CN104879875A - Method for controlling inner devices of multi-device-connected air-conditioning system and multi-device-connected air-conditioning system - Google Patents
Method for controlling inner devices of multi-device-connected air-conditioning system and multi-device-connected air-conditioning system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
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- F24—HEATING; RANGES; VENTILATING
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- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
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- 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
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Abstract
本发明公开了一种多联机空调系统内机控制方法及多联机空调系统,属于空调及其控制方法领域,为解决多台内机无法联合控制的问题而设计。本发明多联机空调系统内机控制方法是分别为多台内机设定等级,系统控制器分别控制每台内机的膨胀阀开度以保证等级高的内机能优先处于膨胀阀开度值小于其最大开度值MaxVal-ij的工作状态。本发明多联机空调系统包括外机和至少两台内机,每台内机上设有膨胀阀,空调系统还包括系统控制器,系统控制器用于检测和控制每台内机膨胀阀的开度值。本发明多联机空调系统内机控制方法及多联机空调系统能根据等级来保证等级高的内机优先满足使用要求,结构合理,使用方便,适用范围广。
The invention discloses a method for controlling an internal unit of a multi-connected air-conditioning system and the multi-connected air-conditioning system, which belong to the field of air conditioners and control methods thereof, and are designed to solve the problem that multiple internal units cannot be jointly controlled. The method for controlling the internal units of the multi-connected air-conditioning system of the present invention is to set the levels for multiple internal units respectively, and the system controller controls the opening of the expansion valve of each internal unit respectively to ensure that the internal units with higher levels are preferentially located when the expansion valve opening value is less than The working state of its maximum opening value MaxVal-ij. The multi-connected air-conditioning system of the present invention includes an external unit and at least two internal units, each of which is provided with an expansion valve, and the air-conditioning system also includes a system controller, which is used to detect and control the opening value of the expansion valve of each internal unit . The control method for the internal units of the multi-connected air-conditioning system and the multi-connected air-conditioning system of the present invention can ensure that the internal units with higher grades meet the use requirements preferentially according to the grades, and have reasonable structure, convenient use and wide application range.
Description
技术领域technical field
本发明涉及一种多联机空调系统内机控制方法以及实现该控制方法的多联机空调系统。The invention relates to a method for controlling an internal unit of a multi-connected air-conditioning system and a multi-connected air-conditioning system for realizing the control method.
背景技术Background technique
多联机空调系统是指一台室外机连接两台或者两台以上的室内机。多联机空调系统通常由安装在不同使用环境中的内机组成。使用环境对内机空调效果的要求和影响很大。以制热为例,阳光充足的房间比阴暗潮湿的房间需要的制热负荷要少的多,VIP用户房间比普通用户房间对空调效果要求高,同一时间里需要能够优先能够满足VIP用户的制热需求。A multi-connected air conditioning system refers to an outdoor unit connected to two or more indoor units. A multi-split air-conditioning system usually consists of indoor units installed in different usage environments. The use environment has great requirements and influence on the effect of the air conditioner of the indoor unit. Taking heating as an example, a sunny room requires much less heating load than a dark and humid room. VIP user rooms have higher requirements for air conditioning effects than ordinary user rooms. heat demand.
现有多联机内机通常采用膨胀阀来控制由外机进入内机换热器的冷媒流量。具体的,膨胀阀的开度大小是根据内机换热器的盘管温度来计算得到的。内机自发控制膨胀阀开度只是进行点控制,不能从整体上实现内机个性化效果差异,无法优先保证重要场所的空调效果。Existing multi-connected internal units usually use expansion valves to control the flow of refrigerant entering the heat exchanger of the internal unit from the external unit. Specifically, the opening degree of the expansion valve is calculated according to the coil temperature of the heat exchanger of the internal unit. The spontaneous control of the opening of the expansion valve by the internal unit is only a point control, which cannot realize the individualized effect difference of the internal unit as a whole, and cannot give priority to ensuring the air-conditioning effect of important places.
发明内容Contents of the invention
本发明的一个目的是提出一种能保证等级高的内机优先满足使用要求的多联机空调系统内机控制方法。An object of the present invention is to propose a control method for internal units of a multi-connected air-conditioning system that can ensure that high-level internal units meet the use requirements first.
本发明的还一个目的是提出一种能多台内机联合控制的多联机空调系统。Another object of the present invention is to propose a multi-connected air-conditioning system capable of joint control of multiple indoor units.
为达此目的,一方面,本发明采用以下技术方案:For reaching this purpose, on the one hand, the present invention adopts following technical scheme:
一种多联机空调系统内机控制方法,该方法是分别为多台内机设定等级,系统控制器分别控制每台内机的膨胀阀开度以保证等级高的内机能优先处于膨胀阀开度值小于其最大开度值MaxVal-ij的工作状态。A method for controlling internal units of a multi-connected air-conditioning system. The method is to set levels for multiple internal units respectively, and the system controller controls the opening of the expansion valve of each internal unit separately to ensure that the internal units with higher levels are preferentially opened at the expansion valve. The working state where the degree value is less than its maximum opening value MaxVal-ij.
特别是,通过降低低等级的内机的膨胀阀开度使高等级的内机膨胀阀开度值小于其最大开度值MaxVal-ij。In particular, by reducing the opening of the expansion valve of the low-level internal unit, the opening value of the expansion valve of the high-level internal unit is smaller than its maximum opening value MaxVal-ij.
特别是,所述方法包括下述步骤:In particular, the method comprises the steps of:
步骤1、为系统内每台内机设定编码ij,其中,i表征此台内机的等级为第i级,1≤i≤N,N为全部的内机等级数;j表征此台内机是第i级中的第j台内机,1≤j≤Mi,Mi为第i级拥有的内机数;Step 1. Set the code ij for each indoor unit in the system, where i indicates that the level of this indoor unit is the i-th level, 1≤i≤N, and N is the number of levels of all indoor units; j indicates that the level of this indoor unit The machine is the j-th internal machine in the i-th level, 1≤j≤Mi, and Mi is the number of internal machines in the i-th level;
步骤2、为每台内机的膨胀阀设定最小开度值MinVal-ij、以及最大开度值MaxVal-ij;设置i的初始值为N,设置j的初始值为1;Step 2. Set the minimum opening value MinVal-ij and the maximum opening value MaxVal-ij for the expansion valve of each internal unit; set the initial value of i to N, and set the initial value of j to 1;
步骤3、检测第ij台内机的膨胀阀开度值是否大于等于其最大开度值MaxVal-ij,大于等于则转至步骤4;小于则转至步骤5;Step 3. Detect whether the opening value of the expansion valve of the ij-th indoor unit is greater than or equal to its maximum opening value MaxVal-ij. If it is greater than or equal to, go to step 4; if it is smaller, go to step 5;
步骤4、降低第i-1级至第1级中每台内机的膨胀阀开度,转至步骤3;Step 4. Decrease the expansion valve opening of each internal unit in the i-1st stage to the 1st stage, and go to step 3;
步骤5、判断步骤3中j是否等于Mi,不等于则j赋值为j+1并转至步骤3;等于则转至步骤6;Step 5. Judging whether j in step 3 is equal to Mi, if not equal, j is assigned a value of j+1 and goes to step 3; if it is equal, go to step 6;
步骤6、将第i-1级至第1级中每台内机当前的膨胀阀开度值记录分别为该内机新的最大开度值MaxVal;i赋值为i-1、j赋值为1,转至步骤7;Step 6. Record the current expansion valve opening value of each internal unit from level i-1 to level 1 as the new maximum opening value MaxVal of the internal unit; assign i to i-1 and j to 1 , go to step 7;
步骤7、判断i是否等于1,等于则转至步骤8;不等于则转至步骤3;Step 7, judge whether i is equal to 1, if it is equal, go to step 8; if it is not equal, go to step 3;
步骤8、程序结束。Step 8, the program ends.
