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CN-121986387-A - Electronic contactor

CN121986387ACN 121986387 ACN121986387 ACN 121986387ACN-121986387-A

Abstract

The invention discloses an electronic contactor. An electronic contactor according to an aspect of the present invention includes a housing having a housing space formed therein, an energizing portion electrically connectable to an external power source or load, coupled to the housing such that at least a portion of the energizing portion is exposed to the outside of the housing, and a temperature sensing device coupled to the housing such that at least a portion of the temperature sensing device is exposed to the outside of the housing, the temperature sensing device being disposed adjacent to and spaced apart from the energizing portion, sensing heat generated by the energizing portion, the temperature sensing device including a support member coupled to the housing and received in the housing space, a temperature sensing member coupled to the support member and sensing the heat, and a temperature sensing terminal coupled to the support member and electrically connectable to the temperature sensing member, at least a portion of the temperature sensing terminal being exposed to the outside of the housing.

Inventors

  • Nan Chenggui

Assignees

  • LS电动科技株式会社

Dates

Publication Date
20260505
Application Date
20240828
Priority Date
20231211

Claims (15)

  1. 1. An electronic contactor, comprising: A housing having a housing space formed therein, An energizing unit which is electrically connectable to an external power source or load, is coupled to the housing such that at least a part of the energizing unit is exposed to the outside of the housing, and A temperature sensing device coupled to the housing such that at least a portion of the temperature sensing device is exposed outside the housing, the temperature sensing device being disposed adjacent to and spaced apart from the energizing portion, and sensing heat generated by the energizing portion; The temperature sensing device includes: a support member coupled to the housing and accommodated in the housing space, A temperature sensing member coupled with the support member, sensing the heat, and And a temperature sensing terminal coupled to the support member, and electrically connectable to the temperature sensing member, wherein at least a portion of the temperature sensing terminal is exposed outside the housing.
  2. 2. The electrical contactor of claim 1, wherein the electrical contacts are electrically connected to the electrical contacts, The housing includes: a support step portion for supporting the support member on one side in the height direction, A molding space surrounded by the support step portion, the temperature sensing member being located in the molding space, and And a communication opening portion recessed in a part of the support step portion and extending between the molding space and the energizing portion to constitute a passage for the heat transfer.
  3. 3. The electrical contactor according to claim 2, wherein, The communication opening portion is formed such that a cross-sectional area of the communication opening portion decreases in a direction from the energizing portion toward the temperature sensing member.
  4. 4. The electrical contactor according to claim 2, wherein, The housing includes: And a supporting member accommodating space recessed in the inner surface of the housing and positioned at one side of the supporting step part in the height direction for accommodating the supporting member.
  5. 5. The electrical contactor of claim 4, wherein the electrical contacts are electrically connected to the electrical contacts, The support step portion is configured to surround the support member accommodating space from the outside in the horizontal direction and extend, and to support a portion of the support member adjacent to the outer periphery of the support member.
  6. 6. The electrical contactor of claim 4, wherein the electrical contacts are electrically connected to the electrical contacts, The housing includes: and a supporting protrusion protruding from an inner surface of the housing surrounding the supporting member receiving space and supporting the supporting member at an outer side in a horizontal direction.
  7. 7. The electrical contactor of claim 6, wherein the electrical contacts are electrically connected to the electrical contacts, The support protrusions are provided in plurality, and the plurality of support protrusions are arranged to be spaced apart from each other in one direction and another direction perpendicular to the one direction to support the support member at a plurality of positions.
  8. 8. The electrical contactor of claim 4, wherein the electrical contacts are electrically connected to the electrical contacts, The housing includes: a molding column located in the support member receiving space and extending in a direction opposite to the inner surface of the case, the molding column undergoing a phase change due to heat or pressure; the support member includes: And a support through hole formed through the support member, wherein the molding column penetrates the support through hole.
  9. 9. The electrical contactor according to claim 8, wherein, A molding center hole into which a welding tip for applying the heat or the pressure is inserted is formed in the inner recess of the molding pillar.
  10. 10. The electrical contactor of claim 1, wherein the electrical contacts are electrically connected to the electrical contacts, The temperature sensing device is positioned at a position biased to one side of the length direction of the housing, The housing includes: a terminal receiving groove concavely formed on an inner surface of the one side for receiving the temperature sensing terminal, and A pair of terminal supporting parts configured to protrude at the inner surface of the one side, extend in the height direction of the housing, and face each other across the terminal accommodating groove in the width direction of the housing to support the temperature sensing terminal.
  11. 11. The electrical contactor of claim 1, wherein the electrical contacts are electrically connected to the electrical contacts, The support member includes: a terminal through hole formed in the support member and A circuit pattern extending between the temperature sensing member and the terminal through hole; The temperature sensing terminal is inserted into the terminal through hole to be electrically connected to the circuit pattern.
  12. 12. The electrical contactor of claim 11, wherein the electrical contacts are electrically connected to the electrical contacts, The temperature sensing terminal includes: A terminal body coupled to the housing and extending in a height direction of the housing, A terminal head portion continuous with one end portion of the terminal main body in the height direction and extending in the length direction of the housing, supporting the supporting member, and And a support member coupling portion continuous with the terminal head portion and extending in a height direction of the housing to be inserted into the terminal through hole.
  13. 13. The electrical contactor of claim 12, wherein the electrical contacts are electrically connected to the electrical contacts, The temperature sensing terminal includes: And a terminal tail portion continuous with the other end portion of the terminal main body in the height direction and extending in the length direction of the housing, at least a part of the terminal tail portion being exposed outside the housing.
  14. 14. The electrical contactor of claim 1, wherein the electrical contacts are electrically connected to the electrical contacts, The energizing unit includes: And an energizing terminal at least a part of which is exposed to one side of the outside of the housing so as to be electrically connectable to the outside.
  15. 15. The electrical contactor of claim 14, wherein the electrical contacts are electrically connected to the electrical contacts, The temperature sensing terminal includes: And a terminal tail portion extending in a longitudinal direction of the housing, at least a portion of the terminal tail portion being exposed at the one side of an exterior of the housing.

