WO2020103407A1 - Multi-split air conditioning system and start control method therefor - Google Patents

Multi-split air conditioning system and start control method therefor

Info

Publication number
WO2020103407A1
WO2020103407A1 PCT/CN2019/087030 CN2019087030W WO2020103407A1 WO 2020103407 A1 WO2020103407 A1 WO 2020103407A1 CN 2019087030 W CN2019087030 W CN 2019087030W WO 2020103407 A1 WO2020103407 A1 WO 2020103407A1
Authority
WO
WIPO (PCT)
Prior art keywords
expansion valve
conditioning system
exhaust gas
value
exhaust
Prior art date
Application number
PCT/CN2019/087030
Other languages
French (fr)
Chinese (zh)
Inventor
禚百田
时斌
程绍江
张锐钢
王军
Original Assignee
青岛海尔空调电子有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛海尔空调电子有限公司 filed Critical 青岛海尔空调电子有限公司
Publication of WO2020103407A1 publication Critical patent/WO2020103407A1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data

Definitions

  • the invention relates to the technical field of air conditioning, and in particular to a multi-line air conditioning system and its startup control method.
  • the external unit is connected to multiple internal units.
  • refrigerant In order to ensure the normal operation of the system, it is necessary to add refrigerant on site according to the pipeline length and pipe diameter of the internal and external machines. However, at the same time, it will cause excessive liquid refrigerant damage to the compressor during the initial operation of the system.
  • the invention patent document with the publication number CN107642873A discloses an electronic expansion valve opening control method when the air conditioner is started, first according to the shutdown time before the compressor is started and the outdoor ambient temperature Determine whether this start-up is a cold start state, a hot start state or an intermediate start state, and determine the retention time of the initial opening degree of the electronic expansion valve according to the startup state; then calculate the electronic expansion valve's operating frequency based on the compressor operating frequency, indoor ambient temperature and outdoor ambient temperature Initial opening; when the electronic expansion valve maintains the initial opening for the retention time, it enters normal electronic expansion valve control.
  • the opening degree of the electronic expansion valve is limited to a certain opening degree at the time of startup, and these expansion valves are put into automatic control after the system operates normally.
  • the opening of the internal and external engine expansion valves is too small during startup, it will affect the air-conditioning effect and even cause the system to have low pressure and other faults. If the opening is too large, the compressor liquid blow cannot be effectively avoided.
  • the present invention proposes a multi-connected air-conditioning system and its start-up control method, which can effectively guarantee the operating effect of the multi-connected air-conditioning system to the greatest extent, and ensure the stability and reliability of the system, while effectively preventing liquid shock Run.
  • a startup control method for a multi-connected air conditioning system is proposed.
  • the startup control method includes:
  • the opening degree of the expansion valve in the multi-line air conditioning system is adjusted according to the operating parameters.
  • the step of "adjusting the opening degree of the expansion valve in the multi-line air conditioning system according to the operating parameters" includes:
  • the opening degree of the expansion valve on the external unit side or the internal unit side of the multi-line air conditioning system is adjusted.
  • the operating parameters include: the exhaust temperature value and high pressure of the compressor; the step of "calculating the target opening value of the expansion valve according to the operating mode and the operating parameters" includes:
  • the target opening value of the expansion valve is obtained according to the operation mode, the exhaust gas temperature value, and the exhaust gas superheat degree.
  • the step of “acquiring the exhaust gas superheat of the compressor according to the exhaust gas temperature value and the high-pressure pressure” includes:
  • TdSH Td-Pd_temp
  • TdSH is the exhaust gas superheat
  • Td is the exhaust gas temperature value
  • Pd_temp is the saturation temperature value of the refrigerant.
  • the step of “acquiring the target opening value of the expansion valve according to the operation mode, the exhaust temperature value and the exhaust superheat degree” includes:
  • the expansion valve threshold including a preset minimum expansion valve opening MinMin and a predetermined maximum expansion valve opening MaxPos;
  • the target opening value of the expansion valve is LEVpos.
  • the step of “calculating the initial target opening value LEVpos of the expansion valve according to the operation mode, the exhaust gas temperature value and the exhaust gas superheat degree” includes:
  • the exhaust gas temperature value and the exhaust gas superheat degree and calculate the initial target opening value LEVpos of the expansion valve according to the following formula:
  • ⁇ Td i is the i-th acquired exhaust temperature value Td i i-1 and the first exhaust gas temperature value currently obtained difference Td between the i-1; i is arranged in the exhaust chronologically
  • TdSH is the exhaust superheat;
  • Th 1 is A preset threshold value of exhaust gas superheat; Th 2 is a preset threshold value of the difference between the exhaust gas temperature values.
  • the step of "adjusting the opening degree of the expansion valve on the external unit side or the internal unit side in the multi-line air conditioning system according to the operation mode and the target opening value of the expansion valve” includes:
  • the operation mode is the cooling mode, adjust the opening degree of the expansion valve on the engine side of each start-up to the target opening degree value of the expansion valve;
  • the expansion valve opening of the external unit side is adjusted to the expansion valve target opening value.
  • control method further includes:
  • the start control is stopped.
  • the external unit is provided with an exhaust temperature sensor and a high-pressure pressure sensor, and the step of “timely acquiring the operating parameters of the compressor in the multi-connected air conditioning system during the startup of the multi-connected air conditioning system” specifically includes:
  • the exhaust gas temperature sensor and the high-pressure pressure sensor are used to periodically obtain the exhaust gas temperature value and the high-pressure pressure, respectively.
  • a multi-line air conditioning system including: a control device;
  • the control device is configured to control the opening degree of the expansion valve using the above-mentioned start-up control method of the multi-line air conditioning system.
  • the present invention has at least the following beneficial effects:
  • the multi-line air-conditioning system and the startup control method proposed by the present invention regularly obtain the operating parameters during the startup of the compressor, and adjust the opening degree of the expansion valve accordingly.
  • the present invention effectively guarantees the operating effect of the multi-line air conditioning system to the greatest extent, and ensures the stable and reliable operation of the system while effectively preventing liquid blow.
  • FIG. 1 is a schematic diagram of main steps of an embodiment of the startup control method of the multi-connected air conditioning system of the present invention.
  • FIG. 1 is a schematic diagram of main steps of an embodiment of the startup control method of the multi-connected air conditioning system of the present invention.
  • the multi-line air conditioning system in this embodiment includes an external machine and a plurality of internal machines connected to the external machine. Both the external machine side and the internal machine side are provided with expansion valves for adjusting the flow rate of the refrigerant, and the compressor is provided in the external machine.
  • the startup control method of this embodiment includes steps S1-S3:
  • step S1 the operating parameters of the compressor are periodically acquired during the startup process of the multi-line air conditioning system.
  • the operating parameters here include: the compressor discharge temperature value and high pressure.
  • an exhaust temperature sensor and a high-pressure pressure sensor are provided in the external unit, and the exhaust temperature sensor and the high-pressure pressure sensor are used to obtain the exhaust temperature value and the high-pressure pressure at preset time intervals, respectively.
  • step S2 the opening degree of the expansion valve is adjusted according to the operating parameters.
  • This step may specifically include steps S21-S22:
  • step S21 the operation mode of the multi-connected air conditioning system is obtained, and the target opening value of the expansion valve is calculated according to the operation mode and the operation parameters.
  • This step may specifically include steps S211-S212:
  • Step S211 Obtain the exhaust gas superheat of the compressor according to the exhaust gas temperature value and the high-pressure pressure.
  • This step may specifically include steps S2111-S2112:
  • Step S2111 converting the high pressure to the saturation temperature value of the refrigerant
  • step S2112 the exhaust gas superheat is calculated according to formula (1):
  • TdSH Td-Pd_temp (1)
  • TdSH is the exhaust gas superheat
  • Td is the exhaust gas temperature value
  • Pd_temp is the saturation temperature value of the refrigerant.
  • step S212 the expansion valve target opening degree value is obtained according to the operation mode, the exhaust gas temperature value and the exhaust gas superheat degree.
  • This step may specifically include steps S2121-S2122:
  • step S2121 the initial target opening value LEVpos of the expansion valve is calculated according to the operation mode, the exhaust temperature value and the exhaust superheat degree, as shown in formula (2):
  • Step S2122 compare LEVpos with a preset expansion valve threshold (including a preset minimum expansion valve opening degree MinPos and a predetermined expansion valve opening maximum value MaxPos), and obtain an expansion valve target opening value LEVpos ′ according to the comparison result:
  • a preset expansion valve threshold including a preset minimum expansion valve opening degree MinPos and a predetermined expansion valve opening maximum value MaxPos
  • step S22 the opening degree of the expansion valve on the external or internal machine side is adjusted according to the operation mode and the target opening value of the expansion valve, specifically:
  • the opening degree of the expansion valve on the engine side of each start-up is adjusted to the target opening degree value of the expansion valve
  • the expansion valve opening degree on the external unit side is adjusted to the expansion valve target opening degree value.
  • Step S3 Determine whether the exhaust temperature is greater than or equal to the preset exhaust temperature threshold, or whether the exhaust superheat is greater than or equal to the preset exhaust superheat threshold, if the exhaust temperature is greater than or equal to the preset exhaust temperature threshold or exhaust If the gas superheat degree is greater than or equal to the preset exhaust gas superheat threshold value, the start control is stopped. After that, automatic control is resumed, and the expansion valves of the internal and external units control the opening degree according to their respective control logics.
  • the preset exhaust gas superheat threshold MinNormalSH is the minimum exhaust gas superheat when the system enters normal operation, usually 20 degrees.
  • the preset exhaust temperature threshold MinNormalTd is the minimum exhaust temperature when the system enters normal operation, usually 70 degrees. These two parameters are usually selected according to the compressor specifications.
  • the expansion valve target opening value LEVpos ′ 32pls.
  • a similar calculation method can be used at T1-T6 to obtain the target opening value LEVpos' of the expansion valve.
  • the present invention also provides an embodiment of a multi-connected air conditioning system.
  • the multi-connected air conditioning system of this embodiment includes: a control device.
  • the control device is configured to control the opening degree of the expansion valve in the multi-connected air-conditioning system using the above-mentioned multi-connected air-conditioning system startup control method.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The present invention relates to the technical field of air conditioning, and in particular, to a multi-split air conditioning system and a start control method therefor, aiming at solving the problems that in the prior art, when the air conditioning system is started, small opening degree of expansion valves of inner and outer units affects the effect of an air conditioner and even causes an excessively low pressure of the system, and large opening degree cannot effectively avoid liquid slugging of a compressor. The start control method for the multi-split air conditioning system in the present invention comprises the following steps: periodically obtaining operating parameters of the compressor in the starting process of the multi-split air conditioning system; obtaining an operating mode of the multi-split air conditioning system, and calculating target opening values of the expansion valves according to the operating mode and the operating parameters; and adjusting the opening degree of the expansion valve on the outer unit side or the inner unit side according to the operating mode and the target opening values of the expansion valves. Compared with the method in the prior art for maintaining the fixed opening degree of the expansion valves in the starting process, in the present invention, the operating effect of the multi-split air conditioning system is guaranteed to the maximum extent under the condition of effectively preventing liquid slugging, and stable and reliable operation of the system is ensured.

Description

多联机空调***及其启动控制方法Multi-line air conditioning system and its starting control method 技术领域Technical field
本发明涉及空调技术领域，具体涉及一种多联机空调***及其启动控制方法。The invention relates to the technical field of air conditioning, and in particular to a multi-line air conditioning system and its startup control method.
背景技术Background technique
在多联机空调***中，外机连接了多个内机。为保证***的正常运行，需要现场根据内外机的管路长度、管径等追加冷媒，但是，同时会造成***运转初期冷媒过多出现液击损坏压缩机。In the multi-connected air conditioning system, the external unit is connected to multiple internal units. In order to ensure the normal operation of the system, it is necessary to add refrigerant on site according to the pipeline length and pipe diameter of the internal and external machines. However, at the same time, it will cause excessive liquid refrigerant damage to the compressor during the initial operation of the system.
公开号为CN107642873A的发明专利文件(申请日：2017.10.31，公开日：2018.01.30)公开了一种空调启动时电子膨胀阀开度控制方法，先根据压缩机启动前停机时间和室外环境温度判断本次启动是冷启动状态、热启动状态还是中间启动状态，根据启动状态确定电子膨胀阀初始开度的保持时间；再根据压缩机运行频率、室内环境温度和室外环境温度计算电子膨胀阀的初始开度；当电子膨胀阀保持初始开度达到保持时间后，进入正常电子膨胀阀控制。The invention patent document with the publication number CN107642873A (application date: 2017.10.31, publication date: 2018.01.30) discloses an electronic expansion valve opening control method when the air conditioner is started, first according to the shutdown time before the compressor is started and the outdoor ambient temperature Determine whether this start-up is a cold start state, a hot start state or an intermediate start state, and determine the retention time of the initial opening degree of the electronic expansion valve according to the startup state; then calculate the electronic expansion valve's operating frequency based on the compressor operating frequency, indoor ambient temperature and outdoor ambient temperature Initial opening; when the electronic expansion valve maintains the initial opening for the retention time, it enters normal electronic expansion valve control.
上述现有技术中，在启动时限定电子膨胀阀的开度固定在某一开度，在***运转正常后再令这些膨胀阀进入自动控制。但是，如果启动时内外机膨胀阀的开度过小会影响空调效果甚至导致***出现低压过低等故障，开度过大则无法有效避免压缩机液击。In the above-mentioned prior art, the opening degree of the electronic expansion valve is limited to a certain opening degree at the time of startup, and these expansion valves are put into automatic control after the system operates normally. However, if the opening of the internal and external engine expansion valves is too small during startup, it will affect the air-conditioning effect and even cause the system to have low pressure and other faults. If the opening is too large, the compressor liquid blow cannot be effectively avoided.
有鉴于此，特提出本发明。In view of this, the present invention is specifically proposed.
发明内容Summary of the invention
为了解决现有技术中的上述问题，本发明提出了一种多联机空调***及其启动控制方法，在有效防止液击的情况下，最大限度保证多联机空调***的运行效果，保证***稳定可靠运转。In order to solve the above problems in the prior art, the present invention proposes a multi-connected air-conditioning system and its start-up control method, which can effectively guarantee the operating effect of the multi-connected air-conditioning system to the greatest extent, and ensure the stability and reliability of the system, while effectively preventing liquid shock Run.
本发明的一方面，提出一种多联机空调***的启动控制方法，所述启动控制方法包括：In one aspect of the present invention, a startup control method for a multi-connected air conditioning system is proposed. The startup control method includes:
在所述多联机空调***启动过程中定时获取所述多联机空调***中压缩机的运转参数；During the start-up process of the multi-connected air conditioning system, regularly obtain the operating parameters of the compressor in the multi-connected air conditioning system;
根据所述运转参数调整所述多联机空调***中膨胀阀的开度。The opening degree of the expansion valve in the multi-line air conditioning system is adjusted according to the operating parameters.
优选地，“根据所述运转参数调整所述多联机空调***中膨胀阀的开度”的步骤包括：Preferably, the step of "adjusting the opening degree of the expansion valve in the multi-line air conditioning system according to the operating parameters" includes:
获取所述多联机空调***的运转模式，并根据所述运转模式与所述运转参数计算膨胀阀目标开度值；Obtain the operation mode of the multi-line air conditioning system, and calculate the expansion valve target opening value according to the operation mode and the operation parameters;
根据所述运转模式与所述膨胀阀目标开度值调整所述多联机空调***中外机侧或内机侧膨胀阀的开度。According to the operation mode and the target opening value of the expansion valve, the opening degree of the expansion valve on the external unit side or the internal unit side of the multi-line air conditioning system is adjusted.
优选地，所述运转参数包括：所述压缩机的排气温度值与高压压力；“根据所述运转模式与所述运转参数计算膨胀阀目标开度值”的步骤包括：Preferably, the operating parameters include: the exhaust temperature value and high pressure of the compressor; the step of "calculating the target opening value of the expansion valve according to the operating mode and the operating parameters" includes:
根据所述排气温度值与所述高压压力获取所述压缩机的排气过热度；Obtaining the exhaust gas superheat of the compressor according to the exhaust gas temperature value and the high-pressure pressure;
根据所述运转模式、所述排气温度值与所述排气过热度，获取所述膨胀阀目标开度值。The target opening value of the expansion valve is obtained according to the operation mode, the exhaust gas temperature value, and the exhaust gas superheat degree.
优选地，“根据所述排气温度值与所述高压压力获取所述压缩机的排气过热度”的步骤包括：Preferably, the step of “acquiring the exhaust gas superheat of the compressor according to the exhaust gas temperature value and the high-pressure pressure” includes:
将所述高压压力转换为冷媒的饱和温度值；Converting the high-pressure pressure to the saturation temperature value of the refrigerant;
根据下式计算所述排气过热度：Calculate the exhaust superheat according to the following formula:
TdSH＝Td-Pd_tempTdSH = Td-Pd_temp
其中，TdSH为所述排气过热度，Td为所述排气温度值；Pd_temp为所述冷媒的饱和温度值。Where, TdSH is the exhaust gas superheat, Td is the exhaust gas temperature value; Pd_temp is the saturation temperature value of the refrigerant.
优选地，“根据所述运转模式、所述排气温度值与所述排气过热度，获取所述膨胀阀目标开度值”的步骤包括：Preferably, the step of “acquiring the target opening value of the expansion valve according to the operation mode, the exhaust temperature value and the exhaust superheat degree” includes:
根据所述运转模式、所述排气温度值与所述排气过热度计算膨胀阀初始目标开度值LEVpos；Calculating the initial target opening value LEVpos of the expansion valve according to the operating mode, the exhaust temperature value and the exhaust superheat degree;
比较所述LEVpos与预设的膨胀阀阈值，所述膨胀阀阈值包括预设的膨胀阀开度最小值MinPos和预设的膨胀阀开度最大值MaxPos；Comparing the LEVpos with a preset expansion valve threshold, the expansion valve threshold including a preset minimum expansion valve opening MinMin and a predetermined maximum expansion valve opening MaxPos;
根据比较结果获取所述膨胀阀目标开度值：若LEVpos<MinPos，则所述膨胀阀目标开度值为MinPos；若LEVpos>MaxPos，则所述膨胀阀目标开度值为MaxPos；若MinPos≤LEVpos≤MaxPos，则所述膨胀阀目标开度值为LEVpos。Obtain the target opening value of the expansion valve according to the comparison result: if LEVpos <MinPos, the target opening value of the expansion valve is MinPos; if LEVpos> MaxPos, the target opening value of the expansion valve is MaxPos; if MinPos≤ LEVpos≤MaxPos, then the target opening value of the expansion valve is LEVpos.
优选地，“根据所述运转模式、所述排气温度值与所述排气过热度计算膨胀阀初始目标开度值LEVpos”的步骤包括：Preferably, the step of “calculating the initial target opening value LEVpos of the expansion valve according to the operation mode, the exhaust gas temperature value and the exhaust gas superheat degree” includes:
根据所述运转模式、所述排气温度值与所述排气过热度并且按照下式计算所述膨胀阀初始目标开度值LEVpos：According to the operation mode, the exhaust gas temperature value and the exhaust gas superheat degree and calculate the initial target opening value LEVpos of the expansion valve according to the following formula:
Figure PCTCN2019087030-appb-000001
Figure PCTCN2019087030-appb-000001
其中，△Td i为第i次获取的排气温度值Td i与第i-1次获取的排气温度值Td i-1之间的差值；i为按时间顺序排列的所述排气温度值的序号，i＝1,2,...,N，N为当前已获取的所述排气温度值的总次数；W 1和W 2均为预设的权重且W 1+W 2＝1，Rate 1和Rate 2均为预设的换算系数，并且所述W 1、W 2、Rate 1和Rate 2均取决于所述运转模式；TdSH为所述排气过热度；Th 1为预设的排气过热度的阈值；Th 2为预设的所述排气温度值的差值的阈值。 Wherein, △ Td i is the i-th acquired exhaust temperature value Td i i-1 and the first exhaust gas temperature value currently obtained difference Td between the i-1; i is arranged in the exhaust chronologically The serial number of the temperature value, i = 1, 2, ..., N, N is the total number of the exhaust gas temperature values currently obtained; W 1 and W 2 are both preset weights and W 1 + W 2 = 1, Rate 1 and Rate 2 are preset conversion factors, and the W 1 , W 2 , Rate 1 and Rate 2 all depend on the operating mode; TdSH is the exhaust superheat; Th 1 is A preset threshold value of exhaust gas superheat; Th 2 is a preset threshold value of the difference between the exhaust gas temperature values.
优选地，“根据所述运转模式与所述膨胀阀目标开度值调整所述多联机空调***中外机侧或内机侧膨胀阀的开度”的步骤包括：Preferably, the step of "adjusting the opening degree of the expansion valve on the external unit side or the internal unit side in the multi-line air conditioning system according to the operation mode and the target opening value of the expansion valve" includes:
当所述运转模式是制冷模式时，将每个开机内机侧的膨胀阀开度调整为所述膨胀阀目标开度值；When the operation mode is the cooling mode, adjust the opening degree of the expansion valve on the engine side of each start-up to the target opening degree value of the expansion valve;
当所述运转模式是制热模式时，将所述外机侧的膨胀阀开度调整为所述膨胀阀目标开度值。When the operation mode is the heating mode, the expansion valve opening of the external unit side is adjusted to the expansion valve target opening value.
优选地，在“根据所述运转模式与所述膨胀阀目标开度值调整所述多联机空调***中外机侧或内机侧膨胀阀的开度”的步骤之后，所述控制方法还包括：Preferably, after the step of “adjusting the opening degree of the expansion valve on the external unit side or the internal unit side of the multi-connected air conditioning system according to the operation mode and the target opening value of the expansion valve”, the control method further includes:
判断所述排气温度是否大于等于预设的排气温度阈值，或者所述排气过热度是否大于等于预设的排气过热度阈值；Determine whether the exhaust gas temperature is greater than or equal to a preset exhaust gas temperature threshold, or whether the exhaust gas superheat is greater than or equal to a preset exhaust gas superheat threshold;
若所述排气温度大于等于所述预设的排气温度阈值或者所述排气过热度大于等于所述预设的排气过热度阈值，则停止启动控制。If the exhaust gas temperature is greater than or equal to the preset exhaust gas temperature threshold or the exhaust gas superheat is greater than or equal to the preset exhaust gas superheat threshold, the start control is stopped.
优选地，所述外机内设置有排气温度传感器和高压压力传感器，“在所述多联机空调***启动过程中定时获取所述多联机空调***中压缩机的运转参数”的步骤具体包括：Preferably, the external unit is provided with an exhaust temperature sensor and a high-pressure pressure sensor, and the step of “timely acquiring the operating parameters of the compressor in the multi-connected air conditioning system during the startup of the multi-connected air conditioning system” specifically includes:
分别利用所述排气温度传感器与所述高压压力传感器定时获取所述排气温度值和所述高压压力。The exhaust gas temperature sensor and the high-pressure pressure sensor are used to periodically obtain the exhaust gas temperature value and the high-pressure pressure, respectively.
本发明的另一方面，提出一种多联机空调***，包括：控制装置；In another aspect of the present invention, a multi-line air conditioning system is proposed, including: a control device;
所述控制装置配置为：利用上面所述的多联机空调***的启动控制方法对膨胀阀的开度进行控制。The control device is configured to control the opening degree of the expansion valve using the above-mentioned start-up control method of the multi-line air conditioning system.
与最接近的现有技术相比，本发明至少具有如下有益效果：Compared with the closest prior art, the present invention has at least the following beneficial effects:
本发明提出的多联机空调***及其启动控制方法，定时获取压缩机启动过程中的运转参数，并据此调整膨胀阀的开度。相比现有技术中，在启动过程中膨胀阀维持固定开度的方法，本发明在有效防止液击的情况下，最大限度保证了多联机空调***的运行效果，保证***稳定可靠运转。The multi-line air-conditioning system and the startup control method proposed by the present invention regularly obtain the operating parameters during the startup of the compressor, and adjust the opening degree of the expansion valve accordingly. Compared with the method of the prior art in which the expansion valve maintains a fixed opening during the start-up process, the present invention effectively guarantees the operating effect of the multi-line air conditioning system to the greatest extent, and ensures the stable and reliable operation of the system while effectively preventing liquid blow.
附图说明BRIEF DESCRIPTION
图1是本发明的多联机空调***的启动控制方法实施例的主要步骤示意图。FIG. 1 is a schematic diagram of main steps of an embodiment of the startup control method of the multi-connected air conditioning system of the present invention.
具体实施方式detailed description
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。The preferred embodiments of the present invention are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
图1是本发明的多联机空调***的启动控制方法实施例的主要步骤示意图。本实施例中的多联机空调***包括外机和与外机相连的多个内机，外机侧与内机侧均设置有用于调节冷媒流量的膨胀阀，压缩机设置于外机内。如图1所示，本实施例的启动控制方法包括步骤S1-S3：FIG. 1 is a schematic diagram of main steps of an embodiment of the startup control method of the multi-connected air conditioning system of the present invention. The multi-line air conditioning system in this embodiment includes an external machine and a plurality of internal machines connected to the external machine. Both the external machine side and the internal machine side are provided with expansion valves for adjusting the flow rate of the refrigerant, and the compressor is provided in the external machine. As shown in FIG. 1, the startup control method of this embodiment includes steps S1-S3:
步骤S1，在多联机空调***启动过程中定时获取压缩机的运转参数。In step S1, the operating parameters of the compressor are periodically acquired during the startup process of the multi-line air conditioning system.
这里的运转参数包括：压缩机的排气温度值与高压压力。The operating parameters here include: the compressor discharge temperature value and high pressure.
本实施例中，外机内设置有排气温度传感器和高压压力传感器，分别利用排气温度传感器与高压压力传感器按预设的时间间隔定时获取排气温度值和高压压力。In this embodiment, an exhaust temperature sensor and a high-pressure pressure sensor are provided in the external unit, and the exhaust temperature sensor and the high-pressure pressure sensor are used to obtain the exhaust temperature value and the high-pressure pressure at preset time intervals, respectively.
步骤S2，根据运转参数调整膨胀阀的开度。该步骤可以具体包括步骤S21-S22：In step S2, the opening degree of the expansion valve is adjusted according to the operating parameters. This step may specifically include steps S21-S22:
步骤S21，获取多联机空调***的运转模式，并根据运转模式与运转参数计算膨胀阀目标开度值。该步骤可以具体包括步骤S211-S212：In step S21, the operation mode of the multi-connected air conditioning system is obtained, and the target opening value of the expansion valve is calculated according to the operation mode and the operation parameters. This step may specifically include steps S211-S212:
步骤S211，根据排气温度值与高压压力获取压缩机的排气过热度。该步骤又可以具体包括步骤S2111-S2112：Step S211: Obtain the exhaust gas superheat of the compressor according to the exhaust gas temperature value and the high-pressure pressure. This step may specifically include steps S2111-S2112:
步骤S2111，将高压压力转换为冷媒的饱和温度值；Step S2111, converting the high pressure to the saturation temperature value of the refrigerant;
步骤S2112，根据公式(1)计算排气过热度：In step S2112, the exhaust gas superheat is calculated according to formula (1):
TdSH＝Td-Pd_temp        (1)TdSH ＝ Td-Pd_temp (1)
其中，TdSH为排气过热度，Td为排气温度值；Pd_temp为冷媒的饱和温度值。Among them, TdSH is the exhaust gas superheat, Td is the exhaust gas temperature value; Pd_temp is the saturation temperature value of the refrigerant.
步骤S212，根据运转模式、排气温度值与排气过热度，获取膨胀阀目标开度值。该步骤可以具体包括步骤S2121-S2122：In step S212, the expansion valve target opening degree value is obtained according to the operation mode, the exhaust gas temperature value and the exhaust gas superheat degree. This step may specifically include steps S2121-S2122:
步骤S2121，根据运转模式、排气温度值与排气过热度计算膨胀阀初始目标开度值LEVpos，如公式(2)所示：In step S2121, the initial target opening value LEVpos of the expansion valve is calculated according to the operation mode, the exhaust temperature value and the exhaust superheat degree, as shown in formula (2):
Figure PCTCN2019087030-appb-000002
Figure PCTCN2019087030-appb-000002
其中，△Td i为第i次获取的排气温度值Td i与第i-1次获取的排气温度值Td i-1之间的差值；i为按时间顺序排列的排气温度值的序号，i＝1,2,...,N，N为当前已获取的排气温度值的总次数；特别地，当计算△Td 1时，可以用Td 1减去一个预设的初始值；W 1和W 2均为预设的权重且W 1+W 2＝1，Rate 1和Rate 2均为预设的换算系数，并且W 1、W 2、Rate 1和Rate 2均取决于运转模式；W 1、W 2、Rate 1和Rate 2均可根据压缩机类型、制冷/制热模式和实验情况确定；TdSH为排气过热度；Th 1为预设的排气过热度的阈值，用于判断TdSH是否正常；Th 2为预设的排气温度值的差值的阈值， 用于判断△Td i是否正常；
Figure PCTCN2019087030-appb-000003
为自***开始启动以来计算出的(△Td i-Th 2)值的累加值。 Wherein, △ Td i is acquired exhaust temperature Td i i-th value of the first i-1 times the value of the acquired exhaust temperature difference Td between the i-1; i is the exhaust gas temperature value in chronological order the number, i = 1,2, ..., N , N is the total number of the exhaust gas temperature value currently acquired; in particular, when calculating △ Td 1, it is possible by subtracting a preset initial Td 1 Value; W 1 and W 2 are preset weights and W 1 + W 2 = 1, Rate 1 and Rate 2 are preset conversion coefficients, and W 1 , W 2 , Rate 1 and Rate 2 all depend on Operation mode; W 1 , W 2 , Rate 1 and Rate 2 can be determined according to compressor type, cooling / heating mode and experimental conditions; TdSH is the exhaust superheat; Th 1 is the preset exhaust superheat threshold , Used to judge whether TdSH is normal; Th 2 is a preset threshold value of the difference in exhaust temperature, used to judge whether △ Td i is normal;
Figure PCTCN2019087030-appb-000003
It is the cumulative value of (ΔTd i -Th 2 ) values calculated since the system started.
步骤S2122，比较LEVpos与预设的膨胀阀阈值(包括预设的膨胀阀开度最小值MinPos和预设的膨胀阀开度最大值MaxPos)，根据比较结果获取膨胀阀目标开度值LEVpos′：Step S2122, compare LEVpos with a preset expansion valve threshold (including a preset minimum expansion valve opening degree MinPos and a predetermined expansion valve opening maximum value MaxPos), and obtain an expansion valve target opening value LEVpos ′ according to the comparison result:
若LEVpos<MinPos，则膨胀阀目标开度值LEVpos′＝MinPos；若LEVpos>MaxPos，则膨胀阀目标开度值LEVpos′＝MaxPos；若MinPos≤LEVpos≤MaxPos，则膨胀阀目标开度值LEVpos′＝LEVpos。If LEVpos <MinPos, the expansion valve target opening value LEVpos ′ = MinPos; if LEVpos> MaxPos, the expansion valve target opening value LEVpos ′ = MaxPos; if MinPos ≦ LEVpos ≦ MaxPos, the expansion valve target opening value LEVpos ′ = LEVpos.
