CN108019881B - Wire controller power supply control method, device and air conditioner for multi-connected air conditioning system - Google Patents

Abstract

The invention relates to the technical field of air conditioners, and specifically provides a method, device and an air conditioner for controlling the power supply of a wire controller of a multi-connected air-conditioning system, aiming to solve the technical problem of how to realize the automatic determination of the power supply host of the wire controller in the multi-connected air-conditioning system . For this purpose, the power supply method in the present invention firstly generates a random number for the indoor unit, and then selects a host that supplies power to the wired controller among the plurality of indoor units in a random number countdown manner. Meanwhile, the power supply device in the present invention can execute and realize the above-mentioned power supply method, and the above-mentioned power supply device is installed in the air conditioner. The technical scheme of the present invention can realize the independent competition of multiple indoor units as the power supply host without manual manual setting, thereby reducing the difficulty of installation and maintenance of the multi-connected air conditioning system.

Description

Wire controller power supply control method, device and air conditioner for multi-connected air conditioning system

technical field

The present invention relates to the technical field of air conditioners, in particular to a method and device for controlling the power supply of a wire controller of a multi-connected air conditioner system, and an air conditioner.

Background technique

The multi-connected air-conditioning system includes a multi-connected air-conditioning unit and a wire controller that is communicatively connected to the unit. The multi-connected air-conditioning unit includes multiple indoor units, of which one indoor unit acts as a host to communicate with and supply power to the wire controller. At present, the group address of each indoor unit can be set separately by manually setting the dial code, and the indoor unit with a specific group address can be used as the host. However, this method of determining the host is cumbersome and increases the installation work of the multi-line air conditioning system. . At the same time, in the case of a host failure, it is also necessary to manually change the group addresses of the failed host and the new host, which increases the difficulty of maintenance.

SUMMARY OF THE INVENTION

In order to solve the above problems in the prior art, that is, in order to solve the technical problem of how to realize the automatic determination of the power supply host of the wired controller in the multi-connected air conditioning system. The invention provides a power supply control method and device for a wire controller of a multi-connected air conditioning system, and an air conditioner.

In a first aspect, the multi-connected air-conditioning system in the present invention includes a plurality of indoor units, and a power supply line that can be communicated between the plurality of indoor units and the wired controller is provided, and the wiring of the multi-connected air-conditioning system The controller power supply control method includes:

During the start-up process of the multi-connected air-conditioning system, a preset random number generation method is used to generate random numbers corresponding to each of the indoor units;

Countdown is performed according to each of the generated random numbers;

When the countdown of any of the random numbers is completed, if the wired controller is in a non-power-receiving state, the indoor unit corresponding to the random number is controlled to supply power to the wired controller.

Further, a preferred technical solution provided by the present invention is:

After the step of "counting down respectively according to the generated random numbers", the method further includes:

Before the countdown of any random number is completed, if the wired controller is in a power receiving state, the countdown of the random number is interrupted.

Further, a preferred technical solution provided by the present invention is:

When the indoor unit supplies power to the wired controller, it also includes the steps of judging the interruption of the power supply:

If it is detected that the wired controller is in a non-power-receiving state, the power supply of the indoor unit to the wired controller is interrupted;

If it is detected that the wired controller is in a power receiving state, it is determined whether the indoor unit is electrically connected to the wired controller, and if not, the power supply from the indoor unit to the wired controller is interrupted.

Further, a preferred technical solution provided by the present invention is:

The step of "judging whether the indoor unit is electrically connected to the wired controller" specifically includes:

Control the indoor unit to send a detection signal to the wire controller, and collect the detection signal received by the wire controller; wherein, when the power supply line is a wire control line, the detection signal is a preset high and low power flat pulse signal or digital signal;

Judging whether the detection signals sent and collected by the indoor unit are consistent, if they are consistent, it is determined that the indoor unit is electrically connected to the wired controller; if not, it is determined that the indoor unit is not electrically connected to the wired controller;

or,

The step of "judging whether the indoor unit is electrically connected to the wired controller" specifically includes:

If the indoor unit receives the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit is electrically connected to the wired controller;

If the indoor unit does not receive the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit and the wired controller are not electrically connected.

Further, a preferred technical solution provided by the present invention is:

The steps of "generating random numbers corresponding to each of the indoor units by using a preset random number generating method" specifically include:

The random number N corresponding to each indoor unit is generated according to the method shown in the following formula:

N=a×T _mr +b×AD

Wherein, the T _mr is the count value of the preset timer, the AD is the output value of the AD conversion module corresponding to any temperature sensor in the current indoor unit, the a and b are both preset coefficients, and a ≠b.

