CN105737545A - Heat pump drying equipment fully utilizing humidity and heat - Google Patents
Heat pump drying equipment fully utilizing humidity and heat Download PDFInfo
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- CN105737545A CN105737545A CN201610252747.5A CN201610252747A CN105737545A CN 105737545 A CN105737545 A CN 105737545A CN 201610252747 A CN201610252747 A CN 201610252747A CN 105737545 A CN105737545 A CN 105737545A
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- heat pump
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- 238000001035 drying Methods 0.000 title claims abstract description 74
- 238000007791 dehumidification Methods 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 8
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/10—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in the open air; in pans or tables in rooms; Drying stacks of loose material on floors which may be covered, e.g. by a roof
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- A23B2/00—Preservation of foods or foodstuffs, in general
- A23B2/90—Preservation of foods or foodstuffs, in general by drying or kilning; Subsequent reconstitution
-
- 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
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
- F26B23/005—Heating arrangements using waste heat recovered from dryer exhaust gases using a closed cycle heat pump system ; using a heat pipe system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
本发明公开了一种充分利用湿热量的热泵干燥设备，热泵干燥设备由烘干室，回风风道和热泵主机室构成，所述回风风道位于烘干室上部并下延伸至地面，回风风道和烘干室的结合处设置有加热器，所述加热器通过连接铜管和热泵主机连接，所述热泵主机置放在热泵主机室构成为干燥设备供应热量的热泵系统。所述回风风道内安装有循环风机，回风风道与外界接触的侧墙上安装有新风风门，回风风道上部安装有排湿风机和排湿风道，所述排湿风道延长伸至热泵主机室内，烘干室里的湿热空气通过排湿风机和排湿风道排入热泵主机室内。
The invention discloses a heat pump drying device which fully utilizes the heat of humidity. The heat pump drying device is composed of a drying chamber, a return air duct and a heat pump host room. The return air duct is located at the upper part of the drying chamber and extends downward to the ground. A heater is provided at the junction of the return air duct and the drying chamber, and the heater is connected to the heat pump host through connecting copper pipes. The heat pump host is placed in the heat pump host room to form a heat pump system for supplying heat to the drying equipment. A circulating fan is installed in the return air duct, a fresh air damper is installed on the side wall of the return air duct in contact with the outside world, a humidity exhaust fan and a humidity exhaust duct are installed on the upper part of the return air duct, and the humidity exhaust duct is extended Extending to the heat pump host room, the hot and humid air in the drying room is discharged into the heat pump host room through the dehumidification fan and the dehumidification air duct.
Description
技术领域：Technical field:
本发明涉及一种热泵干燥设备，特别适用于农副产品等其它作物脱水干燥时的专用设备。The invention relates to a heat pump drying equipment, which is especially suitable for the dehydration and drying of agricultural by-products and other crops.
背景技术：Background technique:
目前，热泵干燥设备在干燥设备领域有广阔的发展前景，特别是在75℃以下的烘干领域。随着国家对节约能源、环境保护等方面越来越重视，热泵干燥设备的应用越来越受到人们的重视。At present, heat pump drying equipment has broad development prospects in the field of drying equipment, especially in the field of drying below 75 °C. As the country pays more and more attention to energy conservation and environmental protection, the application of heat pump drying equipment has attracted more and more attention.
热泵干燥设备是物料干燥的专用设备，热泵系统为干燥设备提供热量供给，把经过升温后的气流送入烘干室，高温干燥的气流把物料中的水汽带走，从而达到干燥的目的。随着高温气流不断带走水汽，气流的温度的逐渐降低，湿度增加，对物料的脱水能力逐渐降低；当气流湿度达到设定湿度目标后排出一部分烘干房内的热湿空气，同时引入环境中的干燥空气，继续进行脱水干燥过程。Heat pump drying equipment is a special equipment for material drying. The heat pump system provides heat supply for the drying equipment, and sends the heated airflow into the drying chamber. The high-temperature dry airflow takes away the water vapor in the material, so as to achieve the purpose of drying. As the high-temperature airflow continues to take away water vapor, the temperature of the airflow gradually decreases, the humidity increases, and the dehydration ability of the material gradually decreases; when the humidity of the airflow reaches the set humidity target, a part of the hot and humid air in the drying room is discharged, and at the same time introduced into the environment In the dry air, continue the dehydration drying process.
目前热泵干燥设备在较低环境温度中热泵制热量和能效比均比较低，所以在选配热泵时，经常会按照低环境温度下的热负荷进行匹配，此时热泵设备选配会很大，不但增加了干燥设备的初始投资，在低环境温度下热泵干燥设备的能效比较低，节能优势减弱，而且在环境温度较高时，热泵设备的利用率很低。另一方面，热泵干燥设备排出的热湿空气得不到有效利用，大部分热量排出到环境中，造成热量的浪费。At present, the heating capacity and energy efficiency ratio of heat pump drying equipment are relatively low in lower ambient temperatures, so when selecting heat pumps, they are often matched according to the heat load at low ambient temperatures. At this time, the selection of heat pump equipment will be very large. Not only does it increase the initial investment of drying equipment, the energy efficiency of heat pump drying equipment is relatively low under low ambient temperature, and the advantage of energy saving is weakened, and when the ambient temperature is high, the utilization rate of heat pump equipment is very low. On the other hand, the hot and humid air discharged from the heat pump drying equipment is not effectively utilized, and most of the heat is discharged into the environment, resulting in waste of heat.
发明内容：Invention content:
本发明的任务是提出利用排湿热量，降低选配设备数量和生产成本的一种充分利用湿热量的热泵干燥设备。The task of the present invention is to propose a heat pump drying equipment that fully utilizes the heat of humidity and reduces the number of optional equipment and production costs by using the heat of moisture removal.
本发明的任务是这样完成的，其特征在于：热泵干燥设备由烘干室，回风风道和热泵主机室构成，所述回风风道位于烘干室上部并下延伸至地面，回风风道和烘干室的结合处设置有加热器，所述加热器通过连接铜管和热泵主机连接，所述热泵主机置放在热泵主机室构成为干燥设备供应热量的热泵系统。所述回风风道内安装有循环风机，回风风道与外界接触的侧墙上安装有新风风门，回风风道上部安装有排湿风机和排湿风道，所述排湿风道延长伸至热泵主机室内，烘干室里的湿热空气通过排湿风机和排湿风道排入热泵主机室内。所述烘干室内放置待烘干的物料，物料由装载装置承载，烘干室内的空气是通过加热器加热后由回风风道和循环风机将热风输送烘干室。所述热泵主机室内放置至少一台，热泵主机室内安放有主机室温度传感器，热泵主机室外侧与外界接触处安放有测量环境温度的传感器，热泵主机上部设置排风风腔，所述排风风腔内设置有主机室内循环风门和排风风门。所述主机室内循环风门设置在排风风腔与主机室相接触的壁上，所述排风风门设置在排风风腔与外界接触的壁上。所述热泵主机内包含压缩机、膨胀阀、蒸发器和热泵管路。所述排风风腔上设置的主机室内循环风门和排风风门，受环境温度传感器和主机室温度传感器由智能控制开启或关闭。a、当主机室温度低于环境温度时，排风风门打开，主机室内循环风门关闭；外界空气通过百叶窗进入主机室，热泵主机与进入主机室的空气进行冷量交换后，排入到排风风腔内，经排风风门排出到外界环境；b、当主机室温度不低于环境温度时，排风风门关闭，主机室内循环风门打开；热泵主机吸收主机室内空气，经过冷量交换后排入到排风风腔内，经主机室内循环风门重新进入主机室，再次被热泵主机吸入利用；c、当主机室温度高于40℃时，排风风门打开，主机室内循环风门关闭；强制把过高温度的空气排出主机室，防止热泵主机电流过高。The task of the present invention is accomplished in this way, and it is characterized in that: the heat pump drying equipment is composed of a drying chamber, a return air duct and a heat pump host room, the return air duct is located at the upper part of the drying chamber and extends down to the ground, and the return air A heater is provided at the junction of the air duct and the drying chamber, and the heater is connected to the heat pump host through connecting copper pipes. The heat pump host is placed in the heat pump host room to form a heat pump system for supplying heat to the drying equipment. A circulating fan is installed in the return air duct, a fresh air damper is installed on the side wall of the return air duct in contact with the outside world, a humidity exhaust fan and a humidity exhaust duct are installed on the upper part of the return air duct, and the humidity exhaust duct is extended Extending to the heat pump host room, the hot and humid air in the drying room is discharged into the heat pump host room through the dehumidification fan and the dehumidification air duct. Materials to be dried are placed in the drying chamber, and the materials are carried by the loading device. The air in the drying chamber is heated by a heater and then the hot air is sent to the drying chamber by the return air duct and the circulating fan. At least one of the heat pump hosts is placed in the room, a host room temperature sensor is placed in the heat pump host room, a sensor for measuring the ambient temperature is placed on the outside of the heat pump host room in contact with the outside world, and an exhaust air cavity is arranged on the upper part of the heat pump host. The cavity is provided with a main engine indoor circulation damper and an exhaust damper. The circulation damper in the main engine room is arranged on the wall of the exhaust air cavity in contact with the main engine room, and the exhaust air door is arranged on the wall of the exhaust air cavity in contact with the outside. The heat pump host includes a compressor, an expansion valve, an evaporator and heat pump pipelines. The main engine indoor circulation damper and the exhaust air damper arranged on the exhaust air cavity are opened or closed by intelligent control by the ambient temperature sensor and the main engine room temperature sensor. a. When the temperature of the main engine room is lower than the ambient temperature, the exhaust damper is opened, and the circulation air door of the main engine room is closed; the outside air enters the main engine room through the louvers, and the heat pump main engine exchanges cooling capacity with the air entering the main engine room, and is discharged into the exhaust air In the air cavity, it is discharged to the external environment through the exhaust damper; b. When the temperature of the host room is not lower than the ambient temperature, the exhaust damper is closed, and the circulation damper in the host room is opened; the heat pump host absorbs the air in the host room, and is discharged after cooling exchange into the exhaust air cavity, re-enter the main engine room through the main engine indoor circulation damper, and be sucked and used by the heat pump main engine again; c. When the main engine room temperature is higher than 40 ℃, the exhaust air door is opened, and the main engine indoor circulation damper is closed; Excessively high temperature air is exhausted from the host room to prevent the heat pump host from over-current.
本发明具有以下效果：本技术方案保证物料在低环境温度下能够正常脱水干燥，在不增加（少量增加）热泵能力情况下，保持热泵高效运行，提高低环境温度下热泵运行的能效比。本结构设计简单，易于实现，而且节约干燥设备初始投资，提高能源利用率。The invention has the following effects: the technical solution ensures that materials can be dehydrated and dried normally at low ambient temperature, keeps the heat pump running efficiently without increasing (increasing slightly) the heat pump capacity, and improves the energy efficiency ratio of the heat pump operation at low ambient temperature. The structure is simple in design, easy to implement, saves initial investment in drying equipment, and improves energy utilization rate.
附图说明：Description of drawings:
图1是本技术方案的结构示意图；图2是图1的侧视图；图3是图1的俯视图；图4是本结构不排湿、不引入新风的工作状态示意图；图5是图4的侧视图；图6是本结构工作时排湿、引入新风的示意图；图7是图6的侧视图；图8是图7的俯视图。Fig. 1 is a schematic structural view of the technical solution; Fig. 2 is a side view of Fig. 1; Fig. 3 is a top view of Fig. 1; Fig. 4 is a schematic view of the working state of the structure without dehumidification and no introduction of fresh air; Fig. 5 is a schematic view of Fig. 4 Side view; Figure 6 is a schematic diagram of dehumidification and introduction of fresh air when the structure is working; Figure 7 is a side view of Figure 6; Figure 8 is a top view of Figure 7.
图面说明：1、热泵干燥设备，2、环境温度传感器，3、热泵主机室，4、热泵主机，5、主机室温度传感器，6、循环风机，7、连接铜管，8、加热器，9、烘干室，10、物料装载装置，11、物料，12、回风风道，13、排湿风机，14、排湿风道，15、百叶窗，16、主机室内循环风门，17、排风风门，18、新风风门，19、排风风腔。Drawing description: 1. Heat pump drying equipment, 2. Ambient temperature sensor, 3. Heat pump main engine room, 4. Heat pump main engine, 5. Main engine room temperature sensor, 6. Circulating fan, 7. Connecting copper pipes, 8. Heater, 9. Drying chamber, 10. Material loading device, 11. Material, 12. Return air duct, 13. Humidity exhaust fan, 14. Humidity exhaust duct, 15. Shutters, 16. Main engine indoor circulation damper, 17. Exhaust Air damper, 18, fresh air damper, 19, exhaust air cavity.
具体实施方式：detailed description:
结合以上附图详细描述实施例，如图1、图2和图3所示，热泵干燥设备1由烘干室9，回风风道12和热泵主机室3构成，所述回风风道12位于烘干室9上部并下延伸至地面，回风风道和烘干室9的结合处设置有加热器8，所述加热器通过连接铜管7和热泵主机4连接，所述热泵主机置放在热泵主机室3构成为干燥设备供应热量的热泵系统，所述加热器是选用热泵冷凝器；The embodiment is described in detail in conjunction with the above drawings. As shown in FIGS. Located on the upper part of the drying chamber 9 and extending down to the ground, a heater 8 is provided at the junction of the return air duct and the drying chamber 9, and the heater is connected to the heat pump host 4 through a copper pipe 7, and the heat pump host is installed Placed in the heat pump host room 3 to form a heat pump system for supplying heat to the drying equipment, the heater is a heat pump condenser;
所述回风风道12内安装有循环风机6，回风风道与外界接触的侧墙上安装有新风风门18如图3所示，用于引入外界的干燥室气，回风风道上部安装有排湿风机13和排湿风道14，所述排湿风道延长伸至热泵主机室内，烘干室里的湿热空气可以通过排湿风机13通过排湿风道14排入热泵主机室内（如图1所示）；A circulating fan 6 is installed in the return air duct 12, and a fresh air damper 18 is installed on the side wall of the return air duct in contact with the outside world, as shown in Figure 3, for introducing the drying room air from the outside. A dehumidification blower 13 and a dehumidification air duct 14 are installed, and the dehumidification air duct extends to the heat pump main engine room, and the hot and humid air in the drying room can be discharged into the heat pump main engine room through the dehumidification exhaust fan 13 and the dehumidification air duct 14 (As shown in Figure 1);
所述烘干室内放置待烘干的物料11，物料由装载装置10承载，烘干室内的空气是通过加热器8加热后由回风风道和循环风机将热风输送烘干室，用于物料的烘干；The material 11 to be dried is placed in the drying chamber, and the material is carried by the loading device 10. After the air in the drying chamber is heated by the heater 8, the hot air is sent to the drying chamber by the return air duct and the circulating fan, and is used for the drying of the material. drying;
所述热泵主机室3内放置至少一台热泵主机4，可以根据工作需要放置一台或多台，热泵主机室内安放有主机室温度传感器5，用于测量热泵主机室的温度，热泵主机室外侧与外界接触处安放有测量环境温度的传感器2，热泵主机4上部设置排风风腔19，所述排风风腔内设置有主机室内循环风门16和排风风门17，所述主机室内循环风门16设置在排风风腔19与主机室相接触的壁上，所述排风风门17设置在排风风腔19与外界接触的壁上（如图3所示），热泵主机换热后的空气排入到排风风腔内，通过主机室内循环风门重新循环回到主机室或者通过排风风门排出到外界，其具体智能控制可选用PLC或单片机，具体控制如下所述：At least one heat pump main engine 4 is placed in the heat pump main engine room 3, and one or more can be placed according to work needs. A main engine room temperature sensor 5 is placed in the heat pump main engine room to measure the temperature of the heat pump main engine room. A sensor 2 for measuring the ambient temperature is placed at the contact with the outside world. An exhaust air cavity 19 is arranged on the upper part of the heat pump host 4, and the exhaust air cavity is provided with a main engine indoor circulation damper 16 and an exhaust air damper 17. The main engine indoor circulation damper 16 is arranged on the wall of the exhaust air chamber 19 in contact with the host room, and the exhaust damper 17 is arranged on the wall of the exhaust air chamber 19 in contact with the outside world (as shown in Figure 3). The air is exhausted into the exhaust air cavity, and recirculated back to the main engine room through the circulation damper in the main engine room or discharged to the outside through the exhaust damper. The specific intelligent control can be PLC or single-chip microcomputer, and the specific control is as follows:
所述排风风腔19上设置的主机室内循环风门16和排风风门17受环境温度传感器2和主机室温度传感器5由智能控制开启或关闭；其具体控制逻辑为：The main engine indoor circulation damper 16 and exhaust air damper 17 set on the exhaust air chamber 19 are opened or closed by intelligent control by the ambient temperature sensor 2 and the main engine room temperature sensor 5; the specific control logic is:
a、当主机室温度低于环境温度时，排风风门17打开，主机室内循环风门16关闭；外界空气通过百叶窗15进入主机室，热泵主机与进入主机室的空气进行冷量交换后，排入到排风风腔19内，经排风风门17排出到外界环境；a. When the temperature of the main engine room is lower than the ambient temperature, the exhaust damper 17 is opened, and the circulation air door 16 of the main engine room is closed; the outside air enters the main engine room through the louvers 15, and the heat pump main engine exchanges cooling capacity with the air entering the main engine room, and is discharged into the main engine room. into the exhaust air cavity 19, and then discharged to the external environment through the exhaust damper 17;
b、当主机室温度不低于环境温度时，排风风门17关闭，主机室内循环风门16打开；热泵主机吸收主机室内空气，经过冷量交换后排入到排风风腔19内，经主机室内循环风门16重新进入主机室，再次被热泵主机吸入利用；b. When the temperature of the host room is not lower than the ambient temperature, the exhaust damper 17 is closed, and the circulation damper 16 of the host room is opened; the heat pump host absorbs the air in the host room, and discharges it into the exhaust air chamber 19 after cooling exchange, and passes through the host The indoor circulation damper 16 re-enters the main engine room, and is sucked and utilized by the heat pump main engine again;
c、当主机室温度高于40℃（具体温度数值根据不同情况可调）时，排风风门17打开，主机室内循环风门16关闭；强制把过高温度的空气排出主机室，防止热泵主机电流过高。c. When the temperature of the host room is higher than 40°C (the specific temperature value can be adjusted according to different situations), the exhaust damper 17 is opened, and the circulation damper 16 in the host room is closed; the overheated air is forced out of the host room to prevent the heat pump from running too high.
所述热泵干燥设备为减少系统内热量向外传递，减少热量损失，烘干室9、回风风道12和热泵主机室3的外壁均选用绝热性能较好的保温材料，如聚氨酯保温板、岩棉保温板等；In order to reduce the heat transfer in the system to the outside and reduce heat loss, the heat pump drying equipment is equipped with thermal insulation materials with good thermal insulation performance for the outer walls of the drying chamber 9, the return air duct 12 and the heat pump main engine chamber 3, such as polyurethane insulation boards, Rock wool insulation board, etc.;
所述热泵主机4内包含压缩机、膨胀阀、蒸发器、热泵管路及其他制冷配件；设置热泵主机可使热泵系统结构更加紧凑，安装使用方便；The heat pump host 4 includes a compressor, an expansion valve, an evaporator, a heat pump pipeline and other refrigeration accessories; the heat pump host can make the structure of the heat pump system more compact and easy to install and use;
设备工作状态为不排湿、不引入新风的工作状态如图4所示，此时由于主机室3内无干燥设备的排湿热量供应或热泵主机室3内的排湿热量已充分利用完成，主机室内温度与环境温度基本一致（或略低于环境温度），此时排风风门17打开，主机室内循环风门16关闭；外界空气通过百叶窗15进入主机室，热泵主机与进入主机室的空气进行冷量交换后，排入到排风风腔19内，经排风风门17排出到外界环境。热泵主机与外界环境进行热量交换，保证热泵系统正常运行，此工作状态与普通热泵干燥装置工作过程相同。The working state of the equipment is the working state of no dehumidification and no introduction of fresh air, as shown in Figure 4. At this time, since there is no dehumidification heat supply from the drying equipment in the host room 3 or the dehumidification heat in the heat pump host room 3 has been fully utilized, The indoor temperature of the main engine is basically the same as the ambient temperature (or slightly lower than the ambient temperature). At this time, the exhaust damper 17 is opened, and the circulation damper 16 in the main engine room is closed. After the cooling capacity is exchanged, it is discharged into the exhaust air cavity 19 and discharged to the external environment through the exhaust air door 17 . The heat pump host exchanges heat with the external environment to ensure the normal operation of the heat pump system. This working state is the same as that of the ordinary heat pump drying device.
此工作状态为排湿引入新风的工作状态如图6所示，此时由于主机室3内接收干燥设备的排湿热量，主机室内温度会高于环境温度，此时排风风门17关闭，主机室内循环风门16打开；热泵主机吸入主机室内空气，经过冷量交换后排入到排风风腔19内，经主机室内循环风门16重新进入主机室，再次被热泵主机吸入利用；由于从干燥设备排出的热湿空气温度较高、湿度较大，可被热泵主机利用的热量很大。依靠热泵主机室所形成的空间，把未充分利用的热量再次循环利用，直到主机室温度低于环境温度后，排风风门17打开，主机室内循环风门16关闭，热泵干燥设备再次循环不排湿、不引入新风的工作状态。This working state is the working state of dehumidification and introduction of fresh air, as shown in Figure 6. At this time, because the main engine room 3 receives the heat of dehumidification from the drying equipment, the temperature in the main engine room will be higher than the ambient temperature. At this time, the exhaust damper 17 is closed, and the main engine The indoor circulation damper 16 is opened; the heat pump main engine sucks the air in the main engine room, and after the cooling exchange, it is discharged into the exhaust air cavity 19, and re-enters the main engine room through the main engine indoor circulation damper 16, and is sucked and utilized by the heat pump main engine again; The discharged hot and humid air has high temperature and high humidity, and the heat that can be utilized by the heat pump host is large. Depending on the space formed by the heat pump host room, the underutilized heat is recycled again until the temperature of the host room is lower than the ambient temperature, the exhaust damper 17 is opened, the circulation damper 16 in the host room is closed, and the heat pump drying equipment circulates again without dehumidification , The working state of not introducing fresh air.
另一方面在热泵干燥过程中依靠排湿来排出物料中的水分，排湿过程占总干燥过程的比例较大，排湿热量利用非常可观，即使在低环境温度下，热泵蒸发温度不会很低，可较大幅度提高热泵制热量和热泵能效比。此干燥设备运行状态为本发明的特点。On the other hand, in the heat pump drying process, the moisture in the material is discharged by dehumidification. The dehumidification process accounts for a large proportion of the total drying process, and the utilization of dehumidification heat is very considerable. Even in low ambient temperatures, the evaporation temperature of the heat pump will not be very high. Low, can greatly improve the heating capacity of the heat pump and the energy efficiency ratio of the heat pump. The running state of this drying equipment is a feature of the present invention.
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| CN106568303A (en) * | 2016-08-23 | 2017-04-19 | 曾进 | Emperor chrysanthemum drying device |
| CN106855353A (en) * | 2017-03-31 | 2017-06-16 | 河南佰衡节能科技股份有限公司 | Heat pump drying equipment and drying means with dehumidification type Yu hydrofuge type handoff functionality |
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| CN107702460A (en) * | 2017-09-30 | 2018-02-16 | 贵州雷山鼎盛银球茶业集团有限公司 | A kind of tealeaves baking machine |
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| CN110360813A (en) * | 2019-07-23 | 2019-10-22 | 佛山市瑞海制冷设备有限公司 | A kind of tobacco roasting heat-pump apparatus cooling tower cooling system |
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| CN112484406A (en) * | 2020-11-15 | 2021-03-12 | 云南省烟草农业科学研究院 | Energy-saving control method for air source heat pump curing barn, storage medium and energy-saving curing barn |
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| CN111664666A (en) * | 2020-06-11 | 2020-09-15 | 青岛科技大学 | Seed heat pump drying device with multiple operation modes |
| CN112484406A (en) * | 2020-11-15 | 2021-03-12 | 云南省烟草农业科学研究院 | Energy-saving control method for air source heat pump curing barn, storage medium and energy-saving curing barn |
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