 21 start, bypass compressor 14, the first electric control valve 18, auxiliary PTC electricity
Heater 20 is closed.The workflow of the pressure heat pump subsystem of solar energy-air three：The HTHP that main road compressor 1 is discharged
Gaseous refrigerant passes sequentially through main road oil eliminator 2, the first check valve 16 enters main road condenser 3, and release heat is through following
The circulation drying medium that ring blower fan 21 introduces, is condensed into supercooling or saturated liquid refrigerant, then passes sequentially through recooler 4, does
Dry filter 5, peephole 6 enter the first expansion valve 7, are changed into the gas of medium temperature and medium pressure after the flow restriction control of the first expansion valve 7
Liquid two phase refrigerant, liquid/gas separator 8 of being calmed the anger in carry out gas-liquid separation, then in calm the anger the liquid system of the bottom of liquid/gas separator 8
Cryogen 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 adjustable
Save valve 19 and enter solar thermal collector 11, absorb the energy of solar radiation, evaporation is changed into the superheated refrigerant steam of low pressure, so
By the air entry for entering main road compressor 1 after the progress gas-liquid separation of low-pressure gas-liquid separator 12, by the pressure of main road compressor 1
After contracting, high temperature and high pressure gaseous refrigerant is discharged, initially enters subsequent cycle.Dry the workflow of medium circulation subsystem：Come
Medium is dried through circulating fan 21 into 22 between material drying from the high temperature low humidity of medium heating chamber 28, is released after heated material 23
Thermal discharge cools, while absorbs the moisture of material, is changed into low temperature, the drying medium of higher levels of humidity, then by air channel
After temperature sensor 24, humidity sensor 25 detect, then by the entrance medium of moist chamber 26 heating chamber 28, it is cold to be absorbed into main road
Heated up after the latent heat of phase change of the gaseous refrigerant release of condenser 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 detect is excessive, it can adopt
With this mode of operation.Now main road compressor 1, the first electric control valve 18, auxiliary PTC electric heater 20, circulating fan 21 open
Dynamic, bypass compressor 14, the second electric control valve 19 are closed.The workflow of the pressure heat pump subsystem of solar energy-air three：It is main
It is cold into main road that the high temperature and high pressure gaseous refrigerant that road compressor 1 is discharged passes sequentially through main road oil eliminator 2, the first check valve 16
Condenser 3, the circulation drying medium that release heat introduces through circulating fan 21, is condensed into supercooling or saturated liquid refrigerant,
Then recooler 4, device for drying and filtering 5, peephole 6 are passed sequentially through and enters the first expansion valve 7, by the throttling of the first expansion valve 7
Be changed into the gas-liquid two-phase cold-producing medium of medium temperature and medium pressure after regulation, liquid/gas separator 8 of being calmed the anger in carry out gas-liquid separation, then in calm the anger
The liquid refrigerant of the bottom of liquid/gas separator 8 is changed into the gas-liquid two-phase of low-temp low-pressure after the flow restriction control of the second expansion valve 9 again
Refrigerant, dehumidify evaporimeter 10 is entered by the first electric control valve 18, absorb the circulation introduced through circulating fan 21 and dry Jie
The heat of matter, evaporation are 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.Dry the workflow of medium circulation subsystem：Come from the drying medium of the high temperature low humidity of medium heating chamber 28
Through circulating fan 21 into 22 between material drying, release heat cools after heated material 23, while absorbs the moisture of material, becomes
For the drying medium of low temperature and high relative humidity, then after the temperature sensor 24 in air channel, humidity sensor 25 detect, into dehumidifying
Room 26, release heat enter the gas-liquid two-phase cold-producing medium of dehumidify evaporimeter 10, and the vapor dried in medium becomes to condense
Elutriation goes out, and is excluded by condensate outlet 27, and then the drying medium of low temperature and low humidity enters medium heating chamber 28 through air channel, first
Risen 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 afterwards
Temperature, 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
