CN110588688A - Clock control device, air conditioning system and clock control method thereof - Google Patents

Clock control device, air conditioning system and clock control method thereof Download PDF

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Publication number
CN110588688A
CN110588688A CN201910899801.9A CN201910899801A CN110588688A CN 110588688 A CN110588688 A CN 110588688A CN 201910899801 A CN201910899801 A CN 201910899801A CN 110588688 A CN110588688 A CN 110588688A
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China
Prior art keywords
controllers
controller
powered
clock
module
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Granted
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CN201910899801.9A
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Chinese (zh)
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CN110588688B (en
Inventor
陈万兴
郭玉坚
唐政清
钟金扬
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D27/00—Heating, cooling, ventilating, or air-conditioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/02—Ventilation; Air-conditioning
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41835—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by programme execution
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
    • G05B19/41855—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication by local area network [LAN], network structure
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/4189—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the transport system

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a clock control device, an air conditioning system and a clock control method thereof, wherein the device comprises: a switching module; the switching module is used for switching the communication line of each controller into a connecting line under the condition that the controllers of more than two air conditioners are powered off, so as to: the charging and discharging modules in all the power-off controllers are connected in parallel through the connecting lines, and the clock module of one appointed controller is powered through the charging and discharging modules in all the power-off controllers; and after all the power-off controllers are powered on, switching the connecting lines back to the communication lines so as to: synchronizing clock information of the clock module of the designated controller to other controllers of all powered down controllers through the communication line of the designated controller. The scheme of the invention can solve the problem that the endurance of the clock chip is weak to influence the timing accuracy, and achieves the effect of improving the endurance of the clock chip to improve the timing accuracy.

Description

Clock control device, air conditioning system and clock control method thereof
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a clock control device, an air conditioner system and a clock control method thereof, in particular to a golden capacitor power supply network for improving the cruising ability of a real-time clock chip and an implementation device of a time synchronization mechanism, an air conditioner, a golden capacitor power supply network for improving the cruising ability of the real-time clock chip and an implementation method of the time synchronization mechanism.
Background
The controller of the current air conditioner is usually provided with a Real Time Clock (RTC) to provide accurate timing services, such as providing a calendar, system time and the like. When the controller is powered off, a gold capacitor battery arranged in the controller can usually maintain the power supply capacity of 1-4 weeks to ensure the normal timing of the clock chip. In the situation that the power failure time is more than 3-12 months when a train air conditioner, a ship air conditioner and the like are normally stopped and overhauled, it is very difficult to require accurate time function when the train air conditioner, the ship air conditioner and the like are powered on, and under the condition of no networking, the clock of each controller needs to be reset and calibrated mostly.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a clock control device, an air conditioning system and a clock control method thereof to solve the problem that the endurance of a clock chip is weak so as to influence the timing accuracy, and achieve the effects of improving the endurance of the clock chip and improving the timing accuracy.
The invention provides a clock control device, comprising: a switching module; the switching module is used for switching the communication line of each controller into a connecting line under the condition that the controllers of more than two air conditioners are powered off, so as to: the charging and discharging modules in all the power-off controllers are connected in parallel through the connecting lines, and the clock module of one appointed controller is powered through the charging and discharging modules in all the power-off controllers; and after all the power-off controllers are powered on, switching the connecting lines back to the communication lines so as to: synchronizing clock information of the clock module of the designated controller to other controllers of all powered down controllers through the communication line of the designated controller.
Optionally, the switching module is connected to a bus of the air conditioning system, and each air conditioner in the air conditioning system is connected to the corresponding controller through the bus of the air conditioning system; and/or, the clock module, comprising: a real time clock chip.
Optionally, the charge-discharge module includes: a gold capacitor; the switching module includes: a gold capacitor parallel line switcher; the gold capacitors of more than two controllers are preset in a parallel connection mode but are not really connected in parallel, and the gold capacitors of more than two controllers are connected in parallel only under the condition that communication lines of more than two controllers are connecting lines and more than two controllers are powered off.
Optionally, synchronizing clock information of the clock module of the designated controller to other ones of all powered-down controllers, comprising: and uploading the clock information of the clock module of the designated controller to a bus of the air conditioning system through a communication line of the designated controller, so as to synchronize the clock information to other controllers in all the power-off controllers in a broadcasting manner through the bus.
Optionally, wherein switching the communication line of each controller to a connection line comprises: converting two communication lines Tx and Rx of each controller in a bus of an air-conditioning system into two connecting lines CL + and CL-, so as to connect charge and discharge modules of all power-off controllers in parallel through the two connecting lines CL + and CL-; one connecting line CL + is connected to the anode of the charge-discharge module, and the other connecting line CL-is connected to the cathode of the charge-discharge module; and/or, the designation of a designated controller among all the power-off controllers comprises: and presetting a clock module which is not disconnected with the appointed controller when power is off, so as to realize the appointing of the appointed controller in all the power-off controllers.
Optionally, switching the connection line back to the communication line comprises: and converting the two connecting lines CL + and CL-into two communication lines Tx and Rx of each controller in the bus of the air-conditioning system, wherein one communication line Tx is connected to the chip communication receiving end of the corresponding controller, and the other communication line Rx is connected to the chip communication sending end of the corresponding communication line.
In accordance with another aspect of the present invention, there is provided an air conditioning system including: the clock control apparatus described above.
