WO2020073372A1 - 一种粮食烘干用热泵热风炉系统 - Google Patents

一种粮食烘干用热泵热风炉系统 Download PDF

Info

Publication number
WO2020073372A1
WO2020073372A1 PCT/CN2018/112620 CN2018112620W WO2020073372A1 WO 2020073372 A1 WO2020073372 A1 WO 2020073372A1 CN 2018112620 W CN2018112620 W CN 2018112620W WO 2020073372 A1 WO2020073372 A1 WO 2020073372A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat pump
pump unit
heat
blast stove
evaporator
Prior art date
Application number
PCT/CN2018/112620
Other languages
English (en)
French (fr)
Inventor
王天舒
王玉军
刘军
李�柱
王颖
Original Assignee
江苏天舒电器有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏天舒电器有限公司 filed Critical 江苏天舒电器有限公司
Publication of WO2020073372A1 publication Critical patent/WO2020073372A1/zh

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B9/00—Preservation of edible seeds, e.g. cereals
    • A23B9/08—Drying; Subsequent reconstitution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/06—Air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/06—Grains, e.g. cereals, wheat, rice, corn
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
    • Y02P60/85—Food storage or conservation, e.g. cooling or drying

Definitions

  • the invention relates to a heat pump hot blast stove system for grain drying.
  • the purpose of the present invention is to provide a heat pump hot blast stove system for grain drying.
  • the air outlet temperature has been kept in a stable state and has a better drying effect to solve the current problem.
  • Some heat pump hot air stoves have problems of uneven drying temperature and poor drying effect due to the decrease in the temperature of the air during defrosting.
  • the solution of the present invention is: a heat pump hot blast stove system for grain drying
  • the heat pump hot blast stove system includes a blower and a heat pump unit
  • the blower is provided at the air outlet of the heat pump unit
  • the fresh air is supplied by the The fresh air inlet of the heat pump unit enters the heat pump unit for heating.
  • the heated fresh air is sent by the blower to the drying tower for grain drying.
  • the heat pump hot air furnace system includes at least two heat pump units operating in parallel, respectively For the first-stage heat pump unit and the second-stage heat pump unit, the fresh air after heating by the second-stage heat pump unit enters the first-stage heat pump unit again for heating.
  • the first-stage heat pump unit and the second-stage heat pump unit both include an evaporator and a gas-liquid unit Separator, compressor, condenser and three-way valve;
  • the heat pump hot blast stove system further includes a heat collector and a hot water storage tank, the heat collector is located in the hot water storage tank, and the water outlet of the hot water storage tank is connected with the pipeline of the evaporator through a pipeline;
  • the inlet of the compressor is connected to the gas-liquid separator, the outlet of the compressor is connected to the inlet of the three-way valve, the first outlet of the three-way valve is connected to the condenser, and the second outlet of the three-way valve is connected to the heat collector Device
  • the outlet of the condenser is connected to the evaporator through a first solenoid valve, and the inlet of the heat collector is connected through a second solenoid valve, and the outlet of the heat collector is connected to the evaporator;
  • the secondary heat pump unit When the grain drying operation is running normally, the secondary heat pump unit is operating normally, the primary heat pump unit is supercooled and heat storage, the first solenoid valve of the primary heat pump unit is closed, the second electromagnetic valve is opened, after the condenser of the primary heat pump unit is out
  • the liquid refrigerant flows into the heat collector, and the heat of the refrigerant in the heat collector exchanges heat with the water in the hot water storage tank;
  • the primary heat pump unit and the secondary heat pump unit concentrate heat storage, the first solenoid valve and the second solenoid valve are closed, and the high-temperature and high-pressure gas refrigerant passing through the compressor directly enters the heat collector.
  • the heat of the refrigerant in the heat collector is exchanged with the water in the hot water storage tank.
  • the heat pump hot blast stove system is provided with three-stage heat pump units, which are a first-stage heat pump unit, a second-stage heat pump unit and a three-stage heat pump unit, the first-stage heat pump unit, second-stage heat pump unit and third-stage heat pump unit are juxtaposed During operation, the fresh air passes through the three-stage heat pump unit, the second-stage heat pump unit and the first-stage heat pump unit for heating step by step and then used for grain drying.
  • the secondary heat pump unit and the tertiary heat pump unit are normally dried.
  • the first-stage heat pump unit, the second-stage heat pump unit and the third-stage heat pump unit concentrate heat storage, and the heat in the external environment is quickly transferred to the hot water storage tank. Heat storage.
  • the heat pump hot blast stove system includes a water spray device, an inlet pipe of the water spray device is connected to a hot water storage tank, and the water spray port of the water spray device is aligned with the evaporator.
  • the water spraying device includes a water sprayer and a circulating water pump.
  • the water inlet of the circulating water pump is connected to the hot water storage tank through a pipeline, and the water outlet of the circulating water pump is connected to the water sprayer through the pipeline.
  • a defrosting solenoid valve is provided between the water outlet of the circulating water pump and the sprinkler.
  • the hot water in the hot water storage tank is evenly sprayed onto the evaporator through the water spray device, and the hot water is used to melt the frost.
