CN106679188A - Water-saving intelligent temperature-control water heater based on PID adjustment and method thereof - Google Patents

Water-saving intelligent temperature-control water heater based on PID adjustment and method thereof Download PDF

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CN106679188A
CN106679188A CN201710028097.0A CN201710028097A CN106679188A CN 106679188 A CN106679188 A CN 106679188A CN 201710028097 A CN201710028097 A CN 201710028097A CN 106679188 A CN106679188 A CN 106679188A
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water
hot water
storage tank
temperature
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邵成武
郑太英
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • 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
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021—Storage heaters
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
    • G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Control Of Temperature (AREA)

Abstract

本发明公开了一种基于PID调节的节水型智能温控热水器及其方法，包括热水箱外壳、储水单元、中枢控制单元、交互单元、输送单元、检测单元、流向单元、加热单元、动力单元；热水箱外壳采用丙烯腈‑丁二烯‑苯乙烯共聚物材料；所述的交互单元设置在热水箱外壳上；所述的加热单元设置在储水单元内，所述的流向单元、动力单元设置在输送单元内；所述的储水单元、输送单元、中枢控制单元、检测单元设置在热水箱外壳内；储水单元与输送单元互联，中枢控制单元与加热单元、检测单元，交互单元、流向单元相连，检测单元分别与储水单元、输送单元相连。本发明使用时水温调节方便，使用过程中的温度和流量稳定。

The invention discloses a water-saving intelligent temperature-controlled water heater based on PID adjustment and a method thereof, comprising a hot water tank shell, a water storage unit, a central control unit, an interaction unit, a delivery unit, a detection unit, a flow direction unit, a heating unit, Power unit; the shell of the hot water tank is made of acrylonitrile-butadiene-styrene copolymer; the interactive unit is set on the shell of the hot water tank; the heating unit is set in the water storage unit, and the flow direction The unit and the power unit are arranged in the conveying unit; the water storage unit, the conveying unit, the central control unit and the detection unit are arranged in the shell of the hot water tank; the water storage unit is interconnected with the conveying unit, and the central control unit is connected with the heating unit, detection The unit, the interaction unit and the flow direction unit are connected, and the detection unit is connected with the water storage unit and the delivery unit respectively. When the invention is used, the water temperature can be adjusted conveniently, and the temperature and the flow rate during the use are stable.

Description

一种基于PID调节的节水型智能温控热水器及其方法A water-saving intelligent temperature-controlled water heater based on PID regulation and its method

技术领域technical field

本发明属于日常生活的热水器领域，具体涉及一种基于PID调节的节水型智能温控热水器及其方法。The invention belongs to the field of water heaters for daily life, and in particular relates to a water-saving intelligent temperature-controlled water heater based on PID regulation and a method thereof.

背景技术Background technique

当前市面上的热水器大多存在两个问题，一是调节水温不方便，二是使用过程中的温度会发生变化。人们使用热水器的时候会有多种用途，比如洗澡，洗头，洗脚，很难将当前热水器调节到准确的温度，而且不存在记忆功能，即使用户使用热水器的同一功能也需要每次对热水温度进行调节。二是使用的过程中温度会发生变化，因为热水的温度会存在变化，对用户使用的舒适感造成不好的影响。Most of the water heaters currently on the market have two problems. One is that it is inconvenient to adjust the water temperature, and the other is that the temperature will change during use. People use water heaters for multiple purposes, such as bathing, shampooing, and foot washing. It is difficult to adjust the current water heater to an accurate temperature, and there is no memory function. Water temperature is adjusted. The second is that the temperature will change during use, because the temperature of the hot water will change, which will have a bad impact on the comfort of the user.

发明内容Contents of the invention

本发明的目的是克服现有技术的不足，提供了一种基于PID调节的节水型智能温控热水器及其方法。The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a water-saving intelligent temperature-controlled water heater based on PID regulation and a method thereof.

