CN101426309B

CN101426309B - Electric power circuit for quasi-resonance electromagnetic water heater

Info

Publication number: CN101426309B
Application number: CN2008102309090A
Authority: CN
Inventors: 张军才; 杨建昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-14
Filing date: 2008-11-14
Publication date: 2011-04-20
Anticipated expiration: 2028-11-14
Also published as: CN101426309A

Abstract

The present invention provides a power supply circuit of a quasi-resonance electromagnet water heater, wherein the circuit comprises a commercial power switching-in end, a fuse, a conjugation coil, two filtering capacitors, a piezoresistor, a full-bridge rectification circuit and an L-type filtering circuit. The commercial power switching-in end is sequentially connected with the fuse and two ends of one side of the conjugation coil electrically. The two ends of the other side of the conjugation coil are respectively connected with two input ends of the full-bridge rectification circuit electrically. Two filtering capacitors are respectively connected to two sides of the conjugation coil electrically. Two ends of the piezoresistor are electrically connected with two input ends of the full-bridge rectification circuit. One output end of the full-bridge rectification circuit is grounded, and the other output end of the full-bridge rectification circuit is electrically connected with the L-type filtering circuit which comprises an inductor and a capacitor. One end of the inductor is electrically connected with the other output end of the full-bridge rectification circuit. The other end of the inductor is electrically connected with one end of the capacitor. The other end of the capacitor is grounded. The other end of the inductor is the power supplying output end of the power supply circuit. The power supply circuit has the advantages of good operating stability, safe and reliable use and strong adaptability.

Description

Electric power circuit for quasi-resonance electromagnetic water heater

Technical field

The present invention relates to a kind of power circuit, specifically, relate to a kind of electric power circuit for quasi-resonance electromagnetic water heater.

Background technology

Quasi-resonance electromagnet water heater is a kind of water heater that utilizes electromagnetic induction heating for principle, and during work, the logical high-frequency current of acting solenoid producing powerful high frequency magnetic field, and then makes the METAL HEATING PROCESS body produce powerful eddy current and heating acting under the choked flow effect; For guaranteeing the steady operation and the security performance of water heater, this makes water heater just very high to the requirement of its power supply.

In order to overcome the above problems, people are seeking a kind of desirable technical solution always.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, thereby provide a kind of safe and reliable, working stability, electric power circuit for quasi-resonance electromagnetic water heater that adaptive capacity is strong, the high-frequency signal that this circuit produces in the time of can effectively preventing quasi-resonance electromagnet water heater work.

The objective of the invention is to realize by following technical scheme:

A kind of electric power circuit for quasi-resonance electromagnetic water heater, this circuit comprises the civil power incoming end, insurance, associate coil, two filter capacitors, piezo-resistance, full bridge rectifier and L type filter circuit, described civil power incoming end is electrically connected the two ends of described insurance and described associate coil one side successively, the two ends of described associate coil opposite side are electrically connected described full bridge rectifier two inputs respectively, two described filter capacitors are connected in parallel on the both sides of described associate coil respectively, described piezo-resistance two ends are connected electrically in described full bridge rectifier two inputs, described full bridge rectifier one output head grounding, another output of described full bridge rectifier is electrically connected described L type filter circuit, described L type filter circuit comprises inductance and electric capacity, described inductance one end is electrically connected another output of described full bridge rectifier, the described inductance other end is electrically connected described electric capacity one end, described electric capacity other end ground connection, the described inductance other end are power circuit power supply output.

Described power circuit power supply output is electrically connected commutator transformer, perhaps, described full bridge rectifier two inputs are electrically connected the positive pole of a diode respectively, described diode cathode is electrically connected commutator transformer, and described commutator transformer primary side is outwards exported the 18V direct voltage through small-power switching power-supply chip Viper12A.

Based on above-mentioned, described power circuit power supply output is electrically connected commutator transformer, and described commutator transformer secondary side is outwards exported the 18V direct voltage through the Viper12A chip.

Based on above-mentioned, described full bridge rectifier two inputs are electrically connected the positive pole of a diode respectively, and described diode cathode is electrically connected commutator transformer, and described commutator transformer secondary side is outwards exported the 18V direct voltage through the Viper12A chip.

Based on above-mentioned, described commutator transformer secondary side is outwards exported the 5V direct voltage through three-terminal regulator block 7805.

The present invention has outstanding substantive distinguishing features and obvious improvement with respect to prior art, specifically, the net electricity is input to common choking coil, electric capacity through insurance, constitutes net electrical interference absorption circuit, and the high-frequency signal that produces when also effectively preventing simultaneously quasi-resonance electromagnet water heater work returns net; Piezo-resistance has certain The wave absorption, resistance reduces short circuit suddenly after voltage exceeds certain numerical value, and insurance is blown, and can effectively protect back level electronic original part; This power circuit good operating stability, safe and reliable, the condition of work adaptive capacity is strong.

Description of drawings

Fig. 1 is a circuit theory schematic diagram of the present invention;

Fig. 2 is the circuit theory schematic diagram of dc low-voltage output power supply circuit of the present invention.