  • the hot water in the hot water storage tank is evenly sprayed onto the evaporator through the water spraying device, which is used to increase the heat absorption capacity of the evaporator, so as to improve the output of the heat pump hot blast stove system. Wind temperature.
  • the invention transfers the excess heat in the refrigerant to the hot water storage tank, improves the energy utilization rate and reduces the power consumption.
  • the present invention uses hot water to melt frost, which satisfies the good effect during defrosting, and also ensures that the temperature of the air outlet during drying of the grain will not decrease.
  • the invention reuses the stored heat into the heating process of the normal heat pump hot air furnace, so that the function of reducing the system configuration of the heat pump hot air furnace can be achieved.
  • the invention adopts spraying hot water to melt the frost, which can not only achieve defrosting and improve the heat absorption effect of the evaporator, but also can clean the dust on the evaporator and ensure the heat exchange effect of the evaporator.
  • FIG. 1 is a structural schematic diagram of the heat pump hot blast stove system of the present invention
  • 1-1 No. 1 compressor, 2-1: No. 1 condenser, 3-1: No. 1 throttling device, 4-1: No. 1 evaporator, 5-1: No. 1 gas-liquid separator, 6- 1: 1 three-way valve, 7-1: 1 first solenoid valve, 8-1: 1 second solenoid valve, 9-1: 1 evaporator fan, 10-1: 1 sprinkler, 11 -1: No. 1 defrosting solenoid valve;
  • 1-2 No. 2 compressor, 2-2: No. 2 condenser, 3-2: No. 2 throttling device, 4-2: No. 2 evaporator, 5-2: No. 2 gas-liquid separator, 6- 2: No. 2 three-way valve, 7-2: No. 1 first solenoid valve, 8-2: No. 2 second solenoid valve, 9-2: No. 2 evaporative fan, 10-2: No. 2 sprinkler, 11 -2: No. 2 defrosting solenoid valve;
  • the heat pump hot blast stove system of the present invention includes a blower, a heat pump unit, a heat collector, and a hot water storage tank, wherein the blower is provided at the air outlet of the heat pump unit, and the fresh air enters the heat pump unit for heating from the fresh air inlet of the heat pump unit.
  • the hot fresh air is sent to the drying tower by the blower for grain drying.
  • the heat collector is set in the hot water storage tank, and the water outlet of the hot water storage tank is connected with the pipeline of the evaporator through the pipeline, the heat storage device stores heat to the heat collector, and the heat in the heat collector and the hot water storage The water in the tank exchanges heat, and the heated water enters the evaporator pipeline to increase the temperature of the evaporator and realize the heat storage and defrosting of the evaporator.
  • the heat pump unit of this embodiment includes a first-level heat pump unit, a second-level heat pump unit, and a third-level heat pump unit.
  • the fresh air after heating step by step is sent by the blower into the drying tower for grain drying.
  • the primary heat pump unit includes No. 1 compressor 1-1, No. 1 condenser 2-1, No. 1 throttling device 3-1, No. 1 evaporator 4-1, No. 1 gas-liquid separator 5-1 and No. 1 three-way valve 6-1.
  • the inlet of No. 1 compressor 1-1 is connected to No. 1 gas-liquid separator 2-1, the outlet of No. 1 compressor 1-1 is connected to the inlet C of No. 1 three-way valve 6-1, and the No. 1 three-way valve 6-1
  • the first outlet A is connected to the No. 1 condenser 2-1, and the second outlet B of the No. 1 three-way valve 6-1 is connected to the heat collector 12.
  • the outlet of the No. 1 condenser 2-1 passes through the No. 1 first solenoid valve 7 -1 is connected to the evaporator No. 1, and the inlet of the heat collector is connected through the second electromagnetic valve 8-1, and the outlet of the heat collector is connected to the evaporator 4-1.
  • Two-stage heat pump unit includes No. 2 compressor 1-2, No. 2 condenser 2-2, No. 2 throttling device 3-2, No. 2 evaporator 4-2, No. 2 gas-liquid separator 5-2 and No. 2 Three-way valve 6-2.
  • the inlet of No. 2 compressor 1-2 is connected to the No. 2 gas-liquid separator 2-2, the outlet of No. 2 compressor 1-2 is connected to the inlet C of No. 2 three-way valve 6-2, the No. 2 three-way valve 6-2
  • the first outlet A is connected to the No. 2 condenser 2-2, and the second outlet B of the No. 2 three-way valve 6-2 is connected to the heat collector 12.
  • the outlet of the No. 2 condenser 2-2 passes through the No. 2 first solenoid valve 7 -2 is connected to the evaporator No. 2, and the inlet of the heat collector is connected through the second solenoid valve 8-2, and the outlet of the heat collector is connected to the evaporator 2-2.
  • Three-stage heat pump unit includes No. 3 compressor 1-3, No. 3 condenser 2-3, No. 3 throttling device 3-3, No. 3 evaporator 4-3, No. 3 gas-liquid separator 5-3 and No. 3 Three-way valve 6-3.
  • the inlet of No. 3 compressor 1-3 is connected to No. 3 gas-liquid separator 2-3, the outlet of No. 3 compressor 1-3 is connected to the inlet C of No. 3 three-way valve 6-3, and the No. 3 three-way valve 6-3
  • the first outlet A is connected to the No. 3 condenser 2-3, and the second outlet B of the No. 3 three-way valve 6-3 is connected to the heat collector 12.
  • the outlet of the No. 3 condenser 2-3 passes through the No. 3 first solenoid valve 7 -3 is connected to the evaporator No. 3, and the inlet of the heat collector is connected through the second solenoid valve 8-3, and the outlet of the heat collector is connected to the evaporator 3-3.
  • the heat pump hot blast stove system of this embodiment further includes a water spraying device for defrosting.
  • the water spraying device sprays the evaporator to the evaporator. Spray water further to defrost.
  • spray technology not only can defrost and improve the heat absorption effect of the evaporator, but also can clean the dust on the evaporator to ensure the heat exchange effect of the evaporator.
