WO2023098051A1

WO2023098051A1 - Air conditioner control method and control apparatus, and air conditioner

Info

Publication number: WO2023098051A1
Application number: PCT/CN2022/101769
Authority: WO
Inventors: 王月亮; 吕福俊; 傅琳霞
Original assignee: 青岛海尔空调器有限总公司; 青岛海尔空调电子有限公司; 海尔智家股份有限公司
Priority date: 2021-11-30
Filing date: 2022-06-28
Publication date: 2023-06-08
Also published as: CN116202194A

Abstract

The air conditioner control method comprises: detecting an air discharging temperature of a compressor in a starting process; determining whether keeping control, frequency reduction control or forced shutdown protection conditions are met; if yes, performing corresponding keeping, frequency reduction or forced shutdown protection; recording the number of times for frequency reduction control and protection control; if one of the number of times for frequency reduction control and protection control meets an air discharging protection condition, performing air discharging protection control; determining whether the air discharging temperature of the compressor meets the frequency reduction control condition again, if yes, calling an air discharging temperature correction value to correct a boundary threshold value of the keeping control condition till an operation frequency of the compressor is kept within a set interval in a first set period, and calculating the sum of the air discharging temperature correction values; and comparing the sum of the air discharging temperature correction values with a plurality of refrigerant state set values to determine a current refrigerant state. Also disclosed are an air conditioner control apparatus and an air conditioner. According to the present invention, the condition of insufficient refrigerant amount and the actual state of the refrigerant can be automatically identified, the required data processing amount is low, and the intervention of the load change of the air conditioner is small.

Description

空调器控制方法、控制装置和空调器Air conditioner control method, control device and air conditioner

技术领域technical field

本发明属于空气调节技术领域，尤其涉及一种空调器控制方法，一种空调器控制装置以及一种空调器。The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioner control method, an air conditioner control device and an air conditioner.

背景技术Background technique

制冷剂、压缩机、蒸发器、节流装置、冷凝器是制冷***五大主要组成部分，其中制冷剂以流体形式在制冷***中循环以吸收或释放能量。制冷剂在制冷***中有三种存在形式，液态（过冷），蒸汽（过热）和饱和态（气液混合），其中饱和态制冷剂由任一比例的液态和蒸汽形式混合，过热态指制冷剂温度高于饱和蒸发温度，完全以蒸汽形式存在。过冷态指制冷剂温度低于饱和冷凝温度，完全以液态形式存在。液态转换为蒸汽时制冷剂吸热，蒸汽转换为液态时制冷剂放热。制冷***运行时，绝大部分制冷剂以液态或气饱和态形式存在于冷凝器和蒸发器。理想的制冷剂需要满足多种特性，例如：形态变化时能携带大量的热量；安全、稳定、可被检测到；压缩特性优良、环保、经济。虽然大多制冷剂的毒性低或者无毒，但是，由于制冷剂比空气重且会置换周围的氧气，因此过量的泄漏会对人体造成伤害，而且，制冷剂不足或泄漏也会造成制冷***的能力下降，影响设备的稳定性。Refrigerant, compressor, evaporator, throttling device, and condenser are the five main components of the refrigeration system, in which the refrigerant circulates in the refrigeration system in fluid form to absorb or release energy. Refrigerants exist in three forms in the refrigeration system, liquid (supercooled), steam (superheated) and saturated (gas-liquid mixing), in which the saturated refrigerant is mixed by any ratio of liquid and vapor forms, and the superheated state refers to refrigeration The temperature of the agent is higher than the saturated evaporation temperature, and it exists completely in the form of vapor. The supercooled state means that the refrigerant temperature is lower than the saturation condensation temperature and exists completely in liquid form. The refrigerant absorbs heat when the liquid state is converted to vapor, and the refrigerant releases heat when the vapor is converted to liquid state. When the refrigeration system is running, most of the refrigerant exists in the condenser and evaporator in the form of liquid or gas saturation. An ideal refrigerant needs to meet multiple characteristics, such as: it can carry a large amount of heat when it changes form; it is safe, stable, and detectable; it has excellent compression characteristics, is environmentally friendly, and is economical. Although most refrigerants have low or no toxicity, since refrigerants are heavier than air and displace the surrounding oxygen, excessive leakage can cause harm to the human body, and insufficient or leaking refrigerant can also affect the capacity of the refrigeration system. drop, affecting the stability of the device.

现有技术中公开了多种检测制冷剂泄漏或不足，尤其是空调装置中制冷剂泄漏的方法。其中一种为根据室内环境温度和盘管温度的差值进行判断，这种判断方式如果设定温差较大，在室内环境温度和设定温度接近时容易出现误判；如果设定温差较小，不容易检测且容易受到室内风机转速的影响。另一种如中国发明专利（CN109323363A）中公开的技术方案：“获取室内环境温度和室外环境温度；根据室内环境温度和室外环境温度获取参数阈值；获取空调器的运行参数；根据运行参数和参数阈值对空调器进行评分以生成评分值；根据空调器的评分值判断是否出现冷媒不足故障。”上述对比文件提供的是根据最终生成的评分值判断是否出现冷媒不足故障的方法，通过针对多个情况最终生成的评分值与预设的评分标准进行比较，实现准确判断冷媒是否发生泄漏。Various methods of detecting refrigerant leaks or shortages, especially in air conditioning units, are disclosed in the prior art. One of them is to judge based on the difference between the indoor ambient temperature and the coil temperature. If the set temperature difference is large, it is easy to misjudgment when the indoor ambient temperature and the set temperature are close; if the set temperature difference is small , is not easy to detect and is easily affected by the speed of the indoor fan. Another technical solution as disclosed in the Chinese invention patent (CN109323363A): "acquire indoor ambient temperature and outdoor ambient temperature; obtain parameter thresholds according to indoor ambient temperature and outdoor ambient temperature; obtain operating parameters of air conditioners; obtain operating parameters and parameters Thresholds are used to score the air conditioner to generate a score value; judge whether there is a refrigerant shortage fault based on the score value of the air conditioner.” The above comparison document provides a method for judging whether there is a refrigerant shortage fault based on the final score value. The final scoring value generated by the situation is compared with the preset scoring standard to accurately determine whether the refrigerant has leaked.

技术问题technical problem

采用上述方式，虽然可以准确的判断冷媒是否发生泄漏，但需要依赖处理器较高的数据处理能力，对于经济性的产品适用性较低；而且，***整体依赖多个传感器的检测结果，如果其中一个传感器发生硬件故障，则可能会导致整体评分出现偏差，降低判定结果的准确性。Using the above method, although it is possible to accurately determine whether the refrigerant has leaked, it needs to rely on the high data processing capability of the processor, which is less applicable to economical products; moreover, the system as a whole relies on the detection results of multiple sensors. A hardware failure of one sensor may lead to a deviation in the overall score and reduce the accuracy of the judgment result.

技术解决方案technical solution

本发明基于现有技术中根据室内环境温度和盘管温度的差值进行判断，存在如果设定温差较大，在室内环境温度和设定温度接近时容易出现误判；如果设定温差较小，不容易检测且容易受到室内风机转速的影响的问题，而针对多个情况最终生成的评分值与预设的评分标准进行比较以判断冷媒是否发生泄漏，需要依赖处理器较高的数据处理能力，***整体依赖多个传感器的检测结果，鲁棒性较低的问题，本发明的第一个方面提供一种空调器控制方法。The present invention judges based on the difference between the indoor ambient temperature and the coil temperature in the prior art. If the set temperature difference is large, it is easy to misjudgment when the indoor ambient temperature and the set temperature are close; if the set temperature difference is small , is not easy to detect and is easily affected by the speed of the indoor fan, and the final scoring value generated for multiple situations is compared with the preset scoring standard to judge whether the refrigerant leaks, which needs to rely on the higher data processing capability of the processor , The system as a whole relies on the detection results of multiple sensors, and the problem of low robustness, the first aspect of the present invention provides an air conditioner control method.

为实现上述发明目的，本发明采用下述技术方案予以实现：In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions to achieve:

一种空调器控制方法，包括以下步骤：A control method for an air conditioner, comprising the steps of:

在空调器正常启动过程中检测压缩机排气温度；Detect the compressor discharge temperature during the normal start-up process of the air conditioner;

判断所述压缩机排气温度是否满足保持控制条件、降频控制条件或强制停机保护条件中的其中任意一者；若满足，则执行对压缩机相应的保持控制、降频控制或强制停机保护；Judging whether the discharge temperature of the compressor satisfies any one of the maintenance control condition, frequency reduction control condition or forced shutdown protection condition; if it is satisfied, then execute the corresponding maintenance control, frequency reduction control or forced shutdown protection of the compressor ;

记录执行所述降频控制的降频控制次数以及执行强制停机保护控制的保护控制次数；如果所述降频控制次数和所述保护控制次数中的其中一者满足排气保护条件，则执行排气保护控制； Record the frequency reduction control times for performing the frequency reduction control and the protection control times for the forced shutdown protection control; if one of the frequency reduction control times and the protection control times meets the exhaust protection condition, execute exhaust Gas protection control;

执行所述排气保护控制时：判断所述压缩机排气温度是否再次满足降频控制条件，并在每次再次满足降频控制条件时，调用一次排气温度修正值修正所述保持控制条件的边界阈值直至压缩机运行频率在第一设定周期内保持在设定区间，计算排气温度修正值之和；When executing the exhaust protection control: judging whether the compressor discharge temperature satisfies the frequency reduction control condition again, and each time the frequency reduction control condition is satisfied again, call a discharge temperature correction value to correct the maintenance control condition Calculate the sum of the exhaust temperature correction values until the operating frequency of the compressor remains within the set interval within the first set cycle;

将所述排气温度修正值之和与多个冷媒状态设定值进行比较，确定当前冷媒状态；所述冷媒状态设定值分别与充足状态、第一冷媒不足状态和第二冷媒不足状态对应。Comparing the sum of the exhaust gas temperature correction value with multiple refrigerant state setting values to determine the current refrigerant state; the refrigerant state setting values correspond to the sufficient state, the first refrigerant insufficient state and the second refrigerant insufficient state respectively .

本发明的第二个方面提供一种空调器控制装置，空调器控制装置包括：A second aspect of the present invention provides an air conditioner control device, the air conditioner control device includes:

采样模块，所述采样模块配置为在空调器正常启动过程中检测压缩机排气温度；A sampling module, the sampling module is configured to detect the discharge temperature of the compressor during the normal start-up process of the air conditioner;

第一判定模块，所述第一判定模块配置为判断所述压缩机排气温度是否满足保持控制条件、降频控制条件或强制停机保护条件中的其中任意一者；A first judging module, the first judging module is configured to judge whether the discharge temperature of the compressor satisfies any one of the maintenance control condition, frequency reduction control condition or forced shutdown protection condition;

第一执行模块，所述第一执行模块配置为在所述压缩机排气温度满足保持控制条件、降频控制条件或强制停机保护条件中的其中任意一者时，执行对压缩机相应的保持控制、降频控制或强制停机保护；A first execution module, the first execution module is configured to execute corresponding maintenance of the compressor when the discharge temperature of the compressor satisfies any one of the maintenance control condition, frequency reduction control condition or forced shutdown protection condition Control, frequency reduction control or forced shutdown protection;

记录模块，所述记录模块配置为记录执行所述降频控制的降频控制次数以及执行强制停机保护控制的保护控制次数；A recording module, the recording module is configured to record the frequency reduction control times for performing the frequency reduction control and the protection control times for performing the forced shutdown protection control;

第二执行模块，所述第二执行模块配置为在所述降频控制次数和所述保护控制次数中的其中一者满足排气保护条件时执行排气保护控制；A second execution module, the second execution module is configured to execute exhaust protection control when one of the frequency reduction control times and the protection control times meets exhaust protection conditions;

第二判定模块，所述第二判定模块配置为在执行排气保护控制时判断所述压缩机排气温度是否再次满足降频控制条件；A second judging module, the second judging module is configured to judge whether the exhaust gas temperature of the compressor satisfies the frequency reduction control condition again when the exhaust protection control is executed;

计算模块，所述计算模块配置为在每次再次满足降频控制条件时，调用一次排气温度修正值修正所述保持控制条件的边界阈值直至压缩机运行频率在第一设定周期内保持在设定区间，计算排气温度修正值之和；和A calculation module, the calculation module is configured to call the discharge temperature correction value to modify the boundary threshold of the maintenance control condition every time the frequency reduction control condition is met again until the compressor operating frequency remains at the first set period Set the interval and calculate the sum of the discharge temperature correction values; and

确定模块，所述确定模块配置为将所述排气温度修正值之和与多个冷媒状态设定值进行比较，确定当前冷媒状态；所述冷媒状态设定值分别与充足状态、第一冷媒不足状态和第二冷媒不足状态对应。A determination module, the determination module is configured to compare the sum of the exhaust temperature correction value with a plurality of refrigerant state setting values to determine the current refrigerant state; the refrigerant state setting value is respectively compared with the sufficient state, the first refrigerant state The insufficient state corresponds to the second refrigerant insufficient state.

本发明的第三个方面提供一种空调器，应用以下的空调器控制方法：空调器控制方法，包括以下步骤：A third aspect of the present invention provides an air conditioner, using the following air conditioner control method: The air conditioner control method includes the following steps:

有益效果Beneficial effect

与现有技术相比，本发明的优点和积极效果是：Compared with prior art, advantage and positive effect of the present invention are:

本发明仅利用压缩机排气温度一个参数即可判定冷媒状态，在对压缩机进行保护的同时，自动识别出冷媒量不足的情况以及冷媒量的实际状态，所需要的数据处理量低，受空调负荷变化的干预小，具有判定精度高且实用性好的优点。The present invention can judge the state of the refrigerant by using only one parameter of the discharge temperature of the compressor. While protecting the compressor, it can automatically identify the shortage of refrigerant and the actual state of the refrigerant. The intervention of air-conditioning load changes is small, and has the advantages of high determination accuracy and good practicability.

结合附图阅读本发明的具体实施方式后，本发明的其他特点和优点将变得更加清楚。Other features and advantages of the present invention will become clearer after reading the detailed description of the present invention in conjunction with the accompanying drawings.

附图说明Description of drawings

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

图1 为本发明所提供的空调器控制方法的流程图；Fig. 1 is the flow chart of the air conditioner control method provided by the present invention;

图2为执行降频控制时的一个流程图；Fig. 2 is a flow chart when performing down-frequency control;

图3为执行降频控制时的另一个流程图；Fig. 3 is another flow chart when performing down-frequency control;

图4为执行降频控制时的另一个流程图；Fig. 4 is another flow chart when performing down-frequency control;

图5为执行降频控制时的另一个流程图；Fig. 5 is another flow chart when performing down-frequency control;

图6为本发明所提供的空调器控制装置的结构示意框图。Fig. 6 is a schematic block diagram of the structure of the air conditioner control device provided by the present invention.

本发明的实施方式Embodiments of the present invention

为了使本发明的目的、技术方案及优点更加清楚明白，以下将结合附图和实施例，对本发明作进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

本发明的说明书和权利要求书及附图中的术语“第一”、“第二”、“第三”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们的任何变形，代表覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、***、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。The terms "first", "second", and "third" in the specification, claims and drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are meant to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

在本发明中“实施例”代表结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中，各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员可以理解，本文所描述的实施例可以与其它实施例相结合。"An embodiment" in the present invention means that a specific feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. Throughout the specification, the various occurrences of this phrase are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will appreciate that the embodiments described herein can be combined with other embodiments.

基于现有技术中根据室内环境温度和盘管温度的差值进行判断，存在如果设定温差较大，在室内环境温度和设定温度接近时容易出现误判；如果设定温差较小，不容易检测且容易受到室内风机转速的影响的问题，而针对多个情况最终生成的评分值与预设的评分标准进行比较以判断冷媒是否发生泄漏，需要依赖处理器较高的数据处理能力，***整体依赖多个传感器的检测结果，鲁棒性较低的问题，如图1所示提供一种空调器控制方法。本发明所指的空调器，是将一定参数的空气送入室内（送风），同时从室内排除相应量的空气（回风）。在送风和回风的同时作用下，使室内空气保持要求的状态。送风空气由空气处理设备事先进行处理，除常见的加热、冷却之外，还可以包括附加的加湿、除湿、过滤、净化等其它处理过程。空调器采用蒸汽压缩式制冷循环，蒸汽压缩式制冷循环包括压缩机、节流装置、冷凝器、蒸发器、以及各种贮存、分离和安全保护等辅助设备；其中冷凝器的作用是将压缩机排出的高温、高压制冷剂过热蒸汽冷却及冷凝成液体，制冷剂在冷凝器中放出的热量由冷却介质（水或空气）带走，蒸发器的作用是利用液态制冷剂在低压下蒸发（沸腾），转变为蒸汽并吸收被冷却介质的热量，达到制冷目的；蒸发器是制冷***中制取冷量和输出冷量的设备；其中压缩机为变容量压缩机。空调器中设置有微处理器，微处理器依据室内负荷的大小，控制压缩机在不同转速下连续运行，实现制冷***的最佳控制。考虑到空调负荷多变量、非线性、时变的特点，正常工作状态下，现有技术中通常采用模糊控制算法、PID控制算法、模糊控制算法和PID控制算法的结合或者更精确的数学模型计算压缩机运行频率。Based on the judgment in the prior art based on the difference between the indoor ambient temperature and the coil temperature, if the set temperature difference is large, it is easy to misjudgment when the indoor ambient temperature and the set temperature are close; if the set temperature difference is small, it is not It is a problem that is easy to detect and is easily affected by the speed of the indoor fan. For multiple situations, the score value generated finally is compared with the preset score standard to judge whether the refrigerant leaks, which needs to rely on the high data processing capability of the processor. The system As a whole, it relies on the detection results of multiple sensors and has low robustness. As shown in Figure 1, an air conditioner control method is provided. The air conditioner referred to in the present invention is to send air of certain parameters into the room (air supply), and simultaneously remove a corresponding amount of air from the room (return air). Under the simultaneous action of air supply and return air, the indoor air is kept in the required state. The supply air is pre-processed by the air treatment equipment. In addition to common heating and cooling, it can also include additional humidification, dehumidification, filtration, purification and other processing processes. The air conditioner adopts a vapor compression refrigeration cycle, which includes a compressor, a throttling device, a condenser, an evaporator, and various auxiliary equipment such as storage, separation and safety protection; the function of the condenser is to turn the compressor The superheated steam of the high-temperature and high-pressure refrigerant discharged is cooled and condensed into a liquid. The heat released by the refrigerant in the condenser is taken away by the cooling medium (water or air). The function of the evaporator is to use the liquid refrigerant to evaporate at low pressure (boiling ), transforming into steam and absorbing the heat of the cooled medium to achieve the purpose of refrigeration; the evaporator is a device for producing and outputting cold capacity in the refrigeration system; the compressor is a variable capacity compressor. The air conditioner is equipped with a microprocessor, and the microprocessor controls the compressor to run continuously at different speeds according to the size of the indoor load, so as to realize the best control of the refrigeration system. Considering the multi-variable, nonlinear, and time-varying characteristics of the air-conditioning load, under normal working conditions, fuzzy control algorithms, PID control algorithms, a combination of fuzzy control algorithms and PID control algorithms, or more accurate mathematical model calculations are usually used in the prior art Compressor operating frequency.

如图1所示，本实施例提供的空调器控制方法执行以下步骤：As shown in Figure 1, the air conditioner control method provided in this embodiment performs the following steps:

步骤S11：在空调器正常启动过程中检测压缩机排气温度。Step S11: Detect the discharge temperature of the compressor during normal start-up of the air conditioner.

步骤S12：判断压缩机排气温度是否满足保持控制条件、降频控制条件或强制停机保护条件的其中一者；其中保持控制指继续根据处理器中存储的算法或者数学模型计算压缩机运行频率并保持，不对其进行主动干预；降频控制是指强制控制压缩机运行频率按照一定速率降低；强制停机保护是指控制压缩机停机。压缩机排气温度过高会使压缩机运行环境劣化，可能存在过热或过载的现象，因此设置前置的降频控制条件和强制停机保护条件以甄别是否出现上述的异常现象。Step S12: Determine whether the discharge temperature of the compressor satisfies one of the maintenance control condition, frequency reduction control condition or forced shutdown protection condition; wherein the maintenance control refers to continue to calculate the operating frequency of the compressor according to the algorithm or mathematical model stored in the processor and Maintain, no active intervention; frequency reduction control refers to the forced control of the compressor operating frequency to reduce at a certain rate; forced shutdown protection refers to the control of the compressor to stop. Excessive compressor discharge temperature will degrade the operating environment of the compressor, and there may be overheating or overloading. Therefore, pre-set frequency reduction control conditions and forced shutdown protection conditions are used to identify whether the above abnormal phenomena occur.

步骤S13：若满足则执行对压缩机的相应保持控制、降频控制或强制停机保护；即在满足降频控制条件或强制停机保护条件时，首先对压缩机运行状态进行主动干预，避免对压缩机造成不可逆的损伤。然后，进一步智能判断导致压缩机排气温度异常的原因，剔除传感器通信异常等可自动修复的微小故障带来的影响。Step S13: If it is satisfied, execute the corresponding maintenance control, frequency reduction control or forced shutdown protection of the compressor; that is, when the frequency reduction control condition or forced shutdown protection condition is met, first actively intervene in the operating state of the compressor to avoid damage to the compressor machine causing irreversible damage. Then, further intelligently judge the cause of abnormal compressor discharge temperature, and eliminate the impact of small faults that can be automatically repaired such as abnormal sensor communication.

步骤S14：记录执行降频控制的降频控制次数以及执行强制停机保护控制的保护控制次数。Step S14: Record the frequency reduction control times for executing the frequency reduction control and the protection control times for executing the forced shutdown protection control.

步骤S15：判断所记录的降频控制次数和保护控制次数中的其中任意一者是否满足排气保护条件。如果降频控制次数和保护控制次数均不满足排气保护条件，说明导致出现排气温度异常的因素已被自动修复或剔除，不进行干预，空调器正常运行；而如果降频控制次数或保护控制次数满足排气保护条件，则说明***无法自行修复相关问题。这大概率是制冷循环***中制冷剂充注量不足造成的。当制冷剂充注量不足时，即使电子膨胀阀的开度增加到最大开度，制冷剂流量也无法发生变化，蒸发器中的制冷剂蒸汽过热使得压缩机吸气温度升高，进一步导致排气温度相应增高且无法被自行修复,执行排气保护控制。Step S15: Judging whether any one of the recorded frequency reduction control times and protection control times satisfies the exhaust protection condition. If the frequency reduction control times and protection control times do not meet the exhaust protection conditions, it means that the factors causing abnormal exhaust temperature have been automatically repaired or eliminated, and the air conditioner operates normally without intervention; and if the frequency reduction control times or protection If the control times meet the exhaust protection conditions, it means that the system cannot repair related problems by itself. This is most likely caused by insufficient refrigerant charge in the refrigeration cycle system. When the refrigerant charge is insufficient, even if the opening of the electronic expansion valve is increased to the maximum opening, the refrigerant flow rate cannot change, and the overheating of the refrigerant vapor in the evaporator makes the suction temperature of the compressor rise, which further leads to discharge Exhaust gas temperature increases accordingly and cannot be repaired by itself, execute exhaust protection control.

步骤S16：执行排气保护控制时首先判断压缩机排气温度是否再次满足降频控制条件。执行排气保护的目的，第一是对压缩机进行保护，第二是确定是否真正存在制冷剂不足（制冷剂泄漏）的情况，第三是确定制冷剂不足的程度。Step S16: When performing exhaust protection control, firstly judge whether the compressor exhaust temperature meets the frequency reduction control condition again. The purpose of performing exhaust protection is firstly to protect the compressor, secondly to determine whether there is real refrigerant shortage (refrigerant leakage), and thirdly to determine the degree of refrigerant shortage.

步骤S17：如果再次满足降频控制条件，调用一次排气温度修正值修正保持控制条件的边界阈值。具体来说，排气温度修正值为负值，保持控制条件修正后的边界阈值为保持控制条件修正前的边界阈值和排气温度修正值之和。简单来说，即按照设定幅度减小保持控制条件的边界阈值，扩大保持控制条件的允许范围。Step S17: If the down-frequency control condition is satisfied again, call the exhaust gas temperature correction value once to correct the boundary threshold of the control condition. Specifically, the exhaust gas temperature correction value is a negative value, and the boundary threshold after the maintenance control condition correction is the sum of the boundary threshold value before the maintenance control condition correction and the exhaust gas temperature correction value. To put it simply, the boundary threshold of the hold control condition is reduced according to the set range, and the allowable range of the hold control condition is expanded.

步骤S18：判断压缩机运行频率是否在第一设定周期内保持在设定区间。设定区间为一个相对较小的范围，通过压缩机运行频率是否保持在设定区间衡量压缩机运行频率是否稳定；如果压缩机运行频率在第一设定周期内保持在设定区间，则说明在当前的保持控制条件下，压缩机可以维持正常运行，即在达到设定温度后保持稳定运行；从而可以确定压缩机排气压力过高是由于冷媒量不足造成的，不是压缩机自身硬件损坏造成的。第一设定周期是为了剔除空调负荷变化造成的压缩机运行频率变化的影响。如果压缩机运行频率无法在第一设定周期内保持在设定区间，则再次调用排气温度修正值修正保持控制条件的边界阈值，直至压缩机运行频率在第一设定周期内保持在设定区间。Step S18: judging whether the operating frequency of the compressor remains within the set interval within the first set period. The setting interval is a relatively small range. Whether the compressor operating frequency is kept within the setting interval is used to measure whether the compressor operating frequency is stable; if the compressor operating frequency remains within the setting interval within the first setting period, it means Under the current hold control conditions, the compressor can maintain normal operation, that is, it can maintain stable operation after reaching the set temperature; thus it can be determined that the excessive discharge pressure of the compressor is caused by insufficient refrigerant, not the hardware damage of the compressor itself Caused. The first setting period is to eliminate the influence of the change of the operating frequency of the compressor caused by the change of the air conditioner load. If the operating frequency of the compressor cannot be maintained within the set interval within the first set period, the correction value of the exhaust gas temperature is called again to correct the boundary threshold for maintaining the control condition until the operating frequency of the compressor remains within the set interval within the first set period. fixed interval.

步骤S19：如果压缩机运行频率在一次或多次修正保持控制条件后在第一设定周期内保持在设定区间，则计算所调用的全部排气温度修正值之和。Step S19: If the operating frequency of the compressor remains within the set interval within the first set period after one or more corrections to maintain the control condition, then calculate the sum of all the called discharge temperature correction values.

步骤S20：将排气温度修正值之和与多个冷媒状态设定值进行比较，确定当前冷媒状态。其中，多个冷媒状态设定值优选由本领域专业人员在实验条件下测试得到，并提前存储在微处理器供随时调用。冷媒状态设定值分别与充足状态、第一冷媒不足状态和第二冷媒不足状态对应。Step S20: Comparing the sum of the exhaust gas temperature correction value with a plurality of refrigerant state setting values to determine the current state of the refrigerant. Among them, the plurality of refrigerant state setting values are preferably obtained by testing under experimental conditions by professionals in the field, and are stored in the microprocessor in advance for recall at any time. The refrigerant state setting values correspond to the sufficient state, the first refrigerant insufficient state, and the second refrigerant insufficient state, respectively.

通过上述方法，仅利用压缩机排气温度一个参数即可以实现冷媒状态的确认，在对压缩机进行保护的同时，自动识别出冷媒量不足的情况，以及冷媒量的实际状态，所需要的数据处理量小，受到空调负荷变化的干预小、判定精度高、且实用性好。Through the above method, only one parameter of compressor discharge temperature can be used to confirm the state of the refrigerant. While protecting the compressor, it can automatically identify the shortage of refrigerant and the actual state of the refrigerant. The required data The processing capacity is small, the intervention by air-conditioning load changes is small, the judgment accuracy is high, and the practicability is good.

为实现在保护过程中对压缩机的优化控制，降频控制条件包括第一降频控制条件和第二降频控制条件。In order to realize optimal control of the compressor during the protection process, the frequency reduction control conditions include a first frequency reduction control condition and a second frequency reduction control condition.

如图2所示，步骤S12-11：判断压缩机排气温度是否满足第一降频控制条件；步骤S12-12：若满足第一降频控制条件，则控制压缩机按照第一设定降频速率降频运行。As shown in Figure 2, step S12-11: determine whether the compressor discharge temperature satisfies the first frequency reduction control condition; Frequency rate down frequency operation.

如图3所示，步骤S12-21: 判断压缩机排气温度是否满足第二降频控制条件；步骤S12-22：若满足第二降频控制条件，则控制压缩机按照第二设定降频速率降频运行。As shown in Figure 3, step S12-21: determine whether the discharge temperature of the compressor satisfies the second frequency reduction control condition; Frequency rate down frequency operation.

其中，第一降频速率小于第二降频速率。具体来说，第一设定降频速对应慢速降频，第二设定降频速率对应快速降频。在一些精确性要求更高的控制场景中，可以选择记录执行快速降频控制次数以及执行强制停机保护控制的保护控制次数，并依此作为执行排气保护控制的条件。Wherein, the first frequency reduction rate is smaller than the second frequency reduction rate. Specifically, the first set frequency reduction speed corresponds to slow frequency reduction, and the second set frequency reduction rate corresponds to fast frequency reduction. In some control scenarios that require higher precision, you can choose to record the number of times of rapid frequency reduction control and the number of times of protection control that executes forced shutdown protection control, and use this as the condition for executing exhaust protection control.

如图4和图5所示，在执行降频控制过程中包括以下步骤。As shown in FIG. 4 and FIG. 5 , the following steps are included in the frequency reduction control process.

步骤S12-31：判断压缩机排气温度是否满足第一频率保护条件；Step S12-31: judging whether the discharge temperature of the compressor meets the first frequency protection condition;

步骤S12-32：若满足第一频率保护条件，则禁止压缩机频率下降，只允许压缩机频率上升。Step S12-32: If the first frequency protection condition is satisfied, the frequency of the compressor is prohibited from decreasing, and only the frequency of the compressor is allowed to increase.

步骤S12-41：判断压缩机排气温度是否满足第二频率保护条件；Step S12-41: judging whether the discharge temperature of the compressor meets the second frequency protection condition;

步骤S12-42：若满足第二频率保护条件，则控制压缩机频率按照第一设定升频速率上升。Step S12-42: If the second frequency protection condition is met, control the frequency of the compressor to increase according to the first set frequency increase rate.

通过上述过程避免在排气保护控制时过多牺牲空调器性能，导致用户体验下降过多。Through the above process, it is avoided to sacrifice the performance of the air conditioner too much during exhaust protection control, resulting in too much degradation of user experience.

其中保持控制条件、第一降频控制条件、第二降频控制条件和强制停机保护条件的下限边界阈值依次递增。假定保持控制条件的下限边界阈值记作A、第一降频控制条件的下限边界阈值记作B、第二降频控制条件的下限边界阈值记作C、强制停机保护条件的下限边界阈值D，对应有压缩机排气温度大于等于A且小于B，满足保持控制条件；压缩机排气温度大于等于B且小于C，满足第一降频控制条件；压缩机排气温度大于等于C且小于D，满足第二降频控制条件；压缩机排气温度大于等于D，满足强制停机保护条件。保持控制条件修正后的边界阈值为保持控制条件修正前的下限边界阈值A和排气温度修正值之和。 Wherein, the lower boundary thresholds of the maintenance control condition, the first frequency reduction control condition, the second frequency reduction control condition and the forced shutdown protection condition increase sequentially. Assuming that the lower boundary threshold of the maintenance control condition is denoted as A, the lower boundary threshold of the first frequency reduction control condition is denoted as B, the lower boundary threshold of the second frequency reduction control condition is denoted as C, and the lower boundary threshold of the forced shutdown protection condition is D, Correspondingly, if the discharge temperature of the compressor is greater than or equal to A and less than B, the maintenance control condition is met; the discharge temperature of the compressor is greater than or equal to B and less than C, and the first frequency reduction control condition is met; the discharge temperature of the compressor is greater than or equal to C and less than D , satisfying the second down-frequency control condition; the discharge temperature of the compressor is greater than or equal to D, satisfying the forced shutdown protection condition. The boundary threshold after the maintenance control condition correction is the sum of the lower limit boundary threshold value A before the maintenance control condition correction and the exhaust gas temperature correction value.

在执行降频控制过程中，若压缩机排气温度下降至小于等于第一频率保护条件的上限边界阈值F，则满足第一频率保护条件，禁止压缩机频率下降；若压缩机排气温度下降至小于等于第二频率保护条件的上限边界阈值E，则满足第二频率保护条件，控制压缩机频率按照第一设定升频速率上升。第一频率保护条件的上限边界阈值F和第二频率保护条件的上限边界阈值E满足E＜A＜F＜B＜C＜D。排气温度修正值优选设定为-1℃，即保持控制条件修正前的下限边界阈值A单次下降1℃。In the process of frequency reduction control, if the compressor discharge temperature drops to less than or equal to the upper boundary threshold F of the first frequency protection condition, the first frequency protection condition is met, and the compressor frequency is prohibited from dropping; if the compressor discharge temperature drops When it is less than or equal to the upper boundary threshold E of the second frequency protection condition, the second frequency protection condition is met, and the compressor frequency is controlled to increase according to the first set frequency increase rate. The upper boundary threshold F of the first frequency protection condition and the upper boundary threshold E of the second frequency protection condition satisfy E<A<F<B<C<D. The correction value of the exhaust gas temperature is preferably set to -1°C, that is, the lower boundary threshold value A before the correction of the control condition is maintained for a single drop of 1°C.

将排气温度修正值之和与多个冷媒状态设定值进行比较，确定当前冷媒状态具体包括以下过程：如果排气温度修正值之和小于第一冷媒状态设定值，则当前冷媒状态为较充足状态。这个较充足状态可理解为冷媒状态略少，但暂时可以保证安全运行，不用主动干预。如果排气温度修正值之和小于第二冷媒状态设定值且大于第一冷媒状态设定值，则当前冷媒状态为第一冷媒不足状态。如果排气温度修正值之和大于第二冷媒状态设定值，则当前冷媒状态为第二冷媒不足状态。其中第二冷媒不足状态的冷媒不足量大于第一冷媒不足状态的冷媒不足量，例如第一冷媒不足状态对应为标注量的80%，第二冷媒不足状态对应为标注量的60%。当确定为较充足状态，***可以通过绿色指示灯指示；当第一冷媒不足状态时，***可以通过黄色指示灯指示；当确定为第二冷媒不足状态时，***可以通过红色指示灯指示，提醒用户及时添加冷媒。Comparing the sum of exhaust temperature correction values with multiple refrigerant state setting values, determining the current refrigerant state specifically includes the following process: If the sum of exhaust gas temperature correction values is less than the first refrigerant state setting value, the current refrigerant state is more adequate state. This relatively sufficient state can be understood as a slightly less refrigerant state, but it can temporarily guarantee safe operation without active intervention. If the sum of the exhaust gas temperature correction values is less than the second refrigerant state set value and greater than the first refrigerant state set value, the current refrigerant state is the first refrigerant insufficient state. If the sum of the exhaust gas temperature correction values is greater than the second refrigerant state setting value, the current refrigerant state is the second refrigerant insufficient state. The insufficient amount of refrigerant in the second insufficient state of refrigerant is greater than the insufficient amount of refrigerant in the first state of insufficient refrigerant. For example, the first state of insufficient refrigerant corresponds to 80% of the marked amount, and the second state of insufficient refrigerant corresponds to 60% of the marked amount. When it is determined to be in a relatively sufficient state, the system can indicate through the green indicator light; when the first refrigerant is insufficient, the system can indicate through the yellow indicator light; when it is determined that the second refrigerant is insufficient, the system can indicate through the red indicator light to remind Users add refrigerant in time.

本发明的第二个方面提供一种空调器控制装置。如图6所示，空调器控制装置包括以下组成部分。A second aspect of the present invention provides an air conditioner control device. As shown in Figure 6, the air conditioner control device includes the following components.

采样模块11，采样模块11配置为在空调器正常启动过程中检测压缩机排气温度。The sampling module 11, the sampling module 11 is configured to detect the discharge temperature of the compressor during the normal start-up process of the air conditioner.

第一判定模块12，第一判定模块12配置为判断压缩机排气温度是否满足保持控制条件、降频控制条件或强制停机保护条件中的其中任意一者。其中保持控制指继续根据处理器中存储的算法或者数学模型计算压缩机运行频率并保持，不对其进行主动干预；降频控制是指强制控制压缩机运行频率按照一定速率降低；强制停机保护是指控制压缩机停机。压缩机排气温度过高会使压缩机运行环境劣化，可能存在过热或过载的现象，因此设置前置的降频控制条件和强制停机保护条件以甄别是否出现上述的异常现象。The first judging module 12, the first judging module 12 is configured to judge whether the discharge temperature of the compressor satisfies any one of the maintenance control condition, frequency reduction control condition or forced shutdown protection condition. Among them, the maintenance control refers to continue to calculate and maintain the operating frequency of the compressor according to the algorithm or mathematical model stored in the processor, without active intervention; the frequency reduction control refers to the forced control of the compressor operating frequency to decrease at a certain rate; the forced shutdown protection refers to Control compressor shutdown. Excessive compressor discharge temperature will degrade the operating environment of the compressor, and there may be overheating or overloading. Therefore, pre-set frequency reduction control conditions and forced shutdown protection conditions are used to identify whether the above abnormal phenomena occur.

第一执行模块13，第一执行模块13配置为在压缩机排气温度满足保持控制条件、降频控制条件或强制停机保护条件中的其中任意一者时，执行对压缩机相应的保持控制、降频控制或强制停机保护。即在满足降频控制条件或强制停机保护条件时，首先对压缩机运行状态进行主动干预，避免对压缩机造成不可逆的损伤。然后，进一步智能判断导致压缩机排气温度异常的原因，剔除传感器通信异常等可自动修复的微小故障带来的影响。The first execution module 13, the first execution module 13 is configured to execute the corresponding maintenance control, Frequency reduction control or forced shutdown protection. That is, when the frequency reduction control condition or the forced shutdown protection condition is met, the operating state of the compressor is actively intervened first to avoid irreversible damage to the compressor. Then, further intelligently judge the cause of abnormal compressor discharge temperature, and eliminate the impact of small faults that can be automatically repaired such as abnormal sensor communication.

记录模块14，记录模块14配置为记录执行降频控制的降频控制次数以及执行强制停机保护控制的保护控制次数。A recording module 14, the recording module 14 is configured to record the frequency reduction control times for performing the frequency reduction control and the protection control times for performing the forced shutdown protection control.

第二执行模块15，第二执行模块15配置为在降频控制次数和保护控制次数中的其中一者满足排气保护条件时执行排气保护控制。如果降频控制次数和保护控制次数均不满足排气保护条件，说明导致出现排气温度异常的因素已被自动修复或剔除，不进行干预，空调器正常运行；而如果降频控制次数或保护控制次数满足排气保护条件，则说明***无法自行修复相关问题。这大概率是制冷循环***中制冷剂充注量不足造成的。当制冷剂充注量不足时，即使电子膨胀阀的开度增加到最大开度，制冷剂流量也无法发生变化，蒸发器中的制冷剂蒸汽过热使得压缩机吸气温度升高，进一步导致排气温度相应增高且无法被自行修复,执行排气保护控制。The second execution module 15, the second execution module 15 is configured to execute the exhaust protection control when one of the frequency reduction control times and the protection control times satisfies the exhaust protection conditions. If the frequency reduction control times and protection control times do not meet the exhaust protection conditions, it means that the factors causing abnormal exhaust temperature have been automatically repaired or eliminated, and the air conditioner operates normally without intervention; and if the frequency reduction control times or protection If the control times meet the exhaust protection conditions, it means that the system cannot repair related problems by itself. This is most likely caused by insufficient refrigerant charge in the refrigeration cycle system. When the refrigerant charge is insufficient, even if the opening of the electronic expansion valve is increased to the maximum opening, the refrigerant flow rate cannot change, and the overheating of the refrigerant vapor in the evaporator makes the suction temperature of the compressor rise, which further leads to discharge Exhaust gas temperature increases accordingly and cannot be repaired by itself, execute exhaust protection control.

