CN111673224A - Rechargeable lithium battery electric soldering iron device with temperature adjusting, temperature controlling and constant temperature functions - Google Patents
Rechargeable lithium battery electric soldering iron device with temperature adjusting, temperature controlling and constant temperature functions Download PDFInfo
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- CN111673224A CN111673224A CN202010486834.3A CN202010486834A CN111673224A CN 111673224 A CN111673224 A CN 111673224A CN 202010486834 A CN202010486834 A CN 202010486834A CN 111673224 A CN111673224 A CN 111673224A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 238000005476 soldering Methods 0.000 title claims abstract description 73
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 62
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 51
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 26
- 230000033228 biological regulation Effects 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 59
- 238000001514 detection method Methods 0.000 claims description 46
- 230000009467 reduction Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 101000701286 Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) Alkanesulfonate monooxygenase Proteins 0.000 claims description 2
- 101000983349 Solanum commersonii Osmotin-like protein OSML13 Proteins 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 14
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
- B23K3/03—Soldering irons; Bits electrically heated
- B23K3/0323—Battery-powered soldering irons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
- B23K3/03—Soldering irons; Bits electrically heated
- B23K3/033—Soldering irons; Bits electrically heated comprising means for controlling or selecting the temperature or power
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses a rechargeable lithium battery electric soldering iron device with temperature regulation, temperature control and constant temperature, which monitors the temperature of a built-in thermocouple electric soldering iron in real time through the design of a 32-bit singlechip and an analog circuit; based on the technical optimization of the existing portable electric soldering iron, the temperature is detected in real time by using a thermocouple arranged in the electric soldering iron. Therefore, the boosting of the single lithium battery is realized, the output voltage is controlled to be high or low, and the temperature compensation is realized; and outputting the constant temperature of the electric soldering bit within the full voltage range of the lithium battery. The constant temperature control device is provided with a voltage stabilizing circuit module, and stable power supply voltage required by a single chip microcomputer and a control system is realized by taking electricity from a lithium battery; therefore, the continuous power supply of other modules is achieved, the output power supply can realize stable power supply voltage required by the single chip microcomputer and the control system, the single lithium battery can work at the lowest voltage of 3V, and the single lithium battery can work. The voltage stabilizing circuit module is a key design circuit of the design and aims to stabilize the voltage required by the output circuit.
Description
Technical Field
The application relates to the technical field of circuit application design, in particular to a rechargeable lithium battery electric soldering iron device with temperature regulation, temperature control and constant temperature.
Background
The electric soldering iron is a necessary tool for electronic manufacturing and electric appliance maintenance, mainly used for welding elements and conducting wires, can be divided into an internal heating type electric soldering iron and an external heating type electric soldering iron according to mechanical structures, can be divided into a non-tin-suction type electric soldering iron and a tin-suction type electric soldering iron according to functions, and can be divided into a high-power electric soldering iron and a low-power electric soldering iron according to different purposes. A soldering iron part of an electric soldering iron is a key working part, and a control circuit is designed for setting temperature.
In the existing market, most portable soldering irons controlled by common step-up and step-down circuits or simple switches are short in service time and need to manually control the conduction time or match the output power, so that the soldering iron has the technical defects of poor welding performance of welding spots by using heat capacity of soldering iron heads, low temperature return speed and the like.
Disclosure of Invention
The main objective of this application provides a possess rechargeable lithium cell electric iron device of accuse temperature constant temperature that adjusts temperature to solve present problem.
In order to achieve the above object, the present application provides the following techniques:
a rechargeable lithium battery electric soldering iron device with temperature adjustment, temperature control and constant temperature comprises:
a power supply module: the purpose is to provide an initial power supply to serve a control circuit;
voltage stabilizing circuit module: the purpose is to realize stable power supply voltage required by the single chip microcomputer and the control system by taking electricity from the lithium battery;
a booster circuit module: the purpose is to increase the voltage of the lithium battery to the rated voltage of the soldering iron head;
a control circuit module: the purpose is to control whether the current signal is switched on or off, control the magnitude of the effective value of the output power through the form of PWM, and control the temperature by matching with a singlechip;
the single chip controller: the control and setting are achieved, multiple paths of voltage and current signals are collected, and output current and voltage parameters of an output circuit are controlled and converted through an internal algorithm, so that the temperature of the soldering iron is stabilized within a preset range, and the parameters are displayed on an OLED display screen;
a current detection module: the purpose is to carry out negative feedback control, measure the current passing through the soldering iron head, estimate the whole power and display the power on a screen;
a temperature detection module: the voltage signal of the soldering bit is amplified to be changed into a voltage signal which can be identified by a singlechip ADC (analog to digital converter), the voltage signal is matched with a current signal, temperature reading is realized and displayed on a screen through an internal algorithm, and a negative feedback control signal is obtained and sent;
a screen driving module: the data of the singlechip are displayed on a guarantee circuit on a screen through an external charge pump and an IIC communication principle;
the power supply module is electrically connected with the voltage stabilizing circuit module, and the voltage stabilizing circuit module is respectively electrically connected with the booster circuit module, the single chip microcomputer controller, the current detection module, the temperature detection module and the screen driving module; the booster circuit module is electrically connected with the temperature detection module, the current detection module and the single chip microcomputer controller respectively; the temperature detection module and the current detection module are both electrically connected with the single chip microcomputer controller; the single chip microcomputer controller is electrically connected with the control circuit module, and the current detection module and the single chip microcomputer controller are both electrically connected with the screen driving module.
The technical principle of the invention is as follows:
the technology monitors the temperature of the built-in thermocouple electric soldering iron in real time through the design of the single chip microcomputer and the analog circuit; based on the technical optimization of the existing portable electric soldering iron, the temperature is detected in real time by using a thermocouple arranged in the electric soldering iron. Therefore, the boosting of the single lithium battery is realized, the output voltage is controlled to be high or low, and the temperature compensation is realized; and outputting the constant temperature of the electric soldering bit within the full voltage range of the lithium battery.
The constant temperature control device is provided with a voltage stabilizing circuit module, and stable power supply voltage required by a single chip microcomputer and a control system is realized by taking electricity from a lithium battery; therefore, the continuous power supply of other modules is achieved, the output power supply can realize stable power supply voltage required by the single chip microcomputer and the control system, the single lithium battery can work at the lowest voltage of 3V, and the single lithium battery can work. The voltage stabilizing circuit module is a key design circuit of the design and aims to stabilize the voltage required by the output circuit.
And summarizing the power utilization modules needing boosting, and boosting the voltage of the lithium battery to the rated voltage of the soldering iron head through the boosting circuit module so as to perform feedback boosting on the original voltage again. The control circuit module controls whether the current signal is switched on or off, controls the magnitude of the output power effective value in a PWM mode, and controls the temperature by matching with the singlechip.
The single chip microcomputer controller controls and converts the multi-path voltage and current signals, the output current and the voltage parameters of the output circuit through an internal algorithm, so that the temperature of the soldering iron is stabilized within a certain range, and the parameters are displayed on an OLED display screen to achieve control and setting; the current detection module measures the current passing through the soldering iron head, estimates the whole power and displays the whole power on a screen so as to carry out negative feedback control; the temperature detection module amplifies a weak voltage signal of the soldering bit, the weak voltage signal is changed into a voltage signal which can be identified by the single chip microcomputer ADC, the voltage signal is matched with the current signal, reading of the temperature is achieved through an internal algorithm and displayed on a screen, and a negative feedback control signal is obtained and sent out.
According to the platform discharge characteristic of the lithium battery, constant heating power can be kept in the whole range, and welding materials and welding spots of various sizes can be automatically compensated for temperature, so that constant-temperature welding is realized.
Compared with the prior art, this application can bring following technological effect:
1. the circuit design of the electric soldering iron realizes the voltage boosting of a single lithium battery and the control of the output voltage through the design of the single chip microcomputer and the analog circuit and the real-time monitoring of the temperature of the built-in thermocouple electric soldering iron, thereby realizing the temperature compensation; outputting the constant temperature of the electric soldering bit within the full voltage range of the lithium battery;
2. the design is optimized based on the existing portable electric soldering iron technology, the built-in thermocouple of the electric soldering iron is used for real-time temperature detection, the constant temperature effect of the electric soldering iron powered by the lithium battery can be realized, and the service time of the portable electric soldering iron powered by the lithium battery is prolonged;
3. this electric iron device can keep long-time constant temperature on the flatiron, because the platform discharge characteristic of lithium cell can keep invariable heating power at the full range, to the solder joint of various sizes, welding material can the automatic compensation temperature, realizes the constant temperature welding, and is energy-conserving, high-efficient, is showing the result of use that promotes the user.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic block diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the circuit structure of the power supply module of the present invention;
FIG. 3 is a schematic diagram of a circuit structure of a voltage regulator circuit module according to the present invention;
FIG. 4 is a schematic circuit diagram of a boost circuit module according to the present invention;
FIG. 5 is a schematic circuit diagram of the single-chip controller according to the present invention;
FIG. 6 is a schematic circuit diagram of a control circuit module according to the present invention;
FIG. 7 is a schematic diagram of the circuit structure of the current detection module of the present invention;
FIG. 8 is a schematic diagram of the circuit structure of the temperature detecting module according to the present invention;
fig. 9 is a schematic circuit diagram of the screen driving module according to the present invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
In the application of the embodiment, when the circuit of the attached drawing works, an auxiliary circuit can be loaded for supporting, and for a power supply module, a boosting module, a single chip microcomputer or a screen drive and the like, the designed application circuit can be debugged according to the common electrician operation process in the industry under the permission of the original circuit design, for example, stable output of current and voltage signals, a plug circuit of a chip and the like can be debugged. The electrical components in the drawings can be directly connected and used by comparing with the circuits in the drawings, and the conventional technology in the industry is adopted for realization, without limitation.
As shown in the attached figure 1 of the drawings,
a rechargeable lithium battery electric soldering iron device with temperature adjustment, temperature control and constant temperature comprises:
a power supply module: the purpose is to provide a 12V power supply to serve a control circuit;
voltage stabilizing circuit module: the purpose is to realize stable power supply voltage required by the single chip microcomputer and the control system by taking electricity from the lithium battery;
a booster circuit module: the purpose is to increase the voltage of the lithium battery to the rated voltage of the soldering iron head;
a control circuit module: the purpose is to control whether the current signal is switched on or off, control the magnitude of the effective value of the output power through the form of PWM, and control the temperature by matching with a singlechip;
the single chip controller: the device aims to collect multiple paths of voltage and current signals, control and convert output current and voltage parameters of an output circuit through an internal algorithm, stabilize the temperature of the soldering iron within a certain range, and display the parameters on an OLED display screen to achieve control and setting;
a current detection module: the purpose is to measure the current passing through the soldering iron head, estimate the whole power and display the power on a screen so as to carry out negative feedback control;
a temperature detection module: the aim is that weak voltage signals of the soldering bit are amplified to become voltage signals which can be identified by a singlechip ADC, the voltage signals are matched with current signals, temperature reading and displaying are realized on a screen through an internal algorithm, and negative feedback control signals are obtained and sent;
a screen driving module: the data of the singlechip are displayed on a guarantee circuit on a screen through an external charge pump and an IIC communication principle;
the power supply module is electrically connected with the voltage stabilizing circuit module, and the voltage stabilizing circuit module is respectively electrically connected with the booster circuit module, the single chip microcomputer controller, the current detection module, the temperature detection module and the screen driving module; the booster circuit module is electrically connected with the temperature detection module, the current detection module and the single chip microcomputer controller respectively; the temperature detection module and the current detection module are both electrically connected with the single chip microcomputer controller; the single chip microcomputer controller is electrically connected with the control circuit module, and the current detection module and the single chip microcomputer controller are both electrically connected with the screen driving module.
The technical principle of the invention is as follows:
in the embodiment, the temperature of the built-in thermocouple electric soldering iron is monitored in real time through the design of the 32-bit singlechip and the analog circuit; based on the technical optimization of the existing portable electric soldering iron, the temperature is detected in real time by using a thermocouple arranged in the electric soldering iron. Therefore, the boosting of the single lithium battery is realized, the output voltage is controlled to be high or low, and the temperature compensation is realized; and outputting the constant temperature of the electric soldering bit within the full voltage range of the lithium battery.
The constant temperature control device is provided with a voltage stabilizing circuit module, and stable power supply voltage required by a single chip microcomputer and a control system is realized by taking electricity from a lithium battery; therefore, the continuous power supply of other modules is achieved, the output power supply can realize stable power supply voltage required by the single chip microcomputer and the control system, the single lithium battery can work at the lowest voltage of 3V, and the single lithium battery can work. The voltage stabilizing circuit module is a key design circuit of the design and aims to stabilize the voltage required by the output circuit.
And summarizing the power utilization modules needing boosting, and boosting the voltage of the lithium battery to the rated voltage of the soldering iron head through the boosting circuit module so as to perform feedback boosting on the original voltage again. The control circuit module controls whether the current signal is switched on or off, controls the magnitude of the output power effective value in a PWM mode, and controls the temperature by matching with the singlechip.
The single chip microcomputer controller controls and converts the multi-path voltage and current signals, the output current and the voltage parameters of the output circuit through an internal algorithm, so that the temperature of the soldering iron is stabilized within a certain range, and the parameters are displayed on an OLED display screen to achieve control and setting; the current detection module measures the current passing through the soldering iron head, estimates the whole power and displays the whole power on a screen so as to carry out negative feedback control; the temperature detection module amplifies a weak voltage signal of the soldering bit, the weak voltage signal is changed into a voltage signal which can be identified by the single chip microcomputer ADC, the voltage signal is matched with the current signal, reading of the temperature is achieved through an internal algorithm and displayed on a screen, and a negative feedback control signal is obtained and sent out.
According to the platform discharge characteristic of the lithium battery, constant heating power can be kept in the whole range, and welding materials and welding spots of various sizes can be automatically compensated for temperature, so that constant-temperature welding is realized.
As shown in fig. 2, the power supply module includes a 12V positive power supply, a resistor R11, a buck chip U4, a diode D3, a capacitor C32, an inductor L1, and a BAT output terminal, an output terminal of the 12V positive power supply is electrically connected to an input terminal of the resistor R11, an input terminal of the capacitor C32, and an output terminal of the diode D3, and an output terminal of the resistor R11 is electrically connected to a fourth terminal of the buck chip U4; the input end of the inductor L1 is electrically connected to the first end of the buck chip U4, and the output end of the inductor L1 is electrically connected to the fifth end of the buck chip U4 and the input end of the diode D3; the fifth terminal of the buck chip U4 is electrically connected to the output terminal of the diode D3, and the first terminal of the buck chip U4 and the input terminal of the inductor L1 are both electrically connected to the BAT output terminal.
The purpose of the power supply module is to provide a 12V power supply and serve a control circuit, the voltage reduction chip U4 is a TD type chip series, voltage reduction processing is carried out on a voltage reduction chip U4, a diode D3, a capacitor C32, an inductor L1 and the like, finally, required voltage after voltage reduction is output at the BAT output end, and the external form is equivalent to charging and energy storage of one lithium battery. The data values of the electrical components can be obtained through experiments or calculation, and the existing models can be directly selected for combination and replacement, so that the details are not repeated.
As shown in fig. 3, the voltage regulator circuit module includes a BAT input terminal, a voltage regulator chip U3, a capacitor C7, a capacitor C8, a capacitor C9, and a VCC power supply output terminal, the BAT input terminal is electrically connected to both the first terminal of the voltage regulator chip U3 and the input terminal of the capacitor C7, and the output terminal of the capacitor C7 is grounded; the fourth end of the voltage stabilizing chip U3 is electrically connected with the capacitor C9, and the output end of the capacitor C9 is grounded; the fifth end of the voltage stabilizing chip U3 is electrically connected with the input end of the capacitor C8 and the VCC power output end, and the output end of the capacitor C8 is grounded.
The voltage stabilizing chip U3 is of the R79193 series, and the voltage stabilizing circuit module obtains electricity from the lithium battery to realize stable power supply voltage required by the single chip microcomputer and the control system; therefore, the continuous power supply of other modules is achieved, the output power supply can realize stable power supply voltage required by the single chip microcomputer and the control system, the single lithium battery can work at the lowest voltage of 3V, and the single lithium battery can work. The VCC power supply output end can output the power supply after voltage stabilization, and can supply power for the facilities such as the single chip microcomputer controller, the current detection module, the temperature detection module and the screen drive at constant current.
As shown in fig. 4, the boost circuit module includes a BAT input terminal, an inductor L2, a diode D4, a transistor Q1, a transistor Q2, a boost chip U6, a diode D5, a resistor R24, and the BAT input terminal, the inductor L2, the diode D4, the transistor Q2, and an eighth terminal of the boost chip U6 are electrically connected in sequence; the collector of the triode Q1, the emitter of the triode Q2 and the output end of the inductor L2 are all electrically connected with the sixth end of the boosting chip U6; the fourth end of the boosting chip U6 is electrically connected with the input end of the output end of the diode D5, the first end of the boosting chip U3578 is electrically connected with the output end of the diode D5, and the fourth end of the boosting chip U6 is also electrically connected with a 12V positive power supply; the third end of the boost chip U6 is electrically connected to the input end of the resistor R24, and the output end of the resistor R24 is grounded.
The purpose of the boost chip U6 is to boost the voltage of the lithium battery to the rated voltage of the soldering iron head, and the boost chip U6 with model number AO0406 series is adopted to control the circuit system and control the boost of the voltage accessed by the BAT input end. The boosting chip U6 is connected with the single chip microcomputer controller, and the boosted voltage is adjusted under the control of a control signal of the single chip microcomputer controller to reach the rated voltage required by the soldering bit.
As shown in fig. 5, the single chip microcomputer controller includes a single chip microcomputer chip U1, a single chip microcomputer plug connector P1, a resistor R7, a resistor R10 and a capacitor C5, wherein a first end of the single chip microcomputer plug connector P1, VDD and VDDA ends of the single chip microcomputer chip U1 and an input end of the resistor R10 are electrically connected to the VCC power supply output end; the second end and the third end of the singlechip plug connector P1 are respectively and electrically connected with the PA13 end and the PA14 end of the singlechip chip U1, the output end of the resistor R10 is respectively and electrically connected with the NRST end of the singlechip chip U1 and the input end of the capacitor C5, and the output end of the capacitor C5 is grounded; the B00T0 end of the single chip U1 is electrically connected with the input end of the resistor R7, and the output end of the resistor R7 is grounded; the PWM1 end of the single chip U1 is electrically connected with the second end of the boosting chip U6, and the EN2 end of the single chip U1 is electrically connected with the third end of the boosting chip U6.
The single chip microcomputer controller collects multiple paths of voltage and current signals, controls and converts output current and voltage parameters of the output circuit through an internal algorithm, enables the temperature of the soldering iron to be stabilized within a certain range, and is responsible for displaying the parameters on an OLED display screen to achieve control and setting; singlechip chip U1 installs on singlechip plug connector P1, singlechip plug connector P1 is the Header4 model commonly used, STM32 series is selected to this singlechip chip U1, the VCC power output end that adopts voltage stabilizing circuit module supplies power, the second end of chip U6 that steps up is connected to singlechip chip U1's PWM1 end electric connection, singlechip chip U1's EN2 end electric connection third end of chip U6 that steps up, aim at output circuit's output current, voltage parameter controls, the conversion, make the flatiron temperature stabilize in certain scope.
In the singlechip control circuit, three SW-PB type switches are adopted to control port signals of PA2, PA1 and PF1 of a singlechip chip U1 respectively, the output ends of the three SW-PB type switches are SW1, SW2 and SW3 respectively, and three ports of PA2, PA1 and PF1 are connected with corresponding SW1, SW2 and SW3 respectively.
As shown in fig. 6, the control circuit module includes a resistor R14, a resistor R15, a resistor R28, and a driving chip U5, a PWM3 terminal of the single chip U1 is electrically connected to an input terminal of the resistor R14, an output terminal of the resistor R14 is electrically connected to both the input terminal of the resistor R15 and an NG terminal of the driving chip U5, an output terminal of the resistor R15 is grounded, a PS terminal of the driving chip U5 is electrically connected to an input terminal of the resistor R28, and an output terminal of the resistor R28 is electrically connected to an ND terminal of the driving chip U5; the PD terminals of the driver chip U5 collectively serve as a control current signal output terminal IRONP.
The PWM3 end of the single chip U1 is electrically connected with the input end of the resistor R14, and the single chip U1 controls the size of the effective value of the output power in a PWM mode and controls the temperature by matching with the control circuit module. The driving chip U5 is an ADP3001A type, an output end of a resistor R14 of the control circuit module is electrically connected with an input end of the resistor R15 and an NG end of the driving chip U5, an output end of a resistor R15 is grounded, a PS end of the driving chip U5 is electrically connected with an input end of the resistor R28, and an output end of the resistor R28 is electrically connected with an ND end of the driving chip U5. Therefore, under the control of the single chip microcomputer, the PD end of the output driving chip U5 is jointly used as a control current signal output end IRONP, and finally the driving chip U5 outputs a control current signal and sends the control current signal to the current detection module and the temperature detection module, so that current and temperature detection is carried out, and overload or high temperature of the electric soldering iron is avoided.
As shown in fig. 7, the current detection module includes a capacitor C3, a resistor R8, a diode D1, an operational amplifier U2A, a resistor R5, and a capacitor C1, an output terminal of the VCC power supply is electrically connected to a non-inverting input terminal of the operational amplifier U2A, an output terminal of the operational amplifier U2A is electrically connected to an input terminal of the resistor R5, an output terminal of the resistor R5 is electrically connected to an output terminal of the capacitor C1 and is also electrically connected to a TEMPR terminal of the monolithic processor chip U1, and an output terminal of the capacitor C1 is grounded; the control current signal output end IRONP is electrically connected with the input end of the capacitor C3 and the input end of the resistor R8, the output end of the resistor R8 is electrically connected with the input end of the diode D1 and the third end of the operational amplifier U2A, and the output end of the diode D1, the output end of the capacitor C3 and the inverting end of the operational amplifier U2A are all grounded.
The current detection module adopts an operational amplifier U2A to carry out current control regulation on a control current signal output by the drive chip U5, the operational amplifier U2A adopts an LMV358MM/NOPB model, and the operational amplifier U2A measures the current passing through the soldering bit, estimates the overall power and displays the overall power on a screen so as to carry out negative feedback control. The negative feedback data processed by the current detection module is output to a TEMPR end of the singlechip chip U1, and meanwhile, the data of part of the soldering iron tips are fed back and displayed on a screen driver.
As shown in fig. 8, the temperature detection module includes a capacitor C4, a resistor R9, a diode D2, an operational amplifier U2B, a resistor R6 and a capacitor C2, the VCC power supply output terminal is electrically connected to the non-inverting input terminal of the operational amplifier U2B, the output terminal of the operational amplifier U2B is electrically connected to the input terminal of the resistor R6, the output terminal of the resistor R6 is electrically connected to the output terminal of the capacitor C2 and is also electrically connected to the CUR terminal of the single chip U1, and the output terminal of the capacitor C2 is grounded; the control current signal output end IRONP is electrically connected with the input end of the capacitor C4 and the input end of the resistor R9, the output end of the resistor R9 is electrically connected with the input end of the diode D2 and the fifth end of the operational amplifier U2B, and the output end of the diode D2, the output end of the capacitor C4 and the inverting end of the operational amplifier U2B are all grounded.
The temperature detection module adopts the fortune ware U2B to carry out current control regulation to the control current signal of drive chip U5 output, fortune ware U2B adopts LMV358MM NOPB model, fortune ware U2B amplifies the weak voltage signal of soldering bit, becomes the voltage signal that singlechip ADC can discern, cooperates with the current signal, through internal algorithm, realizes reading and showing on the screen of temperature, acquires and sends negative feedback control signal. And the negative feedback data processed by the temperature detection module is output to the CUR end of the singlechip chip U1, and the temperature data of the soldering iron tip is fed back and displayed on a screen drive.
As shown in fig. 9, the screen driving module includes a single chip microcomputer plug connector P3, a resistor R19, a resistor R20, a resistor R23, a diode D7 and a capacitor C19, an output terminal of the VCC power supply is electrically connected to an input terminal of the resistor R19, an input terminal of the resistor R20, an input terminal of the resistor R23 and an output terminal of the diode D7, an output terminal of the resistor R23, an input terminal of the diode D7 and an input terminal of the capacitor C19 are electrically connected to a ninth terminal of the single chip microcomputer plug connector P3, and an output terminal of the capacitor C19 is grounded; the SCL port and the SDA port of the single-chip microcomputer U1 are respectively and electrically connected with the SCL port and the SDA port of the single-chip microcomputer plug-in connector P3.
The screen drive module adopts the VCC power supply of voltage stabilizing circuit module to supply power work, and SCL port and SDA port of singlechip chip U1 correspond SCL port and SDA port of electric connection singlechip plug connector P3 respectively, through outside charge pump and IIC communication principle, show the data display of singlechip on the guarantee circuit on the screen.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. The utility model provides a possess rechargeable lithium cell electric iron device of accuse temperature constant temperature that adjusts temperature which characterized in that includes:
a power supply module: the purpose is to provide an initial power supply to serve a control circuit;
voltage stabilizing circuit module: the purpose is to realize stable power supply voltage required by the single chip microcomputer and the control system by taking electricity from the lithium battery;
a booster circuit module: the purpose is to increase the voltage of the lithium battery to the rated voltage of the soldering iron head;
a control circuit module: the purpose is to control whether the current signal is switched on or off, control the magnitude of the effective value of the output power through the form of PWM, and control the temperature by matching with a singlechip;
the single chip controller: the control and setting are achieved, multiple paths of voltage and current signals are collected, output current and voltage parameters of an output circuit are controlled and converted through an internal algorithm, the temperature of the soldering iron is stabilized within a preset range, and the parameters are displayed on an OLED display screen;
a current detection module: the purpose is to carry out negative feedback control, measure the current passing through the soldering iron head, estimate the whole power and display the power on a screen;
a temperature detection module: the voltage signal of the soldering bit is amplified to be changed into a voltage signal which can be identified by a singlechip ADC (analog to digital converter), the voltage signal is matched with a current signal, temperature reading is realized and displayed on a screen through an internal algorithm, and a negative feedback control signal is obtained and sent;
a screen driving module: the data of the singlechip are displayed on a guarantee circuit on a screen through an external charge pump and an IIC communication principle;
the power supply module is electrically connected with the voltage stabilizing circuit module, and the voltage stabilizing circuit module is respectively electrically connected with the booster circuit module, the single chip microcomputer controller, the current detection module, the temperature detection module and the screen driving module; the booster circuit module is electrically connected with the temperature detection module, the current detection module and the single chip microcomputer controller respectively; the temperature detection module and the current detection module are both electrically connected with the single chip microcomputer controller; the single chip microcomputer controller is electrically connected with the control circuit module, and the current detection module and the single chip microcomputer controller are both electrically connected with the screen driving module.
