WO2008141490A1 - Dispositif de protection contre la surchauffe, réchauffeur électrique correspondant au dispositif de protection contre la surchauffe et réchauffeur à liquide correspondant - Google Patents

Dispositif de protection contre la surchauffe, réchauffeur électrique correspondant au dispositif de protection contre la surchauffe et réchauffeur à liquide correspondant Download PDF

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Publication number
WO2008141490A1
WO2008141490A1 PCT/CN2007/002363 CN2007002363W WO2008141490A1 WO 2008141490 A1 WO2008141490 A1 WO 2008141490A1 CN 2007002363 W CN2007002363 W CN 2007002363W WO 2008141490 A1 WO2008141490 A1 WO 2008141490A1
Authority
WO
WIPO (PCT)
Prior art keywords
overheat protector
electric heater
piece
actuator
contact
Prior art date
Application number
PCT/CN2007/002363
Other languages
English (en)
French (fr)
Inventor
Jizhong Zhu
Original Assignee
Ningbo Goodfriends Electric Appliance Co., Ltd
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 Ningbo Goodfriends Electric Appliance Co., Ltd filed Critical Ningbo Goodfriends Electric Appliance Co., Ltd
Priority to EP07785274.7A priority Critical patent/EP2161965A4/en
Priority to ZA2008/09914A priority patent/ZA200809914B/en
Publication of WO2008141490A1 publication Critical patent/WO2008141490A1/zh

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Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21016—Water-boiling vessels, e.g. kettles electrically heated with heating elements immersed in the water
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21058—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water
    • A47J27/21108—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water using a bimetallic element
    • 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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0213—Switches using bimetallic elements
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/78—Heating arrangements specially adapted for immersion heating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5418—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting using cantilevered bimetallic snap elements

Definitions

  • the present invention relates to a thermal induction controller, and more particularly to a thermal induction overheat protector applied to a liquid heater using an immersion electric heater, and to a liquid heater using the same. Background technique
  • Liquid heaters particularly liquid heaters such as electric kettles, typically require a control system to control the energization and de-energization of the appliance to control the temperature of the fluid.
  • the thermal sensing controller of mechanical structure is the most common and simple control system for controlling electrical continuity.
  • this thermal sensing controller is mounted with an electric heater for better thermal contact.
  • This heat sensitive controller is typically a collection of several functions, typically a vapor-type thermal sensor switch, a snap-on overheat protector made of a recoverable bimetallic material, and a plastic (or metal) fuse.
  • the electric heater and the thermal protector in the thermal sensor controller are generally mounted on the side of the electric water heater.
  • a known solution is to integrate a thermally sensitive vapor switch, a recoverable thermal overheat protector and a fuse fuse. And installing the overheat protector on the end face of the immersed electric heater. Under normal circumstances, the recoverable overheat protector ensures that the liquid heater operates after no water or water is dried, and the power supply path is cut off. The protector is required to accurately sense the dry burning state of the electric water heater, and can continue to be used after the consumer finds and corrects such misoperation, and the safety performance and service life of the appliance are not obvious. Damage.
  • the prior art solution basically places the heat-sensitive actuator on the thermal-sensing recoverable overheat protector in an area below the extraction rod of the immersion electric heater.
  • the end face of the immersion electric heater in contact with the bimetallic actuator is generally made of a material having a good thermal conductivity, such as a copper material.
  • the object of the present invention is to overcome the deficiencies of the prior art solutions in practical applications, and to provide a more complete and reliable temperature control scheme for avoiding dry burning of electric heaters, so as to solve the power failure protection of the liquid heater under abnormal conditions. , and make the overheat protection measures have a more reasonable response.
  • the invention provides a thermal induction overheat protector applied to an electric water heater, the overheat protector being installed in a cavity including a casing and a cover, the overheat protector comprising a bimetallic actuator,
  • the bimetallic actuator is mounted on an immersed electric heater on a vertically disposed end face, the bimetallic actuator being in thermal contact with the end face, the mounting position being higher than the area of the electric heater lead-out bar.
  • the bimetallic actuator is positioned above the take-up bar and is spaced a distance from the take-up bar. Thus, when the electric water heater is heated all the time, the liquid capacity in the container will gradually decrease. When the water level falls below the horizontal position where the recoverable thermal induction overheat protector is located, the temperature of the position felt by the overheat protector will be The rapid rise causes the bimetallic actuator to operate, while the position of the extraction rod of the electric heater is below the water surface.
  • the overheat protector further includes a rod body, a movable electrical connection piece, a fixed electrical connection piece and a power plug inserted through the cover body, wherein the side of the rod body is in contact with the Han metal actuator, and One side is connected to the movable electrical connecting piece, the fixed electrical connecting piece is connected to the power plug, and the movable electrical connecting piece and the fixed electrical connecting piece are formed in the power supply path by the movable contact and the static contact respectively disposed thereon A switch node, the free end of the movable electrical connection piece is in a touchable connection with an elastic bayonet device.
  • the elastic bayonet device is a spring piece, and one side of the elastic piece is provided with a folded edge which is angled, and the folded edge can be locked after the movable contact and the static contact are separated.
  • the electrical connecting piece has a touchable connection with a manual return machine through a touch bending edge.
  • the manual return mechanism includes a reset lever and a diagonal rib fixedly coupled thereto, and the reset lever is in a stable position through the diagonal rib and the touch bending edge of the elastic piece is contactably connected to realize the elastic piece Lift up the fold and lift it up.
  • the bimetallic actuator is resiliently mounted. Ensure that the bimetallic actuator is installed in electrical heating The smaller end of the end face of the device will automatically retract, ensuring that the bimetal actuator will not be deformed when it is installed in the actual production tolerance range, ensuring the temperature sensitivity of the Han metal actuator. .
  • the present invention also provides an immersed electric heater for use with the overheat protector, comprising a heat generating component, a vertically disposed fixed end face, two lead bars and a plurality of fixing posts, the upper end of the end face Providing a boss adapted to the bimetal actuator in a direction toward the bimetal actuator at a highest point of the heat generating component, wherein the heat generating component and the boss have good thermal conductivity The materials are joined together.
  • the present invention also provides a liquid heater including the overheat protector and the immersed electric heater.
  • the invention adopts an overheat protector installed on the upper end surface of the electric heater, which can cause the recoverable thermal induction overheat protector to operate before the immersion electric heater is dry, thereby cutting off the power supply path for the immersion electric heater The longevity and safety of the user is very advantageous.
  • BRIEF DESCRIPTION OF THE DRAWINGS Figure 2 is a front elevational view of the electric heater of the present invention.
  • Figure 3 is a side elevational cross-sectional view of the electric heater of the present invention.
  • FIG. 4 is a central cross-sectional view of the electric heater of the present invention and a thermal induction controller including the thermal protector of the present invention, and is also a schematic view of the components distribution when the overheat protector of the present invention is not in operation;
  • FIG. 5 is a view showing the overheat protection of the present invention.
  • FIG. 6 is a schematic view showing the distribution of components after the action of the overheat protector of the present invention (BB of FIG. 5; FIG. 5);
  • FIG. 7 is a manual reset of the overheat protector of the present invention.
  • Schematic diagram of the mechanism (AA of Figure 5)
  • Figure 8 is a schematic view of the structure of the shrapnel in the overheat protector. detailed description
  • the overheat protector 1 comprises a housing body 5, a cover 4, a bimetallic actuator 3, a fixing sleeve 8, a reset lever 6 and three latches 71, 72 for connecting the power supply. , 73 (72 is the pin for grounding).
  • the cover 4 has two holes 101, 102 for receiving the electric heater lead-out bars, and three mounting holes 161, 162, 163.
  • the bimetallic actuator 3 is fixed by a hollow annular fixing sleeve 8, at which point the bimetallic actuator 3 has a certain retraction Space.
  • the fixing sleeve 8 is fixed to the cover by two screws 91, 92. In the direction as shown, the bimetallic actuator 3 is disposed above the two holes 101, 102 for receiving the electric heater extraction rods.
  • the electric heater 2 includes a heat generating component 21, a vertically disposed fixed end face 22, two lead bars 231, 232, and three fixing posts 241, 242, 243.
  • the heating element 2 has good thermal contact with the boss 221 .
  • a boss 221 for fitting to the double metal actuator 3 is disposed above the two lead bars 231, 232.
  • the electric heater 2 passes through the three vias 161, 162, 163 of the thermal protector 1 and is secured to the thermal protector 1 by three setscrews 271 (the other two are not visible).
  • the bimetallic actuator 3 is in good thermal contact with the boss 221 on the electric heater 2.
  • the bimetal actuator 3 is in a ready state, and its arc is bulged toward the electric heater 2.
  • the center position of the bimetal actuator 3 contacts one end of the rod body 11.
  • the other end of the rod 11 is in contact with a movable elastic connecting piece 12 having a certain elasticity.
  • an electrical contact 141 i.e., a movable contact
  • the other electrical contact 142 i.e., the fixed contact
  • the movable electrical connection piece 12 and the fixed electrical connection piece 13 form a switch node in the power supply path through the electrical contacts 141, 142.
  • the bimetal actuator 3 is disposed at the highest point of the heat generating component 21 of the electric heater 2. Since the electric heater 1 has good thermal contact with the bimetal actuator 3, when the water in the container drops below the boss 221 of the electric heater 2, the temperature of the boss 221 rises sharply, triggering the bimetal Actuator 3. Thus, the heat generating component 21 on the horizontal surface of the lead-out bars 231, 232 of the electric heater 2 is still in the water, and does not cause overheating, thereby ensuring the life and safety of the heat generating component 21.
  • the fixed electrical connection piece 13 is connected to the pin 71 to connect the power source.
  • the other end of the movable electrical connection piece 12 is disposed under the hole 101, and is connected to an extraction rod 242 of the electric heater 2 by inserting the extraction rod 242 into the hole 101 shown in the drawing.
  • the other lead rod of the electric heater 1 is connected to the end of the plug 73 under the other hole 102 (there is an opening and junction in the middle, which is not within the scope of the present invention, so it is not broken down, and it is considered to be Connected together).
  • the electric heater 2 is energized when the two pins 71, 73 are energized, since the electrical contacts 141, 142 are now open. Thus the power supply path is closed and the power supply supplies power to the electric heater.
  • a spring piece 15 is provided at the free end of the movable electrical connecting piece 12, and the free end of the elastic piece 15 is disposed in a hole 51 in the casing body 5.
  • the bimetal actuator 3 is heated by the abnormal heating of the electric heater 2.
  • the action moves the rod 11 in the direction of the right side of the figure, and the other end of the rod body 11 moves the movable electrical connection piece 12 in the direction of the right side, so that the electrical contacts 141 disposed thereon are disposed at a fixed electric power.
  • the electrical contacts 142 on the tab 13 are disengaged, at which point the power supply path is broken.
  • the power supply to the electric heater 2 is interrupted, and the abnormal heating state is stopped.
  • a flange 151 is formed on the elastic piece 15 at a certain angle.
  • the movable electrical connecting piece 12 After the movable electrical connecting piece 12 is pushed toward the right side of the figure, after being separated from the fixed electrical connecting piece 13, the folded edge 151 is stuck at the free end of the movable electrical connecting piece 12, and the resetting lever 6 provided in an eccentric mechanism is in a stable position, at this time, even when the electric heater 2 is smashed due to the stop of the heating temperature, the bimetal When the actuator 3 is restored, the movable electrical connection piece 12 is also not reset and is connected to the fixed electrical connection piece 13. This avoids repeated abnormal heating.
  • the consumer finds that the electric heater 2 is abnormally heated, takes corresponding corrective measures, and moves the reset lever 6 to another stable position, and the elastic piece 15 is disposed at a position adjacent to the folded edge 151.
  • the bent edge 152 is touched.
  • a rib 61 provided on the reset lever 6 urges the bent side 152 a certain distance in the upward direction as shown.
  • the flange 151 connected to the touch bending edge 152 is also dialed a certain distance.
  • the free end of the jammed movable electrical connection piece 12 is released from the hem 151.
  • the free end of the movable electrical connecting piece 12 is moved to the right direction by the elastic restoring force of the movable connecting piece 12, so that the electrical contact 141 provided on the movable electrical connecting piece 12 and the fixed electrical edge piece 13 are disposed.
  • the electrical contacts 142 are in contact. Thereby, the power supply of the electric heater 2 is restored. Revert to the previous state to be triggered.
  • the above embodiment can make the overheat protector cut off the power supply before the immersion electric heater is dry, and then manually restore the to-be-triggered state, which is very advantageous for the life of the immersed electric heater and the safety of the user. .

Description

过热保护器、 与其相适配电加热器
及相应的液体加热器
技术领域
本发明涉及一种热敏感应控制器， 特别涉及一种应用到使用浸入式电加 热器的液体加热器的热敏感应过热保护器， 同时还涉及一种使用该方案的液 体加热器。 背景技术
液体加热器， 特别像电水壶等液体加热器一般需要一个控制系统来控制 电器的通电与断电， 从而控制液体温度。 在实际应用中机械结构的热敏感应 控制器是最常用、 最简单的一种控制电气通断的控制系统。 通常情况下这种 热敏感应控制器是与电加热器安装到一起， 以便得到更好的热接触。 这种热 敏感应控制器通常是几个功能的集合， 一般有蒸气式热敏感应开关、 可恢复 的双金属材料制成的突跳式过热保护器及塑料（或金属） 的熔断保险装置。 对于应用浸入式电加热器的液体加热器一般将电加热器及热敏感应控制器中 的过热保护器安装在电热水器的侧面。
对于将电加热器及热敏感应过热控制器安装在加热容器侧面的液体加热 器， 已知的方案是将热敏感应蒸气开关、 可恢复的热敏感应过热保护器及熔 断保险装置整合到一起， 并将所述的过热保护器安装在浸入式电加热器的端 面， 一般情况下， 可恢复的过热保护器是保证液体加热器在不加水或水被烧 干后动作， 切断供电通路。 这种保护器被要求成既能准确在感应到电热水器 的干烧状态， 又能满足在消费者发现并改正这种误操作后能继续使用， 并且 器具的安全性能和使用寿命不会有明显的损坏。
现有的技术方案基本上是将热敏感应可恢复过热保护器上的热感应致动 器设置在浸入式电加热器的引出棒以下的区域。 浸入式电加热器与双金属致 动器接触的端面一般是用导热性能较好的材料制成， 比如铜材料。 在实际使 用中，当热敏感应蒸气开关不能正常工作时， 液体加热器中的液体会一直沸腾 蒸发， 液体容量会' I"曼 '隄减少， 当水位降至可恢复的热敏感应过热保护器所处 的水平位置以下后， 过热保护器所感受的位置的温度就会迅速上升。 从而促 使可恢复的热敏感应过热保护器动作， 从而切断供电通路。 在这种情况下， 在过热保护器动作之前， 浸入式电加热器的一部分已经干烧了一定时间。 这 对于浸入式电加热器的寿命及使用者的安全是十分不利的。 同时， 由于现有 技术方案的电加热器在实际生产时引出棒与设在一个管体内部的发热丝的接 头处的电热丝相对分布的比较密， 电阻相对也比较大的。 在过热保护前如果 此处暴露在空气中进行了干烧， 会对电加热器的寿命及使用安全产生巨大的 危害。 发明内容
本发明的目的在于克服现有技术方案在实际应用中的不足， 提供一种避 免电加热器干烧的更完善、 更可靠的温度控制方案， 以解决液体加热器在异 常情况下的断电保护， 并使过热保护措施能有更合理的反应。
本发明提供了一种应用在电热水器上的热敏感应过热保护器， 所述的过 热保护器安装在包含壳体和盖体的腔体内， 所述过热保护器包括一个双金属 致动器， 所述双金属致动器安装于浸入式电加热器上成垂直设置的端面上， 所述双金属致动器与所述端面热接触， 该安装位置高于电加热器引出棒的区 域。
所述双金属致动器位置在高于引出棒的基础上， 可与引出棒相隔一定的 距离。 这样在电热水器一直加热时， 容器中的液体容量会慢慢减少， 当水位 降至可恢复的热敏感应过热保护器所处的水平位置以下后， 过热保护器所感 受的位置的温度就会迅速上升， 使所述的双金属致动器动作， 而此时电加热 器的引出棒位置还在水面以下。
所述过热保护器还包括穿设于所述盖体的棒体、 可活动电连接片、 固定 电连接片及电源插销， 其中所述棒体一侧与所述汉金属致动器接触， 另一侧 与可活动电连接片相连， 所述固定电连接片接于电源插销， 所述可活动电连 接片和固定电连接片通过分设其上的动触头和静触头形成供电通路中的一个 开关结点， 所述可活动电连接片的自由端与一个弹性卡销装置成可触碰连接。
所述弹性卡销装置为一个弹片， 所述弹片的一侧边设置一个翘起一定角 度的折边， 所述折边可在所述动触头和静触头分离后卡止所述可活动电连接 片， 弹片末端通过一个触动折弯边与一个手动回复机构成可触碰连接。
所述手动回复机构包括一个复位杆和与其固定连接的一个斜筋， 所述复 位杆在一个稳定位置上通过所述斜筋与所述弹片的触动折弯边可触碰连接， 实现所述弹片翘起折边上提。
所述双金属致动器为弹性安装。 保证所述的双金属致动器安装在电加热 器的端面上时会自动回缩一个比较小的尺寸， 保证所述的双金属致动器在实 际生产的公差范围内进行安装公司时不会被压变形， 保证汉金属致动器的温 度灵敏度。
本发明还提供了一种与所述过热保护器配合使用的浸入式电加热器， 包 括一个发热元件、 一个垂直设置的固定端面、 两个引出棒及多个固定柱， 所 述的端面的上部在发热元件的最高处朝向所述双金属致动器的方向设有一个 与所述的双金属致动器相适配的凸台， 所述的发热元件与所述的凸台用导热 性能良好的材料连接成一体。
本发明还提供了一种包括所述过热保护器和所述浸入式电加热器的液体 加热器。
本发明采用了安装在电加热器端面上部的过热保护器， 可促使该可恢复 的热敏感应过热保护器在浸入式电加热器干烧之前动作， 从而切断供电通路， 对于浸入式电加热器的寿命及使用者的安全是非常有利的。 附图说明 图 2为本发明电加热器的主视图；
图 3为本发明电加热器的侧向中心剖视图；
图 4为本发明电加热器与包含本发明过热保护器的热敏感应控制器安装 后的中心剖视图， 同时也是本发明过热保护器未动作时的部件分布示意图； 图 5为包含本发明过热保护器的热敏感应控制器在未装盖体时的主视图； 图 6为本发明过热保护器动作后的部件分布示意图 （图 5的 B-B剖；)； 图 7为本发明过热保护器手动复位机构的示意图 （图 5的 A-A ), 图 8为过热保护器中弹片的结构示意图。 具体实施方式
下面结合附图对具体实施方式加以说明。
从图 1中可以看出， 过热保护器 1包括一个外壳本体 5、 一个盖体 4、 一 个双金属致动器 3、 一个固定套 8、 一个复位杆 6及三个连接电源的插销 71、 72、 73 (其中 72是接地用的插销）。 其中盖体 4上有两个接纳电加热器引出 棒的孔 101、 102 , 还有三个安装用的过孔 161、 162、 163。 双金属致动器 3 通过一个中空的圓环形的固定套 8 固定， 此时双金属致动器 3有一定的回缩 空间。 固定套 8通过两个螺丝 91、 92固定在所述盖体上。在如图所示的方向， 双金属致动器 3设置在两个用于接纳电加热器引出棒的孔 101、 102的上方。
从图 2和图 3中可以看出， 电加热器 2包括一个发热元件 21、 一个垂直 设置的固定端面 22、 两个引出棒 231、 232和三个固定柱 241、 242、 243。 在 端面 22的上部有一个与双金属致动器 3相适配的凸台 221， 朝向双金属致动 器一侧， 发热元件 2与凸台 221用导热性能良好的材料 251连接成一体。 这 样发热元件 2与凸台 221有良好的热接触。 在如图所示的方向， 用于与双金 属致动器 3相适配的凸台 221设置在两个引出棒 231、 232的上方。
结合图 1和图 4可以看出， 电加热器 2从过热保护器 1的三个过孔 161、 162、 163穿过并用三个固定螺丝 271 (另两个不可见）与过热保护器 1 固定 在一起， 此时， 双金属致动器 3与电加热器 2上的凸台 221 良好热接触。 此 时， 双金属致动器 3处于待发状态， 它的弧度是鼓向电加热器 2的。 双金属 致动器 3的中心位置接触棒体 11的一端。 棒体 11的另一端接触到有一定弹 性的可活动电连接片 12。在可活动电连接片 12的自由端上设置一电触头 141， 即动触头； 另一个电触头 142， 即静触头设置在一个固定电连接片 13上。 可 活动电连接片 12与固定电连接片 13通过电触头 141、 142形成供电通路中的 一个开关结点。 从此图还可以看到， 双金属致动器 3是设置在电加热器 2的 发热元件 21的最高处。 由于电加热器 1与双金属致动器 3有良好的热接触， 故当容器中的水降低至电加热器 2的凸台 221 以下时， 凸台 221的温度就会 急骤上升， 触发双金属致动器 3。 这样电加热器 2的引出棒 231、 232所在水 平面上的发热元件 21还处于水中， 不会引起过热， 保证发热元件 21的寿命 和使用安全。
图 5中部件盖体及安装在盖体上的部件被隐藏， 以看到内部部件的分布。 从图中可看出， 固定电连接片 13与插销 71连接在一起， 可连接电源。 可活 动电连接片 12的另一端设置在孔 101下， 与电加热器 2的一个引出棒 242通 过将引出棒 242插入图中所示的孔 101 中连接在一起。 电加热器 1的另一个 引出棒与另一个孔 102下的插销 73的未端连接在一起（中间有一个开并结点， 此处未在本发明范围内， 故不做分解， 认为其是连接在一起的）。 这样在两个 插销 71、 73通电的情况下电加热器 2通电， 由于此时电触头 141、 142是接 通的。 这样供电通路闭合， 电源给电加热器供电。 在可活动电连接片 12的自 由端设置一个弹片 15，弹片 15的自由端设置在外壳本体 5上的一个孔 51中。
从图 6中可看出， 此时双金属致动器 3因感受电加热器 2的异常加热而 动作， 使棒体 11向如图右侧方向移动， 棒体 11的另一端使可活动电连接片 12向如图右侧方向移动， 致使设置在其上的电触头 141与设置在固定电连接 片 13上的电触头 142脱离，这时断开供电通路。电加热器 2的电源供给中断， 异常加热状态停止。 同时在弹片 15上设有一个翘起一定角度的折边 151 , 在 可活动电连接片 12被推向如图右侧方向， 与所述的固定电连接片 13脱离后， 所述的折边 151卡住可活动电连接片 12的自由端， 此时设在一个偏心机构中 的复位杆 6在一个稳定位置， 这时， 即使当电加热器 2因为停止加热温度下 P争后， 双金属致动器 3恢复， 可活动电连接片 12也不会复位与固定电连接片 13接通。 从而避免了重复的异常加热。
从图 7中可看出， 此时是消费者发现电加热器 2的异常加热， 采取相应 的改正措施并将复位杆 6拨向另一个稳定位置， 弹片 15在折边 151附近相连 位置设置一个触动折弯边 152。 设在复位杆 6上的一个斜筋 61将触动折弯边 152向如图向上的方向拨动一定的距离。与触动折弯边 152相连的折边 151同 时也被拨动一定的距离。 使被卡住的可活动电连接片 12 的自由端脱离折边 151。 可活动电连接片 12 的自由端在自身弹性的回复力作用下向如图右边方 向移动， 使设于可活动电连接片 12上的电触头 141与设在固定电边接片 13 上的电触头 142接触。 从而恢复电加热器 2的电源供给。 恢复到以前的待触 发状态。 通过以上的实施方式可使过热保护器在浸入式电加热器干烧之前， 切断电源供应， 之后通过手动实现恢复待触发状态， 对于浸入式电加热器的 寿命及使用者的安全是非常有利的。 描述的技术方案， 因此， 尽管本说明书参照上述的具体实施方式对本发明已 进行了详细的说明， 但是， 本领域的普通技术人员应当理解， 仍然可以对本 发明进行修改或等同替换， 而一切不脱离本发明的精神和范围的技术方案及 其改进， 其均应涵盖在本发明的权利要求范围中。

Claims

权 利 要 求
1、一种应用在液体加热器上的热敏感应过热保护器，所述过热保护器安 装在包含壳体和盖体的腔体内， 包括一个双金属致动器， 所述汉金属致动器 安装于浸入式电加热器上成垂直设置的端面上， 所述双金属致动器与所述端 面热接触， 其特征在于所述安装位置高于电加热器引出棒。
2、如权利要求 1所述的过热保护器，其特征在于所述过热保护器还包括 穿设于所述盖体的棒体、 可活动电连接片、 固定电连接片及电源插销， 其中 所述棒体一侧与所述双金属致动器接触， 另一侧与可活动电连接片接触， 所 述固定电连接片与电源插销电连接， 所述可活动电连接片和固定电连接片通 过分设其上的动触头和静触头形成供电通路中的一个开关结点， 所述可活动 电连接片的自由端与一弹性卡销装置成可触碰连接。
3、如权利要求 2所述的过热保护器，其特征在于所述弹性卡销装置为一 个弹片， 所述弹片的一侧边设置一个翘起一定角度的折边， 所述折边可在所 述动触头和静触头分离后卡止所述可活动电连接片， 所述弹片末端通过一个 触动折弯边与一个手动回复机构成可触碰连接。
4、如权利要求 3所述的过热保护器，其特征在于所述手动回复机构包括 一个复位杆和与其固定连接的一个斜筋， 所述复位杆在一个稳定位置上通过 所述斜筋与所述弹片的触动折弯边成可触碰连接， 使所述弹片的折边上提。
5、如权利要求 1所述的过热保护器，其特征在于所述双金属致动器为弹 性安装。
6、一种与权利要求 1所述过热保护器配合使用的浸入式电加热器， 包括 一个发热元件、 一个垂直设置的固定端面、 两个引出棒及多个固定柱， 其特 征在于所述端面的上部在发热元件的最高处朝向所述汉金属致动器的方向设 有一与所述的双金属致动器相适配的凸台， 所述的发热元件与所述的凸台用 导热性能良好的材料连接成一体。
7、 一种液体加热器， 包括带有电气电路的主体， 其特征在于所述主体包 括权利要求 1所述过热保护器和权利要求 6所述的浸入式电加热器。
PCT/CN2007/002363 2007-05-21 2007-08-07 Dispositif de protection contre la surchauffe, réchauffeur électrique correspondant au dispositif de protection contre la surchauffe et réchauffeur à liquide correspondant WO2008141490A1 (fr)

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EP07785274.7A EP2161965A4 (en) 2007-05-21 2007-08-07 OVERHEAT PROTECTION DEVICE, MATCHING ELECTRIC HEATING DEVICE WITH OVERHEAT PROTECTION DEVICE AND CORRESPONDING LIQUID HEATING DEVICE
ZA2008/09914A ZA200809914B (en) 2007-05-21 2008-11-20 Overheat protector, electric heater accommodating the same and corresponding liquid heater

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CNB2007101075503A CN100567844C (zh) 2007-05-21 2007-05-21 过热保护器、与其相适配电加热器及相应的液体加热器
CN200710107550.3 2007-05-21

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CN101086391A (zh) 2007-12-12

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