JP2022060083A - Electric outlet - Google Patents

Abstract

To provide an electric outlet which can improve the detection accuracy of an abnormal temperature rise thereof.SOLUTION: An electric outlet 1 includes a load terminal 3, a power terminal 4, a feed line L1, a plurality of temperature detector units 9 and a detection unit 101. A load appliance 2 is electrically connected to the load terminal 3, and an external power supply 5 is connected to the power terminal 4. The feed line L1 is an electric path which electrically connects between the power terminal 4 and the load terminal 3. The plurality of temperature detector units 9 detects the information of a plurality of temperatures corresponding to at least one of the load terminal 3 the power terminal 4 and the feed line L1. The detection unit 101 detects whether or not an abnormality exists based on differences among the information of the plurality of temperatures respectively detected by the plurality of temperature detector units 9.SELECTED DRAWING: Figure 1

Description

The present disclosure generally relates to an outlet, and more particularly to an outlet that detects temperature information in the main body of the outlet.

The wiring device (outlet) described in Patent Document 1 includes a device main body, a temperature detection unit, and a control unit. The temperature detection unit detects the temperature corresponding to the power supply path in the main body of the appliance. Further, the control unit makes a determination based on the temperature detected by the temperature detection unit, and depending on the result of the determination, cuts off the power supply path and performs at least one of notifications regarding the temperature.

Japanese Unexamined Patent Publication No. 2020-081998

In the case of a control method for determining the presence or absence of an abnormal temperature rise based on the temperature of the outlet as in the outlet of Patent Document 1, the outlet is not a temperature rise due to a change in the state of the outlet, for example, an outlet due to a change in the external environmental temperature. There is a possibility that the temperature rise of the above will also be judged as abnormal. Therefore, the detection accuracy of the temperature rise may decrease.

The present disclosure has been made in view of the above reasons, and an object of the present invention is to provide an outlet capable of improving the detection accuracy of temperature rise.

The outlet according to one aspect of the present disclosure includes a load terminal, a power supply terminal, a power supply path, a plurality of temperature detection units, and a detection unit. A load device is connected to the load terminal, and an external power source is connected to the power supply terminal. The power supply path connects between the load terminal and the power supply terminal. The plurality of temperature detection units detect a plurality of temperature information corresponding to at least one of the load terminal, the power supply terminal, and the power supply path. Further, the detection unit detects whether or not there is an abnormality based on the difference between the plurality of temperature information detected by each of the plurality of temperature detection units.

In the present disclosure, the accuracy of detecting a temperature rise can be improved.

FIG. 1 is a block diagram showing a configuration of an outlet according to an embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the same outlet. FIG. 3 shows an example of using the same outlet, and is an external perspective view when the opening / closing portion is in a conductive state. FIG. 4 shows an example of using the same outlet, and is an external perspective view when the opening / closing portion is in a shut-off state. FIG. 5 is a front view of the same outlet with the outer cover and the inner cover removed. FIG. 6 is a rear view of the same outlet with the outer cover and the inner cover removed. FIG. 7 is a schematic view corresponding to the X1-X1 line cross section of FIG. 5 showing the configuration of the main part of the outlet as above. FIG. 8 is a schematic view corresponding to the X2-X2 line cross section of FIG. 6 showing the configuration of the main part of the same outlet. FIG. 9 is a schematic view corresponding to the Z1-Z1 line cross section of FIG. 5 showing the configuration of the main part of the outlet as described above. FIG. 10 is a schematic view corresponding to the Z2-Z2 line cross section of FIG. 5 showing the configuration of the main part of the outlet as above. FIG. 11 is a circuit diagram showing the configuration of the power supply circuit of the same outlet. FIG. 12 is a flowchart for explaining the detection mode 1 in the same outlet. FIG. 13 is a flowchart for explaining the detection mode 2 in the same outlet. FIG. 14 is a graph for explaining the detection mode 2 in the same outlet. FIG. 15 is a graph for explaining the detection mode 2 in the same outlet. FIG. 16 is a flowchart for explaining the detection mode 3 in the same outlet. FIG. 17 is a graph for explaining the detection mode 3 in the same outlet. FIG. 18 is a flowchart for explaining the detection mode 4 in the same outlet. FIG. 19 is a graph for explaining the detection mode 4 in the same outlet. FIG. 20 is a graph for explaining the detection mode 4 in the same outlet.

The embodiments and modifications described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiments and modifications. Even if it is not the embodiment and the modification, various changes can be made according to the design and the like as long as it does not deviate from the technical idea of the present disclosure.

(1) Outline First, an outline of the outlet 1 of the present embodiment will be described with reference to FIGS. 1, 2, and 8.

In the present embodiment, the outlet 1 includes a load terminal 3, a power supply terminal 4, a power supply path L1, a plurality of temperature detection units 9, and a detection unit 101. The load device 2 is electrically connected to the load terminal 3, the external power supply 5 is connected to the power supply terminal 4, and the power supply path L1 is an electric line that electrically connects the load terminal 3 and the power supply terminal 4. .. The plurality of temperature detection units 9 detect a plurality of temperature information corresponding to at least one of the load terminal 3, the power supply terminal 4, and the power supply path L1. The detection unit 101 detects whether or not there is an abnormality based on the difference between the plurality of temperature information detected by each of the plurality of temperature detection units 9. Here, the "temperature information" includes the temperature in each temperature detection unit 9, the amount of temperature change per unit time, and the like. Further, the "plurality of temperature information corresponding to at least one of the load terminal 3, the power supply terminal 4, and the power supply path L1" may be the temperature information of at least one of the load terminal 3, the power supply terminal 4, and the power supply path L1. Alternatively, the temperature may be the temperature of the load terminal 3, the power supply terminal 4, and at least one of the feeding paths L1 and the portion where heat is transferred (including the air layer) by heat conduction.

Further, in the present embodiment, the outlet 1 has a plurality of load terminals 3, and includes a plurality of load terminal temperature detection units 92 that detect temperature information corresponding to each load terminal 3. Although it is shown in FIG. 1 that the power supply terminal temperature detection unit 91 and the load terminal temperature detection unit 92, which will be described later, are one by one, a plurality of power supply terminals correspond to the plurality of power supply terminals 4. A temperature detection unit 91 is provided, and a plurality of load terminal temperature detection units 92 are provided corresponding to the plurality of load terminals 3. Further, the outlet 1 has a plurality of power supply terminals 4, and includes a plurality of power supply terminal temperature detection units 91 that detect temperature information corresponding to each power supply terminal 4. That is, the plurality of temperature detection units 9 include a plurality of load terminal temperature detection units 92 and a plurality of power supply terminal temperature detection units 91. Further, the outlet 1 includes the power supply circuit 22, and the temperature detection unit 9 operates by the voltage supplied from the external power supply 5 via the power supply circuit 22. The power supply circuit 22 includes a dropper circuit 221, a current limiting circuit 222, and a constant voltage circuit 223.

By the way, according to the configuration of the present embodiment, the detection unit 101 detects whether or not the state of the outlet 1 is abnormal based on the difference between the plurality of temperature information detected by the plurality of temperature detection units 9, respectively. 1 It is possible to improve the detection accuracy of an abnormal temperature rise inside.

(2) Details Hereinafter, the outlet 1 according to the present embodiment will be described in more detail with reference to FIGS. 1 to 20.

(2.1) Overall Configuration In the present embodiment, the outlet 1 supplies electric power from the external power supply 5 connected to the power supply terminal 4 to the load appliance 2 connected to the load terminal 3 through the power supply path L1. The outlet 1 is installed in, for example, a residential facility such as a detached house or an apartment house, or a non-residential facility such as an office, a store, a school, or a long-term care facility. The outlet 1 is installed, for example, on a construction surface 11 (see FIG. 3) such as a wall surface, a ceiling surface, and a floor surface of a facility (building). The outlet 1 is not limited to the one installed on the construction surface 11, and may be attached to a fixture such as a desk, or may be used while being placed on a mounting surface (for example, a floor surface). ..

In the present embodiment, as shown in FIGS. 1 and 3, the outlet 1 includes a housing 1B, and the housing 1B holds a load terminal 3 and a power supply terminal 4. Further, the outlet 1 includes a power supply path L1, a plurality of temperature detection units 9, a detection unit 101, a control unit 102, an output unit M1, an opening / closing unit 12, and a switch 16. When the detection unit 101 detects an abnormality, the control unit 102 issues a command to shut off the power supply path L1 to the opening / closing unit 12. Further, the control unit 102 notifies the detection result of the detection unit 101. Here, the control unit 102, together with the detection unit 101, constitutes the processing unit 10. The output unit M1 outputs a notification from the control unit 102 regarding the detection result of the detection unit 101 to the outside. That is, the output unit M1 outputs the detection result of the detection unit 101 to the outside. Here, the output unit M1 has, for example, a display unit 14 that notifies the notification regarding the detection result of the detection unit 101 from the control unit 102 by light emission, and a buzzer 15 that notifies by voice. When the detection unit 101 detects an abnormality, the opening / closing unit 12 receives a command from the control unit 102 to shut off the power supply path L1. That is, when the detection unit 101 detects an abnormality, the opening / closing unit 12 shuts off the power supply path L1. Further, the operating member 13 is mechanically coupled to the opening / closing portion 12. The switch 16 is provided to issue a command to the control unit 102 from the outside.

3 and 4 are perspective views in a state where the outlet 1 is attached to the construction surface 11. In the present embodiment, the outlet 1 is an embedded outlet that is attached to the mounting frame of a large-angle continuous outlet standardized by the Japanese Industrial Standards. Specifically, the outlet 1 is attached to the construction surface 11 via the attachment frame. Here, the mounting frame is fixed to the construction surface 11 via or directly to the embedded box. That is, by fixing the mounting frame to the construction surface 11, the outlet 1 is attached to the construction surface 11 via the mounting frame. A decorative plate 111 is attached to the mounting frame, and as shown in FIGS. 3 and 4, the front surface 1C of the outlet 1 is exposed from the opening window 112 on the front surface of the decorative plate 111. Here, the mounting frame may be a separate member from the outlet 1, or may be a single member. In the present embodiment, the case where the outlet 1 is for indoor use, that is, the case where the construction surface 11 is the inner wall surface of the building (facility) will be described, but the present invention is not limited to this example, and the outlet 1 may be for outdoor use. ..

In the following, the direction perpendicular to the horizontal plane is defined as the "vertical direction" when the outlet 1 is attached to the inner wall surface of the building which is the construction surface 11, and the outlet 1 is viewed downward (vertically) when viewed from the front. Described as "downward". Further, the direction orthogonal to the vertical direction and parallel to the construction surface 11 is referred to as "left-right direction", and the right side of the outlet 1 as viewed from the front is referred to as "right side" and the left side is referred to as "left side". Further, a direction orthogonal to both the vertical direction and the horizontal direction, that is, a direction orthogonal to the construction surface 11 will be referred to as a "front-back direction", and the back side (wall back side) of the construction surface 11 will be described as "rear". However, these directions do not mean to limit the direction in which the outlet 1 is used. For example, when the outlet 1 is mounted on the floor instead of the wall surface, the "front-back direction" is the direction perpendicular to the horizontal plane, and the above-mentioned "vertical direction" and "horizontal direction" are the directions parallel to the horizontal plane. .. Further, even when the outlet 1 is mounted on the wall surface, the outlet 1 may be mounted on the wall surface in a direction in which the above-mentioned "vertical direction" is parallel to the horizontal plane (that is, sideways). In this case, the above-mentioned "" The "left-right direction" is the direction perpendicular to the horizontal plane. It should be noted that the term "vertical" in the present disclosure includes not only perfect verticality but also substantial verticality within a certain error range. Further, "parallel" in the present disclosure includes not only perfect parallelism but also substantially parallelism within a certain error range.

In this embodiment, a one-port type outlet 1 to which one plug 21 (see FIG. 7) can be connected is illustrated. That is, the outlet 1 has one connection port 17 so as to correspond to the plug blade 211 of one plug 21. One connection port 17 is arranged on the front surface 1C of the outlet 1. In the present embodiment, the plug 21 is a plug with a two-pole ground provided with two plug blades 211 and one ground pin 212, and the connection port 17 has two plug blade insertion holes 171 and one ground pin insertion hole. Has 172.

In the present embodiment, the outlet 1 includes a pair of power supply terminals 4 having different polarities and a ground terminal 7 so as to correspond to the plug 21 which is a plug with a two-pole ground. That is, the feeder line 51 on the L pole (Live) side from the external power supply 5 is connected to one of the power supply terminals 4 of the pair of power supply terminals 4, and the N pole (N pole) from the external power supply 5 is connected to the other power supply terminal 4. The feeder line 51 on the Neutral) side is connected. A ground wire 78 is connected to the ground terminal 7. Further, the outlet 1 includes a pair of load terminals 3 having different polarities from each other and a ground pin terminal 19. Further, the load terminal 3 and the power supply terminal 4 having the same polarity are electrically connected to each other by the feeding path L1 via the opening / closing portion 12. Further, the ground terminal 7 and the ground pin terminal 19 are electrically connected to each other via a conductive member 77.

As shown in FIGS. 2 and 8, the outlet 1 has an internal component such as a power supply terminal 4 and a load terminal 3, and a housing 1B for holding the internal component. The housing 1B has an outer body 181, an outer cover 182, an inner cover 183, an inner block 184, and a terminal block 185. Here, the outer body 181 and the outer cover 182, the inner cover 183, the inner block 184, and the terminal block 185 are made of an insulating material such as synthetic resin.

The outer body 181 is formed in a box shape with an open front surface. The opening surface (front surface) of the outer body 181 has a rectangular shape in which the vertical dimension is longer than the horizontal dimension. The inner block 184 is housed in the outer body 181 together with other internal parts (power supply terminal 4, opening / closing portion 12, etc.) while holding the load terminal 3 and the ground pin terminal 19. An inner cover 183 is attached to the front surface of the outer body 181. As a result, between the outer body 181 and the inner cover 183, internal parts including the load terminal 3 and the ground pin terminal 19 held by the inner block 184 are accommodated. The outer cover 182 is attached to the front surface of the inner cover 183. As a result, the load terminal 3 and the ground pin terminal 19 are accommodated between the inner block 184 and the outer cover 182. Here, in the portion of the inner cover 183 corresponding to the inner block 184, an opening window 183A penetrating in the front-rear direction is formed. Therefore, the front surface of the inner block 184 holding the load terminal 3 and the ground pin terminal 19 is covered with the outer cover 182, and when the outer cover 182 is removed, the front surface of the inner block 184 is exposed forward through the opening window 183A. do. The terminal block 185 is housed in the outer body 181 together with other internal components while holding the power supply terminal 4 and the ground terminal 7.

Further, in the present embodiment, the outer cover 182 is configured to be separable into a plurality of members (for example, three members of the first portion 182A, the second portion 182B, and the ground lid 182C).

The above-mentioned one connection port 17 is formed in the first portion 182A of the outer cover 182 that covers the inner block 184. The connection port 17 has a pair of plug blade insertion holes 171 and a ground pin insertion hole 172 into which the ground pin 212 of a plug with a ground electrode is inserted, and a ground lid 182C is provided below the ground pin insertion hole 172. Inside the housing 1B, the load terminal 3 is arranged at a position corresponding to each of the pair of plug blade insertion holes 171 and the earth pin terminal 19 is arranged at a position corresponding to the earth pin insertion hole 172, corresponding to the earth lid 182C. A ground terminal 7 is arranged at the position. Here, the ground pin terminal 19 and the ground terminal 7 are electrically connected. The earth pin terminal 19 is a spring member to which the ground pin 212 of the plug 21 is connected. The ground terminal 7 includes a first ground terminal 71 to which the ground wire 78 of the load device 2 is connected on the side facing the ground lid 182C, and the ground wire 78 of the external power supply is connected to the opposite side of the first ground terminal 71. A second ground terminal 72 is provided.

