1246638 九、發明說明： 【發明所屬之技術領域】 本發明係有關-種發熱結構及其控溫方法，尤指—種藉由一 PTC元件進行加熱’並利用pTC元件特性，使交流電源相位整形電 路及交流電馳錢遲整形電路所分娜_直流方波訊號產生 相移’以即時控制觸發電路的開關，使PTC元件加熱或降溫，從 而使發熱線保持在-定的工作溫度；適用於電熱爐、熱敷毯等發 鲁 熱裝置使用者。 【先如技術】 發熱結構在目前市面上已被廣泛的使用，如第7圖所示，其 為相當普遍的-種熱敷墊結構，主要係於—套袋内裝設一組上、 下層$的‘電板al，一導電板ai之間夾置複數個陶瓷電阻a2， 再於二導電板al外包覆軟性耐熱絕緣膠體a3，以構成熱敷片a。 該陶瓷電阻a2係為正溫度係數(P〇sitive Temperatu]re φ C〇efflcient，PTC)元件，當二導電板al通電後，由於PTC元件 的電阻值會隨著溫度的上升而產生急遽的變化，當電阻值加大至 使電流無法流通時，即形成斷路狀態，而達到固定溫度的控制。 另如第8圖所示，美國第5,081，341號專利案則提出了一種 在織物b内直接將發熱電阻線bl短路，以向外凸出二接觸部b2， 並藉由切換開關b3以控制電流是否導通，以進行加熱的結構，其 與前述習用技術一樣，未能提供及時的偵測，且無法進行多段式 的溫度控制。 1246638 因此，為達到可調整、控制溫度的目的，以pTC元件做為感· 測結構，並同時搭配發熱線以進行加熱的方式即被大量使用。如 第9圖所示係為美國第5, 861，61〇號專㈣，其於一芯材c的外 周緣依序包覆捲繞加熱用的導線cl、第二絕緣層c2、债測線⑸ 及第-絕緣層c4, _線c3係為PTC材料(鎳合金)所製成。當偵 測線c3的溫度隨著加熱導線cl的溫度上升，或因高溫使得偵測 線c3的電阻改變’者將經由控制器内的比較電路進行比對，再以 •比對結果調整_入導線cl的電流量，以控制發熱溫度在使用者所 設定的範圍内。 上述技術在美國第6, 300, 597號、第6,310,322號及第 6768086料觀已同時被揭露。再者，如㈣圖所示係為美國 第6, 222,162號專利案之電路控制圖，其揭示了另一種观元件 的應關，其與上述各制結構的最大不随，在於使用單-的 PTC合金，並藉由量測其加熱後所改變的電阻或電壓，以控制電路 ⑩㈣通或斷路，而達到定溫加熱的目的。 由上述各專利核准案可知，目前以電阻線直接發熱或以观 讀應用在控溫及侧的技術已相當普遍，惟上述各種方式尚有 其待改進的空間： 卜大部份的制技術需畴在熱敷墊或發熱結構内設置加孰 f貞測二種迴路，並向外伸出四個接卿（分別連接二迴路），且 而刀別連接加熱及味電路，電子元件的配置上麟複雜，將增 1246638 加製造的成本，並提升故障率。 或刀別稭由一種不同的迴路達 w；違j上述功犯，當發熱結構的控溫裝 置才貝壞日^，加熱導線將持續 _务… 彳，ί，而有產生火災的危險；對於此 保障。 "、、/ίΓ猎由PTC轉的特性以提供安全的1246638 IX. Description of the invention: [Technical field of the invention] The present invention relates to a heating structure and a method for controlling the temperature thereof, in particular, heating by a PTC element and utilizing the characteristics of the pTC element to phase the AC power supply The circuit and the AC power-sharing circuit are divided into _ DC square wave signal to generate phase shift 'to instantly control the trigger circuit switch, so that the PTC component is heated or cooled, so that the heating wire is maintained at a constant operating temperature; suitable for electric heating Users of furnaces, hot blankets, etc. [First as technology] The heating structure has been widely used in the market. As shown in Figure 7, it is a fairly common type of thermal pad structure, mainly in the bag - set of upper and lower layers $ The electric plate a1, a plurality of ceramic resistors a2 are interposed between the conductive plates ai, and the soft heat-resistant insulating rubber a3 is coated on the outer portions of the two conductive plates a1 to form the thermal sheet a. The ceramic resistor a2 is a positive temperature coefficient (P〇sitive Temperatu)re φ C〇efflcient (PTC) element. When the two conductive plates a1 are energized, the resistance value of the PTC element changes rapidly with the temperature rise. When the resistance value is increased to make the current unable to flow, the open circuit state is formed, and the control of the fixed temperature is reached. As shown in Fig. 8, the U.S. Patent No. 5,081,341 proposes a method of short-circuiting the heating resistor wire bl directly in the fabric b to project the two contact portions b2 outward and to control by switching the switch b3. The structure in which the current is turned on for heating, like the conventional techniques described above, fails to provide timely detection and is not capable of multi-stage temperature control. 