In another aspect, the present invention provides a clock control method for an air conditioning system, including: through the switching module, under the circumstances of the controller outage of more than two air conditioners, switch the communication line of every controller into the connecting wire to: the charging and discharging modules in all the power-off controllers are connected in parallel through the connecting lines, and the clock module of one appointed controller is powered through the charging and discharging modules in all the power-off controllers; and after all the power-off controllers are powered on, switching the connecting lines back to the communication lines so as to: synchronizing clock information of the clock module of the designated controller to other controllers of all powered down controllers through the communication line of the designated controller.
Optionally, wherein the clock module includes: a real-time clock chip; and/or, the charge-discharge module comprises: a gold capacitor; the switching module includes: a gold capacitor parallel line switcher; the gold capacitors of more than two controllers are preset in a parallel connection mode but are not really connected in parallel, and the gold capacitors of more than two controllers are connected in parallel only under the condition that communication lines of more than two controllers are connecting lines and more than two controllers are powered off.
Optionally, synchronizing clock information of the clock module of the designated controller to other ones of all powered-down controllers, comprising: and uploading the clock information of the clock module of the designated controller to a bus of the air conditioning system through a communication line of the designated controller, so as to synchronize the clock information to other controllers in all the power-off controllers in a broadcasting manner through the bus.
Optionally, wherein switching the communication line of each controller to a connection line comprises: converting two communication lines Tx and Rx of each controller in a bus of an air-conditioning system into two connecting lines CL + and CL-, so as to connect charge and discharge modules of all power-off controllers in parallel through the two connecting lines CL + and CL-; one connecting line CL + is connected to the anode of the charge-discharge module, and the other connecting line CL-is connected to the cathode of the charge-discharge module; and/or, the designation of a designated controller among all the power-off controllers comprises: and presetting a clock module which is not disconnected with the appointed controller when power is off, so as to realize the appointing of the appointed controller in all the power-off controllers.
Optionally, switching the connection line back to the communication line comprises: and converting the two connecting lines CL + and CL-into two communication lines Tx and Rx of each controller in the bus of the air-conditioning system, wherein one communication line Tx is connected to the chip communication receiving end of the corresponding controller, and the other communication line Rx is connected to the chip communication sending end of the corresponding communication line.
According to the scheme, under the condition that the controller of the air conditioner is powered off for a long time, the endurance capacity of a single real-time clock chip is improved by using the gold capacitor power supply network and the time synchronization mechanism, the timing accuracy of more than two controllers is guaranteed, and the cost and the occupied space caused by the need of a plurality of gold capacitors are avoided.
Furthermore, the scheme of the invention ensures that more than one controller can still accurately time when the power is off by utilizing the gold capacitor power supply network and the time synchronization mechanism under the condition that the controller is powered off for a long time, and does not need to set a plurality of gold capacitors connected in parallel for each controller, thereby having simple and convenient realization mode and low cost.
Furthermore, according to the scheme of the invention, under the condition that the controllers are powered off for a long time, the communication lines of the controllers are switched to the parallel connection lines of the gold capacitors in the controllers, so that the gold capacitors in the controllers are connected in parallel, and the gold capacitors in the controllers are used for supplying power to the real-time clock chip of one controller, thereby ensuring that more than one controller can still accurately time when the controllers are powered off, and the controller has the advantages of simple structure and low cost.
Therefore, according to the scheme of the invention, after more than two controllers are powered off, the communication line of each controller is switched to be the connecting line which is used for being connected with the gold capacitor in parallel; after the gold capacitors in more than two controllers are connected in parallel through the connecting wire of each controller, the gold capacitors in more than two controllers supply power to a real-time clock chip of one controller in more than two controllers so as to record real-time; after more than two controllers are powered on, the connecting line of each controller is switched into a communication line, and the real-time of one controller is synchronized to the other controllers through the communication line; the problem that the time-keeping accuracy is affected due to the fact that the cruising ability of the clock chip is weak is solved, and the effect of improving the cruising ability of the clock chip to improve the time-keeping accuracy is achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a clock control apparatus according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a clock control method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a clock standard cell circuit according to an embodiment of the air conditioning system of the present invention;
FIG. 4 is a schematic structural diagram of a gold capacitor parallel clock equivalent unit circuit according to an embodiment of the air conditioning system of the present invention;
FIG. 5 is a schematic diagram of an air conditioner communication network according to an embodiment of the air conditioning system of the present invention;
FIG. 6 is a schematic diagram of an air conditioner communication network in which an air conditioner communication line and a gold capacitor parallel line are switched when a controller of an embodiment of the air conditioning system is powered on;
fig. 7 is a schematic structural diagram of an air conditioner communication network in which an air conditioner communication line and a gold capacitor parallel line are switched when a controller of an embodiment of an air conditioning system is powered off.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In general, a clock circuit employed by a controller of an air conditioner may be as shown in fig. 3. In fig. 3, U1 is a real-time clock chip; y1 is a crystal oscillator; c1 is a matching capacitor matched with the crystal oscillator Y1; c2 is a filter capacitor; the C3 is a gold capacitor, and supplies power to the real-time clock chip U1 when the controller is powered off so as to ensure the normal timing of the clock chip (namely the real-time clock chip U1); d1 is a diode and is used for preventing the gold capacitor from supplying power to other 5V network loads during power failure to cause too fast discharge; r1 is a resistance matched according to discharge time; r2 and R3 are protection resistors; r4 and R5 are pull-up and pull-down resistors.