本发明的技术方案如下：Technical scheme of the present invention is as follows:

一种基于PID调节的节水型智能温控热水器包括：A water-saving intelligent temperature-controlled water heater based on PID regulation includes:

热水箱外壳、储水单元、中枢控制单元、交互单元、输送单元、检测单元、流向单元、加热单元、动力单元；Hot water tank shell, water storage unit, central control unit, interaction unit, delivery unit, detection unit, flow direction unit, heating unit, power unit;

所述的热水箱外壳采用丙烯腈-丁二烯-苯乙烯共聚物材料；所述的交互单元设置在热水箱外壳上；所述的加热单元设置在储水单元内，所述的流向单元、动力单元设置在输送单元内；所述的储水单元、输送单元、中枢控制单元、检测单元设置在热水箱外壳内；储水单元与输送单元互联，中枢控制单元与加热单元、检测单元，交互单元、流向单元相连，检测单元分别与储水单元、输送单元相连。The shell of the hot water tank is made of acrylonitrile-butadiene-styrene copolymer; the interactive unit is arranged on the shell of the hot water tank; the heating unit is set in the water storage unit, and the flow direction The unit and the power unit are arranged in the delivery unit; the water storage unit, the delivery unit, the central control unit and the detection unit are arranged in the shell of the hot water tank; The unit, the interaction unit and the flow direction unit are connected, and the detection unit is connected with the water storage unit and the delivery unit respectively.

优选的，所述的输送单元为PVC管道。所述的流向单元为电子阀门。Preferably, the delivery unit is a PVC pipe. The flow direction unit is an electronic valve.

优选的，所述的储水单元为三个储水箱和两个混合池；三个储水箱包括热水储水箱、回流水储水箱、出水储水箱；两个混合池包括一号混合池和二号混合池；热水储水箱通过输送单元、流向单元再与一号混合池相连；一号混合池通过流向单元与二号混合池相连；二号混合池通过输送单元、流向单元分别与回流水储水箱、出水储水箱相连；回流水储水箱通过动力单元、输送单元、流向单元与热水储水箱相连；热水储水箱、一号混合池、出水储水箱通过输送单元、流向单元与外界连接；热水储水箱的外壳采用内部填塞海绵的双层丙烯腈-丁二烯-苯乙烯共聚物材料外壳。Preferably, the water storage unit is three water storage tanks and two mixing pools; the three water storage tanks include hot water storage tanks, return water storage tanks, and outlet water storage tanks; the two mixing pools include No. 1 mixing pool and No. 2 mixing pool No. 1 mixing tank; the hot water storage tank is connected to the No. 1 mixing tank through the delivery unit and the flow direction unit; the No. 1 mixing tank is connected to the No. 2 mixing tank through the flow direction unit; the No. 2 mixing tank is respectively connected to the return water through the delivery unit and the flow direction unit The water storage tank and the outlet water storage tank are connected; the return water storage tank is connected with the hot water storage tank through the power unit, the delivery unit, and the flow direction unit; the hot water storage tank, the No. 1 mixing pool, and the outlet water storage tank are connected with the outside world through the delivery unit and the flow direction unit ; The shell of the hot water storage tank is made of double-layer acrylonitrile-butadiene-styrene copolymer material shell filled with sponge.

优选的，所述的动力单元为水泵。Preferably, the power unit is a water pump.

优选的，所述的检测单元为温度传感器和液压传感器；温度传感器分别设置在热水储水箱、二号混合池以及一号混合池与外界相连的PVC管道内；液压传感器分别设置在热水储水箱、出水储水箱、回流储水箱内。Preferably, the detection unit is a temperature sensor and a hydraulic pressure sensor; the temperature sensors are respectively arranged in the hot water storage tank, the No. Water tank, outlet water storage tank and return water storage tank.

优选的，所述的交互单元为键盘、显示屏、按钮、指示灯和旋钮。Preferably, the interactive unit is a keyboard, a display screen, buttons, indicator lights and knobs.

