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WO2022050525A1 - Dispositif de compensation de température et relais de surcharge thermique comportant ce dernier - Google Patents

Dispositif de compensation de température et relais de surcharge thermique comportant ce dernier Download PDF

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Publication number
WO2022050525A1
WO2022050525A1 PCT/KR2021/002811 KR2021002811W WO2022050525A1 WO 2022050525 A1 WO2022050525 A1 WO 2022050525A1 KR 2021002811 W KR2021002811 W KR 2021002811W WO 2022050525 A1 WO2022050525 A1 WO 2022050525A1
Authority
WO
WIPO (PCT)
Prior art keywords
extension
bimetal
link
compensating
temperature compensation
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2021/002811
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English (en)
Korean (ko)
Inventor
이경구
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LS Electric Co Ltd
Original Assignee
LS Electric 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 LS Electric Co Ltd filed Critical LS Electric Co Ltd
Publication of WO2022050525A1 publication Critical patent/WO2022050525A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/162—Electrothermal mechanisms with bimetal element with compensation for ambient temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element

Definitions

  • the present invention relates to a temperature compensation mechanism and a thermal overload relay including the same, and more particularly, to a temperature compensation mechanism having a structure capable of minimizing the effect of a temperature change in the surrounding environment at an installed location, and a thermal overload relay including the same It's about relays.
  • a thermal overload relay is a device constituting a magnetic switch together with a magnetic contactor.
  • the thermal overload relay performs a role of preventing damage to the motor by blocking the conduction between the power source and the load when an overload or overcurrent in which the current supplied to the motor such as a motor is greater than or equal to a preset size occurs.
  • alternating current of three phases (R-phase, S-phase, T-phase) is generally energized. At this time, when any one or more of the three-phase alternating current is arbitrarily cut off, the current may be concentrated in the remaining phase. Accordingly, overload and temperature rise may occur, which may damage the motor.
  • the motor is provided with a thermal overload relay so that damage is prevented even when some phases of an overload or three-phase alternating current are cut off.
  • Thermal overload relays include bimetals (hereinafter “primary bimetals”).
  • the main bimetal is formed of two or more materials with different coefficients of thermal expansion, and can be bent according to the temperature change inside or outside the thermal overload relay.
  • the thermal overload relay is manufactured to be sensitive to temperature change, that is, to be curved even in a minute temperature change, in order to perform the above-described function.
  • the thermal overload relay is additionally provided with a bimetal (hereinafter, “secondary bimetal”) for temperature compensation.
  • the secondary bimetal bends as the primary bimetal increases in temperature in the environment in which the thermal overload relay is installed.
  • the distance at which the main bimetal must be curved in order to perform a trip operation is increased, so that the curvature of the main bimetal due to an increase in ambient temperature can be compensated.
  • a trip mechanism 1000 of a thermal overcurrent circuit breaker according to the prior art and a temperature compensation mechanism 1300 provided therein are disclosed.
  • the state shown in FIG. 1 is a state in which the trip mechanism 1000 is in a normal state, that is, a state in which an external power source and a load (ie, an electric motor) are electrically connected to each other.
  • the temperature compensation mechanism 1300 rotatably coupled to the adjustment link 1200 is rotated in a direction (counterclockwise in the illustrated embodiment) toward the reversing mechanism 1100 .
  • the reversing mechanism 1100 is pressed by the pressing portion 1312 of the temperature compensation mechanism 1300 and is bent, and a contact provided at an end thereof is in contact with a contact located at an upper side to perform a trip operation. .
  • the temperature compensation mechanism 1300 includes a compensation link 1310 , a compensation bimetal 1320 , and a rivet 1330 .
  • the compensation link 1310 is rotatably coupled to the adjustment link 1200 by a coupling member that is coupled through the coupling hole 1311 .
  • the compensating link 1310 is coupled with the compensating bimetal 1320 via a rivet 1330 .
  • a shift presses the compensating bimetal 1320 . Accordingly, the compensating link 1310 connected to the compensating bimetal 1320 is rotated toward the reversing mechanism 1100 , such that the presser 1312 urges the reversing mechanism 1100 . Accordingly, a trip operation may be performed.
  • the compensating bimetal 1320 is located between the compensating link 1310 and the reversing mechanism 1100 , to the left of the compensating link 1310 in the illustrated embodiment. Accordingly, the compensating bimetal 1320 is positioned to overlap the compensating link 1310 with a portion in the longitudinal direction thereof.
  • the portion of the compensating bimetal 1320 is blocked by the compensating link 1310 and is difficult to bend. Therefore, it is difficult to sufficiently secure the curved length of the compensation bimetal 1320, and as a result, the operation reliability of the trip mechanism 1000 and the thermal overload relay may be deteriorated.
  • the compensation bimetal 1320 is coupled to the compensation link 1310 by a plurality of rivets 1330 . Accordingly, the manufacturing cost is increased, and the time required for manufacturing the product is also increased.
  • the portion to which the compensation bimetal 1320 and the plurality of rivets 1330 are fastened is difficult to be sufficiently curved despite the temperature change. Accordingly, the structure may act as a factor limiting the curved length of the compensation bimetal 1320 .
  • Korean Patent Document No. 10-1052715 discloses a thermal overload relay having a structure that can easily form a structure of a reversing mechanism. Specifically, the lower surface of one side is integrally fixedly coupled to the free end of the reversing mechanism, and discloses a thermal overload relay including a contact interlock frame interlocked with the free end.
  • this type of thermal overload relay has a limitation in that it does not provide a method for sufficiently bending the bimetal for temperature compensation.
  • Korean Utility Model Document No. 20-0304676 discloses a fixed structure of a thermal overload relay having a structure in which productivity and maintenance convenience can be improved. Specifically, it discloses a fixing structure of a thermal overload relay having a structure in which a terminal base and a trip unit separated from each other can be coupled to each other and fixed.
  • An object of the present invention is to provide a temperature compensation mechanism having a structure capable of solving the above-described problems and a thermal overload relay including the same.
  • an object of the present invention is to provide a temperature compensation mechanism having a structure capable of increasing the degree of compensation for the curvature of the main bimetal due to the heat of the installed surrounding environment, and a thermal overload relay including the same.
  • an object of the present invention is to provide a temperature compensation mechanism having a structure in which the curvature of the bimetal is not limited for compensating for the curvature of the main bimetal and a thermal overload relay including the same.
  • an object of the present invention is to provide a temperature compensation mechanism having a structure in which a bimetal for compensating for the curvature of the main bimetal and a member for supporting the same can be stably coupled, and a thermal overload relay including the same.
  • an object of the present invention is to provide a temperature compensation mechanism having a structure capable of improving operational reliability and a thermal overload relay including the same.
  • an object of the present invention is to provide a temperature compensation mechanism having a structure in which a bimetal for compensating for the curvature of the main bimetal and a member for supporting the same can be easily and simply coupled, and a thermal overload relay including the same.
  • a reward link and a compensating bimetal coupled to the compensating link and extending to partially surround the compensating link, wherein the compensating bimetal is coupled to the compensating link and surrounds a portion of the compensating link and extends in one direction a first extension; a second extension portion continuous with the first extension portion and spaced apart from the compensating link and extending in different directions along another portion of the compensating link; and a third extension that is continuous with the second extension and is spaced apart from the compensating link and extends in a direction opposite to the one direction along another portion of the compensating link.
  • the compensation link of the temperature compensation mechanism may include a body portion coupled to the first extension portion; and a head portion that is continuous with the body portion, extends in a continuous direction of the first extension portion, and is wrapped around the second extension portion.
  • the head portion of the temperature compensating mechanism is formed to be rounded so that a cross section thereof is convex in a direction opposite to the body portion, and the second extension portion has a center whose cross section is the same as the center of the cross section of the head portion, It is formed to be round to be convex in a direction opposite to the head portion, and may be formed in an arc shape having a predetermined central angle.
  • first extended portion of the temperature compensation mechanism one end of the extension direction is located at the same height as the center of the cross-section of the second extension, the other end is a predetermined space formed inside the body portion Inserted in the, one end of the third extension in the extension direction may be positioned at the same height as the center of the cross-section of the second extension, and the other end may be positioned lower than the body portion.
  • a predetermined space may be formed inside the body portion of the temperature compensation mechanism, and one end of the first extension portion facing the body portion may be inserted and coupled to the space.