Embodiment

The present invention is described in further detail below in conjunction with the drawings and specific embodiments:

As shown in Figure 1, a kind of electric power circuit for quasi-resonance electromagnetic water heater, this circuit comprise civil power incoming end LN, insurance F, associate coil L1, two filter capacitor C1 and C2, piezo-resistance FNR, full bridge rectifier DT and L type filter circuit;

After being electrically connected described insurance F, the L end of described civil power incoming end is connected with an end of described associate coil L1 one side, the N end of described civil power incoming end is electrically connected the other end of described associate coil L1 one side, described associate coil L1 opposite side two ends are electrically connected described full bridge rectifier DT two inputs respectively, described filter capacitor C1 two ends are connected electrically in the two ends of described associate coil L1 one side respectively, described filter capacitor C2 two ends are connected electrically in the two ends of described associate coil L1 opposite side respectively, described piezo-resistance FNR two ends are connected electrically in described full bridge rectifier DT two input A, B, described full bridge rectifier DT one output head grounding, described another output of full bridge rectifier DT is electrically connected described L type filter circuit, described L type filter circuit comprises inductance L and capacitor C, described inductance L one end is electrically connected described another output of full bridge rectifier DT, the described inductance L other end is electrically connected described capacitor C one end, described capacitor C other end ground connection, the described inductance L other end are power circuit power supply output SC.

As shown in Figure 2, described dc low-voltage output power supply circuit two ends are electrically connected described full bridge rectifier two inputs, described dc low-voltage output power supply circuit two ends are electrically connected a diode D22 respectively, D23, the negative pole of described diode D22 and described diode D23 is electrically connected resistance R 53 1 ends respectively, resistance R 53 other ends serial connection capacitor C 47 back ground connection, resistance R 53 other ends connect commutator transformer T2 primary side one end, be serially connected with resistance R 54 and diode D24 between the commutator transformer primary side two ends, resistance R 54 two ends also are connected to capacitor C 48, the resistance R 54 1 terminating resistor R53 other ends, resistance R 54 another terminating diode D24 negative poles, diode D24 positive pole connects small-power switching power-supply chip Viper12A5 pin, 6 pin, 7 pin, 8 pin;

Described commutator transformer T2 secondary side one end ground connection, its another terminating diode D26 positive pole, diode D26 negative pole connects diode D27 positive pole, diode D27 negative pole connects small-power switching power-supply chip Viper12A4 pin, small-power switching power-supply chip Viper12A3 pin connects reference voltage voltage stabilizing didoe ZD2 one end, another terminating diode of reference voltage voltage stabilizing didoe ZD2 D26 negative pole, connect capacitor C 39 between small-power switching power-supply chip Viper12A1 pin and 3 pin, small-power switching power-supply chip Viper12A1 pin and 2 pin ground connection, diode D27 negative pole connects capacitor C 38 back ground connection, diode D27 positive pole connects capacitor C 40 back ground connection, diode D27 positive pole connects capacitor C 41 back ground connection, output+18V direct voltage behind the anodal connecting resistance R52 of diode D27.

Based on above-mentioned, described commutator transformer T2 secondary side joint diode D25 positive pole, diode D25 negative pole connects 2 pin of three-

terminal regulator block

7805,1 pin of three-terminal regulator block 7805 connects capacitor C 45 back ground connection, 1 pin of three-terminal regulator block 7805 connects capacitor C 46 back ground connection, and 3 pin of three-terminal regulator block 7805 connect capacitor C 43 back ground connection, and 3 pin of three-terminal regulator block 7805 connect capacitor C 44 back ground connection, 2 pin ground connection of three-

terminal regulator block

7805,1 pin of three-terminal regulator block 7805 is outwards exported+the 5V direct voltage.

Power supply is divided into two parts; First is imported through insurance by civil power, enter the filtering of power supply full-bridge rectification by L1, C1, C2 after to civil power filtering clutter, obtain the direct voltage about 270V, then, the L type filter circuit filtering of forming through inductance L, capacitor C again, last output power supply; Wherein, FNR is a piezo-resistance;

Second portion is the core low-voltage dc power supply with small-power switching power-supply chip Viper12A, it by diode D23, D24 by means of two diodes on the full bridge rectifier DT of first, form full-wave rectifying circuit, through resistance R 53 and capacitor C 47 capacitance-resistance filters, obtain 270V left and right sides direct voltage at commutator transformer T2 primary side, again via small-power switching power-supply chip Viper12A and peripheral electron original paper built-up circuit, through the outside output+18V direct voltage of diode D26, resistance R 52; Another road is through the outside output+5V direct voltage of diode D25 and three-terminal regulator block 7805;

Capacitor C 46, C45, C43, C44, C41, C40, C38, CC39 are filtering and high frequency filtering electric capacity, and ZD2 is the reference voltage voltage stabilizing didoe, and C48, R54, D24 are used to prevent high-frequency self-excitation and spike.

Need to prove that in other embodiments, described commutator transformer also can directly be electrically connected described power circuit power supply output; This circuit can be used in any electromagnetic heater or the equipment.

Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.

Claims

1. electric power circuit for quasi-resonance electromagnetic water heater, it is characterized in that: this circuit comprises the civil power incoming end, insurance, associate coil, two filter capacitors, piezo-resistance, full bridge rectifier and L type filter circuit, described civil power incoming end is electrically connected the two ends of described insurance and described associate coil one side successively, the two ends of described associate coil opposite side are electrically connected described full bridge rectifier two inputs respectively, two described filter capacitors are connected in parallel on the both sides of described associate coil respectively, described piezo-resistance two ends are connected electrically in described full bridge rectifier two inputs, described full bridge rectifier one output head grounding, another output of described full bridge rectifier is electrically connected described L type filter circuit, described L type filter circuit comprises inductance and electric capacity, described inductance one end is electrically connected another output of described full bridge rectifier, the described inductance other end is electrically connected described electric capacity one end, described electric capacity other end ground connection, the described inductance other end are power circuit power supply output;

2. electric power circuit for quasi-resonance electromagnetic water heater according to claim 1 is characterized in that: described commutator transformer secondary side is outwards exported the 5V direct voltage through three-terminal regulator block 7805.