CN105444363A - Control method for communication redundant faults of air-conditioning system and air-conditioning system - Google Patents
Control method for communication redundant faults of air-conditioning system and air-conditioning system Download PDFInfo
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- CN105444363A CN105444363A CN201511013989.0A CN201511013989A CN105444363A CN 105444363 A CN105444363 A CN 105444363A CN 201511013989 A CN201511013989 A CN 201511013989A CN 105444363 A CN105444363 A CN 105444363A
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- premises station
- control
- indoor set
- conditioning system
- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Abstract
The invention discloses a control method for communication redundant faults of an air-conditioning system and an air-conditioning system. The control method comprises the following steps that whether the communications of a connecting communication line of the air-conditioning system are interrupted or not is detected; when the communications of the connecting communication line are interrupted, an indoor machine controls an outdoor machine to be electrified/de-energized according to the temperature of a control region; when the outdoor machine is electrified, the outdoor machine works at preset frequency. According to the method, when RS485 communications are abnormally interrupted, the indoor machine and the outdoor machine enter an on-off control mode at the same time, according to the refrigeration requirements of a machine cabinet, the electrifying and the de-energizing of the outdoor machine are realized through controlling the on/off of a contactor, the outdoor machine is electrified under the on-off control mode so as to control a compressor to operate at the preset frequency, and the function that refrigeration is uninterrupted is realized after communications fail. Through the adoption of the method, time for solving failture can be provided for after-sale engineering staff, and besides, the operating reliability of an air conditioner can be improved.
Description
Technical field
The present invention relates to air conditioner controlling technology field, particularly a kind of communication fault-tolerant control method of air-conditioning system and air-conditioning system.
Background technology
Cabinet-type data center is integrated with the equipment such as power supply, battery, UPS, the network switch, monitoring, route, IT server, air-conditioning in a rack, whole rack wants stable operation to need air-conditioning to provide the good environment temperature and humidity conditions of 356*24H, so need to do reliability design to weak spot when designing Air-conditioner design.
In rack Design of Variable Frequence Air Conditioner, DC frequency-changing driver is generally all positioned on off-premises station, master controller is generally placed on indoor set, and the driver of off-premises station told start run signal, frequency signal by RS485 communication by master controller, drives the operation of compressor with this.This control mode reliability depends on the reliability of communication, but exactly this RS485 bus can face the risk of a lot of fault through outdoor wiring, e.g., and thunderbolt, communication robust or interference etc.When a fault has occurred, air-conditioning will be caused normally to freeze, and machine in-cabinet temperature may rise and damage equipment rapidly.
Thus prior art need to improve.
Summary of the invention
The technical problem to be solved in the present invention is, for the deficiencies in the prior art, there is provided a kind of communication fault-tolerant control method and air-conditioning system of air-conditioning system, to solve existing air-conditioning system when communication failure, the problem that air-conditioning normally cannot freeze and cause equipment within machine cabinet to damage.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is as follows:
A communication fault-tolerant control method for air-conditioning system, described air-conditioning system comprises indoor set and off-premises station, and indoor set intercoms by being connected order wire mutually with off-premises station, and wherein, described method comprises:
Detect the communication of described air-conditioning system connection order wire whether to interrupt;
When connecting order wire communicating interrupt, indoor set and off-premises station independently enter start-stop control model respectively, and indoor set exports according to the temperature of its control area and works to control signal for controlling off-premises station under predeterminated frequency;
Off-premises station receives described control information, and works according under the preset frequency of described start-stop control model.
The communication fault-tolerant control method of described air-conditioning system, wherein, described start-stop control model is that indoor set exports according to control area temperature signal the work that start-stop control signal controls off-premises station;
The communication fault-tolerant control method of described air-conditioning system, wherein, described indoor set according to the temperature of its control area export control signal control off-premises station work under predeterminated frequency into:
Described indoor set exports control signal according to the temperature signal of its control area and controls off-premises station and power on/and power-off controls off-premises station and works under predeterminated frequency;
Power on if described control signal controls off-premises station, then off-premises station is automatic with predeterminated frequency work after powering on;
If tester in power-down state outside described control information control room, then off-premises station power-off quitting work.
The communication fault-tolerant control method of described air-conditioning system, wherein, described indoor set exports control signal according to the temperature signal of its control area and controls off-premises station and power on/and power-off is:
Indoor set, according to its control area temperature signal, controls off-premises station and powers on/power-off by the open/close controlling to be arranged at contactor on off-premises station power line.
The communication fault-tolerant control method of described air-conditioning system, wherein, described indoor set according to the temperature of its control area export control information control off-premises station work under predeterminated frequency into:
The start-stop that described indoor set is exported by the control line arranged between indoor set and off-premises station according to the temperature of its control area controls signal to off-premises station;
Described off-premises station receives described control information, and when described control signal is ON signal, off-premises station works under predeterminated frequency; When described control signal is for stopping signal, then off-premises station quits work.
The communication fault-tolerant control method of described air-conditioning system, wherein, described when connect order wire communicating interrupt time also comprise:
Indoor set sends communication disruption warning message; And whether the communication of the described air-conditioning system connection of detection in real time order wire recovers, when communication recovery, indoor set enters frequency conversion communications control mode, and sends signal of communication to off-premises station by connecting order wire; Wherein, described frequency conversion communications control mode is that indoor set passes through to connect the work of order wire transmission signal of communication control off-premises station, and off-premises station is according to the signal of communication work received by connection order wire.
The communication fault-tolerant control method of described air-conditioning system, wherein, described off-premises station also comprise after receiving described control signal for:
When off-premises station receives described control information, described off-premises station detects its outdoor machine system running status in real time;
When outdoor machine system is normal, off-premises station works under predeterminated frequency according to described control signal;
When off-premises station detects its system jam, off-premises station quits work automatically.
The communication fault-tolerant control method of described air-conditioning system, wherein, describedly also to comprise when off-premises station powers on:
Off-premises station detects indoor set in real time by connecting the signal of communication of order wire transmitting-receiving; When the signal of communication by connecting order wire transmitting-receiving being detected, off-premises station enters frequency conversion communications control mode.
A kind of air-conditioning system, it comprises indoor set and off-premises station, and indoor set intercoms by being connected order wire mutually with off-premises station, wherein,
Described indoor set comprises: master controller;
Whether described master controller, connect order wire communication interrupt for detecting described air-conditioning system, and when connecting order wire communicating interrupt, controlling indoor set and entering start-stop control model, to power on/power-off according to control area temperature signal control off-premises station;
Described off-premises station comprises: frequency converter, contactor and compressor;
Described frequency converter is connected with compressor, for when connecting order wire communicating interrupt, controlling off-premises station and entering start-stop control model, and when off-premises station powers on, controls compressor and work under predeterminated frequency;
Described contactor is arranged on off-premises station power line, for/the power-off that powers on according to the outer machine of the On/Off signal control room of master controller.
A kind of air-conditioning system, it comprises indoor set and off-premises station, and indoor set intercoms by being connected order wire mutually with off-premises station, wherein, sets up start-stop control signal transmission line between described indoor set and off-premises station;
Described indoor set comprises: master controller;
Described master controller, whether interrupt for detecting the communication of described air-conditioning system connection order wire, and when connecting order wire communicating interrupt, controlling indoor set and entering start-stop control model, open/stop control information to off-premises station according to control area temperature signal by the transmission of start-stop control information transmission line;
Described off-premises station comprises: frequency converter and compressor;
Described frequency converter is connected with compressor, entering start-stop control model, receiving the control information that master controller sends for controlling off-premises station when connecting order wire communicating interrupt, and works under predeterminated frequency according to described control signal control compressor.
Beneficial effect: compared with prior art, the present invention put forward a kind of communication fault-tolerant control method and air-conditioning system of air-conditioning system, detect described air-conditioning system and connect order wire communication and whether interrupt; When connecting order wire communicating interrupt, indoor set to power on/power-off according to the outer machine of control area temperature-controlled chamber; When off-premises station powers on, off-premises station works under predeterminated frequency.This method is when there is abnormal interruption in RS485 bus communication, indoor set and off-premises station are entered start-stop control model simultaneously, according to rack refrigeration demand, powering on of off-premises station and power-off is realized by the open/close of control contactor, off-premises station is energized and at once controls the operation of compressor predeterminated frequency under start-stop control model, realizes unbroken function of freezing after communication failure.It provides the time solving fault not only to engineering staff after sale.Meanwhile, the reliability of operation of air conditioner is also increased.
Accompanying drawing explanation
Fig. 1 is the flow chart of the communication fault-tolerant control method preferred embodiment of air-conditioning system of the present invention.
Fig. 2 is the schematic diagram that the invention provides a kind of air-conditioning system preferred embodiment.
Fig. 3 is the schematic diagram that the invention provides another kind of air-conditioning system preferred embodiment.
Detailed description of the invention
The invention provides communication fault-tolerant control method and the air-conditioning system of air-conditioning system, for making object of the present invention, technical scheme and effect clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Below in conjunction with accompanying drawing, by the description to embodiment, summary of the invention is described further.
Refer to Fig. 1, the flow chart of the communication fault-tolerant control method preferred embodiment of air-conditioning system of the present invention.Described method is applied to air-conditioning system, and described air-conditioning system comprises indoor set and off-premises station, and indoor set intercoms by being connected order wire mutually with off-premises station; Described method comprises:
S100, detect described air-conditioning system and connect order wire communication and whether interrupt.
Particularly, described communication refers to the communication that indoor set is set up by being connected order wire with off-premises station; Indoor set sends the communication information to off-premises station by connecting order wire, and controls off-premises station work.Whether the communication of described detection described air-conditioning system connection order wire is interrupted to be detected by off-premises station and also can be detected by indoor set.In the present embodiment, indoor set is adopted to detect.That is, indoor set sends the communication information to the feedback signal detecting off-premises station during off-premises station, and predetermined having no time does not detect feedback information, then judge communication disruption.Here, the scheduled time can be different according to the environment for use difference of air-conditioning system, and do not do concrete restriction here, providing example is illustrated, e.g., and 2 seconds.
Further, described connection order wire can be RS485 bus, and indoor set is communicated by RS485 communication protocol with off-premises station.
S200, when connecting order wire communicating interrupt, indoor set and off-premises station independently enter start-stop control model respectively, and indoor set works to control signal for controlling off-premises station according to the output of the temperature of its control area under predeterminated frequency.
Particularly, connect order wire communicating interrupt to refer to indoor set and cannot pass through to be connected order wire with off-premises station and communicate.Now, start the timer arranging the scheduled time entering start-stop control model for controlling indoor set and off-premises station, when the timer expires, indoor set and off-premises station enter start-stop control model.Here, on indoor set and off-premises station, timer can be set respectively, and the identical time preset by two timers, thus when the timer expires, indoor set and off-premises station enter start-stop control model simultaneously, and indoor set sends according to its control area temperature information and works to control signal under predeterminated frequency for controlling off-premises station.Described start-stop control model refers to described start-stop control model to be indoor set according to control area temperature signal sends control information and controls off-premises station work; The control signal work of off-premises station indoor set.Here, the time of described two timer default settings can be 15 seconds, 20 seconds etc.
Further, described indoor set can be, but not limited to send control information according to control area temperature signal control off-premises station work, and it also can control off-premises station according to other control signal of pressure signal, degree of superheat signal etc. and to power on/power-off.For/the power-off that powers on according to temperature information control off-premises station, it can by arranging one for detecting the signal detection module of the temperature in Air-condition system control region on indoor set, when temperature exceedes preset temperature threshold value, indoor set sends the ON signal controlling off-premises station work; When temperature does not exceed temperature threshold, indoor set send control off-premises station work stop signal.Here temperature threshold is adjustable, and it is arranged at indoor set, and the region that can be used according to air-conditioning system by the remote controller that indoor set is corresponding is regulated the requirement of temperature, e.g., 20 degree, 25 degree etc.
In one embodiment, described indoor set can control off-premises station and power on by being arranged at contactor on off-premises station power line/power-off realizes the transmission of control signal.When contactor closes, control information is for opening, and off-premises station powers on preset frequency work, and when contactor is opened, control information is for closing, and off-premises station power-off quits work, and can control/the power-off that powers on of off-premises station so flexibly.Noticeable, described contactor is when air-conditioning system is by connecting order wire communication, and it is in closure state, makes switching on power of off-premises station.In actual applications, described contactor can, for being mechanical type switching device, can be electronic type, such as, and relay, solid-state relay etc.
In another embodiment, the start-stop that described indoor set is sent by the control line arranged between indoor set and off-premises station according to the temperature of its control area controls signal to off-premises station, and off-premises station works under predetermined power according to described control information.In actual applications, described indoor set is provided with 1 way switch control signal circuit, and off-premises station arranges 1 path switching signal and detects, and indoor set ON-OFF control circuit is connected by control line with the switching signal testing circuit of off-premises station.After both sides detect Communications failure, off-premises station by detection signal input port, when off-premises station detects ON signal, compressor runs with preset frequency, when detect stop signal time, stop compressor operating, realize the effect of redundancy.Notably, controlling off-premises station in the process of preset frequency work by start-stop control signal, off-premises station is in power-up state always.
Further, when connecting order wire communicating interrupt, indoor set also sends communication disruption warning message, reminds staff's air-conditioning system to break down.Described warning system can send chimes of doom by the alarm be arranged on indoor set and remind staff.Simultaneously, whether indoor set also detects described air-conditioning system communication in real time and recovers, when communication recovery, and send signal of communication to off-premises station by connecting order wire, wherein, described frequency conversion communications control mode is that indoor set passes through to connect the work of order wire transmission signal of communication control off-premises station, and off-premises station is according to the signal of communication work received by connection order wire.Meanwhile, off-premises station receives the signal of communication that indoor set sends by connecting order wire, then also enter frequency conversion communications control mode, indoor set communicates normally with off-premises station.Like this when fault-tolerant appears in communication, oneself can detect communication and whether recover normal, avoid the step of manual detection, improve the efficiency of maintenance.
S300, off-premises station receive described control information, and work according under the preset frequency of described start-stop control model.
Particularly, off-premises station is in start-stop control model, thus when off-premises station powers on, the off-premises station being in start-stop control model is started working automatically under predeterminated frequency.That is, off-premises station power on be exactly off-premises station with the signal of predeterminated frequency work, when off-premises station powers on, it just works under predeterminated frequency.
Further, when off-premises station powers on, off-premises station detects its system mode in real time, if off-premises station detects that system mode is normal, then automatic with preset frequency work; If the system failure of detecting, then automatically quit work.Off-premises station can be avoided like this to work in situation when there is the faults such as the too low alarm of low pressure, the too high alarm of high pressure or excessive discharge temperature alarm and the device failure problem caused.
Further, in the communications under disconnected state, the signal of communication that indoor set is sent by order wire can when off-premises station powers on, automatically be detected in real time; When signal of communication being detected, indoor set communicates with off-premises station normally, and indoor set and off-premises station enter frequency conversion communications control mode, recovers normally to work.
Present invention also offers a kind of air-conditioning system.As shown in Figure 2, described air-conditioning system comprises: indoor set 100 and off-premises station 200, and indoor set 100 intercoms by being connected order wire 300 mutually with off-premises station 200;
Described indoor set 100 comprises: master controller 101;
Whether described master controller 101, connect order wire communication interrupt for detecting described air-conditioning system, and when connecting order wire communicating interrupt, controlling indoor set 100 and entering start-stop control model, according to control area temperature-controlled chamber outward machine to power on/power-off;
Described off-premises station 200 comprises: frequency converter 201, contactor 203 and compressor 202;
Described frequency converter 201 is connected with compressor 202, for when connecting order wire communicating interrupt, controlling off-premises station 200 and entering start-stop control model, and when off-premises station 200 powers on, controls compressor 202 and work under predeterminated frequency;
Described contactor 203 is arranged on off-premises station power line 204, for/the power-off that powers on according to the On/Off signal control compressor 202 of master controller 101.
Further, described air-conditioning system, wherein, described indoor set 100 also comprises:
Temperature signal detection module, for detecting the temperature of indoor set control area.
Further, all right ALM detection module of described off-premises station, for when connecting order wire communication and being normal, described ALM information is also sent to indoor set by connecting order wire communication by acquisition system warning information in real time.Described indoor host computer does control logic according to described ALM information and judges, controls the normal refrigerating operaton of whole system with this; When connecting order wire communicating interrupt, when off-premises station powers on, off-premises station detects its system mode in real time, if off-premises station detects that system mode is normal, then automatic with preset frequency work; If the system failure of detecting, then automatically quit work.Off-premises station can be avoided like this to work in situation when there is the faults such as the too low alarm of low pressure, the too high alarm of high pressure or excessive discharge temperature alarm and the device failure problem caused.
In air-conditioning system provided by the invention; after the master controller 101 of described indoor set 100 powers on; control contactor 203 adhesive; electric current is after the frequency converter 201 that contactor 203 arrives off-premises station 200; after frequency converter 201 powers on; first the ALM of Gather and input, then waits for the reading of master controller 101 or the communication signal of write; Frequency converter 201 receives master controller 101 and sends communication signal by connecting order wire, the master controller 101 of indoor set 100 can establish a communications link with outdoor 200 machines by connecting order wire 300, master controller 101 and frequency converter 201 all enter frequency conversion communications control mode, the warning information that off-premises station 200 detects can be sent to indoor set by the real knowledge of communication, do control logic to judge, control the normal refrigerating operaton of whole system; When the master controller 101 of indoor set 100 cannot set up communication contact with off-premises station 200 by connecting order wire 300, continue after 15 seconds, master controller 101 and frequency converter 201 all enter start-stop control model, VFC exports to change into and controls to export according to the interval start-stop of control temperature by master controller 101, VFC exports and changes control system of switching on or off electricity output into by frequency converter 201, automatically exports control off-premises station with preset frequency and run after frequency converter 201 powers on.It is by when communication failure, indoor set 100 and off-premises station 200 are exported to be converted into by VFC and is exported by start-stop Schema control, indoor set 100 to power on/power-off according to the outer machine of control area temperature-controlled chamber, off-premises station by powering on/power-off controls the compressor operating of off-premises station, thus achieve when communication failure, air-conditioning system normally works, and solves existing air-conditioning system when communication failure, the problem that air-conditioning normally cannot freeze and cause equipment within machine cabinet to damage.
The invention also discloses a kind of air-conditioning system, as shown in Figure 3, it comprises indoor set 1 and off-premises station 2, and indoor set 1 intercoms by being connected order wire 3 mutually with off-premises station 2, wherein, sets up start-stop control signal transmission line 4 between described indoor set 1 and off-premises station 2;
Described indoor set 1 comprises: master controller 5;
Described master controller 5, whether interrupt for detecting the communication of described air-conditioning system connection order wire, and when connecting order wire communicating interrupt, controlling indoor set and entering start-stop control model, open/stop control information to off-premises station according to control area temperature signal by the transmission of start-stop control information transmission line;
Described off-premises station 2 comprises: frequency converter 6 and compressor 7;
Described frequency converter 6 is connected with compressor 7, start-stop control model is entered for controlling off-premises station when connecting order wire 3 communicating interrupt, receive the control information that master controller 1 is sent by start-stop control signal transmission line 4, and work under predeterminated frequency according to described control signal control compressor.
Further, described air-conditioning system, wherein, described indoor set 1 also comprises:
Temperature signal detection module, for detecting the temperature of indoor set control area.
Further, all right ALM detection module 8 of described off-premises station 2, for when connecting order wire 3 communication and being normal, described ALM information is also sent to indoor set 1 by connecting order wire communication by acquisition system warning information in real time.Described indoor set 1 does control logic according to described ALM information and judges, controls the normal refrigerating operaton of whole system with this; When connecting order wire communicating interrupt, when off-premises station powers on, off-premises station detects its system mode in real time, if off-premises station detects that system mode is normal, then automatic with preset frequency work; If the system failure of detecting, then automatically quit work.Off-premises station can be avoided like this to work in situation when there is the faults such as the too low alarm of low pressure, the too high alarm of high pressure or excessive discharge temperature alarm and the device failure problem caused.
In air-conditioning system provided by the invention, after the master controller 5 of described indoor set 1 powers on and off-premises station 2 frequency converter 6 powers on, the first ALM of Gather and input, then waits for the reading of master controller 5 or the communication signal of write; Frequency converter 6 receives master controller 5 and sends communication signal by connecting order wire 3, the master controller 5 of indoor set 1 can establish a communications link with outdoor 2 machines by connecting order wire 3, master controller 5 and frequency converter 6 all enter frequency conversion communications control mode, the warning information that off-premises station 2 detects can be sent to indoor set 1 by the real knowledge of communication, do control logic to judge, control the normal refrigerating operaton of whole system; When the master controller 5 of indoor set 1 cannot set up communication contact with off-premises station 2 by connecting order wire 3, continue after 15 seconds, master controller 5 and frequency converter 6 all enter start-stop control model, VFC exports to change into and controls to export according to the interval start-stop of control temperature by master controller 5, and frequency converter 6 changes VFC output into start-stop and controls to export.Frequency converter 6 detects the start-stop control signal that master controller 5 is sent by start-stop control signal transmission line in real time, automatically controls off-premises station with preset frequency output run when frequency converter 201 detects ON signal.It is by when communication failure, indoor set 1 and off-premises station 2 are exported to be converted into by VFC and is exported by start-stop Schema control, indoor set 1 sends start-stop according to control area temperature signal and controls signal to off-premises station 2, the compressor 7 that off-premises station 2 controls off-premises station according to described start-stop control information works, thus achieve when communication failure, air-conditioning system normally works, and solves existing air-conditioning system when communication failure, the problem that air-conditioning normally cannot freeze and cause equipment within machine cabinet to damage.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection domain that all should belong to the claim appended by the present invention.
Claims (10)
1. a communication fault-tolerant control method for air-conditioning system, described air-conditioning system comprises indoor set and off-premises station, and indoor set intercoms by being connected order wire mutually with off-premises station, and it is characterized in that, described method comprises:
Detect the communication of described air-conditioning system connection order wire whether to interrupt;
When connecting order wire communicating interrupt, indoor set and off-premises station independently enter start-stop control model respectively, and indoor set exports according to the temperature of its control area and works to control signal for controlling off-premises station under predeterminated frequency;
Off-premises station receives described control information, and works according under the preset frequency of described start-stop control model.
2. the communication fault-tolerant control method of air-conditioning system according to claim 1, is characterized in that, described start-stop control model is that indoor set exports according to control area temperature signal the work that start-stop control signal controls off-premises station.
3. the communication fault-tolerant control method of air-conditioning system according to claim 1, is characterized in that, described indoor set according to the temperature of its control area export control signal control off-premises station work under predeterminated frequency into:
Described indoor set exports control signal according to the temperature signal of its control area and controls off-premises station and power on/and power-off controls off-premises station and works under predeterminated frequency;
Power on if described control signal controls off-premises station, then off-premises station is automatic with predeterminated frequency work after powering on;
If tester in power-down state outside described control information control room, then off-premises station power-off quitting work.
4. the communication fault-tolerant control method of air-conditioning system according to claim 3, is characterized in that, and described indoor set exports control signal according to the temperature signal of its control area and controls off-premises station and power on/and power-off is:
Indoor set, according to its control area temperature signal, controls off-premises station and powers on/power-off by the open/close controlling to be arranged at contactor on off-premises station power line.
5. the communication fault-tolerant control method of air-conditioning system according to claim 1, is characterized in that, described indoor set according to the temperature of its control area export control information control off-premises station work under predeterminated frequency into:
The start-stop that described indoor set is exported by the control line arranged between indoor set and off-premises station according to the temperature of its control area controls signal to off-premises station;
Described off-premises station receives described control information, and when described control signal is ON signal, off-premises station works under predeterminated frequency; When described control signal is for stopping signal, then off-premises station quits work.
6. the communication fault-tolerant control method of air-conditioning system according to claim 1, is characterized in that, describedly also comprises when connecting order wire communicating interrupt:
Indoor set sends communication disruption warning message; And whether the communication of the described air-conditioning system connection of detection in real time order wire recovers, when communication recovery, indoor set enters frequency conversion communications control mode, and sends signal of communication to off-premises station by connecting order wire; Wherein, described frequency conversion communications control mode is that indoor set passes through to connect the work of order wire transmission signal of communication control off-premises station, and off-premises station is according to the signal of communication work received by connection order wire.
7. the communication fault-tolerant control method of air-conditioning system according to claim 1, is characterized in that, described off-premises station also comprise after receiving described control signal for:
When off-premises station receives described control information, described off-premises station detects its outdoor machine system running status in real time;
When outdoor machine system is normal, off-premises station works under predeterminated frequency according to described control signal;
When off-premises station detects its system jam, off-premises station quits work automatically.
8. the communication fault-tolerant control method of air-conditioning system according to claim 1, is characterized in that, describedly also comprises when off-premises station powers on:
Off-premises station detects indoor set in real time by connecting the signal of communication of order wire transmitting-receiving; When the signal of communication by connecting order wire transmitting-receiving being detected, off-premises station enters frequency conversion communications control mode.
9. an air-conditioning system, it comprises indoor set and off-premises station, and indoor set intercoms by being connected order wire mutually with off-premises station, it is characterized in that,
Described indoor set comprises: master controller;
Whether described master controller, connect order wire communication interrupt for detecting described air-conditioning system, and when connecting order wire communicating interrupt, controlling indoor set and entering start-stop control model, to power on/power-off according to control area temperature signal control off-premises station;
Described off-premises station comprises: frequency converter, contactor and compressor;
Described frequency converter is connected with compressor, for when connecting order wire communicating interrupt, controlling off-premises station and entering start-stop control model, and when off-premises station powers on, controls compressor and work under predeterminated frequency;
Described contactor is arranged on off-premises station power line, for/the power-off that powers on according to the outer machine of the On/Off signal control room of master controller.
10. an air-conditioning system, it comprises indoor set and off-premises station, and indoor set intercoms by being connected order wire mutually with off-premises station, it is characterized in that, sets up start-stop control signal transmission line between described indoor set and off-premises station;
Described indoor set comprises: master controller;
Described master controller, whether interrupt for detecting the communication of described air-conditioning system connection order wire, and when connecting order wire communicating interrupt, controlling indoor set and entering start-stop control model, open/stop control information to off-premises station according to control area temperature signal by the transmission of start-stop control information transmission line;
Described off-premises station comprises: frequency converter and compressor;
Described frequency converter is connected with compressor, entering start-stop control model, receiving the control information that master controller sends for controlling off-premises station when connecting order wire communicating interrupt, and works under predeterminated frequency according to described control signal control compressor.
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