In the second aspect, the wire controller power supply control device of the above-mentioned multi-connected air-conditioning system in the present invention includes:

a random number generating module, configured to generate random numbers corresponding to each of the indoor units by using a preset random number generating method during the start-up process of the multi-connected air conditioning system;

a random number timing module, configured to count down respectively according to each of the random numbers generated by the random number generation module;

The first power supply control module is configured to control the indoor unit corresponding to the random number to control the wire if the wire controller is in a non-power-receiving state when the random number timing module completes the countdown of any random number. power supply.

Further, a preferred technical solution provided by the present invention is:

The device further includes a second power supply control module and/or a third power supply control module;

The second power supply control module is configured such that the random number timing module interrupts the random number countdown if the wire controller is in a power receiving state before any random number countdown is completed;

The third power supply control module is configured to determine whether to interrupt the power supply according to the power receiving state of the wired controller after the indoor unit supplies power to the wired controller:

If it is detected that the wired controller is in a non-power-receiving state, the power supply of the indoor unit to the wired controller is interrupted;

If it is detected that the wired controller is in a power receiving state, it is determined whether the indoor unit is electrically connected to the wired controller, and if not, the power supply from the indoor unit to the wired controller is interrupted.

Further, a preferred technical solution provided by the present invention is:

The third power supply control module includes a first electrical connection determination unit and/or a second electrical connection determination unit;

The first electrical connection determination unit is configured to perform the following operations:

Control the indoor unit to send a detection signal to the wire controller, and collect the detection signal received by the wire controller;

Determine whether the detection signals sent and collected by the indoor unit are consistent, and if they are consistent, it is determined that the indoor unit is electrically connected to the wired controller, and if not, it is determined that the indoor unit is not electrically connected to the wired controller;

The second electrical connection judging unit is configured to perform the following operations:

If the indoor unit receives the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit is electrically connected to the wired controller;

If the indoor unit does not receive the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit and the wired controller are not electrically connected.

Further, a preferred technical solution provided by the present invention is:

The random number generation module is further configured to generate random numbers according to the method shown in the following formula:

N=a×T _mr +b×AD

Wherein, the T _mr is a preset timer count value, the AD is the output value of the AD conversion module corresponding to any temperature sensor in the indoor unit, the a and b are both preset coefficients, and a≠≠ b.

In a third aspect, the air conditioner of the present invention includes the wired controller power supply control device of the multi-connected air conditioning system described in the above technical solution.

Compared with the closest prior art, the above technical solution at least has the following beneficial effects:

1. The wire controller power supply control method of the multi-connected air conditioning system in the present invention generates random numbers based on the data collected by the temperature sensor of the indoor unit itself, which can increase the difference of random numbers between different indoor units

2. The power supply control method for the wired controller of the multi-connected air-conditioning system in the present invention can use the method of verifying the detection signal or obtaining the confirmation connection signal to determine whether there is electrical power between the indoor unit and the wired controller after the indoor unit supplies power to the wired controller. connection, and then determine whether to interrupt the power supply according to the judgment result, so as to determine the final power supply host.

Description of drawings

1 is a flow chart of the main steps of a method for controlling power supply by a wire controller of a multi-connected air-conditioning system according to an embodiment of the present invention;

FIG. 2 is a flow chart of the main steps of another method for controlling power supply by a wire controller of a multi-connected air-conditioning system according to an embodiment of the present invention;

3 is a schematic diagram of the main structure of a wire controller power supply control device of a multi-connected air conditioning system according to an embodiment of the present invention.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

Before the installation of the multi-connected air-conditioning system, it is usually necessary to set the main indoor unit responsible for supplying power to the wired controller in advance. However, when the main indoor unit fails, a new main indoor unit must be reset, which will inevitably increase the multi-connected air-conditioning system. maintenance difficulty. Based on this, the present invention provides a wire controller power supply control method for a multi-connected air-conditioning system, which can control each indoor unit in the multi-connected air-conditioning system to compete independently for the main indoor unit, thereby making the current main indoor unit After failure, other indoor units can also be automatically converted to the new main indoor unit.

The following describes the power supply control method for the wired controller of the multi-connected air-conditioning system in the embodiment of the present invention with reference to the accompanying drawings.

Referring to FIG. 1 , FIG. 1 exemplarily shows the main steps of a method for controlling power supply by a wire controller of a multi-connected air conditioning system in this embodiment. As shown in FIG. 1 , in this embodiment, the indoor unit in the multi-connected air-conditioning system can be controlled to supply power to the wired controller according to the following steps, wherein the multi-connected air-conditioning system can include the wired controller and a plurality of indoor units, and Connectable power supply lines are arranged between the plurality of indoor units and the wired controller.

Step S101: During the startup process of the multi-connected air conditioning system, a preset random number generation method is used to generate a random number corresponding to each indoor unit.

Specifically, in this embodiment, the random number N corresponding to each indoor unit can be generated according to the method shown in the following formula (1):

N=a×T _mr +b×AD (1)

The meaning of each parameter in formula (1) is:

T _mr is the count value of the preset timer, AD is the output value of the AD conversion module corresponding to any temperature sensor in the current indoor unit, a and b are preset coefficients, and a≠b. In this embodiment, the preset timer count value T _mr corresponding to each indoor unit may be the same or different. Meanwhile, the temperature sensor in this embodiment refers to a sensor installed in the indoor unit and used to detect temperature information such as the indoor ambient temperature or the working temperature of the indoor unit, and the AD conversion module is used to convert the analog signal collected by the temperature sensor into For digital signals, since the output errors of different AD conversion modules are not the same, the difference between different random numbers can be increased.

Step S102: Count down according to the generated random numbers.

For example, the multi-connected air-conditioning system in this embodiment includes 18 indoor units. First, 18 random numbers can be obtained according to the above step S101, and then the countdown is performed on the 18 random numbers. The countdown completion time for each random number is also different.

Step S103: When the countdown of any random number is completed, if the wire controller is in a non-power-receiving state, the indoor unit corresponding to the random number is controlled to supply power to the wire controller.

Specifically, it can be seen from the aforementioned steps S101 and S102 that the countdown completion time of the random number corresponding to each indoor unit is not the same. Therefore, when the wired controller is in a non-power-receiving state, whichever random number completes the countdown first, control its countdown. The corresponding indoor unit supplies power to the wired controller, thereby realizing the independent competition of indoor units based on random number countdown.

In a preferred implementation of this embodiment, there is also a situation that the wire controller is already in the power receiving state before the countdown of any random number is completed, indicating that an indoor unit has supplied power to the wire controller, and the random number can be interrupted immediately at this time. Countdown.

Further, in step S101 shown in FIG. 1 , there is also a situation that the random numbers corresponding to multiple indoor units are the same, and at this time, there must be multiple indoor units supplying power to the wired controller at the same time in step S103 . Based on this, in a preferred implementation of this embodiment, after step S103 shown in FIG. 1 is performed, it is also possible to judge whether to interrupt the power supply of the indoor unit to the wired controller according to the following steps, specifically:

If it is detected that the wired controller is in a non-power-receiving state, indicating that the multi-connected air conditioning system is faulty, the indoor unit can be interrupted to supply power to the wired controller.

If it is detected that the wired controller is in the power receiving state, it indicates that the power supply of the multi-connected air-conditioning system is normal, but at this time, multiple indoor units are in the power supply state, so it is necessary to judge whether the current indoor unit is electrically connected to the wired controller. The wired controller receives the power supply current output by the current indoor unit. If there is no power supply current from the current indoor unit, it means that the wired controller does not receive the power supply current output by the current indoor unit. In this case, the indoor unit can be interrupted to supply power to the wired controller.

In a preferred implementation of this embodiment, it is possible to judge whether there is an electrical connection between the current indoor unit and the wired controller according to the following steps, specifically:

(1) Control the current indoor unit to send a detection signal to the wire controller, and collect the detection signal received by the wire controller.

Specifically, in this embodiment, when the power supply line is a wire-controlled line, the detection signal can be set as a high-low-level pulse signal or a digital signal.

In this embodiment, both the internal wire controller and the indoor unit of the multi-connected air conditioning system can be provided with a signal acquisition unit, and the indoor unit and the wire controller can exchange information through the signal acquisition unit, so that the wire controller can collect the detection information sent by the indoor unit to it. The indoor unit can also collect the detection signal received by the wired controller. Further, when the power supply line is a wire-controlled wire and the communication is normal, the indoor unit can also collect the detection signal transmitted in the wire-controlled wire through the signal acquisition unit, that is, the detection signal received by the wire-controlled controller.

(2) Determine whether the detection signals sent and collected by the indoor unit are consistent. If they are consistent, it is determined that the indoor unit is electrically connected to the wired controller. If they are inconsistent, it is determined that the indoor unit is not electrically connected to the wired controller.

In another preferred implementation of this embodiment, it is also possible to judge whether there is an electrical connection between the current indoor unit and the wired controller according to the following steps, specifically:

If the current indoor unit receives the confirmation connection signal fed back by the wired controller, it is determined that the current indoor unit is electrically connected to the wired controller. If the current indoor unit does not receive the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit and the wired controller are not electrically connected.

It should be noted that although the present invention discloses two specific implementations for judging whether the current indoor unit and the wired controller are electrically connected, the protection scope of the present invention is obviously not limited to these specific implementations, and those skilled in the art can also Other judgment methods are adopted to realize the effect of judging whether the current indoor unit and the wire controller are electrically connected.

Continuing to refer to FIG. 2 , FIG. 2 exemplarily shows the main steps of another method for controlling power supply by a wire controller of a multi-connected air conditioner system in this embodiment. As shown in FIG. 2 , in this embodiment, the random number corresponding to the current indoor unit is used as an example to describe the power supply control method of the wired controller of the multi-connected air conditioning system. Power supply or interruption of power supply to the remote control:

Step S201: Count down according to the random number corresponding to the current indoor unit.

Step S202: Determine whether the wired controller is powered. Specifically, if the wired controller is in a power receiving state, step S203 is performed, and if the wired controller is not in a power receiving state, step S204 is performed.

Step S203: Interrupt random number timing.

Step S204: Determine whether the random number countdown is completed. Specifically, if the random number countdown is completed, step S205 is performed, and if the random number countdown is not completed, it continues to determine whether the random number countdown is completed.

Step S205: supply power to the wired controller. Specifically, control the current indoor unit to supply power to the wired controller.

Step S206: Determine whether the wired controller is powered. Specifically, if the wired controller is in a power receiving state, step S207 is performed, and if the wired controller is not in a power receiving state, step S210 is performed.

Step S207: Send a detection signal to the wired controller. Specifically, the current indoor unit is controlled to send a detection signal to the wired controller.

Step S208: Determine whether the sent and collected detection signals are consistent. Specifically, if the detected signal sent by the current indoor unit is consistent with the collected detection signal, step S209 is performed, and if the detected signal sent by the current indoor unit is inconsistent with the collected detection signal, step S210 is performed. The detection signal collected by the current indoor unit refers to the detection signal received by the wired controller.

Step S209: Continue to supply power to the wired controller. Specifically, the current indoor unit is controlled to continue to supply power to the wired controller, that is, the current indoor unit is the final determined master indoor unit.

Step S210: interrupt the power supply. Specifically, the current indoor unit is controlled to interrupt power supply to the wired controller.

In this embodiment, by assigning random numbers to each indoor unit, and selecting an indoor unit that supplies power to the wired controller by means of a random number countdown, the multi-connected air conditioning system can automatically supply power to the wired controller, thereby reducing the power consumption of the wired controller. Difficulty in installation and maintenance of multi-connected air conditioning systems.

In the above-mentioned embodiment, although each step is described according to the above-mentioned order, those skilled in the art can understand that, in order to realize the effect of this embodiment, different steps need not be performed in this order, and it can be performed simultaneously ( parallel) or in reverse order, simple variations of these are within the scope of the present invention.

Based on the same technical concept as the method embodiment, the embodiment of the present invention further provides a wire controller power supply control device of a multi-connected air conditioning system. The wire controller power supply control device of the multi-connected air-conditioning system will be specifically described below with reference to the accompanying drawings.

Referring to FIG. 3 , FIG. 3 exemplarily shows the main structure of a wire controller power supply control device of a multi-connected air conditioning system in this embodiment. As shown in FIG. 3 , the wire controller power supply control device of the multi-connected air conditioning system in this embodiment may include a random number generation module 11 , a random number timing module 12 and a first power supply control module 13 .

Specifically, in this embodiment, a power supply line that can be communicated is provided between a plurality of indoor units and the wired controller in the multi-connected air conditioning system. The random number generating module 11 may be configured to generate random numbers corresponding to each indoor unit by using a preset random number generating method during the start-up process of the multi-connected air-conditioning system. The random number timing module 12 may be configured to count down according to each random number generated by the random number generation module 11 . The first power supply control module 13 may be configured to control the indoor unit corresponding to the random number to supply power to the wired controller if the wired controller is in a non-power-receiving state when the random number timing module 12 completes the countdown of any random number.

Further, in this embodiment, the power supply device for the wired controller further includes a third control module, and the third control module can be configured to determine whether to interrupt the power supply according to the power receiving state of the wired controller after the indoor unit supplies power to the wired controller:

If it is detected that the wired controller is in a non-power-receiving state, the indoor unit will be interrupted to supply power to the wired controller;

If it is detected that the wired controller is in a power receiving state, it is determined whether the indoor unit is electrically connected to the wired controller, and if not, the power supply from the indoor unit to the wired controller is interrupted.

Specifically, in this embodiment, the third power supply control module may include a first electrical connection determination unit and a second electrical connection determination unit.

The first electrical connection determination unit may be configured to perform the following operations:

Control the indoor unit to send a detection signal to the wire controller, and collect the detection signal received by the wire controller; wherein, when the power supply line is a wire-controlled wire, the detection signal can be a preset high and low level pulse signal or a digital signal ;

Determine whether the detection signals sent and collected by the indoor unit are consistent. If they are consistent, it is determined that the indoor unit and the wired controller are electrically connected. If they are inconsistent, it is determined that the indoor unit and the wired controller are not electrically connected.

The second electrical connection determination unit may be configured to perform the following operations:

If the indoor unit receives the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit is electrically connected to the wired controller; if the indoor unit does not receive the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit is connected to the wired The controller is not electrically connected.

Further, in this embodiment, the random number generating module 11 may generate random numbers according to the method shown in formula (1).

The above-mentioned wired controller power supply device for a multi-connected power supply system can be used to implement the above-mentioned embodiment of the wired controller power supply control method of the above-mentioned multi-connected air-conditioning system. The technical principle, the technical problem solved and the technical effect produced are similar, Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process and related description of the multi-connected air-conditioning system described above may refer to the above-mentioned wire controller power supply control method of the multi-connected air-conditioning system. The corresponding process in the embodiment is not repeated here.

Further, based on the above-mentioned embodiment of the power supply device for the wired controller for the multi-connected power supply system, the present invention also provides an air conditioner, the air conditioner includes the above-mentioned wired controller power supply control device for the multi-connected power supply system, and further provides an air conditioner. When the multi-connected power supply system adopts this kind of air conditioner, it can realize automatic power supply to the wire controller, and reduce the difficulty of installation and maintenance.

Those skilled in the art can understand that the wire controller power supply control device of the above-mentioned multi-connected air conditioning system also includes some other well-known structures, such as a processor, a controller, a memory, etc., wherein the memory includes but is not limited to random access memory, flash memory, only memory Read memory, programmable read-only memory, volatile memory, non-volatile memory, serial memory, parallel memory or registers, etc. Processors include but are not limited to CPLD/FPGA, DSP, ARM processor, MIPS processor, etc. , these well-known structures are not shown in FIG. 3 in order to unnecessarily obscure the embodiments of the present disclosure.

It should be understood that the numbers of the various modules in FIG. 3 are merely schematic. Each module can have any number according to actual needs.

Furthermore, those skilled in the art will appreciate that although some of the embodiments described herein include certain features, but not others, included in other embodiments, that combinations of features of different embodiments are intended to be within the scope of the invention within and form different embodiments. For example, in the claims of this invention, any of the claimed embodiments may be used in any combination.

Various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all functions of some or all of the components of the server and client according to the embodiments of the present invention. The present invention may also be implemented as a device or apparatus program (eg, PC programs and PC program products) for performing part or all of the methods described herein. Such a program implementing the present invention may be stored on a PC-readable medium, or may be in the form of one or more signals. Such signals may be downloaded from Internet sites, or provided on carrier signals, or in any other form.

It should be noted that the above-described embodiments illustrate rather than limit the invention, and that alternative embodiments may be devised by those skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed PC. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. do not denote any order. These words can be interpreted as names.

So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (8)

1. A wire controller power supply control method for a multi-connected air-conditioning system, wherein the multi-connected air-conditioning system comprises a plurality of indoor units, and a plurality of the indoor units and the wire controller are arranged between the plurality of indoor units There is a connectable power supply line; the method includes: During the startup process of the multi-connected air-conditioning system, a preset random number generation method is used to generate random numbers corresponding to each of the indoor units, which specifically includes generating a random number N corresponding to each indoor unit according to the method shown in the following formula: N=a×T _mr +b×AD Wherein, the T _mr is the count value of the preset timer, the AD is the output value of the AD conversion module corresponding to any temperature sensor in the current indoor unit, the a and b are both preset coefficients, and a ≠b; Countdown is performed according to each of the generated random numbers; When the countdown of any of the random numbers is completed, if the wired controller is in a non-power-receiving state, the indoor unit corresponding to the random number is controlled to supply power to the wired controller. 2. The method according to claim 1, characterized in that, after the step of "respectively counting down according to the generated random numbers", the method further comprises: Before the countdown of any random number is completed, if the wired controller is in a power receiving state, the countdown of the random number is interrupted. 3. The method according to claim 1, characterized in that, after the indoor unit supplies power to the wired controller, it also comprises a step of judging by interrupting the power supply: If it is detected that the wired controller is in a non-power-receiving state, the power supply of the indoor unit to the wired controller is interrupted; If it is detected that the wired controller is in a power receiving state, it is determined whether the indoor unit is electrically connected to the wired controller, and if not, the power supply from the indoor unit to the wired controller is interrupted. 4. The method of claim 3, wherein The step of "judging whether the indoor unit is electrically connected to the wired controller" specifically includes: Control the indoor unit to send a detection signal to the wire controller, and collect the detection signal received by the wire controller; wherein, when the power supply line is a wire control line, the detection signal is a preset high and low power flat pulse signal or digital signal; Judging whether the detection signals sent and collected by the indoor unit are consistent, if they are consistent, it is determined that the indoor unit is electrically connected to the wired controller; if not, it is determined that the indoor unit is not electrically connected to the wired controller; or, The step of "judging whether the indoor unit is electrically connected to the wired controller" specifically includes: If the indoor unit receives the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit is electrically connected to the wired controller; If the indoor unit does not receive the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit and the wired controller are not electrically connected. 5. A wire controller power supply control device for a multi-connected air-conditioning system, wherein the system comprises a plurality of indoor units, and a communicable connection is provided between the plurality of indoor units and the wire controller. Power supply line; the device includes: a random number generating module, configured to generate random numbers corresponding to each of the indoor units by using a preset random number generating method during the start-up process of the multi-connected air conditioning system; a random number timing module, configured to count down respectively according to each of the random numbers generated by the random number generation module; The first power supply control module is configured to control the indoor unit corresponding to the random number to control the wire if the wire controller is in a non-power-receiving state when the random number timing module completes the countdown of any random number. power supply; The random number generation module is further configured to generate a random number N according to the method shown in the following formula: N=a×T _mr +b×AD Wherein, the T _mr is a preset timer count value, the AD is the output value of the AD conversion module corresponding to any temperature sensor in the indoor unit, the a and b are both preset coefficients, and a≠≠ b. 6. The device according to claim 5, wherein the device further comprises a second power supply control module and/or a third power supply control module; The second power supply control module is configured such that the random number timing module interrupts the random number countdown if the wire controller is in a power receiving state before any random number countdown is completed; The third power supply control module is configured to determine whether to interrupt the power supply according to the power receiving state of the wired controller after the indoor unit supplies power to the wired controller: If it is detected that the wired controller is in a non-power-receiving state, the power supply of the indoor unit to the wired controller is interrupted; If it is detected that the wired controller is in a power receiving state, it is determined whether the indoor unit is electrically connected to the wired controller, and if not, the power supply from the indoor unit to the wired controller is interrupted. 7. The device according to claim 6, wherein the third power supply control module comprises a first electrical connection determination unit and/or a second electrical connection determination unit; The first electrical connection determination unit is configured to perform the following operations: Control the indoor unit to send a detection signal to the wire controller, and collect the detection signal received by the wire controller; Judging whether the detection signals sent and collected by the indoor unit are consistent, if they are consistent, it is determined that the indoor unit is electrically connected to the wired controller, and if they are inconsistent, it is determined that the indoor unit is not electrically connected to the wired controller; The second electrical connection judging unit is configured to perform the following operations: If the indoor unit receives the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit is electrically connected to the wired controller; If the indoor unit does not receive the confirmation connection signal fed back by the wired controller, it is determined that the indoor unit and the wired controller are not electrically connected. 8. An air conditioner, characterized in that it comprises the wire controller power supply control device of the multi-connected air conditioner system according to any one of claims 5-7.

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