优选的，所述的中枢控制单元为MSP430单片机及其外围电路。Preferably, the central control unit is an MSP430 single-chip microcomputer and its peripheral circuits.

优选的，所述的加热单元为金属管和开关电路；加热单元和中枢控制单元相连。Preferably, the heating unit is a metal tube and a switch circuit; the heating unit is connected to the central control unit.

所述的基于PID调节的节水型智能温控热水器的温控方法，其特征在于包括如下步骤：1)设备初始化The temperature control method of the water-saving intelligent temperature-controlled water heater based on PID regulation is characterized in that it includes the following steps: 1) device initialization

接通电源对加热单元、中枢控制单元、交互单元、动力单元、检测单元进行供电；通过按下按钮启动加热，通过键盘或者旋钮输入用户的设定值，设定值包括热水的温度和出水水流的大小，中枢控制单元进行工作；Turn on the power supply to supply power to the heating unit, central control unit, interactive unit, power unit, and detection unit; press the button to start heating, and input the user's set value through the keyboard or knob. The set value includes the temperature of hot water and the output water The size of the water flow, the central control unit works;

2)加热环节2) Heating link

中枢控制单元控制加热单元对热水储水箱内的水进行加热，MSP430单片机输出PWM波至加热单元的开关电路，控制开关电路的输出电压大小，PWM波的占空越大，输出电压越大；此输出电压加在金属管上，金属管发热给热水储水箱中的热水加热，电压越大加热的功率越大；热水储水箱内有的温度传感器和液压传感器将热水储水箱内的水量和热水的温度采集并传给MSP430单片机，当热水储水箱内水量过少则控制热水储水箱与外界相连的PVC管道上的电子阀门打开，流入冷水，当热水箱内水量过多则控制热水储水箱与外界相连的PVC管道上的电子阀门关闭；当判断出热水箱内水温升高到温度上限，则控制加热单元停止加热，当水箱内的温度降低到温度下限，则控制加热单元满功率加热，使得热水箱内的热水保持在合适的温度和水量；The central control unit controls the heating unit to heat the water in the hot water storage tank. The MSP430 microcontroller outputs PWM waves to the switching circuit of the heating unit to control the output voltage of the switching circuit. The larger the duty of the PWM wave, the larger the output voltage; This output voltage is applied to the metal tube, and the metal tube generates heat to heat the hot water in the hot water storage tank. The higher the voltage is, the greater the heating power is; The amount of water and the temperature of hot water are collected and transmitted to the MSP430 microcontroller. When the water in the hot water storage tank is too small, the electronic valve on the PVC pipe connecting the hot water storage tank to the outside is controlled to open and cold water flows in. When the water in the hot water tank If it is too much, the electronic valve on the PVC pipe connecting the hot water storage tank to the outside is controlled to close; when it is judged that the water temperature in the hot water tank rises to the temperature upper limit, the heating unit is controlled to stop heating, Lower limit, then control the heating unit to heat at full power, so that the hot water in the hot water tank can be kept at an appropriate temperature and water volume;

3)调节环节3) Adjustment link

每当用户输入其要求的水温t0和水流量c0时，单片机MSP430便能够读取到输入的值，热水储水箱内的温度传感器将热水的温度t1输入MSP430单片机，一号混合池与外界连通的PVC管道内的温度传感器将冷水t2的温度输入MSP430单片机，单片机根据这两个温度和用户设定的温度和水流量控制一号混合池与外界相连的PVC管道上电子阀门开度x1,热水储水箱与一号混合池相连的PVC管道上电子阀门开度x2，两个开度满足下列公式：Whenever the user inputs the required water temperature t0 and water flow c0, the single-chip microcomputer MSP430 can read the input value, and the temperature sensor in the hot water storage tank will input the hot water temperature t1 into the MSP430 single-chip microcomputer, No. 1 mixing pool and the outside world The temperature sensor in the connected PVC pipe inputs the temperature of the cold water t2 into the MSP430 single-chip microcomputer, and the single-chip microcomputer controls the opening of the electronic valve on the PVC pipe connected to the No. The opening of the electronic valve on the PVC pipe connecting the hot water storage tank to No. 1 mixing tank is x2, and the two openings satisfy the following formula:

求解可以得到 Solving can get

一号混合池是为了让热水和冷水充分混合，经过混合后的热水流入了二号混合池中，二号混合池内的温度传感器将二号混合池内热水的温度传给MSP430，当二号混合池内的热水温度与用户设定的温度相差在一定范围内，则MSP430控制二号混合池与出水储水箱相连的PVC管道上的电子阀门打开，使温度适宜的热水流入出水储水池，否则打开二号混合池与回流水储水箱相连的PVC管道上的电子阀门；当系统检测到当二号混合池内的热水温度与用户设定的温度相差超过一个较小的值，MSP430采用PID控制算法调节x1和x2,直到二号混合池内的热水温度与设定的温度差值在设定范围内；当MSP430通过储水箱内的液压传感器检测到其内水量达到设定值，便开始打开出水储水箱与外界相通的PVC管道上的电子阀门。The No. 1 mixing tank is to fully mix the hot water and cold water. The mixed hot water flows into the No. 2 mixing tank. The temperature sensor in the No. 2 mixing tank transmits the temperature of the hot water in the No. 2 mixing tank to MSP430. If the difference between the hot water temperature in the No. 2 mixing pool and the temperature set by the user is within a certain range, the MSP430 controls the opening of the electronic valve on the PVC pipe connecting the No. 2 mixing pool and the outlet water storage tank, so that hot water with a suitable temperature flows into the outlet water storage tank. , otherwise open the electronic valve on the PVC pipe connecting the No. 2 mixing tank to the return water storage tank; when the system detects that the difference between the hot water temperature in the No. The PID control algorithm adjusts x1 and x2 until the temperature difference between the hot water temperature in the No. 2 mixing tank and the set temperature is within the set range; when the MSP430 detects that the water volume in the water storage tank reaches the set value through the hydraulic sensor in the water storage tank, it will Start to open the electronic valve on the PVC pipeline that the water outlet water storage tank communicates with the outside world.

附图说明Description of drawings

图1为基于PID调节的节水型智能温控热水器的单元结构示意图。Figure 1 is a schematic diagram of the unit structure of a water-saving intelligent temperature-controlled water heater based on PID regulation.

具体实施方式detailed description

如图1所示，一种基于PID调节的节水型智能温控热水器包括：热水箱外壳、储水单元、中枢控制单元、交互单元、输送单元、检测单元、流向单元、加热单元、动力单元；As shown in Figure 1, a water-saving intelligent temperature-controlled water heater based on PID regulation includes: a hot water tank shell, a water storage unit, a central control unit, an interaction unit, a delivery unit, a detection unit, a flow direction unit, a heating unit, and a power unit. unit;

所述的热水箱外壳采用丙烯腈-丁二烯-苯乙烯共聚物材料；所述的交互单元设置在热水箱外壳上；所述的加热单元设置在储水单元内，所述的流向单元、动力单元设置在输送单元内；所述的储水单元、输送单元、中枢控制单元、检测单元设置在热水箱外壳内；储水单元与输送单元互联，中枢控制单元与加热单元、检测单元，交互单元、流向单元相连，检测单元分别与储水单元、输送单元相连。The shell of the hot water tank is made of acrylonitrile-butadiene-styrene copolymer; the interactive unit is arranged on the shell of the hot water tank; the heating unit is set in the water storage unit, and the flow direction The unit and the power unit are arranged in the delivery unit; the water storage unit, the delivery unit, the central control unit and the detection unit are arranged in the shell of the hot water tank; The unit, the interaction unit and the flow direction unit are connected, and the detection unit is connected with the water storage unit and the delivery unit respectively.