  • the water spraying equipment includes the circulating water pump 14 and the No. 1 water spraying equipment, the No. 2 water spraying equipment and the No. 3 water spraying equipment.
  • the pipeline is connected to the spray pipes of No. 1 water spray equipment, No. 2 water spray equipment and No. 3 water spray equipment, among which:
  • No. 1 sprinkler equipment includes No. 1 sprinkler 10-1 and No. 1 defrosting solenoid valve 11-1.
  • No. 1 defrosting solenoid valve 11-1 is provided at the outlet of No. 1 sprinkler 10-1 and circulating water pump 14 On the pipeline between the water outlets, when No. 1 evaporator 4-1 needs to be defrosted, No. 1 defrosting solenoid valve 11-1 is opened, and circulating water pump 14 pumps the hot water in hot water storage tank 13 to No. 1 spray In the spray pipe of the water heater, spray hot water through the No. 1 sprinkler to the No. 1 evaporator for defrosting.
  • No. 2 sprinkler equipment includes No. 2 sprinkler 10-2 and No. 2 defrosting solenoid valve 11-2.
  • No. 2 defrosting solenoid valve 11-2 is provided at the outlet of No. 2 sprinkler 10-2 and circulating water pump 14 On the pipeline between the water outlets, when defrosting of No. 2 evaporator 4-2 is required, No. 2 defrosting solenoid valve 11-2 is opened, and circulating water pump 14 pumps the hot water in hot water storage tank 13 to No. 2 spray In the spray pipe of the water heater, spray hot water through the No. 2 sprinkler to the No. 1 evaporator for defrosting.
  • No. 3 sprinkler equipment includes No. 3 sprinkler 10-3 and No. 3 defrosting solenoid valve 11-3.
  • No. 3 defrosting solenoid valve 11-3 is provided at the outlet of No. 3 sprinkler 10-3 and circulating water pump 14 On the pipeline between the water ports, when defrosting of evaporator 3-3 needs to be defrosted, defrosting solenoid valve 11-3 is opened, and circulating water pump 14 pumps the hot water in hot water storage tank 13 to sprayer 3 In the spray pipe of the water heater, spray hot water through the No. 3 sprinkler to the No. 3 evaporator for defrosting.
  • No. 1 compressor No. 2 compressor, No. 3 compressor
  • No. 3 compressor sucks the low-temperature and low-pressure gas refrigerant, and after the compression work, it changes into a high-temperature and high-pressure gas state, and enters the No. 1 three-way valve (2 No. 3 three-way valve, No. 3 three-way valve), one way into the No. 1 condenser (No. 2 condenser, No. 3 condenser), the other way directly into the heat collector.
  • Fresh air heating process The fresh air is heated in multiple stages through No. 3 condenser, No. 2 condenser, and No. 1 condenser, and finally is sent into the drying tower by the blower for grain drying.
  • the heat storage mode of the heat pump hot blast stove system 1 Under normal operation of the drying operation, the first-stage heat pump unit superheats and stores heat. In this state, the two-stage heat pump unit and the three-stage heat pump unit operate normally, because the fresh air passes through the two-stage heating of the two-stage heat pump unit and the three-stage heat pump unit before reaching the first-stage heat pump unit. The first-stage heat pump unit heats the higher temperature Hot air, therefore, the liquid refrigerant still has a higher temperature after exiting the No. 1 condenser, and the power of the compressor is higher. In this state, the supercooling heat transfer technology is used to flow the liquid refrigerant after the No.
  • the heat storage mode of the heat pump hot blast stove system 2 When the grain is cooled and the grain is loaded and unloaded, the heat pump unit works to store heat. In this heat storage mode, the first-stage heat pump unit, second-stage heat pump unit and third-stage heat pump unit work simultaneously to concentrate heat storage.
  • the CB conduction of No. 1 three-way valve, No. 2 three-way valve and No. 3 three-way valve, 7 -1, 7-2, 7-3 and 8-1, 8-2, 8-3 are closed, the heat in the external environment is quickly transferred to the hot water storage tank, when the water temperature in the hot water storage tank reaches 55 degrees At that time, all of the primary heat pump unit, secondary heat pump unit and tertiary heat pump unit stopped working, and the heat storage ended.
  • Defrosting heat utilization mode when the inlet air temperature of No. 1 evaporator / No. 2 evaporator / No. 3 evaporator is lower than 10 degrees, the fin temperature is lower than that of No. 1 evaporator / No. 2 evaporator / No. 3 evaporator
  • the wind temperature is 10 degrees and continues to reach 5 minutes, open the No. 1 defrosting solenoid valve / No. 2 defrosting solenoid valve / No. 3 defrosting solenoid valve.
  • the No. 1 circulating water pump / No. 2 circulating water pump / No. 3 circulating water pump will The hot water in the hot water storage tank is pumped to the spray pipe of No. 1 sprinkler / 2 No. sprinkler / 3 No.
  • the water heater sprays the hot water in the hot water storage tank evenly onto No. 1 evaporator / No. 2 evaporator / No. 3 evaporator, and uses the hot water to defrost. Since the hot water defrosting process absorbs the heat of the hot water, the heating capacity of the heat pump unit will increase instead, and there will be no phenomenon that the temperature of the outgoing air during drying will decrease.
  • Non-frosting heat utilization mode When the heat pump unit is in operation and the inlet air temperature of No. 1 evaporator / No. 2 evaporator / No. 3 evaporator is higher than 10 degrees, and the water temperature of the hot water storage tank is higher than the ambient temperature, Open the No. 1 defrosting solenoid valve / No. 2 defrosting solenoid valve / No. 3 defrosting solenoid valve, and send the hot water in the hot water storage tank to No. 1 through No. 1 circulating water pump / No. 2 circulating water pump / No. 3 circulating water pump No. 2 sprinkler / No. 2 sprinkler / No. 3 sprinkler sprinkling line, through the No. 1 sprinkler / No.

Abstract

一种粮食烘干用热泵热风炉系统，包括送风机和热泵机组，热泵机组包括压缩机(1-1;1-2;1-3)、蒸发器(4-1;4-2;4-3)、气液分离器(5-1;5-2;5-3)和冷凝器(2-1;2-2;2-3)，热泵机组还包括三通阀(6-1;6-2;6-3)，热泵热风炉系统还包括集热器(12)；压缩机(1-1;1-2;1-3)的入口连接气液分离器(5-1;5-2;5-3)，压缩机(1-1;1-2;1-3)的出口连接三通阀(6-1;6-2;6-3)的进口，三通阀(6-1;6-2;6-3)的第一出口连接冷凝器(2-1;2-2;2-3)，三通阀(6-1;6-2;6-3)的第二出口连接集热器(12)；冷凝器(2-1;2-2;2-3)的出口通过第一电磁阀(7-1;7-2;7-3)连接蒸发器(4-1;4-2;4-3)，并通过第二电磁阀(8-1;8-2;8-3)连接集热器(12)的入口，集热器(12)的出口连接蒸发器(4-1;4-2;4-3)。该热泵热风炉在除霜时，出风温度一直保持在稳定的状态，具有较好的烘干效果，解决现有的热泵热风炉由于除霜时出风温度降低，导致粮食烘干温度不均匀，烘干效果差的问题。

