Power device

Abstract

A power device comprises a buzzer, a control unit and a driving circuit. The control unit records a plurality of PWM frequencies corresponding to a plurality of pitches, and is used for generating a PWM signal according to a prompt tone corresponding to a judgment result, and changing the frequency of the PWM signal according to at least two pitches of the prompt tone. And the driving circuit is used for driving the buzzer to give out the warning tone according to the PWM signal.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to an electric power device. Background Art

[0002] Uninterruptible power supply (UPS) is used to provide backup power to necessary equipment (such as computers, servers or medical equipment) when AC mains fails, so that these devices can still operate normally under this situation. Therefore, it is very important to allow users to obtain the current status and behavior of the UPS in real time so that users can take corresponding measures to ensure the normal operation of the UPS. Utility Model Content

[0003] One of the purposes of the present invention is to provide an electric device, which allows a user to obtain the current status and behavior of the electric device in real time.

[0004] To achieve the above-mentioned purpose, the utility model provides an electric device, which includes a buzzer, a control unit and a driving circuit. The control unit records a plurality of PWM frequencies corresponding to a plurality of pitches, and is used to generate a PWM signal according to a prompt sound corresponding to a judgment result, and to change the frequency of the PWM signal according to at least two pitches of the prompt sound. As for the driving circuit, it is used to drive the buzzer to emit the prompt sound according to the PWM signal.

[0005] In an embodiment of the present invention, the power device is a non-stop power supply system.

[0006] In another embodiment of the present invention, the power device is a power distribution unit.

[0007] In yet another embodiment of the present invention, the power device is an automatic power switch.

[0008] In order to make the above-mentioned objectives, technical features and benefits after actual implementation more obvious and understandable, a more detailed description will be given below with the help of preferred implementation examples and corresponding related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0010] Figure 1 An electric device according to an embodiment of the present invention is shown.

[0011] Figure 2 One implementation of the driving circuit is shown.

[0012] Figure 3 Used to describe one of the prompt tones.

[0013] Figure 4 Used to describe another type of reminder tone.

[0014] Figure 5 The illustrated process is used to illustrate one of the prompt tone application methods of the power device 100 .

[0015] Figure 6 The process shown is used to illustrate another prompt sound application method of the power device 100 .

[0016] Figure 7 The process shown is used to illustrate another application method of the prompt sound of the power device 100 .

[0017] Figure 8 Used to illustrate another reminder tone.

[0018] Fig. 9 An electric device according to another embodiment of the present invention is shown.

[0019] Fig.10 An electric device according to yet another embodiment of the present invention is shown.

[0020] Fig.11 An electric device according to yet another embodiment of the present invention is shown.

[0021] Fig.12 An electric device according to yet another embodiment of the present invention is shown.

[0022] Fig.13 An electric device according to yet another embodiment of the present invention is shown.

[0023] Fig.14 An electric device according to yet another embodiment of the present invention is shown.

[0024] Fig.15 It is a main block diagram of the power device of the utility model. DETAILED DESCRIPTION

[0025] In order to more clearly understand the features, contents and advantages of the present invention and the effects that can be achieved, the present invention is hereby described in detail in the form of embodiments in conjunction with the accompanying drawings. The drawings used therein are only for illustration and auxiliary description purposes and may not be the actual proportions and precise configurations after the implementation of the present invention. Therefore, the proportions and configuration relationships of the attached drawings should not be interpreted to limit the scope of rights of the present invention in actual implementation.

[0026] The advantages, features and technical methods achieved by the present invention will be described in more detail with reference to the exemplary embodiments and the accompanying drawings so as to be easier to understand, and the present invention may be implemented in different forms, so it should not be understood to be limited to the embodiments described herein. On the contrary, for those with ordinary knowledge in the relevant technical field, the provided embodiments will make the disclosure more thorough and comprehensive and completely convey the scope of the present invention, and the present invention will only be defined by the scope of the attached patent application.

[0027] Figure 1 An electric device according to an embodiment of the present invention is shown. Figure 1 As shown, the power device 100 is an uninterruptible power system. Figure 1 As can be seen from the circuit structure shown, the power device 100 is an off-line UPS. The power device 100 includes a filter unit 114, a switch unit 116, a DC-AC conversion circuit 104, a switch unit 118, a filter unit 120, a charging circuit 102, a battery 106, a sensing circuit 112, a control unit 110, a driving circuit 170, a buzzer 190, a communication interface 192, a user interface 194 and a bypass path 124.

[0028] The switch unit 116 is electrically coupled to one end of the bypass path 124 and is electrically coupled to an AC power source (e.g., a mains power source) through the filter unit 114. The switch unit 118 is electrically coupled to the other end of the bypass path 124 and is electrically coupled to an output end 122 of the uninterruptible power supply system through the filter unit 120. The charging circuit 102 is electrically coupled to the battery 106 and is electrically coupled to an AC power source through the filter unit 114. The DC-AC conversion circuit 104 is electrically coupled between the battery 106 and the switch unit 118. In addition, the driving circuit 170 is electrically coupled to the buzzer 190, and the switch unit 116, the switch unit 118, the charging circuit 102, the DC-AC conversion circuit 104, the communication interface 192, the user interface 194, and the driving circuit 170 are all electrically coupled to the control unit 110 to be controlled by the control unit 110. For example, the control unit 110 may control the operation of the switch unit 118 to determine whether to electrically couple the output terminal of the DC-AC conversion circuit 104 to the filter unit 120 or to electrically couple the bypass path 124 to the filter unit 120 .

[0029] In this example, the sensing circuit 112 is also electrically coupled to the aforementioned AC power source, the output terminal 122 of the UPS, and the input terminal of the DC-AC conversion circuit 104 (as shown by coupling points A, B, and C, respectively) to obtain the sensing result, and transmit the sensing result to the control unit 110 so that the control unit 110 can judge the current state of the UPS. In addition, the control unit 110 records a plurality of PWM (pulse width modulation) frequencies corresponding to a plurality of pitches, and is used to generate a PWM signal (described later) according to a prompt tone corresponding to a judgment result, and change the frequency of the PWM signal according to at least two pitches of the aforementioned prompt tone. As for the driving circuit 170, it is used to drive the buzzer 190 to emit a prompt tone according to the PWM signal.

[0030] Figure 2 One of the implementation methods of the driving circuit is shown in FIG. Figure 2 In this example, the driving circuit 170 includes a diode 171, an NPN bipolar junction transistor (NPN BJT) 173, resistors 172 and 174. The NPN bipolar junction transistor 173 has a base, a collector and an emitter. One end of the resistor 172 is electrically coupled to the control unit 110 to receive the PWM signal, and the other end is electrically coupled to the aforementioned base. The resistor 174 is electrically coupled between the reference potential VSS and the aforementioned emitter. The anode of the diode 171 is electrically coupled to the aforementioned collector and one of the pins of the buzzer 190, and the cathode is electrically coupled to the operating voltage VDD and the other pin of the buzzer 190. Of course, Figure 2 The circuit structure of the driving circuit 170 shown is only used as an example and is not used to limit the present invention. A person skilled in the art should know that the driving circuit 170 may also be implemented by using other circuit structures.

[0031] Figure 3 Used to describe one of the prompt tones. Figure 3As shown, the level of the PWM signal varies between 0V and Va, and the duty cycle is maintained at 50%. When the frequency of the PWM signal is 956μs (microseconds), the buzzer 190 will emit a sound with a pitch of Do; when the frequency of the PWM signal is 758μs, the buzzer 190 will emit a sound with a pitch of Mi; and when the frequency of the PWM signal is 637μs, the buzzer 190 will emit a sound with a pitch of So. Since the frequency of the PWM signal changes to 956μs, 758μs, and 637μs in sequence, the buzzer will emit prompt sounds with pitches of Do, Mi, and So in sequence. Figure 4 Used to describe another type of prompt tone. Figure 4 As shown, the frequency of the PWM signal changes to 637 μs, 758 μs and 956 μs in sequence, so the buzzer 190 will emit prompt tones with pitches of So, Mi and Do in sequence.

[0032] Depend on Figure 3 and Figure 4 As can be seen from the description, different prompt sounds can be used to indicate different states of the UPS, and can also be used to indicate different behaviors of the UPS. Therefore, the user can obtain and identify the current state of the UPS in real time according to the prompt sound emitted by the buzzer 190, or obtain and identify the current behavior of the UPS in real time according to the prompt sound emitted by the buzzer 190.

[0033] In addition, despite Figure 3 and Figure 4 The two prompt sounds described both have three pitches of Do, Mi and So, but this is only used as an example and is not intended to limit the present invention. In other words, which pitches are included in each prompt sound, the order of the pitches in each prompt sound, the duration of each pitch, and the number of times each pitch appears can all be changed according to actual design requirements. For example, the prompt sound can be designed to have a pitch combination of Mi, Fa and Sol in sequence, or a pitch combination of Fa, Mi, Fa and La in sequence, or a pitch combination of La and Si in sequence. Through the above description, those with ordinary knowledge in this field should know that as long as the prompt sound has at least two pitches, it is the scope of protection of the present invention. In addition, the volume of each pitch can also be changed according to actual design requirements, as long as the level Va is changed. The higher the level Va, the louder the sound emitted by the buzzer 190.

[0034] In addition, it is conceivable that if there are multiple UPSs in the same field, the user only needs to set different prompt sounds for these UPSs according to the same state or the same behavior, so that the user can clearly identify which UPS issued the prompt sound and judge the state or behavior of the UPS based on the prompt sound heard.

[0035] Figure 5 The process shown is used to illustrate one of the prompt sound application methods of the power device 100. Figure 5 and Figure 1 First, the control unit 110 determines whether the power button of the UPS is pressed (as shown in step S502). In step S502, when the judgment is no, the control unit 110 returns to step S502; when the judgment is yes, the control unit 110 determines whether the UPS is in the power-on state (as shown in step S504). When the judgment result of step S504 shows that the UPS is in the power-on state, the control unit 110 changes the frequency of the PWM signal according to the pitch change of the shutdown prompt sound, thereby causing the buzzer 190 to emit a shutdown prompt sound (as shown in step S506), for example, Figure 3 Then, the control unit 110 shuts down the UPS (as shown in step S508).

[0036] On the contrary, when the determination result of step S504 shows that the UPS is not in the power-on state, the control unit 110 changes the frequency of the PWM signal according to the pitch change of the power-on prompt tone, thereby causing the buzzer 190 to emit a power-on prompt tone (as shown in step S510). Of course, the power-on prompt tone is different from the power-off prompt tone. Figure 4 Then, the control unit 110 turns on the UPS (as shown in step S512).

[0037] Figure 6 The process shown is used to illustrate another application method of the prompt sound of the power device 100. Figure 6 and Figure 1First, the control unit 110 determines whether the uninterruptible power supply system is in battery mode (as shown in step S602). In step S602, when the judgment is no, the control unit 110 returns to step S602; when the judgment is yes, the control unit 110 determines whether the battery 106 of the uninterruptible power supply system is in low voltage according to the sensing result provided by the sensing circuit 112 (as shown in step S604). When the judgment result of step S604 shows that the battery 106 of the uninterruptible power supply system is in low voltage, the control unit 110 changes the frequency of the PWM signal according to the pitch change of the low battery voltage prompt sound, thereby causing the buzzer 190 to emit a low battery voltage prompt sound (as shown in step S606), for example, Figure 3 The prompt tone is emitted, or a third prompt tone is emitted.

[0038] On the contrary, when the determination result of step S604 shows that the battery 106 of the uninterruptible power supply system is not at a low voltage, the control unit 110 changes the frequency of the PWM signal according to the pitch change of the battery mode prompt tone, thereby causing the buzzer 190 to emit a battery mode prompt tone (as shown in step S608), for example, Figure 4 The prompt tone described above may be a fourth prompt tone. In short, the prompt tone corresponding to when the battery 106 is at a low voltage should be different from the prompt tone corresponding to when the battery 106 is not at a low voltage.

[0039] Figure 7 The process shown is used to illustrate another application method of the prompt sound of the power device 100. Figure 7 and Figure 6 , compared to Figure 6 , Figure 7 The process shown has an additional step of counting with a first counter and adding 1 to the count value (as shown in step S706), a step of determining whether the count value is greater than or equal to a first default value (as shown in step S708), a step of resetting the first counter (as shown in step S712), a step of counting with a second counter and adding 1 to the count value (as shown in step S714), a step of determining whether the count value is greater than or equal to a second default value (as shown in step S716), and a step of resetting the second counter (as shown in step S720). The first default value is, for example, 10 seconds, and the second default value is, for example, 30 seconds. In this way, when the determination result of step S704 is that the battery 106 presents a low voltage, the buzzer 190 can emit a low battery voltage reminder tone every 10 seconds. Similarly, when the determination result of step S704 is that the battery 106 does not present a low voltage, the buzzer 190 can emit a battery mode reminder tone every 30 seconds. In addition, although in this example, the first default value is 10 seconds and the second default value is 30 seconds, this is only used as an example and is not intended to limit the present invention.

[0040] Figure 8 To illustrate another type of prompt tone. Figure 8 As shown, the level of this PWM signal varies between 0V and Va. In addition, when the frequency of this PWM signal is 956μs (microseconds), the buzzer 190 will emit a sound with a pitch of Do; and when the frequency of this PWM signal is 758μs, the buzzer 190 will emit a sound with a pitch of Mi. However, in particular, when the buzzer 190 emits the pitch Do, the control unit 110 gradually reduces the duty cycle of the PWM signal from 50% to 0% to change the tone of the pitch Do. Similarly, when the buzzer 190 emits the pitch Mi, the control unit 110 gradually reduces the duty cycle of the PWM signal from 50% to 0% to change the tone of the pitch Mi. Of course, the control unit 110 can also change the tone of any pitch by gradually increasing the duty cycle of the PWM signal.

[0041] From the above description, it can be known that the control unit 110 can change the timbre of at least one pitch by gradually changing the duty cycle of the PWM signal corresponding to at least one pitch. This means that the timbre of each pitch can also be changed according to actual design requirements.

[0042] Please refer to Figure 1 In this example, the control unit 110 is further connected to a network through the communication interface 192, and the control unit 110 is further used to provide a network user interface. This network user interface is used for the user to set the corresponding prompt tone under different judgment results, and to set which pitches are included in each prompt tone, the order of these pitches, the timbre of each pitch, the duration of each pitch, and the volume of each pitch. In addition, in this example, the user interface 194 is also used for the user to set the corresponding prompt tone under different judgment results, and to set which pitches are included in each prompt tone, the order of these pitches, the timbre of each pitch, the duration of each pitch, and the volume of each pitch. In this example, the user interface 194 includes a touch display panel.

[0043] In addition, although in this example, the sensing circuit 112 is electrically coupled to the AC power supply, the output terminal 122 of the uninterruptible power supply system, and the input terminal of the DC-AC conversion circuit 104, this is not intended to limit the present invention. A person with ordinary knowledge in the art should know that the sensing circuit 112 can also be electrically coupled to the AC power supply, the output terminal 122 of the uninterruptible power supply system, and at least one of the input terminals of the DC-AC conversion circuit 104. It is worth mentioning that although in this example, the uninterruptible power supply system has a filter unit 114, a filter unit 120, a battery 106, a communication interface 192, and a user interface 194, this is not intended to limit the present invention. A person with ordinary knowledge in the art should know that these five components can be used according to actual design requirements. For example, the uninterruptible power supply system may not have a battery 106 inside, but instead adopt an external battery 106.

[0044] Based on the above teachings, those skilled in the art should know that the concept of the above prompt tone can also be applied to other uninterruptible power supply systems of different structures. Of course, the concept of the above prompt tone can also be applied to other different types of power devices, such as power distribution units (PDU) and automatic transfer switches (ATS). Please see the following description.

[0045] Fig. 9 FIG. 2 shows an electric device according to another embodiment of the present invention. Fig. 9 As shown, the power device 200 is an uninterruptible power system. Fig. 9 As can be seen from the circuit structure shown, the power device 200 is an offline uninterruptible power system. Figure 1 The offline uninterruptible power supply system shown in the figure is Fig. 9 The difference of the offline uninterruptible power supply system shown is that it further includes a DC-DC conversion circuit 108. The DC-DC conversion circuit 108 is electrically coupled between the battery 106 and the input terminal of the DC-AC conversion circuit 104, and is electrically coupled to the control unit 110 to be controlled by the control unit 110.