  • a coupling protrusion protruding from any one surface of the surface surrounding the space is provided inside the space of the temperature compensation mechanism, and at the one end of the first extension part, the inner side of the first extension part
  • a coupling groove formed by being depressed in a direction toward the coupling protrusion may be provided with a coupling groove into which the coupling protrusion is inserted and coupled.
  • the temperature compensation mechanism may include a fastening member coupling the compensation link and the compensation bimetal, wherein the compensation link includes a hollow part formed through the body part, and the compensation bimetal includes the first It is formed through the extension portion and includes a through hole positioned to overlap the hollow portion, and the fastening member may be through-coupled to the hollow portion and the through hole, respectively.
  • the hollow portion, the through hole, and the fastening member of the temperature compensation mechanism may be provided with a single number, respectively.
  • the compensation link of the temperature compensation mechanism may include a body portion coupled to the first extension portion; a first arm portion continuous with the body portion and extending in a direction opposite to the compensation bimetal, wherein the arm portion includes: a first arm portion continuous with the body portion and extending in a direction opposite to the compensation bimetal; and a second arm that is continuous with the first arm and extends at a predetermined angle with the first arm.
  • the compensation link of the temperature compensating mechanism may include a pressing protrusion that is positioned at an end of the second arm and protrudes outwardly of the second arm.
  • the compensation link of the temperature compensating mechanism includes a body portion having a predetermined space accommodating the first extension portion formed therein, and the body portion surrounds the predetermined space and interposes the predetermined space. It may include an inclined surface formed to be inclined on any one or more of a plurality of surfaces disposed to face each other to guide one end of the first extension toward the body.
  • the first extension portion of the temperature compensation mechanism includes an inclined portion formed to be inclined at an edge corresponding to the one or more surfaces on which the inclined surface is formed, and when the compensation bimetal is accommodated in the space, the inclined surface and the The inclined portions may be in contact with each other.
  • the frame a main bimetal accommodated inside the frame; a moving part connected to the main bimetal and movably accommodated in the frame in the left and right directions; and a temperature compensation mechanism pressed by the moving part and rotatably accommodated in the frame, wherein the temperature compensation mechanism includes: a compensation link rotatably coupled to the frame; and a compensating bimetal coupled to the compensating link and extending to partially surround the compensating link, wherein the compensating bimetal is coupled to the compensating link and rotates with the compensating link, wherein the compensating link comprises a portion of the compensating link.
  • first extension portion Surrounding the first extension portion extending in the vertical direction; a second extension portion continuous with the first extension portion and spaced apart from the compensating link and extending in different directions along another portion of the compensating link; and a third extension that is continuous with the second extension and is spaced apart from the compensating link and extends vertically along another portion of the compensating link.
  • the compensation link of the temperature compensation mechanism of the thermal overload relay may include a body portion having a predetermined space into which the first extension portion is inserted; and a head portion continuous with the body portion, rotatably coupled to the frame, and formed to be rounded so that an upper end thereof is convex toward the upper side, wherein the first extension portion and the third extension portion are disposed between the head portion can be placed to face each other.
  • the second extension portion of the temperature compensation mechanism of the thermal overload relay is formed to be rounded so as to be convex in a radially outward direction of the head portion, is formed to surround a portion of the head portion, and the first extension portion , may be formed to surround a portion of the body portion and another portion of the head portion, and the third extension portion may be formed to surround another portion of the body portion and the remaining portion of the head portion.
  • the temperature compensation mechanism includes a compensation bimetal.
  • the compensating bimetal is not formed in a straight line, and includes a first extension portion extending flatly, a second extension portion extending roundly, and a third extension portion extending flatly and extending in a direction opposite to the first extension portion.
  • the compensating bimetal extends to surround the body portion to which the compensating bimetal is coupled. Accordingly, the shape of the compensating bimetal is diversified, and the overall length of the compensating bimetal is increased.
  • the first to third extensions are each curved as heat is applied.
  • the total amount of curvature of the compensating bimetal due to the heat of the surrounding environment generated regardless of the application of the overcurrent may be increased. Accordingly, the amount of compensation for the curvature of the main bimetal due to the heat of the surrounding environment may also be increased.
  • the compensation bimetal is formed to surround the body portion, and is formed to have a shape corresponding to the shape of the outer side of the body portion.
  • the compensating bimetal is positioned to be spaced apart from the body part by a predetermined distance.
  • the curvature of the compensating bimetal is not limited.
  • a predetermined space is formed inside the body portion to which the first extension of the compensating bimetal is inserted and coupled.
  • the space is formed in a shape corresponding to the shape of the first extension of the compensating bimetal.
  • a coupling protrusion is formed on the body portion to protrude.
  • the coupling protrusion is inserted and coupled to the coupling groove recessed in the first extension of the compensating bimetal.
  • the body portion and the compensating bimetal are stably coupled to each other and not arbitrarily fluctuate.
  • the limit capable of compensating for the curvature of the main bimetal due to ambient heat increases.
  • the coupling state of the body portion and the coupling protrusion constituting the temperature compensation device may be stably maintained through the above-described configuration.
  • the operational reliability of the temperature compensation device and the thermal overload relay including the same can be improved.
  • the compensation bimetal is inserted and coupled to the space formed inside the body part.
  • the coupling protrusion provided in the body portion is inserted and coupled to the coupling groove provided in the compensating bimetal.
  • the body portion and the compensating bimetal are coupled by a fastening member.
  • the fastening member is through-coupled to the hollow portion formed in the body portion and the through hole formed in the compensating bimetal, respectively.
  • the fastening member, the hollow part, and the through hole are each engaged in a single number.
  • the compensating bimetal after the compensating bimetal is inserted into the space of the body part, it is coupled to the body part by a single fastening member. Accordingly, the combination of the compensation bimetal and the body portion can be formed simply, easily and stably. Accordingly, the manufacturing process of the temperature compensation device and the thermal overload relay including the same may be simplified, and the manufacturing cost and manufacturing time may be reduced.
  • FIG. 1 is a front view showing a trip mechanism provided in a thermal overload relay according to the prior art.
  • FIG. 2 is a perspective view illustrating a temperature compensation mechanism provided in the trip mechanism of FIG. 1 .
  • FIG. 3 is a side view illustrating a temperature compensation mechanism provided in the trip mechanism of FIG. 1 .
  • FIG. 4 is a partially opened perspective view showing a thermal overload relay according to an embodiment of the present invention.
  • Figure 5 is a partially open front view showing a thermal overload relay according to an embodiment of the present invention.
  • FIG. 6 is a perspective view illustrating a temperature compensation mechanism provided in the thermal overload relay of FIGS. 4 and 5 .
  • Fig. 7 is a perspective view from another angle showing the temperature compensation mechanism of Fig. 6;
  • FIG. 8 and 9 are side views illustrating the temperature compensation mechanism of FIG. 6 .
  • Fig. 10 is a plan view showing the temperature compensation mechanism of Fig. 6;
  • Fig. 11 is a bottom view showing the temperature compensation mechanism of Fig. 6;
  • Fig. 12 is a front view showing the temperature compensation mechanism of Fig. 6;
  • Fig. 13 is a rear view showing the temperature compensation mechanism of Fig. 6;
  • FIG. 14 is a perspective view illustrating a compensation link provided in the temperature compensation mechanism of FIG. 6 .
  • FIG. 15 is a perspective view illustrating a compensation bimetal provided in the temperature compensation mechanism of FIG. 6 .
  • 16A and 16B are side views showing the amount of curvature of the temperature compensation mechanism according to the prior art.
  • 17A and 17B are side views illustrating a curvature amount of a temperature compensation mechanism according to an embodiment of the present invention.
  • energized used in the following description refers to a state in which two or more different members can receive current or electrical signals from each other.
  • the energized state may be formed in a wired manner by a conducting wire member or the like, or may be formed in a wireless manner by Wi-Fi or Bluetooth.
  • bimetal used in the following description refers to a member in which two or more materials having different coefficients of thermal expansion are combined.
  • the bimetal may be formed in a plate shape in which two or more metals having different coefficients of thermal expansion are combined.
  • the thermal overload relay 10 is a frame 100, a current adjustment unit 200, a energizing unit 300, a main bimetal 400, a moving unit ( 500), and a reversing mechanism 600.
  • the thermal overload relay 10 according to the embodiment of the present invention further includes a temperature compensation mechanism 700 .
  • the frame 100 forms the exterior of the thermal overload relay 10 .
  • a space is formed inside the frame 100, and each component for operating the thermal overload relay 10 may be mounted. That is, the frame 100 functions as a kind of housing.
  • the inside of the frame 100 includes a current adjusting unit 200 , an energizing unit 300 , a main bimetal 400 , a moving unit 500 , a reversing mechanism unit 600 , and a temperature compensation mechanism 700 . Accepted.
  • the inside of the frame 100 may be energized with an external power source or load.
  • an external power source or load may conduct electricity with each component accommodated in the frame 100 .
  • the frame 100 is preferably formed of an insulating and high rigidity material. This is to prevent damage to each component housed inside and to prevent unexpected energization.
  • the frame 100 may be formed of a synthetic resin or a ceramic material.
  • the frame 100 includes an upper frame 110 and a lower frame 120 .
  • the upper frame 110 forms an upper side of the frame 100 .
  • the upper frame 110 is formed with a space therein, it can accommodate a portion of the components for the thermal overload relay 10 to operate.
  • the upper frame 110 accommodates the current adjusting unit 200 , the moving unit 500 , the reversing mechanism 600 , and the temperature compensation mechanism 700 .
  • Some of the above components may be coupled to the upper frame 110 . Some of the components may be linearly, rotated or translated while being coupled to the upper frame 110 .
  • the adjustment dial 210 of the current adjustment unit 200 is rotatably coupled to the upper frame 110 .
  • the adjustment link 220 of the current adjustment unit 200 is coupled to the upper frame 110 to be movable in the vertical direction.
  • the shifter 520 of the moving unit 500 is coupled to the upper frame 110 to be movable in the left and right directions.
  • the temperature compensation mechanism 700 is coupled to the upper frame 110 rotatably in a clockwise or counterclockwise direction.
  • the lower frame 120 forms the lower side of the frame 100 .
  • the lower frame 120 is formed with a space therein, so that the thermal overload relay 10 can accommodate another part of the components for operating.
  • the lower frame 120 accommodates the conducting unit 300 , the main bimetal 400 and the moving unit 500 .
  • Some of the above components may be coupled to the lower frame 120 . Some of the components may be linearly, rotated or translated while being coupled to the lower frame 120 .
  • the shifter 520 of the moving unit 500 is movably coupled to the lower frame 120 in the left and right directions.
  • the lower frame 120 includes a plurality of partition walls 121 .
  • the partition wall portion 121 is positioned between the current conducting units 300 through which different phase currents are passed, and partitions a space formed inside the lower frame 120 . Accordingly, each current conducting unit 300 may be physically and electrically spaced apart from each other.
  • two partition wall portions 121 are provided, respectively, located between the three conductive portions 300 provided. This is due to the three-phase current passing through the thermal overload relay 10 according to the embodiment of the present invention.
  • the number of the partition wall portions 121 may be changed according to the number of current conducting units 300 , that is, the number of phases of current passed through the thermal overload relay 10 .
  • the upper frame 110 and the lower frame 120 are coupled. Also, the space formed inside the upper frame 110 and the space formed inside the lower frame 120 may communicate with each other.
  • the current adjustment unit 200 may be operated by a user or an operator, and the magnitude of the current for operating the thermal overload relay 10 may be adjusted.
  • the current adjusting unit 200 is rotatably and movably coupled to the frame 100 . A detailed description thereof will be given later.
  • the current adjustment unit 200 includes an adjustment dial 210 and an adjustment link 220 .
  • the adjustment dial 210 is rotated by the user or operator to adjust the magnitude of the current for the thermal overload relay 10 to operate.
  • the adjustment dial 210 is exposed on the outside of the frame 100 .
  • the adjustment dial 210 is exposed on the upper side of the upper frame 110 .
  • a user or operator may visually recognize the exposed adjustment dial 210 and operate the rotation.
  • the adjustment dial 210 is rotatably coupled to the frame 100 .
  • the adjustment dial 210 is rotatably coupled to the upper surface of the upper frame 110 .
  • the adjustment dial 210 is coupled through the frame 100 .
  • the upper end of the adjustment dial 210 is exposed to the outside of the upper frame 110 , and the lower end thereof is located in a space formed inside the upper frame 110 .
  • the lower end of the adjustment dial 210 is connected to the adjustment link 220 .
  • the adjustment link 220 is lifted up and down in the vertical direction as the adjustment dial 210 is rotated to adjust the magnitude of the current for the thermal overload relay 10 to operate.
  • the adjustment link 220 is accommodated in the inner space of the frame 100 .
  • the adjustment link 220 is located inside the upper frame 110 , adjacent the right wall of the upper frame 110 . That is, the adjustment link 220 is not exposed to the outside of the frame 100 .
  • the adjustment link 220 is coupled to the frame 100 to be elevating. In the illustrated embodiment, the adjustment link 220 is coupled to the inner space of the upper frame 110 to be liftable in the vertical direction.
  • the adjustment link 220 extends in one direction, in the illustrated embodiment, in the vertical direction. Among the ends in the extending direction of the adjustment link 220 , an upper end in the direction toward the adjustment dial 210 , in the illustrated embodiment, is connected to the adjustment dial 210 . Another direction among the ends in the extending direction of the adjustment link 220 , in the illustrated embodiment, the lower end may extend to the boundary surface between the upper frame 110 and the lower frame 120 .
  • the adjustment dial 210 and the adjustment link 220 are connected to each other. As the adjustment dial 210 is rotated clockwise or counterclockwise, the adjustment link 220 may be raised or lowered in any one of the vertical directions.
  • a separate link member (not shown) may be provided in order to convert the rotational movement of the adjustment dial 210 into a lifting movement of the adjustment link 220 .
  • the energizing unit 300 is a part in which the thermal overload relay 10 is energized with an external power source or load. Current applied from an external power source may be transmitted to an external load, for example, an electric motor through the energizing unit 300 .
  • the conducting unit 300 may be electrically connected to an external power source or load in a wired manner by means of a conducting wire member or the like. Alternatively, the conducting unit 300 may be electrically connected to an external power source or load in a wireless manner.
  • the conducting unit 300 is partially accommodated in a space formed inside the upper frame 110 .
  • the remaining portion of the conducting unit 300 may be accommodated in a space formed inside the lower frame 120 .
  • the energizing unit 300 includes a main fixed contact 310 , a main movable contact bar 320 and a energizing bar 330 .
  • the main fixed contact 310 is in contact with or spaced apart from the main movable contact 321 .
  • the thermal overload relay 10 When the main fixed contact 310 is in contact with the main movable contact 321 , the thermal overload relay 10 may be electrically connected to an external power source or load. In addition, when the main fixed contact 310 is spaced apart from the main movable contact 321 , the thermal overload relay 10 may be cut off from energization with an external power source or load.
  • the main fixed contact 310 is accommodated in the inner space of the frame 100 .
  • the main fixed contact 310 is not exposed to the outside of the thermal overload relay 10 .
  • the main fixed contact 310 is located in the inner space of the upper frame 110 .
  • the main fixed contact 310 is positioned adjacent to the boundary between the upper frame 110 and the lower frame 120 .
  • the primary fixed contact 310 is positioned adjacent to the primary movable contact 321 .
  • the main fixed contact 310 is fixed to the frame 100 and does not move. Accordingly, contact and separation of the main fixed contact 310 and the main movable contact 321 is achieved by moving the main movable contact 321 .
  • the primary fixed contact 310 is positioned adjacent to the primary movable contact 321 .
  • One side of the main fixed contact 310, the upper side in the illustrated embodiment, the main movable contact point 320 and the main movable contact 321 are located.
  • the main movable contact point 320 is accommodated and coupled to the frame 100 rotatably in a direction toward the main fixed contact 310 or in a direction opposite to the main fixed contact 310 .
  • the main movable contact point 320 may be rotated counterclockwise or clockwise.
  • the main movable contact point 320 is formed to extend in one direction, in the left-right direction in the illustrated embodiment.
  • the height of the left end of the main movable contact bar 320 may be lower than that of the right end.
  • One end of the main movable contact point 320 is rotatably coupled to the frame 100 , specifically, the upper frame 110 . That is, the right end of the main movable contact point 320 may function as an axis on which the main movable contact point 320 is rotated.
  • the other end of the main movable contact point 320, the left end in the illustrated embodiment, the main movable contact 321 is located adjacent to.
  • the main movable contact 321 is in contact with or spaced apart from the main fixed contact 310 .
  • the thermal overload relay 10 When the main movable contact 321 is in contact with the main fixed contact 310, the thermal overload relay 10 may be electrically connected to an external power source or load. In addition, when the main movable contact 321 is spaced apart from the main fixed contact 310, the thermal overload relay 10 may be cut off from energization with an external power source or load.
  • the main movable contact 321 is accommodated in the inner space of the upper frame 110 .
  • the main movable contact 321 is energized with the main movable contact stand 320 .
  • the main movable contact 321 may be coupled to the main movable contact 320 and move together.
  • the main movable contact 321 may be located adjacent to the end of the main movable contact point 320 facing the main fixed contact 310, the left end in the illustrated embodiment.
  • the energizing bar 330 is connected to an external power source or a load to be energized.
  • the energizing bar 330 is electrically connected to the main fixed contact 310 and the main movable contact 321 . Accordingly, the thermal overload relay 10 may be electrically connected to an external power source or load.
  • the energized bar 330 may be partially exposed to the outside of the frame 100 . Also, the remaining portion of the energized bar 330 may be accommodated in the frame 100 .
  • the upper portion of the conduction bar 330 extends in the front-rear direction, and is exposed to the outside of the frame 100 .
  • the remaining portion of the energized bar 330 is continuous with the upper portion, and is formed to extend from the upper frame 110 toward the lower frame 120 .
  • the conducting bar 330 may be formed of a material having high electrical conductivity.
  • the conducting bar 330 may be formed of a copper (Cu) material.
  • a plurality of energizing bars 330 may be provided.
  • the plurality of energizing bars 330 may be disposed to be spaced apart from each other.
  • the energized bar 330 is provided with three including the first energized bar 331 , the second energized bar 332 , and the third energized bar 333 , and is formed by the partition wall 121 . It is located in each of the three partitioned spaces.
  • the plurality of energizing bars 330 may be respectively connected to a plurality of coils (not shown) wound around the plurality of main bimetals 400 to be energized, respectively.
  • a plurality of coils wound around the plurality of main bimetals 400 to be energized, respectively.
  • the plurality of coils may be overheated, and the main bimetal 400 may be curved.
  • the main bimetal 400 is curved by heat generated by applying an overcurrent to the thermal overload relay 10 . Due to the curvature of the main bimetal 400 , the main movable contact point 320 may be moved in a direction away from the main fixed contact point 310 .
  • the coil is wound around the main bimetal 400 .
  • the coil is electrically connected to the energizing bar 330 energized with the outside, so that an applied current may flow.
  • the main bimetal 400 may be curved by heat generated by the coil.
  • the main bimetal 400 is in contact with the moving part 500 .
  • the main bimetal 400 may be curved and press the moving part 500 .
  • the moving part 500 may be moved in a direction in which the main bimetal 400 is curved and rotated by pressing the temperature compensation mechanism 700 .
  • the main bimetal 400 may be formed by combining two or more metal plates having different coefficients of thermal expansion.
  • the main bimetal 400 is accommodated in a space formed inside the lower frame 120 .
  • the main bimetal 400 may be accommodated in the lower frame 120 to be curved in a specific direction by the heat generated by the coil.
  • the main bimetal 400 may be curved toward the right. Accordingly, it will be understood that the moving part 500 will also move to the right and press the temperature compensation mechanism 700 .
  • the main bimetal 400 extends in one direction, in the illustrated embodiment, in the vertical direction.
  • the upper end of the main bimetal 400 is in contact with the moving part 500 .
  • a lower side of the main bimetal 400 may extend along a lower space of the lower frame 120 .
  • the main bimetal 400 is positioned adjacent to the energized bar 330 .
  • a plurality of main bimetal 400 may be provided.
  • three main bimetals 400 are provided, including a first main bimetal 410 , a second main bimetal 420 , and a third main bimetal 430 .
  • the space formed inside the lower frame 120 may be divided into a plurality of spaces by the partition wall part 121 . Accordingly, the first to third main bimetals 410 , 420 , and 430 may be accommodated in a plurality of partitioned spaces, respectively.
  • the moving part 500 is connected to the main bimetal 400 and moves as the main bimetal 400 is curved. In addition, the moving part 500 is moved by a predetermined distance or more to press the compensation bimetal 720 of the temperature compensation mechanism 700 . Accordingly, the temperature compensation mechanism 700 is rotated, the inversion mechanism portion 600 can be operated.
  • the moving part 500 is in contact with or connected to the main bimetal 400 .
  • the moving part 500 may move in one direction.
  • the moving part 500 may be moved in another direction to return to the original direction.
  • an elastic member (not shown) for applying a restoring force in the other direction to the moving unit 500 may be provided.
  • the moving unit 500 is movably accommodated in the inner space of the lower frame 120 .
  • the moving unit 500 is accommodated in the upper side of the main bimetal 400, movably in the left and right direction.
  • the moving unit 500 On the upper side of the moving unit 500 , the main fixed contact 310 , the main movable contact stand 320 , the reversing mechanism 600 and the temperature compensation mechanism 700 are positioned. In particular, when the main bimetal 400 is curved and the moving part 500 moves more than a predetermined distance, the moving part 500 may press the temperature compensation mechanism 700 .
  • the moving unit 500 includes a moving bar 510 and a shifter 520 .
  • the moving bar 510 is in contact with or connected to the main bimetal 400 and moves together with the main bimetal 400 .
  • the moving bar 510 may be moved in the left and right directions.
  • the moving bar 510 is formed to extend in its moving direction, in the illustrated embodiment, in the left and right directions. In this case, it is preferable that each end of the moving bar 510 in the extending direction extends so as not to contact the left inner wall and the right inner wall of the lower frame 120 in an arbitrary state.
  • a plurality of main bimetal 400 may be provided.
  • the moving bar 510 may be in contact with or connected to the plurality of main bimetals 400 , respectively.
  • the moving bar 510 is moved to press the temperature compensation mechanism 700 and a trip operation may be performed.
  • a shifter 520 is positioned on one side of the moving bar 510 facing the temperature compensation mechanism 700 , and on the upper side in the illustrated embodiment.
  • the shifter 520 is moved together with the moving bar 510 to press the compensation bimetal 720 of the temperature compensation mechanism 700 . Accordingly, the compensation bimetal 720 and the compensation link 710 connected thereto are rotated to press the inversion movable contact point 620 .
  • the shifter 520 is coupled to the moving bar 510 .
  • the shifter 520 may be moved together with the moving bar 510 .
  • the shifter 520 may come into contact with the compensation bimetal 720 of the temperature compensation mechanism 700 , but may not pressurize it.
  • the shifter 520 may move toward the compensating bimetal 720 to press the compensating bimetal 720 .
  • the number of shifters 520 is provided.
  • the shifter 520 includes a first part connected to the moving bar 510 and extending in the vertical direction, a second part continuous with the first part, and a second part and a second part extending in the left and right direction toward the compensation bimetal 720 , and a third portion that is continuous and extends in an up-down direction.
  • the shape of the shifter 520 may be any shape capable of being moved together with the moving bar 510 to press the compensation bimetal 720 .
  • the inversion mechanism 600 is energized with an external indicator (not shown) when an overcurrent is applied. Accordingly, the user or operator can easily recognize that the trip operation has been performed due to the overcurrent being applied.
  • the inversion mechanism 600 is movably accommodated in the inner space of the frame 100 .
  • the reversing mechanism 600 is movably accommodated in the inner space of the upper frame (110).
  • the reversal mechanism 600 is positioned adjacent the temperature compensation mechanism 700 .
  • the inversion mechanism 600 may be pressed by the temperature compensation mechanism 700 . That is, the power for operating the reversing mechanism 600 is provided by the temperature compensation mechanism 700 .
  • the reversing mechanism 600 includes a reversing fixed contact 610 and a reversing movable contact stand 620 .
  • the inverted fixed contact 610 is in contact with or spaced apart from the inverted movable contact 621 .
  • the thermal overload relay 10 When the inverted fixed contact 610 is in contact with the inverted movable contact 621 , the thermal overload relay 10 may be electrically connected to an external indicator (not shown). In addition, when the inverted fixed contact 610 is spaced apart from the inverted movable contact 621 , the thermal overload relay 10 may be cut off from energization with an external indicator (not shown).
