CN106643107B - A kind of heat-pump-type Two-way Cycle hot air drying system control method and its control device - Google Patents

A kind of heat-pump-type Two-way Cycle hot air drying system control method and its control device Download PDF

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Publication number
CN106643107B
CN106643107B CN201611169010.3A CN201611169010A CN106643107B CN 106643107 B CN106643107 B CN 106643107B CN 201611169010 A CN201611169010 A CN 201611169010A CN 106643107 B CN106643107 B CN 106643107B
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China
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air
control
valve
temperature
heat
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CN201611169010.3A
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Chinese (zh)
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CN106643107A (en
Inventor
王玉军
吴运运
吴小网
季忠海
王颖
王天舒
杨奕
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江苏天舒电器股份有限公司
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure
    • F26B21/002Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/06Heat pumps characterised by the source of low potential heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler
    • F25B41/003Fluid-circulation arrangements, e.g. for transferring liquid from evaporator to boiler fluid line arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08Humidity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10Temperature; Pressure

Abstract

A kind of heat-pump-type Two-way Cycle hot air drying system control method and its control device, it is related to supply or the control device of the air or gas of drying solid material or product, more particularly to a kind of control method and control device of heat-pump-type hot air drying system, include the following steps;Temperature control parameter is configured, default temperature control parameter of curve is saved;Detection and monitoring leaving air temp and drying chamber temperature and humidity;According to default temperature control curve dynamic adjustment set temperature;According to the Two-way Cycle dynamic operational of current set temperature selection system.Control device of the invention realizes process control using microprocessor, and by establishing the interior circulation loop of Wind Volume circulation, the condensation latent heat for fully absorbing refrigerant improves basic wind-warm syndrome, and circulation loop secondary heat exchange of being blown produces high-temperature hot-air;Using two-way air quantity auto-adjustment control air-out volume, guarantee that leaving air temp drying room temperature changes demand;Not only it can guarantee the reliability of product, but also can reach and improve unit efficiency, and reduced the purpose of energy consumption.

Description

A kind of heat-pump-type Two-way Cycle hot air drying system control method and its control device

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 The control method and control device of kind heat-pump-type hot air drying system.

Background technique

Need the place of hot-air seasoning more and more currently on the market, such as tobacco drying, grain heat-drying, medicinal 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 the direction that country promotes, and big, operating cost is high because consuming energy for electric furnace, is also not suitable for carrying out batch popularization.Northern country It is all to carry out heating with coal stove manufacture hot water before heating, country replaces coal stove to popularize in an all-round way in rural area using heat pump, it was demonstrated that Heat pump still has very big market prospects in terms of heating.Heat pump also has very big hair in the place of above-mentioned hot-air seasoning demand Open up potentiality.By taking the baking equipment for preparatory treatment of tobacco in China as an example, traditional civil structure natural ventilation type barn is continued to use for a long time, although often There are certain improvement to be transformed, but still without being detached from traditional form.It introduces from the 1990s with fuel oil, fire coal directly in China The dense drying equipment of heat supply and boiler heat supplying, in various regions, experiment and demonstration has reacted baking operating technology simplicity, has saved recruitment, energy Guarantee the advantages such as baking quality of tobacco, but one-time investment higher cost, fuel consumption is larger, to be widely applied at no distant date very Big difficulty, in practice it has proved that be not suitable for China's national situation, cannot be received by production.Tobacco flue-curing is an a large amount of heat dissipation process, general Logical barn coal direct heating, heat utilization efficiency is low, and coal consumption is high, usually dries 1kg tobacco leaf coal consumption in 1.5~2.5kg and marks coal, Environmental pollution is serious.Chinese invention patent " a kind of using air source heat pump as the tobacco baking room of heat source " (patent of invention number: 200910044468.X, Authorization Notice No.: CN101940358B) disclose it is a kind of roasting using air source heat pump as the tobacco of heat source Room, the hothouse including being equipped with the heating room of fresh wind port and equipped with temperature, moisture probe, barn top is equipped with moisture exhausting port, also wraps Include air source heat pump and condenser fan, the value range of the ratio of condenser heat exchange area and compressor power input is in 7- Between 15m2/kw, condenser and its air draught type breeze fan device are indoor in the heating;The hothouse and/or heating room Equipped with insulating layer.The technical solution makes air source heat pump using air source heat pump and solar energy as the novel heat source of tobacco baking room Obtained great expansion with the application range of solar energy, produce cigarette district promote the use of on a large scale can reduce atmosphere, soil and The sulfur content of tobacco leaf improves quality of tobacco, has positive effect to energy saving, protection environment.But in the Roaster of tobacco In terms of skill, " double low " baking process of five-part form, seven segmentations and six segmentations etc. has been researched and proposed in various regions in succession.Every kind of baking process Tobacco flue-curing overall process is all divided into changing yellow stage, fixation stage, drying muscle stage, having specific temperature and humidity to refer to all is provided to each period Mark, the multisection type stoving process figure of part kind tobacco shown in Figure 9.It is thin since baking process paragraph divides mostly, especially It is to change to divide more than level and obscure, non-quantitative to tobacco leaf, and without simple specific key point, technology is complicated, is not easy to slap It holds, existing heat pump drying system is not able to satisfy the requirement of tobacco roasting similarly.

On the other hand, since certain high temperature drying partial time period needs 80 DEG C or more of hot wind leaving air temp, how to mention It is another problem that heat-pump-type hot air drying system needs to solve for high-temperature hot-air.A kind of Chinese invention patent application " superelevation Warm heat pump drying system " (application number of invention patent: 201510433292.2, publication number: CN105021015A) disclose one kind Superhigh temperature heat pump drying system, including drying chamber, the air -return duct being connected to the air outlet of the drying chamber and return airway, are set to back Circulating fan in air duct, the exhausting duct being connected to air -return duct are set to the exhaust fan of the passway of exhausting duct, are set to return air The air heat recovery device of the intersection in road and exhausting duct, and at least two sets of heat pump units used in parallel;The invention uses Two sets or two sets or more heat pump unit parallel operations, at drying operation process initial stage by the low-grade surrounding air heat pair of absorption Drying chamber carries out heater riser temperature, and heating to a certain extent afterwards dehumidifies to the high temperature and humidity air being discharged in drying chamber, to it Contained in sensible heat and latent heat maximumlly recycled.The system utilizes the cycle fluid temperature range of two sets of heat pump units Difference relatively higher supply air temperature is provided, while guaranteeing that the evaporating temperature of Drying unit sufficiently improves.But the existing skill Art scheme uses two sets of heat pump units, this not only causes drying chamber equipment investment to significantly improve, by cycle fluid temperature range Difference improves the complexity that supply air temperature also adds plant maintenance.Simultaneously as in drying course drying chamber heat consumption demand Variation is very big, this does not only result in the frequent start-stop of heat pump unit, increases the operation power consumption of unit, reduces the efficiency of unit, can also So that the temperature change in drying chamber is become larger, or even the quality of finished product can be influenced due to drying temperature changes excessive.

Summary of the invention

The invention aims to provide a kind of heat-pump-type Two-way Cycle hot air drying system, for solving existing heat pump hot wind When drying system provides high-temperature hot-air.

The technical proposal adopted by the invention to solve the above technical problems is that:

A kind of heat-pump-type Two-way Cycle hot air drying system control method, it is characterised in that the following steps are included:

S100: configuration temperature control parameter saves default temperature control parameter of curve;

S200: detection and monitoring leaving air temp and drying chamber temperature and humidity;

S300: according to default temperature control curve dynamic adjustment set temperature;

S400: according to the Two-way Cycle dynamic operational of current set temperature selection system.

The heat-pump-type Two-way Cycle hot air drying system includes the hot wind that air-supply circulation loop and interior circulation loop are constituted Double circulation loop, the air-supply regulating valve of adjusting hot wind double circulation loop air circulation and interior circulation air-valve;It is connected in series in refrigeration The latent heat condenser and sensible heat condenser of agent major cycle pipeline;It is connected by off-load solenoid valve, first throttle valve with second throttle The two-way off-load branch of composition;

The Two-way Cycle dynamic operational includes single cycle conventional heating mode, Two-way Cycle decompression off-load mode, double Circulation temperature lowering off-load mode and Two-way Cycle two-way off-load mode, in which:

Single cycle conventional heating mode: off-load solenoid valve is closed, and refrigerant is recycled along major cycle pipeline;Interior circulation air-valve is opened Degree 0%, control valve opening 100% of blowing, the Two-way Cycle hot air drying system produce out wind-warm syndrome by circulation loop of blowing Degree is lower than 45 DEG C of low temperature hot wind;The control device is controlled by the runing time interval or running frequency for changing compressor Leaving air temp;

Two-way Cycle is depressured off-load mode: off-load solenoid valve and second throttle are opened, and first throttle valve is closed, and refrigerant exists While along major cycle pipeline circulation, a part, which shunts through off-load solenoid valve and passes through second throttle, is directly entered vapor-liquid separation Device;Interior circulation valve area 50% to 55%, control valve opening 50% to 45% of blowing;The control device is sent by adjusting The air circulation of wind circulation loop and interior circulation loop controls leaving air temp, produces the middle warm that leaving air temp is 45 to 65 DEG C Wind;

Two-way Cycle cooling off-load mode: off-load solenoid valve and first throttle valve are opened, and second throttle is closed, and refrigerant exists Along major cycle pipeline circulation while, a part shunted through off-load solenoid valve and by the first throttle valve in parallel with expansion valve into Enter evaporator;Interior circulation valve area 55% to 65%, control valve opening 45% to 35% of blowing;The control device passes through The air circulation for adjusting air-supply circulation loop and interior circulation loop controls leaving air temp, and producing leaving air temp is in 65 to 75 DEG C High-temperature hot-air;

Two-way Cycle two-way off-load mode: off-load solenoid valve and first throttle valve, second throttle are opened, and refrigerant is along master It while circulation line recycles, is shunted through off-load solenoid valve, refrigerant a part after shunting passes through in parallel with expansion valve the One throttle valve enters evaporator, and another part is directly entered vapour liquid separator by second throttle;Interior circulation valve area 65% to 75%, control valve opening 35% to 25% of blowing;The control device is by adjusting air-supply circulation loop and interior following The air circulation of loop back path controls leaving air temp, produces the high-temperature hot-air that leaving air temp is higher than 75 DEG C.

A kind of preferable technical solution of heat-pump-type Two-way Cycle hot air drying system control method of the invention, feature exist In the step S400 include following control operational motion:

S420: if demand heat consumption < 25%, start frequency-changeable compressor, close the first solenoid valve block and second solenoid valve Group, into frequency conversion constant volume mode;

S440: if demand heat consumption < 35%, start frequency-changeable compressor, close the first solenoid valve block, open the second electromagnetism Valve group, into frequency conversion varying capacity mode;

S460: if demand heat consumption >=70%, goes to step S480;Otherwise, while starting invariable frequency compressor and frequency conversion compression Machine opens the first solenoid valve block, second solenoid valve group is closed, into determining frequency varying capacity+frequency conversion constant volume parallel running mode;

S480: while starting invariable frequency compressor and frequency-changeable compressor, the first solenoid valve block is closed, second solenoid valve is opened Group, into determining frequency constant volume+frequency conversion varying capacity parallel running mode.