[0046] Fig.10 FIG. 2 shows an electric device according to another embodiment of the present invention. Fig.10 As shown, the power device 300 is an uninterruptible power system. Fig.10 As can be seen from the circuit structure shown, the power device 300 is a line-interactive UPS. Figure 1 The offline uninterruptible power supply system shown in the figure is Fig.10The difference of the illustrated online interactive uninterruptible power supply system is that it further includes an automatic voltage regulation circuit (AVR circuit) 126. The automatic voltage regulation circuit 126 is disposed on the bypass path 124 and is electrically coupled to the control unit 110 to be controlled by the control unit 110.

[0047] Fig.11 FIG. 2 shows an electric device according to another embodiment of the present invention. Fig.11 As shown, the power device 400 is an uninterruptible power system. Fig.11 As can be seen from the circuit structure shown, the power device 400 is an online interactive uninterruptible power system. Fig.10 The online interactive uninterruptible power supply system shown in Fig.11 The difference of the online interactive uninterruptible power supply system shown is that it further includes a DC-DC conversion circuit 108. The DC-DC conversion circuit 108 is electrically coupled between the battery 106 and the input terminal of the DC-AC conversion circuit 104, and is electrically coupled to the control unit 110 to be controlled by the control unit 110.

[0048] Fig.12 FIG. 2 shows an electric device according to another embodiment of the present invention. Fig.12 As shown, the power device 500 is an uninterruptible power system. Fig.12 As can be seen from the circuit structure shown, the power device 500 is an online uninterruptible power supply system (On-line UPS). Fig. 9 The offline uninterruptible power supply system shown in the figure is Fig.12 The difference of the online uninterruptible power supply system shown is that it further includes a power factor correction circuit (PFC circuit) 128. The power factor correction circuit 128 is electrically coupled between the switch unit 116 and the input end of the DC-AC conversion circuit 104, and is electrically coupled to the control unit 110 to be controlled by the control unit 110. In addition, in this example, the control unit 110 can control the operation of the switch unit 116 to determine whether to electrically couple the filter unit 114 to the bypass path 124 or to electrically couple the filter unit 114 to the input end of the power factor correction circuit 128.

[0049] Fig.13 FIG. 2 shows an electric device according to another embodiment of the present invention. Fig.13As shown, the power device 600 is a power distribution unit. The power device 600 includes two conductors (as shown by the label 602), a plurality of switch units (as shown by the label 604), a plurality of sensor units (as shown by the label 606), a plurality of sockets (as shown by the label 608), an AC-DC conversion circuit 610, a control unit 612, a user interface 620, a communication interface 622, a driving circuit 624 and a buzzer 626. Fig.13 As shown, the two conductors 602 are respectively coupled to the live wire (labeled as L) and the neutral wire (labeled as N) of the AC power source. Each switch unit 604 is electrically coupled to one of the two conductors 602. Each sensing unit 606 is electrically coupled to one of the switch units 604. Each socket 608 is electrically coupled to one of the sensing units 606 and electrically coupled to the other of the two conductors 602. The AC-DC conversion circuit 610 is electrically coupled to the two conductors and supplies the working voltage to the control unit 612.

[0050] In addition, the switch units 604, the user interface 620, the communication interface 622 and the driving circuit 624 are all electrically coupled to the control unit 612 to accept the control of the control unit 612. The labels C1~CN are control signals for controlling the switch units 604, respectively, where N is a natural number. In addition, the sensing units 606 are also electrically coupled to the control unit 612 to provide sensing signals D1~DN to the control unit respectively. In this example, the control unit 612 will also provide a PWM signal to the driving circuit 624. Therefore, the buzzer 626 can allow the user to obtain and identify the current status and behavior of the power distribution unit in real time by emitting different prompt sounds. For example, the buzzer 626 can indicate whether the power distribution unit is in the on state or the off state by emitting different prompt sounds. Since the functions and operations of the control unit 612, the driving circuit 624 and the buzzer 626 can refer to Figure 1 The functions and operations of the control unit 110, the driving circuit 170 and the buzzer 190 are not further described here.

[0051] In addition, in this example, the control unit 612 is further connected to a network through the communication interface 622, and the control unit 612 is further used to provide a network user interface. This network user interface is used for the user to set the corresponding prompt tone under different judgment results, and to set which pitches, the order of these pitches, the timbre of each pitch, the time length of each pitch and the volume size of each pitch in each prompt tone. In addition, in this example, the user interface 620 is also used for the user to set the corresponding prompt tone under different judgment results, and to set which pitches, the order of these pitches, the timbre of each pitch, the time length of each pitch and the volume size of each pitch in each prompt tone. In this example, the user interface 620 includes a touch display panel.

[0052] Fig.14 FIG. 2 shows an electric device according to another embodiment of the present invention. Fig.14 As shown, the power device 700 is an automatic power switch. Fig.13 The power distribution unit shown, Fig.14 The difference of the automatic power switch shown is that it further includes an automatic switch 630. In addition to electrically coupling the two conductors 602, the automatic switch 630 is also electrically coupled to two AC power sources. The live wire and the neutral wire of one AC power source are marked with L1 and N1 respectively, and the live wire and the neutral wire of the other AC power source are marked with L2 and N2 respectively. In addition, the control unit 612 also controls the operation of the automatic switch 630 with a control signal CK, so as to control the automatic switch 630 to select one of the AC power sources to be electrically coupled to the two conductors 602.

[0053] According to the description of the above embodiments, the main block diagram of the power device of the present invention can be summarized as follows: Fig.15 Please refer to Fig.15 The power device 1000 mainly includes a control unit 110, a driving circuit 170 and a buzzer 190, wherein the driving circuit 170 can be implemented by a diode 171, an NPN bipolar junction transistor 173, and resistors 172 and 174. In summary, since the control unit 110 can change the frequency and duty cycle of the PWM signal, the buzzer 190 can further emit prompt sounds with different pitches and different timbres.

[0054] The embodiments described above are only for illustrating the technical ideas and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the patent scope of the utility model. That is, all equivalent changes or modifications made according to the spirit disclosed by the utility model should still be included in the patent scope of the utility model.

Claims

1. An electric power device, characterized in that: The electric device comprises: A buzzer; A control unit records a plurality of PWM frequencies corresponding to a plurality of pitches, and is used to generate a PWM signal according to a prompt sound corresponding to a judgment result, and to change the frequency of the PWM signal according to at least two pitches of the prompt sound; and A driving circuit is used to drive the buzzer to emit the prompt tone according to the PWM signal.

2. The electric power device according to claim 1, characterized in that: When the buzzer emits the prompt tone, the control unit gradually changes the duty cycle of the PWM signal corresponding to at least one tone pitch, thereby changing the timbre of the at least one tone pitch.

3. The electric power device according to claim 2, characterized in that: The control unit gradually reduces the duty cycle of the PWM signal corresponding to the at least one pitch.

4. The electric power device according to claim 1, characterized in that: The driving circuit includes: An NPN bipolar junction transistor having a base, a collector and an emitter; a first resistor, one end of which is electrically coupled to the control unit to receive the PWM signal, and the other end of which is electrically coupled to the base; a second resistor electrically coupled between a reference potential and the emitter; and A diode has an anode electrically coupled to the collector and one of the pins of the buzzer, and a cathode electrically coupled to a working voltage and the other pin of the buzzer.

5. The electric power device according to claim 1, characterized in that: The power device is an uninterruptible power system, and the power device further comprises: A first switch unit electrically coupled to an AC power source and one end of a bypass path; A second switch unit electrically coupling an output terminal of the uninterruptible power supply system and the other end of the bypass path; a charging circuit electrically coupling the AC power source and a battery; A DC-AC conversion circuit is electrically coupled between the battery and the second switch unit. The first switch unit, the second switch unit, the charging circuit and the DC-AC conversion circuit are all electrically coupled to the control unit to be controlled by the control unit.

6. The electric power device according to claim 5, characterized in that: The judgment result shows whether the uninterruptible power supply system is in the power-on state, and the prompt tone corresponding to the uninterruptible power supply system being in the power-on state is different from the prompt tone corresponding to the uninterruptible power supply system being in the power-off state.

7. The electric power device according to claim 5, characterized in that: The power device further includes a sensing circuit, which is electrically coupled to the control unit to be controlled by the control unit. The sensing circuit is also electrically coupled to at least one of the AC power source, the output end and the input end of the DC-AC conversion circuit to obtain a sensing result.

8. The electric power device according to claim 7, characterized in that: The sensing circuit is at least electrically coupled to the input end of the DC-AC conversion circuit, and the control unit obtains the judgment result based on the sensing result, and the judgment result shows whether the battery of the uninterruptible power supply system is at a low voltage, and the corresponding prompt sound when the battery is at a low voltage is different from the corresponding prompt sound when the battery is not at a low voltage.

9. The electric power device according to claim 5, characterized in that: The control unit is further used to provide a network user interface, which is used for a user to set the corresponding prompt tone under different judgment results, and to set which pitches each prompt tone has, the order of the pitches, the timbre of each pitch, the duration of each pitch and the volume of each pitch.

10. The electric power device according to claim 5, characterized in that: The power device further has a user interface, which is electrically coupled to the control unit. The user interface is used for a user to set the prompt tone corresponding to different judgment results, and to set which pitches are included in each prompt tone, the order of the pitches, the timbre of each pitch, the duration of each pitch and the volume of each pitch.

11. The electric power device according to claim 10, characterized in that: The user interface includes a touch display panel.

12. The electric power device according to claim 5, characterized in that: The power device further includes a DC-DC conversion circuit electrically coupled between the battery and an input terminal of the DC-AC conversion circuit.

13. The electric power device according to claim 12, characterized in that: The power device further includes a power factor correction circuit electrically coupled between the first switch unit and an input end of the DC-AC conversion circuit.

14. The electric power device according to claim 5, characterized in that: The power device further includes an automatic voltage regulating circuit, which is disposed on the bypass path.

15. The electric power device according to claim 1, characterized in that: The power device is a power distribution unit, and the power device further comprises: Two conductors; A plurality of switch units, each switch unit being electrically coupled to one of the two conductors; A plurality of sensing units, each sensing unit being electrically coupled to one of the switch units; A plurality of sockets, each socket being electrically coupled to one of the sensing units and electrically coupled to the other of the two conductors; and an AC-DC conversion circuit electrically coupling the two conductors, The switch units, the sensing units and the AC-DC conversion circuit are all electrically coupled to the control unit.

16. The electric power device according to claim 15, characterized in that: The judgment result indicates whether the power distribution unit is in a power-on state, and the prompt tone corresponding to the power distribution unit being in a power-on state is different from the prompt tone corresponding to the power distribution unit being in a power-off state.

17. The electric power device according to claim 15, characterized in that: The control unit is further used to provide a network user interface, which is used for a user to set the corresponding prompt tone under different judgment results, and to set which pitches each prompt tone has, the order of the pitches, the timbre of each pitch, the duration of each pitch and the volume of each pitch.

18. The electric power device according to claim 15, characterized in that: The power device further has a user interface, which is electrically coupled to the control unit. The user interface is used for a user to set the prompt tone corresponding to different judgment results, and to set which pitches are included in each prompt tone, the order of the pitches, the timbre of each pitch, the duration of each pitch and the volume of each pitch.

19. The electric power device according to claim 18, characterized in that The user interface includes a touch display panel.

20. The electric power device according to claim 1, characterized in that The power device is an automatic power switch, and the power device further comprises:

1. Automatic switch; Two conductors, one end of each conductor is electrically coupled to the automatic switch; A plurality of switch units, each switch unit being electrically coupled to one of the two conductors; A plurality of sensing units, each sensing unit being electrically coupled to one of the switch units; A plurality of sockets, each socket being electrically coupled to one of the sensing units and electrically coupled to the other of the two conductors; and an AC-DC conversion circuit electrically coupled to the automatic switch, The automatic switch, the switch units, the sensing units and the AC-DC conversion circuit are all electrically coupled to the control unit.

21. The electric power device according to claim 20, characterized in that: The judgment result shows whether the automatic power switch is in the on state, and the prompt tone corresponding to the automatic power switch being in the on state is different from the prompt tone corresponding to the automatic power switch being in the off state.

22. The electric power device according to claim 20, characterized in that The control unit is further used to provide a network user interface, which is used for a user to set the corresponding prompt tone under different judgment results, and to set which pitches each prompt tone has, the order of the pitches, the timbre of each pitch, the duration of each pitch and the volume of each pitch.

23. The electric power device according to claim 20, characterized in that The power device further has a user interface, which is electrically coupled to the control unit. The user interface is used for a user to set the prompt tone corresponding to different judgment results, and to set which pitches are included in each prompt tone, the order of the pitches, the timbre of each pitch, the duration of each pitch and the volume of each pitch.

24. The electric power device according to claim 23, characterized in that The user interface includes a touch display panel.

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