CN217059099U - High temperature prompting device and high temperature heating equipment - Google Patents

Abstract

The application discloses a high temperature prompting device and high temperature heating equipment, which relate to the field of temperature detection. Including: MCU, thermistor, energy storage device, prompt device, voltage divider resistor. The first end of the energy storage device is connected to the power supply and the power supply end of the MCU, and the second end of the energy storage device is connected to the ground end of the MCU. The power supply end of the MCU sensor is connected to the first end of the thermistor, the feedback end is connected to the second end of the thermistor, and the resistance value is determined by the current flowing through the thermistor. The prompting device is connected to the output end of the MCU, the first end of the voltage dividing resistor is connected to the feedback end and the second end of the thermistor, and the second end is grounded or connected to the power supply end of the sensor. The energy storage device stores electrical energy when it is not powered off. After the power failure, the energy storage device acts as a power source to supply power to the thermistor. The resistance of the thermistor changes with temperature. The MCU detects the current flowing through the thermistor and calculates the current temperature value. When the temperature value is greater than the preset temperature value, the control prompt device will issue a prompt message, so as to avoid the paint not changing color caused by using the equipment for a long time.

Description

A high temperature prompting device and high temperature heating equipment

technical field

The utility model relates to the field of temperature detection, in particular to a high temperature prompting device and a high temperature heating device.

Background technique

With the rise of various high-temperature heating devices in the market, high-temperature heating devices such as heated curling irons, heated straightening combs, and induction cookers are emerging. After the high-temperature heating equipment is used, the equipment will generate a lot of heat in the work project, which will cause the high-temperature heating equipment to heat up, and the temperature will be too high, resulting in the danger of scalding the user. Existing high-temperature heating equipment, after being powered off, generally releases the electrical energy stored in the capacitor within 0.5s due to the limited power storage capacity of the capacitor in the circuit, which cannot support the high-temperature heating equipment to continue to work. Therefore, in order to remind users that the temperature of the high-temperature heating equipment is too high and avoid burns, the high-temperature parts of the high-temperature heating equipment will be painted with paint that changes color when exposed to high temperature, and the color of the paint is used to distinguish whether the high-temperature heating equipment is in a high temperature state or a low temperature state. For example: when the high temperature heating device is in a high temperature state, the paint appears red; when the high temperature heating device is in a low temperature state, the paint appears blue. As the use time of high-temperature heating equipment continues to accumulate, the sensitivity of paint to temperature gradually decreases, and even in the process that the temperature of high-temperature heating equipment changes from high temperature to low temperature or the temperature changes from low temperature to high temperature, the paint does not change color. .

In view of the above-mentioned problems, it is a problem that those skilled in the art strive to solve to find a way to avoid the situation that the paint does not change color due to the use of high-temperature heating equipment for a long time.

Utility model content

The purpose of the utility model is to provide a high temperature prompting device, which can avoid the situation that the paint does not change color due to the use of high temperature heating equipment for a long time.

In order to solve the above problems, the present application provides a high-temperature prompting device including: an MCU, a thermistor, an energy storage device, a prompting device, and a voltage divider resistor;

The first end of the energy storage device is connected to the power supply and the power supply end of the MCU, and is used to store electrical energy when the power is turned on, and the second end of the energy storage device is connected to the power supply and the ground end of the MCU;

The sensor power supply end of the MCU is connected with the first end of the thermistor, and the feedback end of the MCU is connected with the second end of the thermistor, so as to determine the resistance value of the thermistor by the current flowing through the thermistor;

The prompting device is connected to the output end of the MCU, and is used to prompt when the MCU determines that the current temperature value is greater than the preset temperature value;

The first end of the voltage dividing resistor is connected to the feedback end of the MCU and the second end of the thermistor, and the second end of the voltage dividing resistor is grounded and connected to the power supply end of the sensor.

Preferably, it also includes: a first resistor;

The first end of the first resistor is connected to the power supply and the power supply end of the MCU, and the second end of the first resistor is connected to the first end of the energy storage device.

Preferably, the prompting device is an indicator light.

Preferably, the prompting device is a display screen.

Preferably, it also includes: an input device;

The input device is connected to the MCU for adjusting the temperature value.

Preferably, the thermistor is a negative temperature coefficient thermistor.

Preferably, the energy storage device is a supercapacitor.

Preferably, the sensor power supply end of the MCU is connected to the first end of the voltage dividing resistor, and the feedback end of the MCU is connected to the second end of the voltage dividing resistor, for determining the resistance value of the thermistor by the current flowing through the voltage dividing resistor ;

The first end of the thermistor is connected to the feedback end of the MCU and the second end of the voltage dividing resistor, and the second end of the thermistor is grounded or connected to the power supply end of the sensor.

In order to solve the above problems, the present application provides a high-temperature heating device, including the above-mentioned high-temperature prompting device.

In order to solve the above problems, the present application provides a high temperature prompting device, including: MCU, a thermistor, a super capacitor, a prompting device, and a voltage dividing resistor. The first end of the super capacitor is connected to the power supply and the power supply end of the MCU, and is used to store electric energy when the power is turned on, and the second end of the super capacitor is connected to the ground end of the MCU and grounded. The sensor power supply end of the MCU is connected to the first end of the thermistor, and the feedback end of the MCU is connected to the second end of the thermistor, so as to determine the resistance value of the thermistor by the current flowing through the thermistor. The prompting device is connected to the output end of the MCU, and is used to prompt that the current temperature value is greater than the preset temperature value. The first end of the voltage dividing resistor is connected to the feedback end of the MCU and the second end of the thermistor, and the second end of the voltage dividing resistor is grounded or connected to the power supply end of the sensor. Since the supercapacitor stores part of the electrical energy when the high-temperature heating device is not powered off, after the high-temperature heating device is powered off, the supercapacitor acts as a power source to supply power to the thermistor. Since the resistance of the thermistor changes with the temperature, when the super capacitor acts as a power supply to supply power to the thermistor and the MCU, the MCU is used to detect the current flowing through the thermistor, and then the temperature corresponding to the current resistance value of the thermistor is obtained. When the temperature value is greater than the preset temperature value, the MCU controls the prompt device to issue a prompt message, so as to avoid the situation that the paint does not change color due to the long-term use of high-temperature heating equipment.

Description of drawings

In order to explain the embodiments of the present invention more clearly, the following will briefly introduce the accompanying drawings used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are very important in the art. For those of ordinary skill, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a structural diagram of a first high temperature prompting device provided by an embodiment of the application;

FIG. 2 is a structural diagram of a second high temperature prompting device provided by an embodiment of the application;

FIG. 3 is a structural diagram of a third high temperature prompting device provided by an embodiment of the present application.

Among them, 10 is an MCU, 11 is a prompt device, 12 is an energy storage device, and 20 is an input device.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The core of the utility model is to provide a high temperature prompting device and a high temperature heating device.

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

The existing product does not have a high temperature prompting device after unplugging the power, which means that the high temperature prompting function cannot be realized. When the existing high-temperature heating equipment is heated for a long time, for example, the heating curling iron is used after being heated for a long time. Its temperature is as high as 200 degrees or more, and it takes 10 minutes or even 15 minutes to cool down to about 50 degrees after shutdown or power failure. If the user accidentally touches the heated curling iron during this time, it is easy to burn the user. In order to prevent users from being accidentally scalded, the existing practice is to coat the high-temperature parts of the high-temperature heating equipment with paint that changes color in case of high temperature, and distinguish high temperature and low temperature by color. After the high-temperature heating equipment is used for dozens or even hundreds of times, the sensitivity of the paint to temperature is reduced, and the paint gradually loses its color-changing effect on the perception of temperature.

FIG. 1 is a structural diagram of a first high temperature prompting device provided by an embodiment of the present application. In order to solve the above problems, the present application provides a high temperature prompting device, as shown in FIG. 1 , including: an MCU10 , a thermistor Rt, an energy storage device 12 , a prompting device 11 , and a voltage dividing resistor R2 . The first end of the energy storage device 12 is connected to the power supply and the power supply end of the MCU 10 for storing electrical energy when the power is turned on, and the second end of the energy storage device 12 is connected to the power supply and the ground end of the MCU 10 . The sensor power supply terminal of MCU10 is connected to the first terminal of the thermistor Rt, and the feedback terminal of MCU10 is connected to the second terminal of the thermistor Rt, for determining the resistance value of the thermistor Rt by the current flowing through the thermistor Rt , the first end of the voltage dividing resistor R2 is connected to the feedback end of the MCU10 and the second end of the thermistor Rt, and the second end of the voltage dividing resistor R2 is grounded. The prompting device 11 is connected to the output end of the MCU10, and is used for prompting when the MCU10 determines that the current temperature value is greater than the preset temperature value.

