CN217185725U

CN217185725U - Self-heating thermos cup

Info

Publication number: CN217185725U
Application number: CN202220072509.7U
Authority: CN
Inventors: 丁智伟; 毛鹏
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Nanjing University of Information Science and Technology
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-08-16
Anticipated expiration: 2032-01-12

Abstract

The utility model discloses a self-heating vacuum cup, belonging to the field of self-heating vacuum cups; the utility model provides a self-heating thermos cup, includes the cup, its characterized in that, the cup includes the drinking cup shell, is equipped with thermal insulation inner wall in the drinking cup shell, is the vacuum cavity between thermal insulation inner wall and the drinking cup shell, and the cup below is equipped with the heating plate, and the cup lower extreme is equipped with the base, is equipped with the lithium cell in the base, and the heating plate is installed on the closed loop circuit of lithium cell, can obtain the temperature that oneself wanted through built-in lithium cell direct on-off control and conveniently carry.

Description

Self-heating thermos cup

Technical Field

The utility model belongs to self-heating thermos cup field, concretely relates to self-heating thermos cup.

Background

In winter, people like to drink hot water in cold weather, but the water temperature of water in a common water cup is greatly influenced by the environment and is easy to become cold, the water temperature is not suitable for people to drink when people want to drink, and the people can easily feel uncomfortable in intestines and stomach. The heat preservation effect of the heat preservation cup is remarkable, so that the temperature of water can be kept for a long time, and the drinkability of the water temperature cannot be guaranteed.

The scheme that present people used adds hot water cup device has a lot ofly, but mostly need look for local power connection and heat, and the direct heating becomes boiling water, like the electric heating drinking cup that is named as an electric heating water cup inner bag structure and has this inner bag structure, application number: CN202120480681.1, this kind of hot water cup system is complicated with high costs, still need to find the place power supply inconvenient, and it is not very can not satisfy above demand well to heat boiled water and drink immediately.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art, this disclosed aim at provides a self-heating thermos cup, has solved among the prior art electric heating kettle and has needed the inconvenient problem of operation of external power supply.

The purpose of the disclosure can be realized by the following technical scheme:

a self-heating vacuum cup comprises a cup body and is characterized in that the cup body comprises a cup shell, a heat-insulating inner wall is arranged in the cup shell, a vacuum cavity is formed between the heat-insulating inner wall and the cup shell, a heating plate is arranged below the cup body, a base is arranged at the lower end of the cup body, a lithium battery is arranged in the base, and the heating plate is installed on a closed loop circuit of the lithium battery;

lithium battery charging circuit: the circuit inlays in the bottom of cup, utilizes lithium cell charging IC (TP4056) to charge lithium cell (3.7V/1200mAh), and available cell-phone power adapter or the treasured that charges directly provide 5V voltage through the USB line and charge for the battery after filtering, and the red LED of D2 is bright during the charging, and the green LED of D1 is bright when charging the end. The magnitude of the charging current can be adjusted according to the RI resistance. The NTC (thermistor) resistor and the R3 resistor are used for dividing voltage together, the voltage is fed back to the chip, the feedback signal can be changed according to the temperature change, and a comparator in the chip can adjust the magnitude of the charging current, so that the charging efficiency is improved.

A booster circuit: the circuit is embedded in the cup bottom, a boost topology circuit, a C5 capacitor, an R4 resistor and a diode D5 are built on the periphery of the integrated power chip CS5171 to serve as a spike pulse absorption circuit, stress on the interior of the chip during boosting can be reduced, the switch is pressed, and the circuit starts to work.

And a protection circuit of a heating body (PTC 12V/220 ℃ dry-burning power is about 6-7W): the circuit is embedded in the cup bottom, a PPTC (self-recovery fuse) is connected in series in an output branch of the booster circuit and then connected with a TVS (transient diode) in parallel to realize an overvoltage and overcurrent protection circuit, and a 12V voltage output is connected to a heating body through the PPTC. If sudden overvoltage can cause the current through the TVS tube to be suddenly increased or the circuit is short-circuited and overcurrent, the PPTC is fused due to overhigh temperature, no output voltage exists, and the purpose of protecting the circuit is achieved.

The warning circuit: the circuit inlays in the bottom of a cup, after the output voltage after the PPTC gathers, the reference voltage who obtains after R5 and R7 resistance voltage division passes through comparator LM393 and Bat voltage comparison, if because the branch road overvoltage leads to the electric current that passes through the TVS pipe to grow suddenly or circuit itself is because the short circuit overflows, PPTC fuses because the temperature is too high at this moment, no output voltage, the Bat voltage is higher than reference voltage this moment, the comparator outputs high level drive D4 warning light LED red and lights, otherwise D4 warning light LED red goes out.

The beneficial effect of this disclosure:

1. the water heater is small in size, easy to carry and rechargeable, can be used for a long time after being fully charged, does not need to find a power supply everywhere, can be charged by a charger, and can be controlled to obtain the water temperature required by the user;

2. the protection circuit is safe to use, the charging current is adjustable, and the energy utilization efficiency is high by adopting the PFC circuit.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the overall circuit architecture of the disclosed embodiment;

FIG. 3 is a schematic diagram of a lithium battery charging circuit according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a boost circuit in accordance with an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a heater protection circuit according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of an alert circuit according to an embodiment of the disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

As shown in fig. 1-6, the self-heating vacuum cup comprises a cup body 1, and is characterized in that the cup body 1 comprises a cup shell 11, a heat-insulating inner wall 12 is arranged in the cup shell 11, a vacuum cavity is formed between the heat-insulating inner wall 12 and the cup shell 11, a heating plate is arranged below the cup body 1, a base 2 is arranged at the lower end of the cup body 1, a lithium battery is arranged in the base 2, and the heating plate is arranged on a closed-loop circuit of the lithium battery; when the water in the water cup is found to be cool and not suitable for drinking, the switch booster circuit is pressed to start working, the voltage of the lithium battery is boosted to 12V through the booster circuit built by the CS5171 chip, the output voltage of 12V firstly passes through the PPTC and then supplies power to the heating body, a TVS tube protection circuit is connected behind the PPTC in parallel, the heating power is about 6-7W when the heating body normally works, the switch can be closed when the water temperature is suitable for drinking, and the circuit stops working. If the circuit itself overflows because of the short circuit because branch road excessive pressure leads to the electric current through TVS pipe grow suddenly because of the branch road excessive pressure or circuit, PPTC does not have output voltage because of the too high fusing of temperature this moment, and Bat voltage is higher than reference voltage this moment, and the comparator outputs high level drive warning light LED red and lights, and the circuit can automatic recovery after troubleshooting this moment, otherwise D4 warning light LED red goes out. If the heating effect of the heating body is not good, the battery is insufficient at the moment, and charging is needed, the battery can be charged by directly providing 5V voltage through a mobile phone power adapter or a charger through a USB (universal serial bus) wire. The red LED lights when charging, and the green LED lights when charging is finished. The charging current and the charging time can be adjusted by changing the RI resistance value. The NTC (thermistor) resistor and the R3 resistor are divided and fed back to the battery management chip TP4056, and the feedback voltage is continuously changed due to the change of the NTC resistance value according to the temperature change, so that the internal integrated comparator of the chip can judge whether the temperature of the battery is too high to adjust the charging current, and the charging efficiency is improved. Green LED is bright after charging, can pull out the charging wire, presses the switch this moment, and the circuit can high-efficient work once more again.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims

1. The utility model provides a self-heating thermos cup, includes cup (1), its characterized in that, cup (1) is equipped with heat preservation inner wall (12) including drinking cup shell (11) in drinking cup shell (11), is the vacuum cavity between heat preservation inner wall (12) and drinking cup shell (11), and cup (1) below is equipped with the heating plate, and cup (1) lower extreme is equipped with base (2), is equipped with the lithium cell in base (2), and the heating plate is installed on the closed loop circuit of lithium cell.

2. The self-heating vacuum cup according to claim 1, wherein the input end of the lithium battery is connected with a lithium battery charging circuit, the output end of the lithium battery is connected with a boosting circuit, the boosting circuit is connected with a heating protection circuit, and the heating protection circuit is connected with a warning circuit.

3. The self-heating thermos cup of claim 2 wherein the lithium battery charging circuit comprises: the battery management chip, input voltage is connected to the Vcc foot of battery management chip, the BAT foot of battery management chip and lithium cell intercommunication, the TEMP of battery management chip connects the output of the NTC sensor of battery, and the NTC sensor is connected with R3 resistance.

4. The self-heating vacuum cup as claimed in claim 3, wherein the voltage boost circuit comprises an integrated power chip CS5171 which builds a boost topology circuit on the periphery, a capacitor C5 and a capacitor C3 are arranged between the boost topology circuit and the heating body in parallel, an inductor L2 is arranged between the capacitor C5 and the capacitor C3, an inductor L2 is connected in parallel with a resistor R4, a resistor R4 is connected in series with a diode D5, and a resistor R4 is connected in parallel with a capacitor C5.

5. A self-heating thermos cup according to claim 4, characterized in that the heating protection circuit comprises a self-recovery fuse, and a transient diode is connected in parallel between the heating body and the 12V voltage in series and the self-recovery fuse.

6. A self-heating thermos cup according to claim 4, characterized in that the base (2) is provided with LED lights of two colors red and green on its side as a charging status indicator light.