Program logic function detection device of lithium bromide absorption type refrigerating unit control system
By designing a program logic function detection device for the lithium bromide absorption refrigeration unit control system including a main controller, a PT100 thermal resistance signal generator and a touch screen, the problem of inefficiency of traditional testing methods is solved, efficient automatic detection is achieved, and testing efficiency and accuracy are improved.
Patent Information
- Application Number
- CN202421097038.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The traditional lithium bromide absorption refrigeration unit control system program logic function testing method relies on manual operation, the test process is cumbersome and inefficient, and cannot meet the needs of modern production.
A program logic function detection device for lithium bromide absorption refrigeration unit control system is designed, including a main controller, a PT100 thermal resistance signal generator and a touch screen, and automatic detection is achieved through a programmable controller PLC. The device simulates various external conditions, detects whether the control system can provide corresponding action feedback, and determines whether the program logic function meets the requirements.
It realizes comprehensive and efficient automatic detection of the logic functions of the control system program, reduces manual testing time, improves testing efficiency, reduces testing costs, optimizes testing steps, and improves the accuracy and reliability of the test.
Smart Images
Figure CN222578561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium bromide absorption refrigeration units, in particular to a program logic function automatic detection device for a lithium bromide absorption refrigeration unit control system. Background Art
[0002] As an efficient and environmentally friendly refrigeration equipment, lithium bromide absorption refrigeration unit has a wide range of applications in the refrigeration field. However, the stability and reliability of the program logic function of its control system are crucial to the normal operation of the unit. Traditional control system program logic function testing methods often rely on manual operation, and the testing process is cumbersome and inefficient, which cannot meet the needs of modern production. Therefore, the development of a device that can automatically detect the program logic function of the lithium bromide absorption refrigeration unit control system is of great significance for improving test efficiency and reducing test costs. Utility Model Content
[0003] In order to overcome the deficiencies in the above-mentioned prior art, the utility model provides a program logic function detection device for a lithium bromide absorption refrigeration unit control system, which can realize comprehensive and efficient automatic detection of the program logic function of the control system.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A program logic function detection device for a lithium bromide absorption refrigeration unit control system, comprising:
[0006] A main controller for controlling the operation and data processing of the entire detection device, which is connected to a touch screen for displaying parameter changes during the test and operating the start and end of the test of the automatic detection device;
[0007] The thermal resistance signal generator is used to simulate the thermal resistance temperature signal required for the operation of the lithium bromide system and send the simulated signal to the main controller, which is connected to the main controller.
[0008] Furthermore, the main controller is connected to the lithium bromide absorption refrigeration unit control system through a circuit.
[0009] Furthermore, the main controller adopts a programmable controller PLC.
[0010] Furthermore, the programmable controller PLC includes a digital quantity and analog quantity expansion unit, a logic operation unit and a communication unit. The digital quantity and analog quantity expansion unit is connected to the lithium bromide absorption refrigeration unit control system, and the communication unit is respectively connected to the lithium bromide absorption refrigeration unit control system, the thermal resistance signal generator and the touch screen.
[0011] Furthermore, the communication unit is connected to the thermal resistance signal generator in a 485 bus circuit.
[0012] Furthermore, the communication unit is connected to the lithium bromide absorption refrigeration unit control system in a 485 bus manner.
[0013] Furthermore, the thermal resistance signal generator is PT100 or PT1000.
[0014] Beneficial effects of the utility model:
[0015] Compared with the prior art, the program logic function detection device of the lithium bromide absorption refrigeration unit control system described in the utility model uses a test system built by a main controller, and uses its own digital quantity and analog quantity expansion unit and a PT100 thermal resistor signal generator to simulate various external conditions required for the operation of the lithium bromide absorption refrigeration unit control system. By determining whether the lithium bromide absorption refrigeration unit control system can make corresponding action feedback under different external conditions, it is determined whether its program logic function meets the requirements. The device aims to reduce manual testing time, improve testing efficiency, optimize testing steps, and realize one-button automatic detection. The utility model has broad application prospects and market potential, and provides strong support for the development of the lithium bromide absorption refrigeration unit technology field. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:
[0017] Figure 1 It is a schematic diagram of the structure of the utility model;
[0018] Figure 2 This is a control logic flow chart of the utility model. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Figure 1-2 The program logic function detection device of the lithium bromide absorption refrigeration unit control system is further explained.
[0020] Example 1
[0021] A program logic function automatic detection device for a lithium bromide absorption refrigeration unit control system includes a main controller, a PT100 thermal resistance signal generator, a touch screen and corresponding circuit connections. The main controller adopts a programmable controller PLC, which is responsible for the control and data processing of the entire automatic detection device. The PT100 thermal resistance signal generator is used to simulate various temperature signals required for the operation of the lithium bromide absorption refrigeration unit control system. The touch screen is used as a human-computer interaction interface to display various information during the test and control the start and end of the test.
[0022] The main controller is connected to the PT100 thermal resistor signal generator circuit to receive and send temperature signals. The main controller is connected to the touch screen circuit to display test information and receive control instructions. In addition, the main controller is also connected to the lithium bromide absorption refrigeration unit control system through the circuit to read and detect data from the lithium bromide absorption refrigeration unit control system.
[0023] The test system built with a high-speed main controller simulates all the external conditions required for the lithium bromide absorption refrigeration unit control system to enter the operating program logic through its own digital and analog expansion units and PT100 thermal resistance signal generator. By adjusting the changes in external conditions (including temperature, pressure, liquid level and other parameters), the operating logic of the lithium bromide absorption refrigeration unit control system under different working conditions can be simulated.
[0024] By testing whether the lithium bromide absorption refrigeration unit control system can make corresponding action feedback under different external conditions, it is judged whether the various program logic function indicators of the lithium bromide absorption refrigeration unit control system meet the requirements. Specifically, when the automatic detection device simulates a certain external condition, the lithium bromide absorption refrigeration unit control system should be able to make corresponding adjustments and controls according to the preset logic. If the lithium bromide absorption refrigeration unit control system can respond correctly and make corresponding action feedback, it means that the indicator meets the requirements; otherwise, it means there is a problem.
[0025] The utility model discloses an automatic detection device for program logic function of a lithium bromide absorption refrigeration unit control system, and aims to automatically test the program logic function of the lithium bromide absorption refrigeration unit control system, reduce the time investment of manual labor in the experimental test of the program logic function of the lithium bromide absorption refrigeration unit control system, improve the efficiency of the program logic function test process of the lithium bromide absorption refrigeration unit control system, and optimize the test steps. The entire test process is automatic, and only needs to connect the automatic detection device to the lithium bromide absorption refrigeration unit control system, and start the automatic detection by one-key operation through the touch screen.
[0026] The utility model realizes the automatic detection of program logic functions of the lithium bromide absorption refrigeration unit control system, greatly improves the test efficiency, and reduces the test cost. It reduces manual participation, reduces the impact of human factors on the test results, improves the accuracy and reliability of the test, simplifies the test steps, optimizes the test process, and makes the test process more convenient and efficient.
[0027] Example 2
[0028] This embodiment is a new embodiment or a supplement to Embodiment 1.
[0029] A program logic function automatic detection device for a lithium bromide absorption refrigeration unit control system includes a main controller, a PT100 thermal resistor signal generator, a touch screen, and corresponding circuit connections to form a complete automatic detection device. The main controller and the PT100 thermal resistor signal generator in the automatic detection device are connected to the lithium bromide absorption refrigeration unit control system through a circuit to realize program logic function detection of the lithium bromide absorption refrigeration unit control system. The main controller is connected to the touch screen; the PT100 thermal resistor signal generator is connected to the main controller. The PT100 thermal resistor signal generator simulates a PT100 thermal resistor signal.
[0030] The main controller adopts a programmable controller PLC, which is used to control the operation and data processing of the entire detection device. The programmable controller PLC includes a digital and analog expansion unit, a logic operation unit and a communication unit. The digital and analog expansion unit is connected to the lithium bromide absorption refrigeration unit control system, and the communication unit is respectively connected to the lithium bromide absorption refrigeration unit control system, a thermal resistor signal generator, and a touch screen. The PT100 thermal resistor signal generator is used to simulate the thermal resistor temperature signal required when the lithium bromide system is running, and send the analog signal to the main controller by communication. The touch screen is used as a human-computer interaction interface to display various information during the test, such as changes in parameters such as temperature, pressure, liquid level, etc., and to operate the start and end test of the automatic detection device.
[0031] The automatic detection device can simulate various external conditions when the lithium bromide absorption refrigeration unit control system is in operation, including but not limited to changes in parameters such as temperature, pressure, and liquid level, so as to simulate the operation of the lithium bromide absorption refrigeration unit control system under different working conditions.
[0032] By testing whether the lithium bromide absorption refrigeration unit control system can make corresponding action feedback under different external conditions, it can be judged whether the various program logic function indicators of the lithium bromide absorption refrigeration unit control system meet the requirements.
[0033] 1. In actual application, the main controller adopts a programmable controller PLC, which is responsible for the control and data processing of the entire automatic detection device. The PT100 thermal resistance signal generator is used to simulate the various temperature signals required for the operation of the lithium bromide absorption refrigeration unit control system. The touch screen is used as a human-computer interaction interface to display various information during the test and control the start and end of the test.
[0034] The communication unit of the main controller is connected to the lithium bromide absorption refrigeration unit control system in 485 bus mode to obtain all data of the lithium bromide absorption refrigeration unit control system.
[0035] The communication unit of the main controller is connected to the PT100 thermal resistor signal generator in a 485 bus circuit. The main controller issues a temperature value command to control the PT100 thermal resistor signal generator to convert the corresponding thermal resistor signal. The thermal resistor signal output end is connected to the lithium bromide absorption refrigeration unit control system to provide the thermal resistor signal required for the operation of the lithium bromide absorption refrigeration unit control system.
[0036] The digital and analog expansion units of the main controller are connected to the lithium bromide absorption refrigeration unit control system to provide the interlocking conditions required for the operation logic functions of the lithium bromide absorption refrigeration unit control system and simulate the operating status of its internal equipment and changing parameters such as pressure and liquid level.
[0037] The digital quantity and analog quantity expansion unit of the main controller is connected to the output signal of the lithium bromide absorption refrigeration unit control system to detect the action feedback made by the lithium bromide absorption refrigeration unit control system.
[0038] 2. When the automatic detection device simulates a certain external condition, the lithium bromide absorption refrigeration unit control system should be able to make corresponding adjustments and controls according to the preset logic. If the lithium bromide absorption refrigeration unit control system can respond correctly and make corresponding action feedback, it means that the indicator meets the requirements; otherwise, it means there is a problem.
[0039] like Figure 2 As shown, according to different program logic functions, the detection process can be divided into parameter detection, startup process detection, operation process detection, and dilution process detection.
[0040] 1). Parameter detection and implementation
[0041] When starting the test, the automatic test device first reads the various parameter values of the lithium bromide absorption refrigeration unit control system. At the same time, the automatic test device is equipped with a parameter comparison module, which has built-in correct parameter standard values for various models. After reading the parameters, the comparison module automatically compares the parameters. If all parameters meet the standards, the automatic test device issues a command to continue testing; if there are parameters that do not meet the standards, the automatic test device issues an error signal and stops the subsequent test process.
