CN217335048U

CN217335048U - Electric fire prevention current limiting type protector

Info

Publication number: CN217335048U
Application number: CN202220010299.9U
Authority: CN
Inventors: 王剑国; 金潇波; 徐胜
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-08-30
Anticipated expiration: 2032-01-05

Abstract

The utility model provides an electric fire prevention current-limiting formula protector, belongs to electric fire prevention technical field, including housing, base, power board, power strip, control display panel, radiator and radiator fan, the housing with base fixed connection forms current-limiting protector's casing, control display panel, power strip, radiator fan and power strip follow the direction of height of casing is upper and lower three-layer distribution, wherein: the control display panel is arranged on the top of the shell; the power panel, the radiator and the heat dissipation fan are arranged in the middle of the shell; the power board is arranged at the bottom of the shell. The advantages are that: the layout effect is ideal, the heat dissipation effect of the power device is improved, and the service life of the power device is prolonged; the structure is simplified, the installation is convenient, the volume is reduced, and the power density is increased.

Description

Electric fire prevention current-limiting protector

Technical Field

The utility model belongs to the technical field of the electric fire prevention, concretely relates to electric fire prevention current-limiting type protector.

Background

With the increasing demand for electric power in the whole society, the number of electric devices is also increased, and the accompanying problem of how to ensure the safety of the electric power is also more prominent. According to incomplete statistics, the method finds out through investigation on a plurality of fire accidents: the electrical fire caused by electrical short circuit, electric leakage and arc discharge always occupies the primary factor of fire accidents. Known electrical devices such as circuit breakers and air switches play an important role in protecting circuits from short-circuit and overload during the normal electricity utilization process, for example, when a short circuit occurs in a circuit, a power supply circuit (i.e., a power supply system) is disconnected from the power utilization circuit by automatic tripping of the circuit breaker serving as a mechanical switch, but due to the inherent characteristics of the mechanical switch, the circuit breaker is likely to cut off the power supply circuit for a long time, usually from several tens of milliseconds to several hundreds of milliseconds, and thus a short-circuiting device is likely to generate a large dangerous spark, and the high temperature and the arc generated by the spark are likely to cause a fire, an electric shock, and other safety accidents.

In order to make up the harm caused by the overlong time of breaking the fault current of a mechanical circuit breaker or an air switch, the method explores that a large-current power electronic device is used as a switch component to realize the breaking of load current, overload current and short-circuit current, for example, the defect of long time of breaking the fault circuit of the traditional circuit breaker and air switch can be overcome because the semiconductor power electronic device has the characteristics of high switching speed, non-contact breaking, long switching service life and the like. Because the speed of cutting off the power supply can be improved to microsecond level from millisecond pole by adopting the power electronic device, minute arc sparks can be formed at the short-circuit end, even the arc sparks cannot be seen, so that potential safety hazards such as voltage and current distortion, electric fire, electric shock accidents and the like caused by electric short circuit can be reduced to the maximum extent, and the electricity safety is ensured.

The electric fire-proof current-limiting protector adopts the power electronic device to control the on-off, and has the advantages that the power electronic device has certain voltage drop during the on-off process, and the loss and the heat generation are caused by the voltage drop, so a heat radiator, a heat radiation fan and the like are required to be configured. In the prior art, a protector control circuit, a power supply circuit, a power heating element, a radiator, a cooling fan and the like are arranged in the same cavity, heat generated by the heating element is radiated mutually to influence each other, and if the layout is unreasonable, the normal work of the protector is influenced, so that more severe requirements are provided for the structural design of the electric fireproof current-limiting protector, such as the layout.

Technical information related to the electric fire-proof current-limiting type protector can be found in published chinese patent documents, such as CN102983562B (electric fire-proof current-limiting type protector), CN106159876B (electric fire-proof current-limiting type protector and fault current detection method), CN109524948A (an electric fire-proof current-limiting type protector and its safe starting method), CN210156907U (an electric fire-proof current-limiting type protector) and CN210898501U (a current-limiting type electric fire-proof short-circuit protector), and so on. However, since the aforementioned patents, which are not limited to the circuit structure, are directed to the preferred and rational arrangement of the structural elements, there is no reference to solving the above mentioned technical problems, and the technical solutions to be described below are made in this context.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a help embodying the overall arrangement effect of ideal and can improve power device's heat dissipation and prolong its life, be favorable to embodying simple structure and simple to operate and can reduce the volume and can increase power density's electric fire prevention current-limiting type protector.

The utility model discloses a task is accomplished like this, an electric fire prevention current-limiting type protector, including housing, base, power board, power strip, control display panel, radiator and radiator fan, the housing with base fixed connection forms current-limiting protector's casing, control display panel, power strip, radiator fan and power strip follow the direction of height of casing is three-layer distribution about in being, wherein: the control display panel is arranged on the top of the shell; the power panel, the radiator and the heat dissipation fan are arranged in the middle of the shell; the power board is arranged at the bottom of the shell.

In a specific embodiment of the present invention, the control display panel is an operation display panel for operating the current-limiting protector and displaying corresponding data; the power panel is a voltage conversion circuit board which is used for converting input strong electricity into low-voltage direct current to supply power for the current-limiting protector control power supply, and the radiator and the radiating fan are radiating functional components of the current-limiting protector; the power board is provided with a power device for controlling the on-off of the circuit and a power device driving circuit serving the power device; the radiator and the radiating fan correspond to one side surface of the power device facing upwards.

In another specific embodiment of the present invention, an input connection terminal, an output connection terminal, and a peak voltage absorption circuit are further disposed on the power board; the input wiring terminal is arranged at the upper left part of the power board, the output wiring terminal is arranged at the lower left part of the power board, and the peak voltage absorption circuit is arranged at the middle left part of the power board; the power device and the power device driving circuit are arranged in the middle of the right side of the power board, and areas of the upper portion of the right side and the lower portion of the right side of the power board form a copper foil wiring area.

In another specific embodiment of the present invention, the heat sink is disposed on the top of the power device and closely contacts with an upward facing side surface of the power device, and the heat dissipation fan is disposed at an air outlet portion of the heat dissipation duct of the heat sink and adopts an air-draft heat dissipation manner.

In another specific embodiment of the present invention, the power panel is disposed side by side on the left side of the heat sink and is connected to the power circuit through the hard pin header, and the power panel is supported above the absorption circuit by the hard pin header.

The utility model discloses a still have a concrete embodiment the middle part of housing constitutes there is an upwards uplifted housing uplift, and this housing uplift has a device protection chamber, the control display panel set up the power strip with the top of radiator, and be located in the device protection intracavity is provided with liquid crystal display module, operating button, pilot lamp, bee calling organ and control circuit on the control display panel, operating button and pilot lamp respectively with set up operating button hole and pilot lamp hole on the housing uplift correspond.

In a more specific embodiment of the present invention, a heat sink mounting hole is formed on the heat sink, a power board mounting hole is formed on the power board at a position corresponding to the heat sink mounting hole, and a mounting screw sequentially passes through the heat sink mounting hole and the power board mounting hole to fix the power board together with the heat sink in the base.

In a further specific embodiment of the present invention, the base has a base cavity, a supporting pillar is disposed in the base cavity, a slot is formed on the supporting pillar, and the control display panel is fixed to the supporting pillar at a position corresponding to the slot, so as to fix the control display panel and the base relatively; the cover is provided with a first bayonet, the support column is provided with a first clamping pin at a position corresponding to the first bayonet, and the cover is fixed with the base at a position corresponding to the base cavity by the clamping fit of the first clamping pin and the first bayonet.

In a still more specific embodiment of the present invention, a second bayonet is disposed on the housing, a second locking pin is disposed in the cavity of the base and on the cavity wall of the cavity of the base, the second locking pin corresponds to the second bayonet, and the housing and the base are fixed by mutual engagement of the second locking pin and the second bayonet.

