CN113937748A - Direct current power supply equipment and direct current distribution box - Google Patents
Direct current power supply equipment and direct current distribution box Download PDFInfo
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- CN113937748A CN113937748A CN202111216424.8A CN202111216424A CN113937748A CN 113937748 A CN113937748 A CN 113937748A CN 202111216424 A CN202111216424 A CN 202111216424A CN 113937748 A CN113937748 A CN 113937748A
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- power supply
- selection device
- power
- direct current
- box
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/109—Scheduling or re-scheduling the operation of the DC sources in a particular order, e.g. connecting or disconnecting the sources in sequential, alternating or in subsets, to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/243—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for DC systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The application relates to a direct current power supply equipment and direct current block terminal. The direct current power supply apparatus includes: a plurality of DC power supplies; the power supply selection device comprises an input end, an output end and a control end, wherein the input end of the power supply selection device is connected with each direct-current power supply and is used for switching the direct-current power supplies; the undervoltage protection device is used for being connected between the output end of the power supply selection device and the load and disconnecting the output end of the power supply selection device from the load when the output voltage of the output end of the power supply selection device is lower than a preset voltage; the controller is connected with the control end of the power supply selection device and used for acquiring the state of each direct current power supply; if the direct current power supply gated by the power supply selection device is in a fault state, outputting a control command to a control end of the power supply selection device; the control command is used to instruct the power selection device to cut off the dc power supply in the fault state and gate the dc power supply to be in the normal state. The direct current power supply equipment not only ensures the quality of electric energy, but also improves the reliability of power supply.
Description
Technical Field
The application relates to the technical field of direct current power supply, in particular to direct current power supply equipment and a direct current distribution box.
Background
At present, in each field, a direct current power distribution cabinet is widely applied, the direct current power distribution cabinet can divide total input direct current into multiple paths according to the quantity of loads, and the direct current power distribution cabinet has the main functions of distributing, monitoring and protecting direct current electric energy and providing stable and reliable direct current power supplies for various power utilization devices.
However, the direct current power supply equipment in the prior art has the problem of poor power supply reliability.
Disclosure of Invention
In view of the above, it is necessary to provide a dc power supply apparatus and a dc distribution box capable of improving power supply reliability.
In one aspect, an embodiment of the present invention provides a dc power supply device, including: a plurality of DC power supplies; the power supply selection device comprises an input end, an output end and a control end, wherein the input end of the power supply selection device is connected with each direct-current power supply and used for switching the direct-current power supplies; the under-voltage protection device is connected between the output end of the power supply selection device and a load, and the output end of the power supply selection device is disconnected with the load when the output voltage of the output end of the power supply selection device is lower than a preset voltage; the controller is connected with the control end of the power supply selection device and used for acquiring the state of each direct current power supply; if the direct-current power supply gated by the power supply selection device is in a fault state, outputting a control command to a control end of the power supply selection device; the control command is used for instructing the power selection device to cut off the direct-current power supply in a fault state and gate the direct-current power supply to be in a normal state.
In one embodiment, the power supply further comprises a plurality of isolation devices, and the isolation devices are correspondingly arranged between the direct current power supply and the input end of the power supply selection device.
In one embodiment, the isolation device is a diode, an anode of the diode is connected with the dc power supply, and a cathode of the diode is connected with the input terminal of the power supply selection device.
In one embodiment, the controller is further used for controlling the alarm device to send out the alarm signal when the direct current power supply is detected to be in the fault state.
In one embodiment, the protection circuit further comprises a fuse for connecting the output of the power selection device with the under-voltage protection device.
On the other hand, an embodiment of the present invention provides a dc distribution box, including: a box body; the direct current power supply equipment in any one of the above embodiments is arranged in the box body.
In one embodiment, the static electricity removing device is arranged inside the box body and used for removing static electricity in the box body.
In one embodiment, the static electricity removing device is a static electricity removing ion fan.
In one embodiment, the air exhaust device is arranged inside the box body and used for ventilating the box body.
In one embodiment, the refrigerator further comprises a heat dissipation device, wherein the heat dissipation device is arranged on the outer wall of the refrigerator body and used for reducing the temperature inside the refrigerator body.
Based on any of the above embodiments, the dc power supply device has a plurality of dc power supplies, and the dc power supplies are backup to each other. The power supply selection device can be switched to other direct current power supplies to supply power for the load when the direct current power supply can not provide electric energy under the indication of control, and the power quality of the electric energy provided by the direct current power supply equipment is ensured by arranging the undervoltage protection device, so that the power supply reliability of the direct current power supply equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a DC power supply apparatus according to an embodiment;
FIG. 2 is a schematic structural diagram of a DC power supply apparatus according to another embodiment;
fig. 3 is a schematic diagram of a dc distribution box according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
Spatial relational terms, such as "under," "below," "under," "over," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
As shown in fig. 1, an embodiment of the present invention provides a dc power supply apparatus, which includes a plurality of dc power supplies 10, a power selection device 30, an under-voltage protection device 50, and a controller 90. The plurality of dc power supplies 10 may be a plurality of dc power supplies 10 into which one total dc input is divided, or may be a plurality of dc power supplies 10 independent of each other. The performance parameters of the dc power supply 10, such as voltage, power, etc., may be determined according to actual engineering requirements, for example, according to the rated voltage and rated power of the load 70 supplied by the dc power supply device.
The power selection device 30 includes an input terminal, an output terminal, and a control terminal, the input terminal of the power selection device 30 is connected to each dc power supply 10, the output terminal of the power selection device 30 is connected to the undervoltage protection device 50, and the control terminal of the power selection device 30 is connected to the controller 90. The power selection device 30 is used to switch the dc power supply 10. Specifically, the power selection device 30 may select one dc power source 10 among the plurality of dc power sources 10 to supply power to the load 70 connected to the dc power supply apparatus.
The undervoltage protection device 50 is configured to be connected between the output terminal of the power selection device 30 and the load 70, and to disconnect the output terminal of the power selection device 30 from the load 70 when the output voltage of the output terminal of the power selection device 30 is lower than a preset voltage. Under-voltage refers to a condition where the voltage of the power source is insufficient to maintain the normal operation of the load 70, and many loads 70 may have serious failures or safety accidents after the power source is under-voltage. For example, the rotation speed of the motor is reduced or even locked when the motor is under voltage, so that the current of the motor is rapidly increased under a certain load torque, and the motor may be burnt out. In some embodiments, under-voltage protection device 50 may be implemented by an under-voltage relay having a coil connected in parallel with load 70 to monitor the voltage across load 70, and a normally closed contact connected in series between load 70 and dc power source 10. The normally closed contact of the undervoltage relay is used for being disconnected under the condition that the voltage acquired by the coil of the undervoltage relay is lower than a setting value, and undervoltage protection is achieved on the load 70.
The controller 90 is connected to a control terminal of the power selection device 30, and the controller 90 is used to acquire the state of each dc power supply 10. The state of the dc power supply 10 includes a normal state and a fault state. Optionally, the controller 90 includes a single chip microcomputer, and is connected to the dc power supplies 10 through an IO port of the single chip microcomputer to obtain output voltages of the dc power supplies 10 to determine states of the dc power supplies 10. For example, if the output voltage of the dc power supply 10 is within a preset range, it is determined that the dc power supply 10 is in a normal state, otherwise, it is determined that the dc power supply 10 is in a fault state. The controller 90 is further configured to output a control command to the control terminal of the power selection device 30 if the dc power supply 10 gated by the power selection device 30 is in a fault state. The control command is used to instruct the power supply selection device 30 to cut off the dc power supply 10 in the failed state and to gate the dc power supply 10 to be in the normal state.
The dc power supply apparatus in this embodiment has a plurality of dc power supplies 10, and the dc power supplies 10 are backup to each other. The power selection device 30 can switch to another dc power supply 10 to supply power to the load 70 when the dc power supply 10 cannot provide power under the instruction of control, and the power quality of the power provided by the dc power supply device in this embodiment is ensured by providing the under-voltage protection device 50, thereby improving the power supply reliability of the dc power supply device.
In one embodiment, the power selection device 30 includes a plurality of controllable switches, the controllable switches are in one-to-one correspondence with the dc power supplies 10, the input terminals of the controllable switches are connected to the corresponding dc power supplies 10, the output terminals of the controllable switches are connected to the under-voltage protection device 50, and the control terminals of the controllable switches are connected to the controller 90. The input terminal of the controllable switch and the output terminal of the controllable switch are conducted under the condition that the control terminal of the controllable switch receives the first signal. And under the condition that the control end of the controllable switch receives the second signal, the input end of the controllable switch and the output end of the controllable switch are conducted. The control command sent by the controller 90 includes a first signal and a second signal, and the controller 90 is configured to send the first signal to the control terminal of any one of the dc power supplies 10 in the normal state, and send the second signal to the control terminals of the remaining dc power supplies 10, so that the dc power supply 10 gated by the power selection device 30 is the dc power supply 10 in the normal state. The controlled switch can be a triode, the base electrode of the triode is the control end of the controlled switch, the emitter of the triode is the input end of the controlled switch, and the collector of the triode is the output end of the controlled switch. Or the base electrode of the triode is the control end of the controlled switch, the collector electrode of the triode is the input end of the controlled switch, and the emitter electrode of the triode is the output end of the controlled switch. Similarly, the controlled switch can also be a MOS transistor, an IGBT transistor, or the like.
In one embodiment, as shown in fig. 2, the dc power supply apparatus further includes a plurality of isolation devices, each of which corresponds to one of the dc power supplies 10, and is disposed between the corresponding dc power supply 10 and the input terminal of the power selection device 30. The isolation device is used for electrically isolating the dc power supply 10 and preventing an external circuit of the dc power supply 10 from affecting the performance of the dc power supply 10.
In one embodiment, the isolation device is a diode. The anode of the diode is connected to the dc power supply 10, and the cathode of the diode is connected to the input terminal of the power selection device 30. The diode has unidirectional conductivity, and the dc power supply 10 is electrically isolated by this characteristic of the diode.
In one embodiment, the dc power supply apparatus further comprises an alarm device. The alarm device is used for sending out an alarm signal. The alarm device can be an LED lamp, a buzzer or other audible and visual alarms. The controller 90 is connected to an alarm device, and the controller 90 is further configured to control the alarm device to send an alarm signal when the dc power supply 10 is detected to be in the fault state.
In one embodiment, the dc powered device further comprises a wireless communication means, and the controller 90 is connected to the wireless communication means. The wireless communication device is used for establishing wireless communication connection with an upper computer, and the controller 90 is further used for sending fault information to the upper computer through the wireless communication device when detecting that the direct current power supply 10 is in a fault state. The upper computer can be in wireless communication connection with the plurality of direct current power supply devices, operation and maintenance personnel of the power system need to operate and maintain all direct current power supply devices in a responsible area, fault conditions of the direct current power supply devices can be monitored in real time through the upper computer, faults can be checked and eliminated in time, and stability of the power system is guaranteed. In one embodiment, the wireless communication device may be in wireless communication connection with the host computer through WiFi, a carrier network, a power system private network, and the like.
In one embodiment, the dc supply device further comprises a fuse for connecting the output of the power selection means 30 with the undervoltage protection means 50. It can be understood that when a power supply circuit between the dc power supply device and the load 70, the load 70 itself, or the like fails, an overcurrent may occur, and the fuse may be fused in time when the overcurrent occurs, so as to disconnect the power supply circuit, thereby preventing a more serious accident from occurring.
An embodiment of the present invention further provides a dc distribution box, as shown in fig. 3, the dc distribution box includes a box body and a dc power supply device. The dc power supply equipment is disposed in the box, and the dc power distribution equipment includes a plurality of dc power supplies 10, a power selection device 30, an undervoltage protection device 50, and a controller 90. The plurality of dc power supplies 10 may be a plurality of dc power supplies 10 into which one total dc input is divided, or may be a plurality of dc power supplies 10 independent of each other. The performance parameters of the dc power supply 10, such as voltage, power, etc., may be determined according to actual engineering requirements, for example, according to the rated voltage and rated power of the load 70 supplied by the dc power supply device.
The power selection device 30 includes an input terminal, an output terminal, and a control terminal, the input terminal of the power selection device 30 is connected to each dc power supply 10, the output terminal of the power selection device 30 is connected to the undervoltage protection device 50, and the control terminal of the power selection device 30 is connected to the controller 90. The power selection device 30 is used to switch the dc power supply 10. Specifically, the power selection device 30 may select one dc power source 10 among the plurality of dc power sources 10 to supply power to the load 70 connected to the dc power supply apparatus.
The undervoltage protection device 50 is configured to be connected between the output terminal of the power selection device 30 and the load 70, and to disconnect the output terminal of the power selection device 30 from the load 70 when the output voltage of the output terminal of the power selection device 30 is lower than a preset voltage. Under-voltage refers to a condition where the voltage of the power source is insufficient to maintain the normal operation of the load 70, and many loads 70 may have serious failures or safety accidents after the power source is under-voltage. For example, the rotation speed of the motor is reduced or even locked when the motor is under voltage, so that the current of the motor is rapidly increased under a certain load torque, and the motor may be burnt out. In some embodiments, under-voltage protection device 50 may be implemented by an under-voltage relay having a coil connected in parallel with load 70 to monitor the voltage across load 70, and a normally closed contact connected in series between load 70 and dc power source 10. The normally closed contact of the undervoltage relay is used for being disconnected under the condition that the voltage acquired by the coil of the undervoltage relay is lower than a setting value, and undervoltage protection is achieved on the load 70.
The controller 90 is connected to a control terminal of the power selection device 30, and the controller 90 is used to acquire the state of each dc power supply 10. The state of the dc power supply 10 includes a normal state and a fault state. Optionally, the controller 90 includes a single chip microcomputer, and is connected to the dc power supplies 10 through an IO port of the single chip microcomputer to obtain output voltages of the dc power supplies 10 to determine states of the dc power supplies 10. For example, if the output voltage of the dc power supply 10 is within a preset range, the dc power supply 10 is determined to be in a normal state, otherwise, the dc power supply 10 is determined to be in a fault state. The controller 90 is further configured to output a control command to the control terminal of the power selection device 30 if the dc power supply 10 gated by the power selection device 30 is in a fault state. The control command is used to instruct the power supply selection device 30 to cut off the dc power supply 10 in the failed state and to gate the dc power supply 10 to be in the normal state.
The dc distribution box in this embodiment has a plurality of dc power supplies 10, and the dc power supplies 10 are backup to each other. The power selection device 30 can switch to another dc power supply 10 to supply power to the load 70 when the dc power supply 10 cannot provide power under the instruction of control, and the power quality of the power provided by the dc power supply device in this embodiment is ensured by providing the under-voltage protection device 50, thereby improving the power supply reliability of the dc power supply device.
In one embodiment, the power selection device 30 includes a plurality of controllable switches, the controllable switches are in one-to-one correspondence with the dc power supplies 10, the input terminals of the controllable switches are connected to the corresponding dc power supplies 10, the output terminals of the controllable switches are connected to the under-voltage protection device 50, and the control terminals of the controllable switches are connected to the controller 90. The input terminal of the controllable switch and the output terminal of the controllable switch are conducted under the condition that the control terminal of the controllable switch receives the first signal. And under the condition that the control end of the controllable switch receives the second signal, the input end of the controllable switch and the output end of the controllable switch are conducted. The control command sent by the controller 90 includes a first signal and a second signal, and the controller 90 is configured to send the first signal to the control terminal of any one of the dc power supplies 10 in the normal state, and send the second signal to the control terminals of the remaining dc power supplies 10, so that the dc power supply 10 gated by the power selection device 30 is the dc power supply 10 in the normal state. The controlled switch can be a triode, the base electrode of the triode is the control end of the controlled switch, the emitter of the triode is the input end of the controlled switch, and the collector of the triode is the output end of the controlled switch. Or the base electrode of the triode is the control end of the controlled switch, the collector electrode of the triode is the input end of the controlled switch, and the emitter electrode of the triode is the output end of the controlled switch. Similarly, the controlled switch can also be a MOS transistor, an IGBT transistor, or the like.
In one embodiment, the dc power supply apparatus further includes a plurality of isolation devices, each of which corresponds to one of the dc power supplies 10, and is disposed between the corresponding dc power supply 10 and the input terminal of the power selection device 30. The isolation device is used for electrically isolating the dc power supply 10 and preventing an external circuit of the dc power supply 10 from affecting the performance of the dc power supply 10.
In one embodiment, the isolation device is a diode. The anode of the diode is connected to the dc power supply 10, and the cathode of the diode is connected to the input terminal of the power selection device 30. The diode has unidirectional conductivity, and the dc power supply 10 is electrically isolated by this characteristic of the diode.
In one embodiment, the dc power supply apparatus further comprises an alarm device. The alarm device is used for sending out an alarm signal. The alarm device can be an LED lamp, a buzzer or other audible and visual alarms. The controller 90 is connected to an alarm device, and the controller 90 is further configured to control the alarm device to send an alarm signal when the dc power supply 10 is detected to be in the fault state.
In one embodiment, the dc supply device further comprises a fuse for connecting the output of the power selection means 30 with the undervoltage protection means 50. It can be understood that when a power supply circuit between the dc power supply device and the load 70, the load 70 itself, or the like fails, an overcurrent may occur, and the fuse may be fused in time when the overcurrent occurs, so as to disconnect the power supply circuit, thereby preventing a more serious accident from occurring.
In one embodiment, the dc powered device further comprises a wireless communication means, and the controller 90 is connected to the wireless communication means. The wireless communication device is used for establishing wireless communication connection with an upper computer, and the controller 90 is further used for sending fault information to the upper computer through the wireless communication device when detecting that the direct current power supply 10 is in a fault state. The upper computer can be in wireless communication connection with the plurality of direct current power supply devices, operation and maintenance personnel of the power system need to operate and maintain all direct current power supply devices in a responsible area, fault conditions of the direct current power supply devices can be monitored in real time through the upper computer, faults can be checked and eliminated in time, and stability of the power system is guaranteed. In one embodiment, the wireless communication device may be in wireless communication connection with the host computer through WiFi, a carrier network, a power system private network, and the like.
In one embodiment, the dc distribution box further comprises a static removing device, which is disposed inside the box body and is used for removing static electricity in the box body. Although the static electricity is generally not high, the voltage of the static electricity may reach thousands or even tens of thousands of volts, which threatens the stable operation of the electrical equipment in the dc distribution cabinet, and may cause damage, malfunction, and the like of the electrical equipment. Therefore, the static electricity removing device is provided inside the dc distribution box in this embodiment to remove static electricity inside the dc distribution box.
In one embodiment, the static electricity removing device is a static electricity removing ion fan. The static-removing ion fan generates a large amount of positive and negative ions through corona discharge, so that static charges in the direct-current distribution box are neutralized with the positive and negative ions generated by the static-removing ion fan, and the purpose of removing static electricity is achieved.
In one embodiment, the air exhausting device is arranged inside the box body and used for ventilating the box body.
In one embodiment, the heat dissipation device is arranged on the outer wall of the box body and used for reducing the temperature inside the box body.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A dc power supply apparatus, comprising:
a plurality of DC power supplies;
the power supply selection device comprises an input end, an output end and a control end, wherein the input end of the power supply selection device is connected with each direct-current power supply and used for switching the direct-current power supplies;
the under-voltage protection device is connected between the output end of the power supply selection device and a load, and the output end of the power supply selection device is disconnected with the load when the output voltage of the output end of the power supply selection device is lower than a preset voltage;
the controller is connected with the control end of the power supply selection device and used for acquiring the state of each direct current power supply; if the direct-current power supply gated by the power supply selection device is in a fault state, outputting a control command to a control end of the power supply selection device; the control command is used for instructing the power selection device to cut off the direct-current power supply in a fault state and gate the direct-current power supply to be in a normal state.
2. The dc power supply apparatus according to claim 1, further comprising a plurality of isolation devices, the isolation devices being respectively disposed between the dc power supply and the input terminal of the power supply selection device.
3. The dc power supply apparatus according to claim 2, wherein the isolation device is a diode, an anode of the diode is connected to the dc power supply, and a cathode of the diode is connected to the input terminal of the power selection device.
4. The dc power supply apparatus according to claim 1, further comprising an alarm device, wherein the alarm device is configured to send an alarm signal, the controller is connected to the alarm device, and the controller is further configured to control the alarm device to send the alarm signal when the dc power supply is detected to be in the fault state.
5. The dc power supply apparatus of claim 1, further comprising a fuse for connecting an output of the power selection device with the undervoltage protection device.
6. A DC distribution box, characterized by, includes:
a box body;
the direct current supply apparatus according to any one of claims 1 to 5, provided in the case.
7. The dc electrical box of claim 6, further comprising a static discharge device disposed inside the box for discharging static electricity inside the box.
8. The dc distribution box of claim 7, wherein the static discharge device is a static discharge ion blower.
9. The dc electrical box of claim 6, further comprising an air exhaust device disposed within the box for ventilating the box.
10. The dc distribution box of claim 6, further comprising a heat sink disposed on an outer wall of the box for reducing a temperature inside the box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216424.8A CN113937748A (en) | 2021-10-19 | 2021-10-19 | Direct current power supply equipment and direct current distribution box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216424.8A CN113937748A (en) | 2021-10-19 | 2021-10-19 | Direct current power supply equipment and direct current distribution box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113937748A true CN113937748A (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111216424.8A Pending CN113937748A (en) | 2021-10-19 | 2021-10-19 | Direct current power supply equipment and direct current distribution box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113937748A (en) |
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2021
- 2021-10-19 CN CN202111216424.8A patent/CN113937748A/en active Pending
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