优选的，所述的输送单元为PVC管道。所述的流向单元为电子阀门。Preferably, the delivery unit is a PVC pipe. The flow direction unit is an electronic valve.

优选的，所述的储水单元为三个储水箱和两个混合池；三个储水箱包括热水储水箱、回流水储水箱、出水储水箱；两个混合池包括一号混合池和二号混合池；热水储水箱通过输送单元、流向单元再与一号混合池相连；一号混合池通过流向单元与二号混合池相连；二号混合池通过输送单元、流向单元分别与回流水储水箱、出水储水箱相连；回流水储水箱通过动力单元、输送单元、流向单元与热水储水箱相连；热水储水箱、一号混合池、出水储水箱通过输送单元、流向单元与外界连接；热水储水箱的外壳采用内部填塞海绵的双层丙烯腈-丁二烯-苯乙烯共聚物材料外壳。Preferably, the water storage unit is three water storage tanks and two mixing pools; the three water storage tanks include hot water storage tanks, return water storage tanks, and outlet water storage tanks; the two mixing pools include No. 1 mixing pool and No. 2 mixing pool No. 1 mixing tank; the hot water storage tank is connected to the No. 1 mixing tank through the delivery unit and the flow direction unit; the No. 1 mixing tank is connected to the No. 2 mixing tank through the flow direction unit; the No. 2 mixing tank is respectively connected to the return water through the delivery unit and the flow direction unit The water storage tank and the outlet water storage tank are connected; the return water storage tank is connected with the hot water storage tank through the power unit, the delivery unit, and the flow direction unit; the hot water storage tank, the No. 1 mixing pool, and the outlet water storage tank are connected with the outside world through the delivery unit and the flow direction unit ; The shell of the hot water storage tank is made of double-layer acrylonitrile-butadiene-styrene copolymer material shell filled with sponge.

优选的，所述的动力单元为水泵。Preferably, the power unit is a water pump.

优选的，所述的检测单元为温度传感器和液压传感器；温度传感器分别设置在热水储水箱、二号混合池以及一号混合池与外界相连的PVC管道内；液压传感器分别设置在热水储水箱、出水储水箱、回流储水箱内。Preferably, the detection unit is a temperature sensor and a hydraulic pressure sensor; the temperature sensors are respectively arranged in the hot water storage tank, the No. Water tank, outlet water storage tank and return water storage tank.

优选的，所述的交互单元为键盘、显示屏、按钮、指示灯和旋钮。Preferably, the interactive unit is a keyboard, a display screen, buttons, indicator lights and knobs.

优选的，所述的中枢控制单元为MSP430单片机及其外围电路。Preferably, the central control unit is an MSP430 single-chip microcomputer and its peripheral circuits.

优选的，所述的加热单元为金属管和开关电路；加热单元和中枢控制单元相连。Preferably, the heating unit is a metal tube and a switch circuit; the heating unit is connected to the central control unit.

所述的基于PID调节的节水型智能温控热水器的温控方法，其特征在于包括如下步骤：1)设备初始化The temperature control method of the water-saving intelligent temperature-controlled water heater based on PID regulation is characterized in that it includes the following steps: 1) device initialization

接通电源对加热单元、中枢控制单元、交互单元、动力单元、检测单元进行供电；通过按下按钮启动加热，通过键盘或者旋钮输入用户的设定值，设定值包括热水的温度和出水水流的大小，中枢控制单元进行工作；Turn on the power supply to supply power to the heating unit, central control unit, interactive unit, power unit, and detection unit; press the button to start heating, and input the user's set value through the keyboard or knob. The set value includes the temperature of hot water and the output water The size of the water flow, the central control unit works;

2)加热环节2) Heating link

中枢控制单元控制加热单元对热水储水箱内的水进行加热，MSP430单片机输出PWM波至加热单元的开关电路，控制开关电路的输出电压大小，PWM波的占空越大，输出电压越大；此输出电压加在金属管上，金属管发热给热水储水箱中的热水加热，电压越大加热的功率越大；热水储水箱内有的温度传感器和液压传感器将热水储水箱内的水量和热水的温度采集并传给MSP430单片机，当热水储水箱内水量过少则控制热水储水箱与外界相连的PVC管道上的电子阀门打开，流入冷水，当热水箱内水量过多则控制热水储水箱与外界相连的PVC管道上的电子阀门关闭；当判断出热水箱内水温升高到温度上限，则控制加热单元停止加热，当水箱内的温度降低到温度下限，则控制加热单元满功率加热，使得热水箱内的热水保持在合适的温度和水量；The central control unit controls the heating unit to heat the water in the hot water storage tank. The MSP430 microcontroller outputs PWM waves to the switching circuit of the heating unit to control the output voltage of the switching circuit. The larger the duty of the PWM wave, the larger the output voltage; This output voltage is applied to the metal tube, and the metal tube generates heat to heat the hot water in the hot water storage tank. The higher the voltage is, the greater the heating power is; The amount of water and the temperature of hot water are collected and transmitted to the MSP430 microcontroller. When the water in the hot water storage tank is too small, the electronic valve on the PVC pipe connecting the hot water storage tank to the outside is controlled to open and cold water flows in. When the water in the hot water tank If it is too much, the electronic valve on the PVC pipe connecting the hot water storage tank to the outside is controlled to close; when it is judged that the water temperature in the hot water tank rises to the temperature upper limit, the heating unit is controlled to stop heating, Lower limit, then control the heating unit to heat at full power, so that the hot water in the hot water tank can be kept at an appropriate temperature and water volume;

3)调节环节3) Adjustment link

每当用户输入其要求的水温t0和水流量c0时，单片机MSP430便能够读取到输入的值，热水储水箱内的温度传感器将热水的温度t1输入MSP430单片机，一号混合池与外界连通的PVC管道内的温度传感器将冷水t2的温度输入MSP430单片机，单片机根据这两个温度和用户设定的温度和水流量控制一号混合池与外界相连的PVC管道上电子阀门开度x1,热水储水箱与一号混合池相连的PVC管道上电子阀门开度x2，两个开度满足下列公式：Whenever the user inputs the required water temperature t0 and water flow c0, the single-chip microcomputer MSP430 can read the input value, and the temperature sensor in the hot water storage tank will input the hot water temperature t1 into the MSP430 single-chip microcomputer, No. 1 mixing pool and the outside world The temperature sensor in the connected PVC pipe inputs the temperature of the cold water t2 into the MSP430 single-chip microcomputer, and the single-chip microcomputer controls the opening of the electronic valve on the PVC pipe connected to the No. The opening of the electronic valve on the PVC pipe connecting the hot water storage tank to No. 1 mixing tank is x2, and the two openings satisfy the following formula:

求解可以得到 Solving can get

一号混合池是为了让热水和冷水充分混合，经过混合后的热水流入了二号混合池中，二号混合池内的温度传感器将二号混合池内热水的温度传给MSP430，当二号混合池内的热水温度与用户设定的温度相差在一定范围内，一般可取±1.5℃，则MSP430控制二号混合池与出水储水箱相连的PVC管道上的电子阀门打开，使温度适宜的热水流入出水储水池，否则打开二号混合池与回流水储水箱相连的PVC管道上的电子阀门；当系统检测到当二号混合池内的热水温度与用户设定的温度相差超过一个较小的值，一般为±0.2℃时，MSP430采用PID控制算法调节x1和x2,直到二号混合池内的热水温度与设定的温度差值在设定范围内；当MSP430通过储水箱内的液压传感器检测到其内水量达到设定值，便开始打开出水储水箱与外界相通的PVC管道上的电子阀门。The No. 1 mixing tank is to fully mix the hot water and cold water. The mixed hot water flows into the No. 2 mixing tank. The temperature sensor in the No. 2 mixing tank transmits the temperature of the hot water in the No. 2 mixing tank to MSP430. The difference between the temperature of the hot water in the No. 2 mixing pool and the temperature set by the user is within a certain range, generally ±1.5°C, then the MSP430 controls the opening of the electronic valve on the PVC pipe connecting the No. 2 mixing pool and the outlet water storage tank to make the temperature suitable. Hot water flows into the outlet water storage tank, otherwise open the electronic valve on the PVC pipe connecting the No. 2 mixing tank and the return water storage tank; When the value is small, generally ±0.2°C, MSP430 uses the PID control algorithm to adjust x1 and x2 until the difference between the hot water temperature in the No. 2 mixing tank and the set temperature is within the set range; when MSP430 passes through the The hydraulic sensor detects that the amount of water in it reaches the set value, and then starts to open the electronic valve on the PVC pipe that the outlet water storage tank communicates with the outside world.

Claims (10)

