CN-122015117-A - Gas furnace control method and system suitable for multiple load working conditions

CN122015117ACN 122015117 ACN122015117 ACN 122015117ACN-122015117-A

Abstract

The invention discloses a gas furnace control method and a system suitable for multiple load working conditions, wherein the method comprises the steps of collecting smoke generated in the operation process of a gas furnace body Real-time concentration and gas valve opening are combined to determine the real-time operation load of the gas furnace body, and load-optimal target is established The concentration curve is matched with the optimal target corresponding to the real-time operation load Concentration according to Real-time concentration and the optimal target And the rotating speed of the smoke exhaust fan is dynamically adjusted according to the comparison result of the concentration. The invention solves the problems that in the existing gas furnace control scheme, the smoke exhaust fan rotating speed control mode based on a single threshold value can only adapt to a single gas furnace load working point and is difficult to cope with the parameter dynamic change caused by the complex fluctuation of the gas furnace load.

Inventors

LI FEIHANG
HUANG ZHICHENG

Assignees

宜所(广东)智能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (8)

1. The gas furnace control method suitable for the multi-load working condition is characterized in that the method comprises the following steps: step S1, collecting real-time opening of a gas valve and smoke generated in the running process of a gas furnace body Real-time concentration; step S2, determining the real-time operation load of the gas furnace body according to the real-time opening of the gas valve; Step S3, establishing a load-optimal target A concentration profile; Step S4, according to the load-optimal target Searching and acquiring an optimal target corresponding to the real-time operation load of the gas furnace body by using a concentration curve Concentration; Step S5, the smoke generated in the running process of the gas furnace body is contained in Optimal target with real-time concentration corresponding to real-time operation load of gas furnace body The concentration is compared, and the rotating speed of the smoke exhaust fan is dynamically regulated according to the comparison result, so that the smoke generated in the operation process of the gas furnace body is in The real-time concentration approaches to the optimal target corresponding to the real-time running load of the gas furnace body Concentration.
2. The method for controlling a gas furnace suitable for multiple load conditions according to claim 1, wherein in step S2, the method specifically comprises the following substeps: S21, obtaining rated load of a gas furnace body; Step S22, according to the rated load of the gas furnace body and the real-time opening of the gas valve, calculating to obtain the real-time operation load of the gas furnace body, wherein the specific calculation formula is as follows: ; Wherein, the Representing the real-time operation load of the gas furnace body; indicating the rated load of the gas furnace body; Indicating the real-time opening of the gas valve.
3. A gas furnace control method suitable for multiple load conditions according to claim 1, wherein in step S3, load is the optimal target The specific mathematical expression of the concentration curve is as follows: ; wherein y represents an optimal target Concentration, x represents the operating load of the burner body.
4. The method for controlling a gas furnace under multiple load conditions according to claim 1, wherein in step S5, the method comprises the following steps: step S51, calculating the smoke generated in the running process of the gas furnace body Optimal target with real-time concentration corresponding to real-time operation load of gas furnace body A deviation value d between the concentrations; step S52, adjusting the rotation speed of the corresponding smoke exhaust fan according to the deviation value d; When d is larger than a first preset threshold value, the rotating speed of the smoke exhaust fan is adjusted to 200rpm/min, when d is larger than a second preset threshold value and smaller than or equal to the first preset threshold value, the rotating speed of the smoke exhaust fan is adjusted to 100rpm/min, when d is larger than a third preset threshold value and smaller than or equal to the second preset threshold value, the rotating speed of the smoke exhaust fan is adjusted to 50rpm/min, and when d is smaller than a fourth preset threshold value, the current rotating speed of the smoke exhaust fan is kept unchanged.
5. A gas furnace control system suitable for multiple load conditions, using a gas furnace control method suitable for multiple load conditions according to any one of claims 1-4, characterized in that the system comprises: The acquisition module is used for acquiring the real-time opening of the gas valve and the smoke generated in the operation process of the gas furnace body Real-time concentration; the determining module is used for determining the real-time operation load of the gas furnace body according to the real-time opening of the gas valve; A building module for building load-optimal targets A concentration profile; an acquisition module for optimizing the target according to the load Searching and acquiring an optimal target corresponding to the real-time operation load of the gas furnace body by using a concentration curve Concentration; The comparison module is used for adding smoke generated in the operation process of the gas furnace body Optimal target with real-time concentration corresponding to real-time operation load of gas furnace body Comparing the concentrations; The adjusting module is used for dynamically adjusting the rotating speed of the smoke exhaust fan according to the comparison result so as to enable the smoke generated in the operation process of the gas furnace body to be in The real-time concentration approaches to the optimal target corresponding to the real-time running load of the gas furnace body Concentration.
6. The gas furnace control system suitable for multiple load conditions according to claim 5, wherein the determining module comprises: The acquisition sub-module is used for acquiring rated load of the gas furnace body; the first calculation sub-module is used for calculating the real-time operation load of the gas furnace body according to the rated load of the gas furnace body and the real-time opening of the gas valve, and the specific calculation formula is as follows: ; Wherein, the Representing the real-time operation load of the gas furnace body; indicating the rated load of the gas furnace body; Indicating the real-time opening of the gas valve.
7. A gas furnace control system suitable for multiple load conditions according to claim 5, wherein in said establishing module, load is an optimal target The specific mathematical expression of the concentration curve is as follows: ; wherein y represents an optimal target Concentration, x represents the operating load of the burner body.
8. The gas furnace control system suitable for multiple load conditions according to claim 5, wherein the comparison module comprises: a second calculation sub-module for calculating the smoke generated in the operation process of the gas furnace body Optimal target with real-time concentration corresponding to real-time operation load of gas furnace body A deviation value d between the concentrations; The adjustment module includes: the first adjusting sub-module is used for adjusting the rotating speed of the smoke exhaust fan to 200rpm/min when d is larger than a first preset threshold value; The second adjusting sub-module is used for adjusting the rotating speed of the smoke exhaust fan to 100rpm/min when d is larger than a second preset threshold value and smaller than or equal to the first preset threshold value; The third adjusting sub-module is used for adjusting the rotating speed of the smoke exhaust fan to 50rpm/min when d is larger than a third preset threshold value and smaller than or equal to a second preset threshold value; And the fourth adjusting sub-module is used for keeping the current rotating speed of the smoke exhaust fan unchanged when d is smaller than a fourth preset threshold value.

