CN2420785Y - Automatic control switch for electric heating blanket temperature with light-change indication - Google Patents
Automatic control switch for electric heating blanket temperature with light-change indication Download PDFInfo
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- CN2420785Y CN2420785Y CN 00211316 CN00211316U CN2420785Y CN 2420785 Y CN2420785 Y CN 2420785Y CN 00211316 CN00211316 CN 00211316 CN 00211316 U CN00211316 U CN 00211316U CN 2420785 Y CN2420785 Y CN 2420785Y
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Abstract
The utility model discloses a temperature automatic control switch with variable light indication for electric heating blankets, which comprises a temperature adjusting circuit and an indicating circuit, wherein, the temperature adjusting circuit is connected in series into one power supply conducting wire. The utility model is characterized in that the indicating circuit is composed of luminous diodes which are mutually connected in parallel and are connected in series into the other power supply conducting wire and the matching electric resistances thereof; the resistance values of the matching electric resistances are equal to 1 percent of the resistance value of an electric heating wire of an electric heating blanket. Compared with the prior art, the utility model has the advantages of simple structure, low cost, good indicating effect, etc.
Description
The utility model relates to the electric blanket temperature autocontrol switch, exactly is a kind of electric blanket temperature autocontrol switch that becomes the light indication that has.
Patent No. ZL93207672.6 utility model patent technology discloses a kind of " electric blanket temperature autocontrol switch ", and the Circuits System of this product mainly comprises thermoregulation circuit, indicating circuit two parts.Wherein, indicating circuit is made of two element circuits, the one, the on/off indicating circuit, the 2nd, temperature indicator circuit, the former is made up of light-emitting diode that is parallel to the mutual series connection between the Circuits System power input lead and adapted resistance thereof, and the latter then is made of the light-emitting diode and the adapted resistance thereof of the mutual series connection between the power output end lead that is connected in parallel on this system.The power input of Circuits System links by double on and off switch and attaching plug and external power source, and the heating wire of output and electric blanket links.After this product is realized,, has better practicability between 0～40 ℃ though it can make the heating-up temperature of electric blanket adjust arbitrarily.But, because the double on and off switch of this product is that two branches are arranged with the potentiometer that is arranged in the thermoregulation circuit, relatively independent parts, so it exists volume big again unavoidably, the problem that cost is high.At its deficiency, people are again with a kind of compact conformation, the cheap potentiometer that has the single-pass single-break switch is introduced this product, in order to substitute the double on and off switch and the potentiometer of patented product, though the relative patented product of the product after the improvement has certain progress, it is not enough that but it also still exists: 1, the structure more complicated of indicating circuit, and cost is also higher; 2, whether indicating circuit only can work to electric blanket and make indication, and can not make indication to electric blanket heating-up temperature changing condition, so indicating effect is directly perceived inadequately; When 3, the heating wire of electric blanket opened circuit, the light-emitting component in the on/off indicating circuit was still bright, and this just makes the user produce electric blanket also in the mistake feel of operate as normal easily, is unfavorable in time finding fault, the influence heating.
The purpose of this utility model is for people provide a kind of electric blanket temperature autocontrol switch that becomes the light indication that has, so that overcome the deficiencies in the prior art.
The purpose of this utility model is to realize like this, it comprises thermoregulation circuit, indicating circuit, thermoregulation circuit is serially connected with on the power lead, be characterized in that indicating circuit is made up of the light-emitting diode parallel with one another and the adapted resistance thereof that are serially connected with on another root power lead, the resistance of this resistance equal electric blanket the heating wire resistance 1%.
Be connected in series fuse in the above-mentioned power lead.
The utility model compared with prior art has the following advantages after realizing: 1, indicating circuit only is made of a light-emitting diode and a resistance, so its simple structure, cost of manufacture is low; 2, light-emitting component brightness changes with the electric blanket heating-up temperature, so its indicating effect is directly perceived, uses more convenient; 3, when heating wire generation open circuit fault, the light-emitting component of indicating circuit just can not starter, in time finds and gets rid of fault thereby help the user; 4, the utility model is provided with fuse, can prevent that dangerous phenomenons such as sparking from appearring in heating wire under short-circuit condition, help guaranteeing safe in utilization.
Below in conjunction with accompanying drawing embodiment of the present utility model is done explanation in further detail.
Fig. 1 is a contour structures schematic diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
As seen from the figure, the utility model is mainly by housing 3, Circuits System two parts component.Wherein, be shaped on turn-knob 2 installing holes and light-emitting diode D1 inspection hole on the leading flank of housing, and on the surface of shell of described installing hole left side, make temperature reference symbol 1.Circuits System is by power lead and plug, and mains switch K is arranged at thermoregulation circuit, indicating circuit, short-circuit protection composition on the circuit board.Thermoregulation circuit is serially connected with on the power lead A, and its make is the same with prior art, also is by inductance coil L, resistance R, potentiometer W, and bidirectional triode thyristor G, bidirectional trigger diode D, capacitor C connection form.Inductance coil L is serially connected on the lead A, resistance R is in parallel with potentiometer W, an one contact B connects with the anode of inductance coil L, bidirectional triode thyristor G respectively, another contact E connects with bidirectional trigger diode D, capacitor C one end respectively, the trigger electrode of bidirectional triode thyristor G connects with the other end F of bidirectional trigger diode, and the negative electrode of bidirectional triode thyristor connects with the other end H of capacitor C.Indicating circuit is by the light-emitting diode D parallel with one another between J, the N point that is serially connected with on another root power lead P
1And adapted resistance R
1Form, and make resistance R
1Resistance be electric blanket the heating wire resistance 1%.In the present embodiment, resistance R
1Make by one section heating wire, and make its length equal 1% of heating wire length; Short-circuit protection is made of fuse Z; this fuse is serially connected on the power lead A between K switch and the inductance coil L, and it can be cut off the electricity supply when heating wire is short-circuited fault automatically; prevent the heating wire down work of nonserviceabling, avoid peril such as fire to take place.Certainly, when fuse not being set, the utility model also can use; In the present embodiment, the break-make control assembly of mains switch K and the operation control part part of potentiometer slider 5 are made of a bar shape knob 2, are shaped on the temperature groove on this knob diagram left end cylindrical.
