CN108534477A - A kind of drying system - Google Patents

A kind of drying system Download PDF

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Publication number
CN108534477A
CN108534477A CN201810354165.7A CN201810354165A CN108534477A CN 108534477 A CN108534477 A CN 108534477A CN 201810354165 A CN201810354165 A CN 201810354165A CN 108534477 A CN108534477 A CN 108534477A
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CN
China
Prior art keywords
air
drying
valve
cold
return air
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Granted
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CN201810354165.7A
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Chinese (zh)
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CN108534477B (en
Inventor
向立平
王汉青
黄坤荣
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University of South China
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University of South China
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Publication of CN108534477A publication Critical patent/CN108534477A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • 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
    • 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
    • F26B21/02Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00Heating arrangements

Abstract

The invention discloses a kind of drying systems, including heat pump unit and hothouse, it is provided with the cool air hose imported for cold wind in the heat pump unit and is used for ajutage derived from hot wind, it is abound with air outlet on the side wall of the hothouse side, it is abound with air outlet on another opposite side side wall of hothouse, the ajutage is conducted with the air outlet, the first exhaust duct and the second exhaust duct are communicated on the air outlet, first exhaust duct is conducted with outside, and second exhaust duct is conducted with the heat pump unit.For the drying system by its structure design, can realize different zones material in hothouse easily synchronizes drying, greatly optimizes the dry mass of material, reduces energy consumption and the time of system operation.

Description

A kind of drying system
Technical field
The present invention relates to drying device fields, more specifically, more particularly to a kind of drying system.
Background technology
The dry various operations for referring to removing moisture or other hygroscopic waters from wet stock.Such as:It will be moist in daily life Material is placed under sunlight exposure to remove moisture;Industrially air, industrial gasses are removed with silica gel, lime, concentrated sulfuric acid etc. or have Moisture in machine liquid;Mass and heat transfer is relied in Chemical Manufacture, and wet solid object is heated with hot-air, flue gas and infrared ray etc. Material, makes moisture contained therein or solvent evaporation and removes.Dry purpose be make material convenient for storage, transport and use, or Meet the needs of further processing.Such as grain, vegetables can store for a long time after drying;Plastics can be prevented after synthetic resin drying Occurs bubble or moire in product;Paper is easy to use and stores after drying.Since the product after drying has many benefits, Therefore drying is widely used in each department such as chemical industry, food, light industry, weaving, coal, agriculture and forestry product processing and building materials, various dry Dry device is also to come into being.
Presently, heat pump drying equipment is a kind of existing frequently-used drying device.In specific implementation process, heat pump drying Equipment utilization heat pump manufactures heat, then carries out circulating-heating, then the heat sky by being formed after heating to air using the heat It is vapor that forwarding, which is precipitated, in moisture content baking in material to be dried in hothouse by wind, and then vapor is mixed into wet sky with air Gas is discharged together, to realize the removal moisture drying of material.In actual mechanical process, due to existing heat pump drying equipment structure design Limitation, air circulation passes in and out the import of hothouse and outlet is usually single square opening or round mouth, and heated dry air enters dry Dry interior is spread again, and cold humid air is then exhausted from after hothouse contract, in this way, leading to the resistance of air disengaging hothouse very Greatly, cause dry indoor air velocity and air quantity uneven, especially four angles of hothouse are often the dead angle of ventilation, lead to drying The dry materials progress of indoor different zones is inconsistent, significantly impacts the dry mass of material, increases the energy consumption of system operation With the time.
Invention content
The technical problem to be solved in the present invention is to provide a kind of drying system, which passes through its structure design, energy It is enough realize different zones material in hothouse easily synchronize drying, greatly optimize the dry mass of material, reduce system operation Energy consumption and the time.
A kind of drying system, including heat pump unit and hothouse are provided in the heat pump unit and to be imported for cold wind Cool air hose has been abound with air outlet, the hothouse is another with for ajutage derived from hot wind on the side wall of the hothouse side Air outlet is abound on the side wall of opposite side, the ajutage is conducted with the air outlet, and first is communicated on the air outlet Exhaust duct and the second exhaust duct, first exhaust duct are conducted with outside, second exhaust duct and the heat pump unit phase Conducting.
Preferably, the air outlet is distributed on from top to bottom on the left side side wall of the hothouse, and the air outlet is from upper It is distributed on down in the right sidewall of the hothouse.
Preferably, plenum chamber, the air outlet and the first row are provided between the ajutage and the air outlet Air hose and the second exhaust duct are provided with return air chamber between the two.
Preferably, the air outlet is distributed on from left to right on the upside side wall of the hothouse, and the air outlet is from a left side It turns right and is distributed on the downside side wall of the hothouse.
Preferably, the cool air hose is inserted through out of described first exhaust duct, and packet is equipped with full heat and hands on the cool air hose Parallel operation, the total-heat exchanger are used for the heat transfer in first exhaust duct to the cold wind tube cavity.
Preferably, the heat pump unit include in set the cabinet of ventilation valve, side wall is from left to right successively above the cabinet Be provided with new air-valve and with the fresh wind port of outside perforation, the air outlet being connected to pressure fan and with the ajutage and institute It states the recuperation of heat air port of cool air hose and second exhaust duct connection, fresh air temperature sensor and fresh air humidity sensor is installed And with the air inlet of outside perforation, outer cold and hot surface cooler and outer wind turbine, the cabinet left side are provided in the cabinet right sidewall The total return air inlet being connected to second exhaust duct is provided on the side wall of side;The cabinet inner cavity is provided with pipe valve component, described It is connected with compressor below pipe valve component, dehumidifying surface cooler and interior cold and hot surface cooler are connected on the left of the pipe valve component;It is described It is connect with the outer cold and hot surface cooler on the right side of pipe valve component.
Preferably, it is provided with primary retirn air mouth and secondary returning air port in total return air inlet, is set in the primary retirn air mouth It is equipped with primary retirn air adjustable plate, secondary return air adjustable plate is provided in the secondary returning air port.