  • the contact of the inverted fixed contact 610 and the inverted movable contact 621 and the separation state of the main fixed contact 310 and the main movable contact 321 are formed at the same time.
  • the separation of the inverted fixed contact 610 and the inverted movable contact 621 and the contact state of the main fixed contact 310 and the main movable contact 321 are also formed at the same time.
  • the thermal overload relay 10 is energably connected only to any one of an external indicator and an external power source or a load.
  • the inverted fixed contact 610 is accommodated in the inner space of the frame 100 .
  • the inverted fixed contact 610 is not exposed to the outside of the thermal overload relay 10 .
  • the inverted fixed contact 610 is located in the inner space of the upper frame 110 .
  • the inverted fixed contact 610 is located adjacent to the upper surface of the upper frame 110 .
  • An inversion movable contact stand 620 is positioned at the lower side of the inverted fixed contact 610 .
  • the inverted fixed contact 610 is positioned adjacent to the inverted movable contact 621 .
  • the inverted fixed contact 610 is fixed to the frame 100 and does not move. Accordingly, contact and separation of the inverted fixed contact 610 and the inverted movable contact 621 is achieved by moving the inverted movable contact 621 .
  • the inverted fixed contact 610 is positioned adjacent to the inverted movable contact 621 .
  • the upper side of the upper frame 110 is located on the upper side in the illustrated embodiment.
  • the indicator (not shown) may be exposed outside the upper surface.
  • the other side of the inverted fixed contact 610, the lower side in the illustrated embodiment, the inverted movable contact stand 620 and the inverted movable contact 621 are located.
  • Reversing movable contact point 620 is accommodated and coupled to frame 100 so as to be rotatable or curved in the direction opposite to or opposite to the inverted fixed contact 610 in the direction toward the inverted fixed contact 610 .
  • the reversing movable contact point 620 may be rotated counterclockwise or clockwise.
  • Reversing movable contact point 620 is formed to extend in one direction, left and right direction in the illustrated embodiment.
  • One end of the reversing movable contact point 620, the right end in the illustrated embodiment is coupled to the frame 100, specifically the upper frame 110.
  • the other end of the reversing movable contact point 620, the left end in the illustrated embodiment, the reversing movable contact 621 is located adjacent to.
  • Reversing movable contact point 620 may be formed of an elastic material.
  • the reversing movable contact point 620 may be provided in a plate shape extending in one direction, in the left and right directions in the illustrated embodiment.
  • the shape of the inversion movable contact point 620 may be deformed by being pressed by the temperature compensation mechanism 700 .
  • the inversion movable contact point 620 may be restored to its original shape again.
  • the pressing protrusion 714 of the compensation link 710 may press any point between one end and the other end of the reversing movable contact point 620 .
  • the inversion movable contact point 620 is the arbitrary point is curved downward, and the left end is curved upward so that the inversion movable contact 621 can be in contact with the inversion fixed contact 610 .
  • the inverted movable contact point 620 is the arbitrary point is curved upward, and the left end is curved downward so that the inverted movable contact 621 is spaced apart from the inverted fixed contact 610. there is.
  • the reversing movable contact point 620 includes a reversing movable contact 621 and an elastic member 622 .
  • the reversing movable contact 621 is in contact with or spaced apart from the reversing fixed contact 610 .
  • the description of the process in which the inverted movable contact 621 is in contact with and spaced from the inverted fixed contact 610 is the same as described above.
  • the thermal overload relay 10 When the inverted movable contact 621 is in contact with the inverted fixed contact 610 , the thermal overload relay 10 may be electrically connected to an external indicator (not shown). In addition, when the inverted movable contact 621 is spaced apart from the inverted fixed contact 610, the thermal overload relay 10 may be cut off from energization with an external indicator (not shown).
  • the inverted movable contact 621 is accommodated in the inner space of the upper frame 110 .
  • the inverted movable contact 621 is energized with the inverted movable contact 620 .
  • the reversing movable contact 621 is coupled to the reversing movable contact 620 and may be moved together.
  • the reversing movable contact 621 may be located adjacent to the end of the reversing movable contact point 620 facing the reversing fixed contact 610, the left end in the illustrated embodiment.
  • the elastic member 622 is pressed by the temperature compensation mechanism 700 to provide a restoring force for the shape-deformed inversion movable contact point 620 to be restored to the shape before being pressed.
  • the elastic member 622 when the temperature compensation mechanism 700 presses the reversing movable contact point 620 with a force of less than a predetermined size, the reversing movable contact point 620 is a restoring force for maintaining the original shape. to provide.
  • the elastic member 622 is connected to the inversion movable contact point 620 .
  • the elastic member 622 may be integrally formed with the inversion movable contact point 620 . That is, in the above embodiment, the elastic member 622 may be formed as a part of the inversion movable contact point 620 .
  • An elastic member 622 is positioned adjacent to the reversing movable contact 621 .
  • the elastic member 622 is positioned between the reversing movable contact 621 and the arbitrary point along the extension direction of the reversing movable contact bar 620 .
  • the elastic member 622 may be provided in any shape capable of storing restoring force by shape deformation and transmitting the stored restoring force to another member.
  • the elastic member 622 is provided in the form of a coil spring (coil spring) extending along the extending direction of the inversion movable contact bar (620).
  • the thermal overload relay 10 includes a temperature compensation mechanism 700 .
  • the temperature compensation mechanism 700 is pressed and rotated by the moving part 500 to operate the reversing mechanism part 600 .
  • the movement of the moving part 500 is achieved by the main bimetal 400 that is curved by heat generated by applying an overcurrent.
  • the temperature compensation mechanism 700 is accommodated in the frame 100 and is rotatably coupled to the frame 100 .
  • the temperature compensation mechanism 700 is rotatably accommodated in the inner space of the upper frame 110 .
  • the temperature compensation mechanism 700 may be pressed by the moving part 500 .
  • the temperature compensation mechanism 700 may be rotated by being pressed by the moving part 500 .
  • the temperature compensation mechanism 700 may press the inversion mechanism part 600 . Specifically, when the temperature compensation mechanism 700 is rotated by a predetermined angle by being pressed by the moving unit 500 , the temperature compensation mechanism 700 may press the inversion movable contact point 620 . Accordingly, the shape of the reversing movable contact point 620 is deformed and the reversing fixed contact 610 and the reversing movable contact 621 may be in contact.
  • the temperature compensation mechanism 700 also includes a compensation bimetal 720 .
  • the compensation bimetal 720 compensates for the curvature of the main bimetal 400 caused by heat (hereinafter, referred to as “ambient heat”) generated in an environment in which the thermal overload relay 10 is installed, independent of the heat generated by the overcurrent. do.
  • the curved length of the compensation bimetal 720 due to ambient heat can be sufficiently secured. Therefore, the main bimetal 400 by the surrounding heat is sufficiently compensated, and the operational reliability of the thermal overload relay 10 can be improved.
  • the temperature compensation mechanism 700 includes a compensation link 710 , a compensation bimetal 720 , a fastening member 730 and a shaft member 740 .
  • the compensating link 710 forms the body of the temperature compensating mechanism 700 .
  • the compensation link 710 is a portion to which the temperature compensation mechanism 700 is rotatably coupled to the frame 100 .
  • the compensation link 710 is rotatably coupled to the frame 100 , specifically, the upper frame 110 .
  • Compensation link 710 may be rotated in a direction toward or opposite to the reversing movable contact point 620, counterclockwise or clockwise in the illustrated embodiment.
  • the coupling may be achieved by the shaft member 740 .
  • a compensation bimetal 720 is coupled to the compensation link 710 .
  • the compensating link 710 may be rotated clockwise or counterclockwise together with the compensating bimetal 720 .
  • the coupling may be achieved by the fastening member 730 .
  • the compensation link 710 may be formed of an insulating material having sufficient rigidity. While pressing the reversing movable contact point 620 with sufficient force, this is to prevent unnecessary current from passing through.
  • the compensation link 710 includes a body portion 711, an arm portion 712, a head portion 713, a pressing protrusion 714, a coupling protrusion 715, a hollow portion 716, a rotation hole ( 717 ) and an inclined surface 718 .
  • the body portion 711 forms the body of the compensating link 710 .
  • a compensation bimetal 720 is coupled to the body portion 711 .
  • a predetermined space is formed in the body portion 711 .
  • the space communicates with the hollow part 716 , and the first extension part 721 of the compensation bimetal 720 is inserted and coupled.
