CN106524741A - Heat pump type double-circulation hot-air drying system and control method thereof - Google Patents
Heat pump type double-circulation hot-air drying system and control method thereof Download PDFInfo
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- CN106524741A CN106524741A CN201611170306.7A CN201611170306A CN106524741A CN 106524741 A CN106524741 A CN 106524741A CN 201611170306 A CN201611170306 A CN 201611170306A CN 106524741 A CN106524741 A CN 106524741A
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Classifications
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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
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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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
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a heat pump type double-circulation hot-air drying system and a control method thereof, and relates to supply or control devices for air or gas used for drying solid materials or products, in particular to a heat pump type hot-air drying system and a control method for the system. A hot air cabinet is divided into a basic air temperature area and a reheating area. A latent heat condenser and a sensible heat condenser are connected in series to form a double-section series condenser. An air supply circulation loop enters an air feeder from a drying chamber through an air return duct and the latent heat condenser and is supplied into the drying chamber through an air supply regulating valve, the sensible heat condenser and an air supply duct. An internal circulation loop returns to the air feeder from the air feeder through an internal circulation air valve, an internal circulation air duct, the air return duct and the latent heat condenser. By controlling the opening degrees of the internal circulation air valve and the air supply regulating valve, the internal circulation loop sufficiently absorbs condensation latent heat to increase the basic air temperature, secondary heat exchange is conducted through the air supply circulation loop for producing high-temperature hot air, and thus variation requirements of the outlet air temperature and the temperature of the drying chamber are met; and the heating efficiency of the system is high, and the product operating condition is stable.
Description
Technical field
The present invention relates to the supply of the air or gas of drying solid material or product or control device, more particularly to one
Plant heat-pump-type hot air drying system and the control method for the system.
Background technology
Need the place of hot-air seasoning more and more in the market, such as Nicotiana tabacum L. drying, grain heat-drying, medical material drying, fruit
The drying such as vegetable drying place, drying are mainly dried with coal stove, steam stove, electric furnace.Coal, gas are all non-renewable strategic performances
Source, is not direction that country promotes, and electric furnace is also not suitable for carrying out batch popularization because power consumption is big, operating cost is high.Northern country
All it is that heating is carried out with coal stove manufacture hot water before heating, country replaces coal stove to popularize in an all-round way using heat pump in rural area, it was demonstrated that
Heat pump still has very big market prospect in terms of heating.Heat pump also has very big sending out in the place of above-mentioned hot-air seasoning demand
Exhibition potentiality.By taking the baking equipment for preparatory treatment of tobacco of China as an example, traditional civil structure natural ventilation type barn is continued to use for a long time, although Jing is normal
There are some to improve transformation, but still without departing from traditional form.China was introduced with fuel oil, fire coal directly from the nineties in 20th century
The dense drying equipment of heat supply and boiler heat supplying, in various places, experiment and demonstration has reacted easy baking operating technology, saving recruitment, energy
Ensure the advantages such as baking quality of tobacco, but one-time investment is relatively costly, fuel consumption is larger, wants spread to have very at no distant date
Big difficulty, in practice it has proved that be not suitable for China's national situation, it is impossible to received by production.Tobacco flue-curing is an a large amount of heat dissipation process, general
Logical barn coal direct heating, heat utilization efficiency are low, and coal consumption is high, generally dry 1kg Nicotiana tabacum Lves coal consumption and mark coal in 1.5～2.5kg,
Environmental pollution is serious.A kind of Chinese invention patent " tobacco baking room with air source heat pump as thermal source " (patent of invention number：
200910044468.X, Authorization Notice No.：CN101940358B) disclose a kind of Nicotiana tabacum L. with air source heat pump as thermal source to bake
Room, including being provided with the heating chamber of fresh wind port and being provided with the hothouse of temperature, moisture probe, is provided with moisture exhausting port, also wraps above barn
The span of ratio of air source heat pump and condenser fan, condenser heat exchange area and compressor power input is included in 7-
Between 15m2/kw, condenser and its air draught type breeze fan device are indoor in the heating；The hothouse and/or heating chamber
It is provided with heat-insulation layer.The technical scheme makes air source heat pump using air source heat pump and solar energy as the novel heat source of tobacco baking room
Great expansion has been obtained with the range of application of solar energy, produce cigarette district promote the use of on a large scale can reduce air, soil and
The sulfur content of Nicotiana tabacum L., improves quality of tobacco, has positive effect to energy saving, environmental protection.But, in the Roaster of Nicotiana tabacum L.
In terms of skill, various places have researched and proposed " double low " baking process of five-part form, seven segmentations and six segmentations etc. in succession.Every kind of baking process
Tobacco flue-curing overall process is divided into into changing yellow stage, fixation stage, drying muscle stage all, having clear and definite humiture to refer to all is specified to each period
Mark, the multisection type stoving process figure of part kind Nicotiana tabacum L. shown in Figure 9.It is thin as baking process paragraph is divided more, especially
It is Nicotiana tabacum L. change is divided level it is many and obscure, non-quantitative, without simple clearly key point, technical sophistication, be not easy to slap
Hold, existing heat pump drying system can not similarly meet the requirement of tobacco roasting.
On the other hand, as some high temperature drying part-time sections need more than 80 DEG C of hot blast leaving air temp, how to carry
It is that heat-pump-type hot air drying system needs another problem for solving for high-temperature hot-air.A kind of Chinese invention patent application " superelevation
Warm heat pump drying system " (application for a patent for invention number：201510433292.2, publication number：CN105021015A) disclose one kind
Superhigh temperature heat pump drying system, including drying room, the air -return duct connected with the air outlet and return airway of the drying room, are arranged at back
Circulating fan in air channel, the exhausting duct connected with air -return duct are arranged at the air exhauster of the passway of exhausting duct, are arranged at return air
The air heat recovery device of the intersection of road and exhausting duct, and at least two sets source pump used in parallel；The invention is adopted
Two sets or more than two sets source pump parallel operations, at the drying operation process initial stage by the low-grade surrounding air heat pair of absorption
Drying room carries out heater riser temperature, and the hot and humid air to a certain extent afterwards to discharging in drying room that heats up dehumidifies, to which
In contained sensible heat and latent heat carry out maximized recovery.Cycle fluid temperature range of the system using two sets of source pump
Difference relatively higher wind pushing temperature is provided, while ensureing that the evaporating temperature of Drying unit is fully improved.But, the existing skill
Art scheme adopts two sets of source pump, and this not only causes drying room equipment investment to significantly improve, by cycle fluid temperature range
Difference improves the complexity that wind pushing temperature also add plant maintenance.Simultaneously as in drying course drying room heat consumption demand
Change is very big, and this does not only result in the frequent start-stop of source pump, increases the operation power consumption of unit, reduces the efficiency of unit, can also
Make the temperature change in drying room become big, or even quality that is excessive and affecting finished product can be changed because of drying temperature.