Description

一种粮食烘干用热泵热风炉系统 技术领域
本发明涉及一种粮食烘干用热泵热风炉系统。
背景技术
近年来，我国粮食烘干机械设备行业获得快速的发展，但整体上还是处于市场比较混乱，产品技术落后，企业创新能力差、研发能力较弱，一次性购置成本偏高等阶段，亟需从政策法规、市场层面、技术层面等，推动烘干机行业持续健康和有序发展。现有的粮食烘干技术有自然风干，晒干、燃烧化学燃料烘干、电加热、红外，微波干燥等，这些技术能耗巨大，污染严重，效率低，安全差，显然，这些旧式的干燥设备不符合当今社会的可持续发展的趋势。寻找一种可替代旧式的干燥设备，且安全、环保、节能的干燥设备显得越发紧迫。
随着中国能源消耗的加剧，人均能源利用率已不能满足需求，国家政府对能源利用的宏观调控，热泵设备在节能减排上优势已日渐明显。与燃油,燃气锅炉相比,全年平均可节约能源约70％，加上电价的走低和燃料价格的上涨，运行费用低的优点日益突出；热泵产品无任何燃烧排放物，制冷剂选用环保制冷剂，对臭氧层零污染，是较好的环保型产品；设备全自动控制，无需人员蹲守，节省了人力成本。但是，现在市场上的热泵热风炉处于刚推广阶段，还有许多技术需要创新和突破。
目前市场上使用的热泵热风炉仍存在问题：系统冬季运行时，室外环境温度低，蒸发温度降低，蒸发器表面易结上厚厚的霜层，从而导致机组性能下降，甚至不能正常换热，机组出现故障停机，传统化霜方式需停机或逆向化霜，造成出风温度降低，出风不稳定，从而导致粮食烘干温度不均匀，有的时段，烘干效果差。
发明内容
本发明的目的是提供一种粮食烘干用热泵热风炉系统，本发明的热泵热风炉在除霜 时，出风温度一直保持在稳定的状态，具有较好的烘干效果，用以解决现有的热泵热风炉由于除霜时出风温度降低，导致粮食烘干温度不均匀，烘干效果差的问题。
为实现上述目的，本发明的方案是：一种粮食烘干用热泵热风炉系统，所述热泵热风炉系统包括送风机和热泵机组，所述送风机设置于热泵机组的出风口处，新风由所述热泵机组的新风入风口进入热泵机组进行制热，制热后的新风由所述送风机送至烘干塔用于粮食烘干，所述热泵热风炉系统包括至少两级并列运行的热泵机组，分别为一级热泵机组和二级热泵机组，经过二级热泵机组制热后的新风，再次进入一级热泵机组进行制热，所述一级热泵机组和二级热泵机组均包括蒸发器、气液分离器、压缩机、冷凝器和三通阀；
所述的热泵热风炉系统还包括集热器和储热水箱，所述集热器位于储热水箱中，储热水箱的出水口通过管路与蒸发器的管路连通；
所述压缩机的入口连接气液分离器，所述压缩机的出口连接三通阀的进口，所述三通阀的第一出口连接冷凝器，所述三通阀的第二出口连接集热器；
所述冷凝器的出口通过第一电磁阀连接蒸发器，并通过第二电磁阀连接集热器的入口，所述集热器的出口连接蒸发器；
当粮食烘干作业正常运行时，二级热泵机组正常运行，一级热泵机组过冷蓄热，一级热泵机组的第一电磁阀关闭，第二电磁阀打开，出一级热泵机组冷凝器后的液态制冷剂流入集热器，集热器中制冷剂的热量与储热水箱中的水进行热交换；
当粮食降温和装卸粮时，一级热泵机组和二级热泵机组集中蓄热，第一电磁阀和第二电磁阀都关闭，经过压缩机后的高温高压的气态制冷剂直接进入集热器，将集热器中制冷剂的热量与储热水箱中的水进行热交换。
进一步地，所述热泵热风炉系统设置有三级热泵机组，分别为一级热泵机组、二级热泵机组和三级热泵机组，所述一级热泵机组、二级热泵机组和三级热泵机组并列运行，新风分别经过三级热泵机组、二级热泵机组和一级热泵机组进行逐级制热后用于粮食烘干。
进一步地，在热泵热风炉系统正常烘干运行过程中，一级热泵机组过冷蓄热时，二级热泵机组和三级热泵机组正常烘干运行。
进一步地，粮食降温和装卸粮时，一级热泵机组、二级热泵机组和三级热泵机组集中蓄热，外界环境中的热量快速转移到储热水箱中，在热泵热风炉系统的间隙时间储热。
进一步地，所述的热泵热风炉系统包括喷水设备，所述喷水设备的进水管路连接储热水箱，所述喷水设备的喷水口对准蒸发器。
进一步地，所述的喷水设备包括喷水器和循环水泵，所述循环水泵的进水口通过管路与储热水箱连通，所述循环水泵的出水口通过管路与喷水器连接。
进一步地，所述循环水泵的出水口与喷水器之间设置有除霜电磁阀。
进一步地，当蒸发器结霜时，通过喷水设备将储热水箱中的热水均匀地喷到蒸发器上，利用热水进行融霜。
进一步地，当蒸发器没有结霜时，通过喷水设备将储热水箱中的热水均匀地喷到蒸发器上，用于增加蒸发器的吸热能力，以提高热泵热风炉系统的出风温度。
本发明达到的有益效果：本发明将制冷剂中多余的热量转移到储热水箱中，提高能量利用率，减少功耗。
本发明通过热水融霜，满足除霜时效果良好，还能保证粮食烘干时的出风温度不会降低。
本发明将储存的热量再利用到正常热泵热风炉的制热过程中，这样就可以达到降低热泵热风炉的系统配置的功能。
本发明采用喷淋热水融霜，不仅能达到融霜和提高蒸发器的吸热效果，同时还可以达到清洗蒸发器上的灰尘，保证蒸发器的换热效果。
附图说明
图1是本发明热泵热风炉系统的结构原理图
1-1：1号压缩机、2-1：1号冷凝器、3-1：1号节流装置、4-1：1号蒸发器、5-1：1号气液分离器、6-1：1号三通阀、7-1：1号第一电磁阀、8-1：1号第二电磁阀、9-1：1号蒸发风机、10-1：1号喷水器、11-1：1号除霜电磁阀；
1-2：2号压缩机、2-2：2号冷凝器、3-2：2号节流装置、4-2：2号蒸发器、5-2：2号气液分离器、6-2：2号三通阀、7-2：2号第一电磁阀、8-2：2号第二电磁阀、9-2：2 号蒸发风机、10-2：2号喷水器、11-2：2号除霜电磁阀；
1-3：3号压缩机、2-3：3号冷凝器、3-3：3号节流装置、4-3：3号蒸发器、5-3：3号气液分离器、6-3：3号三通阀、7-3：3号第一电磁阀、8-3：3号第二电磁阀、9-3：3号蒸发风机、10-3：3号喷水器、11-3：3号除霜电磁阀；
12：集热器、13：储热水箱、14循环水泵15：送风机。
具体实施方式
下面结合附图和具体的实施例对本发明作进一步详细的说明。
本发明的热泵热风炉系统包括送风机、热泵机组、集热器和储热水箱，其中，送风机设置于热泵机组的出风口处，新风由热泵机组的新风入风口进入热泵机组进行制热，制热后的新风由所述送风机送至烘干塔用于粮食烘干。
集热器设置于储热水箱中，储热水箱的出水口通过管路与蒸发器的管路连通，蓄热设备对集热器进行蓄热，集热器中的热量与储热水箱中的水进行热交换，加热后的水进入蒸发器管路中，使蒸发器温度升高，实现对蒸发器的蓄热除霜。
如图1，本实施例的热泵机组包括一级热泵机组、二级热泵机组和三级热泵机组，新风首先经过三级热泵机组制热，然后进入二级热泵机组，最后进入一级热泵机组，通过逐级制热后的新风，被送风机送入烘干塔用于粮食烘干。
其中，一级热泵机组包括1号压缩机1-1、1号冷凝器2-1、1号节流装置3-1、1号蒸发器4-1、1号气液分离器5-1和1号三通阀6-1。
1号压缩机1-1的入口连接1号气液分离器2-1，1号压缩机1-1的出口连接1号三通阀6-1的进口C，1号三通阀6-1的第一出口A连接1号冷凝器2-1，1号三通阀6-1的第二出口B连接集热器12。1号冷凝器2-1的出口通过1号第一电磁阀7-1连接1号蒸发器，并通过1号第二电磁阀8-1连接集热器的入口，集热器的出口连接1号蒸发器4-1。
二级热泵机组包括2号压缩机1-2、2号冷凝器2-2、2号节流装置3-2、2号蒸发器4-2、2号气液分离器5-2和2号三通阀6-2。
2号压缩机1-2的入口连接2号气液分离器2-2，2号压缩机1-2的出口连接2号三 通阀6-2的进口C，2号三通阀6-2的第一出口A连接2号冷凝器2-2，2号三通阀6-2的第二出口B连接集热器12。2号冷凝器2-2的出口通过2号第一电磁阀7-2连接2号蒸发器，并通过2号第二电磁阀8-2连接集热器的入口，集热器的出口连接2号蒸发器4-2。
三级热泵机组包括3号压缩机1-3、3号冷凝器2-3、3号节流装置3-3、3号蒸发器4-3、3号气液分离器5-3和3号三通阀6-3。
3号压缩机1-3的入口连接3号气液分离器2-3，3号压缩机1-3的出口连接3号三通阀6-3的进口C，3号三通阀6-3的第一出口A连接3号冷凝器2-3，3号三通阀6-3的第二出口B连接集热器12。3号冷凝器2-3的出口通过3号第一电磁阀7-3连接3号蒸发器，并通过3号第二电磁阀8-3连接集热器的入口，集热器的出口连接3号蒸发器4-3。
如图1，本实施例的热泵热风炉系统还包括除霜用的喷水设备，储热水箱中的水达到设定温度后，通过喷水设备喷淋到蒸发器上，对蒸发器进行进一步地喷水除霜。通过喷淋技术的运用，不仅能达到融霜和提高蒸发器的吸热效果，同时还可以达到清洗蒸发器上的灰尘，保证蒸发器的换热效果。
喷水设备包括循环水泵14以及1号喷水设备、2号喷水设备和3号喷水设备，循环水泵14的进水口通过管路与储热水箱13连通，循环水泵14的出水口通过管路与1号喷水设备、2号喷水设备和3号喷水设备的喷淋管路连接，其中：
1号喷水设备包括1号喷水器10-1和1号除霜电磁阀11-1，1号除霜电磁阀11-1设置于1号喷水器10-1与循环水泵14的出水口之间的管路上，当1号蒸发器4-1需要除霜时，1号除霜电磁阀11-1开通，循环水泵14将储热水箱13中的热水泵送到1号喷水器的喷淋管路中，通过1号喷水器喷洒热水到1号蒸发器上进行融霜。
2号喷水设备包括2号喷水器10-2和2号除霜电磁阀11-2，2号除霜电磁阀11-2设置于2号喷水器10-2与循环水泵14的出水口之间的管路上，当2号蒸发器4-2需要除霜时，2号除霜电磁阀11-2开通，循环水泵14将储热水箱13中的热水泵送到2号喷水器的喷淋管路中，通过2号喷水器喷洒热水到1号蒸发器上进行融霜。
3号喷水设备包括3号喷水器10-3和3号除霜电磁阀11-3，3号除霜电磁阀11-3 设置于3号喷水器10-3与循环水泵14的出水口之间的管路上，当3号蒸发器4-3需要除霜时，3号除霜电磁阀11-3开通，循环水泵14将储热水箱13中的热水泵送到3号喷水器的喷淋管路中，通过3号喷水器喷洒热水到3号蒸发器上进行融霜。
工作过程：
热泵机组热循环工作过程：1号压缩机(2号压缩机、3号压缩机)吸入低温低压的气态制冷剂，通过压缩做功后变为高温高压的气态，并进入1号三通阀(2号三通阀、3号三通阀)，其中一路进入1号冷凝器(2号冷凝器、3号冷凝器)，另一路直接进入集热器。
经过1号冷凝器(2号冷凝器、3号冷凝器)或集热器降温变成液态(散发的热量被转移到加热的空气中)，液态的制冷剂进入1号节流装置(2号节流装置、3号节流装置)进行节流降压，节流降压后的制冷剂流入到1号蒸发器(2号蒸发器、3号蒸发器)中，通过1号蒸发器(2号蒸发器、3号蒸发器)吸收空气中的热量变为气态制冷剂流入到1号气液分离器(2号气液分离器、3号气液分离器)中，再被1号压缩机(2号压缩机、3号压缩机)吸入，如此形成一个闭式热力循环系统。
新风加热流程：新风分别通过3号冷凝器、2号冷凝器、1号冷凝器进行多级加热，最后由送风机送入到烘干塔中进行粮食烘干。
热泵热风炉系统的蓄热模式一：烘干作业正常运行下，一级热泵机组过冷蓄热。此状态下，二级热泵机组和三级热泵机组正常运行，因为新风经过二级热泵机组和三级热泵机组两级加热后才到达一级热泵机组，一级热泵机组加热的是较高温度的热风，因此，液态制冷剂出1号冷凝器后还有较高的温度，压缩机的功率较高。此状态下利用过冷热转移技术，将出1号冷凝器后的液态制冷剂再流入集热器，再次和储热水箱中的水进行热交换，然后再流入节流装置。此状态下1号三通阀C-A导通，7-1关闭，8-1打开。二级热泵机组和三级热泵机组三通阀C-A导通，7-2、7-3打开，8-2、8-3关闭。当储热水箱中的温度达到液态制冷剂出1号冷凝器时的温度时，7-1打开，8-1关闭，蓄热模式一退出。
热泵热风炉系统的蓄热模式二：粮食降温和装卸粮时，热泵机组工作，进行热量储备。此蓄热模式下，一级热泵机组、二级热泵机组和三级热泵机组同时工作，集中蓄热， 1号三通阀、2号三通阀和3号三通阀的C-B导通，7-1、7-2、7-3以及8-1、8-2、8-3都关闭，外界环境中的热量快速转移到储热水箱中，当储热水箱中的水温达到55度时，一级热泵机组、二级热泵机组和三级热泵机组全部停止工作，蓄热结束。
化霜热利用模式：当1号蒸发器/2号蒸发器/3号蒸发器的进风温度低于10度，翅片温度低于1号蒸发器/2号蒸发器/3号蒸发器进风温度10度，且持续达到5分钟时，打开1号除霜电磁阀/2号除霜电磁阀/3号除霜电磁阀，通过1号循环水泵/2号循环水泵/3号循环水泵将储热水箱中的热水泵送到1号喷水器/2号喷水器/3号喷水器的喷淋管路，通过1号喷水器/2号喷水器/3号喷水器将储热水箱中的热水均匀地喷到1号蒸发器/2号蒸发器/3号蒸发器上，利用热水进行融霜。由于热水融霜过程吸收热水的热量，热泵机组的制热能力反而会上升，不会出现除霜时烘干的出风温度下降的现象。
不结霜热利用模式：当热泵机组处于运行状态，且1号蒸发器/2号蒸发器/3号蒸发器的进风温度高于10度，储热水箱的水温高于环境温度时，打开1号除霜电磁阀/2号除霜电磁阀/3号除霜电磁阀，通过1号循环水泵/2号循环水泵/3号循环水泵将储热水箱中的热水泵送到1号喷水器/2号喷水器/3号喷水器的喷淋管路，通过1号喷水器/2号喷水器/3号喷水器将储热水箱中的热水均匀地喷到1号蒸发器/2号蒸发器/3号蒸发器上，1号蒸发器/2号蒸发器/3号蒸发器的吸热能力增加，提高热泵热风炉系统的出风温度。

Claims (9)

  1. 一种粮食烘干用热泵热风炉系统，所述热泵热风炉系统包括送风机和热泵机组，所述送风机设置于热泵机组的出风口处，新风由所述热泵机组的新风入风口进入热泵机组进行制热，制热后的新风由所述送风机送至烘干塔用于粮食烘干，其特征在于：
    所述热泵热风炉系统包括至少两级并列运行的热泵机组，分别为一级热泵机组和二级热泵机组，经过二级热泵机组制热后的新风，再次进入一级热泵机组进行制热，所述一级热泵机组和二级热泵机组均包括蒸发器、气液分离器、压缩机、冷凝器和三通阀；
    所述的热泵热风炉系统还包括集热器和储热水箱，所述集热器位于储热水箱中，储热水箱的出水口通过管路与蒸发器的管路连通；
    所述压缩机的入口连接气液分离器，所述压缩机的出口连接三通阀的进口，所述三通阀的第一出口连接冷凝器，所述三通阀的第二出口连接集热器；
    所述冷凝器的出口通过第一电磁阀连接蒸发器，并通过第二电磁阀连接集热器的入口，所述集热器的出口连接蒸发器；
    当粮食烘干作业正常运行时，二级热泵机组正常运行，一级热泵机组过冷蓄热，一级热泵机组的第一电磁阀关闭，第二电磁阀打开，出一级热泵机组冷凝器后的液态制冷剂流入集热器，集热器中制冷剂的热量与储热水箱中的水进行热交换；
    当粮食降温和装卸粮时，一级热泵机组和二级热泵机组集中蓄热，第一电磁阀和第二电磁阀都关闭，经过压缩机后的高温高压的气态制冷剂直接进入集热器，将集热器中制冷剂的热量与储热水箱中的水进行热交换。
  2. 根据权利要求1所述的粮食烘干用热泵热风炉系统，其特征在于，所述热泵热风炉系统设置有三级热泵机组，分别为一级热泵机组、二级热泵机组和三级热泵机组，所述一级热泵机组、二级热泵机组和三级热泵机组并列运行，新风分别经过三级热泵机组、二级热泵机组和一级热泵机组进行逐级制热后用于粮食烘干。
  3. 根据权利要求2所述的粮食烘干用热泵热风炉系统，其特征在于，在热泵热风炉系统正常烘干运行过程中，一级热泵机组过冷蓄热时，二级热泵机组和三级热泵机组正 常烘干运行。
  4. 根据权利要求2所述的粮食烘干用热泵热风炉系统，其特征在于，粮食降温和装卸粮时，一级热泵机组、二级热泵机组和三级热泵机组集中蓄热，外界环境中的热量快速转移到储热水箱中，在热泵热风炉系统的间隙时间储热。
  5. 根据权利要求1所述的粮食烘干用热泵热风炉系统，其特征在于，所述的热泵热风炉系统包括喷水设备，所述喷水设备的进水管路连接储热水箱，所述喷水设备的喷水口对准蒸发器。
  6. 根据权利要求5所述的粮食烘干用热泵热风炉系统，其特征在于，根据权利要求1所述的粮食烘干用热泵热风炉系统，其特征在于，所述的喷水设备包括喷水器和循环水泵，所述循环水泵的进水口通过管路与储热水箱连通，所述循环水泵的出水口通过管路与喷水器连接。
  7. 根据权利要求6所述的粮食烘干用热泵热风炉系统，其特征在于，所述循环水泵的出水口与喷水器之间设置有除霜电磁阀。
  8. 根据权利要求1所述的粮食烘干用热泵热风炉系统，其特征在于，当蒸发器结霜时，通过喷水设备将储热水箱中的热水均匀地喷到蒸发器上，利用热水进行融霜。
  9. 根据权利要求1所述的粮食烘干用热泵热风炉系统，其特征在于，当蒸发器没有结霜时，通过喷水设备将储热水箱中的热水均匀地喷到蒸发器上，用于增加蒸发器的吸热能力，以提高热泵热风炉系统的出风温度。
PCT/CN2018/112620 2018-10-10 2018-10-30 一种粮食烘干用热泵热风炉系统 WO2020073372A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811177931.3A CN109405523A (zh) 2018-10-10 2018-10-10 一种粮食烘干用热泵热风炉系统
CN201811177931.3 2018-10-10

Publications (1)

Publication Number Publication Date
WO2020073372A1 true WO2020073372A1 (zh) 2020-04-16

Family

ID=65467459

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/112620 WO2020073372A1 (zh) 2018-10-10 2018-10-30 一种粮食烘干用热泵热风炉系统

Country Status (2)

Country Link
CN (1) CN109405523A (zh)
WO (1) WO2020073372A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111536716B (zh) * 2020-05-13 2021-11-02 江苏新七彩节能有限公司 带有分体式蒸发器组合件的空气源热泵系统及其操作方法
CN111536715B (zh) * 2020-05-13 2021-11-02 江苏新七彩节能有限公司 带余热回收组件的热泵干燥系统及其操作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200972294Y (zh) * 2006-11-17 2007-11-07 陈则韶 增加有防霜换热管的风源热泵
CN105115186A (zh) * 2015-09-15 2015-12-02 江苏天舒电器有限公司 一种热泵热水机试验室冷热平衡装置
WO2017145762A1 (ja) * 2016-02-23 2017-08-31 三菱電機株式会社 ヒートポンプ装置及び空調機
CN107764036A (zh) * 2017-10-31 2018-03-06 江苏天舒电器股份有限公司 一种无霜、多变量耦合型热泵热风炉系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204006861U (zh) * 2014-07-29 2014-12-10 江苏天舒电器有限公司 一种工业用冷热平衡机组系统
KR101972638B1 (ko) * 2016-08-01 2019-04-25 윤명진 열교환기 교번타입 히트펌프시스템

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200972294Y (zh) * 2006-11-17 2007-11-07 陈则韶 增加有防霜换热管的风源热泵
CN105115186A (zh) * 2015-09-15 2015-12-02 江苏天舒电器有限公司 一种热泵热水机试验室冷热平衡装置
WO2017145762A1 (ja) * 2016-02-23 2017-08-31 三菱電機株式会社 ヒートポンプ装置及び空調機
CN107764036A (zh) * 2017-10-31 2018-03-06 江苏天舒电器股份有限公司 一种无霜、多变量耦合型热泵热风炉系统

Also Published As

Publication number Publication date
CN109405523A (zh) 2019-03-01

Similar Documents

Publication Publication Date Title
CN202709311U (zh) 空调器系统
WO2019085453A1 (zh) 一种无霜、多变量耦合型热泵热风炉系统
CN105444310A (zh) 一种双板双冷源智能新风机组
US11248824B2 (en) Control system and control method for frostless, multivariable coupling, and heat pump-based hot blast stove
CN108775729B (zh) 蒸发冷热泵机组
CN105135739A (zh) 多功能热泵型蒸发式冷凝空调机组
WO2020073372A1 (zh) 一种粮食烘干用热泵热风炉系统
CN106705203B (zh) 一种采用热泵和电热复合的户用热管散热装置
CN208000031U (zh) 一种热泵热风炉结构
CN204574476U (zh) 一种热水机干衣系统
CN102620489B (zh) 一种带防冻溶液再生热回收装置的空调热泵机组
CN203964449U (zh) 一种单双级可切换的热泵
CN207395067U (zh) 一种用于蔬菜大棚的恒温热泵系统
CN103759352A (zh) 一种综合利用热泵和太阳能的相变储能系统
CN107228427B (zh) 一种壁挂式双金属辐射板的一拖多空气源双末端系统
CN105758045A (zh) 一种超低温复叠式三联供热泵机组
CN105423620A (zh) 一种高效的大温升两级节流中间冷却热泵热水机
CN103574967A (zh) 一种带防冻溶液再生装置的空调热泵机组
CN219141147U (zh) 一种交替除霜的空气源热泵机组
CN104121721A (zh) 一种单双级可切换的热泵
CN201072271Y (zh) 节能除霜热泵机组
CN204154012U (zh) 一种带防冻溶液再生装置的空调热泵机组
CN210718209U (zh) 具有除霜功能的热泵系统
CN210399502U (zh) 热泵系统
CN202675751U (zh) 一种带防冻溶液再生热回收装置的空调热泵机组

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18936685

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18936685

Country of ref document: EP

Kind code of ref document: A1