It should be noted that, in this embodiment, the MCU 10 may be a single-chip microcomputer, or may be a controller capable of transmitting high and low level signals or data strings or various instructions. And the thermistor Rt may be a resistor whose resistance value decreases as the temperature increases, or a resistor whose resistance value increases as the temperature increases. At the same time, as long as it is an energy storage device or device that can store electrical energy, it can be determined as an implementation according to the specific implementation scenario. Similarly, as long as the prompting device 11 is a device or device that can play a role in prompting the user, it can be determined according to the specific implementation scenario. The embodiment can be a voice player, which sends out voice information for prompting through the voice player; it can also be a display screen, which displays icons on the display screen for prompting, etc. The two prompting methods given above are only one of many embodiments. , and does not limit the prompting device 11 of the present application. In this embodiment, the type of the MCU 10, how the resistance value of the thermistor Rt changes as the temperature increases, and the models and types of the energy storage device 12 and the prompting device 11 are not limited, and their implementation can be determined according to specific implementation scenarios. .

Wherein, as a preferred embodiment, the energy storage device 12 mentioned above may be a super capacitor C1. At this time, since the supercapacitor C1 stores part of the electric energy when the high-temperature heating device is not powered off, after the high-temperature heating device is powered off, the supercapacitor C1 acts as a power source to supply power to the thermistor Rt. Since the resistance of the thermistor Rt changes with the change of temperature, when the super capacitor C1 acts as a power supply to supply the thermistor Rt, the MCU10 is used to detect the current flowing through the thermistor Rt, and then the current resistance value of the thermistor Rt is obtained. For the corresponding temperature value, when the temperature value is greater than the preset temperature value, the MCU 10 controls the prompting device 11 to send out prompting information, so as to avoid the situation that the paint does not change color due to the long-term use of the high-temperature heating equipment.

On the basis of the above embodiment, as a more preferred embodiment, the method further includes: a first resistor R1.

The first end of the first resistor R1 is connected to the power supply and the power supply end of the MCU10, and the second end of the first resistor R1 is connected to the first end of the super capacitor C1.

In this embodiment, in order to prevent the super capacitor C1 mentioned in the above embodiment from generating excessive current in the circuit when the super capacitor C1 is used as a power source to supply power to the high temperature prompting device after a power failure, a first resistor R1 is added. act as a current limiter. In this embodiment, there are no requirements on the resistance value, signal, cross-sectional area, etc. of the first resistor R1, and it is only required that after the current output by the super capacitor C1 as a power source passes through the resistor, the protection circuit can work normally. Will not generate excessive current to make the circuit abnormal.

On the basis of the above embodiment, as a more preferred embodiment, the prompting device 11 is an indicator light or a display screen. In this embodiment, the prompting device 11 is set as an indicator light, so that when the temperature value exceeds the preset temperature value and the user is far away, the indicator light can be turned on and off to observe the temperature of the high-temperature heating device at this time. Whether scalding can be avoided. It should be noted that, in this embodiment, the position where the indicator light is set, the size of the indicator light itself, and the type of the indicator light are not limited, and the implementation mode can be determined according to the specific implementation scenario. Similarly, in this embodiment, the prompting device 11 is set as the display screen so that when the temperature value exceeds the preset temperature value, the user can observe more detailed information, including the specific value of the temperature value or the temperature value and the preset temperature value. difference and other information. It should be noted that, in this embodiment, the position where the display screen is set, the size of the display screen itself, and the type of the display screen are not limited, and the implementation mode can be determined according to the specific implementation scenario. The type of display screen can be LCD screen or LED display screen.

FIG. 2 is a structural diagram of a second high temperature prompting device provided by an embodiment of the present application. On the basis of the above embodiment, as a more preferred embodiment, as shown in FIG. 2 , it further includes: an input device 20;

The input device 20 is connected to the MCU 10 for adjusting the temperature value.

In a practical application scenario, taking the heating curling iron as an example, when the user uses it, to adjust the temperature value suitable for curling hair, the input device 20 provided on the high temperature prompting device is to facilitate the user to adjust the temperature when using the heating curling iron. It should be noted that the input device 20 may be a potentiometer, a button, or a key-in keyboard. The above-mentioned three input devices 20 are some of the various embodiments, and are not specific to the input device. 20 plays a limiting role, as long as a device that can realize the input function is counted as a device included in this application. At the same time, the number of the input device 20 can be one, and each time the temperature adjustment step is 1, the temperature adjustment step value can also be 5, etc., as long as the number of adjustments can be ensured, the temperature for heating the curling iron can be easily reached. The temperature adjustment step value can be adjusted by the user according to the specific implementation scenario; the number of the input device 20 can also be multiple, and the input device 20 can be set as a keyboard style, so as to realize the input digital adjustment heating curling hair The temperature value used by the stick. In this embodiment, the number of the input devices 20 is not limited, and its implementation can be determined according to specific implementation scenarios.

It should be noted that the timer is integrated on the MCU10 chip, and this setting method also realizes the connection between the timer and the MCU10. There is no limit to the longest timing time of the timer, and infinite timing can theoretically be achieved. However, as a more preferred timing method, taking the heating curling iron as an example, the timing time can be set to be slightly longer than the time when the temperature value of the heating curling iron is reduced to the preset temperature value. It should be noted that the timing time can be longer than the heating The time for the temperature value of the curling iron to decrease to the preset temperature value is longer than 1 minute or 5 minutes, etc. There is no limit to how much the timing time is longer than the time for the temperature value of the heated curling iron to decrease to the preset temperature value, and its implementation can be determined according to the specific implementation scenario. In this way, the timing time can also be adjusted by the user. And in this embodiment, there are no restrictions on how to set the timer inside the MCU10 chip, the type and size of the timer, and the length of the timing time, and the implementation can be determined according to the specific implementation scenario. It should be noted that, in order to realize the integration of the timer on the MCU10 chip, the size of the timer should be as small as possible.

On the basis of the above embodiment, as a more preferred embodiment, the thermistor Rt is a negative temperature coefficient type thermistor.

In this embodiment, the thermistor Rt is set as a negative temperature coefficient type thermistor in order to realize the long-life operation of the high temperature prompting device. It should be noted that the most important performance index of NTC thermistor is its service life, and NTC thermistor can withstand various high-precision, high-sensitivity, high-reliability, ultra-high temperature, and high-pressure scenarios. It can achieve continuous and stable work in the above-mentioned usage scenarios.

It should be noted that the negative temperature coefficient thermistor must first ensure its long service life in order to ensure the performance of other properties. Correspondingly, the excellence of other properties depends on the technical level of the production process. When the technical level of the production process reaches a certain level. At this level, it becomes possible to have a long life of the negative temperature coefficient thermistor.

It can be understood that when the negative temperature coefficient thermistor is connected to the MCU10, the MCU10 converts the current value flowing through the negative temperature coefficient thermistor into a voltage value corresponding to the current value, and calculates the voltage value as The current temperature value of the high temperature heating device. Since the NTC thermistor can withstand the test of high precision, high sensitivity, high reliability, ultra-high temperature and high pressure scenarios, when the super capacitor C1 supplies power to the NTC thermistor, the NTC thermistor will The electrical energy consumed by the resistor is very small, so it can be realized that the high temperature prompting device is always in a working state during the process of cooling down the high temperature heating device to the preset temperature value. It should be noted that, when the prompting device 11 in the high-temperature prompting device is in an inactive state, it also indicates that the temperature value of the high-temperature heating device is also reduced to the preset temperature value at this time.

Therefore, in order to ensure the service life of the high temperature prompting device, a negative temperature coefficient thermistor with a longer service life should be set accordingly. At this time, the negative temperature coefficient thermistor has become a suitable way to extend the service life of the high temperature prompting device. device.

FIG. 3 is a structural diagram of a third high temperature prompting device provided by an embodiment of the present application. On the basis of the above embodiment, this embodiment also provides a high temperature prompting device, as shown in FIG. 3 , including: MCU10, thermistor Rt, super capacitor C1, prompting device 11, and voltage dividing resistor R2;

The first end of the supercapacitor C1 is connected to the power supply and the power supply end of the MCU10 for storing electric energy when the power is turned on, and the second end of the supercapacitor C1 is connected to the power supply and the ground end of the MCU10 and grounded. The sensor power supply end of MCU10 is connected to the first end of the voltage dividing resistor R2, and the feedback end of MCU10 is connected to the second end of the voltage dividing resistor R2, which is used to determine the resistance of the thermistor Rt by the current flowing through the voltage dividing resistor R2. value. The prompting device 11 is connected to the output end of the MCU10, and is used for prompting when the MCU10 determines that the current temperature value is greater than the preset temperature value. The first end of the thermistor Rt is connected to the feedback end of the MCU10 and the second end of the voltage dividing resistor R2, and the second end of the thermistor Rt is grounded or connected to the power supply end of the sensor.

Since the supercapacitor C1 stores part of the electric energy when the high-temperature heating device is not powered off, after the high-temperature heating device is powered off, the supercapacitor C1 acts as a power source to supply power to the thermistor Rt. Since the resistance of the thermistor Rt changes with the change of temperature, when the super capacitor C1 acts as a power supply to supply the thermistor Rt, the MCU10 is used to detect the current flowing through the thermistor Rt, and then the current resistance value of the thermistor Rt is obtained. For the corresponding temperature value, when the temperature value is greater than the preset temperature value, the MCU 10 controls the prompting device 11 to send out prompting information, so as to avoid the situation that the paint does not change color due to the long-term use of the high-temperature heating equipment.

Due to the fast charging speed of supercapacitors, for example, after charging for 10s, the stored electrical energy after charging can reach more than 95% of the rated capacity, so when using high-temperature heating equipment, charging the supercapacitor during use can quickly The supercapacitor is full and can store enough electric energy; secondly, the supercapacitor has a long cycle life, which can achieve the purpose of extending the service life of the high temperature prompt device; in addition, the supercapacitor also has the characteristics of strong discharge capacity and simple charging circuit. Such characteristics can realize that when the super capacitor is used as the power supply to supply power to the prompt device 11, the safety factor is high and the energy loss during the discharge process is small. At the same time, the long working time of the super capacitor is used, so that the high temperature prompt device can also be used for a long time. Work.

The embodiments of the high-temperature prompting device are described in detail above, and the present application also provides a corresponding embodiment of a high-temperature prompting device, including all the above-mentioned embodiments of the high-temperature prompting device. It should be noted that the high-temperature prompting device mentioned in this embodiment may be a heating curling iron, a high-temperature hair straightening comb, or an induction cooker, including all high-temperature heating devices that generate high temperature after being powered on and take a certain amount of time to cool down. equipment. There are no limitations on the model, size, and time required for cooling the above-mentioned high temperature prompting device.

The high-temperature prompting device and the high-temperature heating equipment provided by the present utility model have been described in detail above. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present utility model, some improvements and modifications can also be made to the present utility model, and these improvements and modifications also fall into the protection of the claims of the present utility model. within the range.

It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Claims (9)

1. A high temperature prompting device, characterized in that, comprising: an MCU (10), a thermistor, an energy storage device (12), a prompting device (11), and a voltage dividing resistor; The first end of the energy storage device (12) is connected to the power supply and the power supply end of the MCU (10) for storing electrical energy when the power supply is turned on, and the second end of the energy storage device (12) connected with the power supply and the ground terminal of the MCU (10), and grounded; The sensor power supply end of the MCU (10) is connected to the first end of the thermistor, and the feedback end of the MCU (10) is connected to the second end of the thermistor, for The current of the thermistor determines the resistance of the thermistor; The prompting device (11) is connected to the output end of the MCU (10), and is used for prompting when the MCU (10) determines that the current temperature value is greater than the preset temperature value; The first end of the voltage dividing resistor is connected to the feedback end of the MCU (10) and the second end of the thermistor, and the second end of the voltage dividing resistor is grounded or connected to the power supply end of the sensor. 2 . The high temperature prompting device according to claim 1 , further comprising: a first resistor; 2 . The first end of the first resistor is connected to the power supply and the power supply end of the MCU (10), and the second end of the first resistor is connected to the first end of the energy storage device (12). 3. The high temperature prompting device according to claim 1, wherein the prompting device (11) is an indicator light. 4. The high temperature prompting device according to claim 1, wherein the prompting device (11) is a display screen. 5. The high temperature prompting device according to claim 1, characterized in that, further comprising: an input device (20); The input device (20) is connected to the MCU (10) for adjusting the temperature value. 6 . The high temperature prompting device according to claim 1 , wherein the thermistor is a negative temperature coefficient type thermistor. 7 . 7. The high temperature prompting device according to claim 1, wherein the energy storage device (12) is a super capacitor. 8. The high temperature prompting device according to claim 1, characterized in that, the sensor power supply end of the MCU (10) is connected to the first end of the voltage dividing resistor, and the feedback end of the MCU (10) is connected to the first end of the voltage dividing resistor. The second end of the voltage dividing resistor is connected to determine the resistance value of the thermistor through the current flowing through the voltage dividing resistor; The first end of the thermistor is connected to the feedback end of the MCU (10) and the second end of the voltage dividing resistor, and the second end of the thermistor is grounded or connected to the power supply end of the sensor . 9 . A high-temperature heating device, characterized in that , comprising: the high-temperature prompting device according to any one of claims 1 to 8 .

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