The content of the invention
The invention aims to a kind of heat-pump-type Two-way Cycle hot air drying system is provided, for solving existing heat pump hot blast
Drying system provides the technical problem existed during high-temperature hot-air.
The present invention solves the technical scheme that adopted of above-mentioned technical problem：
A kind of heat-pump-type Two-way Cycle hot air drying system, including source pump, hot blast rack and drying room, and for realizing
The control device of hot air drying system microprocessor control；It is characterized in that：
Described heat-pump-type Two-way Cycle hot air drying system also includes the heat that air-supply closed circuit and interior circulation loop are constituted
Wind double circulation loop；
Hot blast rack is divided into basic pathogenic wind-warm area and reheating heats up by the air-supply regulating valve that the hot blast interior of equipment cabinet is arranged
Area；
The latent heat condenser for being placed in basic pathogenic wind-warm area and the sensible heat condenser for being placed in reheating heating zone, by source pump
Refrigerant line is connected in series composition double series condenser；The high temperature liquid refrigerant that compressor is discharged, first sends into sensible heat cold
Latent heat condenser is re-fed into after condenser heat exchange cooling；
Described air-supply closed circuit enters hot blast rack from drying room Jing return airways, by being placed in basic pathogenic wind-warm area air intake
The latent heat condenser of side enters pressure fan, and then Jing air-supplies regulating valve reaches the sensible heat condenser of reheating heating zone, finally by
Supply air duct sends into drying room；
Described interior circulation loop enters interior circulation air channel from pressure fan exhaust outlet Jing interior circulations air-valve, then Jing return air wind
Road enters hot blast rack, reaches the latent heat condenser of basic pathogenic wind-warm area inlet side, eventually passes back to the air entry of pressure fan；
Described control device by control interior circulation air-valve and air-supply regulating valve aperture, adjust air-supply closed circuit and
The air circulation in interior circulation loop, controls the leaving air temp of hot blast rack.
One kind preferably technical scheme of the heat-pump-type Two-way Cycle hot air drying system of the present invention, it is characterised in that described
Source pump includes the major cycle pipeline of cold-producing medium and is connected to the two-way off-load branch road of major cycle pipeline；Described main circulation pipe
Road passes sequentially through sensible heat condenser, latent heat condenser, expansion valve, vaporizer, vapor-liquid separation from the beginning of the air vent of compressor
Device, returns to the air entry of compressor；Described two-way off-load route off-load electromagnetic valve, first throttle valve and second throttle connect
Connect composition：The entrance of the off-load electromagnetic valve is parallel-connected to the refrigerant pipe way outlet of latent heat condenser, the first throttle
The entrance of valve and second throttle is parallel-connected to the outlet of off-load electromagnetic valve, and the outlet of the first throttle valve is connected to evaporation
The entrance of device, the outlet of the second throttle are connected to the entrance of vapour liquid separator；Described control device is connected to first
Choke valve, second throttle and off-load electromagnetic valve, change the refrigerant circulation line of source pump according to leaving air temp dynamic, lead to
Crossing two-way off-load branch road reduces the delivery temperature and high side pressure of compressor, realizes the Two-way Cycle dynamic fortune of hot air drying system
Row mode.
A kind of superior technique scheme of the heat-pump-type Two-way Cycle hot air drying system of the present invention, it is characterised in that described
Two-way Cycle dynamic operational includes single cycle conventional heating pattern, Two-way Cycle blood pressure lowering off-load pattern, Two-way Cycle cooling off-load mould
Formula and Two-way Cycle two-way off-load pattern, wherein：
Single cycle conventional heating pattern：Off-load closed electromagnetic valve, cold-producing medium are circulated along major cycle pipeline；Interior circulation air-valve is opened
Degree 0%, control valve opening 100% of blowing, described Two-way Cycle hot air drying system produce out pathogenic wind-warm by closed circuit of blowing
Low temperature hot blast of the degree less than 45 DEG C；Described control device is controlled by the run time interval or running frequency for changing compressor
Leaving air temp；
Two-way Cycle blood pressure lowering off-load pattern：Off-load electromagnetic valve and second throttle are opened, and first throttle valve is closed, and cold-producing medium exists
While circulation along major cycle pipeline, a part of Jing off-loads electromagnetic valve is shunted and is directly entered vapor-liquid separation by second throttle
Device；Circulate in the wind valve opening 50% to 55%, control valve opening 50% to 45% of blowing；Described control device is sent by adjusting
The air circulation control leaving air temp in wind closed circuit and interior circulation loop, produces the middle warm that leaving air temp is 45 to 65 DEG C
Wind；
Two-way Cycle cooling off-load pattern：Off-load electromagnetic valve and first throttle valve are opened, and second throttle is closed, and cold-producing medium exists
While circulation along major cycle pipeline, a part of Jing off-loads electromagnetic valve shunting is simultaneously entered by the first throttle valve in parallel with expansion valve
Enter vaporizer；Circulate in the wind valve opening 55% to 65%, control valve opening 45% to 35% of blowing；Described control device passes through
The air circulation control leaving air temp in air-supply closed circuit and interior circulation loop is adjusted, is produced during leaving air temp is 65 to 75 DEG C
High-temperature hot-air；
Two-way Cycle two-way off-load pattern：Off-load electromagnetic valve and first throttle valve, second throttle are opened, and cold-producing medium is along main
While circulation line is circulated, the shunting of Jing off-loads electromagnetic valve, the cold-producing medium part after shunting is by parallel with expansion valve the
One choke valve enters vaporizer, and another part is directly entered vapour liquid separator by second throttle；Circulate in the wind valve opening
65% to 75%, control valve opening 35% to 25% of blowing；Described control device is by adjusting air-supply closed circuit and interior following
The air circulation control leaving air temp of loop back path, produces high-temperature hot-air of the leaving air temp higher than 75 DEG C.
A kind of improved technical scheme of the heat-pump-type Two-way Cycle hot air drying system of the present invention, it is characterised in that described
Source pump also includes the second refrigerant circulation line using frequency-changeable compressor；It is connected in second refrigerant circulation line
3rd condenser is arranged in hot blast rack, is placed in the air side in the basic pathogenic wind-warm area；As the demand heat consumption ＜ of drying room
When 40%, invariable frequency compressor stops, and frequency-changeable compressor starts, and heat pump hot air drying system is run with conventional inverter heat pump mode；
When demand heat consumption >=40% of drying room, invariable frequency compressor and frequency-changeable compressor start simultaneously, heat pump hot air drying system with
Fixed frequency+frequency conversion double parallel mode operation；When the design temperature of air-supply is higher than 75 DEG C, heat pump hot air drying system is with Two-way Cycle
Two-way off-load mode operation, the three-level of described latent heat condenser, the 3rd condenser and sensible heat condenser formation hot blast rack are changed
Heat structure；The circulating current in interior circulation loop passes through latent heat condenser and the 3rd condenser is exchanged heat twice, further improves basis
The basic pathogenic wind-warm in pathogenic wind-warm area, makes the leaving air temp of hot blast rack bring up to more than 75 DEG C.
Another object of the present invention is to provide for a kind of control for above-mentioned heat-pump-type Two-way Cycle hot air drying system
Method.The present invention solves the technical scheme that adopted of above-mentioned technical problem：
A kind of heat pump hot air drying system control method for above-mentioned heat-pump-type Two-way Cycle hot air drying system, its feature
It is to comprise the following steps：
S100：Configuration temperature control parameter, preserves default temperature control parameter of curve；
S200：Detection and monitoring leaving air temp and drying room humiture；
S300：According to default temperature control curve dynamic adjustment design temperature；
S400：The Two-way Cycle dynamic operational of system is selected according to current design temperature.
One kind preferably technical scheme of the heat-pump-type Two-way Cycle hot air drying system control method of the present invention, its feature exist
Include following control operation action in described step S400：
S420：If 45 DEG C of design temperature ＜, off-load electromagnetic valve is closed, into single cycle conventional heating pattern；According to air-out
The run time interval of temperature control compressor or running frequency；
S440：If 65 DEG C of design temperature ＜, off-load electromagnetic valve and second throttle are opened, close first throttle valve, entered
Two-way Cycle blood pressure lowering off-load pattern；Leaving air temp is controlled by adjusting the air circulation of air-supply closed circuit and interior circulation loop；
S460：If design temperature >=75 DEG C, S480 is gone to step；Otherwise, off-load electromagnetic valve and second throttle are opened, is closed
First throttle valve, into Two-way Cycle cooling off-load pattern；By the air circulation for adjusting air-supply closed circuit and interior circulation loop
Control leaving air temp；
S480：Off-load electromagnetic valve and first throttle valve and second throttle are opened, into Two-way Cycle two-way off-load pattern；It is logical
Overregulate the air circulation control leaving air temp in air-supply closed circuit and interior circulation loop.
The invention has the beneficial effects as follows：
1st, heat-pump-type Two-way Cycle hot air drying system of the invention and its control method, by setting up in Wind Volume circulation
Closed circuit, the condensation latent heat for fully absorbing cold-producing medium improve basic pathogenic wind-warm, and Jing air-supply closed circuit secondary heat exchanges produce high temperature
Hot blast；Using two-way air quantity auto-adjustment control air-out volume, it is ensured that leaving air temp drying room temperature change demand；System heating effect
Rate is high, and product operating condition is stable.
2nd, heat-pump-type Two-way Cycle hot air drying system of the invention and its control method, cold using latent heat condenser and sensible heat
The double series condenser that condenser is composed in series carries out heat exchange, produces basis by the latent heat condenser circulation in interior circulation loop
Pathogenic wind-warm, by blow closed circuit sensible heat condenser directly-heated produce high-temperature hot-air, can just make out pathogenic wind-warm without the need for electrical heating
Degree reaches 90 DEG C.
3rd, heat-pump-type Two-way Cycle hot air drying system of the invention and its control method, using multi-segment type temperature control curved configuration
Drying room temperature control parameter, according to temperature control curve dynamic adjustment design temperature, and selects system according to current adjustment design temperature
Operational mode, control Two-way Cycle hot air drying system realize fully-automatic intelligent run, without the need for manual control；Baking can be met
During temperature, humidity high-precision control require.
Description of the drawings
Fig. 1 is the double circulation structure schematic diagram of heat-pump-type Two-way Cycle hot air drying system；
Fig. 2 is the source pump schematic diagram of heat-pump-type Two-way Cycle hot air drying system；
Fig. 3 is that heat-pump-type Two-way Cycle hot air drying system determines frequency frequency conversion double circulation structure schematic diagram；
Fig. 4 is the source pump schematic diagram of frequency conversion capability-variable heat pump hot air drying system；
Fig. 5 is the schematic diagram of the control device of heat pump hot air drying system；
Fig. 6 is the control method flow chart of heat-pump-type Two-way Cycle hot air drying system；
Fig. 7 is the control method flow chart of frequency conversion capability-variable heat pump hot air drying system；
Fig. 8 is multi-segment type temperature control curve and temperature control parameter configuration interface schematic diagram；
Fig. 9 is the multisection type stoving process figure of part kind Nicotiana tabacum L. flue-cured tobacco；
Figure 10 is each period heat consumption curve chart during flue-cured tobacco.
The reference of each part in above figure：1 is compressor, and 1-1 is invariable frequency compressor, and 1-2 is frequency-changeable compressor, 2-
1 be the first condenser, 2-2 be the second condenser, 2-3 be the 3rd condenser, 21 be latent heat condenser, 22 be sensible heat condenser, 3
For expansion valve, 3-1 is the first expansion valve, and 3-1A is the first balance pipe, and 3-1B is the first temperature-sensitive bag, and 3-2 is the second expansion valve, 3-
2A is the second balance pipe, and 3-2B is the second temperature-sensitive bag, and 4 is vaporizer, and 4-1 is the first vaporizer, and 4-2 is the second vaporizer, 4-3
For the 3rd vaporizer, 5 is vapour liquid separator, and 5-1 is the first gas-liquid separator, and 5-2 is the second gas-liquid separator, and 6 is vaporizer
Blower fan, 7-1 are the first solenoid valve block, and 7-2 is the second solenoid valve block, and 8 is pressure fan, and 10 is first throttle valve, and 11 is second section
Stream valve, 12 is off-load electromagnetic valve, and 23 is interior circulation air-valve, and 24 are air-supply regulating valve, and 100 is source pump, and 200 is hot-air blower
Cabinet, 210 is supply air duct, and 220 is interior circulation air channel, and 230 is return airway, and 400 is drying room, and 500 is control device, and 510 are
Operating parameter setting module, 520 is drying room temperature and humidity monitor module, and 521 is dry-bulb temperature sensor, and 522 pass for wet bulb temperature
Sensor, 530 is wind pushing temperature monitoring module, and 531 is leaving air temp sensor, and 540 is valve area controller, and 550 is heat pump
Generator set controller.
