CN218771803U - Temperature control panel and voltage-regulating power supply circuit thereof - Google Patents
Temperature control panel and voltage-regulating power supply circuit thereof Download PDFInfo
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- CN218771803U CN218771803U CN202222525780.4U CN202222525780U CN218771803U CN 218771803 U CN218771803 U CN 218771803U CN 202222525780 U CN202222525780 U CN 202222525780U CN 218771803 U CN218771803 U CN 218771803U
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Abstract
The utility model discloses a temperature control panel and a voltage regulating power supply circuit thereof, which comprises an MCU processor, a temperature sensor, a relay and a voltage regulating power supply circuit, wherein the temperature sensor, the relay and the voltage regulating power supply circuit are connected with the MCU processor; the voltage-regulating power supply circuit is used for providing driving voltage for the relay, and the output voltage of the voltage-regulating power supply circuit is adjustable. The utility model discloses can effectively reduce the self consumption of voltage regulating power supply circuit and reduce the consumption when the relay is in the closure state, and then can effectively reduce generating heat of control by temperature change panel self.
Description
Technical Field
The utility model relates to a control by temperature change panel field especially indicates a control by temperature change panel and voltage regulating power supply circuit thereof.
Background
The intelligent home is a novel household appliance which takes a house as a platform, constructs efficient residential facilities and a management system of family schedule affairs, improves home safety, convenience, comfort and artistry, and realizes an environment-friendly and energy-saving living environment.
Electronic modules such as an MCU (microprogrammed control Unit), a power supply module, a relay, a temperature sensor, a display screen and an indicator light are arranged in an existing temperature control panel, wherein the temperature sensor is used for detecting the temperature of an external environment, other electronic modules can generate a lot of heat in the working process, and the temperature sensor can be heated to generate errors under the influence of the heat; moreover, because the power consumed by the electronic modules in the working process is in a dynamically changing state, the error generated by the heating of the temperature sensor is always in a dynamically changing state, so that the temperature sensor cannot accurately detect the external environment temperature.
Therefore, the applicant provides a temperature control panel and a voltage-regulating power supply circuit thereof for reducing the power consumption of the relay in the closed state.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a control by temperature change panel and regulating power supply circuit thereof, this regulating power supply circuit are used for providing drive voltage for control by temperature change panel's relay to can effectively reduce the consumption of relay when being in the closure state.
In order to achieve the above purpose, the solution of the present invention is:
a voltage-regulating power supply circuit comprises an input rectification filter circuit and a voltage reduction circuit; the output end of the input rectifying and filtering circuit is connected with the input end of the voltage reducing circuit; the voltage reduction circuit comprises a PWM control chip U1, a resistor R1, a capacitor CT1, an inductor L1, a freewheeling diode D1 and an adjustable feedback unit, wherein a Drain pin of the PWM control chip U1 is connected with the input end of the voltage reduction unit, a VDD pin of the PWM control chip U1 is connected with the anode of the capacitor CT1, a GND pin of the PWM control chip U1 is connected with the first end of the resistor R1, the cathode of the capacitor CT1, the first end of the inductor L1 and the cathode of the freewheeling diode D1, a CS pin of the PWM control chip U1 is connected with the second end of the resistor R1, the second end of the inductor L1 is connected with the output end of the voltage reduction circuit, and the anode of the freewheeling diode D1 is grounded; adjustable feedback unit includes opto-coupler U2, resistance R3, resistance R4, electric capacity C1 and diode D2, the anodal output that is used for connecting the MCU treater of input of opto-coupler U2, the input negative pole ground connection of opto-coupler U2, the anodal first end of connecting resistance R4 of output of opto-coupler U2, the first end of connecting resistance R2 is held to resistance R4's second, resistance R3's first end and PWM control chip U1's FB foot, electric capacity C2's first end and diode D2's negative pole are connected to resistance R2's second end, the output of step-down circuit is connected to diode D2's positive pole, electric capacity C2's second end, PWM control chip U1's GND foot is connected to resistance R3's second end and opto-coupler U2's output negative pole.
The input rectifying and filtering circuit comprises an inductor L2, a capacitor CT3 and a diode D3, wherein the anode of the diode D3 is connected with the input end of the input rectifying and filtering circuit, the cathode of the diode D3 is connected with the first end of the inductor L2 and the anode of the capacitor CT2, the second end of the inductor L2 and the anode of the capacitor CT3 are connected with the output end of the input rectifying and filtering circuit, and the cathode of the capacitor CT2 and the cathode of the capacitor CT3 are grounded.
The voltage-regulating power supply circuit further comprises an input protection circuit, and the output end of the input protection circuit is connected with the input end of the input rectifying and filtering circuit.
The input protection circuit comprises a fuse F1 and a thermistor RT, the first end of the fuse F1 is connected with the input end of the input protection circuit, the second end of the fuse F1 and the first end of the thermistor RT are connected with the output end of the input protection circuit, and the second end of the thermistor RT is grounded.
The voltage-regulating power supply circuit also comprises an output filter circuit connected with the output end of the voltage-reducing circuit.
The output filter circuit comprises a capacitor CT4 and a capacitor C2, the positive electrode of the capacitor CT4 and the first end of the capacitor C2 are connected with the output end of the voltage reduction circuit, and the negative electrode of the capacitor CT4 and the second end of the capacitor C2 are grounded.
The model of the PWM control chip U1 is OB2222LM or KP3211SGA.
A temperature control panel comprises an MCU processor, a temperature sensor, a relay and the voltage-regulating power supply circuit; the temperature sensor is connected with one input end of the MCU processor; the output end of a voltage reduction circuit of the voltage regulation power supply circuit is connected with a coil of the relay through an electronic switch circuit, the input end and the output end of the electronic switch circuit are respectively connected with the output end of the voltage reduction circuit and the coil of the relay, and the control end of the electronic switch circuit is connected with one output end of the MCU processor; and the input anode of an optocoupler U2 of the voltage reduction circuit is connected with one output end of the MCU processor.
After the scheme is adopted, the utility model discloses a voltage regulating power supply circuit's step-down circuit's output voltage is adjustable, adjusts the theory of operation and does: the utility model discloses whether MCU treater that can pass through the control by temperature change panel switches on through control opto-coupler U2 and whether control resistor R4 is parallelly connected with resistance R3 to adjust the voltage that the feedback unit input PWM control chip U1's FB foot and, and then adjust the duty cycle of the PWM signal of PWM control chip U1's CS foot output and adjust the output voltage of step-down circuit. The output voltage of the voltage reduction circuit based on the voltage regulation power supply circuit is adjustable, so that when the relay does not need to be closed, the MCU processor of the temperature control panel controls the output voltage of the voltage reduction circuit of the voltage regulation power supply circuit to be reduced, and the power consumption of the voltage regulation power supply circuit is reduced; when the relay needs to be closed, the output voltage of the voltage reduction circuit of the voltage regulation power supply circuit is controlled to rise by the MCU processor, then the MCU processor controls the voltage reduction circuit to supply power to the relay through the electronic switch circuit so as to close the relay, and after the relay is reliably closed, the output voltage of the voltage reduction circuit of the voltage regulation power supply circuit is controlled to be reduced by the MCU processor, so that the power consumption of the relay and the voltage regulation power supply circuit is reduced.
By the way, the utility model discloses a regulation power supply circuit's output voltage is adjustable, consequently can dynamic adjustment regulation power supply circuit's output voltage to can effectively reduce regulation power supply circuit's self consumption and reduce the consumption when the relay is in the closed condition, and then can effectively reduce generating heat of control by temperature change panel self.
Drawings
Fig. 1 is a schematic block diagram of a temperature control panel according to the present invention;
fig. 2 is a schematic circuit diagram of the voltage-regulating power supply circuit of the present invention.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the specific embodiments below.
As shown in fig. 1 and 2, the present invention discloses a temperature control panel, which comprises an MCU processor, a temperature sensor, a relay and a voltage-regulating power circuit; the temperature sensor is connected with one input end of the MCU processor, and the MCU processor acquires environmental temperature data through the temperature sensor; the output end of the voltage-regulating power supply circuit is connected with the coil of the relay through the electronic switch circuit, the input end and the output end of the electronic switch circuit are respectively connected with the output end of the voltage-regulating power supply circuit and the coil of the relay, the control end of the electronic switch circuit is connected with one output end of the MCU processor, and the MCU processor controls whether the relay is closed or not by controlling the on-off of the electronic switch circuit.