Further, in the space between the outer body 181 and the inner cover 183, the opening / closing portion 12, the substrate 20, and the like are housed on the left side of the inner block 184. The substrate 20 is arranged above the opening / closing portion 12. A first indicator lamp 141 and a second indicator lamp 142, and a switch 16 constituting the display unit 14 are mounted on the substrate 20. As an example, the first indicator lamp 141 and the second indicator lamp 142 are LEDs (Light Emitting Diodes) having different emission colors from each other, and the switch 16 is a push button switch. Further, a translucent portion 183C and a cantilever 183D are formed on the inner cover 183 so that the light of the display unit 14 can be visually recognized from the front of the outlet 1 and the switch 16 can be pressed from the front of the outlet 1. ing. That is, the light of the display unit 14 can be visually recognized from the front of the outlet 1 through the translucent unit 183C, and the switch 16 can be pushed and operated from the front of the outlet 1 via the cantilever 183D. In FIGS. 3 and 4, for convenience, the reference numerals of the display unit 14 and the switch 16 are shown at positions corresponding to the display unit 14 (first indicator lamp 141 and the second indicator lamp 142) and the switch 16 on the front surface 1C of the outlet 1. Is attached.

(2.2) Load Terminal and Power Supply Terminal In the present embodiment, the pair (two) load terminals 3 included in the outlet 1 are held in the inner block 184 as shown in FIGS. 5 and 7. Further, the ground pin terminal 19 is also held in the inner block 184. Here, the pair of load terminals 3 are arranged at positions corresponding to the pair of plug blade insertion holes 171 formed in the outer cover 182. The earth pin terminal 19 is arranged at a position corresponding to the ground pin insertion hole 172 formed in the outer cover 182.

The load terminal 3 is a blade receiving member into which the plug blade 211 of the plug 21 is inserted when the plug 21 is connected. Further, the ground pin terminal 19 is a spring member into which the ground pin 212 of the plug 21 is inserted. The load terminal 3 and the ground pin terminal 19 are made of a metal having conductivity and elasticity, for example, copper or a copper alloy. The load terminal 3 is electrically connected to the plug blade 211 and mechanically holds the plug blade 211. The earth pin terminal 19 is electrically connected to the ground pin 212 and mechanically holds the ground pin 212.

The pair of power supply terminals 4 are held in the terminal block 185 as shown in FIGS. 6, 8 and 9. Further, the ground terminal 7 is also held in the terminal block 185. Here, the pair of power supply terminals 4 are arranged at positions corresponding to the pair of power supply terminal holes 185A formed on the rear surface of the terminal block 185. The ground terminal 7 is integrally formed with the ground pin terminal 19. The ground terminal 7 is arranged at a position corresponding to the ground terminal hole 185B formed on the rear surface of the terminal block 185. Each power supply terminal 4 is a plug-in type quick connection terminal to which the power supply line 51 is connected by inserting the core wire 52 of the power supply line 51. Specifically, each power supply terminal 4 has a terminal plate 41 and a lock spring 42, as shown in FIG. The terminal board 41 is made of a conductive metal, for example, copper or a copper alloy. The lock spring 42 is made of an elastic metal such as stainless steel. Each power supply terminal 4 is exposed from the corresponding power supply terminal hole 185A in the pair of power supply terminal holes 185A. In each power supply terminal 4, when the power supply line 51 is inserted into the corresponding power supply terminal hole 185A, the power supply line is sandwiched between the terminal plate 41 and the lock spring 42 with the core wire 52 of the power supply line 51. It is electrically connected to the 51 and mechanically holds the feeder line 51. Further, each power supply terminal 4 is mounted on one surface (for example, the rear surface 62) of the board 6 on the front side of the outlet 1 of the terminal board 41. Here, each power supply terminal 4 and the substrate 6 are thermally coupled.

As shown in FIGS. 5, 5 and 9, the ground terminal 7 has a first ground terminal 71 to which the ground wire 78 of the load device 2 is connected and a second ground to which the ground wire 78 of the external power supply 5 is connected. A terminal 72 is provided. The first ground terminal 71 and the second ground terminal 72 include a common pedestal member 73. The first ground terminal 71 includes a holding member 74 and a screw 75 for fixing the ground wire 78 of the load device 2 to the pedestal member 73, and the second ground terminal 72 includes a lock spring 76 held by the pedestal member 73. .. The pedestal member 73 is made of a conductive metal, for example, copper or a copper alloy. The lock spring 76 is made of an elastic metal such as stainless steel. The second ground terminal 72 is a plug-in type quick-connect terminal similar to the power supply terminal 4, and is arranged at a position corresponding to the ground terminal hole 185B formed on the rear surface of the terminal block 185. Here, the first ground terminal 71, the second ground terminal 72, and the ground pin terminal 19 are electrically connected. Here, the pedestal member 73 may be provided as a separate member at the first ground terminal 71 and the second ground terminal 72.

(2.3) Detection system In this embodiment, the temperature detection unit 9, the processing unit 10 (detection unit 101 and control unit 102), and the opening / closing unit 12 constitute the detection system S1 (see FIG. 1). Hereinafter, the detection system S1 will be described in detail.

(2.3.1) Temperature Detection Unit First, the temperature detection unit 9 of the detection system S1 will be described with reference to FIGS. 1, 2, 5, 8, and 10.

In the present embodiment, the temperature detection unit 9 detects the temperature information corresponding to the power supply terminal 4 and the temperature information corresponding to the load terminal 3, respectively. The temperature detection unit 9 is not limited to the one that detects the temperature information corresponding to the power supply terminal 4 and the temperature information corresponding to the load terminal 3, and is among the power supply terminal 4, the load terminal 3, and the power supply path L1. It suffices to detect at least one temperature information.

In the present embodiment, the temperature detection unit 9 detects the power supply terminal temperature detection unit 91 (hereinafter referred to as the first temperature detection unit) that detects the temperature information corresponding to the power supply terminal 4, and the temperature information corresponding to the load terminal 3. A load terminal temperature detecting unit 92 (hereinafter referred to as a second temperature detecting unit) is provided. The first temperature detection unit 91 includes a first temperature sensor 93, and the second temperature detection unit 92 includes a second temperature sensor 94. The first temperature sensor 93 is thermally coupled to the power supply terminal 4. The second temperature sensor 94 is thermally coupled to the load terminal 3. The first temperature sensor 93 and the second temperature sensor 94 are realized by, for example, a thermistor, a thermocouple, a thermopile, or the like.

In the present embodiment, the first temperature sensor 93 of the first temperature detection unit 91 is mounted on the rear surface 62 of the substrate 6 as shown in FIG. That is, the temperature detection unit 9 includes the temperature sensor 97 (first temperature sensor 93) mounted on the substrate 6. Here, a heat transfer member 95 having thermal conductivity and insulating properties is arranged between the terminal plate 41 of the power supply terminal 4 also mounted on the rear surface 62 of the substrate 6 and the first temperature sensor 93. As a result, the first temperature sensor 93 and the power supply terminal 4 are thermally more strongly coupled. The heat transfer member 95 is not an essential configuration for the outlet 1, and can be omitted as appropriate. Here, a pair of first temperature sensors 93 included in the first temperature detection unit 91 are provided corresponding to a pair of power supply terminals 4 having different polarities from each other. Each first temperature sensor 93 detects the temperature information corresponding to the corresponding power supply terminal 4 via the heat transfer member 95. In other words, in the present embodiment, the outlet 1 has a plurality of (pair) power supply terminals 4, and the plurality of temperature detection units 9 have a plurality of (pair) number of power supply terminals 4 for detecting temperature information corresponding to the plurality of power supply terminals 4. 1 Includes a temperature detection unit 91. Further, as shown in FIG. 10, in the present embodiment, the plurality (pair) of power supply terminals 4 are arranged symmetrically with respect to the reference plane AA1, and the plurality of (pair) first temperature detection units corresponding to each are arranged. 91 is also arranged symmetrically with respect to the reference plane AA1. The reference surface AA1 is a surface facing the pair of power supply terminals 4 in the direction in which the pair of power supply terminals 4 are arranged, and passes through the midpoint of the distance between the pair of power supply terminals 4.

