CN-121977198-A - Solid heat storage electric boiler and leakage detection method thereof

CN121977198ACN 121977198 ACN121977198 ACN 121977198ACN-121977198-A

Abstract

The invention discloses a solid heat storage electric boiler and a leakage detection method thereof. The solid heat storage electric boiler leakage detection method comprises the steps of detecting ultrasonic signals of at least two positions in the wind-water heat exchanger, filtering the ultrasonic signals of the at least two positions to obtain first high-frequency voltage signals of the at least two positions in a first frequency interval, correspondingly generating first current signals according to the first high-frequency voltage signals, judging whether leakage occurs according to the relation between the first current signals and a first preset current range, and enabling the current of the first current signals to be in direct proportion to leakage intensity. The invention improves the effect of leakage detection.

Inventors

WANG XIAOMEI
WEI YILONG
WANG ZHANCHAO
WANG DUJIAN
YANG QIYAO
CHAI JINRONG
PAN XINGDONG
HUANG DONGFENG

Assignees

中煤科工清洁能源股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260203

Claims (10)

1. A leakage detection method of a solid heat storage electric boiler is characterized in that the solid heat storage electric boiler comprises a solid heat storage device, a wind-water heat exchanger and a variable frequency circulating fan, wherein wind output by the variable frequency circulating fan is circularly transmitted to the variable frequency circulating fan after passing through the solid heat storage device and the wind-water heat exchanger; The solid heat storage electric boiler leakage detection method comprises the following steps: detecting ultrasonic signals at least two positions in the wind-water heat exchanger; filtering the ultrasonic signals of at least two positions to obtain first high-frequency voltage signals of at least two positions in a first frequency interval; And correspondingly generating a first current signal according to each first high-frequency voltage signal, and judging whether leakage occurs according to the relation between each first current signal and a first preset current range, wherein the current of the first current signal is in direct proportion to the leakage intensity.
2. The method according to claim 1, wherein the generating a first current signal according to the correspondence of each of the first high-frequency voltage signals, and determining whether leakage occurs according to a relationship between each of the first current signals and a first preset current range comprises: And judging that leakage occurs when the first current signals of at least two positions are not in a first preset current range and the first abnormal time is maintained.
3. The method for detecting leakage of a solid heat storage electric boiler according to claim 1, wherein the detecting ultrasonic signals of at least two places in the wind-water heat exchanger comprises: The method comprises the steps that first ends of at least two sound wave probe rods are inserted into different positions in the wind-water heat exchanger, second ends of the sound wave probe rods are connected with ultrasonic sensors, and the ultrasonic sensors are used for detecting ultrasonic signals in the wind-water heat exchanger through the sound wave probe rods.
4. The solid state heat storage electric boiler leak detection method according to claim 1, wherein the generating a first current signal from each of the first high frequency voltage signals correspondingly comprises: correspondingly converting each first high-frequency voltage signal into a direct-current voltage signal, wherein the direct-current voltage signal is converted by collecting the first high-frequency voltage signal within a first preset time and calculating root mean square; and correspondingly converting each direct-current voltage signal into the first current signal through a voltage-current converter, wherein the first current signal is in direct proportion to the direct-current voltage signal.
5. The solid heat storage electric boiler leakage detection method according to claim 1, wherein after the generating of the first current signal according to the correspondence of each of the first high frequency voltage signals, judging whether leakage occurs according to the relation between each of the first current signals and a first preset current range, comprising: Detecting ultrasonic signals at least two positions in the solid heat storage device; Filtering the ultrasonic signals of at least two positions to obtain second high-frequency voltage signals of at least two positions in a second frequency interval; And generating a second current signal according to each second high-frequency voltage signal, and judging that the humidity in the solid heat storage device is abnormal when the second current signals at least two positions are not in a second preset current range and the first abnormal time is maintained.
6. The solid heat storage electric boiler leak detection method according to claim 5, wherein the detecting ultrasonic signals at least two positions in the solid heat storage device comprises: The method comprises the steps of inserting first ends of at least two sound wave probe rods into a wire inlet position in the solid heat storage device, inserting the first ends of the at least two sound wave probe rods into an upper middle position in the solid heat storage device, inserting the first ends of the at least two sound wave probe rods into a lower position in the solid heat storage device, and connecting second ends of the sound wave probe rods with ultrasonic sensors, wherein the ultrasonic sensors are used for detecting ultrasonic signals of all positions through the sound wave probe rods.
7. The method according to claim 6, wherein the generating a second current signal from each of the second high-frequency voltage signals, and when none of the second current signals at least two positions is in a second preset current range and a first abnormality time is maintained, determining that humidity in the solid heat storage device is abnormal includes: when the second current signals of the wire inlet positions in the two solid heat storage devices exceed a second preset current range, judging that the humidity of the wire inlet positions in the solid heat storage devices is too high; When the second current signals of the middle and upper positions in the two solid heat storage devices exceed a second preset current range, judging that the humidity of the middle and upper positions in the solid heat storage devices is too high; and when the second current signals of the lower positions in the two solid heat storage devices exceed a second preset current range, judging that the humidity of the lower positions in the solid heat storage devices is too high.
8. The solid heat accumulating electric boiler leak detection method according to claim 1, characterized in that the solid heat accumulating electric boiler leak detection method further comprises: Detecting the wind pressure of an air inlet and the wind pressure of an air outlet in the wind-water heat exchanger; calculating a wind pressure difference value between the wind pressure of the air inlet and the wind pressure of the air outlet; If the wind pressure of the air outlet gradually rises, the wind pressure difference value gradually rises and the first current signal gradually increases, judging that the wind-water heat exchanger leaks.
9. The solid heat accumulating electric boiler leak detection method according to claim 1, characterized in that the solid heat accumulating electric boiler leak detection method further comprises: Detecting the flow of a water inlet and the flow of a water outlet in the wind-water heat exchanger; calculating a flow difference value between the flow of the water inlet and the flow of the water outlet; and if the flow difference value gradually rises, judging that the wind-water heat exchanger leaks.
10. The solid heat storage electric boiler is characterized by comprising a solid heat storage device, a wind-water heat exchanger, a variable frequency circulating fan and a controller; the wind output by the variable frequency circulating fan is circularly transmitted to the variable frequency circulating fan after passing through a solid heat storage device and a wind-water heat exchanger; the first water side flow sensor is arranged at the water outlet of the wind-water heat exchanger and used for detecting the flow of the water outlet; the first wind pressure sensor is arranged at the air inlet of the wind-water heat exchanger and used for detecting the wind pressure of the air inlet; the solid heat storage device and the wind-water heat exchanger are respectively inserted with an acoustic probe rod, and the acoustic probe rods are used for transmitting ultrasonic signals in the solid heat storage device and the wind-water heat exchanger to the ultrasonic sensor; The controller is connected with the variable frequency circulating fan, the first water side flow sensor, the second water side flow sensor, the first wind pressure sensor, the second wind pressure sensor and each ultrasonic sensor, and the controller is used for executing the solid heat storage electric boiler leakage detection method according to any one of claims 1-9.

Description

Solid heat storage electric boiler and leakage detection method thereof Technical Field The invention relates to the technical field of boiler equipment detection, in particular to a solid heat storage electric boiler and a leakage detection method thereof. Background In the running process of the boiler, water molecules in the air in a high-temperature environment mainly exist in a gaseous form and have no conductivity. However, as the boiler releases heat, water vapor inside the boiler condenses into liquid water molecules, resulting in an increase in the moisture content of the air. At this time, if a large amount of liquid water molecules exist in the environment, the phenomenon of corona discharge of the resistance wire in the solid heat storage device is easily caused, and the electric safety of the boiler is seriously affected. Therefore, the moisture content in the air must be monitored in real time to find possible leakage conditions of the electric boiler in time. However, it is common in the art to provide humidity sensors directly for monitoring. Whether leakage occurs is judged by monitoring and comparing changes in absolute humidity or moisture content of air in real time. When the internal temperature of the boiler is high, the measurement reference of the humidity sensor may drift or even be completely misaligned, and the detection effect on leakage is poor. Disclosure of Invention The invention provides a method, a device, equipment and a storage medium, which are used for solving the problem of poor leakage detection effect. According to one aspect of the invention, a leakage detection method of a solid heat storage electric boiler is provided, wherein the solid heat storage electric boiler comprises a solid heat storage device, a wind-water heat exchanger and a variable frequency circulating fan, and wind output by the variable frequency circulating fan is circularly transmitted to the variable frequency circulating fan after passing through the solid heat storage device and the wind-water heat exchanger; The solid heat storage electric boiler leakage detection method comprises the following steps: detecting ultrasonic signals at least two positions in the wind-water heat exchanger; filtering the ultrasonic signals of at least two positions to obtain first high-frequency voltage signals of at least two positions in a first frequency interval; And correspondingly generating a first current signal according to each first high-frequency voltage signal, and judging whether leakage occurs according to the relation between each first current signal and a first preset current range, wherein the current of the first current signal is in direct proportion to the leakage intensity. Optionally, the generating a first current signal according to the first high-frequency voltage signals correspondingly, and the judging whether leakage occurs according to the relation between the first current signals and a first preset current range includes: And judging that leakage occurs when the first current signals of at least two positions are not in a first preset current range and the first abnormal time is maintained. Optionally, the detecting ultrasonic signals of at least two places in the geomantic omen heat exchanger includes: The method comprises the steps that first ends of at least two sound wave probe rods are inserted into different positions in the wind-water heat exchanger, second ends of the sound wave probe rods are connected with ultrasonic sensors, and the ultrasonic sensors are used for detecting ultrasonic signals in the wind-water heat exchanger through the sound wave probe rods. Optionally, the generating the first current signal according to each of the first high frequency voltage signals includes: correspondingly converting each first high-frequency voltage signal into a direct-current voltage signal, wherein the direct-current voltage signal is converted by collecting the first high-frequency voltage signal within a first preset time and calculating root mean square; and correspondingly converting each direct-current voltage signal into the first current signal through a voltage-current converter, wherein the first current signal is in direct proportion to the direct-current voltage signal. Optionally, after the generating the first current signal according to the correspondence of each of the first high-frequency voltage signals, determining whether leakage occurs according to a relationship between each of the first current signals and a first preset current range includes: Detecting ultrasonic signals at least two positions in the solid heat storage device; Filtering the ultrasonic signals of at least two positions to obtain second high-frequency voltage signals of at least two positions in a second frequency interval; And generating a second current signal according to each second high-frequency voltage signal, and judging that the humidity in the solid heat storage device is abnor