1246638 Therefore, in order to achieve the purpose of adjusting and controlling the temperature, the pTC element is used as the sensing and measuring structure, and the heating wire is simultaneously used for heating. As shown in Fig. 9, it is No. 5, 861, 61 美国 (4) of the United States, which sequentially wraps the heating wire cl, the second insulating layer c2, and the debt measuring line (5) on the outer periphery of a core material c. And the first insulating layer c4, the _ line c3 is made of a PTC material (nickel alloy). When the temperature of the detection line c3 rises with the temperature of the heating wire cl, or the resistance of the detection line c3 changes due to the high temperature, the comparator circuit will be compared via the comparison circuit in the controller, and then the result of the comparison is adjusted. The amount of current of the wire cl is controlled to be within the range set by the user. The above techniques have been disclosed at the same time in the U.S. Nos. 6,300,597, 6,310,322 and 6768086. Furthermore, as shown in the figure (4), it is a circuit control diagram of the US Patent No. 6,222,162, which discloses another aspect of the component, and the maximum non-conformity with the above-mentioned various structures is the use of a single-PTC. The alloy, and by measuring the resistance or voltage changed after heating, to control the circuit 10 (four) to open or open, to achieve the purpose of constant temperature heating. It can be seen from the above-mentioned patent approval cases that the current technology of directly heating the resistor wire or applying temperature to the temperature and side is quite common, but there are still some spaces for improvement in the above various methods: The domain is provided with two twisting circuits in the heat pad or the heating structure, and four joints are extended outward (connecting the two circuits respectively), and the knife is connected to the heating and flavor circuit, and the electronic components are arranged on the forest. Complex, will increase the cost of manufacturing 1246638 plus increase the failure rate. Or the knife does not stalk by a different circuit to achieve w; violation of the above sin, when the heating structure of the temperature control device is bad, ^ heating wire will continue ... 彳, ί, and there is a danger of fire; This guarantee. ",,/ίΓ Hunting features transferred by PTC to provide security
二於此為了改善上述之缺點，使發熱結構及其控溫方沒 i=rpTc元件的特性以進行控溫，使元件的組成單純，節 ;、'、本’降低使用故障率，且可在過電流時自動斷電，以達 1文全防護的效果，發明人積多年的經驗及不斷的研發改進，遂 有本發明之產生。 【發明内容】 一本I明之主要目的在提供一種發熱結構之控溫方法,藉由打C 兀件的特性，聽合絲魏她整形電路及交流電源延遲相位 整形電路所分難生之錢枝的比較，職在低溫時持續加 熱’而在高溫時自動斷電，以控制在使用者所奴的工作溫度者。 本發明之次要目的在提供一種發熱結構，藉由一 pTc元件與 —的連接’使發熱線二接觸點凸出於袋體，以連接控制器， 俾使元件的組成單純，節省材料成本，以降低制故障率者。 、為達上述之發日狀目的，本發明所設之—種發熱結構之控溫 方法包括下列步驟：a、設^加熱溫度；b、電流導通以對既 一牛進行加咖，並使部份分流輸入交流電源相位整形電路，整形 1246638 為直流方波；c、導通電流的一部份分流進入交流電源相位延遲整· 形電路，使弦波訊號產生延遲，再轉換成直流方波訊號；d、在加 熱過程中，以微處理器定時偵測比較交流電源相位整形電路與交 流電源相位延遲整形電路所分別轉換的直流方波訊號之間的相 移；以及e、控制觸發電路的開關，使其呈導通（〇N)或斷路（〇FF) 狀態，以使PTC元件加熱或降溫，從而使發熱線保持在一定的工 作溫度。 一種發熱結構，包括一發熱線以及一控制器。發熱線包括芯 材、PTC元件、絕緣可熔層及短路線，PTC元件與短路線的一端 連接，且PTC元件可在導電後發熱；而控制器分別連接PTC元件 與短路線的另端，包含-電路板，其設有—交流電源相位整形電 路及-交流電源她賴整職路，时職錢弦波訊號轉換 成直机方波城’且PTC元件的溫度上升，使流經交流電源相位 延遲整形電路_電流產生變化時，可使二整形電路之間的相移 改變。 藉此’電路板上所設的微處理器價測後，可控制一觸發電路 呈導通或斷路狀態，使PTC元件加熱或降溫，從而使發熱線保持 在一定的工作溫度。 為便於對本發明能有更深入的瞭解，兹詳述於後·· 【實施方式】 包括下 請參閱第1、2騎示，本發明發熱結構的控溫方法 列步驟： 1246638 a、藉由使用者介面31以設定加熱時間及溫度，並使電流導 通。 b 對正〉皿度係數元件（Positive TemperatureSecondly, in order to improve the above-mentioned shortcomings, the heating structure and its temperature control side do not have the characteristics of the i=rpTc element for temperature control, so that the composition of the element is simple, and the section, ', and ' reduce the use failure rate, and When the current is over-current, the power is automatically turned off, so as to achieve the effect of full protection of the article, the inventor has accumulated many years of experience and continuous research and development improvements, and the invention has been produced. SUMMARY OF THE INVENTION The main purpose of the present invention is to provide a temperature control method for a heat-generating structure. By playing the characteristics of the C-piece, it is difficult to listen to the wire shaping circuit and the AC power supply delay phase shaping circuit. In comparison, the user continues to heat at low temperatures and automatically powers off at high temperatures to control the operating temperature slaved by the user. A secondary object of the present invention is to provide a heat-generating structure in which a connection point of a pTc element and a junction of the heating wire protrudes from the bag body to connect the controller, so that the composition of the component is simple and the material cost is saved. To reduce the failure rate. In order to achieve the above-mentioned purpose, the temperature control method of the heating structure of the present invention comprises the following steps: a, setting the heating temperature; b, conducting the current to add the coffee to the same cow, and making the part The shunt input AC power phase shaping circuit, the shaping 1246638 is a DC square wave; c, a part of the on current is shunted into the AC power phase delay integer shaping circuit, causing the sine wave signal to be delayed and then converted into a DC square wave signal; d. During the heating process, the microprocessor periodically detects and compares the phase shift between the DC square wave signals respectively converted by the AC power phase shaping circuit and the AC power phase delay shaping circuit; and e, controls the switching of the trigger circuit, It is turned on (〇N) or open (〇FF) to heat or cool the PTC element, so that the heating wire is kept at a certain operating temperature. A heat generating structure includes a heating wire and a controller. The heating wire includes a core material, a PTC component, an insulating fusible layer and a short-circuit line, the PTC component is connected to one end of the short-circuit wire, and the PTC component can generate heat after being electrically conductive; and the controller is respectively connected to the other end of the PTC component and the short-circuit wire, including - The circuit board, which is equipped with - AC power phase shaping circuit and - AC power, she relies on the whole job, when the job string signal is converted into a straight machine, and the temperature of the PTC component rises, so that the phase flows through the AC power supply. When the delay shaping circuit _ current changes, the phase shift between the two shaping circuits can be changed. After the price of the microprocessor provided on the circuit board, the trigger circuit can be controlled to be turned on or off, so that the PTC element is heated or cooled, so that the heating line is maintained at a certain operating temperature. In order to facilitate a more in-depth understanding of the present invention, it is described in detail below. [Embodiment] Including the first and second riding instructions, the temperature control method of the heating structure of the present invention is listed as follows: 1246638 a, by user The interface 31 sets the heating time and temperature and conducts the current. b Alignment > Positivity coefficient component (Positive Temperature
Coefficient，PTC) 22進行加溫，並使部份分流輸入交流 電源相位整形電路33，整形為直流方波。 c、 使導通電流的一部份分流進入交流電源相位延遲整形電 路34，以使弦波訊號產生延遲，再轉換成直流方波訊號。 d、 在PTC兀件22的加熱過程中，以微處理器35定時偵測， 並比較交流電源她整形電路33與交流電源相位延遲整 形電路34所分別轉換的直流方波訊號之間的相移。 e、 控制觸發電路36的開關⑽AC)，使其呈導通⑽）或 斷路（OFF)狀態，以使PTC元件22加熱或降溫，從而使 發熱線2保持在一定的工作溫度。 請參閱第3、4圖所示，本發明以輸入頻率為6〇赫㈤之交 流電為例’進—步制加熱及控溫之方法。首先，設定交流電週 期計數器等於零，並逐漸增加交流電週期數（每增加—週期表示 時間增加1/6G秒），當總週期數小於6()、交流相位準位為〇， _指標為1時，且在簡日接其雙向閘流體（職）之狀離為 通路，則觸發電路36在受控制下輸出脈波，分別於每-週期的 pl及P2二點對開關（其係為雙向閘流體⑽·觸發，使電路 ¥通以進仃加熱持續控溫’直至侦測指標為〇 (即週期數等於 1246638 = =____ TRIAG。峨iac 成斷路 生:移=線2纖電電源相位延遲整形電路34形成回路產 / (如第4圖所不）。上述步騎定每—秒將偵測一次， ^耗㈣1/60秒，然而在實際運用時，可依需要做不同時間Coefficient, PTC) 22 performs warming, and partially splits the input AC power phase shaping circuit 33 into a DC square wave. c. Divert a portion of the on current into the AC power phase delay shaping circuit 34 to delay the sine wave signal and convert it into a DC square wave signal. d. During the heating process of the PTC element 22, the microprocessor 35 periodically detects and compares the phase shift between the DC power wave signal converted by the AC power supply shaping circuit 33 and the AC power phase delay shaping circuit 34, respectively. . e. Controlling the switch (10) AC) of the trigger circuit 36 to be in a conducting (10)) or open (OFF) state to cause the PTC element 22 to heat or cool, thereby maintaining the heating wire 2 at a certain operating temperature. Referring to Figures 3 and 4, the present invention uses an AC having an input frequency of 6 kHz (five) as an example of a method of heating and controlling temperature. First, set the AC cycle counter equal to zero, and gradually increase the number of AC cycles (each increase - cycle indicates a time increase of 1 / 6G seconds), when the total number of cycles is less than 6 (), the AC phase level is 〇, the _ indicator is 1, And in the case of the bidirectional thyristor (service), the trigger circuit 36 outputs a pulse wave under control, respectively, at each of the period pl and P2 two-point switch (which is a two-way thyristor (10)·Trigger, make the circuit pass through the heating and continue to control the temperature until the detection index is 〇 (that is, the number of cycles is equal to 1246638 = =____ TRIAG. 峨iac becomes the circuit breaker: shift = line 2 fiber power phase delay shaping circuit 34 forms a loop production / (as shown in Figure 4). The above steps will be detected once every second, ^ (4) 1 / 60 seconds, but in actual use, you can do different times according to your needs.
交流她絲轨33於1 _正常加熱之狀態， 晏偵測扣標為〇時，TRIac 使電容器得至卜入的亦心 間不被觸發’藉以 于到王的充、放電，以取得精確的偵測值。 ^ ’將侧指標鱗設定為丨，以避免在—秒内重覆偵測， 數器亦設為〇。如前所述，當相移⑺產生改變時，藉Communicate her wire rail 33 in 1 _ normal heating state, 晏 when the detection buckle is 〇, TRIac will make the capacitor into the heart and will not be triggered 'by borrowing to charge and discharge to the king to obtain accurate Detect value. ^ ' Set the side indicator scale to 丨 to avoid repeat detection in - seconds, and the counter is also set to 〇. As mentioned earlier, when the phase shift (7) changes, borrow
器35 __，可㈣發_維持在使时所設定 二當交流電源相位延遲整形電路34所轉換的方波訊號相 二位則檢查τ緖之狀態，若職C呈斷路狀態， 二撕數__移時間小於使_獅時間，職將繼 :被=制導通；而若時間計數㈣的相料間不是小於使用者設 疋的可間’則TRIAC延續之前的斷路狀態，以持續控溫。 + AC呈導通狀悲，且時間計數器内的相移時間大於或等 於使用者設定的時間，舰c將斷路，不再進行加熱；若時間計數 器内的相移時間小於使用者設定的時間，則職延續之前的導 通狀態，以持續控溫。 請參閱第1、2及5、6圖所示，其為本發明發熱結構i之較 1246638 佳貫施例，包括呈電性連接的_發熱線2及-控制n 3。在實際應 用時，發熱線2的外部可包覆_袋體，以做為電熱毯使用。 該發熱線2包括由内而外依序排列的一芯材21、一叹元件 22、-絕緣可炫層23、-短路線24及一外披覆層25。pTc元件 22係為捲繞於芯材21外周緣的線材，而絕緣可炫層烈係為聚乙 烯（polyethylene，PE)，其熔化溫度介於攝氏125〜13〇度之間； 短路線24為捲繞於絕緣可熔層23外周緣的導綠，其内包括至少 _ 條〜線上$ PTC元件22與短路線24的位置可互換，且ptc 元件22與短路線24的一端連接呈串連狀態，另端分別形成接觸 點（26、26’）。 該控制器3與二接觸點（26、26，）呈電性連接，包含使用者 介面31及-電路板32，使用者介面31上設有時間及溫度控制裝 置而電路板32上設有-交流電源相位整形電路33、一交流電源 相位延遲整形電路34、一微處理器35 (型號為pic顧）以及 曰觸毛=路36。其中’交流電源相位整形電路犯包含_雙極電 晶體、二極體及電阻，交流電源相位延遲整形電路私包含電阻一 電容⑽電路、_雙極電晶體、二極體及電阻；而觸發電路 36包含-可控制電流是否導通之開關，其係為雙向間流體 (職）。上述電阻—電容⑽電路可用以產生相位的延遲。 痒使用者操作時，可藉由使用者介面31輸入以設定使用時間及 ，皿又，亚使電流導通，此時，觸發電路36之_呈導通（〇n) 1246638 狀態，輸入的交流電經由PTC元件22、短路線24及觸發電路36 · 之TRIAC，以形成一迴路，使PTC元件22開始加熱。 在上述電路中，電源所輸入交流電的部份分流，經由電路板 32内所设的父流電源相位整形電路33，使交流弦波訊號轉換成直 流方波§fL號’並輸入於微處理器35内，以做為比較的基準。而交 流電在流經PTC元件22及短路線24之後，其一部份分流進入交 流電源相位延遲整形電路34，藉由電阻-電容（rc)時間常數特性 • 使弦波訊號產、生延遲，再轉換成直流方波訊號。上述交流電源相 位整形電路33與交流電源相位延遲整形祕34所分卿換的直 流方波訊號之間可形成一定時間的相移（τ)(如第4圖所示）， 藉由微處理器35的偵測比較，以控制觸發電路36的TRIAC，使其 呈導通（ON)或斷路（0FF)狀態。 當PTC元件22的溫度隨著加熱時間的增長而上升時，其電阻 值隨之逐漸加大，使得流經交流電源相位延遲整形電路34的電流 •同步改變（變小），而使相移加大，此種變化將被微處理器35偵 去並计PTC元件22的溫度。當溫度值達到使用者所設定的 溫度時，微處理器35下達指令，使觸發電路3β的切換為 OFF，使整個迴路呈斷路狀態。 而當觸發電路36的TRIAC切換為斷路狀態時，pTC元件22 的溫度開始下降，藉由PTC材料的基礎特性，流經交流電源相位 延遲整形電路34的電流同步加大，使得相移量減小。微處理器邪 12 1246638 侦知後’控制觸發電路36的麗c切換為〇N，再度使整個迴路呈 導通^，以重新加熱PTC元件22。藉此，可使發熱線2所發出 的熱里維持在使用者所設定的溫度值内，科會有過熱的現象。 然而’當控㈣3的電路損壞，而無法控做呈斷路狀態時， PTC兀件22將持續加熱，在超過攝氏13〇度時，絕緣可炼㈣ 將開始產生炫化現象，使得PTC元件22與短路㈣接觸而形成 知路。此時’ _可_ 23在高溫下持續熔化，短路的路娜豕 漸縮短，並向輸入電源方向移動。以pTC元件22所形成的負载電 流將逐漸加大’在達到—定的電流值時，保險絲熔化斷裂，使得 整個迴路形成斷路現象。 因此，本發明具有以下之優點： 卜本發明所設的PTC元件除了具有發熱的功能之外，且可經由溫 度的欠化^改变電崎’提供給交流電馳條遲整形電路及 微處理器，以做為自動控制觸發電路的開關為⑽或卿之參 考值，可有效提供控制發熱溫度的機制。 本毛明所①的發熱線以二接槪凸出於袋體，以連接控制器， 即可發熱、控溫，在組成上相當單純，不但能有效節省材料成 本，且可大幅降低故障率。 3、 本㈣可依設定的溫度，魏科自動加熱，岐超出設定溫 度時自動斷電而降溫，在使用時可提供即時反應的機制。 4、 本發嚮設之_骑層在賴__，開始產生炫化現 1246638 象，以加大PTC元件的負載電流，並在達到一定的電流值時，. 使保險絲熔化斷裂，可有效達到安全防護的作用。 、、不上所述’依上文所揭示之内容，本發卿可_發明之細 目的，提供„種不僅能藉纟PTC元件的特性以進行控溫，以使元 件的、、且成單純，節省材料成本，降低制故障率，且可在過電流 日寸自動斷電’以達到安全防護效果之發熱結構及其控溫方法，極 具產業上糊之價值，爱依法提出發明專利申請。 Φ 【圖式簡寻說明】 第1圖係為本發明之電路方塊示意圖。 第2圖係為本發明之控制器之電路圖。 第3圖係為本發明進行加熱及控溫時之流程圖。 第4圖係為本發明之實施例使用時之相移狀態示意圖。 第5圖係為本發明之實施例之立體外觀圖。 第6圖係為本發明之發熱線之立體外觀圖。 • 第7圖係為習用熱敷墊結構之組合剖面圖。 第8圖係為習用美國第5,〇81，341號專利案之組合結構示意圖。 第9圖係為習用美國第5,861，61〇號專利案之發熱線之組合剖面 圖0 第10圖係為習用美國第6,222，162號專利案之電路控制圖。 【主要元件符號說明】 熱敷片 導電板 al 陶瓷電阻 a2 耐熱絕緣膠體 a3 14 1246638 織物 b 電阻線 bl 接觸部 b2 切換開關 b3 芯材 c 導線 cl 第二絕緣層 c2 偵測線 c3 第一絕緣層 c4 發熱結構 1 發熱線 2 芯材 21 PTC元件 22 絕緣可熔層 23 短路線 24 外披覆層 25 接觸點 26、26， 控制器 3 使用者介面 31 電路板 32 交流電源相位整形電路 33 交流電源相位延遲整形電路 34 微處理器 35 觸發電路 36The device 35 __, can be (four) send _ maintained at the time of setting the second AC square power phase delay shaping circuit 34 converted square wave signal phase two to check the state of the state, if the job C is open state, the second tear number _ _ shift time is less than the _ lion time, the job will be: = is controlled; and if the time count (four) of the material is not less than the user set 可 between the TRIAC continuation before the open state, to continue to control the temperature. + AC is conductive, and the phase shift time in the time counter is greater than or equal to the time set by the user. Ship c will be disconnected and no longer heated; if the phase shift time in the time counter is less than the time set by the user, then The conduction state before the continuation of the post to continue to control the temperature. Please refer to Figures 1, 2 and 5 and 6 for a preferred embodiment of the heat generating structure i of the present invention, comprising an electrically connected _ heating wire 2 and a control n 3 . In actual application, the outside of the heating wire 2 can be covered with a bag body for use as an electric blanket. The heating wire 2 includes a core material 21, an sling element 22, an insulating glare layer 23, a short-circuiting wire 24, and an outer coating layer 25 which are sequentially arranged from the inside to the outside. The pTc element 22 is a wire wound around the outer periphery of the core material 21, and the insulating glare layer is made of polyethylene (PE), and the melting temperature is between 125 and 13 degrees Celsius; the short-circuit line 24 is The green color wound around the outer periphery of the insulating fusible layer 23 includes at least _ strips to the line. The positions of the PTC element 22 and the short-circuit line 24 are interchangeable, and the ptc element 22 is connected to one end of the short-circuit line 24 in a series connection state. The other ends form contact points (26, 26'), respectively. The controller 3 is electrically connected to the two contact points (26, 26), and includes a user interface 31 and a circuit board 32. The user interface 31 is provided with a time and temperature control device and the circuit board 32 is provided with - The AC power phase shaping circuit 33, an AC power phase delay shaping circuit 34, a microprocessor 35 (model number pic), and a chirping path = path 36. The 'AC power phase shaping circuit contains _ bipolar transistor, diode and resistor, and the AC power phase delay shaping circuit includes a resistor-capacitor (10) circuit, _ bipolar transistor, diode and resistor; and the trigger circuit 36 includes - a switch that controls whether the current is conducting, which is a two-way fluid (job). The resistor-capacitor (10) circuit described above can be used to generate a phase delay. When the user operates, the user interface 31 can be input to set the usage time, and the dish is turned on. At this time, the trigger circuit 36 is turned on (〇n) 1246638 state, and the input AC power is passed through the PTC. The element 22, the shorting line 24, and the TRIAC of the trigger circuit 36 are formed to form a loop that causes the PTC element 22 to begin heating. In the above circuit, a part of the alternating current input from the power source is shunted, and the AC stream signal is converted into a DC square wave §fL ' via the parent current supply phase shaping circuit 33 provided in the circuit board 32 and input to the microprocessor. Within 35, as a benchmark for comparison. After the AC power flows through the PTC element 22 and the short-circuit line 24, a part of it is shunted into the AC power phase delay shaping circuit 34, and the resistance-capacitance (rc) time constant characteristic is used to make the sine wave signal generation and delay. Convert to DC square wave signal. The AC power phase shaping circuit 33 and the DC square wave signal exchanged by the AC power phase delay shaping module 34 can form a phase shift (τ) for a certain period of time (as shown in FIG. 4) by using a microprocessor. The detection of 35 is compared to control the TRIAC of the flip-flop circuit 36 to be in an ON (ON) or OFF (OFF) state. When the temperature of the PTC element 22 rises as the heating time increases, the resistance value thereof gradually increases, so that the current flowing through the AC power supply phase delay shaping circuit 34 changes synchronously (smaller), and the phase shift is added. Large, such changes will be detected by the microprocessor 35 and the temperature of the PTC component 22 will be counted. When the temperature value reaches the temperature set by the user, the microprocessor 35 issues an instruction to turn the trigger circuit 3β OFF, so that the entire circuit is in an open state. When the TRIAC of the trigger circuit 36 is switched to the open state, the temperature of the pTC component 22 begins to decrease. By the basic characteristics of the PTC material, the current flowing through the AC power phase delay shaping circuit 34 is synchronously increased, so that the phase shift amount is reduced. . After the microprocessor 12 122463 is detected, the control c of the trigger circuit 36 is switched to 〇N, and the entire circuit is again turned on to reheat the PTC element 22. Thereby, the heat generated by the heating wire 2 can be maintained within the temperature value set by the user, and the section can be overheated. However, when the circuit of the control (4) 3 is damaged and cannot be controlled to be in an open state, the PTC element 22 will continue to be heated. When the temperature exceeds 13 degrees Celsius, the insulation can be refining (4), and the PTC element 22 and the PTC element 22 will be generated. Short circuit (four) contact to form a knowing path. At this time, _ _ _ 23 continues to melt at a high temperature, and the short-circuited 豕 豕 gradually shortens and moves toward the input power source. The load current formed by the pTC element 22 will gradually increase. When the current value is reached, the fuse melts and breaks, causing the entire circuit to form an open circuit. Therefore, the present invention has the following advantages: The PTC element provided by the present invention has a function of generating heat, and can be modified to provide an alternating current delay shaping circuit and a microprocessor via a temperature reduction. The switch that is used as the automatic control trigger circuit is the reference value of (10) or Qing, which can effectively provide a mechanism for controlling the heating temperature. The heating wire of the Maoming 1 is protruded from the bag body by the two joints to connect the controller, which can generate heat and control temperature. The composition is quite simple, which not only can effectively save material cost, but also can greatly reduce the failure rate. 3. This (4) can be automatically heated according to the set temperature. When the temperature exceeds the set temperature, it will automatically turn off and cool down. It can provide an immediate response mechanism when used. 4, the hair of the set to _ riding layer in Lai __, began to produce Hyunhua 1246638 image to increase the load current of the PTC component, and when a certain current value is reached, the fuse melt fracture, can effectively reach The role of safety protection. And not as described above, according to the contents disclosed above, the present invention can provide the characteristics of the PTC element not only by the characteristics of the PTC element, but also to make the element simple and simple. It can save material cost, reduce the failure rate, and can automatically cut off the power in the over-current day to achieve the safety protection effect of the heating structure and its temperature control method, which has great value in the industry, and loves to file an invention patent application according to law. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of a circuit of the present invention. Fig. 2 is a circuit diagram of a controller of the present invention. Fig. 3 is a flow chart of the present invention for heating and temperature control. Fig. 4 is a perspective view showing a phase shift state when the embodiment of the present invention is used. Fig. 5 is a perspective view showing an embodiment of the present invention. Fig. 6 is a perspective view showing the heat generating wire of the present invention. Figure 7 is a combined sectional view of a conventional thermal pad structure. Figure 8 is a schematic view of the combined structure of the US Patent No. 5, No. 81,341. Figure 9 is a US Patent No. 5,861,61 Combination of heating lines Figure 10 is a circuit control diagram of the US Patent No. 6,222,162. [Main component symbol description] Thermal sheet conductive plate a Ceramic resistor a2 Heat-resistant insulating gel a3 14 1246638 Fabric b Resistance wire bl Contact b2 Switch b3 core Material c wire cl second insulation layer c2 detection line c3 first insulation layer c4 heat generation structure 1 heating wire 2 core material 21 PTC element 22 insulation fusible layer 23 short circuit line 24 outer coating layer 25 contact points 26, 26, control Device 3 User Interface 31 Circuit Board 32 AC Power Phase Shaping Circuit 33 AC Power Phase Delay Shaping Circuit 34 Microprocessor 35 Trigger Circuit 36
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