Specific embodiment
For better understanding of the above-mentioned technical proposal of the present invention, carry out with reference to the accompanying drawings and examples further
Describe in detail.Fig. 1 is one embodiment of heat-pump-type Two-way Cycle hot air drying system, including source pump 100, hot blast rack
200 and drying room 400, and for realizing the control device 500 of hot air drying system microprocessor control；As shown in figure 1, described
Heat-pump-type Two-way Cycle hot air drying system also include air-supply closed circuit and interior circulation loop constitute hot blast double circulation loop；
The air-supply regulating valve 24 arranged inside the hot blast rack 200, based on hot blast rack 200 is separated pathogenic wind-warm area and
Reheating heating zone；
The latent heat condenser 21 for being placed in basic pathogenic wind-warm area and the sensible heat condenser 22 for being placed in reheating heating zone, by heat pump machine
The refrigerant line of group 100 is connected in series composition double series condenser；The high temperature liquid refrigerant that compressor is discharged, first sends into
Latent heat condenser 21 is re-fed into after the heat exchange cooling of sensible heat condenser 22；
Described air-supply closed circuit enters hot blast rack 200 from 400 Jing return airways 230 of drying room, by being placed in basis
The latent heat condenser 21 of pathogenic wind-warm area inlet side enters pressure fan 8, and then Jing air-supplies regulating valve 24 reaches the sensible heat of reheating heating zone
Condenser 22, sends into drying room 400 finally by supply air duct 210；
Described interior circulation loop enters interior circulation air channel 220, Ran Houjing from 8 exhaust outlet Jing interior circulations air-valve 23 of pressure fan
Return airway 230 enters hot blast rack 200, reaches the latent heat condenser 21 of basic pathogenic wind-warm area inlet side, eventually passes back to pressure fan 8
Air entry；The air-flow in basic pathogenic wind-warm area is entered from drying room 400, a part is transmitted back to return airway by interior circulation air channel 220
230, latent heat condenser 21 is sent to after mixing with drying room return air, the interior circulation loop of Wind Volume circulation is formed, another part Jing send
Wind regulating valve 24 is sent to sensible heat condenser 22 and carries out secondary heat exchange, and sends into drying room 400 by supply air duct 210, forms little wind
The air-supply closed circuit of amount circulation.Latent heat in cold-producing medium is little by little transferred to the big of interior circulation loop by latent heat condenser 21
In air quantity circulating current, basic pathogenic wind-warm is improved by the condensation latent heat for fully absorbing cold-producing medium；Compressor discharge temperature is up to 130
DEG C gaseous refrigerant in sensible heat, 22 secondary heat exchange of Jing sensible heats condenser be transferred to air-supply closed circuit little air quantity circulating air
In stream；Sensible heat condenser 22 can absorb 30% or so system heat energy, and the leaving air temp of hot blast rack 200 can be made to reach 90
℃。
Described control device 500 is adjusted air-supply and is followed by the aperture for controlling interior circulation air-valve 23 with regulating valve 24 of blowing
Loop back path and the air circulation in interior circulation loop, control the leaving air temp of hot blast rack 200.
The embodiment of the source pump of the heat-pump-type Two-way Cycle hot air drying system according to Fig. 2, described heat pump machine
Group 100 includes the major cycle pipeline of cold-producing medium and is connected to the two-way off-load branch road of major cycle pipeline；Described major cycle pipeline
From the beginning of the air vent of compressor 1, sensible heat condenser 22, latent heat condenser 21, expansion valve 3, vaporizer 4 and vapour-liquid are passed sequentially through
Separator 5, returns to the air entry of compressor 1；Described two-way off-load route off-load electromagnetic valve 12, first throttle valve 10 and the
The connection composition of two choke valve 11：The entrance of the off-load electromagnetic valve 12 is parallel-connected to the refrigerant line of latent heat condenser 21 and goes out
Mouthful, the entrance of the first throttle valve 10 and second throttle 11 is parallel-connected to the outlet of off-load electromagnetic valve 12, and described first
The outlet of choke valve 10 is connected to the entrance of vaporizer 4, and the outlet of the second throttle 11 is connected to entering for vapour liquid separator 5
Mouthful；Described control device 500 is connected to first throttle valve 10, second throttle 11 and off-load electromagnetic valve 12, according to going out pathogenic wind-warm
Degree dynamic changes the refrigerant circulation line of source pump, reduces the delivery temperature and height of compressor 1 by two-way off-load branch road
Pressure lateral pressure, realizes the Two-way Cycle dynamic operational of hot air drying system.
One embodiment of heat-pump-type Two-way Cycle hot air drying system of the invention, described Two-way Cycle dynamic operation
Pattern includes single cycle conventional heating pattern, Two-way Cycle blood pressure lowering off-load pattern, Two-way Cycle cooling off-load pattern and Two-way Cycle two-way
Off-load pattern, wherein：
Single cycle conventional heating pattern：Off-load electromagnetic valve 12 cuts out, and cold-producing medium is circulated along major cycle pipeline；Interior circulation air-valve
23 apertures 0%, 24 aperture 100% of regulating valve of blowing, described Two-way Cycle hot air drying system are produced by closed circuit of blowing
Low temperature hot blast of the leaving air temp less than 45 DEG C；Described control device 500 is by changing the run time interval of compressor 1 or transporting
Line frequency controls leaving air temp；
Two-way Cycle blood pressure lowering off-load pattern：Off-load electromagnetic valve 12 and second throttle 11 are opened, and first throttle valve 10 is closed, system
While circulating along major cycle pipeline, a part of Jing off-loads electromagnetic valve 12 is shunted and is directly entered by second throttle 11 cryogen
Enter vapour liquid separator 5, to reduce high side pressure；23 aperture 50% to 55% of interior circulation air-valve, 24 aperture of regulating valve of blowing
50% to 45%；Described control device 500 is controlled out by adjusting the air circulation of air-supply closed circuit and interior circulation loop
Air temperature, produces the middle warm wind that leaving air temp is 45 to 65 DEG C；
Two-way Cycle cooling off-load pattern：Off-load electromagnetic valve 12 and first throttle valve 10 are opened, and second throttle 11 is closed, system
While circulating along major cycle pipeline, a part of Jing off-loads electromagnetic valve 12 is shunted and by parallel with expansion valve 3 cryogen
One choke valve 10 enters vaporizer 4, to reduce delivery temperature；23 aperture 55% to 65% of interior circulation air-valve, regulating valve 24 of blowing
Aperture 45% to 35%；Air circulation control of the described control device 500 by regulation air-supply closed circuit and interior circulation loop
Air temperature is made, the high temperature hot blast that leaving air temp is 65 to 75 DEG C is produced；
Two-way Cycle two-way off-load pattern：Off-load electromagnetic valve 12 and first throttle valve 10, second throttle 11 are opened, cold-producing medium
While circulating along major cycle pipeline, Jing off-loads electromagnetic valve 12 is shunted, cold-producing medium after a shunting part by with expansion valve 3
First throttle valve 10 in parallel enters vaporizer 4, and another part is directly entered vapour liquid separator 5 by second throttle 11；It is interior
Circulation 23 aperture 65% to 75% of air-valve, 24 aperture 35% to 25% of regulating valve of blowing；Described control device 500 is by adjusting
The air circulation control leaving air temp in air-supply closed circuit and interior circulation loop, produces high warm of the leaving air temp higher than 75 DEG C
Wind.