Description

Electronic contactor Technical Field The present invention relates to an electronic contactor, and more particularly, to an electronic contactor capable of accurately sensing a temperature of an energized portion without affecting an energized state with the outside. Background The dc relay (Direct current relay) is a device that uses the electromagnet principle to transmit mechanical drive or current signals. Dc relays, also known as magnetic switches (MAGNETIC SWITCH), are generally classified as circuit switching devices. The direct current relay includes a fixed contact and a movable contact. The fixed contact is electrically connectable to an external power source and load. The fixed contact and the movable contact may be in contact with each other or separated from each other. Energizing through the dc relay is allowed or blocked depending on the contact and separation of the fixed contact from the movable contact. The movement is achieved by a driving section that applies a driving force to the movable contact. The fixed contact and the movable contact are made of a material capable of being energized. As the fixed contact contacts the movable contact and is energized, the fixed contact heats up. In this case, if overheat occurs, the contact portion between the fixed contact and the movable contact may be melted or damaged, and the contact reliability between the fixed contact and the movable contact may be lowered. Therefore, there is a need for a scheme capable of sensing heat generated at the fixed contact (precisely, the temperature of the fixed contact) in real time and taking appropriate measures such as blocking energization when the fixed contact is overheated. Korean patent publication No. 10-2269380 discloses a temperature measuring instrument for an electronic contactor and a temperature monitoring system using the same. Specifically, a temperature measuring instrument for an electronic contactor and the like are disclosed, in which the temperatures of a supply side connection terminal and a load side connection terminal of an electronic contactor are measured by using a separate temperature measuring instrument for an electronic contactor, and the occurrence or non-occurrence of abnormal temperature is judged by using the measured values. However, the temperature measuring instrument for an electronic contactor and the like disclosed in the prior art document are provided separately from the electronic contactor. That is, the prior art document fails to provide a solution in which a device for sensing the contact temperature is directly arranged in an electronic contactor. Japanese patent publication 6005490 discloses a method for evaluating the temperature of an electronic contactor and a contactor for implementing the method. Specifically, a method of predicting the temperature of a magnetic core using a measured current value is disclosed, the method having means for measuring the current applied to an operating magnetic core of a contactor without the need for an additional sensor. However, the evaluation method of the temperature of the electronic contactor disclosed in the prior document and the contactor using the same cannot provide a solution for directly measuring the contact temperature. The temperature evaluation method disclosed in the above-mentioned prior art document predicts the temperature by using the current value applied to the core. Therefore, if the measured current value is disturbed by various factors, there is a concern that the accuracy of the measured temperature is lowered. Furthermore, the prior art document fails to provide a solution for accurately sensing the contact temperature without affecting the performance of the electronic contactor. Korean patent document No. 10-2269380 (2021, 06, 21) Japanese patent document No. 6005490 (2016, 09, 16) Disclosure of Invention Problems to be solved by the invention The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electronic contactor having a structure capable of accurately measuring a contact temperature. Another object of the present invention is to provide an electronic contactor having a structure which is provided for measuring temperature and which does not affect the current-carrying state. Still another object of the present invention is to provide an electronic contactor of a structure that can measure the temperature of contacts using various methods. Still another object of the present invention is to provide an electronic contactor having a structure which is provided for measuring temperature and is not exposed to the outside. Still another object of the present invention is to provide an electronic contactor configured to be easily electrically connected to each other, which is provided for measuring temperature. Still another object of the present invention is to provide an electronic contactor having a structure capable