CN104851744A - Active heating-type overheating protective device - Google Patents
Active heating-type overheating protective device Download PDFInfo
- Publication number
- CN104851744A CN104851744A CN201510277544.7A CN201510277544A CN104851744A CN 104851744 A CN104851744 A CN 104851744A CN 201510277544 A CN201510277544 A CN 201510277544A CN 104851744 A CN104851744 A CN 104851744A
- Authority
- CN
- China
- Prior art keywords
- heating resistor
- contact
- bimetal leaf
- heating
- controlled device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000013021 overheating Methods 0.000 title abstract description 6
- 230000001681 protective effect Effects 0.000 title abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 206010037660 Pyrexia Diseases 0.000 claims description 35
- 239000000919 ceramic Substances 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 229920003266 Leaf® Polymers 0.000 description 25
- 230000035882 stress Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000001012 protector Effects 0.000 description 5
- 238000010792 warming Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 239000012671 ceramic insulating material Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H2037/549—Details of movement transmission between bimetallic snap element and contact
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The invention discloses an active heating-type overheating protective device which is composed of a heating sheet 2, a pin 1 and a bimetallic strip 7. The bimetallic strip 7 is tightly attached to the heating sheet 2. The pin 1, a heating resistor 3 in the heating sheet 2 and the bimetallic strip 7 are serially connected in sequence. In use, the protective device is required to be serially connected with a controlled device, and current through the heating resistor 3 is enabled to be consistent with current of the controlled device. When the current of the controlled device is abnormally increased, and the heating resistor 3 actively emits heat to enable the bimetallic strip 7 to act quickly for disconnecting a circuit, so that the overheating fault of the controlled device is prevented. The bimetallic strip 7 is reset for connecting the circuit when the temperature of the controlled device and the temperature of the heating resistor 3 are lowered, and the controlled device can operate normally again. The protective device provided by the invention fully protects the safety operation of the controlled device, and the service life of the controlled device is prolonged.
Description
Technical field
The present invention relates to a kind of initiatively heating type overtemperature protection system, belong to overtemperature protection system technical field.
Background technology
Domestic electric appliance motor and electric equipment, as motor for washer, air conditioner fan motor, transformer, ballast, electric heating appliance etc., all need overheat protector is installed, this overheat protector is the thermostat of a kind of bimetal leaf as temperature-sensing element, when electrical equipment normally works, bimetal leaf is in free state, contact is in closed/off-state, when temperature is increased to operating temperature value, bimetallic element is heated and produces internal stress and rapidly action, opened/closed contact, cut off/connect circuit, thus play heat protective effect, contact closed/disconnection automatically when temperature drops to design temperature, recover normal operating conditions.Current this overheat protector adopts and directly contacts warming method or indirect contact warming method, direct contact warming method should make product be adjacent to the installed surface of controlled utensil, the temperature of controlled utensil exception raises and directly transfers heat to bimetallic element, bimetallic element is heated produce internal stress and rapidly action, opened/closed contact; Indirect contact warming method, product does not need to be adjacent to controlled utensil, it has a heat conducting element between controlled utensil and bimetallic element, the temperature of controlled utensil exception is raised through heat conducting element and transfers heat to bimetallic element, bimetallic element is heated produce internal stress and rapidly action, opened/closed contact.Adopt the mode of such contact temperature-sensitive, in order to can the variations in temperature of the controlled utensil of quick sensing, installed surface overheat protector being adjacent to controlled utensil is needed to install, or installed surface heat conducting element being adjacent to controlled utensil is installed, being subject to spatial limitation sometimes causes installation difficulty even cannot install, and the overheated heat conduction of controlled appliance internal is to surface, sometimes also need to be transmitted to bimetallic element through heat conducting element, this process also needs the regular hour, cause overheat protector action delayed, often cause over-heat inside, affect Electrical Safety, larger to the aging effects of controlled utensil.
Summary of the invention
Object of the present invention is just to provide a kind of initiatively heating type overtemperature protection system, and it has, and overtemperature protection is swift in motion, security of operation, advantage easy for installation.