It is big for the heat consumption changes in demand of drying room in drying course, cause what the frequent start-stop of unit and efficiency reduced to ask
Topic, in one embodiment of the heat pump hot air drying system of the present invention, described source pump 100 is also included using frequency conversion pressure
The second refrigerant circulation line of contracting machine；The 3rd condenser 2-3 being connected in second refrigerant circulation line is arranged on hot blast
In rack 200, the air side in the basic pathogenic wind-warm area is placed in, referring to Fig. 3；As the demand heat consumption ＜ 40% of drying room, fixed frequency
Compressor stops, and frequency-changeable compressor starts, and heat pump hot air drying system is run with conventional inverter heat pump mode；When the demand of drying room
During heat consumption >=40%, invariable frequency compressor and frequency-changeable compressor start simultaneously, and heat pump hot air drying system is determining frequency+frequency conversion two-shipper
Paralleling model runs；When the design temperature of air-supply is higher than 75 DEG C, heat pump hot air drying system is with Two-way Cycle two-way off-load pattern
Operation, the three-level of described latent heat condenser 21, the 3rd condenser 2-3 and the formation hot blast of sensible heat condenser 22 rack 200 exchange heat
Structure；The circulating current in interior circulation loop passes through latent heat condenser 21 and the 3rd condenser 2-3 is exchanged heat twice, further improves base
The basic pathogenic wind-warm in plinth pathogenic wind-warm area, makes the leaving air temp of hot blast rack 200 bring up to more than 75 DEG C.
One embodiment of the source pump of frequency conversion capability-variable heat pump hot air drying system is as shown in figure 4, described heat pump
Unit 100 includes invariable frequency compressor 1-1 and frequency-changeable compressor 1-2, and what is be connected in parallel determines frequency circulation line and frequency conversion circulation line,
And the heat exchanger transfiguration branch road being connected with 7-2 controls by the first solenoid valve block 7-1 and the second solenoid valve block；Described determines frequency
Circulation line from the beginning of the air vent of invariable frequency compressor 1-1, pass sequentially through the first condenser 2-1, the first expansion valve 3-1, first
Vaporizer 4-1 and the first gas-liquid separator 5-1, returns to the air entry of invariable frequency compressor 1-1；Described frequency conversion circulation line is from change
The air vent of frequency compressor 1-2 starts, and passes sequentially through the 3rd condenser 2-3, the second expansion valve 3-2, the 3rd vaporizer 4-3 and
Two gas-liquid separator 5-2, return to the air entry of frequency-changeable compressor 1-2；Described heat exchanger transfiguration branch road includes the second condenser
2-2 and the second vaporizer 4-2, the second described condenser 2-2 are parallel-connected to the first condenser by the first solenoid valve block 7-1
2-1, is parallel-connected to the 3rd condenser 2-3 by the second solenoid valve block 7-2；The second described vaporizer 4-2 is electric by first
Magnet valve group 7-1 is parallel-connected to the first vaporizer 4-1, is parallel-connected to the 3rd vaporizer 4-3 by the second solenoid valve block 7-2；
Described control device 500 is connected to the first solenoid valve block 7-1 and the second solenoid valve block 7-2, by controlling the first solenoid valve block
The opening state of 7-1 and the second solenoid valve block 7-2, changes the connected mode of heat exchanger transfiguration branch road, controls heat pump hot-air seasoning
System enters two-shipper transfiguration operational mode；Described control device 500 controls frequency-changeable compressor 1-2's according to air-out design temperature
Running frequency；The frequency conversion capability-variable heat pump hot air drying system of the present invention, expanding heat exchanger by varying capacity operational mode (includes
Vaporizer and condenser) heat exchange area, can significantly improve the overall heat exchange effect of source pump 100, improve system energy efficiency.
One embodiment of frequency conversion capability-variable heat pump hot air drying system of the invention, described two-shipper transfiguration operation
Pattern includes frequency conversion constant volume pattern, and frequency conversion varying capacity pattern determines frequency varying capacity+frequency conversion constant volume parallel running mode, frequency conversion
Constant volume pattern+frequency conversion varying capacity parallel running mode, and determine frequency constant volume+frequency conversion varying capacity parallel running mode, wherein：
Frequency conversion constant volume pattern：Frequency-changeable compressor 1-2 starts, and cold-producing medium is circulated along frequency conversion circulation line, the first electromagnetic valve
Group 7-1 and the second solenoid valve block 7-2 are turned off；
Frequency conversion varying capacity pattern：Frequency-changeable compressor 1-2 starts, and cold-producing medium is circulated along frequency conversion circulation line；First electromagnetic valve
Group 7-1 is closed, and the second solenoid valve block 7-2 is opened, and described heat exchanger transfiguration branch circuit parallel connection is connected to frequency conversion circulation line, frequency conversion
Compressor 1-2 enters varying capacity operational mode；
Determine frequency varying capacity+frequency conversion constant volume parallel running mode：Invariable frequency compressor 1-1 and frequency-changeable compressor 1-2 is opened simultaneously
Dynamic, frequency circulation line and the circulation of frequency conversion circulation line two-way are determined in edge to cold-producing medium simultaneously；First solenoid valve block 7-1 is opened, and second is electric
Magnet valve group 7-2 is closed, and described heat exchanger transfiguration branch circuit parallel connection is connected to determines frequency circulation line, and invariable frequency compressor 1-1 is entered and become
Capacity operational mode；
Determine frequency constant volume+frequency conversion varying capacity parallel running mode：Invariable frequency compressor 1-1 and frequency-changeable compressor 1-2 is opened simultaneously
Dynamic, frequency circulation line and the circulation of frequency conversion circulation line two-way are determined in edge to cold-producing medium simultaneously；First solenoid valve block 7-1 is closed, and second is electric
Magnet valve group 7-2 is opened, and described heat exchanger transfiguration branch circuit parallel connection is connected to frequency conversion circulation line, and frequency-changeable compressor 1-2 is entered and become
Capacity operational mode.
According to the embodiment of a heat pump hot air drying system for being preferred for needing higher drying temperature, the hot-air blower
Cabinet 200 includes basic pathogenic wind-warm area and the reheating heating zone being separated to form by air-supply regulating valve 24；Described the first condenser 2-1 and
The refrigerant line of the second condenser 2-2 is connected in series composition double series condenser；First condenser 2-1 is condensed as sensible heat
Device is placed in reheating heating zone, and the second condenser 2-2 is placed in the inlet side in basic pathogenic wind-warm area, the 3rd condenser as latent heat condenser
2-3 is placed in the air side in basic pathogenic wind-warm area；Described hot blast rack 200 arranges the interior circulation loop in the basic pathogenic wind-warm area of connection, ginseng
See Fig. 3；The hot blast of heat pump hot air drying system output, by interior circulation loop and the secondary heat exchange of air-supply closed circuit, uses
Air temperature can reach 90 DEG C.
