Temperature control system for a hot surface ignition device and method for controlling the temperature of a hot surface ignition device

Abstract

A temperature control system for a hot surface ignition device is disclosed, which includes: a power supply module for supplying power to the temperature control system; a memory module for pre-storing a set target temperature; a collection module for collecting and acquiring the current temperature of the hot surface ignition device; a determination module for determining whether the current temperature of the hot surface ignition device matches the target temperature; a calculation module for, if the current temperature does not match the target temperature, performing calculations using the current temperature to obtain a temperature difference between the target temperature and the current temperature and obtaining a voltage control amount based on the temperature difference; and a control module for automatically controlling the output voltage of the power supply module based on the obtained voltage control amount until it is determined that the current temperature of the hot surface ignition device matches the target temperature. According to the present invention, by supplying a suitable voltage to the hot surface ignition device, the hot surface ignition device can be reliably operated at the set target temperature, thereby precisely controlling the operating temperature of the hot surface ignition device and extending the service life of the hot surface ignition device.

Description

[Technical Field]

[0001] The present invention relates to a hot surface ignition device, and more particularly to a temperature control system for a hot surface ignition device and a method for controlling the temperature of a hot surface ignition device. [Background technology]

[0002] Hot surface ignition devices as automatic ignition devices use hot surface ignition technology. With this technology, flammable gas or flammable fuel oil is introduced into the combustion zone after the hot surface ignition device reaches a high temperature, completely avoiding potential problems caused by electric sparks. During operation, a voltage is applied to the hot surface ignition device from a power source, causing the heating element of the hot surface ignition device to ignite. However, because conventional hot surface ignition devices use a constant voltage power supply method, the temperature of the hot surface ignition device cannot be adjusted after voltage is applied due to the influence of the material and physical structure of the heating element itself. Meanwhile, in most applications of hot surface ignition devices, conventional hot surface ignition devices only have an ignition function. That is, conventional hot surface ignition devices are activated only during the ignition process, and their use time is very short. Therefore, the service life of hot surface ignition devices is usually long. However, in some specific application fields, such as the automotive industry, the hot surface ignition device needs to be constantly operating, which shortens the service life of the hot surface ignition device used in these specific application fields compared to other application fields. In addition, the voltage fluctuates during use, and the operating conditions are complicated, for example, the voltage fluctuates between high and low voltages, and the temperature of the operating environment also fluctuates between low and high voltages, which have a significant impact on the heating element of the hot surface ignition device, thereby further shortening the service life of the hot surface ignition device.

[0003] Chinese Patent Application No. 110594783B discloses a method for controlling a hot surface ignition device. Based on the hardware circuit and software algorithm of the hot surface ignition device, the method divides the operating time of the hot surface ignition device into time periods t1, t2, ..., tn. During each time period, the software algorithm adjusts the output voltage or output power of the hardware circuit to make the hot surface ignition device reach a desired temperature. By using the control method of the present invention, the ignition time of the hot surface ignition device can be easily controlled, thereby meeting the needs of customers who require ignition within a short period of time. A drawback of the aforementioned prior art document is that the output voltage is sampled to control the output voltage and thus the temperature, but the temperature is not measured. Therefore, the temperature control during the control process is not precise enough. If the temperature of the hot surface ignition device becomes too high, the service life of the device will be shortened. Summary of the Invention [Means for solving the problem]

[0004] In order to solve the technical problem that the temperature control of the hot surface ignition device in the prior art is not accurate, which results in a shortened service life of the hot surface ignition device, the present invention provides a temperature control system for a hot surface ignition device, comprising: a power supply module for supplying power to the temperature control system; a memory module for storing the set target temperature in advance; a collection module for collecting and obtaining a current temperature of the hot surface igniter; a determination module for determining whether a current temperature of the hot surface ignition device matches a target temperature; a calculation module for, when the current temperature does not match the target temperature, performing calculation using the current temperature to obtain a temperature difference value between the target temperature and the current temperature, and obtaining a voltage control amount based on the temperature difference value; a control module for automatically controlling the output voltage of the power supply module based on the acquired voltage control amount until it is determined that the current temperature of the hot surface ignition device matches a target temperature; A temperature control system including:

[0005] In this solution, the current temperature of the hot surface igniter is collected, and then the determination module is operated in cooperation with the determination module to determine whether the current temperature is consistent with the set target temperature. If it is determined that the current temperature is not consistent with the target temperature, the calculation module uses the current temperature to perform calculations, and adjusts and controls the output voltage of the power supply module according to the calculated voltage control amount, so that the hot surface igniter obtains a suitable voltage and ensures that the hot surface igniter operates at the set target temperature, thereby precisely controlling the operating temperature of the hot surface igniter and extending the service life of the hot surface igniter.

[0006] Preferably, the storage module pre-stores a thermoelectric signal data table in an array format, the thermoelectric signal data table including a plurality of groups of voltage values ​​and corresponding temperature values, and the collection module collects the thermoelectric signal when a falling edge of the voltage signal of the hot surface igniter occurs, and obtains the current temperature of the hot surface igniter according to the thermoelectric signal data table. In this solution, the current temperature of the hot surface igniter is collected by collecting the thermoelectric signal, which is easy to operate.

[0007] Preferably, the collection module collects the electrical parameters when a rising edge of the voltage signal of the hot surface ignition device occurs, the determination module further determines whether the current power consumption state is abnormal based on the current electrical parameters, and the control module is further used to control the power supply module to stop power supply when it is determined that the current electrical environment is abnormal. In this solution, the electrical parameters collected by the collection module are also used to determine whether the power consumption state of the hot surface ignition device is abnormal. When an abnormality occurs, the power supply module stops power supply, and the hot surface ignition device will no longer operate at this point, thereby avoiding the problem of shortening the service life of the hot surface ignition device and direct damage to the hot surface ignition device due to continued operation in an abnormal state.

[0008] Preferably, the electrical parameter is a voltage parameter and / or a current parameter, and if the voltage parameter and / or the current parameter is abnormal, it is determined that the power consumption state is abnormal. In this solution, the voltage parameter and / or the current parameter is used as an indicator for determining whether the power consumption state of the hot surface ignition device is abnormal, so that the operation is simple.

[0009] Preferably, when calculating the voltage control amount, the calculation module first obtains the difference between the current temperature and the target temperature, multiplies this difference by a proportional coefficient, an integral coefficient, and a differential coefficient, respectively, and then adds the obtained products to obtain the voltage control amount. This solution is simple in operation, as it calculates the difference between the current temperature and the target temperature, then obtains the voltage control amount by multiplication and addition, and precisely controls the temperature by controlling the output voltage.

[0010] Preferably, the power supply module is used to output a driving voltage to the hot surface ignition device, and the control module controls the duration of the driving voltage output by the power supply module based on the voltage control amount. In this solution, the temperature of the hot surface ignition device is controlled by controlling the duration of the driving voltage output, and when the temperature needs to be increased, it is only necessary to extend the duration of the output, which is simple to operate.

[0011] Preferably, the power supply module is used to output a driving voltage that generates a forward current and a reverse current to the hot surface igniter, and the control module controls the magnitude of the effective value of the forward-reverse driving voltage output by the power supply module based on the voltage control amount. In this solution, the output driving voltage is a forward voltage that can generate a forward current and a reverse voltage that can generate a reverse current. Therefore, when it is necessary to adjust the temperature of the hot surface igniter, it is only necessary to adjust the magnitude of the effective value of the output forward driving voltage and reverse driving voltage, which is simple to operate.

[0012] In a second aspect, the present invention further provides a method for controlling the temperature of a hot surface ignition device, comprising: S1: Initializing the temperature control system; S2: controlling the output voltage; S3: Collecting and obtaining the current temperature of the hot surface igniter; S4: A step of determining whether the current temperature matches the target temperature, and if so, maintaining the current output voltage and executing step S2, and if not, proceeding to step S5; S5: calculating the current temperature to obtain a voltage control amount, returning to step S2, and adjusting the output voltage based on the obtained voltage control amount; S6: A step of receiving a stop signal and turning off the output voltage The present invention provides a method comprising:

[0013] Preferably, in step S2, the output voltage is adjusted and controlled by adjusting the output method by PWM.

[0014] Preferably, in step S3, when a falling edge of the voltage signal of the hot surface ignition device occurs, the thermoelectric signal is collected, and the current temperature of the hot surface ignition device is obtained based on a preset thermoelectric signal data table, and the preset thermoelectric signal data table includes multiple groups of voltage values ​​and corresponding temperature values.

[0015] Preferably, in step S3, when a rising edge of the voltage signal of the hot surface ignition device occurs, electrical parameters are further collected, and it is determined whether the current electrical environment is abnormal based on the electrical parameters. If it is determined that the current electrical environment is abnormal, proceed to step S6, and if it is determined that the current electrical environment is normal, continue executing step S3. [Effects of the Invention]

[0016] The present invention has the following beneficial effects. 1. In the temperature control system provided in the present invention, the thermoelectric signal of the hot surface ignition device is collected, and then the current temperature of the hot surface ignition device is collected. Then, calculations are performed based on the current temperature, and the calculation results are used to control the output voltage, so that the output voltage is adjusted reasonably to ensure that the hot surface ignition device obtains a suitable voltage, thereby precisely controlling the temperature of the hot surface ignition device and extending the service life of the hot surface ignition device. 2. In this invention, power is supplied by a PWM pulsed square wave voltage, and when the falling edge of the voltage signal occurs, the thermoelectric signal is collected to measure the temperature. When the rising edge of the voltage signal occurs, electrical parameters are collected to determine the electrical environment. In other words, by using the power supply mode using a PWM pulsed square wave voltage, the requirements for both temperature measurement and electrical environment determination can be met. 3. In the present invention, the voltage control amount for controlling the output voltage is obtained by calculation based on multiplication and addition based on the difference between the current temperature and the target temperature, which allows the temperature of the hot surface ignition device to be precisely controlled and avoids the problem of damage to the hot surface ignition device or shortening of its service life caused by the temperature of the hot surface ignition device becoming too high. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a module block diagram of a temperature control system and a temperature control method for a hot surface ignition device according to a first embodiment of the present invention. FIG. [Figure 2] 3 is a flowchart of a temperature control method according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will now be described in more detail with reference to specific embodiments.

[0019] Embodiment 1 This embodiment is basically as shown in FIG. 1. A temperature control system for a hot surface ignition device, comprising: a power supply module for supplying power to the temperature control system; a memory module for storing in advance a set target temperature and a thermoelectric signal data table in an array format; a collection module for collecting and obtaining a current temperature of the hot surface igniter; a determination module that determines whether a current temperature of the hot surface igniter matches a target temperature and determines whether a current power consumption state is abnormal based on the current electrical parameters; a calculation module for, when the current temperature does not match the target temperature, performing calculation using the current temperature to obtain a temperature difference value between the target temperature and the current temperature, and obtaining a voltage control amount based on the temperature difference value; a control module for automatically controlling the output voltage of the power supply module based on the acquired voltage control amount until it is determined that the current temperature of the hot surface ignition device matches the target temperature, and for controlling the power supply module to stop power supply when it is determined that the current electrical environment is abnormal; A temperature control system including: The thermoelectric signal data table includes multiple groups of voltage values ​​and corresponding temperature values. Specifically, the collection module collects the thermoelectric signal when a falling edge of the voltage signal of the hot surface igniter occurs, and obtains the current temperature of the hot surface igniter based on the thermoelectric signal data table. The collection module also collects the electrical parameter when a rising edge of the voltage signal of the hot surface igniter occurs. In this embodiment, the electrical parameter is a voltage parameter and / or a current parameter. Specifically, the determination module determines that the power consumption state is abnormal when the voltage parameter and / or the current parameter is abnormal. In this embodiment, when calculating the voltage control amount, the calculation module first obtains the difference between the current temperature and the target temperature, multiplies this difference by a proportional coefficient, an integral coefficient, and a differential coefficient, respectively, and then adds the obtained products to obtain the voltage control amount.

[0020] The thermoelectric signal data table is a data table for temperature conversion. The voltage value Vt of the thermoelectric signal is obtained by an ADC (mode converter), where the voltage value is inherently correlated with the temperature of the hot surface ignition device. That is, a certain voltage value Vt corresponds to a specific temperature value T. For example, when T=800°C, the corresponding voltage value is Vt=0.373V. The thermoelectric signal data table is created in array format, with the temperature as the array index and Vt as the array element value.

