CN109539762A - A kind of composition open and close formula circulating heat pump drying system - Google Patents

A kind of composition open and close formula circulating heat pump drying system Download PDF

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Publication number
CN109539762A
CN109539762A CN201811442484.XA CN201811442484A CN109539762A CN 109539762 A CN109539762 A CN 109539762A CN 201811442484 A CN201811442484 A CN 201811442484A CN 109539762 A CN109539762 A CN 109539762A
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CN
China
Prior art keywords
outlet
drying
import
outdoor
heat pump
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Pending
Application number
CN201811442484.XA
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Chinese (zh)
Inventor
伍晓锋
李书明
刘寅
张莱林
张磊
李少庆
高龙
闫俊海
孟照峰
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Henan Sino Swiss Refrigeration Technology Co Ltd
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Henan Sino Swiss Refrigeration Technology Co Ltd
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Priority to CN201811442484.XA priority Critical patent/CN109539762A/en
Publication of CN109539762A publication Critical patent/CN109539762A/en
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Classifications

    • 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
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00Fluid heaters characterised by the use of heat pumps
    • F24H4/06Air heaters
    • 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
    • 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
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • 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
    • F26B21/004Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • 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
    • F26B21/04Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the 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
    • F26B21/06Controlling, e.g. regulating, parameters of gas supply

Abstract

The invention discloses a kind of composition open and close formula circulating heat pump drying systems, including baking room, heat pump drying subsystem and drying air circulation subsystem;Heat pump drying subsystem includes compressor, main condenser, indoor evaporator, outdoor heat exchanger, liquid storage device, device for drying and filtering and gas-liquid separator;Drying air circulation subsystem includes air outlet, the return air inlet being connected with baking room by air duct, and main condenser is arranged in the position of corresponding return air inlet, breeze fan is equipped at air outlet;Return air inlet includes bypass air duct and dehumidifying air duct, and heat exchange of heat pipe evaporator section is successively passed through in air duct by baking room, heat exchange of heat pipe condensation segment is connected to main condenser position for dehumidifying;It bypasses air duct and main condenser position is connected to by baking room.Work efficiency is high, structure is simple by the present invention, small in size, work is more stable, has the function of that open type and two kinds of enclosed, system heating rate still dehumidify fastly, during defrost.

Description

A kind of composition open and close formula circulating heat pump drying system
Technical field
The present invention relates to drying equipment technologies, and in particular to a kind of composition open and close formula circulating heat pump drying system.
Background technique
Currently, common heat pump drying device is divided into open circulation heat pump drying device in the market and closed cycle heat pump is dry Dry device.Open circulation heat pump drying device is absorbed heat using evaporator in outdoor environment, and baking is heated using the heat of condenser The material of stove room, temperature humidity reaches setting value in room to be dried, and outdoor, supplement one is discharged in the air of a part of high temperature and humidity Partially new air is usually provided with air heat recovery device to recycle the heat of a part discharge air.Closed cycle heat pump is dry Dry device makes circulation air cool down and condensate moisture therein is discharged using evaporator, then is heated to air by condenser Required temperature is sent into baking room, to achieve the purpose that removal moisture drying, the friendship of air heat is usually provided with before and after evaporator Parallel operation carries out heat recovery.
Two kinds of heat pump drying devices cut both ways: open type heat pump drying device heating rate is fast, but heat during hydrofuge Lose larger, outdoor air can pollute material drying, and in low ambient temperature, heat decay is larger, frequent defrost is even unable to work Make, baking room temperature reduces more during defrost;Enclosed heat pump drying device effect on moisture extraction is good, material is not contaminated, but rises Warm speed is too slow, fully relies on electric heating and heats up, energy consumption is higher.It is single to be filled using the heat pump drying of open type or closed cycle It sets, is extremely difficult to ideal drying effect.
Chinese invention patent 201710397924.3 discloses a kind of enclosed hydrofuge and the hot air combined heat pump used of open type Tobacco leaf drying room still remains using a large amount of air-valves and switches air duct to realize open type or closed cycle, and air duct is complicated, causes to fill It is many and diverse to set structure, shape is heavy.Chinese utility model patent 201720735728.8 discloses a kind of Open-closed-loop heat pump dryer Group flows to realize open type or closed cycle, system noenergy recyclable device, moisture removal using electromagnetism Vavle switching refrigeration system It is low.Chinese invention patent 201810116543.8 discloses a kind of open type air and can dehumidify with enclosed difunctional air source heat pump Dryer, heat reclaim unit use air heat regenerator, and it is complicated, bulky to still remain air duct.The most key be with When using open circulation heating, do not solve frequent defrost, defrost existing for traditional open circulation causes to dry upper three patents The problem of heat that stove room temperature is greatly reduced and the later stage of drying system is extra can not discharge.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of composition open and close formula circulating heat pump drying system, working efficiencies It is high, structure is simple, small in size, work is more stable, have the function of open type and two kinds of enclosed, system heating rate fastly, defrost It still dehumidifies in journey.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of composition open and close formula circulating heat pump drying system is designed, including baking room, heat pump drying subsystem and drying air follow Loop subsystems;
The heat pump drying subsystem includes compressor, main condenser, indoor evaporator, outdoor heat exchanger, liquid storage device, dried Filter and gas-liquid separator;The outdoor heat exchanger includes outdoor fan, outdoor evaporator and outdoor condenser;The compressor Exhaust outlet be connected respectively with the import of the main condenser and the import of outdoor condenser, the outlet of the main condenser and The outlet of outdoor condenser is connected with the import of the liquid storage device respectively;The outlet of the liquid storage device and device for drying and filtering into Mouth is mutually connected, and the outlet of the device for drying and filtering passes sequentially through the first expansion valve and the first solenoid valve is connected to the indoor steaming Send out the import of device;The outlet of the device for drying and filtering passes sequentially through the first expansion valve and second solenoid valve is connected to the indoor steaming Send out the import of device;The outlet of the indoor evaporator is connected with the import of the gas-liquid separator, the outdoor evaporator Outlet is connected to the import of the gas-liquid separator by check valve;The outlet and the suction of the compressor of the gas-liquid separator Port is connected;
The drying air circulation subsystem includes air outlet, the return air inlet being connected with the baking room by air duct, described The position of the correspondence return air inlet is arranged in main condenser, and breeze fan is equipped at the air outlet;The indoor evaporator Including heat exchange of heat pipe evaporator section and heat exchange of heat pipe condensation segment, the return air inlet includes bypassing air duct and dehumidifying air duct, described The position in the correspondence dehumidifying air duct is arranged in heat exchange of heat pipe evaporator section, and the dehumidifying air duct is by baking room successively through superheater tube Heat exchanger evaporator section, heat exchange of heat pipe condensation segment are connected to the main condenser position;The bypass air duct is by baking room It is connected to the main condenser position.
Preferably, first solenoid valve and second solenoid valve, the outlet of first expansion valve are substituted using triple valve It is connected with the import of triple valve;The first outlet of the triple valve is connected with the import of indoor evaporator;The triple valve Second outlet be connected with the import of outdoor evaporator.
Preferably, the heat pump drying subsystem further includes economizer, and the outlet of the device for drying and filtering passes through the second electricity Magnet valve is connected to the first import of the economizer;Pass through third electricity between the second solenoid valve and the second import of economizer Magnet valve is connected with third expansion valve;The first outlet of the economizer passes through the import phase of the second expansion valve and outdoor evaporator Connection;The second outlet of the economizer is connected with the puff prot of compressor;The outlet of the device for drying and filtering passes sequentially through First solenoid valve and the first expansion valve are connected to the import of the indoor evaporator.
Preferably, the heat pump drying subsystem further includes economizer, and connection type is different: the device for drying and filtering Outlet is directly connected to the first import of the economizer, and the outlet of the device for drying and filtering also passes through third solenoid valve and third Expansion valve is connected with the second import of economizer;The first outlet of the economizer passes through second solenoid valve and the second expansion valve It is connected with the import of outdoor evaporator;The first outlet of the economizer also passes through the first solenoid valve and the connection of the first expansion valve To the import of the indoor evaporator;The second outlet of the economizer is connected with the puff prot of compressor.
It preferably, further include control subsystem, the control subsystem includes the return air being arranged in the dehumidifying air duct The environment temperature sensor of outdoor heat exchanger position, and setting is arranged in temperature sensor, return air humidity sensor Electric heater between the main condenser and breeze fan.
Preferably, the heat exchanger tube arranged crosswise of the outdoor evaporator and outdoor condenser, shares heat exchange fin.
Preferably, it is respectively equipped between the compressor and main condenser, between the outdoor condenser and liquid storage device Check valve;The 4th solenoid valve is additionally provided between the compressor and outdoor condenser.
Preferably, the breeze fan, outdoor fan are axial flow blower or centrifugal blower.
Preferably, the compressor is scroll compressor or rotor-type compressor.
Preferably, first expansion valve, the second expansion valve, third expansion valve are heating power expansion valve or electric expansion valve.
Preferably, the economizer is plate heat exchanger or flash evaporation.
The beneficial effects of the present invention are:
1. the present invention uses open and close type combination, the phase makes material be rapidly heated using open circulation before it is dried, reaches setting Closed cycle is switched to after temperature, effect on moisture extraction is good, circulation air closed circulation, and material is not contaminated.Phase benefit after the drying The extra heat of system is discharged with outdoor condenser, keeps baking room temperature constant.
2. the present invention creatively combines outdoor evaporator and outdoor condenser, the two heat exchanger tube arranged crosswise is shared Heat exchange fin when the stage of being rapidly heated reaches defrost condition at low ambient temperatures, is removed using the heat of outdoor condenser The frost layer of outdoor evaporator, baking room inner circulating air is still dehumidifying during defrosting, and baking room temperature fluctuation is small, real Energy is showed all of thoroughly solving during traditional open circulation defrosting that defrost is not thorough, baking room temperature substantially drops Low problem.
Detailed description of the invention
Fig. 1 is the structure principle chart of the heat pump drying subsystem in the embodiment of the present invention 1;
Fig. 2 is the overall structure schematic diagram of composition open and close formula circulating heat pump drying system in the embodiment of the present invention 1;
Fig. 3 is the structure principle chart of the heat pump drying subsystem in the embodiment of the present invention 2;
Fig. 4 is the overall structure schematic diagram of composition open and close formula circulating heat pump drying system in the embodiment of the present invention 2;
Fig. 5 is the structure principle chart of the heat pump drying subsystem in the embodiment of the present invention 3;
Fig. 6 is the overall structure schematic diagram of composition open and close formula circulating heat pump drying system in the embodiment of the present invention 3;
Fig. 7 is the structure principle chart of the heat pump drying subsystem in the embodiment of the present invention 4;
Fig. 8 is the overall structure schematic diagram of composition open and close formula circulating heat pump drying system in the embodiment of the present invention 4;
Figure label: 1 compressor, 2 main condensers, 21 breeze fans, 3 indoor evaporators, 4 outdoor heat exchangers, 41 outdoor fans, Condenser outside 42 outdoor evaporators, Room 43,5 liquid storage devices, 6 devices for drying and filtering;71 first solenoid valves, 72 second solenoid valves, 73 Three solenoid valves, 74 the 4th solenoid valves, 81 first expansion valves, 82 second expansion valves, 83 third expansion valves, 9 economizers, 10 threeways Valve, the first outlet of a triple valve, the second outlet of b triple valve;11 gas-liquid separators, 12 check valves, 13 electric heaters, 14 times Air temperature sensor, 15 return air humidity sensors, 16 environment temperature sensors, 100 be baking room, 101 air outlets, 102 return air Mouthful, 103 bypass air ducts, 104 dehumidifying air ducts, 111 heat exchange of heat pipe condensation segments, 112 heat exchange of heat pipe evaporator sections.
Wherein, the arrow in Fig. 1,3,5,7 show the loop direction of refrigerant;Arrow in Fig. 2,4,6,8 in baking room Head show the loop direction of drying air.
Specific embodiment
Illustrate a specific embodiment of the invention below with reference to embodiment, but following embodiment is used only to be described in detail The present invention does not limit the scope of the invention in any way.Related equipment component is as without especially in the examples below Illustrate, is conventional equipment element.
Embodiment 1: as shown in Figure 1, 2, a kind of composition open and close formula circulating heat pump drying system, including baking room 100, heat pump Dry subsystem, drying air circulation subsystem and control subsystem.
Heat pump drying subsystem include compressor 1, main condenser 2, indoor evaporator 3, outdoor heat exchanger 4, liquid storage device 5, Device for drying and filtering 6, gas-liquid separator 11 and economizer 9;Outdoor heat exchanger 4 includes outdoor fan 41, outdoor evaporator 42 and room External condenser 43;The exhaust outlet of compressor 1 is connected with the import of main condenser 2 and the import of outdoor condenser 43 respectively, main The outlet of condenser 2 and the outlet of outdoor condenser 43 are connected with the import of liquid storage device 5 respectively;The outlet of liquid storage device 5 and dry The import of dry filter 6 is mutually connected, and the outlet of device for drying and filtering 6 passes sequentially through the first expansion valve 81 and the first solenoid valve 71 connects Pass to the import of indoor evaporator 3;The outlet of device for drying and filtering 6 passes sequentially through the first expansion valve 81 and is connected to second solenoid valve 72 To the import of indoor evaporator 3;The outlet of indoor evaporator 3 is connected with the import of gas-liquid separator 11, outdoor evaporator 42 Outlet the import of gas-liquid separator 11 is connected to by check valve 12;The outlet of gas-liquid separator 11 and the air-breathing of compressor 1 Mouth is connected.
The outlet of device for drying and filtering 6 is connected to the first import 91 of economizer by second solenoid valve 72;Second solenoid valve It is connected between 72 and the second import 93 of economizer by third solenoid valve 73 and third expansion valve 83;The first of economizer goes out Mouth 92 is connected by the second expansion valve 82 with the import of outdoor evaporator 42;The second outlet 94 of economizer and compressor 1 Puff prot is connected;The outlet of device for drying and filtering 6 passes sequentially through the first solenoid valve 71 and the first expansion valve 81 is connected to indoor steaming Send out the import of device 3.
Drying air circulation subsystem includes air outlet 101, the return air inlet 102 being connected with baking room 100 by air duct, The position of corresponding return air inlet 102 is arranged in main condenser 2, and breeze fan 21 is equipped at air outlet 101;Indoor evaporator 3 is wrapped Heat exchange of heat pipe evaporator section 112 and heat exchange of heat pipe condensation segment 111 are included, return air inlet 102 includes bypass air duct 103 and dehumidifying air duct 104, heat exchange of heat pipe evaporator section 112 is arranged in the position in corresponding dehumidifying air duct 104, air duct 104 of dehumidifying by baking room 100 successively 2 position of main condenser is connected to by heat exchange of heat pipe evaporator section 112, heat exchange of heat pipe condensation segment 111;Bypass air duct 103 are connected to 2 position of main condenser by baking room 100.
Control subsystem include be arranged in dehumidifying air duct in return air temperature sensor 14, return air humidity sensor 15, if Set the environment temperature sensor 16 in 4 position of outdoor heat exchanger, and setting main condenser 2 and breeze fan 21 it Between electric heater 13.
Check valve is respectively equipped between compressor 1 and main condenser 2, between outdoor condenser 43 and liquid storage device 5;It is pressing The 4th solenoid valve 74 is additionally provided between contracting machine 1 and outdoor condenser 43.
Wherein, the heat exchanger tube arranged crosswise of outdoor evaporator 42 and outdoor condenser 43, shares heat exchange fin.Breeze fan 21, outdoor fan 41 is axial flow blower or centrifugal blower;Compressor 1 is scroll compressor or rotor-type compressor.First is swollen Swollen valve 81, the second expansion valve 82, third expansion valve 83 are heating power expansion valve or electric expansion valve.Economizer 9 is plate heat exchanger Or flash evaporation.
The heat exchanger tube arranged crosswise of outdoor evaporator 42 and outdoor condenser 43, outdoor evaporator 42 and outdoor condenser 43 It can work independently, can also be worked at the same time when needing defrost, the waste heat of system is made full use of to carry out defrost.
Composition open and close formula circulating heat pump drying system of the present invention, optimum organization and intelligent optimization by Analysis of Heat Pump Drying System Control is, it can be achieved that multiple-working mode: heating mode, defrosting mode, dehumidification mode, heat extraction mode.When equipment operation, control System judges automatically operational mode according to the environment temperature that booting detects: heating mode is run in the initial stage, to make to dry Temperature quickly increases in stove room;It is switched to dehumidification mode after reaching set temperature, it is sharp while maintaining baking room internal temperature It is dehumidified with evaporator, condensate moisture device is simultaneously discharged;It needs to automatically switch to defrosting mode when defrost in temperature-rise period, remove Frost still keeps dehumidifying simultaneously;And humidity excessive in later period system thermal automatically switches to heat extraction mould when also not reaching setting value Formula.
The workflow of the multiple-working mode of composition open and close formula circulating heat pump drying system in embodiment 1 is as follows:
(1) heating mode:
First solenoid valve 71 close, second solenoid valve 72 open, third solenoid valve 73 according to according to control require open or close, 4th solenoid valve 74 is closed;Circulating fan 21 is opened, outdoor fan 41 is opened;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged enters main condenser 2, Release heat is condensed into the liquid refrigerant of supercooling or saturation, then successively passes through liquid storage device 5, device for drying and filtering 6, second solenoid valve It is divided into two-way after 72, bypass refrigerant enters third expansion valve 83 by third solenoid valve 73, throttles by third expansion valve 83 The gas-liquid two-phase cold-producing medium for becoming middle pressure medium temperature afterwards, into economizer 9 and main road refrigerant heat exchanger after enter compressor puff prot, After main road refrigerant cools down in economizer 9, the gas-liquid two-phase for becoming low-temp low-pressure through 82 reducing pressure by regulating flow of the second expansion valve freezes Agent absorbs outdoor environment atmospheric heat into outdoor evaporator 42, and evaporation becomes the superheated refrigerant steam of low pressure, then through gas The air entry that compressor 1 is returned to after the progress gas-liquid separation of liquid/gas separator 11, becomes the gas of high temperature and pressure after the compression of compressor 1 State refrigerant starts next circulation.
(2) defrost pattern:
First solenoid valve 71 is opened, second solenoid valve 72 is closed, third solenoid valve 73 is closed, the 4th solenoid valve 74 is opened;Circulation Blower 21 is opened, outdoor fan 41 is closed;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged is divided into two parts: one Divide and enter main condenser 2, release heat is condensed into the liquid refrigerant of supercooling or saturation;Another part passes through the 4th solenoid valve 74 Laggard external condenser 43 of entering the room heats outdoor evaporator 42 and carries out the liquid refrigerant for being condensed into supercooling or saturation while defrost, Two parts refrigerant successively passes through liquid storage device 5, device for drying and filtering 6, the first solenoid valve 71, the first expansion valve 81, warp again after converging The gas-liquid two-phase cold-producing medium for becoming low-temp low-pressure after the throttling of first expansion valve 81, entering the room evaporator 3 reduces circulation air Temperature removes the moisture in circulation air simultaneously, and evaporation becomes the superheated refrigerant steam of low pressure, then through gas-liquid separator 11 The air entry that compressor 1 is returned to after progress gas-liquid separation becomes the gaseous refrigerant of high temperature and pressure after the compression of compressor 1, Start next circulation.
(3) dehumidification mode:
First solenoid valve 71 is opened, second solenoid valve 72 is closed, third solenoid valve 73 is closed, the 4th solenoid valve 74 is closed;Circulation Blower 21 is opened, outdoor fan 41 is closed;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged enters main condenser 2, Release heat is condensed into the liquid refrigerant of supercooling or saturation;Successively pass through liquid storage device 5, device for drying and filtering 6, the first solenoid valve again 71, the first expansion valve 81 becomes the gas-liquid two-phase cold-producing medium of low-temp low-pressure after the throttling of the first expansion valve 81, enters the room evaporation The temperature that device 3 reduces circulation air removes the moisture in circulation air simultaneously, and evaporation becomes the superheated refrigerant steam of low pressure, so By the air entry for returning to compressor 1 after the progress gas-liquid separation of gas-liquid separator 11, become high temperature height after the compression of compressor 1 The gaseous refrigerant of pressure starts next circulation.
(4) heat extraction mode:
First solenoid valve 71 is opened, second solenoid valve 72 is closed, third solenoid valve 73 is closed, the 4th solenoid valve 74 is opened;Circulation Blower 21 is opened, outdoor fan 41 is opened;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged is divided into two parts: one Divide and enter main condenser 2, release heat is condensed into the liquid refrigerant of supercooling or saturation;Another part passes through the 4th solenoid valve 74 Laggard external condenser 43 of entering the room radiates under the positive action of outdoor fan 41, and the extra heat of discharge system is made simultaneously Cryogen is condensed into the liquid refrigerant of supercooling or saturation, and two parts refrigerant successively passes through liquid storage device 5, dry filter after converging again Device 6, the first solenoid valve 71, the first expansion valve 81 become the gas-liquid two-phase refrigeration of low-temp low-pressure after the throttling of the first expansion valve 81 Agent, entering the room evaporator 3 reduces the temperature of circulation air while removing the moisture in circulation air, and evaporation becomes the mistake of low pressure Then warm refrigerant steam returns to the air entry of compressor 1, by compressor 1 after gas-liquid separator 11 carries out gas-liquid separation The gaseous refrigerant for becoming high temperature and pressure after compression, starts next circulation.
The workflow of drying air circulation subsystem in embodiment 1 are as follows: the air of the low temperature and high relative humidity between material drying Under the action of circulating fan 21, entered after heat pump drying system by return air inlet 102 and be divided into two parts, portion of air is by removing Wet wind road 104 enters, successively by the pre-cooling of heat exchange of heat pipe evaporator section 112,3 cool-down dehumidification of indoor evaporator, heat exchange of heat pipe Condensation segment 111 mixes after preheating with air of the another part after bypassing air duct 103, through sending after heating using main condenser Wind blower 21, the feeding baking room 100 of air outlet 101, the dry air of heating heating, drying material in baking room 100, simultaneously The moisture in material is taken away, after temperature sensor 14, the humidity sensor 15 being arranged in return air inlet 102 detect, under starting One circulation.
Embodiment 2: a kind of composition open and close formula circulating heat pump drying system, as shown in Figure 3,4, including baking room 100, heat pump Dry subsystem, drying air circulation subsystem and control subsystem.
Heat pump drying subsystem include compressor 1, main condenser 2, indoor evaporator 3, outdoor heat exchanger 4, liquid storage device 5, Device for drying and filtering 6 and gas-liquid separator 11;Outdoor heat exchanger 4 includes outdoor fan 41, outdoor evaporator 42 and outdoor condenser 43;The exhaust outlet of compressor 1 is connected with the import of main condenser 2 and the import of outdoor condenser 43 respectively, main condenser 2 Outlet and the outlet of outdoor condenser 43 are connected with the import of liquid storage device 5 respectively;The outlet of liquid storage device 5 and device for drying and filtering 6 Import be mutually connected, the outlet of device for drying and filtering 6 passes sequentially through the first expansion valve 81 and the first solenoid valve 71 is connected to interior The import of evaporator 3;The outlet of device for drying and filtering 6 passes sequentially through the first expansion valve 81 and second solenoid valve 72 is connected to indoor steaming Send out the import of device 3;The outlet of indoor evaporator 3 is connected with the import of gas-liquid separator 11, and the outlet of outdoor evaporator 42 is logical Cross the import that check valve 12 is connected to gas-liquid separator 11;The outlet of gas-liquid separator 11 is connected with the air entry of compressor 1.
It is same as Example 1 to dry air circulation subsystem, control subsystem.
The workflow of the multiple-working mode of composition open and close formula circulating heat pump drying system in embodiment 2 is as follows:
(1) heating mode:
First solenoid valve 71 is closed, second solenoid valve 72 is opened, the 4th solenoid valve 74 is closed;The unlatching of circulating fan 21, outdoor wind Machine 41 is opened;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged enters main condenser 2, Release heat is condensed into the liquid refrigerant of supercooling or saturation, then successively swollen into second by liquid storage device 5, device for drying and filtering 6 Swollen valve 82 becomes the gas-liquid two-phase cold-producing medium of low-pressure low-temperature after the throttling of the second expansion valve 82, by second solenoid valve 72 into Enter outdoor evaporator 42 and absorb outdoor environment atmospheric heat, evaporation becomes the superheated refrigerant steam of low pressure, then through gas-liquid point From the air entry for returning to compressor 1 after the progress gas-liquid separation of device 11, become the gaseous state system of high temperature and pressure after the compression of compressor 1 Cryogen starts next circulation.
(2) defrost pattern:
First solenoid valve 71 is opened, second solenoid valve 72 is closed, the 4th solenoid valve 74 is opened;The unlatching of circulating fan 21, outdoor wind Machine 41 is closed;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged is divided into two parts: one Divide and enter main condenser 2, release heat is condensed into the liquid refrigerant of supercooling or saturation;Another part passes through the 4th solenoid valve 74 Laggard external condenser 43 of entering the room heats outdoor evaporator 42 and carries out the liquid refrigerant for being condensed into supercooling or saturation while defrost, Two parts refrigerant successively passes through liquid storage device 5, device for drying and filtering 6, the first expansion valve 81 after converging again, through 81 section of the first expansion valve The gas-liquid two-phase cold-producing medium for becoming low-temp low-pressure after stream enters the room the evaporation of 3 refrigerant of evaporator by the first solenoid valve 71 and inhales It receives the temperature of circulation air while removing the moisture in circulation air, evaporation becomes the superheated refrigerant steam of low pressure, then passes through The air entry that compressor 1 is returned to after the progress gas-liquid separation of gas-liquid separator 11, becomes high temperature and pressure after the compression of compressor 1 Gaseous refrigerant starts next circulation.
(3) dehumidification mode:
First solenoid valve 71 is opened, second solenoid valve 72 is closed, the 4th solenoid valve 74 is closed;The unlatching of circulating fan 21, outdoor wind Machine 41 is closed;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged enters main condenser 2, Release heat is condensed into the liquid refrigerant of supercooling or saturation;Successively pass through liquid storage device 5, device for drying and filtering 6, the first expansion valve again 81, become the gas-liquid two-phase cold-producing medium of low-temp low-pressure after the throttling of the first expansion valve 81, is entered the room by the first solenoid valve 71 The temperature that evaporator 3 reduces circulation air removes the moisture in circulation air simultaneously, and the superheated refrigerant that evaporation becomes low pressure is steamed Then vapour returns to the air entry of compressor 1 after gas-liquid separator 11 carries out gas-liquid separation, become after the compression of compressor 1 The gaseous refrigerant of high temperature and pressure starts next circulation.
(4) heat extraction mode:
First solenoid valve 71 is opened, second solenoid valve 72 is closed, the 4th solenoid valve 74 is opened;The unlatching of circulating fan 21, outdoor wind Machine 41 is opened;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged is divided into two parts: one Divide and enter main condenser 2, release heat is condensed into the liquid refrigerant of supercooling or saturation;Another part passes through the 4th solenoid valve 74 Laggard external condenser 43 of entering the room radiates under the positive action of outdoor fan 41, and the extra heat of discharge system is made simultaneously Cryogen is condensed into the liquid refrigerant of supercooling or saturation, and two parts refrigerant successively passes through liquid storage device 5, dry filter after converging again Device 6, the first expansion valve 81 become the gas-liquid two-phase cold-producing medium of low-temp low-pressure after the throttling of the first expansion valve 81, by the first electricity Magnet valve 71 enters the room evaporator 3 and reduces the temperature of circulation air while removing the moisture in circulation air, and evaporation becomes low pressure Superheated refrigerant steam, then the air entry of compressor 1 is returned to after gas-liquid separator 11 carries out gas-liquid separation, through overcompression Machine 1 becomes the gaseous refrigerant of high temperature and pressure after compressing, start next circulation.
Embodiment 3: a kind of composition open and close formula circulating heat pump drying system, as shown in Figure 5,6, including baking room 100, heat pump Dry subsystem, drying air circulation subsystem and control subsystem.
Using the first solenoid valve 71 and second solenoid valve in 10 alternate embodiment 2 of triple valve in heat pump drying subsystem 72, the outlet of the first expansion valve 81 is connected with the import of triple valve 10;The first outlet a and indoor evaporator 3 of triple valve 10 Import be connected;The second outlet b of triple valve 10 is connected with the import of outdoor evaporator 42.Its in heat pump drying subsystem His structure of part is same as Example 2.
It is same as Example 1 to dry air circulation subsystem, control subsystem.
The workflow of the multiple-working mode of composition open and close formula circulating heat pump drying system in embodiment 3 is as follows:
(1) heating mode:
The first outlet a of triple valve is closed, the second outlet b of triple valve is opened, the 4th solenoid valve 74 is closed;Circulating fan 21 is opened It opens, outdoor fan 41 is opened;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged enters main condenser 2, Release heat is condensed into the liquid refrigerant of supercooling or saturation, then successively swollen into second by liquid storage device 5, device for drying and filtering 6 Swollen valve 82 becomes the gas-liquid two-phase cold-producing medium of low-pressure low-temperature after the throttling of the second expansion valve 82, and second through triple valve 10 goes out Mouth b enters outdoor evaporator 42 and absorbs outdoor environment atmospheric heat, and evaporation becomes the superheated refrigerant steam of low pressure, then through gas The air entry that compressor 1 is returned to after the progress gas-liquid separation of liquid/gas separator 11, becomes the gas of high temperature and pressure after the compression of compressor 1 State refrigerant starts next circulation.
