Control circuit of electric water heating cup
By adopting a spiral heating circuit and a temperature detection control system in the electric hot water cup, the problem of slow heating of the electric hot water cup is solved, and rapid and uniform heating is achieved.
Patent Information
- Application Number
- CN202422542463.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The existing electric water cups have a slow heating rate and cannot achieve rapid heating.
A heating circuit arranged on the outside of the inner liner and on the bottom of the inner liner is adopted, and the AC power supply is converted into a DC power supply with a preset voltage threshold value, and the on-off of the heating circuit is controlled through the driving circuit, and a temperature detection and control circuit is equipped to achieve precise control of heating.
The heating surface and heating uniformity of the inner liner are improved, the heat transfer speed is greatly improved, and rapid heating is achieved.
Smart Images
Figure CN223155420U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electric water cups, and particularly to the control circuit of electric water cups. Background Art
[0002] In recent years, with the improvement of people's living standards and the pursuit of a healthy lifestyle, electric water cups have been introduced in the market. Their original design intention is to meet the need for people to enjoy clean and hygienic boiled water anytime and anywhere in different situations such as traveling, business trips, and working. And due to the significant advantages of simple use and convenient carrying, they have gradually become an indispensable household appliance in people's daily lives.
[0003] However, for the existing electric water cups, whether they are connected to alternating current or direct current, their heating rates are relatively slow and they cannot achieve rapid heating. Therefore, technicians in this field urgently need to develop an electric water cup that can rapidly heat up to meet the actual use requirements. Utility Model Content
[0004] To achieve the above object, the present utility model provides a control circuit of an electric water cup. The electric water cup includes an inner container, and the control circuit includes:
[0005] A power supply circuit, the input end of the power supply circuit is used to connect to an AC power supply, and the power supply circuit is used to convert the AC power supply into a DC power supply with a preset voltage threshold;
[0006] A drive circuit, the first input end of the drive circuit is connected to the output end of the power supply circuit, and the second input end of the drive circuit is connected to the AC power supply;
[0007] A heating circuit, the heating circuit is spirally wound around the outside of the inner container, the heating circuit is arranged at the bottom of the inner container, the heating circuit is electrically connected to the output end of the drive circuit, and the heating circuit is used to heat the inner container;
[0008] A temperature detection circuit, the temperature detection circuit is used to detect the temperature of the liquid in the inner container and output a corresponding temperature signal;
[0009] A control circuit, the input end of the control circuit is connected to the output end of the temperature detection circuit, the output end of the control circuit is connected to the controlled end of the drive circuit, and the control circuit is used to control the drive circuit to drive the heating circuit to work or control the drive circuit to stop driving the heating circuit to work according to the temperature signal.
[0010] Optionally, the heating circuit includes:
[0011] A DC heating film, the input end of the DC heating film is connected to the first output end of the driving circuit, the DC heating film is spirally wound around the outside of the inner container, and the DC heating film is used to heat the inner container under the driving action of the driving circuit to heat the liquid in the inner container.
[0012] Optionally, the driving circuit includes:
[0013] A DC driving circuit, the controlled end of the DC driving circuit is connected to the first output end of the control circuit, the input end of the DC driving circuit is connected to the output end of the power supply circuit, the output end of the DC driving circuit is connected to the DC heating film, and the DC driving circuit is used to conduct or cut off the path between the output end of the power supply circuit and the DC heating film under the control of the control circuit.
[0014] Optionally, the DC driving circuit includes:
[0015] A first switching tube, a third resistor is connected between the controlled end of the first switching tube and the first output end of the control circuit, and a fourth resistor is connected between the controlled end of the first switching tube and the second conducting end;
[0016] A heating film connection terminal, the heating film connection terminal is electrically connected to the DC heating film, and the second end of the heating film connection terminal is connected to the first conducting end of the first switching tube.
[0017] Optionally, the heating circuit includes:
[0018] An AC heating tube, the input end of the AC heating tube is connected to the first output end of the driving circuit, the AC heating tube is arranged at the bottom of the inner container, and the AC heating tube is used to heat the bottom of the inner container under the driving action of the driving circuit to heat the liquid in the inner container.
[0019] Optionally, the driving circuit includes:
[0020] An AC driving circuit, the controlled end of the AC driving circuit is connected to the second output end of the control circuit, the input end of the AC driving circuit is used to connect to the AC power supply, the output end of the AC driving circuit is connected to the AC heating tube, and the AC driving circuit is used to conduct the path between the AC power supply and the AC heating tube under the control of the control circuit to enable the AC heating tube to work.
