CN103776132A - Energy-saving control system of central air conditioner - Google Patents
Energy-saving control system of central air conditioner Download PDFInfo
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- CN103776132A CN103776132A CN201410048885.2A CN201410048885A CN103776132A CN 103776132 A CN103776132 A CN 103776132A CN 201410048885 A CN201410048885 A CN 201410048885A CN 103776132 A CN103776132 A CN 103776132A
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Abstract
The invention discloses an energy-saving control system of a central air conditioner, and aims to solve the problem that the conventional energy-saving control system of the central air conditioner is unreasonable in structure, low in energy-saving efficiency, high in fault probability and difficult to maintain. The control system comprises at least three independent-operation executive modules; each executive module comprises a frequency converter and a water pump controlled by the frequency converter; the executive modules are adopted as a main pump, an auxiliary pump and a stand-by pump; the power circuit and the controlling circuit of each frequency-conversion pump are not in any direct horizontal connection; the frequency-conversion pump can operate independently without depending on a controller and other controlling circuits, and is a basic module of the system; all the frequency-conversion pumps are controlled by a CPU uniformly in normal operation. The control system is reasonable in structural design, high in energy-saving efficiency and convenient to maintain.
Description
Technical field
The present invention relates to central air-conditioning technical field, particularly controlling system of central air conditioner.
Background technology
In the energy that the current building of China consumes, the ratio that indoor air-conditioning system energy consumption accounts for is about 50%, and illumination proportion is 33%, and visible air conditioning energy consumption is very large; Along with air-conditioning is universal rapidly, power load is surged year by year, and air conditioning energy consumption has accounted for 15% left and right of national power consumption.
It is the best mode of realizing energy saving of system operation that water circulation system of central air conditioning adopts variable-flow control, in current newly-designed system, variable-flow control is proposed as basic demand, and in the time that the system to old is carried out reducing energy consumption, variable-flow control is also preferred option.The circulatory system adopts the energy-saving effect of variable-flow control to be confirmed by theory and practice already, but still has some problems.
There are quite a few user and energy-saving equipment supplier simply to think that frequency conversion is exactly energy-conservation, therefore the directly circulatory system for central air-conditioning frequency-conversion water supply system, result causes energy-saving effect not obvious, when serious, even cause central air conditioner system normally to work, this is because frequency-conversion water supply system is generally taked constant voltage control, set pressure of supply water according to user's lift, and the flow of water circulation system of central air conditioning and pressure independent, relevant to the pressure reduction between feedwater and the backwater of system, in the time that water circulation system of central air conditioning is taked pressure control, if set value higher, system still can maintain operation reluctantly, but energy-saving effect is had a greatly reduced quality, if reduce setting value, atmospheric pressure, expansion tank water level, circulating water temperatures etc. will be very obvious on the impact of hydraulic pressure, direct result is affect central air conditioner system operation stable, when serious, can cause central air conditioner system normally to work, this type of user, after of short duration use is pinpointed the problems, generally take to abandon processing, cause serious waste.
The recirculated water variable-flow control system of comparative maturity is taked frequency conversion mostly, power frequency mixed running pattern, both in the time that load is lighter, moved by a pump variable frequency, when running frequency reaches 50 hertz still can not meet traffic demand time, take to add a power frequency operation water pump, variable frequency pump be used for the covering the shortage operational mode of part, the feature of this operational mode is the power saving can solve preferably central air conditioner system underrun time, but, in the time moving with charging pump for two, energy-saving efficiency declines simultaneously, reason is that power frequency operation water pump is not energy-conservation, the variable frequency pump of operation is in the time of low-frequency operation simultaneously, when pump head insufficient pressure is when pushing ball-and-seat open, system is not contributed, even if at this moment only need variable frequency pump to supplement very low discharge, variable frequency pump also need to just start that in the time approaching power frequency operation system is had to contribution, and to variable frequency pump, the operational mode of high-frequency low discharge is obviously inefficient, and in the time that system needs larger flow, peak often, paddy, the peak period of ordinary telegram valency, the economic benefit of this period economize on electricity is very important.
At present generally take focus control mode at the controlling system of central air conditioner of use, both, the equipment relevant with central air-conditioning, sensor, controller are done to as a whole design, loaded down with trivial details, a numerous and jumbled control system of the compositions such as a major loop of finished product, secondary control loop, sensor, controller, result causes the operation stability of system poor, probability of malfunction is higher, and maintenance personal's technical requirement is high.
The master controller of controlling system of central air conditioner generally adopts PLC at present, sort controller belongs to industrial general equipment, be characterized in versatility, strong adaptability but professional poor, although it is out of question technically to use it for controlling system of central air conditioner, but due to unprofessional, implement cumbersomely, make finished product control loop more complicated, potential faults is relatively many, keeps in repair also more difficult.
Summary of the invention
The object of the present invention is to provide a kind of controlling system of central air conditioner, in order to solve, controlling system of central air conditioner unreasonable structure energy-saving efficiency of the prior art is low, the problem of the high maintenance difficult of probability of malfunction.
For addressing the above problem, the technical solution used in the present invention is:
A kind of controlling system of central air conditioner, comprises central processing unit, also comprises:
The separate Executive Module of at least three covers, the described Executive Module of every cover includes a frequency converter and the water pump by described Frequency Converter Control; Described frequency converter drives water pump operation by motor, and described central processing unit joins with each frequency converter respectively by control instruction output interface, and controls each frequency converter and complete energy-conservation variable-flow control;
Setting module, is connected alternately with described central processing unit, for setting the task of central air-conditioning;
Input interface, joins by described setting module and described central processing unit; Be used for the feedback information of total flow, general power, supply water temperature, pressure of supply water, return water temperature, pressure of return water and each described frequency converter of real-time acquisition system;
Marshalling module, is connected with described central processing unit, alternately for distributing each frequency converter to serve as the one of main pump, auxiliary pump, stand-by pump; After arbitrary Executive Module breaks down, fault message is sent to described marshalling module by described central processing unit, takes over fault Executive Module move by other Executive Modules of marshalling module arrangement;
Start control module, be connected alternately with described central processing unit, for controlling starting or stoping of described controlling system of central air conditioner;
Switch board card, is connected alternately with each frequency converter, frequency display list is set, the indicator lamp that powers on, manual fm dial on described switch board, and described frequency display list, the indicator lamp that powers on, manually fm dial is corresponding one by one with frequency converter.
Wherein, the main task of described setting module is the task of initialization system, if carry out chilled water cycle task, system is taked with reference to the poor control model of voltage stabilizing to, backwater temperature difference.Under normal circumstances, system pressure difference is stabilized in the minimum of a value that system allows, and in the time that the traffic demand of system changes, reaches by changing frequency the object of stablizing pressure reduction change flow.Occur if be in operation to, backwater temperature difference departs from low-temperature receiver optimum condition, system is revised pressure differential resetting value automatically, system, with revised pressure reduction stable operation, makes low-temperature receiver remain at optimum condition high-efficiency operation.In the time that flow system flow demand is too low, variable frequency pump stops after the low-limit frequency of setting slowing down reaching, and realizes the poor adjusting of voltage stabilizing, to guarantee the required minimum discharge of refrigerator by balanced valve.If Controlled cooling system circulation, generally take to, backwater temperature difference control, now balanced valve is for solving the problem that causes refrigerator normally to start because cooling water temperature is too low.In the transition period in season, because cooling water outdoor section temperature is on the low side, sometimes can cause refrigerator difficulty in starting, at this moment system is opened balanced valve automatically, make cooling water in indoor section short-circuit cycle, until cooling water temperature reaches normal value, more progressively closes balanced valve, slowly add cold tower cold water until whole cooling water system temperature reaches normal value.Other,, as heat-exchange system etc., need determine control mode as the case may be.Because native system is taked modularized design, can be at any time by the various special setting modules of user's request exploitation.
Start control module, as the startup of system and stop controlling, can arrange flexibly according to user's requirement, conventional alternative has: 1) automatically opened, stop to control by the timetable of controller internal memory, timetable can be adjusted arbitrarily on demand; 2) control (needing refrigerator and boiler that start-stop command point is provided) with refrigerator or boiler interlock; 3) central station is directly controlled; 4) in the simple manually control of device context (a control system start-stop, the energy-saving and frequency-variable control after system starts is still completed automatically by controller); 5) other start-stop mode.
Preferably, described central processing unit is connected with the system effectiveness detection module for detection of the instant efficiency of system; Described system effectiveness detection module is connected alternately with described central processing unit; Described system effectiveness detection module and described switch board card are joined, and the instant efficiency of system is sent to the Displaying Meter in described switch board card by described system effectiveness detection module.
Further, described system effectiveness detection module has the function that monitors that efficiency value changes, and when efficiency value variation abnormality, described system effectiveness detection module is automatic alarm, and warning message is sent to described central processing unit; On described central processing unit, be connected with computer, warning message is sent to described computer by described central processing unit.This module calculates the instant efficiency (cubic meter/kilowatt hour) of system according to the instant flow of system and real-time power, on the one hand this efficiency value being converted to standard signal send switch board card instrument to show, automatic monitoring efficiency value change information simultaneously, automatic alarm notes abnormalities.
Preferably, also comprise System self-test module, described System self-test module is joined with described input interface, described setting module, described control instruction output interface and described central processing unit respectively; Described System self-test module receives the information of described input interface, described setting module and described control instruction output interface, collect output order and implementation status, system temperature, pressure, flow, power information, through the comparative analysis of logic judgement and setting value, whether the work of decision-making system each several part is normal, if any abnormal automatic alarm, and default processing scheme is sent to described central processing unit to adjust control instruction; The warning message of described System self-test module is sent to described computer by described central processing unit.System is in operation and detects that main pump is abnormal, except automatic alarm, also will automatically stop main pump operation, and order auxiliary pump is taken over main pump task simultaneously, and stand-by pump is promoted as auxiliary pump.In like manner, find that auxiliary pump is abnormal if be in operation, stand-by pump is taken over auxiliary pump operation.
Preferably, described central processing unit is DDC cyclelog.The nonshared control unit DDC cyclelog that adopts central air conditioning system, can make central air conditioning system of the present invention not establish contactor at power loop, and this just makes once to connect up extremely terse, not only reduces system self energy consumption but also reduced trouble point.Native system control loop directly connects DDC controller by frequency converter, there is no the transition control loops such as auxiliary reclay, and between each Executive Module, without horizontal interlocking loop, system simple, intuitive, installs, overhauls very convenient.
Preferably, in described switch board card, be provided with maintenance and emergent rotary switch.Due to the particular design of native system, system maintenance is very convenient.For example, staff has abnormal sound at a system discovery in service water pump, can directly the control knob of this water pump be threaded to (stopping) position, at this pump gradually in ramp to stop, taking over pump automatically starts and raises speed gradually, two pumps smoothly join, and system keeps stable operation at the automatic treatment state of fault.Complete when this pump maintenance, control knob can be threaded to (manually booting) position, rotation frequency modulation button check maintenance result, as without abnormal, can directly be threaded to control knob (automatically) position, and system will automatically restore to normal marshalling running status.
Preferably, in described switch board card, be provided be used to indicate supply voltage value voltmeter, be used to indicate the flowmeter of the instant total flow of system and be used to indicate the efficiency table of the instant efficiency of system.
Preferably, system comprises the described Executive Module of three covers.
The beneficial effect of controlling system of central air conditioner of the present invention is:
Controlling system of central air conditioner of the present invention forms separate each Executive Module by least three cover variable frequency pumps.The power loop of each cover variable frequency pump and control loop are without any direct lateral ties, every cover variable frequency pump can not rely on controller and other control loop independent operating, every cover variable frequency pump is a basic module of system, respectively overlaps variable frequency pump unified control of accepting central processing unit in the time of normal work; Reasonable in design, energy-saving efficiency is high.Native system control loop directly connects DDC controller by frequency converter, there is no the transition control loops such as auxiliary reclay, and between each Executive Module, without horizontal interlocking loop, system simple, intuitive, installs, overhauls very convenient.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structured flowchart of controlling system of central air conditioner of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The specific embodiment
A kind of controlling system of central air conditioner, comprises central processing unit, also comprises:
The separate Executive Module of at least three covers, every cover Executive Module includes a frequency converter and the water pump by Frequency Converter Control; Frequency converter drives water pump operation by motor, and central processing unit joins with each frequency converter respectively by control instruction output interface, and controls each frequency converter and complete energy-conservation variable-flow control;
Setting module, is connected alternately with central processing unit, for setting the task of central air-conditioning;
Input interface, joins by setting module and central processing unit; Be used for the feedback information of total flow, general power, supply water temperature, pressure of supply water, return water temperature, pressure of return water and each frequency converter of real-time acquisition system;
Marshalling module, is connected with central processing unit, alternately for distributing each frequency converter to serve as the one of main pump, auxiliary pump, stand-by pump; After arbitrary Executive Module breaks down, fault message is sent to marshalling module by central processing unit, takes over fault Executive Module move by other Executive Modules of marshalling module arrangement;
Start control module, be connected alternately with central processing unit, for controlling starting or stoping of controlling system of central air conditioner;
Switch board card, is connected alternately with each frequency converter, frequency display list is set, the indicator lamp that powers on, manual fm dial on switch board, and frequency display list, the indicator lamp that powers on, manually fm dial is corresponding one by one with frequency converter.
As preferred embodiment, central processing unit is connected with the system effectiveness detection module for detection of the instant efficiency of system; System effectiveness detection module is connected alternately with central processing unit; System effectiveness detection module and switch board card are joined, and the instant efficiency of system is sent to the Displaying Meter in switch board card by system effectiveness detection module.
Further, system effectiveness detection module has the function that monitors that efficiency value changes, and when efficiency value variation abnormality, system effectiveness detection module is automatic alarm, and warning message is sent to central processing unit; On central processing unit, be connected with computer, warning message is sent to computer by central processing unit.
As preferred embodiment, also comprise System self-test module, System self-test module is joined with input interface, setting module, control instruction output interface and central processing unit respectively; System self-test module receives the information of input interface, setting module and control instruction output interface, collect output order and implementation status, system temperature, pressure, flow, power information, through the comparative analysis of logic judgement and setting value, whether the work of decision-making system each several part is normal, if any abnormal automatic alarm, and default processing scheme is sent to central processing unit to adjust control instruction; The warning message of System self-test module is sent to computer by central processing unit.
As preferred embodiment, central processing unit is DDC cyclelog.
As preferred embodiment, in switch board card, be provided with maintenance and emergent rotary switch.
As preferred embodiment, in switch board card, be provided be used to indicate supply voltage value voltmeter, be used to indicate the flowmeter of the instant total flow of system and be used to indicate the efficiency table of the instant efficiency of system.
As preferred embodiment, system comprises three cover Executive Modules.
Embodiment 1
As shown in Figure 1, a kind of controlling system of central air conditioner, comprises central processing unit, also comprises:
The separate Executive Module of three covers, every cover Executive Module includes a frequency converter and the water pump by Frequency Converter Control; Frequency converter drives water pump operation by motor, and central processing unit joins with each frequency converter respectively by control instruction output interface, and controls each frequency converter and complete energy-conservation variable-flow control;
Setting module, is connected alternately with central processing unit, for setting the task of central air-conditioning;
Input interface, joins by setting module and central processing unit; Be used for the feedback information of total flow, general power, supply water temperature, pressure of supply water, return water temperature, pressure of return water and each frequency converter of real-time acquisition system;
Marshalling module, is connected with central processing unit, alternately for distributing each frequency converter to serve as the one of main pump, auxiliary pump, stand-by pump; After arbitrary Executive Module breaks down, fault message is sent to marshalling module by central processing unit, takes over fault Executive Module move by other Executive Modules of marshalling module arrangement;
Start control module, be connected alternately with central processing unit, for controlling starting or stoping of controlling system of central air conditioner;
Switch board card, is connected alternately with each frequency converter, frequency display list is set, the indicator lamp that powers on, manual fm dial on switch board, and frequency display list, the indicator lamp that powers on, manually fm dial is corresponding one by one with frequency converter.
Controlling system of central air conditioner of the present invention by independently three cover variable frequency pumps form three separate Executive Modules.The power loop of three cover variable frequency pumps and control loop are without any direct lateral ties, every cover variable frequency pump can not rely on controller and other control loop independent operating, every cover variable frequency pump is a basic module of system, the unified control of accepting central processing unit in the time of normal work of three cover variable frequency pumps.
Wherein, the main task of setting module is the task of initialization system, if carry out chilled water cycle task, system is taked with reference to the poor control model of voltage stabilizing to, backwater temperature difference.Under normal circumstances, system pressure difference is stabilized in the minimum of a value that system allows, and in the time that the traffic demand of system changes, reaches by changing frequency the object of stablizing pressure reduction change flow.Occur if be in operation to, backwater temperature difference departs from low-temperature receiver optimum condition, system is revised pressure differential resetting value automatically, system, with revised pressure reduction stable operation, makes low-temperature receiver remain at optimum condition high-efficiency operation.In the time that flow system flow demand is too low, variable frequency pump stops after the low-limit frequency of setting slowing down reaching, and realizes the poor adjusting of voltage stabilizing, to guarantee the required minimum discharge of refrigerator by balanced valve.If Controlled cooling system circulation, generally take to, backwater temperature difference control, now balanced valve is for solving the problem that causes refrigerator normally to start because cooling water temperature is too low.In the transition period in season, because cooling water outdoor section temperature is on the low side, sometimes can cause refrigerator difficulty in starting, at this moment system is opened balanced valve automatically, make cooling water in indoor section short-circuit cycle, until cooling water temperature reaches normal value, more progressively closes balanced valve, slowly add cold tower cold water until whole cooling water system temperature reaches normal value.Other,, as heat-exchange system etc., need determine control mode as the case may be.Because native system is taked modularized design, can be at any time by the various special setting modules of user's request exploitation.
Start control module, as the startup of system and stop controlling, can arrange flexibly according to user's requirement, conventional alternative has: 1) automatically opened, stop to control by the timetable of controller internal memory, timetable can be adjusted arbitrarily on demand; 2) control (needing refrigerator and boiler that start-stop command point is provided) with refrigerator or boiler interlock; 3) central station is directly controlled; 4) in the simple manually control of device context (a control system start-stop, the energy-saving and frequency-variable control after system starts is still completed automatically by controller); 5) other start-stop mode.
Central processing unit is also connected with the system effectiveness detection module for detection of the instant efficiency of system; System effectiveness detection module is connected alternately with central processing unit; System effectiveness detection module and switch board card are joined, and the instant efficiency of system is sent to the Displaying Meter in switch board card by system effectiveness detection module.
System effectiveness detection module has the function that monitors that efficiency value changes, and when efficiency value variation abnormality, described system effectiveness detection module is automatic alarm, and warning message is sent to described central processing unit; On described central processing unit, be connected with computer, warning message is sent to described computer by described central processing unit.This module calculates the instant efficiency (cubic meter/kilowatt hour) of system according to the instant flow of system and real-time power, on the one hand this efficiency value being converted to standard signal send switch board card instrument to show, automatic monitoring efficiency value change information simultaneously, automatic alarm notes abnormalities.
Controlling system of central air conditioner of the present invention also comprises System self-test module, and System self-test module is joined with input interface, setting module, control instruction output interface and central processing unit respectively; System self-test module receives the information of input interface, setting module and control instruction output interface, collect output order and implementation status, system temperature, pressure, flow, power information, through the comparative analysis of logic judgement and setting value, whether the work of decision-making system each several part is normal, if any abnormal automatic alarm, and default processing scheme is sent to central processing unit to adjust control instruction; The warning message of System self-test module is sent to computer by central processing unit.System is in operation and detects that main pump is abnormal, except automatic alarm, also will automatically stop main pump operation, and order auxiliary pump is taken over main pump task simultaneously, and stand-by pump is promoted as auxiliary main pump.In like manner, find that auxiliary pump is abnormal if be in operation, stand-by pump is taken over auxiliary pump operation.
Wherein, central processing unit is DDC cyclelog.The nonshared control unit DDC cyclelog that adopts central air conditioning system, can make central air conditioning system of the present invention not establish contactor at power loop, and this just makes once to connect up extremely terse, not only reduces system self energy consumption but also reduced trouble point.Native system control loop directly connects DDC controller by frequency converter, there is no the transition control loops such as auxiliary reclay, and between each Executive Module, without horizontal interlocking loop, system simple, intuitive, installs, overhauls very convenient.
In switch board card, be provided with maintenance and emergent rotary switch.Due to the particular design of native system, system maintenance is very convenient.For example, staff has abnormal sound at a system discovery in service water pump, can directly the control knob of this water pump be threaded to (stopping) position, at this pump gradually in ramp to stop, taking over pump automatically starts and raises speed gradually, two pumps smoothly join, and system keeps stable operation at the automatic treatment state of fault.Complete when this pump maintenance, control knob can be threaded to (manually booting) position, rotation frequency modulation button check maintenance result, as without abnormal, can directly be threaded to control knob (automatically) position, and system will automatically restore to normal marshalling running status.
The voltmeter that is used to indicate in addition supply voltage value is set in switch board card, is used to indicate the flowmeter of the instant total flow of system and is used to indicate the efficiency table of the instant efficiency of system.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a controlling system of central air conditioner, comprises central processing unit, it is characterized in that, also comprises:
The separate Executive Module of at least three covers, the described Executive Module of every cover includes a frequency converter and the water pump by described Frequency Converter Control; Described frequency converter drives water pump operation by motor, and described central processing unit joins with each frequency converter respectively by control instruction output interface, and controls each frequency converter and complete energy-conservation variable-flow control;
Setting module, is connected alternately with described central processing unit, for setting the task of central air-conditioning;
Input interface, joins by described setting module and described central processing unit; Be used for the feedback information of total flow, general power, supply water temperature, pressure of supply water, return water temperature, pressure of return water and each described frequency converter of real-time acquisition system;
Marshalling module, is connected with described central processing unit, alternately for distributing each frequency converter to serve as the one of main pump, auxiliary pump, stand-by pump; After arbitrary Executive Module breaks down, fault message is sent to described marshalling module by described central processing unit, takes over fault Executive Module move by other Executive Modules of marshalling module arrangement;
Start control module, be connected alternately with described central processing unit, for controlling starting or stoping of described controlling system of central air conditioner;
Switch board card, is connected alternately with each frequency converter, frequency display list is set, the indicator lamp that powers on, manual fm dial on described switch board, and described frequency display list, the indicator lamp that powers on, manually fm dial is corresponding one by one with frequency converter.
2. controlling system of central air conditioner as claimed in claim 1, is characterized in that: described central processing unit is connected with the system effectiveness detection module for detection of the instant efficiency of system; Described system effectiveness detection module is connected alternately with described central processing unit; Described system effectiveness detection module and described switch board card are joined, and the instant efficiency of system is sent to the Displaying Meter in described switch board card by described system effectiveness detection module.
3. controlling system of central air conditioner as claimed in claim 2, it is characterized in that: described system effectiveness detection module has the function that monitors that efficiency value changes, when efficiency value variation abnormality, described system effectiveness detection module is automatic alarm, and warning message is sent to described central processing unit; On described central processing unit, be connected with computer, warning message is sent to described computer by described central processing unit.
4. controlling system of central air conditioner as claimed in claim 3, it is characterized in that: also comprise System self-test module, described System self-test module is joined with described input interface, described setting module, described control instruction output interface and described central processing unit respectively; Described System self-test module receives the information of described input interface, described setting module and described control instruction output interface, collect output order and implementation status, system temperature, pressure, flow, power information, through the comparative analysis of logic judgement and setting value, whether the work of decision-making system each several part is normal, if any abnormal automatic alarm, and default processing scheme is sent to described central processing unit to adjust control instruction; The warning message of described System self-test module is sent to described computer by described central processing unit.
5. controlling system of central air conditioner as claimed in claim 1, is characterized in that: described central processing unit is DDC cyclelog.
6. controlling system of central air conditioner as claimed in claim 1, is characterized in that: in described switch board card, be provided with maintenance and emergent rotary switch.
7. controlling system of central air conditioner as claimed in claim 3, is characterized in that: in described switch board card, be provided be used to indicate supply voltage value voltmeter, be used to indicate the flowmeter of the instant total flow of system and be used to indicate the efficiency table of the instant efficiency of system.
8. controlling system of central air conditioner as claimed in claim 1, is characterized in that: system comprises the described Executive Module of three covers.
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| CN104879880A (en) * | 2015-04-23 | 2015-09-02 | 江苏新科中央空调有限公司 | Healthy air conditioner detection system |
| CN105546772A (en) * | 2016-03-04 | 2016-05-04 | 丽水学院 | Energy-saving control method of central air conditioner |
| CN109695938A (en) * | 2018-11-30 | 2019-04-30 | 佛山市中格威电子有限公司 | A kind of air conditioner quickly control system of detection and custom parameter |
| CN115095925A (en) * | 2022-07-06 | 2022-09-23 | 贵州汇通华城股份有限公司 | Central air conditioning system based on independent dual-network dual-system |
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