  • a coupling protrusion 715 may be positioned in the space.
  • the space may be formed in a shape corresponding to the shape of the lower end of the first extension 721 . Accordingly, the first extension 721 inserted into the space is not arbitrarily oscillated.
  • the body part 711 is continuous with the arm part 712 and the head part 713 .
  • the rear left side of the body portion 711 is continuous with the arm portion 712 .
  • the upper right side of the body part 711 is continuous with the head part 713 .
  • the body portion 711 may be covered by the compensating bimetal 720 .
  • One side of the body portion 711 facing the arm portion 712 in the illustrated embodiment, the left side may be in contact with the first extension portion 721 of the compensation bimetal 720 .
  • the other side of the body part 711 opposite to the arm part 712 in the illustrated embodiment, the right side may be covered by the third extension part 723 of the compensating bimetal 720 .
  • the arm 712 rotates with the compensating link 710 as it rotates.
  • the arm part 712 is continuous with the body part 711 and extends in a direction opposite to the body part 711 .
  • the arm portion 712 is continuous with the left side of the rear of the body portion 711 and extends toward the left side.
  • the arm part 712 includes a first arm part 712a and a second arm part 712b.
  • the first arm portion 712a is a portion in which the arm portion 712 is continuous with the body portion 711 .
  • the first arm portion 712a is connected to the rear left side of the body portion 711 .
  • the first arm portion 712a extends in a direction toward and opposite to the inversion movable contact 621a, in the left-right direction in the illustrated embodiment. In other words, the first arm portion 712a extends in a direction toward and opposite to the body portion 711 .
  • the second arm portion 712b is a continuous portion with the first arm portion 712a and the pressing protrusion 714 .
  • the second arm portion 712b is continuous with the left end of the first arm portion 712a.
  • the second arm part 712b may be continuous with the first arm part 712a at a predetermined angle.
  • the second arm portion 712b may extend perpendicularly to the first arm portion 712a.
  • the second arm portion 712b extends to the front side and the rear side.
  • One end in the direction in which the second arm portion 712b extends, the rear side in the illustrated embodiment, is continuous with the first arm portion 712a.
  • the other end in the direction in which the second arm portion 712b extends, in the illustrated embodiment, the front end is continuous with the pressing protrusion 714 .
  • the head portion 713 is a portion to which the compensation link 710 is rotatably coupled to the frame 100 .
  • the head part 713 is continuous with the body part 711 .
  • the head portion 713 is continuous with the upper side of the body portion 711 .
  • the head part 713 is located on one side of the body part 711 opposite to the direction in which the arm part 712 extends, and on the right side in the illustrated embodiment. In other words, the head portion 713 is positioned to face the arm portion 712 with the body portion 711 interposed therebetween.
  • the head portion 713 is formed to extend upward in the direction opposite to the body portion 711, in the illustrated embodiment.
  • the head portion 713 is formed to extend upward in the direction opposite to the body portion 711 , in the illustrated embodiment.
  • One side of the head portion 713 facing the body portion 711, the lower side in the illustrated embodiment is continuous with the body portion (711).
  • the other side of the head portion 713 opposite to the body portion 711, in the illustrated embodiment, may be formed to be rounded so that the upper end thereof is convex upward.
  • the upper end of the head portion 713 may be formed to have an arc-shaped cross-section having a predetermined curvature and diameter.
  • the curvature of the upper end of the head part 713 may be the same as the curvature of the second part of the compensation bimetal 720 .
  • the head portion 713 is a first portion continuous with the body portion 711, continuous with the first portion, and continuous with a second portion and a second portion formed to be rounded to be convex toward the upper side, and , may include a third portion continuous downward.
  • the head portion 713 may be covered by the compensating bimetal 720 .
  • the first portion of the head portion 713 may be covered by the first extension portion 721 of the compensation bimetal 720 .
  • the second portion of the head portion 713 may be covered by a second extension portion 722 of the compensating bimetal 720 .
  • the third portion of the head portion 713 may be covered by a third extension portion 723 of the compensating bimetal 720 .
  • the head part 713 may be spaced apart from the compensation bimetal 720 by a predetermined distance. In other words, the head part 713 may not come into contact with the compensation bimetal 720 .
  • the curved length of the compensation bimetal 720 due to the surrounding heat may be sufficiently secured.
  • the outer circumferential surface of the head portion 713 may extend parallel to the inner circumferential surface of the compensation bimetal 720 .
  • a rotation hole 717 is formed through the inside of the head portion 713 .
  • a shaft member 740 may be coupled through the rotation hole 717 to function as a rotation shaft of the compensation link 710 .
  • the pressing protrusion 714 is a portion that the rotated compensation link 710 presses the inverted movable contact point 620 . As the pressing protrusion 714 presses the reversing movable contact point 620 , the reversing mechanism 600 may be operated.
  • the pressing protrusion 714 is connected to the arm 712 . Specifically, the pressing protrusion 714 is connected to the end of the second arm 712b, the front end in the illustrated embodiment.
  • the pressing protrusion 714 is formed to extend in a direction opposite to the second arm portion 712b. In other words, the pressing protrusion 714 is formed to extend downward in the direction toward the inversion movable contact point 620, in the illustrated embodiment.
  • the protrusion length of the pressing protrusion 714 may be determined in consideration of the rotation angle of the compensating link 710 and the curved length of the compensating bimetal 720 .
  • the coupling protrusion 715 maintains the position of the compensating bimetal 720 coupled to the compensating link 710 .
  • the compensation link 710 and the compensation bimetal 720 may be coupled such that the coupling protrusion 715 is inserted into the coupling groove 724 . Accordingly, the coupling direction and position of the compensation link 710 and the compensation bimetal 720 may be limited.
  • the coupling state between the compensation link 710 and the compensation bimetal 720 may be stably formed and maintained by the coupling protrusion 715 .
  • the coupling protrusion 715 is located in a space formed inside the body portion 711 . That is, the coupling protrusion 715 is positioned in a space into which the first extension 721 of the compensating bimetal 720 is inserted.
  • the coupling protrusion 715 may be formed to protrude from any one or more of the inner surfaces of the body portion 711 surrounding the space.
  • the coupling protrusion 715 is formed to protrude from the left side of the body portion 711 surrounding the space toward the right side facing the left side.
  • the coupling protrusion 715 may be formed to protrude from the right side to the left side in the illustrated embodiment, any one inner surface in which a hollow portion 716 to be described later is formed.
  • the coupling protrusion 715 has a circular cross-section and has a cylindrical shape extending in the left and right directions. That is, the upper surface of the coupling protrusion 715 is a side surface of a cylinder, that is, a curved surface. This is due to the fact that the upper portion of the coupling groove 724 recessed in the compensation bimetal 720 is formed to be round.
  • the shape of the coupling protrusion 715 may be changed according to the shape of the coupling groove 724 .
  • a hollow portion 716 is positioned adjacent to the engaging projection 715 .
  • the hollow part 716 is hollow into which the fastening member 730 coupling the compensation link 710 and the compensation bimetal 720 is inserted.
  • the hollow portion 716 is formed through the other inner surface facing the inner surface of the body portion 711 surrounding the space of the body portion 711 .
  • the hollow portion 716 is formed through the right side of the inner surface.
  • the hollow part 716 has a circular cross section, and has a cylindrical shape extending in the left-right direction. Further, the hollow portion 716 is located relatively above the engaging projection (715).
  • the position and shape of the hollow part 716 may be changed according to the position and shape of the through hole 725 of the compensation bimetal 720 .
  • the rotation hole 717 is a space into which the shaft member 740 serving as a rotation shaft for rotation of the compensation link 710 is inserted therethrough.
  • the rotation hole 717 is formed through the shaft member 740 in the extending direction, in the illustrated embodiment, in the front-rear direction.
  • the rotation hole 717 is located inside the head part 713 .
  • the rotation hole 717 has a circular cross-section and has a cylindrical shape extending in the front-rear direction.
  • the shape of the rotation hole 717 may be changed according to the shape of the shaft member 740 .
  • the cross section of the rotation hole 717 may be formed to have the same center as the center of the cross section of the second part of the head part 713 or the center of the second extension part 722 of the compensation bimetal 720 .
  • the inclined surface 718 guides the compensation bimetal 720 to be inserted into the space of the body portion 711 .
  • the compensation bimetal 720 may be moved along the inclined surface 718 and stably inserted into the space of the body portion 711 .