One embodiment of the control device 500 of the heat-pump-type Two-way Cycle hot air drying system of the present invention is as shown in figure 5, bag
Include for configuring temperature control parameter and preserving the operating parameter setting module 510 of default temperature control parameter of curve, for detection and
The drying room temperature and humidity monitor module 520 and wind pushing temperature monitoring module 530 of monitoring leaving air temp and drying room humiture, for driving
The valve area controller 540 of air-valve, and for controlling the source pump controller 550 of compressor and electromagnetic valve；The baking
The input of room temperature and humidity monitor module 520, is connected to operating parameter setting module 510, dry-bulb temperature sensor 521 and wet bulb
Temperature sensor 522；The outfan of the drying room temperature and humidity monitor module 520 is connected to source pump controller 550；Heat pump machine
The outfan of group controller 550 is connected to the control electromagnetic valve in compressor and refrigerant line；The wind pushing temperature monitors mould
The input of block 530, is connected to operating parameter setting module 510 and leaving air temp sensor 531；The wind pushing temperature monitors mould
The outfan of block 530 is connected to valve area controller 540, and the outfan of valve area controller 540 is connected to circulate in the wind
Valve 23 and air-supply regulating valve 24.Described control electromagnetic valve includes the off-load electromagnetic valve 12, first being connected in refrigerant line
Choke valve 10, second throttle 11, the first solenoid valve block 7-1 and the second solenoid valve block 7-2.
One embodiment of heat-pump-type Two-way Cycle hot air drying system of the invention, described control device 500 are adopted
Programme-control, described operation ginseng are realized with the chip microprocessor with multi-channel A/D translation interfaces and multi-channel PWM output interface
Number setting module 510, drying room temperature and humidity monitor module 520 and wind pushing temperature monitoring module 530 are the software that microprocessor is provided
Functional module；Described dry-bulb temperature sensor 521, leaving air temp sensor 531 and wet bulb temperature sensor 522 pass through micro- place
The A/D translation interfaces of reason device are connected to chip microprocessor；Described control device 500 is exported using the PWM of microprocessor, is
Valve area controller 540 provides valve area controlled output signal, and provides frequency conversion pressure by source pump controller 550
The VFC output signal of contracting machine and frequency conversion fan；Described control device 500 is defeated using the PIO program to ports of microprocessor
Go out the switch output signal of electromagnetic valve and compressor, by source pump controller 550 to the compressor and electromagnetic valve in system
Perform on-off control.
The embodiment of the heat pump hot air drying system control method of the present invention according to Fig. 6, comprises the following steps：
S100：Configuration temperature control parameter, preserves default temperature control parameter of curve；
S200：Detection and monitoring leaving air temp and drying room humiture；
S300：According to default temperature control curve dynamic adjustment design temperature；
S400：The Two-way Cycle dynamic operational of system is selected according to current design temperature.
Embodiment 1：
One embodiment of multi-segment type temperature control curve and temperature control parameter configuration interface is as shown in figure 8, in the embodiment
Multi-segment type temperature control curve be 10 segmentation heating curves, control device 500 is by configuring the design temperature of each time period and steady
Warm time, control Two-way Cycle hot air drying system realize that automatic intelligent runs, without the need for manual control.
The embodiment of the heat-pump-type Two-way Cycle hot air drying system control method of the present invention according to Fig. 6, it is described
Step S400 includes following control operation action：
S420：If 45 DEG C of design temperature ＜, off-load electromagnetic valve 12 is closed, into single cycle conventional heating pattern；This pattern
The aperture of lower interior circulation air-valve 23 is 0%, and the aperture of regulating valve 24 of blowing is 100%；Compressor 1 is controlled according to leaving air temp
Run time is spaced or running frequency；The temperature control scope of this step the corresponding to 10 segmentation heating curves shown in Fig. 8 the 1st to 5
Section, setting leaving air temp are respectively 20 DEG C, 25 DEG C, 30 DEG C, 35 DEG C and 40 DEG C.
S440：If design temperature is 65 DEG C of ＜, off-load electromagnetic valve 12 and second throttle 11 are opened, close first throttle valve
10, into Two-way Cycle blood pressure lowering off-load pattern；Air-out is controlled by adjusting the air circulation of air-supply closed circuit and interior circulation loop
Temperature；Under this pattern, the aperture of interior circulation air-valve 23 is 40～60%, and the aperture of regulating valve 24 of blowing is 60～40%；This step
Temperature control scope corresponding to the 6th section and the 7th section of 10 segmentation heating curves shown in Fig. 8, respectively 50 DEG C of setting leaving air temp
With 60 DEG C, the aperture of corresponding interior circulation air-valve 23 is respectively 50% and 55%, and the aperture of regulating valve 24 of blowing is respectively 50%
With 45%.
S460：If design temperature >=75 DEG C, S480 is gone to step；Otherwise, off-load electromagnetic valve 12 and second throttle 11 are opened,
First throttle valve 10 is closed, into Two-way Cycle cooling off-load pattern；Followed by adjusting air-supply closed circuit and interior circulation loop
Ring Boiler pressure control leaving air temp；Under this pattern, the aperture of interior circulation air-valve 23 is 55～65%, and the aperture of regulating valve 24 of blowing is
45～35%；The 8th section corresponding to 10 segmentation heating curves shown in Fig. 8 of the temperature control scope of this step, set leaving air temp as
70 DEG C, corresponding interior circulation air-valve 23 is respectively 60% and 40% with the aperture of air-supply regulating valve 24.
S480：Off-load electromagnetic valve 12 and first throttle valve 10 and second throttle 11 are opened, into Two-way Cycle two-way off-load
Pattern；Leaving air temp is controlled by adjusting the air circulation of air-supply closed circuit and interior circulation loop；Circulate in the wind under this pattern
The aperture of valve 23 is 60～80%, and the aperture of regulating valve 24 of blowing is 40～20%.The temperature control scope of this step corresponds to Fig. 8 institutes
The 9th section and the 10th section of the 10 segmentation heating curves for showing, setting leaving air temp are respectively 80 DEG C and 90 DEG C, corresponding circulate in the wind
The aperture of valve 23 is respectively 65% and 75%, and the aperture of regulating valve 24 of blowing is respectively 35% and 25%.
Embodiment 2：
The size of certain Nicotiana tabacum L. drying room is：8 × 2.8 × 2.2m, first drying Nicotiana tabacum L. amount are 350 bars, per bar 30kg Nicotiana tabacum Lves, are closed
Meter 10500kg.Frequency conversion capability-variable heat pump hot air drying system is by one 6 invariable frequency compressor 1-1 and 6 frequency-changeable compressors
1-2 is in parallel to be constituted, and maximum heating capacity 50kW, the frequency conversion varying capacity attachment structure of unit are as shown in Figure 4.The temperature control of flue-cured tobacco process is bent
Line multisection type stoving process figure shown in Figure 9, each period heat consumption are as shown in Figure 10.Described control device 500 leads to
Cross relative analyses and select suitable operational mode, to reach maximum operational efficiency.