As shown in fig. 2, the voltage-regulating power supply circuit includes an input rectifying and filtering circuit and a voltage-reducing circuit; the output end of the input rectifying filter circuit is connected with the input end of the voltage reduction circuit, and the output end of the voltage reduction circuit is the output end of the voltage regulation power supply circuit; the voltage reduction circuit comprises a PWM control chip U1, a resistor R1, a capacitor CT1, an inductor L1, a freewheeling diode D1 and an adjustable feedback unit 421, wherein a Drain pin of the PWM control chip U1 is connected with the input end of the voltage reduction unit, a VDD pin of the PWM control chip U1 is connected with the anode of the capacitor CT1, a GND pin of the PWM control chip U1 is connected with the first end of the resistor R1, the cathode of the capacitor CT1, the first end of the inductor L1 and the cathode of the freewheeling diode D1, a CS pin of the PWM control chip U1 is connected with the second end of the resistor R1, the second end of the inductor L1 is connected with the output end of the voltage reduction circuit, and the anode of the freewheeling diode D1 is grounded; adjustable feedback unit includes opto-coupler U2, resistance R3, resistance R4, electric capacity C1 and diode D2, the output of MCU treater is connected to opto-coupler U2's input positive pole, opto-coupler U2's input negative pole ground connection, opto-coupler U2's the first end of the anodal connecting resistance R4 of output, resistance R4's second end connecting resistance R2's first end, resistance R3's first end and PWM control chip U1's FB foot, electric capacity C2's first end and diode D2's negative pole are connected to resistance R2's second end, diode D2's anodal output of step-down circuit, electric capacity C2's second end, resistance R3's second end and the GND foot of PWM control chip U1 are connected to opto-coupler U2's output negative pole. The model of the PWM control chip U1 may be OB2222LM or KP3211SGA.
The utility model discloses a voltage regulating power supply circuit's step-down circuit's output voltage is adjustable, and specific regulation theory of operation does: the feedback unit of the voltage reduction circuit is used for feeding back the output voltage of the voltage reduction circuit to the FB pin of the PWM control chip U1 so as to adjust the duty ratio of the PWM signal output by the CS pin of the PWM control chip U1; the MCU processor can control whether the resistor R4 and the resistor R3 are connected in parallel or not by controlling whether the optocoupler U2 is switched on or not, so that the voltage input to the FB pin of the PWM control chip U1 by the feedback unit is adjusted, and the duty ratio of a PWM signal output by the CS pin of the PWM control chip U1 is adjusted to adjust the output voltage of the voltage reduction circuit; when the resistor R4 is connected with the resistor R3 in parallel, the output voltage of the voltage reduction circuit is increased; when the resistor R4 and the resistor R3 are not connected in parallel, the output voltage of the step-down circuit is lowered.
The output voltage of the voltage reduction circuit based on the voltage regulation power supply circuit is adjustable, so that when the relay does not need to be closed, the MCU processor controls the output voltage of the voltage reduction circuit of the voltage regulation power supply circuit to be reduced, and the power consumption of the voltage regulation power supply circuit is reduced; when the relay needs to be closed, the MCU processor firstly controls the output voltage of the voltage reduction circuit of the voltage regulation power supply circuit to rise, then the MCU processor controls the electronic switch circuit to be conducted to close the relay, and after the relay is reliably closed (about 200 milliseconds), the MCU processor controls the output voltage of the voltage reduction circuit of the voltage regulation power supply circuit to be reduced, so that the power consumption of the relay and the voltage regulation power supply circuit is reduced; can know by the foregoing, the utility model discloses a regulation power supply circuit's output voltage is adjustable, consequently can dynamic adjustment regulation power supply circuit's output voltage to can effectively reduce regulation power supply circuit's self consumption and reduce the consumption of relay when being in the closure state, and then can effectively reduce generating heat of temperature control panel self.
As shown in fig. 2, the input rectifying and filtering circuit includes an inductor L2, a capacitor CT3, and a diode D3, wherein an anode of the diode D3 is connected to an input end of the input rectifying and filtering circuit, a cathode of the diode D3 is connected to a first end of the inductor L2 and an anode of the capacitor CT2, a second end of the inductor L2 and an anode of the capacitor CT3 are connected to an output end of the input rectifying and filtering circuit, and a cathode of the capacitor CT2 and a cathode of the capacitor CT3 are grounded.
As shown in fig. 2, the voltage-regulating power supply circuit further includes an input protection circuit, an output terminal of the input protection circuit is connected to an input terminal of the input rectification filter circuit, and the input protection circuit can perform overcurrent and overvoltage protection to ensure power consumption safety; the input protection circuit can include fuse F1 and thermistor RT, and input protection circuit's input is connected to the first end of fuse F1, and input protection circuit's output is connected to the second end of fuse F1 and the first end of thermistor RT, and the second end ground connection of thermistor RT.
As shown in fig. 2, the voltage-regulating power supply circuit further includes an output filter circuit connected to the output terminal of the voltage-reducing circuit, and the output filter circuit can stabilize the output voltage of the voltage-reducing circuit. The output filter circuit can comprise a capacitor CT4 and a capacitor C2, the positive electrode of the capacitor CT4 and the first end of the capacitor C2 are connected with the output end of the voltage reduction circuit, and the negative electrode of the capacitor CT4 and the second end of the capacitor C2 are grounded.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.
