CN104279719B - Air conditioning system and communication method thereof - Google Patents
Air conditioning system and communication method thereof Download PDFInfo
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- CN104279719B CN104279719B CN201310275836.8A CN201310275836A CN104279719B CN 104279719 B CN104279719 B CN 104279719B CN 201310275836 A CN201310275836 A CN 201310275836A CN 104279719 B CN104279719 B CN 104279719B
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Classifications
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
-
- 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
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Selective Calling Equipment (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses an air conditioning system and a communication method of the air conditioning system. The air conditioning system comprises an indoor unit and an outdoor unit. The indoor unit comprises a first wireless communication module. The outdoor unit comprises a second wireless communication module. The second wireless communication module is in communication with the first wireless communication module. One of the indoor unit and the outdoor unit is a host. The other one of the indoor unit and the outdoor unit is a slave. The host and the slave complete handshake through one of at least one shared channel. One of multiple work channels is selected by the host to be used as the work channel between the host and the slave, the work channel is transmitted to the slave from one of the shared channel, and therefore the host and the slave conduct communication through the selected work channel. By the adoption of the air conditioning system and a communication method of the air conditioning system, wireless communication between the indoor unit and the outdoor unit of the air conditioner is achieved, the problems that when wire communication is adopted, efficiency is low, the fault rate is high, and energy is wasted are solved, and the problem of channel disturbance caused during wireless communication is also solved.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of air conditioning system and a kind of communication means of air conditioning system.
Background technology
At present, air-conditioning indoor and outdoor machine is most of by wired connection, as shown in figure 1, indoor apparatus of air conditioner and air-conditioner outdoor unit
Wired connection is carried out by power line and order wire, and in order to save connecting line, by Signal averaging the zero of AC power cord
On line.In order to realize that alternating current-direct current is isolated, it is necessary to using high pressure optocoupler.And power pack be by alternating voltage resistance-capacitance depressurization, it is right
The resistance to pressure request of part is higher, causes meaningless heat loss, wastes the energy.In installation process, it is desirable to live wire, zero line, ground wire,
Holding wire accurately connects so that installation effectiveness is low, and if wiring error, circuit block can be caused to damage, and fault rate is high.
Additionally, existing some air-conditionings then adopt radio communication, certain channel communication of certain wave band is fixed on.But,
Existing problems are：When this channel is disturbed, air-conditioning just cannot communicate.And same class product generally selects same
Individual channel communication, when the user for nearby using like products is more, mutually conflict can be also produced between air-conditioning, existed wireless
, that is, there is the channel interference problem of radio communication in the channel occupancy problem of communication.
The content of the invention
The purpose of the present invention is intended at least solve above-mentioned technical problem to a certain extent.
For this purpose, it is an object of the present invention to propose a kind of air conditioning system so that air-conditioning indoor and outdoor machine carries out channel radio
Letter, to substitute wire communication, so as to be prevented effectively from that the efficiency that causes because of wire communication is low, fault rate is high, energy waste etc. asks
Topic.And installation process can be simplified, it is to avoid wiring error, the channel interference problem of radio communication can also be solved.
Further object is that proposing a kind of communication means of air conditioning system.
To reach above-mentioned purpose, the air conditioning system that one aspect of the present invention embodiment is proposed, including：Indoor set, wherein, it is described
Indoor set includes：Interior machine main control module；The first wireless communication module being connected with the interior machine main control module, described first is wireless
Communication module has at least one common signal channel and multiple working channels；Off-premises station, wherein, the off-premises station includes：Outer owner
Control module；And the second wireless communication module being connected with the outer machine main control module, second wireless communication module and institute
State the intercommunication of the first wireless communication module, second wireless communication module have at least one common signal channel and
Multiple working channels；Wherein, in the indoor set and the off-premises station one be main frame, in the indoor set and the off-premises station
Another be slave, complete to shake hands by least one common signal channel between the main frame and slave, and
And the main frame selects one as the working channel between the main frame and slave and passes through from the plurality of working channel
One at least one common signal channel is sent to the slave, so that by the work of selection between the main frame and slave
Communicated as channel.
The air conditioning system for proposing according to embodiments of the present invention, can realize that air-conditioning indoor and outdoor machine carries out radio communication, to replace
For wire communication, so as to be prevented effectively from that the efficiency that causes because of wire communication is low, fault rate is high, energy waste the problems such as, and
Installation process can be simplified, it is to avoid wiring error, can be with the channel interference problem of effectively solving radio communication.
In one embodiment of the invention, at least one common signal channel is multiple, between the main frame and slave
Shaken hands by many common signal channel frequency hopping Handshake Protocols.
In one embodiment of the invention, the work of first wireless communication module and the second wireless communication module is carried
Ripple wave band can be 433MHz, and communication baud rate is in the 19200-55000bits/ seconds.
In one embodiment of the invention, the main frame selects a broadcast to shake hands and invite in the plurality of common signal channel
Please signal, slave search common signal channel simultaneously returns handshake response signal according to the invitation signal of shaking hands to the main frame,
To complete shaking hands between the main frame and slave.
In one embodiment of the invention, the plurality of common signal channel is evenly distributed in the operating carriers wave band
It is interior.
In one embodiment of the invention, the occupancy that the main frame is additionally operable to the common signal channel for judging the selection is
It is no to be less than the first predetermined threshold value, and if it is not, then select to be shaken hands described in a broadcast in the plurality of common signal channel again
Invitation signal, until the occupancy of the common signal channel of the selection is less than first predetermined threshold value.
In one embodiment of the invention, the occupancy that the main frame is additionally operable to the working channel for judging the selection is
It is no to be less than the second predetermined threshold value, and if it is not, then select one as the main frame from the plurality of working channel again and
Working channel between slave, until the occupancy of the working channel of the selection is less than second predetermined threshold value.
In one embodiment of the invention, the invitation signal of shaking hands has the work that the main frame is that the slave is selected
Make the identification information of channel and the main frame, the handshake response signal has the working channel of the selection and the slave
Identification information.
In one embodiment of the invention, the working channel between the main frame and slave using the selection passes through institute
State the first wireless communication module and the second wireless communication module enters the transmission that line command sends information and command response message.
In one embodiment of the invention, the order transmission information includes that the identification information of the main frame and order are sent out
Content, the command response message is sent to include the identification information and command response content of the slave.
In one embodiment of the invention, first wireless communication module includes the first modulation /demodulation module, described
Second wireless communication module includes the second modulation /demodulation module.
In one embodiment of the invention, first wireless communication module also includes the first control module, described the
Two wireless communication modules also include the second control module.
To reach above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of communication means of air conditioning system, described
Air conditioning system includes main frame and slave, is wirelessly communicated between the main frame and slave, the main frame and slave
With at least one common signal channel and multiple working channels, described communication means comprises the steps：
S1, the main frame sends invitation letter of shaking hands by least one common signal channel to the slave
Number, wherein, the invitation signal of shaking hands has the mark of the working channel that the main frame is the slave selection and the main frame
Information；
S2, the slave search common signal channel simultaneously returns handshake response letter according to the invitation signal of shaking hands to the main frame
Number, wherein, the handshake response signal has the working channel of the selection and the identification information of the slave；
S3, the main frame sends order transmission information by the working channel of the selection to the slave；
S4, the slave after processing the order transmission information, by the working channel of the selection to institute
State main frame feedback command response message.
The communication means of the air conditioning system for proposing according to embodiments of the present invention, using master-slave communication mode channel radio is carried out
Letter, by the suitable common signal channel of Selection of chiller and working channel, realizes that main frame and slave carry out radio communication, and the present invention can
To realize the time-sharing multiplex of multiple working channels.Additionally, the communication means is simple, reliable.
In one embodiment of the invention, at least one common signal channel is multiple, between the main frame and slave
Shaken hands by many common signal channel frequency hopping Handshake Protocols.
In one embodiment of the invention, in step S1, the main frame is selected in the plurality of common signal channel
Select one and broadcast invitation signal of shaking hands, in step S2, the slave searches for the common signal channel of the selection and according to institute
State invitation signal of shaking hands and return handshake response signal to the main frame, to complete shaking hands between the main frame and slave.
In one embodiment of the invention, step S1 also includes：
Whether the main frame judges the occupancy of the common signal channel of the selection less than the first predetermined threshold value；
If it is not, then selecting invitation signal of shaking hands described in a broadcast, Zhi Daosuo in the plurality of common signal channel again
The occupancy for stating the common signal channel of selection is less than first predetermined threshold value.
In one embodiment of the invention, before step S1, the communication means of described air conditioning system is also wrapped
Include：
The main frame selects one as the working channel between the main frame and slave from the plurality of working channel；
Whether the main frame judges the occupancy of the working channel of the selection less than the second predetermined threshold value；
If it is not, then selecting one to believe as the work between the main frame and slave from the plurality of working channel again
Road, until the occupancy of the working channel of the selection is less than second predetermined threshold value.
In one embodiment of the invention, the order transmission information includes that the identification information of the main frame and order are sent out
Content, the command response message is sent to include the identification information and command response content of the slave.
The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments
It is substantially and easy to understand, wherein：
Fig. 1 is the air-conditioning mounting structure schematic diagram of wire communication；
Fig. 2 is the mounting structure schematic diagram of the air conditioning system proposed according to one embodiment of the invention；
Fig. 3 is the connection diagram between each part of the air conditioning system of the present invention；
Fig. 4 is the schematic diagram of the communication mode of the air conditioning system of a specific embodiment of the invention；
Fig. 5 is the schematic diagram of the communication sequence of the air conditioning system of a specific embodiment of the invention；
Fig. 6 is the first wireless communication module of one embodiment of the invention and the structural representation of the second wireless communication module
Figure；
Fig. 7 is the first wireless communication module of another embodiment of the present invention and the structural representation of the second wireless communication module
Figure；And
Fig. 8 is the flow chart of the communication means of the air conditioning system proposed according to the embodiment of the present invention.
Reference：
Indoor set 100, off-premises station 200, interior machine main control module 10, the first wireless communication module 20, outer machine main control module 30,
Second wireless communication module 40, the first modulation /demodulation module 21, the first control module 22, the second modulation /demodulation module 41, second
Control module 42.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or more,
Unless otherwise expressly limited specifically.
In describing the invention, it should be noted that unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connected or electrical connection, or the connection of two element internals, can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
With reference to explained below and accompanying drawing, it will be clear that these and other aspects of embodiments of the invention.In these descriptions
In accompanying drawing, specifically disclose some particular implementations in embodiments of the invention to represent the enforcement for implementing the present invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.Conversely, the present invention
Embodiment includes all changes, modification and the equivalent fallen in the range of the spirit and intension of attached claims.
The air conditioning system and its communication means for proposing to the embodiment of the present invention with reference to the accompanying drawings is described.
The air conditioning system that the embodiment of the present invention is proposed is described first.Fig. 2 is to be proposed according to the embodiment of the present invention
The mounting structure schematic diagram of air conditioning system, Fig. 3 is the connection diagram between each part of air conditioning system.
As shown in Figures 2 and 3, the air conditioning system that the embodiment of the present invention is proposed includes indoor set 100 and off-premises station 200.Its
In, indoor set 100 includes the first wireless communication module 20 that interior machine main control module 10 is connected with interior machine main control module 10, the first nothing
Line communication module 20 has at least one common signal channel and multiple working channels；Off-premises station 200 include outer machine main control module 30 with
And the second wireless communication module 40 being connected with outer machine main control module 30, the second wireless communication module 40 and the first radio communication mold
The intercommunication of block 20, the second wireless communication module 40 has at least one common signal channel and multiple working channels.Wherein, room
In interior machine 100 and off-premises station 200 one be main frame, in indoor set 100 and off-premises station 200 another be slave, main frame and from
Complete to shake hands by least one common signal channel between machine, and main frame selects a work from multiple working channels
Send to slave for the working channel between main frame and slave and by least one common signal channel so that main frame and
Communicated by the working channel of selection between slave.
In embodiments of the present invention, it is assembled with a radio communication in the indoor set 100 and off-premises station 200 of air conditioning system
Module is respectively the first wireless communication module 20 and the second wireless communication module 40, and indoor set 100 and off-premises station 200 only need to handle
Order is sent to respective wireless communication module, order is sent by wireless communication module, again by radio communication mold
Block realizes the reception of order, and wireless communication module is sent to indoor set 100 and off-premises station 200 decoded order.
In an embodiment of the present invention, before main frame and slave communicate, it is necessary to be attached in common signal channel, this connection
Referred to as " shake hands ".Wherein, in one embodiment of the invention, at least one common signal channel is multiple, between main frame and slave
Shaken hands by many common signal channel frequency hopping Handshake Protocols.
It is understood that carrying out by the first wireless communication module 20 and the second wireless communication module in main frame and slave
40 when carrying out radio communication, carrier band, channel, power level, baud rate selection it is extremely important.
Specifically, indoor set 100 is installed indoors, and off-premises station 200 is installed outdoors, the He of the first wireless communication module 20
Second wireless communication module 40 is separately mounted to indoor set 100 and off-premises station 200, has a water blockoff mud wall between the two, due to cold
The restriction of matchmaker's pipeline, indoor set 100 is with off-premises station 200 apart from typically less than 5 meters.Therefore, wireless carrier of the invention requirement can
To penetrate the cement wall of stifled 30 cm thicks, and the casing of indoor set 100 and off-premises station 200, and can be normal in 5 meters
Communication, and fewer is disturbed to other equipment.Because baud rate is interfered the energy of communication distance, penetration power, adjacent channel
All have an impact：Under identical transmission power, baud rate is higher, and communication distance is shorter, and penetration power is weaker, and adjacent-channel interference is got over
It is few.Through experiment, the optimal baud rate for obtaining the wireless carrier satisfaction requirement of 433MHz is the 38400bits/ seconds.When baud rate is
When 76800bits/ seconds, it is impossible to penetrate the cement wall of stifled 30 cm thicks；It is adjacent when baud rate is 19200bits/ seconds
Channel can interfere, be only spaced a channel, such as 1 and 3 channels communicate simultaneously, just do not result in interference, but can
Reduced with channel quantity.
Therefore, in one embodiment of the invention, the first wireless communication module 20 and the second wireless communication module 40
Operating carriers wave band is 433MHz, and communication baud rate is in the 19200-55000bits/ seconds.Say, the 19200-55000bits/ seconds
All it is the suitable baud rate of the present invention.Preferably, communication baud rate can be the 38400bits/ seconds.
In an embodiment of the present invention, the intercommunication of the first wireless communication module 20 and the second wireless communication module 40
A wave band is taken, there are multiple communication channels in wave band, wherein M is appointed as common signal channel.Preferably, at one of the present invention
In embodiment, multiple common signal channels are evenly distributed in operating carriers wave band, i.e., multiple common signal channels are evenly distributed in
In the operating carriers wave band of 433MHz.As a result, common signal channel is reasonably distributed, in order to when certain common signal channel is subject to
Interference, also other common signal channels can be used, so as to improve capacity of resisting disturbance.
In one particular embodiment of the present invention, as shown in figure 4, indoor set 100 is wireless by first with off-premises station 200
The wireless communication module 40 of communication module 20 and second carries out twireless radio-frequency communication, and twireless radio-frequency communication carrier frequency is 433MHz,
Communication baud rate：38400, there are 256 channels, common channels 0,1,255 this 3 channels are prohibitted the use of, and are prevented and other radio frequencies
Device conflict.40th, used as using common signal channel, other 248 channels are used as order for 80,120,160,200 etc. 5 channels
It is working channel that frame sends channel.In the present embodiment, there are 5 common signal channels：40th, 80,120,160,200, it is uniformly distributed, base
This not there is a possibility that only also common signal channel can be used, and air-conditioning just can be entered by common signal channel while disturbed
Capable connection of shaking hands.
It should be noted that the twireless radio-frequency communication agreement of the present invention is as follows：
Handshake frames：Communication baud rate：38400, per 10 bytes of frame, practical communication time：3.3ms, when reserving appropriate
Between gap, it is stipulated that per frame take 5ms, support 200 frame traffics each second.Frame format：First code（AAh）, product coding（7 words
Section）, command frame busy channel（1 byte）, verification and（1 byte）.As shown in table 1.
Table 1
| First code | Product coding | Channel（Command frame） | Verification and |
| AAh | xxh、xxh、xxh、xxh、xxh、xxh、xxh | xxh、 | xxh、 |
| 1 byte | 7 bytes | 1 byte | 1 byte |
Command frame：Communication baud rate：38400, per 30 bytes of frame, practical communication time：10ms, reserves reasonable time
Gap, it is stipulated that 20ms is taken per frame, 50 frame traffics are supported each second.Frame format：First code（AAh）, product coding（7 words
Section）, command word（18 bytes）, verification and（1 byte）, it is concrete as shown in table 2.
Table 2
| First code | Product coding | Command word | Verification and |
| AAh | xxh、xxh、xxh、xxh、xxh、xxh、xxh | xxh、 | xxh、 |
| 1 byte | 7 bytes | 18 bytes | 1 byte |
Wherein, command frame acquiescence goes to respective channels and sends command frame after handshake frames send after 10ms.
It should be noted that handshake frames must include most basic content：Identity, command frame send channel.In order to
Reliable communication typically also includes first code, tail code, sequence number, verification etc..Command frame is more flexible, can freely define.Generally comprise
There are first code, identity, sequence number, command context, verification, tail code etc..Wherein identity and command context are necessary.
Wherein, identity：Can be the identity of sender, or the identity of recipient, or a group
The identity of body, recipient can decide whether to receive this information according to the content of identification identity.Command frame sends letter
Road：Show the channel number that next will be communicated, prohibit the use of common signal channel.Command frame sends channel and is selected by main frame
Select.System of selection can be random, or certain algorithm.Command context：Indoor and outdoor machine and the first wireless communication module 20,
The Content of Communication of the second wireless communication module 40.
First wireless communication module 20 and the second wireless communication module 40 are receiving correct indoor set 100 and off-premises station
After 200 order, need to be formatted as command frame order, need to increase first code, identity, sequence number, verification, tail code
Deng wherein identity is necessary, because in a channel, it is possible to have 1 air-conditioning incessantly in communication, it is necessary to by body
Part mark is identified.First wireless communication module 20 and the second wireless communication module 40 are needed after correct command frame is received
The command context inside command frame is extracted, indoor set 100 and off-premises station 200 is then sent to.
Before first wireless communication module 20 and the second wireless communication module 40 are in communication with each other, it is necessary in specified public letter
Road is attached, and this connection referred to as " is shaken hands ", and after success of shaking hands, the command frame for proceeding to application of shaking hands sends channel and works letter
Road carries out radio communication to send command information.Repeatedly after command communication failure, return common signal channel is re-started shakes hands.By
The communication mode adopted in the present invention is master-slave communication mode, and by main frame working channel is determined.Wherein, main frame can be indoor set
100, or off-premises station 200.
In one embodiment of the invention, main frame selects one to broadcast invitation signal of shaking hands in multiple common signal channels,
Slave search common signal channel simultaneously returns handshake response signal according to invitation signal of shaking hands to main frame, to complete between main frame and slave
Shake hands.Specifically, a common signal channel in order is selected in multiple common signal channels by main frame, main frame is public
Channel initiates to shake hands invitations, slave search common signal channel, receives to be replied after invitation and invites, and sets up and connects, that is, complete main frame and from
Shaking hands between machine.Wherein, in one embodiment of the invention, invitation signal of shaking hands has main frame for the work of slave selection
The identification information of channel and main frame, handshake response signal has the identification information of selectable working channel and slave.
Wherein, in one embodiment of the invention, whether main frame is additionally operable to judge the occupancy of the common signal channel of selection
Less than the first predetermined threshold value, and if it is not, then select a broadcast to shake hands invitation signal in multiple common signal channels again, directly
Occupancy to the common signal channel of selection is less than the first predetermined threshold value.Specifically, the first predetermined threshold value can be 70%, also
It is to say, main frame randomly chooses a common signal channel, whether judges the common signal channel of selection less than 70%, if being unsatisfactory for condition,
A common signal channel is reselected, the occupancy of the common signal channel of selection is judged again, until the occupancy of the common signal channel of selection
Rate is less than 70%, meets condition.
It is understood that in an embodiment of the present invention, the indoor set 100 of air conditioning system and the communication of off-premises station 200
Before, in order one is selected in multiple working channels as the working channel between main frame and slave by main frame, and
Sent to slave by the common signal channel for selecting, then both sides proceed to working channel, to send command information, carry out channel radio
Letter.Therefore, in one embodiment of the invention, whether main frame is additionally operable to judge the occupancy of the working channel of selection less than the
Two predetermined threshold values, and if it is not, then select one to believe as the work between main frame and slave from multiple working channels again
Road, until the occupancy of the working channel for selecting is less than the second predetermined threshold value.Wherein, the second predetermined threshold value can be 30%.Also
It is to say, main frame randomly chooses a working channel, whether judges the working channel of selection less than 30%, if being unsatisfactory for condition,
A working channel is reselected, the occupancy of the working channel of selection is judged again, until the occupancy of the working channel of selection
Rate is less than 30%, meets condition.
Further, in one embodiment of the invention, the working channel between main frame and slave using selection passes through
First wireless communication module 20 and the second wireless communication module 40 enter the transmission that line command sends information and command response message.Its
In, order transmission information includes the identification information and order transmission content of main frame, and command response message includes that the mark of slave is believed
Breath and command response content.
In one particular embodiment of the present invention, main frame is indoor set 100, and slave is off-premises station 200, as shown in figure 5,
Communication sequence is specially：
1st, common signal channel is estimated, finds suitable common signal channel；
Specifically, main frame randomly chooses a common signal channel, whether the common signal channel of selection is judged less than 70%, if not
Meet condition, then reselect a common signal channel, the occupancy of the common signal channel of selection is judged again, it is public until what is selected
The occupancy of channel is less than 70%, meets condition.
2nd, working channel is estimated, finds suitable working channel；
Specifically, main frame randomly chooses a working channel, whether the working channel of selection is judged less than 30%, if not
Meet condition, then reselect a working channel, the occupancy of the working channel of selection is judged again, until the work for selecting
The occupancy of channel is less than 30%, meets condition.
3rd, the first wireless communication module 20 of main frame sends invitation signal of shaking hands in common signal channel；
4th, the search common signal channel of the second wireless communication module 40 of slave, after finding to invite, replys at once response；
5th, main frame and slave all adjust the working channel that communication channel is selection；
6th, the automatically controlled i.e. interior machine main control module 10 of main frame issues the first wireless communication module 20 order；
7th, the first wireless communication module 20 order according to formatted and by the channel of agreement of shaking hands（Select
Working channel）Send；
8th, the second wireless communication module 40 receives the order of formatting in the channel of agreement of shaking hands；
9th, the order that the verification of the second wireless communication module 40 is received, and order reduction, it is sent to slave；
10th, slave receives order and processes, and result is sent to the second wireless communication module 40；
11st, channel of second wireless communication module 40 order according to formatted and by agreement of shaking hands sends out
Go；
12nd, the first wireless communication module 20 receives the order of formatting in the channel of agreement of shaking hands；
13rd, the order that the verification of the first wireless communication module 20 is received, and order reduction, it is sent to main frame.Thus
Complete and once communicate.
Repeat said process 1-13.If it should be noted that main frame do not receive commands in return, order mistake or on
It is, for example, not complete for 3 seconds that process is stated more than Preset Time, then be judged to communication failure.Return course 6 restarts after repeatedly failure,
For example fail after 5 communication failures, return course 1 restarts.When all not communicating successful within continuous 5 minutes, report communication event
Barrier.It is pointed out that to the channel using time-sharing multiplexing technology, the occupancy of channel is lower, and the chance of conflict is fewer, communication
It is safer.
In addition, using many common signal channel frequency hopping Handshake Protocols, strong antijamming capability, either common signal channel still work letter
Road, after receiving interference, can automatically jump to suitable channel and initiate connection of shaking hands again, recommunicate.Due to common signal channel and work
Make channel distribution uniform, unless all band receives interference, otherwise there is no situation about can not communicate.
The reason for anti-dry ability of the agreement for adopting to the present invention below is strong is made a concrete analysis of：
1）There are enough working channels.Communicated using optimal baud rate 38400, communication when clear is intercepted
Distance is 15 meters, penetrates 7 meters of the cement wall and distance of stifled 30 cm thicks and can communicate.In modern architecture, story height
For 3.3 meters, 33 meters of the height of upper and lower 10 floor, even if in density highest dormitory building exterior wall, also can not in 30 meters of left and right distance
There can be 10 rooms.I.e.：In density highest dormitory building exterior wall, do not exist in the range of 15 meters of radius while having outside 100 air-conditionings
The probability that machine is present.Even so every air-conditioning takes a working channel, in an embodiment of the present invention, 248 works
Making channel can also meet requirement.Even if part working channel is interfered, remaining working channel also be enough to enough.If adopted
Communicated with baud rate 19200, then there are 128 channels to use.
2）Common signal channel is reasonably distributed.Multiple common signal channels, in being evenly distributed on whole wave band, in order to when certain
Common signal channel is interfered, and also other common signal channels can be used.In an embodiment of the present invention, there are 5 common signal channels：
40、80、120、160、200.It is uniformly distributed, is substantially not present simultaneously disturbed probability, only also common signal channel can be with
Use, air-conditioning just can carry out connection of shaking hands by common signal channel.
3）Handshake frames, command frame holding time are short, and the probability of success communication is big.Specifically, radio wave interference reason
Analysis：When only one of which radio wave in channel, recipient can be properly received this radio wave；When same in channel
When exist two radio waves（A and B, and the signal intensity of B is more than A）When, the strong nothing of recipient's preferential receipt signal
Line electric wave.As a result, if A is only the radio wave for needing to receive, for A, B is interference signal, but recipient
The strong radio wave B of preferential receipt signal, so A is disturbed, communication failure.In order to avoid air-conditioning sending signal it is disturbed,
Preferably select channel idle when occur to send A when radio wave, i.e. B do not send.It is not that when B sends
Can predict, can only select channel idle condition that radio wave A properly just occurs.If at the end of the free time, i.e. B starts to send
When, radio wave A sends and does not still complete, and radio wave A is possible to destroyed.So longer radio wave, is destroyed
Probability it is bigger；Shorter radio wave, the probability of success communication is bigger.In the case of Content of Communication identical, baud rate is got over
Height, takes shorter.So selecting the baud rate 38400 for meeting requirement to communicate in an embodiment of the present invention, handshake frames are actual logical
The letter time：3.3ms, command frame practical communication time：10ms.This is selected than selecting the baud rates such as baud rate 19200,9600
It is good.
Additionally, in an embodiment of the present invention, as shown in Fig. 2 the attaching plug of indoor set 100 and off-premises station 200 is all
Three insert, with live wire, zero line, ground wire, attaching plug is typically chosen hithermost supply socket and is powered, wherein, live wire, zero line
Without strict differentiation.In the connection of power supply, live wire and zero line is reversed does not also result in problem can with prioritizing selection most nearby
Supply socket connection, it is also possible to according to original connected mode wiring, thus, it is possible to simplify installation process, it is to avoid wiring is wrong
By mistake, efficiency is improved.
The air conditioning system for proposing according to embodiments of the present invention, can realize that air-conditioning indoor and outdoor machine carries out radio communication, to replace
For wire communication, so as to be prevented effectively from that the efficiency that causes because of wire communication is low, fault rate is high, energy waste the problems such as, and
Installation process can be simplified, it is to avoid wiring error, can be with the channel interference problem of effectively solving radio communication.
It should be noted that in an embodiment of the present invention, the channel radio of interior machine main control module 10 and first of indoor set 100
It is wired UART between letter module 20（Universal Asynchronous Receiver/Transmitter, it is universal asynchronous
Reception/dispensing device）Serial communication, outer machine main control module 30 and second wireless communication module 40 of off-premises station 200 are also wired
UART serial communications, serial communication baud rate be the 1200BPS/ seconds.
The first wireless communication module 20 and second that embodiment of the present invention proposition is described referring to Fig. 6 and Fig. 7 is wireless
Communication module 40.
In one embodiment of the invention, as shown in fig. 6, the first wireless communication module 20 includes the first modulatedemodulate mode transfer
Block 21, the second wireless communication module 40 includes the second modulation /demodulation module 41.
In an embodiment of the present invention, the first wireless communication module 20 and the structure of the second wireless communication module 40 are simpler
Single, cost is relatively low, but requires the interface and the first modulation /demodulation module 21 of the interior machine main control module 10 of original indoor set 100
Interface compatibility, it is desirable to the interface of outer machine main control module 30 of original off-premises station 200 and connecing for the second modulation /demodulation module 41
Mouth is compatible.Because the channel shared by radio communication is common channel, all of signal must reception processing at once, therefore it is required that
Interior machine main control module 10 and outer machine main control module 30 have enough real-time operation disposal abilities.Wireless transmit requires radio communication mold
The barrier of the impact radio emission efficiency without metal around antenna in block.Therefore, in the present embodiment, it usually needs weight
Hardware circuit newly developed, increases software function（Wireless communication section）.
In another embodiment of the present invention, as shown in fig. 7, the first wireless communication module 20 also includes the first control mould
Block 22, the second wireless communication module 40 also includes the second control module 42.Say, in embodiments of the invention, the first channel radio
Letter module 20 includes the first modulation /demodulation module 21 and the first control module 22, and the second wireless communication module 40 includes the second modulation
The control module 42 of demodulation module 41 and second.
In an embodiment of the present invention, the first wireless communication module 20 and the cost of the second wireless communication module 40 be relatively
Height, but, due to being connected using wire between the control module 22 of interior machine main control module 10 and first, and no matter interior owner
Whether the interface of control module 10 is compatible with the interface of the first modulation /demodulation module 21, can pass through 22 turns of the first control module
Change, need increased calculation resources also completely by the burden of the first control module 22.Interior owner control in i.e. to original indoor set 100
The hardware of module 10, software have no requirement, it is only necessary to original exchange communications portion is removed, interior machine main control module is changed to
10 and first control module 22 simple connection, typically Transistor-Transistor Logic level is directly connected to, or by light-coupled isolation conversion,
The conversion connection of the signal such as MAX232 conversion chip.In the same manner, can adopt between the control module 42 of outer machine main control module 30 and second
Whether wire connects, and compatible with the interface of the second modulation /demodulation module 41 regardless of the interface of outer machine main control module 30, all may be used
To change by the second control module 42, increased calculation resources are needed also completely by the burden of the second control module 42.I.e. to original
There are the hardware of the outer machine main control module 30 in off-premises station 200, software to have no requirement, it is only necessary to original exchange communication unit
Divide and remove, be changed to the simple connection of the control module 42 of outer machine main control module 30 and second, typically Transistor-Transistor Logic level is directly connected to, or
Person is connected by the conversion of the signal conversion chips such as light-coupled isolation conversion, MAX232.Further, since the prolongation effect of wire, first
The wireless communication module 40 of wireless communication module 20 and second may be mounted at where any proper emission signal.
In sum, two schemes have merits and demerits, can according to circumstances select to use.
The communication means of the air conditioning system for proposing to the embodiment of the present invention below is described.Fig. 8 is according to of the invention real
Apply the flow chart of the communication means of the air conditioning system of example proposition, wherein, air conditioning system includes main frame and slave, main frame and slave it
Between wirelessly communicated, main frame and slave have at least one common signal channel and multiple working channels.
As shown in figure 8, the communication means of the air conditioning system of embodiment of the present invention proposition, comprises the steps：
S1, main frame sends invitation signal of shaking hands by least one common signal channel to slave, wherein, shake hands and invite
Please signal have main frame for slave select working channel and main frame identification information.
S2, slave search common signal channel simultaneously returns handshake response signal according to invitation signal of shaking hands to main frame, wherein, shake hands
Response signal has the identification information of selectable working channel and slave.
S3, main frame sends order transmission information by the working channel of selection to slave.
S4, slave is rung by the working channel for selecting after processing order transmission information to main frame feedback command
Answer information.
In one embodiment of the invention, order transmission information includes the identification information and order transmission content of main frame,
Command response message includes the identification information and command response content of slave.
In one embodiment of the invention, at least one common signal channel is multiple, by more public between main frame and slave
Altogether channel hopping Handshake Protocol is shaken hands.
In one embodiment of the invention, in step sl, main frame selects a broadcast to hold in multiple common signal channels
Handss invitation signal, in step s 2, slave is searched for the common signal channel of selection and is returned to main frame according to invitation signal of shaking hands and shakes hands
Response signal, to complete shaking hands between main frame and slave.
In one embodiment of the invention, step S1 also includes：Main frame judges that the occupancy of the common signal channel of selection is
It is no to be less than the first predetermined threshold value；If it is not, then select one to broadcast invitation signal of shaking hands in multiple common signal channels again, until
The occupancy of the common signal channel of selection is less than the first predetermined threshold value.Wherein, the first predetermined threshold value can be 70%.
In one embodiment of the invention, before step S1, the communication means of above-mentioned air conditioning system also includes：It is main
Machine selects one as the working channel between main frame and slave from multiple working channels；Main frame judges the working channel of selection
Occupancy whether be less than the second predetermined threshold value；If it is not, then again from multiple working channels select one as main frame and from
Working channel between machine, until the occupancy of the working channel for selecting is less than the second predetermined threshold value.Wherein, the second predetermined threshold value
Can be 30%.
It is pointed out that to the channel using time-sharing multiplexing technology, the occupancy of channel is lower, and the chance of conflict is got over
It is few, communicate safer.
The communication means of the air conditioning system for proposing according to embodiments of the present invention, using master-slave communication mode channel radio is carried out
Letter, by the suitable common signal channel of Selection of chiller and working channel, realizes that main frame and slave carry out radio communication, and the present invention can
To realize the time-sharing multiplex of multiple working channels.Additionally, the communication means is simple, reliable.
In flow chart or here any process described otherwise above or method description are construed as, expression includes
It is one or more for realizing specific logical function or process the step of the module of code of executable instruction, fragment or portion
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussion suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
In flow charts expression or here logic described otherwise above and/or step, for example, are considered use
In the order list of the executable instruction for realizing logic function, in may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment（As computer based system, the system including processor or other can hold from instruction
The system of row system, device or equipment instruction fetch and execute instruction）Use, or with reference to these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
The dress that defeated program is used for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment
Put.The more specifically example of computer-readable medium（Non-exhaustive list）Including following：With the electricity that one or more are connected up
Connecting portion（Electronic installation）, portable computer diskette box（Magnetic device）, random access memory（RAM）, read only memory
（ROM）, erasable edit read-only storage（EPROM or flash memory）, fiber device, and portable optic disk is read-only deposits
Reservoir（CDROM）.In addition, computer-readable medium can even is that the paper that can thereon print described program or other are suitable
Medium, because for example by carrying out optical scanning to paper or other media edlin, interpretation can then be entered or if necessary with it
His suitable method is processed to electronically obtain described program, in being then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realizing.For example, if realized with hardware, and in another embodiment, can be with well known in the art
Any one of row technology or their combination are realizing：With for realizing the logic gates of logic function to data signal
Discrete logic, the special IC with suitable combinational logic gate circuit, programmable gate array（PGA）, scene
Programmable gate array（FPGA）Deng.
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
Suddenly the hardware that can be by program to instruct correlation is completed, and described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, each functional unit in each embodiment of the invention can be integrated in a processing module, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a module.Above-mentioned integrated mould
Block both can be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module is such as
Fruit is realized and as independent production marketing or when using using in the form of software function module, it is also possible to be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention is by claims and its is equal to limit.
Claims (15)
1. a kind of air conditioning system, it is characterised in that include：
Indoor set, wherein, the indoor set includes：
Interior machine main control module；
The first wireless communication module being connected with the interior machine main control module, first wireless communication module has at least one
Common signal channel and multiple working channels；
Off-premises station, wherein, the off-premises station includes：
Outer machine main control module；And
The second wireless communication module being connected with the outer machine main control module, second wireless communication module and first nothing
The intercommunication of line communication module, second wireless communication module has at least one common signal channel and multiple work
Channel, wherein, the operating carriers wave band of first wireless communication module and second wireless communication module is 433MHz, and
Communication baud rate is in the 19200-55000bits/ seconds；
Wherein, in the indoor set and the off-premises station one be main frame, another in the indoor set and the off-premises station
For slave, complete to shake hands by least one common signal channel between the main frame and slave, and the master
Machine select one as the working channel between the main frame and slave from the plurality of working channel and by it is described at least
One in one common signal channel is sent to the slave, so as to be entered by the working channel of selection between the main frame and slave
Row communication, wherein, at least one common signal channel is multiple, is held by many common signal channel frequency hoppings between the main frame and slave
Handball Association's view is shaken hands.
2. air conditioning system as claimed in claim 1, it is characterised in that the main frame selects in the plurality of common signal channel
Individual to broadcast invitation signal of shaking hands, the slave search common signal channel is simultaneously returned to the main frame according to the invitation signal of shaking hands and held
Handss response signal, to complete shaking hands between the main frame and slave.
3. air conditioning system as claimed in claim 1, it is characterised in that the plurality of common signal channel is evenly distributed in the work
Make in carrier band.
4. air conditioning system as claimed in claim 2, it is characterised in that the main frame is additionally operable to judge the public letter of the selection
Whether the occupancy in road is less than the first predetermined threshold value, and if it is not, then selects one in the plurality of common signal channel again
The broadcast invitation signal of shaking hands, until the selection common signal channel occupancy less than first predetermined threshold value.
5. air conditioning system as claimed in claim 1, it is characterised in that the main frame is additionally operable to judge the work letter of the selection
Whether the occupancy in road is less than the second predetermined threshold value, and if it is not, then selects a work from the plurality of working channel again
For the working channel between the main frame and slave, until the occupancy of the working channel of the selection it is default less than described second
Threshold value.
6. air conditioning system as claimed in claim 2, it is characterised in that the invitation signal of shaking hands has the main frame for described
Working channel and the identification information of the main frame that slave is selected, the handshake response signal has the working channel of the selection
With the identification information of the slave.
7. air conditioning system as claimed in claim 2, it is characterised in that using the work of the selection between the main frame and slave
Make channel and line command transmission information and command response letter are entered by first wireless communication module and the second wireless communication module
The transmission of breath.
8. air conditioning system as claimed in claim 7, it is characterised in that the order sends information includes the mark of the main frame
Information and order transmission content, the command response message includes the identification information and command response content of the slave.
9. air conditioning system as claimed in claim 1, it is characterised in that first wireless communication module includes the first modulatedemodulate
Mode transfer block, second wireless communication module includes the second modulation /demodulation module.
10. air conditioning system as claimed in claim 9, it is characterised in that first wireless communication module is also including the first control
Molding block, second wireless communication module also includes the second control module.
11. a kind of communication means of air conditioning system, it is characterised in that the air conditioning system includes main frame and slave, the main frame
Wirelessly communicated and slave between, there is at least one common signal channel and multiple work to believe for the main frame and slave
Road, wherein, at least one common signal channel is shaken hands association for multiple between the main frame and slave by many common signal channel frequency hoppings
View is shaken hands, and described communication means comprises the steps：
S1, the main frame sends invitation signal of shaking hands by least one common signal channel to the slave, its
In, the invitation signal of shaking hands has the identification information of the working channel that the main frame is the slave selection and the main frame；
S2, the slave search common signal channel simultaneously returns handshake response signal according to the invitation signal of shaking hands to the main frame,
Wherein, the handshake response signal has the working channel of the selection and the identification information of the slave；
S3, the main frame sends order transmission information by the working channel of the selection to the slave；
S4, the slave after processing the order transmission information, by the working channel of the selection to the master
Machine feedback command response message.
12. communication means as claimed in claim 11, it is characterised in that in step S1, the main frame is described more
One is selected in individual common signal channel and broadcasts invitation signal of shaking hands, in step S2, the slave searches for the public affairs of the selection
Altogether channel simultaneously returns handshake response signal according to the invitation signal of shaking hands to the main frame, with complete the main frame and slave it
Between shake hands.
13. communication means as claimed in claim 11, it is characterised in that step S1 also includes：
Whether the main frame judges the occupancy of the common signal channel of the selection less than the first predetermined threshold value；
If it is not, then select invitation signal of shaking hands described in a broadcast in the plurality of common signal channel again, until the choosing
The occupancy of the common signal channel selected is less than first predetermined threshold value.
14. communication means as claimed in claim 11, it is characterised in that before step S1, also include：
The main frame selects one as the working channel between the main frame and slave from the plurality of working channel；
Whether the main frame judges the occupancy of the working channel of the selection less than the second predetermined threshold value；
If it is not, then again one is selected as the working channel between the main frame and slave from the plurality of working channel,
Until the occupancy of the working channel of the selection is less than second predetermined threshold value.
15. communication means as claimed in claim 11, it is characterised in that the order sends information includes the mark of the main frame
Knowledge information and order transmission content, the command response message includes the identification information and command response content of the slave.
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| CN201310275836.8A CN104279719B (en) | 2013-07-02 | 2013-07-02 | Air conditioning system and communication method thereof |
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| CN201310275836.8A CN104279719B (en) | 2013-07-02 | 2013-07-02 | Air conditioning system and communication method thereof |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104896658A (en) * | 2015-05-14 | 2015-09-09 | 广东美的暖通设备有限公司 | Air conditioning system and communication method |
| CN105338477A (en) * | 2015-11-19 | 2016-02-17 | 珠海市杰理科技有限公司 | Multiport communication method, device and system based on radio-frequency transmission |
| CN106322662B (en) * | 2016-08-24 | 2019-11-15 | 青岛海尔空调电子有限公司 | Machine wireless communication system and communication means inside and outside air-conditioning |
| CN106225105B (en) * | 2016-09-20 | 2022-03-01 | 广东美的制冷设备有限公司 | Current loop communication device and air conditioner |
| CN108418820B (en) * | 2018-02-28 | 2021-07-30 | 重庆零壹空间航天科技有限公司 | Method and device for receiving serial data |
| CN109140684B (en) * | 2018-08-21 | 2020-08-25 | 珠海格力电器股份有限公司 | Air conditioner, communication fault detection method and device thereof and storage medium |
| CN110996400A (en) * | 2019-12-17 | 2020-04-10 | 成都国科微电子有限公司 | Radio frequency equipment communication method, system, device and computer storage medium |
| CN111412636B (en) * | 2020-04-07 | 2021-05-25 | 珠海格力电器股份有限公司 | Air conditioner without communication circuit between indoor unit and outdoor unit and control method thereof |
| CN112019099A (en) * | 2020-08-13 | 2020-12-01 | 扬州哈工科创机器人研究院有限公司 | Direct current motor distribution control system |
| CN112543494B (en) * | 2020-12-01 | 2021-09-17 | 北京时代凌宇信息技术有限公司 | Method and equipment for fast network access and automatic frequency hopping in wireless communication |
| CN115406053A (en) * | 2022-09-02 | 2022-11-29 | 珠海格力电器股份有限公司 | Communication method and device for indoor unit and outdoor unit of air conditioner, air conditioner and storage medium |
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