Preferably, the pipe valve component include preceding four-way valve, it is rear four-way valve, outer cold and hot solenoid valve, dehumidify magnetic valve, rear cold Solenoid valve, expansion valve, the first check valve, the second check valve, third check valve, the 4th check valve, the 5th check valve, wherein institute It states exhaust outlet of compressor to connect with the preceding four-way valve port D, the preceding four-way valve port E connects with the rear four-way valve port D It connects, the preceding four-way valve port C is connect with described interior cold and hot surface cooler one end, the preceding four-way valve port S, the rear four-way valve Port S is connected in parallel with the compressor return air mouth, and the rear four-way valve port E is connect with described dehumidifying surface cooler one end, institute It states rear four-way valve port C to connect with described outer cold and hot surface cooler one end, the interior cold and hot surface cooler other end, the described 4th are unidirectionally Valve inlet is connected in parallel with the 5th one-way valved outlet, the outer cold and hot surface cooler other end, second one-way valved outlet It is connected in parallel with the third one-way valve inlet, the dehumidifying surface cooler other end is connect with first one-way valved outlet, institute It states the first one-way valve inlet to connect with dehumidify magnetic valve one end, second one-way valve inlet and described outer cold and hot solenoid valve one end Connection, the third one-way valved outlet, the 4th one-way valved outlet are connected in parallel with the expansion valve inlet, and the described 5th is single To valve inlet with it is described after cold solenoid valve one end connect, the outer cold and hot solenoid valve other end, the dehumidify magnetic valve other end, The cold solenoid valve other end is connected in parallel with the expansion valve outlet after described.
Preferably, the heat pump unit is provided with aeration-drying pattern, combination drying pattern and air conditioner refrigerating pattern, In:
The aeration-drying pattern includes following processes:1. 2. aeration-drying is shut down;
The combination drying pattern includes following processes:1. 2. conversion, 3. return air heating and humid air are shut down in aeration-drying Discharge, 4. return air heating, 5. return air heating with return air refrigeration with humid air discharge, 6. return air heating and return air refrigeration, 7. return air Heating is discharged with return air refrigeration with humid air, 8. return air heating freezes with return air, 9. shuts down;
The air conditioner refrigerating pattern includes following processes:1. air-cooled, 2. just cold, 3. rear cold, 4. standby.
The beneficial effects of the invention are as follows:When drying system provided by the invention is specifically used, if the hollow air water part of hothouse It is higher, aeration-drying is first carried out, i.e., first carries out aeration-drying when material moisture content is higher very fast with material surface layer moisture evaporation, leads to Air-dry it is dry to a certain extent afterwards recycle heat pump unit circulation return air is thermally dried;If itself air moisture content in hothouse When not high, directly circulation return air is thermally dried using heat pump unit, due to the ingenious property of Duct design of the present invention, specifically When dry, can effectively realize each region material in entire hothouse synchronizes effective drying;In addition, in heat pump unit work, Water in material is out mixed with air by heating evaporation, then drying is discharged by carrying out return air heating and humid air, or same Shi Jinhang return air heats and refrigeration is dry is discharged drying with humid air, makes moisture removal maximization and the heat of system provided by the invention Amount is using maximizing, to make material obtain higher aridity.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is the overall structure diagram of the drying system disclosed in the embodiment of the present invention 1;
Fig. 2 is the structural schematic diagram of the heat pump unit disclosed in the embodiment of the present invention 1;
Fig. 3 is the structural schematic diagram of the plenum chamber disclosed in the embodiment of the present invention 1;
Fig. 4 is the structural schematic diagram of the return air chamber disclosed in the embodiment of the present invention 1;
Fig. 5 is the pipe valve component connection diagram under the return air heated condition disclosed in the embodiment of the present invention 2;
Fig. 6 is the pipe valve component connection diagram under return air heating and dehumidified state disclosed in the embodiment of the present invention 2;
Fig. 7 is the pipe valve component connection diagram under the high temperature return air refrigerating state disclosed in the embodiment of the present invention 2;
Fig. 8 is the pipe valve component connection diagram under the return air cryogenic refrigeration state disclosed in the embodiment of the present invention 2;
Fig. 9 is the overall structure diagram of the drying system disclosed in the embodiment of the present invention 3.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation Example is merely a part but not all of the embodiments of the present application.
Based on the embodiment in the application, those of ordinary skill in the art are obtained without making creative work The every other embodiment obtained, shall fall within the protection scope of the present application.
In the description of the present invention, it is to be understood that, the orientation or position of the instructions such as term "upper", "lower", "left", "right" It is to be based on the orientation or positional relationship shown in the drawings to set relationship, is merely for convenience of description of the present invention and simplification of the description, rather than Indicate or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot It is interpreted as limitation of the present invention.
Embodiment 1:
Referring to Fig. 1 to Fig. 4, Fig. 1 to Fig. 4 provides a kind of specific embodiment of drying system of the present invention, wherein Fig. 1 is The overall structure diagram of drying system disclosed in the embodiment of the present invention 1;Fig. 2 is the heat pump disclosed in the embodiment of the present invention 1 The structural schematic diagram of unit;Fig. 3 is the structural schematic diagram of the plenum chamber disclosed in the embodiment of the present invention 1;Fig. 4 is that the present invention is implemented The structural schematic diagram of return air chamber disclosed in example 1.
As shown in Figures 1 to 4, the synchronization of different zones material in hothouse may be implemented in drying system provided by the invention It is dry, greatly optimize the dry mass of material, reduces energy consumption and the time of system operation.The drying system includes heat pump unit 1, Hothouse 2 with air outlet 201 Yu air outlet 202, cool air hose 3, ajutage 4, the first exhaust duct 5, the second exhaust duct 6, air-supply Room 7, return air chamber 8, total-heat exchanger 9.Arrow in attached drawing indicates the flow direction of air.
In the present solution, the drying system includes heat pump unit 1, heat pump unit 1 is used for defeated to the dry offer power of system Go out, including the heating needed for power and dry materials needed for the flowing of drying system inner air and refrigeration are provided.
Hothouse 2 is used to provide dry place to material, and the concrete structure and size of hothouse 2 carry out according to actual needs Selection design.This programme has selected the hothouse 2 of rectangular-shape, and heat pump unit 1 is connected to the right side of hothouse 2.
It is provided with the cool air hose 3 imported for cold wind in heat pump unit 1 and is used for ajutage 4 derived from hot wind, hothouse 2 Be abound with air outlet 201 on the side wall of side, be abound with air outlet 202 on 2 another opposite side side wall of hothouse, ajutage 4 with give Air port 201 is conducted, and the first exhaust duct 5 and the second exhaust duct 6 are communicated on air outlet 202, and the first exhaust duct 5 is mutually led with outside Logical, the second exhaust duct 6 is conducted with heat pump unit 1.
In the present solution, air outlet 201 is distributed on from top to bottom on the left side side wall of hothouse 2, air outlet 202 is from top to bottom It is distributed in the right sidewall of hothouse 2.Plenum chamber 7, air outlet 202 and first are provided between ajutage 4 and air outlet 201 Exhaust duct 5 and the second exhaust duct 6 are provided with return air chamber 8 between the two.Horizontally disposed plenum chamber 7 and horizontally disposed return air chamber 8 play plenum chamber.In this way, hot wind can be input to the inner cavity of hothouse 2 from 201 level of left side air outlet of hothouse 2, Again from 2 right sidewall air outlet of hothouse, 202 horizontal output, air flow region is covered with inside hothouse 2 entire from top to bottom Highly, so as to realize in hothouse 2 material without dead angle, synchronize drying.
In the present solution, air outlet 201 is distributed on from top to bottom on the left side side wall of hothouse 2, air outlet 202 is from top to bottom It is distributed in the right sidewall of hothouse 2.It is of course also possible to select other set-up modes.For example, air outlet 201 and air outlet 202 width changes from small to big from top to bottom.In other words, air outlet 201 and air outlet 202 is of same size, but adjacent air outlet Back gauge between 201 and air outlet 202 is changed from small to big from top to bottom.In this way, the multiple horizontal slots for passing through above-mentioned special designing Air outlet 201 and horizontal slot air outlet 202, the hot wind that level is sent to drying shed 2 changes from small to big from top to bottom and held stationary, The heat that the material in drying shed 2 obtains is set to change from small to big from top to bottom and held stationary, so as to balance hot gas gently up The phenomenon for rising and keeping 2 top temperature of drying shed higher than lower section further reaches the dry materials time basic one above and below in drying shed 2 The requirement of cause.
In the present solution, to further facilitate the recycling of heating power, heat is avoided to be directly discharged to cause to waste in air, Cool air hose 3 is inserted through out of first exhaust duct 5, and packet is equipped with total-heat exchanger 9 on cool air hose 3, and total-heat exchanger 9 is used for the Heat transfer in one exhaust duct 5 is to 3 inner cavity of cool air hose, in this way, the waste heat of air in the first exhaust duct 5 can be utilized to add in advance The cold air of 3 inner cavity of hot cool air hose.
In the present solution, to further facilitate the output and control of power, a kind of energy-efficient heat pump unit is provided.It should Heat pump unit 1 includes cabinet 101, ventilation valve 102, new air-valve 103, fresh wind port 104, pressure fan 105, air outlet 106, recuperation of heat Air port 107, air inlet 108, outer cold and hot surface cooler 109, outer wind turbine 110, total return air inlet 111, pipe valve component 112, compressor 113, dehumidify surface cooler 114 and interior cold and hot surface cooler 115.
Ventilation valve 102 is equipped in cabinet 101, break-make of the ventilation valve 102 for each wind path controls, 101 top of the cabinet Side wall be set gradually from left to right with new air-valve 103 and with the fresh wind port 104 of outside perforation, with pressure fan 105 and with institute The air outlet 106 for stating the connection of ajutage 4, the recuperation of heat air port 107 being connected to the cool air hose 3 and second exhaust duct 6, peace The air inlet 108 penetrated through equipped with fresh air temperature sensor C1 with fresh air humidity sensor H1 and with outside, right 101 sides of the cabinet It is provided with outer cold and hot surface cooler 109 and outer wind turbine 110 on side wall, is provided with and described second on 101 left side side wall of the cabinet Total return air inlet 111 that exhaust duct 6 is connected to.
101 inner cavity of cabinet is provided with pipe valve component 112, and 112 lower section of the pipe valve component is connected with compressor 113, described 112 left side of pipe valve component is connected with dehumidifying surface cooler 114 and interior cold and hot surface cooler 115;The right side of the pipe valve component 112 with it is described Outer cold and hot surface cooler 109 connects.
To further realize the control of return air direction and flow in heat pump unit 1, it is preferable that in total return air inlet 111 It is provided with primary retirn air mouth and secondary returning air port, primary retirn air adjustable plate, the secondary returning are provided in the primary retirn air mouth Secondary return air adjustable plate is provided in air port.Specifically, primary retirn air mouth leads directly to 1 inner cavity of heat pump unit, secondary returning air port To 1 inner cavity of heat pump unit after the surface cooler that dehumidifies.
In specific implementation process, secondary return air first pass through dehumidifying 114 refrigerated dehumidification of surface cooler, then with primary retirn air mouth Circulation return air mixes, then is heated by interior cold and hot surface cooler 115, therefore the resistance of secondary return air is more than primary retirn air;By primary The adjusting of return air adjustable plate and secondary return air adjustable plate can be such that primary retirn air amount and secondary returning air quantity ratio reaches and suitably want It asks.
When refrigerated dehumidification, the 114 secondary return air outlet air of dehumidifying surface cooler will be less than dew-point temperature, the vaporous water in secondary return air Could condense to liquid, thus secondary returning air quantity should by disengaging dehumidifying 114 temperature difference of surface cooler it is larger, the more requirement of condensed water into Row.It when fresh air water capacity is less than return air water capacity, is opened by pressure fan operation, new air-valve, exhaust fan operation, fresh air sucking When first pass through in advance total-heat exchanger 9 heat after uniformly mixed with return air, humid air is discharged by the first exhaust duct 5 in drying shed 2, Reach the requirement of dry materials.
When humid air is discharged, the too small then humid air discharge of fresh air volume is too small, and the too small then dry materials time is discharged in humid air It is long;The too big then humid air discharge of fresh air volume is excessive, and humid air discharge is excessive, and baking temperature can decline excessive in drying shed 2, together The sample meeting dry materials time is long;The size that fresh air volume is adjusted when adjustable plate is run for the first time for system can be set in fresh wind port, By the adjusting of adjustable plate regulating tuyere size, adjusts fresh air volume size and reach suitable requirement.
