CN2343922Y - Temp. controller for electric heating blanket - Google Patents
Temp. controller for electric heating blanket Download PDFInfo
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- CN2343922Y CN2343922Y CN 98229600 CN98229600U CN2343922Y CN 2343922 Y CN2343922 Y CN 2343922Y CN 98229600 CN98229600 CN 98229600 CN 98229600 U CN98229600 U CN 98229600U CN 2343922 Y CN2343922 Y CN 2343922Y
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Abstract
The utility model relates to a temperature controller for electric heating blankets, comprising a commercial power interface, a working power supply circuit, a synchronizing pulse generating circuit, a temperature sample circuit, a reference voltage circuit, a comparator, a power output circuit and a heating wire interface. The utility model is characterized in that the input end of the power output circuit is connected with one end of the commercial power interface, and the output end of the power output circuit is connected with one end of the heating wire interface whose the other end is connected with the zero end of the working power supply circuit and the other end of the commercial power interface; the temperature sample circuit is provided with a temperature sensing wire interface.
Description
The utility model relates to a kind of electric blanket temperature control equipment.
Electric blanket is household electrical appliance of warming oneself, drive tide on a kind of bed, and its economical and energy saving is because due to topped, the limitation heating space of yarn fabric.If this electric heating transfer process is control not,, also exist the hidden danger of local overheating although its heating power is low.In order to address this problem, released a kind of safety temperature control electric blanket on the market, this electric blanket adopts the double-layer spiral line to make, and its double-layer spiral line is formed by heating line and temp.-sensing wire coiling, fills with the thermosensitive plastic layer between heating line and temp.-sensing wire.Adapt with it, the temperature controller of this kind electric blanket utilizes the negative temperature coefficient feature of thermosensitive plastic layer impedance, changes into the size that detects voltage, electric current, and then the control electric blanket temperature.In order to detect the temperature variation of heating line each point strictly according to the facts, this kind temperature controller requires the consistance of thermosensitive plastic layer character and the consistance of processing thickness, the manufacture craft of tackling the double-layer spiral line has mutually proposed higher requirement, and these requirements have limited promoting the use of of this kind safety, temperature control electric blanket.China's utility application discloses a kind of electric blanket economize on electricity temperature control safety device for No. 87209254, and its circuit comprises that one is provided with sniffer, comparator circuit, temperature regulation circuit, electric leakage and the break detection circuit etc. of thermal sensing element.When the temperature signal of sniffer during greater than predetermined value, comparator circuit control temperature regulation circuit makes it stop to heat, and when the temperature signal that detects during less than predetermined value, comparator circuit control temperature regulation circuit is heated it.In addition, when electric leakage or broken string situation appear in electric blanket, but the break detection circuit automatic shutdown circuit.Therefore, this protector has the advantages that can regulate temperature automatically and realize safety precaution.But, with regard to this protector, the but temperature controller of the electric blanket that can not make as aforementioned bifilar helix formula.Therefore, in order to promote the use of aforementioned safety temperature control electric blanket, be necessary to provide a kind of novel electric blanket temperature controller.
The purpose of this utility model promptly provides a kind of novel electric blanket temperature controller.
Electric blanket temperature controller of the present utility model has commercial power interface, working power circuit, synchronous pulse-generating circuit, temperature sampling circuit, reference voltage circuit, comparer, power output circuit and heating line interface.Wherein, the input termination commercial power interface of working power circuit, the power end of output termination synchronous pulse-generating circuit, temperature sampling circuit, reference voltage circuit and the comparer of working power circuit, the synchronous signal input end of synchronous pulse-generating circuit connects commercial power interface, the input end of the output terminal jointing temp sample circuit of synchronous pulse-generating circuit, one input end of the output termination comparer of temperature sampling circuit, another input end of the output termination comparer of reference voltage circuit, the control end of the output termination power output circuit of comparer.In the utility model, the input end of above-mentioned power output circuit joins with an end of commercial power interface especially, one end of the output terminal sending and receiving hot line interface of power output circuit, the other end of heating line interface joins with the mould end of working power circuit and the other end of commercial power interface, and described temperature sampling circuit has the temp.-sensing wire interface.When using temperature controller of the present utility model, the heating line of the bifilar helix of heating line interface and electric blanket should be joined, the temp.-sensing wire of temp.-sensing wire interface and bifilar helix is joined.Like this, can utilize this controller that electric blanket is carried out temperature control.In the utility model, comparer can adopt existing various comparator circuit to constitute, but is good to adopt double-limit comparator especially.Herein said double-limit comparator on be limited to design temperature, be limited to down the start-up point of abnormal high temperature protection.When controller is worked, the pulse signal that is produced by synchronous pulse-generating circuit is sent to temperature sampling circuit, form sample-pulse signal, this signal is sent to an input end of comparer, after the reference signal that is provided by reference voltage circuit is compared, by the break-make of comparer power controlling output circuit.In this controller, because an end of heating line links to each other with the output terminal of power output circuit, and the other end of heating line links to each other with the zero end of low-voltage direct working power and an end of line voltage, this kind circuit structure make ratio of pulse length to the total cycle length than the time, the working current that the just working power circuit that temperature sampling circuit flows through provides, and do not have the electric current of line voltage by thermosensitive plastic layer in the bifilar helix, got rid of the measuring error of bringing because of thermosensitive plastic layer inconsistency.