2. The rechargeable lithium battery electric soldering iron device with the functions of temperature regulation, temperature control and constant temperature of claim 1, wherein the power supply module comprises a 12V positive power supply, a resistor (R11), a voltage reduction chip (U4), a diode (D3), a capacitor (C32), an inductor (L1) and a BAT output end, the output end of the 12V positive power supply is electrically connected with the input end of a resistor (R11), the input end of a capacitor (C32) and the output end of a diode (D3), and the output end of the resistor (R11) is electrically connected with the fourth end of the voltage reduction chip (U4); the input end of the inductor (L1) is respectively and electrically connected with the first end of the buck chip (U4), and the output end of the inductor (L1) is electrically connected with the fifth end of the buck chip (U4) and the input end of the diode (D3); the fifth end of the buck chip (U4) is electrically connected with the output end of the diode (D3), and the first end of the buck chip (U4) and the input end of the inductor (L1) are both electrically connected with the BAT output end.
3. The rechargeable lithium battery electric soldering iron device with the functions of temperature regulation, temperature control and constant temperature of claim 1 or 2, wherein the voltage stabilizing circuit module comprises a BAT input end, a voltage stabilizing chip (U3), a capacitor (C7), a capacitor (C8), a capacitor (C9) and a VCC power supply output end, the BAT input end is electrically connected with the first end of the voltage stabilizing chip (U3) and the input end of the capacitor (C7), and the output end of the capacitor (C7) is grounded; the fourth end of the voltage stabilizing chip (U3) is electrically connected with a capacitor (C9), and the output end of the capacitor (C9) is grounded; the fifth end of the voltage stabilizing chip (U3) is electrically connected with the input end of the capacitor (C8) and the VCC power supply output end, and the output end of the capacitor (C8) is grounded.
4. The rechargeable lithium battery electric soldering iron device with the functions of temperature regulation, temperature control and constant temperature of claim 3, wherein the boost circuit module comprises a BAT input end, an inductor (L2), a diode (D4), a triode (Q1), a triode (Q2), a boost chip (U6), a diode (D5), a resistor (R24), and the BAT input end, the inductor (L2), the diode (D4), the triode (Q2) and an eighth end of the boost chip (U6) are electrically connected in sequence; the collector of the triode (Q1), the emitter of the triode (Q2) and the output end of the inductor (L2) are all electrically connected with the sixth end of the boosting chip (U6); the fourth end of the boosting chip (U6) is electrically connected with the input end of the output end of the diode (D5), the first end of the boosting chip (U6) is electrically connected with the output end of the diode (D5), and the fourth end of the boosting chip (U6) is also electrically connected with a 12V positive power supply; the third end of the boosting chip (U6) is electrically connected with the input end of the resistor (R24), and the output end of the resistor (R24) is grounded.
5. The rechargeable lithium battery electric soldering iron device with temperature adjustment, temperature control and constant temperature functions as claimed in claim 4, wherein the single chip microcomputer controller comprises a single chip microcomputer chip (U1), a single chip microcomputer plug connector (P1), a resistor (R7), a resistor (R10) and a capacitor (C5), and the first end of the single chip microcomputer plug connector (P1), the VDD and VDDA ends of the single chip microcomputer chip (U1) and the input end of the resistor (R10) are electrically connected with the VCC power output end; the second end and the third end of the singlechip plug connector (P1) are respectively and electrically connected with the PA13 end and the PA14 end of the singlechip chip (U1), the output end of the resistor (R10) is respectively and electrically connected with the NRST end of the singlechip chip (U1) and the input end of the capacitor (C5), and the output end of the capacitor (C5) is grounded; the B00T0 end of the single chip (U1) is electrically connected with the input end of a resistor (R7), and the output end of the resistor (R7) is grounded; the PWM1 end of the single chip (U1) is electrically connected with the second end of the boost chip (U6), and the EN2 end of the single chip (U1) is electrically connected with the third end of the boost chip (U6).
6. The rechargeable lithium battery electric soldering iron device with the functions of temperature adjustment, temperature control and constant temperature as claimed in claim 5, wherein the control circuit module comprises a resistor (R14), a resistor (R15), a resistor (R28) and a driving chip (U5), the PWM3 end of the single chip microcomputer chip (U1) is electrically connected with the input end of the resistor (R14), the output end of the resistor (R14) is electrically connected with the input end of the resistor (R15) and the NG end of the driving chip (U5), the output end of the resistor (R15) is grounded, the PS end of the driving chip (U5) is electrically connected with the input end of the resistor (R28), and the output end of the resistor (R28) is electrically connected with the ND end of the driving chip (U5); the PD ends of the driving chips (U5) are used as a control current signal output end (IRONP) together.
7. The rechargeable lithium battery electric soldering iron device with the functions of temperature adjustment, temperature control and constant temperature of claim 6, wherein the current detection module comprises a capacitor (C3), a resistor (R8), a diode (D1), an operational amplifier (U2A), a resistor (R5) and a capacitor (C1), the output end of the VCC power supply is electrically connected with the non-inverting input end of the operational amplifier (U2A), the output end of the operational amplifier (U2A) is electrically connected with the input end of the resistor (R5), the output end of the resistor (R5) is electrically connected with the output end of the capacitor (C1) and simultaneously electrically connected with the TEMPR end of the singlechip chip (U1), and the output end of the capacitor (C1) is grounded; the control current signal output end (IRONP) is electrically connected with the input end of the capacitor (C3) and the input end of the resistor (R8), the output end of the resistor (R8) is electrically connected with the input end of the diode (D1) and the third end of the operational amplifier (U2A), and the output end of the diode (D1), the output end of the capacitor (C3) and the inverting end of the operational amplifier (U2A) are all grounded.
8. The rechargeable lithium battery electric soldering iron device with the functions of temperature adjustment, temperature control and constant temperature of claim 7, wherein the temperature detection module comprises a capacitor (C4), a resistor (R9), a diode (D2), an operational amplifier (U2B), a resistor (R6) and a capacitor (C2), the VCC power output end is electrically connected with the non-inverting input end of the operational amplifier (U2B), the output end of the operational amplifier (U2B) is electrically connected with the input end of the resistor (R6), the output end of the resistor (R6) is electrically connected with the output end of the capacitor (C2) and is simultaneously electrically connected with the CUR end of the singlechip chip (U1), and the output end of the capacitor (C2) is grounded; the control current signal output end (IRONP) is electrically connected with the input end of the capacitor (C4) and the input end of the resistor (R9), the output end of the resistor (R9) is electrically connected with the input end of the diode (D2) and the fifth end of the operational amplifier (U2B), and the output end of the diode (D2), the output end of the capacitor (C4) and the inverting end of the operational amplifier (U2B) are all grounded.
9. The rechargeable lithium battery electric soldering iron device with functions of temperature adjustment, temperature control and constant temperature of claim 8, wherein the screen driving module comprises a single chip microcomputer plug connector (P3), a resistor (R19), a resistor (R20), a resistor (R23), a diode (D7) and a capacitor (C19), the VCC power output end is electrically connected with the input end of the resistor (R19), the input end of the resistor (R20), the input end of the resistor (R23) and the output end of the diode (D7), the output end of the resistor (R23), the input end of the diode (D7) and the input end of the capacitor (C19) are electrically connected with the ninth end of the single chip microcomputer plug connector (P3), and the output end of the capacitor (C19) is grounded; the SCL port and the SDA port of the single chip microcomputer chip (U1) are respectively and correspondingly electrically connected with the SCL port and the SDA port of the single chip microcomputer plug connector (P3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010486834.3A CN111673224A (en) | 2020-06-01 | 2020-06-01 | Rechargeable lithium battery electric soldering iron device with temperature adjusting, temperature controlling and constant temperature functions |
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| CN202010486834.3A CN111673224A (en) | 2020-06-01 | 2020-06-01 | Rechargeable lithium battery electric soldering iron device with temperature adjusting, temperature controlling and constant temperature functions |
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Cited By (1)
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