WO2020233116A1 - Air conditioner defrosting control method - Google Patents

Air conditioner defrosting control method Download PDF

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WO2020233116A1
WO2020233116A1 PCT/CN2019/128060 CN2019128060W WO2020233116A1 WO 2020233116 A1 WO2020233116 A1 WO 2020233116A1 CN 2019128060 W CN2019128060 W CN 2019128060W WO 2020233116 A1 WO2020233116 A1 WO 2020233116A1
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coils
group
coil
temperature
control method
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PCT/CN2019/128060
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French (fr)
Chinese (zh)
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李小波
孙健
王建营
安超
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青岛海尔空调电子有限公司
海尔智家股份有限公司
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Publication of WO2020233116A1 publication Critical patent/WO2020233116A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031Sensor arrangements
    • F25B2313/0315Temperature sensors near the outdoor heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion valves

Abstract

An air conditioner defrosting control method, which aims to solve the problem that the existing air conditioners have a poor way of detecting the frosting condition of outdoor coils, and the defrosting efficiency of the existing defrosting methods is low. Therefore, the defrosting control method includes the following steps: determining the frosting degree of each group of coils, so that the air conditioner can accurately and comprehensively judge the frosting condition of the whole outdoor unit; according to the frosting degree of each group of coils, controlling the flow of refrigerant in each group of coils, that is, the defrosting requirements of each group of coils can be judged according to the frosting degree of each group of coils, so that the flow of refrigerant in each group of coils is controlled to adapt to the frosting degree of each group of coils, thereby effectively shortening the defrosting time of the air conditioner, and then greatly improving the defrosting efficiency of the air conditioner.

Description

用于空调器的除霜控制方法Defrosting control method for air conditioner 技术领域Technical field
本发明属于空调器技术领域,具体涉及一种用于空调器的除霜控制方法。The invention belongs to the technical field of air conditioners, and specifically relates to a defrosting control method for an air conditioner.
背景技术Background technique
随着人们生活水平的不断提高,人们对生活环境也提出了越来越高的要求。为了维持舒适的环境温度,空调器已经成为人们生活中必不可少的一种设备。通常地,空调器包括室内机、室外机以及用于连接室内机与室外机的循环回路,空调器中的冷媒通过循环回路在室外机与室内机之间不断换热,从而达到改变室温的效果。以空调器制热运行时为例,室外机的盘管始终处于温度较低的状态,并且室外温度本身就较低;此时,如果室外环境还具有较高湿度,则室外机的盘管就很容易产生结霜现象,结霜现象的产生会严重影响空调器的换热效率,进而影响室内环境的舒适度。因此,在空调器制热运行时,空调器需要时常监测室外机的盘管是否产生结霜现象。With the continuous improvement of people's living standards, people have put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, the air conditioner has become an essential device in people's lives. Generally, an air conditioner includes an indoor unit, an outdoor unit, and a circulation circuit for connecting the indoor unit and the outdoor unit. The refrigerant in the air conditioner continuously exchanges heat between the outdoor unit and the indoor unit through the circulation circuit to achieve the effect of changing the room temperature. . Taking the heating operation of an air conditioner as an example, the coil of the outdoor unit is always at a low temperature, and the outdoor temperature itself is low; at this time, if the outdoor environment still has high humidity, the coil of the outdoor unit is It is easy to produce frosting, and the occurrence of frosting will seriously affect the heat exchange efficiency of the air conditioner, thereby affecting the comfort of the indoor environment. Therefore, during the heating operation of the air conditioner, the air conditioner needs to constantly monitor whether the coil of the outdoor unit is frosted.
为了对室外机盘管的结霜情况进行时时监测,现有空调器室外机的盘管上通常都设置有温度传感器,空调器通过室外机的盘管温度来判断室外机盘管的结霜情况,以便在室外机盘管出现结霜现象时,空调器能够及时运行除霜模式。但是,现有大部分空调器的室外机都设置有多组盘管,单单通过一个监测点的监测温度很难准确判断整个室外机盘管的结霜情况。进一步地,每组室外机盘管的结霜情况在很多时候也是不同的,而现有空调器在运行除霜模式时,仅是通过使空调器中的冷媒逆循环流动来达到除霜效果,却并没有根据各组室外机盘管的结霜情况对每组室外机盘管中的冷媒流量分别进行控制,因而导致现有除霜方式的除霜速度和除霜效率均较低的问题。In order to constantly monitor the frosting of the outdoor unit coil, the coil of the existing air conditioner outdoor unit is usually equipped with a temperature sensor, and the air conditioner judges the frosting condition of the outdoor unit coil by the temperature of the outdoor unit coil , So that when the outdoor unit coil is frosted, the air conditioner can run the defrost mode in time. However, most of the existing outdoor units of air conditioners are equipped with multiple sets of coils, and it is difficult to accurately determine the frosting condition of the entire outdoor unit coils by monitoring the temperature at one monitoring point. Furthermore, the frosting situation of each group of outdoor unit coils is also different in many cases, and when the existing air conditioner operates in the defrost mode, the defrost effect is achieved only by making the refrigerant in the air conditioner flow in the reverse cycle. However, the flow of refrigerant in each group of outdoor unit coils is not separately controlled according to the frosting condition of each group of outdoor unit coils, which leads to the problem of low defrosting speed and defrosting efficiency of existing defrosting methods.
相应地,本领域需要一种新的用于空调器的除霜控制方法来解决上述问题。Correspondingly, a new defrosting control method for air conditioners is needed in the art to solve the above problems.
发明内容Summary of the invention
为了解决现有技术中的上述问题,即为了解决现有空调器检测室外盘管的结霜情况的方式不佳,且现有除霜方式的除霜效率较低的问题,本发明提供了一种用于空调器的除霜控制方法,所述空调器的室外机包括多组盘管,所述除霜控制方法包括下列步骤:确定每组盘管的结霜程度;根据每组盘管的结霜程度,控制每组盘管中的冷媒流量。In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the existing air conditioner detects the frosting condition of the outdoor coil and the defrosting efficiency of the existing defrosting method is low, the present invention provides a A defrosting control method for an air conditioner. The outdoor unit of the air conditioner includes multiple sets of coils. The defrosting control method includes the following steps: determining the degree of frosting of each set of coils; The degree of frosting controls the flow of refrigerant in each coil.
