内底电热垫

一千五百三十三

17

About: Year round cyclist,热的,cold and everything in between.

Keeping my toes warm while cycling in the winter has been a problem for many years.Pedaling keeps the pressure on the front of the foot continuously which seems to impede circulation causing toes to get cold more rapidly than when walking.This is further compounded for those of us who suffer from Raynaud's where our body cuts off circulation to the extremities in response to cold exposure.

化学加热器体积大,often don't fit inside boots,在没有氧气的情况下停止化学反应。

我的解决方案是一对薄的乙烯基垫,可以插入任何鞋内,并与电池连接,以提供数小时的热量。Although this design is for keeping feet warm these pads could be useful for other purposes.

Step 1: Overview & Design

过程

这个项目包括将碳纤维加热回路夹在两层乙烯基粘合剂之间,并分别连接到一个7.4伏电池上。温度随着长度的增加而下降,这就是为什么两个回路并联的原因。由于我们正在创造一个电子电路,碳纤维需要在不交叉的情况下形成一个回路,或者另一个循环。还可以添加开关和电源插头。

乙烯基选择

选用的oracal 651乙烯基I具有很强的永久性粘合剂,设计用于数年的室外使用。Other vinyl sheets with permanent adhesive may also be suitable.Vinyl sheets such as shelving liners with non-permanent adhesive do not have a strong enough bond.

碳纤维加热绳

购物清单中链接的碳热绳产生的热量是这个热垫应用程序所需热量的许多倍。幸运的是,绳子是由12束较小的纤维组成的松散组织,使我们有机会进一步拉伸材料并将热量降低到更合适的水平。当直接插入7.4V电池时,3束加热回路将达到约50°C的峰值温度。drawing around 0.5 amps.由于热回路的热质量较低,你的脚会很快把热量排出,以防止垫子感觉太热。

Battery Life

在2600 mAh锂离子自行车前照灯电池上,加热垫(不考虑电池受冷影响)可能会持续运行4.5小时以上,or 2.5 hours on a 1,500 mah LiPo drone battery.

第二步:购物清单

您可能需要订购的项目以及指向示例项目的链接:

Optional items depending on design choices:

  • Power Connectors (varies with battery selection)
  • 手电筒按钮开关x 2
  • Power LED x 2
  • 多设定功率控制器x 2

Other items you may already have:

  • 烙铁和焊料
  • 热缩管热源(BBQ打火机工作良好)

步骤3:准备加热回路

注释: The temperature the heat loops achieve depends on length,number of bundles and battery voltage.The directions listed below should not be modified without testing to determine how changes affect the heat generated and current consumed.

分离钢丝绳束

  • 切一根长39厘米的碳纤维热绳
  • 从绳子的一端挤压大约一英寸,把捆分开。
  • Slowly pull one bundle until the rope begins to bunch up
  • 用一只手轻轻地把绳子往下拉,直到绳子又直了为止。
  • Slowly pull the individual bundle again until it comes out
  • 重复,直到所有捆被分开,前两个捆一拆下来就容易多了

Making the Heating Loops

  • Cut 2 equal lengths of wire
    • 这根电线需要从鞋尖开始,在鞋垫下面,从后面的伤口到电池,所以长度取决于鞋子/电池的位置。
    • 一种选择可能是让电线足够长以到达外面,然后是电池的延长线
    • 我有冬靴,把电池装在靴子上,65厘米对我来说足够了
  • Strip about 2.5 cm of housing from on end of each wire
  • 把6捆绳子分成2组,每组3根
    • while working try to keep the 2 groups from twisting around each other
  • 将所有6个捆的一端对齐,并用鳄鱼夹夹紧。
  • Tightly wrap the wire around the carbon fiber,trim excess fiber
  • 切一段足够长的热缩管,以覆盖接头,每侧有一点重叠。
  • 将热管滑下电线并套到接头上,and heat to shrink
  • 对碳纤维的另一端重复前面的4个步骤
  • 将两组3分开,并将加热回路放在一边

Step 4: Prepare Vinyl Sheets

  • 取一张12“x 12”乙烯基片材,切成4 6“x 6”正方形。
  • 从6“正方形切下1”条
  • 把你鞋内底的轮廓描在一张纸上,剪下来。
  • Use the paper insole outline to trace the upper part of the insole onto the back of one of the vinyl rectangles
    • 从顶部留出1厘米的间隙
    • the short ends of the vinyl rectangle should be at the top and bottom
    • two of these will be required