The embodiment of the frequency conversion capability-variable heat pump hot air drying system control method of the present invention according to Fig. 7, it is described
The step of S300 the demand heat consumption of present period is set according to default temperature control curve dynamic；In the present embodiment.Demand heat dissipation
The heat consumption of amount present period drying room unit interval is represented with the percentage ratio of source pump maximum heating capacity；
Described step S400 selects the two-shipper transfiguration operational mode of system according to the demand heat consumption of present period, including
Following control operation action：
S420：If demand heat consumption ＜ 25%, start frequency-changeable compressor 1-2, close the first solenoid valve block 7-1 and second electric
Magnet valve group 7-2, into frequency conversion constant volume pattern；The temperature control scope of this step is corresponding to the Nicotiana tabacum L. drying shown in Fig. 9-fixed Huang phase
The first half stage, the 0～10h of baking time in Figure 10, the heat consumption of drying room is 10kw；Frequency-changeable compressor 1-2 is transported with 20Hz frequencies
OK.
S440：If demand heat consumption ＜ 35%, start frequency-changeable compressor 1-2, close the first solenoid valve block 7-1, open the
Two solenoid valve blocks 7-2, into frequency conversion varying capacity pattern；The temperature control scope of this step is corresponding to the Nicotiana tabacum L. drying shown in Fig. 9-fixed Huang
The rear half stage of phase, the 10～60h of baking time in Figure 10, the heat consumption of drying room is 15kw；Frequency-changeable compressor 1-2 is with 30Hz frequencies
Rate is run.The first stage (fixed Huang phase) is dried in Nicotiana tabacum L., it is desirable to which the temperature in drying room is maintained between 35～38 DEG C, now negative
Lotus is relatively small, can preferably meet the demand of Nicotiana tabacum L. fixed Huang phase by the pattern.
S460：If demand heat consumption >=70%, goes to step S480；Otherwise, while starting invariable frequency compressor 1-1 and frequency conversion pressure
Contracting machine 1-2, opens the first solenoid valve block 7-1, closes the second solenoid valve block 7-2, enters and determines frequency varying capacity+frequency conversion constant volume parallel connection
Operational mode；The temperature control scope of this step corresponding to the Nicotiana tabacum L. drying-fixation stage shown in Fig. 9, baking time in Figure 10 60～
80h, the heat consumption of drying room is 15～35kw, and the condenser of invariable frequency compressor 1-1 and evaporator capacity increase, obtain maximum and heat
Amount；Frequency-changeable compressor 1-2 is run with 30～50Hz frequencies.
S480：Simultaneously start invariable frequency compressor 1-1 and frequency-changeable compressor 1-2, close the first solenoid valve block 7-1, open the
Two solenoid valve blocks 7-2, enter and determine frequency constant volume+frequency conversion varying capacity parallel running mode.The temperature control scope of this step corresponds to Fig. 9
The first half stage of shown Nicotiana tabacum L. drying-fixation stage and drying muscle stage, the 80～120h of baking time in Figure 10, the heat consumption of drying room
For 35～50kw, leaving air temp will be controlled at 65～68 DEG C, and wet bulb temperature is controlled at 40～43 DEG C；Require that blade contains through baking
The water yield is 5%～6%, vein water content 7%～8%；Frequency-changeable compressor 1-2 is run with 50～100Hz frequencies, maximum load amount
Operating mode under disclosure satisfy that Nicotiana tabacum L. drying heat demand.Now, invariable frequency compressor 1-1 is as good as with common operation conditions, mainly
Play the effect of increase overall heat exchange amount.Dual system parallel running solve traditional Drying unit be unable to reach high leaving air temp and
Electrically heated drawback need to be introduced, system operation efficiency is greatly improved.
Those of ordinary skill in the art is it should be appreciated that the embodiment of the above is intended merely to illustrate the present invention's
Technical scheme, and be not used as limitation of the invention, any connotation based on the present invention is to embodiment described above
The change made, modification, will all fall in the scope of the claims of the present invention.
Claims (5)
1. a kind of heat-pump-type Two-way Cycle hot air drying system, including source pump, hot blast rack and drying room, and for realizing heat
The control device of wind drying system microprocessor control, it is characterised in that：
Described heat-pump-type Two-way Cycle hot air drying system also includes that the hot blast that air-supply closed circuit and interior circulation loop are constituted is double
Closed circuit；
Hot blast rack is divided into basic pathogenic wind-warm area and reheating heating zone by the air-supply regulating valve that the hot blast interior of equipment cabinet is arranged；
The latent heat condenser for being placed in basic pathogenic wind-warm area and the sensible heat condenser for being placed in reheating heating zone, by the refrigeration of source pump
Agent pipeline is connected in series composition double series condenser；The high temperature liquid refrigerant that compressor is discharged, first sends into sensible heat condenser
Latent heat condenser is re-fed into after heat exchange cooling；
Described air-supply closed circuit enters hot blast rack from drying room Jing return airways, by being placed in basic pathogenic wind-warm area inlet side
Latent heat condenser enters pressure fan, and then Jing air-supplies regulating valve reaches the sensible heat condenser of reheating heating zone, finally by air-supply
Send into drying room in air channel；
Described interior circulation loop enters interior circulation air channel from pressure fan exhaust outlet Jing interior circulations air-valve, and then Jing return airways enter
Enter hot blast rack, reach the latent heat condenser of basic pathogenic wind-warm area inlet side, eventually pass back to the air entry of pressure fan；
Described control device adjusts air-supply closed circuit and interior follows by controlling the aperture of interior circulation air-valve and air-supply regulating valve
The air circulation of loop back path, controls the leaving air temp of hot blast rack.
2. heat-pump-type Two-way Cycle hot air drying system according to claim 1, it is characterised in that described source pump bag
The major cycle pipeline for including cold-producing medium and the two-way off-load branch road for being connected to major cycle pipeline；Described major cycle pipeline is from compressor
Air vent start, pass sequentially through sensible heat condenser, latent heat condenser, expansion valve, vaporizer, vapour liquid separator, return to compression
The air entry of machine；Described two-way off-load route off-load electromagnetic valve, first throttle valve and second throttle connection composition：It is described
The entrance of off-load electromagnetic valve is parallel-connected to the refrigerant pipe way outlet of latent heat condenser, the first throttle valve and the second throttling
The entrance of valve is parallel-connected to the outlet of off-load electromagnetic valve, and the outlet of the first throttle valve is connected to the entrance of vaporizer, institute
The outlet for stating second throttle is connected to the entrance of vapour liquid separator；Described control device is connected to first throttle valve, and second
Choke valve and off-load electromagnetic valve, change the refrigerant circulation line of source pump according to leaving air temp dynamic, by two-way off-load
Branch road reduces the delivery temperature and high side pressure of compressor, realizes the Two-way Cycle dynamic operational of hot air drying system.
