CN203932973U - Earth leakage protective device - Google Patents
Earth leakage protective device Download PDFInfo
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- CN203932973U CN203932973U CN201420276980.3U CN201420276980U CN203932973U CN 203932973 U CN203932973 U CN 203932973U CN 201420276980 U CN201420276980 U CN 201420276980U CN 203932973 U CN203932973 U CN 203932973U
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- tds
- detect switch
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- sheet metal
- temperature
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Abstract
The utility model provides a kind of earth leakage protective device, and it comprises: detection of electrical leakage unit, and it comprises many current-carrying conductors and at least one detection of electrical leakage line, wherein, detection of electrical leakage line is for detection of the electric leakage situation of current-carrying conductor; Temperature conditioning unit, it comprises that at least one is placed in the temperature detect switch (TDS) on device to be measured, temperature detect switch (TDS) is connected between detection of electrical leakage line and zero line or live wire, for the temperature of the device to be measured that detects based on it, to control the connection status of temperature detect switch (TDS).The utility model, by adopting temperature detect switch (TDS), can be protected the excessive heating situation of electrical appliance element fast, has higher reliability, and has reduced design difficulty.
Description
Technical field
The utility model belongs to domestic circuit field, and relating in particular to a kind ofly provides Power supply and with the earth leakage protective device of over-temperature protection device for household electrical appliance.
Background technology
Day by day universal along with household electrical appliance; people more and more pay attention to the use safety of household electrical appliance; at present; various electric equipment products all carry long 1 meter of left and right or longer power line in order normally to work; in order to improve the fail safe of product; the product that now also has some to there is creepage protection function, but still there are some defects in them.When the key components and parts (such as compressor, the motor of air conditioner, dehumidifier, refrigerator etc.) of electrical appliance inside because quality is bad or during fault, electric current progressively increases, cause compressor body surface temperature constantly to raise, final combustion causes fire, and the personnel that cause injure or serious property loss.
In addition, current electrical appliance, when using temperature detect switch (TDS) to protect electrical appliance, often adopts more complicated circuit to carry out temperature control, has caused design and manufacturing cost higher.
Therefore, need a kind of low cost and there is circuit and the product that can detect the inner key components and parts abnormal high temperature of household electrical appliance of high reliability, protect household electrical appliance, and prevent the fire hazard that causes thus.
Utility model content
For above, because electrical appliance excess Temperature causes dangerous problem, it is a kind of that the utility model provides, and reliability is high, with low cost; earth leakage protective device with over-temperature protection device;, for detection of the abnormal heating of key components and parts on household electrical appliance, and provide protection.
The utility model has proposed a kind of earth leakage protective device on the one hand, comprising: detection of electrical leakage unit, and it comprises many current-carrying conductors and at least one detection of electrical leakage line, wherein, described detection of electrical leakage line is for detection of the electric leakage situation of described current-carrying conductor; Temperature conditioning unit, it comprises that at least one is placed in the temperature detect switch (TDS) on device to be measured, described temperature detect switch (TDS) is connected between described detection of electrical leakage line and zero line or live wire, for the temperature of the described device to be measured that detects based on it, to control the connection status of described temperature detect switch (TDS).
Preferably, the equal coated insulation layer in the outside of each root of described many current-carrying conductors, and be coated with metallic conductor outside the insulating barrier of at least one of described many current-carrying conductors, described detection of electrical leakage line contacts with described metallic conductor.
Preferably, this device also comprises: metal screen layer, for coated described many current-carrying conductors and described detection of electrical leakage line; External insulation layer, for coated described metal screen layer.
Preferably, described detection of electrical leakage unit comprises that one end of three current-carrying conductors is coupled respectively to the live wire of power connector, zero line and interface of the ground wire, and the other end of described three current-carrying conductors is coupled respectively to the live wire of electrical appliance, zero line and interface of the ground wire.
Preferably, this device also comprises: controllable silicon, described detection of electrical leakage line is coupled to described silicon controlled and controls the utmost point.
Preferably, described temperature detect switch (TDS) comprises: switching member, it comprises temperature sensitive sheet metal, the first sheet metal and the second sheet metal, and wherein, whether described temperature sensitive sheet metal produces deformation according to temperature and form and be electrically connected to control between described the first sheet metal and the second metal.
Preferably, described temperature detect switch (TDS) also comprises: housing, for holding described switching member; Sealing plate, which is provided with respectively for being connected to the first wire of described the first sheet metal and the second metal wire and the hole that the second wire passes through; Wherein, described sealing plate is coupled with described housing, to form the airtight space that holds described switching member.
Preferably, described temperature sensitive sheet metal is coupled to tell the second sheet metal, and when described temperature sensitive sheet metal is heated while producing deformation, it to be connected with described the first sheet metal, and then makes upper bullet first and second sheet metal form to be electrically connected to.
Preferably, the surface of described temperature detect switch (TDS) is also provided with fixture, so that described temperature detect switch (TDS) can form stable being connected with described device to be measured.
Preferably, one end of a plurality of described temperature detect switch (TDS)s is connected to zero line or live wire jointly, and the other end of a plurality of described temperature detect switch (TDS)s is connected to described detection of electrical leakage line, to detect the temperature of a plurality of described objects under test simultaneously.
The utility model, by adopting detection of electrical leakage electric wire and temperature detect switch (TDS), can make earth leakage protective device have the function of overheat protector.By temperature detect switch (TDS) is placed in to object under test, such as the surface such as control board, compressor, motor, can form good protection to these critical components.The technical solution of the utility model has reduced design and the difficulty of manufacturing, and cost is low, reliability is high.
Accompanying drawing explanation
After description by reference to the given embodiment of the present utility model of following accompanying drawing, will understand better the utility model, and other objects of the present utility model, details, feature and advantage will become more apparent.In the accompanying drawings:
Fig. 1 is the schematic diagram of the utility model the first embodiment;
Fig. 2 is the schematic diagram of the utility model the second embodiment;
Fig. 3 is the schematic diagram of the utility model the 3rd embodiment;
Fig. 4 a is according to the schematic cross-section under the temperature detect switch (TDS) off-state of the utility model embodiment;
Fig. 4 b is according to the schematic cross-section under the temperature detect switch (TDS) closure state of the utility model embodiment.
Embodiment
Preferred implementation of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown preferred implementation of the present disclosure in accompanying drawing, yet should be appreciated that, can realize the disclosure and the execution mode that should do not set forth limits here with various forms.On the contrary, it is in order to make the disclosure more thorough and complete that these execution modes are provided, and can by the scope of the present disclosure complete convey to those skilled in the art.
In conjunction with diagram, embodiment of the present utility model is set forth.
Fig. 1 is the schematic diagram of the utility model the first embodiment.
Earth leakage protective device in the utility model embodiment comprises: (1) detection of electrical leakage unit, and it comprises three current-carrying conductors 6,8 and 11, and a detection of electrical leakage line 3; (2) temperature conditioning unit, it comprises temperature detect switch (TDS) SW1.
Wherein, one end of current-carrying conductor 6 joins with zero line (WHITE) through wire, reset switch (RESET), and the zero line that the other end is connected to electrical appliance 15 is connected.Equally, the two ends of current-carrying conductor 8,11 join with ground wire, the live wire of ground wire (GND), live wire (HOT) and electrical appliance (for example, air-conditioning, refrigerator, dehumidifier etc.) respectively.
The outside of current-carrying conductor 6,8,11 is coated with insulating barrier (for example, rubber, plastics), wherein, the insulating barrier of current-carrying conductor 6,11 outside is coated with again layer of metal conductor 4,9, detection of electrical leakage line 3 is arranged between metallic conductor 4,9, and contacts with metallic conductor 4,9.
Preferably, can also be coated the insulating barrier of detection of electrical leakage line 3, metallic conductor 4,9 and current-carrying conductor 8 with metallic conductor 2 simultaneously, thereby by three current-carrying conductors and extraneous shielding.
Further, earth leakage protective device also comprises controllable silicon SCR, diode D1 and D2, capacitor C 1, resistance R 2 and R3, and the tripping coil SOL composition that is built-in with iron core.The controlled stage of controllable silicon SCR is coupled between resistance R 2, R3 and by resistance R 2 and is connected to detection of electrical leakage line 3.Between the controlled stage of controllable silicon SCR and negative electrode, be parallel with resistance R 3 and capacitor C 1, obviously, these two devices can carry out voltage regulation filtering to the signal of the controlled stage of input controllable silicon SCR, have promoted the anti-interference of controllable silicon SCR to external signal.Be built in iron core and the reset switch RESET interlock of tripping coil SOL, when having electric current to pass through tripping coil SOL, coil SOL produces magnetic field, and then reset switch RESET is resetted or thread off, thereby control attaching plug, whether has power supply output.
When there is leaky between any two in current-carrying conductor 6,8,11, detection of electrical leakage line 3 can detect this leaky by metallic conductor 4,9, now will be charged on detection of electrical leakage line 3, itself and resistance R 2, R3, capacitor C 1, diode D1 or D2 form loop, in resistance R 3, form forward voltage drop, trigger controllable silicon SCR conducting, and then make generation current in tripping coil SOL.Equally, when detection of electrical leakage line 3 does not detect leaky, controllable silicon SCR cannot conducting.
When depressing the reset switch RESET of earth leakage protective device, electrical appliance 15 starts, and compressor 151 is normally worked, and temperature detect switch (TDS) (thermal protector) SW1 is in open position.
When compressor 151 is because quality is bad, when fault or other reason, its inner electric current increases, and causes compressor 151 heatings, and its surface temperature continues to rise.When compressor 151 surface temperatures reach the threshold value that temperature detect switch (TDS) SW1 sets in advance; be arranged on temperature detect switch (TDS) SW1 on compressor 151 according to thermal deformation principle; by off-state, be converted to closure state; thereby the R2 in earth leakage protective device circuit forms a leakage current signal; trigger controllable silicon SCR conducting; drive tripping coil SOL generation current; drive its inner mechanical device iron core action; impel the reset switch RESET tripping with its interlock; cutting off input side is connected with the electric power between outlet side; guarantee electrical appliance safety, prevent fire.Be understandable that, temperature detect switch (TDS) SW1 protection temperature can preset according to the specific requirement of household electrical appliance.
Fig. 2 is the schematic diagram of the utility model the second embodiment.Compared to the first embodiment in Fig. 1, increase in a second embodiment 1 and produced a leakage current signal by zero line WHITE, and can detect measurement point 13, the measurement point 131 on control board and the measurement point 132 on blower motor on the temperature compressor of a plurality of points simultaneously.When the temperature of any measurement point surpasses the dangerous values setting in advance; R2 in capital and leakage protection circuit forms a leakage current signal; trigger controllable silicon SCR conducting; drive tripping coil SOL generation current; drive the action of its inner mechanical device iron core, impel the reset switch RESET tripping with its interlock, cut off input side and be connected with the electric power between outlet side; guarantee electrical appliance safety, prevent fire.
Be understandable that, can also on more phase line or ground wire, temperature detect switch (TDS) be set.
In order to measure the temperature of a plurality of devices to be measured simultaneously, one end of at least a portion of a plurality of temperature detect switch (TDS)s can be connected to zero line or live wire jointly, the other end of a plurality of temperature detect switch (TDS)s is connected to detection of electrical leakage line, to detect the temperature of a plurality of devices to be measured simultaneously.
As shown in Figure 2, the left end of temperature detect switch (TDS) SW1-3 is all connected to detection of electrical leakage line 6, and the right-hand member of SW1, SW3 is connected to live wire, and the right-hand member of SW2 is connected to zero line.
Be understandable that, the right-hand member of temperature detect switch (TDS) SW1-3 can all be connected to live wire or zero line, also can a part be connected to live wire, and a part is connected to zero line.
Fig. 3 is the schematic diagram of the utility model the 3rd embodiment.The second embodiment compared in Fig. 2, is coupled with rectifier bridge D1-D4 between the tripping coil SOL in the 3rd embodiment and controllable silicon, thereby without the diode D1 in Fig. 2.
Fig. 4 a is according to the schematic cross-section under the temperature detect switch (TDS) off-state of the utility model embodiment.Fig. 4 b is according to the schematic cross-section under the temperature detect switch (TDS) closure state of the utility model embodiment.