1. it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that include：
Housing of hot water box, water cell, maincenter control unit, interactive unit, supply unit, detector unit, flow to unit, heating Unit, power unit；
Described housing of hot water box adopts ABS polymer；Described interactive unit is arranged on heat On tank shell；Described heating unit is arranged in water cell, and described flow to unit, power unit is arranged on conveying list In first；Described water cell, supply unit, maincenter control unit, detector unit are arranged in housing of hot water box；Water cell With supply unit interconnection, maincenter control unit and heating unit, detector unit, interactive unit, flow to unit and be connected, detector unit It is connected with water cell, supply unit respectively.
2. it is according to claim 1 it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that it is described Supply unit be PVC pipeline.
3. it is according to claim 1 and 2 it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that Described flows to unit for electronic valve.
4. it is according to claim 1 it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that it is described Water cell be three storage tanks and two mixing pits；Three storage tanks include hot water storage tank, recirculation water storage tank, water outlet Storage tank；Two mixing pits include a mixing pit and No. two mixing pits；Hot water storage tank passes through supply unit, flows to unit again It is connected with a mixing pit；A number mixing pit is connected by flowing to unit with No. two mixing pits；No. two mixing pits are single by conveying Unit, flow to unit and be connected with recirculation water storage tank, water outlet storage tank respectively；Recirculation water storage tank is single by power unit, conveying Unit, flow to unit and be connected with hot water storage tank；Hot water storage tank, mixing pit, a water outlet storage tank are by supply unit, flow direction Unit is connected with the external world；The shell of hot water storage tank is using the internal double-deck acrylonitrile-butadiene-styrene (ABS) copolymerization for clogging sponge Thing material envelope.
5. it is according to claim 4 it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that it is described Power unit be water pump.
6. it is according to claim 4 it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that it is described Detector unit be temperature sensor and hydrostatic sensor；Temperature sensor is separately positioned on hot water storage tank, No. two mixing pits And a mixing pit with the PVC pipeline that is connected of the external world；Hydrostatic sensor is separately positioned on hot water storage tank, water outlet water storage In case, backflow storage tank.
7. it is according to claim 1 it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that it is described Interactive unit be keyboard, display screen, button, display lamp and knob.
8. it is according to claim 1 it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that it is described Maincenter control unit be MSP430 single-chip microcomputers and its peripheral circuit.
9. it is according to claim 8 it is a kind of based on PID adjust water-saving intelligent temperature control water heater, it is characterised in that it is described Heating unit be metal tube and on-off circuit；Heating unit is connected with maincenter control unit.
10. a kind of temp. control method of the as claimed in claim 9 water-saving intelligent temperature control water heater adjusted based on PID, it is special Levy is to comprise the steps：
1) equipment initialization
Switch on power and heating unit, maincenter control unit, interactive unit, power unit, detector unit are powered；By pressing Lower button starts heating, and by keyboard or knob the setting value of user is input into, and setting value includes the temperature and water outlet water of hot water The size of stream, maincenter control unit is operated；
2) link is heated
Maincenter control unit control heating unit is heated to the water in hot water storage tank, MSP430 single-chip microcomputers output PWM ripples To the on-off circuit of heating unit, the output voltage size of controlling switch circuit, the duty of PWM ripples is bigger, and output voltage is bigger； This output voltage is added on metal tube, and metal tube generates heat to the hot water heating in hot water storage tank, the power of the bigger heating of voltage It is bigger；The temperature of the water yield in hot water storage tank and hot water is adopted in the temperature sensor and hydrostatic sensor having in hot water storage tank Collect and pass to MSP430 single-chip microcomputers, when the water yield crosses the pvc pipe that at least control hot water storage tank is connected with the external world in hot water storage tank Electronic valve on road is opened, and flows into cold water, when hypervolia then controls the PVC that hot water storage tank is connected with the external world in boiler Electronic valve on pipeline is closed；When judging that water temperature is increased to temperature upper limit in boiler, then control heating unit and stop adding Heat, when the temperature in water tank is reduced to lowest temperature, then controls the heating of heating unit full power so that the hot water in boiler is protected Hold in suitable temperature and the water yield；
3) governing loop
It is required whenever user input water temperature t0 and during discharge c0, single-chip microcomputer MSP430 just can read the value of input, Temperature t1 of hot water is input into MSP430 single-chip microcomputers by the temperature sensor in hot water storage tank, what mixing pit was in communication with the outside The temperature of cold water t2 is input into MSP430 single-chip microcomputers by the temperature sensor in PVC pipeline, and single-chip microcomputer is according to the two temperature and use The temperature and discharge of family setting controls electronic valve aperture x1 in the PVC pipeline that a mixing pit is connected with the external world, hot water storage Electronic valve aperture x2 in the PVC pipeline that water tank is connected with a mixing pit, two apertures meet following equation：
x 1 + x 2 = c 0 x 1 · t 1 + x 2 · t 2 c 0 = t 0
Solution can be obtained
The mixed hot water of number mixing pit has been flowed in No. two mixing pits, and the temperature sensor in No. two mixing pits is mixed by No. two The temperature for closing hot water in pond passes to MSP430, when the temperature difference of the hot water temperature in No. two mixing pits and user's setting is in setting In the range of, then the electronic valve that MSP430 is controlled in the PVC pipeline that No. two mixing pits are connected with water outlet storage tank is opened, and makes temperature Suitable hot water flows into water outlet tank, otherwise opens the electricity in the PVC pipeline that No. two mixing pits are connected with recirculation water storage tank Sub- valve；When system detectio is to when the hot water temperature in No. two mixing pits and temperature difference setting more than of user's setting Value, MSP430 adjusts x1 and x2, the hot water temperature in No. two mixing pits and the temperature gap for setting using pid control algorithm In set point；Setting value is reached when MSP430 detects its interior water yield by the hydrostatic sensor in storage tank, is just started Open the electronic valve in the PVC pipeline that water outlet storage tank is communicated with the external world.
CN201710028097.0A 2017-01-12 2017-01-12 Water-saving intelligent temperature-control water heater based on PID adjustment and method thereof Pending CN106679188A (en)

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CN107655209A (en) * 2017-11-10 2018-02-02 西安领投企业管理咨询有限公司 Domestic intelligent keeps the air-source water heater of water temperature
US11313588B2 (en) 2019-09-20 2022-04-26 Camus Hydronics Ltd. System and method for controlling water heater output temperature
CN115268538A (en) * 2022-07-11 2022-11-01 宁波新芝生物科技股份有限公司 Synchronous PID control device and method for water temperature and flow

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CN115268538B (en) * 2022-07-11 2024-04-05 宁波新芝生物科技股份有限公司 Synchronous PID control device and method for water temperature and flow

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Application publication date: 20170517