CN2457706Y - Safety pressure sensitive resistor - Google Patents
Safety pressure sensitive resistor Download PDFInfo
- Publication number
- CN2457706Y CN2457706Y CN 00237913 CN00237913U CN2457706Y CN 2457706 Y CN2457706 Y CN 2457706Y CN 00237913 CN00237913 CN 00237913 CN 00237913 U CN00237913 U CN 00237913U CN 2457706 Y CN2457706 Y CN 2457706Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- piezo
- pressure sensitive
- sensitive resistor
- temperature protection
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a safety pressure sensitive resistor, comprising a pressure sensitive resistor (R< V >). The utility model is characterized in that a temperature fuse (F< W >) which can carry out heat conduction with the pressure sensitive resistor is arranged beside the pressure sensitive resistor; the pressure sensitive resistor (R< V >) and the temperature fuse (F< W >) are mutually insulated to be sealed in the same casing (1) with heat conduction medium (2); the end heads of the pressure sensitive resistor and the temperature fuse extend out of the casing. After an overvoltage protective circuit adopts the safety pressure sensitive resistor, the overvoltage protective circuit can supply protection for overvoltage, and can automatically switch off a power supply when the temperature of the pressure sensitive resistor rises, which leads the overvoltage protective circuit to supply protection for temperature, which can prevent fire disasters from happening.
Description
The utility model belongs to a kind of piezo-resistance that is used for overvoltage protection.
When piezo-resistance is used for overvoltage protection, its circuit connection as shown in Figure 1: when being applied to piezo-resistance R
vThe voltage at two ends is lower than standard voltage value V
MarkThe time, resistance is high-impedance state, and when the both end voltage value of being above standard, pressure-sensitive electricity value is low resistive state, and sharply the electric current of increase can fuse and be connected on fuse F in the circuit
s, cut off the electricity supply.The spike interference signal that energy is little then can be absorbed by piezo-resistance.The problem that this piezo-resistance exists is: near voltage is in critical standard voltage value or when running into the bigger interference signal of energy, the electric current by piezo-resistance also is not enough to burn insurance F
s, but the increase of electric current can make resistance heat up, if the absorbed power of piezo-resistance is during greater than rated value, temperature can rise to more than 300 ℃ sometimes, even produces flame and cause fire.Much be exactly to adopt piezo-resistance excess voltage protection shown in Figure 1 at present on household electrical appliance such as air-conditioning, existing because of above-mentioned former resulting fire.
The utility model aims to provide and a kind ofly can prevent piezo-resistance safe type piezoresistor on fire in the excess voltage protection.
The technical scheme that realizes above-mentioned purpose is (referring to implementing illustration): the utility model comprises piezo-resistance (R
v), it is characterized in that: also be provided with and can carry out heat conducting Temperature protection (F with piezo-resistance on the piezo-resistance next door
w), piezo-resistance (R
v) and Temperature protection (F
w) with heat-conduction medium (2) mutually insulated be encapsulated in the same housing (1), stretch out outside the housing termination of piezo-resistance and Temperature protection.
Operation principle of the present utility model is: intrinsic safety holotype piezo-resistance is inserted band insurance (F by the mode of connection shown in Figure 7
s) power circuit: the Temperature protection (F that is about to be located at the piezo-resistance next door
w) be connected in the power circuit.As the voltage value of being above standard (V
Mark) time, be the piezo-resistance (R of low resistance
v) electric current sharply increases, and makes insurance (F
s) fusing, play the overvoltage protection effect: and because of voltage is in critical normal voltage or because of other power supply disturbs the piezo-resistance temperature is raise, but can not cause electric current insurance (F
s) under the situation of fusing, place the Temperature protection (F on piezo-resistance next door
w) will heat up because of heat conduction, be fusible in case reach the temperature of setting, cut off the electricity supply, play the temperature effect of protection automatically.
The function of overvoltage protection both can have been arranged after the overvoltage crowbar employing intrinsic safety holotype piezo-resistance, can under the situation that the piezo-resistance temperature raises, cut off the electricity supply automatically again, and have the function of temperature protection, thereby prevent the generation of fire.The utility model is with piezo-resistance R
vWith Temperature protection F
wBe encapsulated in and help heat conduction in the housing on the one hand, housing can also play the piezo-resistance that makes heating and the protective effect of Temperature protection and external isolation on the other hand.
Description of drawings:
Fig. 1, prior art piezo-resistance overvoltage crowbar schematic diagram
Fig. 2, the utility model embodiment 1 structural representation
The E of Fig. 3, Fig. 2 is to view
The termination electrical connection graph of Fig. 4, embodiment 1
Fig. 5, the utility model embodiment 2 structural representations
The termination electrical connection graph of Fig. 6, embodiment 2
The overvoltage crowbar figure of Fig. 7, employing the utility model safe type piezoresistor
The drawing reference numeral explanation:
F
s-electric current insurance R
v-piezo-resistance F
w-Temperature protection
1-housing 2-heat-conduction medium
Embodiment 1:
The piezo-resistance R that this is routine
vWith Temperature protection F
wBy epoxy encapsulation in same housing 1, piezo-resistance R
vTwo end A, B and Temperature protection F
wTwo termination C, D stretch out housing 1 respectively.
Fig. 7 is used for the winding diagram of excess voltage protection for present embodiment, outside housing a termination C of termination B of piezo-resistance and Temperature protection is linked together and makes circuit output end with piezo-resistance other end A, and the A end of piezo-resistance is simultaneously by insurance F
sConnect power supply, Temperature protection F
wOther end D connect power supply.The Temperature protection that is about to be located at the piezo-resistance next door is like this connected into power circuit.
Embodiment 2:
This routine piezo-resistance R
vTermination B and Temperature protection F
wA termination C stretch out housing after in housing, being electrically connected, piezo-resistance other end A, Temperature protection other end D stretch out housing respectively.
This routine Temperature protection and piezo-resistance are electrically connected in housing, just need not go during use to have connected again, and this link can directly be made a circuit output end.
Heat-conduction medium in the utility model housing can be an epoxy resin etc., also can be air.
Claims (3)
1, safe type piezoresistor comprises piezo-resistance (R
v), it is characterized in that: also be provided with and can carry out heat conducting Temperature protection (F with piezo-resistance on the piezo-resistance next door
w), piezo-resistance (R
v) and Temperature protection (F
w) with heat-conduction medium (2) mutually insulated be encapsulated in the same housing (1), housing is stretched out in the termination of piezo-resistance and Temperature protection.
2, safe type piezoresistor according to claim 1 is characterized in that: two terminations (C), (D) of two terminations (A), (B) and the Temperature protection of described piezo-resistance stretch out housing respectively.
3, safe type piezoresistor according to claim 1 is characterized in that: described piezo-resistance (R
v) a termination (B) and Temperature protection (F
w) a termination (C) stretch out housing after in housing, being electrically connected, the other end of piezo-resistance and Temperature protection (A), (D) stretch out housing respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00237913 CN2457706Y (en) | 2000-08-11 | 2000-08-11 | Safety pressure sensitive resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00237913 CN2457706Y (en) | 2000-08-11 | 2000-08-11 | Safety pressure sensitive resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2457706Y true CN2457706Y (en) | 2001-10-31 |
Family
ID=33599074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00237913 Expired - Lifetime CN2457706Y (en) | 2000-08-11 | 2000-08-11 | Safety pressure sensitive resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2457706Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9355763B2 (en) | 2007-06-13 | 2016-05-31 | Zhonghou Xu | Electronic protection component |
-
2000
- 2000-08-11 CN CN 00237913 patent/CN2457706Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9355763B2 (en) | 2007-06-13 | 2016-05-31 | Zhonghou Xu | Electronic protection component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDONG CHIGO AIR CONDITIONING CO., LTD. Free format text: FORMER NAME OR ADDRESS: ZHIGAO AIR CONDITIONER CO., LTD,. GUANGDONG |
|
| CP03 | Change of name, title or address |
Address after: Shengli Industrial Zone, Lishui Town, Nanhai District, Foshan, Guangdong Patentee after: Zhigao Air Conditioner Co., Ltd., Guangdong Prov. Address before: Guangdong Nanhai Lishui Town, Feng Gang Road, Guangdong Chigo Air Conditioning Co., Ltd., Liu Yan Patentee before: Guangdong Chigo Air-Coditioning Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20011031 |