[0021] In the above process, the power supply module may use a PWM square wave power supply mode, a DC power supply mode, or a sine wave AC power supply mode. In this embodiment, as shown in Figure 2, a PWM pulsed square wave voltage is taken as an example, and a temperature control method for a hot surface ignition device is further disclosed based on the above temperature control system, and this temperature control method includes: S1: Initializing the temperature control system; S2: Adjusting the PWM output to control the output voltage; S3: When a falling edge of the voltage signal of the hot surface igniter occurs, i.e., during the Toff period of PWM, open the thermoelectric signal channel to collect the thermoelectric signal; after collecting the thermoelectric signal, immediately close the thermoelectric signal channel and filter the collected thermoelectric signal to obtain an effective thermoelectric signal; then, obtain the current temperature of the hot surface igniter based on the preset thermoelectric signal data table; when a rising edge of the voltage signal of the hot surface igniter occurs, i.e., during the Ton period of PWM, collect electrical parameters and determine whether the current electrical environment is abnormal based on the electrical parameters; if it is determined that the current electrical environment is abnormal, proceed to step S6; if it is determined that the current electrical environment is normal, continue executing step S3; when determining whether the current electrical environment is abnormal, for example, if voltage is used as the electrical parameter, determine that the current electrical environment is abnormal if it is determined that the current voltage parameter exceeds the rated voltage parameter of the hot surface igniter; S4: A step of determining whether the current temperature matches the target temperature, and if so, maintaining the current output voltage and executing step S2, and if not, proceeding to step S5; S5: Calculate the current temperature to obtain a voltage control amount, and return to step S2 to adjust the output voltage based on the obtained voltage control amount; when adjusting the output voltage, adjust the ratio of the Ton period to the Toff period in the PWM pulsed square wave voltage based on the voltage control amount to ensure that the hot surface ignition device obtains a suitable voltage, thereby ensuring that the hot surface ignition device operates at the set target temperature; and S6: A step of receiving a stop signal and turning off the output voltage Includes:

[0022] Embodiment 2 This embodiment differs from the first embodiment in the following respects. In this embodiment, the power supply module supplies power in a DC power supply mode at a constant temperature. In this power supply mode, the temperature of the hot surface igniter is adjusted by adjusting the duration of the power supply. Specifically, after the power supply module supplies voltage to the hot surface igniter for a certain period of time, the power supply module stops supplying power. The collection module instantly collects and acquires the current temperature of the hot surface igniter. Then, the determination module determines whether the current temperature of the hot surface igniter matches the target temperature and controls the power supply time of the power supply module based on the acquired voltage control amount. In this power supply mode, the voltage supplied to the hot surface igniter is turned off in a timed manner for a short period of time, for example, 0.1 milliseconds. This 0.1 millisecond period is used to perform temperature measurement and calculation, and then the power supply module immediately resumes supplying power. Furthermore, because the hot surface igniter has a certain degree of thermal inertia, turning off the voltage for such a short period of time does not affect the temperature continuity of the hot surface igniter. Therefore, a normal temperature rise of the hot surface ignition device can be ensured.

[0023] The above description relates only to the embodiments of the present invention, and does not intentionally describe general knowledge, such as specific known structures or known features, in the solutions of the present invention. It is believed that a person skilled in the art would be familiar with all common technical knowledge in the technical field to which the present invention pertains, be able to use all prior art in the technical field, and be able to carry out ordinary experimental procedures before the filing date or priority date of this application. It is also believed that a person skilled in the art would be able to improve the solutions of the present invention and implement the solutions of the present invention using the motivation provided by this application as a starting point. Generally known structures or generally known methods do not hinder a person skilled in the art from implementing this application. It is also important to note that a person skilled in the art may make various modifications and improvements without departing from the structure of the present invention, and such modifications and improvements are also within the scope of protection of the present invention, and do not affect the effects of implementing the present invention or the applicability of the patent of this application. The scope of protection of this application is governed by the claims, and the disclosure of specific embodiments, etc. in this specification can be used to interpret the claims.

Claims

1. 1. A temperature control system for a hot surface ignition device, comprising: a power supply module for supplying power to the temperature control system; a memory module for storing the set target temperature in advance; a collection module for collecting and obtaining a current temperature of the hot surface igniter; a determination module for determining whether a current temperature of the hot surface ignition device matches a target temperature; a calculation module for calculating a temperature difference between the target temperature and the current temperature when the current temperature does not match the target temperature, obtaining the temperature difference, and obtaining a voltage control amount based on the temperature difference; a control module for automatically controlling the output voltage of the power supply module based on the acquired voltage control amount until it is determined that the current temperature of the hot surface ignition device matches a target temperature; A temperature control system for a hot surface ignition device, including:

2. The storage module pre-stores a thermoelectric signal data table in an array format, the thermoelectric signal data table including a plurality of groups each consisting of a voltage value and a corresponding temperature value; When a falling edge of the voltage signal of the hot surface igniter occurs, the collection module collects the thermoelectric signal and obtains the current temperature of the hot surface igniter according to the thermoelectric signal data table.

10. A temperature control system for a hot surface ignition device according to claim 1.

3. the collection module collects electrical parameters when a rising edge of a voltage signal of the hot surface igniter occurs; the determining module further determines whether a current power consumption state is abnormal based on the current electrical parameters; When it is determined that the current electrical environment is abnormal, the control module is further used to control the power supply module to stop power supply.

3. A temperature control system for a hot surface ignition device according to claim 2.

4. 4. The temperature control system for a hot surface ignition device as claimed in claim 3, wherein the electrical parameter is a voltage parameter and / or a current parameter, and when the voltage parameter and / or the current parameter is abnormal, the power consumption state is determined to be abnormal.

5. 5. The temperature control system for a hot surface ignition device according to claim 1, wherein when the calculation module calculates the voltage control amount, it first obtains a difference between the current temperature and the target temperature, multiplies this difference by a proportional coefficient, an integral coefficient, and a differential coefficient, respectively, and then adds the obtained products to obtain the voltage control amount.

6. 2. The temperature control system for a hot surface igniter as described in claim 1, wherein the power supply module is used to output a driving voltage to the hot surface igniter, and the control module controls the duration of the driving voltage output by the power supply module based on the voltage control amount.

7. 2. The temperature control system for a hot surface igniter as described in claim 1, wherein the power supply module is used to output a drive voltage to the hot surface igniter that generates a forward current and a reverse current, and the control module controls the magnitude of the effective value of the forward drive voltage and the reverse drive voltage output by the power supply module based on the voltage control amount.

8. 1. A method for controlling the temperature of a hot surface ignition device, comprising: S1: Initializing the temperature control system; S2: controlling the output voltage; S3: Collecting and obtaining the current temperature of the hot surface igniter; S4: Determine whether the current temperature matches the target temperature, and if so, maintain the current output voltage and execute step S2; if not, proceed to step S5; S5: Obtaining a voltage control amount by performing calculations using the current temperature, and returning to step S2 to adjust the output voltage based on the obtained voltage control amount; S6: Receives a stop signal and turns off the output voltage A method for controlling the temperature of a hot surface ignition device, comprising:

9. 9. The temperature control method for a hot surface ignition device according to claim 8, wherein in step S2, the output voltage is adjusted and controlled by adjusting the output method by PWM.

10. In step S3, when a falling edge of the voltage signal of the hot surface ignition device occurs, collect a thermoelectric signal, and obtain a current temperature of the hot surface ignition device according to a preset thermoelectric signal data table; the preset thermoelectric signal data table includes a plurality of groups each consisting of a voltage value and a corresponding temperature value; 10. The method of claim 9, wherein the temperature of a hot surface ignition device is controlled by the temperature control.

11. In step S3, when a rising edge of the voltage signal of the hot surface ignition device occurs, further collect electrical parameters, and determine whether the current electrical environment is abnormal based on the electrical parameters; If it is determined that the current electrical environment is abnormal, proceed to step S6. If it is determined that the current electrical environment is normal, the execution of step S3 is continued.

11. The method of claim 10, wherein the temperature of a hot surface ignition device is controlled by the temperature control.

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