[0021] Optionally, the AC driving circuit includes:
[0022] A thyristor output optocoupler, a first resistor is connected between the first controlled end of the thyristor output optocoupler and the second output end of the control circuit, and the second controlled end of the thyristor output optocoupler is connected to the output end of the power supply circuit;
[0023] A thyristor, a second resistor is connected between the controlled end of the thyristor and the output end of the thyristor output optocoupler, the first conducting end of the thyristor is used to access the AC power supply, and the second conducting end of the thyristor is electrically connected to the AC heating tube.
[0024] Optionally, the power supply circuit includes:
[0025] A filter circuit, the input end of the filter circuit accesses the AC power supply, and the filter circuit is used to filter the AC power supply;
[0026] A buck circuit, the input end of the buck circuit is connected to the output end of the filter circuit, and the output end of the buck circuit outputs a DC power supply with a preset voltage threshold;
[0027] Wherein, the buck circuit includes:
[0028] A buck chip, the input end of the buck chip is connected to the output end of the filter circuit, and the output end of the buck chip outputs a DC power supply with a preset voltage threshold.
[0029] Optionally, the power supply circuit includes:
[0030] A rectifier circuit, the rectifier circuit is used to access the AC power supply;
[0031] A buck circuit, the input end of the buck circuit is connected to the output end of the rectifier circuit, and the buck circuit is used to step down the rectified AC voltage and output a DC power supply with a preset voltage threshold.
[0032] Optionally, the buck circuit includes:
[0033] A transformer, the primary winding of the transformer is connected to the output end of the rectifier circuit;
[0034] An output rectifier diode, the positive pole of the output rectifier diode is connected to the first secondary winding of the transformer, and the negative pole of the output rectifier diode outputs a DC power supply with a preset voltage threshold;
[0035] A feedback circuit, the input end of the feedback circuit is connected to the output end of the rectifier circuit, and the output end of the feedback circuit is connected to the exciting winding of the transformer.
[0036] The utility model realizes the control of the operation of the heating circuit by arranging the heating circuit spirally around the outer side of the inner container and at the bottom of the inner container, then providing a power supply circuit to access an AC power supply, converting the AC power supply into a DC power supply with a preset voltage threshold, turning on or off the connection between the power supply circuit and the heating circuit through a driving circuit, then providing a temperature detection circuit to detect the temperature of the liquid in the inner container, and finally providing a control circuit to receive the temperature signal output by the temperature detection circuit and control the driving circuit to turn on or off the connection between the power supply circuit and the heating circuit according to the temperature signal. Moreover, since the heating circuit is spirally arranged around the outer side of the inner container and at the bottom of the inner container, the heat receiving surface of the inner container can be wider and more uniform, so that the liquid in the inner container can be quickly heated, and the heat transfer speed is greatly improved. Description of the Drawings
[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0038] Figure 1 It is a circuit block diagram of the control circuit of an electric water cup according to an embodiment of the present application.
[0039] Figure 2 It is Figure 1 the first circuit block diagram of the heating circuit in
[0040] Figure 3 It is Figure 1 the first circuit block diagram of the driving circuit in
[0041] Figure 4 It is Figure 3 the circuit schematic diagram of the DC driving circuit in
[0042] Figure 5 It is Figure 1 the second circuit block diagram of the heating circuit in
[0043] Figure 6 It is Figure 1 the second circuit block diagram of the driving circuit in
[0044] Figure 7 It is Figure 6 the circuit schematic diagram of the AC driving circuit in
[0045] Figure 8 It is Figure 1 the first circuit block diagram of the power supply circuit in
[0046] Figure 9 is Figure 8 the detailed circuit schematic diagram.
[0047] Figure 10 is Figure 1 the second circuit block diagram of the power supply circuit in
[0048] Figure 11 is Figure 10 the detailed circuit schematic diagram.
[0049] Figure 12 is Figure 1 the circuit schematic diagram of the temperature detection circuit in
[0050] Figure 13 is the circuit schematic diagram of the USB input circuit.
[0051] Explanation of the reference numerals in the attached drawings:
[0052] Reference Label Name Reference Label Name 10 Power Circuit 22 AC Drive Circuit 11 Filter Circuit 30 Control Circuit 12 Step-down Circuit 40 Heating Circuit 121 Feedback Circuit 41 DC Heating Film 13 Rectifier Circuit 42 AC Heating Tube 20 Drive Circuit 50 Temperature Detection Circuit 21 DC Drive Circuit - - Specific implementation manners
[0053] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0054] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0055] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.