When, and drying materials operation just starts, and when system does not need energy and humidity regulation, can use this mode of operation.Now lead
Road compressor 1, bypass compressor 14, the second electric control valve 19, circulating fan 21 start, the first electric control valve 18, auxiliary
PTC electric heater 20 is closed.The workflow of the pressure heat pump subsystem of solar energy-air three：The high temperature that main road compressor 1 is discharged
High-pressure gaseous refrigerant passes sequentially through main road oil eliminator 2, the first check valve 16 and the HTHP by the second check valve 17
Gaseous refrigerant mixes, and subsequently into main road condenser 3, the circulation drying that release heat introduces through circulating fan 21 is situated between
Matter, supercooling or saturated liquid refrigerant are condensed into, discharge heat through the bypass side of recooler 4 into the main road side of recooler 4
Middle pressure medium temperature saturation gaseous refrigerant, further supercooling is changed into the larger liquid refrigerant of degree of supercooling, then passes sequentially through dry
Dry filter 5, peephole 6 enter the first expansion valve 7, are changed into the gas of medium temperature and medium pressure after the flow restriction control of the first expansion valve 7
Liquid two phase refrigerant, liquid/gas separator 8 of being calmed the anger in are divided into two-way after carrying out gas-liquid separation, wherein the middle pressure to isolate all the way
The saturated liquid refrigerant of medium temperature, the bottom of liquid/gas separator 8 discharge of being calmed the anger in, is then adjusted by the throttling of the second expansion valve 9 again
It is changed into the gas-liquid two-phase cold-producing medium of low-temp low-pressure after section, solar thermal collector 11 is entered by the second electric control valve 19, absorbed
The energy of solar radiation, evaporation are changed into the superheated refrigerant steam of low pressure, then carry out gas-liquid through low-pressure gas-liquid separator 12
Enter the air entry of main road compressor 1 after separation, after the compression of main road compressor 1, discharge high temperature and high pressure gaseous refrigerant,
Initially enter subsequent cycle.Another way is the saturation gaseous refrigerant for the middle pressure medium temperature isolated, and is calmed the anger on liquid/gas separator 8
Portion discharges, and absorbs supercooling or saturated liquid refrigerant heat through the main road side of recooler 4 into the bypass side of recooler 4, is changed into
Gaseous refrigerant is overheated, then enters the air entry of bypass compressor 14 by the throttling pressure regulation of evaporating pressure regulating valve 13, process is auxiliary
The compression discharge high temperature and high pressure gaseous refrigerant of road compressor 14, then passes sequentially through bypass oil eliminator 15, the second check valve 17
Mixed with by the high temperature and high pressure gaseous refrigerant of the first check valve 16, into main road condenser 3, initially enter subsequent cycle.
The workflow for drying medium circulation subsystem is identical with single stage compress drying work pattern.
（4）Three pressure+dehumidifying drying mode of operation
Fig. 5 is three pressure+dehumidifying drying mode of operation flow chart, when outdoor solar radiation intensity is larger, and thing
In material drying running, when the drying humidity of media that temperature sensor 24, humidity sensor 25 detect is excessive, this work can be used
Operation mode.Now main road compressor 1, bypass compressor 14, the first electric control valve 18, circulating fan 21 start, and second is electronic
Regulating valve 19, auxiliary PTC electric heater 20 are closed.The workflow of the pressure heat pump subsystem of solar energy-air three：Main road compresses
The high temperature and high pressure gaseous refrigerant that machine 1 is discharged 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 introduces through circulating fan 21
Circulation drying medium, is condensed into supercooling or saturated liquid refrigerant, discharges heat through cold again into the main road side of recooler 4
The saturation gaseous refrigerant of the middle pressure medium temperature of the bypass side of device 4, further it is subcooled and is changed into the larger liquid refrigerant of degree of supercooling, then according to
It is secondary that first expansion valve 7 is entered by device for drying and filtering 5, peephole 6, it is changed into medium temperature after the flow restriction control of the first expansion valve 7
The gas-liquid two-phase cold-producing medium of middle pressure, liquid/gas separator 8 of being calmed the anger in are divided into two-way after carrying out gas-liquid separation, wherein being all the way separation
