CN104701682A - Over-temperature protection device of alternating-current socket and electric equipment provided with over-temperature protection device - Google Patents
Over-temperature protection device of alternating-current socket and electric equipment provided with over-temperature protection device Download PDFInfo
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- CN104701682A CN104701682A CN201310671629.4A CN201310671629A CN104701682A CN 104701682 A CN104701682 A CN 104701682A CN 201310671629 A CN201310671629 A CN 201310671629A CN 104701682 A CN104701682 A CN 104701682A
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- 239000002184 metal Substances 0.000 claims abstract description 30
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 35
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 abstract description 8
- 239000004033 plastic Substances 0.000 abstract description 8
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000004568 cement Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention discloses an over-temperature protection device of an alternating-current socket. The over-temperature protection device comprises a power plug, a sampling circuit and a controller; at least one thermistor used for detecting temperature of a conducting metal piece in the power plug is arranged inside the power plug; the sampling circuit is used for sampling resistance of the thermistor so as to generate sampling signals; the controller is connected with the sampling circuit and controls a power supply of an alternating-current power circuit connected in the electrical equipment to be disconnected. The over-temperature protection device can have a main electric circuit of the electric equipment disconnected when the power plug or socket is over high in temperature, so that melting deformation of plastic of the socket due to high temperature is avoided, short circuit accidents of the power supply is avoided, and electrical safety is guaranteed. The invention further discloses electric equipment provided with the over-temperature protection device of the alternating-current socket.
Description
Technical field
The present invention relates to technical field of electric appliances, particularly a kind of over-temperature protection device of AC Power supply socket and a kind of power consumption equipment with this over-temperature protection device.
Background technology
For old buildings, socket on its wall is because Long-Time Service, metal clips elastic fatigue in socket can be caused, in addition, socket, because of Long Term Contact air, also can make the dust accumulation in it, and the socket especially on kitchen wall more can invade corrosion because of oil smoke, accelerate metal clips surface oxidation in socket, after these factors all can cause socket and plug to engage, contact point resistance raises.
Like this, if the metal clips dirty oxidation in surface, contact point temperature will be caused to raise fast when big current flows through high resistance contact point, such as, electromagnetic oven is when total power uses, flow through the electric current of socket metallic contact up to 10A, the temperature of high resistance contact point will be caused to raise, after temperature is more than 120 degrees Celsius, socket plastic cement starts to soften, if continue electricity consumption, contact point constant temperature raises, cause socket plastic melt to be out of shape the most at last, metal clips departs from original position, thus causes power supply short circuit accident to occur.And in correlation technique, in supply socket and plug, all do not limit the protective device of excessive temperature.
Summary of the invention
Object of the present invention is intended to solve above-mentioned technological deficiency at least to a certain extent.
For this reason; one object of the present invention is the over-temperature protection device proposing a kind of AC Power supply socket; the over-temperature protection device of this AC Power supply socket can when the temperature of attaching plug or socket be too high; disconnect the power supply exchanging electricity consumption loop; thus avoid supply socket because of the danger of high temperature melt, ensure Electrical Safety.
Another object of the present invention is to propose a kind of power consumption equipment.
For achieving the above object, the over-temperature protection device of a kind of AC Power supply socket that one aspect of the present invention embodiment proposes, comprise: attaching plug, described attaching plug inside is provided with at least one for detecting the thermistor of conductive metal sheet temperature in described attaching plug; For sampling to the resistance of described thermistor the sample circuit generating sampled signal; Controller, described controller is connected with described sample circuit, and described controller controls according to described sampled signal the break-make exchanging the power supply in electricity consumption loop in access power consumption equipment.
According to the over-temperature protection device of the AC Power supply socket that the embodiment of the present invention proposes, sample to generate sampled signal by the resistance of sample circuit to thermistor, and controller judges the temperature of attaching plug or socket according to sampled signal, thus control the break-make exchanging the power supply in electricity consumption loop in access power consumption equipment, therefore, the over-temperature protection device of this AC Power supply socket can when the temperature of attaching plug or socket be too high, disconnect the power supply exchanging electricity consumption loop in access power consumption equipment, the electric current flowing through supply socket and plug is reduced very significantly, thus avoid the plastic cement Yin Gaowen of socket and melt distortion, thus avoid power supply short circuit accident, ensure Electrical Safety.
Preferably, at least one thermistor described contacts described conductive metal sheet.