In this way, by the adjusting of primary retirn air amount and secondary returning air quantity ratio and size, changing for dehumidifying surface cooler is reached The refrigerating capacity Optimized Matching of heat and compressor, solving conventional heat pump drying system, surface cooler return air is excessive to ask by dehumidifying Topic.
In the present embodiment, pressure fan 105 is connected by ajutage 4 with horizontally disposed plenum chamber 7 in heat pump unit 1, water The horizontal slot air outlet 201 on the right side of flat plenum chamber 7 is communicated with 2 inner cavity of hothouse, 2 inner cavity of hothouse and horizontal return air chamber 8 it Between communicated by horizontal slot air outlet 202, horizontal return air chamber 8 is connected with the first exhaust duct 5, the second exhaust duct 6, the first air draft Wind is expelled to outside by pipe 5, and the second exhaust duct 6 (this attached drawing include above and below two at) is finally connected with heat pump unit 1.
In the present embodiment, drying system makes air obtain mobilization dynamic by the driving of pressure fan 105, including from heat pump machine Group 1 is output to the hot air flow of hothouse 2 and enters the return of heat pump unit 1 from hothouse 2, in addition, passing through heat pump unit 1 Heating and refrigeration, the removal of moisture in air may be implemented.
A kind of horizontal blast structure is present embodiments provided, hot wind enters horizontal blast room 7 by ajutage 4, passes through level The horizontal slot air outlet 201 on 7 right side of plenum chamber, hot-air, which is flatly sent in hothouse 2, makes material heat, and makes in material Moisture evaporation precipitation is mixed with air, then flows into horizontal return air chamber 8 by horizontal slot air outlet 202, then pass through second row Air hose 6 arrives heat pump unit, and the air in hothouse 6 is made to obtain circulating-heating and refrigeration.
When system operation, the cold air of relatively dry is mixed with the primary retirn air for entering heat pump unit from primary retirn air mouth, Then heat release and partition-wall heat transfer are condensed by the high temperature refrigerant in interior cold and hot surface cooler 115 together, makes air by heating and drying; The secondary return air for entering heat pump unit 1 from secondary returning air port, first pass through dehumidifying surface cooler 114 carry out low temperature refrigerant evaporation endothermic with Partition-wall heat transfer makes these secondary return airs after refrigerated dehumidification (condensed water is discharged by drip tray) again by interior cold and hot surface cooler 115 Heating.
It is air-dried in heating process, is beaten when humid air water capacity subtracts new air-valve 103 when fresh air water capacity is greater than the set value It opens, fresh air enters heat pump unit 1 after being mixed with return air after the preheating of total-heat exchanger 9, and humid air passes through first row in hothouse 2 Air hose 5 and the second exhaust duct 6 are discharged, and air obtains drying by displacement in hothouse 2;Fresh air passes through 9 partition of total-heat exchanger Recycling needs the temperature discharged compared with the partial heat in highly humid air, achievees the purpose that fresh air preheating and energy saving of system.
In the present invention, ventilation valve is located between pressure fan and interior cold and hot surface cooler, and ventilation valve is directly connected to cabinet:Pass through Pressure fan operation, ventilation valve are opened, and a large amount of fresh airs enter pressure fan by ventilation valve suck, in hothouse 2 and fresh air equivalent Humid air be discharged by the first exhaust duct 5, the moisture content for reaching dry materials initial stage is higher, leading ventilated energy-saving drying early period It is required that.
In addition, opening the side door of cabinet when system-down is safeguarded, interior cold and hot surface cooler and dehumidifying can be thoroughly cleaned with hydraulic giant The combustible dust and greasy dirt adhered on surface cooler, sewage will be accessed by drip tray and discharge, ensure the safety of system with it is reliable Property.Because the pressure fan of heat pump unit is located above cabinet, interior cold and hot surface cooler does not have other electric appliances with dehumidifying surface cooler space, therefore Interior cold and hot surface cooler can wash by water with dehumidifying surface cooler.
Generally speaking, the invention has the advantages that:
One, the drying system provided by the invention can control dehumidifying table in time by being operated to heat pump unit 1 Return air amount, the humid air discharge rate of the return air amount of cooler 114, outer cold and hot surface cooler 109 and interior cold and hot surface cooler 115, Yi Jire The heating capacity and refrigerating capacity of pump assembly 1 itself can greatly meet the requirement of thermal balance and Optimized Matching.
Secondly, the drying system provided by the invention solve in conventional equipment hothouse 2 that air-supply is uneven with return air, with And the non-uniform problem of size is discharged in humid air, present invention can ensure that the drying of material basic synchronization, i.e. solution office in hothouse 2 The problem of portion's temperature of charge is relatively low and improper ventilation, and will not additionally increase the run time of heat pump unit because of the drying of the material With energy consumption.
Thirdly, the present invention according to the indoor and outdoor temperature and relative humidity pa that change at any time, provide a kind of intelligent dry Drying system allows the present invention to reach aeration-drying, drying of freezing is combined with humid air discharge drying, realization moisture removal maximum. Meanwhile it can be with the reduction of indoor material gradual drying and relative air humidity, using different drying modes, Intelligent Optimal control Process processed, this part will illustrate in example 2 in detail.
Embodiment 2:
Referring to Fig. 5 to Fig. 8, Fig. 5 to Fig. 8 provides a kind of another specific embodiment of drying system of the present invention, wherein Fig. 5 is the pipe valve component connection diagram under the return air heated condition disclosed in the embodiment of the present invention 2;Fig. 6 is that the present invention is implemented The pipe valve component connection diagram under return air heating and dehumidified state disclosed in example 2;Fig. 7 is disclosed in the embodiment of the present invention 2 High temperature return air refrigerating state under pipe valve component connection diagram;Fig. 8 is the return air low temperature system disclosed in the embodiment of the present invention 2 Pipe valve component connection diagram under cold state;
As shown in Fig. 5 to Fig. 8, pipe valve component provided in this embodiment includes preceding four-way valve 30, rear four-way valve 31, outer cold and hot Solenoid valve 32, dehumidify magnetic valve 33, rear cold solenoid valve 34, expansion valve 35, the first check valve 36, the second check valve 37, third list To valve 38, the 4th check valve 39, the 5th check valve 40, wherein 113 exhaust outlet of the compressor and 30 port of preceding four-way valve D connections, 30 port E of the preceding four-way valve with it is described after 31 port D of four-way valve connect, 30 port C of the preceding four-way valve with it is described Interior 115 one end of cold and hot surface cooler connection, 30 port S of the preceding four-way valve, the rear 31 port S of four-way valve and the compressor 113 gas returning ports are connected in parallel, and the rear 31 port E of four-way valve is connect with described 114 one end of dehumidifying surface cooler, the rear four-way valve 31 port C are connect with described outer 109 one end of cold and hot surface cooler, interior 115 other end of cold and hot surface cooler, the 4th check valve 39 entrances are connected in parallel with the 5th check valve 40 outlet, outer 109 other end of cold and hot surface cooler, second check valve 37 outlets are connected in parallel with 38 entrance of third check valve, 114 other end of dehumidifying surface cooler and first check valve 36 outlet connections, 36 entrance of the first check valve connect with 33 one end of dehumidify magnetic valve, 37 entrance of the second check valve and Outer cold and hot solenoid valve one end connection, the third one-way valved outlet, the 4th one-way valved outlet enter with the expansion valve Mouth is connected in parallel, and the 5th one-way valve inlet is connect with described rear cold solenoid valve one end, the outer cold and hot solenoid valve other end, The dehumidify magnetic valve other end, the rear cold solenoid valve other end are connected in parallel with the expansion valve outlet.
Preferably, the heat pump unit 1 is provided with aeration-drying pattern, combination drying pattern and air conditioner refrigerating pattern, In:
The aeration-drying pattern includes following processes:1. 2. aeration-drying is shut down;
The combination drying pattern includes following processes:1. 2. conversion, 3. return air heating and humid air are shut down in aeration-drying Discharge, 4. return air heating, 5. return air heating with return air refrigeration with humid air discharge, 6. return air heating and return air refrigeration, 7. return air Heating is discharged with return air refrigeration with humid air, 8. return air heating freezes with return air, 9. shuts down;
The air conditioner refrigerating pattern includes following processes:1. air-cooled, 2. just cold, 3. rear cold, 4. standby.
In the present embodiment, do not commutated by energization commutation and the power-off of preceding four-way valve 30 and rear four-way valve 31, outer cool and thermal power The energization of magnet valve 32, dehumidify magnetic valve 33 and rear cold solenoid valve 34 is opened closes with power-off, and refrigerant flow path realizes four kinds of not cocurrent flows The operation in dynamic circuit;Again by compressor 113 and pressure fan 105 be powered operation, system return air heat, it is heating+refrigeration, first It is cold with sent out after rear cold four kinds of different modes processing, i.e. four combined supply heat pump units.Meanwhile because cooling module connection structure guarantor Card, when heat pump unit runs different refrigerant flow paths, refrigerant does not flow and does not participate in the surface cooler of heat exchange always in three surface coolers In low-pressure end, i.e., the refrigerant in the surface cooler ensures that refrigerant flowing is steady, not will produce hydrops and pressure wave always at gaseous state end It is dynamic.
In specific implementation, external controller according to new air temperature, fresh air relative humidity, return air temperature, return air relative humidity, Fresh air water capacity, the variation of each parameter such as return air water capacity, by established procedure from the pressure fan 105, outer in trend drying system Wind turbine 110, preceding four-way valve 30, rear four-way valve 31, outer cold and hot solenoid valve 32, dehumidify magnetic valve 33, rear cold solenoid valve 34, new air-valve 103, the signal of the break-make operation different from each load output such as compressor 113 of ventilation valve 102, to obtain different loads combination Control.
In the present embodiment, controlled by the load combinations to the different break-makes of each load, can obtain aeration-drying pattern, Combination drying pattern and three kinds of operating modes of air conditioner refrigerating pattern, aeration-drying pattern are equipped with 1. aeration-drying and 2. shut down two kinds The operation process of different loads combination is equipped with 1. aeration-drying in combination drying pattern, 2. shuts down conversion, 3. return air heating+wet Air discharge, 4. return air heating, 5. return air heating+return air refrigeration+humid air discharge, 6. return air heating+return air refrigeration, 7. return air The operation work that heating+return air refrigeration+humid air discharge, 8. return air heating+return air refrigeration are combined with the nine kinds of different loads that 9. shut down Be equipped in sequence and air conditioner refrigerating pattern it is 1. air-cooled, 2. it is just cold, 3. after it is cold with operation work that 4. standby four kinds of different loads combine Sequence.
Specifically, when new air temperature less than setting value (as -9 DEG C) or is higher than setting value (such as 45 DEG C), to prevent compressor 113 overheating operations, the automatic alarm if in standby mode of heat pump unit 1, heat pump unit 1 if in operating status autostop with Alarm.When in the range of new air temperature being in setting (between such as -8 DEG C~44 DEG C), heat pump unit 1 keeps standby or operation shape State, controller have three kinds of aeration-drying, combination drying and air conditioner refrigerating operating modes.
Just above-mentioned three kinds of operating modes are specifically described below.
One, aeration-drying pattern
Process one, aeration-drying
Pressure fan, which is powered, as return air water capacity-fresh air water capacity >=setting value (such as 12g/kg), in load combinations runs, Ventilation valve, which is powered, to be opened.The air of a large amount of outdoor relatively dries is sucked from ventilation valve, and equivalent humid air is from humid air in hothouse 2 It is discharged at the first exhaust duct of channel 5.
Process two, shutdown
As return air water capacity-fresh air water capacity≤setting value (such as 10g/kg), controller shutdown:It blows in load combinations Machine power-off is shut down, and ventilation valve, which is powered, closes, and shows that this operation is completed.
The pattern heat pump unit is not involved in operation, and system operating power is small, is suitable for that fresh air is relatively dry, dry requires not High and drying time can be compared with the drying of long material.
Two, combination drying pattern
Process one, aeration-drying
Pressure fan, which is powered, as return air water capacity-fresh air water capacity >=setting value (such as 20g/kg), in load combinations runs It is powered and opens with ventilation valve, the air of a large amount of outdoor relatively dries is sucked from ventilation valve, and equivalent humid air is from first in hothouse 2 Exhaust duct 5 is discharged.The process is suitable for dry materials front surface band water or the higher initial stage drying of moisture content.
Process two shuts down conversion
As return air water capacity-fresh air water capacity≤setting value (such as 18g/kg), pressure fan power-off shutdown in load combinations It is powered and closes with ventilation valve, controller autostop is converted to subsequent processing.
Process three, return air heating+humid air discharge
When return air relative humidity >=setting value (such as 21%), and return air temperature≤setting value (such as 50 DEG C), and return air is containing wet Pressure fan, which is powered, when amount-fresh air water capacity >=setting value (such as 26g/kg), in load combinations runs, outer wind turbine energization operation, presses Opening that contracting machine energization operation, the energization of rear four-way valve are converted, outer cold and hot solenoid valves are opened and new air-valve is powered.In hothouse 2 Air circulation is by cold and hot surface cooler in heat pump unit and is heated, and fresh air is inhaled into after the preheating of total-heat exchanger 9, wet sky Gas is discharged from the first exhaust duct 5.When system operation, as humid air discharge reduces with air humidity content in hothouse 2, except drying Thermal loss and heat preservation thermal loss is discharged in air, and the heat that compressor operating generates is precipitated more than moisture evaporation in material to be absorbed Heat, the air in hothouse 2 can gradually heat up;The cold that compressor operating generates, passes through outer cold and hot surface cooler and exogenous wind The operation of machine recycles heat exchange with outdoor air, and as heat is transferred to air in hothouse 2 in refrigerant absorption outdoor air Process.The process heat pump unit refrigerant flow path heats for return air.
Process four, return air heating
When return air relative humidity >=setting value (such as 21%), and return air temperature≤setting value (such as 50 DEG C), and return air is containing wet Pressure fan, which is powered, when amount-fresh air water capacity≤setting value (such as 24g/kg), in load combinations runs, outer wind turbine energization operation, presses Contracting machine energization operation, rear four-way valve, which are powered, to be converted and outer cold and hot solenoid valves opening.Air circulation passes through heat pump in hothouse 2 The interior cold and hot surface cooler of unit is simultaneously heated, and heat preservation thermal loss is removed, and the heat that compressor operating generates is more than water in material The heat absorbed is precipitated in part evaporation, and air is by heating and gradually heating in hothouse 2.At this point, return air water capacity and fresh air are containing wet Amount is not much different, and does not run humid air discharge, avoids outdoor humid air from bringing the negative interaction that temperature reduces in hothouse 2, and can The temperature of material in improving as possible, to increase the kinetic energy that moisture evaporation escapes in material.The process heat pump unit refrigerant flow path is Return air heats.
Process five, return air heating+return air refrigeration+humid air discharge
When return air relative humidity >=setting value (such as 21%), setting value (such as 51 DEG C)≤and return air temperature≤setting value is (such as 59 DEG C) when, and when return air water capacity-fresh air water capacity >=setting value (such as 23g/kg), in load combinations pressure fan be powered operation, Compressor energization operation, dehumidify magnetic valve are powered to opening and be opened with new air-valve energization.Pass through the secondary return air quilt for the surface cooler that dehumidifies Circularly cooling dehumidifies, i.e., vapor encounters colder surface heat release and is condensed water and is discharged by drip tray in humid air, passes through After the secondary return air of dehumidifying surface cooler is mixed with primary retirn air, pass through interior cold and hot surface cooler circulating-heating;Fresh air is through Total heat exchange Device 9 sucks after heating, and humid air is discharged from the first exhaust duct 5.Remove humid air discharge thermal loss and heat preservation thermal loss, heat It pumps refrigerating capacity to balance with secondary return air caloric receptivity, caloric receptivity, secondary return air system is precipitated with moisture evaporation in material in heat pump heating capacity Heating amount and fresh air heat heat balance after cold, and with the reduction of moisture content in material, and caloric receptivity is precipitated in moisture evaporation in material It can gradually decrease, being sent into the temperature of 2 return air of hothouse can also gradually rise.The process heat pump unit refrigerant flow path heats for return air Freeze with return air.
Process six, return air heating+return air refrigeration
When return air relative humidity >=setting value (such as 21%), setting value (such as 51 DEG C)≤and return air temperature≤setting value is (such as 59 DEG C) when, and when return air water capacity-fresh air water capacity≤setting value (such as 21g/kg), in load combinations pressure fan be powered operation, Compressor is powered to running to be powered with dehumidify magnetic valve and open.It is dehumidified by circularly cooling by the secondary return air for the surface cooler that dehumidifies, i.e., Vapor encounters colder surface heat release and is condensed water and is discharged by drip tray in humid air, passes through the secondary of surface cooler that dehumidify After return air is mixed with primary retirn air, pass through interior cold and hot surface cooler circulating-heating.The process heat pump unit refrigerant flow path adds for return air Heat is freezed with return air.
Process seven, return air heating+return air refrigeration+humid air discharge
When return air relative humidity >=setting value (such as 21%), and return air temperature >=setting value (such as 60 DEG C), and return air is containing wet Pressure fan, which is powered, when amount-fresh air water capacity >=setting value (such as 20g/kg), in load combinations runs, compressor energization operation, removes Wet solenoid valves are opened to be powered with new air-valve and be opened.The process heat pump unit refrigerant flow path is that return air heating is freezed with return air.
Process eight, return air heating+return air refrigeration
When return air relative humidity >=setting value (such as 21%), and return air temperature >=setting value (such as 60 DEG C), and return air is containing wet Pressure fan, which is powered, when amount-fresh air water capacity≤setting value (such as 18g/kg), in load combinations runs, compressor energization operation, removes Wet solenoid valves are opened.The process heat pump unit refrigerant flow path is that return air heating is freezed with return air.