Temperature detect switch (TDS) comprises switching member, and it comprises temperature sensitive sheet metal 5, the first sheet metal 3, the second sheet metal 4, and wherein, whether temperature sensitive sheet metal 5 produces deformation according to temperature and form and be electrically connected to control between the first sheet metal 3 and the second sheet metal 4.
Preferably, temperature sensitive sheet metal 5 is coupled to the second sheet metal 4, and when it is heated while producing deformation, it is the certain height of upper bullet, thereby is connected with the first sheet metal 3, and then first and second sheet metal is formed be electrically connected to.
Preferably, temperature detect switch (TDS) comprises housing 1, sealing plate 2, is connected to the first wire 6 of the first sheet metal 3 and is connected to the second wire 7 of the second sheet metal 4.Wherein, housing 1, for holding switching member; Sealing plate, which is provided with the hole that supplies the first wire 6 and the second wire 7 to pass through respectively; Wherein, sealing plate 2 is coupled with housing 1, to form the airtight space that holds switching member.
Preferably, housing 1, sealing plate 2 can be made by materials such as plastics, rubber, make that temperature detect switch (TDS) can prevent dust, waterproof, anti-electric, have promoted the reliability of switch self.Equally, housing 1 also can be made of metal, as long as make insulation between the housing 1 of metal and switching member, like this, also can increase the reliability of housing 1.
On first and second sheet metal 3,4, be respectively equipped with contact 301,501, to form at a certain temperature electrical connection.The first wire 6 is connected to detection of electrical leakage line 3, the second wires 7 and is connected to zero line or live wire.
When this temperature detect switch (TDS) being placed in to the position that needs detected temperatures, such as compressor of electrical appliance, blower fan, motor, control board etc.When these parts of electrical appliance produce high temperature until while being greater than the preset temperature of temperature detect switch (TDS), temperature sensitive metal 5 will be heated and produce deformation, thereby make contact 301,501 closures, form and be electrically connected to, then reset switch RESET disconnects, and then disconnects being electrically connected between electrical appliance 15 and supply lines.Then, the temperature detecting when temperature detect switch (TDS) declines until during lower than the preset temperature of temperature detect switch (TDS), temperature sensitive sheet metal 5 will return to the original form rapidly, and then the electrical connection between break contact 301,501.
In actual applications, the key element of electrical appliance, such as compressor, when work, can occur by a relatively large margin or the shake of upper frequency, in order still to carry out exactly temperature control under this condition, need temperature detect switch (TDS) to be fitted in well on device to be measured.
Preferably, the surface of temperature detect switch (TDS) is also provided with fixture (not shown), so that temperature detect switch (TDS) can form stable being connected with device to be measured, thereby has avoided temperature detect switch (TDS) because of shake or has rocked the coarse situation of the thermometric causing.
The utility model, by adopting temperature detect switch (TDS), can be protected the excessive heating situation of electrical appliance element fast, has higher reliability, simple in structure, has reduced design difficulty.
Those skilled in the art can understand, and above-mentioned state, only for example, is not intended to limit range of application of the present utility model.Those of ordinary skills it is also understood that various exemplary logical block, module, circuit and the algorithm steps in conjunction with the application's embodiment description can be embodied as electronic hardware, computer software or the combination of the two.In order clearly to represent this interchangeability between hardware and software, various exemplary parts, piece, module, circuit and step have all been carried out to general description around its function above.As for this function, be embodied as hardware or be embodied as software, depend on specific application and be applied to the design constraint in whole system.Those skilled in the art can realize described function in flexible mode for every kind of application-specific, still, thisly realize decision-making and should not be construed as and deviate from protection range of the present utility model.
Claims (10)
1. an earth leakage protective device, is characterized in that, comprising:
Detection of electrical leakage unit, it comprises many current-carrying conductors and at least one detection of electrical leakage line, wherein, described detection of electrical leakage line is for detection of the electric leakage situation of described current-carrying conductor;
Temperature conditioning unit, it comprises that at least one is placed in the temperature detect switch (TDS) on device to be measured, described temperature detect switch (TDS) is connected between described detection of electrical leakage line and zero line or live wire, for the temperature of the described device to be measured that detects based on it, to control the connection status of described temperature detect switch (TDS).