  • the inclined surface 718 extends upward or downward at a predetermined angle with respect to the surface surrounding the space of the body portion 711 .
  • the inclined surface 718 extends at an obtuse angle with the surface surrounding the space of the body portion 711 .
  • the inclined surface 718 partially surrounds the space of the body portion 711 .
  • a plurality of inclined surfaces 718 may be formed.
  • two inclined surfaces 718 are formed and disposed to face each other with the space therebetween.
  • Each inclined surface 718 encloses a portion of the left and right sides of the space, respectively.
  • Compensating bimetal 720 compensates for curvature of primary bimetal 400 due to ambient heat.
  • the main bimetal 400 may be curved by a predetermined length when an overcurrent for which a trip operation is to be performed is applied even though the main bimetal 400 is curved in the surrounding column.
  • the compensation bimetal 720 is curved in a direction opposite to the shifter 520 that presses the compensation bimetal 720 by the surrounding heat by a predetermined distance to the right in the illustrated embodiment.
  • the distance at which the primary bimetal 400 is curved by the surrounding heat is compensated by the distance at which the compensating bimetal 720 is curved.
  • the compensation bimetal 720 may be formed of two or more materials having different coefficients of thermal expansion. In addition, when heat is generated, the compensation bimetal 720 may be disposed to be curved in a direction opposite to the shifter 520 , in the illustrated embodiment, to the right.
  • Compensating bimetal 720 is coupled with compensating link 710 .
  • the compensation bimetal 720 is pressed by the shifter 520 , the compensation bimetal 720 and the compensation link 710 may be rotated together.
  • the compensation bimetal 720 is formed to surround the body portion 711 and the head portion 713 of the compensation link 710 from the outside. In other words, the compensation bimetal 720 is formed to surround the body portion 711 and the head portion 713 .
  • the compensating bimetal 720 has a shape in which the letter "U" is inverted in the vertical direction, and the length of the part (the right part in the illustrated embodiment) that is farther from the arm part 712 is longer than the other parts. formed longer.
  • the shape of the compensation bimetal 720 may be changed according to the shape of the body part 711 and the head part 713 of the compensation link 710 .
  • the compensation bimetal 720 includes a first extension 721 , a second extension 722 , a third extension 723 , a coupling groove 724 , a through hole 725 , and an inclined portion. (726).
  • the first extension 721 forms a portion of the compensating bimetal 720 .
  • the first extension portion 721 is formed to extend in a direction in which the body portion 711 and the head portion 713 face each other, in the illustrated embodiment, in the vertical direction.
  • the first extension 721 may extend until its upper end reaches the same height as the center of the cross-section of the rotation hole 717 .
  • the first extension 721 is coupled to the body 711 . Specifically, the lower end of the first extension 721 in the direction toward the body 711 is inserted and coupled to the space formed in the body 711 in the illustrated embodiment. In one embodiment, the first extension 721 may be fitted into the space.
  • the first extension 721 surrounds a portion of the body 711 from the outside.
  • the first extension portion 721 is positioned between the body portion 711 and the arm portion 712 , and is formed to surround the left portion of the body portion 711 .
  • the first extension 721 surrounds a portion of the head 713 from the outside.
  • the first extension portion 721 partially surrounds the left portion of the head portion 713 .
  • the first extension part 721 may be disposed to be spaced apart from the left part of the head part 713 by a predetermined distance.
  • the first extension 721 is continuous with the second extension 722 .
  • an upper end of the first extension 721 is continuous with a left end of the second extension 722 .
  • a coupling groove 724 is recessed in the lower end of the first extension 721 .
  • a through hole 725 that is formed to pass through in the left and right directions is positioned inside the first extension 721 .
  • the second extension 722 forms another portion of the compensating bimetal 720 .
  • the second extension portion 722 is formed to be rounded from the radially outer side of the head portion 713 to upwardly convex.
  • the cross section of the second extension 722 has a central angle of a predetermined size, has a predetermined outer diameter, and the center of the cross section of the head portion 713 or the center of the cross section of the rotation hole 717 and It may be formed in an arc shape having the same center.
  • the central angle of the cross-section of the second extension 722 may be 180°. That is, the second extension 722 may have a semicircular arc shape in its cross-section.
  • the second extension 722 is continuous with the first extension 721 .
  • the left end of the second extension 722 is continuous with the upper end of the first extension 721 .
  • the second extension 722 is continuous with the third extension 723 .
  • the right end of the second extension 722 is continuous with the upper end of the third extension 723 .
  • the second extension 722 surrounds a portion of the head 713 from the outside.
  • the second extension portion 722 is positioned to surround the second portion of the head portion 713 from the upper side.
  • the second extension portion 722 may be disposed to be spaced apart from the second portion of the head portion 713 by a predetermined distance.
  • the third extension 723 forms the remainder of the compensating bimetal 720 .
  • the third extension portion 723 is formed to extend in a direction in which the body portion 711 and the head portion 713 face each other or in a direction in which the first extension portion 721 extends, in the illustrated embodiment, in the vertical direction.
  • the upper end of the third extension 723 may be positioned at the same height as the center of the cross-section of the rotation hole 717 .
  • the third extension 723 may extend such that a lower end thereof is positioned equal to or lower than the height of the shifter 520 .
  • the third extension 723 surrounds the other portion of the body 711 from the outside.
  • the third extension 723 is formed to surround the right portion of the body portion 711 .
  • the third extension 723 surrounds the rest of the head 713 from the outside.
  • the third extension portion 723 is formed to surround the right portion of the head portion 713 .
  • the third extension portion 723 may be disposed to be spaced apart from each other by a predetermined distance from the right portion of the body portion 711 and the head portion 713 .
  • the third extension 723 is continuous with the second extension 722 .
  • the upper end of the third extension 723 is continuous with the right end of the second extension 722 .
  • the third extension 723 is in contact with the shifter 520 .
  • the lower end of the third extension 723 and a portion adjacent thereto are in contact with the shifter 520 .
  • a groove 723a may be recessed in the lower end of the third extension 723 .
  • the movement of the moving bar 510 and the shifter 520 may not be hindered by the groove 723a.
  • the third extension 723 is disposed to face the first extension 721 with the head 713 interposed therebetween.
  • a mating groove 724 maintains the position of the compensating bimetal 720 coupled to the compensating link 710 .
  • the compensation link 710 and the compensation bimetal 720 may be coupled such that the coupling protrusion 715 is inserted into the coupling groove 724 . Accordingly, the coupling direction and position of the compensation link 710 and the compensation bimetal 720 may be limited.
  • the coupling state between the compensation link 710 and the compensation bimetal 720 by the coupling groove 724 may be stably formed and maintained.
  • the coupling groove 724 is formed to be recessed upward in the illustrated embodiment in a direction opposite to the space of the body 711 at the lower end of the first extension 721 .
  • the coupling groove 724 is formed to be rounded so that an upper end thereof is convex upward, and extends to a lower end of the first extension 721 .
  • the coupling groove 724 has a shape in which the letter "U” is turned upside down. The shape is due to the outer circumferential surface of the coupling protrusion 715 inserted and coupled to the coupling groove 724 is formed as a side surface of a cylinder, that is, a curved surface.
  • the position and shape of the coupling groove 724 may be changed according to the position and shape of the coupling protrusion 715 .
  • a through hole 725 is positioned adjacent to the engaging groove 724 .
  • the through hole 725 is hollow through which the fastening member 730 coupling the compensating link 710 and the compensating bimetal 720 is inserted.
  • the through hole 725 is formed through the inside of the first extension 721 .
  • the through hole 725 has a circular cross section and has a cylindrical shape extending in the left and right directions. Furthermore, the through hole 725 is located relatively above the coupling groove 724 .
  • the through hole 725 may be disposed to overlap the hollow portion 716 of the body portion 711 .
  • the through hole 725 may be disposed to have the same central axis as the hollow portion 716 .
  • the position and shape of the through hole 725 may be changed according to the position and shape of the hollow part 716 .
  • the inclined portion 726 limits the insertion distance of the compensation bimetal 720 inserted into the space of the body portion 711 .
  • the compensation bimetal 720 may be moved downward until the inclined part 726 comes into contact with the inclined surface 718 formed on the compensation link 710 to be inserted into the space of the body part 711 .
  • the engaging protrusion 715 may be in contact with the rounded upper end of the engaging groove 724 .