在上述用于空调器的除霜控制方法的优选技术方案中,“确定每组盘管的结霜程度”的步骤具体包括:获取每组盘管的盘管温度,作为结霜程度的指标;“根据每组盘管的结霜程度,控制每组盘管中的冷媒流量”的步骤具体包括:根据每组盘管的盘管温度,控制每组盘管中的冷媒流量。In the above-mentioned preferred technical solution of the defrosting control method for air conditioners, the step of "determining the degree of frosting of each group of coils" specifically includes: obtaining the coil temperature of each group of coils as an index of the degree of frosting; The steps of "controlling the flow of refrigerant in each coil according to the degree of frosting of each coil" specifically include: controlling the flow of refrigerant in each coil according to the coil temperature of each coil.
在上述用于空调器的除霜控制方法的优选技术方案中,“根据每组盘管的盘管温度,控制每组盘管中的冷媒流量”的步骤具体包括:将每组盘管的盘管温度与预设温度进行比较;根据比较结果控制每组盘管中的冷媒流量。In the above-mentioned preferred technical solution of the defrost control method for air conditioners, the step of "controlling the flow of refrigerant in each group of coils according to the coil temperature of each group of coils" specifically includes: The tube temperature is compared with the preset temperature; the refrigerant flow rate in each group of coils is controlled according to the comparison result.
在上述用于空调器的除霜控制方法的优选技术方案中,每组盘管的入口处均设置有节流构件,“根据比较结果控制每组盘管中的冷媒流量”的步骤具体包括:根据所述预设温度与每组盘管的盘管温度的差值的大小,控制每个节流构件的开度大小。In the above-mentioned preferred technical solution of the defrosting control method for an air conditioner, a throttle member is provided at the entrance of each group of coils, and the step of "controlling the flow of refrigerant in each group of coils according to the comparison result" specifically includes: According to the size of the difference between the preset temperature and the coil temperature of each group of coils, the opening of each throttle member is controlled.
在上述用于空调器的除霜控制方法的优选技术方案中,所述节流构件为电子膨胀阀。In the above preferred technical solution of the defrosting control method for an air conditioner, the throttle member is an electronic expansion valve.
在上述用于空调器的除霜控制方法的优选技术方案中,所述节流构件的控制方式为:所述差值越大,所述节流构件的开度越大。In the above-mentioned preferred technical solution of the defrosting control method for an air conditioner, the control method of the throttle member is: the greater the difference, the greater the opening degree of the throttle member.
在上述用于空调器的除霜控制方法的优选技术方案中,在“根据所述预设温度与每组盘管的盘管温度的差值的大小,控制每个节流构件的开度大小”的步骤之后,所述除霜控制方法还包括:再次获取每组盘管的盘管温度;根据每组盘管的盘管温度,选择性地调节每个节流构件的开度大小。In the above-mentioned preferred technical solution of the defrosting control method for an air conditioner, the opening degree of each throttling member is controlled according to the difference between the preset temperature and the coil temperature of each group of coils After the step of ", the defrost control method further includes: obtaining the coil temperature of each group of coils again; and selectively adjusting the opening size of each throttling member according to the coil temperature of each group of coils.
在上述用于空调器的除霜控制方法的优选技术方案中,“根据每组盘管的盘管温度,选择性地调节每个节流构件的开度大小”的步 骤具体包括:如果每组盘管的盘管温度均相等,则控制各个节流构件以预设速度增大开度,直至所有节流构件的开度均达到预设开度。In the above-mentioned preferred technical solution for the defrosting control method for an air conditioner, the step of "selectively adjusting the opening of each throttle member according to the coil temperature of each group of coils" specifically includes: If the coil temperature of the coil is equal, each throttle member is controlled to increase the opening degree at a preset speed until the opening degree of all the throttle members reaches the preset opening degree.
在上述用于空调器的除霜控制方法的优选技术方案中,在“根据每组盘管的盘管温度,控制每组盘管中的冷媒流量”的步骤之前,所述除霜控制方法还包括:分别判断每组盘管的盘管温度是否小于除霜温度;“根据每组盘管的盘管温度,控制每组盘管中的冷媒流量”的步骤具体包括:在所有盘管温度中的至少一个小于所述除霜温度的情况下,才根据每组盘管的盘管温度,控制每组盘管中的冷媒流量。In the above-mentioned preferred technical solution of the defrosting control method for an air conditioner, before the step of "controlling the flow of refrigerant in each group of coils according to the coil temperature of each group of coils", the defrosting control method also Including: separately determine whether the coil temperature of each group of coils is less than the defrost temperature; the step of "controlling the flow of refrigerant in each group of coils according to the coil temperature of each group of coils" specifically includes: in all coil temperatures When at least one of is lower than the defrosting temperature, the flow rate of the refrigerant in each group of coils is controlled according to the coil temperature of each group of coils.
在上述用于空调器的除霜控制方法的优选技术方案中,每组盘管的入口处均设置有温度传感器,“获取每组盘管的盘管温度”的步骤具体包括:通过所述温度传感器获取每组盘管的盘管温度。In the above-mentioned preferred technical solution for the defrosting control method of an air conditioner, a temperature sensor is provided at the entrance of each group of coils, and the step of "acquiring the coil temperature of each group of coils" specifically includes: passing the temperature The sensor obtains the coil temperature of each group of coils.
本领域技术人员能够理解的是,在本发明的技术方案中,本发明的空调器的室外机包括多组盘管,本发明的除霜控制方法包括下列步骤:确定每组盘管的结霜程度,以便所述空调器能够对室外机的结霜情况进行准确而全面的判断;接着,根据每组盘管的结霜程度,控制每组盘管中的冷媒流量。本发明的除霜控制方法通过每组盘管的结霜程度分别控制每组盘管中的冷媒流量,需要说明的是,室外机的冷媒总流量是一定的,即供应给所有盘管的冷媒流量的总和是受到限制的,而除霜效果与冷媒流量通常又是呈正相关关系的,因此,本发明的除霜控制方法通过每组盘管的结霜程度来控制每组盘管中的冷媒流量,即根据每组盘管的除霜需求来控制每组盘管中的冷媒流量,以使每组盘管中的冷媒流量与每组盘管的结霜程度相适应,从而有效缩短所述空调器的除霜时间,进而使得所述空调器的除霜效率得到大幅提高。Those skilled in the art can understand that in the technical solution of the present invention, the outdoor unit of the air conditioner of the present invention includes multiple sets of coils, and the defrosting control method of the present invention includes the following steps: determining the frosting of each set of coils So that the air conditioner can accurately and comprehensively judge the frosting condition of the outdoor unit; then, according to the frosting degree of each group of coils, control the flow of refrigerant in each group of coils. The defrosting control method of the present invention controls the flow of refrigerant in each coil by the degree of frosting of each coil. It should be noted that the total refrigerant flow of the outdoor unit is constant, that is, the refrigerant supplied to all coils The total flow rate is limited, and the defrosting effect and the refrigerant flow rate are usually positively correlated. Therefore, the defrost control method of the present invention controls the refrigerant in each group of coils by the degree of frosting of each group of coils. Flow rate, that is, control the refrigerant flow rate in each coil group according to the defrosting requirements of each coil group, so that the refrigerant flow rate in each coil group is adapted to the degree of frosting of each group coil, thereby effectively reducing the The defrosting time of the air conditioner further greatly improves the defrosting efficiency of the air conditioner.
