CN2696257Y - Safety electric blanket with device for preventing fire - Google Patents
Safety electric blanket with device for preventing fire Download PDFInfo
- Publication number
- CN2696257Y CN2696257Y CN 200420034432 CN200420034432U CN2696257Y CN 2696257 Y CN2696257 Y CN 2696257Y CN 200420034432 CN200420034432 CN 200420034432 CN 200420034432 U CN200420034432 U CN 200420034432U CN 2696257 Y CN2696257 Y CN 2696257Y
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- CN
- China
- Prior art keywords
- controller
- electric blanket
- blanket
- conductor
- inner conductor
- 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 - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims abstract description 50
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 11
- 238000005485 electric heating Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000004033 plastic Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Control Of Resistance Heating (AREA)
- Resistance Heating (AREA)
Abstract
The utility model provides a safety electric blanket with a device for preventing fire, comprising a blanket body, bilayer conductor helix heating lines uniformly distributed in the blanket body and a controller connected with the heating lines. After the outer conductor of the bilayer conductor helix is connected with an inner conductor in series, a loop can be formed. The controller is provided with an over temperature power-down protection circuit composed of a current fuse. The other end of the outer conductor is connected with the output end of the power supply switch of the controller. The other end of the inner conductor is connected with the output end of the over temperature power-down protection circuit of the controller. The safety electric blanket with a device for preventing fire can realize the full line temperature detection, and over temperature power off protection to avoid the high temperature of the electric blanket; the unexpected accident, such as the fire can be avoided when the electric blanket is used undeservedly; the safety electric blanket with a device for preventing fire has easy manufacturing and high reliability.
Description
Relate to the field:
The utility model relates to the flexible warming appliance of a kind of bedroom in the household appliance technical field.Be particularly related to be a kind of have effectively prevent safe electric heating blanket on fire.
Background technology:
Electric blanket is gone up warming appliance as a kind of bed of popular style, is accepted by increasing people.But use electric blanket if improper operating mode can produce localized hyperthermia usually, damage the appearance insulation of heating line and cause and the danger of electric shock when reaching the fusion temperature of blanket body (generally constituting), will cause fire incident by chemical fibre.
The existing electric blanket that is called safety-type constitutes by the blanket body that is evenly equipped with double-layer conductor spiral heating line with controller that the heating line joins.Four exits of the inner conductor of double-layer conductor spiral heating line and outer contact are connected with two safeguard protection ends with two power take-offs of controller respectively.Its safety protective circuit is formed temperature detecting unit by Resistor-Capacitor Units such as transistors, removes to control controllable silicon after temperature signal being amplified again.When electric blanket under abnormal high temperature, the leakage current that its safeguard protection depends on plastic layer between inner conductor and the outer contact increases, and this leakage current is amplified rear drive controller controllable silicon, to realize power cutoff.The shortcoming of this electric blanket is to require the requirement on machining accuracy of plastic layer between inner conductor and the outer contact very high, to guarantee the consistency of safeguard protection temperature; The control circuit complexity, electronic devices and components are more, and its reliability reduces.For example, be difficult to plastic layer between inner conductor and the outer contact is accomplished very high precision, can cause safeguard protection temperature discreteness bigger like this, when this temperature is on the low side even can influence the operate as normal of electric blanket according to existing technological level; When temperature is too high, can cause the fusing burning of fabric of electric heat blanket; In addition, if certain electronic component of the safety protective circuit of controller is because faults itself can make the overtemperature prote circuit malfunction, thereby cause the generation of fire incident.Therefore, in fact its fail safe is not high for this electric blanket.
Summary of the invention:
The purpose of this utility model is a kind of safe electric heating blanket of design.This electric blanket can be realized completely road temperature detection, overtemperature power-off protection, to avoid the generation of electric blanket high temperature, guarantees that it avoids causing such as contingencies such as fires when improper use.It has overcome the defective that above-mentioned safety electric blanket is difficult to process, reliability is not high.
The technical solution of the utility model has reached above-mentioned purpose fully.This electric blanket by the blanket body, be evenly arranged in the double-layer conductor spiral heating line in the blanket body and be connected in the heating line controller form, double-layer conductor spiral heating line is made of inner conductor, outer contact and the low melting point nylon melting layer (hereinafter to be referred as melting layer) that is located between the ectonexine conductor, and this melting layer insulate.Feature of the present utility model is to constitute the loop that is connected in series after described outer contact is connected with inner conductor; described controller has an overtemperature power-off protecting circuit of being made up of current fuse; the other end of outer contact is connected with the mains switch output of controller, and the other end of inner conductor is connected to controller overtemperature power-off protecting circuit output.
The operation principle of intrinsic safety holotype electric blanket is as follows:
Alternating current is input to inner conductor and the outer contact that double-layer conductor spiral heating line is connected in series by controller two exits during operate as normal, and wherein a utmost point of alternating current will be applied to the outer contact or the inner conductor of double-layer conductor spiral heating line again by the overtemperature power-off protecting circuit.Alternating current constitutes the loop between inner conductor and outer contact like this, just has running current to flow through to make the electric blanket work of normally generating heat in the loop.At this moment by the normal current of the heating current in the overtemperature power-off protecting circuit for allowing.
When electric blanket because abnormal high temperature appears in non-normal working,, inner conductor and outer contact are short-circuited, impedance loop reduces, and flows through at this moment in the controller that the electric current of current fuse increases in the overtemperature power-off protecting circuit.When this electric current increases to the current fuse blowout current, current fuse fusing, inner conductor and outer contact lose heating current, and electric blanket stops heating.Thereby the security incident of the person and property such as avoided electric shock, catch fire realizes safeguard protection.
The utility model has the advantages that and realized road real-time online temperature detection completely, automatic power-off protection when overheating problem takes place; And control circuit is simple, the reliability height; Because being the melting layer that relies between inner conductor and the outer contact, the safeguard protection principle melts and short circuit; its temperature that realizes safeguard protection is only relevant with the melting layer material; irrelevant with the machining accuracy of melting layer; protect the consistency of positive safeguard protection temperature, guaranteed that reliably electric blanket avoids causing such as contingencies such as fires when improper use.
Below in conjunction with accompanying drawing the utility model is described further.
Description of drawings:
Fig. 1 is a structure chart of the present utility model.
Fig. 2 is control circuit figure of the present utility model.
Specific embodiment:
Referring to Fig. 1～2; this electric blanket is by blanket body 1; the double-layer conductor spiral heating line 2 that is evenly arranged in the blanket body 1 is formed with the controller 6 that is connected in the heating line; double-layer conductor spiral heating line 2 is by inner conductor 7; outer contact 8 and be located at inner conductor and outer contact between low-melting insulation molten plastic layer 9 constitute; the outer contact 8 and the inner conductor 7 of described double-layer conductor spiral heating line 2 one ends are connected in series; described controller 6 has an overtemperature power-off protecting circuit of being made up of current fuse BX, and the inner conductor 7 of double-layer conductor spiral heating line 2 other ends is connected with controller 6 high power outputs; outer contact 8 is connected with controller 6 overtemperature power-off protecting circuit outputs.Blanket body 1 and be evenly arranged in double-layer conductor spiral heating line 2 in the blanket body 1 and all continue to use prior art and constitute wherein.5 is the inner conductor leading-out terminal among the figure, and 3 outer contact leading-out terminals are connected with the output of controller 6 respectively by two core connecting lines 4.Fig. 2 has provided the control circuit figure of this controller.The same with existing controller, K is the DPTT double-pole triple throw switch, forms mains switch and power conditioning circuitry, and R, NB consist of the power supply indicator circuit.But this controller 6 has increased the overtemperature power-off protecting circuit of being made up of current fuse BX.RL is a double-layer conductor spiral heating line, and inner conductor 7 at one end is connected in series with outer contact 8.
When K is closed to the high power end, flow through electric current in inner conductor 7 and the outer contact 8, electric blanket is in heated condition.For a certain reason, as the electric blanket inner conductor fracture of wire sparking appears or abnormality such as electric blanket is folding, fold, external heat source place on the electric blanket, conduction time is long under when causing local anomaly high temperature to the melting point of double-layer conductor spiral heating line 2 melting layers, inner conductor 7 is short-circuited with outer contact 8 and contacts, inner conductor 7 reduces with the resistance that outer contact 8 is connected, and loop current increases.When being increased to the blowout current of current fuse BX, the total loop power path has been cut off in current fuse fusing, has realized safeguard protection.The effect of D1, D2 is when electric blanket is in low-grade work among Fig. 2, only makes the power supply positive half cycle current flow through double-layer conductor spiral heating line 2, thereby regulates the output of electric blanket power easily.
Claims (1)
1; a kind of safe electric heating blanket of catching fire of preventing; by the blanket body; the double-layer conductor spiral heating line that is evenly arranged in the blanket body is formed with the controller that is connected in the heating line; double-layer conductor spiral heating line is by inner conductor; outer contact and the low melting point nylon melting layer that is located between the ectonexine conductor constitute; it is characterized in that described outer contact is connected the back and constitutes the loop that is connected in series with inner conductor; described controller has an overtemperature power-off protecting circuit of being made up of current fuse; the other end of outer contact is connected with the mains switch output of controller, and the other end of inner conductor is connected to controller overtemperature power-off protecting circuit output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034432 CN2696257Y (en) | 2004-04-21 | 2004-04-21 | Safety electric blanket with device for preventing fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034432 CN2696257Y (en) | 2004-04-21 | 2004-04-21 | Safety electric blanket with device for preventing fire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2696257Y true CN2696257Y (en) | 2005-04-27 |
Family
ID=34773010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420034432 Expired - Fee Related CN2696257Y (en) | 2004-04-21 | 2004-04-21 | Safety electric blanket with device for preventing fire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2696257Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802288A (en) * | 2011-05-25 | 2012-11-28 | 王清传 | Safety control structure for heating wires |
-
2004
- 2004-04-21 CN CN 200420034432 patent/CN2696257Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802288A (en) * | 2011-05-25 | 2012-11-28 | 王清传 | Safety control structure for heating wires |
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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 | ||
| CP03 | Change of name, title or address |
Patentee address after: Chengdu City, Sichuan province 610045 Wuhou Avenue along the River No. 73 Patentee address before: 610061, No. six, south section of Ring Road, Sichuan, Chengdu |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050427 Termination date: 20120421 |