Heating assembly with temperature field area capable of being coded and adjusted, control system and method

Abstract

The invention discloses a heating assembly with a temperature field area capable of being coded and adjusted, a control system and a method, and belongs to the technical field of heating. The heating assembly comprises an assembly shell, a plurality of heating coils arranged in parallel along a preset direction, an isolation gasket arranged between any two heating coils, and a switch array. A heating area is defined by the multiple heating coils together, and the isolation gaskets are used for achieving electrical isolation between the heating coils. The switch array comprises a plurality of switch units, and each switch unit is connected with one heating coil in a one-to-one correspondence mode and used for independently controlling on-off of the corresponding heating coil. According to the control system and method, independent control signals of multiple channels are output to the switch array through the controller, and independent and accurate regulation and control of the heating power of each heating coil are achieved. According to the scheme, through multi-channel zone control, the technical problems of uneven temperature field and low regulation and control precision caused by a traditional single heating wire structure are solved.

Description

Technical Field

[0001] This invention relates to the field of heating technology, and in particular to a heating component, control system, and method with coded adjustable temperature field. Background Technology

[0002] Currently, in the field of circumferential heated smoking devices, traditional heating component designs have revealed numerous insurmountable problems in practical applications. Traditional circumferential heating components often employ a single heating wire structure, which suffers from significant deficiencies in temperature field control during actual use. Due to the single heating wire, heat transfer exhibits a decreasing trend from the wire outwards, making it difficult to achieve uniform heating of all circumferential areas within the smoking device. Taking a common cylindrical heating cavity as an example, the side closer to the heating wire heats up rapidly, while the side farther away heats up slowly, resulting in significant differences in heating intensity along the entire circumference. This prevents the pyrolysis reaction of the internal materials from proceeding under uniform and suitable conditions, leading to inconsistent smoke quality and severely impacting the user experience.

[0003] Furthermore, from the perspective of temperature control precision, circumferential heating components with a single heating wire structure also have significant limitations. Due to the lack of independent temperature control capabilities for different zones, existing components cannot meet the need for temperature adjustments in specific areas based on user preferences or material characteristics. For example, different types of materials require different optimal heating temperatures and heating curves; a single heating wire can only provide a single heating mode and cannot offer flexible temperature adjustment, which greatly limits the ability of circumferential heating devices to meet personalized user needs.

[0004] Therefore, how to provide a heating scheme that enables precise and coded adjustment of the temperature field region to improve heating uniformity and meet personalized needs has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The main objective of this invention is to provide a heating component, control system, and method with coded adjustable temperature field, aiming to solve the technical problems of uneven heating and low temperature field control accuracy in existing single heating wire heating components.

[0006] According to a first aspect of the present invention, a heating assembly with coded adjustable temperature field region is provided, comprising:

[0007] A component housing;

[0008] Multiple heating coils are arranged side by side in a predetermined direction within the component housing, and together form a heating area for accommodating the object to be heated;

[0009] At least one insulating pad is disposed between two adjacent heating coils to achieve electrical isolation between the heating coils;

[0010] A switch array comprising multiple switch units, wherein the output terminal of each switch unit is connected to a heating coil in a one-to-one correspondence, and the control terminal of each switch unit is used to receive external control signals to independently control the on / off state of the corresponding heating coil.

[0011] Preferably, it further includes:

[0012] A top cover and a bottom cover are respectively connected to both ends of the component housing for axial positioning and sealing of the plurality of heating coils.

[0013] Preferably, it further includes:

[0014] An isolation sleeve is disposed on the inner wall of the heating area surrounded by the plurality of heating coils, for electrically isolating the plurality of heating coils from the object to be heated.

[0015] Preferably, the switching unit is a MOSFET.

[0016] A second aspect of the present invention provides a control system with coded adjustable temperature field region, comprising:

[0017] The heating assembly described in any one of the first aspects;

[0018] A controller, wherein multiple output terminals of the controller are connected one-to-one with the control terminals of multiple switching units of the switching array in the heating assembly;

[0019] The controller generates and outputs control signals independently to each of the switching units to control the heating power of each heating coil, thereby enabling coded adjustment of the temperature field of the heating area.

[0020] Preferably, the controller is a microcontroller (MCU), and the control signal is a pulse width modulation (PWM) signal.

[0021] Preferably, a signal isolator is also provided between the controller and the switch array for isolating and transmitting the control signal.

[0022] A third aspect of the present invention provides a heating method with coded adjustable temperature field region, employing the control system described in the second aspect, the method comprising the following steps:

[0023] For each of the plurality of heating coils, a target temperature curve is pre-set and stored, the target temperature curve defining the target temperature corresponding to different times in the heating process;

[0024] After the heating process is started, the controller independently executes the following control loop for each heating coil:

[0025] Real-time monitoring of the actual temperature of the heating coil;

[0026] Based on the current time, obtain the current target temperature from the target temperature curve;

[0027] The actual temperature is compared with the target temperature, and the control signal output to the corresponding switching unit is adjusted according to the comparison result to regulate the heating power of the heating coil so that the actual temperature approaches the target temperature.

[0028] Preferably, the step of real-time monitoring of the actual temperature of the current heating coil includes:

[0029] The real-time resistance of the heating coil is measured in real time.

[0030] The actual temperature is calculated from the real-time resistance based on the preset resistance-temperature relationship model.

[0031] Preferably, before starting the heating process, it further includes:

[0032] The controller loads preset parameters related to each of the heating coils from the storage unit. The preset parameters include: preset total heating time, reference temperature, coil resistance at the reference temperature, coil resistance temperature coefficient, and target temperature curve.

[0033] According to the technical content disclosed in this invention, the following beneficial effects are achieved:

[0034] Compared with existing technologies, the technical solution provided by this invention has the following beneficial effects: By decomposing a single heating element into multiple parallel and electrically isolated independent heating coils, and equipping each heating coil with an independent switching unit, a multi-channel heating physical basis is formed. This structure allows the heat source to be distributed more widely and uniformly in space, fundamentally improving the problem of large-scale temperature gradients caused by a single heat source, and making the object to be heated in the heating area more evenly heated. More importantly, each heating coil acts as an independent control channel, allowing the control system to adjust its power individually. This gives the heating component the ability to finely and codedly adjust the internal temperature field. The controller can apply different heating power and timing to the heating coils at different locations according to a preset program or real-time feedback, thereby constructing a specific, dynamically changing temperature distribution in the heating area. This not only achieves highly uniform heating but also meets the complex and personalized heating needs of different materials and user preferences, greatly improving product performance, flexibility, and user experience.

[0035] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0037] Figure 1 This is a schematic diagram of the installation structure of the heating component in an embodiment of the present invention;

[0038] Figure 2 This is an exploded view of the heating component in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the control system in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. Heating assembly; 1. Top cover; 2. Bottom cover; 3. Multi-layer heating coil; 4. Multi-layer insulating pad; 5. MOS switch array; 6. Switch control lead; 7. Switch fixing and heat dissipation mechanism; 8. Positive lead; 9. Negative lead; 10. Assembly housing; 11. Isolation sleeve;

[0042] 200. Control system; 21. Heating controller; 22. Signal isolator; 23. MOSFET. Detailed Implementation

[0043] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0044] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0046] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0048] Example 1:

[0049] Please see Figure 1 and Figure 2 According to a first aspect of the present invention, a heating assembly 100 with coded adjustable temperature field region is provided. The structural design of the heating assembly 100 is intended to achieve fine-grained, multi-channel control of the heating region.

[0050] Specifically, the heating assembly 100 includes an assembly housing 10, which provides housing space and structural support for other components. Inside the assembly housing 10, multiple heating coils 3 are disposed. In this embodiment, these heating coils 3 are stacked in multiple layers or arranged side-by-side along the axial direction, collectively forming a hollow heating area for placing the object to be heated (such as tobacco). To ensure that each heating coil 3 can operate as an independent electrical channel, an insulating gasket 4 is disposed between two adjacent heating coils 3. The insulating gasket 4 is made of an insulating, high-temperature resistant material, serving both electrical isolation and physical support.

[0051] To enable independent control of multiple heating coils 3, the heating assembly 100 also integrates a switch array. In this embodiment, the switch array is specifically a MOS switch array 5, which consists of eight groups of MOS transistors. Each group of MOS transistors acts as a switching unit, with its output terminal (e.g., drain) connected to one end of a heating coil 3. Each switching unit of the MOS switch array 5 has an independent control terminal, which is led out through a switch control lead 6 to receive control signals from an external controller (such as an MCU). By sending different control signals to different switch control leads 6, the conduction and cutoff of each MOS transistor can be controlled independently, thereby controlling the current flow and heating power of the connected heating coil 3.

[0052] To ensure the integrity and stable operation of the circuit, the heating assembly 100 also includes a positive lead 8 and a negative lead 9. The positive lead 8 is connected to the source of the MOSFET, providing power input. The negative lead 9 is connected to the drain of the MOSFET (after passing through the heating coil 3) to the ground wire, forming a complete current loop. Meanwhile, to ensure that the heat generated by the MOSFET switch array 5 during operation can be dissipated in a timely manner, a switch fixing and heat dissipation mechanism 7 is also provided to fix the switch array and assist in heat dissipation.

[0053] In addition, to protect the object to be heated from direct contact with the heating coil 3 and to achieve electrical isolation, an isolation sleeve 11 is provided on the inner wall of the heating area. The two ends of the heating assembly 100 are sealed by a top cover 1 and a bottom cover 2, respectively. These two covers also provide good axial positioning for the multi-layer heating coil 3 and the isolation gasket 4, ensuring the stability of the overall structure.

[0054] Example 2:

[0055] Please see Figure 3 The second aspect of the present invention provides a control system with coded adjustable temperature field region; specifically, it is a control system 200 with coded adjustable temperature field region based on the heating component 100 described in the first aspect.

[0056] The core of the control system 200 is a heating controller 21, such as an STM32 microcontroller (MCU). The heating controller 21 has multiple independent output channels and can generate and output multiple pulse width modulation (PWM) signals. Each PWM signal is connected to the gate of a MOSFET 23 (which can be an SOT23) in the MOSFET switch array 5 via a switch control lead 6.

[0057] In this embodiment, the output signal of the heating controller 21 first passes through a signal isolator 22 (e.g., model ADP1031). The function of the signal isolator 22 is to electrically isolate the input control signal before outputting it. This can effectively prevent high voltage or noise in the heating main circuit from interfering with the precision controller circuit, thereby improving the stability and safety of the system. The isolated control signal is then sent to the gate of the corresponding MOSFET 23.

[0058] During operation, the heating controller 21 generates a PWM signal independently for each heating channel (i.e., each heating coil 3) according to a preset heating algorithm. By adjusting the duty cycle of the PWM signal, the conduction time ratio of the corresponding MOSFET 23 can be precisely controlled, thereby accurately adjusting the average current flowing through the corresponding heating coil 3 and achieving independent control of its heating power. Since the system contains 8 independent control channels, the heating controller 21 can simultaneously apply different or the same heating power to the 8 heating coils 3, thereby achieving arbitrary coded combination of temperature field distribution within the heating area.

[0059] Example 3:

[0060] A third aspect of the present invention provides a heating method with coded adjustable temperature field region, which is implemented by operating on the control system 200 described in Embodiment 2. The process of the method is as follows:

[0061] 1. Set the heating time for each heating channel - set the temperature sequence

[0062] Before heating begins, an independent heating time-temperature sequence is set for each of the eight heating channels (corresponding to eight heating coils 3) in the system, denoted as . Parameters. This sequence defines the parameters for the total heating time t. total,i Within this sequence, the target temperature to be reached at each time point t. These sequence parameters can be pre-programmed or downloaded to the storage unit of the heating controller 21 via a communication interface.

[0063] II. Loading Preset Heating Parameters

[0064] When starting the heating task, the heating controller 21 first loads the basic parameters of the eight heating channels from its storage unit. These parameters include: the preset total heating time t for each channel. total,i (seconds), reference temperature T 0,i (e.g., room temperature 25°C), coil resistance R at reference temperature 0,i (Ω), temperature coefficient of coil resistance α i (1 / ℃), initial PWM percentage D 0,i (%), and the heating time-set temperature sequence mentioned above. Parameters such as these.

[0065] III. Heating Start

[0066] The heating controller 21 parses the loaded preset parameters and obtains the total heating time t for each channel. total,i (seconds) and target temperature sequence such as reference temperature T 0,i (°C) (25°C, room temperature), coil resistance R at reference temperature 0,i (Ω), temperature coefficient of coil resistance α i (1 / ℃), initial PWM percentage D 0,i (%), Heating time-set temperature sequence for each channel Parameters such as these.

[0067] Subsequently, the controller controls eight control pins (output channels) to output their respective initial PWM duty cycles D. 0,i The MOS switch array 5 is turned on, causing all heating coils 3 to start heating at a base power.

[0068] IV. Heating Coil Status Monitoring and Closed-Loop Temperature Control

[0069] This is the core control component in the heating process, a closed-loop feedback control process that operates independently for each channel.

[0070] 1. Real-time temperature measurement of heating coils: During the heating process, the controller periodically and independently monitors the real-time status of each heating coil 3. Since the resistance of a metal coil is positively correlated with its temperature, this method inversely calculates the temperature by measuring the resistance. Specifically, the controller uses a built-in analog-to-digital converter (ADC) and external sampling circuits (such as voltage divider circuits) to collect the voltage and current flowing through each heating coil in real time, thereby calculating its real-time resistance R. t,i .

[0071] 2. Temperature Inversion Calculation: Based on the parameters applied in step two, the resistance-temperature relationship formula R is used. t,i =R 0,i *[1+α i *(T t,i -T 0,i The actual temperature T of each channel heating coil at the current time t is calculated in reverse. t,i .

[0072] 3. Target Temperature Acquisition and Error Calculation: The controller acquires the target temperature from the corresponding channel's temperature sequence TempSerial based on the current running time t. i The query retrieves the target temperature Temp at the current moment. t,i Then, the error E between the actual temperature and the target temperature is calculated. i =Temp t,i -Tt,i .

[0073] 4. Dynamic adjustment of PWM duty cycle: The controller internally runs a PID (proportional-integral-derivative) or simplified PI control algorithm. Based on the calculated error E... i The algorithm will generate an adjustment amount for the PWM duty cycle D of the current channel. t,i Adjustments will be made. If the actual temperature is lower than the target temperature (E... i If the value is greater than 0, then increase the PWM duty cycle to increase the heating power; conversely, decrease the PWM duty cycle.

[0074] 5. Cyclic Execution: Steps 1 to 4 above constitute one control cycle. The controller executes this process cyclically for all 8 channels at an extremely high frequency (e.g., hundreds of times per second) until the preset total heating time t is reached. total,i .

[0075] In this way, the temperature of each heating coil can be precisely controlled, ensuring it strictly follows its own preset temperature curve. This enables the entire heating assembly to achieve fine-grained, coded adjustment of the temperature field in both spatial and temporal dimensions.

[0076] The control system and method of this invention output multi-channel independent control signals to a switch array through a controller, enabling independent and precise control of the heating power of each heating coil. This solution, through multi-channel zone control, solves the technical problems of uneven temperature field and low control precision caused by traditional single-heating-wire structures. It achieves refined and coded adjustment of the temperature field in the heating area, significantly improving heating uniformity and adaptability to different heating objects and personalized needs, thereby optimizing product performance and user experience.

[0077] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A heating component with an adjustable temperature field region, characterized in that, include: A component housing; Multiple heating coils are arranged side by side in a predetermined direction within the component housing, and together form a heating area for accommodating the object to be heated; At least one insulating pad is disposed between two adjacent heating coils to achieve electrical isolation between the heating coils; A switch array comprising multiple switch units, wherein the output terminal of each switch unit is connected to a heating coil in a one-to-one correspondence, and the control terminal of each switch unit is used to receive external control signals to independently control the on / off state of the corresponding heating coil.

2. The heating assembly according to claim 1, characterized in that, Also includes: A top cover and a bottom cover are respectively connected to both ends of the component housing for axial positioning and sealing of the plurality of heating coils.

3. The heating assembly according to claim 1, characterized in that, Also includes: An isolation sleeve is disposed on the inner wall of the heating area surrounded by the plurality of heating coils, for electrically isolating the plurality of heating coils from the object to be heated.

4. The heating assembly according to claim 1, characterized in that, The switching unit is a MOSFET.

5. A control system with coded adjustable temperature field region, characterized in that, include: The heating assembly according to any one of claims 1 to 4; A controller, wherein multiple output terminals of the controller are connected one-to-one with the control terminals of multiple switching units of the switching array in the heating assembly; The controller generates and outputs control signals independently to each of the switching units to control the heating power of each heating coil, thereby enabling coded adjustment of the temperature field of the heating area.

6. The control system according to claim 5, characterized in that, The controller is a microcontroller, and the control signal is a pulse width modulation signal.

7. The control system according to claim 5, characterized in that, A signal isolator is also provided between the controller and the switch array for isolating the transmission of the control signals.

8. A heating method with coded adjustable temperature field region, characterized in that, The method using the control system of claim 5 includes the following steps: For each of the plurality of heating coils, a target temperature curve is pre-set and stored, the target temperature curve defining the target temperature corresponding to different times in the heating process; After the heating process is started, the controller independently executes the following control loop for each heating coil: Real-time monitoring of the actual temperature of the heating coil; Based on the current time, obtain the current target temperature from the target temperature curve; The actual temperature is compared with the target temperature, and the control signal output to the corresponding switching unit is adjusted according to the comparison result to regulate the heating power of the heating coil so that the actual temperature approaches the target temperature.

9. The method according to claim 8, characterized in that, The step of real-time monitoring of the actual temperature of the current heating coil includes: The real-time resistance of the heating coil is measured in real time. The actual temperature is calculated from the real-time resistance based on the preset resistance-temperature relationship model.

10. The method according to claim 8, characterized in that, Before starting the heating process, it also includes: The controller loads preset parameters related to each of the heating coils from the storage unit. The preset parameters include: preset total heating time, reference temperature, coil resistance at the reference temperature, coil resistance temperature coefficient, and target temperature curve.

Images