2. device as claimed in claim 1, it is characterized in that, the equal coated insulation layer in outside of each root of described many current-carrying conductors, and be coated with metallic conductor outside the insulating barrier of at least one of described many current-carrying conductors, described detection of electrical leakage line contacts with described metallic conductor.
3. device as claimed in claim 2, is characterized in that, also comprises:
Metal screen layer, for coated described many current-carrying conductors and described detection of electrical leakage line;
External insulation layer, for coated described metal screen layer.
4. device as claimed in claim 1, it is characterized in that, described detection of electrical leakage unit comprises that one end of three current-carrying conductors is coupled respectively to the live wire of power connector, zero line and interface of the ground wire, and the other end of described three current-carrying conductors is coupled respectively to the live wire of electrical appliance, zero line and interface of the ground wire.
5. device as claimed in claim 1, is characterized in that, also comprises controllable silicon, and described detection of electrical leakage line is coupled to described silicon controlled and controls the utmost point.
6. device as claimed in claim 1, is characterized in that, described temperature detect switch (TDS) comprises:
Switching member, it comprises temperature sensitive sheet metal, the first sheet metal and the second sheet metal, wherein, whether described temperature sensitive sheet metal produces deformation according to temperature and forms and be electrically connected to control between described the first sheet metal and the second metal.
7. device as claimed in claim 6, is characterized in that, described temperature detect switch (TDS) also comprises:
Housing, for holding described switching member;
Sealing plate, which is provided with respectively for being connected to the first wire of described the first sheet metal and the second metal wire and the hole that the second wire passes through;
Wherein, described sealing plate is coupled with described housing, to form the airtight space that holds described switching member.
8. device as claimed in claim 6, it is characterized in that, described temperature sensitive sheet metal is coupled to tell the second sheet metal, when described temperature sensitive sheet metal is heated generation deformation, it to be connected with described the first sheet metal, and then makes upper bullet first and second sheet metal form to be electrically connected to.
9. device as claimed in claim 1, is characterized in that, the surface of described temperature detect switch (TDS) is also provided with fixture, so that described temperature detect switch (TDS) can form stable being connected with described device to be measured.
10. device as claimed in claim 1, it is characterized in that, one end of at least a portion in a plurality of described temperature detect switch (TDS)s is connected to zero line or live wire, and the other end of a plurality of described temperature detect switch (TDS)s is connected to described detection of electrical leakage line, to detect the temperature of a plurality of described devices to be measured simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420276980.3U CN203932973U (en) | 2014-05-28 | 2014-05-28 | Earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420276980.3U CN203932973U (en) | 2014-05-28 | 2014-05-28 | Earth leakage protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203932973U true CN203932973U (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420276980.3U Expired - Lifetime CN203932973U (en) | 2014-05-28 | 2014-05-28 | Earth leakage protective device |
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| Country | Link |
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| CN (1) | CN203932973U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449635A (en) * | 2014-05-28 | 2016-03-30 | 益而益(集团)有限公司 | Electric leakage protector with overtemperature protection device |
| CN108808622A (en) * | 2017-05-03 | 2018-11-13 | 空中客车运营简化股份公司 | Including electrical protective device（Current offset）Current source road and method of supplying power to |
| CN109425118A (en) * | 2017-08-24 | 2019-03-05 | 江苏威能电气有限公司 | A kind of anti-leakage structure |
-
2014
- 2014-05-28 CN CN201420276980.3U patent/CN203932973U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449635A (en) * | 2014-05-28 | 2016-03-30 | 益而益(集团)有限公司 | Electric leakage protector with overtemperature protection device |
| CN105449635B (en) * | 2014-05-28 | 2018-12-28 | 益而益(集团)有限公司 | Earth leakage protective device with over-temperature protection device |
| CN108808622A (en) * | 2017-05-03 | 2018-11-13 | 空中客车运营简化股份公司 | Including electrical protective device（Current offset）Current source road and method of supplying power to |
| CN108808622B (en) * | 2017-05-03 | 2019-12-13 | 空中客车运营简化股份公司 | Electrical link comprising an electrical protection device and method of supplying power |
| CN109425118A (en) * | 2017-08-24 | 2019-03-05 | 江苏威能电气有限公司 | A kind of anti-leakage structure |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141105 |