WO2010031237A1 - 一种单片机智能控制电热袋 - Google Patents

一种单片机智能控制电热袋 Download PDF

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Publication number
WO2010031237A1
WO2010031237A1 PCT/CN2009/000489 CN2009000489W WO2010031237A1 WO 2010031237 A1 WO2010031237 A1 WO 2010031237A1 CN 2009000489 W CN2009000489 W CN 2009000489W WO 2010031237 A1 WO2010031237 A1 WO 2010031237A1
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WO
WIPO (PCT)
Prior art keywords
electric heating
bag
temperature sensor
intelligent control
bag body
Prior art date
Application number
PCT/CN2009/000489
Other languages
English (en)
French (fr)
Inventor
邓建威
Original Assignee
Deng Jianwei
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 Deng Jianwei filed Critical Deng Jianwei
Publication of WO2010031237A1 publication Critical patent/WO2010031237A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F7/007—Heating or cooling appliances for medical or therapeutic treatment of the human body characterised by electric heating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F2007/0095—Heating or cooling appliances for medical or therapeutic treatment of the human body with a temperature indicator
    • A61F2007/0096—Heating or cooling appliances for medical or therapeutic treatment of the human body with a temperature indicator with a thermometer

Definitions

  • the utility model relates to the technical field of electric heating and heating bags, in particular to a single-chip intelligent control electric heating bag suitable for storing heat-conducting liquid in a bag.
  • the existing electric heating and heating bag generally has a bag body and an electric heating body.
  • the bag body stores a liquid, and the electric heating body is immersed in the liquid.
  • a thermostat is fixed on the surface of the electric heating body, and the thermostat is connected in series on the heating circuit of the bag body. During operation, the thermostat is used to sense the heating temperature of the electric heating body. When the surface temperature of the electric heating body reaches the set value of the thermostat, the thermostat will be disconnected to de-energize the entire heating circuit, and the heating is stopped to achieve a certain degree. Anti-dry effect.
  • the above-mentioned structure of the electric heating bag has the following disadvantages: (1)
  • the contact power-off protection in the thermostat is a mechanical property, and obviously, the mechanical switch is powered off and reset,
  • the accuracy of temperature control is above plus or minus 3 degrees. Therefore, the temperature control accuracy is not high.
  • after a long time of mechanical switch there will be serious metal fatigue, resulting in inaccurate temperature control of the thermostat.
  • the thermostat even failure, to call the warm bag has a safety hazard; more importantly, the thermostat to be reset, affected by its mechanical characteristics, it takes a while to fully reset, causing great inconvenience to use; (2), as a temperature
  • the temperature controller of the control switch does not have the function expansion function; for example: Since the temperature control parameter set by the temperature controller cannot be modified, the existing electric heating bag cannot be set to multi-position temperature control.
  • the purpose of the utility model is to solve the above various deficiencies in the prior art, and to provide a
  • the structure is simple and reasonable, the temperature control accuracy is high and safe, the reset can be controlled by people, and the single-chip intelligent control electric heating bag with function expansion and humanized manipulation is provided.
  • a single-chip intelligent control electric heating bag comprises a bag body and an electric heating body thereof, wherein a liquid is stored in the bag body, and the electric heating body is immersed in the liquid, wherein the bag body is provided with a thyristor and a single chip microcomputer, and the thyristor is connected in series Between the electric heating body and the single-chip microcomputer, the single-chip microcomputer controls the electric heating body by controlling the conduction angle of the thyristor, and the temperature sensor is also disposed in the inner cavity of the bag, and the single-chip microcomputer is electrically connected with the temperature sensor.
  • the electric heating bag of the utility model is provided with a thyristor and a single chip on the bag body, and a temperature sensor is installed in the bag cavity.
  • the temperature sensor collects the temperature information in the bag in time, and transmits related information to the bag.
  • the single-chip microcomputer controls the thyristor conduction angle in real time by the single-chip microcomputer, and controls the electric heating body to work; the temperature inside the bag body is monitored by using a temperature sensor with high precision, and the thyristor is controlled by the single-chip microcomputer, thereby improving the electric heating bag.
