WO2019104966A1 - 多联式空调系统的噪音控制方法及控制器 - Google Patents
多联式空调系统的噪音控制方法及控制器 Download PDFInfo
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- WO2019104966A1 WO2019104966A1 PCT/CN2018/088274 CN2018088274W WO2019104966A1 WO 2019104966 A1 WO2019104966 A1 WO 2019104966A1 CN 2018088274 W CN2018088274 W CN 2018088274W WO 2019104966 A1 WO2019104966 A1 WO 2019104966A1
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- opening degree
- expansion valve
- indoor unit
- coil temperature
- control method
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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- the invention relates to the technical field of air conditioners, and in particular to a noise control method and a controller for a multi-connected air conditioning system.
- the multi-connected air conditioning system has gradually become the preferred solution for air conditioning in office buildings, shopping malls, apartments and other collective places due to its advantages of convenient installation, small impact on the appearance of the building, and remarkable refrigeration/heating effects.
- the electronic expansion valve of the heating indoor unit that normally does not start will retain a certain degree of opening (ie, retaining opening) to allow the refrigerant to participate in the circulation of the system.
- the use of large-caliber electronic expansion valves increases the cost of the whole machine to a certain extent.
- the cost of multi-connected air-conditioning systems will be greatly increased by replacing electronic expansion valves of multiple indoor units at the same time. That is to say, the existing technical solution for replacing the large-caliber electronic expansion valve to solve the problem of noise generated during standby of the heating indoor unit has the problems of low control precision and high cost.
- the present invention provides a A noise control method for a multi-connected air conditioning system, the multi-connected air conditioning system includes an outdoor unit and a plurality of indoor units, each of the indoor units being provided with an expansion valve, wherein the noise control method includes the following step:
- the opening degree of the expansion valve corresponding to each indoor unit in the standby state is adjusted based on the target parameter.
- the target parameter is a target coil temperature of the indoor unit coil.
- the step of "adjusting the opening degree of the expansion valve corresponding to each indoor unit in the standby state based on the target parameter" further includes:
- the opening degree of the expansion valve corresponding to each indoor unit in the standby state is adjusted based on the target coil temperature and each of the actual coil temperatures.
- the opening degree of the expansion valve corresponding to each indoor unit in the standby state based on the target coil temperature and each of the actual coil temperatures further include:
- the opening degree of the expansion valve of the indoor unit corresponding to the actual coil temperature is decreased by the first set opening degree.
- the step of "adjusting the opening degree of the expansion valve corresponding to each indoor unit in the standby state based on the target parameter" is every first setting. Time is executed once.
- the noise control method further includes:
- the noise control method further includes:
- the present invention also provides a controller of a multi-connected air conditioning system, the controller being capable of performing the noise control method according to any one of the above aspects.
- the noise control method of the multi-connected air conditioning system includes: obtaining the operation of the heating mode when the operation mode of the multi-connected air conditioning system is the heating mode Time; when the running time is greater than the time threshold, controlling the opening degree of the expansion valve corresponding to all the indoor units in the standby state to be adjusted to the reference opening degree; and based on the target parameter, the expansion valve corresponding to each indoor unit in the standby state The opening is adjusted.
- the opening degree of the expansion valve corresponding to the indoor unit that controls the standby state is first adjusted to the reference opening degree, and then the opening degree of the expansion valve corresponding to each indoor unit in the standby state is based on the target parameter.
- the control method for adjusting, the noise control method of the present invention can perform noise control for each standby indoor unit, and improve control precision and noise control effect.
- the outdoor coil temperature and the actual coil temperature of each indoor unit coil are obtained, and the target coil temperature of the indoor unit coil is determined based on the outdoor ambient temperature, and then based on the actual coil temperature and the target coil temperature. Comparing the manner in which the opening degree of the expansion valve corresponding to each indoor unit is adjusted, the present invention can control the opening of the expansion valve of the indoor unit corresponding to the actual coil temperature when the actual coil temperature is lower than the target coil temperature.
- the first opening degree is increased by the degree; or when the actual coil temperature is greater than the target coil temperature, the opening degree of the expansion valve of the indoor unit corresponding to the actual coil temperature is decreased by the first set opening degree.
- the principle of the above control method for reducing noise is that when the actual coil temperature is lower than the target coil temperature, it is proved that the amount of refrigerant accumulated in the indoor unit coil is excessive, and at this time, the flow rate of the refrigerant is increased by increasing the opening degree of the expansion valve.
- the opening degree of the expansion valve reducing or eliminating the noise generated by the refrigerant flow in the indoor unit; when the actual coil temperature is lower than the target coil temperature, it is proved that the amount of refrigerant in the indoor unit coil is small, and at this time, The original opening is prone to noise.
- the present invention also saves the overall machine cost because the method of the present invention does not require changes to the original structure of the air conditioning system during the control process.
- FIG. 1 is a schematic flow chart of a noise control method of a multi-connected air conditioning system according to the present invention
- FIG. 2 is a schematic flow chart of a method for adjusting an opening degree of an expansion valve corresponding to each indoor unit in a standby state based on a target parameter according to the present invention.
- the multi-connected air conditioning system includes an outdoor unit and a plurality of indoor units connected in series or in parallel with the outdoor unit, and the outdoor unit is provided with an outdoor unit heat exchanger and a compressor.
- Outdoor unit electronic expansion valve and control chip and other components, indoor unit heat exchanger, indoor unit electronic expansion valve and other components, the connection between the above components, the refrigeration system and heating principle of the air conditioning system have been Known, it will not be described in detail here.
- the noise control method can adjust the opening degree of the electronic expansion valve (hereinafter referred to as an expansion valve) corresponding to the indoor unit in the standby state to the reference opening degree, and then each indoor in the standby state based on the target parameter.
- the control method of adjusting the opening degree of the expansion valve corresponding to the machine enables the air conditioning system to perform noise control for each indoor unit in the standby state, thereby effectively keeping the room in which each indoor unit in the standby state is located quiet. Improve the control accuracy of noise.
- FIG. 1 is a schematic flow chart of a noise control method of a multi-connected air conditioning system according to the present invention.
- the noise control method of the multi-connected air conditioning system of the present invention mainly comprises the following steps:
- the operation mode of the multi-connected air conditioning system is the heating mode
- the running time of the heating mode is obtained; for example, the operating mode of the multi-connected air conditioning system includes a cooling mode, a heating mode, a blowing mode, and a dehumidification mode, and more
- the integrated air conditioning system obtains the current operation mode through the control chip of the outdoor unit, and the control chip acquires the running time of the air conditioner in the heating mode through the timer inside the air conditioner.
- the time threshold may also be 3 min, 5 min, or 15 min, etc., as long as the multi-connected air conditioning system is operated after the time, the heating operation should be stabilized; for example, the reference opening degree may be any value near the retained opening degree. .
- S300 adjusting an opening degree of an expansion valve corresponding to each indoor unit in a standby state based on a target parameter; for example, acquiring a coil temperature of each indoor unit coil, and determining a coil temperature of each indoor unit It is determined that the opening degree of the expansion valve corresponding to the indoor unit is adjusted to accurately control the noise of each indoor unit.
- the expansion valve corresponding to the indoor unit in the standby state is first adjusted to the reference opening degree, and then the expansion valve corresponding to each indoor unit is separately adjusted based on the target parameter.
- the noise control method of the present invention can separately control the noise of the room where each indoor unit is located, improve the noise control precision and the noise control effect, keep the room where each indoor unit in the standby state is located quiet, and improve the user experience.
- FIG. 2 is a schematic flow chart of a method for adjusting an opening degree of an expansion valve corresponding to each indoor unit in a standby state based on a target parameter according to the present invention.
- step S300 further includes:
- S320 Determine a target coil temperature of the indoor unit coil based on a correspondence between an outdoor ambient temperature and a target coil temperature.
- the target coil temperature may be obtained based on experimental data, and the target coil temperature is obtained.
- the inventors of the present invention derived a comparison table of outdoor ambient temperature and target coil temperature based on a large number of experiments, that is, Table 1:
- the adjusting manner may further include:
- the opening degree of the expansion valve of the indoor unit corresponding to the actual coil temperature is increased by the first set opening degree.
- the first set opening degree may be 2P.
- the opening degree of the expansion valve corresponding to the indoor unit is at the reserved opening degree 24P.
- the opening degree of the control expansion valve is increased by 2P on the basis of 24P, reaching 26P, and the flow rate of the refrigerant can be adapted to the opening degree of the expansion valve to ensure the return of the refrigerant. Reduce the noise generated by the indoor unit.
- the opening degree of the expansion valve of the indoor unit corresponding to the actual coil temperature is decreased by the first set opening degree.
- the opening degree of the expansion valve corresponding to the indoor unit is at the retained opening degree 24P.
- the opening degree of the control expansion valve is reduced by 2P on the basis of 24P, reaching 22P, and the flow rate of the refrigerant can be compared with the opening degree of the expansion valve. Adapt to reduce the noise generated when the refrigerant flows through the expansion valve.
- the step of "adjusting the opening degree of the expansion valve corresponding to each indoor unit in the standby state based on the target parameter" is performed every first set time. For example, every 1 minute. Of course, it can also be performed every 2 minutes, 3 minutes, or 5 minutes. The shorter the time of the isolation is set, the more the control precision of the control method can be improved.
- the minimum setting opening degree and the maximum setting opening degree of the adjustment range of the expansion valve may be set to further improve the control precision. If the minimum setting opening degree can be 16P, to avoid the problem of refrigerant accumulation when the opening degree of the expansion valve is less than 16P; the maximum setting opening degree can be 75P, so as to avoid the indoor unit when the expansion valve opening degree is greater than 75P The problem of noise again.
- the values of the minimum set opening and the maximum set opening are only a specific setting manner, and those skilled in the art can adjust the value to adapt the present invention without departing from the principle of the present invention. More specific application scenarios.
- the noise control method of the present invention may further set the following steps:
- the control chip of the outdoor unit controls the expansion valve of the indoor unit to be turned on at the first target opening time for the second set time, and after the second set time is continued
- the state of the indoor unit is switched to the standby state.
- the control chip of the outdoor unit forces the expansion valve corresponding to the indoor unit to maintain the opening degree of 350P in 1 minute, so that the refrigerant in the indoor unit is at 1 min.
- the backflow is sufficiently backed up to avoid the problem of accumulation of refrigerant due to the closing of the expansion valve immediately when the indoor unit enters the standby state.
- the control chip controls the state of the outdoor unit to switch to the standby state, and the outdoor unit participates in the determination of the noise control method.
- the expansion valve corresponding to all the standby indoor units is controlled simultaneously
- the second target opening is turned on during the fourth set time. For example, when the compressor exhaust temperature of the outdoor unit reaches or exceeds 100 ° C, or the opening degree of the expansion valve corresponding to the outdoor unit reaches or exceeds 400 P for 1 min, it proves that the amount of refrigerant in the outdoor unit is missing.
- the expansion valve corresponding to the standby indoor unit is simultaneously turned on to 88P, so that the accumulated refrigerant in the indoor unit pipelines can be recirculated in time to avoid the shortage of refrigerant and improve the safety of the air conditioning system.
- the present invention also provides a controller for a multi-connected air conditioning system that is capable of performing the aforementioned noise control method.
- a controller may be physically located in one of the outdoor units (such as the aforementioned control chip), or may be one for each indoor unit, may be a controller dedicated to performing the method of the present invention, or may be a general purpose A functional module or functional unit of the controller.
- the present invention can adjust the opening degree of the corresponding expansion valve for each target parameter of the indoor unit in the standby state during the standby of the heating indoor unit, so that all the indoor units correspond to
- the opening of the expansion valve is adapted to the flow rate of the refrigerant, which greatly reduces or even eliminates the noise generated by the flow of the refrigerant in the indoor units.
- the adjustment process of the present invention does not require changes to the original structure of the air conditioning system, thereby saving the overall machine cost.
- the above-mentioned control method solves the problem that the prior art adopts the technical solution of replacing the large-diameter electronic expansion valve to solve the standby noise of the heating indoor unit, and has the problems of low control precision and high cost, and improves the user experience.
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Abstract
本发明涉及空调技术领域，具体涉及一种多联式空调系统的噪音控制方法及控制器。本发明旨在解决现有的采用更换大口径电子膨胀阀来解决制热室内机待机噪音的技术方案存在的控制精度低的问题。噪音控制方法包括如下步骤：在多联式空调系统的运行模式为制热模式时，获取制热模式的运行时间；在运行时间大于时间阈值时，控制所有处于待机状态的室内机所对应的膨胀阀的开度调整到基准开度；基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整。通过上述控制方法，本发明能够针对每个室内机的膨胀阀分别进行调整，提高了噪音控制的精度。
Description
本发明涉及空调技术领域，具体涉及一种多联式空调系统的噪音控制方法及控制器。
近年来，多联式空调系统以其安装便捷、对建筑物外观影响小、制冷/制热效果显著等优点，逐渐成为写字楼、商场、公寓等集体场所进行空气调节的首选解决方案。多联机空调系统在以制热模式运行时，为了避免冷媒的积攒，通常不开机的制热室内机的电子膨胀阀会保留一定的开度(即保留开度)以使冷媒参与系统的循环。但是在冷媒流动时，由于制热室内机的风扇不运转，因此冷媒的流动声音会被放大，进而形成噪音，尤其是在卧室等需要安静的房间，影响用户休息，带来非常不好的使用体验。
为了解决上述制热室内机待机时的噪音问题，现有技术中多采用较大口径的电子膨胀阀替代原空调室内机中较小口径的膨胀阀的方案加以解决。这种方案通过加大膨胀阀口径、改变膨胀阀流道的方式，使得冷媒的流速降低，进而降低冷媒的流动产生的噪音。虽然这种方式一定程度上解决了冷媒流动产生的噪音问题，但是也不可避免地存在一定的缺陷。首先，通过加大电子膨胀阀口径、改变流道的方式，在实际应用时，由于膨胀阀仍然保留固定的开度，因此一些室内机仍然存在一定的噪音。其次，采用大口径电子膨胀阀一定程度上增加了整机的成本，对于多联式空调系统来说，同时更换多台室内机的电子膨胀阀，多联式空调系统的成本会大大增加。也就是说，现有的采用更换大口径电子膨胀阀解决制热室内机待机时产生噪音问题的技术方案存在控制精度低、成本高的问题。
相应地，本领域需要一种新的多联式空调系统的噪音控制方法来解决上述问题。
发明内容
为了解决现有技术中的上述问题，即为了解决现有的采用更换大口径电子膨胀阀来解决制热室内机待机噪音的技术方案存在的控制精度低、成本高的问题，本发明提供了一种多联式空调系统的噪音控制方法，所述多联式空调系统包括室外机和多个室内机，每个所述室内机都设置有膨胀阀，其特征在于，所述噪音控制方法包括如下步骤：
在所述多联式空调系统的运行模式为制热模式时，获取所述制热模式的运行时间；
在所述运行时间大于时间阈值时，控制所有处于待机状态的室内机所对应的膨胀阀的开度调整到基准开度；
基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整。
在上述多联式空调系统的噪音控制方法的优选技术方案中，所述目标参数为室内机盘管的目标盘管温度。
在上述多联式空调系统的噪音控制方法的优选技术方案中，“基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整”的步骤进一步包括：
获取室外环境温度与每个室内机盘管的实际盘管温度；
基于所述室外环境温度与目标盘管温度的对应关系，确定室内机盘管的目标盘管温度；
基于目标盘管温度和每个所述实际盘管温度，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整。
在上述多联式空调系统的噪音控制方法的优选技术方案中，“基于目标盘管温度与每个所述实际盘管温度，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整”的步骤进一步包括：
在所述实际盘管温度小于所述目标盘管温度时，控制所述实际盘管温度所对应的室内机的膨胀阀的开度增大第一设定开度；或者
在所述实际盘管温度大于所述目标盘管温度时，控制所述实际盘管温度所对应的室内机的膨胀阀的开度减小第一设定开度。
在上述多联式空调系统的噪音控制方法的优选技术方案中，“基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整”的步骤每隔第一设定时间执行一次。
在上述多联式空调系统的噪音控制方法的优选技术方案中，“在所述实际盘管温度小于所述目标盘管温度时，控制所述实际盘管温度所对应的室内机的膨胀阀的开度增大第一设定开度”的步骤之后，所述噪音控制方法还包括：
在膨胀阀的开度减小至最小设定阈值时，停止减小所述膨胀阀的开度。
在上述多联式空调系统的噪音控制方法的优选技术方案中，“在所述实际盘管温度大于所述目标盘管温度时，控制所述实际盘管温度所对应的室内机的膨胀阀的开度减小第一设定开度”的步骤之后，所述噪音控制方法还包括：
在膨胀阀的开度增大至最大设定阈值时，停止增大所述膨胀阀的开度。
本发明还提供了一种多联式空调系统的控制器，所述控制器能够执行上述方案中任一项所述的噪音控制方法。
本领域技术人员能够理解的是，在本发明的优选技术方案中，多联式空调系统的噪音控制方法包括：在多联式空调系统的运行模式为制热模式时，获取制热模式的运行时间；在运行时间大于时间阈值时，控制所有处于待机状态的室内机所对应的膨胀阀的开度调整到基准开度；基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整。通过在制热模式下，控制处于待机状态的室内机所对应的膨胀阀的开度先调整到基准开度，然后基于目标参数对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整的控制方式，本发明的噪音控制方法可以针对每一个待机室内机进行噪音控制，提高控制的精准度和噪音控制效果。
具体而言，通过获取室外环境温度和每个室内机盘管的实际盘管温度，并基于室外环境温度确定室内机盘管的目标盘管温度，然后基于实际盘管温度和目标盘管温度的比较，对每个室内机所对应的膨胀阀的开度进行调整的方式，本发明能够在实际盘管温度小于目标盘管温度时，控制实际盘管温度所对应的室内机的膨胀阀的开度增大第一设定开度；或者在实际盘管温度大于目标盘管温度时，控制实际盘管温度所对应的室内机的膨胀阀的开度减小第一设定开度。上述控制方式减小噪音的原理在于：在实际盘管温度小于目标盘管温度时，证明该室内机盘 管中堆积的冷媒量过多，此时通过增大膨胀阀开度，使冷媒的流量与膨胀阀的开度相适应，减小或消除室内机中冷媒流动产生的噪音；在实际盘管温度小于目标盘管温度时，证明该室内机盘管中的冷媒量较少，此时保持原有开度容易产生噪音，因此通过减小膨胀阀开度的方式，使冷媒的流量与膨胀阀的开度相适应，减小或消除室内机中冷媒流动产生的噪音。也就是说，通过上述控制方法，解决了现有技术中采用更换大口径电子膨胀阀来解决制热室内机待机噪音的技术方案存在的控制精度低、成本高的问题，改善了用户体验。此外，由于本发明方法在控制过程中无需对空调系统的原有结构做出改动，因此本发明还节约了整机成本。
下面参照附图来描述本发明的多联式空调系统的噪音控制方法及控制器。附图中：
图1为本发明的多联式空调系统的噪音控制方法的流程示意图；
图2为本发明的基于目标参数对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整的方法流程示意图。
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。
首先需要说明的是，对于本领域普通技术人员而言，多联式空调系统包括室外机以及与室外机串联或并联的多个室内机，室外机中设置有室外机换热器、压缩机、室外机电子膨胀阀以及控制芯片等部件，室内机中设置有室内机换热器、室内机电子膨胀阀等部件，上述部件之间的连接关系、空调系统的制冷和制热原理等都是已知的，在此不进行详细描述。
为解决现有技术中采用更换大口径电子膨胀阀来解决制热室内机待机噪音的技术方案存在的控制精度低、整机成本高的问题，本发明提供了一种多联式空调系统的噪音控制方法，该噪音控制方法能够 通过先控制处于待机状态的室内机所对应的电子膨胀阀(以下简称膨胀阀)的开度调整到基准开度，然后基于目标参数对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整的控制方式，使空调系统针对每个处于待机状态的室内机分别进行噪音控制，有效地使每一个处于待机状态的室内机所处的房间保持安静，提高了噪音的控制精度。
首先参照图1，图1为本发明的多联式空调系统的噪音控制方法的流程示意图。如图1所示，本发明的多联式空调系统的噪音控制方法主要包括如下步骤：
S100、在多联式空调系统的运行模式为制热模式时，获取制热模式的运行时间；如多联式空调系统的运行模式包括制冷模式、制热模式、送风模式以及除湿模式，多联式空调系统通过室外机的控制芯片获取当前的运行模式，并且控制芯片通过空调内部的计时器获取空调在制热模式的运行时间。
S200、在运行时间大于时间阈值时，控制所有处于待机状态的室内机所对应的膨胀阀的开度调整到基准开度；例如，时间阈值为10min，基准开度为现有技术中膨胀阀的保留开度(如保留开度为24P，其中P为开度脉冲单位，下同)，在制热模式的运行时间大于10min时，此时空调制热运行已达到稳定状态，然后控制处于待机状态的室内机所对应的膨胀阀的开度调整到该膨胀阀的保留开度；当然，时间阈值和基准开度的设置并非一成不变，本领域技术人员还能够对其调整。如时间阈值还可以是3min、5min、或15min等，只要多联式空调系统经过该时间的运行后，制热运行应达到稳定即可；如基准开度还可以是保留开度附近的任意值。
S300、基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整；例如，获取每个室内机盘管的盘管温度，并针对每个室内机的盘管温度确定对室内机所对应的膨胀阀的开度进行调整，以便精确控制每个室内机的噪音。
上述描述可以看出，在制热模式下，通过控制处于待机状态的室内机所对应的膨胀阀先调整到基准开度，然后基于目标参数对每个室内机所对应的膨胀阀分别进行调整，本发明的噪音控制方法可以针对每个室内机所在房间的噪音进行单独控制，提高噪音的控制精度和噪音 控制效果，使每个处于待机状态的室内机所处的房间保持安静，提高用户体验。
参照图2，图2为本发明的基于目标参数对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整的方法流程示意图。
如图2所示，在一种可能的实施方式中，步骤S300进一步包括：
S310、获取室外环境温度与每个室内机盘管的实际盘管温度；如通过在室外机和室内机的盘管上分别设置温度传感器的方式获取室外环境温度和实际盘管温度。
S320、基于室外环境温度与目标盘管温度的对应关系，确定室内机盘管的目标盘管温度；在一种可能的实施方式中，目标盘管温度可以基于实验数据得到，该目标盘管温度代表在某一室外环境温度范围内，为使处于待机状态的室内机不产生噪音而将膨胀阀的开度调节至最佳开度时，所对应的该室内机盘管的温度。例如，本发明的发明人基于大量实验得出室外环境温度与目标盘管温度的对照表，即表1：
表1
| 室外环境温度(℃) | 目标盘管温度(℃) |
| (-∞,-10] | 36 |
| (-10,10] | 38 |
| (10,+∞) | 40 |
S330、基于目标盘管温度和每个实际盘管温度，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整。
在一种可能的实施方式中，调整方式可以进一步包括：
i)在实际盘管温度小于目标盘管温度时，控制实际盘管温度所对应的室内机的膨胀阀的开度增大第一设定开度。优选地，第一设定开度可以为2P。例如，室内机所对应的膨胀阀的开度处于保留开度24P，此时若获取到室外环境温度为0℃(所对应的目标盘管温度为38℃)、实际盘管温度为30℃，则证明盘管内的冷媒堆积过多，此时控制膨胀阀的开度在24P的基础上增加2P，达到26P，可以使冷媒的流量与膨胀阀的开度相适应，保证冷媒回流的基础上，降低室内机产生的噪音。
ii)在实际盘管温度大于目标盘管温度时，控制实际盘管温度所对应的室内机的膨胀阀的开度减小第一设定开度。例如，室内机所对应的膨胀阀的开度处于保留开度24P，此时若获取到室外环境温度为0℃(所对应的目标盘管温度为38℃)、实际盘管温度为42℃，则证明盘管内的冷媒较少，保持原有开度容易产生噪音，此时控制膨胀阀的开度在24P的基础上减小2P，达到22P，可以使冷媒的流量与膨胀阀的开度相适应，降低冷媒流过膨胀阀时产生的噪音。
进一步优选地，上述“基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整”步骤每隔第一设定时间进行一次。如每隔1分钟进行一次。当然，也可以每2min、3min或5min进行一次，该隔离的时间设置的越短越能够提高本控制方法的控制精度。
进一步优选地，还可以对膨胀阀的调整范围设置最小设定开度和最大设定开度，以进一步提高控制精度。如最小设定开度可以为16P，以避免膨胀阀的开度小于16P时可能造成冷媒堆积的问题；最大设定开度可以为75P，以避免当膨胀阀开度大于75P时可能使室内机再次产生噪音的问题。当然，上述最小设定开度和最大设定开度的数值只是一种具体的设置方式，在不偏离本发明原理的条件下，本领域技术人员可以对该数值进行调整，以便使本发明适应更加具体的应用场景。
此外，为了增加多联式空调系统的安全性，防止在使用本控制方法时空调系统出现冷媒缺失的情况，在一种可能的实施方式中，本发明的噪音控制方法还可以设置如下步骤：
当任一室内机由运行状态切换为待机状态时，室外机的控制芯片控制该室内机的膨胀阀在第二设定时间内以第一目标开度开启，并在持续第二设定时间后，将该室内机的状态切换为待机状态。例如，在某一室内机由制热运行切换为待机状态时，室外机的控制芯片强制该室内机所对应的膨胀阀在1min内保持350P的开度，以使该室内机中的冷媒在1min时间内充分回流，避免该室内机在进入待机状态时立即关闭膨胀阀而导致的冷媒堆积的问题。1min后，控制芯片控制该室外机的状态切换为待机状态，使该室外机参与前述噪音控制方法的判定。
当室外机的压缩机排气温度不小于阈值温度、或者室外机所对应的膨胀阀的开度不小于阈值开度并持续第三设定时间时，控制所有待机室内机所对应的膨胀阀同时在第四设定时间内以第二目标开度开 启。例如，当室外机的压缩机排气温度达到或超过100℃，或者室外机所对应的膨胀阀的开度达到或超过400P并持续1min时，证明室外机的冷媒量出现缺失，此时将所有待机室内机所对应的膨胀阀同时开启到88P，以便让这些室内机管路中积攒的冷媒及时回流，避免冷媒缺失的情况出现，提高空调系统的安全性。
当然，上述两种控制方法中的具体参数仅仅是作为示例呈现，本领域技术人员可以根据实际的应用场景对其做出灵活调整，以提高空调系统的安全性能。
本发明还提供了一种多联式空调系统的控制器，该控制器能够执行前述的噪音控制方法。这种控制器物理上可以是设置于室外机的一个(如前述的控制芯片)，也可以针对每个室内机有一个，可以是专门用于执行本发明的方法的控制器，也可以是通用控制器的一个功能模块或功能单元。
综上所述，采用上述噪音控制方法，本发明能够在制热室内机待机时，针对每个处于待机状态的室内机的目标参数调节所对应膨胀阀的开度，使所有室内机所对应的膨胀阀开度与冷媒的流量相适应，大大减小甚至消除冷媒在这些室内机内流动产生的噪音。而且本发明的调节过程无需对空调系统的原有结构做出改动，节约了整机成本。也就是说，通过上述控制方法，解决了现有技术中采用更换大口径电子膨胀阀来解决制热室内机待机噪音的技术方案存在的控制精度低、成本高的问题，改善了用户体验。
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作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。
Claims (8)
- 一种多联式空调系统的噪音控制方法，所述多联式空调系统包括室外机和多个室内机，每个所述室内机都设置有膨胀阀，其特征在于，所述噪音控制方法包括如下步骤：在所述多联式空调系统的运行模式为制热模式时，获取所述制热模式的运行时间；在所述运行时间大于时间阈值时，控制所有处于待机状态的室内机所对应的膨胀阀的开度调整到基准开度；基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整。
- 根据权利要求1所述的多联式空调系统的噪音控制方法，其特征在于，所述目标参数为室内机盘管的目标盘管温度。
- 根据权利要求2所述的多联式空调系统的噪音控制方法，其特征在于，“基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整”的步骤进一步包括：获取室外环境温度与每个室内机盘管的实际盘管温度；基于所述室外环境温度与目标盘管温度的对应关系，确定室内机盘管的目标盘管温度；基于目标盘管温度和每个所述实际盘管温度，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整。
- 根据权利要求3所述的多联式空调系统的噪音控制方法，其特征在于，“基于目标盘管温度与每个所述实际盘管温度，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整”的步骤进一步包括：在所述实际盘管温度小于所述目标盘管温度时，控制所述实际盘管温度所对应的室内机的膨胀阀的开度增大第一设定开度；或者在所述实际盘管温度大于所述目标盘管温度时，控制所述实际盘管温度所对应的室内机的膨胀阀的开度减小第一设定开度。
- 根据权利要求4所述的多联式空调系统的噪音控制方法，其特征在于，“基于目标参数，对每个处于待机状态的室内机所对应的膨胀阀的开度进行调整”的步骤每隔第一设定时间执行一次。
- 根据权利要求4所述的多联式空调系统的噪音控制方法，其特征在于，“在所述实际盘管温度小于所述目标盘管温度时，控制所述实际盘管温度所对应的室内机的膨胀阀的开度增大第一设定开度”的步骤之后，所述噪音控制方法还包括：在膨胀阀的开度减小至最小设定阈值时，停止减小所述膨胀阀的开度。
- 根据权利要求4所述的多联式空调系统的噪音控制方法，其特征在于，“在所述实际盘管温度大于所述目标盘管温度时，控制所述实际盘管温度所对应的室内机的膨胀阀的开度减小第一设定开度”的步骤之后，所述噪音控制方法还包括：在膨胀阀的开度增大至最大设定阈值时，停止增大所述膨胀阀的开度。
- 一种多联式空调系统的控制器，其特征在于，所述控制器能够执行权利要求1至7中任一项所述的噪音控制方法。
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| CN2503393Y (zh) * | 2001-10-31 | 2002-07-31 | 上海日立电器有限公司 | 制冷剂流量智能分配器 |
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