对于剩余的施工,一次做一个内底,以避免暴露的粘合剂事故。

  • 从乙烯基上剥下背衬并将乙烯基板放在一边
  • Cut out the insole shape from the backing material in a single piece
    • stop 2 cm from cutting through and cut horizontally over towards the start of the cut
  • Carefully place the outer cut piece back onto the vinyl sheet leaving only the insole shape exposed
  • 使用细尖标记在乙烯基上跟踪边界(跳过底部部分)。to help guide trimming later

第五步:计划你的热循环模式

The carbon rope frays very easily so you can't pull it back up after putting it on the vinyl adhesive.因此,你需要用一种不同的材料制作你的热循环模板。回路模板串比碳纤维短几厘米,以补偿电气接头。如果你有透明的乙烯基塑料,你可以用绳子和胶带把图案放在纸上,然后直接在这两个焊盘上进行追踪。对于彩色乙烯基,由于需要抽出模板两次,因此需要付出更多的努力。

In order to get heat coverage on the small toe,the heat loop needs to be lower on that side of the foot.在我的垫子上,从上面往下大约11厘米。You can use your paper insole cutout to determine how far down you should go.

热循环模式

除了开始和结束,no parts of the loop should touch each other.

Clear Vinyl

  • Trace the upper part of the insole cutout onto a piece of paper
  • 切断留下边界的痕迹
  • 用胶带把这张纸粘在工作面上,这样它就不会四处移动。
  • Cut two pieces of string 37 cm long
  • 画出加热循环图案,在开始和结束时在边界上留下约1厘米的悬空部分。
  • It usually takes several tries to get a good pattern

有色乙烯基

  • 剪两条37厘米聚酯缝纫线
  • 画出加热循环图案,在开始和结束时在边界上留下约1厘米的悬空部分。
  • 通常要试几次才能得到一个好的图案
  • 使用细尖标记跟踪热循环模式
  • 拆掉缝纫线

Step 6: Attaching the Heating Loops

Again the carbon rope will fray easily if it touches the adhesive and is then pulled away,所以尽量避免这种情况。

  • 使用乙烯基背衬的内底切口件覆盖您当前工作位置外的部分粘合胶。Move it around as necessary
  • 在边界外留下约1.25 cm的绳索,this will allow the wires / heat shrink joint to be wrapped to the under side of the insole.
  • 用拇指和食指试着将这3束纤维大致平行放置。这将使衬垫的厚度最小化。
  • When you reach the end of the loop also leave 1.25 cm outside the border even if it means cutting your pattern a little short.
  • 一旦第二个循环到位,begin to peel off the remainder of the vinyl backing
  • After passing the first wire,lay the wire and its fiber down pointing outward
  • The fiber near the second wire might be a bit loose so just give it a half twist before laying it onto the vinyl

Step 7: Sealing,修整和安装

密封和修整

  • Peel the backing off another vinyl rectangle
  • 小心地将边缘与热垫底部对齐
  • Slowly spread the top sheet down towards the top of the heat pad
  • 把两张纸彻底压在一起,沿着热循环和电线向下按压
  • 即使是彩色的乙烯基,你也应该能够通过乙烯基看到内底标记的轮廓,以使用装饰指南。
  • Stay a few mm away from the heat loops and wires to ensure the pad stays sealed

安装

  • 用急救胶带将衬垫粘到鞋垫上
  • 将电线缠绕在鞋垫背面,并用胶带将电线沿其长度固定。

Step 8: Batteries & Controller

电池
每个PAD由7.4V电池组供电。它们有锂聚合物或更高容量的锂离子。在AliExpress上可以找到许多合适的电池,some even include built-in multiple power level output.

Power Controller / Switch

有几个多设置加热衣物控制器可通过AliExpress提供,可与电池组直接连接。One source I found for batteries / power controllers is here:https://www.aliexpress.com/store/2683007?spm=2114.12010108.pcShopHead_8168168.0

Pad Connector

Attach a male DC barrel connector to the pad that matches the jack of the battery.一般尺寸为5.5 x 2.1 mm,以及3.5 x 1.35毫米。

然后你应该准备好去享受几个小时的户外热脚趾。

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