During assembling, turn-knob 2, light-emitting diode D
1Respectively from the housing front side and on expose in the described installing hole, inspection hole made.
During use, the input of power lead A, the P of foregoing circuit system links by K switch and attaching plug and external power source, and output H, N connect with the heating wire two ends of electric blanket 4 respectively.
Operation principle of the present utility model is: the voltage U on the capacitor C
CTo lag behind phase angle of input voltage U.Use U
CRemove to control bidirectional triode thyristor G and trigger bidirectional trigger diode D, remove to trigger bidirectional triode thyristor G by D again, to guarantee the two-way all conductings of controllable silicon.When the numerical value of potentiometer W less, phase angle φ hour, then the bidirectional triode thyristor G angle of flow is big, the electric current that flows through electric blanket is just big, temperature is just high; Otherwise, when the numerical value that strengthens potentiometer W, when phase angle φ is big, then the bidirectional triode thyristor G angle of flow is little, the electric current that flows through is just little, temperature reduces (more than be under the constant situation of capacitor C) so the resistance by regulator potentiometer W just can be regulated the power of electric blanket smoothly continuously, thereby can obtain the variation of electric blanket temperature in 0～40 ° of scope.
The relation of capacitor C and potentiometer W is complementary, because the two ends at W and C all are added with voltage, with since control trigger, beginning, this voltage charges to C through W, when in case the charging voltage on the electric capacity reaches the silicon controlled trigger voltage, the controllable silicon conducting, this moment, capacitor C was discharged rapidly, controllable silicon turn-offs naturally, as seen whether the silicon controlled conducting, depend on whether capacitor C has trigger voltage, and the speed of conducting was directly proportional with the capacitor C charging interval, after capacitance is determined, as long as change potentiometer W, just can change the charge constant of capacitor C, thus the size of the control angle of flow.The change of the angle of flow makes the voltage at load two ends also produce corresponding variation, reaches the purpose that bearing power is adjusted in control, and resistance R is in parallel with potentiometer W, plays the effect of a stable equilibrium, and inductance coil L is anti-interference.
When the Circuits System output end voltage changed between 0～220V, the both end voltage of indicating circuit just changed between 0～2.2V, caused light-emitting diode D
1Brightness dark bright variation takes place, play the temperature indicative function.
Claims (2)
1, the electric blanket temperature autocontrol switch that becomes the light indication is arranged, comprise thermoregulation circuit, indicating circuit, thermoregulation circuit is serially connected with in the power lead, it is characterized in that indicating circuit is made up of the light-emitting diode parallel with one another and the adapted resistance thereof that are serially connected with in another root power lead, this resistance equal electric blanket the heating wire resistance 1%.
2, the electric blanket temperature autocontrol switch that the indication of change light is arranged according to claim 1 is characterized in that being connected in series fuse in the described lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00211316 CN2420785Y (en) | 2000-04-03 | 2000-04-03 | Automatic control switch for electric heating blanket temperature with light-change indication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00211316 CN2420785Y (en) | 2000-04-03 | 2000-04-03 | Automatic control switch for electric heating blanket temperature with light-change indication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2420785Y true CN2420785Y (en) | 2001-02-21 |
Family
ID=33578032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00211316 Expired - Fee Related CN2420785Y (en) | 2000-04-03 | 2000-04-03 | Automatic control switch for electric heating blanket temperature with light-change indication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2420785Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645755A (en) * | 2013-12-26 | 2014-03-19 | 黄宇嵩 | Stepless electric blanket temperature control device |
| CN103699150A (en) * | 2013-12-28 | 2014-04-02 | 吴建堂 | Electric blanket six-level temperature control switch |
| CN106604426A (en) * | 2017-01-02 | 2017-04-26 | 赵祎 | Electric blanket and heat wire open circuit checking device |
| CN110139403A (en) * | 2019-06-10 | 2019-08-16 | 黄月华 | Safe and reliable temperature adjusting switch for electric blanket |
-
2000
- 2000-04-03 CN CN 00211316 patent/CN2420785Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645755A (en) * | 2013-12-26 | 2014-03-19 | 黄宇嵩 | Stepless electric blanket temperature control device |
| CN103699150A (en) * | 2013-12-28 | 2014-04-02 | 吴建堂 | Electric blanket six-level temperature control switch |
| CN106604426A (en) * | 2017-01-02 | 2017-04-26 | 赵祎 | Electric blanket and heat wire open circuit checking device |
| CN106604426B (en) * | 2017-01-02 | 2019-11-29 | 赵祎 | A kind of electric blanket and its heating wire disconnection detection device |
| CN110139403A (en) * | 2019-06-10 | 2019-08-16 | 黄月华 | Safe and reliable temperature adjusting switch for electric blanket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |