Circuit breaker with good heat dissipation effect

Abstract

The utility model discloses a circuit breaker with a good heat dissipation effect, which comprises a circuit breaker and a circuit breaker guide rail, a clamping groove is arranged at the back of the circuit breaker, a heat conducting plate is embedded in the clamping groove, the heat conducting plate is connected with a cavity of the circuit breaker, heat dissipation fins are fixedly connected at the back of the heat conducting plate, air exhaust through holes are arranged in the heat dissipation fins, and the air exhaust through holes are communicated with the air exhaust through holes. A small motor is fixedly connected to the back of the heat conducting plate through a support, a transmission shaft is fixedly connected to the output end of the small motor, blades are fixedly connected to the transmission shaft, installation sliding grooves are formed in the positions, above and below the clamping grooves, of the back of the circuit breaker, and limiting bolt blocks are installed in the installation sliding grooves in a sliding mode. The heat conduction plate and the transmission shaft are matched with each other, heat in the circuit breaker can be quickly spread to the outside, meanwhile, the heat dissipation fins are used for heat dissipation, holes are prevented from being formed in the circuit breaker, the sealing performance of an inner cavity of the circuit breaker is guaranteed, and external dust and water stains are effectively prevented from entering the circuit breaker.

Description

Technical Field

[0001] The utility model relates to a circuit breaker, in particular to a circuit breaker with good heat dissipation effect. Background Art

[0002] As an important component in the power field, circuit breakers generate a lot of heat during their operation, causing the temperature inside the circuit breaker housing to gradually rise, thereby affecting the performance of the circuit breaker. It is necessary to set a heat dissipation structure in the short-circuit breaker to ensure the normal use of the circuit breaker.

[0003] For example, a heat dissipation type molded case circuit breaker disclosed in Chinese patent publication number CN219998125U includes an upper shell, a lower shell, a fixing plate, a disassembly assembly and a dustproof assembly. The lower shell is mounted on the fixing plate, and the upper shell is mounted on the lower shell through the disassembly assembly. The dustproof assembly includes a dustproof plate, a positioning block, a pull rod, a slider and a heat dissipation component. The dustproof plate is mounted on the upper shell through the heat dissipation component, the positioning block is mounted on the dustproof plate, the pull rod is mounted on the dustproof plate, and the slider is mounted on the dustproof plate. When the circuit breaker is in use, the electrical components of the circuit breaker generate heat, and the heat is dissipated through the heat dissipation component. The dustproof plate protects the heat dissipation component from dust, the pull rod and the slider pull the dustproof plate, and the dustproof plate is conveniently removed for cleaning. The positioning block fixes the placement of the dustproof plate, thereby preventing the dustproof plate from dust-proofing and preventing dust from entering the interior of the circuit breaker, causing dust accumulation inside the circuit breaker, affecting the operation of the internal components of the circuit breaker, and causing a short circuit.

[0004] Some problems were found during the use of the above-mentioned existing heat dissipation molded case circuit breaker. First, the circuit breaker needs to be in working condition and needs to be connected to the power supply line. During the process of removing and installing the dust cover, there is a certain risk of electric shock, which is relatively dangerous. Secondly, there are heat dissipation holes, and there is a certain risk of water entering the circuit breaker, causing damage to the internal mechanism. Utility Model Content

[0005] The purpose of the present invention is to provide a circuit breaker with good heat dissipation effect, so as to solve the existing problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A circuit breaker with good heat dissipation effect, comprising a circuit breaker and a circuit breaker guide rail, a clamping groove being provided at the rear of the circuit breaker, a heat conducting plate being embedded and installed in the clamping groove, the heat conducting plate being connected to the circuit breaker cavity, a heat dissipation fin being fixedly connected to the rear of the heat conducting plate, an exhaust through-hole being provided in the heat dissipation fin, a small motor being fixedly connected to the rear of the heat conducting plate through a bracket, a transmission shaft being fixedly connected to the output end of the small motor, a blade being fixedly connected to the transmission shaft, an installation slide groove being provided at the rear of the circuit breaker and located above and below the clamping groove, a limit pin block being slidably installed in the installation slide groove.

[0007] Preferably, heat conducting rods are embedded and installed on both sides of the circuit breaker, a dovetail slot is provided in the installation slot, a dovetail slider is fixed to the front of the limit latch block, and the dovetail slider is slidably matched with the dovetail slot.

[0008] Preferably, a plurality of insulating protrusions are fixed to the front of the heat conducting plate, and two groups of bearing seats are fixed symmetrically to the back of the heat conducting plate, and the bearing seats are rotatably matched with the transmission shaft.

[0009] Preferably, a return spring is fixedly connected to one side of the dovetail slider, and the other end of the return spring is fixedly connected to the inner wall of the dovetail slot.

[0010] Preferably, an L-shaped plate is fixedly connected to one side of the limit latch block, a through hole is opened on the upper and lower sides of the circuit breaker, the installation slide groove is communicated with the inside of the through hole, and the L-shaped plate is slidably matched with the through hole.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The heat conduction plate and the transmission shaft cooperate with each other to quickly dissipate the heat inside the circuit breaker to the outside. At the same time, the heat dissipation fins are used to dissipate heat, avoiding the need to open holes on the circuit breaker, ensuring the sealing of the internal chamber of the circuit breaker, and effectively preventing external dust and water stains from entering the circuit breaker.

[0013] 2. By setting the limit latch block, the circuit breaker can be clamped on the circuit breaker guide rail. Moving the L-shaped dial plate drives the limit latch block into the installation slot. At this time, the circuit breaker can be removed or installed on the circuit breaker guide rail by moving it back and forth, which is convenient for installation and removal of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the utility model in the installed state;

[0016] Figure 3 It is a left view of the utility model;

[0017] Figure 4 This is an exploded view of the heat conducting plate of the present utility model;

[0018] Figure 5 This is a schematic structural diagram of the limit latch block of the utility model.

[0019] In the figure: 1. Circuit breaker; 101. Thermal rod; 102. Snap-in slot; 103. Mounting slide; 104. Dovetail slide; 2. Thermal plate; 201. Insulation bump; 202. Heat sink; 203. Bearing seat; 204. Exhaust hole; 3. Drive shaft; 301. Blade; 302. Small motor; 4. Limit latch block; 401. Dovetail slider; 402. Return spring; 403. L-shaped dial plate; 5. Circuit breaker guide rail. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-5 The utility model provides a technical solution: a circuit breaker with good heat dissipation effect, including a circuit breaker 1 and a circuit breaker guide rail 5. A clamping groove 102 is provided at the back of the circuit breaker 1, and a heat conducting plate 2 is embedded and installed in the clamping groove 102. The heat conducting plate 2 is connected to the cavity of the circuit breaker 1, and a heat dissipation fin 202 is fixed to the back of the heat conducting plate 2. An exhaust through hole 204 is provided in the heat dissipation fin 202. A small motor 302 is fixed to the back of the heat conducting plate 2 through a bracket, and a transmission shaft 3 is fixed to the output end of the small motor 302. A blade 301 is fixed to the transmission shaft 3. An installation slide groove 103 is provided at the back of the circuit breaker 1 and above and below the clamping groove 102. A limit latch block 4 is slidably installed in the installation slide groove 103.

[0022] In this embodiment, the heat conducting plate 2 contacts the internal cavity of the circuit breaker 1, and the heat inside the circuit breaker 1 is conducted to the heat conducting plate 2. The heat conducting plate 2 can dissipate the heat to the outside by using the heat dissipating fins 202, thereby increasing the overall heat dissipation capacity of the circuit breaker 1. When the circuit breaker 1 is working under high load, it is impossible to provide natural heat dissipation to reduce the internal temperature of the circuit breaker 1. Starting the small motor 302 can drive the drive shaft 3 to rotate. The rotation of the drive shaft 3 can drive the blades 301 to rotate. The blades 301 can agitate air through the exhaust holes 204, accelerating the air circulation between the heat dissipating fins 202, thereby enabling the heat dissipating fins 202 to accelerate the heat dissipation and quickly reduce the temperature inside the circuit breaker 1. The limit latch block 4 cooperates with the circuit breaker guide rail 5 to clamp and fix the circuit breaker 1 to the circuit breaker guide rail 5, and the heat conducting plate 2 and the insulating protrusion 201 are located in the groove at the center of the circuit breaker guide rail 5 to avoid interference with the circuit breaker guide rail 5.

[0023] Among them, in order to achieve the purpose of leaving a distance between adjacent installed circuit breakers 1, the present device adopts the following technical solution: heat conducting rods 101 are embedded and installed on both sides of the circuit breaker 1, a dovetail slide 104 is opened in the installation slide 103, a dovetail slider 401 is fixed to the front of the limit latch block 4, the dovetail slider 401 slides in conjunction with the dovetail slide 104, a number of insulating protrusions 201 are fixed to the front of the heat conducting plate 2, and two sets of bearing seats 203 are symmetrically fixed to the back of the heat conducting plate 2, and the bearing seats 203 rotate in conjunction with the transmission shaft 3.

[0024] The heat conducting rod 101 is used to prevent the circuit breakers 1 installed on the same circuit breaker guide rail 5 from being attached to each other, so that a certain gap is left between the circuit breakers 1 to facilitate air flow. At the same time, the heat conducting rod 101 is inserted into the circuit breaker 1 to assist in the discharge of heat and further increase the heat dissipation capacity. The dovetail slider 401 slides with the dovetail slot 104, so that the limit pin block 4 can be slidably installed inside the installation slot 103. The bearing seat 203 rotates with the transmission shaft 3, so that the transmission shaft 3 can rotate stably inside the exhaust hole 204. The front of the insulating protrusion 201 is located in the internal cavity of the circuit breaker 1. The insulating protrusion 201 can avoid the problem of leakage caused by contact between the heat conducting plate 2 and internal components.

[0025] Among them, in order to facilitate the removal of the circuit breaker 1, the present device adopts the following technical solutions: a return spring 402 is fixedly connected to one side of the dovetail slider 401, and the other end of the return spring 402 is fixedly connected to the inner wall of the dovetail slot 104. An L-shaped dial plate 403 is fixedly connected to one side of the limit latch block 4. A through hole is opened on the upper and lower surfaces of the circuit breaker 1, the mounting slot 103 is communicated with the inside of the through hole, and the L-shaped dial plate 403 slides in cooperation with the through hole.

[0026] The return spring 402 can provide a certain thrust for the dovetail slider 401. The dovetail slider 401 will drive the limit latch block 4 to move under the thrust, so that the limit latch block 4 is stuck on the convex edge of the circuit breaker guide rail 5, and the circuit breaker 1 is clamped on the circuit breaker guide rail 5. The L-shaped dial plate 403 passes through the through hole and fits the upper and lower sides of the circuit breaker 1. When the circuit breaker 1 needs to be removed, the L-shaped dial plate 403 can be moved to drive the limit latch block 4 to move into the installation slide groove 103, so as to release the restriction on the circuit breaker guide rail 5. At this time, the circuit breaker 1 can be easily removed.

[0027] The working principle and usage process of the present invention are as follows: when in use, the device needs to be clamped on the circuit breaker guide rail 5, the heat conducting plate 2 and the insulating protrusion 201 will be inside the groove at the center of the circuit breaker guide rail 5, and the heat inside the circuit breaker 1 will be conducted to the heat conducting plate 2. The heat conducting plate 2 can dissipate the heat to the outside world by using the heat dissipation fins 202, thereby increasing the overall heat dissipation capacity of the circuit breaker 1. Starting the small motor 302 can drive the transmission shaft 3 to rotate, and the rotation of the transmission shaft 3 can drive the blades 301 to rotate. The blades 301 can be used to agitate air through the exhaust holes 204, accelerating the air circulation between the heat dissipation fins 202, thereby enabling the heat dissipation fins 202 to accelerate the heat dissipation and quickly reduce the temperature inside the circuit breaker 1.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit breaker with good heat dissipation effect, comprising a circuit breaker (1) and a circuit breaker guide rail (5), characterized in that: A snap-in slot (102) is provided at the rear of the circuit breaker (1), a heat conducting plate (2) is embedded and installed in the snap-in slot (102), the heat conducting plate (2) is connected to the cavity of the circuit breaker (1), a heat dissipation fin (202) is fixedly connected to the rear of the heat conducting plate (2), an exhaust hole (204) is provided in the heat dissipation fin (202), a small motor (302) is fixedly connected to the rear of the heat conducting plate (2) through a bracket, a transmission shaft (3) is fixedly connected to the output end of the small motor (302), a blade (301) is fixedly connected to the transmission shaft (3), an installation slide slot (103) is provided at the rear of the circuit breaker (1) and located above and below the snap-in slot (102), a limit pin block (4) is slidably installed in the installation slide slot (103).

2. A circuit breaker with good heat dissipation effect according to claim 1, characterized in that: Heat conducting rods (101) are embedded and installed on both sides of the circuit breaker (1); a dovetail slot (104) is provided in the installation slot (103); a dovetail slider (401) is fixedly connected to the front of the limit latch block (4); and the dovetail slider (401) is slidably matched with the dovetail slot (104).

3. A circuit breaker with good heat dissipation effect according to claim 1, characterized in that: The front of the heat conducting plate (2) is fixedly connected with a plurality of insulating protrusions (201), and the rear of the heat conducting plate (2) is fixedly connected with two groups of bearing seats (203) in a left-right symmetrical manner. The bearing seats (203) are rotatably matched with the transmission shaft (3).

4. A circuit breaker with good heat dissipation effect according to claim 2, characterized in that: A return spring (402) is fixedly connected to one side of the dovetail slider (401), and the other end of the return spring (402) is fixedly connected to the inner wall of the dovetail slot (104).

5. The circuit breaker with good heat dissipation effect according to claim 1, characterized in that: An L-shaped shift plate (403) is fixedly connected to one side of the limit latch block (4); a through hole is provided on the upper and lower sides of the circuit breaker (1); the mounting slot (103) is communicated with the interior of the through hole; and the L-shaped shift plate (403) is slidably engaged with the through hole.

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