TW201501434A - Power socket apparatus and method for detecting and indicating load current thereof - Google Patents

Abstract

A power socket apparatus, comprising: a plurality of power sockets, coupled to a power supply system; and a LED circuit, coupled to the plurality of power sockets and comprising: a current detector, detecting a loop current of the power socket apparatus; a comparator, comparing the loop current with a rated current of the power socket apparatus and outputting a comparison result; and a LED, configured on the power socket apparatus and emitting light according to the comparison result.

Description

Power socket device and load current detection and representation method thereof

The present invention is directed to an electrical outlet device that includes a plurality of electrical outlets.

With the popularization of various electric appliances and the diversification of electrical functions, there are more and more cases of using several high-power appliances at the same time. Therefore, prevention of power overload is an important issue. In terms of protection against power overload, some technologies focus on the overload protection of each appliance itself to prevent the appliance itself from being damaged by overload, such as the power control device shown in the Republic of China Patent No. 590277 (Application No. 092205373). Adjust the operating clock of the notebook to avoid overload by detecting the instantaneous power consumption of the notebook and comparing the instantaneous power consumption with the maximum power that the AC/DC converter can provide. On the other hand, the switchboard and the distribution box are usually equipped with an overcurrent protection device to automatically cut off the power supply when an overcurrent occurs due to an overload or a short circuit in the power supply system.

However, in connection with the power socket device of the power supply network, such as a wall socket or an extension cord, it is often the case that the user inserts too many high-power appliances into the same power socket without knowing the power of each appliance. On the device, causing a power jump. Therefore, there is a need for an instant power outlet device that alerts the user to maintain user safety.

In view of the above, the present invention provides a power socket device and a load current detecting and indicating method thereof, which can understand the load current state of the power socket device by detecting the loop current and comparing the loop current with the rated current of the power socket device, and The light emitting diode represents the load current state.

An embodiment of the present invention provides a power socket device, including: a plurality of power sockets coupled to a power supply system; and a first LED circuit coupled to the power sockets, including: a first current Detecting, detecting a first loop current of the power socket device; a first comparator comparing the first loop current with a rated current of the power socket device, and outputting a first comparison result; and a first light emitting diode The body is disposed on the power socket device and emits light according to the first comparison result.

Another embodiment of the present invention provides a load current detecting and indicating method for a power socket device, which is applicable to a power socket device including a plurality of power sockets, the power sockets being coupled to a power supply system, the power socket device The load current detection and representation method includes: detecting a first loop current of the power socket device; comparing the first loop current with a rated current of the power socket device, and outputting a first comparison result; and configuring the power socket A first light emitting diode on the device emits light according to the first comparison result.

10, 90‧‧‧Power outlet device

20, 30, 40‧‧‧ electrical appliances

70‧‧‧Power outlet device circuit

80‧‧‧Load current detection and representation method for power outlet devices

100‧‧‧ switch

111, 112, 113, 114, 115, 116‧‧‧ power outlets

120, 121, 122, 123, 124, 125, 126‧‧‧Lighting diodes

130,161‧‧‧Lighting diode circuit

131‧‧‧current detector

132‧‧‧ Analog to Digital Converter

133‧‧‧ comparator

134‧‧‧Digital to analog converter

200‧‧‧AC power supply

300‧‧‧load

C‧‧‧Neutral

L1, L2‧‧‧ FireWire

S10, S20, S30, ..., S70‧‧ steps

1 is a schematic diagram of a power outlet device in accordance with an embodiment of the present invention.

2 to 4 are views showing a power outlet device in use according to an embodiment of the present invention.

Fig. 5 is a view showing the internal structure of a power socket device according to an embodiment of the present invention.

Figure 6 is a schematic diagram of a light emitting diode circuit in accordance with an embodiment of the present invention.

Figure 7 is a circuit diagram of a power outlet device in accordance with an embodiment of the present invention.

FIG. 8 is a flow chart showing a method of detecting and representing load current of a power outlet device according to an embodiment of the invention.

Figure 9 is a schematic illustration of a power outlet device in accordance with another embodiment of the present invention.

Figure 10 is a block diagram showing the internal structure of a power socket device according to another embodiment of the present invention.

The following description is an embodiment of the present invention. The intent is to exemplify the general principles of the invention and should not be construed as limiting the scope of the invention, which is defined by the scope of the claims. In addition, the following description may repeat reference numerals and/or letters in different examples. This repetition is for the sake of brevity and is not intended to specify a relationship between the different embodiments and/or the configurations discussed.