For achieving the above object, the technical solution used in the present invention is: a kind of initiatively heating type overtemperature protection system, by fever tablet, pin, bimetal leaf forms, heating resistor is had in fever tablet, pin, fixed contact is electrically connected with heating resistor respectively, bimetal leaf is close to the surface of fever tablet, one end of bimetal leaf connects moving contact, moving contact and fixed contact position relatively also can contact with the action of bimetal leaf or disconnect, wherein fever tablet is insulating material, pin, fixed contact, moving contact, bimetal leaf is electric conducting material, pin, heating resistor in fever tablet, fixed contact, moving contact, bimetal leaf is connected.
Adopt such structure, need the present invention's active heating type overtemperature protection system to connect with controlled utensil in use.When controlled utensil normally works, be normal electrical flow valuve in circuit, fever tablet is not generated heat, and moving contact contacts with fixed contact, circuit turn-on, and controlled utensil normally works; When controlled utensil increases because of current anomaly, also increased by the electric current of the heating resistor in fever tablet, fever tablet is generated heat, bimetal leaf is heated produce internal stress and rapidly action, disconnect the connection of moving contact and fixed contact, cut off circuit, controlled utensil no current passes through thus is protected, and avoids overheating fault; Because circuit is cut off, do not have electric current by heating resistor, heating resistor does not generate heat, fever tablet is lowered the temperature, and bimetal leaf also reduces thereupon temperature and resets, and moving contact is contacted with fixed contact, now circuit turn-on, electric current recovers, and controlled utensil can recover normal work.
Because bimetal leaf is not rely on controlled utensil to send out heat action thermogenetic passively, but adopt the fever tablet of connecting with controlled utensil initiatively to send out heat action thermogenetic, utilize the situation that the electric current occurred during controlled utensil operation irregularity increases, fever tablet and controlled utensil are generated heat simultaneously, after fever tablet heating, bimetal leaf is heated to produce internal stress and rapidly action cut off circuit, controlled utensil no current passes through, thus play superheat protecting function, avoid overheating fault, even controlled utensil there is current anomaly but heat up also do not reach abnormal temperature time overtemperature protection system just action, the overheated possibility being equivalent to have intelligent predicting potential also be protected in advance, adequately protected the safe operation of controlled utensil, thus also extend the useful life of controlled utensil.Meanwhile, fever tablet is just electrically connected with controlled utensil, does not need the surface being close to controlled utensil to install, therefore can be arranged on any position, and installation site even can, away from controlled utensil, therefore not by the spatial limitation of controlled utensil, be installed very convenient.
Accompanying drawing explanation
Fig. 1 is the front sectional view of a kind of active heating type of the present invention overtemperature protection system.
Fig. 2 is the vertical view of the bimetal leaf with moving contact in Fig. 1.
Fig. 3 is the vertical view of the fever tablet with pin, compressing tablet, fixed contact in Fig. 1.
Fig. 4 is the schematic diagram that the present invention is arranged on pcb board.
In accompanying drawing:
1 pin; 2 fever tablets; 3 heating resistors;
4 compressing tablets; 5 fixed contacts; 6 moving contacts;
7 bimetal leafs; 8 pcb boards.
Embodiment
Fig. 1 to Fig. 3 gives the specific embodiment of a kind of active heating type of the present invention overtemperature protection system, it is by fever tablet 2, pin 1, compressing tablet 4, bimetal leaf 7 forms, heating resistor 3 is had in fever tablet 2, pin 1 and compressing tablet 4 lay respectively at the two ends of fever tablet 2, pin 1 is electrically connected with heating resistor 3, fixed contact 5 to be positioned on compressing tablet 4 and to be electrically connected with heating resistor 3 by compressing tablet 4, bimetal leaf 7 some be close to the surface of fever tablet 2, one end that bimetal leaf 7 is corresponding with fixed contact 5 position has moving contact 6, moving contact 6 and fixed contact 5 position relatively also can contact with the action of bimetal leaf 7 or disconnect, thus closed or open circuit, wherein fever tablet 2 is ceramic insulating material, pin 1, compressing tablet 4 is conductive metal material, fixed contact 5, moving contact 6 is silver contact, pin 1, heating resistor 3 in fever tablet 2, compressing tablet 4, fixed contact 5, moving contact 6, bimetal leaf 7 is connected.