As mentioned above, controller of the present utility model is compared with quasi-controller with aforementioned having now, can be applicable to the safety temperature control electric blanket that bifilar helix is made, can avoid the measuring error brought because of thermosensitive plastic layer inconsistency again, the corresponding reduction the manufacture craft of double-layer spiral line and the excessive demand of thermosensitive plastic performance helps the popularization of this safety temperature control electric blanket.
Content of the present utility model further illustrates with the following Examples, but content of the present utility model is not limited only to content related among the embodiment.
Fig. 1 is the circuit block diagram of electric blanket temperature controller among the embodiment.
Fig. 2 is a circuit diagram.
As shown in Figure 1, electric blanket temperature controller in the present embodiment has commercial power interface 1, working power circuit 2, synchronous pulse-generating circuit 3, temperature sampling circuit 4, reference voltage circuit 5, comparer 6, power output circuit 7 and heating line interface 8, the input termination commercial power interface 1 of described working power circuit 2, the output termination synchronous pulse-generating circuit 3 of working power circuit 2, temperature sampling circuit 4, the power end of reference voltage circuit 5 and comparer 6, the synchronous signal input end of synchronous pulse-generating circuit 3 connects commercial power interface 1, the input end of the output terminal jointing temp sample circuit 4 of synchronous pulse-generating circuit 3, one input end of the output termination comparer 6 of temperature sampling circuit 4, another input end of the output termination comparer 6 of reference voltage circuit 5, the control end of the output termination power output circuit 7 of comparer 6, it is characterized in that the input end of power output circuit 7 and an end of commercial power interface 1 join, one end of the output terminal sending and receiving hot line interface 8 of power output circuit 7, the other end of heating line interface 8 joins with the zero end of working power circuit 2 and the other end of commercial power interface 1, and described temperature sampling circuit 4 has the temp.-sensing wire interface.In the present embodiment, above-mentioned comparer 6 is a double-limit comparator.
As shown in Figure 2, above-mentioned commercial power interface 1 comprises contact u, v and fuse F1, coordinated type power switch K1-1, K1-2, resistance R 1 and light emitting diode D1, and wherein resistance R 1 and light emitting diode D1 are as the power supply indication; Working power circuit 2 is made up of resistance R 2, capacitor C 1, diode D2～D4; Synchronous pulse-generating circuit 3 is made up of the operational amplifier A 1 among resistance R 3～R6, capacitor C 2, diode D5 and the four computing amplification circuit LM324; Temperature sampling circuit 4 is made of resistance R 7, R8 and temp.-sensing wire interface (being contact d, e); Reference voltage circuit 5 is made up of resistance R 9, R10, potentiometer Rw and diode D6; Double-limit comparator 6 is made up of operational amplifier A 2, the A3 among the four computing amplification circuit LM324; Power output circuit 7 is made of resistance R 11, R12, diode D7～D9 and controllable silicon V1; Heating line interface 8 is contact a, b.