  • the temperature sensor can be used with the single-chip microcomputer to detect the temperature rise slope: that is, the speed of the temperature rise per unit time is detected, the rising slope is too high to determine the dry burn, and if the rising slope is too low, the protection of the explosion-proof device and the circuit failure,
  • the user can be prompted by an additional prompting device such as: LED flashing, in addition to improving the safety of its use, it can also display the heating condition of the bag in real time and intuitively; Real-time monitoring of the body cavity temperature and timely transmission of relevant data to the device
  • a microcontroller with programmable features by modifying the parameters of the single-chip microcomputer, the temperature-controlled power-off protection is reset in time to realize the humanized control of the reset; moreover, the single-chip microcomputer can also cooperate with other functional devices; for example, multi-position temperature control, etc. Expand its functional role to meet different usage requirements.
  • the utility model can also be solved by the following technical measures:
  • the temperature sensor is an NTC thermistor, and the temperature sensor is suspended in the inner cavity of the bag through a wire.
  • the wall of the bag bulges and pulls the wire to warm the cavity of the bag.
  • the degree sensor leaves the liquid level.
  • the MCU determines the conduction angle of the thyristor according to the data transmitted by the temperature sensor, compares the set parameters, and turns the heating circuit on and off to achieve the explosion-proof effect; or the temperature sensor directly Fixed on the electric heating body, when working, when the temperature of the electric heating body is too high, the single chip determines dry burning; when the bag body is heated and expanded, the wall of the bag bulges and pulls the electric heating body wire, so that the electric heating body of the bag body leaves the liquid
  • the MCU controls the thyristor conduction angle based on the data transmitted by the temperature sensor, compares the set parameter determination, determines the protection of the explosion-proof device and the circuit failure.
  • the outer surface of the electric heating body is provided with a receiving groove, and the temperature sensor is placed in the receiving groove and closely adheres to the wall of the groove, so that the temperature sensor can better contact the electric heating. External surface, so that temperature monitoring of the temperature sensor is more accurate.
  • the electric heating body is an electric heating tube heating body, and the electric heating tube heating body is wrapped in the heat conducting housing, and the temperature sensor is fixed on the surface of the heat conducting housing; of course, the electric heating body may also be other heating bodies, such as: electric heating wire.
  • the electric heating body is a double spiral electric heating wire
  • the double spiral electric heating wire comprises a core shaft, an inner layer PTC spiral resistance wire, an NTC heat sensitive layer, an outer spiral resistance wire and an outer insulation layer from the innermost layer to the outermost layer respectively.
  • the temperature sensor is fixed on the surface of the outer insulating layer of the double spiral heating wire.
  • the double-spiral heating wire of the structure has a mandrel functioning as a fixed inner layer PTC spiral resistance wire;
  • the inner layer PTC spiral resistance wire has a PTC characteristic, that is: a positive temperature coefficient of the PTC, and the higher the temperature, the higher the resistivity, and the real-time output
  • the signal changes with temperature;
  • NTC thermosensitive layer has NTC characteristics, Sll: NTC negative temperature coefficient, the higher the temperature, the smaller the resistivity, the same can output the signal with temperature change in real time;
  • the outer spiral resistance wire is mainly used for heating function
  • the outer insulation layer is mainly electrically insulating.
  • a double-screw electric heating wire is arranged in the bag body as an electric heating element, and the bending strength is high, and is not easily deformed by pressure; further, the spiral electric heating wire can realize the effect of temperature control of the whole body of the bag body, which is beneficial to the overall heat balance of the bag, therefore, Solid on the surface of the outer insulation layer of the double spiral heating wire
  • the temperature sensing probe can make the temperature monitoring of the double-spiral heating wire more accurate.
  • an LED can be arranged on the bag body to display the working state, and the LED is electrically connected to the single chip microcomputer.
  • the single chip microcomputer can be fixed on the surface of the outer wall of the bag, or the electric socket of the bag body, or the electric plug of the bag body.
  • the bag body is further provided with a liquid crystal display, and the liquid crystal display is electrically connected with the single chip through the signal line, so as to facilitate the user to visually monitor the heating condition of the bag body.
  • the IC chip is provided with an IC chip, and the IC chip is respectively connected with a switch gear position and a buzzer; the electric heating bag can select a temperature point switch gear position that is required according to the user's needs, and the switch gear position issues various commands to the IC; When the 'heat to temperature set point' is added, the buzzer will sound a beep to prompt the user to turn off the power.
  • the bag body is also provided with a finite current step-down, voltage stabilizing circuit, a current limiting step-down, and an output terminal of the voltage stabilizing circuit are respectively connected.
  • the thyristor can be replaced by a combination of a relay and a triode.
  • the electric heating bag of the utility model is provided with a thyristor and a single chip on the bag body, and a temperature sensor is installed in the bag cavity.
  • the temperature sensor collects the temperature information in the bag body in time.
  • the relevant information is transmitted to the single chip microcomputer, and the single chip microcomputer controls the conduction angle of the thyristor in real time, and controls the electric heating body to work; the temperature inside the bag body is monitored by using a temperature sensor with high precision, and the thyristor is controlled by the single chip microcomputer.
  • the temperature sensor can cooperate with the single chip microcomputer to detect the temperature rising slope: that is, the speed of the temperature rise per unit time is detected, the rising slope is too high to determine the dry burning, and if the rising slope is too low, the explosion is explosion-proof.
  • Device protection and circuit failure When a fault is detected, the user can be prompted by an additional prompting device such as: LED flashing, in addition to improving the safety of its use, it can also display the heating condition of the bag in real time and intuitively;
  • the temperature probe is used to monitor the temperature of the body cavity in real time, and the relevant data is transmitted to the single-chip microcomputer with programmable characteristics in time.
  • the temperature-controlled power-off protection is reset in time to realize the humanized control of resetting;
  • the MCU can also cooperate with other functional devices;
  • the multi-stage temperature control in order to extend its functional role, to meet the different requirements, to achieve the effect of the intelligent control;
  • the electric heating bag of the utility model can realize the object of the utility model only by providing a single-chip computer and a thyristor on the bag body, and installing a temperature sensor in the bag cavity, which has the structure simple and reasonable.
  • the applicable electric heating body is an electric heating tube heating body or a double spiral electric heating line
  • the temperature sensor that is, the temperature sensing probe is electrically heated
  • FIG. 1 is a schematic structural view of an intelligent control electric heating bag of a single-chip microcomputer of the utility model
  • Figure 2 is a schematic view of another embodiment of Figure 1;
  • FIG. 3 is a schematic view showing an embodiment of an electric heating body on the electric heating bag of the present invention as a double spiral electric heating wire;
  • Figure 4 is a perspective cross-sectional view of the double spiral heating wire of Figure 3;
  • FIG. 5 is a circuit diagram of the intelligent control of the single-chip microcomputer of the electric heating bag of the present invention.
  • a single-chip intelligent control electric heating bag comprises a bag body 1 and an electric heating body 2 , wherein a liquid 3 is stored in the bag body 1 , and the electric heating body 2 is immersed in the liquid 1 ,
  • the bag body 1 is provided with a thyristor 13 and a single chip microcomputer 4.
  • the thyristor 13 is connected in series between the electric heating body 2 and the single chip microcomputer 4, and the single chip microcomputer 4 controls the electric heating body 2 by controlling the conduction angle of the thyristor 13.
  • the inner cavity of the bag body 1 is also provided with a temperature sensor 5, that is, a temperature sensing probe, and the single chip microcomputer 4 is electrically connected to the temperature sensor 5.
  • the temperature sensor 5 is an NTC thermistor, and the temperature sensor 5 is directly fixed on the electric heating body 2.
  • the specific embodiment is that the outer surface of the electric heating body 2 is provided with a receiving recess 201, a temperature sensor. 5 is placed in the receiving recess 201 and abuts against the wall of the recess.
  • the electric heating body 2 is an electric heating tube heating body, and the electric heating tube heating body is wrapped in a heat conducting housing, and the temperature sensor 5 is fixed on the surface of the heat conducting housing. .
  • the bag body 1 is further provided with a light-emitting diode 7 capable of displaying an operating state, and the light-emitting diode ⁇ is electrically connected with the single-chip microcomputer 4; the bag body 1 is further provided with a liquid crystal display 10, and the liquid crystal display screen 10 is electrically connected to the single-chip microcomputer 4 connection.
  • the single chip microcomputer 4 can be selected to be fixed on the surface of the outer wall of the bag body 1, or the electric socket 8 of the bag body 1, or the electric plug 9 of the bag body 1.
  • the IC chip 401 is provided on the single chip microcomputer, and the IC chip 401 adopts the 8P2711 model.
  • the IC chip is respectively connected with the switch gear position 11 and the buzzer 12, as shown in FIG.
  • the bag body 1 is further provided with a limited current step-down, voltage stabilizing circuit 14, and a current limiting step-down.
  • the output terminals of the voltage stabilizing circuit 14 are respectively connected to the IC chip 401, the buzzer 12, the temperature sensor 5 and the liquid crystal display 10.
  • Embodiment 2 As shown in FIG. 2, the structure is similar to that of Embodiment 1, except that: The temperature sensor 5 is hung in the inner cavity of the bag body 1 through the wire 6, and when the bag body 1 is thermally expanded, the bag wall is swollen and Pulling the wire 6 to make the temperature sensor 5 of the inner cavity of the bag body 1 out of the liquid surface.
  • the single chip microcomputer 4 determines the conduction angle of the thyristor 13 according to the data transmitted by the temperature sensor 5 and compares the set parameters, so that The heating circuit is turned on and off to achieve the effect of explosion protection.
  • Embodiment 3 As shown in FIG. 3 and FIG. 4, the structure is similar to that of Embodiment 1, except that:
  • the electric heating body 2 is a double-screw electric heating wire, so that the bag body 1 is heated uniformly, in the bag body 1
  • a fixing plate 14 with a hole may be fixed therein, and a double spiral electric heating wire is disposed in the hole of the fixing plate 14.
  • the double spiral electric heating wire includes a mandrel 202 and an inner layer PTC spiral resistance wire 203 from the innermost layer to the outermost layer respectively.
  • the NTC thermosensitive layer 204, the outer spiral resistance wire 205 and the outer insulating layer 206, the temperature sensing probe 5' is fixed on the surface of the outer insulating layer 206 of the double spiral heating wire.
  • the double-spiral heating wire of the structure has a mandrel 202 functioning as a fixed inner layer PTC spiral resistance wire 203; an inner layer PTC spiral resistance wire 203 having a PTC characteristic, SP: a positive temperature coefficient of PTC, and a higher temperature, a higher resistivity. It can output the signal with temperature change in real time; NTC thermistor layer 204 has NTC characteristics, namely: NTC negative temperature coefficient, the higher the temperature, the smaller the resistivity, the same real-time output of the signal with temperature change; the outer spiral resistance wire 205
  • the main function is the heating function; and the outer insulating layer 206 is mainly electrically insulating.
  • a double-screw electric heating wire is arranged in the bag as an electric heating element, and the bending strength is high, and it is not easily deformed by pressure; further, the double-screw electric heating wire can realize the effect of temperature control of the whole body of the bag, which is beneficial to the overall heat balance, so
  • the temperature sensor 5 is fixed on the surface of the outer insulating layer 206 of the double spiral heating wire, so that the temperature monitoring of the temperature sensing probe temperature sensor 5 to the double spiral heating wire is more accurate, so as to improve the safety of its use.
  • the single chip microcomputer 4, the light emitting diode 7, the liquid crystal display panel 10, the thyristor 13, and the like are all disposed on the electrical plug 9. ,
  • the utility model comprises a current limiting buck, a voltage stabilizing circuit 14, an electric heating tube, a thyristor, a single chip microcomputer, a buzzer 12, a temperature sensor 5, a liquid crystal display 10 and a switch gear position, etc.
  • the current limiting buck the voltage stabilizing circuit 14 comprises Fuse Fl, resistors Rl, R3 and R7, diodes D1, D2 and D3, capacitor C3 and C4, AC 220V pass current limiting step-down, voltage regulator circuit 14, output 5V DC, for each electronic device required current;
  • the IC chip model is 8P2711, and the IC chip is respectively connected with resistors R4, R6, R8, R10, R11, R12, R13, R14, R16 and R19, and is connected with a capacitor C1104, wherein the resistor R19 and There is also a thyristor connected
  • the switch gear is grounded, and the other end is connected to the IC chip.
  • the NTC thermistor temperature sensor is connected with a capacitor C104 at both ends, and the resistor R9-end is a 5V power input end. The other end is connected to the capacitor C104.
  • the buzzer 12 is provided with a capacitor C4 between one end of the IC chip, and the transistor Q1 is connected to one end of the IC chip. The base of the transistor Q2 is first connected to the resistor R16, and then connected to the Q1 on the IC chip. One end of the foot is connected.
  • the thyristor 13 in the embodiment can be replaced by a relay and a triode (not shown), and will not be described in detail herein.

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Description

一种单片机智能控制电热袋
技术领域
本实用新型涉及电热取暖袋技术领域， 尤其是一种适用于袋内存储有导热 液体的单片机智能控制电热袋。
背景技术
现有的电热取暖袋， 其结构一般包括有袋体及其电加热体， 袋体内存储有 液体， 电加热体沉浸入液体内。 为了防止袋体内的电加热体干烧， 电加热体表 面上固定有温控器， 温控器串联在袋体的加热电路上。 工作时， 利用温控器感 应电加热体的发热温度， 当电加热体的表面温度达到温控器设定值时， 温控器 会断开使整个加热电路断电， 停止加热， 以实现一定的防干烧作用。 但是， 上 述结构的电热取暖袋， 存在以下不足之处： （1 )、 温控器内的触头断电保护， 属 机械性质的幵关， 明显地， 机械式开关的断电和复位， 其温控的精确度在正负 3 度以上， 因此， 其温控精度不高； 再者， 机械式开关经过长时间多次动作， 会 存在很严重的金属疲劳， 导致温控器温控不准确， 甚至失效， 以致电暖袋存在 安全隐患； 更有的是， 温控器要复位， 受其机械特性影响， 需要一段时间后才 能完全复位， 给使用带来很大的不便； （2)、 作为温控开关的温控器， 不具备功 能扩展的作用； 例如： 由于温控器设定的温控参数不能修改， 因此， 现有的电 热袋不能设定为多档位控温。
实用新型内容
本实用新型的目的在于解决上述现有技术中存在的种种不足， 而提供一种 结构简单、 合理， 温控精确度高、 安全， 复位可由人们操控， 并具有功能扩展、 人性化操控的单片机智能控制电热袋。
本实用新型的目的是这样实现的：
一种单片机智能控制电热袋， 包括袋体及其电加热体， 袋体内存储有液体， 电加热体沉浸入液体内， 所述袋体上设置有可控硅和单片机， 可控硅串接在电 加热体与单片机之间， 单片机通过控制可控硅导通角而控制电加热体工作， 袋 体内腔还设置有温度传感器， 单片机与温度传感器电连接。 该实用新型的电热 袋， 通过在袋体上设置可控硅和单片机， 以及在袋腔内安装有温度传感器， 工 作时， 温度传感器及时地釆集袋体内的温度信息， 并将相关信息传送至单片机， 由单片机实时控制可控硅导通角， 而控制电加热体工作； 由于袋体内采用精确 度较高的温度传感器监测袋体内腔温度， 并通过单片机控制可控硅， 从而提高 了电热袋控温的精确度； 再者， 温度传感器配合单片机， 可以检测温度上升斜 率即： 检测单位时间温升的速度， 上升斜率过高判定干烧， 若上升斜率过低为 防爆装置保护和电路故障， 当检测到故障时， 可以通过附加提示设备如： 发光 二极管闪烁来提示用户， 除提高其使用的安全性外， 还可实时地、 直观地给人 们显示袋体加热状况； 另， 感温探头作为实时监测袋体内腔温度， 并将相关数 据及时传递至具有可编程特性的单片机， 人们通过修改单片机参数， 使控温断 电保护及时复位， 实现复位的人性化操控； 更有的是， 单片机还可配合其它功 能设备； 如： 多档位控温等， 以扩展其功能作用， 满足不同的使用要求。
本实用新型还可以采用以下技术措施解决：
作为更具体的实施， 所述温度传感器是 NTC热敏电阻， 温度传感器通过导 线吊挂在袋体内腔， 当袋体受热膨胀， 袋壁鼓起并拉动导线， 使袋体内腔的温 度传感器离开液面， 此时， 单片机根据温度 感器传送的数据， 对比设定的参 数判定， 控制可控硅导通角， 而使加热电路通断， 以实现防爆的效果； 或温度 传感器直接固定在电加热体上， 工作时， 当电加热体温度过高， 单片机判定干 烧； 当袋体受热膨胀， 袋壁鼓起并拉动电加热体导线， 使袋体内腔的电加热体 离开液面， 此时， 单片机根据温度传感器传送的数据， 对比设定的参数判定， 判定防爆装置保护和电路故障， 而控制可控硅导通角。 '
作为更优先的方案， 所述电加热体的外表面上开有容置凹槽， 温度传感器 置于容置凹槽内并紧贴凹槽的壁部， 以便温度传感器能更好地接触电加热体外 表面， 以便温度传感器的温度监测更趋准确。
所述电加热体是电热管加热体， 电热管加热体被包裹在导热壳体内， 温度 传感器固定在导热壳体表面上； 当然， 电加热体还可以是其它加热体， 如： 电 热丝等。
所述电加热体是双螺旋电热线， 双螺旋电热线由最内层至最外层分别包括 芯轴、 .内层 PTC螺旋电阻丝、 NTC热敏层、 外层螺旋电阻丝和外绝缘层， 温度 传感器固定在双螺旋电热线的外绝缘层表面。 该结构的双螺旋电热线， 其芯轴 起固定内层 PTC螺旋电阻丝作用； 内层 PTC螺旋电阻丝具有 PTC特性， 即： PTC 正温度系数， 温度越高其电阻率越大， 能够实时输出随温度变化的信号； NTC热敏层具有 NTC特性， Sll : NTC负温度系数， 温度越高其电阻率越小， 同样能够实时输出随温度变化的信号； 外层螺旋电阻丝主要作用是发热功能； 而外绝缘层主要是电绝缘作用。 在袋体内设置双螺旋电热线作为电加热元件， 其抗弯曲强度很高， 不易受压形变； 再者， 螺旋电热线可实现袋体全线控温 的效果， 有利于其整体受热均衡， 因此， 在双螺旋电热线的外绝缘层表面上固 定感温探头， 能使感温探头对双螺旋电热线的温度监测更趋准确。 具有 PTC和 NTC特性的双螺旋电热线， 利用其传感特性， 配以电子控制线路， 再配以可控 硅， 随着袋内温度改变， 控制可控硅导通角大小， 进而自动反馈控制电热线电 流大小， 由于双螺旋电热线全线路均具有传感特性， 因此， 达到全线路控温的 效果。 .
为方便人们能够及时地、 直观地观看袋体加热状况， 可以在袋体上还设置 有可显示工作状态的发光二极管， 发光二极管与单片机电连接。
作为单片机的具体位置固定， 单片机可以固定在袋体外壁的表面， 或袋体 的电插座， 或袋体的电插头上。
所述袋体上还设有液晶显示屏， 液晶显示屏通过信号线与单片机电连接， 以方便用户直观监测袋体的加热情况。
所述单片机上设有 IC芯片， IC芯片分别连接有开关档位和蜂鸣器； 电热 袋可以根据用户需要选择自己需要的温度点开关档位， 由开关档位向 IC发出各 种指令； 另， 当加'热到温度设定点时， 蜂鸣器发出鸣叫信号， 以提示用户拨掉 电源。 为了向各电子配件提供所需要的电压， 所述袋体上还设置有限流降压、 稳压电路， 限流降压、 稳压电路的输出端分别连接 . IC芯片、 蜂鸣器、 温度传感 器和液晶显示器； 这里的电压可以是直流 5V。
所述可控硅可以由继电器和三极管的组合代替。
本实用新型的有益效果是：
( 1 )、 本实用新型的电热袋， 通过在袋体上设置可控硅和单片机， 以及在 袋腔内安装有温度传感器， 工作时， 温度传感器及时地采集袋体内的温度信息， 并将相关信息传送至单片机， 由单片机实时控制可控硅导通角， 而控制电加热 体工作； 由于袋体内采用精确度较高的温度传感器监测袋体内腔温度， 并通过 单片机控制可控硅， 从而提高了电热袋控温的精确度； 再者， 温度传感器配合 单片机， 可以检测温度上升斜率即： 检测单位时间温升的速度， 上升斜率过高 判定干烧， 若上升斜率过低为防爆装置保护和电路故障， 当检测到故障时， 可 以通过附加提示设备如： 发光二极管闪烁来提示用户， 除提高其使用的安全性 外， 还可实时地、 直观地给人们显示袋体加热状况； 另， 感温探头作为实时监 测袋体内腔温度， 并将相关数据及时传递至具有可编程特性的单片机， 人们通 过修改单片机参数， 使控温断电保护及时复位， 实现复位的人性化操控； 更有 的是， 单片机还可配合其它功能设备； 如： 多档位控温等， 以扩展其功能作用， 满足不同的使用要求， 实现智能控制的效果；
(2)、 本实用新型的电热袋， 仅通过在袋体上设置单片机和可控硅， 以及在 袋腔内安装有温度传感器， 即可实现本实用新型的目的， 其具有结构简单、 合 理的优点；
(3 )、 本实用新型电热袋上增设的单片机、 可控硅和温度传感器， 可应用的 电加热体为电热管加热体或双螺旋电热线上， 能使温度传感器， 即感温探头对 电热管加热体或双螺旋电热线的温度监测更趋准确， 袋体使用更安全。
附图说明
图 1是实用新型的单片机智能控制电热袋的结构示意图；
图 2是图 1的另一实施例示意图；
图 3是本实用新型电热袋上的电加热体为双螺旋电热线的实施例示意图； 图 4是图 3中双螺旋电热线的立体剖视图；
图 5是本实用新型电暖袋单片机智能控制的电路图。
具体实施方式
实施例 1 : 如图 1所示， 一种单片机智能控制电热袋， 包括袋体 1及其电加 热体 2， 袋体 1内存储有液体 3， 电加热体 2沉浸入液体 1内， 所述袋体 1上设 置有可控硅 13和单片机 4， 可控硅 13串接在电加热体 2与单片机 4之间， 单片 机 4通过控制可控硅 13导通角而控制电加热体 2工作， 袋体 1内腔还设置有温 度传感器 5， 即感温探头， 单片机 4与温度传感器 5电连接。 其中， 温度传感器 5为 NTC热敏电阻， 温度传感器 5直接固定在电加热体 2上， 其具体实施方式 是， 在所述电加热体 2的外表面上开有容置凹槽 201， 温度传感器 5置于容置凹 槽 201内并紧贴凹槽的壁部。
所述电加热体 2是电热管加热体， 电热管加热体被包裹在导热壳体内， 温 度传感器 5固定在导热壳体表面上。 .
所述袋体 1上还设置有可显示工作状态的发光二极管 7， 发光二极管 Ί与 单片机 4电连接； 袋体 1上还设有液晶显示屏 10， 液晶显示屏 10通过信号线与 单片机 4电连接。 单片机 4可以选择固定在袋体 1外壁的.表面， 或袋体 1 的电 插座 8， 或袋体 1的电插头 9上。
所述单片机上设有 IC芯片 401 , IC芯片 401采用 8P2711型号， IC芯片分 别连接有开关档位 11和蜂鸣器 12， 见图 5所示。
所述袋体 1上还设置有限流降压、 稳压电路 14， 限流降压、 稳压电路 14 的输出端分别连接 IC芯片 401、 蜂鸣器 12、 温度传感器 5和液晶显示器 10。 实施例 2: 如图 2所示， 其结构与实施例 1相似， 不同之处是： 温度传感器 5通过导线 6吊挂在袋体 1内腔， 当袋体 1受热膨胀， 袋壁鼓起并拉动导线 6, 使袋体 1 内腔的温度传感器 5离开液面， 此时， 单片机 4根据温度传感器 5传 送的数据， 对比设定的参数判 έ， 控制可控硅 13导通角， 以使加热电路通断， 以实现防爆的效果。
实施例 3 : 如图 3和图 4所示， 其结构与实施例 1相似， 不同之处是： 所述 电加热体 2是双螺旋电热线， 为使袋体 1受热均匀， 在袋体 1 内可以固定有带 孔的固定板 14， 双螺旋电热线穿设在固定板 14的孔内， 双螺旋电热线由最内层 至最外层分别包括芯轴 202、 内层 PTC螺旋电阻丝 203、 NTC热敏层 204、 外层 螺旋电阻丝 205和外绝缘层 206， 感温探头 5 '固定在双螺旋电热线的外绝缘层 206表面。该结构的双螺旋电热线，其芯轴 202起固定内层 PTC螺旋电阻丝 203 作用； 内层 PTC螺旋电阻丝 203具有 PTC特性， SP : PTC正温度系数， 温度越 高其电阻率越大， 能够实时输出随温度变化的信号； NTC热敏层 204具有 NTC 特性， 即： NTC负温度系数， 温度越高其电阻率越小， 同样能够实时输出随温 度变化的信号； 外层螺旋电阻丝 205主要作用是发热功能； 而外绝缘层 206主 要是电绝缘作用。 在袋体内设置双螺旋电热线作为电加热元件， 其抗弯曲强度 很高， 不易受压形变； 再者， 双螺旋电热线可实现袋体全线控温的效果， 有利 于其整体受热均衡， 因此， 在双螺旋电热线的外绝缘层 206表面上固定温度传 感器 5， 能使感温探头温度传感器 5对双螺旋电热线的温度监测更趋准确， 以提 高其使用的安全性。 再者， 该实施方式， 把单片机 4、 发光二极管 7、 液晶显示 屏 10、 可控硅 13等均设置在电插头 9上。 ，
如图 5所示， 是本实用新型电热袋单片机智能控制电路的其中一个实施例； 其包括限流降压、 稳压电路 14、 电加热管、 可控硅、 单片机、 蜂鸣器 12、 温度 传感器 5和液晶显示器 10和开关档位等， 限流降压、 稳压电路 14包括保险丝 Fl、 电阻 Rl、 R3和 R7， 二极管 Dl、 D2和 D3， 电容 C3禾卩 C4， 交流电 220V 通过限流降压、 稳压电路 14后， 输出 5V直流电， 供各电子器件所需电流； 单 片机上设有 IC芯片， IC芯片型号为 8P2711，IC芯片分别连接有电阻 R4 、 R6 、 R8、 R10 、 Rll、 R12 、 R13、 R14、 R16和 R19， 且并接有电容 C1104, 其中， 电阻 R19与电加热管之间还串接有可控硅， 幵关档位一端接地， 另一端与 IC芯 片相连， NTC热敏电阻温度传感器两端并接有电容 C104, 电阻 R9—端为 5V 电源输入端，另一端接电容 C104,蜂鸣器 12与 IC芯片一端脚之间设有电容 C4, 三极管 Q1与 IC芯片一端脚相连， 三极管 Q2基极先连接电阻 R16后， 再与 IC 芯片上与 Q1相连的一端脚相接。
所述实施例中的可控硅 13可以由继电器和三极管代替 （未视出）， 这里不 再详述。
上述电路的实施例， 仅为本实用新型的其中一实施方式， 并不是对本实用 新型作出穷尽性的限制。

Claims

1. 一种单片机智能控制电热袋， 包括袋体 （1) 及其电加热体 (2)， 袋体
(1) 内存储有液体 （3)， 电加热体 （2) 沉浸入液体 （1) 内， 其特征是， 所述 袋体 （1) 上设置有可控硅 （.13)和单片机 （4)， 可控硅 （13) 串接在电加热体
(2) 与单片机 （4) 之间， 单片机 （4) 通过控制可控硅 （13) 导通角而控制电 加热体 （2) 工作， 袋体 （1) 内腔还设置有温度传感器 （5)， 单片机 （4) 与温 度传感器 （5) 电连接。
2. 根据权利要求 1所述单片机智能控制电热袋， 其特征是， 所述温度传感 器 （5) 是 NTC热敏电阻， 温度传感器 （5) 通过导线 （6) 吊挂在袋体 （1)·内 腔， 或温度传感器 （5) 直接固定在电加热体 （2) 上。
3. 根据权利要求 2所述单片机智能控制电热袋， 其特征是， 所述电加热体 (2) 的外表面上开有容置凹槽 （201)， 温度传感器 （5) 置于容置凹槽 （201) 内并紧贴凹槽的壁部。
4. 根据权利要求 2所述单片机智能控制电热袋， 其特征是， 所述电加热体 (2) 是电热管加热体， 电热管加热体被包裹在导热壳体内， 温度传感器 （5) 固定在导热壳体表面上。
5. 根据权利要求 1所述单片机智能控制电热袋， 其特征是， 所述电加热体 (2) 是双螺旋电热线， 双螺旋电热线由最内层至最外层分别包括芯轴 (202)、 内层 FTC螺旋电阻丝 （203)、 NTC热敏层 （204)、 外层螺旋电阻丝 （205) 和 外绝缘层 （206)， 温度传感器 （5) 固定在双螺旋电热线的外绝缘层 （206) 表 面。
6. 根据权利要求 1或 4或 5所述单片机智能控制电热袋， 其特征是， 所述 袋体 （1) 上还设置有可显示工作状态的发光二极管 （7)， 发光二极管 （7) 与 单片机 （4) 电连接。
7. 根据权利要求 1 所述单片机智能控制电热袋， 其特征是， 所述单片机 (4) 固定在袋体 （1) 外壁的表面， 或袋体 （1) 的电插座 （8)， 或袋体 （1) 的电插头 （9) 上。
8. 根据权利要求 6所述单片机智能控制电热袋， 其特征是， 所述袋体（1) 上还设有液晶显示屏 （10)， 液晶显示屏 （10) 通过信号线与单片机 （4) 电连 接。
9. 根据权利要求 8所述单片机智能控制电热袋， 其特征是， 所述单片机 上设有 IC芯片（401 )， IC芯片（401 )分别连接有开关档位（ 11 )和蜂鸣器（12)， 所述袋体（1)上还设置有限流降压、稳压电路（14)， 限流降压、稳压电路（14) 的输出端分别连接 IC芯片 （401)、 蜂鸣器 （12)、 温度传感器'（5) 和液晶显示 器 （10)。
10. 根据权利要求 1所述单片机智能控制电热袋， 其特征是， 所述可控硅 (13) 可以由继电器和三极管代替。
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