CN211451299U - Distributed control box of tail end air conditioner - Google Patents
Distributed control box of tail end air conditioner Download PDFInfo
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- CN211451299U CN211451299U CN201922168996.8U CN201922168996U CN211451299U CN 211451299 U CN211451299 U CN 211451299U CN 201922168996 U CN201922168996 U CN 201922168996U CN 211451299 U CN211451299 U CN 211451299U
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Abstract
The utility model discloses a distributed control box of a terminal air conditioner, which comprises a cabinet body, wherein a wire slot, an air switch, a switching power supply, a socket, a PLC communication module and a PLC acquisition module are arranged in the cabinet body; the operating state collector and the sensor of the field device are connected to a wiring terminal of the PLC collection module through signal lines and wire grooves, the PLC collection module is connected to one side of the PLC communication module through a buckle, and the PLC communication module is connected with the upper-level control system through a net port. The utility model is more suitable for the end system with dispersed control objects, uses PLC as the control core, keeps the powerful program editing function, and simultaneously can compare favourably with DDC system in cost and construction simplification; the control box can be used for centralized control of the air conditioning box at the tail end of the building, and forms good interaction with a central air conditioning control system, so that the purposes of comprehensive management and energy-saving control are achieved.
Description
Technical Field
The utility model belongs to terminal air conditioner control field of building, concretely relates to terminal air conditioner distributed control case can form good interdynamic with central air conditioning control system, reaches integrated management and energy-saving control's purpose.
Background
The energy consumption of the air conditioning system accounts for 40% -60% of the total energy consumption of the public building, and is the greatest importance of social energy conservation and emission reduction. For the energy saving of the central air-conditioning system, the central air-conditioning control system cannot be relied on only, and the energy saving system is also required to be combined with the tail end air-conditioning control. Conventional end air conditioning control will employ DDC systems, DDC's are easy to use and program hardened, and their control logic is often not updated and does not maintain an overall optimization with the central air conditioning control system. The existing terminal air conditioner control cabinet needs to be mixed with other control systems and is directly connected with a computer control end, so that the control cost is high, and real distributed acquisition and control cannot be realized.
SUMMERY OF THE UTILITY MODEL
To the defect that above-mentioned prior art exists, the utility model provides a terminal air conditioner distributed control box is applicable to the terminal system of object dispersion, and control logic can be updated, jointly realizes the optimization operation with central air conditioning control system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the tail end air conditioner distributed control box comprises a cabinet body, wherein a wire slot, an air switch, a switching power supply and a socket are arranged in the cabinet body, and the tail end air conditioner distributed control box also comprises a PLC communication module and a PLC acquisition module; the operating state collector and the sensor of the field device are both connected to a wiring terminal of the PLC collection module through a signal wire and a wire slot, the PLC collection module is connected to one side of the PLC communication module through a buckle, and the PLC communication module is connected with the upper-level control system through a network port; the PLC communication module transmits the acquisition signal of the PLC acquisition module to the upper-level control system, and the upper-level control system immediately controls the operation of the field device according to the acquisition signal.
As one of the preferred schemes of the utility model, the field device includes geomantic omen system equipment, and PLC communication module, PLC collection module and last one-level control system linkage make geomantic omen system move to the optimum.
As one of the preferred schemes of the utility model, still include failure alarm module, PLC communication module and PLC collection module are connected to failure alarm module, and the trouble includes filter screen pressure difference trouble, temperature and humidity sensor trouble, frequency conversion trouble and water valve trouble, arbitrary when the trouble appears, corresponding alarm signal is sent automatically to failure alarm module.
As one of the preferable schemes of the utility model, the inlet wire of the air switch is connected with a 220V external power supply, the AC220V inlet wire of the switch power supply is connected with the outlet end of the air switch, and the socket is connected with the outlet end of the air switch; the PLC communication module is connected with a 24V outgoing line end of the switch power supply through the line slot.
Compared with the prior art, the utility model, the more terminal system that is applicable to the control object dispersion to PLC is control core, has remain powerful program editing function, also can compare favourably with the DDC system on cost, construction are simplified simultaneously. The control box can be used for centralized control of the air conditioning box at the tail end of the building, and forms good interaction with a central air conditioning control system, so that the purposes of comprehensive management and energy-saving control are achieved.
Drawings
Fig. 1 is a schematic diagram of a distributed control box of the terminal air conditioner of the present invention;
Detailed Description
The technical solution of the present invention will be further explained below.
As shown in fig. 1, the distributed control box of the terminal air conditioner of the present invention includes a cabinet body 1, a wire casing 2, an air switch 3, a switching power supply 4, a socket 5, a PLC communication module 6, and a PLC acquisition module 7; wherein all components are fixed in the cabinet body 1, the inlet wire of the air switch 3 is connected with a 220V external power supply, the inlet wire of AC220V of the switch power supply 4 is connected with the outlet end of the air switch 3, and the socket 5 is connected with the outlet end of the air switch 3. PLC communication module 6 connects switching power supply 4's 24V power outlet terminal through wire casing 2, and PLC collection module 7 passes through the buckle lug connection behind PLC communication module 6. The running state of the field device and the signals of the sensors are connected to the wiring terminals 8 of the corresponding PLC acquisition modules 7 through the wire grooves 2 through the preset signal wires, the PLC acquisition modules 7 simply process the signals and then send the signals to the PLC communication modules 6, and the PLC communication modules 6 upload the signals to the upper-level control system through the network ports according to the preset configured programs.
In this embodiment, the last-stage control system is a central air conditioner centralized control box, the distributed control boxes of the end air conditioners mainly realize distributed collection work of first-stage-end air conditioners, and the logic operation is performed on a second-stage-last-stage control box. For example, 10 floors, every layer all has the object that needs control, with this embodiment terminal air conditioner distributed control box installs in every floor, gathers every layer of equipment through PLC collection module, and rethread PLC communication module transmits to total control box, can realize low-cost collection work and accurate control effect.
Specifically, the field device comprises a wind and water system device, and the PLC communication module and the PLC acquisition module are linked with a previous-level control system, so that the wind and water system operates to the optimum. The method can be realized by the following steps:
a) through linkage adjustment of a wind-water system, indoor temperature is reasonably controlled
The PLC acquisition module acquires parameters in real time, the PLC communication module transmits acquired signals to the upper-level control system, and the upper-level control system performs control through optimization operation program analysis and operation, so that the energy-saving purpose is achieved. By restraining the over-regulation of the temperature, the temperature of the returned air is ensured to be deviated and controlled within the required range, and the phenomenon of supercooling or overheating of the temperature can be ensured not to occur.
Refrigeration working condition: the system monitors the air supply temperature and the air return temperature, compares the air supply temperature with the set temperature, outputs the air supply temperature and the air return temperature through program operation, controls the output frequency of the frequency converter and the opening of the water valve in a split-range mode, increases the opening of the cold water valve and the cold water flow when the air return temperature is higher than the set temperature, can not meet the requirement when the water valve is fully opened, and automatically adjusts the operating frequency of the frequency converter until the frequency conversion reaches the maximum operating frequency; when the return air temperature is equal to the set temperature, the output is kept unchanged, when the return air temperature is lower than the set temperature, the output frequency of the frequency converter is preferentially adjusted, when the frequency conversion runs to the lowest frequency and the temperature is lower than the set temperature, the opening degree of the cold water valve is adjusted until the temperature requirement is met or the cold water valve is completely closed, and the return air temperature is controlled within the set requirement range.
Heating working conditions are as follows: the system monitors the air supply temperature and the air return temperature, compares the air supply temperature with the set temperature, outputs the air supply temperature and the air return temperature through program operation, controls the output frequency of the frequency converter and the opening of the hot water valve in a split-range mode, increases the opening of the hot water valve and the hot water flow when the air return temperature is lower than the set temperature, can not meet the requirement when the water valve is fully opened, and automatically adjusts the operating frequency of the frequency converter until the frequency conversion reaches the maximum operating frequency; when the return air temperature is equal to the set temperature, the output is kept unchanged, when the return air temperature is higher than the set temperature, the output frequency of the frequency converter is preferentially adjusted, when the frequency conversion runs to the lowest frequency and the temperature is lower than the set temperature, the opening degree of the hot water valve is adjusted until the temperature requirement is met or the hot water valve is completely closed, and the return air temperature is controlled within the set requirement range.
b) Fresh air cooling in transitional season, energy saving and consumption reduction
In a transition season or a refrigeration season, judging whether fresh air cold air meets the requirements or not through fresh air temperature and humidity acquisition and calculation enthalpy and indoor/return air temperature and humidity acquisition enthalpy, preferentially utilizing fresh air for refrigeration, and reducing the consumption of cold water, so that the energy consumption of a central air-conditioning system is reduced;
c) linkage central air-conditioning control system for integral optimization operation
Through linkage with the central air-conditioning control system, the schedule function can be customized in a centralized manner, and an equipment starting strategy is formulated. According to the load demand, the air outlet temperature and the water outlet temperature are dynamically adjusted, and the optimization and energy conservation are achieved on the basis of meeting the use demand of customers.
This embodiment terminal air conditioner distributed control box still includes fault alarm module (not shown in the figure), and PLC communication module and PLC collection module are connected to fault alarm module, and the trouble includes filter screen pressure difference trouble, temperature and humidity sensor trouble, frequency conversion trouble and water valve trouble, arbitrary when the trouble appears, corresponding alarm signal is sent automatically to fault alarm module. For example:
when the pressure difference of the filter screen exceeds the set requirement, the system automatically sends out an alarm signal to remind a user to replace the filter screen.
When the sensor exceeds normal display, the system automatically sends out an alarm signal to remind a user to check, and after a fault is eliminated, the system automatically and normally displays.
When the system detects a fault point of the frequency converter, the system automatically sends out an alarm signal to remind a user of checking, and after the fault is eliminated, the system displays normally.
And comparing the water valve with the air supply temperature, and when the water valve is inconsistent with the air supply temperature, judging that the water valve is in failure by the system, and sending an alarm signal to remind a user of checking.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing has been a detailed description of the preferred embodiments and principles of the present invention, and it will be apparent to those skilled in the art that variations may be made in the specific embodiments based on the concepts of the present invention, and such variations are considered as within the scope of the present invention.
Claims (4)
1. Terminal air conditioner distributed control case, including the cabinet body, the internal wire casing, air switch, switching power supply, socket that are equipped with of cabinet, its characterized in that: the PLC communication module and the PLC acquisition module are also included;
the operating state collector and the sensor of the field device are both connected to a wiring terminal of the PLC collection module through a signal wire and a wire slot, the PLC collection module is connected to one side of the PLC communication module through a buckle, and the PLC communication module is connected with the upper-level control system through a network port; the PLC communication module transmits the acquisition signal of the PLC acquisition module to the upper-level control system, and the upper-level control system immediately controls the operation of the field device according to the acquisition signal.
2. The end air conditioning distributed control box of claim 1, wherein: the field device comprises a wind and water system device, and the PLC communication module and the PLC acquisition module are linked with a previous-level control system, so that the wind and water system operates to the optimum.
3. The end air conditioning distributed control box of claim 1, wherein: the intelligent monitoring system is characterized by further comprising a fault alarm module, wherein the fault alarm module is connected with the PLC communication module and the PLC acquisition module, faults comprise filter screen pressure difference faults, temperature and humidity sensor faults, frequency conversion faults and water valve faults, and when any fault occurs, the fault alarm module automatically sends out a corresponding alarm signal.
4. The end air conditioning distributed control box of claim 1, wherein: the inlet wire of the air switch is connected with a 220V external power supply, the inlet wire of AC220V of the switch power supply is connected with the outlet end of the air switch, and the socket is connected with the outlet end of the air switch; the PLC communication module is connected with a 24V outgoing line end of the switch power supply through the line slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922168996.8U CN211451299U (en) | 2019-12-06 | 2019-12-06 | Distributed control box of tail end air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922168996.8U CN211451299U (en) | 2019-12-06 | 2019-12-06 | Distributed control box of tail end air conditioner |
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| CN211451299U true CN211451299U (en) | 2020-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116045468A (en) * | 2022-12-08 | 2023-05-02 | 珠海格力电器股份有限公司 | Control method and device of fresh air system, fresh air system and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116045468A (en) * | 2022-12-08 | 2023-05-02 | 珠海格力电器股份有限公司 | Control method and device of fresh air system, fresh air system and storage medium |
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