3. heat-pump-type Two-way Cycle hot air drying system according to claim 2, it is characterised in that described Two-way Cycle dynamic
Operational mode includes single cycle conventional heating pattern, Two-way Cycle blood pressure lowering off-load pattern, Two-way Cycle cooling off-load pattern and Two-way Cycle
Two-way off-load pattern, wherein：
Single cycle conventional heating pattern：Off-load closed electromagnetic valve, cold-producing medium are circulated along major cycle pipeline；Circulate in the wind valve opening
0%, control valve opening 100% of blowing, described Two-way Cycle hot air drying system produce leaving air temp by closed circuit of blowing
Low temperature hot blast less than 45 DEG C；Described control device is controlled out by the run time interval or running frequency for changing compressor
Air temperature；
Two-way Cycle blood pressure lowering off-load pattern：Off-load electromagnetic valve and second throttle are opened, and first throttle valve is closed, and cold-producing medium is along main
While circulation line is circulated, a part of Jing off-loads electromagnetic valve is shunted and is directly entered vapour liquid separator by second throttle；
Circulate in the wind valve opening 50% to 55%, control valve opening 50% to 45% of blowing；Described control device is by adjusting air-supply
The air circulation control leaving air temp in closed circuit and interior circulation loop, produces the middle warm wind that leaving air temp is 45 to 65 DEG C；
Two-way Cycle cooling off-load pattern：Off-load electromagnetic valve and first throttle valve are opened, and second throttle is closed, and cold-producing medium is along main
While circulation line is circulated, a part of Jing off-loads electromagnetic valve shunting simultaneously enters steaming by the first throttle valve in parallel with expansion valve
Send out device；Circulate in the wind valve opening 55% to 65%, control valve opening 45% to 35% of blowing；Described control device is by adjusting
The air circulation control leaving air temp in air-supply closed circuit and interior circulation loop, produces the high temperature that leaving air temp is 65 to 75 DEG C
Hot blast；
Two-way Cycle two-way off-load pattern：Off-load electromagnetic valve and first throttle valve, second throttle are opened, and cold-producing medium is along major cycle
While pipeline is circulated, the shunting of Jing off-loads electromagnetic valve, the cold-producing medium part after shunting is by the first segment in parallel with expansion valve
Stream valve enters vaporizer, and another part is directly entered vapour liquid separator by second throttle；Circulate in the wind valve opening 65% to
75%, control valve opening 35% to 25% of blowing；Described control device is by adjusting air-supply closed circuit and interior circulation loop
Air circulation control leaving air temp, produce leaving air temp higher than 75 DEG C of high-temperature hot-air.
4. a kind of heat pump hot air drying system controlling party of the heat-pump-type Two-way Cycle hot air drying system for described in claim 3
Method, it is characterised in that comprise the following steps：
S100：Configuration temperature control parameter, preserves default temperature control parameter of curve；
S200：Detection and monitoring leaving air temp and drying room humiture；
S300：According to default temperature control curve dynamic adjustment design temperature；
S400：The Two-way Cycle dynamic operational of system is selected according to current design temperature.
5. heat-pump-type Two-way Cycle hot air drying system control method according to claim 5, it is characterised in that also include with
Lower timing control operation step：
S420：If 45 DEG C of design temperature ＜, off-load electromagnetic valve is closed, into single cycle conventional heating pattern；According to leaving air temp
The run time interval of control compressor or running frequency；
S440：If 65 DEG C of design temperature ＜, off-load electromagnetic valve and second throttle are opened, close first throttle valve, follow into double
Ring blood pressure lowering off-load pattern；Leaving air temp is controlled by adjusting the air circulation of air-supply closed circuit and interior circulation loop；
S460：If design temperature >=75 DEG C, S480 is gone to step；Otherwise, off-load electromagnetic valve and second throttle are opened, closes first
Choke valve, into Two-way Cycle cooling off-load pattern；By the air circulation control for adjusting air-supply closed circuit and interior circulation loop
Leaving air temp；
S480：Off-load electromagnetic valve and first throttle valve and second throttle are opened, into Two-way Cycle two-way off-load pattern；By adjusting
The air circulation control leaving air temp in section air-supply closed circuit and interior circulation loop.
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| CN107024033A (en) * | 2017-05-27 | 2017-08-08 | 中原工学院 | A kind of closed type heat pump drying system with dehumidification function |
| CN107036405A (en) * | 2017-05-27 | 2017-08-11 | 中原工学院 | A kind of recovery type heat air-cooled heat pump drying system suitable for the big temperature difference |
| CN109631561A (en) * | 2018-12-20 | 2019-04-16 | 南京智升源建筑环境科技有限公司 | A kind of three-level recuperation of heat closed cycle Analysis of Heat Pump Drying System and technique |
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| CN106989573A (en) * | 2017-05-27 | 2017-07-28 | 中原工学院 | A kind of closed type heat pump drying system with interior radiant heat transfer |
| CN107014173A (en) * | 2017-05-27 | 2017-08-04 | 中原工学院 | A kind of closed type heat pump drying system of direct-expansion type solar energy auxiliary |
| CN107024033A (en) * | 2017-05-27 | 2017-08-08 | 中原工学院 | A kind of closed type heat pump drying system with dehumidification function |
| CN107036405A (en) * | 2017-05-27 | 2017-08-11 | 中原工学院 | A kind of recovery type heat air-cooled heat pump drying system suitable for the big temperature difference |
| CN107024033B (en) * | 2017-05-27 | 2023-02-03 | 中原工学院 | Closed-circuit heat pump drying system with dehumidification function |
| CN109631561A (en) * | 2018-12-20 | 2019-04-16 | 南京智升源建筑环境科技有限公司 | A kind of three-level recuperation of heat closed cycle Analysis of Heat Pump Drying System and technique |
| CN109899944A (en) * | 2019-01-28 | 2019-06-18 | 广州七号家族节能科技有限公司 | A kind of regional dynamics circularly cooling and heating system |
| CN114543234A (en) * | 2022-02-22 | 2022-05-27 | 山西省安装集团股份有限公司 | Energy-concerving and environment-protective idle call heat supply ventilation system |
| CN116847641A (en) * | 2023-08-31 | 2023-10-03 | 空间液态金属科技发展(江苏)有限公司 | Ventilation and heat dissipation system for standard experiment cabinet in space station cabin |
| CN116847641B (en) * | 2023-08-31 | 2023-11-21 | 空间液态金属科技发展(江苏)有限公司 | Ventilation and heat dissipation system for standard experiment cabinet in space station cabin |
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