Another object of the present invention is to provide for one kind for realizing above-mentioned heat-pump-type Two-way Cycle hot air drying system control The control device of method processed.The technical proposal adopted by the invention to solve the above technical problems is that:

A kind of heat pump hot air drying system control for realizing above-mentioned heat-pump-type Two-way Cycle hot air drying system control method Device processed, it is characterised in that including for configuring temperature control parameter and saving the operating parameter setting of default temperature control parameter of curve Module, drying chamber temperature and humidity monitor module and supply air temperature for detecting and monitoring leaving air temp and drying chamber temperature and humidity monitor mould Block, for driving the valve area controller of air-valve, and the heat pump unit controller for controlling compressor and solenoid valve;Institute The input terminal for stating drying chamber temperature and humidity monitor module is connected to operating parameter setting module, dry-bulb temperature sensor and wet-bulb temperature Sensor;The output end of the drying chamber temperature and humidity monitor module is connected to heat pump unit controller;Heat pump unit controller it is defeated Outlet is connected to the control solenoid valve in compressor and refrigerant line;The input terminal of the supply air temperature monitoring module, connection To operating parameter setting module and leaving air temp sensor;The output end of the supply air temperature monitoring module is connected to valve area Controller, the output end of valve area controller are connected to interior circulation air-valve and air-supply regulating valve.

A kind of preferable technical solution of heat pump hot air drying system control device of the invention, it is characterised in that described Control device uses the chip microprocessor with multi-channel A/D translation interface and multi-channel PWM output interface to realize process control, institute Operating parameter setting module, drying chamber temperature and humidity monitor module and the supply air temperature monitoring module stated are the software that microprocessor provides Functional module;The A/D that dry-bulb temperature sensor, leaving air temp sensor and the wet bulb temperature sensor passes through microprocessor Translation interface is connected to chip microprocessor;The control device is exported using the PWM of microprocessor, is controlled for valve area Device provides valve area and controls output signal, and provides the change of frequency-changeable compressor and frequency conversion fan by heat pump unit controller Frequency control output signal;The control device utilizes the PIO program to ports output solenoid valve of microprocessor and opening for compressor Output signal is closed, by heat pump unit controller to the compressor and solenoid valve execution switch control in system.

The beneficial effects of the present invention are:

1, heat-pump-type Two-way Cycle hot air drying system control method of the invention and its control device utilize microprocessor reality Existing process control, by establishing the interior circulation loop of Wind Volume circulation, the condensation latent heat for fully absorbing refrigerant improves basic wind Temperature, circulation loop secondary heat exchange of being blown produce high-temperature hot-air;Using two-way air quantity auto-adjustment control air-out volume, guarantee Air temperature drying room temperature changes demand;Not only it can guarantee the reliability of product, but also can reach and improve unit efficiency, and reduced energy consumption Purpose.

2, heat-pump-type Two-way Cycle hot air drying system control method of the invention and its control device, using multi-segment type temperature control Curved configuration drying room temperature control parameter, according to temperature control curve dynamic adjustment set temperature, and according to current adjustment set temperature The operational mode of selection system, control Two-way Cycle hot air drying system realize fully-automatic intelligent operation, are not necessarily to manual control;It can be with Meet the high-precision control requirement of temperature in baking process, humidity.

Detailed description of the invention

Fig. 1 is the double circulation structure schematic diagram of heat-pump-type Two-way Cycle hot air drying system;

Fig. 2 is the heat pump unit schematic diagram of heat-pump-type Two-way Cycle hot air drying system;

Fig. 3 is that heat pump hot air drying system determines frequency frequency conversion double circulation structure schematic diagram;

Fig. 4 is the heat pump unit schematic diagram of frequency conversion capability-variable heat pump hot air drying system;

Fig. 5 is the control device schematic diagram of frequency conversion capability-variable 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 tobacco flue-cured tobacco;

Figure 10 is each period heat consumption curve graph during flue-cured tobacco.

The appended drawing reference of each component in the 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 third 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 sensing package, and 3-2 is the second expansion valve, 3- 2A is the second balance pipe, and 3-2B is the second temperature sensing package, and 4 be evaporator, and 4-1 is the first evaporator, and 4-2 is the second evaporator, 4-3 It is vapour liquid separator for third evaporator, 5,5-1 is the first gas-liquid separator, and 5-2 is the second gas-liquid separator, and 6 be evaporator Blower, 7-1 are the first solenoid valve block, and 7-2 is second solenoid valve group, and 8 be pressure fan, and 10 be first throttle valve, and 11 be the second section Valve is flowed, 12 be off-load solenoid valve, and 23 be interior circulation air-valve, and 24 be air-supply regulating valve, and 100 be heat pump unit, and 200 be air-heater Cabinet, 210 be supply air duct, and 220 be interior circulation air path, and 230 be return airway, and 400 be drying chamber, and 500 be control device, and 510 are Operating parameter setting module, 520 be drying chamber temperature and humidity monitor module, and 521 be dry-bulb temperature sensor, and 522 pass for wet-bulb temperature Sensor, 530 be supply air temperature monitoring module, and 531 be leaving air temp sensor, and 540 be valve area controller, and 550 be heat pump Generator set controller.

Specific embodiment

For better understanding of above-mentioned technical proposal of the invention, carry out with reference to the accompanying drawings and examples further Detailed description.Fig. 1 is one embodiment of heat-pump-type Two-way Cycle hot air drying system of the invention, including heat pump unit 100, heat Fan cabinet 200 and drying chamber 400, and the control device 500 for realizing the control of hot air drying system microprocessor;Such as Fig. 1 institute Show, the heat-pump-type Two-way Cycle hot air drying system further includes blowing that hot wind that circulation loop and interior circulation loop are constituted is double to follow Loop back path;

The air-supply regulating valve 24 being arranged inside the hot wind cabinet 200, hot wind cabinet 200 is separated for basic wind-warm syndrome area and Reheating heating zone;

It is placed in the latent heat condenser 21 in basic wind-warm syndrome area and is placed in the sensible heat condenser 22 of reheating heating zone, pass through heat pump machine The refrigerant line of group 100, which is connected in series, constitutes double series condenser;The high temperature liquid refrigerant of compressor discharge, is first sent into Latent heat condenser 21 is re-fed into after the heat exchange cooling of sensible heat condenser 22;

The air-supply circulation loop enters hot wind cabinet 200 through return airway 230 from drying chamber 400, by being placed in basis The latent heat condenser 21 of wind-warm syndrome area inlet side enters pressure fan 8, and the sensible heat of reheating heating zone is then reached through air-supply regulating valve 24 Condenser 22 is sent into drying chamber 400 finally by supply air duct 210;

The interior circulation loop enters interior circulation air path 220 through interior circulation air-valve 23 from 8 exhaust outlet of pressure fan, then passes through Return airway 230 enters hot wind cabinet 200, reaches the latent heat condenser 21 of basic wind-warm syndrome area inlet side, eventually passes back to pressure fan 8 Air entry;Enter the air-flow in basic wind-warm syndrome area from drying chamber 400, a part is transmitted back to return airway by interior circulation air path 220 230, it is sent to latent heat condenser 21 after mixing with drying chamber return air, forms the interior circulation loop of Wind Volume circulation, another part is through sending Wind regulating valve 24 is sent to sensible heat condenser 22 and carries out secondary heat exchange, and is sent into drying chamber 400 by supply air duct 210, forms small wind Measure the air-supply circulation loop of circulation.Latent heat in refrigerant is gradually transferred to the big of interior circulation loop by latent heat condenser 21 In air quantity circulating current, the condensation latent heat by fully absorbing refrigerant improves basic wind-warm syndrome;Compressor discharge temperature is up to 130 DEG C gaseous refrigerant in sensible heat, through 22 secondary heat exchange of sensible heat condenser be transferred to air-supply circulation loop small air quantity circulating air In stream;Sensible heat condenser 22 can absorb 30% or so system thermal energy, and the leaving air temp of hot wind cabinet 200 can be made to reach 90 ℃。

The control device 500 is adjusted air-supply and is followed by the aperture of circulation air-valve 23 in control and regulating valve 24 of blowing The air circulation of loop back path and interior circulation loop controls the leaving air temp of hot wind cabinet 200.

The embodiment of the heat pump unit of heat-pump-type Two-way Cycle hot air drying system of the invention according to Fig.2, it is described Heat pump unit 100 including refrigerant major cycle pipeline and be connected to the two-way off-load branch of major cycle pipeline;The master Circulation line passes sequentially through sensible heat condenser 22, latent heat condenser 21, expansion valve 3, evaporation since the exhaust outlet of compressor 1 Device 4 and vapour liquid separator 5, return to the air entry of compressor 1;The two-way off-load branch routes off-load solenoid valve 12, first segment Flow valve 10 and the connection composition of second throttle 11: the entrance of the off-load solenoid valve 12 is parallel-connected to the system of latent heat condenser 21 The entrance of refrigerant circuit outlet, the first throttle valve 10 and second throttle 11 is parallel-connected to going out for off-load solenoid valve 12 Mouthful, the outlet of the first throttle valve 10 is connected to the entrance of evaporator 4, and the outlet of the second throttle 11 is connected to vapour-liquid The entrance of separator 5;The control device 500 is connected to first throttle valve 10, second throttle 11 and off-load solenoid valve 12, The refrigerant circulation line for changing heat pump unit according to leaving air temp dynamic, the row of compressor 1 is reduced by two-way off-load branch Temperature degree and high side pressure realize the Two-way Cycle dynamic operational of hot air drying system.

One embodiment of heat-pump-type Two-way Cycle hot air drying system according to the present invention, the Two-way Cycle dynamic operation Mode includes single cycle conventional heating mode, Two-way Cycle decompression off-load mode, Two-way Cycle cooling off-load mode and Two-way Cycle two-way Off-load mode, in which:

Single cycle conventional heating mode: off-load solenoid valve 12 is closed, and refrigerant is recycled along major cycle pipeline;Interior circulation air-valve 23 apertures 0%, 24 aperture 100% of regulating valve of blowing, the Two-way Cycle hot air drying system are produced by circulation loop of blowing Leaving air temp is lower than 45 DEG C of low temperature hot wind;Runing time interval or fortune of the control device 500 by change compressor 1 Line frequency controls leaving air temp;

Two-way Cycle is depressured off-load mode: off-load solenoid valve 12 and second throttle 11 are opened, and first throttle valve 10 is closed, system Cryogen along major cycle pipeline circulation while, a part through off-load solenoid valve 12 shunt and by second throttle 11 directly into Enter vapour liquid separator 5, to reduce high side pressure;Interior 23 aperture 50% to 55% of circulation air-valve, 24 aperture of regulating valve of blowing 50% to 45%;The control device 500 is controlled out by adjusting the air circulation of air-supply circulation loop and interior circulation loop Air temperature produces the medium temperature hot wind that leaving air temp is 45 to 65 DEG C;

Two-way Cycle cooling off-load mode: off-load solenoid valve 12 and first throttle valve 10 are opened, and second throttle 11 is closed, system While along major cycle pipeline circulation, a part shunts through off-load solenoid valve 12 and by parallel with expansion valve 3 the cryogen One throttle valve 10 enters evaporator 4, to reduce delivery temperature;Interior 23 aperture 55% to 65% of circulation air-valve, regulating valve 24 of blowing Aperture 45% to 35%;The air circulation control that the control device 500 passes through adjusting air-supply circulation loop and interior circulation loop Air temperature is produced, the high temperature hot wind that leaving air temp is 65 to 75 DEG C is produced;

Two-way Cycle two-way off-load mode: off-load solenoid valve 12 and first throttle valve 10, second throttle 11 are opened, refrigerant While along major cycle pipeline circulation, shunted through off-load solenoid valve 12, refrigerant a part after shunting by with expansion valve 3 First throttle valve 10 in parallel enters evaporator 4, and another part is directly entered vapour liquid separator 5 by second throttle 11;It is interior 23 aperture 65% to 75% of air-valve is recycled, 24 aperture 35% to 25% of regulating valve of blowing;The control device 500 passes through adjusting The air circulation of air-supply circulation loop and interior circulation loop controls leaving air temp, 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 chamber in drying course, cause what the frequent start-stop of unit and efficiency reduced to ask Topic, in one embodiment of heat pump hot air drying system of the invention, the heat pump unit 100 further includes using frequency conversion pressure The second refrigerant circulation line of contracting machine;The third condenser 2-3 being connected in second refrigerant circulation line is arranged in hot wind In cabinet 200, it is placed in the air side in the basic wind-warm syndrome area, referring to Fig. 3;As the demand heat consumption < 40% of drying chamber, fixed frequency Compressor stops, and frequency-changeable compressor starting, heat pump hot air drying system is with the operation of conventional inverter heat pump mode;When the demand of drying chamber When heat consumption >=40%, invariable frequency compressor and frequency-changeable compressor start simultaneously, and heat pump hot air drying system is to determine frequency+frequency conversion two-shipper Paralleling model operation;When the set 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 latent heat condenser 21, third condenser 2-3 and sensible heat condenser 22 form the three-level heat exchange of hot wind cabinet 200 Structure;The circulating current of interior circulation loop is exchanged heat twice by latent heat condenser 21 and third condenser 2-3, further increases base The basic wind-warm syndrome in plinth wind-warm syndrome area, makes the leaving air temp of hot wind cabinet 200 be increased to 75 DEG C or more.

One embodiment of the heat pump unit of frequency conversion capability-variable heat pump hot air drying system of the invention is as shown in figure 4, institute The heat pump unit 100 stated 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 by the first solenoid valve block 7-1 and second solenoid valve group 7-2 control connection;

Described determines frequency circulation line since the exhaust outlet of invariable frequency compressor 1-1, pass sequentially through the first condenser 2-1, First expansion valve 3-1, the first evaporator 4-1 and the first gas-liquid separator 5-1, return to the air entry of invariable frequency compressor 1-1;

The frequency conversion circulation line since the exhaust outlet of frequency-changeable compressor 1-2, pass sequentially through third condenser 2-3, Second expansion valve 3-2, third evaporator 4-3 and the second gas-liquid separator 5-2, return to the air entry of frequency-changeable compressor 1-2;

The heat exchanger transfiguration branch includes the second condenser 2-2 and the second evaporator 4-2, second condenser 2-2 is parallel-connected to the first condenser 2-1 by the first solenoid valve block 7-1, is parallel-connected to by second solenoid valve group 7-2 Three condenser 2-3;The second evaporator 4-2 is parallel-connected to the first evaporator 4-1 by the first solenoid valve block 7-1, leads to It crosses second solenoid valve group 7-2 and is parallel-connected to third evaporator 4-3;

The control device 500 is connected to the first solenoid valve block 7-1 and second solenoid valve group 7-2, passes through control first The opening state of solenoid valve block 7-1 and second solenoid valve group 7-2 change the connection type of heat exchanger transfiguration branch, control heat pump Hot air drying system enters two-shipper transfiguration operational mode;The control device 500 controls frequency conversion pressure according to outlet air set temperature The running frequency of contracting machine 1-2;Frequency conversion capability-variable heat pump hot air drying system of the invention is changed by the expansion of varying capacity operational mode The heat exchange area of hot device (including evaporator and condenser) can significantly improve the overall heat exchange effect of heat pump unit 100, improve System energy efficiency.

One embodiment of frequency conversion capability-variable heat pump hot air drying system according to the present invention, the two-shipper transfiguration operation Mode includes frequency conversion constant volume mode, and frequency conversion varying capacity mode determines frequency varying capacity+frequency conversion constant volume parallel running mode, frequency conversion Constant volume mode+frequency conversion varying capacity parallel running mode, and determine frequency constant volume+frequency conversion varying capacity parallel running mode, in which:

Frequency conversion constant volume mode: frequency-changeable compressor 1-2 starting, refrigerant are recycled along frequency conversion circulation line, the first solenoid valve Group 7-1 and second solenoid valve group 7-2 is turned off;

Frequency conversion varying capacity mode: frequency-changeable compressor 1-2 starting, refrigerant are recycled along frequency conversion circulation line;First solenoid valve Group 7-1 is closed, and second solenoid valve group 7-2 is opened, and the 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 while opening Dynamic, refrigerant is simultaneously along determining frequency circulation line and frequency conversion circulation line two-way circulation;First solenoid valve block 7-1 is opened, the second electricity Magnet valve group 7-2 is closed, and the heat exchanger transfiguration branch circuit parallel connection, which is connected to, determines frequency circulation line, and invariable frequency compressor 1-1 enters change 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 while opening Dynamic, refrigerant is simultaneously along determining frequency circulation line and frequency conversion circulation line two-way circulation;First solenoid valve block 7-1 is closed, the second electricity Magnet valve group 7-2 is opened, and the heat exchanger transfiguration branch circuit parallel connection is connected to frequency conversion circulation line, and frequency-changeable compressor 1-2 enters change Capacity operational mode.

It is preferred for needing the embodiment of the heat pump hot air drying system of higher drying temperature, the air-heater according to one Cabinet 200 includes the basic wind-warm syndrome area being separated to form by air-supply regulating valve 24 and reheating heating zone;The first condenser 2-1 and The refrigerant line of second condenser 2-2, which is connected in series, constitutes 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 wind-warm syndrome area, third condenser as latent heat condenser 2-3 is placed in the air side in basic wind-warm syndrome area;The setting of hot wind cabinet 200 is connected to the interior circulation loop in basic wind-warm syndrome area, ginseng See Fig. 3;The hot wind of heat pump hot air drying system output makes heat by the secondary heat exchange of interior circulation loop and air-supply circulation loop The leaving air temp of fan cabinet 200 can reach 90 DEG C.

One embodiment of the control device 500 of frequency conversion capability-variable heat pump hot air drying system of the invention as shown in figure 5, Including the operating parameter setting module 510 for configuring temperature control parameter and the default temperature control parameter of curve of preservation, for detecting With monitoring leaving air temp and drying chamber temperature and humidity drying chamber temperature and humidity monitor module 520 and supply air temperature monitoring module 530, for driving The valve area controller 540 of dynamic air-valve, and the heat pump unit controller 550 for controlling compressor and solenoid valve;It is described The input terminal of drying chamber temperature and humidity monitor module 520 is connected to operating parameter setting module 510, dry-bulb temperature sensor 521 and wet Ball temperature sensor 522;The output end of the drying chamber temperature and humidity monitor module 520 is connected to heat pump unit controller 550;Heat pump The output end of generator set controller 550 is connected to the control solenoid valve in compressor and refrigerant line;The supply air temperature monitoring The input terminal of module 530 is connected to operating parameter setting module 510 and leaving air temp sensor 531;The supply air temperature monitoring The output end of module 530 is connected to valve area controller 540, and the output end of valve area controller 540 is connected to interior circulation Air-valve 23 and air-supply regulating valve 24.The control solenoid valve includes off-load solenoid valve 12, first throttle valve 10, second throttle 11, the first solenoid valve block 7-1 and second solenoid valve group 7-2.

One embodiment of frequency conversion capability-variable heat pump hot air drying system according to the present invention, the control device 500 Process control, the operation are realized using the chip microprocessor with multi-channel A/D translation interface and multi-channel PWM output interface Parameter setting module 510, drying chamber temperature and humidity monitor module 520 and supply air temperature monitoring module 530 are the soft of microprocessor offer Part functional module;Dry-bulb temperature sensor 521, leaving air temp sensor 531 and the wet bulb temperature sensor 522 passes through micro- The A/D translation interface of processor is connected to chip microprocessor;The control device 500 is exported using the PWM of microprocessor, Valve area is provided for valve area controller 540 and controls output signal, and provides frequency conversion by heat pump unit controller 550 The frequency control output signal of compressor and frequency conversion fan;The control device 500 utilizes the PIO program to ports of microprocessor The switch output signal for exporting compressor and solenoid valve, by heat pump unit controller 550 to the compressor and electromagnetism in system Valve executes switch control.

Fig. 6 is one embodiment of heat-pump-type Two-way Cycle hot air drying system control method of the invention, including following step It is rapid:

S100: configuration temperature control parameter saves default temperature control parameter of curve;

S200: detection and monitoring leaving air temp and drying chamber temperature and humidity;

S300: according to default temperature control curve dynamic adjustment set temperature;

S400: the Two-way Cycle dynamic operational for selecting system current according to set 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 set temperature of each period and steady Warm time, control Two-way Cycle hot air drying system realize automatic intelligent operation, are not necessarily to manual control.

The embodiment of heat-pump-type Two-way Cycle hot air drying system control method of the invention according to figure 6, it is described Step S400 includes following control operational motion:

S420: if 45 DEG C of set temperature <, off-load solenoid valve 12 is closed, into single cycle conventional heating mode;This mode The aperture of circulation air-valve 23 is 0% in lower, and the aperture of air-supply regulating valve 24 is 100%;Compressor 1 is controlled according to leaving air temp Runing time interval or running frequency;The temperature control range of this step corresponds to the 1st to 5 of 10 segmentation heating curves shown in Fig. 8 Section, setting leaving air temp is respectively 20 DEG C, 25 DEG C, 30 DEG C, 35 DEG C and 40 DEG C.

S440: if set temperature is 65 DEG C of <, off-load solenoid valve 12 and second throttle 11 are opened, closes first throttle valve 10, off-load mode is depressured into Two-way Cycle;Air circulation by adjusting air-supply circulation loop and interior circulation loop controls outlet air Temperature;The aperture of interior circulation air-valve 23 is 40~60% under this mode, and the aperture of air-supply regulating valve 24 is 60~40%;This step Temperature control range correspond to the 6th section and the 7th section of 10 segmentation heating curves shown in Fig. 8, setting leaving air temp is respectively 50 DEG C With 60 DEG C, the aperture of corresponding interior circulation air-valve 23 is respectively 50% and 55%, and the aperture of air-supply regulating valve 24 is respectively 50% With 45%.

S460: if set temperature >=75 DEG C, S480 is gone to step;Otherwise, off-load solenoid valve 12 and second throttle 11 are opened, First throttle valve 10 is closed, into Two-way Cycle cooling off-load mode;It is followed by adjusting air-supply circulation loop and interior circulation loop Ring Boiler pressure control leaving air temp;The aperture of interior circulation air-valve 23 is 55~65% under this mode, and the aperture of air-supply regulating valve 24 is 45~35%;The temperature control range of this step corresponds to the 8th section of 10 segmentation heating curves shown in Fig. 8, set leaving air temp as 70 DEG C, corresponding interior circulation air-valve 23 and the aperture for regulating valve 24 of blowing are respectively 60% and 40%.

S480: off-load solenoid valve 12 and first throttle valve 10 and second throttle 11 are opened, into Two-way Cycle two-way off-load Mode;Air circulation by adjusting air-supply circulation loop and interior circulation loop controls leaving air temp;Interior circulated air under this mode The aperture of valve 23 is 60~80%, and the aperture of air-supply regulating valve 24 is 40~20%.The temperature control range of this step corresponds to Fig. 8 institute The 9th section of the 10 segmentation heating curves shown and the 10th section, setting leaving air temp is respectively 80 DEG C and 90 DEG C, corresponding interior circulated air The aperture of valve 23 is respectively 65% and 75%, and the aperture of air-supply regulating valve 24 is respectively 35% and 25%.

Embodiment 2:

The size of certain tobacco drying chamber are as follows: 8 × 2.8 × 2.2m, first drying tobacco leaf amount are 350 bars, and every bar 30kg tobacco leaf closes Count 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 parallel connection is constituted, and the frequency conversion varying capacity connection structure of maximum heating capacity 50kW, 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.The control device 500 is logical It crosses comparative analysis and selects suitable operational mode, to reach maximum operational efficiency.

The embodiment of frequency conversion capability-variable heat pump hot air drying system control method of the invention according to figure 7, it is described Step S300 according to the demand heat consumption of default temperature control curve dynamic setting present period;In the present embodiment.Demand heat dissipation Amount is indicated with the heat consumption of present period drying chamber unit time and the percentage of heat pump unit maximum heating capacity;

The step S400 selects the two-shipper transfiguration operational mode of system according to the demand heat consumption of present period, including Operational motion is controlled below:

S420: if demand heat consumption < 25%, starting frequency-changeable compressor 1-2, closes the electricity of the first solenoid valve block 7-1 and second Magnet valve group 7-2, into frequency conversion constant volume mode;The temperature control range of this step corresponds to the tobacco shown in Fig. 9 drying-fixed yellow phase First half stage, 0~10h of baking time in Figure 10, the heat consumption of drying chamber are 10kw;Frequency-changeable compressor 1-2 is with 20Hz frequency fortune Row.

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 block 7-2, into frequency conversion varying capacity mode;The temperature control range of this step corresponds to tobacco shown in Fig. 9 drying-fixed Huang The rear half stage of phase, 10~60h of baking time in Figure 10, the heat consumption of drying chamber are 15kw;Frequency-changeable compressor 1-2 is with 30Hz frequency Rate operation.First stage (fixed Huang phase) is dried in tobacco, it is desirable that the temperature in drying chamber is maintained between 35~38 DEG C, at this time negative Lotus is relatively small, can preferably meet the needs of tobacco leaf determines the yellow phase by the mode.

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 second solenoid valve group 7-2, and into determining, frequency varying capacity+frequency conversion constant volume is in parallel Operational mode;The temperature control range of this step corresponds to tobacco drying-fixation stage shown in Fig. 9, and the baking time 60 in Figure 10~ 80h, the heat consumption of drying chamber are 15~35kw, and the condenser and evaporator capacity of invariable frequency compressor 1-1 increases, and obtain maximum heating Amount;Frequency-changeable compressor 1-2 is with the operation of 30~50Hz frequency.

S480: while starting invariable frequency compressor 1-1 and frequency-changeable compressor 1-2, closes the first solenoid valve block 7-1, opens the Two solenoid valve block 7-2, into determining frequency constant volume+frequency conversion varying capacity parallel running mode.The temperature control range of this step corresponds to Fig. 9 Shown in tobacco drying-fixation stage and drying muscle stage the first half stage, 80~120h of baking time in Figure 10, the heat consumption of drying chamber 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;Blade is required to contain through overbaking Water is 5%~6%, vein water content 7%~8%;Frequency-changeable compressor 1-2 is with the operation of 50~100Hz frequency, maximum load amount Operating condition under can satisfy tobacco drying heat demand.At this point, invariable frequency compressor 1-1 is no different with common operation conditions, mainly Play the effect for increasing 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 operational energy efficiency is enable to greatly improve.

Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate it is of the invention Technical solution, and being not used as limitation of the invention, it is any based on connotation of the invention to embodiment described above Made variation, modification will all be fallen in scope of protection of the claims of the invention.

Claims (4)