The gold capacitor or gold capacitor (farad capacitor, super capacitor) is a capacitor made by using the principle of forming an induction double-charge layer between an electronic conductor active carbon and an ionic conductor organic or inorganic electrolyte, and has the characteristics of small volume, large capacity, good voltage memory characteristic, high reliability and the like.
Specifically, when the controller of the air conditioner is powered on, the real-time clock (i.e., the real-time clock chip U1) is powered by the common power supply, and the gold capacitor C3 is charged at the same time. When the controller of the air conditioner is powered off, the real-time clock (namely the real-time clock chip U1) is powered by the gold capacitor C3. The controller main chip of the air conditioner reads the time information through the control line SCL and the data line SDA of the real-time clock chip U1. The circuit shown in fig. 3 only has one gold capacitor C3 to supply power after power is cut off, so that the fixed endurance is limited.
Gold capacitor energy storage W ═ CU2A, wherein C ═ epsilonrε0A/d, U is an applied voltage, epsilonrIs a relative dielectric constant,. epsilon0The dielectric constant is vacuum, A is the plate area and d is the dielectric thickness. As shown in fig. 4, by connecting n identical gold capacitors in parallel, theoretically, the electrode plate area a of the gold capacitor will be increased by n times, which results in the capacitance value C of the gold capacitor being increased by n times, and finally, the stored energy W of the gold capacitor is increased by n times, and the voltage U of the gold capacitor is unchanged, where n is a natural number. However, the controller of an air conditioner can only accommodate one gold capacitor at most in space and economic aspects. In order to enable a controller of a single air conditioner to obtain n times of power supply capacity, the invention provides a gold capacitor power supply network and a time synchronization mechanism for improving the cruising capacity of a real-time clock chip.
According to an embodiment of the present invention, there is provided a clock control apparatus. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The clock control device can be applied to an air conditioning system, and the air conditioning system can comprise: each air conditioner corresponds to one controller, and each air conditioner is connected with the corresponding controller through a bus of an air conditioning system. Each controller may include: the clock module and the charge-discharge module. The clock module can be used for providing timing service for the controller. The charging and discharging module can be used for charging under the condition that the controller is powered on and supplying power to the clock module under the condition that the controller is powered off.
The clock control device may include: and a switching module.
One end of the switching module is connected with the bus, and the other end of the switching module is connected with the communication module and the charging and discharging module of the clock module. The switching module is used for switching parallel lines (such as gold capacitor parallel lines) of the communication line and the charging and discharging module, namely the communication line can play a role of the communication line per se and also can play a role of the parallel lines, the communication line plays a role of the communication line per se under the condition that the unit is not powered off (such as under the condition that the unit is powered on and runs), and the communication line plays a role of the parallel lines for enabling the charging and discharging module to be connected in parallel under the condition that the unit is powered off (such as under the condition that the unit is powered off).
For example: the switching module switches the line direction of the communication line, such as a two-way switch, and the line is accessed to the communication module when the mobile phone is started at ordinary times; when the controller is shut down, the charge and discharge point modules (such as gold capacitor modules) of all the controllers are connected in parallel, and power is supplied to the clock module of one of the controllers. That is, in each controller, there are included: the power supply system comprises a switching module, a communication module and a charge-discharge module (such as a gold capacitor charge-discharge module), wherein the charge-discharge module supplies power to a clock module (such as a real-time clock chip) after the unit is powered off, the clock module supplies power to the unit when the unit is powered on, and the unit charges the charge-discharge module at the same time.
The switching module can be used for processing at least the following two aspects.
In a first aspect, when the controllers of two or more air conditioners are powered off, the communication line of each controller is switched to a connection line (i.e., a connection line that can be used to connect the charge and discharge modules in parallel in all the powered-off controllers) so as to: the charging and discharging modules in all the power-off controllers are connected in parallel through the connecting lines, and the clock module of one designated controller is powered through the charging and discharging modules in all the power-off controllers (namely, the clock module of one designated controller in all the power-off controllers is powered), so that the clock module of the designated controller records real-time to realize timing service. The designated controller is pre-designated and can be flexibly designated. And the number of the first and second groups,
alternatively, switching the communication line of each controller to a connection line may include: the two communication lines Tx and Rx of each controller in the bus of the air conditioning system are converted into two connecting lines CL + and CL-, so that the charging and discharging modules of all the power-off controllers are connected in parallel through the two connecting lines CL + and CL-.
One connecting line CL + is connected to the anode of the charge-discharge module, and the other connecting line CL-is connected to the cathode of the charge-discharge module.
For example: as shown in fig. 6, the n controller communication line of the air conditioner is connected to a gold capacitor parallel line switcher (n is 1,2,3 …), and functions as: when the controller is powered on, one communication line Tx is connected to the chip communication receiving end, and the other communication line Rx is connected to the chip communication sending end; when the controller is powered off, one communication line Tx is used as a common connecting line CL +, the other communication line Rx is used as a common connecting line CL-, CL + is connected to the positive electrode of the gold capacitor, and CL-is connected to the negative electrode of the gold capacitor, and the main chip program can set whether to simultaneously cut off the power supply of the corresponding real-time clock chip.
