CN213069613U

CN213069613U - Miniature intelligent digital display temperature controller

Info

Publication number: CN213069613U
Application number: CN202022205934.2U
Authority: CN
Inventors: 张为民
Original assignee: Shanghai Jiaxi Technology Co ltd
Current assignee: Shanghai Jiaxi Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-04-27
Anticipated expiration: 2030-09-30

Abstract

The utility model relates to a miniature intelligent digital display temperature controller, including the low-voltage direct current source, heated electrical apparatus, its characterized in that: there is a CPU-KF8F2020, and 2 position LED charactron are connected to CPU-KF8F 2020's digital output, and a key switch is connected to CPU-KF8F 2020's switch input end, and CPU-KF8F 2020's temperature sampling end connects the data end of sampling miniature NTC temperature sensor and miniature digital temperature sensor W1, and CPU-KF8F 2020's control output end is by resistance connection NMOS pipe, the utility model has the advantages of low pressure DC power supply, the heating is fast, and is safe and contactless danger, intelligent digital display temperature control process, the temperature that the user can digital settlement heating by oneself, and the digital display difference in temperature is 1 degree, has intelligent overcurrent protection function and heater wire broken string protection function of striking sparks, prevents to overflow the high temperature that produces and the burning that the heater wire broken string probably produced of striking sparks.

Description

Miniature intelligent digital display temperature controller

Technical Field

The utility model relates to a temperature controller, especially a miniature intelligent digital display temperature controller.

Background

All low-pressure heating hot compress that can see in the market at present, the heating protective equipment, the heating pad, wait to heat the product, all are 3 grades or 5 grades of temperature control's controller, the advantage is that the design is simple, it is easy to succeed, the low price, there is the problem that, temperature control precision is poor generates heat more slowly, user experience feels poor, if the heating temperature range is 35-75 degrees, 3 grades of temperature control, the difference in temperature is 20 degrees, 35-55-75, 5 grades of temperature control also has 10 degrees of temperature differences, 35-45-55-65-75, user experience feels very poor, can't reach user's requirement to heating temperature, along with the improvement of living standard, user's urgent need a miniature intelligent digital display temperature's that can accurate control temperature controller, satisfy high-end user's demand.

Disclosure of Invention

The utility model aims at solving the problem that the temperature control difference between the heating products such as the low-pressure heating hot compress, the heating protective tool, the heating pad and the like is large in the prior art, and providing a miniature intelligent digital display temperature controller. The utility model relates to a miniature intelligent digital display temperature controller, including the low-voltage direct current source, heated electrical apparatus, its characterized in that: the digital output end of the heating automatic control chip CPU-KF8F2020 is connected with a 2-bit LED nixie tube, the switch input end of the heating automatic control chip CPU-KF8F2020 is connected with a key switch, the temperature sampling end of the heating automatic control chip CPU-KF8F2020 is connected with the data ends of a sampling micro NTC temperature sensor and a micro digital temperature sensor W1, the control output end of the heating automatic control chip CPU-KF8F2020 is connected with the control electrode of an NMOS tube through a resistor, the control electrode of the NMOS tube is connected with a potential resistor in parallel, the other end of the potential resistor is grounded, the source electrode of the NMOS tube is connected with the grounding end of a heated electric appliance, the drain electrode of the NMOS tube is grounded through a potential resistor, and the current sampling port 17 of the heating automatic control chip CPU-KF8F2020 is connected with the drain electrode of the NMOS tube. The voltage stabilizer of the low-voltage direct current source adopts a voltage stabilizing chip 431. The 2-bit LED nixie tube can be an LCD or other nixie tubes. The 2-bit LED nixie tube can be a 3-bit or multi-bit digital display. The heating automatic control chip CPU-KF8F20202 can be other types of CPUs. The input end of the switch is connected with one to three key switches. The number of the NMOS tubes is 1-3. The NMOS tube can be a PMOS tube or other types of MOS tubes. The heated electric appliances are heating electric appliances such as heating hot compress, heating protective clothing, heating pads, heaters and the like. The low-voltage direct current source is a power adapter, a mobile power supply, a battery pack and a charger baby.

The utility model has the advantages of 1, low voltage direct current supply, fast heating, safety, no electric shock hazard and no ionizing electromagnetic radiation harmful to human body, 2, intelligent digital display temperature control process, wherein a user can set the heating temperature by self, the temperature range is 25-75 degrees, the digital display temperature difference is 1 degree, 3, a micro intelligent digital display temperature controller is designed with an intelligent overcurrent protection function and a heating wire disconnection sparking protection function to prevent the high temperature generated by overcurrent and the combustion possibly generated by heating wire disconnection sparking, 4, the micro intelligent digital display temperature controller adopts a micro NTC temperature sensor and a micro digital temperature sensor, adopts a software temperature correction technology and a micro high-precision reference voltage source, has high control precision, is slightly influenced by the change of the heating voltage and is stable for long-term use, 5, the micro intelligent digital display temperature controller is designed into a micro structure, the device adopts a micro-structure device, the function of hardware is replaced by adopting a software algorithm as far as possible, and the number of the devices is reduced, so that the device is miniaturized, and the device is suitable for being installed on small low-voltage heating hot compress, heating protective tools, heating pads and other heating products used by a human body.

Drawings

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

Detailed Description

Miniature intelligent digital display temperature controller in the picture, including low pressure direct current source 1, heated electrical apparatus 2, its characterized in that: the heating automatic control chip CPU-KF8F 20203 has one heating automatic control chip CPU-KF8F2020 digital output end 4 connected to 2-bit LED nixie tube 16, one key switch 6 connected to the switch input end 5 of the heating automatic control chip CPU-KF8F2020, one temperature sampling end 7 of the heating automatic control chip CPU-KF8F2020 connected to the data end 8 of the sampling micro NTC temperature sensor and the micro digital temperature sensor W1, one control output end 9 of the heating automatic control chip CPU-KF8F2020 connected to the control electrode of the NMOS tube 11 via a resistor 10, one control electrode of the NMOS tube connected to a potential resistor 12, the other end of the potential resistor connected to ground 13, the source of the NMOS tube connected to the ground of the heated electric appliance, and the drain of the NMOS tube connected to ground via a potential resistor 14. The current sampling port 17 of the heating automatic control chip CPU-KF8F2020 is connected with the drain of the NMOS tube. The voltage stabilizer of the low-voltage direct current source adopts a voltage stabilizing chip 43115. The 2-bit LED nixie tube can be an LCD or other nixie tubes. The 2-bit LED nixie tube can be a 3-bit or multi-bit digital display. The heating automatic control chip CPU-KF8F20202 can be other types of CPUs. The input end of the switch is connected with one to three key switches. The number of the NMOS tubes is 1-3. The NMOS tube can be a PMOS tube or other types of MOS tubes. The heated electric appliances are heating electric appliances such as heating hot compress, heating protective clothing, heating pads, heaters and the like. The low-voltage direct current source is a power adapter, a mobile power supply, a battery pack and a charger baby.

Working process (embodiment of fig. 1): the miniature intelligent digital display temperature controller is plugged with a 5V-24V power adapter, the heating temperature required by a user is adjusted by pressing a heating key switch 6 on the controller, the digital display temperature range is 25-75 ℃, the process of automatically and digitally displaying the heating temperature by the miniature intelligent digital display temperature controller after the key switch is loosened for 2 seconds is realized, the heating temperature set by the user is reached, the heating automatic control chip CPU-KF8F2020 automatically controls heating, the 2-bit LED nixie tube 16 digitally displays the heating temperature, the heating temperature is clear at a glance, the required heating temperature can be repeatedly set by the user, the controller can automatically meet the requirements of the user, the heating process and the heating temperature are digitally displayed, the digital display is clear at a glance, the temperature sampling end 7 of the heating automatic control chip CPU-KF8F2020 samples the data of the data end 8 of the miniature NTC temperature sensor and the miniature digital temperature sensor W1, when the sampled temperature is lower than the set temperature value, the control output end 9 of the heating automatic control chip CPU-KF8F2020 drives the NMOS tube T1-3400 to be electrified and heated, the heating hot compress, the heating protective tool, the heating pad and other heating products are heated, when the sampled temperature value is higher than the set temperature value, the control output end 9 of the heating automatic control chip CPU-KF8F2020 drives the NMOS tube T1-3400 to stop heating, in order to achieve a certain temperature control precision, a special temperature control software algorithm is arranged in the heating automatic control chip CPU-KF8F2020, a current sampling port 17 of the heating automatic control chip CPU-KF8F2020 is used for sampling the current value of the potential resistor 14, the overcurrent protection function and the heating wire disconnection and ignition protection function are automatically detected and realized by the software algorithm in the heating automatic control chip CPU-KF8F2020, the heating is immediately stopped heating when a fault is found, and the LED lamp is alarmed, the controller has a timing shutdown function of 2 hours, and when the set timing time is up, the controller automatically shuts off heating. Chips T2-431 are voltage regulators that provide stable operating voltages for the chips.

Claims

1. Miniature intelligent digital display temperature controller, including low-voltage direct current source, heated electrical apparatus, its characterized in that: the digital output end of the heating automatic control chip CPU-KF8F2020 is connected with a 2-bit LED nixie tube, the switch input end of the heating automatic control chip CPU-KF8F2020 is connected with a key switch, the temperature sampling end of the heating automatic control chip CPU-KF8F2020 is connected with the data ends of a sampling micro NTC temperature sensor and a micro digital temperature sensor W1, the control output end of the heating automatic control chip CPU-KF8F2020 is connected with the control electrode of an NMOS tube through a resistor, the control electrode of the NMOS tube is connected with a potential resistor in parallel, the other end of the potential resistor is grounded, the source electrode of the NMOS tube is connected with the grounding end of a heated electric appliance, the drain electrode of the NMOS tube is grounded through a potential resistor, and the current sampling port 17 of the heating automatic control chip CPU-KF8F2020 is connected with the drain electrode of the NMOS tube.

2. The miniature intelligent digital display temperature controller of claim 1, wherein: the voltage stabilizer of the low-voltage direct current source adopts a voltage stabilizing chip 431 or a voltage stabilizing chip of a commercially available model.

3. The miniature intelligent digital display temperature controller of claim 1, wherein: the 2-bit LED nixie tube can be an LCD or a commercially available nixie tube.

4. The miniature intelligent digital display temperature controller of claim 1, wherein: the 2-bit LED nixie tube can be a 3-bit or multi-bit digital display.

5. The miniature intelligent digital display temperature controller of claim 1, wherein: the heating automatic control chip CPU-KF8F20202 can be a CPU of a commercial model.

6. The miniature intelligent digital display temperature controller of claim 1, wherein: the input end of the switch is connected with one to three key switches.

7. The miniature intelligent digital display temperature controller of claim 1, wherein: the number of the NMOS tubes is 1-3.

8. The miniature intelligent digital display temperature controller of claim 1, wherein: the NMOS tube can be a PMOS tube or a MOS tube with a commercially available model.

9. The miniature intelligent digital display temperature controller of claim 1, wherein: the heated electric appliance is used for heating and hot compress, heating protective equipment, a heating pad and a warmer.

10. The miniature intelligent digital display temperature controller of claim 1, wherein: the low-voltage direct current source is a power adapter, a mobile power supply, a battery pack and a charger baby.