Method and system for regulating and controlling nitrogen flow of backflow furnace based on MQTT protocol

Abstract

This invention discloses a nitrogen flow rate regulation and control method for a reflow oven based on the MQTT protocol. The method includes receiving a product switching production plan notification from a digital production management system; searching for nitrogen regulation and control information for the product to be produced in a web server, the nitrogen regulation and control information including a preset nitrogen usage configuration and production line configuration for the product to be produced; sending the nitrogen regulation and control information to an MQTT server; and receiving nitrogen regulation feedback information from the MQTT server, the feedback information being feedback from a flow detection and control terminal associated with the production line configuration after adjusting the corresponding flow control valve based on the preset nitrogen usage configuration. The flow detection and control terminal communicates with the MQTT server via the MQTT protocol. This invention, by associating with the production plan of the digital production management system, sets the nitrogen intake requirement and corresponding production line for each product being produced, and automatically adjusts the nitrogen intake when the production line switches to produce a new product.

Description

Technical Field

[0001] This invention relates to the field of electronic component assembly technology, and in particular to a method and system for regulating and controlling nitrogen flow in a reflow oven based on the MQTT protocol. Background Technology

[0002] Reflow ovens play a crucial role in electronic assembly. Their primary function is to melt solder paste through heating, thereby soldering components to circuit boards. Ensuring an oxygen-free environment during soldering effectively prevents solder paste oxidation, component oxidation, and cold solder joints. Therefore, many reflow oven manufacturers introduce nitrogen into the oven to maintain an ideal atmosphere during soldering. In existing reflow ovens, to maintain stable soldering results, the nitrogen intake is kept constant at its maximum value and cannot be adjusted in real time according to actual conditions. Furthermore, different products have different oxygen content requirements within the oven, and the nitrogen intake cannot be adjusted accordingly. Keeping the nitrogen intake constant at its maximum value results in nitrogen waste, while manual adjustment is cumbersome. Although some methods exist on the market that automatically adjust the nitrogen intake based on the oven's oxygen content, these are not integrated with the product production plan of a digital production control system, and remote direct adjustment of the nitrogen intake is not possible.

[0003] Therefore, a new solution is needed. Summary of the Invention

[0004] The main objective of this invention is to address the problem that the nitrogen inlet flow rate in existing reflow ovens cannot be adjusted in real time according to actual needs, and to provide a nitrogen flow rate regulation and control method and system for reflow ovens based on the MQTT protocol.

[0005] To achieve the above objectives, this invention provides a method for regulating and controlling nitrogen flow in a reflux furnace based on the MQTT protocol, used on a web server, comprising the following steps:

[0006] Receive notifications from the digital production management system regarding the switching of product production plans;

[0007] According to the notification of switching product production plan, the nitrogen regulation control information of the product to be produced is retrieved in the Web server, wherein the nitrogen regulation control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced;

[0008] Send the nitrogen regulation and control information to the MQTT server;

[0009] The system receives nitrogen regulation feedback information from the MQTT server. The nitrogen regulation feedback information is feedback information from the flow detection and control terminal associated with the production line configuration after adjusting the corresponding flow control valve based on the preset nitrogen usage configuration. The flow detection and control terminal communicates with the MQTT server via the MQTT protocol.

[0010] In the MQTT protocol-based nitrogen flow regulation and control method for reflow ovens provided by this invention, the method further includes the following step before receiving a notification from the digital production management system regarding a change in product production plan:

[0011] Configure a production line information database, which includes nitrogen flow detection and control terminal information associated with each production line and nitrogen consumption information for the products produced by each production line.

[0012] In the MQTT protocol-based nitrogen flow regulation and control method for reflux furnace provided by the present invention, when no product to be produced is found in the production line information database according to the product switching production plan notification, the method further includes setting the nitrogen regulation and control information for the product to be produced based on production requirements.

[0013] Furthermore, to achieve the above objectives, the present invention also provides a nitrogen flow regulation and control device for a reflux furnace based on the MQTT protocol, comprising:

[0014] The production plan receiving module is used to receive product switching production plan notifications from the digital production management and control system;

[0015] The control information lookup module is used to look up the nitrogen regulation control information of the product to be produced in the Web server according to the product switching production plan notification. The nitrogen regulation control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced.

[0016] The control information sending module is used to send the nitrogen regulation control information to the MQTT server;

[0017] The feedback information receiving module is used to receive nitrogen regulation feedback information from the MQTT server. The nitrogen regulation feedback information is feedback information after the flow detection and control terminal associated with the production line configuration adjusts the corresponding flow control valve based on the preset nitrogen usage configuration. The flow detection and control terminal communicates with the MQTT server via the MQTT protocol.

[0018] The reflux furnace nitrogen flow regulation and control device based on the MQTT protocol provided by the present invention also includes an information configuration module for configuring a production line information database. The production line information database includes nitrogen flow detection and control terminal information associated with each production line and nitrogen consumption information of the products produced by each production line.

[0019] The reflux furnace nitrogen flow regulation and control device based on the MQTT protocol provided by the present invention also includes a remote setting module, which is used to set the nitrogen regulation and control information for the product to be produced based on production needs when the product to be produced is not found in the production line information database according to the product switching production plan notification.

[0020] The present invention also provides a storage medium storing one or more programs, which can be executed by one or more processors to implement the steps of the MQTT protocol-based nitrogen flow regulation and control method for reflux furnace as described above.

[0021] This invention also provides a nitrogen flow regulation and control system for a reflux furnace based on the MQTT protocol, including a web server, an MQTT server, and multiple nitrogen flow detection and control terminals. The web server is connected to the digital production management and control system and the MQTT server via the HTTP protocol, and the MQTT server is connected to the multiple nitrogen flow detection and control terminals via the MQTT protocol.

[0022] When the web server receives a notification from the digital production management system to switch product production plans, it searches for nitrogen regulation control information of the product to be produced based on the notification. The nitrogen regulation control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced. The web server then sends the nitrogen regulation control information to the MQTT server.

[0023] The MQTT server is used to send the preset nitrogen usage configuration to the flow detection and control terminal associated with the production line configuration;

[0024] The flow detection and control terminal is used to adjust the flow control valve based on the preset nitrogen usage configuration when it hears an instruction from the MQTT server.

[0025] In the MQTT protocol-based nitrogen flow regulation and control system for reflux furnaces provided by this invention, the Web server is also used to configure a production line information database, which includes nitrogen flow detection and control terminal information associated with each production line and nitrogen consumption information of the products produced by each production line; the Web server is also used to set the nitrogen regulation and control information for the product to be produced based on production requirements when no product to be produced is found in the production line information database according to the product switching production plan notification.

[0026] This invention also provides a method for regulating and controlling nitrogen flow in a reflux furnace based on the MQTT protocol, used in a flow detection and control terminal, comprising the following steps:

[0027] The system receives a message topic from an MQTT server, wherein the flow detection and control terminal communicates with the MQTT server via the MQTT protocol, and the message topic includes nitrogen regulation and control information. The nitrogen regulation and control information is obtained by the Web server from the Web server based on the product switching production plan notification from the digital production management and control system and sent to the MQTT server. The nitrogen regulation and control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced.

[0028] Based on the preset nitrogen usage, the corresponding flow control valve is adjusted; and

[0029] Nitrogen regulation feedback information is generated and sent to the web server via the MQTT server.

[0030] The MQTT-based nitrogen flow regulation control system and method for reflow ovens provided by this invention have the following beneficial effects: When production plans are switched or production tasks are changed, the system can respond quickly, automatically acquiring the nitrogen flow requirements of new products and adjusting the flow settings. Switching production plans often requires adjusting production conditions; with this invention, adjustments during the production process can be completed in a short time, thereby reducing production line downtime and improving production efficiency. Different products have different nitrogen flow requirements, and traditional manual control often requires a lot of time and effort to adjust; however, through the configuration of the production line information database, the system can support rapid switching of diverse products, automatically adjusting flow settings and avoiding errors caused by human operation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0032] Figure 1 The diagram shown is a schematic diagram of the nitrogen flow regulation and control system for a reflux furnace based on the MQTT protocol provided in Embodiment 1 of the present invention.

[0033] Figure 2 The diagram shows a flowchart of a nitrogen flow regulation and control method for a reflux furnace based on the MQTT protocol, provided in Embodiment 2 of the present invention.

[0034] Figure 3 The flowchart shown is a process for regulating and controlling the nitrogen flow rate of a reflux furnace based on the MQTT protocol, provided in Embodiment 3 of the present invention. Detailed Implementation

[0035] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Typical embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0037] Example 1

[0038] Figure 1 The diagram shown is a schematic of a nitrogen flow regulation and control system for a reflux furnace based on the MQTT protocol, according to an embodiment of the present invention. Figure 1As shown, the MQTT-based nitrogen flow regulation and control system for a reflux furnace provided by this invention includes a Web server 100, an MQTT server 200, and multiple nitrogen flow detection and control terminals 300. The Web server is connected to the digital production management system 400 and the MQTT server via the HTTP protocol, and the MQTT server is connected to the multiple nitrogen flow detection and control terminals via the MQTT protocol. Each nitrogen flow detection and control terminal 300 includes a flow sensor 310, a flow control valve 320, and a communication module 330. The flow sensor is responsible for real-time acquisition of the nitrogen intake volume and sending the flow value to the MQTT server via the communication module and the MQTT protocol. The flow control valve is used to regulate the nitrogen intake volume. The MQTT server implements the MQTT protocol and communicates with the nitrogen flow detection and control terminals via the MQTT protocol. The Web server is responsible for displaying the real-time nitrogen intake volume, configuring the nitrogen intake requirements for different products, receiving product production plan switching notifications from the digital production management system, and remotely controlling and regulating the nitrogen intake volume.

[0039] Specifically, in this embodiment, the Web server is also used to configure a production line information database. This database includes nitrogen flow detection and control terminal information associated with each production line and nitrogen usage information for the products produced by each production line. Upon receiving a notification from the digital production management system to switch product production plans, the system searches for nitrogen regulation control information for the product to be produced based on the notification. This nitrogen regulation control information includes a preset nitrogen usage configuration and production line configuration for the product to be produced. The system then sends this information to the MQTT server. If the product to be produced is not found in the production line information database according to the notification, the system sets the nitrogen regulation control information for the product to be produced based on production requirements. Thus, as the production plan changes, the system can automatically adjust the nitrogen flow rate without manual intervention. For example, when switching to a product requiring a different nitrogen flow rate, the system automatically retrieves the corresponding flow configuration from the production line information database and adjusts the nitrogen flow rate of the reflow oven in real time.

[0040] In this embodiment, a production line information database is configured on the Web server. This database contains information about each production line, such as the nitrogen flow detection and control terminal associated with each production line, and the nitrogen flow data required for different products. When the production plan of the digital production management system changes, the digital production management system sends a notification to the Web server to switch the production plan. This notification includes the name of the product to be produced. The Web server searches the production line information database based on the name of the product to be produced in the notification to obtain the preset nitrogen usage configuration for producing that product and the production line configuration to which the product belongs, i.e., which production line the product is produced on and the identifier of the nitrogen flow detection and control terminal corresponding to that production line.

[0041] Specifically, in this embodiment, the MQTT server is used to send the preset nitrogen usage configuration to the flow detection and control terminal associated with the production line configuration. Using the MQTT protocol enables the system to have extremely high real-time performance. MQTT is a lightweight message publish / subscribe protocol, particularly suitable for real-time data transmission in industrial automation systems. MQTT can ensure timely message transmission even under poor network conditions, ensuring that nitrogen flow adjustment commands can be transmitted quickly, and ensuring that adjustments at every stage of the production process can be completed in the shortest possible time. The MQTT protocol has low bandwidth consumption and high transmission efficiency, making it suitable for scenarios where control commands and feedback data need to be frequently exchanged. This real-time performance and efficiency directly help the production line quickly adapt to changes in production tasks, eliminating the need to wait for long command responses, reducing downtime, and improving overall production efficiency.

[0042] Specifically, in this embodiment, the flow detection and control terminal is used to adjust the flow control valve based on the preset nitrogen usage configuration when it receives instructions from the MQTT server. Thus, the nitrogen flow rate of each production line can be precisely adjusted according to specific production needs. Whether for mass production or small-batch production, the system can adjust the nitrogen flow rate according to process requirements, avoiding excessive nitrogen waste. This not only helps enterprises reduce operating costs but also aligns with the high level of environmental protection requirements in modern industry.

[0043] The nitrogen flow regulation and control system for reflux furnaces provided by this invention, based on the MQTT protocol, can respond quickly when production plans are switched or production tasks are changed. The system automatically acquires the nitrogen flow requirements of new products and adjusts the flow settings accordingly. Switching production plans often requires adjustments to production conditions; this invention allows these adjustments to be completed quickly, reducing production line downtime and improving production efficiency. Different products have different nitrogen flow requirements, and traditional manual control often requires significant time and effort for adjustment. However, through the configuration of a production line information database, the system can support rapid switching between diverse products, automatically adjusting flow settings and avoiding errors caused by human operation.

[0044] Example 2

[0045] Reference Figure 2 This invention provides a method for regulating and controlling nitrogen flow in a reflux furnace based on the MQTT protocol, used on a web server. For example... Figure 2 As shown, the method includes the following steps:

[0046] Step S210: Configure the production line information database, which includes nitrogen flow detection and control terminal information associated with each production line and nitrogen consumption information of the products produced by each production line.

[0047] Specifically, a production line information database is configured on the web server. This database contains information about each production line, such as the nitrogen flow detection and control terminal associated with each line, and the nitrogen flow data required for different products. The nitrogen consumption of each production line will vary depending on the specific product it produces. After configuration, the system can retrieve relevant information in real time for subsequent control.

[0048] Step S220: Receive a notification from the digital production control system regarding the switching of the product production plan;

[0049] Specifically, in this embodiment, the Web server and the digital production control system communicate via the HTTP protocol. When the production plan of the digital production control system changes, for example, when the product produced on production line 001 changes from product A to product B, the digital production control system will send a product switching production plan notification to the Web server, which includes the name of the product to be produced.

[0050] Step S230: According to the product production plan notification, search the nitrogen regulation control information of the product to be produced in the Web server, wherein the nitrogen regulation control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced;

[0051] Specifically, in this embodiment, the Web server searches the production line information database based on the name of the product to be produced contained in the product production plan notification to obtain the preset nitrogen usage configuration for producing the product and the production line configuration to which the product to be produced belongs, that is, on which production line the product is produced and the identifier of the nitrogen flow detection and control terminal corresponding to the production line.

[0052] Step S240: Send the nitrogen regulation and control information to the MQTT server;

[0053] Specifically, in this embodiment, the web server sends nitrogen regulation and control information, including the preset nitrogen usage configuration for the product to be produced and the production line configuration, to the MQTT server via the HTTP protocol. This allows the nitrogen regulation and control information to be promptly distributed to the corresponding nitrogen flow detection and control terminal via the MQTT protocol. The MQTT protocol is a lightweight protocol that transmits small amounts of data, consumes minimal bandwidth and memory resources, supports message acknowledgment mechanisms to ensure messages are not lost during transmission, and can still receive messages from the server even after a terminal disconnects and reconnects.

[0054] Step S250: Receive nitrogen regulation feedback information from the MQTT server, wherein the nitrogen regulation feedback information is feedback information after the flow detection and control terminal associated with the production line configuration adjusts the corresponding flow control valve based on the preset nitrogen usage configuration, and the flow detection and control terminal communicates with the MQTT server via the MQTT protocol.

[0055] Specifically, in this embodiment, the MQTT server sends nitrogen regulation control information from the web server to the corresponding flow detection and control terminal via the MQTT protocol. Upon receiving the instruction, the flow detection and control terminal adjusts its configuration according to the nitrogen regulation control information and returns feedback information to the web server via the MQTT server.

[0056] Specifically, in this embodiment, an MQTT server is used as a message distribution bridge between the web server and multiple nitrogen flow detection and control terminals. Since the application layer uses the MQTT protocol, each nitrogen flow control terminal listens to a different message topic, only listening to its own. For example, if the identifier of nitrogen flow control terminal 1 is 05600000000001, then the message topic it listens to is / 05600000000001 / down. This ensures that each nitrogen flow detection and control terminal only receives instructions sent to it by the server.

[0057] This invention controls the nitrogen intake volume via a network, with preset nitrogen intake volumes stored on the server. When adjustments to the nitrogen flow rate are needed, the server sends the nitrogen intake volume to the terminal via the network. The terminal connects to the network via Wi-Fi or Ethernet cable, and the application layer uses the MQTT protocol to communicate with the server. This enables precise adjustment of the nitrogen flow rate during production, allowing for automatic response to changes in production plans and dynamic adjustment of the nitrogen flow rate. This ensures stable production line operation, reduces resource waste, and improves production efficiency. This method not only optimizes the production process but also provides reliable technical support for intelligent manufacturing and industrial automation.

[0058] Furthermore, in one embodiment of the present invention, when the product to be produced is not found in the production line information database according to the product switching production plan notification, the system further includes setting the nitrogen regulation control information for the product to be produced based on production needs. Specifically, when the production plan is temporarily adjusted, requiring the production of a product that is not preset (e.g., product C), and the relevant parameters of the product (e.g., nitrogen intake volume) are not in the information database, the system will make corresponding adjustments based on the actual needs of the product (e.g., a nitrogen intake volume of 700 L / min). At this time, the system will issue the configuration through a web interface: on the web interface, the user can select product C and input the required nitrogen intake volume (e.g., 700 L / min) and production line configuration, and then the system will transmit this configuration information to the relevant terminal via the network. After receiving the configuration, the terminal will automatically adjust the control valve to ensure that the nitrogen intake volume during the production process meets the requirements, thereby ensuring smooth production. Thus, through remote control of nitrogen intake volume adjustment, it is possible to ensure that product production is not affected by sudden demands, thereby improving production efficiency and accuracy. The remote control function not only facilitates geographically dispersed management by operators, but also enables timely responses during the production process, ensuring the continuity and stability of production.

[0059] This invention, by integrating with a digital production control system, automates the management of nitrogen demand during production and enables flexible adjustments to production plans and automatic control of nitrogen intake. The invention presets specific nitrogen intake requirements for each product during production, along with corresponding production line information (such as nitrogen intake volume, flow rate, and intake time), within the digital production control system and links this information to the production plan. This allows the system to automatically adjust the nitrogen intake based on the preset requirements when producing a particular product, ensuring that the production process meets technical requirements. Therefore, when the production plan is running normally and the production line switches to a different product, the system automatically adjusts the nitrogen intake according to the new production task. For example, when the production line switches from producing product A to product B, the system automatically adjusts based on the nitrogen intake requirements of product B. This process requires no manual intervention, improving the automation and accuracy of production. If a temporary product switch is needed outside of the production plan, traditional methods may require manual adjustments or even production interruptions. This invention provides the ability to remotely adjust the nitrogen intake. Specifically, in the event of an unplanned product switch (e.g., a temporary need to produce a new product or adjustments to the production plan based on changes in customer demand), users can remotely set new nitrogen requirements via a web interface, which are then transmitted to the production terminal for automatic adjustment. Thus, the system can respond to changes in production demand in real time, quickly adjusting production parameters regardless of whether the switch is planned or unplanned, avoiding delays caused by manual operation.

