WO2013023459A1 - 废湿热空气全热回收系统及方法 - Google Patents

废湿热空气全热回收系统及方法 Download PDF

Info

Publication number
WO2013023459A1
WO2013023459A1 PCT/CN2012/074714 CN2012074714W WO2013023459A1 WO 2013023459 A1 WO2013023459 A1 WO 2013023459A1 CN 2012074714 W CN2012074714 W CN 2012074714W WO 2013023459 A1 WO2013023459 A1 WO 2013023459A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
temperature
heat recovery
water tank
pressure
Prior art date
Application number
PCT/CN2012/074714
Other languages
English (en)
French (fr)
Inventor
陈越增
王立明
汪志强
邓军琦
Original Assignee
宁波惠康实业有限公司
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 宁波惠康实业有限公司 filed Critical 宁波惠康实业有限公司
Publication of WO2013023459A1 publication Critical patent/WO2013023459A1/zh

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/06Heat pumps characterised by the source of low potential heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F24H4/02Water heaters
    • F24H4/04Storage heaters
    • 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
    • F24H9/00Details
    • F24H9/20Arrangement or mounting of control or safety devices
    • F24H9/2007Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021Storage heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001Recuperative heat exchangers
    • F28D21/0014Recuperative heat exchangers the heat being recuperated from waste air or from vapors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00Domestic hot-water supply systems
    • F24D17/02Domestic hot-water supply systems using heat pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00Heat sources or energy sources
    • F24D2200/16Waste heat
    • F24D2200/22Ventilation air

Definitions

  • the present invention relates to an air total heat recovery system and method, and more particularly to a waste heat and hot air full heat recovery system and method that can be used in a hotel laundry room, a printing and dyeing factory, and the like.
  • the present invention is directed to overcoming the deficiencies of the prior art described above and provides a waste humid hot air full heat recovery system and method.
  • the system can effectively collect the heat energy in the waste hot and humid air discharged from the working environment of the hotel laundry room, printing and dyeing factory, and recycle it to heat the tap water, which is then used in the washing process to save energy and reduce consumption.
  • a waste humid hot air full heat recovery system is applied to a relatively closed high temperature and high humidity working environment, including a heat recovery unit and a heat utilization device, and the heat recovery unit includes An evaporator in a working environment, a condenser connected to the evaporator through a pipe, and a compressor connected to the evaporator and the condenser through a pipe; the heat utilization device including a condenser connected to the condenser through a circulation pipe a water tank, and a water conveying device connected to the water outlet pipe of the water tank; wherein the water tank is further provided with an inlet pipe and an outlet pipe connectable to the tap water pipe.
  • the heat recovery unit further includes a circulation fan disposed near the evaporator, and a ventilation duct connected to an air outlet of the circulation fan.
  • the evaporator is used to exchange heat between the waste hot humid air in the environment and the refrigerant in the evaporator, and therefore, it is necessary to determine the installation position according to the actual conditions of the site.
  • the circulating fan is for conveying the air after heat exchange with the evaporator to the air supply duct. Therefore, the installation of the circulating fan needs to be based on the installation conditions on the site, the airflow direction, the specifications of the fan, and the air supply duct. Actual conditions such as location determine a suitable location near the evaporator.
  • the heat utilization apparatus further includes a washing machine as a heat using device, the washing machine itself having water heating and maintaining a water temperature function, the heat using device being connected downstream of the water conveying device.
  • a cooling hot water pump is disposed in the circulation pipe between the water tank and the condenser.
  • the water conveying device includes a constant pressure water pump connected to a water outlet pipe of the water tank, a pressure sensor for detecting a pressure in a water outlet pipe of the water tank, and a temperature of a water temperature in a water outlet pipe of the water tank. a sensor, and a frequency converter that controls the operation of the constant pressure water pump.
  • the waste humid hot air full heat recovery system further includes a plurality of temperature and humidity sensors for detecting temperature and humidity in the working environment, and a control unit communicably connected to the plurality of temperature and humidity sensors; and the control unit further Communicating with the pressure sensor and the temperature sensor, electrically connecting with the cooling hot water pump and the frequency converter, and controlling the cooling hot water pump according to the detection signals of the plurality of temperature and humidity sensors and the temperature sensor The action of controlling the frequency converter is based on the detection signals of the temperature sensor and the pressure sensor.
  • the control unit is one of a human-machine interactive PLC controller with a touch screen, a single-chip controller or other computer control system.
  • a waste heat and hot air full heat recovery method comprises the following steps:
  • the water supply will be delayed, and the water supply of the water pipe will reduce the water temperature of the water tank to the set temperature and supply water. For example, the water level reaches the upper limit of 7j during the process of cooling water.
  • the water supply is immediately provided; if there is a mandatory water supply request, the water is supplied immediately regardless of the temperature;
  • the evaporator can effectively exchange heat between the waste hot and humid air in the working site and the refrigerant in the evaporator, so that the total heat contained in the process of cooling and dehumidifying the high temperature and high humidity air is absorbed by the refrigerant. It can also reduce the heat when the workplace is cooled and dehumidified.
  • the refrigerant is compressed by the compressor and then enters the condenser to release the heat absorbed from the evaporator.
  • the condenser and the water tank are connected through the circulation pipe, and the heat released by the refrigerant can be conveniently used to carry the water in the water tank. Heating to achieve the effect of waste heat utilization.
  • the circulating fan and the air supply duct can send the air after cooling and dehumidifying treatment to the designated position inside the workplace, effectively achieving the effect of cooling and dehumidifying the working environment.
  • the cooling hot water pump can supply the water in the water tank to the condenser sufficiently, so as to effectively achieve the heating of the water, the heat in the condenser can be prevented from being transmitted in time to cause overheating.
  • the constant pressure water pump can realize the control of the water pressure in the water outlet pipe of the water tank under the control of the frequency converter.
  • the standard water pressure is preset according to the requirements of the use.
  • the frequency converter The frequency can be increased to control the constant pressure water pump to increase the water pressure to the set water pressure; when the water outlet pressure of the water tank is higher than the set water pressure, the frequency converter reduces the frequency to control the constant pressure water pump to reduce the pressure of 7j to the set water pressure, thereby Ensure that the hot water supplied to the hot-water equipment is constant.
  • the sewage outlet set on the water tank is normally closed, and it needs to be opened when cleaning. It can facilitate the cleaning and maintenance of the water tank.
  • FIG. 1 is a schematic structural view of a waste humidified hot air full heat recovery system of the present invention
  • FIG. 2 is a flow chart of the operation method of the present invention.
  • the following reference numerals are marked on the drawing in conjunction with the drawings:
  • a waste humid hot air full heat recovery system is applied to a relatively closed high temperature and high humidity working environment, as shown in Fig. 1, comprising a heat recovery unit 3 and a heat utilization device.
  • the heat recovery unit 3 includes an evaporator 31 disposed in a working environment, a condenser 32 connected to the evaporator 31 through a pipe, and a compressor 33 connected to the evaporator 31 and the condenser 32 through a pipe.
  • a refrigerant such as a common shield of freon, ammonia, propane or ethylene is used as the refrigerant in the evaporator 31, the condenser 32, and the compressor 33.
  • the heat recovery unit 3 further includes a circulation fan 34 disposed near the evaporator 31, and an air-conditioning air supply duct 5 connected to the air outlet of the circulation fan 34 for cooling and dehumidifying the working environment, and the air supply duct 5 is provided.
  • the evaporator 31 is used for exchanging heat between the waste humid air and the refrigerant in the environment.
  • the circulating fan 34 is for the air that has been exchanged with the evaporator 31 to be sent to the air supply duct 5. Therefore, the installation of the circulating fan 34 needs to be based on the installation conditions on the site, the direction of the airflow, the specifications of the fan, and the delivery. Actual conditions such as the position of the air duct 5 are used to determine a proper position in the vicinity of the evaporator 31 in order to obtain a good exhaust effect.
  • the working principle of the heat recovery unit 3 is as follows: The compressor 33 compresses the refrigerant in the low-pressure steam state into high-pressure steam, and the high-pressure steam is discharged into the condenser 32, and the external heat-dissipating surface of the condenser 32 exchanges heat with the water in the water tank 4.
  • the high pressure steam in the condenser 32 is condensed into a high pressure liquid after the heat is released, while the tap water in the water tank 4 absorbs heat to form hot water used by the heat utilization equipment
  • the high pressure liquid in the condenser 32 further enters the evaporator 31,
  • the evaporator 31 exchanges heat with waste hot humid air from the working environment (i.e., the aforementioned high pressure liquid entering the evaporator 31 evaporates and absorbs heat in a low pressure state in the evaporator 31 while flowing waste heat through the surface of the evaporator 31. After the air is cooled and dehumidified, it enters the air supply duct 5 through the action of the circulation fan 34, and finally returns to the working environment).
  • the whole system cools the waste hot and humid air on the surface of the evaporator 31, condenses it into water, and then uses the heat absorbed by the whole cooling process to heat the water of the heat utilization system, thereby effectively realizing energy recycling, and at the same time, the temperature of the air and Humidity has dropped significantly.
  • the air temperature in the above working environment can be controlled at 26 to 28 degrees Celsius, and the humidity is controlled at 55% to 65%.
  • the heat utilization device includes a water tank 4 connected to the condenser 32 through a circulation pipe, and a water delivery device 42 connected to the water outlet pipe of the water tank 4; wherein the volume of the water tank satisfies the total heat per shift In the state of absorbing and no water request, the water tank 4 is further provided with an inlet pipe 43, a water outlet pipe 44, and a drain port 45 to which a tap water pipe can be connected.
  • the external 7J device in this example is the washing machine 2, which itself has a water heating function and a water temperature maintaining function, and is connected downstream of the water conveying device 42.
  • the circulation duct includes a pipe for delivering water from the condenser 32 to the water tank 4 and a pipe for delivering water from the water tank 4 to the condenser 32, and cooling heat is provided in the pipe for delivering water from the water tank 4 to the condenser 32.
  • Water pump 41 When the cooling hot water pump 41 is operated, the amount of water supplied from the water tank 4 to the condenser 32 can be secured.
  • the water conveying device 42 includes a constant pressure water pump 421 connected to the water outlet pipe of the water tank 4, a pressure sensor 422 that detects the pressure in the water outlet pipe of the water tank 4, and detects the water outlet pipe of the water tank 4.
  • the frequency converter can control the output pressure of the constant pressure water pump 421, and the frequency converter adjusts the frequency according to the change of the value of the pressure sensor 422 so that the downstream water pressure of the constant pressure water pump 421 in the water outlet pipeline is kept constant, and the downstream of the constant pressure water pump 421 A pipe is connected to the washing machine 2.
  • the value of the pressure sensor 422 corresponds to the optimum water level of the water tank and the optimum frequency set by the frequency converter. When the washing machine 2 requests water supply to the water tank 4, the pressure sensor 422 detects the corresponding change while the water level of the water tank 4 changes.
  • the frequency converter controls the output of the frequency according to the value change of the pressure sensor 422.
  • the frequency converter is up-converted.
  • the frequency converter is down-converted.
  • the water pressure outputted by the constant pressure water pump 421 is controlled to be constant.
  • the waste humid hot air full heat recovery system further includes a plurality of temperature and humidity sensors (not shown) for detecting temperature and humidity in the working environment, and a control unit (not shown) communicably connected to the plurality of temperature and humidity sensors; And the control unit is further in communication connection with the pressure sensor 422 and the temperature sensor 423, and the cooling hot water pump 41 And the inverter are electrically connected, and the operation of the cooling hot water pump 41 is controlled according to the detection signals of the plurality of temperature and humidity sensors and the temperature sensor 423, according to the detection of the temperature sensor 423 and the pressure sensor 422 The signal controls the action of the frequency converter.
  • the control unit is one of a human-machine interactive PLC controller with a touch display, a single-chip controller or other computer control system.
  • the optimized operation method of the waste humidified hot air full heat recovery system in this example is given in the form of a flow block diagram in Fig. 2, that is, a waste heat and hot air full heat recovery method.
  • the method can achieve the purpose of dehumidifying and cooling the working environment and supplying constant pressure hot water to the washing machine 2, and includes the following steps:
  • the water supply is delayed, and the water supply of the water pipe reduces the water temperature of the water tank to the set temperature and then supplies water, for example, the water level reaches the water level during the cooling process of the water inlet. If the upper limit and the temperature does not fall to the set temperature, the water supply is immediately provided; if there is a forced water supply request, the water is supplied immediately regardless of the temperature;
  • step 6 Judging the water pressure of the water outlet pipe of the water tank. If it is less than the set pressure, the frequency converter controls the constant pressure water pump to raise the pressure to the set value. If it is greater than the set water supply pressure, the inverter frequency reduction control constant pressure water pump will The pressure drops to the set value.
  • the water level of the sample tank in the above step 2) refers to the automatic measurement of the water level sensor.
  • the operation in step 3) is achieved by an electrically controlled electric valve.
  • step 4 if dehumidification is required separately, the compressor 33 may be intermittently started and stopped after the compressor 33 is started to heat exchange the surface of the evaporator 31.
  • the delay time is determined according to the speed at which the water in the water tank 4 is heated. The faster the heating speed, the shorter the delay time, and vice versa.
  • the temperature and humidity of the waste hot and humid air in the environment, the heat exchange efficiency of the evaporator 31 and the condenser 32, the performance of the compressor 33, the 7J position and the amount of water in the water tank 4, the water temperature of the tap water, the diameter of the water outlet pipe 44, and the like Both have an effect on the heating rate of the water in the water tank 4, so the delay time needs to be debugged on the field to determine the optimum value.
  • the power consumption required for the operation of the heat recovery unit 3 is about one-third to one-fifth of the heat energy absorbed by the evaporator 31, and the optimization work is performed.
  • the point is about one quarter of the heat absorbed by the evaporator;
  • the waste humidified hot air source is a steam drying machine 1, and the temperature of the waste hot humid gas discharged is in the range of 70 90 degrees Celsius, and the heat recovery unit 3 is heat recoverable.
  • the range covers this temperature range, and the optimized operating point corresponds to hot humid air at 80 degrees Celsius.
  • the hot water used in the washing machine 2 ranges from 30 to 60 degrees Celsius, and the optimum temperature is 55 degrees Celsius.
  • the tap water temperature before heating is generally lower than room temperature, which is usually 10 25 degrees Celsius.
  • the maximum temperature after heating by the condenser 32 is Raise to above 60 degrees Celsius.
  • the temperature of the water supply can be conveniently maintained at an optimum 55 degrees Celsius by selecting parameters such as the set temperature of the control system and the specifications of the compressor 33.
  • the relevant reference data for energy exchange is as follows: specific vaporization enthalpy per kilogram of saturated steam: 2675.71kJ/kg; specific heat capacity of water: 4.186kJ/(kg. °C); 1000 kilograms of saturated vapor phase becomes liquid water at 100 degrees Celsius After releasing the temperature to 80 degrees Celsius, the energy released is 766.48 kW.

Abstract

一种应用于相对封闭的高温高湿工作环境的废湿热空气全热回收系统和该系统的热回收方法,回收系统包括热回收机组(3)和热利用设备,热回收机组(3)包括设置在工作环境中的蒸发器(31)、与蒸发器(31)通过管道相连的冷凝器(32)和与蒸发器(31)和冷凝器(32)通过管道相连的压缩机(33),热利用设备包括与冷凝器(32)通过循环管道相连的水箱(4))和连接在水箱(4)的出水管路中的水输送设备(42)。该系统及方法可以有效回收废湿热空气的热量,节约能源。

Description

废湿热空气全热回收系统及方法 技术领域 本发明涉及一种空气全热回收系统及方法, 特别涉及一种可用于酒店洗衣房、 印染厂 等环境的废湿热空气全热回收系统及方法。
背景技术 在酒店洗衣房、 印染厂等处, 因为工作的需要, 经常需要用大量的热蒸汽来进行衣物、 纺织物等的烘千, 而且为了便于保证纺织物卫生, 常常要在一个相对封闭的环境中进行, 其通风、 散热的条件都不理想。 热蒸汽烘千衣物、 纺织物的过程, 使得上述工作环境容易 产生不利于工作人员的高温、 高湿状况, 需用空调机组制冷来进行降温、 除湿。 此外, 在 这些工作环境中, 还需要大量使用热水来洗涤衣物、 纺织物等, 又会单独造成相当大的能 量消耗。 因此, 希望出现一种既可以对废湿热气体进行回收, 消除工作环境的高温、 高湿, 又 可以利用废热的系统。
发明内容 本发明是为了克服上述现有技术中的缺陷, 提供一种废湿热空气全热回收系统及方 法。该系统可以有效收集在酒店洗衣房、印染厂等工作环境中排放的废湿热空气中的热能, 并将其全回收来对自来水进行加热, 进而提供给洗涤流程中使用, 起到节能降耗并对工作 场所空气降温、 除湿的作用。 为实现上述目的, 本发明提供如下技术方案: 一种废湿热空气全热回收系统, 应用于相对封闭的高温高湿工作环境, 包括热回收机 组和热利用设备, 所述热回收机组包括设置在工作环境中的蒸发器, 与所述蒸发器通过管 道相连的冷凝器, 以及与所述蒸发器和冷凝器通过管道相连的压缩机; 所述热利用设备包 括与所述冷凝器通过循环管道相连的水箱, 以及连接在所述水箱的出水管路中的水输送设 备; 其中, 所述水箱上还设置有可连接自来水管路的进水管和出水管。 进一步地, 所述热回收机组中还包括设置在所述蒸发器附近的循环风机, 以及与该循 环风机的出风口相连的送风管道。 该蒸发器用于使环境中的废湿热空气和该蒸发器中的制 冷剂进行热交换, 因此, 需要根据场地的实际条件来确定其安装位置。 所述循环风机是为 了使经过和蒸发器换热后的空气被输送到送风管道中, 因此, 该循环风机的安装需要根据 场地上的安装条件、 气流走向、 风机的规格以及送风管道的位置等实际条件来确定一个在 所述蒸发器附近的合适位置。 进一步地, 所述热利用设备还包括作为热使用设备的洗衣机, 洗衣机本身具有水加热 并保持水温功能, 该热使用设备连接在所述水输送设备的下游。 进一步地, 所述水箱与所述冷凝器之间的循环管道中设置有冷却热水泵。 进一步地, 所述水输送设备包括连接在所述水箱的出水管路中的恒压水泵, 检测所述 水箱的出水管路中压力的压力传感器, 检测所述水箱的出水管路中水温的温度传感器, 以 及控制所述恒压水泵动作的变频器。 进一步地, 所述废湿热空气全热回收系统还包括检测工作环境中温度和湿度的多个温 湿度传感器, 以及与所述多个温湿度传感器通讯连接的控制单元; 并且, 所述控制单元还 与所述压力传感器和所述温度传感器通讯连接, 与所述冷却热水泵和所述变频器均电连 接, 根据所述多个温湿度传感器和所述温度传感器的检测信号控制所述冷却热水泵的动 作, 根据所述温度传感器和所述压力传感器的检测信号控制所述变频器的动作。 进一步地, 所述控制单元是具有触摸屏的人机交互式 PLC控制器、单片机控制器或其 它电脑控制系统中的一种。 一种废湿热空气全热回收方法, 包括如下步骤:
1 )开机, 系统各状态寄存器初始化;
2 )釆样水箱水位、 水箱温度, 以及工作环境空调的温度和湿度, 系统各设备状态寄 存器置位;
3 )判断水箱的水位是否达到设定的最低水位, 若低于最低水位则起动补水操作将水 位补充至设定水位;
4 )环境温度、 湿度达到请求降温、 除湿所设定值时顺序启动冷却热水泵、 循环风机、 压缩机;
5 )分别判断水箱温度与供水设定温度的关系, 包括: 5.1 )判断水箱温度与供水设定水温的关系, 若小于设定的水温, 则根据热使用 设备是否发出用 7j请求和热回收机组是否处于工作状态,同时还检测热使用设备是否 有强制用水请求, 若热回收机组处于工作状态, 同时无强制用水请求, 则等待水温至 设定温度再行供水, 若有强制供水请求则立即供水; 若热回收机组不处于工作状态, 则立即或经延迟时间后供水;
5.2 )若水箱的水温在设定范围内出现用 7j请求, 则立即供水;
5.3 )若水箱的水温高于设定温度, 并且无强制用水请求, 则延迟供水, 同时自 来水管进水将水箱水温降至设定温度后供水,如在进水降温过程中水位达到 7j位上限 而温度未降到设定温度时, 则立即供水; 如果存在强制供水请求则不管处于什么温度 都立即供水;
6 )判断水箱出水管的水压, 若小于设定的压力则变频器升频控制恒压水泵将压力提 升至设定值, 若大于设定的供水压力则变频器降频控制恒压水泵将压力降至设定值。 与现有技术相比, 本发明具有如下有益效果:
1、 蒸发器可以使工作场地中的废湿热空气和蒸发器内的制冷剂进行有效地热交换, 从而使高温、 高湿空气在降温和除湿的过程中所包含的全热被制冷剂所吸收, 达到给工作 场地降温、 除湿的同时还可以回收热量的效果。
2、 制冷剂经过压缩机的压缩后进入冷凝器中, 释放其从蒸发器处吸收的热量; 而冷 凝器与水箱通过循环管道相连, 可以方便地利用制冷剂释放的热量对水箱中的水进行加 热, 从而达到废热利用的效果。
3、 循环风机和送风管道可以将经过降温除湿处理后的空气送入到工作场所内部的指 定位置, 有效地实现对工作环境降温除湿的效果。
4、 冷却热水泵可以使水箱中的水充分地供应到冷凝器处, 从而在有效实现对水的加 热的同时, 还可以避免冷凝器中的热量不能及时被传递出去而造成过热。
5、 恒压水泵在变频器的控制下可以实现对水箱出水管道中水压的控制, 根据使用的 要求预先设定标准水压 , 当水箱出 7j压力低于该设定水压时, 变频器可以升频以控制恒压 水泵提高出水压力至设定水压; 当水箱出水压力高于该设定水压时, 变频器降频以控制恒 压水泵降低出 7j压力至设定水压, 从而保证水箱向热使用设备供应的热水压力恒定。
6、 釆用 PLC、 单片机或者电脑作为控制单元, 可以实现对多个传感器数据的及时釆 样和判断处理, 其釆样频率高、 控制精确, 能够保证整个系统的运转平稳, 同时还可以通 过预先编制的程序来方便地对水温、 7J压等数值进行设定和调整, 从而提高本发明的对不 同工作环境和要求的适应性, 确保系统工作在最佳状态。
7、 设置在水箱上的排污口平时关闭, 需要清污时打开, 可以便于水箱的清洗和检修。
附图说明 图 1是本发明的废湿热空气全热回收系统结构示意图; 图 2是本发明的操作方法流程框图。 结合附图在其上标记以下附图标记:
1-蒸汽烘千机, 2-洗衣机, 3-热回收机组, 31-蒸发器, 32-冷凝器, 33-压缩机, 34-循 环风机, 4-水箱, 41-冷却热水泵, 42-水输送设备, 421-恒压水泵, 422-压力传感器, 423- 温度传感器, 43-进水管, 44-出水管, 45-排污口, 5-送风管道。
具体实施方式 下面结合附图, 对本发明的优选具体实施方式进行详细描述, 但应当理解本发明的保 护范围并不受具体实施方式的限制。 一种废湿热空气全热回收系统, 应用于相对封闭的高温高湿工作环境, 如图 1所示, 包括热回收机组 3和热利用设备。 所述热回收机组 3包括设置在工作环境中的蒸发器 31 , 与所述蒸发器 31通过管道相连的冷凝器 32, 以及与所述蒸发器 31和冷凝器 32通过管道 相连的压缩机 33。 在蒸发器 31、 冷凝器 32和压缩机 33中使用制冷剂, 例如常见的氟利 昂、 氨、 丙烷、 乙烯等物盾, 作为冷媒。 所述热回收机组 3中还包括设置在所述蒸发器 31 附近的循环风机 34, 以及与该循环风机 34的出风口相连的给工作环境降温除湿的空调送 风管道 5 , 该送风管道 5上设置有多个向工作环境内送风的出风口, 图 1中示意性地画出 了三个。 蒸发器 31用于使环境中的废湿热空气和制冷剂进行热交换, 因此, 需要根据场 地的实际条件来确定其安装位置, 选择既有利于热交换, 又不会影响其他设备的安置和操 作的位置。 所述循环风机 34是为了使和蒸发器 31换热后的空气被输送到送风管道 5中, 因此, 该循环风机 34的安装需要根据场地上的安装条件、 气流走向、 风机的规格以及送 风管道 5的位置等实际条件来确定一个在所述蒸发器 31附近的合适位置, 以便获得良好 的排风效果。 热回收机组 3的工作原理如下: 压缩机 33将低压蒸汽状态下的制冷剂压缩为高压蒸 汽,高压蒸汽排至冷凝器 32中,冷凝器 32的外部散热表面与水箱 4中的水进行热交换(即 冷凝器 32中的高压蒸汽放热后凝结成高压液体, 同时水箱 4中的自来水吸热形成供热利 用设备使用的热水); 冷凝器 32中的高压液体进一步进入蒸发器 31 , 此时蒸发器 31与来 自工作环境中的废湿热空气进行热交换(即进入蒸发器 31中的前述高压液体在蒸发器 31 内的低压状态下蒸发吸热, 同时流经蒸发器 31表面的废湿热空气被降温、 除湿后再经循 环风机 34的作用进入送风管道 5 , 最后回流至工作环境)。 整个系统将废湿热空气在蒸发 器 31的表面降温、 凝结成水、 再将整个降温过程中吸收的热量供热利用系统的水加热使 用, 有效地实现了能量的回收利用, 同时空气的温度和湿度均有明显下降。 通过合理选择 各个设备的规格, 并在现场调试的基础上优化控制方法和参数设置, 可以使上述工作环境 中的空气温度控制在 26~28摄氏度, 湿度控制在 55%~65%。 所述热利用设备包括与所述冷凝器 32通过循环管道相连的水箱 4, 以及连接在所述水 箱 4的出水管路中的水输送设备 42; 其中, 所述水箱的容积满足每班全热吸收并且无用水 请求的状态,水箱 4上还设置有可连接自来水管路的进水管 43、 出水管 44以及排污口 45。 本例中的外部用 7J设备为洗衣机 2, 洗衣机 2本身具有水加热并保持水温功能, 连接在所 述水输送设备 42的下游。 所述循环管道包括一根从冷凝器 32向水箱 4输水的管道和一根 从水箱 4向冷凝器 32输水的管道, 在从水箱 4向冷凝器 32输水的管道中设置有冷却热水 泵 41。 当该冷却热水泵 41工作时, 可以保证水箱 4向冷凝器 32的供水量。 所述水输送设 备 42包括连接在所述水箱 4的出水管路中的恒压水泵 421 ,检测所述水箱 4的出水管路中 压力的压力传感器 422, 检测所述水箱 4的出水管路中水温的温度传感器 423 , 以及控制 所述恒压水泵 421动作的变频器(未图示)。 该变频器可以控制所述恒压水泵 421的输出 压力, 变频器根据压力传感器 422的数值变化情况调整频率使得出水管路中恒压水泵 421 的下游水压保持恒定, 该恒压水泵 421的下游管道与所述洗衣机 2连接。 压力传感器 422 的数值与最佳水箱水位、变频器设定的最佳频率相对应, 当洗衣机 2向水箱 4请求供水时, 水箱 4的水位变化时压力传感器 422同时检测相应的变化。 