CN203910714U - 超温过载瞬间突跳的负载保护装置 - Google Patents
超温过载瞬间突跳的负载保护装置 Download PDFInfo
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- CN203910714U CN203910714U CN201420291151.2U CN201420291151U CN203910714U CN 203910714 U CN203910714 U CN 203910714U CN 201420291151 U CN201420291151 U CN 201420291151U CN 203910714 U CN203910714 U CN 203910714U
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- RZVAJINKPMORJF-UHFFFAOYSA-N p-acetaminophenol Chemical compound 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CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
Abstract
一种超温过载瞬间突跳的负载保护装置,该保护装置设有一侧敞口的外壳,在外壳的敞口端连接有发热板,该发热板与外壳的接触部位由绝缘体隔开,发热板内侧连接有双金属片,该双金属片的自由端端部设有动触点,与动触点相对应的外壳内侧设有静触点,外壳的一侧设有连接电源线的输入端接线端子,发热板的一端设有与负载连接的输出端接线端子。当负载出现短路或过载时,电流变化使得所述发热板瞬间发热,并将热量迅速传递到双金属片,使得双金属片迅速感温变形而瞬间弹起,从而在过载时切断电路;当环境温度升高到双金属片的设定温度时,双金属片动作,从而在超温时断开电路。本实用新型的保护装置感温迅速,反应灵敏,可控性强,可有效保证负载用电安全。
Description
【技术领域】
[0001] 本实用新型涉及电器的过载超温保护装置,特别是涉及一种可快速反应的超温过 载瞬间突跳的负载保护装置。 超温过载瞬间突跳的负载保护装置 【背景技术】
[0002] 在现代生活中,人们广泛使用着各种各样的电器类设备。用电设备的元器件或电 子线路常因过载、超温等原因造成断路、过热甚至损毁,从而影响设备的正常使用。为此, 一般的电器或电子设备均设有温度开关或温控器,以使得在设备温度超过正常值时断开电 源,保护设备安全。然而,虽然现有的电流与温度保护器中使用了双金属片作为感温开关器 件,但由于其发热体采用电热丝等器件,使之发热慢,发热效率低,并因此导致短路突跳的 功能较弱,短路后需较长时间双金属片才能够断开,因此这类安全保护器件的安全保护性 较差。 【发明内容】
[0003] 本实用新型旨在解决上述问题,而提供一种感温迅速,反应灵敏,可控性强,可有 效保证负载用电安全的超温过载瞬间突跳的负载保护装置。
[0004] 为实现上述目的,本实用新型提供一种超温过载瞬间突跳的负载保护装置,该保 护装置设有一侧敞口的外壳,在所述外壳的敞口端连接有发热板,该发热板与外壳的接触 部位由绝缘体隔开,所述发热板内侧连接有双金属片,该双金属片的自由端端部设有动触 点,与该动触点相对应的外壳内侧设有静触点,所述外壳的一侧设有向外延伸的连接电源 线的输入端接线端子,所述发热板的与所述输入端接线端子对应的一端设有与负载连接的 输出端接线端子,且
[0005] 当负载出现短路或过载时,电流变化使得所述发热板瞬间发热,并将热量迅速传 递到双金属片,使所述双金属片迅速感温而瞬间弹起,从而在过载时切断电路;当环境温度 升高到双金属片的设定温度时,双金属片动作,从而在超温时断开电路。
[0006] 所述发热板是由电热合金材料制成的板状发热体,在发热板上间隔地设有多个用 于控制发热量的条形通孔。
[0007] 发热板的发热量通过调整所述通孔的尺寸、形状或数量加以控制。
[0008] 所述电热合金材料为铁铬铝合金或镍铬合金。
[0009] 所述绝缘体为绝缘纸。
[0010] 在所述发热板上设有向内侧凸起的突出部,所述双金属片的端部通过固定块固接 在所述突出部与固定块之间。
[0011] 所述静触点焊接或铆接固定在与所述动触点相对应的外壳内侧。
[0012] 本实用新型的贡献在于,其有效解决了现有温度开关或温控器短路突跳的功能 弱,安全保护性差等问题。本实用新型由于设置了板状发热体,因此发热面积及发热量更 大,发热更均衡,使得双金属片感温更加迅速,实现了在出现超温过载时的瞬间突跳,因而 提高了保护装置的可控性和安全性。本实用新型还可通过板状发热体上的通孔的形状大小 及数量来精准控制发热量的大小,因而可有效配合双金属片精准控制过载保护时间,起到 更好的保护作用。 【附图说明】
[0013] 图1是本实用新型的实施例1结构剖视图。
[0014] 图2是图1的俯视图。
[0015] 图3是本实用新型的发热板结构示意图。 【具体实施方式】
[0016] 下列实施例是对本实用新型的进一步解释和说明,对本实用新型不构成任何限 制。
[0017] 参阅图1,本实用新型的超温过载瞬间突跳的负载保护装置100包括外壳10、发热 板20、绝缘体30及双金属片40,该装置可连接在外部电源与负载之间,或串接在负载内的 电源输入端,用于当负载在运行过程中电流或温度超过设定值时切断电路,以保护用电设 备。所述的负载可以是家用电器或其它用电设备。