[0060] This invention significantly improves the flexibility, automation, and efficiency of production lines by closely integrating nitrogen demand with production planning and enabling automatic adjustment and remote control. Especially when switching production products unplanned, it can quickly and accurately adjust the nitrogen intake to ensure uninterrupted production, reducing the complexity of manual operation and optimizing the production process.

[0061] Example 3

[0062] A nitrogen flow rate regulation and control device for a reflux furnace based on the MQTT protocol, characterized in that it includes:

[0063] The production plan receiving module is used to receive product switching production plan notifications from the digital production management and control system;

[0064] The control information lookup module is used to look up the nitrogen regulation control information of the product to be produced in the Web server according to the product switching production plan notification. The nitrogen regulation control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced.

[0065] The control information sending module is used to send the nitrogen regulation control information to the MQTT server;

[0066] The feedback information receiving module is used to receive nitrogen regulation feedback information from the MQTT server. The nitrogen regulation feedback information is feedback information after the flow detection and control terminal associated with the production line configuration adjusts the corresponding flow control valve based on the preset nitrogen usage configuration. The flow detection and control terminal communicates with the MQTT server via the MQTT protocol.

[0067] The information configuration module is used to configure the production line information database, which includes the nitrogen flow detection and control terminal information associated with each production line and the nitrogen consumption information of the products produced by each production line.

[0068] The remote setting module is used to set the nitrogen regulation control information for the product to be produced based on production needs when the product to be produced is not found in the production line information database according to the product switching production plan notification.

[0069] Since the concept of this embodiment is the same as that of Embodiment 2, the details can be referred to Embodiment 2, and will not be repeated here.

[0070] Example 4

[0071] like Figure 3 As shown, the present invention also provides a nitrogen flow regulation and control method for a reflux furnace based on the MQTT protocol, used in a flow detection and control terminal, comprising the following steps:

[0072] Step S310: Receive a message topic from the MQTT server, wherein the flow detection and control terminal communicates with the MQTT server via the MQTT protocol, the message topic includes nitrogen regulation control information, the nitrogen regulation control information is obtained by the Web server from the Web server according to the product switching production plan notification from the digital production management and control system and sent to the MQTT server, the nitrogen regulation control information includes the preset nitrogen usage configuration of the product to be produced and the production line configuration;

[0073] Step S320: Configure and adjust the corresponding flow control valve based on the preset nitrogen usage; and

[0074] Step S330: Generate nitrogen regulation feedback information and send it to the Web server via the MQTT server.

[0075] This embodiment is based on the system implementation of Embodiment 1. Therefore, for details of this embodiment, please refer to Embodiment 1. It will not be repeated here.

[0076] Example 5

[0077] This invention also provides a computer storage medium storing a computer program. When the computer program is executed, it can implement the nitrogen flow regulation and control method for a reflux furnace based on the MQTT protocol provided in Embodiment 2, or implement the nitrogen flow regulation and control method for a reflux furnace based on the MQTT protocol provided in Embodiment 4.

[0078] The computer-readable storage medium may include various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM) > random access memory (RAM), magnetic disks, or optical disks.

[0079] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0080] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0081] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0082] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A method for regulating and controlling nitrogen flow in a reflux furnace based on the MQTT protocol, used on a web server, characterized in that, Includes the following steps: Receive notifications from the digital production management system regarding the switching of product production plans; According to the notification of switching product production plan, the nitrogen regulation control information of the product to be produced is retrieved in the Web server, wherein the nitrogen regulation control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced; Send the nitrogen regulation and control information to the MQTT server; The system receives nitrogen regulation feedback information from the MQTT server. The nitrogen regulation feedback information is feedback information from the flow detection and control terminal associated with the production line configuration after adjusting the corresponding flow control valve based on the preset nitrogen usage configuration. The flow detection and control terminal communicates with the MQTT server via the MQTT protocol.