变频器 据压力传感器 422的 数值变化控制频率的输出, 当 7J压低于设定值时变频器升频, 当出水管路中的水压高于恒 压水泵 421的设定工作压力时变频器降频, 以控制恒压水泵 421输出的水压恒定。 所述废湿热空气全热回收系统还包括检测工作环境中温度和湿度的多个温湿度传感 器(未图示), 以及与所述多个温湿度传感器通讯连接的控制单元(未图示); 并且, 所述 控制单元还与所述压力传感器 422和所述温度传感器 423通讯连接,与所述冷却热水泵 41 和所述变频器均电连接, 根据所述多个温湿度传感器和所述温度传感器 423的检测信号控 制所述冷却热水泵 41的动作, 根据所述温度传感器 423和所述压力传感器 422的检测信 号控制所述变频器的动作。优选地,所述控制单元是具有触摸展的人机交互式 PLC控制器、 单片机控制器或其它电脑控制系统中的一种。 图 2中用流程框图的形式给出了本例中废湿热空气全热回收系统的优化操作方法, 即 一种废湿热空气全热回收方法。 该方法可以实现对工作环境的除湿降温和向洗衣机 2供应 恒压热水的目的, 包括如下步骤:
1 )开机, 系统各状态寄存器初始化;
2 )釆样水箱水位、 水箱温度, 以及工作环境空调的温度和湿度, 系统各设备状态寄 存器置位;
3 )判断水箱的水位是否达到设定的最低水位, 若低于最低水位则起动补水操作将水 位补充至设定水位;
4 )环境温度、 湿度达到请求降温、 除湿所设定值时顺序启动冷却热水泵、 循环风机、 压缩机, 并且冷却热水泵、 循环风机状态寄存器置位开机状态;
5 )分别判断水箱温度与供水设定温度的关系, 包括:
5.1 )判断水箱温度与供水设定水温的关系, 若小于设定的水温, 则根据热使用 设备是否发出用 7J请求和热回收机组是否处于工作状态,同时还检测热使用设备是否 有强制用水请求, 若热回收机组处于工作状态, 同时无强制用水请求, 则等待水温至 设定温度再行供水, 若有强制供水请求则立即供水; 若热回收机组不处于工作状态, 则立即或经延迟时间 (图中未示出)后供水;
5.2 )若水箱的水温在设定范围内出现用 7j请求, 则立即供水;
5.3 )若水箱的水温高于设定的输出温度, 并且无强制用水请求, 则延迟供水, 同时自来水管进水将水箱水温降至设定温度后供水,如在进水降温过程中水位达到水 位上限而温度未降到设定温度时, 则立即供水; 如果存在强制供水请求则不管处于什 么温度都立即供水;
6 )判断水箱出水管的水压, 若小于设定的压力则变频器升频控制恒压水泵将压力提 升至设定值, 若大于设定的供水压力则变频器降频控制恒压水泵将压力降至设定值。 具体地, 在上述步骤 2 ) 中的釆样水箱水位, 是指水位传感器自动测量。 在步骤 3 ) 中的操作是通过自动控制的电阀门来实现的。 在步骤 4 ) 中, 如果需要单独进行除湿, 则 可以在启动压缩机 33后对压缩机 33进行间歇性启停控制, 以使蒸发器 31表面的热交换 间歇性地进行, 这样可以使空气中的一部分蒸汽凝结为液态水, 降低空气湿度, 同时还可 以避免温度降低幅度过大。 压缩机 33间歇性启动的时间间隔越长, 则温度降低越不明显, 但是除湿效果也相应地变差; 时间间隔越短 , 则降温效果和除湿效果都会提高。 实际使用 中, 需要根据现场的空气湿度和对除湿的要求来调试压缩机 33的启停间隔, 以得到一个 合适的除湿效果。 如果是需要降温或降温和除湿同时进行, 则直接使压缩机 33—直保持 运转既可, 直至达到合适的温度为止。 在步骤 5.1 ) 中, 所述延迟时间要根据水箱 4中的 水被加热的速度来确定, 加热速度越快, 则延时时间越短, 反之延时时间越长。 由于环境 中的废湿热空气的温湿度、 蒸发器 31和冷凝器 32的热交换效率、 压缩机 33的性能、 水 箱 4中的 7J位和水量、 自来水的水温、 出水管 44的管径等参数均对水箱 4中的水的加热 速度有影响, 因此, 该延时时间需要在场地上调试后才能确定最佳数值。 需要理解的是, 在上述方法中所涉及的对温度、 湿度和压力的判断步骤在整个系统的 运行过程中是随时都在进行的, 而不是一次判断之后就停止。 这样持续性的判断, 其好处 是可以及时检测到系统运行中的各个参数变化, 并使控制单元及时作出响应, 从而使水箱 4输出的水能够保持水温、 7J压近似恒定。 釆用 PLC控制器、 单片机控制器或电脑控制系 统中的任一种作为控制单元都可以通过编制程序来满足这种随时进行参数判断的技术要 求。 经测算, 本实施例的系统和方法结合使用有如下效果: 上述热回收机组 3工作所需的 动力能耗约为蒸发器 31所吸收的热能的三分之一至五分之一, 优化工作点约在蒸发器吸 收热量的四分之一左右; 所述的废湿热空气源为蒸汽烘千机 1 , 其排放的废湿热气体的温 度范围在 70 90摄氏度, 热回收机组 3的热可回收范围涵盖此温度范围, 优化工作点对应 于 80摄氏度的湿热空气。 洗衣机 2所使用的热水范围大约在 30~60摄氏度, 最佳温度在 55摄氏度, 加热前的自来水温度一般低于室温, 常见的为 10 25摄氏度, 经过冷凝器 32 加热后的最高温度则会升高到 60摄氏度以上。 根据实际的热水用量, 通过选择控制系统 的设定温度和压缩机 33的规格等参数就可以方便地使供水水温保持在最佳的 55摄氏度。 有关的能量交换的参考数据如下:每千克饱和蒸汽的比汽化焓: 2675.71kJ/kg;水的比热容: 4.186kJ/(kg. °C); 1000千克饱和的蒸汽相变为 100摄氏度的液态水后再降温至 80摄氏度所 释放的能量为 766.48kW。 以上公开的仅为本发明较优的具体实施例, 但是, 本发明并非局限于此, 任何本领域 的技术人员能思之的变化都应落入本发明的保护范围。

