PLC programmable control test box for full-automatic heat exchange unit
By using a modular design and enhanced functionality of the PLC programmable control test box, the problems of insufficient expansion modules and poor environmental adaptability of existing test boxes have been solved, achieving efficient testing and stable operation.
Patent Information
- Application Number
- CN202520708441.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-04-15
AI Technical Summary
The existing fully automatic heat exchanger test box has limited expansion modules, making it impossible to complete PLC program testing within a limited time. Furthermore, it cannot adapt to the high temperature, high humidity, and vibration noise environment, affecting the stability and service life of the device.
A modular PLC programmable control test box was designed, which includes optional expansion modules and shock absorption, heat dissipation and dehumidification functions. It adopts high-strength materials and anti-corrosion coating, and combines a cooling fan and a drying box to reduce environmental impact and increase the flexibility and stability of the device.
It enables selective expansion of modules according to testing needs, adapts to complex industrial environments, and improves testing efficiency, equipment lifespan, and stability.
Smart Images
Figure CN223910524U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to full -automatic heat exchanger unit test technical field especially relates to a kind of PLC programmable control test box for full -automatic heat exchanger unit. BACKGROUND
[0002] Full -automatic heat exchanger unit is an integrated heat exchange equipment, mainly used in central heating, refrigeration or industrial heat exchange system, realizes high efficiency, stable heat transfer by automation control.The core function is that the heat or cold of heat source (such as boiler, heat pump, thermal power plant) is transferred to user end (such as building heating, air conditioning system) by heat exchanger, and realizes automatic regulation and operation management by intelligent control.
[0003] Full -automatic heat exchanger unit is particularly important in normal operation in field, PLC programmable control test box can simulate the control logic of full -automatic heat exchanger unit, finds problem in the process of testing, and timely carries out troubleshooting and optimization to PLC program.But the test box for full -automatic heat exchanger unit of existing, expansion module is limited, cannot complete all test to PLC program in limited time.And existing device often neglects the field environment of full -automatic heat exchanger unit, heat exchanger unit generates heat when running, field temperature is usually higher, and it is related to the circulation of water, and the relative humidity of surrounding environment is also relatively large.Heat exchanger unit's water pump, fan and other operating components can generate vibration and noise, and long-time vibration can cause the internal elements of test box to loosen, affect its performance and stability. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of PLC programmable control test box for full -automatic heat exchanger unit, can selectively replace and increase expansion module according to test demand, satisfy multiple test requirements, can also play the role of heat dissipation, dispelling damp, shock absorption etc., adapt to various complex industrial environments, increase the service life and stability of device at the same time.
[0005] To achieve the above object, the utility model adopts the following technical scheme: a kind of PLC programmable control test box for full -automatic heat exchanger unit, including test box body, the box cover being set at the top of the test box body, the shock attenuation bottom plate being set at the bottom of the test box body and the heat dissipation fan and handle being set at the side of the test box;
[0006] The test box body includes test box shell, modular internal element being set in the test box shell and interactive display screen, function button area, voice area and warning light being set in the front of the test box shell and being connected with the modular internal element.
[0007] Optionally, the modular internal element includes a programmable logic controller arranged at the rear side of the inside of the test box shell, a first extension area arranged at one side of the programmable logic controller, a second extension area arranged at one side of the first extension area, a third extension area arranged at one side of the second extension area, other extension areas arranged at the other side of the programmable logic controller, a power supply arranged at the front side of the inside of the test box shell, an upper computer arranged at one side of the power supply, a relay arranged at one side of the upper computer, and a drying box arranged at the other side of the power supply.
[0008] Optionally, the function button area includes a multifunction button area, a power switch arranged below the multifunction button area, an extension switch area, a sensor analog switch area, and other switch areas.
[0009] Optionally, the multifunction button area includes a start button for starting the programmable logic controller, a stop button for stopping the programmable logic controller, a reset button for restarting the programmable logic controller, a manual button for manual test control, and an automatic button for automatic test control.
[0010] Optionally, the extension switch area includes an extension area first switch for enabling or disabling the first extension area, an extension area second switch for enabling or disabling the second extension area, an extension area third switch for enabling or disabling the third extension area, and an extension area other switch for enabling or disabling the other extension area.
[0011] Optionally, the sensor analog switch includes a temperature sensor analog switch, a pressure sensor analog switch, and a flow sensor analog switch, and the other switch area includes an upper computer switch and a relay switch.
[0012] Optionally, a transparent plate for observing the inside of the test box shell is arranged on the box cover.
[0013] The shock-absorbing bottom plate includes a shock-absorbing layer and an anti-skid pad arranged at the bottom of the shock-absorbing layer, the shock-absorbing layer is composed of a plurality of square shock-absorbing blocks arranged as an internal hollow structure, and the lower surface of the anti-skid pad is provided with a plurality of rubber suction cups.
[0014] Optionally, the surface of the test box shell is provided with a layer of anti-corrosion coating.
[0015] Therefore, the PLC programmable control test box for the full-automatic heat exchange unit has the following beneficial effects:
[0016] 1. The utility model discloses a modular design of the device can according to the test demand, carries out the reasonable choice of test extension or replacement, increases the practicability and applicability of device. Such as, combination one: 2 digital quantity input output extension module and 1 analog quantity input output extension module are applicable to the scene that needs a large number of digital quantity signal control and certain analog quantity signal acquisition and control;Combination two: 1 digital quantity input output extension module, 1 analog quantity input output extension module and 1 communication extension module can realize basic digital quantity and analog quantity control, and also can communicate with other equipment, realizes the interaction and remote monitoring of data. Meanwhile, the device still increases other extension area, further increases the flexibility of extension module, can according to the test demand, increase such as high speed counter module, thermocouple / thermal resistance input module or ethernet extension module.
[0017] 2. The utility model discloses a heat dissipation fan, anticorrosion coating and inside dry box (built-in drying agent) are set up on the test box shell, can play the heat dissipation, damp-removing effect in the field environment of full-automatic heat exchange unit, prevent the influence of external environment to internal control system and circuit. Meanwhile through the design of shock attenuation layer and antiskid pad, can reduce the influence of vibration to test box, increase device service life, reduce use cost, increase the use performance and stability of device.
[0018] The technical scheme of the utility model will be further described in detail below by means of the drawings and embodiments. DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor under the premise of not paying the creative labor.
[0020] Figure 1 The device structure schematic view provided by the utility model is shown in the figure;
[0021] Figure 2 The structure schematic view inside the test box shell provided by the utility model is shown in the figure;
[0022] Figure 3 The structure schematic view of shock attenuation bottom plate provided by the utility model is shown in the figure;
[0023] Figure 4 The bottom structure schematic view of antiskid pad provided by the utility model is shown in the figure;
[0024] : 11, test box shell; 12, programmable logic controller; 13a, first expansion area; 13b, second expansion area; 13c, third expansion area; 13d, other expansion area; 14, power supply; 15, host computer; 16, relay; 17, drying box; 21, interactive display screen; 22, multifunction button area; 23, power switch; 24, expansion switch area; 25, sensor analog switch area; 26, other switch area; 27, voice area; 28, warning light; 3, box cover; 31, transparent plate; 4, shock-absorbing bottom plate; 41, square shock-absorbing block; 42, non-slip pad; 43, rubber suction cup; 5, heat dissipation fan; 6, handle. DETAILED DESCRIPTION
[0025] The technical scheme of the utility model is further described below by means of the drawings and examples.
[0026] Examples
[0027] As Figures 1-4 shown, the utility model provides a kind of PLC programmable control test box for full-automatic heat exchange unit, including test box body, box cover 3 being arranged at the top of the test box body, shock-absorbing bottom plate 4 being arranged at the bottom of the test box body and heat dissipation fan 5 and handle 6 being arranged at the side of the test box.
[0028] The test box body includes test box shell 11, modular internal element being arranged in the test box shell 11 and interactive display screen 21 being arranged in the front of the test box shell 11 and being connected with the modular internal element, function button area, voice area 27 (sound alarm) and warning light 28 (light alarm).Wherein, test box shell 11 uses high-strength aluminum alloy and ABS plastic composite material, and a layer of anticorrosive coating is arranged on the surface of test box shell 11.
[0029] As Figure 2 shown, the modular internal element includes programmable logic controller 12 being arranged in the rear side of the test box shell 11, first expansion area 13a being arranged in one side of the programmable logic controller 12, second expansion area 13b being arranged in one side of the first expansion area 13a, third expansion area 13c being arranged in one side of the second expansion area 13b, other expansion area 13d being arranged in the other side of the programmable logic controller 12, power supply 14 being arranged in the front side of the test box shell 11, host computer 15 being arranged in one side of the power supply 14, relay 16 being arranged in one side of the host computer 15 and drying box 17 (built-in drying agent) being arranged in the other side of the power supply 14.
[0030] The programmable logic controller 12 can be a Siemens S7-200smart programmable controller, which fully meets the functional requirements of current fully automatic heat exchanger units. The expansion area can be appropriately selected based on the specific needs of the fully automatic heat exchanger unit at the site to adapt to different application scenarios, such as:
[0031] 1) Digital Input / Output (DI / DO) Expansion Module
[0032] It is used to process digital signals, such as the on / off state of switches and the activation and deactivation of relay 16. The input module is responsible for acquiring the on / off status signals of external devices, while the output module is used to control the start and stop of external devices.
[0033] In fully automatic heat exchange units, it can be used to monitor the operating status (input) of equipment such as water pumps and valves, and to control the start and stop of these devices (output). For example, the input module detects the operating feedback signal of the water pump, and the output module controls the opening and closing of the electric valve.
[0034] 2) Analog Input / Output (AI / AO) Expansion Module
[0035] It is mainly used to process continuously changing analog signals, such as signals output from sensors for temperature, pressure, and flow. The input module converts analog signals into digital signals for PLC processing, while the output module converts the digital signals output by the PLC back into analog signals for controlling equipment such as regulating valves.
[0036] In the heat exchanger unit, signals from temperature, pressure and flow sensors can be collected through the input module, and the opening of the electric regulating valve can be controlled through the output module to achieve precise control of temperature, pressure and flow.
[0037] 3) Communication expansion module
[0038] It enables communication between the PLC and other devices or systems. Common communication protocols include Modbus and Profibus.
[0039] It can be used to communicate with the host computer 15 (such as the interactive display screen 21) to upload and download data, making it convenient for operators to monitor and set up; it can also communicate with other intelligent devices (such as frequency converters, smart meters, etc.) to achieve integrated control of the system.
[0040] Example of combining the above three extension modules:
[0041] Combination one: 2 digital input / output expansion modules and 1 analog input / output expansion module. This combination is suitable for scenarios that require a large number of digital signal control and certain analog signal acquisition and control. For example, one digital input / output module is used to control the start and stop of water pumps and valves, and the other is used to monitor the running status of various devices; the analog input / output module is used to collect temperature, pressure, and other signals and control the regulating valve.
[0042] Combination two: 1 digital input / output expansion module, 1 analog input / output expansion module, and 1 communication expansion module. This combination can not only achieve basic digital and analog control, but also communicate with other devices to realize data interaction and remote monitoring.
[0043] Other possible expansion methods (expansion area), such as:
[0044] 4) High-speed counter module
[0045] Used for counting high-speed pulse signals, which can achieve precise position control and speed measurement. In heat exchanger units, if precise measurement or control of motor speed is required, a high-speed counter module can be used.
[0046] 5) Thermocouple / thermal resistance input module
[0047] Designed specifically for collecting signals from thermocouple or thermal resistance sensors, it can achieve high-precision temperature measurement. When precise measurement of heat exchange medium temperature is required, this module can be used.
[0048] 6) Ethernet expansion module
[0049] Provides an Ethernet communication interface, making it easy to connect to industrial Ethernet for remote monitoring and data transmission. It can be used to build an industrial Internet of Things system to achieve remote monitoring and management of heat exchanger units.
[0050] As shown in Figure 1 , the function key area includes a multifunction button area 22, a power switch 23, an expansion switch area 24, a sensor analog switch area 25, and other switch areas 26 arranged below the multifunction button area 22.
[0051] The multifunction button area 22 includes:
[0052] Start button, used to start the programmable logic controller 12. After pressing this button, the PLC program in the test box starts running, simulating the start-up process of the full-automatic heat exchanger unit, which will trigger a series of control logic, such as starting the circulating pump, opening the electric regulating valve, etc., to make the entire simulation system start working.
[0053] Stop button, used to stop the programmable logic controller 12 running, press the button, PLC program stops running, analog heat exchanger unit stop working. At this time, the circulating pump stops rotating, electric regulating valve is closed, the system enters the stop state.
[0054] Reset button, used to restart the programmable logic controller 12, when the system fails or abnormal stop, press the reset button can clear the fault flag, the system is restored to the initial state, in order to restart.
[0055] Manual button, used for manual test control, press the button, you can control each element.
[0056] Automatic button, used for automatic test control, press the button, PLC according to the preset program automatically controls the operation of the heat exchanger unit.
[0057] The expansion switch area 24 includes an expansion area first switch for enabling or disabling the first expansion area 13a, an expansion area second switch for enabling or disabling the second expansion area 13b, an expansion area third switch for enabling or disabling the third expansion area 13c, and an expansion area other switch for enabling or disabling the other expansion area 13d.
[0058] The sensor analog switch includes a temperature sensor analog switch, a pressure sensor analog switch and a flow sensor analog switch, and the other switch area 26 includes a host computer 15 switch and a relay switch. After opening the sensor analog switch, the test box can simulate different signal values of the corresponding sensor, so as to test the processing ability and control logic of the PLC to the sensor signal.
[0059] As shown in Figure 1 The box cover 3 is provided with a transparent plate 31 for observing the inside of the test box shell 11; the transparent plate 31 can be used to observe the internal elements in real time without opening the cover.
[0060] As shown in Figures 3-4 The shock absorbing bottom plate 4 includes a shock absorbing layer and an anti-skid pad 42 arranged at the bottom of the shock absorbing layer, the shock absorbing layer is composed of a plurality of square shock absorbing blocks 41, the square shock absorbing blocks 41 are arranged as hollow structures, and the lower surface of the anti-skid pad 42 is provided with a plurality of rubber suction cups 43, which can reduce the influence of vibration on the test box, increase the service life of the device, reduce the use cost, increase the use performance and stability of the device.
[0061] Therefore, the utility model discloses a kind of PLC programmable control test box for full-automatic heat exchange unit, can according to test demand, selectively replace and increase extension module, satisfy multiple test requirements, can also play the role of heat dissipation, damp, shock attenuation etc., adapt to various complex industrial environment, increase the service life and stability of device simultaneously.
[0062] Finally, it should be noted that: specific examples are applied in the text to explain the principles and implementation modes of the utility model, and the above example is only used to help understand the method and core idea of the utility model; at the same time, for those skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the utility model.
Claims
1. A PLC programmable control test box for fully automatic heat exchanger units, characterized in that: It includes a test chamber body, a cover on the top of the test chamber body, a shock-absorbing base plate on the bottom of the test chamber body, and a cooling fan and handle on the side of the test chamber; The test chamber body includes a test chamber shell, modular internal components disposed inside the test chamber shell, and an interactive display screen, function button area, voice area, and warning light disposed on the front of the test chamber shell and connected to the modular internal components.
2. The PLC programmable control test box for a fully automatic heat exchanger unit according to claim 1, characterized in that: The modular internal components include a programmable logic controller (PLC) located inside the rear side of the test chamber housing, a first expansion area located on one side of the PLC, a second expansion area located on one side of the first expansion area, a third expansion area located on one side of the second expansion area, other expansion areas located on the other side of the PLC, a power supply located inside the front side of the test chamber housing, a host computer located on one side of the power supply, a relay located on one side of the host computer, and a drying box located on the other side of the power supply.
3. The PLC programmable control test box for a fully automatic heat exchanger unit according to claim 2, characterized in that: The function key area includes a multi-function button area and a power switch, an extension switch area, a sensor analog switch area, and other switch areas located below the multi-function button area.
4. The PLC programmable control test box for a fully automatic heat exchanger unit according to claim 3, characterized in that: The multi-function button area includes a start button for starting the programmable logic controller, a stop button for stopping the programmable logic controller, a reset button for restarting the programmable logic controller, a manual button for manual test control, and an automatic button for automatic test control.
5. A PLC programmable control test box for a fully automatic heat exchanger unit according to claim 4, characterized in that: The extended switch area includes an extended area first switch for enabling or disabling the first extended area, an extended area second switch for enabling or disabling the second extended area, an extended area third switch for enabling or disabling the third extended area, and other extended area switches for enabling or disabling the other extended areas.
6. The PLC programmable control test box for a fully automatic heat exchanger unit according to claim 5, characterized in that: The sensor simulation switch includes a temperature sensor simulation switch, a pressure sensor simulation switch, and a flow sensor simulation switch. The other switch area includes a host computer switch and a relay switch.
7. A PLC programmable control test box for a fully automatic heat exchanger unit according to claim 6, characterized in that: The lid of the test chamber is equipped with a transparent plate for observing the inside of the test chamber. The shock-absorbing base plate includes a shock-absorbing layer and an anti-slip pad disposed at the bottom of the shock-absorbing layer. The shock-absorbing layer is composed of multiple square shock-absorbing blocks, which are configured with an internal hollow structure. The lower surface of the anti-slip pad is provided with multiple rubber suction cups.
8. A PLC programmable control test box for a fully automatic heat exchanger unit according to claim 7, characterized in that: The surface of the test chamber shell is coated with an anti-corrosion coating.