CN111319645A

Movatterモバイル変換

Info

Publication number: CN111319645A
Application number: CN202010238474.5A
Authority: CN
Inventors: 赵博; 庞学博; 杨磊; 曾磊; 魏子淇; 程显耀
Original assignee: CRRC Dalian Institute Co Ltd
Current assignee: CRRC Dalian Institute Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-06-23

Abstract

The invention provides CO for a locomotive₂Refrigerant air conditioner control system includes: the air conditioner comprises a control box body, a first control module, an air conditioner execution module and a temperature acquisition module, wherein the first control module, the air conditioner execution module and the temperature acquisition module are arranged in the control box body; the output end of the temperature acquisition module is connected with the input end of the first control module, and the output end of the first control module is connected with the input end of the air conditioner execution module; the temperature acquisition module acquires a temperature signal in the locomotive and sends the temperature signal to the first control module; the first control module receives the temperature signal sent by the temperature acquisition module, processes the temperature signal, sends an instruction to the air conditioner execution module, and controls the air conditioner execution module to act to adjust the temperature. The invention integrates the control module, the air conditioner execution module and the temperature acquisition module into the control box, integrates the dispersed equipment together, and realizes CO₂The space of the refrigerant air conditioning system is reduced, and the space utilization rate of a control system of the air conditioning unit is improved.

Description

Translated fromChinese

一种机车用CO2冷媒空调控制系统A CO2 refrigerant air conditioning control system for locomotives

技术领域technical field

本发明涉及机车空调控制领域，尤其涉及一种机车用CO₂冷媒空调控制系统。The invention relates to the field of locomotive air-conditioning control, in particular to a CO₂ refrigerant air-conditioning control system for locomotives.

背景技术Background technique

随着我国轨道交通行业的快速发展，司机和乘客对车内的温度舒适性和安全性要求越来越高；传统冷媒空调已经越来越难满足国际上对绿色环保等级的最新要求，环保制冷剂CO₂冷媒空调将成为未来推广使用的主要产品。With the rapid development of China's rail transit industry, drivers and passengers have higher and higher requirements for temperature comfort and safety in the car; traditional refrigerant air conditioners have become more and more difficult to meet the latest international requirements for green environmental protection grades, environmental protection refrigeration The_CO2 refrigerant air conditioner will become the main product to be promoted and used in the future.

机车用空调机组一般尺寸都较为紧凑，现有技术中大部分车型要求将空调控制装置集成在空调机组内，直接导致空调机组中的控制系统的安装结构和空间变小。但CO₂冷媒空调系统比传统冷媒系统要复杂，结构更加繁多；导致控制系统空间不足，控制系统内部设备无法安装，因此如何将分散在空调机组内的制冷设备集成并达到控制系统的空间扩大，是实现产业化过程中必须解决的关键技术。Air conditioning units for locomotives are generally compact in size, and most vehicle models in the prior art require an air conditioning control device to be integrated into the air conditioning unit, which directly results in a smaller installation structure and space for the control system in the air conditioning unit. However, the CO₂ refrigerant air-conditioning system is more complicated and has more structures than the traditional refrigerant system, resulting in insufficient space for the control system and the inability to install the internal equipment of the control system. Therefore, how to integrate the refrigeration equipment scattered in the air-conditioning unit and expand the space of the control system, It is a key technology that must be solved in the process of industrialization.

发明内容SUMMARY OF THE INVENTION

本发明提供一种机车用CO₂冷媒空调控制系统，以克服上述技术问题。The present invention provides a CO₂ refrigerant air conditioning control system for locomotives to overcome the above technical problems.

本发明提供一种机车用CO₂冷媒空调控制系统，包括：控制盒本体、设置在控制盒本体内的第一控制模块、空调执行模块和温度采集模块；所述温度采集模块的输出端与所述第一控制模块的输入端相连，所述第一控制模块的输出端与所述空调执行模块的输入端相连；The invention provides a CO₂ refrigerant air conditioning control system for locomotives, comprising: a control box body, a first control module arranged in the control box body, an air conditioning execution module and a temperature acquisition module; the output end of the temperature acquisition module is connected to the The input end of the first control module is connected, and the output end of the first control module is connected with the input end of the air-conditioning execution module;

所述温度采集模块采集机车内温度信号并向所述第一控制模块发送的温度信号；The temperature acquisition module collects the temperature signal in the locomotive and sends the temperature signal to the first control module;

所述第一控制模块接收所述温度采集模块发送的温度信号，并对所述温度信号进行处理，并向所述至所述空调执行模块发送指令，控制所述空调执行模块动作进行温度调节。The first control module receives the temperature signal sent by the temperature acquisition module, processes the temperature signal, and sends an instruction to the air conditioner execution module to control the action of the air conditioner execution module to adjust the temperature.

进一步地，所述控制盒本体设置于空调机组的回风口上部。Further, the control box body is arranged on the upper part of the air return port of the air-conditioning unit.

进一步地，所述空调执行模块包括：通风机、冷凝风机、压缩机和加热器；所述第一控制模块分别控制所述通风机、冷凝风机、压缩机和加热器动作。Further, the air conditioning execution module includes: a ventilator, a condensing fan, a compressor and a heater; the first control module controls the actions of the ventilator, the condensing fan, the compressor and the heater respectively.

进一步地，所述温度采集模块包括采集车内外温度的新风温度传感器和采集车内回风温度的回风温度传感器。Further, the temperature collection module includes a fresh air temperature sensor that collects the temperature inside and outside the vehicle and a return air temperature sensor that collects the temperature of the return air inside the vehicle.

进一步地，还包括设置在所述控制盒本体内的第二控制模块，所述第二控制模块与所述第一控制模块通讯连接；Further, it also includes a second control module disposed in the control box body, and the second control module is communicatively connected with the first control module;

所述第二控制模块包括：电子膨胀阀控制器、冷媒压力传感器和冷媒温度传感器，所述电子膨胀阀控制器接收冷媒压力传感器和冷媒温度传感器分别发送的冷凝管路内的CO₂冷媒压力和CO₂冷媒温度，并调节电子膨胀阀的开度。The second control module includes: an electronic expansion valve controller, a refrigerant pressure sensor and a refrigerant temperature sensor. The electronic expansion valve controller receives the_CO2 refrigerant pressure and the refrigerant pressure in the condensing pipeline sent by the refrigerant pressure sensor and the refrigerant temperature sensor respectively._CO2 refrigerant temperature, and adjust the opening of the electronic expansion valve.

进一步地，所述空调执行模块还包括：变频器；所述变频器接收所述第一控制模块发送的指令，并控制所述压缩机动作。Further, the air-conditioning execution module further includes: a frequency converter; the frequency converter receives an instruction sent by the first control module, and controls the operation of the compressor.

本发明通过将控制模块、空调执行模块和温度采集模块集成在控制盒内，将分散的设备集成到一起，实现了CO₂冷媒空调系统空间的缩小，提高了空调机组的控制系统的空间利用率。By integrating the control module, the air-conditioning execution module and the temperature acquisition module in the control box, the invention integrates the scattered equipment together, thereby realizing the reduction of the space of the CO₂ refrigerant air-conditioning system and improving the space utilization rate of the control system of the air-conditioning unit. .

附图说明Description of drawings

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

图1为本发明机车用CO₂冷媒空调控制系统的控制流程示意图；Fig. 1 is the control flow schematic diagram of CO₂ refrigerant air conditioning control system for locomotive of the present invention;

图2为本发明机车用CO₂冷媒空调控制系统电气原理图。Figure 2 is an electrical schematic diagram of the_CO2 refrigerant air conditioning control system for locomotives of the present invention.

具体实施方式Detailed ways

为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

本发明提供一种机车用CO₂冷媒空调控制系统，所述机车用CO₂冷媒空调控制系统为空调控制盒，空调控制盒具备防水功能，并设置在空调机组的回风口上部，利用风的流动带走热量，便于散热，而且结构紧凑，无需在室内分体安装，为机车节省空间。所述控制盒包括：第一控制模块1、空调执行模块2和温度采集模块；所述第一控制模块1为西门子SMART系列CPU ST30 DC/DCDC，包含18路数字量输入通道和12路数字量输出通道，尺寸长宽高为110×100×181，在占用最小的控制盒空间的情况下，满足空调对控制输入输出点数的需求，同时满足轨道交通车辆电子设备的电子兼容要求；如图1所示，所述温度采集模块包括新风温度传感器11.1和回风温度传感器11.2；所述新风温度传感器11.1和回风温度传感器11.2的输出端与所述第一控制模块1的输入端相连，所述第一控制模块1的输出端与所述空调执行模块2的输入端相连；The invention provides a CO₂ refrigerant air conditioning control system for locomotives. The CO₂ refrigerant air conditioning control system for locomotives is an air conditioning control box. The air conditioning control box has a waterproof function and is arranged on the upper part of the air return port of the air conditioning unit to utilize the flow of wind. It takes away heat, facilitates heat dissipation, and has a compact structure, which does not need to be installed indoors separately, saving space for the locomotive. The control box includes: a first control module 1, an airconditioner execution module 2 and a temperature acquisition module; the first control module 1 is a Siemens SMART series CPU ST30 DC/DCDC, including 18 digital input channels and 12 digital input channels. The output channel has a size of 110×100×181 in length, width and height. It can meet the requirements of the air conditioner for the number of control input and output points while occupying the minimum space of the control box, and at the same time meet the electronic compatibility requirements of the electronic equipment of rail transit vehicles; Figure 1 As shown, the temperature acquisition module includes a fresh air temperature sensor 11.1 and a return air temperature sensor 11.2; the output ends of the fresh air temperature sensor 11.1 and the return air temperature sensor 11.2 are connected to the input end of the first control module 1, and the The output end of the first control module 1 is connected with the input end of the airconditioning execution module 2;

所述第一控制模块1接收所述新风温度传感器11.1和回风温度传感器11.2发送的温度信号，并对所述温度信号进行处理(此处的处理过程为现有技术，本申请不再赘述)，并向所述至所述空调执行模块2发送指令，控制所述空调执行模块2动作进行温度调节。The first control module 1 receives the temperature signals sent by the fresh air temperature sensor 11.1 and the return air temperature sensor 11.2, and processes the temperature signals (the processing process here is the prior art, which will not be repeated in this application) , and send an instruction to the airconditioning execution module 2 to control the action of the airconditioning execution module 2 to adjust the temperature.

进一步地，还包括设置在所述控制盒本体内的第二控制模块7，所述第二控制模块7与所述第一控制模块1通过RS485Modbus协议进行通讯，并进行数据的交互；Further, it also includes a second control module 7 arranged in the control box body, the second control module 7 communicates with the first control module 1 through the RS485Modbus protocol, and performs data interaction;

所述第二控制模块7包括电子膨胀阀控制器8、采集冷凝器管路出口压力的冷媒压力传感器9和采集冷凝器管路出口温度的冷媒温度传感器10，所述电子膨胀阀控制器8接收冷媒压力传感器9和冷媒温度传感器10分别发送的冷凝管路内的CO₂冷媒压力和CO₂冷媒温度。The second control module 7 includes an electronic expansion valve controller 8, a refrigerant pressure sensor 9 that collects the outlet pressure of the condenser pipeline, and arefrigerant temperature sensor 10 that collects the outlet temperature of the condenser pipeline. The electronic expansion valve controller 8 receives The refrigerant pressure sensor 9 and therefrigerant temperature sensor 10 send the CO₂ refrigerant pressure and CO₂ refrigerant temperature in the condensing line, respectively.

新风温度传感器11.1和回风温度传感器11.2分别采集车内外温度和回风温度并将温度信息传输给第一控制模块，车内目标温度根据UIC553温度曲线计算，根据目标温度与回风温度的温差大小控制空调机组工作模式，当目标温度高于回风温度2℃时，CO₂冷媒空调进入制冷模式，此时第一控制模1块控制冷凝风机4运行；当目标温度低于回风温度2℃时，CO₂冷媒空调进入制热模式，第一控制模块1控制电加热器6运行；当目标温度与回风温度在±2℃内时，CO₂冷媒空调保持通风模式，第一控制模块1控制通风机3运行；第一控制模块1在实际应用中，采用24V直流电作为供电电源，电源开启后，控制系统正常运行。The fresh air temperature sensor 11.1 and the return air temperature sensor 11.2 collect the temperature inside and outside the vehicle and the temperature of the return air respectively and transmit the temperature information to the first control module. The target temperature inside the vehicle is calculated according to the UIC553 temperature curve, according to the temperature difference between the target temperature and the return air temperature. Control the working mode of the air-conditioning unit. When the target temperature is 2°C higher than the return air temperature, the_CO2 refrigerant air conditioner enters the cooling mode. At this time, the first control module 1 controls the operation of the condensing fan 4; when the target temperature is lower than the return air temperature by 2°C When the_CO2 refrigerant air conditioner enters the heating mode, the first control module 1 controls the operation of the electric heater 6; when the target temperature and the return air temperature are within ±2°C, the_CO2 refrigerant air conditioner maintains the ventilation mode, and the first control module 1 Control the operation of the ventilator 3; in the actual application of the first control module 1, 24V direct current is used as the power supply, and the control system operates normally after the power is turned on.

所述温度采集模块11采集的车内温度高于第一控制模块1内设定的目标温度2℃时，电子膨胀阀控制器7.8接收冷媒压力传感器9和冷媒温度传感器10分别采集的冷凝器管路出口的CO₂冷媒压力和温度，当运行在制冷模式时，通过公式P＝K×T+B，其中P为电子膨胀阀控制器7.8内CO₂冷凝器管路出口压力设定值，K为系数，T为冷凝器管路出口温度，B为常数，(公式的推导过程是：将空调放入性能实验室，根据空调技术要求设定好风量，然后调节室外的环境温度，在不同的环境温度下如28℃,30℃,32℃,35℃，尽量多的温度点，在各个温度下，调节压缩机的频率和电子膨胀阀的开度，使空调达到额定制冷量的数值如6kW制冷量，记录此时的冷凝器出口温度和冷凝器出口压力，根据这些组的数据，形成尽量多的点在的一条线性曲线，从而得出曲线的系数K和系数B，然后将此系数编写到对电子膨胀阀的调节程序中。)根据系统匹配需求，在第一控制模块内的程序中设定系数K和系数B的数值，运用设定值与采集的冷凝器出口的压力比较并结合PID控制进行电子膨胀阀的调节，当冷媒压力传感器9采集的管路压力比电子膨胀阀控制器内预设压力值大时，电子膨胀阀控制器控制电子膨胀阀全开，压力减小时电子膨胀阀控制器控制电子膨胀阀关小开度，从而实现制冷模式冷量输出调节(本部分的调节方式为现有技术，本申请不再赘述)。电子膨胀阀采用每秒50步数的步进电机，以满足空调对开度的要求，电子膨胀阀控制器与第一控制模块采用RS485 Modbus协议进行通讯实现数据交互。When the in-vehicle temperature collected by thetemperature collection module 11 is 2°C higher than the target temperature set in the first control module 1, the electronic expansion valve controller 7.8 receives the condenser tubes collected by the refrigerant pressure sensor 9 and therefrigerant temperature sensor 10 respectively. The_CO2 refrigerant pressure and temperature at the outlet of the circuit, when operating in the cooling mode, through the formula P=K×T+B, where P is the set value of the_CO2 condenser pipe outlet pressure in the electronic expansion valve controller 7.8, K is the coefficient, T is the outlet temperature of the condenser pipeline, and B is a constant. (The derivation process of the formula is: put the air conditioner into the performance laboratory, set the air volume according to the technical requirements of the air conditioner, and then adjust the outdoor ambient temperature. Under the ambient temperature such as 28℃, 30℃, 32℃, 35℃, as many temperature points as possible, at each temperature, adjust the frequency of the compressor and the opening of the electronic expansion valve to make the air conditioner reach the rated cooling capacity value such as 6kW Refrigeration capacity, record the condenser outlet temperature and condenser outlet pressure at this time, according to the data of these groups, form a linear curve with as many points as possible, so as to obtain the coefficient K and coefficient B of the curve, and then write this coefficient into the adjustment program of the electronic expansion valve.) According to the matching requirements of the system, set the values of the coefficient K and the coefficient B in the program in the first control module, and use the set value to compare and combine the collected pressure at the condenser outlet. PID control is used to adjust the electronic expansion valve. When the pipeline pressure collected by the refrigerant pressure sensor 9 is greater than the preset pressure value in the electronic expansion valve controller, the electronic expansion valve controller controls the electronic expansion valve to fully open, and the electronic expansion valve expands when the pressure decreases. The valve controller controls the electronic expansion valve to close the opening to a small degree, so as to realize the adjustment of the cooling capacity output in the refrigeration mode (the adjustment method in this part is the prior art, which will not be repeated in this application). The electronic expansion valve adopts a stepping motor with 50 steps per second to meet the requirements of the air conditioner on the opening degree. The electronic expansion valve controller and the first control module use the RS485 Modbus protocol for communication to realize data exchange.

进一步地，如图2所示，所述空调执行模块2还包括：变频器13；所述变频器13接收所述第一控制模块1发送的指令，并控制所述通风机3、冷凝风机4、压缩机5和加热器6动作。Further, as shown in FIG. 2 , the airconditioning execution module 2 further includes: afrequency converter 13 ; thefrequency converter 13 receives the instructions sent by the first control module 1 and controls the fan 3 and the condensing fan 4 , thecompressor 5 and the heater 6 operate.

当运行制热模式时，第一控制模块1控制通风机3和电加热器6的运行，保证制热模式的正常运行。当车内温度与第一控制模块1内设定的目标温度接近时，第一控制模块1只控制通风机的运行，保证通风模式的正常运行。When running the heating mode, the first control module 1 controls the operation of the ventilator 3 and the electric heater 6 to ensure the normal operation of the heating mode. When the temperature inside the vehicle is close to the target temperature set in the first control module 1, the first control module 1 only controls the operation of the ventilator to ensure the normal operation of the ventilation mode.

在通风模式下，仅通风机持续工作，其他设备不动作；In ventilation mode, only the ventilator works continuously, and other equipment does not work;

在制冷模式下，先开启通风机，延时5秒，开启冷凝风机，延时10秒，开启压缩机并根据温差的要求变频器13输出相应的频率控制压缩机运行；In cooling mode, turn on the fan first, delay 5 seconds, turn on the condensing fan, delay 10 seconds, turn on the compressor, and control the compressor operation by outputting the corresponding frequency of theinverter 13 according to the requirements of the temperature difference;

在制热模式下，先开启通风机，延时10秒，开启电加热；In the heating mode, turn on the fan first, delay 10 seconds, and turn on the electric heating;

三种模式中，部件的动作先后有严格要求，前一级设备如果故障未动作则后级设备不能启动，具有严格的逻辑要求，从而避免对系统带来危险。In the three modes, there are strict requirements for the actions of the components. If the previous level equipment fails to act, the latter level equipment cannot be started, which has strict logic requirements, so as to avoid danger to the system.

第一控制模块1根据电子膨胀阀控制器8采集的冷凝器管路出口压力值并对系统进行压力保护，当压力值接近设定报警压力时，第一控制模块1控制所述变频器13降低所述压缩机5运行频率，避免出现高压压力报警；变频器13采用多段速给定控制方式，会工作在60Hz、70Hz、80Hz、90Hz等不同的频率下以实现不同制冷量的输出，克服温度调节时温度波动较大的确定，使温度控制更加平稳，温度控制精度在±0.5℃以内，起到节能减排的效果。The first control module 1 performs pressure protection on the system according to the condenser pipeline outlet pressure value collected by the electronic expansion valve controller 8. When the pressure value is close to the set alarm pressure, the first control module 1 controls thefrequency converter 13 to reduce Thecompressor 5 operates at a frequency to avoid high pressure and pressure alarms; thefrequency converter 13 adopts a multi-stage speed given control mode, and will work at different frequencies such as 60Hz, 70Hz, 80Hz, 90Hz, etc. to achieve the output of different cooling capacities and overcome the temperature The temperature fluctuation during adjustment is determined to make the temperature control more stable, and the temperature control accuracy is within ±0.5 °C, which has the effect of energy saving and emission reduction.

进一步地，还包括触摸屏，所述触摸屏设置在司机室，与所述第一控制模块1通过以太网通讯方式连接，触摸屏可以取代空调操作面板，将命令输入按钮组态到触摸屏内，同时H触摸屏还能集成报警和故障记录等功能，功能集成更加完备，为售后服务提供便利。以便驾驶人员进行数据查询和控制；所述触摸屏可以显示当前车内实时温度、目标设定温度、工作模式和故障记录等信息，实现了空调运行的可视化。Further, it also includes a touch screen, which is arranged in the driver's cab and is connected to the first control module 1 through Ethernet communication. The touch screen can replace the air conditioner operation panel, and the command input button is configured into the touch screen. It can also integrate functions such as alarm and fault recording, and the function integration is more complete, which provides convenience for after-sales service. In order to facilitate the driver to conduct data query and control; the touch screen can display information such as the current real-time temperature in the car, the target set temperature, the working mode and the fault record, which realizes the visualization of the operation of the air conditioner.

最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims

1. CO for locomotive₂Refrigerant air conditioner control system, its characterized in that includes: the air conditioner comprises a control box body, a first control module (1), an air conditioner execution module (2) and a temperature acquisition module (11), wherein the first control module, the air conditioner execution module and the temperature acquisition module are arranged in the control box body; the output end of the temperature acquisition module (11) is connected with the input end of the first control module (1), and the output end of the first control module (1) is connected with the input end of the air conditioner execution module (2);

the temperature acquisition module (11) acquires an in-locomotive temperature signal and sends the in-locomotive temperature signal to the first control module (1);

the first control module (1) receives the temperature signal sent by the temperature acquisition module (11), processes the temperature signal, sends an instruction to the air conditioner execution module (2), and controls the air conditioner execution module (2) to act to adjust the temperature.

2. The system of claim 1, wherein the control box body is disposed at an upper portion of a return air inlet of the air conditioning unit.

3. The system according to claim 1, characterized in that the air-conditioning execution module (2) comprises: the device comprises a ventilator (3), a condensing fan (4), a compressor (5) and a heater (6); the first control module (1) respectively controls the ventilator (3), the condensing fan (4), the compressor (5) and the heater (6) to act.

4. The system according to claim 1, characterized in that the temperature acquisition module (11) comprises a fresh air temperature sensor (11.1) for acquiring the temperature inside and outside the vehicle and a return air temperature sensor (11.2) for acquiring the temperature of the return air inside the vehicle.

5. The system of claim 3, further comprising a second control module (7) disposed within the control box body, the second control module (7) communicatively coupled with the first control module (1);

the second control module (7) comprises: the electronic expansion valve controller (7.8), the refrigerant pressure sensor (7.9) and the refrigerant temperature sensor (7.10), wherein the electronic expansion valve controller (8) receives CO in a condensation pipeline sent by the refrigerant pressure sensor (9) and the refrigerant temperature sensor (10) respectively₂Refrigerant pressure and CO₂The temperature of the refrigerant and the opening degree of the electronic expansion valve are adjusted.

6. The system according to claim 5, characterized in that the air-conditioning execution module (2) further comprises: a frequency converter (13); and the frequency converter (13) receives the instruction sent by the first control module (1) and controls the compressor (5) to act.