In yet another specific embodiment of the present invention, a guide rail mounting member is provided at the bottom of the base.

The utility model provides a technical scheme's technological effect lies in: because the control display panel, the power panel, the radiator, the radiating fan and the power panel are distributed in an upper layer, a middle layer and a lower layer along the height direction of the shell, the ideal layout effect can be embodied, the radiating effect of the power device is improved, and the service life of the power device is prolonged; since the functional parts are installed along the height direction of the housing, the structure is simplified and the installation is facilitated, and the volume is reduced and the power density is increased.

Drawings

Fig. 1 is an assembly structure diagram of the present invention.

Fig. 2 is a schematic view of fig. 1 with the cover removed.

Fig. 3 is a schematic external view of fig. 1 after assembly.

Detailed Description

In order to make the technical essence and advantages of the present invention more clearly understandable, the applicant below describes in detail embodiments, but the description of the embodiments is not a limitation of the solution of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not substantial, should be considered as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position state of fig. 1 as an example, and thus, it should not be understood as a specific limitation to the technical solution provided by the present invention.

Referring to fig. 1 to 3, there are shown a cover 16, a base 12, a power board 5, a power board 14, a control panel 2, a heat sink 4 and a heat dissipation fan 3, wherein the cover 16 and the base 12 are fixed to form a casing of a current limiting protector.

As the technical scheme provided by the utility model: the control panel 2, the power panel 14, the heat sink 4, the heat dissipation fan 3 and the power panel 5 are distributed in three layers from top to bottom along the height direction of the housing, wherein: the control display board 2 is arranged on the top of the shell; the power panel 14, the radiator 4 and the heat radiation fan 3 are arranged in the middle of the shell; the power board 5 is disposed at the bottom of the housing.

The control display panel 2 is an operation display panel for operating the current-limiting protector and displaying corresponding data; the power board 14 is a voltage conversion circuit board for converting strong current into low-voltage direct current to supply power to the current-limiting protector control power source, and the heat sink 4 and the heat dissipation fan 3 are heat dissipation functional components of the current-limiting protector; the power board 5 is provided with a power device 6 for controlling the on-off of the circuit and a power device driving circuit serving the power device 6; the aforementioned heat sink 4 together with the aforementioned heat radiation fan 3 corresponds to the upward-facing side surface of the aforementioned power device 6.

The power board 5 is further provided with an input terminal, an output terminal, and a peak voltage absorbing circuit, specifically: the input wiring terminal is arranged at the upper left part of the power board 5, the output wiring terminal is arranged at the lower left part of the power board 5, and the peak voltage absorption circuit is arranged at the middle left part of the power board 5; the power device 6 and the power device driving circuit are disposed in the middle of the right side of the power board 5, and the regions of the upper portion and the lower portion of the right side of the power board 5 are configured as large-area copper foil routing regions. The current flows into the left upper input terminal, flows to the input end of the right power device through the assembly plate copper foil, flows downwards to the assembly plate copper foil through the power device, and flows to the output terminal leftwards through the assembly plate copper foil.

The radiator 4 is disposed on the top of the power device 6 and closely contacts with the upward surface of one side of the power device 6, the heat dissipation fan 3 is disposed at the air outlet of the heat dissipation duct of the radiator 4, more specifically, a fan slot is disposed on the base 12, and the heat dissipation fan 3 is directly mounted in the fan slot and adopts an air-draft heat dissipation manner. The lower side wall of the base 12 is provided with an air inlet, the upper side wall is provided with an air outlet, so that a middle heat dissipation channel is formed, and the heat dissipation fan 3 is used for dissipating heat in an air-draft type mode, so that heat in the base cavity of the base 12 can be taken away, and the influence on the heat dissipation effect caused by the generation of eddy currents in the base cavity due to air blowing is avoided.

The power board 14 is arranged side by side on the left side of the heat sink 4 and the power board 14 is connected to the power circuit via hard pins, which simultaneously support the power board 14 above the absorption circuit.

As shown in fig. 1, a case swelling portion 17 which swells upward is formed in the middle of the case 16, the case swelling portion 17 has a device protection chamber 18, the control display panel 2 is disposed above the power supply board 14 and the heat sink 4 and is located in the device protection chamber 18, a liquid crystal display module, an operation button, an indicator lamp, a buzzer, and a control circuit which correspond to respective positions on the case 16 are provided on the control display panel 2, and the operation button and the indicator lamp correspond to an operation button hole and an indicator lamp hole which are provided on the case swelling portion 17, respectively.

The heat sink 4 is provided with a heat sink mounting hole, the power board 5 is provided with a power board mounting hole at a position corresponding to the heat sink mounting hole, the power board 5 and the heat sink 4 are fixed in the base 12 by mounting screws sequentially penetrating through the heat sink mounting hole (including an additionally arranged gasket) and the power board mounting hole, and the gasket is positioned between the heat sink 4 and the power board 5 and plays a role of limiting and supporting.

The base 12 has the base cavity mentioned above, the support columns 7 (four) are arranged in the base cavity, the support columns 7 are provided with the slots 10, the control display panel 2 is fixed with the support columns 7 at the positions corresponding to the slots 10, and the control display panel 2 is also fixed with the base 12 through the slots of the base; the cover 16 is provided with a first bayonet 1, the support post 7 is provided with a first locking pin 8 at a position corresponding to the first bayonet 1, and the cover 16 is fixed to the base 12 at a position corresponding to the base cavity by the locking of the first locking pin 8 and the first bayonet 1.

The housing 16 is provided with a second bayonet 15, a second engaging pin 11 is provided in the cavity of the base 12 and on the cavity wall of the cavity, the second engaging pin 11 corresponds to the second bayonet 15, and the housing 16 and the base 12 are fixed by the engagement of the second engaging pin 11 and the second bayonet 15. The connecting terminals 13 are shown in fig. 1 and 2.

As shown in fig. 2, the middle part of the front surface of the electric fire-proof current-limiting protector of the utility model is provided with a liquid crystal display window, an operation button and an indicator light; the upper left corner is an incoming line wiring area, and the lower left corner is an outgoing line wiring area city; the lower part of the right side is provided with a heat dissipation air duct air inlet, and the upper part of the right side is provided with a heat dissipation air duct air outlet; the bottom of the base 12 is provided with rail mounts 9 (i.e. standard rail mounts) for use mounting of the protector on the rails.

The utility model provides an electric fire-proof current-limiting protector aiming at the defects existing in the prior art, which has more reasonable structural layout, the interior adopts a three-layer structure arrangement, and the top is provided with a control display panel for facilitating the operation and observation of users; the middle part adopts the left and right sides to arrange, separately sets up heat source and other functional unit spare for high temperature area in the wind channel does not have control circuit or other temperature sensitive spare part, adopts the heat dissipation form of convulsions simultaneously, has avoided the vortex of blowing production in the casing, thereby has improved the radiating effect, has also avoided the influence of heat source to other device parts simultaneously, has protected power device effectively, improves the life of protector greatly. The reasonable structural layout ensures that the product is simple and convenient to assemble, and reduces the labor cost for production; the protector is small in overall size and high in power density, installation and use of a user are facilitated, and the volume cost is saved for the system.

Claims

1. The utility model provides an electric fire prevention current-limiting protector, includes housing (16), base (12), power board (5), power strip (14), control display panel (2), radiator (4) and radiator fan (3), housing (16) with base (12) fixed connection forms the casing of current-limiting protector, characterized in that control display panel (2), power strip (14), radiator (4), radiator fan (3) and power board (5) follow the direction of height of casing and are upper, middle and lower three-layer distribution, wherein: the control display panel (2) is arranged on the top of the shell; the power panel (14), the radiator (4) and the radiating fan (3) are arranged in the middle of the shell; the power board (5) is arranged at the bottom of the shell.

2. An electric fire protection current limiting protector according to claim 1, characterized in that the control display panel (2) is an operation display panel for operating the current limiting protector and displaying corresponding data; the power panel (14) is a voltage conversion circuit board which is used for converting input strong electricity into low-voltage direct current to supply power for the current-limiting protector control power supply, and the radiator (4) and the radiating fan (3) are radiating functional components of the current-limiting protector; a power device (6) for controlling the on-off of the circuit and a power device driving circuit serving the power device (6) are arranged on the power board (5); the radiator (4) and the heat radiation fan (3) correspond to one side surface of the power device (6) facing upwards.

3. An electric fire-proof current-limiting protector according to claim 2, characterized in that an input terminal, an output terminal and a peak voltage absorbing circuit are arranged on the power board (5); the input wiring terminal is arranged at the upper left part of the power board (5), the output wiring terminal is arranged at the lower left part of the power board (5), and the peak voltage absorption circuit is arranged at the middle left part of the power board (5); the power device (6) and the power device driving circuit are arranged in the middle of the right side of the power board (5), and the areas of the upper portion of the right side and the lower portion of the right side of the power board (5) form copper foil wiring areas.

4. An electric fire-proof current-limiting protector according to claim 2, characterized in that the radiator (4) is arranged on the top of the power device (6) and closely contacted with the upward side surface of the power device (6), the heat-radiating fan (3) is arranged at the air outlet part of the heat-radiating air duct of the radiator (4) and adopts an air-draft heat-radiating mode.

5. An electrical fire protection current limiting protector according to claim 1, characterized in that the power strip (14) is arranged side by side on the left side of the heat sink (4) and that the power strip (14) is connected to the power circuit by hard pins, the power strip (14) being supported above the absorption circuit by the hard pins.

6. An electric fire-proof current-limiting protector according to claim 1, characterized in that an upwardly-bulging housing bulging portion (17) is formed in the middle of said housing (16), said housing bulging portion (17) having a device protection chamber (18), said control display panel (2) being disposed above said power board (14) and said heat sink (4) and being located in said device protection chamber (18), a liquid crystal display module, an operation button, an indicator lamp, a buzzer and a control circuit being provided on the control display panel (2), said operation button and indicator lamp corresponding to an operation button hole and an indicator lamp hole respectively provided on said housing bulging portion (17).

7. An electric fire-proof current-limiting protector according to claim 1, characterized in that a heat sink mounting hole is opened on the heat sink (4), a power board mounting hole is opened on the power board (5) at a position corresponding to the heat sink mounting hole, and the power board (5) is fixed in the base (12) together with the heat sink (4) by mounting screws passing through the heat sink mounting hole and the power board mounting hole in sequence.

8. An electric fire-proof current-limiting protector according to claim 1, characterized in that the base (12) has a base cavity, a supporting column (7) is arranged in the base cavity, a slot (10) is formed on the supporting column (7), the control display panel (2) is fixed with the supporting column (7) at a position corresponding to the slot (10), thereby realizing the relative fixation of the control display panel (2) and the base (12); the cover (16) is provided with a first bayonet (1), the support column (7) is provided with a first clamping pin (8) at a position corresponding to the first bayonet (1), and the cover (16) is fixed with the base (12) at a position corresponding to the base cavity by the clamping fit of the first clamping pin (8) and the first bayonet (1).

9. An electric fire-proof current-limiting protector according to claim 8, characterized in that a second bayonet (15) is opened on the cover (16), a second clip leg (11) is provided in the base cavity of the base (12) and on the cavity wall of the base cavity, the second clip leg (11) corresponds to the second bayonet (15), and the cover (16) and the base (12) are fixed by the mutual engagement of the second clip leg (11) and the second bayonet (15).

10. An electrical fire protection current limiting protector according to any of claims 1-9, characterized in that a guide mounting (9) is provided at the bottom of the base (12).