For example: fig. 6 shows that when the power is turned on, the two communication lines Tx and Rx of the bus are still the communication lines, and at this time, the air conditioner controller communication line is connected to the gold capacitor parallel line switcher to forward the bus communication data to the chip receiving end (i.e., the chip communication receiving end) to implement normal control and data interaction. As shown in fig. 7, in case of power failure, two communication lines Tx and Rx of the bus are converted into CL + and CL-by the air conditioner controller communication line and the gold capacitor parallel line switcher, and the gold capacitors of 1,2,3 … n controllers are connected in parallel, and one of them is designated, such as the first controller (the air conditioner controller communication line and the gold capacitor parallel line switcher can be set to be not powered off at the same time to realize designation by the main chip program), so that the real-time clock chip of the first controller continuously supplies power after power failure, and the rest n-1 controllers stop working.
Therefore, when the controller is powered off, the two communication lines in the bus are converted into two connecting lines, so that the multifunctional use of the two communication lines is realized, and the multifunctional bus is low in cost and high in reliability.
Optionally, the designating of a designated controller from all the power-off controllers may include: through a main chip program of the air conditioning system, the clock module of the designated controller is not disconnected at the same time when power is off, and designation of the designated controller in all the power-off controllers is achieved.
Therefore, the controller can be flexibly designated, flexible setting of the clock module is not required to be disconnected under the condition that different users power off the controller can be met, and convenience and reliability are realized.
In a second aspect, after all the powered down controllers are powered up, the connection lines are switched back to the communication lines (i.e., the connection lines of all the powered down controllers are switched to the communication lines of all the powered down controllers) to: and synchronizing the clock information of the clock module of the designated controller to other controllers in all the power-off controllers through the communication line of the designated controller so as to realize synchronous timing of all the power-off controllers.
For example: in order to solve the problem that the real-time clock chip endurance can only maintain 1-4 weeks for timing when a controller (such as a controller of an air conditioner) is powered off for a long time, the scheme of the invention provides a gold-capacitor power supply network and a time synchronization mechanism for improving the real-time clock chip endurance, so that the endurance of a single real-time clock chip can be improved under the condition that the controller is powered off for a long time, for example, n times of endurance can be improved, and the timing capability of n-4 n weeks for timing is improved. After the controllers are powered off, the communication lines of the controllers are switched to be connecting lines which are connected with the gold capacitors in parallel, and the gold capacitors in the n controllers are connected in parallel to supply power to the real-time clock chip of any one controller (such as the 1 st controller); after the controller is electrified, the connecting line with the gold capacitor connected in parallel is switched to the communication line, and the real-time of the 1 st controller is synchronized to the rest n-1 controllers through the communication line, so that the effect of increasing the cruising ability of the real-time clock chip by n times is realized singly.
Therefore, by the switching module, under the condition that more than two controllers are powered off, the communication line of the controllers is switched to the parallel connection line of the charge and discharge modules in the controllers in parallel, so that the parallel connection of the charge and discharge modules in the controllers is realized, and the accurate timing of the controllers can be ensured by utilizing the power supply network and the time synchronization mechanism of the charge and discharge modules when the controllers are powered off.
Optionally, switching the connection line back to the communication line may comprise: and converting the two connecting lines CL + and CL-into two communication lines Tx and Rx of each controller in the bus of the air-conditioning system, wherein one communication line Tx is connected to the chip communication receiving end of the corresponding controller, and the other communication line Rx is connected to the chip communication sending end of the corresponding communication line.
For example: as shown in fig. 7, when the first controller is powered again (all controllers should be powered at this time), CL + and CL-of all controllers are converted into Tx and Rx by the air conditioner controller communication line and the gold capacitor parallel line switcher, and the first controller broadcasts time information to the remaining n-1 controllers through Tx and Rx, time synchronization setting and calibration.
Thus, signal communication is conveniently and reliably achieved by converting the functions of the two connecting wires back to the functions of the two communication wires in the bus when the controller is powered on.
Optionally, synchronizing the clock information of the clock module of the designated controller to other ones of all the powered-down controllers may include: enabling the appointed controller to upload the clock information of the clock module of the appointed controller to a bus of the air conditioning system through a communication line of the appointed controller, and synchronizing the clock information to other controllers in all the power-off controllers in a broadcasting mode through the bus.
For example: the real-time of the 1 st controller is synchronized to the synchronization process in the remaining n-1 controllers through the communication line, and may include: because all air conditioners and controllers are on the same bus, the rest n-1 controllers supply power to the 1 st controller in a centralized way after power failure. After power-on, the 1 st station controller synchronizes its own time information to the remaining n-1 stations in a broadcast manner through the bus.
Therefore, the clock information is synchronized in a broadcasting mode, and the consistency and the accuracy of the clock information in each controller are guaranteed.
The switching module is connected to a bus of the air conditioning system, and each air conditioner in the air conditioning system is connected with the corresponding controller through the bus of the air conditioning system. Wherein, the bus may include: a power line and a communication line.
For example: as shown in fig. 7, the controller of the air conditioner n (i.e., air conditioner n) controls the corresponding air conditioner n (n is 1,2,3 …). The air conditioner controller and the air conditioner are connected to the same bus. The bus typically contains two power lines, as well as two communication lines. The two power lines are used for supplying power to the controller by the air conditioner; the two communication lines Tx and Rx are used for controlling the corresponding air conditioner n by the air conditioner n controller, and can also realize the communication between the air conditioner controllers.
For example: two communication lines Tx and Rx as normal communication lines when the controller is powered on; when the controller is powered off, the gold capacitor parallel connection line (namely, the connection line for the real gold capacitor parallel connection) is used.