Further, described thermistor can be two, is respectively the first thermistor and the second thermistor, and described first thermistor and described second thermistor are separately positioned on two corresponding conductive metal sheets.Certainly, described thermistor also can be one.
Preferably, each thermistor is arranged on corresponding conductive metal sheet by heat conduction cohesive material.
Particularly, described first thermistor and described second thermistor are connected in series.
Further, the direct current that alternating current by described attaching plug is converted to predeterminated voltage by the AC-DC converter in described power consumption equipment thinks that described sample circuit and described controller are powered, described attaching plug comprises: the first power lead and second source wire, one end of described first power lead is connected with corresponding two conductive metal sheets respectively with one end of described second source wire, and the other end of described first power lead is connected with power consumption equipment respectively with the other end of described second source wire, walk abreast with described first power lead and described second source wire and isolate the first resistance arranged and transmit wire and the second resistance transmits wire, one end that described first resistance transmits wire is connected with one end of described first thermistor, the other end that described first resistance transmits wire is connected with the direct current of described predeterminated voltage, the other end of described first thermistor is connected with one end of described second thermistor, one end that the other end and described second resistance of described second thermistor transmit wire is connected, the other end that described second resistance transmits wire is connected with described sample circuit.
Particularly, described sample circuit comprises: comparator, and the other end that normal phase input end and described second resistance of described comparator transmit wire is connected, and the output of described comparator is connected with described controller; First resistance, one end of described first resistance is connected with the direct current of described predeterminated voltage, and the other end of described first resistance is connected with the inverting input of described comparator; Voltage stabilizing didoe, the negative electrode of described voltage stabilizing didoe is connected with the inverting input of described comparator with the other end of described first resistance respectively, described voltage stabilizing didoe plus earth; Second resistance, one end of described second resistance is connected with the normal phase input end of described comparator, the other end ground connection of described second resistance.
Further, described sample circuit also comprises the 3rd resistance, and one end of described 3rd resistance is connected with the direct current of described predeterminated voltage, and the other end of described 3rd resistance is connected with the output of described comparator.
Preferably; described over-temperature protection device also comprises: prompting device; described prompting device is connected with described controller, and when the power supply that described controller controls the described interchange electricity consumption loop of access disconnects, described prompting device sends alarm under the control of described controller.
For achieving the above object; the present invention on the other hand embodiment proposes a kind of power consumption equipment; it comprises the over-temperature protection device of above-mentioned AC Power supply socket; described power consumption equipment has interchange electricity consumption loop; be provided with gate-controlled switch in described interchange electricity consumption loop, the control end of described gate-controlled switch is connected with described controller.
According to the power consumption equipment that the embodiment of the present invention proposes, can when the temperature of attaching plug or socket to be too high, the power supply controlling to exchange in access power consumption equipment electricity consumption loop disconnects, thus avoids the plastic cement Yin Gaowen of socket and melt distortion, thus avoid power supply short circuit accident, ensure Electrical Safety.
Preferably, described power consumption equipment can be electromagnetic oven, and described interchange electricity consumption loop can be resonance heating circuit, and described gate-controlled switch can be IGBT.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the block diagram of the over-temperature protection device of AC Power supply socket according to the embodiment of the present invention;
Fig. 2 is according to the structural representation being provided with the attaching plug of two thermistors in the over-temperature protection device of the AC Power supply socket of the embodiment of the present invention;
Fig. 3 is according to the structural representation being provided with the attaching plug of a thermistor in the over-temperature protection device of the AC Power supply socket of the embodiment of the present invention;
Fig. 4 is the principle schematic according to the sample circuit in the over-temperature protection device of the AC Power supply socket of the embodiment of the present invention;
Fig. 5 is input, the output waveform schematic diagram of comparator according to the sample circuit in the over-temperature protection device of the AC Power supply socket of the embodiment of the present invention;
Fig. 6 is the block diagram of the over-temperature protection device of AC Power supply socket in accordance with a preferred embodiment of the present invention; And
Fig. 7 is the block diagram of the power consumption equipment according to the embodiment of the present invention; And
Fig. 8 is the structural representation of power consumption equipment in accordance with a preferred embodiment of the present invention.