As shown in FIG. 7, the load terminal 3 has a holding portion 96 having a C-shaped side view, and the holding portion 96 holds the block-shaped second temperature sensor 94. It is fixed in the state. As a result, thermal coupling between the second temperature sensor 94 and the load terminal 3 is realized. Here, a pair of second temperature sensors 94 included in the second temperature detection unit 92 are provided corresponding to a pair of load terminals 3 having different polarities from each other. Each second temperature sensor 94 detects the temperature information corresponding to the corresponding load terminal 3. In other words, in the present embodiment, the outlet 1 has a plurality of (pair) load terminals 3, and the plurality of temperature detection units 9 have a plurality of (pair) first units for detecting temperature information corresponding to the plurality of load terminals 3. 2 Includes a temperature detection unit 92. Further, as shown in FIG. 5, in the present embodiment, the plurality (pair) of load terminals 3 are arranged symmetrically with respect to the reference plane AA2, and the plurality of (pair) second temperature detection units corresponding to each are arranged. 92 is also arranged symmetrically with respect to the reference plane AA2. The reference surface AA2 is a surface facing the pair of load terminals 3 in the direction in which the pair of load terminals 3 are lined up, and passes through the midpoint of the distance between the pair of load terminals 3.

The temperature detection unit 9 outputs a detection signal corresponding to the detected temperature information to the detection unit 101. The detection signal may be an electric signal that conveys temperature information, and is, for example, a signal such as a resistance value, a voltage value, or a current value that changes according to the temperature information.

In the present embodiment, the outlet 1 includes the power supply circuit 22, and the temperature detection unit 9 operates by the voltage supplied from the external power supply 5 via the power supply circuit 22. The power supply circuit 22 is mounted on the control board 23 held in the housing 1B, for example. The power supply circuit 22 includes a dropper circuit 221, a current limiting circuit 222, and a constant voltage circuit 223. In other words, the outlet 1 includes a dropper circuit 221, a constant voltage circuit 223, and a current limiting circuit 222. The dropper circuit 221 lowers the voltage input from the external power supply 5 via the power supply terminal 4. The constant voltage circuit 223 converts the output voltage of the dropper circuit 221 into a constant voltage and supplies it to a plurality of temperature detection units 9. The current limiting circuit 222 is connected between the dropper circuit 221 and the constant voltage circuit 223 to limit the current flowing through the constant voltage circuit 223.

In the present embodiment, as shown in FIG. 11, since the voltage input from the external power supply 5 is an AC voltage, the power supply circuit 22 includes a rectifying unit 224 that converts the AC voltage into a DC voltage. The rectifying unit 224 is, for example, a diode bridge circuit (rectifying circuit) having a plurality of diodes. An AC voltage is input to the rectifying unit 224 from the external power supply 5. The rectifying unit 224 full-wave rectifies the input AC voltage and outputs it as a DC voltage.

The dropper circuit 221 is electrically connected to the subsequent stage of the rectifying unit 224. The dropper circuit 221 steps down the input DC voltage to a predetermined voltage value and outputs it to the current limiting circuit 222. The dropper circuit 221 has, for example, a Zener diode ZD1, a first resistance element R1, a second resistance element R2, a first capacitive element C1, and an active element Q1. Here, the capacitive element C1 is, for example, a ceramic capacitor, and the active element Q1 is, for example, an N-channel MOSFET. The drain terminal of the active element Q1 is electrically connected to the rectifying unit 224 via the first resistance element R1. The source terminal of the active element Q1 is electrically connected to the current limiting circuit 222. The first resistance element R1, the second resistance element R2, and the Zener diode ZD1 are electrically connected in series between the output terminals of the rectifying unit 224. Further, the anode terminal of the Zener diode ZD1 is electrically connected to the output terminal on the low potential side of the rectifying unit 224. The capacitive element C1 is connected in parallel with the Zener diode ZD1. The gate terminal of the active element Q1 is connected to the cathode terminal of the Zener diode ZD1.

A DC voltage is input to the dropper circuit 221 from the rectifying unit 224. Here, a current flows through the first resistance element R1, the second resistance element R2, and the Zener diode ZD1, and a DC voltage based on the breakdown voltage of the Zener diode ZD1 is applied to the gate terminal and the source terminal of the active element Q1. As a result, the drain terminal and the source terminal of the active element Q1 are made conductive, and the DC voltage stepped down with respect to the input DC voltage is output from the dropper circuit 221. The output voltage of the dropper circuit 221 is set to a voltage value based on the breakdown voltage of the Zener diode ZD1. Here, the capacitive element C1 functions as a low-pass filter together with the first resistance element R1 and the second resistance element R2. High frequency noise is reduced in the DC voltage output from the dropper circuit 221 by the low-pass filter composed of the capacitive element C1, the first resistance element R1 and the second resistance element R2.

The current limiting circuit 222 is electrically connected to the subsequent stage of the dropper circuit 221. The current limiting circuit 222 limits the value of the current flowing through the constant voltage circuit 223. The current limiting circuit 222 includes at least a resistance element connected in series between the dropper circuit 221 and the constant voltage circuit 223, and in the present embodiment, for example, in series between the dropper circuit 221 and the constant voltage circuit 223. It is composed of a connected third resistance element R3.

A DC voltage is input to the current limiting circuit 222 from the dropper circuit 221. Here, a current flows through the third resistance element R3, and the DC voltage is further stepped down by the third resistance element R3. The stepped-down DC voltage is output from the current limiting circuit 222. Here, the presence of the third resistance element R3 increases the impedance of the entire power supply circuit 22 and limits the current flowing through the power supply circuit 22. In other words, the current limiting circuit 222 limits the current flowing through the constant voltage circuit 223.

The constant voltage circuit 223 is electrically connected to the subsequent stage of the current limiting circuit 222. The constant voltage circuit 223 converts the input DC voltage into a voltage value necessary for the operation of the temperature detection unit 9, and outputs the operating voltage to the temperature detection unit 9.

The constant voltage circuit 223 has, for example, a rectifier diode D1, a second capacitive element C2, a regulator RG1, and a third capacitive element C3. Here, the second capacitive element C2 and the third capacitive element C3 are, for example, ceramic capacitors, and the regulator RG1 is, for example, a three-terminal regulator. The anode terminal of the rectifier diode D1 is electrically connected to the current limiting circuit 222. The input terminal of the regulator RG1 is electrically connected to the cathode terminal of the rectifying diode D1. The ground terminal of the regulator RG1 is electrically connected to the output terminal on the low potential side of the rectifying unit 224. The output terminal of the regulator RG1 is electrically connected to the temperature detection unit 9. The second capacitive element C2 is electrically connected between the cathode terminal of the rectifying diode D1 and the output terminal on the low potential side of the rectifying unit 224. The third capacitive element C3 is electrically connected between the temperature detecting unit 9 and the output terminal on the low potential side of the rectifying unit 224.

In the constant voltage circuit 223, a DC voltage is input from the current limiting circuit 222. Here, the rectifying diode D1 functions as a protection diode against the reverse connection of the input to the regulator RG1. Further, the second capacitive element C2, together with the third resistance element R3 constituting the current limiting circuit 222, functions as a low-pass filter for the input DC voltage to the regulator RG1. The DC voltage whose high frequency noise is reduced by the low-pass filter composed of the third resistance element R3 and the capacitive element C2 is input to the regulator RG1 and output from the regulator RG1 as a DC constant voltage having a predetermined voltage value. Here, the capacitive element C3, together with the regulator RG1, functions as a low-pass filter with respect to the DC constant voltage output from the regulator RG1. The DC constant voltage whose high frequency noise is reduced by the low-pass filter composed of the capacitive element C3 and the regulator RG1 is input to the temperature detection unit 9.

The circuit configuration is not limited to the above embodiment and can be changed as appropriate. Further, the configurations of the dropper circuit 221, the current limiting circuit 222, and the constant voltage circuit 223 shown in the present disclosure can be applied not only to outlets but also to other low-current wiring appliances in general.

(2.3.2) Processing Unit Next, the processing unit 10 (detection unit 101 and control unit 102) of the detection system S1 will be described with reference to FIG.

The processing unit 10 (detection unit 101 and control unit 102) is mounted on, for example, a control board 23 arranged behind the inner block 184. Further, a buzzer 15 that outputs a notification from the control unit 102 is also mounted on the control board 23, for example. The control unit 102 is electrically connected to the opening / closing unit 12, the output unit M1 (display unit 14, buzzer 15), the switch 16, and the temperature detection unit 9, and the control unit 102 is at least the opening / closing unit 12 and the output unit. It controls M1 (display unit 14 and buzzer 15).

The processing unit 10 (detection unit 101 and control unit 102) has, for example, a computer system having a processor and a memory. Then, the processor executes the program stored in the memory, so that the computer system functions as the processing unit 10. The program executed by the processor is recorded in advance in the memory of the computer system here, but may be recorded in a recording medium such as a memory card and provided, or may be provided through a telecommunication line such as the Internet. ..

The detection unit 101 determines whether or not the state of the outlet 1 is abnormal by determining whether or not the temperature detected by the temperature detection unit 9 exceeds a predetermined threshold value based on the temperature information detected by the temperature detection unit 9. It is configured to detect. The control unit 102 cuts off the power supply path L1 (hereinafter, simply referred to as a cutoff) and a notification regarding the detection result of the detection unit 101 (hereinafter, simply referred to as a notification) according to the abnormality detection result by the detection unit 101. It is configured to do at least one.

Hereinafter, the specific operation of the processing unit 10 will be described.

In the present embodiment, AC power is input from the external power source 5 to the power supply terminal 4, and the outlet 1 is required for the processing unit 10 (detection unit 101 and control unit 102) by, for example, the power supply circuit 22 mounted on the control board 23. Operating power is supplied.

When the detection unit 101 detects that the outlet 1 is at an abnormal temperature based on the detection signal from the temperature detection unit 9, the detection unit 101 outputs the abnormality detection signal to the control unit 102. The control unit 102 outputs a drive signal to the opening / closing unit 12 based on the abnormality detection signal from the detection unit 101, and controls the opening / closing unit 12 to switch from the conduction state to the cutoff state. In the present embodiment, the outlet 1 includes a pair of power supply terminals 4 having different polarities from each other and a pair of load terminals 3 having different polarities from each other. The power supply terminal 4 and the load terminal 3 having the same polarity are electrically connected via the opening / closing portion 12 by the feeding path L1 corresponding to each polarity. Here, the opening / closing unit 12 is connected between the contact device connected between the power supply terminal 4 of the L pole and the load terminal 3 of the L pole, and between the power supply terminal 4 of the N pole and the load terminal 3 of the N pole. It has a contact device to be used. The pair of contact devices included in the opening / closing unit 12 are simultaneously controlled by the control unit 102 into a conduction state or a cutoff state. Therefore, if the pair of contact devices included in the opening / closing unit 12 are in a cut-off state, both of the power supply paths L1 corresponding to the respective polarities are in a state of being electrically cut off.

Further, the control unit 102 notifies the detection result of the detection unit 101. That is, the control unit 102 notifies the user that an abnormal temperature has been detected through the output unit M1 (display unit 14 and buzzer 15). That is, in the present embodiment, the notification in the control unit 102 is realized by the light emission of the display unit 14 and the output of the notification sound from the buzzer 15.

The switch 16 is operated when the output of the notification sound of the buzzer 15 is stopped. That is, when the switch 16 is pressed while the buzzer 15 is outputting the notification sound, the control unit 102 controls the buzzer 15 so as to stop the notification sound of the buzzer 15. The switch 16 is also used as a test switch, and is also used when the contact of the opening / closing unit 12 is forcibly switched from the conduction state to the cutoff state.

Specifically, the opening / closing unit 12 has a pair of contact devices having different polarities from each other and an electromagnetic release device. Each of the pair of contact devices has a fixed contact and a movable contact. The movable contact moves between a closed position in contact with the fixed contact and an open position away from the fixed contact. The power supply terminal 4 is electrically connected to the fixed contact, and the load terminal 3 is electrically connected to the movable contact.

The opening / closing portion 12 having such a configuration is in a conductive state in which the movable contact is located at the closed position in the steady state to conduct conduction between the power supply terminal 4 and the load terminal 3. On the other hand, when the control unit 102 detects that the state of the outlet 1 is abnormal based on the temperature detected by the temperature detection unit 9, and the control unit 102 transmits a drive signal to the opening / closing unit 12, the opening / closing unit 12 receives the drive signal. The electromagnetic release device is activated to drive the movable contactor and move the movable contact to the open position. As a result, the state is switched to a cutoff state in which the power supply terminal 4 and the load terminal 3 are electrically cut off. In this way, the opening / closing unit 12 switches from the conduction state to the cutoff state by the drive signal from the control unit 102.

An operating member 13 is mechanically coupled to the opening / closing portion 12. The operating member 13 is a lever-type handle that can rotate about a rotation axis. Here, the inner cover 183 and the outer cover 182 are formed with a first operation hole 183B and a second operation hole 182D, respectively, so that the operation member 13 can be operated from the front of the outlet 1. That is, the operation member 13 is exposed to the front of the outlet 1 through the first operation hole 183B and the second operation hole 182D, and can be operated from the front of the outlet 1.

The operating member 13 is displaced with respect to the outlet 1 in response to the interruption of the power supply path L1. Specifically, the operating member 13 rotates in conjunction with the opening / closing portion 12 and moves between the on position (see FIG. 3) and the off position (see FIG. 4). The on position is a position corresponding to the conduction state of the pair of contact devices included in the opening / closing unit 12, and the off position is a position corresponding to the cutoff state of the pair of contact devices included in the opening / closing unit 12. That is, if the pair of contact devices included in the opening / closing unit 12 are in a conductive state, the operating member 13 is located at the on position as shown in FIG. When the pair of contact devices included in the operating member 13 is in the on position, the front surface of the operating member 13 is substantially flush with the front surface 1C of the outlet 1. On the other hand, when the pair of contact devices included in the opening / closing unit 12 is switched from the conduction state to the cutoff state, the operation member 13 rotates and the tip end portion of the operation member 13 moves forward (front side), as shown in FIG. , The operating member 13 moves to the off position. When the operating member 13 is in the off position, the operating member 13 projects forward from the front surface 1C of the outlet 1. When the operating member 13 is moved from the off position to the on position, the pair of contact devices included in the opening / closing unit 12 can be switched from the cutoff state to the conduction state.

In this way, when the detection unit 101 detects an abnormality in temperature, the opening / closing unit 12 is switched to the shutoff state by the control of the control unit 102, so that the power supply to the load device 2 can be stopped and the heating of the outlet 1 can be suppressed. Further, after resolving the cause of the temperature abnormality, the operating member 13 is moved from the off position to the on position to switch to the conduction state, so that the power supply to the load device 2 can be restarted.

(2.4) Detection Mode The outlet 1 includes a load terminal 3, a power supply terminal 4, and a plurality of temperature detection units 9 that detect a plurality of temperature information corresponding to at least one of the power supply path L1. Further, in the outlet 1, the detection unit 101 detects whether or not the outlet 1 is abnormal based on the difference between the plurality of temperature information detected by the plurality of temperature detection units 9.

In the present embodiment, the outlet 1 has a pair of load terminals 3, and includes a pair of temperature detection units 9 for detecting the temperature corresponding to each load terminal 3, that is, a second temperature detection unit 92. Further, the outlet 1 has a pair of power supply terminals 4, and includes a pair of temperature detection units 9 for detecting the temperature corresponding to each power supply terminal 4, that is, a first temperature detection unit 91.

Hereinafter, a plurality of detection modes when the detection unit 101 of the outlet 1 performs detection will be described in detail. The detection by the first detection mode, the second detection mode, the third detection mode, and the fourth detection mode described in detail below may be executed individually or in any combination. May be done. Further, when the detection unit 101 detects an abnormality in at least one of the detection modes executed at the same time, the power supply path is cut off by the opening / closing unit 12. At the same time, the detection result of the detection unit 101 is output from the output unit M1 to the outside.

(2.4.1) First Detection Mode In the present embodiment, the temperature information detected by each of the plurality of temperature detection units 9 includes the temperature T information. When the difference between the maximum value Tmax and the minimum value Tmin among the plurality of temperatures T detected by the plurality of temperature detection units exceeds a predetermined temperature threshold value Tth, the detection unit 101 detects that there is an abnormality. The mode is set to the first detection mode. Hereinafter, an example of the operation of the first detection mode will be described with reference to the flowchart of FIG.

First, the plurality (four) temperature detection units 9 included in the outlet 1 detect a plurality of temperatures T1 to T4 at predetermined time intervals (FIG. 12ST1). Next, the detection unit 101 obtains the maximum value Tmax and the minimum value Tmin from the plurality (4) temperatures T1 to T4 detected by the plurality (four) temperature detection units 9 at each detection timing, and Tmax and the minimum. The difference Tmax-Tmin of the value Tmin is detected (FIG. 12ST2). Then, the detection unit 101 determines whether or not the value of the difference Tmax-Tmin exceeds the predetermined temperature threshold value Tth (FIG. 12ST3). Here, when the value of Tmax-Tmin exceeds a predetermined temperature threshold value Tth, the detection unit 101 detects that there is an abnormality (FIG. 12ST4). When the detection unit 101 detects that there is an abnormality, the control unit 102 cuts off the power supply path L1 and notifies the abnormality through the output unit M1. When the value of Tmax-Tmin does not exceed the predetermined temperature threshold value Tth, the first detection mode ends the process.

(2.4.2) Second Detection Mode In the present embodiment, the temperature information detected by each of the plurality of temperature detection units 9 includes the information of the temperature change amount ΔT per unit time Δt. When the difference ΔTmax−ΔTmin between the maximum value ΔTmax and the minimum value ΔTmin among the plurality of temperature change amounts ΔT detected by the plurality of temperature detection units 9 exceeds a predetermined change amount threshold value ΔTth, the detection unit 101 Sets the detection mode for detecting that there is an abnormality as the second detection mode. Hereinafter, an example of the operation of the second detection mode will be described with reference to the flowchart of FIG.

First, the plurality (four) temperature detection units 9 included in the outlet 1 detect a plurality of temperatures T1 to T4 in a predetermined sampling cycle Δt2 in the second detection mode (FIG. 13ST1). Here, when the respective temperature detection units 9 detect the temperatures T1 to T4 in each sampling period Δt2, they obtain a difference from the temperatures T1 to T4 at the time of the previous sampling, and as shown in FIG. 4) Temperature change amounts ΔT1 to ΔT4 per unit time Δt are detected (FIG. 13ST2). In this embodiment, it is assumed that the sampling period Δt2 and the unit time Δt for obtaining the temperature change amount ΔT are equal to each other. Next, the detection unit 101 has a maximum value ΔTmax and a minimum value from the temperature change amounts ΔT1 to ΔT4 per unit time Δt of the plurality (four) detected by the plurality (four) temperature detection units 9 for each sampling cycle Δt2. Find ΔTmin. Then, as shown in FIG. 15, the detection unit 101 detects the difference ΔTmax—ΔTmin between the maximum value ΔTmax and the minimum value ΔTmin (FIG. 13ST3).

For example, the temperatures detected by the plurality of (four) temperature detection units 9 at the time t are expressed as T1 (t) to T4 (t), and per unit time Δt of the plurality (four) at the time t. The amount of temperature change of is expressed as ΔT1 (t) to ΔT4 (t). FIG. 14 shows an example of the amount of temperature change ΔT1 (t) to ΔT4 (t) at time t1, t2, and t3.

Here, the amount of temperature change ΔT1 (t) to ΔT4 (t) per unit time Δt of the plurality (four) detected by the plurality (four) temperature detection units 9 at the time t1 in the second detection mode. Is expressed as follows. The time t1 is the time that Δt has elapsed from the time t0 at which the temperature detection unit 9 first detects the temperature.
ΔT1 (t1) = T1 (t1) -T1 (t0)
ΔT2 (t1) = T2 (t1) -T2 (t0)
ΔT3 (t1) = T3 (t1) -T3 (t0)
ΔT4 (t1) = T4 (t1) -T4 (t0)

Similarly, the amount of temperature change per unit time Δt1 (4) detected by the plurality (4) temperature detection units 9 at the time t2 in which a predetermined unit time Δt has further elapsed from the time t1 (4). t) to ΔT4 (t) are expressed as follows.
ΔT1 (t2) = T1 (t2) -T1 (t1)
ΔT2 (t2) = T2 (t2) -T2 (t1)
ΔT3 (t2) = T3 (t2) -T3 (t1)
ΔT4 (t2) = T4 (t2) -T4 (t1)

Similarly, the amount of temperature change per unit time Δt1 (4) detected by the plurality (4) temperature detection units 9 at the time t3 when a predetermined unit time Δt has further elapsed from the time t2 (4). t) to ΔT4 (t) are expressed as follows.
ΔT1 (t3) = T1 (t3) -T1 (t2)
ΔT2 (t3) = T2 (t3) -T2 (t2)
ΔT3 (t3) = T3 (t3) -T3 (t2)
ΔT4 (t3) = T4 (t3) -T4 (t2)

In this way, the temperature change amount ΔT (t) is detected by the plurality (four) temperature detection units 9 every predetermined unit time Δt.

Next, the detection unit 101 determines whether or not the difference ΔTmax—ΔTmin exceeds a predetermined change amount threshold value ΔTth (FIG. 13ST4). Here, when the difference ΔTmax−ΔTmin exceeds a predetermined change amount threshold value ΔTth, the detection unit 101 detects that there is an abnormality (FIG. 13ST5). When the detection unit 101 detects that there is an abnormality, the control unit 102 cuts off the power supply path L1 and notifies the abnormality through the output unit M1. When the value of ΔTmax−ΔTmin does not exceed the predetermined temperature threshold value ΔTth, the second detection mode ends the process.

(2.4.3) Third detection mode The difference between the maximum value ΔTmax and the minimum value ΔTmin among the temperature change amounts ΔT per unit time Δt detected by the plurality of temperature detection units 9 is defined. When the predetermined change amount threshold value ΔTth is exceeded a predetermined number of times n times or more within the period, the detection unit 101 sets the detection mode for detecting that there is an abnormality as the third detection mode. Hereinafter, an example of the operation of the third detection mode will be described with reference to the flowchart of FIG.

First, as in the second detection mode, the plurality (four) temperature detection units 9 included in the outlet 1 detect a plurality of temperatures T1 to T4 in a predetermined sampling cycle Δt2 of the second detection mode (FIG. 16ST1), and then a plurality of (4) temperature change amounts ΔT1 to ΔT4 per unit time Δt (Δt2) are detected (FIG. 16ST2). Next, the detection unit 101 obtains the maximum value ΔTmax and the minimum value ΔTmin from the temperature change amounts ΔT1 to ΔT4, and detects the difference ΔTmax−ΔTmin (FIG. 16ST3). Next, the detection unit 101 determines whether or not the difference ΔTmax—ΔTmin exceeds a predetermined change amount threshold value ΔTth (FIG. 16ST4). Then, when the difference ΔTmax−ΔTmin exceeds the predetermined change amount threshold value ΔTth, the detection unit 101 sets the difference ΔTmax−ΔTmin to the predetermined change amount threshold value during the predetermined sampling cycle Δt3 of the third detection mode. It is determined whether ΔTth is exceeded a specified number of times (for example, 3 times) or more (FIG. 16ST5). Then, as shown in FIG. 17, when the number of times exceeds the specified number of times n times (for example, 3 times) during the sampling cycle Δt3 (for example, 8 times the sampling period Δt2), the detection unit 101 is abnormal. Detects the presence (Fig. 16ST6). When the detection unit 101 detects that there is an abnormality, the control unit 102 cuts off the power supply path L1 and notifies the abnormality through the output unit M1. If the predetermined change amount threshold value ΔTth is not exceeded a predetermined number of times n times or more during the sampling cycle Δt3, the third detection mode ends the process. In the present embodiment, the sampling cycle Δt3 of the third detection mode is set to be equal to or longer than the time obtained by multiplying the predetermined sampling cycle Δt2 of the second detection mode by n.

(2.4.4) Fourth Detection Mode In the present embodiment, the temperature information detected by each of the plurality of first temperature detection units 91 includes the information of the temperature change amount ΔT per unit time Δt. Further, the detection unit 101 sets the difference ΔTmax−ΔTmin between the maximum value ΔTmax and the minimum value ΔTmin among the temperature change amounts ΔT per unit time Δt, which are detected by the plurality of first temperature detection units 91, respectively. Detected as 1 temperature change amount TD1. Further, the temperature information detected by each of the plurality of second temperature detection units 92 includes the information of the temperature change amount ΔT per unit time Δt. Further, the detection unit 101 sets the difference ΔTmax−ΔTmin between the maximum value ΔTmax and the minimum value ΔTmin among the temperature change amounts ΔT per unit time Δt, which are detected by the plurality of second temperature detection units 92, respectively. 2 Detected as the amount of temperature change TD2. Then, the detection mode in which the detection unit 101 detects the presence or absence of an abnormality based on the value obtained by dividing the second temperature change amount TD2 by the first temperature change amount TD1 is set as the fourth detection mode. Hereinafter, an example of the operation of the fourth detection mode will be described with reference to the flowchart of FIG. In the flowchart of FIG. 18, the order of processing may be changed or processing may be added.

First, the plurality (two) first temperature detection units 91 included in the outlet 1 detect the temperatures T1 and T2 (FIG. 18ST1), and from the temperatures T1 and T2, every predetermined sampling cycle Δt4 in the fourth detection mode. , A plurality of (two) temperature change amounts ΔT1 and ΔT2 per unit time Δt are detected (FIG. 18ST2). In this embodiment, it is assumed that the predetermined sampling period Δt4 and Δt in the fourth detection mode are equal to each other. The detection unit 101 is the maximum from the temperature change amounts ΔT1 and ΔT2 per unit time Δt of the plurality (two) detected by the plurality (two) first temperature detection units 91 for each sampling cycle Δt4 of the fourth detection mode. The value ΔTmax and the minimum value ΔTmin are obtained. Then, as shown in FIG. 19, the detection unit 101 detects the first temperature change amount TD1 which is the difference ΔTmax−ΔTmin between the maximum value ΔTmax and the minimum value ΔTmin (FIG. 18ST3). Further, the plurality (two) second temperature detection units 92 included in the outlet 1 detect the temperatures T3 and T4 (FIG. 18ST4), and from the temperatures T3 and T4, every predetermined sampling cycle Δt4 in the fourth detection mode. , Multiple (two) temperature change amounts ΔT3 and ΔT4 per unit time Δt are detected (FIG. 18ST5). Then, the detection unit 101 includes a plurality of (two) temperature change amounts ΔT3 per unit time Δt detected by the plurality (two) second temperature detection units 92 at each predetermined sampling cycle Δt4 in the fourth detection mode. From ΔT4, the maximum value ΔTmax and the minimum value ΔTmin are obtained. Then, as shown in FIG. 19, the detection unit 101 detects the second temperature change amount TD2, which is the difference ΔTmax−ΔTmin between the maximum value ΔTmax and the minimum value ΔTmin (FIG. 18ST6). Then, the detection unit 101 obtains the value TD2 / TD1 obtained by dividing the second temperature change amount TD2 by the first temperature change amount TD1 (FIG. 18ST7). Next, the detection unit 101 determines the presence or absence of an abnormality based on the height of the value TD2 / TD1 and the predetermined threshold value TDth (FIG. 18ST8). For example, as shown in FIG. 20, when the value TD2 / TD1 exceeds the threshold value TDth, the detection unit 101 detects that there is an abnormality (FIG. 18ST9). When the detection unit 101 detects that there is an abnormality, the control unit 102 cuts off the power supply path L1 and notifies the abnormality through the output unit M1. If the value TD2 / TD1 does not exceed the predetermined threshold value TDth, the fourth detection mode ends the process.

(3) Modification Example The modification 1 of the outlet 1 will be described below. However, the components common to the outlet 1 of the above embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate. Further, each configuration of the modification described below can be applied in combination with each configuration described in the above embodiment as appropriate.

The outlet 1 described in the above embodiment includes a plurality of temperature detection units 9, and the plurality of temperature detection units 9 correspond to at least one of a load terminal 3, a power supply terminal 4, and a power supply path L1. Detect information. Modification 1 is different from the above embodiment in that a plurality of temperature detection units 9 include a reference temperature detection unit. The reference temperature detection unit detects the temperature information corresponding to the location inside the housing 1B of the outlet 1 other than the load terminal 3, the power supply terminal 4, and the power supply path L1 as the reference temperature information. The reference temperature information detected by the reference temperature detection unit includes temperature information and temperature change amount information. For example, if the temperature and the amount of temperature change detected by the reference temperature detection unit are smaller than the temperature and the amount of temperature change detected by the other temperature detection unit when the outlet 1 is energized, the first to first steps are taken. 4 The minimum value of the temperature and the amount of temperature change used for detection in the detection mode is the temperature of the reference temperature detection unit and the amount of temperature change.

Hereinafter, other modifications of the embodiment are listed. The following modifications may be realized by combining them as appropriate.

The outlet 1 may be provided with a pair of load terminals 3 having different polarities from each other and a plurality of connection ports 17 to which the plug 21 of the load device 2 is connected.

The outer cover 182 of the outlet may be a single member.

(4) Summary As described above, in the outlet (1) of the first aspect, the load terminal (3), the power supply terminal (4), the power supply path (L1), and the plurality of temperature detectors (9) And a detection unit (101). A load device (2) is connected to the load terminal (3), an external power supply (5) is connected to the power supply terminal (4), and the power supply path (L1) has a power supply terminal (4) and a load terminal (3). It is an electric line connecting between. The plurality of temperature detection units (9) detect a plurality of temperature information corresponding to at least one of the load terminal (3), the power supply terminal (4), and the power supply path (L1). The detection unit (101) detects whether or not there is an abnormality based on the difference between the plurality of temperature information detected by each of the plurality of temperature detection units (9).

According to the first aspect, the accuracy of detecting the abnormality of the outlet (1) can be improved.

In the outlet (1) of the second aspect, the temperature information detected by each of the plurality of temperature detection units (9) in the first aspect includes the temperature information. When the difference between the maximum value and the minimum value among the plurality of temperatures detected by the plurality of temperature detection units (9) exceeds a predetermined temperature threshold value, the detection unit (101) detects that there is an abnormality. ..

According to the second aspect, the accuracy of detecting the abnormality of the outlet (1) can be improved based on the difference in temperature.

In the outlet (1) of the third aspect, the temperature information detected by each of the plurality of temperature detection units (9) in the first or second aspect includes information on the amount of temperature change per unit time. The detection unit (101) has an abnormality when the difference between the maximum value and the minimum value among the plurality of temperature change amounts detected by the plurality of temperature detection units (9) exceeds a predetermined change amount threshold value. Is detected.

According to the third aspect, the accuracy of detecting the abnormality of the outlet (1) can be improved based on the difference in the amount of temperature change.

In the outlet (1) of the fourth aspect, in the third aspect, the maximum value and the minimum value of the amount of temperature change per unit time detected by the plurality of temperature detection units (9), respectively. When the difference between the two exceeds a predetermined change amount threshold value more than a specified number of times within a specified period, the detection unit (101) detects that there is an abnormality.

According to the fourth aspect, the accuracy of detecting the abnormality of the outlet (1) can be improved based on the difference in the amount of temperature change and the frequency of change in the difference in the amount of temperature change.

In the outlet (1) of the fifth aspect, in any one of the first to the fourth aspects, the outlet (1) has a plurality of load terminals (3), and the plurality of temperature detection units (9) have a plurality of temperature detection units (9). A plurality of load terminal temperature detection units (92) for detecting temperature information corresponding to the plurality of load terminals (3) are included.

According to the fifth aspect, the temperature information corresponding to the load terminal (3) can be detected.

In the outlet (1) of the sixth aspect, in the fifth aspect, the plurality of load terminals (3) are arranged symmetrically with respect to the reference plane (AA2), and the plurality of load terminal temperature detection units (92) are provided. It is arranged symmetrically with respect to the reference plane (AA2).

According to the sixth aspect, it is possible to reduce the variation in the temperature information corresponding to the plurality of load terminals (3).

In the outlet (1) of the seventh aspect, in the fifth or sixth aspect, the outlet (1) has a plurality of power supply terminals (4), and the plurality of temperature detection units (9) have a plurality of power supply terminals. It includes a plurality of power supply terminal temperature detection units (91) that detect temperature information corresponding to (4).

According to the seventh aspect, the temperature information corresponding to the power supply terminal (4) can be detected.

In the outlet (1) of the eighth aspect, in the seventh aspect, the plurality of power supply terminals (4) are arranged symmetrically with respect to the reference plane (AA1), and the plurality of power supply terminal temperature detection units (91) are provided. It is arranged symmetrically with respect to the reference plane (AA1).