Claims

权利 要求 书
1. 一种废湿热空气全热回收系统, 应用于相对封闭的高温高湿工作环境, 包括热回收 机组和热利用设备, 其特征在于: 所述热回收机组包括设置在工作环境中的蒸发器, 与所 述蒸发器通过管道相连的冷凝器, 以及与所述蒸发器和冷凝器通过管道相连的压缩机; 所述热利用设备包括与所述冷凝器通过循环管道相连的水箱, 以及连接在所述水箱的 出水管路中的水输送设备; 其中, 所述水箱上还设置有可连接自来水管路的进水管和出水管。
2. 根据权利要求 1所述的废湿热空气全热回收系统, 其特征在于: 所述热回收机组中 还包括设置在所述蒸发器附近的循环风机, 以及与该循环风机的出风口相连的送风管道。
3. 根据权利要求 1或 2所述的废湿热空气全热回收系统, 其特征在于: 所述热利用设 备还包括作为热使用设备的洗衣机, 洗衣机本身具有水加热并保持水温功能, 该热使用设 备连接在所述水输送设备的下游。
4. 根据权利要求 1或 2所述的废湿热空气全热回收系统, 其特征在于: 所述水箱与所 述冷凝器之间的循环管道中设置有冷却热水泵。
5. 根据权利要求 4所述的废湿热空气全热回收系统, 其特征在于: 所述水输送设备包 括连接在所述水箱的出水管路中的恒压水泵, 检测所述水箱的出水管路中压力的压力传感 器,检测所述水箱的出水管路中水温的温度传感器,以及控制所述恒压水泵动作的变频器。
6. 根据权利要求 5所述的废湿热空气全热回收系统, 其特征在于: 还包括检测工作环 境中温度和湿度的多个温湿度传感器, 以及与所述多个温湿度传感器通讯连接的控制单 元; 并且, 所述控制单元还与所述压力传感器和所述温度传感器通讯连接 , 与所述冷却热水泵和 所述变频器均电连接, 根据所述多个温湿度传感器和所述温度传感器的检测信号控制所述 冷却热水泵的动作, 根据所述温度传感器和所述压力传感器的检测信号控制所述变频器的 动作。
7. 根据权利要求 6所述的废湿热空气全热回收系统, 其特征在于: 所述控制单元是具 有触摸展的人机交互式 PLC控制器、 单片机控制器或其它电脑控制系统中的一种。
8. 一种废湿热空气全热回收方法, 其特征在于, 包括如下步骤:
1 )开机, 系统各状态寄存器初始化;
2 )釆样水箱水位、 水箱温度, 以及工作环境空调的温度和湿度, 系统各设备状态寄 存器置位;
3 )判断水箱的水位是否达到设定的最低水位, 若低于最低水位则起动补水操作将水 位补充至设定水位;
4 )环境温度、 湿度达到请求降温、 除湿所设定值时顺序启动冷却热水泵、 循环风机、 压缩机;
5 )分别判断水箱温度与供水设定温度的关系, 包括:
5.1 )判断水箱温度与供水设定水温的关系, 若小于设定的水温, 则根据热使用 设备是否发出用 7j请求和热回收机组是否处于工作状态,同时还检测热使用设备是否 有强制用水请求, 若热回收机组处于工作状态, 同时无强制用水请求, 则等待水温至 设定温度再行供水, 若有强制供水请求则立即供水; 若热回收机组不处于工作状态, 则立即或经延迟时间后供水;
5.2 )若水箱的水温在设定范围内出现用 7j请求, 则立即供水;
5.3 )若水箱的水温高于设定温度, 并且无强制用水请求, 则延迟供水, 同时自 来水管进水将水箱水温降至设定温度后供水,如在进水降温过程中水位达到 7j位上限 而温度未降到设定温度时, 则立即供水; 如果存在强制供水请求则不管处于什么温度 都立即供水;
6 )判断水箱出水管的水压, 若小于设定的压力则变频器升频控制恒压水泵将压力提 升至设定值, 若大于设定的供水压力则变频器降频控制恒压水泵将压力降至设定值。
PCT/CN2012/074714 2011-08-18 2012-04-26 废湿热空气全热回收系统及方法 WO2013023459A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110238148.5 2011-08-18
CN201110238148.5A CN102384606B (zh) 2011-08-18 2011-08-18 废湿热空气全热回收系统及方法

Publications (1)

Publication Number Publication Date
WO2013023459A1 true WO2013023459A1 (zh) 2013-02-21

Family

ID=45824263

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/074714 WO2013023459A1 (zh) 2011-08-18 2012-04-26 废湿热空气全热回收系统及方法

Country Status (2)

Country Link
CN (1) CN102384606B (zh)
WO (1) WO2013023459A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109347307A (zh) * 2018-10-31 2019-02-15 中冶焦耐(大连)工程技术有限公司 一种用于高压变频器柜高效冷却的系统及方法
CN111998575A (zh) * 2020-09-16 2020-11-27 中煤科工(天津)清洁能源研究院有限公司 洗浴废水余热回收系统
CN113183791A (zh) * 2021-04-01 2021-07-30 南京能瑞电力科技有限公司 一种充电桩的散热管理系统控制方法及散热管理系统
CN117750708A (zh) * 2023-11-16 2024-03-22 东莞市粤湾新能源有限公司 一种高压变频器用水源冷却机组节能降温系统及使用方法

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102384606B (zh) * 2011-08-18 2014-08-13 宁波惠康实业有限公司 废湿热空气全热回收系统及方法
CN104596006B (zh) * 2015-01-15 2017-06-20 王全龄 一种生活热水和游泳池余热综合加热系统
US10285562B2 (en) * 2015-07-31 2019-05-14 Illinois Tool Works Inc. Warewasher with heat recovery system
CN107964775B (zh) * 2017-11-10 2019-05-03 珠海格力电器股份有限公司 一种洗衣房余热回收的供热系统及方法
CN107841810A (zh) * 2017-12-06 2018-03-27 宁波大发化纤有限公司 一种节能型三维纤维产品松弛热定型机
CN107858761A (zh) * 2017-12-06 2018-03-30 宁波大发化纤有限公司 一种节能型二维纤维产品松弛热定型机
CN109579182A (zh) * 2018-12-04 2019-04-05 珠海格力电器股份有限公司 家用电器
CN111797525B (zh) * 2020-06-03 2021-07-30 中国南方电网有限责任公司超高压输电公司广州局 一种管道压力控制方法及系统
CN114150466B (zh) * 2021-11-17 2023-10-20 江苏弗莱明恩环境科技有限公司 用于洗涤的节能环保型清洗熨烫烘干一体化设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002130819A (ja) * 2000-10-30 2002-05-09 Matsushita Electric Ind Co Ltd ヒートポンプ式給湯システム
JP2005069608A (ja) * 2003-08-26 2005-03-17 Matsushita Electric Works Ltd 温水利用システム
WO2006101405A2 (en) * 2005-03-23 2006-09-28 Kjell Emil Eriksen A system for utalization of renewable energy sources
CN201199106Y (zh) * 2008-04-30 2009-02-25 陈万仁 低压蒸汽和余热的利用系统
CN101922781A (zh) * 2010-07-28 2010-12-22 重庆市同方科技发展有限公司 基于被控环境温度湿度调节的空调节能控制方法及系统
CN102384606A (zh) * 2011-08-18 2012-03-21 宁波惠康实业有限公司 废湿热空气全热回收系统及方法
CN202195623U (zh) * 2011-08-18 2012-04-18 宁波惠康实业有限公司 废湿热空气全热回收系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366677A (en) * 1981-06-22 1983-01-04 Atlantic Richfield Company Heat pump water heater with remote storage tank and timed temperature sensing
KR101067963B1 (ko) * 2004-07-08 2011-09-26 엘지전자 주식회사 세탁기의 급수 제어장치 및 방법
CN1948853A (zh) * 2006-09-11 2007-04-18 张斗庆 利用余热制备热水的热泵系统及其使用方法
CN201028886Y (zh) * 2007-04-26 2008-02-27 江苏格朗灵空调有限公司 一种能量再利用及节能型冷热水机系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002130819A (ja) * 2000-10-30 2002-05-09 Matsushita Electric Ind Co Ltd ヒートポンプ式給湯システム
JP2005069608A (ja) * 2003-08-26 2005-03-17 Matsushita Electric Works Ltd 温水利用システム
WO2006101405A2 (en) * 2005-03-23 2006-09-28 Kjell Emil Eriksen A system for utalization of renewable energy sources
CN201199106Y (zh) * 2008-04-30 2009-02-25 陈万仁 低压蒸汽和余热的利用系统
CN101922781A (zh) * 2010-07-28 2010-12-22 重庆市同方科技发展有限公司 基于被控环境温度湿度调节的空调节能控制方法及系统
CN102384606A (zh) * 2011-08-18 2012-03-21 宁波惠康实业有限公司 废湿热空气全热回收系统及方法
CN202195623U (zh) * 2011-08-18 2012-04-18 宁波惠康实业有限公司 废湿热空气全热回收系统

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109347307A (zh) * 2018-10-31 2019-02-15 中冶焦耐(大连)工程技术有限公司 一种用于高压变频器柜高效冷却的系统及方法
CN109347307B (zh) * 2018-10-31 2024-03-19 中冶焦耐(大连)工程技术有限公司 一种用于高压变频器柜高效冷却的系统及方法
CN111998575A (zh) * 2020-09-16 2020-11-27 中煤科工(天津)清洁能源研究院有限公司 洗浴废水余热回收系统
CN113183791A (zh) * 2021-04-01 2021-07-30 南京能瑞电力科技有限公司 一种充电桩的散热管理系统控制方法及散热管理系统
CN117750708A (zh) * 2023-11-16 2024-03-22 东莞市粤湾新能源有限公司 一种高压变频器用水源冷却机组节能降温系统及使用方法

Also Published As

Publication number Publication date
CN102384606B (zh) 2014-08-13
CN102384606A (zh) 2012-03-21

Similar Documents

Publication Publication Date Title
WO2013023459A1 (zh) 废湿热空气全热回收系统及方法
US9487910B2 (en) Clothes dryer and control method thereof
CN105021013B (zh) 一种带显热回收和多效除湿功能的热泵干燥系统
CN106679002B (zh) 一种冷凝除湿与溶液除湿复合的新风处理装置及方法
CN102679547B (zh) 空气能干衣热水器
CN102677441B (zh) 一种热泵干衣机控制方法及热泵干衣机
WO2018040936A1 (zh) 热泵干衣设备控制方法
EP3346046B1 (en) High efficiency vented clothes dryer having heat pump system
CN105276787B (zh) 空调冷凝水处理方法和处理装置
CN107575991B (zh) 一种热泵型空调器制热模式控制方法
JP2013164191A (ja) 浴室暖房乾燥機
CN203534006U (zh) 一种空调系统
CN105180317A (zh) 一种温湿度独立处理空调系统中新风节能处理系统以及方法
KR20110019095A (ko) 에너지절약형 대형 의류 건조기
CN103968658A (zh) 一种空气源热泵水循环加热及水循环冷凝除湿烘干装置
CN111059726A (zh) 一种除湿机的控制方法、装置、存储介质及除湿机
CN204853780U (zh) 一种温湿度独立处理空调系统中新风节能处理系统
CN111270467B (zh) 一种衣物处理设备及控制方法
CN201722536U (zh) 干衣机
CN109855255B (zh) 一种空调器的控制方法、系统及空调器
CN202195623U (zh) 废湿热空气全热回收系统
CN113623993B (zh) 一种载冷循环热回收高温烘干装置及控制方法
CN106765965A (zh) 分流式水冷型恒温恒湿空调机的控制方法
WO2016019690A1 (zh) 水泵控制方法
CN102563768B (zh) 节能型恒温恒湿空调装置

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: 12824422

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: 12824422

Country of ref document: EP

Kind code of ref document: A1