Fig. 4 be the present invention initiatively heating type overtemperature protection system be arranged on the schematic diagram on pcb board 8, during use, the present invention initiatively heating type overtemperature protection system be generally utilize pin 1, compressing tablet 4 is welded on pcb board 8, and connects with controlled utensil.When controlled utensil normally works, it is normal electrical flow valuve in circuit, fever tablet 2 is not generated heat substantially, moving contact 6 is positioned at fixed contact 5 position that contacts, now circuit is conducting, the heating resistor 3 of electric current in pin 1, fever tablet 2, compressing tablet 4, fixed contact 5, moving contact 6, bimetal leaf 7 are to controlled utensil, and controlled utensil normally works.It is overheated that controlled utensil occurs, general is all cause because electric current is excessive, such as when motor rotation blockage, electric current will sharply increase, when there is the situation that current anomaly increases in controlled utensil, also increased by the electric current of the heating resistor 3 in fever tablet 2 thereupon, fever tablet 2 is generated heat, due to bimetal leaf 7, some is close to the surface of fever tablet 2, bimetal leaf 7 is heated produce internal stress and rapidly action, disconnect the connection of moving contact 6 and fixed contact 5, cut off circuit, controlled utensil no current passes through thus is protected, and avoids overheating fault; Because circuit is cut off, now there is no electric current by heating resistor 3 yet, heating resistor 3 does not generate heat, and fever tablet 2 is lowered the temperature, bimetal leaf 7 also thereupon temperature reduce start reset, when fever tablet 2 cools to design temperature, bimetal leaf 7 also resets thereupon, moving contact 6 is contacted, now circuit turn-on with fixed contact 5, electric current recovers, and controlled utensil can recover normal work.
Described heating resistor 3; common resistance wire can be adopted; also semiconductor resistor, PTC or ceramic PTC can be adopted; when adopting PTC or ceramic PTC; because PTC thermistor is a kind of semiconductor resistor with temperature sensitivity; when exceeding Curie temperature; its resistance value along with the rising of temperature be increasing of step evolution; therefore when described heating resistor 3 adopts PTC; not only can make bimetal leaf 7 be heated action cut off circuit; significantly can also increase the resistance value in circuit, play metering function, thus there is double protection.
In this specific embodiment, fixed contact 5 is positioned on compressing tablet 4 and is electrically connected with heating resistor 3 by compressing tablet 4, and in fact fixed contact 5 can directly be electrically connected with heating resistor 3.
Not necessarily, because compressing tablet 4 has been the effect of fixing fever tablet 2, and fever tablet 2 can adopt other fixed form to be fixed to described compressing tablet 4.
The foregoing is only a specific embodiment of the present invention; not limiting the scope of the present invention; those skilled in the art is not departing from the spirit and scope of the present invention that claims limit; in the form and details to the many variations that the present invention makes, all fall into protection scope of the present invention.
Claims (5)
1. an active heating type overtemperature protection system, comprise pin (1), fixed contact (5), moving contact (6), bimetal leaf (7), it is characterized in that: it is also containing fever tablet (2), heating resistor (3) is had in fever tablet (2), pin (1), fixed contact (5) is electrically connected with heating resistor (3) respectively, bimetal leaf (7) is close to the surface of fever tablet (2), one end of bimetal leaf (7) connects moving contact (6), moving contact (6) and fixed contact (5) position relatively also can contact with the action of bimetal leaf (7) or disconnect, fever tablet (2) is insulating material, pin (1), fixed contact (5), moving contact (6), bimetal leaf (7) is electric conducting material, pin (1), heating resistor (3) in fever tablet (2), fixed contact (5), moving contact (6), bimetal leaf (7) is connected.
