CN-121977292-A - Control method, controller and storage medium for hot air generating device

CN121977292ACN 121977292 ACN121977292 ACN 121977292ACN-121977292-A

Abstract

The application relates to a control method, a controller and a storage medium of hot air generating equipment. According to the application, the reference database containing the environmental temperature compensation coefficient is constructed, and the dynamic reference temperature difference and the dynamic double threshold value are generated by combining the real-time working condition, so that the false alarm rate and the false alarm rate under multiple working conditions are greatly reduced. And the device state is output by combining the comparison result of the real-time temperature difference and the dynamic double threshold value and the verification result of the temperature difference change rate, so that the accuracy and the reliability of blockage detection are effectively improved. In the blocking fault state, the blocking of the air pipe assembly and the fault of the air supply device are distinguished based on the operation parameters of the air supply device, the fault source is directly positioned, the maintenance time is obviously shortened, and the maintenance cost is reduced. The application solves the scalding risk caused by blockage of the hot air equipment from the technical aspect, can reduce the occurrence rate of clinical adverse events in the medical field, and provides safer treatment guarantee for patients.

Inventors

CHEN YUJING
Tu Yezhi
WU YINGXIANG
WU YOUFEN

Assignees

广东正知医学科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260316

Claims (10)

1. The control method of the hot air generating equipment is characterized by being applied to a control system of the hot air generating equipment, wherein the control system comprises an air supply device, a heating device, an air pipe assembly, a first temperature detection element, a second temperature detection element and a controller, the first temperature detection element is arranged between an air outlet end of the heating device and an air inlet end of the air pipe assembly, and the second temperature detection element is arranged at the air outlet end of the air pipe assembly; The control method comprises the following steps: Collecting reference temperature difference, temperature set values, air quantity gear and environmental temperature data under each steady-state working condition, and constructing a reference database containing environmental temperature compensation coefficients; When the hot air generating equipment operates, the current target temperature set value, the target air quantity gear and the real-time environment temperature are collected in real time, and the dynamic reference temperature difference adapting to the target working condition is obtained after the reference database is combined and corrected by the environment temperature compensation coefficient; Based on the dynamic reference temperature difference, setting an early warning threshold value and a blocking threshold value corresponding to the target working condition to form a dynamic double threshold value; calculating a real-time temperature difference and a temperature difference change rate based on the first temperature detection element and the second temperature detection element, and outputting equipment states of the hot air generating equipment based on a comparison result of the real-time temperature difference and the dynamic double threshold value and a verification result of the temperature difference change rate, wherein the equipment states comprise normal, blockage early warning or blockage faults; And under the condition that the equipment state is a blockage fault, determining the fault type of the hot air generating equipment based on the operation parameters of the air supply device, wherein the fault type comprises air pipe assembly blockage and air supply device fault.
2. The control method according to claim 1, wherein the step of collecting the reference temperature difference, the temperature set value, the air volume gear and the ambient temperature data under each steady-state condition to construct a reference database including the ambient temperature compensation coefficient comprises: before the hot air generating equipment runs for the first time, the air outlet of the hot air generating equipment is ensured to be free from shielding, the air pipe assembly is ensured to be free from blocking, and the ambient temperature is in a stable state; Controlling the hot air generating equipment to sequentially switch the combined working conditions of a temperature set value and an air quantity gear, and maintaining stable operation for a set period of time under each combined working condition until the hot air generating equipment enters a thermal steady-state working condition; Under each thermal steady-state working condition, synchronously acquiring temperature data of the first temperature detection element and the second temperature detection element, calculating a reference temperature difference, and simultaneously acquiring temperature set values, air volume gears and environmental temperature data corresponding to the current thermal steady-state working condition; The reference temperature difference, the temperature set value, the air quantity gear and the environmental temperature data acquired under the combined working condition are stored in an associated mode according to a corresponding relation, and a mapping relation between an environmental temperature compensation coefficient and the environmental temperature data is established to form the reference database; The environmental temperature compensation coefficient is used for correcting the reference temperature difference under different environmental temperatures so that the reference temperature difference is adapted to environmental temperature fluctuation.
3. The control method according to claim 1, wherein when the hot air generating device is operated, collecting the current target temperature set value, the target air volume gear and the real-time environmental temperature in real time, combining the reference database and correcting by the environmental temperature compensation coefficient to obtain a dynamic reference temperature difference adapting to the target working condition, and includes: Collecting a current target temperature set value, a target air quantity gear and a real-time environment temperature in real time; searching a target reference temperature difference under the target working condition from the reference database based on the target working condition consisting of the target temperature set value and the target air quantity gear; if the target working condition exists in the reference database, according to the real-time environment temperature, calling a target temperature compensation coefficient corresponding to the real-time environment temperature in the reference database, and correcting the target reference temperature difference; And if the target working condition does not exist in the reference database, obtaining a preliminary reference temperature difference based on a similar reference temperature difference of a similar working condition similar to the target working condition, and carrying out secondary correction on the preliminary reference temperature difference by combining a similar environment temperature compensation coefficient corresponding to the actual environment temperature to obtain the dynamic reference temperature difference.
4. The control method according to claim 3, wherein the obtaining the preliminary reference temperature difference based on the similar reference temperature difference of the similar working condition similar to the target working condition, and performing the secondary correction on the preliminary reference temperature difference by combining the target temperature compensation coefficient corresponding to the actual environment temperature to obtain the dynamic reference temperature difference includes: Setting a temperature difference threshold and a wind difference threshold, and screening working conditions that the difference value between a temperature set value and the target temperature set value does not exceed the temperature difference threshold and the difference value between the wind speed gear and the target wind speed gear does not exceed the wind speed difference threshold from the reference database to serve as candidate similar working conditions; If the candidate similar working conditions are not less than two groups, selecting two groups with the smallest difference value with the target working conditions as the similar working conditions, and if only one group of candidate similar working conditions is selected, combining adjacent working conditions in the reference database to supplement the other group of similar working conditions; extracting two groups of similar reference temperature differences, similar temperature set values, similar air quantity gears and similar environment temperature compensation coefficients corresponding to the similar working conditions; Setting a corresponding weight distribution rule according to the difference degree of the target working condition and the two groups of similar working conditions on a temperature set value and an air quantity gear, and carrying out weighting operation on the similar reference temperature differences of the two groups of similar working conditions by adopting an interpolation algorithm to obtain the preliminary reference temperature difference; And calling a target temperature compensation coefficient matched with the actual environment temperature from the reference database to replace the similar environment temperature compensation coefficient based on the actual environment temperature, and correcting the preliminary reference temperature difference to obtain the dynamic reference temperature difference.
5. The control method according to claim 1, wherein the setting the early warning threshold and the blocking threshold corresponding to the target working condition based on the dynamic reference temperature difference to form a dynamic double threshold includes: A set threshold deviation rule matched with the target working condition is called from the reference database, wherein the set threshold deviation rule comprises an early warning deviation amount and a blocking deviation amount matched with the dynamic reference temperature difference, and the blocking deviation amount is larger than the early warning deviation amount; according to the set threshold deviation rule, the dynamic reference temperature difference is respectively overlapped with the early warning deviation amount and the blocking deviation amount, and an initial early warning threshold value and an initial blocking threshold value under the target working condition are calculated; verifying rationality and adaptively correcting the initial early warning threshold and the initial blocking threshold until the gradient relation that the initial early warning threshold is larger than the initial blocking threshold is met; And determining the initial early warning threshold and the initial blocking threshold which meet the gradient relation as an effective early warning threshold and an effective blocking threshold to form the dynamic double threshold, wherein the dynamic double threshold is synchronously adjusted along with the change of the dynamic reference temperature difference.
6. The control method according to claim 1, wherein the calculating a real-time temperature difference and a temperature difference change rate based on the first temperature detecting element and the second temperature detecting element, and outputting the device state of the hot air generating device based on a comparison result of the real-time temperature difference and the dynamic double threshold value in combination with a verification result of the temperature difference change rate, comprises: according to the real-time monitoring data of the first temperature detection element and the second temperature detection element, calculating to obtain the real-time temperature difference, and simultaneously calculating to obtain the temperature difference change rate based on the real-time temperature difference acquired in time sequence; comparing the real-time temperature difference with the dynamic double threshold value; if the real-time temperature difference is below the early warning threshold, judging that the equipment state is normal; If the real-time temperature difference is between the early warning threshold and the blockage threshold or above the blockage threshold, and the duration time and the temperature difference change rate of the real-time temperature difference maintenance corresponding interval accord with preset judging conditions, judging that the blockage early warning is performed; If the real-time temperature difference is above the blockage threshold value, and the duration time of the real-time temperature difference maintenance corresponding section and the temperature difference change rate meet preset judging conditions, judging that the blockage fault state exists; And outputting the equipment state according to a comparison result with the dynamic double threshold value and a verification result with the threshold value out of range.
7. The control method according to claim 1, wherein the determining the type of the failure of the hot air generating apparatus based on the operation parameter of the air blowing device in the case where the apparatus state is a clogging failure includes: When the equipment state is judged to be a blockage fault, the operation parameters of the air supply device are called in real time, wherein the operation parameters are parameters related to air supply power output; Comparing the operation parameter of the air supply device with a reference parameter range, and judging whether the operation parameter is in the reference parameter range; If the operation parameter is in the reference parameter range, judging that the fault type of the hot air generating equipment is that the air pipe assembly is blocked; and if the operation parameter is out of the reference parameter range, judging that the fault type of the hot air generating equipment is the fault of the air supply device.
8. The control method according to claim 1, characterized by further comprising, before the step of outputting the device state of the hot air generating device based on the first temperature detecting element and the second temperature detecting element, calculating a real-time temperature difference and a temperature difference change rate, based on a comparison result of the real-time temperature difference and the dynamic double threshold, in combination with a verification result of the temperature difference change rate: real-time monitoring the actual air quantity or the actual air speed of the air supply device; And if the detected instantaneous decreasing rate of the actual air quantity is larger than the target air quantity or the detected actual air speed is smaller than the set air speed, reducing the heating power of the hot air generating equipment to a set range, and maintaining the set buffer time.
9. A controller, characterized in that the control system applied to the hot air generating device comprises an air supply device, a heating device, an air pipe assembly, a first temperature detection element, a second temperature detection element and the controller, wherein the first temperature detection element is configured between an air outlet end of the heating device and an air inlet end of the air pipe assembly, and the second temperature detection element is configured at the air outlet end of the air pipe assembly; the controller includes: The construction module is used for acquiring the reference temperature difference, the temperature set value, the air quantity gear and the environmental temperature data under each steady-state working condition and constructing a reference database containing the environmental temperature compensation coefficient; the acquisition module is used for acquiring a current target temperature set value, a target air quantity gear and a real-time environment temperature in real time when the hot air generating device is operated, and acquiring a dynamic reference temperature difference adapting to a target working condition after combining the reference database and correcting by the environment temperature compensation coefficient; The setting module is used for setting an early warning threshold value and a blocking threshold value corresponding to the target working condition based on the dynamic reference temperature difference to form a dynamic double threshold value; The state judging module is used for calculating a real-time temperature difference and a temperature difference change rate based on the first temperature detecting element and the second temperature detecting element, and outputting the equipment state of the hot air generating equipment based on a comparison result of the real-time temperature difference and the dynamic double threshold value and a verification result of the temperature difference change rate, wherein the equipment state comprises normal, blockage early warning or blockage faults; And the fault judging module is used for determining the fault type of the hot air generating equipment based on the operation parameters of the air supply device under the condition that the equipment state is a blockage fault, wherein the fault type comprises air pipe assembly blockage and air supply device faults.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a program that can be loaded by a processor and that executes the control method of the hot air generating apparatus according to any one of claims 1 to 8.

Description

Control method, controller and storage medium for hot air generating device Technical Field The application relates to the technical field of equipment detection, in particular to a control method, a controller and a storage medium of hot air generation equipment. Background In the clinical medical field, medical hot air medical instruments (such as a temperature management device in operation, a breathing support hot air humidifying device, a neonate warming and nursing device and the like) become core devices for guaranteeing the treatment safety of patients, and are widely applied to key departments such as a technical department, an anesthesia department, a severe intensive care ward (IntensiveCareUnit, ICU), a neonate department and the like, and the core functions of the medical hot air medical instruments are to provide constant temperature hot support for patients, prevent hypothermia, improve breathing environment and the like by accurately regulating and controlling the temperature and the air quantity of hot air. The hot air generating equipment refers to electromechanical equipment capable of generating, heating and directionally conveying hot air, and is mainly used for scenes such as industrial hot air drying, site heating, hot air conveying and temperature control operation. When the hot air generating equipment operates, hot air is conveyed by virtue of the air pipe assembly, the air pipe assembly is easy to block, the air supply device is easy to operate abnormally, and the hot air output efficiency and the equipment operation safety can be directly influenced. When the medical hot air heating equipment (such as a heating instrument) is used in departments such as ICU, operation departments, anesthesia departments and the like, cotton wool and impurities are easily adsorbed for a long time by an air inlet filter screen, a pipeline is flattened and distorted, or an air outlet of an air pipe is blocked and blocked by various clinical common factors such as blocking, and the like, so that the air inlet of the equipment is not smooth and the air outlet is blocked. Cold air cannot normally enter the heating device, and heated hot air cannot be smoothly conveyed to the patient end. Under this condition, the device remote temperature detection element can not accurately detect the actual output temperature, and the device remote temperature detection element can misjudge that the temperature does not reach the standard, so as to control the heater to continuously heat. If the blockage state continuously occurs, the heater is overheated and the core components of the equipment are damaged, and when the blockage state is serious, a fire disaster is caused, so that the life safety of doctors and patients is endangered. If the device is intermittently blocked, high-temperature air accumulated in the blocking process can be intermittently conveyed to the surface of a patient, so that the patient is extremely easy to scald. At present, scalding, equipment damage and even fire related medical accidents caused by blockage of a temperature rising instrument become common safety pain points to be solved urgently in the field of global medical treatment, and clinical diagnosis and treatment safety and doctor-patient rights are seriously threatened. Clinical data and cases show that the blockage problem of medical hot air equipment directly causes great safety risks such as thermal injury of patients, overheating of equipment and the like, namely when the air inlet of an air pipe is not smooth or the outlet is blocked, the air supply device cannot normally convey air flow, a large amount of high-temperature hot air can be rapidly accumulated around the heating cavity and the heater, and heat cannot be discharged along with the air flow. At this time, the temperature detection element at the far end of the equipment cannot acquire the real output temperature, and the heater is continuously driven to heat, so that the temperature of the hot gas accumulated in the equipment is rapidly increased. If the blockage is in an intermittent state, accumulated high-temperature air can be instantaneously pushed to the patient end to form sudden high-temperature air flow impact, and even if the display temperature of the equipment panel is normal, the output air flow temperature can far exceed the safe tolerance range of a human body, and skin scalding of the patient is extremely easy to cause. At present, scalding medical accidents caused by blockage of a temperature rising instrument become common safety pain points to be solved urgently in the field of global medical treatment. Patients in medical scenes (such as anesthesia unconscious patients, infants with thin and tender skin and elderly patients with inconvenient actions) cannot avoid or express discomfort autonomously, are extremely easy to scald by a high-temperature pipeline, cause two-degree and even three-degree heat injury, not only aggravate pain of the patie