[0042] 2). Start-up process detection and implementation
[0043] The automatic detection device is equipped with a start-up condition control module, which can simulate or adjust the external start-up logic conditions of the lithium bromide absorption refrigeration unit control system. When the conditions meet the startup requirements, an external start-up condition is changed and the startup operation is automatically triggered. Subsequently, the automatic detection device records and analyzes the startup action and alarm feedback of the lithium bromide absorption refrigeration unit control system through the action detection module. After each test is completed, the start-up condition control module will reset the external conditions and repeat the above process until all startup items are tested. The touch screen displays the results of each test in real time, which is convenient for the operator to grasp the progress of the test.
[0044] 3). Operation process detection and implementation
[0045] Similar to the startup process detection, the automatic detection device adjusts the external operating logic conditions of the lithium bromide absorption refrigeration unit control system through the operating condition control module. After each condition change, the automatic detection device detects and records the system's operating actions and alarm feedback. After the detection is completed, the condition control module will reset the external conditions to restore the system to its initial state and repeat the detection process until all operating items are detected.
[0046] 4). Dilution process detection and implementation
[0047] In the dilution process detection, the automatic detection device first controls the lithium bromide absorption refrigeration unit control system to enter the running logic state and then performs the shutdown logic operation. Subsequently, the external condition control module simulates different external conditions and detects the corresponding actions and alarm feedback of the lithium bromide absorption refrigeration unit control system during the change from running logic to stop logic. After each detection, the module will reset the external conditions, control the lithium bromide absorption refrigeration unit control system to enter the running logic state again, and then perform the shutdown operation, adjust the external conditions and repeat the detection until all dilution items are detected.
[0048] 5). End of test and overall control
[0049] After completing all the test processes, the automatic detection device controls the lithium bromide absorption refrigeration unit control system to perform a complete shutdown logic operation and summarize all the test results. The touch screen finally displays the results of all the test items, making it easier for operators to understand the overall performance of the system and possible problems.
[0050] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and utility model concept of the utility model within the technical scope disclosed by the utility model. Without departing from the concept of the utility model, simple deductions and substitutions can also be made, which should be covered by the protection scope of the utility model.
Claims
1. A program logic function detection device for a lithium bromide absorption refrigeration unit control system, characterized in that: include: A main controller for controlling the operation and data processing of the entire detection device, which is connected to a touch screen for displaying parameter changes during the test and operating the start and end of the test of the automatic detection device; The thermal resistance signal generator is used to simulate the thermal resistance temperature signal required for the operation of the lithium bromide system and send the simulated signal to the main controller, which is connected to the main controller.
2. The program logic function detection device of the lithium bromide absorption refrigeration unit control system according to claim 1, characterized in that: The main controller is connected to the lithium bromide absorption refrigeration unit control system through a circuit.
3. The program logic function detection device of the lithium bromide absorption refrigeration unit control system according to claim 1, characterized in that: The main controller adopts a programmable controller PLC.
4. The program logic function detection device of the lithium bromide absorption refrigeration unit control system according to claim 3, characterized in that: The programmable controller PLC includes a digital quantity and analog quantity expansion unit, a logic operation unit and a communication unit. The digital quantity and analog quantity expansion unit is connected to the lithium bromide absorption refrigeration unit control system, and the communication unit is respectively connected to the lithium bromide absorption refrigeration unit control system, a thermal resistance signal generator and a touch screen.
5. The program logic function detection device of the lithium bromide absorption refrigeration unit control system according to claim 4, characterized in that: The communication unit is connected to the thermal resistance signal generator in a 485 bus circuit.
6. The program logic function detection device of the lithium bromide absorption refrigeration unit control system according to claim 4, characterized in that: The communication unit is connected to the lithium bromide absorption refrigeration unit control system in a 485 bus mode.
7. The program logic function detection device of the lithium bromide absorption refrigeration unit control system according to any one of claims 1 to 6, characterized in that: The thermal resistance signal generator is selected from PT100 or PT1000.