The saturated liquid refrigerant of the middle pressure medium temperature gone out, the bottom of liquid/gas separator 8 discharge of being calmed the anger in, then passes through the second expansion valve 9 again
Flow restriction control after be changed into the gas-liquid two-phase cold-producing medium of low-temp low-pressure, dehumidify evaporimeter is entered by the first electric control valve 18
10, the heat of the circulation drying medium introduced through circulating fan 21 is absorbed, evaporation is changed into the superheated refrigerant steam of low pressure, then
Enter the air entry of main road compressor 1 after low-pressure gas-liquid separator 12 carries out gas-liquid separation, by the compression of main road compressor 1
Afterwards, high temperature and high pressure gaseous refrigerant is discharged, initially enters subsequent cycle.Another way is the saturation gaseous state for the middle pressure medium temperature isolated
Refrigerant, the top of liquid/gas separator 8 discharge of being calmed the anger in, absorbs the supercooling through the main road side of recooler 4 into the bypass side of recooler 4
Or saturated liquid refrigerant heat, be changed into overheat gaseous refrigerant, then by evaporating pressure regulating valve 13 throttle pressure regulation enter it is auxiliary
The air entry of road compressor 14, discharge high temperature and high pressure gaseous refrigerant is compressed by bypass compressor 14, is then passed sequentially through auxiliary
Road binders separator 15, the second check valve 17 mix with by the high temperature and high pressure gaseous refrigerant of 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, into heat cooling is discharged 22 between material drying, after heated material 23, is inhaled simultaneously through circulating fan 21
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 the gas-liquid two-phase cold-producing medium of dehumidify evaporimeter 10, dries in 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, temperature sensor 24, wet
When the drying humidity of media that degree sensor 25 detects is smaller, this mode of operation can be used.Now bypass compressor 14, auxiliary PTC
Electric heater 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 workflow of the pressure heat pump subsystem of solar energy-air three：Bypass compressor 14 discharge high temperature and high pressure gaseous refrigerant according to
Secondary to enter main road condenser 3 by bypass oil eliminator 15, the second check valve 17, release heat introduces through circulating fan 21
Circulation drying medium, be condensed into supercooling or saturated liquid refrigerant, into recooler 4 main road side discharge heat through again
The saturation gaseous refrigerant of the middle pressure medium temperature of the bypass side of cooler 4, further supercooling are changed into the larger liquid refrigerant of degree of supercooling, then
Device for drying and filtering 5, the first expansion valve 7 of entrance of peephole 6 are passed sequentially through, in being changed into after the flow restriction control of the first expansion valve 7
The gas-liquid two-phase cold-producing medium of middle benefit gas pressure, liquid/gas separator 8 of being calmed the anger in carry out gas-liquid separation, the saturation for the middle pressure medium temperature isolated
Gaseous refrigerant, the top of liquid/gas separator 8 discharge of being calmed the anger in, absorbs through the main road side of recooler 4 into the bypass side of recooler 4
Supercooling or saturated liquid refrigerant heat, it is changed into overheating gaseous refrigerant, then enters by the throttling pressure regulation of evaporating pressure regulating valve 13
Enter the air entry of bypass compressor 14, finally by bypass compressor 14 compress discharge high temperature and high pressure gaseous refrigerant, start into
Enter subsequent cycle.Dry the workflow of medium circulation subsystem：Come from the high temperature low humidity drying medium of medium heating chamber 28
Through circulating fan 21 into 22 between material drying, release heat cools after heated material 23, while absorbs the moisture of material, becomes
For low temperature, the drying medium of higher levels of humidity, then after the temperature sensor 24 in air channel, humidity sensor 25 detect, then
Enter medium heating chamber 28 by moist chamber 26, successively absorb the gaseous refrigerant release of main road condenser 3 latent heat of phase change and
Heated up step by step after aiding in the heat of PTC electric heater 20, be changed into the drying medium of high temperature low humidity, start subsequent cycle.