2. a kind of initiatively heating type overtemperature protection system according to claim 1; it is characterized in that: it is also containing compressing tablet (4); described fixed contact (5) is positioned at compressing tablet (4) and goes up and pass through compressing tablet (4) and be electrically connected with heating resistor (3), and compressing tablet (4) is conductive metal material.
3. a kind of initiatively heating type overtemperature protection system according to claim 1 and 2, is characterized in that: described heating resistor (3) is PTC.
4. a kind of initiatively heating type overtemperature protection system according to claim 1 and 2, is characterized in that: described heating resistor (3) is ceramic PTC.
5. a kind of initiatively heating type overtemperature protection system according to claim 1 and 2, is characterized in that: described fixed contact (5), moving contact (6) are silver contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510277544.7A CN104851744A (en) | 2015-05-27 | 2015-05-27 | Active heating-type overheating protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510277544.7A CN104851744A (en) | 2015-05-27 | 2015-05-27 | Active heating-type overheating protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104851744A true CN104851744A (en) | 2015-08-19 |
Family
ID=53851312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510277544.7A Pending CN104851744A (en) | 2015-05-27 | 2015-05-27 | Active heating-type overheating protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104851744A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108520848A (en) * | 2018-06-11 | 2018-09-11 | 佛山市高明欧电子制造有限公司 | A kind of long-range current temperature controller |
| CN108615656A (en) * | 2018-06-11 | 2018-10-02 | 佛山市高明欧电子制造有限公司 | A kind of long-range current temperature controller of anti-low temperature turn on automatically |
| CN113572128A (en) * | 2021-08-11 | 2021-10-29 | 上海维安电子有限公司 | An integrated protection element for overheating and overcurrent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6346796B1 (en) * | 1999-06-25 | 2002-02-12 | Uchiya Thermostat Co., Ltd. | Thermal shut-off device and battery pack |
| CN101197480A (en) * | 2007-12-14 | 2008-06-11 | 深大宇电器(深圳)有限公司 | Plug |
| CN201122558Y (en) * | 2007-08-17 | 2008-09-24 | 森萨塔科技公司 | Temperature current protector |
| CN204596712U (en) * | 2015-05-27 | 2015-08-26 | 福建闽航电子有限公司 | A kind of initiatively heating type overtemperature protection system |
-
2015
- 2015-05-27 CN CN201510277544.7A patent/CN104851744A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6346796B1 (en) * | 1999-06-25 | 2002-02-12 | Uchiya Thermostat Co., Ltd. | Thermal shut-off device and battery pack |
| CN201122558Y (en) * | 2007-08-17 | 2008-09-24 | 森萨塔科技公司 | Temperature current protector |
| CN101197480A (en) * | 2007-12-14 | 2008-06-11 | 深大宇电器(深圳)有限公司 | Plug |
| CN204596712U (en) * | 2015-05-27 | 2015-08-26 | 福建闽航电子有限公司 | A kind of initiatively heating type overtemperature protection system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108520848A (en) * | 2018-06-11 | 2018-09-11 | 佛山市高明欧电子制造有限公司 | A kind of long-range current temperature controller |
| CN108615656A (en) * | 2018-06-11 | 2018-10-02 | 佛山市高明欧电子制造有限公司 | A kind of long-range current temperature controller of anti-low temperature turn on automatically |
| CN108615656B (en) * | 2018-06-11 | 2023-09-01 | 佛山市高明欧一电子制造有限公司 | Automatic switch-on remote current temperature controller of low temperature prevention |
| CN108520848B (en) * | 2018-06-11 | 2023-09-01 | 佛山市高明欧一电子制造有限公司 | Remote current temperature controller |
| CN113572128A (en) * | 2021-08-11 | 2021-10-29 | 上海维安电子有限公司 | An integrated protection element for overheating and overcurrent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150819 |
|
| RJ01 | Rejection of invention patent application after publication |