Description

Gas furnace control method and system suitable for multiple load working conditions Technical Field The invention relates to the technical field of gas furnace control, in particular to a gas furnace control method and a gas furnace control system suitable for multiple load working conditions. Background In the prior gas furnace control scheme, the gas in the gas fume during the operation of the gas furnace is usually detected in real timeConcentration, and then the real-time concentration is compared with a preset valueAnd comparing the concentration threshold values, and finally adjusting the rotating speed of a smoke exhaust fan of the gas furnace according to the comparison result. However, the smoke exhaust fan rotating speed control mode based on the single threshold value can only adapt to a single gas furnace load working condition point, is difficult to cope with parameter dynamic changes caused by complex fluctuation of the gas furnace load, and cannot realize accurate adaptation and stable control of a gas furnace full-load interval. Disclosure of Invention Aiming at the defects, the invention provides a gas furnace control method and a gas furnace control system suitable for multiple load working conditions, and aims to solve the problems that in the existing gas furnace control scheme, a smoke exhaust fan rotating speed control mode based on a single threshold value can only be adapted to a single gas furnace load working condition point, and the dynamic change of parameters caused by complex fluctuation of the gas furnace load is difficult to deal with. To achieve the aim, the invention adopts the following technical scheme: The gas furnace comprises a gas furnace body and a smoke exhaust fan, wherein the gas furnace body comprises a gas valve, and the method comprises the following steps: step S1, collecting real-time opening of a gas valve and smoke generated in the running process of a gas furnace body Real-time concentration; step S2, determining the real-time operation load of the gas furnace body according to the real-time opening of the gas valve; Step S3, establishing a load-optimal target A concentration profile; Step S4, according to the load-optimal target Searching and acquiring an optimal target corresponding to the real-time operation load of the gas furnace body by using a concentration curveConcentration; Step S5, the smoke generated in the running process of the gas furnace body is contained in Optimal target with real-time concentration corresponding to real-time operation load of gas furnace bodyThe concentration is compared, and the rotating speed of the smoke exhaust fan is dynamically regulated according to the comparison result, so that the smoke generated in the operation process of the gas furnace body is inThe real-time concentration approaches to the optimal target corresponding to the real-time running load of the gas furnace bodyConcentration. Preferably, in step S2, the following substeps are specifically included: S21, obtaining rated load of a gas furnace body; Step S22, according to the rated load of the gas furnace body and the real-time opening of the gas valve, calculating to obtain the real-time operation load of the gas furnace body, wherein the specific calculation formula is as follows: ; Wherein, the Representing the real-time operation load of the gas furnace body; indicating the rated load of the gas furnace body; Indicating the real-time opening of the gas valve. Preferably, in step S3, the load is an optimal targetThe specific mathematical expression of the concentration curve is as follows: ; wherein y represents an optimal target Concentration, x represents the operating load of the burner body. Preferably, in step S5, the following substeps are specifically included: step S51, calculating the smoke generated in the running process of the gas furnace body Optimal target with real-time concentration corresponding to real-time operation load of gas furnace bodyA deviation value d between the concentrations; step S52, adjusting the rotation speed of the corresponding smoke exhaust fan according to the deviation value d; When d is larger than a first preset threshold value, the rotating speed of the smoke exhaust fan is adjusted to 200rpm/min, when d is larger than a second preset threshold value and smaller than or equal to the first preset threshold value, the rotating speed of the smoke exhaust fan is adjusted to 100rpm/min, when d is larger than a third preset threshold value and smaller than or equal to the second preset threshold value, the rotating speed of the smoke exhaust fan is adjusted to 50rpm/min, and when d is smaller than a fourth preset threshold value, the current rotating speed of the smoke exhaust fan is kept unchanged. Another aspect of the present application provides a gas furnace control system adapted for multiple load conditions, said system comprising: The acquisition module is used for acquiring the real-time opening of t