(2) defrost pattern:
The first outlet a of triple valve is opened, the second outlet b of triple valve is closed, the 4th solenoid valve 74 is opened;Circulating fan 21 is opened It opens, outdoor fan 41 is closed;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged is divided into two parts: one Divide and enter main condenser 2, release heat is condensed into the liquid refrigerant of supercooling or saturation;Another part passes through the 4th solenoid valve 74 Laggard external condenser 43 of entering the room heats outdoor evaporator 42 and carries out the liquid refrigerant for being condensed into supercooling or saturation while defrost, Two parts refrigerant successively passes through liquid storage device 5, device for drying and filtering 6, the first expansion valve 81 after converging again, through 81 section of the first expansion valve The gas-liquid two-phase cold-producing medium for becoming low-temp low-pressure after stream, the first outlet a through triple valve 10 enter the room the steaming of 3 refrigerant of evaporator It sends out the temperature of absorption cycle air while removing the moisture in circulation air, evaporation becomes the superheated refrigerant steam of low pressure, so By the air entry for returning to compressor 1 after the progress gas-liquid separation of gas-liquid separator 11, become high temperature height after the compression of compressor 1 The gaseous refrigerant of pressure starts next circulation.
(3) dehumidification mode:
The first outlet a of triple valve is opened, the second outlet b of triple valve is closed, the 4th solenoid valve 74 is closed;Circulating fan 21 is opened It opens, outdoor fan 41 is closed;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged enters main condenser 2, Release heat is condensed into the liquid refrigerant of supercooling or saturation;Successively pass through liquid storage device 5, device for drying and filtering 6, the first expansion valve again 81, become the gas-liquid two-phase cold-producing medium of low-temp low-pressure after the throttling of the first expansion valve 81, the first outlet a through triple valve 10 enters The temperature that indoor evaporator 3 reduces circulation air removes the moisture in circulation air simultaneously, and evaporation becomes the superheat refrigeration of low pressure Then agent steam returns to the air entry of compressor 1 after gas-liquid separator 11 carries out gas-liquid separation, after the compression of compressor 1 As the gaseous refrigerant of high temperature and pressure, start next circulation.
(4) heat extraction mode:
The first outlet a of triple valve is opened, the second outlet b of triple valve is closed, the 4th solenoid valve 74 is opened;Circulating fan 21 is opened It opens, outdoor fan 41 is opened;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged is divided into two parts: one Divide and enter main condenser 2, release heat is condensed into the liquid refrigerant of supercooling or saturation;Another part passes through the 4th solenoid valve 74 Laggard external condenser 43 of entering the room radiates under the positive action of outdoor fan 41, and the extra heat of discharge system is made simultaneously Cryogen is condensed into the liquid refrigerant of supercooling or saturation, and two parts refrigerant successively passes through liquid storage device 5, dry filter after converging again Device 6, the first expansion valve 81 become the gas-liquid two-phase cold-producing medium of low-temp low-pressure, through triple valve 10 after the throttling of the first expansion valve 81 First outlet a enter the room evaporator 3 reduce circulation air temperature and meanwhile remove the moisture in circulation air, evaporation becomes Then the superheated refrigerant steam of low pressure returns to the air entry of compressor 1 after gas-liquid separator 11 carries out gas-liquid separation, passes through Compressor 1 becomes the gaseous refrigerant of high temperature and pressure after compressing, start next circulation.
Embodiment 4: a kind of composition open and close formula circulating heat pump drying system, as shown in Figure 7,8, including baking room 100, heat pump Dry subsystem, drying air circulation subsystem and control subsystem.
Heat pump drying subsystem include compressor 1, main condenser 2, indoor evaporator 3, outdoor heat exchanger 4, liquid storage device 5, Device for drying and filtering 6, gas-liquid separator 11 and economizer 9;Wherein, the connection type from embodiment 1 of economizer 9 is different, difference Be in: the outlet of device for drying and filtering 6 is directly connected to the first import 91 of economizer, and the outlet of device for drying and filtering 6 also passes through Third solenoid valve 73 and third expansion valve 83 are connected with the second import 93 of economizer;The first outlet 92 of economizer passes through the Two solenoid valves 72 and the second expansion valve 82 are connected with the import of outdoor evaporator 42;The first outlet 92 of economizer is also by the One solenoid valve 71 and the first expansion valve 81 are connected to the import of indoor evaporator 3;The second outlet 94 of economizer and compressor 1 Puff prot is connected.The structure of other parts is same as Example 1 in heat pump drying subsystem.
It is same as Example 1 to dry air circulation subsystem, control subsystem.
The workflow of the multiple-working mode of composition open and close formula circulating heat pump drying system in embodiment 4 is as follows:
(1) heating mode:
First solenoid valve 71 close, second solenoid valve 72 open, third solenoid valve 73 according to control require open or close, the 4th Solenoid valve 74 is closed;Circulating fan 21 is opened, outdoor fan 41 is opened;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged enters main condenser 2, Release heat is condensed into the liquid refrigerant of supercooling or saturation, then is successively divided into two-way after liquid storage device 5, device for drying and filtering 6, Bypass refrigerant enters third expansion valve 83 by third solenoid valve 73, becomes middle pressure medium temperature after the throttling of third expansion valve 83 Gas-liquid two-phase cold-producing medium, into economizer 9 and main road refrigerant heat exchanger after enter 1 puff prot of compressor, main road refrigerant exists After cooling down in economizer 9, the gas-liquid two-phase for becoming low-temp low-pressure through second solenoid valve 72,82 reducing pressure by regulating flow of the second expansion valve freezes Agent absorbs outdoor environment atmospheric heat into outdoor evaporator 42, and evaporation becomes the superheated refrigerant steam of low pressure, then through gas The air entry that compressor 1 is returned to after the progress gas-liquid separation of liquid/gas separator 11, becomes the gas of high temperature and pressure after the compression of compressor 1 State refrigerant starts next circulation.
(2) defrost pattern:
First solenoid valve 71 open, second solenoid valve 72 close, third solenoid valve 73 according to control require open or close, the 4th Solenoid valve 74 is opened;Circulating fan 21 is opened, outdoor fan 41 is closed;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged is divided into two parts: one Divide and enter main condenser 2, release heat is condensed into the liquid refrigerant of supercooling or saturation;Another part passes through the 4th solenoid valve 74 Laggard external condenser 43 of entering the room heats outdoor evaporator 42 and carries out the liquid refrigerant for being condensed into supercooling or saturation while defrost, Two parts refrigerant is successively divided into two-way after liquid storage device 5, device for drying and filtering 6 again after converging, bypass refrigerant passes through third Solenoid valve 73 enters third expansion valve 83, becomes the gas-liquid two-phase cold-producing medium of middle pressure medium temperature after the throttling of third expansion valve 83, Enter 1 puff prot of compressor after into economizer 9 and main road refrigerant heat exchanger, after main road refrigerant cools down in economizer 9, warp First solenoid valve 71,81 reducing pressure by regulating flow of the first expansion valve become the gas-liquid two-phase cold-producing medium of low-temp low-pressure, enter the room evaporator 3 It reduces the temperature of circulation air while removing the moisture in circulation air, evaporation becomes the superheated refrigerant steam of low pressure, then The air entry that compressor 1 is returned to after gas-liquid separator 11 carries out gas-liquid separation becomes high temperature and pressure after the compression of compressor 1 Gaseous refrigerant, start next circulation.
(3) dehumidification mode:
First solenoid valve 71 open, second solenoid valve 72 close, third solenoid valve 73 according to control require open or close, the 4th Solenoid valve 74 is closed;Circulating fan 21 is opened, outdoor fan 41 is closed;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged enters main condenser 2, Release heat is condensed into the liquid refrigerant of supercooling or saturation, then is successively divided into two-way after liquid storage device 5, device for drying and filtering 6, Bypass refrigerant enters third expansion valve 83 by third solenoid valve 73, becomes middle pressure medium temperature after the throttling of third expansion valve 83 Gas-liquid two-phase cold-producing medium, into economizer 9 and main road refrigerant heat exchanger after enter 1 puff prot of compressor, main road refrigerant exists After cooling down in economizer 9, the gas-liquid two-phase for becoming low-temp low-pressure through the first solenoid valve 71,81 reducing pressure by regulating flow of the first expansion valve freezes Agent, entering the room evaporator 3 reduces the temperature of circulation air while removing the moisture in circulation air, and evaporation becomes the mistake of low pressure Then warm refrigerant steam returns to the air entry of compressor 1, by compressor 1 after gas-liquid separator 11 carries out gas-liquid separation The gaseous refrigerant for becoming high temperature and pressure after compression, starts next circulation.
(4) heat extraction mode:
First solenoid valve 71 open, second solenoid valve 72 close, third solenoid valve 73 according to control require open or close, the 4th Solenoid valve 74 is opened;Circulating fan 21 is opened, outdoor fan 41 is opened;
The workflow of heat pump drying subsystem: the gaseous refrigerant for the high temperature and pressure that compressor 1 is discharged is divided into two parts: one Divide and enter main condenser 2, release heat is condensed into the liquid refrigerant of supercooling or saturation;Another part passes through the 4th solenoid valve 74 Laggard external condenser 43 of entering the room radiates under the positive action of outdoor fan 41, and the extra heat of discharge system is made simultaneously Cryogen is condensed into the liquid refrigerant of supercooling or saturation, and two parts refrigerant successively passes through liquid storage device 5, dry filter after converging again It is divided into two-way after device 6, bypass refrigerant enters third expansion valve 83 by third solenoid valve 73, throttles by third expansion valve 83 The gas-liquid two-phase cold-producing medium for becoming middle pressure medium temperature afterwards, into economizer 9 and main road refrigerant heat exchanger after enter 1 jet of compressor Mouthful, after main road refrigerant cools down in economizer 9, through the first solenoid valve 71, that 81 reducing pressure by regulating flow of the first expansion valve becomes low temperature is low The gas-liquid two-phase cold-producing medium of pressure, entering the room evaporator 3 reduces the temperature of circulation air while removing the moisture in circulation air, Evaporation becomes the superheated refrigerant steam of low pressure, and the suction of compressor 1 is then returned to after gas-liquid separator 11 carries out gas-liquid separation Port becomes the gaseous refrigerant of high temperature and pressure after the compression of compressor 1, starts next circulation.
The workflow of drying air circulation subsystem in embodiment 2-4 is same as Example 1.
The present invention is described in detail above in conjunction with embodiment, but person of ordinary skill in the field can manage Solution, without departing from the purpose of the present invention, can also change each design parameter in above-described embodiment, be formed Multiple specific embodiments are common variation range of the invention, are no longer described in detail one by one herein.