进一步地,在本发明的优选技术方案中,本发明的除霜控制方法通过获取每组盘管的盘管温度作为结霜程度的指标以判断每组盘管的结霜程度。可以理解的是,通常地,在一定温度范围内,盘管温度越低盘管的结霜程度就越严重;因此,本发明通过获取较易获取的盘管温度来对每组盘管的结霜程度进行判断,这样不仅能够有效简化获取基础参数的步骤,还能够有效提高判断结果的准确性,进而使得所述空调器能够对室外机的结霜情况进行准确而全面的判断。优选地,本发明通过 在每组盘管的入口处设置温度传感器来获取每组盘管的盘管温度,以便有效保证获取结果的准确性。Further, in the preferred technical scheme of the present invention, the defrost control method of the present invention obtains the coil temperature of each group of coils as an index of the degree of frosting to determine the degree of frosting of each group of coils. It can be understood that, generally, within a certain temperature range, the lower the coil temperature, the more serious the degree of frosting of the coil; therefore, the present invention obtains the easier-to-obtain coil temperature to control the frosting of each group of coils. The degree of frost is judged, which not only can effectively simplify the steps of obtaining the basic parameters, but also can effectively improve the accuracy of the judgment result, thereby enabling the air conditioner to accurately and comprehensively judge the frosting condition of the outdoor unit. Preferably, the present invention obtains the coil temperature of each coil by installing a temperature sensor at the entrance of each coil, so as to effectively ensure the accuracy of the obtained results.
进一步地,在本发明的优选技术方案中,本发明的除霜控制方法能够根据所述预设温度与每组盘管的盘管温度的差值大小控制每个节流构件的开度大小;可以理解的是,由于所述节流构件设置在每组盘管的入口处,因此,所述空调器通过控制所述节流构件的开度就能够控制每组盘管中的冷媒流量,并且由于所述预设温度与每组盘管的盘管温度的差值能够代表每组盘管的结霜程度。鉴于此,本发明通过所述预设温度与每组盘管的盘管温度的差值来判断每组盘管的结霜程度,再根据每组盘管的结霜程度来控制每个节流构件的开度大小,从而控制每组盘管中的冷媒流量,以使每组盘管中的冷媒流量与每组盘管的结霜程度相适应,从而有效提升所述空调器的除霜效率。优选地,所述节流构件为电子膨胀阀,以便所述空调器能够通过控制所述电子膨胀阀的开度来对每组盘管中的冷媒流量进行精确控制。Further, in a preferred technical solution of the present invention, the defrost control method of the present invention can control the opening of each throttle member according to the difference between the preset temperature and the coil temperature of each group of coils; It is understandable that, because the throttle member is provided at the entrance of each group of coils, the air conditioner can control the flow of refrigerant in each group of coils by controlling the opening of the throttle member, and Because the difference between the preset temperature and the coil temperature of each group of coils can represent the degree of frosting of each group of coils. In view of this, the present invention judges the frosting degree of each group of coils by the difference between the preset temperature and the coil temperature of each group of coils, and then controls each throttle according to the frosting degree of each group of coils The size of the opening of the component to control the flow of refrigerant in each group of coils, so that the flow of refrigerant in each group of coils is compatible with the degree of frosting of each group of coils, thereby effectively improving the defrosting efficiency of the air conditioner . Preferably, the throttling member is an electronic expansion valve, so that the air conditioner can accurately control the flow of refrigerant in each set of coils by controlling the opening degree of the electronic expansion valve.
进一步地,在本发明的优选技术方案中,在“根据所述预设温度与每组盘管的盘管温度的差值的大小,控制每个节流构件的开度大小”的步骤之后,所述空调器能够再次获取每组盘管的盘管温度,以便有效判断每组盘管的除霜情况;接着,所述空调器能够根据每组盘管的除霜情况选择性地调节每个节流构件的开度大小,即所述空调器能够根据每组盘管的除霜情况选择性地调节每组盘管中的冷媒流量。具体而言,如果每组盘管的盘管温度均相等,则所述空调器判断室外盘管已经不存在结霜现象,此时,所述空调器控制各个节流构件以预设速度增大开度,直至所有节流构件的开度均达到预设开度,以便有效保证所述空调器在继续运行制热模式时能够具有较高的制热效率。Further, in the preferred technical solution of the present invention, after the step of "controlling the opening of each throttle member according to the difference between the preset temperature and the coil temperature of each group of coils", The air conditioner can obtain the coil temperature of each group of coils again to effectively determine the defrosting condition of each group of coils; then, the air conditioner can selectively adjust each group of coils according to the defrosting condition of each group of coils. The opening degree of the throttle member, that is, the air conditioner can selectively adjust the flow rate of the refrigerant in each group of coils according to the defrosting condition of each group of coils. Specifically, if the coil temperatures of each group of coils are equal, the air conditioner determines that there is no frosting on the outdoor coils. At this time, the air conditioner controls each throttle member to increase at a preset speed. The opening degree until the opening degree of all the throttle members reach the preset opening degree, so as to effectively ensure that the air conditioner can have a higher heating efficiency when the air conditioner continues to operate in the heating mode.
进一步地,在本发明的优选技术方案中,在“根据每组盘管的盘管温度,控制每组盘管中的冷媒流量”的步骤之前,所述空调器能够分别判断每组盘管的盘管温度是否小于除霜温度,即各组盘管是否产生结霜现象;在所有盘管温度中的至少一个小于所述除霜温度的情况下,则说明所有盘管中至少存在一组盘管已经产生结霜现象,为了有效保证所述空调器的制热效率,所述空调器才根据每组盘管的盘管温度,控制每组盘管中的冷媒流量,以便尽快消除室外盘管的结霜现象。Further, in the preferred technical scheme of the present invention, before the step of "controlling the flow of refrigerant in each group of coils according to the coil temperature of each group of coils", the air conditioner can separately determine the Whether the coil temperature is less than the defrosting temperature, that is, whether each group of coils has frost; if at least one of the coil temperatures is less than the defrost temperature, it means that there is at least one group of coils in all coils The tube has frosted. In order to effectively ensure the heating efficiency of the air conditioner, the air conditioner controls the flow of refrigerant in each coil according to the coil temperature of each coil, so as to eliminate the outdoor coil as soon as possible. Frost phenomenon.