Claims (8)
1. A voltage regulated power supply circuit, characterized by: the input rectifying filter circuit and the voltage reducing circuit are included;
the output end of the input rectifying and filtering circuit is connected with the input end of the voltage reducing circuit;
the voltage reduction circuit comprises a PWM control chip U1, a resistor R1, a capacitor CT1, an inductor L1, a freewheeling diode D1 and an adjustable feedback unit, wherein a Drain pin of the PWM control chip U1 is connected with the input end of the voltage reduction unit, a VDD pin of the PWM control chip U1 is connected with the anode of the capacitor CT1, a GND pin of the PWM control chip U1 is connected with the first end of the resistor R1, the cathode of the capacitor CT1, the first end of the inductor L1 and the cathode of the freewheeling diode D1, a CS pin of the PWM control chip U1 is connected with the second end of the resistor R1, the second end of the inductor L1 is connected with the output end of the voltage reduction circuit, and the anode of the freewheeling diode D1 is grounded; adjustable feedback unit includes opto-coupler U2, resistance R3, resistance R4, electric capacity C1 and diode D2, the anodal output that is used for connecting the MCU treater of input of opto-coupler U2, the input negative pole ground connection of opto-coupler U2, the anodal first end of connecting resistance R4 of output of opto-coupler U2, the first end of connecting resistance R2 is held to resistance R4's second, resistance R3's first end and PWM control chip U1's FB foot, electric capacity C2's first end and diode D2's negative pole are connected to resistance R2's second end, the output of step-down circuit is connected to diode D2's positive pole, electric capacity C2's second end, PWM control chip U1's GND foot is connected to resistance R3's second end and opto-coupler U2's output negative pole.
2. The voltage regulated power supply circuit of claim 1 wherein: the input rectifying and filtering circuit comprises an inductor L2, a capacitor CT3 and a diode D3, wherein the anode of the diode D3 is connected with the input end of the input rectifying and filtering circuit, the cathode of the diode D3 is connected with the first end of the inductor L2 and the anode of the capacitor CT2, the second end of the inductor L2 and the anode of the capacitor CT3 are connected with the output end of the input rectifying and filtering circuit, and the cathode of the capacitor CT2 and the cathode of the capacitor CT3 are grounded.
3. The voltage regulated power supply circuit of claim 1 wherein: the output end of the input protection circuit is connected with the input end of the input rectifying and filtering circuit.
4. The regulated power supply circuit of claim 3, wherein: the input protection circuit comprises a fuse F1 and a thermistor RT, the first end of the fuse F1 is connected with the input end of the input protection circuit, the second end of the fuse F1 and the first end of the thermistor RT are connected with the output end of the input protection circuit, and the second end of the thermistor RT is grounded.
5. The voltage regulated power supply circuit of claim 1, wherein: the voltage reducing circuit also comprises an output filter circuit connected with the output end of the voltage reducing circuit.
6. The voltage regulated power supply circuit of claim 5 wherein: the output filter circuit comprises a capacitor CT4 and a capacitor C2, the positive electrode of the capacitor CT4 and the first end of the capacitor C2 are connected with the output end of the voltage reduction circuit, and the negative electrode of the capacitor CT4 and the second end of the capacitor C2 are grounded.
7. The voltage regulated power supply circuit of claim 1 wherein: the model of the PWM control chip U1 is OB2222LM or KP3211SGA.
8. A temperature control panel, comprising: comprising an MCU processor, a temperature sensor, a relay and a voltage regulated power supply circuit according to any of claims 1 to 7;
the temperature sensor is connected with one input end of the MCU processor;
the output end of a voltage reduction circuit of the voltage regulation power supply circuit is connected with a coil of the relay through an electronic switch circuit, the input end and the output end of the electronic switch circuit are respectively connected with the output end of the voltage reduction circuit and the coil of the relay, and the control end of the electronic switch circuit is connected with one output end of the MCU processor; and the input anode of an optocoupler U2 of the voltage reduction circuit is connected with one output end of the MCU processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222525780.4U CN218771803U (en) | 2022-09-19 | 2022-09-19 | Temperature control panel and voltage-regulating power supply circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222525780.4U CN218771803U (en) | 2022-09-19 | 2022-09-19 | Temperature control panel and voltage-regulating power supply circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN218771803U true CN218771803U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222525780.4U Active CN218771803U (en) | 2022-09-19 | 2022-09-19 | Temperature control panel and voltage-regulating power supply circuit thereof |
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|---|---|
| CN (1) | CN218771803U (en) |
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- 2022-09-19 CN CN202222525780.4U patent/CN218771803U/en active Active
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Denomination of utility model: A temperature control panel and its voltage regulating power circuit Effective date of registration: 20230919 Granted publication date: 20230328 Pledgee: China Everbright Bank Limited by Share Ltd. Xiamen branch Pledgor: XIAMEN LEELEN TECHNOLOGY Co.,Ltd. Registration number: Y2023980057407 |