1. a kind of heat-pump-type Two-way Cycle hot air drying system control method, it is characterised in that the following steps are included:
S100: configuration temperature control parameter saves default temperature control parameter of curve;
S200: detection and monitoring leaving air temp and drying chamber temperature and humidity;
S300: according to default temperature control curve dynamic adjustment set temperature;
S400: according to the Two-way Cycle dynamic operational of current set temperature selection system;
The heat-pump-type Two-way Cycle hot air drying system includes blowing that hot wind that circulation loop and interior circulation loop are constituted is double to follow Loop back path, the air-supply regulating valve of adjusting hot wind double circulation loop air circulation and interior circulation air-valve;It is connected in series in refrigerant master The latent heat condenser and sensible heat condenser of circulation line;It is connected and is formed with second throttle by off-load solenoid valve, first throttle valve Two-way off-load branch;
The Two-way Cycle dynamic operational includes single cycle conventional heating mode, Two-way Cycle decompression off-load mode, Two-way Cycle The off-load mode that cools down and Two-way Cycle two-way off-load mode, in which:
Single cycle conventional heating mode: off-load solenoid valve is closed, and refrigerant is recycled along major cycle pipeline;Interior circulation valve area 0%, control valve opening 100% of blowing, the Two-way Cycle hot air drying system produces leaving air temp by circulation loop of blowing Low temperature hot wind lower than 45 DEG C;The control device is controlled out by the runing time interval or running frequency for changing compressor Air temperature;
Two-way Cycle is depressured off-load mode: off-load solenoid valve and second throttle are opened, and first throttle valve is closed, and refrigerant is along master While circulation line recycles, a part, which shunts through off-load solenoid valve and passes through second throttle, is directly entered vapour liquid separator; Interior circulation valve area 50% to 55%, control valve opening 50% to 45% of blowing;The control device is by adjusting air-supply The air circulation of circulation loop and interior circulation loop controls leaving air temp, produces the medium temperature hot wind that leaving air temp is 45 to 65 DEG C;
Two-way Cycle cooling off-load mode: off-load solenoid valve and first throttle valve are opened, and second throttle is closed, and refrigerant is along master While circulation line recycles, a part shunts through off-load solenoid valve and enters steaming by the first throttle valve in parallel with expansion valve Send out device;Interior circulation valve area 55% to 65%, control valve opening 45% to 35% of blowing;The control device passes through adjusting The air circulation of air-supply circulation loop and interior circulation loop controls leaving air temp, produces the high temperature that leaving air temp is 65 to 75 DEG C Hot wind;
Two-way Cycle two-way off-load mode: off-load solenoid valve and first throttle valve, second throttle are opened, and refrigerant is along major cycle While pipeline recycles, shunted through off-load solenoid valve, refrigerant a part after shunting passes through the first segment in parallel with expansion valve Stream valve enters evaporator, and another part is directly entered vapour liquid separator by second throttle;Interior circulation valve area 65% to 75%, control valve opening 35% to 25% of blowing;The control device is by adjusting air-supply circulation loop and interior circulation loop Air circulation control leaving air temp, produce leaving air temp and be higher than 75 DEG C of high-temperature hot-air.
2. heat-pump-type Two-way Cycle hot air drying system control method according to claim 1, it is characterised in that the step Rapid S400 includes following control operational motion:
S420: if 45 DEG C of set temperature <, off-load solenoid valve 12 is closed, into single cycle conventional heating mode;In under this mode The aperture for recycling air-valve 23 is 0%, and the aperture of air-supply regulating valve 24 is 100%;The operation of compressor 1 is controlled according to leaving air temp Time interval or running frequency;
S440: if set temperature is 65 DEG C of <, opening off-load solenoid valve 12 and second throttle 11, close first throttle valve 10, Off-load mode is depressured into Two-way Cycle;Air circulation by adjusting air-supply circulation loop and interior circulation loop controls out wind-warm syndrome Degree;The aperture of interior circulation air-valve 23 is 40~60% under this mode, and the aperture of air-supply regulating valve 24 is 60~40%;
S460: if set temperature >=75 DEG C, S480 is gone to step;Otherwise, off-load solenoid valve 12 and second throttle 11 are opened, is closed First throttle valve 10, into Two-way Cycle cooling off-load mode;By the circulated air for adjusting air-supply circulation loop and interior circulation loop Amount control leaving air temp;Under this mode it is interior circulation air-valve 23 aperture be 55~65%, air-supply regulating valve 24 aperture be 45~ 35%;
S480: off-load solenoid valve 12 and first throttle valve 10 and second throttle 11 are opened, into Two-way Cycle two-way off-load mode; Air circulation by adjusting air-supply circulation loop and interior circulation loop controls leaving air temp;Interior circulation air-valve 23 under this mode Aperture is 60~80%, and the aperture of air-supply regulating valve 24 is 40~20%.
3. a kind of Heat Pump for realizing heat-pump-type Two-way Cycle hot air drying system control method of any of claims 1 or 2 Wind drying system control device, it is characterised in that including for configuring temperature control parameter and saving default temperature control parameter of curve Operating parameter setting module, for detecting and monitoring the drying chamber temperature and humidity monitor module and air-supply of leaving air temp and drying chamber temperature and humidity Temperature monitoring module, for driving the valve area controller of air-valve, and the heat pump machine for controlling compressor and solenoid valve Group controller;The input terminal of the drying chamber temperature and humidity monitor module, is connected to operating parameter setting module, dry-bulb temperature sensor And wet bulb temperature sensor;The output end of the drying chamber temperature and humidity monitor module is connected to heat pump unit controller;Heat pump unit The output end of controller is connected to the control solenoid valve in compressor and refrigerant line;The supply air temperature monitoring module it is defeated Enter end, is connected to operating parameter setting module and leaving air temp sensor;The output end of the supply air temperature monitoring module connects To valve area controller, the output end of valve area controller is connected to interior circulation air-valve and air-supply regulating valve.
4. heat pump hot air drying system control device according to claim 3, it is characterised in that the control device is adopted Process control, the operation ginseng are realized with the chip microprocessor with multi-channel A/D translation interface and multi-channel PWM output interface Number setting module, drying chamber temperature and humidity monitor module and supply air temperature monitoring module are the software function modules that microprocessor provides; Dry-bulb temperature sensor, leaving air temp sensor and the wet bulb temperature sensor passes through the A/D translation interface of microprocessor It is connected to chip microprocessor;The control device is exported using the PWM of microprocessor, provides wind for valve area controller Valve opening controls output signal, and defeated by the frequency control that heat pump unit controller provides frequency-changeable compressor and frequency conversion fan Signal out;The control device exports letter using the PIO program to ports output solenoid valve of microprocessor and the switch of compressor Number, by heat pump unit controller to the compressor and solenoid valve execution switch control in system.
CN201611169010.3A 2016-12-16 2016-12-16 A kind of heat-pump-type Two-way Cycle hot air drying system control method and its control device CN106643107B (en)

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WO2018107750A1 (en) * 2016-12-16 2018-06-21 江苏天舒电器股份有限公司 Control method and control device for variable-frequency and variable-capacity heat pump hot-air drying system
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