进一步,在步骤3中,降低第i-1级至第1级中每台内机的膨胀阀开度的方法为:将第i-1级至第1级中每台内机的膨胀阀开度值调整为当前值的K倍,其中,0<K<1。Further, in step 3, the method of reducing the opening degree of the expansion valve of each internal unit in the i-1th stage to the first stage is: open the expansion valve of each internal machine in the i-1th stage to the first stage The degree value is adjusted to K times the current value, where 0<K<1.
再进一步,不同等级的内机所对应的K值不同。Furthermore, the K values corresponding to different grades of internal units are different.
更进一步,内机的等级越低则对应的K值越小。Furthermore, the lower the level of the internal unit, the smaller the corresponding K value.
特别是,当内机的膨胀阀开度值为最小开度值时则不进行调整。In particular, no adjustment is made when the opening degree of the expansion valve of the internal unit is the minimum opening value.
特别是,当系统重新开机或重启后,则系统控制器重新按照等级由高至低的顺序依次检测每台内机的膨胀阀是否工作在最大开度值。In particular, when the system is restarted or restarted, the system controller will sequentially detect whether the expansion valve of each internal unit is working at the maximum opening value according to the order of levels from high to low.
另一方面,本发明采用以下技术方案:On the other hand, the present invention adopts the following technical solutions:
一种用于实现上述内机控制方法的多联机空调系统,所述空调系统包括外机和至少两台内机,每台内机上设有膨胀阀,所述空调系统还包括系统控制器,所述系统控制器用于检测和控制每台内机膨胀阀的开度值。A multi-connected air-conditioning system for realizing the control method of the above-mentioned internal units, the air-conditioning system includes an external unit and at least two internal units, each internal unit is provided with an expansion valve, the air-conditioning system also includes a system controller, the The system controller described above is used to detect and control the opening value of the expansion valve of each internal unit.
特别是,所述系统控制器设置在所述外机上。In particular, the system controller is arranged on the external machine.
本发明多联机空调系统内机控制方法是根据等级来保证等级高的内机能优先满足使用要求,即等级高的内机能优先处于膨胀阀开度值小于其最大开度值MaxVal-ij的工作状态,将多台内机联合调整,资源(冷媒)调配更加合理,能够让VIP用户等需要优选满足使用要求的房间内的内机工作在更为合理的状态。不同等级内机对应不同的系数K,可以让调整更为高效,为后续的低等级内机调整带来便利。The control method of the internal unit of the multi-connected air-conditioning system of the present invention is based on the level to ensure that the high-level internal function meets the use requirements first, that is, the high-level internal function is preferentially in the working state where the opening value of the expansion valve is smaller than its maximum opening value MaxVal-ij , the joint adjustment of multiple indoor units makes the allocation of resources (refrigerant) more reasonable, and enables VIP users and other indoor units to work in a more reasonable state in rooms that need to meet the requirements of use. Different levels of internal units correspond to different coefficients K, which can make the adjustment more efficient and bring convenience to the subsequent adjustment of low-level internal units.
本发明多联机空调系统实现了上述内机控制方法,结构合理,使用方便,适用范围广。The multi-connected air-conditioning system of the present invention realizes the above-mentioned internal machine control method, has a reasonable structure, is convenient to use, and has a wide application range.
附图说明Description of drawings
图1是本发明优选实施例一多联机空调系统内机控制方法流程图。Fig. 1 is a flow chart of a method for controlling an internal unit of a multi-connected air-conditioning system according to a preferred embodiment of the present invention.
具体实施方式Detailed ways
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
优选实施例一:Preferred embodiment one:
本优选实施例提供一种多联机空调系统内机控制方法,该方法是分别为多台内机设定等级,系统控制器分别控制每台内机的膨胀阀开度以保证等级高的内机能优先处于膨胀阀开度值小于其最大开度值MaxVal-ij的工作状态。其中,通过降低低等级的内机的膨胀阀开度使高等级的内机膨胀阀开度值小于其最大开度值MaxVal-ij。This preferred embodiment provides a method for controlling the internal units of a multi-connected air-conditioning system. The method is to set levels for multiple internal units respectively, and the system controller controls the expansion valve opening of each internal unit to ensure high-level internal functions. It is preferentially in the working state where the expansion valve opening value is smaller than its maximum opening value MaxVal-ij. Wherein, by reducing the opening degree of the expansion valve of the low-level internal unit, the opening value of the expansion valve of the high-level internal unit is smaller than its maximum opening value MaxVal-ij.
如图1所示,该方法包括下述步骤:As shown in Figure 1, the method includes the following steps:
步骤1、为系统内每台内机设定编码ij,其中,i表征此台内机的等级为第i级,1≤i≤N,N为全部的内机等级数;j表征此台内机是第i级中的第j台内机,1≤j≤Mi,Mi为第i级拥有的内机数。Step 1. Set the code ij for each indoor unit in the system, where i indicates that the level of this indoor unit is the i-th level, 1≤i≤N, and N is the number of levels of all indoor units; j indicates that the level of this indoor unit The machine is the jth internal machine in the i-th level, 1≤j≤Mi, and Mi is the number of internal machines in the i-th level.
设定等级的依据包括房间的朝向、楼层、面积、保暖效果、是否为VIP用户房间等。无论空调工作在制冷还是制热模式下,这些环境因素会导致内机的负荷不同,而使用者的因素会导致对空调工作效果要求的高或低。所以可据此为内机设定等级。The basis for setting the level includes the orientation, floor, area, thermal effect of the room, whether it is a VIP user room, etc. Regardless of whether the air conditioner works in cooling or heating mode, these environmental factors will cause different loads on the internal unit, and user factors will lead to higher or lower requirements for the air conditioner's working effect. Therefore, the level can be set for the internal unit accordingly.
步骤2、为每台内机的膨胀阀设定最小开度值MinVal-ij、以及最大开度值MaxVal-ij;设置i的初始值为N,设置j的初始值为1。Step 2. Set the minimum opening value MinVal-ij and the maximum opening value MaxVal-ij for the expansion valve of each internal unit; set the initial value of i to N, and set the initial value of j to 1.
最小开度值MinVal-ij为一个固定值,例如200;最大开度值MaxVal-ij的初始值是一个固定值,例如480,但每台内机的最大开度值MaxVal-ij在后续的调整过程中可能会发生变化。系统中,每台内机的最小开度值MinVal-ij和/或最大开度值MaxVal-ij可以相同、也可以不同,根据实际使用情况而定。The minimum opening value MinVal-ij is a fixed value, such as 200; the initial value of the maximum opening value MaxVal-ij is a fixed value, such as 480, but the maximum opening value MaxVal-ij of each indoor unit will be adjusted later Processes are subject to change. In the system, the minimum opening value MinVal-ij and/or the maximum opening value MaxVal-ij of each indoor unit may be the same or different, depending on actual usage conditions.
步骤3、检测第ij台内机的膨胀阀开度值是否大于等于其最大开度值MaxVal-ij,大于等于则转至步骤4;小于则转至步骤5;Step 3. Detect whether the opening value of the expansion valve of the ij-th indoor unit is greater than or equal to its maximum opening value MaxVal-ij. If it is greater than or equal to, go to step 4; if it is smaller, go to step 5;
步骤4、降低第i-1级至第1级中每台内机的膨胀阀开度,转至步骤3。降低第i-1级至第1级中每台内机的膨胀阀开度的具体方法不限,优选方法为:将第i-1级至第1级中每台内机的膨胀阀开度值调整为当前值的K倍,其中,0<K<1。不同等级的内机所对应的K值可以相同也可以不同,优选的,内机的等级越低则对应的K值越小。Step 4. Decrease the expansion valve opening of each internal unit in the i-1st stage to the 1st stage, and go to step 3. There is no specific method for reducing the expansion valve opening of each internal unit from stage i-1 to stage 1. The preferred method is: reduce the expansion valve opening of each internal unit from stage i-1 to stage 1 The value is adjusted to K times the current value, where 0<K<1. The K values corresponding to different levels of internal units may be the same or different. Preferably, the lower the level of the internal units, the smaller the corresponding K value.
步骤5、判断步骤3中j是否等于Mi,不等于则j赋值为j+1并转至步骤3;等于则转至步骤6;Step 5. Judging whether j in step 3 is equal to Mi, if not equal, j is assigned a value of j+1 and goes to step 3; if it is equal, go to step 6;
步骤6、将第i-1级至第1级中每台内机当前的膨胀阀开度值记录分别为该内机新的最大开度值MaxVal;i赋值为i-1、j赋值为1,转至步骤7;Step 6. Record the current expansion valve opening value of each internal unit from level i-1 to level 1 as the new maximum opening value MaxVal of the internal unit; assign i to i-1 and j to 1 , go to step 7;
步骤7、判断i是否等于1,等于则转至步骤8;不等于则转至步骤3;Step 7, judge whether i is equal to 1, if it is equal, go to step 8; if it is not equal, go to step 3;
步骤8、程序结束。Step 8, the program ends.
为了实现上述内机控制方法,本优选实施例提供一种多联机空调系统,该空调系统包括外机、设置在外机上的系统控制器、以及至少两台内机;每台内机上设有膨胀阀。系统控制器用于检测和控制每台内机膨胀阀的开度值。根据各个内机的使用要求,通过内机控制器或外机控制板等接口依次设定每个内机的等级。通过通信机制,外机会获知每个内机的等级。In order to realize the control method of the above-mentioned indoor unit, this preferred embodiment provides a multi-connected air-conditioning system, the air-conditioning system includes an outdoor unit, a system controller arranged on the outer unit, and at least two inner units; each inner unit is provided with an expansion valve . The system controller is used to detect and control the opening value of the expansion valve of each internal unit. According to the use requirements of each indoor unit, the level of each indoor unit is sequentially set through the interface of the internal unit controller or the external unit control panel. Through the communication mechanism, the external machine can know the level of each internal machine.
下表所示为由10台内机组成的多联机空调系统的两次调整记录,工作模式是制热。The following table shows the two adjustment records of the multi-connected air conditioning system composed of 10 indoor units, and the working mode is heating.
在该多联机空调系统中,0#内机的等级为7级,是等级最高的内机;3#和8#内机的等级都是6级;6#和22#内机的等级都是5级;11#内机的等级为4级;10#内机的等级为3级;15#内机的等级为2级;18#和30#内机的等级都是1级。In this multi-connected air-conditioning system, the grade of 0# indoor unit is 7, which is the highest grade; 3# and 8# are both grade 6; the grades of 6# and 22# are both Class 5; 11# indoor unit is class 4; 10# indoor unit is class 3; 15# indoor unit is class 2; 18# and 30# indoor units are both class 1.
首先检测等级最高的0#内机。调整开始前其膨胀阀开度值为370,小于最大开度值MaxVal,说明空调效果能满足需求,无需调整,继续检测下一台内机。Detect the 0# indoor unit with the highest level first. Before the adjustment starts, the opening value of the expansion valve is 370, which is less than the maximum opening value MaxVal, indicating that the air conditioning effect can meet the demand, and there is no need to adjust, and continue to test the next indoor unit.
等级为7级的只有0#内机,所以接下来检测的将是6级的内机。3#和8#内机的等级都是6级,按照序号,先检测3#内机。调整开始前3#内机膨胀阀开度值为480,是最大开度值MaxVal的初始值,说明流进3#内机的冷媒已不能满足自身的空调效果需求,需要进行调整。There is only 0# indoor unit with level 7, so the next test will be level 6 indoor unit. The grades of 3# and 8# indoor units are both grade 6, according to the serial number, first check the 3# indoor unit. Before the adjustment, the opening value of the expansion valve of 3# internal unit was 480, which is the initial value of the maximum opening value MaxVal, indicating that the refrigerant flowing into the 3# internal unit can no longer meet the requirements of its own air conditioning effect, and needs to be adjusted.
系统控制器调整1至5级所有内机的膨胀阀开度值。其中,5级内机膨胀阀开度值变为当前值乘以系数K=0.99,4级内机膨胀阀开度值调整为当前值乘以系数K=0.98,3级内机膨胀阀开度值调整为当前值乘以系数K=0.97,2级内机膨胀阀开度值调整为当前值乘以系数K=0.96,1级内机膨胀阀开度值调整为当前值乘以系数K=0.95。上表中,“—”表示0#内机和同为6级的8#内机的膨胀阀开度值自动控制,不受系统控制器的调整、控制。另外,5级的22#内机膨胀阀开度值已经达到最小值,也不受系统控制器的调整。The system controller adjusts the opening value of the expansion valves of all internal units of stages 1 to 5. Among them, the opening value of the expansion valve of the 5-stage internal machine is changed to the current value multiplied by the coefficient K=0.99, the opening value of the expansion valve of the 4-stage internal machine is adjusted to the current value multiplied by the coefficient K=0.98, and the opening of the expansion valve of the 3-stage internal machine The value is adjusted to the current value multiplied by the coefficient K=0.97, the opening value of the expansion valve of the second-stage internal unit is adjusted to the current value multiplied by the coefficient K=0.96, and the opening value of the expansion valve of the first-stage internal unit is adjusted to the current value multiplied by the coefficient K= 0.95. In the above table, "—" indicates that the opening value of the expansion valve of the 0# internal unit and the 8# internal unit, both of which are 6 levels, is automatically controlled, and is not adjusted and controlled by the system controller. In addition, the opening value of the 22# internal unit expansion valve of stage 5 has reached the minimum value and is not subject to adjustment by the system controller.
每隔一段时间,外机重新判断6级的3#内机膨胀阀开度值是否小于最大开度值MaxVal。如果仍是最大开度值MaxVal,则进行下一次调节,直到3#内机膨胀阀开度值小于最大开度值MaxVal为止。假如第三次调整后3#内机膨胀阀开度值为478,小于其最大开度值480,表明3#内机空调效果已调整完毕。Every once in a while, the external unit re-judges whether the opening value of the 3# internal unit expansion valve at level 6 is less than the maximum opening value MaxVal. If it is still the maximum opening value MaxVal, perform the next adjustment until the opening value of the 3# internal unit expansion valve is less than the maximum opening value MaxVal. If the opening value of the expansion valve of 3# internal unit is 478 after the third adjustment, which is smaller than its maximum opening value of 480, it means that the air conditioning effect of 3# internal unit has been adjusted.
此时8#内机膨胀阀开度值为320,小于最大开度值MaxVal,说明空调效果能满足需求,无需调整,继续检测下一台内机。At this time, the opening value of the expansion valve of the 8# internal unit is 320, which is less than the maximum opening value MaxVal, indicating that the air conditioning effect can meet the demand, no adjustment is required, and the next internal unit is tested.
6级的所有内机都已经满足要求,进入第5级内机的调整。6#和22#内机的等级都是5级,根据序号优选检测6#内机。All the internal units of level 6 have met the requirements, and the adjustment of the internal units of level 5 is entered. The grades of 6# and 22# indoor units are both grade 5, and the 6# indoor unit is preferably detected according to the serial number.
6#内机当前开度为311,该值为3#内机调整后形成的新的最大开度值MaxVal,所以6#内机当前工作在最大开度值MaxVal,需要调整1至4级的所有内机。6#内机的膨胀阀自动调节,但不能超过新的最大开度值MaxVal,即311。The current opening of the 6# indoor unit is 311, which is the new maximum opening value MaxVal formed after the adjustment of the 3# indoor unit, so the 6# indoor unit is currently working at the maximum opening value MaxVal, and the level 1 to 4 needs to be adjusted All internal units. The expansion valve of the 6# internal unit is automatically adjusted, but it cannot exceed the new maximum opening value MaxVal, which is 311.
1至4级每个级别设定不同的系数K,如4级的系数K=0.99,3级的系数K=0.98,2级的系数K=0.97,1级的系数K=0.96。每隔一段时间,外机重新判断6#内机膨胀阀开度值是否小于311。Each level from 1 to 4 sets a different coefficient K, such as the coefficient K=0.99 for level 4, the coefficient K=0.98 for level 3, the coefficient K=0.97 for level 2, and the coefficient K=0.96 for level 1. Every once in a while, the external unit re-judges whether the expansion valve opening value of the 6# internal unit is less than 311.
如果仍是最大开度值则进行下一次调整直到6#内机膨胀阀开度值小于最大开度值为止。假设第三次调节后6#内机膨胀阀开度值为308,小于其最大开度值311,表明6#内机已调节到位,继续检测下一台内机。If it is still the maximum opening value, carry out the next adjustment until the expansion valve opening value of 6# internal unit is less than the maximum opening value. Assume that after the third adjustment, the expansion valve opening value of 6# internal unit is 308, which is smaller than its maximum opening value of 311, indicating that the 6# internal unit has been adjusted in place, and continue to detect the next internal unit.
22#内机工作在最小开度值MinVal,说明足以满足空调的需求,无需调整,继续检测下一台内机。The 22# indoor unit works at the minimum opening value MinVal, which means it is sufficient to meet the needs of the air conditioner, no adjustment is required, and the next indoor unit will be tested.
接下来是4级内机的调整,重复上述调整内容。调整结束后以此类推直到最低级内机为止。Next is the adjustment of the 4-level internal unit, repeat the above adjustment content. After the adjustment is completed, it can be deduced by analogy until the lowest level internal unit.
当内机的膨胀阀开度值为最小开度值时则不进行调整。当系统重新开机或重启后,则系统控制器重新按照等级由高至低的顺序依次检测每台内机的膨胀阀是否工作在最大开度值。When the expansion valve opening of the internal unit is the minimum opening value, no adjustment will be made. When the system is restarted or restarted, the system controller will check whether the expansion valve of each internal unit is working at the maximum opening value in sequence from high to low.
优选实施例二:Preferred embodiment two:
本优选实施例提供一种多联机空调系统内机控制方法和用于实现该内机控制方法的多联机空调系统,控制方法的内容以及空调系统的结构与优选实施例一基本相同。该控制方法是分别为多台内机设定等级,系统控制器分别控制每台内机的膨胀阀开度以保证等级高的内机能优先处于膨胀阀开度值小于其最大开度值MaxVal-ij的工作状态。该空调系统包括外机、系统控制器、以及至少两台内机;每台内机上设有膨胀阀。系统控制器用于检测和控制每台内机膨胀阀的开度值。This preferred embodiment provides a method for controlling internal units of a multi-connected air-conditioning system and a multi-connected air-conditioning system for realizing the method. The content of the control method and the structure of the air-conditioning system are basically the same as those in the first preferred embodiment. The control method is to set the levels for multiple internal units separately, and the system controller controls the expansion valve opening of each internal unit separately to ensure that the internal units with higher levels are given priority when the expansion valve opening value is less than its maximum opening value MaxVal- The working status of ij. The air conditioning system includes an outdoor unit, a system controller, and at least two inner units; each inner unit is provided with an expansion valve. The system controller is used to detect and control the opening value of the expansion valve of each internal unit.
不同之处在于:控制方法的具体步骤不限,能够实现该方法即可;在调整低等级内机的膨胀阀的最大开度值MaxVal,系数K可以相同也可以根据等级的不同而不同。The difference is: the specific steps of the control method are not limited, as long as the method can be realized; when adjusting the maximum opening value MaxVal of the expansion valve of the low-grade internal unit, the coefficient K can be the same or different according to the grade.
系统控制器可以设置在外机上,也可以设置在其它位置处,能够及时准确地为内机设定等级、检测内机当前的膨胀阀开度值、以及调整低等级内机即可。The system controller can be set on the external unit or at other locations. It can timely and accurately set the level for the internal unit, detect the current expansion valve opening value of the internal unit, and adjust the low-level internal unit.
调整过程中,可以在某一级中所有内机都调整完毕后再将等级低于这一级的内机的膨胀阀当前开度值设定为新的最大开度值;也可以在每一次调整后都将被调整的每台内机的膨胀阀当前开度值设定为新的最大开度值。During the adjustment process, the current opening value of the expansion valve of the internal unit whose level is lower than this level can be set as the new maximum opening value after all the internal units in a certain level have been adjusted; After the adjustment, the current opening value of the expansion valve of each internal unit to be adjusted is set as the new maximum opening value.
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