CN109140700A - The means of communication of the communication device of machine, air-conditioning and its inside and outside machine inside and outside a kind of air-conditioning - Google Patents
The means of communication of the communication device of machine, air-conditioning and its inside and outside machine inside and outside a kind of air-conditioning Download PDFInfo
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- CN109140700A CN109140700A CN201810878445.8A CN201810878445A CN109140700A CN 109140700 A CN109140700 A CN 109140700A CN 201810878445 A CN201810878445 A CN 201810878445A CN 109140700 A CN109140700 A CN 109140700A
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- China
- Prior art keywords
- power supply
- machine
- machine controller
- interior
- outside
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The invention discloses the means of communication of the communication device of machine, air-conditioning and its inside and outside machine inside and outside a kind of air-conditioning, which includes: isolating device and power supply unit；Wherein, the isolating device, the communicating circuit for the inside and outside machine controller to the air-conditioning are isolated with control circuit；The power supply unit, under the communicating circuit and the segregate situation of control circuit in the inside and outside machine controller, the communicating circuit and control circuit of the respectively described inside and outside machine controller to be powered.The solution of the present invention, the communication node that can solve machine inside and outside air-conditioning in the prior art are respectively connected to respective local greatly and there is a problem of communication security difference, achieve the effect that promote communication security.
Description
Technical field
The invention belongs to air-conditioning technical fields, and in particular to the communication device of machine inside and outside a kind of air-conditioning, air-conditioning and its inside and outside
The device of 485 communicating circuits, the sky with the device is isolated in the means of communication of machine more particularly to a kind of 48V power-supply controller entirely
The inside and outside machine means of communication of tune and the air-conditioning.
Background technique
What existing domestic air conditioning controller used is typically all the AC power supply modes such as 220V, and 48V power supply air-conditioning has been answered
For in air conditioning for automobiles, and domestic air conditioning 48V power supply is increasingly becoming the object of research, the stability of 48V direct current conveying electricity is good,
Be lost it is small, and with more safety compared with alternating current.Directly the communication node of machine inside and outside air-conditioning is respectively connected to respectively
From local greatly, earth potential difference can be superimposed upon the output end of bus transmitter, the letter after being superimposed in the form of common-mode voltage
Number may considerably beyond the common-mode input voltage range that receiver can bear, thus caused by earth potential difference may be up to it is a few volt,
Tens volts of even upper hectovolts, the voltage range that can bear far beyond transceiver.
Compared with traditional air conditioner, interior machine controller is powered using 48V it is envisaged that how to establish with outer machine controller
Communication has more safety and reliability.
Summary of the invention
It is an object of the present invention in view of the foregoing drawbacks, the communication device of machine inside and outside a kind of air-conditioning, air-conditioning and its interior are provided
The means of communication of outer machine are respectively connected to respective local with the communication node of machine inside and outside solution in the prior art air-conditioning and deposit greatly
In the problem of communication security difference, achieve the effect that promote communication security.
The present invention provides a kind of communication device of machine inside and outside air-conditioning, comprising: isolating device and power supply unit；Wherein, described
Isolating device, the communicating circuit for the inside and outside machine controller to the air-conditioning are isolated with control circuit；It is described for Denso
It sets, under the communicating circuit and the segregate situation of control circuit in the inside and outside machine controller, the respectively described inside and outside machine
The communicating circuit and control circuit of controller are powered.
Optionally, the isolating device, comprising: the first isolation strip and the second isolation strip；Wherein, first isolation strip,
For to interior machine controller in the inside and outside machine controller interior machine communicating circuit and interior machine control circuit be isolated；Described
Two isolation strip, for the inside and outside machine controller China and foreign countries machine controller outer machine communicating circuit and outer machine control circuit carry out every
From.
Optionally, wherein first isolation strip, it is embedded to be arranged in the interior machine controller；And/or described
Two isolation strip, it is embedded to be arranged in the outer machine controller.
Optionally, first isolation strip, comprising: the first isolation module, the second isolation module and third isolation module；Its
In, first isolation module, be arranged in the interior machine receiver of the interior machine communicating circuit, the interior machine control circuit and
Between the ground of the interior machine controller；Second isolation module, be arranged in the interior machine communicating circuit interior machine receiver or
Between the ground of the enable end of interior machine follower, the interior machine control circuit and the interior machine controller；The third isolation mode
The ground of the interior machine follower of the interior machine communicating circuit, the interior machine control circuit and the interior machine controller is arranged in block
Between.
Optionally, wherein in first isolation strip, first isolation module, second isolation module and institute
It states between third isolation module in band-like setting；And/or the structure of the structure of second isolation strip and first isolation strip
It is identical.
Optionally, first isolation module, second isolation module are identical with the structure of the third isolation module；
Wherein, first isolation module, comprising: signal isolation chip or photoisolator.
Optionally, the power supply unit is respectively communicating circuit and the control circuit power supply of the inside and outside machine controller, packet
It includes: by the DC power supply of interior machine controller in the inside and outside machine controller, being separately converted to the first power supply and second
Power supply；First power supply is to the interior machine control circuit power supply in the interior machine controller；The second power supply electricity
Source, on the one hand after the first pressure stabilizing to the interior machine communicating circuit power supply in the interior machine controller, be on the other hand divided into two-way to
Outer machine controller power supply in the inside and outside machine controller；Wherein, it is controlled all the way directly to the outer machine in the outer machine controller
Circuit power supply, another way is after the second pressure stabilizing to the outer machine communicating circuit power supply in the outer machine controller.