Claims (10)

1. a kind of composition open and close formula circulating heat pump drying system, which is characterized in that including baking room (100), heat pump drying subsystem System and drying air circulation subsystem;
The heat pump drying subsystem include compressor (1), main condenser (2), indoor evaporator (3), outdoor heat exchanger (4), Liquid storage device (5), device for drying and filtering (6) and gas-liquid separator (11);The outdoor heat exchanger (4) includes outdoor fan (41), room Outer evaporator (42) and outdoor condenser (43);The import with the main condenser (2) respectively of the exhaust outlet of the compressor (1) It is connected with the import of outdoor condenser (43), the outlet difference of the outlet of the main condenser (2) and outdoor condenser (43) It is connected with the import of the liquid storage device (5);The outlet of the liquid storage device (5) is mutually connected with the import of device for drying and filtering (6), The outlet of the device for drying and filtering (6) passes sequentially through the first expansion valve (81) and the first solenoid valve (71) is connected to the indoor steaming Send out the import of device (3);The outlet of the device for drying and filtering (6) passes sequentially through the first expansion valve (81) and second solenoid valve (72) even Pass to the import of the indoor evaporator (3);The outlet of the indoor evaporator (3) and the import of the gas-liquid separator (11) It is connected, the outlet of the outdoor evaporator (42) is connected to the import of the gas-liquid separator (11) by check valve (12); The outlet of the gas-liquid separator (11) is connected with the air entry of the compressor (1);
The drying air circulation subsystem includes the air outlet (101) being connected with the baking room (100) by air duct, returns Air port (102), the main condenser (2) are arranged in the position of the correspondence return air inlet (102), at the air outlet (101) Equipped with breeze fan (21);The indoor evaporator (3) includes heat exchange of heat pipe evaporator section (112) and heat exchange of heat pipe condensation segment (111), the return air inlet (102) includes bypass air duct (103) and dehumidifying air duct (104), the heat exchange of heat pipe evaporator section (112) it is arranged in the position of correspondence dehumidifying air duct (104), the dehumidifying air duct (104) is successively passed through by baking room (100) Heat exchange of heat pipe evaporator section (112), heat exchange of heat pipe condensation segment (111) are connected to the main condenser (2) position;It is described It bypasses air duct (103) and the main condenser (2) position is connected to by baking room (100).
2. composition open and close formula circulating heat pump drying system according to claim 1, which is characterized in that use triple valve (10) Substitute first solenoid valve (71) and second solenoid valve (72), outlet and triple valve (10) of first expansion valve (81) Import is connected;The first outlet (a) of the triple valve (10) is connected with the import of indoor evaporator (3);The triple valve (10) second outlet (b) is connected with the import of outdoor evaporator (42).
3. composition open and close formula circulating heat pump drying system according to claim 1, which is characterized in that heat pump drying System further includes economizer (9), and the outlet of the device for drying and filtering (6) is connected to the economizer by second solenoid valve (72) The first import (91);Pass through third solenoid valve (73) between the second solenoid valve (72) and the second import (93) of economizer It is connected with third expansion valve (83);The first outlet (92) of the economizer passes through the second expansion valve (82) and outdoor evaporator (42) import is connected;The second outlet (94) of the economizer is connected with the puff prot of compressor (1);It is described dried The outlet of filter (6) passes sequentially through the first solenoid valve (71) and the first expansion valve (81) is connected to the indoor evaporator (3) Import.
4. composition open and close formula circulating heat pump drying system according to claim 1, which is characterized in that heat pump drying System further includes economizer (9), and the outlet of the device for drying and filtering (6) and the first import (91) of the economizer directly connect Logical, the outlet of the device for drying and filtering (6) also passes through the second of third solenoid valve (73) and third expansion valve (83) and economizer Import (93) is connected;The first outlet (92) of the economizer passes through second solenoid valve (72) and the second expansion valve (82) and room The import of outer evaporator (42) is connected;The first outlet (92) of the economizer is also swollen by the first solenoid valve (71) and first Swollen valve (81) is connected to the import of the indoor evaporator (3);The second outlet (94) of the economizer and the spray of compressor (1) Port is connected.
5. composition open and close formula circulating heat pump drying system described in any one of -4 according to claim 1, which is characterized in that also wrap Control subsystem is included, the control subsystem includes the return air temperature sensor (14) being arranged in the dehumidifying air duct, return air Humidity sensor (15) is arranged the environment temperature sensor (16) in outdoor heat exchanger (4) position, and is arranged in institute State the electric heater (13) between main condenser (2) and breeze fan (21).
6. composition open and close formula circulating heat pump drying system described in any one of -4 according to claim 1, which is characterized in that described The heat exchanger tube arranged crosswise of outdoor evaporator (42) and outdoor condenser (43), shares heat exchange fin.
7. composition open and close formula circulating heat pump drying system described in any one of -4 according to claim 1, which is characterized in that in institute It states between compressor (1) and main condenser (2), be respectively equipped with check valve between the outdoor condenser (43) and liquid storage device (5); The 4th solenoid valve (74) is additionally provided between the compressor (1) and outdoor condenser (43).
8. composition open and close formula circulating heat pump drying system described in any one of -4 according to claim 1, which is characterized in that described Breeze fan (21), outdoor fan (41) are axial flow blower or centrifugal blower;The compressor (1) is scroll compressor or turns Minor compressor.
9. composition open and close formula circulating heat pump drying system according to claim 3 or 4, which is characterized in that described first is swollen Swollen valve (81), the second expansion valve (82), third expansion valve (83) are heating power expansion valve or electric expansion valve.
10. composition open and close formula circulating heat pump drying system according to claim 3 or 4, which is characterized in that the economizer It (9) is plate heat exchanger or flash evaporation.
CN201811442484.XA 2018-11-29 2018-11-29 A kind of composition open and close formula circulating heat pump drying system Pending CN109539762A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110345666A (en) * 2019-06-25 2019-10-18 广东奥伯特节能设备有限公司 For the control method of heat pump drying unit, system, device and storage medium
CN112460940A (en) * 2020-11-27 2021-03-09 丹阳市慧天新能源有限公司 Agricultural product heat pump drying system and control method
CN112985046A (en) * 2021-02-04 2021-06-18 鹤山市雪尔达冷冻设备有限公司 Heat pump drying device and lost foam drying method based on device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110345666A (en) * 2019-06-25 2019-10-18 广东奥伯特节能设备有限公司 For the control method of heat pump drying unit, system, device and storage medium
CN110345666B (en) * 2019-06-25 2021-07-20 广东奥伯特节能设备有限公司 Control method, system and device for heat pump drying unit and storage medium
CN112460940A (en) * 2020-11-27 2021-03-09 丹阳市慧天新能源有限公司 Agricultural product heat pump drying system and control method
CN112985046A (en) * 2021-02-04 2021-06-18 鹤山市雪尔达冷冻设备有限公司 Heat pump drying device and lost foam drying method based on device
CN112985046B (en) * 2021-02-04 2022-04-15 鹤山市雪尔达冷冻设备有限公司 Heat pump drying device and lost foam drying method based on device

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