附图说明Description of the drawings
图1是本发明的除霜控制方法的主要步骤流程图;Figure 1 is a flow chart of the main steps of the defrost control method of the present invention;
图2是本发明的除霜控制方法的优选实施例的步骤流程图。Fig. 2 is a flowchart of the steps of a preferred embodiment of the defrost control method of the present invention.
具体实施方式Detailed ways
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。例如,尽管本申请中按照特定顺序描述了本发明的方法的各个步骤,但是这些顺序并不是限制性的,在不偏离本发明的基本原理的前提下,本领域技术人员可以按照不同的顺序来执行所述步骤。需要说明的是,在本发明的描述中,除非另有明确的规定和限定,术语“相连”和“连接”应做广义理解,例如,可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域技术人员而言,可根据具体情况理解上述术语在本发明中的具体含义。Hereinafter, preferred embodiments of the present invention will be described 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. For example, although the various steps of the method of the present invention are described in a specific order in this application, these orders are not limitative, and those skilled in the art can follow a different order without departing from the basic principles of the present invention. Perform the steps described. It should be noted that in the description of the present invention, unless expressly stipulated and limited otherwise, the terms "connected" and "connected" should be interpreted broadly. For example, they can be directly connected or indirectly connected through an intermediary. It is the connection between the two components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present invention can be understood according to specific circumstances.
基于背景技术中提出的现有大部分空调器的室外机都设置有多组盘管,单单通过一个监测点的监测温度很难准确判断整个室外机盘管的结霜情况。同时,每组室外机盘管的结霜情况在很多时候也是不同的,而现有空调器在运行除霜模式时,仅是通过使空调器中的冷媒逆循环流动来达到除霜效果,却并没有根据各组室外机盘管的结霜情况对每组室外机盘管中的冷媒流量分别进行控制,因而导致现有除霜方式的除霜速度和除霜效率均较低的问题。为此,本发明提供了一种新的除霜控制方法,所述除霜控制方法能够根据每组盘管的结霜程度来控制每组盘管中的冷媒流量,以使每组盘管中的冷媒流量与每组盘管的结霜程度相适应,从而有效缩短所述空调器的除霜时间,进而使得所述空调器的除霜效率得到大幅提高。The outdoor units of most existing air conditioners proposed in the background art are equipped with multiple sets of coils, and it is difficult to accurately determine the frosting situation of the entire outdoor unit coils by monitoring the temperature at one monitoring point. At the same time, the frosting situation of each group of outdoor unit coils is different in many cases. When the existing air conditioner is running in the defrost mode, the defrosting effect is achieved only by making the refrigerant flow in the air conditioner reversely. The flow of refrigerant in each group of outdoor unit coils is not separately controlled according to the frosting condition of each group of outdoor unit coils, which leads to the problem of low defrosting speed and defrosting efficiency of existing defrosting methods. To this end, the present invention provides a new defrost control method, which can control the flow of refrigerant in each group of coils according to the degree of frosting of each group of coils, so that each group of coils The refrigerant flow rate is adapted to the degree of frosting of each set of coils, thereby effectively shortening the defrosting time of the air conditioner, thereby greatly improving the defrosting efficiency of the air conditioner.
具体地,作为一种优选实施例,本发明的空调器包括室内机以及与所述室内机相连的室外机,当然,本发明不对所述室内机的设置数量作任何限制;其中,所述室外机包括多组盘管,从所述室外机的压缩机中流出的冷媒经过分液器分流后再分别流入多组盘管中,需要说明 的是,本发明不对所述空调器的具体结构作任何限制,技术人员可以根据实际使用需求自行设定所述空调器的具体结构,只要所述空调器的室外机包括多组盘管即可。Specifically, as a preferred embodiment, the air conditioner of the present invention includes an indoor unit and an outdoor unit connected to the indoor unit. Of course, the present invention does not impose any limitation on the number of the indoor units; wherein, the outdoor unit The machine includes multiple sets of coils, and the refrigerant flowing out of the compressor of the outdoor unit is divided by a liquid separator and then flows into the multiple sets of coils. It should be noted that the present invention does not affect the specific structure of the air conditioner. Regardless of any limitation, technicians can set the specific structure of the air conditioner according to actual use requirements, as long as the outdoor unit of the air conditioner includes multiple sets of coils.
进一步地,每组盘管的入口处均设置有电子膨胀阀和温度传感器,所述电子膨胀阀能够控制所述盘管中的冷媒流量,所述温度传感器能够检测所述盘管的盘管温度。需要说明的是,本发明不对所述电子膨胀阀的设置位置作任何限制,只要所述空调器能够通过控制所述电子膨胀阀的开度来控制所述盘管中的冷媒流量即可;同时,虽然本优选实施例中所述的节流构件为电子膨胀阀,但是,技术人员显然还可以根据实际使用需求自行选定所述节流构件的种类,例如所述节流构件还可以是具有调节流量功能的阀结构等,这种具体设置位置和类型的改变并不偏离本发明的基本原理,属于本发明的保护范围。此外,本发明也不对所述温度传感器的设置位置作任何限制,例如,所述温度传感器还可以直接设置在所述盘管上,并且本发明也不对所述温度传感器的具体类型作任何限制,技术人员可以根据实际使用需求自行设定所述温度传感器的设置位置和具体类型,只要所述温度传感器能够获取所述盘管的盘管温度即可。Further, an electronic expansion valve and a temperature sensor are provided at the inlet of each group of coils, the electronic expansion valve can control the flow of refrigerant in the coil, and the temperature sensor can detect the coil temperature of the coil . It should be noted that the present invention does not impose any restriction on the installation position of the electronic expansion valve, as long as the air conditioner can control the refrigerant flow in the coil by controlling the opening of the electronic expansion valve; Although the throttling member in this preferred embodiment is an electronic expansion valve, it is obvious that the skilled person can also select the type of the throttling member according to actual needs. For example, the throttling member may also have The change of the valve structure for adjusting the flow function, etc., the specific setting position and type does not deviate from the basic principle of the present invention, and belongs to the protection scope of the present invention. In addition, the present invention does not impose any restriction on the location of the temperature sensor. For example, the temperature sensor can also be directly arranged on the coil, and the present invention does not impose any restriction on the specific type of the temperature sensor. The technician can set the setting position and specific type of the temperature sensor according to actual use requirements, as long as the temperature sensor can obtain the coil temperature of the coil.
更进一步地,所述空调器还包括控制器,所述控制器能够获取各个温度传感器的检测数据,并且所述控制器还能够控制各个电子膨胀阀的开度,从而控制所述空调器的运行状态。本领域技术人员能够理解的是,本发明不对所述控制器的具体结构和型号作任何限制,并且所述控制器可以是所述空调器原有的控制器,也可以是为执行本发明的除霜控制方法单独设置的控制器,技术人员可以根据实际使用需求自行设定所述控制器的结构和型号。Furthermore, the air conditioner further includes a controller that can obtain detection data of each temperature sensor, and the controller can also control the opening of each electronic expansion valve, thereby controlling the operation of the air conditioner status. Those skilled in the art can understand that the present invention does not impose any restrictions on the specific structure and model of the controller, and the controller may be the original controller of the air conditioner, or it may be used to implement the present invention. For a controller with a separate defrosting control method, technicians can set the structure and model of the controller according to actual needs.
首先参阅图1,该图是本发明的除霜控制方法的主要步骤流程图。如图1所示,本发明的除霜控制方法主要包括下列步骤:First, refer to Figure 1, which is a flowchart of the main steps of the defrost control method of the present invention. As shown in Figure 1, the defrost control method of the present invention mainly includes the following steps:
S1:确定每组盘管的结霜程度;S1: Determine the frosting degree of each group of coils;
S2:根据每组盘管的结霜程度,控制每组盘管中的冷媒流量。S2: Control the flow of refrigerant in each coil according to the frosting degree of each coil.
进一步地,在步骤S1中,所述控制器能够确定每组盘管的结霜程度,以便将各组盘管的结霜程度作为本除霜控制方法的基本参数信息;需要说明的是,本发明不对所述控制器确定盘管结霜程度的方式 作任何限制,技术人员可以根据实际使用需求自行设定所述控制器确定盘管结霜程度的具体方式,例如,所述控制器可以通过获取室外盘管的图像来确定每组盘管的结霜程度,也可以通过分别获取每组盘管的盘管温度来确定每组盘管的结霜程度,这种具体确定方式的改变并不偏离本发明的基本原理,属于本发明的保护范围。Further, in step S1, the controller can determine the degree of frosting of each group of coils, so as to use the degree of frosting of each group of coils as the basic parameter information of the defrosting control method; it should be noted that this The invention does not impose any restriction on the method for the controller to determine the degree of frosting of the coil. The technician can set the specific method for determining the degree of frosting of the coil by the controller according to actual use requirements. For example, the controller can use Obtain the image of the outdoor coils to determine the degree of frosting of each group of coils. You can also determine the degree of frosting of each group of coils by separately obtaining the coil temperature of each group of coils. This specific determination method does not change. Deviations from the basic principles of the present invention belong to the protection scope of the present invention.
进一步地,在步骤S2中,所述控制器能够根据每组盘管的结霜程度控制每组盘管中的冷媒流量。具体而言,一组盘管的结霜程度越严重,则所述控制器给该组盘管分配越多的冷媒,以使其冷媒流量越大,除霜速度越快;反之,一组盘管的结霜程度越轻微,则所述控制器给该组盘管分配越少的冷媒,以使其冷媒流量越小,即保证该组盘管也能够实现除霜效果即可,无需过快的除霜速度,进而有效兼顾整个室外盘管的除霜效率。当然,这种描述仅是示例性的,技术人员显然还可以根据实际使用需求自行设定盘管的结霜程度与盘管中的冷媒流量之间的对应关系,只要所述控制器根据每组盘管的结霜程度来控制每组盘管中的冷媒流量就属于本发明的保护范围。此外,本领域技术人员还能够理解的是,本发明不对所述控制器控制每组盘管中的冷媒流量的方式作任何限制,所述控制器既可以通过内设的节流构件来控制冷媒流量,也可以通过外接的节流构件来控制冷媒流量;换言之,技术人员可以根据实际使用需求自行设定冷媒流量的控制方式。Further, in step S2, the controller can control the flow of refrigerant in each group of coils according to the degree of frosting of each group of coils. Specifically, the more severe the frosting of a group of coils, the more refrigerant will be distributed to the group of coils by the controller, so that the greater the refrigerant flow rate, the faster the defrosting speed; The less the degree of frosting of the tube is, the less refrigerant will be distributed by the controller to the group of coils to make the refrigerant flow smaller, that is, to ensure that the group of coils can also achieve the defrosting effect, without too fast The defrosting speed can effectively take into account the defrosting efficiency of the entire outdoor coil. Of course, this description is only exemplary. Obviously, the technicians can also set the corresponding relationship between the frosting degree of the coil and the refrigerant flow rate in the coil according to actual use requirements, as long as the controller is based on each group The degree of frosting of the coils to control the flow of refrigerant in each group of coils belongs to the protection scope of the present invention. In addition, those skilled in the art can also understand that the present invention does not impose any restrictions on the manner in which the controller controls the flow of refrigerant in each set of coils. The controller can control the refrigerant through a built-in throttling component. The flow rate can also be controlled by an external throttling component; in other words, the technician can set the control method of the refrigerant flow rate by himself according to actual needs.
下面参阅图2,该图是本发明的除霜控制方法的优选实施例的流程图。如图2所示,基于上述实施例中所述的空调器,本发明的优选实施例具体包括下列步骤:Next, refer to FIG. 2, which is a flowchart of a preferred embodiment of the defrost control method of the present invention. As shown in Figure 2, based on the air conditioner described in the above embodiment, the preferred embodiment of the present invention specifically includes the following steps:
S101:获取每组盘管的盘管温度,作为结霜程度的指标;S101: Obtain the coil temperature of each group of coils as an indicator of the degree of frost;
S102:判断所有盘管温度中是否存在至少一个小于除霜温度;如果是,则执行步骤S103;如果否,则执行步骤S101;S102: Determine whether at least one of all coil temperatures is lower than the defrost temperature; if yes, execute step S103; if not, execute step S101;
S103:根据预设温度与每组盘管的盘管温度的差值,控制每个电子膨胀阀的开度;S103: Control the opening degree of each electronic expansion valve according to the difference between the preset temperature and the coil temperature of each group of coils;
S104:再次获取每组盘管的盘管温度;S104: Obtain the coil temperature of each group of coils again;
S105:判断所有盘管的盘管温度是否相等;如果是,则执行步骤S106;如果否,则执行步骤S104;S105: Determine whether the coil temperatures of all coils are equal; if yes, go to step S106; if not, go to step S104;
S106:控制各个电子膨胀阀以预设速度增大开度,至所有电子膨胀阀均达到全开为止。S106: Control each electronic expansion valve to increase the opening at a preset speed until all the electronic expansion valves are fully opened.