Optionally, wherein first pressure stabilizing, comprising: second power supply is in the interior machine controller through one
A power module carries out the first pressure stabilizing；And/or second pressure stabilizing, comprising: second power supply is set described interior
Another power module between machine controller and the outer machine controller carries out the second pressure stabilizing；And/or the interior machine communicating circuit
It is isolated between the ground of power supply and the ground of the interior machine control circuit power supply and is provided separately, the outer machine communicating circuit supplies
It is isolated between the ground of power supply and the ground of the outer machine control circuit power supply and is provided separately；Also, the interior machine communication electricity
It is isolated between the ground of road power supply and the ground of the outer machine communicating circuit power supply and is provided separately.
Optionally, the power module, comprising: Voltage stabilizing module or DC-DC chip.
Optionally, the communicating circuit, comprising: isolated transceiver；The isolated transceiver, comprising: RS485 communication receiving/transmission
Device.
Match with above-mentioned apparatus, further aspect of the present invention provides a kind of air-conditioning, comprising: machine inside and outside above-described air-conditioning
Communication device.
Match with above-mentioned air-conditioning, another aspect of the present invention provides a kind of means of communication of machine inside and outside air-conditioning, comprising: passes through
The communicating circuit of the inside and outside machine controller of the air-conditioning is isolated with control circuit for isolating device；By power supply unit,
Under the communicating circuit and the segregate situation of control circuit of the inside and outside machine controller, the respectively described inside and outside machine controller it is logical
Interrogate circuit and control circuit power supply.
Optionally, the communicating circuit of the inside and outside machine controller of the air-conditioning is isolated with control circuit, comprising: pass through
First isolation strip, interior machine communicating circuit to interior machine controller in the inside and outside machine controller and interior machine control circuit carry out every
From；Outer machine communicating circuit and outer machine control circuit by the second isolation strip, to the inside and outside machine controller China and foreign countries machine controller
It is isolated.
Optionally, the communicating circuit of the respectively described inside and outside machine controller and control circuit power supply, comprising: will be described inside and outside
The DC power supply of interior machine controller in machine controller, is separately converted to the first power supply and the second power supply；Make institute
The first power supply is stated to the interior machine control circuit power supply in the interior machine controller；Make second power supply, on the one hand
To the interior machine communicating circuit power supply in the interior machine controller after the first pressure stabilizing, on the other hand it is divided into two-way to the inside and outside machine
Outer machine controller power supply in controller；Wherein, it powers all the way directly to the outer machine control circuit in the outer machine controller, separately
All the way to the outer machine communicating circuit power supply in the outer machine controller after the second pressure stabilizing.
Optionally, wherein the ground of the interior machine communicating circuit power supply and the interior machine control circuit power supply
Isolation is provided separately between ground, the ground on the ground of the outer machine communicating circuit power supply and the outer machine control circuit power supply
Between be isolated and be provided separately；Also, the ground of the interior machine communicating circuit power supply and the outer machine communicating circuit power supply
Ground between be isolated and be provided separately.
The solution of the present invention, by the way that isolation strip to be embedded into isolated transceiver, isolated transceiver can be by bus and control
Circuit carries out electrical isolation, can effectively guarantee the person and system safety of operator, improve communication security and can
By property.
Further, the solution of the present invention, by the way that isolation strip to be embedded into isolated transceiver, isolated transceiver can be by bus
Electrical isolation is carried out with control circuit, the various common mode interferences as caused by ground potential differences, ground loop can be inhibited, is guaranteed total
Line is uninterrupted in the presence of severe jamming and other system-level noises, zero defect operation, improve communication reliability and
Stability.
Further, the solution of the present invention, by 485 communicating circuits of isolation bus and control circuit can be carried out electrically every
From, high pressure is blocked in except control system, so that the power supply voltage-to-ground of outer machine is unlikely to excessively high and burns interior machine controller,
It realizes effective isolation, to protect inside and outside machine controller, is operated normally so that air-conditioning is stablized.
The solution of the present invention as a result, realizes effective isolation by interior machine controller 48V power supply, logical establishing with outer machine
The circuit of news realizes full isolation, so that the power supply voltage-to-ground of outer machine is unlikely to excessively high and burns interior machine controller, solves existing
The communication node of machine is respectively connected to respective local greatly and there is a problem of communication security difference inside and outside air-conditioning in technology, from
And overcome in the prior art the defect that safety is poor, reliability is low and stability is poor, realize that safety is good, high reliablity and steady
Qualitative good beneficial effect.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the communication device of machine inside and outside air-conditioning of the invention；
Fig. 2 is the power supply structure schematic diagram of 485 communicating circuit of interior machine of an embodiment of air-conditioning of the invention, specifically can be with
Show the power supply mode of 485 communicating circuit of machine in domestic air conditioning；
Fig. 3 is the ground wire connecting structure schematic diagram of the inside and outside machine communicating circuit of an embodiment of air-conditioning of the invention, specifically
It can show that machine ground wire processing inside and outside 485 communicating circuits is isolated in machine entirely inside and outside domestic air conditioning；
Fig. 4 is that the structural schematic diagram of 485 communicating circuits is isolated in the inside and outside machine of an embodiment of air-conditioning of the invention entirely, specifically
485 communicating circuit schematic diagrames are isolated entirely for machine inside and outside domestic air conditioning；
Fig. 5 is the flow diagram of an embodiment of the means of communication of machine inside and outside air-conditioning of the invention；
Fig. 6 is the communicating circuit of the respectively described inside and outside machine controller and control circuit are powered in method of the invention one
The flow diagram of embodiment.