Reference numeral:
Attaching plug 10, sample circuit 20, controller 30, prompting device 50, heat conduction cohesive material 1, thermistor 2, first thermistor 21, second thermistor 22, conductive metal sheet 5, first power lead 31, second source wire 32, first resistance transmits wire 41, second resistance transmits wire 42, comparator LM, first resistance R1, voltage stabilizing didoe ZD, second resistance R2, power consumption equipment 701, over-temperature protection device 702, exchange electricity consumption loop 40, gate-controlled switch 704, AC-DC converter 705.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Describe the over-temperature protection device of the AC Power supply socket proposed according to the embodiment of the present invention with reference to the accompanying drawings and there is the power consumption equipment of this over-temperature protection device.
Fig. 1 is the block diagram of the over-temperature protection device of AC Power supply socket according to the embodiment of the present invention.As shown in Figure 1, this interchange electricity consumption loop over-temperature protection device 701 comprises: attaching plug 10, sample circuit 20 and controller 30.
Wherein, as shown in Figures 2 and 3, attaching plug 10 inside is provided with at least one for detecting the thermistor 2 of the temperature of conductive metal sheet 5 in attaching plug 10, particularly, conductive metal sheet 5 can the temperature of conduct electricity supply socket or attaching plug to thermistor 2, that is, the temperature on the conductive metal sheet 5 that detects of thermistor 2 is the temperature of supply socket or attaching plug.
As shown in Figure 1, sample circuit 20 is for sampling to generate sampled signal to the resistance of thermistor 2, and wherein, sample circuit 20 can be arranged on the motherboard of power consumption equipment.Controller 30 is connected with sample circuit 20, and controller 30 controls the break-make of the power supply in the interchange electricity consumption loop 40 of access power consumption equipment according to sampled signal.
That is, the resistance of thermistor 2 corresponding to the temperature on conductive metal sheet 5 change and change, namely this change in resistance is as the foundation of variations in temperature on conductive metal sheet 5.Temperature reach certain value such as 90 DEG C time, correspondingly, thermistor 2 reaches certain resistance such as 8.997 kilo-ohms; Temperature reach another value such as 25 DEG C time, correspondingly, thermistor 2 reaches certain resistance such as 100 kilo-ohms.Like this, the resistance of sample circuit 20 pairs of thermistors 2 samples to generate sampled signal, according to sampled signal, controller 30 judges whether the temperature of supply socket or attaching plug reaches preset critical such as 90 DEG C, if reached, then controller 30 controls the disconnection in the interchange electricity consumption loop 40 of power consumption equipment.Further, the temperature of supply socket or attaching plug lower than preset critical such as 90 DEG C time, controller 30 controls interchange electricity consumption loop 40 conducting of access power consumption equipment according to sampled signal.The distortion melt temperature of usual attaching plug plastic cement is about 120 DEG C, the present embodiment is when detecting that temperature reaches 90 DEG C, namely before AC Power supply socket or plug distortion, then control the power supply in the interchange electricity consumption loop 40 disconnecting power consumption equipment, can effectively prevent supply socket or plug from melting.
Particularly, in one embodiment of the invention, as shown in Figure 2 or Figure 3, at least one thermistor 2 contacts conductive metal sheet 5, such as, can be arranged on conductive metal sheet 5.
Wherein, as shown in Figure 2, thermistor 2 can be two, be respectively the first thermistor 21 and the second thermistor 22, first thermistor 21 and the second thermistor 22 are separately positioned on two corresponding conductive metal sheets 5, and the first thermistor 21 and the second thermistor 22 are connected in series.Wherein, the first thermistor 21 and the second thermistor 22 can be same model.
Certainly, as shown in Figure 3, thermistor 2 also can be one, is arranged on one of them conductive metal sheet 5.
Preferably, as shown in Figure 2, each thermistor 2 is arranged on corresponding conductive metal sheet 5 by heat conduction cohesive material 1.That is, heat conduction cohesive material 1 for thermistor 2 is bonded at conductive metal sheet 5, and by the temperature conduction on conductive metal sheet 5 to thermistor 2.
In an embodiment of the invention, as shown in Figure 4, the alternating current by attaching plug is converted to the direct current of predeterminated voltage by the AC-DC converter 705 in power consumption equipment, the direct current of such as+5V, thinks that sample circuit 20 and controller 30 are powered.
Further, as shown in Figure 2 or Figure 3, attaching plug 10 comprises: the first power lead 31, second source wire 32, first resistance transmit wire 41 and the second resistance transmits wire 42.Wherein, one end of first power lead 31 and one end of second source wire 32 are connected with corresponding two conductive metal sheets 5 respectively, the other end of the first power lead 31 is connected with power consumption equipment respectively with the other end of second source wire 32, such as, can be connected with the electricity consumption loop 40 that exchanges of power consumption equipment.First resistance transmission wire 41 and the second resistance are transmitted wire 42 and the first power lead 31 and second source wire 32 parallel isolation and are arranged.Specifically, the first power lead 31 and second source wire 32 are general attaching plug AC power conductors used, for power supply is conducted to power consumption equipment; And the first resistance transmits wire 41 and the resistance of thermistor 2 is passed to sample circuit 20 by the second resistance transmission wire 42.
As shown in Figure 2, thermistor 2 is two, one end that first resistance transmits wire 41 is connected with one end of the first thermistor 21, first resistance is transmitted the other end of wire 41 and is connected with the direct current of the direct current such as+5V of predeterminated voltage, the other end of the first thermistor 21 is connected with one end of the second thermistor 22, one end that the other end and second resistance of the second thermistor 22 transmit wire 42 is connected, and the other end that the second resistance transmits wire 42 is connected with sample circuit 20.
As shown in Figure 3, thermistor 2 can be one, one end that first resistance transmits wire 41 is connected with one end of thermistor 2, first resistance is transmitted the other end of wire 41 and is connected with the direct current such as+5V direct current of predeterminated voltage, one end that second resistance transmits wire 42 is connected with the other end of thermistor 2, and the other end that the second resistance transmits wire 42 is connected with sample circuit 20.It should be noted that, the other end that first resistance transmits wire 41 also can be connected with sample circuit 20, the other end of the second resistance transmission wire 42 also can be connected with+5V direct current simultaneously, that is, can one of them be selected to be connected with sampled point circuit 20 in the first resistance transmission wire 41 with the second resistance transmission wire 42, and another is connected with+5V direct current, there is no the requirement of polarity, connect.
In one particular embodiment of the present invention, as shown in Figure 4, sample circuit 20 comprises: comparator LM, the first resistance R1, voltage stabilizing didoe ZD, the second resistance R2 and the 3rd resistance R3.Particularly, comparator LM can be voltage-type comparator.
Wherein, the other end that normal phase input end B and second resistance of comparator LM transmit wire 42 is connected, and the output C of comparator LM is connected with controller 30.One end of first resistance R1 is connected with default power supply such as+5V, and the other end of the first resistance R1 is connected with the anti-normal phase input end A of comparator LM.The negative electrode of voltage stabilizing didoe ZD is connected with the anti-normal phase input end A of comparator LM with the other end of the first resistance R1, voltage stabilizing didoe ZD plus earth.One end of second resistance R2 is connected with the normal phase input end B of comparator LM, the other end ground connection of the second resistance R2.In addition, one end of the 3rd resistance R3 is connected with the direct current of predeterminated voltage, and the other end of the 3rd resistance R3 is connected with the output C of comparator LM.Certainly, in other embodiments of the invention, the resistance of other circuit to thermistor also can be adopted to sample.
Specifically, when the voltage VB of the normal phase input end B of comparator LM is less than the burning voltage of the voltage VA of the inverting input A of comparator LM and voltage stabilizing didoe ZD, the output voltage VC of the output C of comparator LM is low level, and be transferred to controller 30, and then control the power turn-on in incoming transport electricity consumption loop 40; When the voltage VB of the normal phase input end B of comparator LM is greater than the burning voltage of the voltage VA of the inverting input A of comparator LM and voltage stabilizing didoe ZD, the output of the output C of comparator LM itself is high impedance status, thus the output voltage VC of output C forms substantial high level via the 3rd resistance R3 pull-up, and be transferred to controller 30, and then the power supply controlling incoming transport electricity consumption loop 40 disconnects.That is, when the voltage VB of the normal phase input end B of comparator LM equals the burning voltage of voltage stabilizing didoe ZD, the output voltage VC of the output C of comparator LM is in the critical point changed.