2. The nitrogen flow rate regulation and control method for a reflux furnace based on the MQTT protocol as described in claim 1, characterized in that, Before receiving the notification of a changeover product production plan from the digital production management system, the following steps are also included: Configure a production line information database, which includes nitrogen flow detection and control terminal information associated with each production line and nitrogen consumption information for the products produced by each production line.

3. The nitrogen flow rate regulation and control method for a reflux furnace based on the MQTT protocol as described in claim 2, characterized in that, When the product to be produced is not found in the production line information database according to the product switching production plan notification, the method also includes setting the nitrogen regulation control information for the product to be produced based on production needs.

4. A nitrogen flow rate regulation and control device for a reflux furnace based on the MQTT protocol, characterized in that, include: The production plan receiving module is used to receive product switching production plan notifications from the digital production management and control system; The control information lookup module is used to look up the nitrogen regulation control information of the product to be produced in the Web server according to the product switching production plan notification. The nitrogen regulation control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced. The control information sending module is used to send the nitrogen regulation control information to the MQTT server; The feedback information receiving module is used to receive nitrogen regulation feedback information from the MQTT server. The nitrogen regulation feedback information is feedback information after the flow detection and control terminal associated with the production line configuration adjusts the corresponding flow control valve based on the preset nitrogen usage configuration. The flow detection and control terminal communicates with the MQTT server via the MQTT protocol.

5. The reflux furnace nitrogen flow regulation and control device based on the MQTT protocol as described in claim 4, characterized in that, It also includes an information configuration module for configuring the production line information database, which includes nitrogen flow detection and control terminal information associated with each production line and nitrogen usage information for the products produced by each production line.

6. The reflux furnace nitrogen flow regulation and control system based on the MQTT protocol as described in claim 5, characterized in that, It also includes a remote setting module, which is used to set the nitrogen regulation control information for the product to be produced based on production needs when the product to be produced is not found in the production line information database according to the product switching production plan notification.

7. A storage medium, characterized in that, The storage medium stores one or more programs, which can be executed by one or more processors to implement the steps of the MQTT protocol-based nitrogen flow regulation and control method for reflux furnaces according to any one of claims 1 to 3.

8. A nitrogen flow regulation and control system for a reflux furnace based on the MQTT protocol, characterized in that, The system includes a web server, an MQTT server, and multiple nitrogen flow detection and control terminals. The web server is connected to the digital production management and control system and the MQTT server via the HTTP protocol. The MQTT server is connected to the multiple nitrogen flow detection and control terminals via the MQTT protocol. When the web server receives a notification from the digital production management system to switch product production plans, it searches for nitrogen regulation control information of the product to be produced based on the notification. The nitrogen regulation control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced. The web server then sends the nitrogen regulation control information to the MQTT server. The MQTT server is used to send the preset nitrogen usage configuration to the flow detection and control terminal associated with the production line configuration; The flow detection and control terminal is used to adjust the flow control valve based on the preset nitrogen usage configuration when it hears an instruction from the MQTT server.

9. The reflux furnace nitrogen flow regulation and control system based on the MQTT protocol as described in claim 8, characterized in that, The web server is also used to configure the production line information database, which includes nitrogen flow detection and control terminal information associated with each production line and nitrogen usage information of the products produced by each production line. The web server is also used to set the nitrogen regulation control information for the product to be produced based on production needs when no product to be produced is found in the production line information database according to the product switching production plan notification.

10. A method for regulating and controlling nitrogen flow in a reflux furnace based on the MQTT protocol, used in a flow detection and control terminal, characterized in that, Includes the following steps: The system receives a message topic from an MQTT server, wherein the flow detection and control terminal communicates with the MQTT server via the MQTT protocol, and the message topic includes nitrogen regulation and control information. The nitrogen regulation and control information is obtained by the Web server from the Web server based on the product switching production plan notification from the digital production management and control system and sent to the MQTT server. The nitrogen regulation and control information includes the preset nitrogen usage configuration and production line configuration of the product to be produced. Based on the preset nitrogen usage, the corresponding flow control valve is adjusted; and Nitrogen regulation feedback information is generated and sent to the web server via the MQTT server.

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