Process nine, shutdown
When return air relative humidity≤setting value (such as 20%), and retention time >=setting value (such as 20min), system is in process 5. return air heating+return air refrigeration+humid air discharge, 6. return air heating+return air refrigeration, 7. return air heating+return air refrigeration+humid air When discharge is with 8. return air heating+return air refrigerating operaton, controller shutdown, and show that this operation is completed.
Combination drying mode operation explanation:
1, controller is according to the new air temperature of detection, fresh air relative humidity, return air temperature and return air relative humidity, Yi Jiji The fresh air water capacity of calculation and return air water capacity, according to control condition in 1. aeration-drying, 3. return air heating, 4. return air heating+wet Air discharge, 5. return air heating+return air refrigeration+humid air discharge, 6. return air heating+return air refrigeration, 7. return air heating+return air system A process is automatically selected in cold+humid air discharge, 8. return air heating+return air seven processes of refrigeration to bring into operation.Such as this seven Process service condition is all unsatisfactory for, then controller does not run and shows that material is not necessarily to drying.
2, system is run according to the process of said combination drying mode, and controller has reached aeration-drying, humid air discharge With moisture removal maximum mechanism when return air refrigeration combination application, and the drop with indoor material gradual drying and relative air humidity It is low, using different drying modes, the requirement of intelligent and optima l control:The moisture content that i.e. material starts is higher, and dry materials are answered early period First carry out aeration-drying;Moisture content as material starts is not high, and the middle and later periods should be return air heating+humid air discharge+return air refrigeration It is carried out respectively with return air heating+return air refrigeration, material dehumidifying is made comparatively fast to be fully used with heat and the aridity of material It is higher.
3, the discharge of system operation fresh air sucking and humid air, according to the low then return air water capacity of return air temperature with fresh air containing wet The difference of amount is larger, and then return air water capacity carries out return air temperature height with the smaller Optimization Mechanism of the difference of fresh air water capacity;Material When dry return air temperature rise very fast, return air relative humidity will not excessively high, dry materials speed and deformation it is smaller.
4, Traditional control is avoided during return air is begun to warm up, and not or is difficult to accurately be arranged what humid air was discharged Operation, humid air cannot be discharged in time keeps return air water capacity excessive, and return air temperature is caused to rise slower problem;The reason for this is that water The specific heat of steam is far longer than dry air, and the heat that washy humid air temperature rise needs is far longer than the few wet sky of moisture Gas.
5, air humidity content is the function of temperature and relative humidity, and controller is calculated by respective formula, then is obtained return air and contained The difference of moisture and fresh air water capacity.Because air humidity content adequately reflects aqueous how many parameter in unit air, therefore it is System carries out Dehumidification controlling using the difference of return air water capacity and fresh air water capacity, is a kind of optimization and be accurately controlled mode.
Three, air conditioner refrigerating pattern
The pattern makes temperature in hothouse 2 for being quickly cooled down hothouse 2 and material after the completion of combination drying mode operation Comfortably, so as to quickly have enough to meet the need material and improve work efficiency.Air conditioner refrigerating pattern chooses whether to run as needed.
It is process one, air-cooled
When pressure fan energization operation is opened with ventilation valve energization in return air temperature >=setting value (such as 50 DEG C), load combinations. The fresh air of a large amount of relative low temperatures is inhaled into ajutage from ventilation valve, and the hot-air in hothouse 2 is discharged by the first exhaust duct 5.
The process is mixed using relative low temperature fresh air with hot-air in hothouse 2, has the function that energy-saving cool-down, and avoid Drying heat pump compressor structure is not suitable for the problem of high temperature air cooling, while also utilizing fresh air and hothouse 2 When interior high temperature air mixing, because the moisture of fresh air can be discharged with mixing air, without influencing 2 dry materials degree of hothouse Mechanism.
It is process two, first cold
Setting value (such as 49 DEG C)≤and when return air temperature≤setting value (such as 36 DEG C), pressure fan energization fortune in load combinations Capable, outer wind turbine energization operation, compressor energization operation, preceding four-way valve are powered to converting and be opened with dehumidify magnetic valve energization.By removing The fortune that the secondary return air of wet surface cooler passes through outer cold and hot surface cooler and outer wind turbine by circularly cooling, the heat that compressor operating generates Row recycles heat exchange with outdoor air.The process heat pump unit refrigerant flow path is cold at the beginning of return air.
The process reduces the evaporating temperature of refrigerant, makes using the refrigeration of dehumidifying surface cooler small air quantity and the big temperature difference Thermo-compression evaporation temperature is moderate with condensation temperature, so that the compression ratio of compressor is run in more excellent range, adapts compressor to drying The refrigeration of higher temperature air and cooling in room 2.
It is process three, rear cold
Setting value (such as 35 DEG C)≤and when return air temperature≤setting value (such as 16 DEG C), pressure fan energization fortune in load combinations Capable, outer wind turbine energization operation, compressor energization operation, the energization of preceding four-way valve is converted, rear cold solenoid valves are opened.By interior cold The return air of hotlist cooler by circularly cooling, heat that compressor operating generates by the operation of outer cold and hot surface cooler and outer wind turbine with Outdoor air recycles heat exchange.The process heat pump unit refrigerant flow path is cold after return air.
The process utilizes the refrigeration of interior cold and hot surface cooler Wind Volume and the small temperature difference, improves the evaporating temperature of refrigerant, Keep thermo-compression evaporation temperature moderate with condensation temperature, compressor is made to achieve the effect that lower temperature refrigeration, meets partial material drying The requirement for needing low temperature to have enough to meet the need afterwards.
It is process four, standby
When return air temperature≤setting value (such as 15 DEG C), controller is standby, and except pressure fan remains powered on operation, remaining is loaded Power-off;When return air temperature >=setting value (such as 16 DEG C), automated system operation process three.
In conclusion the present invention has quick, efficient, energy saving, intelligent control, optimization operation, safe and reliable, cost not The feature low with operating cost high, easy to operate, easy to maintain.
Embodiment 3:
Referring to Fig. 9, Fig. 9 provide the present invention another specific embodiment, wherein Fig. 9 by the embodiment of the present invention 3 public affairs The overall structure diagram for the drying system opened.
In the present embodiment, air outlet 201 is distributed on from left to right on the upside side wall of the hothouse 2, air outlet 202 from It is distributed on from left to right on the downside side wall of the hothouse 2.
In the present embodiment, pressure fan 105 is by ajutage 4 with vertically arranged plenum chamber (by the horizontally disposed of embodiment 1 Plenum chamber be adjusted to vertical plenum chamber) be connected, the vertical ventilation mouth 201 for being arranged vertically plenum chamber is communicated with hothouse 2, is gone out Air port 202 is communicated with hothouse 2, can be finally connected with total return air inlet of heat pump unit by the second exhaust duct 6.
In specific implementation process, by vertically arranged air outlet 201, hot-air is vertically sent to hothouse from top to bottom So that material is heated in 2, so that moisture evaporation precipitation in material is mixed with air, 2 bottom of hothouse is then entered by air outlet 202 The return air interlayer (return air interlayer can preferably realize the circulation cycle of air) set is stayed, heat pump is returned to by the second exhaust duct 6 Unit 1 makes the air in hothouse 2 obtain circulating-heating and refrigeration.
A kind of drying system provided by the present invention is described in detail above.Specific case pair used herein The principle of the present invention and embodiment are expounded, and the explanation of above example is only intended to help to understand method of the invention And its core concept.It should be pointed out that for those skilled in the art, before not departing from the principle of the invention It puts, can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the guarantor of the claims in the present invention It protects in range.

Claims (9)

1. a kind of drying system, which is characterized in that including heat pump unit and hothouse, be provided with for cold in the heat pump unit The cool air hose and be used for ajutage derived from hot wind that wind imports, have been abound with air outlet on the side wall of the hothouse side, described dry It is abound with air outlet on the dry another opposite side side wall in room, the ajutage is conducted with the air outlet, connects on the air outlet It is connected with the first exhaust duct and the second exhaust duct, first exhaust duct is conducted with outside, second exhaust duct and the heat Pump assembly is conducted.
2. drying system according to claim 1, which is characterized in that the air outlet is distributed on the drying from top to bottom On the left side side wall of room, the air outlet is distributed on from top to bottom in the right sidewall of the hothouse.
3. drying system according to claim 2, which is characterized in that be provided between the ajutage and the air outlet Plenum chamber, the air outlet are provided with return air chamber between the two with first exhaust duct and the second exhaust duct.
4. drying system according to claim 1, which is characterized in that the air outlet is distributed on the drying from left to right On the upside side wall of room, the air outlet is distributed on from left to right on the downside side wall of the hothouse.
5. drying system according to claim 1, which is characterized in that the cool air hose interts out of described first exhaust duct Pass through, packet is equipped with total-heat exchanger on the cool air hose, and the total-heat exchanger is used for the heat in first exhaust duct It is transferred to the cold wind tube cavity.
6. drying system according to claim 1, which is characterized in that the heat pump unit includes the interior machine for setting ventilation valve Case, above the cabinet side wall be set gradually from left to right with new air-valve and with the fresh wind port of outside perforation, carry pressure fan And be connected to the ajutage air outlet, be connected to the cool air hose and second exhaust duct recuperation of heat air port, installation There is the air inlet that fresh air temperature sensor is penetrated through with fresh air humidity sensor and with outside, is provided in the cabinet right sidewall Outer cold and hot surface cooler and outer wind turbine are provided with the total return air inlet being connected to second exhaust duct on the left of the cabinet on side wall; The cabinet inner cavity is provided with pipe valve component, and compressor is connected with below the pipe valve component, is connected on the left of the pipe valve component There are dehumidifying surface cooler and interior cold and hot surface cooler;It is connect with the outer cold and hot surface cooler on the right side of the pipe valve component.
7. drying system according to claim 6, which is characterized in that be provided in total return air inlet primary retirn air mouth with Secondary returning air port is provided with primary retirn air adjustable plate in the primary retirn air mouth, secondary returning is provided in the secondary returning air port Wind adjustable plate.
8. drying system according to claim 7, which is characterized in that the pipe valve component includes preceding four-way valve, rear four-way Valve, outer cold and hot solenoid valve, dehumidify magnetic valve, rear cold solenoid valve, expansion valve, the first check valve, the second check valve, third are unidirectional Valve, the 4th check valve, the 5th check valve, wherein the exhaust outlet of compressor is connect with the preceding four-way valve port D, before described Four-way valve port E is connect with the rear four-way valve port D, and the preceding four-way valve port C connects with described interior cold and hot surface cooler one end It connects, the preceding four-way valve port S, the rear four-way valve port S are connected in parallel with the compressor return air mouth, the rear four-way valve Port E is connect with described dehumidifying surface cooler one end, and the rear four-way valve port C is connect with described outer cold and hot surface cooler one end, institute State the interior cold and hot surface cooler other end, the 4th one-way valve inlet is connected in parallel with the 5th one-way valved outlet, described outer cold The hotlist cooler other end, second one-way valved outlet and the third one-way valve inlet are connected in parallel, the dehumidifying surface cooler The other end is connect with first one-way valved outlet, and first one-way valve inlet is connect with dehumidify magnetic valve one end, and described Two one-way valve inlets are connect with described outer cold and hot solenoid valve one end, the third one-way valved outlet, the 4th one-way valved outlet It is connected in parallel with the expansion valve inlet, the 5th one-way valve inlet is connect with described rear cold solenoid valve one end, described outer cold The thermoelectrical magnetic valve other end, the dehumidify magnetic valve other end, the rear cold solenoid valve other end are in parallel with the expansion valve outlet Connection.
9. drying system according to claim 1, which is characterized in that the heat pump unit be provided with aeration-drying pattern, Combination drying pattern and air conditioner refrigerating pattern, wherein:
The aeration-drying pattern includes following processes:1. 2. aeration-drying is shut down;
The combination drying pattern includes following processes:1. 2. conversion, 3. return air heating and humid air row are shut down in aeration-drying Go out, 4. return air heating, 5. return air heating with return air refrigeration with humid air discharge, 6. return air heat with return air freeze, 7. return air adds Heat is discharged with return air refrigeration with humid air, 8. return air heating freezes with return air, 9. shuts down;
The air conditioner refrigerating pattern includes following processes:1. air-cooled, 2. just cold, 3. rear cold, 4. standby.
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