第二判定模块16，第二判定模块16配置为在执行排气保护控制时判断压缩机排气温度是否再次满足降频控制条件。执行排气保护的目的，第一是对压缩机进行保护，第二是确定是否真正存在制冷剂不足（制冷剂泄漏）的情况，第三是确定制冷剂不足的程度。The second judging module 16, the second judging module 16 is configured to judge whether the discharge temperature of the compressor satisfies the frequency reduction control condition again when the discharge protection control is executed. The purpose of performing exhaust protection is firstly to protect the compressor, secondly to determine whether there is real refrigerant shortage (refrigerant leakage), and thirdly to determine the degree of refrigerant shortage.

计算模块17，计算模块17配置为在每次再次满足降频控制条件时，调用一次排气温度修正值修正保持控制条件的边界阈值直至压缩机运行频率在第一设定周期内保持在设定区间，计算排气温度修正值之和。具体来说，排气温度修正值为负值，保持控制条件修正后的边界阈值为保持控制条件修正前的边界阈值和排气温度修正值之和。简单来说，即按照设定幅度减小保持控制条件的边界阈值，扩大保持控制条件的允许范围。设定区间为一个相对较小的范围，通过压缩机运行频率是否保持在设定区间衡量压缩机运行频率是否稳定；如果压缩机运行频率在第一设定周期内保持在设定区间，则说明在当前的保持控制条件下，压缩机可以维持正常运行，即在达到设定温度后保持稳定运行；从而可以确定压缩机排气压力过高是由于冷媒量不足造成的，不是压缩机自身硬件损坏造成的。第一设定周期是为了剔除空调负荷变化造成的压缩机运行频率变化的影响。如果压缩机运行频率无法在第一设定周期内保持在设定区间，则再次调用排气温度修正值修正保持控制条件的边界阈值，直至压缩机运行频率在第一设定周期内保持在设定区间。Calculation module 17, the calculation module 17 is configured to call the exhaust gas temperature correction value once again to modify the boundary threshold value of the control condition until the operating frequency of the compressor remains at the set value within the first set period every time the frequency reduction control condition is met again. interval, calculate the sum of exhaust temperature correction values. Specifically, the exhaust gas temperature correction value is a negative value, and the boundary threshold after the maintenance control condition correction is the sum of the boundary threshold value before the maintenance control condition correction and the exhaust gas temperature correction value. To put it simply, the boundary threshold of the hold control condition is reduced according to the set range, and the allowable range of the hold control condition is expanded. The setting interval is a relatively small range. Whether the compressor operating frequency is kept within the setting interval is used to measure whether the compressor operating frequency is stable; if the compressor operating frequency remains within the setting interval within the first setting period, it means Under the current hold control conditions, the compressor can maintain normal operation, that is, it can maintain stable operation after reaching the set temperature; thus it can be determined that the excessive discharge pressure of the compressor is caused by insufficient refrigerant, not the hardware damage of the compressor itself Caused. The first setting period is to eliminate the influence of the change of the operating frequency of the compressor caused by the change of the air conditioner load. If the operating frequency of the compressor cannot be maintained within the set interval within the first set period, the correction value of the exhaust gas temperature is called again to correct the boundary threshold for maintaining the control condition until the operating frequency of the compressor remains within the set interval within the first set period. fixed interval.

确定模块18，确定模块18配置为将排气温度修正值之和与多个冷媒状态设定值进行比较，确定当前冷媒状态；冷媒状态设定值分别与充足状态、第一冷媒不足状态和第二冷媒不足状态对应。其中，多个冷媒状态设定值优选由本领域专业人员在实验条件下测试得到，并提前存储在微处理器供随时调用。冷媒状态设定值分别与充足状态、第一冷媒不足状态和第二冷媒不足状态对应。Determination module 18, the determination module 18 is configured to compare the sum of the exhaust gas temperature correction value with a plurality of refrigerant state setting values to determine the current refrigerant state; 2 Corresponding to insufficient refrigerant state. Among them, the plurality of refrigerant state setting values are preferably obtained by testing under experimental conditions by professionals in the field, and are stored in the microprocessor in advance for recall at any time. The refrigerant state setting values correspond to the sufficient state, the first refrigerant insufficient state, and the second refrigerant insufficient state, respectively.

上述控制装置仅利用压缩机排气温度即可以实现冷媒状态的确认，在对压缩机进行保护的同时，自动精确识别出冷媒量不足的情况。The above-mentioned control device can realize the confirmation of the state of the refrigerant only by using the discharge temperature of the compressor. While protecting the compressor, it can automatically and accurately identify the situation that the amount of refrigerant is insufficient.

具体来说，降频控制条件包括：第一降频控制条件和第二降频控制条件；Specifically, the frequency reduction control conditions include: a first frequency reduction control condition and a second frequency reduction control condition;

第一执行模块配置为在压缩机排气温度满足第一降频控制条件时，控制压缩机按照第一设定降频速率降频运行；在压缩机排气温度满足第二降频控制条件时，控制压缩机按照第二设定降频速率降频运行；The first execution module is configured to control the compressor to operate at a frequency reduction at the first set frequency reduction rate when the discharge temperature of the compressor meets the first frequency reduction control condition; when the discharge temperature of the compressor meets the second frequency reduction control condition , to control the compressor to run at a reduced frequency according to the second set frequency reduction rate;

其中第一降频速率小于第二降频速率。具体来说，第一设定降频速对应慢速降频，第二设定降频速率对应快速降频。在一些精确性要求更高的控制场景中，可以选择记录执行快速降频控制次数以及执行强制停机保护控制的保护控制次数，并依此作为执行排气保护控制的条件。Wherein the first frequency reduction rate is smaller than the second frequency reduction rate. Specifically, the first set frequency reduction speed corresponds to slow frequency reduction, and the second set frequency reduction rate corresponds to fast frequency reduction. In some control scenarios that require higher precision, you can choose to record the number of times of rapid frequency reduction control and the number of times of protection control that executes forced shutdown protection control, and use this as the condition for executing exhaust protection control.

假定保持控制条件的下限边界阈值记作A、第一降频控制条件的下限边界阈值记作B、第二降频控制条件的下限边界阈值记作C、强制停机保护条件的下限边界阈值D，对应有压缩机排气温度大于等于A且小于B，满足保持控制条件；压缩机排气温度大于等于B且小于C，满足第一降频控制条件；压缩机排气温度大于等于C且小于D，满足第二降频控制条件；压缩机排气温度大于等于D，满足强制停机保护条件。保持控制条件修正后的边界阈值为保持控制条件修正前的下限边界阈值A和排气温度修正值之和。Assuming that the lower boundary threshold of the maintenance control condition is denoted as A, the lower boundary threshold of the first frequency reduction control condition is denoted as B, the lower boundary threshold of the second frequency reduction control condition is denoted as C, and the lower boundary threshold of the forced shutdown protection condition is D, Correspondingly, if the discharge temperature of the compressor is greater than or equal to A and less than B, the maintenance control condition is met; the discharge temperature of the compressor is greater than or equal to B and less than C, and the first frequency reduction control condition is met; the discharge temperature of the compressor is greater than or equal to C and less than D , satisfying the second down-frequency control condition; the discharge temperature of the compressor is greater than or equal to D, satisfying the forced shutdown protection condition. The boundary threshold after the maintenance control condition correction is the sum of the lower limit boundary threshold value A before the maintenance control condition correction and the exhaust gas temperature correction value.

为了避免牺牲过多的空调性能，在执行降频控制过程中，第一执行模块配置为在压缩机排气温度满足第一频率保护条件时禁止压缩机频率下降；在压缩机排气温度满足第二频率保护条件时控制压缩机频率按照第一设定升频速率上升。若压缩机排气温度下降至小于等于第一频率保护条件的上限边界阈值F，则满足第一频率保护条件，禁止压缩机频率下降；若压缩机排气温度下降至小于等于第二频率保护条件的上限边界阈值E，则满足第二频率保护条件，控制压缩机频率按照第一设定升频速率上升。第一频率保护条件的上限边界阈值F和第二频率保护条件的上限边界阈值E满足E＜A＜F＜B＜C＜D。排气温度修正值优选设定为-1℃，即保持控制条件修正前的下限边界阈值A单次下降1℃。In order to avoid sacrificing too much air-conditioning performance, during the frequency reduction control process, the first execution module is configured to forbid the frequency of the compressor to drop when the discharge temperature of the compressor meets the first frequency protection condition; In the second frequency protection condition, the frequency of the compressor is controlled to increase according to the first set frequency increase rate. If the compressor discharge temperature drops to less than or equal to the upper boundary threshold F of the first frequency protection condition, the first frequency protection condition is met, and the frequency of the compressor is forbidden to drop; if the compressor discharge temperature drops to less than or equal to the second frequency protection condition The upper boundary threshold E of the upper limit threshold E meets the second frequency protection condition, and the frequency of the compressor is controlled to increase according to the first set frequency increase rate. The upper boundary threshold F of the first frequency protection condition and the upper boundary threshold E of the second frequency protection condition satisfy E<A<F<B<C<D. The correction value of the exhaust gas temperature is preferably set to -1°C, that is, the lower boundary threshold value A before the correction of the control condition is maintained for a single drop of 1°C.

确定模块具体配置为：在排气温度修正值之和小于第一冷媒状态设定值时，确定当前冷媒状态为较充足状态；在排气温度修正值之和小于第二冷媒状态设定值且大于第一冷媒状态设定值时，确定当前冷媒状态为第一冷媒不足状态；在排气温度修正值之和大于第二冷媒状态设定值时，确定当前冷媒状态为第二冷媒不足状态；其中，第二冷媒不足状态的冷媒不足量大于第一冷媒不足状态的冷媒不足量。较充足状态可理解为冷媒状态略少，但暂时可以保证安全运行，不用主动干预。示例性的，第一冷媒不足状态可以对应为标注量的80%，第二冷媒不足状态对应为标注量的60%。当确定为较充足状态，***可以通过绿色指示灯指示；当第一冷媒不足状态时，***可以通过黄色指示灯指示；当确定为第二冷媒不足状态时，***可以通过红色指示灯指示，提醒用户及时添加冷媒。The determination module is specifically configured to: determine that the current refrigerant state is a relatively sufficient state when the sum of exhaust temperature correction values is less than the first refrigerant state set value; When it is greater than the first refrigerant state setting value, determine that the current refrigerant state is the first refrigerant insufficient state; when the sum of the exhaust temperature correction values is greater than the second refrigerant state setting value, determine that the current refrigerant state is the second refrigerant insufficient state; Wherein, the insufficient amount of refrigerant in the second insufficient refrigerant state is greater than the insufficient amount of refrigerant in the first insufficient refrigerant state. A relatively sufficient state can be understood as a slightly less refrigerant state, but it can temporarily guarantee safe operation without active intervention. Exemplarily, the first refrigerant insufficient state may correspond to 80% of the marked amount, and the second refrigerant insufficient state may correspond to 60% of the marked amount. When it is determined to be in a relatively sufficient state, the system can indicate through the green indicator light; when the first refrigerant is insufficient, the system can indicate through the yellow indicator light; when it is determined that the second refrigerant is insufficient, the system can indicate through the red indicator light to remind Users add refrigerant in time.

本申请实施例还提供一种空调器，应用上述空调器控制方法。空调器控制方法的具体步骤参见上述实施例的详细描述和说明书附图的详细描绘。在此不再赘述，采用上述空调器控制方法的空调器可以实现同样的技术效果。An embodiment of the present application further provides an air conditioner, using the above air conditioner control method. For the specific steps of the air conditioner control method, refer to the detailed description of the above embodiments and the detailed description of the drawings in the specification. No more details are given here, the air conditioner adopting the above air conditioner control method can achieve the same technical effect.

本申请实施例还提供一种计算机存储介质，其中，该计算机存储介质存储于电子数据交换的计算机程序，该计算机程序使得空调器执行如上方法实施例中记载的任一方法的部分或全部步骤。The embodiment of the present application also provides a computer storage medium, wherein the computer storage medium is stored in a computer program for electronic data exchange, and the computer program enables the air conditioner to perform some or all steps of any method described in the above method embodiments.

在上述实施例中，对各个实施例的描述均各有侧重，某个实施例中没有详述的部分，可以参见其它实施例的相关描述。In the above-mentioned embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

在本申请所提供的几个实施例中，应该理解到，所揭露的装置，可通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如上述单元或模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，可以是电性或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the above-mentioned units or modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

上述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个物理空间，或者也可以分布到多个网络单元上，可以根据实际需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one physical space, or may be distributed to multiple network units, Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

以上实施例仅用以说明本发明的技术方案，而非对其进行限制；尽管参照前述实施例对本发明进行了详细的说明，对于本领域的普通技术人员来说，依然可以对前述实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或替换，并不使相应技术方案的本质脱离本发明所要求保护的技术方案的精神和范围。The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art can still understand the foregoing embodiments. Modifications are made to the technical solutions described, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed in the present invention.

Claims

一种空调器控制方法，其特征在于，包括以下步骤：A method for controlling an air conditioner, comprising the steps of:

在空调器正常启动过程中检测压缩机排气温度；Detect the compressor discharge temperature during the normal start-up process of the air conditioner;

判断所述压缩机排气温度是否满足保持控制条件、降频控制条件或强制停机保护条件中的其中任意一者；若满足，则执行对压缩机相应的保持控制、降频控制或强制停机保护；Judging whether the discharge temperature of the compressor satisfies any one of the maintenance control condition, frequency reduction control condition or forced shutdown protection condition; if it is satisfied, then execute the corresponding maintenance control, frequency reduction control or forced shutdown protection of the compressor ;

记录执行所述降频控制的降频控制次数以及执行强制停机保护控制的保护控制次数；如果所述降频控制次数和所述保护控制次数中的其中一者满足排气保护条件，则执行排气保护控制； Record the frequency reduction control times for performing the frequency reduction control and the protection control times for the forced shutdown protection control; if one of the frequency reduction control times and the protection control times meets the exhaust protection condition, execute exhaust Gas protection control;

执行所述排气保护控制时：判断所述压缩机排气温度是否再次满足降频控制条件，并在每次再次满足降频控制条件时，调用一次排气温度修正值修正所述保持控制条件的边界阈值直至压缩机运行频率在第一设定周期内保持在设定区间，计算排气温度修正值之和；When executing the exhaust protection control: judging whether the compressor discharge temperature satisfies the frequency reduction control condition again, and each time the frequency reduction control condition is satisfied again, call a discharge temperature correction value to correct the maintenance control condition Calculate the sum of the exhaust temperature correction values until the operating frequency of the compressor remains within the set interval within the first set cycle;

将所述排气温度修正值之和与多个冷媒状态设定值进行比较，确定当前冷媒状态；所述冷媒状态设定值分别与充足状态、第一冷媒不足状态和第二冷媒不足状态对应。Comparing the sum of the exhaust gas temperature correction value with multiple refrigerant state setting values to determine the current refrigerant state; the refrigerant state setting values correspond to the sufficient state, the first refrigerant insufficient state and the second refrigerant insufficient state respectively .
根据权利要求1所述的空调器控制方法，其特征在于，The air conditioner control method according to claim 1, characterized in that,

所述降频控制条件包括：第一降频控制条件和第二降频控制条件；The frequency reduction control conditions include: a first frequency reduction control condition and a second frequency reduction control condition;

若所述压缩机排气温度满足第一降频控制条件，则控制压缩机按照第一设定降频速率降频运行；若所述压缩机排气温度满足第二降频控制条件，则控制压缩机按照第二设定降频速率降频运行；所述第一降频速率小于所述第二降频速率。If the discharge temperature of the compressor satisfies the first frequency reduction control condition, the compressor is controlled to operate at a frequency reduction according to the first set frequency reduction rate; if the compressor discharge temperature meets the second frequency reduction control condition, the control The compressor runs at reduced frequency according to a second set frequency reduction rate; the first frequency reduction rate is smaller than the second frequency reduction rate.
根据权利要求2所述的空调器控制方法，其特征在于，The air conditioner control method according to claim 2, wherein:

在执行降频控制过程中，若所述压缩机排气温度满足第一频率保护条件，则禁止压缩机频率下降；若所述压缩机排气温度满足第二频率保护条件，则控制压缩机频率按照第一设定升频速率上升。In the process of frequency reduction control, if the compressor discharge temperature meets the first frequency protection condition, the frequency of the compressor is prohibited from decreasing; if the compressor discharge temperature meets the second frequency protection condition, the compressor frequency is controlled Increase according to the first set up frequency rate.
根据权利要求2所述的空调器控制方法，其特征在于，The air conditioner control method according to claim 2, wherein:

所述保持控制条件、第一降频控制条件、第二降频控制条件和强制停机保护条件的下限边界阈值依次递增；The lower boundary thresholds of the maintenance control condition, the first frequency reduction control condition, the second frequency reduction control condition and the forced shutdown protection condition are sequentially increased;

所述排气温度修正值为负值，保持控制条件修正后的边界阈值为保持控制条件修正前的边界阈值和排气温度修正值之和。The exhaust gas temperature correction value is a negative value, and the boundary threshold after the maintenance control condition correction is the sum of the boundary threshold value before the maintenance control condition correction and the exhaust gas temperature correction value.
根据权利要求1所述的空调器控制方法，其特征在于，The air conditioner control method according to claim 1, characterized in that,

将所述排气温度修正值之和与多个冷媒状态设定值进行比较，确定当前冷媒状态包括：Comparing the sum of the exhaust temperature correction value with multiple refrigerant state set values, determining the current refrigerant state includes:

如果所述排气温度修正值之和小于第一冷媒状态设定值，则当前冷媒状态为较充足状态；If the sum of the exhaust gas temperature correction values is less than the first refrigerant state setting value, the current refrigerant state is relatively sufficient;

如果所述排气温度修正值之和小于第二冷媒状态设定值且大于第一冷媒状态设定值，则当前冷媒状态为第一冷媒不足状态；If the sum of the exhaust gas temperature correction values is less than the second refrigerant state set value and greater than the first refrigerant state set value, the current refrigerant state is the first refrigerant insufficient state;

如果所述排气温度修正值之和大于第二冷媒状态设定值，则当前冷媒状态为第二冷媒不足状态；If the sum of the exhaust gas temperature correction values is greater than the second refrigerant state setting value, the current refrigerant state is the second refrigerant insufficient state;

其中所述第二冷媒不足状态的冷媒不足量大于所述第一冷媒不足状态的冷媒不足量。Wherein, the insufficient amount of refrigerant in the second insufficient refrigerant state is greater than the insufficient amount of refrigerant in the first insufficient refrigerant state.
一种空调器控制装置，其特征在于，包括：An air conditioner control device, characterized in that it comprises:

采样模块，所述采样模块配置为在空调器正常启动过程中检测压缩机排气温度；A sampling module, the sampling module is configured to detect the discharge temperature of the compressor during the normal start-up process of the air conditioner;

第一判定模块，所述第一判定模块配置为判断所述压缩机排气温度是否满足保持控制条件、降频控制条件或强制停机保护条件中的其中任意一者；A first judging module, the first judging module is configured to judge whether the discharge temperature of the compressor satisfies any one of the maintenance control condition, frequency reduction control condition or forced shutdown protection condition;

第一执行模块，所述第一执行模块配置为在所述压缩机排气温度满足保持控制条件、降频控制条件或强制停机保护条件中的其中任意一者时，执行对压缩机相应的保持控制、降频控制或强制停机保护；A first execution module, the first execution module is configured to execute corresponding maintenance of the compressor when the discharge temperature of the compressor satisfies any one of the maintenance control condition, frequency reduction control condition or forced shutdown protection condition Control, frequency reduction control or forced shutdown protection;

记录模块，所述记录模块配置为记录执行所述降频控制的降频控制次数以及执行强制停机保护控制的保护控制次数；A recording module, the recording module is configured to record the frequency reduction control times for performing the frequency reduction control and the protection control times for performing the forced shutdown protection control;

第二执行模块，所述第二执行模块配置为在所述降频控制次数和所述保护控制次数中的其中一者满足排气保护条件时执行排气保护控制；A second execution module, the second execution module is configured to execute exhaust protection control when one of the frequency reduction control times and the protection control times meets exhaust protection conditions;

第二判定模块，所述第二判定模块配置为在执行排气保护控制时判断所述压缩机排气温度是否再次满足降频控制条件；A second judging module, the second judging module is configured to judge whether the exhaust gas temperature of the compressor satisfies the frequency reduction control condition again when the exhaust protection control is executed;

计算模块，所述计算模块配置为在每次再次满足降频控制条件时，调用一次排气温度修正值修正所述保持控制条件的边界阈值直至压缩机运行频率在第一设定周期内保持在设定区间，计算排气温度修正值之和；和A calculation module, the calculation module is configured to call the discharge temperature correction value to modify the boundary threshold of the maintenance control condition every time the frequency reduction control condition is met again until the compressor operating frequency remains at the first set period Set the interval and calculate the sum of the discharge temperature correction values; and

确定模块，所述确定模块配置为将所述排气温度修正值之和与多个冷媒状态设定值进行比较，确定当前冷媒状态；所述冷媒状态设定值分别与充足状态、第一冷媒不足状态和第二冷媒不足状态对应。A determination module, the determination module is configured to compare the sum of the exhaust temperature correction value with a plurality of refrigerant state setting values to determine the current refrigerant state; the refrigerant state setting value is respectively compared with the sufficient state, the first refrigerant state The insufficient state corresponds to the second refrigerant insufficient state.
根据权利要求6所述的空调器控制装置，其特征在于，The air conditioner control device according to claim 6, wherein:

所述降频控制条件包括：第一降频控制条件和第二降频控制条件；The frequency reduction control conditions include: a first frequency reduction control condition and a second frequency reduction control condition;

所述第一执行模块配置为在所述压缩机排气温度满足第一降频控制条件时，控制压缩机按照第一设定降频速率降频运行；在所述压缩机排气温度满足第二降频控制条件时，控制压缩机按照第二设定降频速率降频运行；The first execution module is configured to control the compressor to run at a first set frequency reduction rate when the discharge temperature of the compressor meets the first frequency reduction control condition; Under the second frequency reduction control condition, the compressor is controlled to operate at the frequency reduction at the second set frequency reduction rate;

其中所述第一降频速率小于所述第二降频速率；所述保持控制条件、第一降频控制条件、第二降频控制条件和强制停机保护条件的边界阈值依次递增。Wherein the first frequency reduction rate is smaller than the second frequency reduction rate; the boundary thresholds of the maintenance control condition, the first frequency reduction control condition, the second frequency reduction control condition and the forced shutdown protection condition increase sequentially.
根据权利要求7所述的空调器控制装置，其特征在于，The air conditioner control device according to claim 7, wherein:

在执行降频控制过程中，所述第一执行模块配置为在所述压缩机排气温度满足第一频率保护条件时禁止压缩机频率下降；在所述压缩机排气温度满足第二频率保护条件时控制压缩机频率按照第一设定升频速率上升。In the process of frequency reduction control, the first execution module is configured to prohibit the frequency reduction of the compressor when the discharge temperature of the compressor meets the first frequency protection condition; when the discharge temperature of the compressor meets the second frequency protection condition When the conditions are met, the frequency of the compressor is controlled to increase according to the first set frequency increase rate.
根据权利要求6所述的空调器控制装置，其特征在于，The air conditioner control device according to claim 6, wherein:

所述确定模块配置为：The determination module is configured as:

在所述排气温度修正值之和小于第一冷媒状态设定值时，确定当前冷媒状态为较充足状态；When the sum of the exhaust gas temperature correction values is less than the first refrigerant state setting value, it is determined that the current state of the refrigerant is relatively sufficient;

在所述排气温度修正值之和小于第二冷媒状态设定值且大于第一冷媒状态设定值时，确定当前冷媒状态为第一冷媒不足状态；When the sum of the exhaust gas temperature correction values is less than the second refrigerant state set value and greater than the first refrigerant state set value, it is determined that the current refrigerant state is the first refrigerant insufficient state;

在所述排气温度修正值之和大于第二冷媒状态设定值时，确定当前冷媒状态为第二冷媒不足状态；When the sum of the exhaust gas temperature correction values is greater than the second refrigerant state setting value, it is determined that the current refrigerant state is the second refrigerant insufficient state;

其中，所述第二冷媒不足状态的冷媒不足量大于所述第一冷媒不足状态的冷媒不足量。Wherein, the insufficient amount of refrigerant in the second insufficient refrigerant state is greater than the insufficient amount of refrigerant in the first insufficient refrigerant state.
一种空调器，其特征在于，应用权利要求1至5任一项所述的空调器控制方法。An air conditioner, characterized in that the air conditioner control method described in any one of claims 1 to 5 is applied.