Therefore, the switching module is connected to the bus of the air conditioning system, the function switching control of the communication line in the bus can be conveniently realized, the structure is simple, and the reliable timing service of the clock module can be reliably realized under the condition that the controller is powered off.
Optionally, in the scheme of the present invention, the setting modes of the clock module, the charge-discharge module, and the switching module may include any one or more of the following setting modes.
The first setting mode is as follows: the clock module may include: a real time clock chip.
The second setting mode is as follows: the charge-discharge module may include: and (4) a gold capacitor.
The third setting mode is as follows: the switching module may include: gold capacitance parallel line switcher.
Therefore, through the clock module, the charging and discharging module and the switching module in various forms, the flexibility and convenience of clock control can be improved.
Alternatively, the gold capacitors of two or more controllers are pre-arranged in parallel but not really connected in parallel, and the gold capacitors of two or more controllers are connected in parallel only when the communication lines of the two or more controllers are connecting lines and the two or more controllers are powered off.
Therefore, the parallel connection is realized by the parallel connection mode between the gold capacitors of the two or more controllers under the condition that the controllers are powered off, the clock module of one controller can be charged by the gold capacitors of the two or more controllers in parallel, the cruising ability of the clock module is improved, and the timing accuracy of the air conditioning system where the two or more air conditioners are located is improved.
Through a large number of tests, the technical scheme of the invention improves the endurance of a single real-time clock chip by utilizing a gold capacitor power supply network and a time synchronization mechanism under the condition that the controller is powered off for a long time, ensures the timing accuracy of more than two controllers, and avoids the cost increase and the space occupation caused by the need of a plurality of gold capacitors.
According to the embodiment of the invention, an air conditioning system corresponding to the clock control device is also provided. The air conditioning system may include: the clock control apparatus described above.
In an optional embodiment, in order to solve the problem that the real-time clock chip endurance can only maintain 1-4 weeks for timing when a controller (such as a controller of an air conditioner) is powered off for a long time, the scheme of the invention provides a gold-capacitor power supply network and a time synchronization mechanism for improving the real-time clock chip endurance, so that the endurance of a single real-time clock chip can be improved, for example, n times of the endurance can be improved under the condition that the controller is powered off for a long time, and thus the timing capability of n-4 n weeks for timing is improved.
The scheme of the application is suitable for multi-split air conditioners, train air conditioners, ship air conditioners and the like.
In an optional example, in the scheme of the present invention, after the controller is powered off, the communication line is switched to the connection line for being connected in parallel with the gold capacitors, and the gold capacitors in the n controllers are connected in parallel to supply power to the real-time clock chip of any one controller (for example, station 1); after the controller is electrified, the connecting line with the gold capacitor connected in parallel is switched to the communication line, and the real-time of the 1 st controller is synchronized to the rest n-1 controllers through the communication line, so that the effect of increasing the cruising ability of the real-time clock chip by n times is realized singly.
Wherein, the real-time of the 1 st controller is synchronized to the synchronization process in the rest n-1 controllers through the communication line, and the synchronization process may include: because all air conditioners and controllers are on the same bus, the rest n-1 controllers supply power to the 1 st controller in a centralized way after power failure. After power-on, the 1 st station controller synchronizes its own time information to the remaining n-1 stations in a broadcast manner through the bus. Wherein, if the air conditioner is a multi-split air conditioner, n is a natural number greater than 1.
In an alternative embodiment, a specific implementation process of the scheme of the present invention can be exemplarily described with reference to the examples shown in fig. 7 to 7.
In an alternative specific example, as shown in fig. 7, the controller of the air conditioner n (i.e., air conditioner n) controls the corresponding air conditioner n (n ═ 1,2,3 …). The air conditioner controller and the air conditioner are connected to the same bus. The bus typically contains two power lines, as well as two communication lines. The two power lines are used for supplying power to the controller by the air conditioner; the two communication lines Tx and Rx are used for controlling the corresponding air conditioner n by the air conditioner n controller, and can also realize the communication between the air conditioner controllers. The bus CAN be CAN, RS485, Ethernet, etc.
Wherein, the two communication lines Tx and Rx are used as common communication lines when the controller is electrified; when the controller is powered off, the gold capacitor parallel connection line (namely, the connection line for the real gold capacitor parallel connection) is used.
As shown in fig. 6, the n controller communication line of the air conditioner is connected to a gold capacitor parallel line switcher (n is 1,2,3 …), and functions as: when the controller is powered on, one communication line Tx is connected to the chip communication receiving end, and the other communication line Rx is connected to the chip communication sending end; when the controller is powered off, one communication line Tx is used as a common connecting line CL +, the other communication line Rx is used as a common connecting line CL-, CL + is connected to the positive electrode of the gold capacitor, and CL-is connected to the negative electrode of the gold capacitor, and the main chip program can set whether to simultaneously cut off the power supply of the corresponding real-time clock chip.
Fig. 6 shows that when the power is turned on, the two communication lines Tx and Rx of the bus are still the communication lines, and at this time, the air conditioner controller communication line is connected to the gold capacitor parallel line switcher to forward the bus communication data to the chip receiving end (i.e., the chip communication receiving end) to implement normal control and data interaction.
As shown in fig. 7, in case of power failure, two communication lines Tx and Rx of the bus are converted into CL + and CL-by the air conditioner controller communication line and the gold capacitor parallel line switcher, and the gold capacitors of 1,2,3 … n controllers are connected in parallel, and one of them is designated, such as the first controller (the air conditioner controller communication line and the gold capacitor parallel line switcher can be set to be not powered off at the same time to realize designation by the main chip program), so that the real-time clock chip of the first controller continuously supplies power after power failure, and the rest n-1 controllers stop working.
When the first controller is powered again (all the controllers should be powered at this time), the CL + and CL-of all the controllers are converted into Tx and Rx by the air conditioner controller communication line and the gold capacitor parallel line switcher, and the first controller broadcasts the time information to the remaining n-1 controllers through Tx and Rx, time synchronization setting and calibration.
Since the processing and functions of the air conditioning system of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus shown in fig. 1, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention ensures that a plurality of controllers can still accurately time when the power is off by utilizing the gold capacitor power supply network and the time synchronization mechanism under the condition that the controllers are powered off for a long time, and does not need to set a plurality of gold capacitors connected in parallel for each controller, thereby having simple and convenient realization mode and low cost.
According to an embodiment of the present invention, there is also provided a clock control method of an air conditioning system corresponding to the air conditioning system, as shown in fig. 2, which is a schematic flow chart of an embodiment of the method of the present invention. The clock control method of the air conditioning system can be applied to the air conditioning system, and the air conditioning system can comprise the following steps: each air conditioner corresponds to one controller, and each air conditioner is connected with the corresponding controller through a bus of an air conditioning system. Each controller may include: the clock module and the charge-discharge module. The clock module can be used for providing timing service for the controller. The charging and discharging module can be used for charging under the condition that the controller is powered on and supplying power to the clock module under the condition that the controller is powered off.
As shown in fig. 2, the clock control method may include step S110 and step S120.
At step S110, by the switching module, in the case that the controllers of more than two air conditioners are powered off, the communication line of each controller is switched to a connection line (i.e. a connection line in which the charge and discharge modules in all the powered-off controllers are connected in parallel) to: the charging and discharging modules in all the power-off controllers are connected in parallel through the connecting lines, and the clock module of one designated controller is powered through the charging and discharging modules in all the power-off controllers (namely, the clock module of one designated controller in all the power-off controllers is powered), so that the clock module of the designated controller records real-time to realize timing service. The designated controller is pre-designated and can be flexibly designated. And the number of the first and second groups,
alternatively, switching the communication line of each controller to a connection line may include: the two communication lines Tx and Rx of each controller in the bus of the air conditioning system are converted into two connecting lines CL + and CL-, so that the charging and discharging modules of all the power-off controllers are connected in parallel through the two connecting lines CL + and CL-.
One connecting line CL + is connected to the anode of the charge-discharge module, and the other connecting line CL-is connected to the cathode of the charge-discharge module.
For example: as shown in fig. 6, the n controller communication line of the air conditioner is connected to a gold capacitor parallel line switcher (n is 1,2,3 …), and functions as: when the controller is powered on, one communication line Tx is connected to the chip communication receiving end, and the other communication line Rx is connected to the chip communication sending end; when the controller is powered off, one communication line Tx is used as a common connecting line CL +, the other communication line Rx is used as a common connecting line CL-, CL + is connected to the positive electrode of the gold capacitor, and CL-is connected to the negative electrode of the gold capacitor, and the main chip program can set whether to simultaneously cut off the power supply of the corresponding real-time clock chip.
For example: fig. 6 shows that when the power is turned on, the two communication lines Tx and Rx of the bus are still the communication lines, and at this time, the air conditioner controller communication line is connected to the gold capacitor parallel line switcher to forward the bus communication data to the chip receiving end (i.e., the chip communication receiving end) to implement normal control and data interaction. As shown in fig. 7, in case of power failure, two communication lines Tx and Rx of the bus are converted into CL + and CL-by the air conditioner controller communication line and the gold capacitor parallel line switcher, and the gold capacitors of 1,2,3 … n controllers are connected in parallel, and one of them is designated, such as the first controller (the air conditioner controller communication line and the gold capacitor parallel line switcher can be set to be not powered off at the same time to realize designation by the main chip program), so that the real-time clock chip of the first controller continuously supplies power after power failure, and the rest n-1 controllers stop working.
Therefore, when the controller is powered off, the two communication lines in the bus are converted into two connecting lines, so that the multifunctional use of the two communication lines is realized, and the multifunctional bus is low in cost and high in reliability.
Optionally, the designating of a designated controller from all the power-off controllers may include: through a main chip program of the air conditioning system, the clock module of the designated controller is not disconnected at the same time when power is off, and designation of the designated controller in all the power-off controllers is achieved.
Therefore, the controller can be flexibly designated, flexible setting of the clock module is not required to be disconnected under the condition that different users power off the controller can be met, and convenience and reliability are realized.
At step S120, after all the powered-off controllers are powered on, the connection line is switched back to the communication line (i.e. the connection line of all the powered-off controllers is switched to the communication line of all the powered-off controllers) to: and synchronizing the clock information of the clock module of the designated controller to other controllers in all the power-off controllers through the communication line of the designated controller so as to realize synchronous timing of all the power-off controllers.
For example: in order to solve the problem that the real-time clock chip endurance can only maintain 1-4 weeks for timing when a controller (such as a controller of an air conditioner) is powered off for a long time, the scheme of the invention provides a gold-capacitor power supply network and a time synchronization mechanism for improving the real-time clock chip endurance, so that the endurance of a single real-time clock chip can be improved under the condition that the controller is powered off for a long time, for example, n times of endurance can be improved, and the timing capability of n-4 n weeks for timing is improved. After the controllers are powered off, the communication lines of the controllers are switched to be connecting lines which are connected with the gold capacitors in parallel, and the gold capacitors in the n controllers are connected in parallel to supply power to the real-time clock chip of any one controller (such as the 1 st controller); after the controller is electrified, the connecting line with the gold capacitor connected in parallel is switched to the communication line, and the real-time of the 1 st controller is synchronized to the rest n-1 controllers through the communication line, so that the effect of increasing the cruising ability of the real-time clock chip by n times is realized singly.
Therefore, by the switching module, under the condition that more than two controllers are powered off, the communication line of the controllers is switched to the parallel connection line of the charge and discharge modules in the controllers in parallel, so that the parallel connection of the charge and discharge modules in the controllers is realized, and the accurate timing of the controllers can be ensured by utilizing the power supply network and the time synchronization mechanism of the charge and discharge modules when the controllers are powered off.
Optionally, switching the connection line back to the communication line may comprise: and converting the two connecting lines CL + and CL-into two communication lines Tx and Rx of each controller in the bus of the air-conditioning system, wherein one communication line Tx is connected to the chip communication receiving end of the corresponding controller, and the other communication line Rx is connected to the chip communication sending end of the corresponding communication line.
For example: as shown in fig. 7, when the first controller is powered again (all controllers should be powered at this time), CL + and CL-of all controllers are converted into Tx and Rx by the air conditioner controller communication line and the gold capacitor parallel line switcher, and the first controller broadcasts time information to the remaining n-1 controllers through Tx and Rx, time synchronization setting and calibration.
Thus, signal communication is conveniently and reliably achieved by converting the functions of the two connecting wires back to the functions of the two communication wires in the bus when the controller is powered on.
Optionally, synchronizing the clock information of the clock module of the designated controller to other ones of all the powered-down controllers may include: enabling the appointed controller to upload the clock information of the clock module of the appointed controller to a bus of the air conditioning system through a communication line of the appointed controller, and synchronizing the clock information to other controllers in all the power-off controllers in a broadcasting mode through the bus.
For example: the real-time of the 1 st controller is synchronized to the synchronization process in the remaining n-1 controllers through the communication line, and may include: because all air conditioners and controllers are on the same bus, the rest n-1 controllers supply power to the 1 st controller in a centralized way after power failure. After power-on, the 1 st station controller synchronizes its own time information to the remaining n-1 stations in a broadcast manner through the bus.
Therefore, the clock information is synchronized in a broadcasting mode, and the consistency and the accuracy of the clock information in each controller are guaranteed.
The switching module is connected to a bus of the air conditioning system, and each air conditioner in the air conditioning system is connected with the corresponding controller through the bus of the air conditioning system. Wherein, the bus may include: a power line and a communication line.
For example: as shown in fig. 7, the controller of the air conditioner n (i.e., air conditioner n) controls the corresponding air conditioner n (n is 1,2,3 …). The air conditioner controller and the air conditioner are connected to the same bus. The bus typically contains two power lines, as well as two communication lines. The two power lines are used for supplying power to the controller by the air conditioner; the two communication lines Tx and Rx are used for controlling the corresponding air conditioner n by the air conditioner n controller, and can also realize the communication between the air conditioner controllers.
For example: two communication lines Tx and Rx as normal communication lines when the controller is powered on; when the controller is powered off, the gold capacitor parallel connection line (namely, the connection line for the real gold capacitor parallel connection) is used.
Therefore, the switching module is connected to the bus of the air conditioning system, the function switching control of the communication line in the bus can be conveniently realized, the structure is simple, and the reliable timing service of the clock module can be reliably realized under the condition that the controller is powered off.
Optionally, in the scheme of the present invention, the setting modes of the clock module, the charge-discharge module, and the switching module may include any one or more of the following setting modes.
The first setting mode is as follows: the clock module may include: a real time clock chip.
The second setting mode is as follows: the charge-discharge module may include: and (4) a gold capacitor.
The third setting mode is as follows: the switching module may include: gold capacitance parallel line switcher.
Therefore, through the clock module, the charging and discharging module and the switching module in various forms, the flexibility and convenience of clock control can be improved.
Alternatively, the gold capacitors of two or more controllers are pre-arranged in parallel but not really connected in parallel, and the gold capacitors of two or more controllers are connected in parallel only when the communication lines of the two or more controllers are connecting lines and the two or more controllers are powered off.
Therefore, the parallel connection is realized by the parallel connection mode between the gold capacitors of the two or more controllers under the condition that the controllers are powered off, the clock module of one controller can be charged by the gold capacitors of the two or more controllers in parallel, the cruising ability of the clock module is improved, and the timing accuracy of the air conditioning system where the two or more air conditioners are located is improved.
Since the processing and functions implemented by the method of the present embodiment substantially correspond to the embodiments, principles and examples of the air conditioning system, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of the present embodiment.
Through a large number of tests, the technical scheme of the embodiment is adopted, and under the condition that the controllers are powered off for a long time, the communication wires of the controllers are switched to the parallel connection wires of the gold capacitors in the controllers in parallel connection, so that the gold capacitors in the controllers are connected in parallel, the gold capacitors in the controllers are used for supplying power to the real-time clock chip of one controller, accurate timing of the controllers in the power-off process is guaranteed, and the controller is simple in structure and low in cost.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A clock control apparatus, comprising: a switching module;
the switching module is used for switching the communication line of each controller into a connecting line under the condition that the controllers of more than two air conditioners are powered off, so as to: the charging and discharging modules in all the power-off controllers are connected in parallel through the connecting lines, and the clock module of one appointed controller is powered through the charging and discharging modules in all the power-off controllers; and the number of the first and second groups,
switching the connection line back to the communication line after all the powered-off controllers are powered on to: synchronizing clock information of the clock module of the designated controller to other controllers of all powered down controllers through the communication line of the designated controller.
2. The apparatus of claim 1, wherein,
the switching module is connected to a bus of the air conditioning system, and each air conditioner in the air conditioning system is connected with the corresponding controller through the bus of the air conditioning system;
and/or the presence of a gas in the gas,
the clock module, comprising: a real time clock chip.
3. The apparatus of claim 1, wherein,
the charge-discharge module comprises: a gold capacitor;
the switching module includes: a gold capacitor parallel line switcher;
the gold capacitors of more than two controllers are preset in a parallel connection mode but are not really connected in parallel, and the gold capacitors of more than two controllers are connected in parallel only under the condition that communication lines of more than two controllers are connecting lines and more than two controllers are powered off.
4. The apparatus of any of claims 1-3, wherein synchronizing clock information of the clock module of the designated controller to other ones of all powered down controllers comprises:
and uploading the clock information of the clock module of the designated controller to a bus of the air conditioning system through a communication line of the designated controller, so as to synchronize the clock information to other controllers in all the power-off controllers in a broadcasting manner through the bus.
5. The apparatus according to one of claims 1 to 3, wherein,
switching the communication line of each controller to a connection line, comprising:
converting two communication lines Tx and Rx of each controller in a bus of an air-conditioning system into two connecting lines CL + and CL-, so as to connect charge and discharge modules of all power-off controllers in parallel through the two connecting lines CL + and CL-;
one connecting line CL + is connected to the anode of the charge-discharge module, and the other connecting line CL-is connected to the cathode of the charge-discharge module;
and/or the presence of a gas in the gas,
the designation of a designated controller among all the powered-off controllers includes: presetting a clock module which is not disconnected with the appointed controller when power is off, and realizing the appointing of the appointed controller in all the power-off controllers;
and/or the presence of a gas in the gas,
switching the connecting line back to the communication line, comprising:
and converting the two connecting lines CL + and CL-into two communication lines Tx and Rx of each controller in the bus of the air-conditioning system, wherein one communication line Tx is connected to the chip communication receiving end of the corresponding controller, and the other communication line Rx is connected to the chip communication sending end of the corresponding communication line.
6. An air conditioning system, comprising: clock control device according to any of claims 1-5.
7. A clock control method of an air conditioning system according to claim 6, comprising:
through the switching module, under the circumstances of the controller outage of more than two air conditioners, switch the communication line of every controller into the connecting wire to: the charging and discharging modules in all the power-off controllers are connected in parallel through the connecting lines, and the clock module of one appointed controller is powered through the charging and discharging modules in all the power-off controllers; and the number of the first and second groups,
switching the connection line back to the communication line after all the powered-off controllers are powered on to: synchronizing clock information of the clock module of the designated controller to other controllers of all powered down controllers through the communication line of the designated controller.
8. The method of claim 7, wherein,
the clock module, comprising: a real-time clock chip;
and/or the presence of a gas in the gas,
the charge-discharge module comprises: a gold capacitor;
the switching module includes: a gold capacitor parallel line switcher;
the gold capacitors of more than two controllers are preset in a parallel connection mode but are not really connected in parallel, and the gold capacitors of more than two controllers are connected in parallel only under the condition that communication lines of more than two controllers are connecting lines and more than two controllers are powered off.
9. The method of claim 7 or 8, wherein synchronizing clock information of the clock module of the designated controller to other ones of all powered down controllers comprises:
and uploading the clock information of the clock module of the designated controller to a bus of the air conditioning system through a communication line of the designated controller, so as to synchronize the clock information to other controllers in all the power-off controllers in a broadcasting manner through the bus.
10. The method of claim 7 or 8, wherein,
switching the communication line of each controller to a connection line, comprising:
converting two communication lines Tx and Rx of each controller in a bus of an air-conditioning system into two connecting lines CL + and CL-, so as to connect charge and discharge modules of all power-off controllers in parallel through the two connecting lines CL + and CL-;
one connecting line CL + is connected to the anode of the charge-discharge module, and the other connecting line CL-is connected to the cathode of the charge-discharge module;
and/or the presence of a gas in the gas,
the designation of a designated controller among all the powered-off controllers includes: presetting a clock module which is not disconnected with the appointed controller when power is off, and realizing the appointing of the appointed controller in all the power-off controllers;
and/or the presence of a gas in the gas,
switching the connecting line back to the communication line, comprising:
and converting the two connecting lines CL + and CL-into two communication lines Tx and Rx of each controller in the bus of the air-conditioning system, wherein one communication line Tx is connected to the chip communication receiving end of the corresponding controller, and the other communication line Rx is connected to the chip communication sending end of the corresponding communication line.
CN201910899801.9A 2019-09-23 2019-09-23 Clock control device, air conditioning system and clock control method thereof Active CN110588688B (en)

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