During controller in using present embodiment, the heating line RH of the bifilar helix of contact a, the b of heating line interface and electric blanket can be joined, contact d, the e of temp.-sensing wire interface and the temp.-sensing wire RS of bifilar helix are joined.When controller was worked, civil power was introduced by contact u, the v of commercial power interface.The working power circuit of being made up of resistance R 2, capacitor C 1, diode D2～D4 provides working current to synchronous pulse-generating circuit, temperature sampling circuit, reference voltage circuit and comparer; Deliver to temperature sampling circuit by the synchronizing pulse that synchronous pulse-generating circuit produced that resistance R 3～R6, capacitor C 2, diode D5 and operational amplifier A 1 are formed, form pulse signal temp.-sensing wire RS sampling.The signal of temperature sampling circuit is delivered to 6 pin of comparison integrated circuit A2 and 12 pin of A3 by the A point.Simultaneously, the signal of reference voltage circuit is delivered to 5 pin of A2 by the B point, is delivered to 13 pin of A3 by the C point.As pulses low V
ABe higher than preset level V
BThe time, relatively integrated circuit A2 no pulse output, the controllable silicon V1 in the power output circuit is cut-off state, and heating line RH no current passes through.As pulses low V
ABe lower than preset level V
BThe time, synchronizing pulse output makes the controllable silicon V1 conducting in the power output circuit, and heating line RH gets electric work.In addition, in the heating line energising course of work, if because of the improper use of electric blanket forms localized hyperthermia, the thermosensitive plastic layer impedance in the double-layer spiral line is reduced, its result is equivalent to make temp.-sensing wire RS in parallel with heating line RH, V
ALevel is corresponding to be lower than V
BLevel, the output pincers of A3 have ended trigger pulse, and controllable silicon V1 is ended, heating line RH outage, unlikely causing danger.When controllable silicon V1 breaks down and when not controlled, the electric current of second tube sheet D9 guiding fuses fuse F1 immediately, reach the protection purpose.If short circuit between the moment of heating line energising double-layer spiral line, the loop of then working is destroyed, triggerless pulse output.Because heating line RH one end connects controllable silicon V1 and line voltage is isolated, and the other end is associated in working power zero end, so civil power can not pass through, does not have power output, can guarantee safety.
Claims (2)
1, a kind of electric blanket temperature controller, has commercial power interface, working power circuit, synchronous pulse-generating circuit, temperature sampling circuit, reference voltage circuit, comparer, power output circuit and heating line interface, the input termination commercial power interface of described working power circuit, the output termination synchronous pulse-generating circuit of working power circuit, temperature sampling circuit, the power end of reference voltage circuit and comparer, the synchronous signal input end of synchronous pulse-generating circuit connects commercial power interface, the input end of the output terminal jointing temp sample circuit of synchronous pulse-generating circuit, one input end of the output termination comparer of temperature sampling circuit, another input end of the output termination comparer of reference voltage circuit, the control end of the output termination power output circuit of comparer, it is characterized in that the input end of power output circuit and an end of commercial power interface join, one end of the output terminal sending and receiving hot line interface of power output circuit, the other end of heating line interface joins with the zero end of working power circuit and the other end of commercial power interface, and described temperature sampling circuit has the temp.-sensing wire interface.
2, temperature controller as claimed in claim 1 is characterized in that described comparer is a double-limit comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98229600 CN2343922Y (en) | 1998-09-30 | 1998-09-30 | Temp. controller for electric heating blanket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98229600 CN2343922Y (en) | 1998-09-30 | 1998-09-30 | Temp. controller for electric heating blanket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2343922Y true CN2343922Y (en) | 1999-10-20 |
Family
ID=33979467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98229600 Expired - Fee Related CN2343922Y (en) | 1998-09-30 | 1998-09-30 | Temp. controller for electric heating blanket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2343922Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102314183A (en) * | 2011-08-25 | 2012-01-11 | 桐乡市爱贝斯电暖科技有限公司 | Whole line temperature control circuit |
| CN109224311A (en) * | 2018-08-29 | 2019-01-18 | 苏州医疗用品厂有限公司 | A kind of temperature control method of special electromagnetic therapeutic apparatus |
-
1998
- 1998-09-30 CN CN 98229600 patent/CN2343922Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102314183A (en) * | 2011-08-25 | 2012-01-11 | 桐乡市爱贝斯电暖科技有限公司 | Whole line temperature control circuit |
| CN102314183B (en) * | 2011-08-25 | 2014-11-05 | 桐乡市爱贝斯电暖科技有限公司 | Whole line temperature control circuit |
| CN109224311A (en) * | 2018-08-29 | 2019-01-18 | 苏州医疗用品厂有限公司 | A kind of temperature control method of special electromagnetic therapeutic apparatus |
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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 |