Claims (7)
1. the 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
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（1）, main road oil eliminator（2）, main road condenser（3）, recooler（4）, in calm the anger liquid point
From device（8）, dehumidify evaporimeter（10）, solar thermal collector（11）, low-pressure gas-liquid separator（12）, bypass compressor（14）, it is auxiliary
Road binders separator（15）, the first check valve（16）, the second check valve（17）And connecting pipe；Closed type drying medium circulation
System includes auxiliary PTC electric heater（20）, between material drying（22）, material（23）, medium heating chamber（28）And connection wind
Road；The main road compressor（1）Exhaust outlet and main road oil eliminator（2）It is connected, main road oil eliminator（2）With the first check valve
（16）It is connected, the first check valve（16）Respectively with main road condenser（3）Import, the second check valve（17）Outlet be connected,
The main road condenser（3）Outlet and recooler（4）Main road import be connected, recooler（4）Main road outlet with middle pressure
Gas-liquid separator（8）Import be connected；Medium pressure gas-liquid separator（8）Two outlet respectively with recooler（4）It is auxiliary
Road import and low-pressure gas-liquid separator（12）It is connected, low-pressure gas-liquid separator（12）Outlet and main road compressor（1）Suction
Gas port is connected；The recooler（4）Bypass outlet pass through evaporating pressure regulating valve（13）Afterwards with bypass compressor（14）'s
Air entry is connected, bypass compressor（14）Exhaust outlet and bypass oil eliminator（15）It is connected, bypass oil eliminator（15）With
Second check valve（17）Connection, the second check valve（17）Outlet and the first check valve（16）Outlet converge after, it is cold with main road
Condenser（3）Import be connected；The medium heating chamber（28）Main road condenser is inside installed（3）, auxiliary PTC electric heater
（20）, medium heating chamber（28）Air outlet by connecting between air channel and material drying（22）Air inlet be connected；The baking
Between dry material（22）Lay material is inside installed（23）Shelf, between material drying（22）Air outlet and moist chamber（26）Enter
Air port is connected by connecting air channel, moist chamber（26）Dehumidify evaporimeter is inside installed（10）And condensate outlet（27）, remove
Moist chamber（26）Air outlet by connecting air channel and medium heating chamber（28）Air inlet be connected.
2. the closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：It is described
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）, it is second swollen
Swollen valve（9）, evaporating pressure regulating valve（13）, the first electric control valve（18）With the second electric control valve（19）；Recooler（4）With
In calm the anger liquid/gas separator（8）Between connecting pipe on be sequentially provided with device for drying and filtering（5）, peephole（6）With the first expansion 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 respectively with
One 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）And the sun
Can heat collector（11）Outlet with low-pressure gas-liquid separator（12）Import be connected.
3. the closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：It is described
Closed type drying medium circulation subsystem also includes, circulating fan（21）, temperature sensor（24）, humidity sensor（25）, remove
Moist chamber（26）And condensate outlet（27）, medium heating chamber（28）Between material drying（22）Between connection air channel in be provided with
Circulating fan（21）, between material drying（22）With moist chamber（26）Between connection air channel in temperature sensor is installed（24）With
Humidity sensor（25）.
4. the closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：It is described
Connected between each structure of pressure heat pump subsystem of solar energy-air three by connecting pipe；Closed type dries medium circulation subsystem
It is connected between each structure of uniting by connecting air channel；Described main road compressor（1）With bypass compressor（14）Respectively determine frequency whirlpool
Rotary compressor, determine it is any in frequency rolling rotor compressor, inverter scroll compressor, frequency conversion rolling rotor compressor
A kind of form.
5. the closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 2, it is characterised in that：It is described
Main road condenser（3）, dehumidify evaporimeter（10）It is respectively any one in fin tube type, stacked, parallel flow heat exchanger
Kind structure type；The first described expansion valve（7）With the second expansion valve（9）Respectively hand expansion valve, choke type expansion valve, floating
Any one throttle mechanism form in ball expansion valve, heating power expansion valve, electric expansion valve.
6. the closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 3, it is characterised in that：It is described
Circulating fan（21）For frequency conversion fan, determine any one form in frequency blower fan, gear shift blower fan.
7. the closed type heat pump drying system of direct-expansion type solar energy auxiliary according to claim 1, it is characterised in that：It is described
Evaporating pressure regulating valve（13）To be a kind of by the ratio adjusting valve of upstream pressure control, proportional integration regulating valve, proportion differential
Any one adjuster form in regulating valve, PID regulating valve；Described recooler（4）For plate type heat exchanger,
Any one structure type in double-tube heat exchanger, flash evaporation.
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Address after: 451191 No. 1 Huaihe Road, Shuang Hu Economic and Technological Development Zone, Xinzheng, Zhengzhou, Henan Patentee after: Zhongyuan University of Technology Address before: 451191 No. 1 Huaihe Road, Shuanghu Town Economic and Technological Development Zone, Zhengzhou City, Henan Province Patentee before: Zhongyuan University of Technology |