1 is a schematic diagram of a power outlet device 10 in accordance with an embodiment of the present invention. The power socket device 10, for example, a wall socket or an extension cable, includes a plurality of power sockets 111-116 and a light emitting diode (LED) 120. The light emitting diode 120 is disposed on the power socket device 10. For example, at least a portion of the light emitting diode 120 is exposed so that the user can see the light. The light emitting diode 120 is inserted into the negative according to the power socket device 10 The comparison of the loop current after the load (electrical appliance) and the rated current of the power outlet device 10 emits light of different colors.

In the following description, assuming that the rated power of the power outlet device 10 is 2,500 watts, the rated current I0 of the power outlet device 10 is 2,500/220 amps, which is about 11.40 amps. If no electric appliance is inserted into the power outlet device 10, the loop current I of the power outlet device 10 is 0 amps, and the light-emitting diode 120 does not emit light. If the loop current I is not 0 and less than I1, the LED 120 emits green light, indicating that the load current condition is normal, and the power outlet device 10 operates normally. If the loop current I is not less than I1 and less than I2, the light-emitting diode 120 emits yellow light, indicating that the load current is large, and it is not suitable to insert a high-power electric appliance. If the loop current I is not less than I2, the LED 201 emits a red light warning, indicating that the power outlet device 10 is close to the overcurrent, it is not appropriate to insert the electrical device, and even a relatively high power appliance needs to be pulled out. In the present embodiment, I1 is 85% of the rated current I0, about 9.7 amps, and I2 is 95% of the rated current I0, about 10.8 amps. It should be noted that the color light type of the above-mentioned light-emitting diode 120 and the number and percentage of I1 and I2 are merely exemplary and are not intended to limit the present invention.

Hereinafter, the state in which the power outlet device 10 is in use will be described by taking the second to fourth embodiments as an example. As shown in Fig. 2, when an electric appliance 20 with a power of 60 watts, such as a notebook computer, is plugged into the power outlet 111, the loop current I=60/220 ≒0.27 amps, less than I1, the light-emitting diode 120 emits green light. As shown in Fig. 3, when there is another electric appliance 30 with a power of 2200 watts, such as an induction cooker, when the power socket 112 is plugged in, the loop current I=(60+2200)/220≒10.27 amps is greater than I1 and less than I2, so the light emitting diode 120 emits yellow light. As shown in Fig. 4, when there is another appliance 40 having a power of 150 watts, such as a television set, when plugged into the power outlet 113, this The time loop current I=(60+2200+150)/220≒10.95 amps is greater than I2, so the light-emitting diode 120 emits a red light warning to approach the overcurrent.

Fig. 5 is a view showing the internal structure of a power outlet device 10 according to an embodiment of the present invention. The power outlet device 10 includes live wires L1 and L2, a neutral line C, an LED circuit 130, and a switch 100. The live lines L1 and L2 and the neutral line C are respectively coupled to the second live line and the neutral line of an external power supply system (for example, a power line network). The live wires L1 and L2 and the neutral wire C are also coupled to the jacks of the power outlets 111-116 of the power outlet device 10. For the sake of simplicity of the illustration, FIG. 5 only shows the connection relationship between the jack of the power socket 111 and the live wires L1 and L2 and the neutral line C. The remaining power sockets 112-116 are similar to the power socket 111. The LED circuit 130 and the switch 100 are coupled to one of the fire lines L1.

Figure 6 is a schematic illustration of an LED circuit 130 in accordance with an embodiment of the present invention. The LED circuit 130 includes a current detector 131, an analog to digital (A/D) converter 132, a comparator 133, a digital to analog (D/A) converter 134, and a configuration. LED 120 on power outlet device 10. The current detector 131 detects the loop current I of the power outlet device 10 and outputs the loop current I to the A/D converter 132. The A/D converter 132 performs A/D conversion on the loop current I to convert the loop current I into a detected value, and outputs the detected value to the comparator 133. The comparator 133 stores the values A1 and A2, where A1 is the value obtained by A/D conversion of the current I1, and A2 is the value obtained by A/D conversion of the current I2. The comparator 133 compares the detected values with A1 and A2 to compare the magnitudes of the loop currents I and I1 and I2, and outputs the comparison result to the D/A converter 134. If the detected value is not 0 and is smaller than A1, the comparator 133 outputs the detected value to the D/A converter 134. If the detected value is not less than A1 and less than A2, then the ratio The comparator 133 outputs an A1 to D/A converter 134. If the detected value is not less than A2, the comparator 133 outputs the A2 to D/A converter 134. The D/A converter 134 performs D/A conversion on the comparison result, and converts the comparison result into a corresponding voltage signal, and applies the voltage signal to the two end electrodes of the LED 120, so that the LED 120 is different according to the voltage magnitude of the voltage signal. And emit different shades of light.

Fig. 7 is a circuit diagram of the power outlet device 10. As shown in FIG. 7, all of the appliances plugged into the power outlet device 10 are represented by an equivalent load 300, and the power source is represented by an AC power source 200. When the switch 100 is turned on, the current detector 131 detects the loop current I of the power outlet device 10, and then the other components of the LED circuit 130 perform subsequent conversion and comparison operations, as described above.

FIG. 8 is a flow chart showing a load current detection and representation method 80 of the power outlet device 10 in accordance with an embodiment of the present invention. In step S10, the load (electrical appliance) is plugged into the power outlet device 10. In step S20, the loop current I of the power outlet device 10 is detected, for example, by the current detector 131 detecting the loop current I. In step S30, it is compared whether the loop current I is smaller than the current I1. For example, the loop current I is first A/D converted by the A/D converter 132 to convert the loop current I into a detected value, and then compared and detected by the comparator 133. The value is the value A1 stored in the comparator 133, wherein the value A1 is obtained by A/D conversion of the current I1. If the loop current I is smaller than the current I1, the LED emits green light as shown in step S50. If the loop current I is not less than the current 11, the loop current I is compared to the current I2 as shown in step S40. For example, the comparator 133 compares the detected value with the value A2 stored in the comparator 133, where the value A2 is the current I2. Obtained by A/D conversion. If the loop current I is less than the current I2, the LED emits yellow light as shown in step S60. If the loop current I is not less than the current I2, the LED emits red light as shown in step S70.

Figure 9 is a schematic illustration of a power outlet assembly 90 in accordance with another embodiment of the present invention. The difference between the power outlet device 90 and the power outlet device 10 is that the power socket device 90 further includes LEDs 121-126, and the LEDs 121-126 are disposed on the power socket device 90 so as to surround the power sockets 111-116, respectively. The LEDs 121 to 126 are respectively used to indicate the load current state of each of the power outlets 111 to 116, that is, the LEDs 121 to 126 are respectively used to indicate the relationship between the loop current and the rated current of each of the power outlets 111 to 116. For example, assume that the power outlet device 90 has the same power rating as the power outlet device 10, and the LED 120 has the same illumination principle as the LED 120 of FIG. When the electric appliance 20 with a power of 60 watts is plugged into the power socket 111, the loop current I of the power socket device 90 is about 0.27 amps, and less than I1, the light emitting diode 120 emits green light, and the loop current of the power socket 111. I11=60/220≒0.27 ampere, less than I1, the light-emitting diode 121 emits green light. When the electric appliance 30 with a power of 2200 watts is plugged into the power outlet 112 in addition to the electric appliance 20, the loop current of the power outlet device 90 is I=(60+2200)/220≒10.27 amps, which is greater than I1 and less than I2. Therefore, the light emitting diode 120 emits yellow light, and the loop current I12 of the power socket 112 is 2200/220=10 amps, which is larger than I1 and smaller than I2, so the light emitting diode 122 emits yellow light. When the electric appliance 40 with a power of 150 watts is plugged into the power outlet 113 in addition to the electric appliances 20 and 30, the loop current I of the power outlet device 90 is (= 60 + 2200 + 150) / 220 ≒ 10.95 amps, which is greater than I2. Therefore, the light-emitting diode 120 emits red light, and the loop current I13 of the power socket 113 is 150/220 ≒ 0.68 amps, which is less than I1, and the light-emitting diode 123 emits green light. Therefore, when the electric appliances 20, 30, and 40 are simultaneously plugged into the power socket device 90, the light emitting diode 120 emits red light, the light emitting diode 121 emits green light, and the light emitting diode 122 emits yellow light, and the light emitting diode 123 Green light, so It can be known from the yellow light of the LED 220 that the electric appliance 30 on the power socket 112 is a high-power electric appliance, and the user can preferentially unplug the electric appliance 30 to avoid over-current of the power socket device 90.