According to the eighth aspect, it is possible to reduce the variation in the temperature information corresponding to the plurality of power supply terminals (4).

In the outlet (1) of the ninth aspect, in the seventh or eighth aspect, the temperature information detected by each of the plurality of power supply terminal temperature detection units (91) is the information of the amount of temperature change per unit time. include. Further, the difference between the maximum value and the minimum value among the plurality of temperature change amounts per unit time detected by the plurality of power supply terminal temperature detection units (91) is detected as the first temperature change amount (TD1). do. Further, the temperature information detected by each of the plurality of load terminal temperature detection units (92) includes information on the amount of temperature change per unit time. Further, the plurality of load terminal temperature detection units (92) detect the difference between the maximum value and the minimum value among the plurality of temperature change amounts per unit time detected as the second temperature change amount (TD2). do. Then, the detection unit (101) detects the presence or absence of an abnormality based on the value obtained by dividing the second temperature change amount (TD2) by the first temperature change amount (TD1).

According to the ninth aspect, the accuracy of detecting the abnormality of the outlet (1) can be improved by using the value obtained by dividing the second temperature change amount by the first temperature change amount.

The outlet (1) of the tenth aspect further includes a housing (1B) for holding the load terminal (3) and the power supply terminal (4) in any one of the first to ninth aspects. Further, the plurality of temperature detection units (9) provide the temperature information corresponding to the location inside the housing (1B) other than the load terminal (3), the power supply terminal (4), and the power supply path (L1) as the reference temperature information. Includes a reference temperature detector (98) to detect as.

According to the tenth aspect, the detection unit (101) can detect the presence or absence of an abnormality based on the temperature information including the temperature information detected by the reference temperature detection unit (98).

In the outlet (1) of the eleventh aspect, in any one of the first to tenth aspects, when the detection unit (101) detects an abnormality, the opening / closing unit (12) that shuts off the power supply path (L1). To prepare for.

According to the eleventh aspect, the heating of the outlet (1) can be suppressed.

The outlet (1) of the twelfth aspect includes an output unit (M1) that outputs the detection result of the detection unit (101) to the outside in any one of the first to eleventh aspects.

According to the twelfth aspect, the detection result of the detection unit (101) can be notified to the outside.

The outlet (1) of the thirteenth aspect includes a dropper circuit (221), a constant voltage circuit (223), and a current limiting circuit (222) in any one of the first to twelfth aspects. The dropper circuit (221) drops the voltage input from the external power supply (5) via the power supply terminal (4). The constant voltage circuit (223) converts the output voltage of the dropper circuit (221) into a constant voltage and supplies it to a plurality of temperature detection units (9). The current limiting circuit (222) is connected between the dropper circuit (221) and the constant voltage circuit (223) to limit the current flowing through the constant voltage circuit (223).

According to the thirteenth aspect, an appropriate value of operating voltage can be supplied to the plurality of temperature detection units (9).

In the outlet (1) of the fourteenth aspect, in the thirteenth aspect, the current limiting circuit (222) is connected in series between the dropper circuit (221) and the constant voltage circuit (223). ) At least.

According to the fourteenth aspect, the number of components of the current limiting circuit (222) can be suppressed.

The outlet (1) of the fifteenth aspect includes the capacitive element (C2) constituting the low-pass filter together with the resistance element (R3) in the fourteenth aspect.

According to the fifteenth aspect, high frequency noise of voltage can be reduced.

The configuration according to the second to fifteenth aspects is not an essential configuration for the outlet (1) and can be omitted as appropriate.

1 Outlet 1B Housing 2 Load equipment 3 Load terminal 4 Power supply terminal 5 External power supply 9 Temperature detector 91 Power supply terminal Temperature detector 92 Load terminal temperature detector 98 Reference temperature detector 101 Detection unit 12 Opening / closing unit 221 Dropper circuit 222 Current limit Circuit 223 Constant voltage circuit L1 Power supply path M1 Output section AA1 Reference surface AA2 Reference surface TD1 First temperature change TD2 Second temperature change R3 Resistance element C2 Capacitive element

Claims (15)

The load terminal to which the load device is connected and
The power supply terminal to which the external power supply is connected and
A power supply path connecting the load terminal and the power supply terminal,
A plurality of temperature detectors for detecting a plurality of temperature information corresponding to at least one of the load terminal, the power supply terminal, and the power supply path, and the like.
A detection unit that detects whether or not there is an abnormality based on the difference between the plurality of temperature information detected by each of the plurality of temperature detection units is provided.
Outlet. The plurality of temperature information detected by each of the plurality of temperature detection units includes temperature information.
When the difference between the maximum value and the minimum value among the plurality of temperatures detected by the plurality of temperature detection units exceeds a predetermined temperature threshold value, the detection unit detects that there is an abnormality.
The outlet according to claim 1. The plurality of temperature information detected by each of the plurality of temperature detection units includes information on the amount of temperature change per unit time.
When the difference between the maximum value and the minimum value among the plurality of temperature change amounts per unit time detected by the plurality of temperature detection units exceeds a predetermined change amount threshold value, the detection unit has an abnormality. Detects,
The outlet according to claim 1 or 2. The difference between the maximum value and the minimum value among the plurality of temperature change amounts per unit time detected by the plurality of temperature detection units is the specified number of times or more within the specified period, and the predetermined change amount threshold value. When the temperature exceeds, the detection unit detects that there is an abnormality.
The outlet according to claim 3. It has a plurality of the load terminals,
The plurality of temperature detectors include a plurality of load terminal temperature detectors that detect temperature information corresponding to the plurality of load terminals.
The outlet according to any one of claims 1 to 4. The plurality of load terminals are arranged symmetrically with respect to the reference plane, and the plurality of load terminals are arranged symmetrically with respect to the reference plane.
The plurality of load terminal temperature detectors are arranged symmetrically with respect to the reference plane.
The outlet according to claim 5. It has multiple power terminals,
The plurality of temperature detectors include a plurality of power supply terminal temperature detectors for detecting temperature information corresponding to the plurality of power supply terminals.
The outlet according to claim 5 or 6. The plurality of power supply terminals are arranged symmetrically with respect to the reference plane, and the plurality of power supply terminals are arranged symmetrically with respect to the reference plane.
The plurality of power supply terminal temperature detectors are arranged symmetrically with respect to the reference plane.
The outlet according to claim 7. The temperature information detected by each of the plurality of power supply terminal temperature detection units includes information on the amount of temperature change per unit time.
The difference between the maximum value and the minimum value of the plurality of temperature change amounts per unit time detected by the plurality of power supply terminal temperature detection units is detected as the first temperature change amount.
The temperature information detected by each of the plurality of load terminal temperature detection units includes information on the amount of temperature change per unit time.
The difference between the maximum value and the minimum value of the plurality of temperature change amounts per unit time detected by the plurality of load terminal temperature detection units is detected as the second temperature change amount.
The detection unit detects the presence or absence of an abnormality based on the value obtained by dividing the second temperature change amount by the first temperature change amount.
The outlet according to claim 7 or 8. Further provided with a housing for holding the load terminal and the power supply terminal,
The plurality of temperature detection units include a reference temperature detection unit that detects temperature information corresponding to a location inside the housing other than the load terminal, the power supply terminal, and the power supply path as reference temperature information.
The outlet according to any one of claims 1 to 9. When the detection unit detects an abnormality, the detection unit includes an opening / closing unit that shuts off the power supply path.
The outlet according to any one of claims 1 to 10. An output unit for outputting the detection result of the detection unit to the outside is provided.
The outlet according to any one of claims 1 to 11. A dropper circuit that drops the voltage input from the external power supply via the power supply terminal, and
A constant voltage circuit that converts the output voltage of the dropper circuit into a constant voltage and supplies it to the plurality of temperature detectors.
A current limiting circuit connected between the dropper circuit and the constant voltage circuit to limit the current flowing through the constant voltage circuit.
The outlet according to any one of claims 1 to 12. The current limiting circuit includes at least a resistance element connected in series between the dropper circuit and the constant voltage circuit.
The outlet according to claim 13. A capacitive element that constitutes a low-pass filter together with the resistance element is provided.
The outlet according to claim 14.

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