CN201327595Y

CN201327595Y - Rapid heating and constant-temperature control device

Info

Publication number: CN201327595Y
Application number: CNU2008202354320U
Authority: CN
Inventors: 郭士军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-19
Filing date: 2008-12-19
Publication date: 2009-10-14
Anticipated expiration: 2018-12-19

Abstract

The utility model relates to a rapid heating and constant-temperature control device, which is characterized in that: the device comprises a processor 10, a power circuit 20, a heating load part 30, a LCD 40 and a temperature measuring unit 50, wherein the power circuit 20, the heating load part 30, the LCD 40 and the temperature measuring unit 50 are connected with the processor 10, a thyistor TR1 is connected between the processor 10 and the heating load part 30, a voltage and over-zero detection circuit 60 is connected between the processor 10 and the power circuit 20. The device can make household appliance run at relative stable power, thereby ensuring safety of user and improve using efficiency.

Description

Fast Heating and thermostatically-controlled equipment

[technical field]

The utility model relates to a kind of household electrical appliance control device, particularly relates to a kind of Fast Heating and thermostatically-controlled equipment.

[background technology]

Along with China's science and technology and expanding economy, the improving constantly of living standards of the people, people more and more pay attention to cosmetology.One of device of cosmetology is a heater of hair straightener, and it has the effect with hair straightening.The heater element of existing heater of hair straightener generally adopts the aluminium oxide ceramics heating plate, and its electrothermal calefactive rate is fast, but serviceable life is short, and manufacturing cost is too high, and temperature control system is malfunctioning easily.In addition,, cause the output power instability of heater of hair straightener, hairdressing person's scalp is scalded owing to the difference of environment for use and voltage.The fried food that is loved by the people for another example, its requirement to deep fryer is very high, though deep fryer is various in style at present, but major part only has the function by the oil heating, its control circuit detects because of the zero-point voltage that aligns the negative voltage transition place lacks, cause keeping the oil temperature of deep fryer and use the constant relatively of power, make easily the food zoom or the mouthfeel of exploding out not good.

[summary of the invention]

The utility model is intended to address the above problem, and provides a kind of household electrical appliance that make to move with metastable power, thereby ensures the Fast Heating and the thermostatically-controlled equipment of the service efficiency of user's safety and raising product.

For achieving the above object, the utility model provides a kind of Fast Heating and thermostatically-controlled equipment, it is characterized in that, this device comprises processor and the power circuit that is attached thereto, heating load device, LCD and temperature measuring unit, between processor and heating load device, be connected with controllable silicon TR1, between processor and power circuit, be connected with voltage and zero cross detection circuit.

Voltage and zero cross detection circuit comprise resistance R 33, R34, R35 and commutation diode D33, D35, described commutation diode D33 is connected with processor and power circuit through resistance R 33, R34, the other end of resistance R 33 is connected with+5V direct supply, the end ground connection of commutation diode D35, the other end is connected with power circuit through resistance R 35.

Processor is a single-chip microcomputer, the trigger end of an output port control controllable silicon TR1 of this single-chip microcomputer.

Temperature measuring unit comprises capacitor C 2, thermistor RT1, pull-up resistor R10, wherein, described thermistor RT1 and pull-up resistor R10 and capacitor C 2 are mutually and connect, and be connected with described processor, the other end ground connection of capacitor C 2, the other end of pull-up resistor R10 is connected with+5V direct supply, and temperature measuring unit is under processor control, by the every interval 200Ms of thermistor RT1 to temperature sampling once.

[description of drawings]

Fig. 1 is circuit theory diagrams of the present utility model.

Fig. 2 is the control flow chart of heating load device of the present utility model.

Fig. 3 is a temperature measuring unit circuit diagram of the present utility model.

[embodiment]

The following example is further explanation and the explanation to utility model, and the utility model is not constituted any limitation.

Consult Fig. 1, Fast Heating of the present utility model and thermostatically-controlled equipment comprise processor 10, and the power circuit 20 that is attached thereto, heating load device 30, LCD 40 and temperature measuring unit 50.Described processor 10 is a single-chip microcomputer, and it can be stored with the control program to heating load by commercially available.The trigger end of an output port control controllable silicon TR1 of this single-chip microcomputer.Between processor 10 and power circuit 20, be connected with voltage and zero cross detection circuit 60.Described voltage and zero cross detection circuit 60 comprise resistance R 33, R34, R35 and commutation diode D33, D35, described commutation diode D33 is connected with processor and power circuit 20 through resistance R 33, R34, the other end of resistance R 33 is connected with+5V direct supply, the end ground connection of commutation diode D35, the other end is connected with power circuit 20 through resistance R 35.Described voltage and zero cross detection circuit 60 can be sent to input of single chip by voltage division processing to the alternating voltage from power circuit 20 and carry out analog to digital conversion, can measure the pairing supply voltage of the minimum value of alternating voltage in half period by conversion.The voltage over zero of AC power is that the variation by maximum in the certain voltage scope and minimum value decides.Carry out zero cross fired by the voltage over zero of adjusting AC power, can reduce the harmonic radiation that causes by the non-zero cross fired of silicon controlled.Thereby adjust silicon controlled output and obtain stable output power in the certain voltage scope.Under the control of processor 10, every 125uS to the alternating voltage once sampling.Described temperature measuring unit 50 comprises capacitor C 2, thermistor RT1, pull-up resistor R10, and the temperature element of this temperature measuring unit 50 is the NTC thermistor of precision 1 ~ 3%.Temperature measuring unit 50 by the every interval 200Ms of thermistor RT1 to temperature sampling once, is measured the temperature of heating object under processor 10 controls.Wherein, described thermistor RT1 and pull-up resistor R10 and capacitor C 2 and are connected with described processor mutually and connect, the other end ground connection of capacitor C 2, and the other end of pull-up resistor R10 is connected with+5V direct supply.

The control flow of 10 pairs of heating load devices 30 of described processor is:

A, warm-up phase: the initial stage of heating, can export by the ascending peak power that progressively is amplified to owing to instantaneous high-power heating causes damaging in order to prevent heater members and heating object;

B, heating with full power:, can be heated to certain value rapidly by the mode of the whole conductings of controllable silicon TR1 in order in official hour, to reach the temperature value that sets.

C, brake stage: when the temperature that detects heating object and setting value only differed FV, beginning progressively reduced output power.When reaching the temperature that sets, output power is decremented to zero.

D, constant temperature stage: when reaching the temperature value of setting, under the control of processor, constantly detect the temperature of heating object by thermistor, just stop heating in case exceed setting value, recover heating during low setting value, the big more power of exporting of value that is lower than setting is also big more, and this can guarantee that isothermal reaction is quick.

Claims

1, a kind of Fast Heating and thermostatically-controlled equipment, it is characterized in that, power circuit (20), heating load device (30), LCD (40) and temperature measuring unit (50) that this device comprises processor (10) and is attached thereto, between processor (10) and heating load device (30), be connected with controllable silicon (TR1), between processor (10) and power circuit (20), be connected with voltage and zero cross detection circuit (60).

2, a kind of Fast Heating as claimed in claim 1 and thermostatically-controlled equipment, it is characterized in that, described voltage and zero cross detection circuit (60) comprise resistance (R33, R34, R35) and commutation diode (D33, D35), described commutation diode (D33) is connected with processor and power circuit (20) through resistance (R33, R34), the other end of resistance (R33) is connected with+5V direct supply, one end ground connection of commutation diode (D35), the other end is connected with power circuit (20) through resistance (R35).

3, a kind of Fast Heating as claimed in claim 1 and thermostatically-controlled equipment is characterized in that, described processor (10) is a single-chip microcomputer, the trigger end of an output port control controllable silicon (TR1) of this single-chip microcomputer.

4, a kind of Fast Heating as claimed in claim 1 and thermostatically-controlled equipment, it is characterized in that, described temperature measuring unit (50) comprises electric capacity (C2), thermistor (RT1), pull-up resistor (R10), wherein, described thermistor (RT1) and pull-up resistor (R10) and electric capacity (C2) are mutually and connect, and be connected with described processor, the other end ground connection of electric capacity (C2), the other end of pull-up resistor (R10) is connected with+5V direct supply, temperature measuring unit (50) is under processor (10) control, by the every interval 200Ms of thermistor (RT1) to temperature sampling once.