The invention discloses a multi-connected air conditioner system. The v multi-connected air conditioner system comprises at least two indoor units and an outdoor unit, and the outdoor unit is connected with the at least two indoor units; the outdoor unit is connected with a control device through a route device, the outdoor unit receives user commands sent by the control device through the route device, the indoor units are selected according to the user commands, and a control instruction is sent to the selected indoor unit to control the selected indoor unit to operate. The invention further discloses a variable refrigerant flow control method, the outdoor unit and a storage medium. According to the multi-connected air conditioner system and control method, the outdoor unit and the storage medium, the outdoor unit is connected with a network and is connected with the route device, the outdoor unit is connected with the indoor units, the outdoor unit is uniformly connected with external devices, a communication module is not required to be arranged on each indoor unit, and therefore control of the indoor units and the outdoor unit of the variable refrigerant flow is guaranteed, and cost is saved.

Multi-connected air conditioner system and control method, outdoor unit and storage medium

The present disclosure provides an air conditioner current loop communication circuit and an air conditioner. The switching power supply module is connected in series to the communication connection S line or the AC power connection line to output the direct current to the current loop communication loop. The DC power output from the switching power supply module is configured to replace the existing resistance voltage divider type DC power supply circuit, and is compatible with the existing current loop communication circuit connecting wires between the indoor unit and outdoor unit of the air conditioner, which solves the problems that the existing current communication loop circuit of the air conditioner may generate serious heat due to the large power consumption during the operation of the voltage divider resistor, and the large volume of the voltage divider resistor is also not conducive to the PCB layout of the current loop communication circuit.

Air Conditioner Current Loop Communication Circuit And Air Conditioner

The invention provides a method and system for controlling an air-conditioner, computer equipment and a computer readable storage medium. The air-conditioner comprises an outdoor unit, a compressor and an electronic expansion valve. The control method includes the steps that after it is detected that the outdoor unit is powered up for the first time, the compressor is started; and meanwhile the electronic expansion valve is controlled to reset. According to the method for controlling the air-conditioner, starting of the compressor and resetting of the electronic expansion valve can be conducted at the same time, the phenomenon that when an air-conditioner in the prior art operates in a heating mode, the compressor can only be started after the electronic expansion valve is reset and thus the air-conditioner cannot output heat quickly is avoided, the fast heating effect of the air-conditioner is improved, and therefore the using experience of the air-conditioner by users is also improved.

Method and system for controlling air-conditioner, air-conditioner and computer equipment

The embodiment of the invention provides a method and device for controlling a line sequence, and relates to the field of air conditioners. The problems that under the condition that a communication connecting line between an indoor unit and an outdoor unit is connected wrongly, the consumed time is long and the operation safety degree is low due to the fact that the communication connecting lineis manually reconnected can be solved. Specifically, the device for controlling the line sequence firstly sends a first detection signal to the outdoor unit, and if the device for controlling the linesequence does not receive a response signal of the first detection signal within a first preset time period, the device for controlling the line sequence controls a first interface to be connected with a second power line and controls a second interface to be connected with a first power line. Therefore, the device for controlling the line sequence can automatically detect whether the communication connecting line between the indoor unit and the outdoor unit is correctly connected or not, and the communication connecting line is switched when the connection is preliminarily judged to be wrong, so that the time cost is saved, and the operation safety is improved.

Method and device for controlling line sequence

The embodiment of the invention provides an air conditioner control method and control device as well as an air conditioner, relates to the field of air conditioning equipment, and aims to reduce or eliminate the noise generated by zero reset control of an electronic expansion valve and the influence on the reliability of the air conditioner. The air conditioner control method is applied to the air conditioner, wherein the air conditioner comprises at least one electronic expansion valve arranged on a refrigerant pipeline; the method comprises the following steps of when it is determined thata compressor of the air conditioner is stopped or any electronic expansion valve opening degree is 0, generating a zero reset control instruction for a predetermined electronic expansion valve; and according to the zero reset control instruction, carrying out zero-point reset operation on the opening degree of the predetermined electronic expansion valve, wherein when the opening degree of any electronic expansion valve is 0, the predetermined electronic expansion valve comprises any electronic expansion valve, and when the compressor of the air conditioner is stopped, the predetermined electronic expansion valve comprises at least one electronic expansion valve on the refrigerant pipeline of the air conditioner. The method is used for electronic expansion valve control.

Air conditioner control method and control device as well as air conditioner

The invention provides a current loop communication device and an air conditioner. The air conditioner comprises an outdoor machine and at least one indoor machine. The current loop communication device comprises an indoor machine communication circuit and an outdoor machine communication circuit, wherein the indoor machine communication circuit is arranged in each of the at least indoor machine; the outdoor machine communication circuit is arranged in the outdoor machine; and the indoor machine communication circuit in each indoor machine is connected to a first alternating current power supply through a neutral wire and a live wire, the outdoor machine communication circuit is connected to a second alternating current power supply through a neutral wire and a live wire, the indoor machine communication circuit in each indoor machine is connected to the outdoor machine communication circuit through a signal communication loop, so as to realize the communication between each indoor machine and the outdoor machine. According to the technical scheme of the invention, the indoor machine and the outdoor machine can be electrified separately or through different phases, so that the requirements of the air conditioner on the capacity of power supply equipment are reduced, the wire diameter of single power supply wire can be reduced, the laying of power supply wires is benefited, and meanwhile, the relatively reliable communication between the indoor machine and the outdoor machine is guaranteed.

Current loop communication device and air conditioner

The invention discloses a starting method of an air-conditioner. The air-conditioner comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger and an electronic expansion valve. The starting method includes the steps that after a power-on signal is detected, a compressor is controlled to be started, and the electronic expansion valve is controlled to reset, wherein the refrigerant flow of the electronic expansion valve is larger than zero when the electronic expansion valve resets to the initial opening degree; after the electronic expansion valve resets to the initial opening degree, the electronic expansion valve is controlled to run to the needed opening degree according to the control mode and the exhaust temperature of the compressor, wherein the needed opening degree is larger than the initial opening degree. By means of the starting method of the air-conditioner, the delay waiting time can be saved, and the starting time is shortened. The invention further discloses the air-conditioner.

Air-conditioner and starting method thereof

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Current loop communication device and air conditioner

Air-conditioner and starting method thereof