步骤S22，根据运转模式与膨胀阀目标开度值调整外机侧或内机侧膨胀阀的开度，具体为：In step S22, the opening degree of the expansion valve on the external or internal machine side is adjusted according to the operation mode and the target opening value of the expansion valve, specifically:
当运转模式是制冷模式时，将每个开机内机侧的膨胀阀开度调整为所述膨胀阀目标开度值；When the operation mode is the cooling mode, the opening degree of the expansion valve on the engine side of each start-up is adjusted to the target opening degree value of the expansion valve;
当运转模式是制热模式时，将外机侧的膨胀阀开度调整为膨胀阀目标开度值。When the operation mode is the heating mode, the expansion valve opening degree on the external unit side is adjusted to the expansion valve target opening degree value.
步骤S3，判断排气温度是否大于等于预设的排气温度阈值，或者排气过热度是否大于等于预设的排气过热度阈值，若排气温度大于等于预设的排气温度阈值或者排气过热度大于等于预设的排气过热度阈值，则停止启动控制。之后，恢复自动控制，内外机膨胀阀根据各自的控制逻辑控制开度。Step S3: Determine whether the exhaust temperature is greater than or equal to the preset exhaust temperature threshold, or whether the exhaust superheat is greater than or equal to the preset exhaust superheat threshold, if the exhaust temperature is greater than or equal to the preset exhaust temperature threshold or exhaust If the gas superheat degree is greater than or equal to the preset exhaust gas superheat threshold value, the start control is stopped. After that, automatic control is resumed, and the expansion valves of the internal and external units control the opening degree according to their respective control logics.
预设的排气过热度阈值MinNormalSH为***进入正常运转时的最小排气过热度，通常为20度。预设的排气温度阈值MinNormalTd为***进入正常运转时的最小排气温度，通常为70度。这两个参数通常根据压缩机规格书选定。The preset exhaust gas superheat threshold MinNormalSH is the minimum exhaust gas superheat when the system enters normal operation, usually 20 degrees. The preset exhaust temperature threshold MinNormalTd is the minimum exhaust temperature when the system enters normal operation, usually 70 degrees. These two parameters are usually selected according to the compressor specifications.
上述实施例中虽然将各个步骤按照上述先后次序的方式进行了描述，但是本领域技术人员可以理解，为了实现本实施例的效果，不同的步骤之间不必按照这样的次序执行，其可以同时(并行)执行或以颠倒的次序执行，这些简单的变化都在本发明的保护范围之内。Although the steps have been described in the above order in the above embodiment, those skilled in the art can understand that in order to achieve the effect of this embodiment, different steps need not be executed in this order, and they can be simultaneously ( Parallel execution or in reverse order, these simple changes are within the scope of the present invention.
下面举例说明本实施例中膨胀阀目标开度值的计算方法：The following illustrates the calculation method of the target opening value of the expansion valve in this embodiment:
例如，在制冷模式下设定参数W 1＝0.4，W 2＝0.6，Rate 1＝3， Rate 2＝8，MinPos＝32，MaxPos＝100，Th 1、Th 2一般参考厂家的压缩机规格书来确定，这里按Th 1＝10，Th 2＝3；每隔10秒钟获取一次排气温度值Td和高压压力，并据此计算出Pd_temp、△Td、TdSH和LEVpos，如表1所示： For example, in the cooling mode, set the parameters W 1 = 0.4, W 2 = 0.6, Rate 1 = 3, Rate 2 = 8, MinPos = 32, MaxPos = 100, Th 1 and Th 2 generally refer to the compressor specifications of the manufacturer To determine, here according to Th 1 = 10, Th 2 = 3; get the exhaust temperature value Td and high pressure every 10 seconds, and calculate Pd_temp, △ Td, TdSH and LEVpos accordingly, as shown in Table :
表1Table 1
时间time 本次TdThis Td Pd_tempPd_temp TdSHTdSH 上次TdLast Td ΔTdΔTd LEVpos(单位：pls)LEVpos (Unit: pls)
T1T1 28.328.3 20.220.2 8.18.1 20.520.5 7.87.8 20.7620.76
T2T2 34.534.5 25.325.3 9.29.2 28.328.3 6.26.2 37.4437.44
T3T3 43.243.2 27.627.6 15.615.6 34.534.5 8.78.7 72.4872.48
T4T4 42.142.1 28.228.2 13.913.9 43.243.2 -1.1-1.1 50.7650.76
T5T5 45.645.6 32.232.2 13.413.4 42.142.1 3.53.5 52.5652.56
T6T6 54.354.3 35.735.7 18.618.6 45.645.6 8.78.7 86.1686.16
在T1时刻按照公式(2)计算：According to formula (2) at time T1:
LEVpos＝0.4*3*(8.1-10)+0.6*8*(7.8-3)＝20.76LEVpos = 0.4 * 3 * (8.1-10) + 0.6 * 8 * (7.8-3) = 20.76
因为20.76<MinPos，所以，膨胀阀目标开度值LEVpos′＝32pls。Because 20.76 <MinPos, the expansion valve target opening value LEVpos ′ = 32pls.
在T2时刻按照公式(2)计算：According to formula (2) at time T2:
LEVpos＝0.4*3*(9.2-10)LEVpos ＝ 0.4 * 3 * (9.2-10)
+0.6*8*(7.8-3)+0.6*8*(6.2-3)+ 0.6 * 8 * (7.8-3) + 0.6 * 8 * (6.2-3)
＝37.44= 37.44
因为MinPos≤37.44≤MaxPos，所以，膨胀阀目标开度值LEVpos′＝37.44pls。Since MinPos≤37.44≤MaxPos, the target opening value of the expansion valve LEVpos' = 37.44pls.
T1-T6时刻可以采用类似的计算方法得出膨胀阀目标开度值LEVpos′。A similar calculation method can be used at T1-T6 to obtain the target opening value LEVpos' of the expansion valve.
基于与方法实施例相同的技术构思，本发明还提供了一种多联机空调***的实施例，本实施例的多联机空调***包括：控制装置。该控制装置配置为：利用上面所述的多联机空调***的启动控制方法对多联机空调***中膨胀阀的开度进行控制。Based on the same technical concept as the method embodiment, the present invention also provides an embodiment of a multi-connected air conditioning system. The multi-connected air conditioning system of this embodiment includes: a control device. The control device is configured to control the opening degree of the expansion valve in the multi-connected air-conditioning system using the above-mentioned multi-connected air-conditioning system startup control method.
本领域技术人员应该能够意识到，结合本文中所公开的实施例描述的各示例的方法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明电子硬件和软件的可互换性，在上述说明 中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以电子硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。Those skilled in the art should be able to realize that the method steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the possibilities of electronic hardware and software Interchangeability, in the above description, the composition and steps of each example have been generally described according to function. Whether these functions are performed by electronic hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征做出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easily understood by those skilled in the art that the scope of protection 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 replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the protection scope of the present invention.

Claims (10)

  1. 一种多联机空调***的启动控制方法，其特征在于，所述启动控制方法包括：A startup control method for a multi-line air conditioning system, characterized in that the startup control method includes:
    在所述多联机空调***启动过程中定时获取所述多联机空调***中压缩机的运转参数；During the start-up process of the multi-connected air conditioning system, regularly obtain the operating parameters of the compressor in the multi-connected air conditioning system;
    根据所述运转参数调整所述多联机空调***中膨胀阀的开度。The opening degree of the expansion valve in the multi-line air conditioning system is adjusted according to the operating parameters.
  2. 根据权利要求1所述的多联机空调***的启动控制方法，其特征在于，“根据所述运转参数调整所述多联机空调***中膨胀阀的开度”的步骤包括：The starting control method of the multi-connected air-conditioning system according to claim 1, wherein the step of "adjusting the opening degree of the expansion valve in the multi-connected air-conditioning system according to the operating parameters" includes:
    获取所述多联机空调***的运转模式，并根据所述运转模式与所述运转参数计算膨胀阀目标开度值；Obtain the operation mode of the multi-line air conditioning system, and calculate the expansion valve target opening value according to the operation mode and the operation parameters;
    根据所述运转模式与所述膨胀阀目标开度值调整所述多联机空调***中外机侧或内机侧膨胀阀的开度。According to the operation mode and the target opening value of the expansion valve, the opening degree of the expansion valve on the external unit side or the internal unit side of the multi-line air conditioning system is adjusted.
  3. 根据权利要求2所述的多联机空调***的启动控制方法，其特征在于，所述运转参数包括：所述压缩机的排气温度值与高压压力；“根据所述运转模式与所述运转参数计算膨胀阀目标开度值”的步骤包括：The start-up control method of the multi-connected air-conditioning system according to claim 2, wherein the operating parameters include: the exhaust temperature value and high-pressure pressure of the compressor; "according to the operating mode and the operating parameters The steps to calculate the target opening value of the expansion valve include:
    根据所述排气温度值与所述高压压力获取所述压缩机的排气过热度；Obtaining the exhaust gas superheat of the compressor according to the exhaust gas temperature value and the high-pressure pressure;
    根据所述运转模式、所述排气温度值与所述排气过热度，获取所述膨胀阀目标开度值。The target opening value of the expansion valve is obtained according to the operation mode, the exhaust gas temperature value, and the exhaust gas superheat degree.
  4. 根据权利要求3所述的多联机空调***的启动控制方法，其特征在于，“根据所述排气温度值与所述高压压力获取所述压缩机的排气过热度”的步骤包括：The startup control method of the multi-connected air-conditioning system according to claim 3, wherein the step of "acquiring the exhaust superheat of the compressor according to the exhaust temperature value and the high-pressure pressure" includes:
    将所述高压压力转换为冷媒的饱和温度值；Converting the high-pressure pressure to the saturation temperature value of the refrigerant;
    根据下式计算所述排气过热度：Calculate the exhaust superheat according to the following formula:
    TdSH＝Td-Pd_tempTdSH = Td-Pd_temp
    其中，TdSH为所述排气过热度，Td为所述排气温度值；Pd_temp为 所述冷媒的饱和温度值。Where TdSH is the exhaust gas superheat, Td is the exhaust gas temperature value; Pd_temp is the saturation temperature value of the refrigerant.
  5. 根据权利要求4所述的多联机空调***的启动控制方法，其特征在于，“根据所述运转模式、所述排气温度值与所述排气过热度，获取所述膨胀阀目标开度值”的步骤包括：The start-up control method of the multi-connected air-conditioning system according to claim 4, wherein "the target opening value of the expansion valve is obtained according to the operation mode, the exhaust temperature value and the exhaust superheat degree "Steps include:
    根据所述运转模式、所述排气温度值与所述排气过热度计算膨胀阀初始目标开度值LEVpos；Calculating the initial target opening value LEVpos of the expansion valve according to the operating mode, the exhaust temperature value and the exhaust superheat degree;
    比较所述LEVpos与预设的膨胀阀阈值，所述膨胀阀阈值包括预设的膨胀阀开度最小值MinPos和预设的膨胀阀开度最大值MaxPos；Comparing the LEVpos with a preset expansion valve threshold, the expansion valve threshold including a preset minimum expansion valve opening MinMin and a predetermined maximum expansion valve opening MaxPos;
    根据比较结果获取所述膨胀阀目标开度值：若LEVpos<MinPos，则所述膨胀阀目标开度值为MinPos；若LEVpos>MaxPos，则所述膨胀阀目标开度值为MaxPos；若MinPos≤LEVpos≤MaxPos，则所述膨胀阀目标开度值为LEVpos。Obtain the target opening value of the expansion valve according to the comparison result: if LEVpos <MinPos, the target opening value of the expansion valve is MinPos; if LEVpos> MaxPos, the target opening value of the expansion valve is MaxPos; if MinPos≤ LEVpos≤MaxPos, then the target opening value of the expansion valve is LEVpos.
  6. 根据权利要求5所述的多联机空调***的启动控制方法，其特征在于，“根据所述运转模式、所述排气温度值与所述排气过热度计算膨胀阀初始目标开度值LEVpos”的步骤包括：The startup control method of the multi-connected air-conditioning system according to claim 5, characterized in that "the initial target opening value of the expansion valve LEVpos is calculated based on the operation mode, the exhaust gas temperature value and the exhaust gas superheat degree" The steps include:
    根据所述运转模式、所述排气温度值与所述排气过热度并且按照下式计算所述膨胀阀初始目标开度值LEVpos：According to the operation mode, the exhaust gas temperature value and the exhaust gas superheat degree and calculate the initial target opening value LEVpos of the expansion valve according to the following formula:
    Figure PCTCN2019087030-appb-100001
    Figure PCTCN2019087030-appb-100001
    其中，△Td i为第i次获取的排气温度值Td i与第i-1次获取的排气温度值Td i-1之间的差值；i为按时间顺序排列的所述排气温度值的序号，i＝1,2,...,N，N为当前已获取的所述排气温度值的总次数；W 1和W 2均为预设的权重且W 1+W 2＝1，Rate 1和Rate 2均为预设的换算系数，并且所述W 1、W 2、Rate 1和Rate 2均取决于所述运转模式；TdSH为所述排气过热度；Th 1为预设的排气过热度的阈值；Th 2为预设的所述排气温度值的差值的阈值。 Wherein, △ Td i is the i-th acquired exhaust temperature value Td i i-1 and the first exhaust gas temperature value currently obtained difference Td between the i-1; i is arranged in the exhaust chronologically The serial number of the temperature value, i = 1, 2, ..., N, N is the total number of the exhaust gas temperature values currently obtained; W 1 and W 2 are both preset weights and W 1 + W 2 = 1, Rate 1 and Rate 2 are preset conversion factors, and the W 1 , W 2 , Rate 1 and Rate 2 all depend on the operating mode; TdSH is the exhaust superheat; Th 1 is A preset threshold value of exhaust gas superheat; Th 2 is a preset threshold value of the difference between the exhaust gas temperature values.
  7. 根据权利要求2至6中任一项所述的多联机空调***的启动控制方法，其特征在于，“根据所述运转模式与所述膨胀阀目标开度值调整所 述多联机空调***中外机侧或内机侧膨胀阀的开度”的步骤包括：The start-up control method of a multi-connected air-conditioning system according to any one of claims 2 to 6, characterized in that "the external and external units of the multi-connected air-conditioning system are adjusted according to the operation mode and the target opening value of the expansion valve The steps of "the opening of the expansion valve on the side or internal side" include:
    当所述运转模式是制冷模式时，将每个开机内机侧的膨胀阀开度调整为所述膨胀阀目标开度值；When the operation mode is the cooling mode, adjust the opening degree of the expansion valve on the engine side of each start-up to the target opening degree value of the expansion valve;
    当所述运转模式是制热模式时，将所述外机侧的膨胀阀开度调整为所述膨胀阀目标开度值。When the operation mode is the heating mode, the expansion valve opening of the external unit side is adjusted to the expansion valve target opening value.
  8. 根据权利要求3至6中任一项所述的多联机空调***的启动控制方法，其特征在于，在“根据所述运转模式与所述膨胀阀目标开度值调整所述多联机空调***中外机侧或内机侧膨胀阀的开度”的步骤之后，所述控制方法还包括：The start-up control method of a multi-connected air-conditioning system according to any one of claims 3 to 6, characterized in that the "adjustment of the multi-connected air-conditioning system according to the operation mode and the target opening value of the expansion valve After the step of opening the expansion valve on the engine side or the engine side, the control method further includes:
    判断所述排气温度是否大于等于预设的排气温度阈值，或者所述排气过热度是否大于等于预设的排气过热度阈值；Determine whether the exhaust gas temperature is greater than or equal to a preset exhaust gas temperature threshold, or whether the exhaust gas superheat is greater than or equal to a preset exhaust gas superheat threshold;
    若所述排气温度大于等于所述预设的排气温度阈值或者所述排气过热度大于等于所述预设的排气过热度阈值，则停止启动控制。If the exhaust gas temperature is greater than or equal to the preset exhaust gas temperature threshold or the exhaust gas superheat is greater than or equal to the preset exhaust gas superheat threshold, the start control is stopped.
  9. 根据权利要求3至6中任一项所述的多联机空调***的启动控制方法，其特征在于，所述外机内设置有排气温度传感器和高压压力传感器，“在所述多联机空调***启动过程中定时获取所述多联机空调***中压缩机的运转参数”的步骤具体包括：The start-up control method of a multi-connected air-conditioning system according to any one of claims 3 to 6, characterized in that an exhaust temperature sensor and a high-pressure pressure sensor are provided in the external unit, "in the multi-connected air-conditioning system The step of regularly acquiring the operating parameters of the compressor in the multi-line air conditioning system during the startup process specifically includes:
    分别利用所述排气温度传感器与所述高压压力传感器定时获取所述排气温度值和所述高压压力。The exhaust gas temperature sensor and the high-pressure pressure sensor are used to periodically obtain the exhaust gas temperature value and the high-pressure pressure, respectively.
  10. 一种多联机空调***，其特征在于包括：控制装置；A multi-line air-conditioning system, which is characterized by comprising: a control device;
    所述控制装置配置为：利用权利要求1-9中任一项所述的多联机空调***的启动控制方法对膨胀阀的开度进行控制。The control device is configured to control the opening degree of the expansion valve using the start-up control method of the multi-line air conditioning system according to any one of claims 1-9.
PCT/CN2019/087030 2018-11-19 2019-05-15 Multi-split air conditioning system and start control method therefor WO2020103407A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811376055.7A CN109631279B (en) 2018-11-19 2018-11-19 Multi-split air conditioning system and starting control method thereof
CN201811376055.7 2018-11-19

Publications (1)

Publication Number Publication Date
WO2020103407A1 true WO2020103407A1 (en) 2020-05-28

Family

ID=66068458

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/087030 WO2020103407A1 (en) 2018-11-19 2019-05-15 Multi-split air conditioning system and start control method therefor

Country Status (2)

Country Link
CN (1) CN109631279B (en)
WO (1) WO2020103407A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109631279B (en) * 2018-11-19 2021-05-25 青岛海尔空调电子有限公司 Multi-split air conditioning system and starting control method thereof
CN110567048B (en) * 2019-09-27 2021-06-01 海信（山东）空调有限公司 Control method and device for electronic expansion valve in multi-split air conditioning operation
CN112524765B (en) * 2020-12-08 2022-10-28 青岛海尔空调器有限总公司 Expansion valve control method and device for air conditioner, electronic equipment and storage medium
CN115406064A (en) * 2021-05-26 2022-11-29 美的集团股份有限公司 Multi-split air conditioner control method, device, equipment and storage medium
CN113375287B (en) * 2021-06-25 2022-04-19 宁波奥克斯电气股份有限公司 Low-voltage sensor fault identification control method and device and multi-split air conditioning system
CN114251789B (en) * 2021-12-21 2023-03-24 宁波奥克斯电气股份有限公司 Control method and device for improving operation energy efficiency of multi-split heating mode and multi-split air conditioner
CN114484735B (en) * 2022-03-11 2023-08-15 青岛海信日立空调***有限公司 Multi-split system fault diagnosis and energy-saving potential identification method and multi-split system
CN114811860B (en) * 2022-03-28 2023-11-24 青岛海尔空调电子有限公司 Control method of multi-split air conditioning system and multi-split air conditioning system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104930773A (en) * 2015-07-06 2015-09-23 珠海格力电器股份有限公司 Control method and device of electronic expansion valve and air conditioner
CN105864981A (en) * 2016-04-26 2016-08-17 海信（山东）空调有限公司 Adjusting method and system for multi-split air conditioner
CN107642873A (en) * 2017-10-31 2018-01-30 海信（山东）空调有限公司 Electronic expansion valve opening control method when a kind of air-conditioning and its startup
CN109631279A (en) * 2018-11-19 2019-04-16 青岛海尔空调电子有限公司 Multi-online air-conditioning system and its starting control method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008209021A (en) * 2007-02-23 2008-09-11 Mitsubishi Heavy Ind Ltd Multi-air conditioner
CN106152391B (en) * 2015-04-28 2019-05-21 青岛海尔空调电子有限公司 A method of the compressor exhaust temperature for controlling Super long tube air-conditioning is excessively high
CN106556099B (en) * 2015-09-25 2019-05-17 日立江森自控空调有限公司 The control method of the electric expansion valve of the indoor unit of multi-online air-conditioning system
CN105352239B (en) * 2015-11-02 2018-07-31 青岛海尔空调器有限总公司 The control method of air conditioner electronic expansion valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104930773A (en) * 2015-07-06 2015-09-23 珠海格力电器股份有限公司 Control method and device of electronic expansion valve and air conditioner
CN105864981A (en) * 2016-04-26 2016-08-17 海信（山东）空调有限公司 Adjusting method and system for multi-split air conditioner
CN107642873A (en) * 2017-10-31 2018-01-30 海信（山东）空调有限公司 Electronic expansion valve opening control method when a kind of air-conditioning and its startup
CN109631279A (en) * 2018-11-19 2019-04-16 青岛海尔空调电子有限公司 Multi-online air-conditioning system and its starting control method

Also Published As

Publication number Publication date
CN109631279A (en) 2019-04-16
CN109631279B (en) 2021-05-25

Similar Documents

Publication Publication Date Title
WO2020103407A1 (en) Multi-split air conditioning system and start control method therefor
WO2020062598A1 (en) Operation control method and apparatus for water multi-split unit, and medium and water multi-split air-conditioning system
CN105627524B (en) Air conditioner anti-freeze control method and air conditioner
WO2020062597A1 (en) Method, device and system for detecting refrigerant content of temperature regulation apparatus, and air conditioner
WO2014190737A1 (en) Oil return method for multiple air conditioning unit in heating
CN103807970A (en) Control method and control device of air conditioner
WO2020094009A1 (en) Control method for indoor unit valve of multi-split air-conditioning system
US20200191430A1 (en) Method and device for controlling expansion valve
CN109506315A (en) A kind of air conditioner and the control method for preventing compressor from running with liquid
CN107763792B (en) Control method of multi-connected air conditioning unit
CN109855251B (en) Exhaust superheat correction method and device for air conditioner, computer product and air conditioner
WO2019148972A1 (en) Method and device for controlling formation of condensate water, and computer storage medium
CN113108439A (en) Control method and device of air conditioner, air conditioner and storage medium
CN108413586A (en) The method for noise reduction control and multi-connected machine of multi-connected machine
CN113028590B (en) Air conditioner low-temperature refrigeration control method and device and air conditioner
CN111397142B (en) Control method and device for electronic expansion valve of air conditioner, air conditioner and storage medium
WO2021078033A1 (en) Method for controlling heating belt of compressor
CN110762673A (en) Cold water air conditioning system, anti-freezing control method thereof, storage medium and computer equipment
CN110044005A (en) A kind of air conditioning control method, device and air-conditioning
CN114234383A (en) Air conditioner control method and device
CN110779146B (en) Air conditioner and electronic expansion valve control method thereof, storage medium and computer equipment
CN114811860B (en) Control method of multi-split air conditioning system and multi-split air conditioning system
WO2021072954A1 (en) Compressor lubrication adjusting method and device, electronic equipment, and storage medium
CN114935169A (en) Air conditioner, control method thereof, and computer-readable storage medium
EP4215841A1 (en) Refrigeration-cycle device, air conditioner comprising same, and method for controlling refrigeration-cycle device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19887959

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19887959

Country of ref document: EP

Kind code of ref document: A1