In an example of the present invention, the resistance of the first resistance R1 can be 4.7k Ω; The resistance of the second resistance R2 can be 6k Ω; The burning voltage of voltage stabilizing didoe ZD can be 2.0V, and namely the voltage VA of the inverting input A of comparator LM is 2.0V; The operating characteristic of thermistor 2 can be: 25 DEG C time, and resistance is 100k Ω; 90 DEG C time, resistance is 8.997k Ω.Like this, the sample circuit 20 according to Fig. 4,90 DEG C time, can calculate the voltage VB of the normal phase input end B of comparator LM, and when thermistor 2 is one, its voltage VB is:
When thermistor 2 is two, the resistance of the second resistance R2 can be 12k Ω, and its voltage VB is:
That is, when the temperature of the conductive metal sheet 5 that thermistor 2 detects is 90 DEG C, correspondingly, the voltage VB of the normal phase input end B of comparator LM is 2.0V, and the output voltage VC of comparator LM output is in the critical point changed.As shown in Figure 5, when temperature is greater than 90 DEG C, the voltage VB of the normal phase input end B of comparator LM is greater than voltage VA and 2.0V of inverting input A, the output cut-off of comparator LM output C, but because the effect of the 3rd resistance R3 pull-up, VC becomes high level such as+5V, and then the power supply controlling incoming transport electricity consumption loop 40 disconnects, after power supply disconnects, within the extremely short time, the temperature of supply socket or plug also can continue to rise, thus produce a little voltage rise, afterwards, the temperature of supply socket or plug starts to reduce gradually, when temperature is less than 90 DEG C, the voltage VB of the normal phase input end B of comparator LM is less than 2.0V, the output voltage VC of comparator LM output C is low level such as 0V, and then control the power turn-on in incoming transport electricity consumption loop 40.Further, exchange the power reduction in electricity consumption loop 40, the temperature of supply socket or plug, lower than 90 DEG C, controls power supply constant conduction.
In a preferred embodiment, as shown in Figure 6, the over-temperature protection device 702 of above-mentioned AC Power supply socket also comprises prompting device 50.Wherein, prompting device 50 is connected with controller 30, and when the power supply that controller 30 controls incoming transport electricity consumption loop 40 disconnects, prompting device 50 sends alarm under the control of the controller 30; thus the over-temperature protection device 702 of this AC Power supply socket can be warned to user.
According to the over-temperature protection device of the AC Power supply socket of the embodiment of the present invention, sample to generate sampled signal by the resistance of sample circuit to thermistor, and controller judges the temperature of attaching plug or socket according to sampled signal, thus control the break-make exchanging electricity consumption ring current in access power consumption equipment, therefore, this over-temperature protection device can when the temperature of attaching plug or socket be too high, disconnect the power supply in incoming transport electricity consumption loop, thus avoid the plastic cement Yin Gaowen of socket and melt distortion, thus avoid power supply short circuit accident, ensure Electrical Safety.
Fig. 7 is the block diagram of the power consumption equipment according to the embodiment of the present invention.As shown in Figure 7; power consumption equipment 701 comprises the over-temperature protection device 702 of above-mentioned AC Power supply socket; power consumption equipment 701 has interchange electricity consumption loop 40, and exchange in electricity consumption loop 40 and be provided with gate-controlled switch 704, the control end of gate-controlled switch 704 is connected with controller 30.Preferably, when thermistor is two, the structural representation of the power consumption equipment of the embodiment of the present invention as shown in Figure 8.
In addition, as shown in Figure 8, power consumption equipment 701 also has AC-DC converter 705, and the direct current that the alternating current by attaching plug is converted to predeterminated voltage by the AC-DC converter 705 in power consumption equipment 701 thinks that sample circuit 20 and controller 30 are powered.
Particularly, this power consumption equipment can be electromagnetic oven, electric cooker, electric pressure cooker etc.
Preferably, power consumption equipment 701 can be electromagnetic oven, and exchanging electricity consumption loop 40 can be resonance heating circuit, and gate-controlled switch 704 can be IGBT.
According to the power consumption equipment of the embodiment of the present invention, when the temperature of attaching plug or socket is too high, access can be controlled and mainly disconnects with the power supply in Electricity loop, thus avoid the plastics Yin Gaowen of socket and melt distortion, thus avoid power supply short circuit accident, ensure Electrical Safety.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (11)
1. an over-temperature protection device for AC Power supply socket, is characterized in that, comprising:
Attaching plug, described attaching plug inside is provided with at least one for detecting the thermistor of conductive metal sheet temperature in described attaching plug;
For sampling to the resistance of described thermistor the sample circuit generating sampled signal;
Controller, described controller is connected with described sample circuit, and described controller controls according to described sampled signal the break-make exchanging the power supply in electricity consumption loop in access power consumption equipment.
2. the over-temperature protection device of AC Power supply socket as claimed in claim 1, it is characterized in that, at least one thermistor described contacts described conductive metal sheet.
3. the over-temperature protection device of AC Power supply socket as claimed in claim 1; it is characterized in that; described thermistor is two, is respectively the first thermistor and the second thermistor, and described first thermistor and described second thermistor are separately positioned on two corresponding conductive metal sheets.
4. the over-temperature protection device of AC Power supply socket as claimed in claim 3, is characterized in that, each thermistor is arranged on corresponding conductive metal sheet by heat conduction cohesive material.
5. the over-temperature protection device of AC Power supply socket as claimed in claim 3, it is characterized in that, described first thermistor and described second thermistor are connected in series.
6. the over-temperature protection device of AC Power supply socket as claimed in claim 5; it is characterized in that; the direct current that alternating current by described attaching plug is converted to predeterminated voltage by the AC-DC converter in described power consumption equipment thinks that described sample circuit and described controller are powered, and described attaching plug comprises:
First power lead and second source wire, one end of described first power lead is connected with corresponding two conductive metal sheets respectively with one end of described second source wire, and the other end of described first power lead is connected with power consumption equipment respectively with the other end of described second source wire;
Walk abreast with described first power lead and described second source wire and isolate the first resistance arranged and transmit wire and the second resistance transmits wire, one end that described first resistance transmits wire is connected with one end of described first thermistor, the other end that described first resistance transmits wire is connected with the direct current of described predeterminated voltage, the other end of described first thermistor is connected with one end of described second thermistor, one end that the other end and described second resistance of described second thermistor transmit wire is connected, the other end that described second resistance transmits wire is connected with described sample circuit.
7. the over-temperature protection device of AC Power supply socket as claimed in claim 6, it is characterized in that, described sample circuit comprises:
Comparator, the other end that normal phase input end and described second resistance of described comparator transmit wire is connected, and the output of described comparator is connected with described controller;
First resistance, one end of described first resistance is connected with the direct current of described predeterminated voltage, and the other end of described first resistance is connected with the inverting input of described comparator;
Voltage stabilizing didoe, the negative electrode of described voltage stabilizing didoe is connected with the inverting input of described comparator with the other end of described first resistance respectively, described voltage stabilizing didoe plus earth;
Second resistance, one end of described second resistance is connected with the normal phase input end of described comparator, the other end ground connection of described second resistance.
8. the over-temperature protection device of AC Power supply socket as claimed in claim 7; it is characterized in that; described sample circuit also comprises the 3rd resistance, and one end of described 3rd resistance is connected with the direct current of described predeterminated voltage, and the other end of described 3rd resistance is connected with the output of described comparator.
9. the over-temperature protection device of the AC Power supply socket according to any one of claim 1-8, is characterized in that, also comprises:
Prompting device, described prompting device is connected with described controller, and when the power supply that described controller controls described interchange electricity consumption loop disconnects, described prompting device sends alarm under the control of described controller.
10. a power consumption equipment; it is characterized in that; comprise the over-temperature protection device of AC Power supply socket as claimed in any one of claims 1-9 wherein; described power consumption equipment has interchange electricity consumption loop; be provided with gate-controlled switch in described interchange electricity consumption loop, the control end of described gate-controlled switch is connected with described controller.
11. power consumption equipments as claimed in claim 10, it is characterized in that, described power consumption equipment is electromagnetic oven, and described interchange electricity consumption loop is resonance heating circuit, and described gate-controlled switch is IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671629.4A CN104701682A (en) | 2013-12-10 | 2013-12-10 | Over-temperature protection device of alternating-current socket and electric equipment provided with over-temperature protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671629.4A CN104701682A (en) | 2013-12-10 | 2013-12-10 | Over-temperature protection device of alternating-current socket and electric equipment provided with over-temperature protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104701682A true CN104701682A (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310671629.4A Pending CN104701682A (en) | 2013-12-10 | 2013-12-10 | Over-temperature protection device of alternating-current socket and electric equipment provided with over-temperature protection device |
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| Country | Link |
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| CN (1) | CN104701682A (en) |
Cited By (3)
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| DE102017122297B3 (en) | 2017-09-26 | 2019-02-28 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Method and device for determining the temperature of an electrical contact |
| DE102017222541A1 (en) * | 2017-12-13 | 2019-06-13 | Bayerische Motoren Werke Aktiengesellschaft | High-voltage connector part for a high-voltage connector of a motor vehicle, high-voltage vehicle electrical system and motor vehicle |
| CN112310726A (en) * | 2020-11-06 | 2021-02-02 | 南京康尼新能源汽车零部件有限公司 | Power supply plug with temperature monitoring function and control method |
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Application publication date: 20150610 |