[0056] The main solution of the embodiment of the present application is: by winding the heating circuit in a spiral shape outside the inner container and arranging it at the bottom of the inner container, then providing a power supply circuit to access the AC power supply, and converting the AC power supply into a DC power supply with a preset voltage threshold, and by driving the circuit to conduct or disconnect the connection between the power supply circuit and the heating circuit, then providing a temperature detection circuit to detect the temperature of the liquid in the inner container, and finally providing a control circuit to receive the temperature signal output by the temperature detection circuit, and according to this temperature signal, control the driving circuit to conduct or disconnect the connection between the power supply circuit and the heating circuit, so as to realize the control of the operation of the heating circuit, and because the heating circuit is wound in a spiral shape outside the inner container and arranged at the bottom of the inner container.
[0057] Due to the slow heating rate of the existing electric water cups whether they are connected to AC power or DC power, rapid heating cannot be achieved.
[0058] The present application provides a solution that can make the heat receiving surface of the inner container wider and more uniform, so that the liquid in the inner container can be rapidly heated, and the heat transfer speed is greatly improved.
[0059] Refer to Figure 1 , in an embodiment of the present invention, the control circuit 30 of the electric water cup includes a power supply circuit 10, a driving circuit 20, a heating circuit 40, a temperature detection circuit 50 and a control circuit 30, where:
[0060] The input end of the power supply circuit 10 is used to access the AC power supply, and the power supply circuit 10 is used to convert the AC power supply into a DC power supply with a preset voltage threshold; the first input end of the driving circuit 20 is connected to the output end of the power supply circuit 10, and the second input end of the driving circuit 20 accesses the AC power supply; the heating circuit 40 is wound in a spiral shape outside the inner container, the heating circuit 40 is arranged at the bottom of the inner container, the heating circuit 40 is electrically connected to the output end of the driving circuit 20, and the heating circuit 40 is used to heat the inner container; the temperature detection circuit 50 is used to detect the temperature of the liquid in the inner container and output a corresponding temperature signal; the input end of the control circuit 30 is connected to the output end of the temperature detection circuit 50, and the output end of the control circuit 30 is connected to the controlled end of the driving circuit 20, and the control circuit 30 is used to control the driving circuit 20 to drive the heating circuit 40 to work or control the driving circuit 20 to stop driving the heating circuit 40 to work according to the temperature signal.
[0061] In this embodiment, the power supply circuit 10 may include a rectifier bridge and a filter capacitor. The rectifier bridge is used to convert the AC power supply into pulsating direct current, and the filter capacitor is used to smooth the pulsating direct current to obtain a stable DC power supply. In addition, the power supply circuit 10 may further include a voltage regulation module to ensure the stability of the output voltage. Alternatively, the power supply circuit 10 may adopt an AC-DC buck chip U1 or a DC-DC buck chip U1 to achieve a stable DC power supply output under a wide range of voltages.
[0062] Among them, the drive circuit 20 may adopt a power transistor, such as a MOSFET, a thyristor BT1, or an IGBT, as a switching element, and drive the heating circuit 40 by controlling its conduction and cutoff. The helical resistance wire in the heating circuit 40 may be made of nickel-chromium alloy or other materials suitable for heating to ensure efficient and uniform heating effects.
[0063] Among them, the temperature detection circuit 50 generally includes a temperature sensor, such as an NTC thermistor or a PTC thermistor, which can change its resistance value according to the temperature change, thereby outputting an electrical signal proportional to the temperature. The control circuit 30 may adopt a dedicated temperature control chip to achieve real-time monitoring and processing of the temperature signal through programming, and then control the working state of the heating circuit 40.
[0064] Among them, the control circuit 30 may also be implemented by a main controller, such as an MCU (Microcontroller Unit, micro control unit), a DSP (Digital Signal Process, digital signal processing chip), an FPGA (Field Programmable Gate Array, programmable logic gate array chip), an SOC (System On Chip, system-level chip), etc.
[0065] In addition, the heating circuit 40 may include heating components, such as a resistance wire component, a PTC component, an infrared component, an electrothermal film, an electric heating tube, an electromagnetic heater, etc. By winding the above heating components around the inner tank, the inner tank can be heated more evenly and the heating efficiency can be higher.
[0066] In this embodiment, the heating circuit 40 is spirally wound around the outer side of the inner container and arranged at the bottom of the inner container. Then, a power supply circuit 10 is connected to an AC power supply, and the AC power supply is converted into a DC power supply with a preset voltage threshold. The driving circuit 20 is used to conduct or cut off the connection between the power supply circuit 10 and the heating circuit 40. Further, a temperature detection circuit 50 is provided to detect the temperature of the liquid in the inner container. Finally, a control circuit 30 is provided to receive the temperature signal output by the temperature detection circuit 50 and control the driving circuit 20 to conduct or cut off the connection between the power supply circuit 10 and the heating circuit 40 according to the temperature signal, so as to control the operation of the heating circuit 40. Since the heating circuit 40 is spirally wound around the outer side of the inner container and arranged at the bottom of the inner container, the heat receiving surface of the inner container can be wider and more uniform, so that the liquid in the inner container can be quickly heated, and the heat transfer speed can be greatly improved.
[0067] Optionally, referring to Figure 2 , another embodiment of the present invention provides a control circuit 30 of an electric water cup. Based on the above Figure 1 shown embodiment, the heating circuit 40 includes a DC heating film 41, wherein:
[0068] The input end of the DC heating film 41 is connected to the first output end of the driving circuit 20. The DC heating film 41 is spirally wound around the outer side of the inner container and is used to heat the inner container under the driving action of the driving circuit 20 to heat the liquid in the inner container.
[0069] In this embodiment, by setting the heating circuit 40 as a DC heating film 41 and spirally winding the DC heating film 41 around the outer side of the inner container, the heating efficiency and the heat transfer speed are greatly improved. Compared with the traditional resistance wire heating method, the DC heating film 41 has a higher heat conversion efficiency and a shorter response time. In addition, the use of the DC heating film 41 can also reduce heat loss because it is directly attached to the outer side of the inner container, making the heat transfer more directly to the liquid in the inner container.
[0070] Among them, the material of the DC heating film 41 can be a metal or alloy with good conductivity, such as copper, aluminum or stainless steel, etc. These metal materials or alloy materials have good thermal conductivity and can quickly convert electrical energy into heat energy. In practical applications, the DC heating film 41 can also be customized according to the shape and size of the inner container to ensure the close fit between the heating film and the inner container, so as to achieve the best heating effect.
[0071] In addition, the control circuit 30 can integrate an overheat protection function. When the temperature detection circuit 50 detects that the liquid temperature in the inner container exceeds the preset safety threshold, the control circuit 30 will automatically cut off the path between the drive circuit 20 and the heating circuit 40 to stop heating and prevent overheating. In addition, the control circuit 30 can also automatically adjust the heating power according to the temperature value set by the user to maintain a constant temperature of the liquid in the inner container.
[0072] Optionally, referring to Figure 3 , another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on the above Figure 2 shown embodiment, the drive circuit 20 includes a DC drive circuit 21, where:
[0073] The controlled end of the DC drive circuit 21 is connected to the first output end of the control circuit 30, the input end of the DC drive circuit 21 is connected to the output end of the power supply circuit 10, the output end of the DC drive circuit 21 is connected to the DC heating film 41, and the DC drive circuit 21 is used to conduct or cut off the path between the output end of the power supply circuit 10 and the DC heating film 41 under the control of the control circuit 30.
[0074] In this embodiment, the DC drive circuit 21 can adopt PWM (Pulse Width Modulation) technology to control the heating power of the DC heating film 41 by adjusting the pulse width, so as to achieve precise control of the heating intensity. PWM technology can effectively regulate the power output of the DC heating film 41, making the heating process smoother and more stable, and at the same time reducing energy consumption. In addition, the DC drive circuit 21 can also integrate an overcurrent protection function to prevent damage to the DC heating film 41 or other circuit components due to excessive current.
[0075] Optionally, referring to Figure 4 , yet another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on the above Figure 3 shown embodiment, the DC drive circuit 21 includes a first switching tube Q1 and a heating film connection terminal CN5, where:
[0076] A third resistor R10 is connected between the controlled end of the first switching tube Q1 and the first output end of the control circuit 30, and a fourth resistor R11 is connected between the controlled end of the first switching tube Q1 and the second conducting end; the heating film connection terminal CN5 is electrically connected to the DC heating film 41, and the second end of the heating film connection terminal CN5 is connected to the first conducting end of the first switching tube Q1.
[0077] In this embodiment, the first switching transistor Q1 can be a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) or an IGBT (Insulated Gate Bipolar Transistor). These devices have a low on-resistance and a high switching speed, which can effectively improve the heating efficiency and response speed of the electric water cup. By controlling the conduction and cutoff of the first switching transistor Q1, precise control of the DC heating film 41 can be achieved. Among them, the heating film connection terminal CN5 is used to provide a stable current path to ensure that the DC heating film 41 can obtain the required drive signal to achieve heating.