Fig. 10 is a view showing the internal structure of a power outlet device 90 according to another embodiment of the present invention. Fig. 10 is similar to Fig. 5 except that the LED circuit 161 is added between the jack of the power outlet 111 and the live line L1. For the sake of simplicity of the illustration, FIG. 5 shows only the power outlet 111 and the LED circuit 161, and the rest of the power outlets 112-116 are identical to the power outlet 111. The LED circuit 161 is similar to the LED circuit 130 and includes a current detector that detects the loop current of the power outlet 111, an A/D converter, a comparator, a D/A converter, and an LED 121. The operation of the LED circuit 161 is similar to that of the LED circuit 130 and therefore will not be described again.

The above is an overview feature of the embodiment. Those having ordinary skill in the art should be able to use the present invention as a basis for design or adaptation to achieve the same objectives and/or achieve the same advantages of the embodiments described herein. It should be understood by those of ordinary skill in the art that the same configuration should not depart from the spirit and scope of the present invention, and various changes, substitutions and substitutions can be made without departing from the spirit and scope of the present invention. The illustrative methods are merely illustrative of the steps, but are not necessarily performed in the order indicated, and may be added, substituted, changed, and/or eliminated, adjusted as appropriate, and disclosed. The spirit and scope of the examples are consistent.

10‧‧‧Power outlet device

111, 112, 113, 114, 115, 116‧‧‧ power outlets

120‧‧‧Lighting diode

Claims (10)

A power socket device includes: a plurality of power sockets coupled to a power supply system; and a first LED circuit coupled to the power sockets, including: a first current detector for detecting the power a first loop current of the socket device; a first comparator comparing the first loop current with a rated current of the power outlet device and outputting a first comparison result; and a first light emitting diode disposed on the power source On the socket device, light is emitted according to the first comparison result. The power socket device of claim 1, wherein: when the first loop current is not zero and less than a first percentage of the rated current, the first light emitting diode emits a first a color light; when the first loop current is not less than the first percentage of the rated current and less than a second percentage of the rated current, the first light emitting diode emits a second color light; When the first loop current is not less than the second percentage of the rated current, the first LED emits a third color light; wherein the first percentage is less than the second percentage. The power socket device of claim 2, wherein the LED circuit further comprises: an analog to digital converter coupled between the first current detector and the first comparator, The first loop current is converted into a first detected value; and a digit to analog converter is coupled to the first comparator and the first light emitting Converting the first comparison result into a first voltage signal, so that the first light emitting diode emits light according to the first voltage signal; wherein the first comparator further stores the current corresponding to the rated current a first value of the first percentage and a second value corresponding to the second percentage of the rated current, the first comparator comparing the detected value with the first value and the second value, And outputting the first comparison result. The power socket device of claim 3, further comprising: a plurality of second light emitting diode circuits, each of the second light emitting diode circuits being coupled to a corresponding one of the power sockets The socket, each of the second LED circuits includes: a second power socket current detector for detecting a second loop current of the power socket; and a second comparator for comparing the second loop current with the rated current And outputting a second comparison result; and a second light emitting diode disposed on the power socket device to emit light according to the second comparison result. The power socket device of claim 4, wherein the second light emitting diode is configured to surround the power socket. A load current detecting and indicating method for a power socket device is applicable to a power socket device including a plurality of power sockets, the power sockets being coupled to a power supply system, and the load current detecting and representing method of the power socket device The method includes: detecting a first loop current of the power socket device; comparing the first loop current with a rated current of the power socket device, and losing A first comparison result is obtained; and a first light emitting diode disposed on the power socket device emits light according to the first comparison result. The load current detecting and indicating method of the power socket device of claim 6, further comprising: when the first loop current is not zero and less than a first percentage of the rated current, The first light emitting diode emits a first color light; when the first circuit current is not less than the first percentage of the rated current and less than a second percentage of the rated current, the first light is caused The diode emits a second color light; and when the first circuit current is not less than the second percentage of the rated current, causing the first light emitting diode to emit a third color light; wherein the first color The ratio is less than the second percentage. The load current detecting and indicating method of the power socket device of claim 7, further comprising: converting the first loop current into a first detected value; comparing the detected value with the corresponding rated current a first value of the first percentage and a second value corresponding to the second percentage of the rated current, and outputting the first comparison result; and converting the first comparison result into a first The voltage signal causes the first light emitting diode to emit light according to the first voltage signal. The method for detecting and representing the load current of the power socket device according to claim 8 further includes: detecting a second loop current of each of the power outlets; Comparing the second loop current with the rated current, and outputting a second comparison result; and causing a second light emitting diode of each of the power outlets to emit light according to the second comparison result. The load current detecting and indicating method of the power socket device of claim 8, wherein the second light emitting diode of each of the power sockets is configured to surround each of the power sockets.