进一步地,在步骤S101中,所述控制器能够根据设置在各组盘管的入口处的温度传感器分别获取各组盘管的盘管温度,以便根据盘管温度来判断每组盘管的结霜程度;需要说明的是,本发明不对所述控制器获取每组盘管的盘管温度的方式作任何限制,所述控制器既可以通过所述空调器自身设置的温度传感器来获取每组盘管的盘管温度,也可以通过外部设置的温度传感器来获取每组盘管的盘管温度,技术人员可以根据实际使用需求自行设定其获取方式,只要所述控制器能够获取到每组盘管的盘管温度即可。Further, in step S101, the controller can obtain the coil temperature of each group of coils according to the temperature sensor provided at the entrance of each group of coils, so as to determine the coil temperature of each group of coils according to the temperature of the coils. The degree of frost; it should be noted that the present invention does not impose any limitation on the way the controller obtains the coil temperature of each group of coils. The controller can obtain each group of coil temperatures through the temperature sensor set by the air conditioner itself. The coil temperature of the coil can also be obtained through an external temperature sensor to obtain the coil temperature of each group of coils. The technician can set the acquisition method according to the actual use requirements, as long as the controller can obtain each group The coil temperature of the coil is sufficient.
进一步地,在步骤S102中,所述控制器能够将每组盘管的盘管温度分别与所述除霜温度进行比较,并且判断所有盘管温度中是否存在至少一个小于所述除霜温度。首先,需要说明的是,技术人员可以根据实际使用情况自行设定所述除霜温度的具体值,只要当该盘管的盘管温度小于所述除霜温度时,该盘管就已经出现结霜现象即可。可以理解的是,当所有盘管温度中出现至少一个温度小于所述除霜温度时,则说明所有盘管中至少有一组盘管已经产生结霜现象,在此情形下,执行步骤S103,以便对室外盘管进行及时除霜;而当所有盘管的盘管温度均大于所述目标结霜温度时,则说明所有盘管均未出现结霜现象,在此情形下,执行步骤S101,即继续对所有盘管的盘管温度进行监测,以便及时获取每组盘管的结霜程度。本领域技术人员还能够理解的是,本发明不对进入步骤S103的判断条件作任何限制,技术人员也可以通过设置其他条件作为所述空调器进入除霜模式的判断条件。Further, in step S102, the controller can respectively compare the coil temperature of each group of coils with the defrost temperature, and determine whether at least one of all coil temperatures is lower than the defrost temperature. First of all, it should be noted that technicians can set the specific value of the defrost temperature by themselves according to the actual use situation. As long as the coil temperature is lower than the defrost temperature, the coil has already been frozen. Frost phenomenon is sufficient. It is understandable that when at least one temperature of all coils is lower than the defrosting temperature, it means that at least one group of coils in all coils has formed frost. In this case, step S103 is executed to Defrost the outdoor coils in time; and when the coil temperatures of all coils are greater than the target frosting temperature, it means that no frosting occurs in all coils. In this case, step S101 is executed, namely Continue to monitor the coil temperature of all coils in order to obtain the frosting degree of each group of coils in time. Those skilled in the art can also understand that the present invention does not impose any restriction on the judgment condition for entering step S103, and the technician can also set other conditions as the judgment condition for the air conditioner to enter the defrosting mode.
进一步地,在步骤S103中,所述控制器能够根据所述预设温度与每组盘管的盘管温度的差值控制每个电子膨胀阀的开度,需要说明的是,技术人员可以根据实际使用情况自行设定所述预设温度的具体值,作为一种优选实施例,所述预设温度与所述除霜温度相等。在本优选实施例中,如果所述控制器判断出所述预设温度与某组盘管的盘管温度的差值越大,则控制设置在该组盘管的入口处的电子膨胀阀以较大开度运行;如果所述控制器判断出所述预设温度与某组盘管的盘管温度的差值越小,则控制设置在该组盘管的入口处的电子膨胀阀以较小开度运 行;当然,技术人员需要根据实际使用情况自行设定差值与开度之间的对应关系,这种具体对应关系的改变并不偏离本发明的基本原理,属于本发明的保护范围。作为一个示例,如果一个空调器的室外机包括五组盘管,而第一组盘管的盘管温度为﹣7℃,第二组盘管的盘管温度为﹣5℃,第三组盘管的盘管温度为﹣3℃,第四组盘管的盘管温度为﹣2℃,第五组盘管的盘管温度为﹣2℃;则所述控制器控制第一组盘管的电子膨胀阀开启500步,第二组盘管的电子膨胀阀开启480步,第三组盘管的电子膨胀阀开启450步,第四组盘管的电子膨胀阀开启430步,第五组盘管的电子膨胀阀开启430步;当然,这种描述仅是示例性的,并不对本发明的保护范围构成任何限制。本领域的技术人员能够理解的是,技术人员也可以直接通过预设温度和每组盘管的盘管温度来控制每组盘管中的冷媒流量,例如,先使每个电子膨胀阀均以一个预设开度运行,当盘管温度小于预设温度时,则使该盘管对应的电子膨胀阀的开度增大;当盘管温度大于或等于预设温度时,则使该盘管对应的电子膨胀阀的开度保持不变。换言之,技术人员可以根据实际使用情况自行设定该步骤中的具体控制逻辑,只要所述控制器根据预设温度和每组盘管的盘管温度控制每组盘管中的冷媒流量即属于本发明的保护范围内。Further, in step S103, the controller can control the opening degree of each electronic expansion valve according to the difference between the preset temperature and the coil temperature of each group of coils. The specific value of the preset temperature is set by the actual use situation. As a preferred embodiment, the preset temperature is equal to the defrost temperature. In this preferred embodiment, if the controller determines that the difference between the preset temperature and the coil temperature of a certain group of coils is greater, it controls the electronic expansion valve installed at the inlet of the group of coils to Run with a larger opening; if the controller determines that the difference between the preset temperature and the coil temperature of a certain group of coils is smaller, it controls the electronic expansion valve set at the inlet of the group of coils to compare Small opening operation; of course, the technician needs to set the corresponding relationship between the difference and the opening according to the actual use. The change of this specific corresponding relationship does not deviate from the basic principle of the present invention and belongs to the protection scope of the present invention . As an example, if the outdoor unit of an air conditioner includes five sets of coils, and the coil temperature of the first set of coils is ﹣7℃, the coil temperature of the second set of coils is ﹣5℃, and the third set of coils The coil temperature of the tube is ﹣3℃, the coil temperature of the fourth group of coils is ﹣2℃, and the coil temperature of the fifth group of coils is ﹣2℃; then the controller controls the coil temperature of the first group of coils. The electronic expansion valve is opened for 500 steps, the electronic expansion valve of the second group of coils is opened for 480 steps, the electronic expansion valve of the third group of coils is opened for 450 steps, the electronic expansion valve of the fourth group of coils is opened for 430 steps, and the fifth group of disks The electronic expansion valve of the tube is opened for 430 steps; of course, this description is only exemplary and does not constitute any limitation to the protection scope of the present invention. Those skilled in the art can understand that the technicians can also directly control the flow of refrigerant in each group of coils by preset temperature and the coil temperature of each group of coils. For example, first make each electronic expansion valve be When the coil temperature is lower than the preset temperature, the opening of the electronic expansion valve corresponding to the coil increases; when the coil temperature is greater than or equal to the preset temperature, the coil The opening degree of the corresponding electronic expansion valve remains unchanged. In other words, the technician can set the specific control logic in this step according to the actual use situation, as long as the controller controls the refrigerant flow in each group of coils according to the preset temperature and the coil temperature of each group of coils. Within the scope of protection of the invention.
进一步地,在步骤S104中,在经过除霜操作后,所述控制器能够根据设置在各组盘管的入口处的温度传感器再次获取各组盘管的盘管温度,以便根据盘管温度来判断每组盘管的除霜效果;需要说明的是,本发明不对所述控制器获取每组盘管的盘管温度的方式作任何限制,所述控制器既可以通过所述空调器自身设置的温度传感器来获取每组盘管的盘管温度,也可以通过外部设置的温度传感器来获取每组盘管的盘管温度,技术人员可以根据实际使用需求自行设定其获取方式,只要所述控制器能够获取到每组盘管的盘管温度即可。Further, in step S104, after the defrosting operation, the controller can obtain the coil temperature of each group of coils again according to the temperature sensor provided at the inlet of each group of coils, so as to determine the coil temperature according to the coil temperature. Determine the defrosting effect of each group of coils; it should be noted that the present invention does not impose any restrictions on the way the controller obtains the coil temperature of each group of coils, and the controller can be set by the air conditioner itself The temperature sensor of each group of coils can be used to obtain the coil temperature of each group of coils. The temperature sensor of each group of coils can also be obtained through an external temperature sensor. The technician can set the method of obtaining it according to actual needs. The controller can obtain the coil temperature of each group of coils.
进一步地,在步骤S105中,如果所述控制器判断出所有盘管的盘管温度均相等,则说明所有盘管均已不存在结霜现象,不然不同组盘管的盘管温度肯定还是会存在一定差异;在此情形下,所述控制器执行步骤S106,即所述控制器控制各个电子膨胀阀均以预设速度增大开度,直至所有电子膨胀阀达到全开状态为止,以便有效保证所述空调器在退出除霜模式而继续运行制热模式时能够具有较高的制热效率。在此 需要说明的是,技术人员可以根据实际使用需求自行设定所述预设速度的具体值,优选地,所述预设速度为1步/秒;并且各个电子膨胀阀既可以以相同速度开启,也可以以不同速度开启。同时,虽然本优选实施例中所述的预设开度为所述电子膨胀阀的最大开度,但是,技术人员显然还可以根据实际使用需求自行设定所述预设开度的具体值,这些具体数值的改变均不偏离本发明的基本原理。反之,如果所述控制器判断出所有盘管的盘管温度并不相等,则说明还有盘管存在结霜现象,在此情形下,维持当前的除霜模式,并再次执行步骤S104,以便所述控制器能够继续判断每组盘管的除霜情况。此外,本领域技术人员能够理解的是,虽然本优选实施例中采用所有盘管温度是否相等作为除霜结束的判断条件,但是,技术人员显然还可以根据实际使用需求自行设定其他条件作为除霜结束的判断条件,这种具体判断条件的改变并不偏离本发明的基本原理,属于本发明的保护范围。Further, in step S105, if the controller determines that the coil temperatures of all coils are equal, it means that there is no frosting phenomenon in all coils, otherwise the coil temperatures of different sets of coils will definitely still be There is a certain difference; in this case, the controller executes step S106, that is, the controller controls each electronic expansion valve to increase the opening at a preset speed until all the electronic expansion valves reach a fully open state, so as to be effective It is ensured that the air conditioner can have a higher heating efficiency when exiting the defrosting mode and continuing to run the heating mode. It should be noted here that technicians can set the specific value of the preset speed by themselves according to actual use requirements. Preferably, the preset speed is 1 step/second; and each electronic expansion valve can operate at the same speed. It can also be turned on at different speeds. At the same time, although the preset opening degree in this preferred embodiment is the maximum opening degree of the electronic expansion valve, it is obvious that the technician can also set the specific value of the preset opening degree by himself according to actual use requirements. The changes of these specific values do not deviate from the basic principle of the present invention. Conversely, if the controller determines that the coil temperatures of all the coils are not equal, it means that there is still frosting on the coils. In this case, maintain the current defrosting mode and perform step S104 again for The controller can continue to determine the defrosting status of each group of coils. In addition, those skilled in the art can understand that although in this preferred embodiment, whether all coil temperatures are equal is used as the judgment condition for the end of defrosting, the skilled person can obviously also set other conditions as the defrosting condition according to actual usage requirements. The judgment condition for the end of the frost, the change of this specific judgment condition does not deviate from the basic principle of the present invention, and belongs to the protection scope of the present invention.
最后需要说明的是,上述实施例均是本发明的优选实施方案,并不作为对本发明保护范围的限制。本领域技术人员在实际使用本发明时,可以根据需要适当添加或删减一部分步骤,或者调换不同步骤之间的顺序。这种改变并没有超出本发明的基本原理,属于本发明的保护范围。Finally, it should be noted that the above-mentioned examples are all preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Those skilled in the art can appropriately add or delete a part of the steps, or exchange the order between different steps, as needed when actually using the present invention. This change does not go beyond the basic principle of the present invention and belongs to the protection scope of the present invention.
至此,已经结合附图描述了本发明的优选实施方案,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。So far, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art will readily understand that the protection scope 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 substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

  1. 一种用于空调器的除霜控制方法,所述空调器的室外机包括多组盘管,其特征在于,所述除霜控制方法包括下列步骤:A defrosting control method for an air conditioner, the outdoor unit of the air conditioner includes multiple sets of coils, characterized in that the defrosting control method includes the following steps:
    确定每组盘管的结霜程度;Determine the frosting degree of each group of coils;
    根据每组盘管的结霜程度,控制每组盘管中的冷媒流量。According to the frosting degree of each group of coils, control the flow of refrigerant in each group of coils.
  2. 根据权利要求1所述的除霜控制方法,其特征在于,“确定每组盘管的结霜程度”的步骤具体包括:The defrosting control method according to claim 1, wherein the step of "determining the degree of frosting of each group of coils" specifically includes:
    获取每组盘管的盘管温度,作为结霜程度的指标;Obtain the coil temperature of each coil as an indicator of the degree of frost;
    “根据每组盘管的结霜程度,控制每组盘管中的冷媒流量”的步骤具体包括:The steps of "controlling the flow of refrigerant in each coil according to the frosting degree of each coil" specifically include:
    根据每组盘管的盘管温度,控制每组盘管中的冷媒流量。According to the coil temperature of each coil, control the flow of refrigerant in each coil.
  3. 根据权利要求2所述的除霜控制方法,其特征在于,“根据每组盘管的盘管温度,控制每组盘管中的冷媒流量”的步骤具体包括:The defrosting control method according to claim 2, wherein the step of "controlling the flow of refrigerant in each group of coils according to the coil temperature of each group of coils" specifically includes:
    将每组盘管的盘管温度与预设温度进行比较;Compare the coil temperature of each group of coils with the preset temperature;
    根据比较结果控制每组盘管中的冷媒流量。Control the flow of refrigerant in each coil group according to the comparison result.
  4. 根据权利要求3所述的除霜控制方法,其特征在于,每组盘管的入口处均设置有节流构件,“根据比较结果控制每组盘管中的冷媒流量”的步骤具体包括:The defrosting control method according to claim 3, wherein a throttling member is provided at the entrance of each group of coils, and the step of "controlling the flow of refrigerant in each group of coils according to the comparison result" specifically includes:
    根据所述预设温度与每组盘管的盘管温度的差值的大小,控制每个节流构件的开度大小。According to the size of the difference between the preset temperature and the coil temperature of each group of coils, the opening of each throttle member is controlled.
  5. 根据权利要求4所述的除霜控制方法,其特征在于,所述节流构件为电子膨胀阀。The defrost control method according to claim 4, wherein the throttle member is an electronic expansion valve.
  6. 根据权利要求4所述的除霜控制方法,其特征在于,所述节流构件的控制方式为:所述差值越大,所述节流构件的开度越大。The defrosting control method according to claim 4, wherein the control method of the throttle member is: the greater the difference, the greater the opening degree of the throttle member.
  7. 根据权利要求4所述的除霜控制方法,其特征在于,在“根据所述预设温度与每组盘管的盘管温度的差值的大小,控制每个节流构件的开度大小”的步骤之后,所述除霜控制方法还包括:The defrosting control method according to claim 4, characterized in that, "control the opening of each throttle member according to the difference between the preset temperature and the coil temperature of each group of coils" After the steps of, the defrost control method further includes:
    再次获取每组盘管的盘管温度;Obtain the coil temperature of each group of coils again;
    根据每组盘管的盘管温度,选择性地调节每个节流构件的开度大小。According to the coil temperature of each group of coils, the opening size of each throttling member is selectively adjusted.
  8. 根据权利要求7所述的除霜控制方法,其特征在于,“根据每组盘管的盘管温度,选择性地调节每个节流构件的开度大小”的步骤具体包括:The defrost control method according to claim 7, wherein the step of "selectively adjusting the opening of each throttle member according to the coil temperature of each group of coils" specifically includes:
    如果每组盘管的盘管温度均相等,则控制各个节流构件以预设速度增大开度,直至所有节流构件的开度均达到预设开度。If the coil temperature of each group of coils is equal, control each throttle member to increase the opening degree at a preset speed until the opening degree of all the throttle members reaches the preset opening degree.
  9. 根据权利要求2至8中任一项所述的除霜控制方法,其特征在于,在“根据每组盘管的盘管温度,控制每组盘管中的冷媒流量”的步骤之前,所述除霜控制方法还包括:The defrosting control method according to any one of claims 2 to 8, characterized in that, before the step of "controlling the flow rate of refrigerant in each coil according to the coil temperature of each coil", the Defrost control methods also include:
    分别判断每组盘管的盘管温度是否小于除霜温度;Determine whether the coil temperature of each group of coils is lower than the defrost temperature;
    “根据每组盘管的盘管温度,控制每组盘管中的冷媒流量”的步骤具体包括:The steps of "controlling the flow of refrigerant in each coil according to the coil temperature of each coil" specifically include:
    在所有盘管温度中的至少一个小于所述除霜温度的情况下,才根据每组盘管的盘管温度控制每组盘管中的冷媒流量。When at least one of the temperatures of all the coils is lower than the defrosting temperature, the flow rate of the refrigerant in each group of coils is controlled according to the coil temperature of each group of coils.
  10. 根据权利要求2至8中任一项所述的除霜控制方法,其特征在于,每组盘管的入口处均设置有温度传感器,“获取每组盘管的盘管温度”的步骤具体包括:The defrosting control method according to any one of claims 2 to 8, wherein a temperature sensor is provided at the entrance of each group of coils, and the step of "acquiring the coil temperature of each group of coils" specifically includes :
    通过所述温度传感器获取每组盘管的盘管温度。The coil temperature of each group of coils is obtained by the temperature sensor.
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CN110173939A (en) * 2019-05-17 2019-08-27 青岛海尔空调电子有限公司 Defrosting control method for air conditioner
CN112524746B (en) * 2019-09-17 2021-11-26 青岛海尔空调电子有限公司 Control method for outdoor unit balanced frosting in multi-split air conditioning system
CN110594959B (en) * 2019-09-18 2021-04-16 宁波奥克斯电气股份有限公司 Air conditioner control method
CN112303852B (en) * 2020-10-30 2022-11-22 青岛海尔空调电子有限公司 Defrosting control method of air conditioner outdoor unit and air conditioner outdoor unit

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