[0018] 如图1、图2所示,该超温过载瞬间突跳的负载保护装置100设有一侧敞口的外壳 10,该外壳为长方体形的导电金属外壳,在其一侧设有向外延伸形成的输入端接线端子11, 其用于连接电源线。在所述外壳10的敞口端用螺钉连接有与该敞口端的形状与尺寸相对 应的发热板20,该发热板20是由电热合金材料制成的板状发热体,本实施例中,所述电热 合金材料为铁铬铝合金或镍铬合金。本实用新型中,该发热体是一个与外壳纵向截面面积 相同的板状电热合金发热体,其大幅增加了发热体的发热面积更大,并且使热量分布更加 均衡。如图3所示,为了对该发热体的发热量进行精准控制,在发热板20上间隔地设有多 个条形通孔21,通过调整所述通孔21的尺寸、形状或数量,可对所述发热板20的发热量 进行精准控制,该通孔21的尺寸、形状或数量的具体数值可通过设计和试验加以确定和调 整。本实施例中,在发热板20中部沿发热板的宽度方向间隔地排列有三个条状通孔21,很 显然,通孔21的尺寸、形状或数量并不局限于此,其可根据设计参数加以调整。如图1所 示,在所述发热板20与外壳10的接触部位装有绝缘体30,其将发热板20与外壳10绝缘隔 离。本实施例中,所述绝缘体30为绝缘纸,很显然,它也可以是其它绝缘材料。如图1、图2 所示,在所述发热板10上与外壳的输入端接线端子11对应的一端设有输出端接线端子12, 用于和负载相连接。
[0019] 如图1,在所述发热板20内侧连接有双金属片40,它是可随温度变化膨胀变形的 感温用的金属片。本实施例中,该双金属片40是由镍锰合金制成的条形片状体。该双金属 片40的一端固定在所述发热板20内侧,如图1,在所述发热板20上设有向内侧凸起的突 出部22,所述双金属片40的端部通过固定块43焊接固接在该突出部22上。该双金属片 40的另一端为自由端,其自由端端部铆接或焊接固定有动触点41。在外壳10上与所述动 触点41相对应的位置设有一向内转折的转折部,在该转折部内侧固定有静触点42,所述静 触点42焊接或铆接固定在该转折部内侧。本实施例中,所述动触点41和静触点42为银 合金触点。在负载温度和电流处于正常工作状态时,所述动触点41和静触点42接触闭合, 保护装置100与负载之间处于导通状态。当负载温度和电流达到设定值时,双金属片40受 热变形而弹起,使得动触点41与静触点42相脱离,保护装置100与负载之间电路处于断开 状态。
[0020] 本实用新型的工作原理如图1所示,当负载出现短路或过载时而导致电流过大 时,电流变化使得所述发热板20瞬间发热,并将热量迅速传递到双金属片40,使得双金属 片40迅速感温变形而瞬间弹起,并与静触点42分离,达到瞬间断开的效果,从而在短路或 过载时切断电路。在另一种情况下,当环境温度升高到双金属片40的设定温度时,也使得 双金属片40迅速感温变形而瞬间弹起,从而在超温时断开电路。
[0021] 藉此,本实用新型通过设置大面积的板状发热体,并可对发热板的发热量进行精 准控制,使得当负载出现短路或过载时而导致电流过大时,所述发热板20瞬间发热,并将 热量迅速传递到双金属片40,使得双金属片40迅速感温变形而瞬间弹起,并与静触点42分 离,达到瞬间断开的效果,从而在短路或过载时切断电路,因此可有效保证负载在超温或过 载时的用电安全性。
[0022] 尽管通过以上实施例对本实用新型进行了揭示,但本实用新型的保护范围并不局 限于此,在不偏离本实用新型构思的条件下,对以上各构件所做的变形、替换等均将落入本 实用新型的权利要求范围内。
Claims (7)
1. 一种超温过载瞬间突跳的负载保护装置,其特征在于,该保护装置(100)设有一侧 敞口的外壳(10),在所述外壳(10)的敞口端连接有发热板(20),该发热板(20)与外壳 (10)的接触部位由绝缘体(30)隔开,所述发热板(20)内侧连接有双金属片(40),该双金 属片(40)的自由端端部设有动触点(41),与该动触点(41)相对应的外壳内侧设有静触点 (42),所述外壳(10)的一侧设有向外延伸的连接电源线的输入端接线端子(11),所述发 热板(20)的与所述输入端接线端子(11)对应的一端设有与负载连接的输出端接线端子 (12),且 当负载出现短路或过载时,电流变化使得所述发热板(20)瞬间发热,并将热量迅速传 递到双金属片,使所述双金属片(40)迅速感温而瞬间弹起,从而在过载时切断电路;当环 境温度升高到双金属片(40)的设定温度时,双金属片(40)动作,从而在超温时断开电路。
2. 如权利要求1所述的超温过载瞬间突跳的负载保护装置,其特征在于,所述发热板 (20)是由电热合金材料制成的板状发热体,在发热板(20)上间隔地设有多个用于控制发 热量的条形通孔(21)。
3. 如权利要求2所述的超温过载瞬间突跳的负载保护装置,其特征在于,所述发热板 (20)的发热量通过调整所述通孔(21)的尺寸、形状或数量加以控制。
4. 如权利要求3所述的超温过载瞬间突跳的负载保护装置,其特征在于,所述电热合 金材料为铁铬铝合金或镍铬合金。
5. 如权利要求1所述的超温过载瞬间突跳的负载保护装置,其特征在于,所述绝缘体 (30)为绝缘纸。
6. 如权利要求1所述的超温过载瞬间突跳的负载保护装置,其特征在于,在所述发热 板(20)上设有向内侧凸起的突出部(22),所述双金属片(40)的端部通过固定块(43)固接 在所述突出部(22)与固定块(43)之间。
7. 如权利要求1所述的超温过载瞬间突跳的负载保护装置,其特征在于,所述静触点 (42)焊接或铆接固定在与所述动触点(41)相对应的外壳(10)内侧。
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