In conjunction with attached drawing, appended drawing reference is as follows in the embodiment of the present invention:
Machine controller (such as interior 485 circuit of machine) in 10-；The first isolation strip 11-；The outer machine controller of 20- (such as outer 485 electricity of machine
Road)；The second isolation strip 21-；30- power module.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
According to an embodiment of the invention, providing a kind of communication device of machine inside and outside air-conditioning.It is shown in Figure 1 of the invention
The structural schematic diagram of one embodiment of device.The communication device of machine may include: isolating device and power supply unit inside and outside the air-conditioning.
In an optional example, the isolating device, be set in the inside and outside machine controller of the air-conditioning (such as with it is described
The inside and outside machine controller of air-conditioning is equipped with), it can be used for the communicating circuit and control to the inside and outside machine controller of the air-conditioning
Circuit is isolated.
Such as: using the communication modes being isolated entirely, the communicating circuit of inside and outside machine and other circuits of controller are completely isolated
It opens, there is safer more reliable communication.
Wherein, the communicating circuit may include: isolated transceiver.The isolated transceiver may include: RS485 logical
Interrogate transceiver.
Inside and outside machine communication is carried out by using RS485 communications transceiver as a result, communicates high reliablity, high safety.
Optionally, the isolating device may include: the first isolation strip 11 and the second isolation strip 21.
In an optional specific example, first isolation strip 11 can be used for interior in the inside and outside machine controller
The interior machine communicating circuit of machine controller 10 and interior machine control circuit are isolated.
More optionally, first isolation strip 11, it is embedded to be arranged in the interior machine controller 10, such as: it is embedded
It is arranged between the interior machine communicating circuit of the interior machine controller 10 and interior machine control circuit.
As a result, by the way that the embedded setting in the first isolation strip in interior machine controller, can reliably be realized interior machine controller
In isolation between interior machine communicating circuit and interior machine control circuit, and embedded the beautiful journey that will not influence interior machine controller is set
Degree, will not occupy the too many space of interior machine controller.
Specifically, first isolation strip 11 may include: the first isolation module, the second isolation module and third isolation
Module.
Wherein, the interior machine receiver of the interior machine communicating circuit is arranged in first isolation module, the interior machine controls
Between the ground of circuit and the interior machine controller.The interior machine of the interior machine communicating circuit is arranged in second isolation module
Between the ground of the enable end of receiver or interior machine follower, the interior machine control circuit and the interior machine controller.Described
Interior machine follower, the interior machine control circuit and the interior machine control of the interior machine communicating circuit is arranged in three isolation modules
Between the ground of device processed.
The first isolation strip is formed by three isolation modules as a result, on the one hand can reliably be realized in interior machine controller
Reliable isolation between machine communicating circuit and interior machine control circuit, another aspect structure is simple, safety is good.
Still optionally further, in first isolation strip 11, first isolation module, second isolation module
It is in band-like setting between the third isolation module.
As a result, by making three isolation modules in band-like setting in the first isolation strip, be conducive to promote the comprehensive of isolation
Property and reliability.
Still optionally further, the knot of first isolation module, second isolation module and the third isolation module
Structure is identical.
As a result, by using mutually isostructural isolation module formed isolation strip, be conducive to promoted isolation stability and
Even property.
Wherein, first isolation module may include: signal isolation chip or photoisolator.
Such as: the mode of isolation can be isolated by the way of Phototube Coupling, using light-coupled isolation, using light as medium
Input end signal is coupled to the photoelectrical coupler of output end, small in size, the service life is long, contactless, anti-interference energy since it has
The advantages that power is strong, insulate between output and input, one-way transmission signal.
Such as: signal isolation chip has higher anti-interference ability to radiation and conducted noise, can support higher
Transmission rate, the method being more securely and reliably isolated can be isolated by using light-coupled isolation mode, but special chip
The cost is relatively high.
As a result, by the isolation module of diversified forms, so that isolation is more convenient, also more flexible.
In an optional specific example, second isolation strip 21 can be used for the inside and outside machine controller China and foreign countries
The outer machine communicating circuit of machine controller 20 and outer machine control circuit are isolated.
It is individually insulated respectively by the internal machine controller in two isolation strip and outer machine controller as a result, so that isolation
Reliability and the available guarantee of safety, and isolation method is succinct, convenient.
More optionally, second isolation strip 21, embedded to be arranged in the outer machine controller 20, embedded setting exists
Between the outer machine communicating circuit and outer machine control circuit of the outer machine controller 20.
Such as: isolation strip is embedded into isolated transceiver, isolated transceiver bus and control circuit can be carried out electrically every
From, that is to say, that bus and control circuit can be carried out electrical isolation by 485 communicating circuits of isolation, and high pressure is blocked in control system
Except, it can effectively guarantee the person and system safety of operator；Isolation can inhibit by ground potential differences, ground loop
Caused various common mode interferences guarantee bus uninterrupted, indifference in the presence of severe jamming and other system-level noises
Wrong Shipment row.
Such as: as shown in figure 3, after using isolated transceiver, can be effectively prevented to form ground loop and (effectively prevent interior machine
A common-mode voltage may be generated between the ground of controller and the ground of outer machine controller), bus can follow common mode electric with reference to ground
The fluctuation of pressure and fluctuate, common-mode voltage is all born by isolation strip, and common-mode voltage becomes no longer visible to bus signals, to protect
Card bus reliablely and stablely communicates.
As a result, by the way that the embedded setting in the second isolation strip in outer machine controller, can reliably be realized interior machine controller
Isolation between China and foreign countries' machine communicating circuit and outer machine control circuit, and embedded setting will not influence the beautiful journey of outer machine controller
Degree, will not occupy the too many space of outer machine controller.
Specifically, the structure of second isolation strip 21 is identical as the structure of first isolation strip 11.
As a result, by making the structure of the second isolation strip in outer machine controller and the knot of the first isolation strip in interior machine controller
Structure is identical, is conducive to the symmetry for promoting inside and outside machine controller isolation, and then promote the uniformity and stability of isolation.
In an optional example, the power supply unit is connected to the power supply of the inside and outside machine controller, can
With under the communicating circuit and the segregate situation of control circuit in the inside and outside machine controller, the respectively described inside and outside machine control
The communicating circuit and control circuit of device processed are powered.
Such as: effective isolation is realized by interior machine controller 48V power supply, is realized in the circuit for establishing communication with outer machine complete
Isolation realizes effective isolation, to protect so that the power supply voltage-to-ground of outer machine is unlikely to excessively high and burns interior machine controller
Inside and outside machine controller operates normally so that air-conditioning is stablized.
The communicating circuit of the inside and outside machine controller of air-conditioning and control circuit are isolated by isolating device as a result, and passed through
Power supply unit is inside and outside machine controller power supply in the case where the communicating circuit of inside and outside machine controller is isolated with control circuit, can be with
Guarantee that inside and outside machine controller is reliable under secure conditions, steadily work.
Optionally, the power supply unit is respectively communicating circuit and the control circuit power supply of the inside and outside machine controller, can
To include: the power supply unit, specifically can be used for the direct current supply electricity of machine controller 10 interior in the inside and outside machine controller
Source (such as 48V DC power supply) is separately converted to the first power supply (such as+5V power supply) and the second power supply (such as COM485_8V
Power supply).Wherein:
First, first power supply is to the interior machine control circuit power supply in the interior machine controller 10.
Second, second power supply (such as COM485_8V power supply) on the one hand gives the interior machine control after the first pressure stabilizing
On the other hand interior machine communicating circuit power supply in device 10 processed is divided into two-way to the outer machine controller 20 in the inside and outside machine controller
Power supply.Wherein, it powers all the way directly to the outer machine control circuit in the outer machine controller 20, another way is given after the second pressure stabilizing
Outer machine communicating circuit power supply in the outer machine controller 20.
Such as: the power supply mode of interior 485 communicating circuit of machine are as follows: 48V is converted into+5V, COM485_8V；COM485_8V is divided into
Two-way directly feeds outer machine all the way, and outer machine adds a power module in the power end communicated with interior machine 485, in outer generator terminal pressure stabilizing
It is used at COM485_VCC to outer 485 communication chip of machine, another way is converted into COM485_ also by power module in interior machine
VCC is used to interior 485 communication chip of machine, and COM485_GND is isolated with the GND use of interior machine to be separated, and makes the two not for ground, it is ensured that
The safety of circuit, COM485_8V, COM485_GND individually power to outer machine, will be only used in 485 communications with the communication of outer machine,
COM485_VCC, COM485_GND individually give 485 communicating circuits of interior machine to use, GND ,+5V voltage for master chip etc. other
Circuit power supply, to realize being effectively isolated for power supply.
As a result, by make power supply unit by the DC power supply of interior machine controller be separately converted to the first power supply and
Second power supply, the first power supply are powered to interior machine control circuit, on the one hand the second power supply gives interior machine after pressure stabilizing
On the other hand communicating circuit power supply powers directly to outer machine control circuit and powers after pressure stabilizing to outer machine communicating circuit, supplies
Electric mode is simple, reliable, is conducive to the reliability and safety that promote inside and outside machine power supply, and structure is simple, between power supply ground
Isolation effect is good.
More optionally, first pressure stabilizing may include: that second power supply passes through in the interior machine controller 10
One power module 30 carries out the first pressure stabilizing；Second pressure stabilizing may include: that second power supply is set described
Another power module 30 between interior machine controller 10 and the outer machine controller 20 carries out the second pressure stabilizing.
As a result, by directly carrying out pressure stabilizing using the power module in interior machine controller, use what is added between inside and outside machine
Power module carries out pressure stabilizing etc., and voltage regulation way is flexibly and reliable, and structure of voltage regulation is simple.
More optionally, the ground of the ground of the interior machine communicating circuit power supply and the interior machine control circuit power supply it
Between be isolated and be provided separately, between the ground of the outer machine communicating circuit power supply and the ground of the outer machine control circuit power supply
Isolation is provided separately；Also, the ground on the ground of the interior machine communicating circuit power supply and the outer machine communicating circuit power supply
Between be isolated and be provided separately.
Such as: the effect of isolation strip is that the transmitting terminal of 485 communication chips and receiving end are controlled with other in the controller
Circuit is kept apart, and by the isolation of isolation strip, 485 communications transceivers (485 communication chip) are inside and outside for 485 communicating circuits of inside and outside machine
The ground of machine is together, and the ground of interior machine, the ground of outer machine can be kept apart, to ensure that communication security and reliable communicating.
Pass through as a result, make to be isolated between inside and outside machine controller and make inside and outside machine controller respectively inside communicating circuit and
Control circuit isolation promotes the safety and reliability of inside and outside machine communication so as to realize the reliable isolation of inside and outside machine.
Wherein, the power module 30 may include: Voltage stabilizing module (such as 7805 Voltage stabilizing modules) or DC-DC chip.
Such as: power module can be used at+5V to 485 communication chips by 7805 Voltage stabilizing module pressure stabilizings.
Such as: power module can also be converted by DC-DC chip, be converted to+5V and used to 485 communication chips.
As a result, by the power module of diversified forms, so that the pressure stabilizing operation of power module is more flexible, also more square
Just.
Through a large amount of verification experimental verification, using technical solution of the present invention, by the way that isolation strip is embedded into isolated transceiver,
Bus and control circuit can be carried out electrical isolation by isolated transceiver, can effectively guarantee the person and system peace of operator
Entirely, communication security and reliability are improved.
According to an embodiment of the invention, additionally providing a kind of air-conditioning corresponding to the communication device of machine inside and outside air-conditioning.The sky
Tune may include: the communication device of machine inside and outside above-described air-conditioning.
In an optional embodiment, the present invention proposes that the side of 485 communicating circuits is isolated in a kind of 48V power-supply controller entirely
Method can eliminate earth potential difference and the potential electrical isolation that Keep Clear-High Voltage, realizes between the 485 communication outer machines of power supply and interior machine,
Reliable and stable communication is established, to realize machine 48V powered by direct current in domestic air conditioning, outer machine 400V powered by direct current controller
The security reliability operation of 485 communications.Specifically, earth potential difference can be eliminated and potentially Keep Clear-High Voltage, realize and use interior machine
Problem is effectively treated altogether for 48V power supply, outer machine 400V power supply；It can also realize that 485 communications are powered between outer machine and interior machine
Electrical isolation establishes reliable and stable communication.
In an optional example, the solution of the present invention, can by interior machine controller 48V power realize effectively every
From being isolated entirely in the circuit realization for establishing communication with outer machine, so that the power supply voltage-to-ground of outer machine is unlikely to excessively high and burns interior
Machine controller realizes effective isolation, to protect inside and outside machine controller, operates normally so that air-conditioning is stablized.
In an optional specific embodiment, the example of Fig. 2 to Fig. 4 may refer to, the realization to the solution of the present invention
Process is specifically described.
Example shown in Figure 3, the isolation strip of Fig. 3 can be understood as the isolation strip of inside and outside 485 communications transceiver of machine.
Isolation strip is embedded into isolated transceiver, and bus and control circuit can be carried out electrical isolation by isolated transceiver, that is to say, that every
Bus and control circuit can be subjected to electrical isolation from 485 communicating circuits, high pressure is blocked in except control system, it can be effective
Ground guarantees the person and system safety of operator.Moreover, isolation can inhibit to be caused by ground potential differences, ground loop
Various common mode interferences, guarantee bus uninterrupted, indifference Wrong Shipment in the presence of severe jamming and other system-level noises
Row.As shown in figure 3, after using isolated transceiver, can be effectively prevented to form ground loop and (effectively prevent the ground of interior machine controller
A common-mode voltage may be generated between the ground of outer machine controller), bus with reference to ground can follow common-mode voltage fluctuation and
Fluctuation, common-mode voltage are all born by isolation strip, and common-mode voltage becomes no longer visible to bus signals, to guarantee that bus is stablized
Reliably communicate.
Wherein, the effect of isolation strip is that the transmitting terminal of 485 communication chips and receiving end are controlled with other in the controller
Circuit is kept apart, and by the isolation of isolation strip, 485 communications transceivers (485 communication chip) are inside and outside for 485 communicating circuits of inside and outside machine
The ground of machine is together, and the ground of interior machine, the ground of outer machine can be kept apart, to ensure that communication security and reliable communicating.
In Fig. 3, RE is that receiver exports enabled (low level is effective), and DE transmitter exports enabled (high level is effective).When
When DE is low level, driver output is high-impedance state.When driver output is effective, device is used as line drive.And it is high
Under resistance state, if RE is low level, device is used as line receiver.
Example shown in Figure 4, core of the invention technology are embodied in using the communication modes being isolated entirely, inside and outside machine
Other of communicating circuit and controller circuit are isolated entirely from, and have safer more reliable communication；Being also embodied in can use
Different partition methods；It is also embodied in the power distribution and power conversion mode of 485 communicating circuit of inside and outside machine.
Specifically, what domestic air conditioning used is all that mains voltage is powered, in 48V direct current project, machine in split air conditioner
Power supply mode will will will be different in controller power supply mode using 48V direct current as power voltage supply.
RS485 transceiver common-mode voltage range is -7V~+12V, only meets the condition, whole network could work normally.Work as network
It just will affect the stabilization of communication, or even damage interface when common-mode voltage exceeds this range in route.In the present invention, 48V is interior
The maximum voltage of machine, and+5V, the circuits such as controller master chip and detection plate are chosen for 485 communication voltages of outer machine communication
It using+5V voltage, is connected to ground again if directly their+5V is connected, outer machine supply voltage maximum voltage reaches
400V or more, it will serious interference, or even the risk that interior mainboard is burnt are generated to the communication of inside and outside machine.
In view of 485 connections are longer, if directly exporting COM485_VCC to outer machine from interior generator terminal, the electricity of outer machine is reached
Pressure will be less than COM485_VCC, therefore comprehensively consider, the power supply mode of interior 485 communicating circuit of machine are as follows: and 48V is converted into+5V,
COM485_8V；COM485_8V is divided into two-way, directly feeds outer machine all the way, and outer machine adds one in the power end communicated with interior machine 485
A power module, outer generator terminal pressure stabilizing at COM485_VCC give outer 485 communication chip of machine use, another way in interior machine also by
Power module is converted into COM485_VCC and uses to interior 485 communication chip of machine, and COM485_GND is isolated point with the GND use of interior machine
Open, both make not for ground, it is ensured that the safety of circuit, COM485_8V, COM485_GND individually power to outer machine, will be only used in
In 485 communications of outer machine communication, COM485_VCC, COM485_GND individually give 485 communicating circuits of interior machine to use, GND ,+5V
Voltage is for the power supply of other circuits such as master chip, to realize being effectively isolated for power supply.
The method of 485 communicating circuits is isolated in controller entirely, can be well forceful electric power circuit part and light current using isolation
Circuit is kept apart, and outer machine connection end part is isolated as strong power part interior machine connection end part as weak current part entirely
Mode can protect the controller secure of inside and outside machine well, so that 48V controller, outer machine that interior machine controller uses control
(it is 400V straight that such as interior machine controller supply voltage, which is 48V direct current, outer machine controller supply voltage, for 400V controller that device uses
Galvanic electricity), it is unlikely to damage controller because of voltage difference, can be advantageously applied in straight fluidization system.
Optionally, power module can be used at+5V to 485 communication chips by 7805 Voltage stabilizing module pressure stabilizings.
Optionally, power module can also be converted by DC-DC chip, be converted to+5V and used to 485 communication chips.
Optionally, the mode of isolation can be isolated by the way of Phototube Coupling, be matchmaker with light using light-coupled isolation
It is situated between and input end signal is coupled to the photoelectrical coupler of output end, small in size, the service life is long, contactless since it has, anti-interference
The advantages that ability is strong, insulate between output and input, one-way transmission signal.
Optionally, signal isolation chip has higher anti-interference ability to radiation and conducted noise, can support higher
Transmission rate, the method being more securely and reliably isolated can be isolated by using light-coupled isolation mode, but dedicated core
The cost is relatively high for piece.
The processing and function realized by the air-conditioning of the present embodiment essentially correspond to earlier figures 1 to device shown in Fig. 4
Embodiment, principle and example, therefore not detailed place in the description of the present embodiment may refer to mutually speaking on somebody's behalf in previous embodiment
Bright, this will not be repeated here.
Through a large amount of verification experimental verification, using technical solution of the present invention, by the way that isolation strip is embedded into isolated transceiver,
Bus and control circuit can be carried out electrical isolation by isolated transceiver, can be inhibited as caused by ground potential differences, ground loop
Various common mode interferences guarantee that bus uninterrupted, zero defect in the presence of severe jamming and other system-level noises is run,
Improve communication reliability and stability.
According to an embodiment of the invention, additionally providing the means of communication of machine inside and outside a kind of air-conditioning corresponding to air-conditioning, such as Fig. 5
The flow diagram of one embodiment of shown method of the invention.The means of communication of machine may include: step inside and outside the air-conditioning
S110 and step S120.
Communicating circuit and control electricity at step S110, by isolating device, to the inside and outside machine controller of the air-conditioning
Road is isolated.
Such as: using the communication modes being isolated entirely, the communicating circuit of inside and outside machine and other circuits of controller are completely isolated
It opens, there is safer more reliable communication.
Optionally, in step S110 to the communicating circuit of the inside and outside machine controller of the air-conditioning and control circuit carry out every
From, may include: by the first isolation strip 11, to the interior machine communicating circuit of interior machine controller 10 in the inside and outside machine controller and
Interior machine control circuit is isolated.
Optionally, in step S110 to the communicating circuit of the inside and outside machine controller of the air-conditioning and control circuit carry out every
From, may include: by the second isolation strip 21, to the outer machine communicating circuit of the inside and outside machine controller China and foreign countries machine controller 20 and
Outer machine control circuit is isolated.
It is individually insulated respectively by the internal machine controller in two isolation strip and outer machine controller as a result, so that isolation
Reliability and the available guarantee of safety, and isolation method is succinct, convenient.
At step S120, by power supply unit, the inside and outside machine controller communicating circuit and control circuit by every
From in the case where, the communicating circuit of the respectively described inside and outside machine controller and control circuit power supply.
Such as: effective isolation is realized by interior machine controller 48V power supply, is realized in the circuit for establishing communication with outer machine complete
Isolation realizes effective isolation, to protect so that the power supply voltage-to-ground of outer machine is unlikely to excessively high and burns interior machine controller
Inside and outside machine controller operates normally so that air-conditioning is stablized.
The communicating circuit of the inside and outside machine controller of air-conditioning and control circuit are isolated by isolating device as a result, and passed through
Power supply unit is inside and outside machine controller power supply in the case where the communicating circuit of inside and outside machine controller is isolated with control circuit, can be with
Guarantee that inside and outside machine controller is reliable under secure conditions, steadily work.
It is alternatively possible to as shown in connection with fig. 6 be respectively the communicating circuit of the inside and outside machine controller in method of the invention
With an embodiment flow diagram of control circuit power supply, further illustrate in step S120 to be respectively the inside and outside machine controller
Communicating circuit and control circuit power supply detailed process, may include: step S210 to step S230.
Step S210, by DC power supply (such as 48V direct current of machine controller 10 interior in the inside and outside machine controller
Source), it is separately converted to the first power supply (such as+5V power supply) and the second power supply (such as COM485_8V power supply).
Step S220 makes first power supply to the interior machine control circuit power supply in the interior machine controller 10.
Step S230 makes second power supply (such as COM485_8V power supply), on the one hand to described after the first pressure stabilizing
On the other hand interior machine communicating circuit power supply in interior machine controller 10 is divided into two-way to the outer machine control in the inside and outside machine controller
Device 20 processed is powered.Wherein, it powers all the way directly to the outer machine control circuit in the outer machine controller 20, another way is steady through second
To the outer machine communicating circuit power supply in the outer machine controller 20 after pressure.
Such as: the power supply mode of interior 485 communicating circuit of machine are as follows: 48V is converted into+5V, COM485_8V；COM485_8V is divided into
Two-way directly feeds outer machine all the way, and outer machine adds a power module in the power end communicated with interior machine 485, in outer generator terminal pressure stabilizing
It is used at COM485_VCC to outer 485 communication chip of machine, another way is converted into COM485_ also by power module in interior machine
VCC is used to interior 485 communication chip of machine, and COM485_GND is isolated with the GND use of interior machine to be separated, and makes the two not for ground, it is ensured that
The safety of circuit, COM485_8V, COM485_GND individually power to outer machine, will be only used in 485 communications with the communication of outer machine,
COM485_VCC, COM485_GND individually give 485 communicating circuits of interior machine to use, GND ,+5V voltage for master chip etc. other
Circuit power supply, to realize being effectively isolated for power supply.
As a result, by make power supply unit by the DC power supply of interior machine controller be separately converted to the first power supply and
Second power supply, the first power supply are powered to interior machine control circuit, on the one hand the second power supply gives interior machine after pressure stabilizing
On the other hand communicating circuit power supply powers directly to outer machine control circuit and powers after pressure stabilizing to outer machine communicating circuit, supplies
Electric mode is simple, reliable, is conducive to the reliability and safety that promote inside and outside machine power supply, and structure is simple, between power supply ground
Isolation effect is good.
Wherein, the interval on the ground of the ground of the interior machine communicating circuit power supply and the interior machine control circuit power supply
From being provided separately, it is isolated between the ground of the outer machine communicating circuit power supply and the ground of the outer machine control circuit power supply
It is provided separately.Also, between the ground of the interior machine communicating circuit power supply and the ground of the outer machine communicating circuit power supply
Isolation is provided separately.
Such as: the effect of isolation strip is that the transmitting terminal of 485 communication chips and receiving end are controlled with other in the controller
Circuit is kept apart, and by the isolation of isolation strip, 485 communications transceivers (485 communication chip) are inside and outside for 485 communicating circuits of inside and outside machine
The ground of machine is together, and the ground of interior machine, the ground of outer machine can be kept apart, to ensure that communication security and reliable communicating.
Pass through as a result, make to be isolated between inside and outside machine controller and make inside and outside machine controller respectively inside communicating circuit and
Control circuit isolation promotes the safety and reliability of inside and outside machine communication so as to realize the reliable isolation of inside and outside machine.
The processing and function realized by the method for the present embodiment essentially correspond to the embodiment of aforementioned air-conditioning, principle and
Example, therefore not detailed place in the description of the present embodiment, may refer to the related description in previous embodiment, do not do herein superfluous
It states.
Through a large amount of verification experimental verification, using the technical solution of the present embodiment, by 485 communicating circuits of isolation can by bus and
Control circuit carries out electrical isolation, high pressure is blocked in except control system, so that the power supply voltage-to-ground of outer machine was unlikely to
It is high and burn interior machine controller, it realizes effective isolation, to protect inside and outside machine controller, is operated normally so that air-conditioning is stablized.
To sum up, it will be readily appreciated by those skilled in the art that under the premise of not conflicting, above-mentioned each advantageous manner can be certainly
It combined, be superimposed by ground.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (15)
1. the communication device of machine inside and outside a kind of air-conditioning characterized by comprising isolating device and power supply unit；Wherein,
The isolating device, the communicating circuit for the inside and outside machine controller to the air-conditioning are isolated with control circuit；
The power supply unit, for dividing under the communicating circuit and the segregate situation of control circuit in the inside and outside machine controller
Not Wei the inside and outside machine controller communicating circuit and control circuit power supply.
2. the apparatus according to claim 1, which is characterized in that the isolating device, comprising: the first isolation strip (11) and
Two isolation strip (21)；Wherein,
First isolation strip (11), for the interior machine communicating circuit of machine controller (10) interior in the inside and outside machine controller and
Interior machine control circuit is isolated；
Second isolation strip (21), for the outer machine communicating circuit of the inside and outside machine controller China and foreign countries machine controller (20) and
Outer machine control circuit is isolated.
3. the apparatus of claim 2, which is characterized in that wherein,
First isolation strip (11) is embedded to be arranged in the interior machine controller (10)；And/or
Second isolation strip (21) is embedded to be arranged in the outer machine controller (20).
4. device according to claim 2 or 3, which is characterized in that first isolation strip (11), comprising: the first isolation
Module, the second isolation module and third isolation module；Wherein,
First isolation module, be arranged in the interior machine receiver of the interior machine communicating circuit, the interior machine control circuit and
Between the ground of the interior machine controller；
Second isolation module, be arranged in the interior machine receiver of the interior machine communicating circuit or the enable end of interior machine follower,
Between the interior machine control circuit and the ground of the interior machine controller；
The third isolation module, be arranged in the interior machine follower of the interior machine communicating circuit, the interior machine control circuit and
Between the ground of the interior machine controller.
5. device according to claim 4, which is characterized in that wherein,
In first isolation strip (11), first isolation module, second isolation module and the third isolation mode
It is in band-like setting between block；
And/or
The structure of second isolation strip (21) is identical as the structure of first isolation strip (11).
6. device according to claim 4 or 5, which is characterized in that first isolation module, second isolation module
It is identical with the structure of the third isolation module；Wherein,
First isolation module, comprising: signal isolation chip or photoisolator.
7. device described in one of -6 according to claim 1, which is characterized in that the power supply unit is respectively the inside and outside machine control
The communicating circuit and control circuit of device processed are powered, comprising:
Will in the inside and outside machine controller interior machine controller (10) DC power supply, be separately converted to the first power supply and
Second power supply；First power supply is to the interior machine control circuit power supply in the interior machine controller (10)；
On the one hand second power supply supplies after the first pressure stabilizing to the interior machine communicating circuit in the interior machine controller (10)
On the other hand electricity is divided into two-way to outer machine controller (20) power supply in the inside and outside machine controller；Wherein, all the way directly to institute
The outer machine control circuit power supply in outer machine controller (20) is stated, another way is after the second pressure stabilizing in the outer machine controller (20)
Outer machine communicating circuit power supply.
8. device according to claim 7, which is characterized in that wherein,
First pressure stabilizing, comprising: second power supply is in the interior machine controller (10) through a power module
(30) the first pressure stabilizing is carried out；And/or
Second pressure stabilizing, comprising: second power supply is set in the interior machine controller (10) and the outer machine control
Another power module (30) between device (20) processed carries out the second pressure stabilizing；
And/or
It is isolated between the ground of the interior machine communicating circuit power supply and the ground of the interior machine control circuit power supply and separately sets
It sets, is isolated between the ground of the outer machine communicating circuit power supply and the ground of the outer machine control circuit power supply and separately sets
It sets；Also, it is isolated between the ground of the interior machine communicating circuit power supply and the ground of the outer machine communicating circuit power supply point
It opens up and sets.
9. device according to claim 8, which is characterized in that the power module (30), comprising: Voltage stabilizing module or DC-
DC chip.
10. device described in one of -9 according to claim 1, which is characterized in that the communicating circuit, comprising: isolated transceiver；
The isolated transceiver, comprising: RS485 communications transceiver.
11. a kind of air-conditioning characterized by comprising the communication device of machine inside and outside the air-conditioning as described in claim 1-10 is any.
12. the means of communication of machine inside and outside a kind of air-conditioning as claimed in claim 11 characterized by comprising
By isolating device, the communicating circuit of the inside and outside machine controller of the air-conditioning is isolated with control circuit；
By power supply unit, under the communicating circuit of the inside and outside machine controller and the segregate situation of control circuit, respectively
The communicating circuit of the inside and outside machine controller and control circuit power supply.
13. according to the method for claim 12, which is characterized in that the communicating circuit of the inside and outside machine controller of the air-conditioning
It is isolated with control circuit, comprising:
By the first isolation strip (11), to the interior machine communicating circuit and interior machine of machine controller (10) interior in the inside and outside machine controller
Control circuit is isolated；
By the second isolation strip (21), to the outer machine communicating circuit and outer machine of the inside and outside machine controller China and foreign countries machine controller (20)
Control circuit is isolated.
14. method according to claim 12 or 13, which is characterized in that be respectively the communication electricity of the inside and outside machine controller
Road and control circuit power supply, comprising:
Will in the inside and outside machine controller interior machine controller (10) DC power supply, be separately converted to the first power supply and
Second power supply；Make first power supply to the interior machine control circuit power supply in the interior machine controller (10)；
Make second power supply, on the one hand to the interior machine communicating circuit in the interior machine controller (10) after the first pressure stabilizing
On the other hand power supply is divided into two-way to outer machine controller (20) power supply in the inside and outside machine controller；Wherein, all the way directly to
Outer machine control circuit power supply in the outer machine controller (20), another way give the outer machine controller (20) after the second pressure stabilizing
In outer machine communicating circuit power supply.
15. according to the method for claim 14, which is characterized in that wherein,
It is isolated between the ground of the interior machine communicating circuit power supply and the ground of the interior machine control circuit power supply and separately sets
It sets, is isolated between the ground of the outer machine communicating circuit power supply and the ground of the outer machine control circuit power supply and separately sets
It sets；Also, it is isolated between the ground of the interior machine communicating circuit power supply and the ground of the outer machine communicating circuit power supply point
It opens up and sets.
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|---|---|---|---|
| CN201810878445.8A CN109140700B (en) | 2018-08-03 | 2018-08-03 | The means of communication of the communication device of machine, air-conditioning and its inside and outside machine inside and outside a kind of air-conditioning |
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|---|---|---|---|
| CN201810878445.8A CN109140700B (en) | 2018-08-03 | 2018-08-03 | The means of communication of the communication device of machine, air-conditioning and its inside and outside machine inside and outside a kind of air-conditioning |
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| JP2003004283A (en) * | 2002-05-24 | 2003-01-08 | Hitachi Ltd | Air conditioner |
| CN202661799U (en) * | 2012-05-10 | 2013-01-09 | 珠海格力电器股份有限公司 | Inter-board communication network control circuit device and air conditioner outdoor unit control circuit apparatus |
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|---|---|
| CN109140700B (en) | 2019-12-03 |
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