  • the inclined portion 726 may be formed at any one of two long corners of the corners of the first extension 721 , and a front side and a rear side corner in the illustrated embodiment. In the illustrated embodiment, the inclined portion 726 is formed at the front side edge.
  • the bevel 726 may be formed at both the front side edge and the back side edge.
  • the inclined portion 726 is formed to extend obliquely from one of the corners of the first extension 721 in a direction toward the inside of the first extension 721 . In the illustrated embodiment, the inclined portion 726 is formed to extend downward toward the rear.
  • the inclined portion 726 extends to form a predetermined angle with any one of the corners. In the illustrated embodiment, the inclined portion 726 extends to form an obtuse angle with any one of the corners.
  • the inclined portion 726 extends by a predetermined length.
  • One end of the inclined portion 726, an upper end in the illustrated embodiment, is continuous with any one of the corners of the first extension 721 .
  • the other end of the inclined portion 726, the lower end in the illustrated embodiment, is continuous with the other edge positioned to be biased on the inside of the first extension 721 compared to any one of the edges.
  • the width of the lower side of the first extension 721 is smaller than the width of the upper side.
  • the fastening member 730 couples the compensating link 710 and the compensating bimetal 720 .
  • the fastening member 730 may be through-coupled to the compensation link 710 and the compensation bimetal 720 , respectively.
  • the fastening member 730 is through-coupled to the hollow portion 716 formed in the compensation link 710 and the through hole 725 formed in the compensation bimetal 720 , respectively.
  • the fastening member 730 may be provided in any shape capable of coupling two or more members.
  • the fastening member 730 may be provided as a rivet.
  • the number of fastening members 730 is provided. This is because the compensating link 710 and the compensating bimetal 720 are also coupled by the coupling protrusion 715 and the coupling groove 724 .
  • the lower side of the first extension 721 of the compensation bimetal 720 by the coupling of the coupling protrusion 715 and the coupling groove 724 is in the middle of the first extended part 721 by the fastening member 730 .
  • Each portion is coupled with a compensation link 710 .
  • the compensation bimetal 720 inserted and coupled to the space of the body portion 711 does not swing in the vertical direction or the front-rear direction.
  • the shaft member 740 rotatably couples the compensation link 710 to the frame 100 . That is, the shaft member 740 functions as a rotation shaft of the compensation link 710 .
  • the shaft member 740 is rotatably coupled to the compensating link 710 . Specifically, the shaft member 740 is through-coupled to the rotation hole 717 formed through the inside of the head portion 713 .
  • the shaft member 740 is rotatably coupled to the frame 100 . Accordingly, when the compensating bimetal 720 is pressed, the compensating link 710 may be rotated clockwise or counterclockwise about the shaft member 740 .
  • the shaft member 740 has a circular cross-section and has a cylindrical shape extending in the front-rear direction. It will be understood that the shape of the shaft member 740 corresponds to the shape of the rotation hole 717 .
  • the temperature compensation mechanism 700 includes a compensation bimetal 720 .
  • the compensating bimetal 720 is formed in a structure in which the curved length due to the surrounding heat can be maximized. Accordingly, the temperature compensation mechanism 700 can be curved by a sufficient length even when a large amount of ambient heat is generated.
  • a temperature compensation mechanism 1300 according to the prior art is shown.
  • the shift moves and presses the underside of the compensating bimetal 1320 .
  • the bending direction B.D of the compensation bimetal 1320 is the same as the direction in which the main bimetal is curved and the direction in which the shift is curved.
  • the curved direction B.D of the compensating bimetal 1320 in FIG. 16A is the right side
  • the curved direction B.D of the compensation bimetal 1320 in FIG. 16B is the left side.
  • the part to which the rivet 1330 is fastened among the parts of the compensation bimetal 1320 is fixed, it is difficult to curve.
  • the upper portion of the compensation bimetal 1320 that is, the portion in contact with the compensation link 1310 , has a curvature limited by the compensation link 1310 .
  • the total amount of bending D is calculated as follows.
  • the total curvature D of the compensation bimetal 1320 according to the prior art depends only on the square of the curvature length B.L.
  • a temperature compensation mechanism 700 according to an embodiment of the present invention is illustrated.
  • the shifter 520 is moved to press the lower side of the third extension 723 of the compensating bimetal 720 .
  • the bending direction B.D of the compensation bimetal 720 is the same as the direction in which the main bimetal 400 is curved and the direction in which the shift is curved.
  • the bending direction B.D of the compensation bimetal 720 is the right side
  • the bending direction B.D of the compensation bimetal 720 is the left side.
  • the compensation bimetal 720 may be divided into a first extension part 721 , a second extension part 722 , and a third extension part 723 .
  • the first extension part 721 , the second extension part 722 , and the third extension part 723 are spaced apart from the body part 711 and the head part 713 by a predetermined distance, respectively.
  • each of the extension portions 721 , 722 , and 723 of the compensation bimetal 720 may be curved without being limited by the body portion 711 or the head portion 713 .
  • the amount of curvature D may be calculated as follows.
  • the total amount of curvature D of the compensation bimetal 720 is the length L1 of the first extension 721 , the outer diameter R of the second extension 722 and the third It all depends on the length L3 of the extension 723 .
  • the total amount of curvature D is increased compared to the compensation bimetal 1320 according to the prior art, and accordingly, the amount of ambient heat that can be compensated by the temperature compensation mechanism 700 may also be increased.

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Abstract

Sont divulgués ici un dispositif de compensation de température et un relais de surcharge thermique comportant ce dernier. Selon un mode de réalisation de la présente invention, un dispositif de compensation de température comporte une bilame de compensation accouplée à une liaison de compensation. La bilame de compensation s'étend le long de la liaison de compensation depuis l'extérieur de la liaison de compensation afin d'être formée de façon à présenter une longueur croissante et une longueur incurvée. Par conséquent, la longueur de déploiement de la bilame de compensation augmente en fonction des variations de température périphérique, de telle sorte que la fiabilité de fonctionnement du dispositif de compensation de température et du relais de surcharge thermique peut être améliorée.
PCT/KR2021/002811 2020-09-07 2021-03-08 Dispositif de compensation de température et relais de surcharge thermique comportant ce dernier Ceased WO2022050525A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020200113882A KR20220032286A (ko) 2020-09-07 2020-09-07 온도 보상 기구 및 이를 포함하는 열동형 과부하 계전기
KR10-2020-0113882 2020-09-07

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WO2022050525A1 true WO2022050525A1 (fr) 2022-03-10

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KR (1) KR20220032286A (fr)
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KR200225118Y1 (ko) * 2000-12-20 2001-05-15 엘지산전주식회사 열동형 과부하 계전기의 석방레버와 온도보상 바이메탈결합구조
JP3093323U (ja) * 2001-11-12 2003-05-09 エルジー産電株式会社 欠相保護用熱動型過負荷継電器
KR200411527Y1 (ko) * 2005-12-29 2006-03-15 엘에스산전 주식회사 열동형 과부하 계전기
KR20100003779U (ko) * 2008-09-30 2010-04-08 허성구 열동형 과부하 계전기의 온도보상 바이메탈과 석방레버의 결합구조
KR20130096081A (ko) * 2012-02-21 2013-08-29 현대중공업 주식회사 라운드타입의 바이메탈을 구비한 트립디바이스조립체

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Publication number Priority date Publication date Assignee Title
KR200304676Y1 (ko) 2002-11-18 2003-02-15 동아전기공업 주식회사 열동형 과부하 계전기의 고정구조
KR101052715B1 (ko) 2009-12-28 2011-07-29 주식회사 대륙 열동형 과부하 계전기

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200225118Y1 (ko) * 2000-12-20 2001-05-15 엘지산전주식회사 열동형 과부하 계전기의 석방레버와 온도보상 바이메탈결합구조
JP3093323U (ja) * 2001-11-12 2003-05-09 エルジー産電株式会社 欠相保護用熱動型過負荷継電器
KR200411527Y1 (ko) * 2005-12-29 2006-03-15 엘에스산전 주식회사 열동형 과부하 계전기
KR20100003779U (ko) * 2008-09-30 2010-04-08 허성구 열동형 과부하 계전기의 온도보상 바이메탈과 석방레버의 결합구조
KR20130096081A (ko) * 2012-02-21 2013-08-29 현대중공업 주식회사 라운드타입의 바이메탈을 구비한 트립디바이스조립체

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