WO2014127518A1 - 高效加热装置 - Google Patents

高效加热装置 Download PDF

Info

Publication number
WO2014127518A1
WO2014127518A1 PCT/CN2013/071750 CN2013071750W WO2014127518A1 WO 2014127518 A1 WO2014127518 A1 WO 2014127518A1 CN 2013071750 W CN2013071750 W CN 2013071750W WO 2014127518 A1 WO2014127518 A1 WO 2014127518A1
Authority
WO
WIPO (PCT)
Prior art keywords
induction coil
heating system
electromagnetic heating
wire
ceramic panel
Prior art date
Application number
PCT/CN2013/071750
Other languages
English (en)
French (fr)
Inventor
傅福兴
Original Assignee
Fu Fuxing
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 Fu Fuxing filed Critical Fu Fuxing
Priority to PCT/CN2013/071750 priority Critical patent/WO2014127518A1/zh
Publication of WO2014127518A1 publication Critical patent/WO2014127518A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the present invention relates to an apparatus for utilizing an electromagnetic induction heater.
  • the power loss of the wire is composed of surface power loss and external power loss caused by the magnetic field.
  • the wire cross-sectional diameter of the induction coil is reduced, the wire power loss is reduced, thereby achieving energy saving.
  • the basic content of the invention is to provide an electromagnetic heating system with low power loss, easy heat dissipation and intelligent temperature control.
  • the present invention redesigns the wire diameter, improves the heat sink, and adds a temperature sensing device, which overcomes the problem of high power loss and heat dissipation in the electromagnetic heating system.
  • the diameter of a single wire is optimal between 1/4 and 3/4 of the theoretical optimal value of scholars such as E. Baum. If the wire diameter is further reduced, this will cause certain difficulties in the production of the wire, increasing the production cost. Therefore, it is the best choice for mechanical production and electrical principles to twist a few wires of the above specifications.
  • the electromagnetic heating system is as close as possible to the underside of the heated cookware.
  • another important feature of the present invention is that there is a thermal insulation between the induction coil and the ceramic panel carrying the cookware, so that heat is not quickly transmitted from the side of the heated cookware to the induction coil, ensuring low temperature of the induction coil. effect. Therefore, we only need to dissipate a small amount of heat generated by the induction coil, which is easily achieved by means of a cooling device such as a fan.
  • the present invention designs a perfect cooling channel so that the heat of dissipation generated by the electronic components is not easily accumulated.
  • a novel optical measuring device is used to detect the temperature of a ceramic panel. It includes an infrared sensor such as a silicon photodiode that measures temperature according to Planck's law of radiation.
  • the wavelength of the ceramic panel is within the spectral sensitivity of the sensor, so quantifiable temperature signals can be captured by the sensor. According to the Vickers displacement law, as the temperature of the ceramic panel increases, the maximum value of the radiation spectrum of the radiation spectrum increases. We can further use this signal to turn off or turn down the power of the heating system.
  • the above-mentioned ceramic panel overheating may only occur in the case of improper operation of the heating system, such as heating an empty pan on the panel, so the temperature control system must perform a gate function. For example, when the temperature exceeds a predetermined value for the system, the heating system will remain off until the circuit is manually disconnected and reconnected, as this means that the user has found an empty burn condition and has dealt with this problem.
  • This gate function control process can be realized by means of control electronics such as a microcomputer.
  • the invention has the beneficial effects that the electromagnetic heating system in the home can fully save electric energy, and the green life concept is fully embodied in the energy conservation which is increasingly paid attention to today. At the same time, the system achieves extremely low heat accumulation and intelligent temperature control, thus ensuring the safety and convenience of operation.
  • Figure 1 is a plan view of an electromagnetic heating system.
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1.
  • Figure 3 is a cross-sectional view taken along line B-B of Figure 1.
  • Figure 4 is a cross-sectional view of a strand of a wire constituting an induction coil.
  • Fig. 1 two induction cookers 10 are mounted on a ceramic panel 12.
  • An optical sensor 36 is mounted adjacent the central opening 35, and the sensor passes through the induction coil for detecting the radiation of the ceramic panel. Since the high temperature of the heated cookware may cause damage to the ceramic panel, it is necessary to measure the temperature of the ceramic panel by the optical sensor 36 to adjust the power.
  • Optical sensor 36 is an infrared detector with spectral sensitivity in the infrared range. According to the Vickers displacement law, as the temperature of the ceramic panel rises, the maximum value of the radiation spectrum of the radiation spectrum increases.
  • the optical sensor 36 is a silicon photodiode.
  • the energy of the spectral radiation force of the ceramic panel is within the spectral sensitivity range of the optical sensor within a preset safe temperature range, so that a measurable signal is formed, which is processed by the microcomputer. Can be used to adjust heating power or to disconnect the electromagnetic heating system.
  • Fig. 2 we use the rotary knob 26 and the power conditioner 27 to effect adjustment of the heating power.
  • These electronic components can be mounted under the ceramic panel 12 to hide them.
  • An aluminum heat sink 15 is connected to both sides of the tray case 23 made of a metal piece.
  • a vent 25 is left on the side of the short side 24 of the ceramic panel.
  • the fan 17 inside the vent takes in air and passes it through the cooling passages and cooling zone to carry heat out of the heating system.
  • the components in the system can be cooled directly by the air flow or conducted to the heat sink 15 where it is carried away by the air stream.
  • the magnetic field hair generator 14 is provided with a dish-shaped induction coil 30, and the side close to the ceramic panel is thermally insulated 32.
  • the induction coil 30 is spirally wound by a wire bundle 38.
  • Cooling ribs 18 are attached to the bottom of the metal tray case to form a cooling passage 19 that passes through the induction cooker 10 along the central axis.
  • the pallet is screwed onto the cooling rib 18 so that the cooling passage 19 and the larger cooling zone 28 together form the air passage below the cooling body.
  • the bundle 38 is composed of several, preferably five to nine, and in the present embodiment, seven conductors 40 are twisted into one strand.
  • Each of the wires 40 is again five to nine, and in this embodiment, seven guide wires 39 are formed.
  • Each wire 40 is insulatively treated in a conventional manner, such as by a thermal resistance varnish coating.
  • the single guide wire 39 has a cross-sectional diameter of between 0.1 and 0.4 mm, preferably 0.2 mm. This diameter guide wire is suitable for current frequencies from 20 kHz to 30 kHz.
  • the optimum value d of the cross-sectional diameter of the guide wire 39 is between 1/4 and 3/4 of the base value.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)

Abstract

一种有高频感应线圈的电磁加热装置。感应线圈单根导丝的直径约为0.2毫米，这种直径的导丝被证明是低功率损耗的。电磁加热系统由放置加热容器的陶瓷面板、形状像碟子的感应线圈、散热装置、红外温度感应器组成。

Description

高效加热装置 技术领域
本发明涉及一种利用电磁感应加热器皿的装置。
现有电磁加热系统一般具有直接在器皿上产热的优势，即直接在被加热的炊具底部产热，实际的加热装置则保持低温。电磁加热系统的劣势是相对较高的耗电量和电子元件不易散热的问题。电子元件对于产生高频磁场并控制加热系统是必须的，但电子元件产生的散逸热和感应线圈的产热使得加热装置温度上升，这就要求改进加热系统，解决散热问题。同时，电磁炉高功率产生的较高用电量也是值得改进的部分。
根据德国E.Baum等学者的传统理论，导线的功率损耗由表层功率损耗和磁场造成的外部功率损耗构成。当感应线圈的导线截面直径减小时，导线功率损耗将减小，从而达到节能作用。通过对总功耗函数求导，得到使导线功率损耗最小的直径为 Pskin=0.5I0 2 R0βskin(γ0/δ )。
 技术问题
本发明的基本内容是提供一种低功率损耗、易散热、智能控温的电磁加热系统。
传统理论认为，感应线圈导线的直径在E.Baum等学者的理论最佳值基础上进一步减小是不恰当的，因为当导线截面直径进一步缩小，导线功率损耗进入递增区间，达不到降低能耗的作用。所以导线截面直径的基础值是感应线圈导线直径的下限。然而，实验发现：当感应线圈用于电磁加热系统时，更细的导线直径导致能耗的进一步减小。因此，本发明重新设计了导线直径，改进了散热装置，并加入温度感应器件，克服了电磁加热系统存在的高功率损耗、不易散热的问题。
 技术解决方案
本发明解决其技术问题所采用的技术方案：
根据实验数据，单根导线的直径介于E.Baum等学者的理论最佳值的1/4到3/4之间是最佳的。如果导线直径进一步减小，这在导线的生产上就会产生一定的困难，增加生产成本。因此，几根上述规格的导线拧成一股是机械生产上和电学原理上的最佳选择。
一般情况下，电磁加热系统尽可能地贴近被加热炊具下方。与此不同的是，本发明的另一重要特征就是感应线圈和承载炊具的陶瓷面板之间有一块热绝缘，使得热量不会从被加热炊具一侧迅速传导给感应线圈，保证感应线圈低温的效果。因此我们只需驱散感应线圈产生的少许热量，而这借助于风扇等冷却装置是很容易实现的。同时，本发明设计了完善的冷却通道，使得电子元件产生的散逸热不易积累。
因为加热是在电磁炉体之外实现的，即在被加热炊具上生热，电磁炉本身不会产生高温，所以现有标准下，温度测量器在电磁炉上并不作硬性要求。但是，热量可以从炊具上传导到陶瓷面板上，使得后者过热。而用传统的方法测量陶瓷面板的温度是很难实现的。因此，根据本发明，一种新型光学测量装置被用于检测陶瓷面板的温度。它包括一种红外线敏感器，例如硅光电二极管可以根据普朗克辐射定律来测量温度。在给定温度下，陶瓷面板的辐射波长在传感器的光谱灵敏度范围内，所以可量化的温度信号能被传感器捕捉到。根据维氏位移定律，随着陶瓷面板温度的上升，其辐射谱光谱辐射力的最大值也会上升。我们可以进一步利用这个信号关闭或调低加热系统的功率。
上述的陶瓷面板过热只可能发生在对加热系统操作不当的情况下，例如在面板上加热一口空锅，因此温度控制系统必须执行一个闸函数。例如当温度超过系统预先设定的值时，加热系统将保持关闭状态直到人工断开并重新连接电路，因为这意味着使用者已经发现空烧状态并处理了这个问题。而这一闸函数控制过程可以借助微型计算机等控制电子器件来实现。
 有益效果
本发明的有益效果是，可以使家庭中的电磁加热系统充分节约电能，使得绿色的生活理念在节能日益受到重视的今天得到充分体现。同时，系统实现了极低的热量积累、温度的智能控制，从而保证操作的安全性和便捷性。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是电磁加热系统的俯视图。
图2是图1中的A－A剖面图。
图3是图1中的B－B剖面图。
图4是构成感应线圈的一股导线的横截面图。
 本发明的最佳实施方式
在图1中，两个电磁炉10安装在陶瓷面板12上。临近中央开口35的位置装有光学传感器36，传感器穿过了感应线圈，用于检测陶瓷面板的辐射。由于被加热炊具的高温可能对陶瓷面板造成损害，有必要利用光学传感器36对陶瓷面板的温度进行测量从而调节功率。光学传感器36是一个红外检测器，其光谱灵敏度在红外线的范围内。根据维氏位移定律，随着陶瓷面板温度上升，其辐射谱光谱辐射力的最大值也会上升。光学传感器36是一个硅光电二极管，在预先设定安全温度范围内，陶瓷面板光谱辐射力的能量处于光学传感器的光谱灵敏度范围内，所以形成了可测的信号，这一信号被微型计算机处理后可用于调节加热功率或断开电磁加热系统。
在图2中，我们利用旋转钮26和功率调节器27实现对加热功率的调节，这些电子元件可以安装在陶瓷面板12之下，将其隐藏起来。金属片构成的托盘盒23两侧连接着铝制冷却体15。冷却体15的上方有凹槽29，凹槽中装有磁场生发器14。冷却体15下方有托板16，托板16形成了下机壳。陶瓷面板的短边24一侧留出了通风口25。通风口内侧的风扇17吸入空气，使其通过冷却通道和冷却区域后，将热量带出加热系统。因此，系统中的元件可以由空气流直接降温，或者将热量传导给冷却体15，再由空气流从冷却体带走热量。
在图3中，磁场生发器14中装有碟形的感应线圈30，靠近陶瓷面板的一侧是热绝缘32。感应线圈30由导线束38螺旋盘绕而成。冷却肋18连接在金属托盘盒的底部，从而形成冷却通道19，冷却通道沿着中轴穿过了电磁炉10。托板是用螺丝拧在冷却肋18上的，所以冷却通道19和更大的冷却区域28一起构成了冷却体下方的通风道。
在图4中，导线束38由几根，最好是五至九根，在本实施例中是七根导线40拧成一股。每根导线40又是由五至九根，在本实施例中是七根导丝39构成。每根导线40之间是用一般方法进行绝缘处理的，例如用热阻清漆涂层进行包裹。单根导丝39的截面直径介于0.1 到0.4 mm之间，最好是0.2mm。这一直径的导丝适用于20 kHz至 30 kHz的电流频率，对于其他频率的电流，应该遵循如下公式确定单根导丝直径的基础值 D=2(4.5)1/6π-5/6(kμ)-1/3(lsp/Nf)1/3 Cbp。导丝39截面直径的最佳值d介于基础值的1/4 到3/4之间。实验发现，用这样小直径的导丝，感应线圈的功率损耗将被大大降低。

Claims (8)

  1. 一种电磁加热系统，其特征是：系统由磁场发生装置、规定直径的导线构成的感应线圈、通风道、温度红外感应器构成。
  2. 根据权利要求 1 所述的电磁加热系统，其特征是：感应线圈的导线束由 5 至 9 根导线拧成绞合线。
  3. 根据权利要求 2 所述的电磁加热系统，其特征是：单根导丝的直径 d 是理论最佳值 D 的 1/4 到 3/4 。
  4. 根据权利要求 2 所述的电磁加热系统，其特征是：单根导丝的直径 d 介于 0.1mm 到 0.4 mm 之间。
  5. 根据权利要求 1 所述的电磁加热系统，其特征是：感应线圈安装在陶瓷面板之下，在感应线圈靠近陶瓷面板的一侧设有热绝缘，感应线圈远离陶瓷面板的一侧设有冷却体和通风道。
  6. 根据权利要求 1 所述的电磁加热系统，其特征是：感应线圈之下有温度红外感应器。
  7. 根据权利要求 6 所述的电磁加热系统，其特征是：温度红外感应器与陶瓷面板没有接触。
  8. 根据权利要求 7 所述的电磁加热系统，其特征是：温度红外感应器有特定的灵敏度范围，其范围是红外辐射范围。
PCT/CN2013/071750 2013-02-21 2013-02-21 高效加热装置 WO2014127518A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/071750 WO2014127518A1 (zh) 2013-02-21 2013-02-21 高效加热装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/071750 WO2014127518A1 (zh) 2013-02-21 2013-02-21 高效加热装置

Publications (1)

Publication Number Publication Date
WO2014127518A1 true WO2014127518A1 (zh) 2014-08-28

Family

ID=51390477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/071750 WO2014127518A1 (zh) 2013-02-21 2013-02-21 高效加热装置

Country Status (1)

Country Link
WO (1) WO2014127518A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5430273A (en) * 1992-03-14 1995-07-04 E.G.O. Elektro-Gerate Blanc U. Fischer Induction cooker heating system
JP2007319451A (ja) * 2006-06-01 2007-12-13 Matsushita Electric Ind Co Ltd 炊飯器
JP2009158147A (ja) * 2007-12-25 2009-07-16 Suzuki Kogyo Kk 誘導加熱コイル
CN101728079A (zh) * 2010-01-26 2010-06-09 美的集团有限公司 一种电磁加热线圈盘线圈绕组的加工方法
CN102932979A (zh) * 2012-11-08 2013-02-13 傅福兴 电磁加热系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5430273A (en) * 1992-03-14 1995-07-04 E.G.O. Elektro-Gerate Blanc U. Fischer Induction cooker heating system
JP2007319451A (ja) * 2006-06-01 2007-12-13 Matsushita Electric Ind Co Ltd 炊飯器
JP2009158147A (ja) * 2007-12-25 2009-07-16 Suzuki Kogyo Kk 誘導加熱コイル
CN101728079A (zh) * 2010-01-26 2010-06-09 美的集团有限公司 一种电磁加热线圈盘线圈绕组的加工方法
CN102932979A (zh) * 2012-11-08 2013-02-13 傅福兴 电磁加热系统

Similar Documents

Publication Publication Date Title
JP6021933B2 (ja) 誘導加熱調理器
EP2774454B1 (en) An induction heating cooker
WO2012035709A1 (ja) 誘導加熱調理器
JP2010244998A5 (zh)
US20220117306A1 (en) Dual-heating tobacco heater and heating method, and heated tobacco product
JP2011034712A (ja) 誘導加熱調理器
CN202567750U (zh) 一种感应测温电磁炉炊具
WO2014127518A1 (zh) 高效加热装置
WO2017000127A1 (zh) 用于微波炉的测温组件及具有其的微波炉
CN102932979A (zh) 电磁加热系统
KR20180023219A (ko) 전기 가열 조리기
CN109429399A (zh) 锅具防干烧的控制方法和装置、电磁炉
EP4005407A1 (en) High-frequency heating device
WO2022101462A1 (en) A cooking assembly
CN208579355U (zh) 过温保护装置和电磁炉
JPH01194284A (ja) 誘導加熱調理器
CN208871687U (zh) 一种安全型电磁炉
JP2011220868A (ja) 温度センサ
KR100235443B1 (ko) 유도가열밥솥의 냉각보온 장치 및 방법
JP3006588B2 (ja) 電気炊飯器
CN211930906U (zh) 嵌入式电磁炉防护装置
CN212117923U (zh) 烹饪器具
JP3215756U (ja) 電気加熱セラミックポット
CN207975696U (zh) 一种智能调节温湿度的电陶炉
CN208016237U (zh) 烹饪器具

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE