CN219124676U - Heat radiation circuit of electric automatic control cabinet based on time delay closing - Google Patents
Heat radiation circuit of electric automatic control cabinet based on time delay closing Download PDFInfo
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- CN219124676U CN219124676U CN202223562863.7U CN202223562863U CN219124676U CN 219124676 U CN219124676 U CN 219124676U CN 202223562863 U CN202223562863 U CN 202223562863U CN 219124676 U CN219124676 U CN 219124676U
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Abstract
The utility model relates to the technical field of electrical control cabinets, in particular to a heat dissipation circuit of an electrical automation control cabinet based on delayed closing. In the utility model, when a main power switch is closed, a capacitor step-down rectifying circuit formed by capacitors C11 and C12, diodes D11 and D12 and resistors R11 and R12 in a circuit provides power, a fan B is driven to rotate so as to discharge heat in an electric automatic control cabinet, the power voltage charges a capacitor C14 through a resistor R17, the voltage at two ends of the capacitor C14 is slowly increased from O until a voltage comparator formed by comparators ICA and ICD outputs high level, a relay J is closed to short-circuit a switch S, at the moment, the switch S is disconnected, a cooling module circuit is not powered off, and the fan B continues to rotate so as to discharge residual heat in the electric automatic control cabinet until the electric quantity of the capacitor C14 is discharged.
Description
Technical Field
The utility model relates to the technical field of electrical control cabinets, in particular to a heat dissipation circuit of an electrical automatic control cabinet based on delayed closing.
Background
The electric automatic control cabinet is an electric cabinet serving as an electric control function, the control cabinet comprises a relay and a PLC, the relay is used for controlling the electric automatic control cabinet in a relatively simple mode, the PLC is generally used for controlling complex control, different controls are adopted by the electric automatic control cabinet according to different needs, and different electric elements are selected to be combined into one cabinet according to the number and the size of equipment to be controlled.
Because the electric automatization switch board contains a large amount of electronic components, can produce a large amount of heat when the operation, for example relate to an electric automatization control's heat dissipation switch board in CN107168426A, this switch board can reduce cabinet body temperature through being equipped with air inlet fan and air discharge fan, and set up the ceiling on the cabinet body, set up the cooling zone on the ceiling, on the one hand, the life-span of electric components in the extension switch board, on the other hand can guarantee that the switch board is placed in outdoor use, reach a cabinet dual-purpose, but because the electric automatization switch board is shut down, the power is cut off and is made the fan lose electricity stall, can't be with electric automatization switch board in remaining heat discharge, can't fine solution switch board's heat dissipation problem, consequently, put forward the heat dissipation circuit of electric automatization switch board based on time delay is closed.
Disclosure of Invention
The utility model aims to provide a heat dissipation circuit of an electric automatic control cabinet based on delayed closing so as to solve the problems in the background technology.
In order to achieve the above purpose, the utility model provides a heat dissipation circuit of an electric automation control cabinet based on time delay closing, which comprises a main power switch, a power supply module, a cooling module and a load, wherein the main power switch is connected with the power supply module and the cooling module, the power supply module is connected with the cooling module and the load, the main power switch controls the power supply of the power supply module and the cooling module, the power supply module is used for preventing surge current and supplying power for the cooling module and the load, and the cooling module is used for dissipating heat and is closed in time delay after the power supply is turned off so as to discharge residual heat.
As a further improvement of the technical scheme, the main power switch is a switch S, the power supply module comprises diodes D1, D2, D3, D4, D5 and D6, resistors R1 and R2, a driving circuit, a thyristor V, a field effect transistor VT, a transformer T, an inductance L and capacitors C0 and C1, wherein,
the diodes D1 and D2 are connected with the switch S in a common mode, the switch S is connected with 220V mains supply, the diodes D3 and D4 are connected with 220V mains supply in a common mode, the other end of the diode D1 is connected with the resistor R1, the thyristor V and the other end of the diode D3 in parallel, the other end of the diode D2 is connected with the driving circuit, the capacitor C1, the emitter of the field effect tube VT and the other end of the diode D4 in parallel, and the driving circuit is connected with the base electrode of the field effect tube VT;
the thyristor V is connected with the resistor R2 in parallel connection with the other end of the resistor R1 and the other end of the capacitor C1, the resistor R2 is connected with the main winding of the transformer T, and the other end of the main winding of the transformer T is connected with the collector electrode of the field effect transistor VT;
one end of the transformer T auxiliary winding is connected with the diode D5, the other end of the transformer T auxiliary winding is connected with the diode D6 in parallel and connected with the capacitor C0, the diode D5 is connected with the inductor L in parallel and connected with the other end of the diode D6, and the inductor L is connected with the other end of the capacitor C0.
As a further development of the solution, the cooling module comprises contacts J, resistors R11, R12, R13, R14, R15, R16, R17, R19, R21, capacitors C11, C12, C13, C14, a comparator ICA, ICB, ICC, ICD, diodes D11, D12, D13, D14, D15, a relay J, a fan B, a potentiometer Rp, wherein,
one end of the fan B is connected with the resistor R11 and the capacitor C11 in parallel connection with the contact J, the other end of the fan B is connected with the resistors R13, R15 and R19, the capacitors C12, C13 and C14, the diodes D11 and D15, the relay J is connected with the potentiometer Rp in parallel connection, the contact J is connected with the capacitor C0 in parallel connection with the switch S, the resistor R11 is connected with the diode D12 and the resistor R12 in parallel connection with the other end of the capacitor C11, the resistor R12 is connected with the other end of the diode D11, and the diode D12 is connected with the resistors R16 and R17 in parallel connection with the other end of the capacitor C12;
the 1 pin of the comparator ICA is connected with the 14 pin of the comparator ICD, the resistor R21 and the other end of the relay J in parallel, the other end of the diode D15, the 2 pin of the comparator ICA is connected with the diode D14, the 13 pin of the comparator ICD and the other end of the capacitor C14 in parallel, the other end of the resistor R17 is connected with the 3 pin of the comparator ICA is connected with the 12 pin of the comparator ICD, the other end of the resistor R21 and the other end of the potentiometer Rp and the other end of the resistor R16 in parallel;
the pin 5 of the comparator ICB is connected with the potentiometer Rp, the pin 6 of the comparator ICB is connected with the diode D13, the other end of the resistor R19 is connected with the other end of the capacitor C13 in parallel, and the pin 7 of the comparator ICB is connected with the other end of the diode D14;
the 8 pin of the comparator ICC is connected with the resistor R14 and connected with the other end of the diode D13 in parallel, the 9 pin of the comparator ICC is connected with the other end of the resistor R14 and the other end of the resistor R15, and the 10 pin of the comparator ICC is connected with the other end of the resistor R13.
As a further development of the solution, the cooling module further comprises resistors R18, R20, light emitting diodes LED1, LED2, wherein,
the diode D12 is connected with the resistor R18, the resistor R18 is connected with the light emitting diode LED1, the light emitting diode LED1 is connected with the pin 7 of the comparator ICB, the light emitting diode LED2 is connected with the other end of the diode D14 in parallel, the light emitting diode LED2 is connected with the resistor R20, and the resistor R20 is connected with the relay J.
As a further improvement of the technical scheme, the switch S is a fuse type isolating switch.
Compared with the prior art, the utility model has the beneficial effects that:
in the heat dissipation circuit of the electric automatic control cabinet based on time delay closing, when a main power switch is closed, a capacitor step-down rectifying circuit formed by capacitors C11 and C12, diodes D11 and D12 and resistors R11 and R12 in the circuit provides power, a fan B is driven to rotate to discharge heat in the electric automatic control cabinet, the power voltage charges a capacitor C14 through a resistor R17, the voltage at two ends of the capacitor C14 is slowly increased from O until a voltage comparator formed by comparators ICA and ICD outputs a high level, a relay J sucking contact J is closed to short-circuit a switch S, at the moment, the switch S is disconnected, a cooling module circuit is not powered off, and the fan B continues to rotate to discharge residual heat in the electric automatic control cabinet until the electric quantity of the capacitor C14 is discharged.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a circuit diagram of a power module according to the present utility model;
fig. 3 is a circuit diagram of a cooling module of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 1-3, the embodiment provides a heat dissipation circuit of an electric automation control cabinet based on delay closing, which comprises a main power switch, a power supply module, a cooling module and a load, wherein the main power switch is connected with the power supply module and the cooling module, the power supply module is connected with the cooling module and the load, the main power switch controls the power on of the power supply module and the cooling module, the power supply module is used for preventing surge current and supplying power to the cooling module and the load, the cooling module is used for dissipating heat, the cooling module is closed in delay after the power is turned off so as to discharge residual heat, and the load is a power consumption component in the electric automation control cabinet.
The power supply module is conducted with the cooling module circuit when the main power switch is closed, the power supply module is connected with the mains supply, the power supply module rectifies and filters the mains supply and supplies power to the cooling module and the load, so that the cooling module continuously discharges heat in the electric automation control cabinet, after the main power switch is opened, the power supply module is not conducted with the cooling module circuit, the power supply module is disconnected with the mains supply, power is not supplied to the cooling module and the load any more, the shutdown of the electric automation control cabinet is realized, and the cooling module is closed in a delayed mode to discharge residual heat in the electric automation control cabinet.
In the utility model, in order to avoid damaging a circuit by surge current, a total power switch is a switch S, a power supply module comprises diodes D1, D2, D3, D4, D5 and D6, resistors R1 and R2, a driving circuit, a thyristor V, a field effect transistor VT, a transformer T, an inductance L and capacitors C0 and C1, wherein,
the common end of the diodes D1 and D2 is connected with a switch S, the switch S is connected with 220V mains supply, the common end of the diodes D3 and D4 is connected with 220V mains supply, the other end of the diode D1 is connected with a resistor R1 and a thyristor V in parallel, the other end of the diode D3 is connected with the other end of the diode D2 in parallel, the other end of the diode D2 is connected with a driving circuit, a capacitor C1 and the emitter of a field effect tube VT in parallel, and the driving circuit is connected with the base of the field effect tube VT;
the thyristor V is connected with the resistor R2 and connected with the other end of the resistor R1 and the other end of the capacitor C1 in parallel, the resistor R2 is connected with the main winding of the transformer T, and the other end of the main winding of the transformer T is connected with the collector electrode of the field effect transistor VT;
one end of the secondary winding of the transformer T is connected with a diode D5, the other end of the secondary winding of the transformer T is connected with a diode D6 and a parallel capacitor C0, the diode D5 is connected with an inductor L and the other end of the parallel diode D6, and the inductor L is connected with the other end of the capacitor C0.
At the moment of power on, the input voltage charges the capacitor C1 through a rectifier bridge formed by the diodes D1, D2, D3 and D4 and the current limiting resistor R1 to limit surge current, when the capacitor C1 is charged to about 80% of rated voltage, the circuit works normally, a trigger signal of the thyristor V is generated through the winding of the transformer T, the thyristor V is conducted and short-circuited to the current limiting resistor R1, and the switching power supply is in a normal running state.
In order to delay the closing to remove the residual heat in the electric automation control cabinet, the cooling module comprises a contact J, resistors R11, R12, R13, R14, R15, R16, R17, R19, R21, capacitors C11, C12, C13, C14, a comparator ICA, ICB, ICC, ICD, diodes D11, D12, D13, D14, D15, a relay J, a fan B, a potentiometer Rp, wherein,
one end of the fan B is connected with the resistor R11, the capacitor C11 and the contact J in parallel, the other end of the fan B is connected with the resistors R13, R15 and R19, the capacitors C12, C13 and C14, the diodes D11 and D15 and the relay J are connected with the potentiometer Rp in parallel, the contact J is connected with the capacitor C0 in parallel, the contact J is connected with the switch S in parallel, the resistor R11 is connected with the diode D12 and the resistor R12 and connected with the other end of the capacitor C11 in parallel, the resistor R12 is connected with the other end of the diode D11, and the diode D12 is connected with the other ends of the resistors R16 and R17 and connected with the capacitor C12 in parallel;
the 1 pin of the comparator ICA is connected with the 14 pin of the comparator ICD, the resistor R21 and the other end of the relay J in parallel, the other end of the diode D15, the 2 pin of the comparator ICA is connected with the diode D14, the 13 pin of the comparator ICD and the other end of the capacitor C14, the other end of the resistor R17, the 3 pin of the comparator ICA is connected with the 12 pin of the comparator ICD, the other end of the resistor R21 and the other end of the potentiometer Rp and the other end of the resistor R16 in parallel;
the 5 pin of the comparator ICB is connected with the potentiometer Rp, the 6 pin of the comparator ICB is connected with the diode D13, the other end of the resistor R19 is connected with the other end of the capacitor C13 in parallel, and the 7 pin of the comparator ICB is connected with the other end of the diode D14;
the 8 pin resistor R14 of the comparator ICC is connected with the other end of the diode D13 in parallel, the 9 pin resistor R14 of the comparator ICC is connected with the other end of the resistor R14 and the other end of the resistor R15, and the 10 pin resistor R13 of the comparator ICC is connected with the other end of the resistor R13.
When the switch S is closed, a capacitor step-down rectifying circuit formed by capacitors C11 and C12, diodes D11 and D12 and resistors R11 and R12 in the circuit provides power to drive the fan B to rotate so as to discharge heat in the electric automatic control cabinet, the power voltage charges the capacitor C14 through the resistor R17, the voltage at two ends of the capacitor C14 is slowly increased from O until a voltage comparator formed by comparators ICA and ICD outputs high level, the pull-in contact J of the relay J is closed so as to short-circuit the switch S, at the moment, the switch S is disconnected, the circuit cannot be disconnected, the fan B continues to rotate so as to discharge residual heat in the electric automatic control cabinet, the pin 7 of the comparator ICB outputs low level, the diode D14 discharges the capacitor C14 and inhibits the resistor R17 from charging the capacitor C14, the relay J keeps pulling in until the fan B is out of electricity after the capacitor C14 is discharged.
In order to show the operating state of the circuit, the cooling module further comprises resistors R18, R20, light emitting diodes LED1, LED2, wherein,
the diode D12 is connected with the resistor R18, the resistor R18 is connected with the light emitting diode LED1, the light emitting diode LED1 is connected with the pin 7 of the comparator ICB, the light emitting diode LED2 is connected with the other end of the diode D14 in parallel, the light emitting diode LED2 is connected with the resistor R20, and the resistor R20 is connected with the relay J.
When the switch S is closed, the pin 7 of the comparator ICB in the circuit outputs a high level to drive the light emitting diode LED2 to light, and when the switch S is opened, the pin 7 of the comparator ICB outputs a low level to drive the light emitting diode LED1 to light, so that the working state of the circuit is conveniently known.
In order to avoid circuit overload damage, switch S is the fusing type isolator, and the fusing type isolator can melt the fuse-element and break the circuit under the condition that the circuit takes place the load too high, and the switch fuses fastly, comparatively in time to the temperature-sensing, can cut off the circuit more fast effectively, and protection circuit does not receive bigger harm.
When the heat dissipation circuit of the electric automation control cabinet based on time delay closing is specifically used, a main power switch, namely a power supply module is conducted with a cooling module circuit when a switch S is closed, external input voltage charges a capacitor C1 through a rectifier bridge and a current limiting resistor R1 to limit surge current, a capacitor step-down rectifying circuit formed by capacitors C11 and C12, diodes D11 and D12 and resistors R11 and R12 in the circuit provides power to drive a fan B to rotate and discharge heat in the electric automation control cabinet, the power supply voltage charges a capacitor C14 through a resistor R17, voltage at two ends of the capacitor C14 is slowly increased by O until a voltage comparator formed by a comparator ICA and an ICD outputs high level, a relay J sucking contact J is closed to short the switch S, the switch S is disconnected at the moment, the power supply module and the cooling module circuit are not conducted, power is turned off by a power component in the electric automation control cabinet, but the cooling module circuit is not powered off, the fan B continues to rotate and discharge residual heat in the electric automation control cabinet, a pin 7 of the comparator B outputs low level, the diode D14 makes the capacitor C14 slowly rise until the capacitor C14 is kept to suck the residual heat in the electric automation control cabinet, the capacitor C14 is discharged, and the purpose of stopping the electric automation control cabinet is achieved.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. Heat radiation circuit of electric automatization switch board based on delay is closed, its characterized in that: the cooling device comprises a main power switch, a power supply module, a cooling module and a load, wherein the main power switch is connected with the power supply module and the cooling module, the power supply module is connected with the cooling module and the load, the main power switch controls the power supply module and the cooling module to be electrified, the power supply module is used for preventing surge current and supplying power for the cooling module and the load, and the cooling module is used for radiating heat and is closed in a delayed manner after the power supply is turned off so as to discharge residual heat.
2. The delay-shutdown-based heat dissipation circuit of an electrical automation control cabinet of claim 1, wherein: the main power switch is a switch S, the power supply module comprises diodes D1, D2, D3, D4, D5 and D6, resistors R1 and R2, a driving circuit, a thyristor V, a field effect tube VT, a transformer T, an inductance L and capacitors C0 and C1, wherein,
the diodes D1 and D2 are connected with the switch S in a common mode, the switch S is connected with 220V mains supply, the diodes D3 and D4 are connected with 220V mains supply in a common mode, the other end of the diode D1 is connected with the resistor R1, the thyristor V and the other end of the diode D3 in parallel, the other end of the diode D2 is connected with the driving circuit, the capacitor C1, the emitter of the field effect tube VT and the other end of the diode D4 in parallel, and the driving circuit is connected with the base electrode of the field effect tube VT;
the thyristor V is connected with the resistor R2 in parallel connection with the other end of the resistor R1 and the other end of the capacitor C1, the resistor R2 is connected with the main winding of the transformer T, and the other end of the main winding of the transformer T is connected with the collector electrode of the field effect transistor VT;
one end of the transformer T auxiliary winding is connected with the diode D5, the other end of the transformer T auxiliary winding is connected with the diode D6 in parallel and connected with the capacitor C0, the diode D5 is connected with the inductor L in parallel and connected with the other end of the diode D6, and the inductor L is connected with the other end of the capacitor C0.
3. The delay-shutdown-based heat dissipation circuit of an electrical automation control cabinet of claim 2, wherein: the cooling module comprises a contact J, resistors R11, R12, R13, R14, R15, R16, R17, R19 and R21, capacitors C11, C12, C13 and C14, a comparator ICA, ICB, ICC, ICD, diodes D11, D12, D13, D14 and D15, a relay J, a fan B and a potentiometer Rp, wherein,
one end of the fan B is connected with the resistor R11 and the capacitor C11 in parallel connection with the contact J, the other end of the fan B is connected with the resistors R13, R15 and R19, the capacitors C12, C13 and C14, the diodes D11 and D15, the relay J is connected with the potentiometer Rp in parallel connection, the contact J is connected with the capacitor C0 in parallel connection with the switch S, the resistor R11 is connected with the diode D12 and the resistor R12 in parallel connection with the other end of the capacitor C11, the resistor R12 is connected with the other end of the diode D11, and the diode D12 is connected with the resistors R16 and R17 in parallel connection with the other end of the capacitor C12;
the 1 pin of the comparator ICA is connected with the 14 pin of the comparator ICD, the resistor R21 and the other end of the relay J in parallel, the other end of the diode D15, the 2 pin of the comparator ICA is connected with the diode D14, the 13 pin of the comparator ICD and the other end of the capacitor C14 in parallel, the other end of the resistor R17 is connected with the 3 pin of the comparator ICA is connected with the 12 pin of the comparator ICD, the other end of the resistor R21 and the other end of the potentiometer Rp and the other end of the resistor R16 in parallel;
the pin 5 of the comparator ICB is connected with the potentiometer Rp, the pin 6 of the comparator ICB is connected with the diode D13, the other end of the resistor R19 is connected with the other end of the capacitor C13 in parallel, and the pin 7 of the comparator ICB is connected with the other end of the diode D14;
the 8 pin of the comparator ICC is connected with the resistor R14 and connected with the other end of the diode D13 in parallel, the 9 pin of the comparator ICC is connected with the other end of the resistor R14 and the other end of the resistor R15, and the 10 pin of the comparator ICC is connected with the other end of the resistor R13.
4. The delay shutdown-based heat dissipation circuit of an electrical automation control cabinet of claim 3, wherein: the cooling module further comprises resistors R18, R20, light emitting diodes LED1, LED2, wherein,
the diode D12 is connected with the resistor R18, the resistor R18 is connected with the light emitting diode LED1, the light emitting diode LED1 is connected with the pin 7 of the comparator ICB, the light emitting diode LED2 is connected with the other end of the diode D14 in parallel, the light emitting diode LED2 is connected with the resistor R20, and the resistor R20 is connected with the relay J.
5. The delay-shutdown-based heat dissipation circuit of an electrical automation control cabinet of claim 2, wherein: the switch S is a fusing type isolating switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223562863.7U CN219124676U (en) | 2022-12-30 | 2022-12-30 | Heat radiation circuit of electric automatic control cabinet based on time delay closing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223562863.7U CN219124676U (en) | 2022-12-30 | 2022-12-30 | Heat radiation circuit of electric automatic control cabinet based on time delay closing |
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| CN219124676U true CN219124676U (en) | 2023-06-02 |
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