CN2053830U - Switch of electrothermal blanket with automatic electronic temp. controlling - Google Patents
Switch of electrothermal blanket with automatic electronic temp. controlling Download PDFInfo
- Publication number
- CN2053830U CN2053830U CN 89210400 CN89210400U CN2053830U CN 2053830 U CN2053830 U CN 2053830U CN 89210400 CN89210400 CN 89210400 CN 89210400 U CN89210400 U CN 89210400U CN 2053830 U CN2053830 U CN 2053830U
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- China
- Prior art keywords
- switch
- temperature
- electric blanket
- resistance
- capacitor
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- Control Of Resistance Heating (AREA)
- Control Of Temperature (AREA)
Abstract
The utility model relates to a switch of electrothermal blanket with automatic electronic temperature controlling. The utility model comprises a temperature detecting element arranged in an electric blanket, a temperature selected element arranged on a switch box, a trigger element, a switching element, etc. The elements and the electric blanket form a complete closed loop temperature controlling system, and according to the requirements of the user, the range of the constant temperature of the electric blanket can be arranged between 30 DEG C and 50 DEG C by regulating the temperature selected element arranged on the switch box. The utility model has the advantages of non-interference, high precision, low cost and simple structure.
Description
The utility model belongs to temp control switch.
Current electric blanket switch has two kinds: a kind of is high low-temperature, a kind of is the stepless temperature regulating formula, the operation principle of high low-temperature switch allows power supply directly connect with heater strip when being the high temperature gear, in power supply and heater strip loop, be connected in series a rectifier diode during low temperature gear, half cycle of alternating current is pruned, thereby reduce the heating power of electric blanket, the operation principle of stepless temperature regulating switch (Guangxi realize that state produce) is: be close at bimetal leaf a little heater strip is set, control the size of current of this little heater strip, just controlled the logical of bimetal leaf power contact switch, break time length, thereby also just controlled the size of electric blanket heating power (average power), these two kinds of switches, the former heating power has only two retainings to select and can not change, though the latter's heating power can be selected arbitrarily.But not automatically, just adjust that if the people falls asleep, just can't adjust, obviously this is very inconvenient to the user by the human body sensory electric blanket temperature.
The new purpose of this practicality just provides a kind of on-off thermostat, this switch not only can make temperature any place between 30 ℃-50 ℃ of electric blanket constant, the constant temperature precision is not more than ± and 4 ℃, and have noiseless, economize on electricity, low, the characteristic of simple structure of cost.
Temperature controlled processes of the present utility model is realized by electronic component entirely, carry out temperature automatically controlled a lot of application examples that have with electronic component, belong to known technology, but be used for temperature automatically controlled necessary these several problems that solve on the electric blanket, at first be to adopt element to lack, cost must very low (generally about several yuans), otherwise do not have practicality.Secondly, element heating is very little, and generally below 0.6W, otherwise switch enclosure holds and can't stand.Once more, must be noiseless, can not impact household electrical appliance such as broadcast receiver, television sets, the utility model solves these problems.
Automatic temperature control circuit of the present utility model is by detector unit, temperature is selected element, triggering element and switch element constitutes, detector unit places in the electric blanket, temperature is selected element, triggering element and switch element places in the switch enclosure, detecting element and the element of heater strip in switch enclosure in the electric blanket constitute a complete closed loop thermal control system, select the needed temperature of good user as long as select element during use with the temperature on the switch enclosure, the selected temperature of user will be in dozens of minutes be adjusted to the temperature of electric blanket by this switch, and keeps this temperature-resistant.
Fig. 1 is the utility model automatic temperature control circuit enforcement figure, is described further below in conjunction with circuit diagram.
Among Fig. 1: R
tBe detector unit, be negative tempperature coefficient thermistor; W is the selected element of temperature, is variable potentiometer; R
1Be supplying resistance, it and detecting element R
tThe selected element W of temperature constitutes a brachium pontis of balanced bridge, T together
1Be to trigger element, be the positive-negative-positive triode.R
2, R
3Another arm resistance for balanced bridge; T
2Be that switch element is a bidirectional triode thyristor; C is that switch element is a capacitor; R
5It is the switch element current-limiting resistance; R
4It is supplying resistance; D prevents the oppositely diode of triggering; R
LIt is the electric blanket heater strip.
During work, at first with the working temperature of the selected electric blanket of the selected element of temperature, if the actual temperature of energising back electric blanket is lower than selected temperature, then because the effect of balanced bridge, trigger triode T
1End controllable silicon T
2Just conducting, the electric blanket heating, when the temperature of electric blanket was higher than chosen temperature, balanced bridge made trigger triode T again
1Conducting, and impel controllable silicon to turn-off, electric blanket stops heating, and behind natural heat dissipation after a while, when electric blanket temperature was lower than selected temperature again, balanced bridge impelled trigger triode T again
1End controllable silicon T
2Conducting again, electric blanket begin heating again, repeat this process later on periodically, if the user selectes the electric blanket working temperature again with the selected element of temperature, then this circuit will make electric blanket constant on new chosen temperature.
What stress here is that the circuit that switch element is formed has important function---" self-locking " function, for the purpose of understanding, circuit diagram 1 is simplified to Fig. 2, and among Fig. 2, T
2Be bidirectional triode thyristor, R
LBe the electric blanket heater strip, C is an electric capacity, and R ' is that (its value is R to current-limiting resistance
5, R
2, R
3Series value), as can be seen from Fig. 2, an anode E of bidirectional triode thyristor
1With heater strip R
LAn end connect another anode E
2Connect with power line A end; Heater strip R
LThe B end of the other end and power line connect; Capacitor C is with after current-limiting resistance R ' connects, be attempted by the control utmost point G end of power line B end and bidirectional triode thyristor, when a triggering signal adds to SCR control utmost point G, controllable silicon is conducting just, were it not for capacitor C is connected in the circuit, after triggering signal disappears so, bidirectional triode thyristor will turn-off, but it is just different to insert capacitor C, because leading 90 ° of the current ratio capacitor voltage at both ends in the capacitor in alternating current circuit, so be moment of capacitor discharge current maximum just in moment of zero at alternating voltage.This discharging current causes bidirectional triode thyristor to continue conducting constantly in " zero passage " just, so even triggering signal disappears, bidirectional triode thyristor still continues conducting, Here it is, and switch element is formed " self-locking " function that switching circuit had, if add a zero-signal (shorted to earth once) then controllable silicon will turn-off to bidirectional triode thyristor control utmost point G, electric charge has been put in the turn-off time inner capacitor, even so also not conducting again of zero-signal disappearance controllable silicon, because the each conducting of bidirectional triode thyristor all is the moment in alternating current " zero passage ", so the alternating current that passes through does not have wave distortion, also be noiseless generation.
As seen by switch element bidirectional triode thyristor T
2Not only ac power waveform is undistorted for the switching circuit of capacitor C and current-limiting resistance R ' formation, not disturb, and have " self-locking " function, if on this circuit base temperature control signals, just can constitute a simple automatic temperature control circuit.
The utility model designs on the basis of this switching circuit.
In order to improve indexs such as stability of the present utility model and control precision.Balanced bridge resistance R among Fig. 1
2R
3, can be with two voltage-stabiliser tube W
1, W
2Replace, as Fig. 3.
The utility model and existing on-off ratio have following remarkable advantage:
1, can make electric blanket really be in temperature constant state, and not be subjected to the impact of bed clothes heat-insulating property;
2, according to user's difference, the steady temperature of electric blanket can be between 30 °-50 ℃ any place selected, and the constant temperature precision be not more than ± 4 ℃;
3, economize on electricity does not obviously have unnecessary thermal waste;
4, volume is little, and cost is low, and production technology is simple.
Claims (3)
1, the electric blanket switch of electronics automatic temperature-control comprises the detector unit that places in the electric blanket, places the selected element of temperature in the switch enclosure, triggers element and switch element, it is characterized in that switch element bidirectional triode thyristor T
2An anode E
1With electric blanket heater strip R
LOne end connects, another anode E of bidirectional triode thyristor
2Connect electric blanket heater strip R with power line A end
LThe B end of the other end and power line connect.Switch element capacitor C one end and resistance R
5After one end connected, the other end of capacitor C connected with power line B end.Resistance R
5The other end through resistance R
2, R
3With bidirectional triode thyristor T
2Control utmost point G connect.
2, as claim 1 said electric blanket switch, it is characterized in that by capacitor C, resistance R
5, R
2, R
3To the branch road of SCR control utmost point G, can replace resistance R with 2 voltage-stabiliser tubes
2, R
3
3, as the said electric blanket switch of claim 2, it is characterized in that by capacitor C, resistance R
5, R
2, R
3To the branch road of SCR control utmost point G, resistance R
5, R
2, R
3Also can be with a resistance R ' replacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89210400 CN2053830U (en) | 1989-04-26 | 1989-04-26 | Switch of electrothermal blanket with automatic electronic temp. controlling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89210400 CN2053830U (en) | 1989-04-26 | 1989-04-26 | Switch of electrothermal blanket with automatic electronic temp. controlling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2053830U true CN2053830U (en) | 1990-02-28 |
Family
ID=4866775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89210400 Pending CN2053830U (en) | 1989-04-26 | 1989-04-26 | Switch of electrothermal blanket with automatic electronic temp. controlling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2053830U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352683C (en) * | 2002-10-30 | 2007-12-05 | 凯特姆两合公司 | Electrical heating device with several heating elements |
| CN103049024A (en) * | 2013-01-01 | 2013-04-17 | 李兴宁 | Temperature controller |
| CN107380736A (en) * | 2017-08-09 | 2017-11-24 | 北京军秀咨询有限公司 | A kind of detection kit of wisdom gene |
-
1989
- 1989-04-26 CN CN 89210400 patent/CN2053830U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352683C (en) * | 2002-10-30 | 2007-12-05 | 凯特姆两合公司 | Electrical heating device with several heating elements |
| CN103049024A (en) * | 2013-01-01 | 2013-04-17 | 李兴宁 | Temperature controller |
| CN107380736A (en) * | 2017-08-09 | 2017-11-24 | 北京军秀咨询有限公司 | A kind of detection kit of wisdom gene |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |