Variable power heater control device

Abstract

The utility model belongs to the technical field of movable air conditioners, and relates to a variable-power heater control device which comprises a single chip microcomputer, and a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplification circuit, a fan driving circuit and a temperature control alarm circuit which are all connected with the single chip microcomputer, the signal isolation circuit is used for isolating signals among the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface circuit, the voltage relay control amplification circuit, the voltage serial port transmit-receive circuit and the temperature over-temperature alarm circuit to prevent electrical interference, and the interface circuit is used for connecting the heater control device with external equipment. The relay control amplifying circuit is used for amplifying the control signal so as to drive the relay to perform on-off operation and control starting and stopping of the heater and the rotating speed of the fan. The heater can be efficiently, safely and intelligently controlled, and stable and reliable heat support is provided for various application scenes.

Description

Technical Field

[0001] This utility model relates to the field of portable air conditioning technology, and more specifically, to a variable power heater control device. Background Technology

[0002] With technological advancements, many heaters on the market now feature protective circuits and housings. To meet diverse user needs, a wide variety of products have emerged. However, these products still cannot satisfy people's ever-increasing demands. Consequently, products continue to improve, and people constantly create new products in response.

[0003] In the existing technology, the control board circuit is not comprehensive or perfect enough. Summary of the Invention

[0004] To address the aforementioned deficiencies in the prior art, this utility model provides a variable power heater control device, comprising: a microcontroller, and connected to the microcontroller are a voltage power supply circuit, a signal isolation circuit, an interface line, a relay control amplification circuit, a fan drive circuit, a serial port transceiver circuit, and a temperature over-temperature alarm circuit. The voltage power supply circuit supplies power to the heater control device, and the signal isolation circuit isolates the signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage interface line, the voltage relay control amplification circuit, the voltage fan drive circuit, the voltage serial port transceiver circuit, and the voltage temperature over-temperature alarm circuit, preventing... To prevent electrical interference, the interface circuit is used to connect the heater control device to external devices. The relay control amplification circuit amplifies the control signal to drive the relay for switching operations, controlling the heater's start-up, shutdown, and speed. The fan drive circuit adjusts the fan's operating state according to the control signal to control the heater. The serial port transceiver circuit transmits and receives data via a serial port, enabling the device to communicate with a host computer for real-time data transmission and remote control. The over-temperature alarm circuit triggers an alarm upon detecting an abnormally high temperature, alerting the user to handle the situation promptly and preventing the fault from escalating. Preferably, the microcontroller is an N32G030C8L7.

[0005] Preferably, the voltage power supply circuit includes a mains power to DC 24V power supply circuit and a 24V to 3.3V power supply circuit.

[0006] Preferably, the signal isolation circuit includes a dual-channel high-speed opto-isolator U3 whose positive terminal of the LED is connected to one end of resistor R5, a dual-channel high-speed opto-isolator U4 whose positive terminal of the LED is connected to one end of resistor R14, and a dual-channel high-speed opto-isolator U6 whose positive terminal of the LED is connected to one end of resistor R19.

[0007] Preferably, the relay control amplifier circuit includes: one end of the relay K1A is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is connected to one end of the resistor R10 and grounded, and the base of the transistor Q2 is connected to the other end of the resistor R10 and one end of the resistor R4.

[0008] Preferably, the over-temperature alarm circuit includes: a temperature sensing chip U5 and peripheral circuits R15, R16, R17, and C6.

[0009] Preferably, the device is further provided with an air outlet, which is located around the heating tube.

[0010] The heater control device of this utility model has the following beneficial effects: By setting up a microcontroller, a voltage power supply circuit, a signal isolation circuit, an interface line, a relay control amplification circuit, a fan drive circuit, and a temperature over-temperature alarm circuit are all connected to the microcontroller. The voltage power supply circuit is used to supply power to the heater control device. The signal isolation circuit is used to isolate the signals between the voltage power supply circuit, voltage signal isolation circuit, voltage interface line, voltage relay control amplification circuit, voltage fan drive circuit, and voltage temperature over-temperature alarm circuit to prevent electrical interference. The interface line is used for the heater control device to connect to external devices. The relay control amplification circuit is used to amplify the control signal, thereby driving the relay to perform switching operations and control the start, stop, and speed of the heater. The fan drive circuit is used to adjust the operating state of the fan according to the control signal to realize the control of the heater. The temperature over-temperature alarm circuit is used to trigger an alarm once an abnormally high temperature is detected, reminding the user to deal with it in time and prevent the fault from escalating. It can efficiently, safely, and intelligently control the heater, providing stable and reliable wind power support for various application scenarios. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. The utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0012] Figure 1 This is a schematic diagram of the circuit configuration of the heater control device of this utility model;

[0013] Figure 2 This is the voltage power supply circuit diagram of the heater control device of this utility model;

[0014] Figure 3(a) is a first signal isolation circuit diagram in the heater control device of this utility model;

[0015] Figure 3(b) is a second signal isolation circuit diagram in the heater control device of this utility model;

[0016] Figure 3(c) is a diagram of the third signal isolation circuit in the heater control device of this utility model; Figure 4 This is a circuit diagram of the relay control amplifier in the heater control device of this utility model;

[0017] Figure 5 This is a circuit diagram of the fan drive in the heater control device of this utility model;

[0018] Figure 6 This is the circuit diagram of the on-board temperature sensor in the heater control device of this utility model;

[0019] Figure 7 This is a schematic diagram of the microcontroller in the heater control device of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] Figure 1 This is a schematic diagram of the circuit configuration of the heater control device of this utility model; Figure 2Figure 1 is the voltage power supply circuit diagram of the heater control device of this utility model; Figure 2 is the signal isolation circuit diagram of the heater control device of this utility model. Figure 4 This is a circuit diagram of the relay control amplifier in the heater control device of this utility model; Figure 5 This is a circuit diagram of the fan drive in the heater control device of this utility model; Figure 6 This is the circuit diagram of the on-board temperature sensor in the heater control device of this utility model; Figure 7 This is a schematic diagram of the microcontroller in the heater control device of this utility model.

[0024] Please see Figures 1-7 The heater control device provided in the first embodiment of this utility model includes at least a microcontroller, a voltage power supply circuit, a signal isolation circuit, an interface line, a relay control amplification circuit, a fan drive circuit, and a temperature over-temperature alarm circuit, all connected to the microcontroller. The voltage power supply circuit supplies power to the heater control device. The signal isolation circuit isolates the signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage relay control amplification circuit, the voltage fan drive circuit, the voltage serial port transceiver circuit, and the voltage temperature over-temperature alarm circuit to prevent electrical interference. The interface line connects the heater control device to external devices. The relay control amplification circuit amplifies the control signal to drive the relay to perform switching operations, controlling the start, stop, and speed of the heater. The fan drive circuit adjusts the fan's operating state according to the control signal to control the heater, enabling real-time data transmission and remote control. The temperature over-temperature alarm circuit triggers an alarm upon detecting an abnormally high temperature, reminding the user to handle the situation promptly and prevent the fault from escalating. In specific implementations, the microcontroller can be, but is not limited to, an N32G030C8L7. In this embodiment, the microcontroller is selected as an N32G030C8L7.

[0025] The voltage supply circuit includes a mains-to-DC 24V power supply circuit, a 24V-to-3.3V power supply circuit, and a 24V energy storage power supply circuit. In practice, the voltage supply circuit transforms the mains power to provide power to the microcontroller, signal isolation circuit, interface lines, relay control amplifier circuit, fan drive circuit, and over-temperature alarm circuit. The voltage supply circuit provides stable and reliable power, ensuring the continuous and stable operation of the entire system.

[0026] The signal isolation circuit includes a dual-channel high-speed opto-isolator U3, where the positive terminal of the LED is connected to one end of resistor R5; a dual-channel high-speed opto-isolator U4, where the positive terminal of the LED is connected to one end of resistor R21; and a dual-channel high-speed opto-isolator U6, where the positive terminal of the LED is connected to one end of resistor R19. In a specific implementation, the dual-channel high-speed opto-isolator U4 can be an EL357N. By isolating signals between different circuits, the signal isolation circuit effectively prevents electrical interference, ensuring signal purity and accuracy.

[0027] An opto-isolator is a device used to isolate electrical signals. It provides electrical isolation between input and output signals to protect controlled equipment and improve system stability and reliability. Opto-isolators are characterized by high-speed response, high isolation voltage, low power consumption, and small size.

[0028] The EL357N is a dual-channel high-speed opto-isolator composed of a photodiode and a phototransistor. A photodiode converts light energy into electrical energy, while a phototransistor converts light energy into current. The EL357N works by having the photodiode emit a light signal, which is then received by the phototransistor and converted into a current signal, thus isolating the input and output signals.

[0029] The EL357N operates as follows: Input signal isolation: When an input signal is applied to the input terminal of the EL357N, the input photodiode is excited, emitting a light signal of a certain intensity. Light signal transmission: The light signal propagates within the optocoupler through the optical coupling medium, which is typically a light-transparent organic material. Light signal detection: When the light signal reaches the output phototransistor, the phototransistor is excited, generating a corresponding current signal. Output signal isolation: The output signal is transmitted to the output terminal through the current signal of the phototransistor, achieving electrical isolation between the input and output signals.

[0030] The relay-controlled amplifier circuit includes: one end of relay K1A is connected to the collector of transistor Q2; the emitter of transistor Q2 is connected to one end of resistor R19 and grounded; and the base of transistor Q2 is connected to the other end of resistor R19 and one end of resistor R4. The relay's function is to control the circuit's on / off state. Relays can quickly and accurately connect or disconnect circuits according to changes in external signals, achieving automated circuit control. This allows the circuit system to respond to changes in the external environment and improves operating efficiency. The amplifier's function is to amplify signals. In a circuit system, signals may weaken due to transmission distance, equipment losses, etc. In this case, the amplifier can amplify the weak signal, allowing it to be transmitted smoothly in the circuit. This is crucial for maintaining signal stability and accuracy. Resistors in the circuit play a role in limiting current, dividing voltage, and stabilizing the circuit. Resistors can precisely control the current magnitude, preventing damage to the circuit due to excessive current. Simultaneously, resistors can also perform voltage division, distributing voltage to each circuit in a certain proportion, ensuring that each circuit receives a stable operating voltage. The relay control amplifier circuit is responsible for amplifying the weak control signal, thereby driving the relay to perform switching operations and control the start-up, shutdown, and rotation speed of the heater.

[0031] The over-temperature alarm circuit includes: one end of relay K3A is connected to the collector of transistor Q3; the emitter of transistor Q3 is connected to one end of resistor R11 and grounded; and the base of transistor Q3 is connected to one end of resistor R6 and the other end of resistor R11. The relay is activated by the voltage and current input of the intercom unit. When the temperature is abnormal, the CPU sends a high level to PC13, activating the relay and thus achieving the alarm purpose.

[0032] In practical implementation, the heater control device of this utility model also includes an air outlet located around the heating tube. The heater control device also incorporates a temperature sensor. A temperature sensing chip is used to detect the ambient temperature. When the heater is running, the fan automatically turns on; when the heater turns off, the fan determines whether to delay shutting down based on the running time; when the heater is on, the sensor can also detect the ambient temperature to control the fan's rotation speed; the higher the temperature, the faster the fan rotates, and vice versa.

[0033] This utility model's heater control device achieves heater control by adding a fan, heating element, and a device with an air outlet that can be installed inside the heater to the circuit control board. Pressing the manual button starts the heater, and the fan automatically turns on.

[0034] The beneficial effects of this utility model, through the design of the above embodiments, are as follows: By setting up a microcontroller, a voltage power supply circuit, a signal isolation circuit, an interface line, a relay control amplification circuit, a fan drive circuit, and a temperature over-temperature alarm circuit are all connected to the microcontroller. The voltage power supply circuit is used to power the heater control device; the signal isolation circuit is used to isolate the signals between the voltage power supply circuit, the voltage signal isolation circuit, the voltage relay control amplification circuit, the voltage fan drive circuit, and the voltage temperature over-temperature alarm circuit to prevent electrical interference; the interface line is used for the heater control device to connect to external devices; the relay control amplification circuit is used to amplify the control signal, thereby driving the relay to perform switching operations and control the start and stop of the heater; the fan drive circuit is used to adjust the operating state of the fan according to the control signal to realize the control of the fan; the temperature over-temperature alarm circuit is used to trigger an alarm once an abnormally high temperature is detected, reminding the user to deal with it in time and prevent the fault from escalating; it can efficiently, safely, and intelligently control the heater, providing stable and reliable wind power support for various application scenarios.

[0035] This utility model has been described based on specific embodiments, but those skilled in the art will understand that various changes and equivalent substitutions can be made without departing from the scope of this utility model. Furthermore, to adapt to specific applications of this utility model, numerous modifications can be made without departing from its protection scope. Therefore, this utility model is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the protection scope of the claims.

Claims

1. A variable power heater control device, characterized by, The device comprises a single-chip microcomputer, a voltage power supply circuit, a signal isolation circuit, an interface circuit, a relay control amplification circuit, a fan driving circuit, a serial port transceiver circuit, and a temperature over-temperature alarm circuit, all of which are connected to the single-chip microcomputer. The single-chip microcomputer is N32G030C8L7.

2. The heater control device of claim 1, wherein The voltage power supply circuit comprises a mains-to-DC 24V power supply circuit, a 24V-to-3.3V power supply circuit, and a 24V energy storage power supply circuit.

3. The heater control device of claim 1, wherein, The signal isolation circuit comprises a light-emitting diode anode of a dual-channel high-speed optoelectronic isolator U3 connected to one end of a resistor R5, a light-emitting diode anode of a dual-channel high-speed optoelectronic isolator U4 connected to one end of a resistor R14, and a light-emitting diode anode of a dual-channel high-speed optoelectronic isolator U6 connected to one end of a resistor R19.

4. The heater control device of claim 1, wherein The relay control amplification circuit comprises one end of a relay K1A connected to a collector of a triode Q2, an emitter of the triode Q2 connected to one end of a resistor R9 and grounded, and a base of the triode Q2 connected to the other end of the resistor R9 and one end of a resistor R3.

5. The heater control device of claim 1, wherein The temperature sensing circuit comprises a temperature-sensing chip U1 and a peripheral circuit.

6. The heater control device of claim 1, wherein, The temperature over-temperature alarm circuit comprises sensing signals collected by a temperature-sensing chip U5 connected to the U1.

7. The heater control device according to any one of claims 1 to 6, wherein The device is also provided with an air outlet, which is arranged on one side of the heating pipe.

8. The heater control device of claim 7, wherein, ​

Images