[0078] Optionally, referring to Figure 5 , another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on the above Figure 1 shown embodiment, the heating circuit 40 includes an AC heating tube 42, where:
[0079] The input end of the AC heating tube 42 is connected to the first output end of the drive circuit 20. The AC heating tube 42 is arranged at the bottom of the inner liner and is used to heat the bottom of the inner liner under the driving action of the drive circuit 20 to heat the liquid in the inner liner.
[0080] In this embodiment, the AC heating tube 42 can be made of a highly thermally conductive material such as silver, copper, or aluminum to ensure that heat can be quickly and evenly transferred to the liquid in the inner liner 200, thereby achieving rapid heating. Compared with the traditional resistance wire heating method, the AC heating tube 42 has a higher thermal conversion efficiency and a shorter response time. In addition, the AC heating tube 42 is arranged at the bottom of the inner liner, which can effectively improve the heating efficiency, and the use of the AC heating tube 42 can also reduce heat loss because it is directly attached to the bottom of the inner liner, making the heat transfer more directly to the liquid in the inner liner.
[0081] In practical applications, the AC heating tube 42 can also be customized according to the shape and size of the inner liner to ensure a tight fit between the heating tube and the inner liner, thereby achieving the best heating effect. In addition, the control circuit 30 can integrate an overheat protection function. When the temperature detection circuit 50 detects that the liquid temperature in the inner liner exceeds the preset safety threshold, the control circuit 30 will automatically cut off the path between the drive circuit 20 and the heating circuit 40 to stop heating and prevent overheating. In addition, the control circuit 30 can also automatically adjust the heating power according to the temperature value set by the user to maintain a constant temperature of the liquid in the inner liner.
[0082] Optionally, referring to Figure 6 , another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on the above Figure 5 shown embodiment, the drive circuit 20 includes an AC drive circuit 22, where:
[0083] The controlled terminal of the AC drive circuit 22 is connected to the second output terminal of the control circuit 30. The input terminal of the AC drive circuit 22 is used to connect to an AC power supply, and the output terminal of the AC drive circuit 22 is connected to the AC heating tube 42. The AC drive circuit 22 is used to conduct the path between the AC power supply and the AC heating tube 42 under the control of the control circuit 30, so that the AC heating tube 42 works.
[0084] In this embodiment, the AC drive circuit 22 can adopt TRIAC (bidirectional thyristor BT1) technology. This technology can effectively control the power output of the AC heating tube 42 and achieve precise control of the heating intensity. TRIAC technology has good load adaptability and can adapt to different types of AC heating tubes 42 to ensure the stable operation of the electric water cup under various working conditions. In addition, the AC drive circuit 22 can also integrate an overcurrent protection function to prevent damage to the AC heating tube 42 or other circuit components due to excessive current.
[0085] In this embodiment, the AC drive circuit 22 can also adopt solid-state relay (SSR) technology or optocoupler technology. By controlling the on-off state of the relay or optocoupler, the on-off of the AC power supply is controlled, thereby realizing the heating control of the AC heating tube 42. Solid-state relays have the advantages of fast response speed, no mechanical wear, long service life, etc., and can effectively improve the reliability and service life of the electric water cup.
[0086] Optionally, referring to Figure 7 In another embodiment of the present invention, a control circuit 30 of an electric water cup is provided. Based on the above Figure 6 shown embodiment, the AC drive circuit 22 includes a thyristor BT1 output optocoupler IC1 and a thyristor BT1, where:
[0087] A first resistor is connected between the first controlled terminal of the thyristor BT1 output optocoupler IC1 and the second output terminal of the control circuit 30. The second controlled terminal of the thyristor BT1 output optocoupler IC1 is connected to the output terminal of the power supply circuit 10. A second resistor is connected between the controlled terminal of the thyristor BT1 and the output terminal of the thyristor BT1 output optocoupler IC1. The first conduction end of the thyristor BT1 is used to connect to an AC power supply, and the second conduction end of the thyristor BT1 is electrically connected to the AC heating tube 42.
[0088] In this embodiment, the thyristor BT1 output optocoupler IC1 can adopt an optocoupler, which has good electrical isolation performance and can effectively isolate the control circuit 30 and the high-voltage part, improving the safety of the system. By receiving the signal from the control circuit 30 at the control terminal of the optocoupler, the conduction and cut-off of the thyristor BT1 are controlled, thereby realizing precise control of the AC heating tube 42.
[0089] In addition, the function of the second resistor is to limit the current of the optocoupler IC1 output by the thyristor BT1 and prevent the optocoupler from being damaged due to excessive current. At the same time, this second resistor can also play a certain filtering role to reduce the noise interference in the circuit.
[0090] Optionally, referring to Figure 8 , another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on any of the above Figures 1 to 7 shown embodiments, the power supply circuit 10 includes a filtering circuit 11 and a step-down circuit 12, where:
[0091] The input end of the filtering circuit 11 is connected to an AC power supply, and the filtering circuit 11 is used to filter the AC power supply; the input end of the step-down circuit 12 is connected to the output end of the filtering circuit 11, and the output end of the step-down circuit 12 outputs a DC power supply with a preset voltage threshold.
[0092] In this embodiment, the filtering circuit 11 may include a capacitor and an inductor, which are used to filter out high-frequency noise and interference in the AC power supply to ensure the purity of the power supply. The step-down circuit 12 may adopt a linear voltage regulator or a switching voltage regulator, and a suitable step-down method is selected according to actual needs. The linear voltage regulator has lower noise and better stability, and is suitable for occasions with higher requirements for power supply quality; while the switching voltage regulator has higher conversion efficiency and smaller volume, and is suitable for occasions with strict requirements for volume and power consumption.
[0093] In this embodiment, the design of the filtering circuit 11 and the step-down circuit 12 is crucial for the performance of the entire electric water cup. The filtering circuit 11 can effectively remove the interference in the AC power supply and ensure the stable operation of the subsequent circuit; while the step-down circuit 12 can convert the AC power supply into a DC power supply suitable for the use of the electric water cup to ensure that the heating element can obtain a stable driving voltage. Through the carefully designed power supply circuit 10, the heating efficiency and stability of the electric water cup can be improved, while the energy consumption is reduced, meeting the needs of modern consumers for high-efficiency and energy-saving household appliances, realizing the precise control of the heating process of the electric water cup, improving the heating efficiency and response speed, and ensuring the safety and reliability of the use of the electric water cup.
[0094] Optionally, referring to Figure 9 , another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on any of the above Figure 8 shown embodiments, the step-down circuit 12 includes a step-down chip U1, where:
[0095] The input end of the step-down chip U1 is connected to the output end of the filtering circuit 11, and the output end of the step-down chip U1 outputs a DC power supply with a preset voltage threshold. The driving circuit 20 includes a thyristor BT1 SCR1, and a resistor R9 is connected between the controlled end of the thyristor BT1 SCR1 and the control circuit 30.
[0096] In this embodiment, the buck chip U1 can adopt a high-efficiency buck converter such as LM2577. This buck chip U1 has the characteristics of high efficiency and low heat loss, and can convert the AC power supply into a stable DC power supply while maintaining low power consumption. A variety of protection functions can be integrated inside the buck chip U1, such as overcurrent protection, overheat protection, and short-circuit protection, to ensure the safe operation of the electric water cup under various abnormal conditions.
[0097] In addition, the output voltage of the buck chip U1 can be adjusted by an external resistor to adapt to heating elements of different specifications. This flexibility enables the electric water cup to adapt to different voltage requirements and increases the applicable range of the product.
[0098] In practical applications, the design of the buck circuit 12 also needs to consider the stability and response speed of the power supply. To ensure that the heating element can quickly respond to the user's temperature setting, the buck circuit 12 needs to have fast dynamic response capabilities to achieve rapid heating and temperature adjustment.
[0099] Optionally, referring to Figure 10 , another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on any of the above Figures 1 to 7 illustrated embodiments, the power supply circuit 10 includes a rectification circuit 13 and a buck circuit 12, where:
[0100] The rectification circuit 13 is used to connect to the AC power supply; the input end of the buck circuit 12 is connected to the output end of the rectification circuit 13, and the buck circuit 12 is used to step down the rectified AC voltage and output a DC power supply with a preset voltage threshold.
[0101] In this embodiment, the rectification circuit 13 can include a diode bridge rectifier for converting the AC voltage into a pulsating DC voltage. The design of the rectification circuit 13 is crucial for ensuring the stable power supply of the electric water cup, because it can convert both the positive and negative half-cycles of the AC power supply into direct current, thereby improving the power utilization rate and reducing energy loss.
[0102] In this embodiment, the output end of the rectification circuit 13 is connected to the buck circuit 12, and the buck circuit 12 can adopt devices such as a transformer T1 or a switching regulator to reduce the voltage and provide a stable DC power supply. Through the combination of the rectification circuit 13 and the buck circuit 12, it can be ensured that the electric water cup can obtain a stable power supply under various voltage conditions, thereby guaranteeing the normal operation of the heating element.
[0103] In addition, the design of the rectifier circuit 13 also needs to consider the rectification efficiency and filtering effect. To reduce the energy loss during rectification, high-efficiency rectification components can be used, and an appropriate filter circuit 11 can be added after the rectifier circuit 13 to eliminate the pulsating components in the rectified voltage and ensure the smoothness of the output voltage. This not only improves the energy utilization rate of the electric water cup but also reduces the interference to the power grid.
[0104] Optionally, referring to Figure 11 , another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on the above Figure 10 illustrated embodiment, the buck circuit 12 includes a transformer T1, an output rectifier diode D1, and a feedback circuit 121, where:
[0105] The primary winding of the transformer T1 is connected to the output terminal of the rectifier circuit 13; the positive electrode of the output rectifier diode D1 is connected to the first secondary winding of the transformer T1, and the negative electrode of the output rectifier diode D1 outputs a DC power supply with a preset voltage threshold; the input terminal of the feedback circuit 121 is connected to the output terminal of the rectifier circuit 13, and the output terminal of the feedback circuit 121 is connected to the excitation winding of the transformer T1.
[0106] In this embodiment, the feedback circuit 121 is used to monitor the output voltage in real time and feed back the monitoring result to the excitation winding of the transformer T1, thereby realizing the dynamic adjustment of the output voltage. In this way, it can be ensured that even when the power grid voltage fluctuates, the output voltage still remains within the set stable range, thus ensuring the heating performance and safety of the electric water cup. Among them, the feedback circuit 121 can include a feedback chip IC2, and the voltage is reduced through resistors R4 and R5. A diode D2 is connected to the second end of the resistor R5 and is connected to the signal input terminal of the feedback chip IC2. A resistor R2 is connected between the control terminal of the feedback chip IC2 and the first end of the excitation winding of the transformer T1.
[0107] Optionally, referring to Figure 12 , yet another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on the above Figure 1 illustrated embodiment, the input terminal of the temperature detection circuit 50 is used to connect a temperature sensor, and the temperature detection circuit 50 is used to obtain the liquid temperature signal and output it to the control circuit 30.
[0108] In this embodiment, the temperature sensor can be an NTC thermistor or a PT1000 temperature sensor, and these sensors feature high precision and fast response. The temperature detection circuit 50 is responsible for converting the analog signal collected by the temperature sensor into a digital signal so that the control circuit 30 can process it. By accurately measuring the temperature of the liquid, the temperature detection circuit 50 can monitor the heating process in real time to ensure that the liquid temperature remains within the range set by the user. Among them, the temperature detection circuit 50 includes resistor R6, resistor R7, resistor R8, and resistor R9. Resistor R6 and resistor R7 form a first voltage-dividing bias network, and resistor R8 and resistor R9 form a second voltage-dividing bias network. There is at least one capacitor connected between the common node of resistor R6 and resistor R7 and the ground, and at least one capacitor is connected between the common node of resistor R8 and resistor R9 and the ground, and it is connected to the temperature sensor through terminals CN2 and CN3.
[0109] Optionally, referring to Figure 13 , another embodiment of the present invention provides a control circuit 30 for an electric water cup. Based on the above Figure 1 shown embodiment, the power supply circuit 1051 may further include a USB input circuit, which uses the PW6606 chip to transfer the power input from the USB interface USB1 and output the power to the power supply terminal of the DC heating film 41.
[0110] In this embodiment, by providing a USB input circuit, the electric water cup can be provided with portable power supply through the USB interface when there is no AC power connection. The USB input circuit uses the PW6606 chip, which has a high-efficiency power conversion function and can convert the 5V DC power input from the USB interface into a voltage suitable for the use of the electric water cup. This design enables the electric water cup to be used not only at home or in the office but also conveniently during travel or outdoor activities, greatly improving the applicability and convenience of the electric water cup.
[0111] In this embodiment, by using the PW6606 chip, the USB input circuit can also automatically identify the maximum voltage and maximum current output by the adapter and adjust the output voltage and current of the USB port according to the identification result to ensure safe and efficient power supply to the device.
[0112] As described above is an implementation manner provided in combination with specific content, and it is not determined that the specific implementation of this application is only limited to these descriptions. Any approximation or similarity to the method and structure of this application, or any several technical deductions or replacements made under the premise of the concept of this application, should be regarded as the protection scope of this application.
Claims
1. A control circuit for an electric water cup, the electric water cup including an inner liner, characterized in that, The control circuit includes: A power supply circuit, the input end of which is used to connect to an AC power supply, and the power supply circuit is used to convert the AC power supply into a DC power supply with a preset voltage threshold; A driving circuit, the first input end of which is connected to the output end of the power supply circuit, and the second input end of the driving circuit is connected to the AC power supply; A heating circuit, which is spirally wound around the outside of the inner container, is arranged at the bottom of the inner container, is electrically connected to the output end of the driving circuit, and is used to heat the inner container; A temperature detection circuit, which is used to detect the temperature of the liquid in the inner container and output a corresponding temperature signal; A control circuit, the input end of which is connected to the output end of the temperature detection circuit, and the output end of the control circuit is connected to the controlled end of the driving circuit. The control circuit is used to control the driving circuit to drive the heating circuit to work or control the driving circuit to stop driving the heating circuit to work according to the temperature signal.
2. The control circuit of the electric water cup according to claim 1, wherein The heating circuit includes: A DC heating film, the input end of which is connected to the first output end of the driving circuit, is spirally wound around the outside of the inner container, and is used to heat the inner container under the driving action of the driving circuit to heat the liquid in the inner container.
3. The control circuit of the electric water cup according to claim 2, characterized in that, The driving circuit includes: A DC driving circuit, the controlled end of which is connected to the first output end of the control circuit, the input end of which is connected to the output end of the power supply circuit, and the output end of which is connected to the DC heating film. The DC driving circuit is used to conduct or cut off the path between the output end of the power supply circuit and the DC heating film under the control of the control circuit.
4. The control circuit of the electric water cup according to claim 3, characterized in that, The DC driving circuit includes: A first switching tube, a third resistor is connected between the controlled end and the second conducting end of the first switching tube, and a fourth resistor is connected between the controlled end and the second conducting end of the first switching tube; A heating film connection terminal, which is electrically connected to the DC heating film, and the second end of which is connected to the first conducting end of the first switching tube.
5. The control circuit of the electric water cup according to claim 1, characterized in that, The heating circuit includes: An AC heating tube, the input end of which is connected to the first output end of the driving circuit, is arranged at the bottom of the inner container, and is used to heat the bottom of the inner container under the driving action of the driving circuit to heat the liquid in the inner container.
6. The control circuit of the electric hot water cup according to claim 5, characterized in that, The driving circuit includes: An AC driving circuit, the controlled end of which is connected to the second output end of the control circuit, the input end of which is used to connect to the AC power supply, and the output end of which is connected to the AC heating tube. The AC driving circuit is used to conduct the path between the AC power supply and the AC heating tube under the control of the control circuit to enable the AC heating tube to work.
7. The control circuit of the electric water cup according to claim 6, characterized in that, The AC driving circuit includes: A thyristor output optocoupler, with a first resistor connected between the first controlled terminal of the thyristor output optocoupler and the second output terminal of the control circuit, and the second controlled terminal of the thyristor output optocoupler is connected to the output terminal of the power supply circuit; A thyristor, with a second resistor connected between the controlled terminal of the thyristor and the output terminal of the thyristor output optocoupler, the first conduction terminal of the thyristor is used to connect to the AC power supply, and the second conduction terminal of the thyristor is electrically connected to the AC heating tube.
8. The control circuit of the electric water cup according to any one of claims 1 to 7, characterized in that The power supply circuit includes: A filtering circuit, the input terminal of the filtering circuit is connected to the AC power supply, and the filtering circuit is used to filter the AC power supply; A bucking circuit, the input terminal of the bucking circuit is connected to the output terminal of the filtering circuit, and the output terminal of the bucking circuit outputs a DC power supply with a preset voltage threshold; Wherein, the bucking circuit includes: A bucking chip, the input terminal of the bucking chip is connected to the output terminal of the filtering circuit, and the output terminal of the bucking chip outputs a DC power supply with a preset voltage threshold.
9. The control circuit of the electric water cup according to any one of claims 1 to 7, characterized in that, The power supply circuit includes: A rectifying circuit, the rectifying circuit is used to connect to the AC power supply; A bucking circuit, the input terminal of the bucking circuit is connected to the output terminal of the rectifying circuit, and the bucking circuit is used to step down the rectified AC voltage and output a DC power supply with a preset voltage threshold.
10. The control circuit of the electric water cup according to claim 9, characterized in that, The bucking circuit includes: A transformer, the primary winding of the transformer is connected to the output terminal of the rectifying circuit; An output rectifying diode, the positive electrode of the output rectifying diode is connected to the first secondary winding of the transformer, and the negative electrode of the output rectifying diode outputs a DC power supply with a preset voltage threshold; A feedback circuit, the input terminal of the feedback circuit is connected to the output terminal of the rectifying circuit, and the output terminal of the feedback circuit is connected to the exciting winding of the transformer.