CN108800438A - Air conditioner inhibits frosting control method - Google Patents
Air conditioner inhibits frosting control method Download PDFInfo
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- CN108800438A CN108800438A CN201810509883.7A CN201810509883A CN108800438A CN 108800438 A CN108800438 A CN 108800438A CN 201810509883 A CN201810509883 A CN 201810509883A CN 108800438 A CN108800438 A CN 108800438A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
本发明属于空调器技术领域，具体涉及一种空调器抑制结霜控制方法。为了实现空调器抑制结霜的目的，本发明提出的空调器抑制结霜控制方法包括下列步骤：在空调器制热运行的过程中，获取室内环境温度；计算差值pn＝预设温度－室内环境温度；如果pn＜预设值，则获取室外盘管的温度，并计算差值D＝结霜温度－室外盘管温度；根据所述差值D选择性地控制压缩机的运行频率，以使所述差值D小于设定值。本发明通过比较预设温度和室内环境温度的差值pn，在pn＜预设值的情况下，再通过控制压缩机的运行频率，从而既能够保证空调器开机制热的效率，也能够起到抑制结霜的目的。
The invention belongs to the technical field of air conditioners, and in particular relates to a control method for suppressing frost formation of an air conditioner. In order to achieve the purpose of suppressing frosting of the air conditioner, the control method for suppressing frosting of the air conditioner proposed by the present invention includes the following steps: during the heating operation of the air conditioner, obtain the indoor ambient temperature; calculate the difference pn=preset temperature-indoor Ambient temperature; if pn<preset value, obtain the temperature of the outdoor coil, and calculate the difference D=frost temperature-outdoor coil temperature; selectively control the operating frequency of the compressor according to the difference D, to Make the difference D smaller than the set value. The present invention compares the difference pn between the preset temperature and the indoor ambient temperature, and controls the operating frequency of the compressor under the condition of pn<the preset value, so as to ensure the heating efficiency of the air conditioner when it is turned on, and also to increase the heating efficiency of the air conditioner. To suppress the purpose of frost formation.
Description
技术领域technical field
本发明属于空调器技术领域，具体涉及一种空调器抑制结霜控制方法。The invention belongs to the technical field of air conditioners, and in particular relates to a control method for suppressing frost formation of an air conditioner.
背景技术Background technique
空调器作为一种能够调节室内环境温度的设备，其工作原理为：通过制冷剂在循环管路之间通过高压/低压/气态/液态的状态转换来使室内环境温度降低或者升高，即从室内机的角度来看，空调器处于制冷或者制热工况。当空调器制热运行时，在一定的湿度条件下如果室外盘管温度过低会导致结霜情况，而室外盘管结霜会导致室外换热器的换热效率降低，影响空调器的制热效果，降低室内环境的舒适性，影响用户体验。因此，在空调器处于制热工况的情形下，需要对空调器的室外盘管进行及时而有效的除霜。As a device that can adjust the indoor ambient temperature, the air conditioner works on the principle that the indoor ambient temperature is reduced or increased by the refrigerant passing through the circulation pipeline through high-pressure/low-pressure/gas/liquid state transitions, that is, from From the perspective of the indoor unit, the air conditioner is in cooling or heating mode. When the air conditioner is in heating operation, if the temperature of the outdoor coil is too low under certain humidity conditions, it will cause frosting, and the frosting of the outdoor coil will reduce the heat exchange efficiency of the outdoor heat exchanger and affect the cooling performance of the air conditioner. The thermal effect reduces the comfort of the indoor environment and affects the user experience. Therefore, when the air conditioner is in a heating condition, timely and effective defrosting of the outdoor coil of the air conditioner is required.
现有的空调器都是在结霜之后再进行除霜操作，以保证空调器的制热效率。例如，空调器在运行制热过程中，利用运行时间+室外盘管温度判断空调器是否结霜，并在空调器处于结霜状态后，使空调器进入除霜模式。然而只要对空调器进行除霜就会导致室内温度出现一定的波动。Existing air conditioners all perform defrosting operation after frosting to ensure the heating efficiency of the air conditioner. For example, during the heating process of the air conditioner, the running time + outdoor coil temperature is used to judge whether the air conditioner is frosted, and after the air conditioner is in the frosted state, the air conditioner enters the defrosting mode. However, as long as the air conditioner is defrosted, there will be certain fluctuations in the indoor temperature.
因此，本发明提出了一种空调器抑制结霜控制方法来解决上述问题。Therefore, the present invention proposes a frosting suppression control method for an air conditioner to solve the above problems.
发明内容Contents of the invention
为了解决现有技术中的上述问题，为了实现空调器抑制结霜的目的，本发明提出了一种空调器抑制结霜控制方法，所述控制方法包括下列步骤：在空调器制热运行的过程中，获取室内环境温度；计算差值pn＝预设温度－室内环境温度；如果pn＜预设值，则获取室外盘管的温度，并计算差值D＝结霜温度－室外盘管温度；根据所述差值D选择性地控制压缩机的运行频率，以使所述差值D小于设定值。In order to solve the above-mentioned problems in the prior art, in order to achieve the purpose of suppressing frosting of the air conditioner, the present invention proposes a control method for suppressing frosting of the air conditioner. The control method includes the following steps: during the heating operation of the air conditioner , get the indoor ambient temperature; calculate the difference pn = preset temperature - indoor ambient temperature; if pn < preset value, get the temperature of the outdoor coil, and calculate the difference D = frosting temperature - outdoor coil temperature; The operating frequency of the compressor is selectively controlled according to the difference D, so that the difference D is smaller than a set value.
在上述空调器抑制结霜控制方法的优选实施方式中，“根据所述差值D选择性地控制压缩机的运行频率，以使所述差值D小于设定值”的步骤包括：如果所述差值D≥设定值，则降低所述压缩机的运行频率以使所述差值D＜设定值。In a preferred implementation of the method for controlling frost formation of an air conditioner, the step of "selectively controlling the operating frequency of the compressor according to the difference D, so that the difference D is smaller than the set value" includes: if the If the difference D≥set value, then reduce the operating frequency of the compressor so that the difference D<set value.
在上述空调器抑制结霜控制方法的优选实施方式中，所述设定值为0-3之间的任意值。In a preferred implementation of the method for controlling frost formation of the air conditioner above, the set value is any value between 0-3.
在上述空调器抑制结霜控制方法的优选实施方式中，所述设定值为0；或者所述设定值为3。In a preferred implementation of the method for controlling frost formation of the air conditioner, the set value is 0; or the set value is 3.
在上述空调器抑制结霜控制方法的优选实施方式中，所述结霜温度为根据空调器的使用环境预先设定的温度值；或者所述结霜温度为通过检测设备检测到的温度值。In a preferred embodiment of the method for controlling frosting suppression of the air conditioner, the frosting temperature is a temperature value preset according to the use environment of the air conditioner; or the frosting temperature is a temperature value detected by a detection device.
在上述空调器抑制结霜控制方法的优选实施方式中，所述结霜温度通过以下步骤计算：获取室外环境温度；获取室外相对湿度；根据所述室外环境温度和所述室外相对湿度计算空调器的结霜温度。In a preferred embodiment of the method for controlling frosting of the air conditioner, the frosting temperature is calculated through the following steps: obtaining the outdoor ambient temperature; obtaining the outdoor relative humidity; calculating the temperature of the air conditioner according to the outdoor ambient temperature and the outdoor relative humidity frosting temperature.
在上述空调器抑制结霜控制方法的优选实施方式中，根据如下公式计算空调器的结霜温度；T＝-24.5+0.9T1+28.6Φ；其中，T为结霜温度，T1为室外环境温度，Φ为室外相对湿度。In the preferred embodiment of the above-mentioned air conditioner frosting control method, the frosting temperature of the air conditioner is calculated according to the following formula; T=-24.5+0.9T1+28.6Φ; wherein, T is the frosting temperature, and T1 is the outdoor ambient temperature , Φ is the outdoor relative humidity.
在上述空调器抑制结霜控制方法的优选实施方式中，所述预设温度能够在16-30℃之间的范围内选择。In a preferred implementation of the method for controlling frost formation of the air conditioner, the preset temperature can be selected within the range of 16-30°C.
在上述空调器抑制结霜控制方法的优选实施方式中，所述预设值为2-4之间的任意值；并且/或者所述预设值为3。In a preferred implementation of the method for controlling frosting suppression of the air conditioner, the preset value is any value between 2-4; and/or the preset value is 3.
在上述空调器抑制结霜控制方法的优选实施方式中，“根据所述差值D选择性地控制压缩机的运行频率，以使所述差值D小于设定值”的步骤包括：通过PID算法控制压缩机的运行频率。In a preferred embodiment of the method for controlling frosting suppression of the air conditioner, the step of "selectively controlling the operating frequency of the compressor according to the difference D, so that the difference D is less than the set value" includes: An algorithm controls the operating frequency of the compressor.
本发明通过比较预设温度和室内环境温度的差值pn，在pn＜预设值的情况下，再通过控制压缩机的运行频率，使室外盘管的温度高于结霜温度，或者低于结霜温度不超过3℃(或者其他合理的温度)，从而既能够保证空调器开机制热的效率，也能够起到抑制结霜的目的，使用户在使用空调器制热的过程中不需要进行除霜或者进行很少次的除霜操作，提升用户的使用体验。The present invention makes the temperature of the outdoor coil higher than the frosting temperature or lower than the frosting temperature by comparing the difference pn between the preset temperature and the indoor ambient temperature. The frosting temperature does not exceed 3°C (or other reasonable temperature), which can not only ensure the heating efficiency of the air conditioner, but also prevent frosting, so that users do not need to use the air conditioner in the process of heating. Perform defrosting or perform few defrosting operations to improve user experience.
附图说明Description of drawings
图1是本发明的空调器抑制结霜控制方法的主要流程图。Fig. 1 is a main flow chart of the air conditioner frosting suppression control method of the present invention.
具体实施方式Detailed ways
为使本发明的实施例、技术方案和优点更加明显，下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所述的实施例是本发明的一部分实施例，而不是全部实施例。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。In order to make the embodiments, technical solutions and advantages of the present invention more obvious, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Example. 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.
如图1所示，本发明的空调器抑制结霜控制方法包括下列步骤：S110、在空调器制热运行的过程中，获取室内环境温度；S120、计算差值pn＝预设温度－室内环境温度；S130、如果pn＜预设值，则获取室外盘管的温度，并计算差值D＝结霜温度－室外盘管温度；S140、根据所述差值D选择性地控制压缩机的运行频率，以使所述差值D小于设定值。其中，预设温度可以由用户自定义设定，例如将预设温度设置为16-30℃之间的任意温度，该温度可以理解为用户期望的室内所达到的预期温度。As shown in Fig. 1, the air conditioner anti-frosting control method of the present invention includes the following steps: S110, during the heating operation of the air conditioner, obtain the indoor ambient temperature; S120, calculate the difference pn = preset temperature - indoor environment temperature; S130, if pn<preset value, obtain the temperature of the outdoor coil, and calculate the difference D=frost temperature-outdoor coil temperature; S140, selectively control the operation of the compressor according to the difference D frequency so that the difference D is less than the set value. Wherein, the preset temperature can be customized by the user, for example, the preset temperature can be set to any temperature between 16-30° C., which can be understood as the expected indoor temperature that the user expects to achieve.
具体而言，本发明首先比较预设温度和室内环境温度，如果预设温度高于室内环境温度超过预设值(本实施例中预设值为3)，则说明此时正处于开机制热阶段，由于刚开始制热，因此不会出现结霜现象，因此可以使空调器高频运行制热，即快速制热。只有在预设温度高于室内环境温度低于3时，说明空调器已经使室内环境温度上升到预期温度，此时空调器已经制热运行一段时间。在这种情况下，再通过控制压缩机的运行频率，进而控制室外盘管温度以实现抑制结霜的目的。这样一来，既能够保证空调器开机制热的效率，也能够起到抑制结霜的目的。Specifically, the present invention first compares the preset temperature with the indoor ambient temperature, and if the preset temperature is higher than the indoor ambient temperature and exceeds the preset value (in this embodiment, the preset value is 3), it means that the heating mechanism is being turned on at this time. In the first stage, since the heating has just started, there will be no frosting, so the air conditioner can be operated at high frequency for heating, that is, rapid heating. Only when the preset temperature is higher than the indoor ambient temperature and lower than 3, it means that the air conditioner has raised the indoor ambient temperature to the expected temperature, and the air conditioner has been heating and running for a period of time. In this case, control the operating frequency of the compressor, and then control the temperature of the outdoor coil to achieve the purpose of inhibiting frosting. In this way, it can not only ensure the heating efficiency of the air conditioner when it is turned on, but also achieve the purpose of inhibiting frosting.
需要说明的是，上述预设值可以由本领域技术人员灵活地选择，例如选择2-4之间的任意值，这些都不脱离本发明的保护范围。It should be noted that the above preset values can be flexibly selected by those skilled in the art, for example, any value between 2-4 can be selected, and these do not depart from the protection scope of the present invention.
在步骤S130和步骤S140中，作为一种示例，当差值D≥0时，也就是说，当室外盘管的温度低于结霜温度时，说明室外机存在结霜可能，此时可以通过降低压缩机的频率，使差值D＜0，即，使室外盘管的温度升高到结霜温度以上，从而抑制室外机结霜。本领域技术人员能够理解的是，虽然该方式在抑制结霜的过程中，降低了压缩机的运行频率，因此会牺牲部分制热量，但是，该方式能够有效地抑制室外机结霜，从而极大程度地减少了除霜次数，减少了因除霜造成的室内温度波动过大的问题。In step S130 and step S140, as an example, when the difference D≥0, that is to say, when the temperature of the outdoor coil is lower than the frosting temperature, it means that the outdoor unit may be frosted. Reduce the frequency of the compressor to make the difference D<0, that is, increase the temperature of the outdoor coil to above the frosting temperature, thereby inhibiting the frosting of the outdoor unit. Those skilled in the art can understand that although this method reduces the operating frequency of the compressor during the process of suppressing frost formation, thus sacrificing part of the heating capacity, this method can effectively suppress the frost formation of the outdoor unit, thereby extremely Minimizes the number of defrosting and reduces the problem of excessive indoor temperature fluctuations caused by defrosting.
作为另一种示例，当差值D≥3时，也就是说，当室外盘管的温度低于结霜温度超过3℃时，说明室外机存在极大地结霜可能，此时可以通过降低压缩机的频率，使差值D＜3，即，使室外盘管的温度升高到特定温度(即结霜温度减3℃)以上，从而抑制室外机结霜。本领域技术人员能够理解的是，虽然该方式在抑制结霜的过程中，室外盘管的温度允许低于结霜温度，因而可能导致出现少量结霜，但是由于室外盘管的温度低于结霜温度不超过3℃，因此，同样可以起到抑制结霜的效果。并且，由于该方式只要控制室外盘管温度低于结霜温度不超过3℃，因此，压缩机的运行频率不会被降低太多，从而对室内制热量的影响较小。换言之，该实施例一方面起到了抑制室外机结霜的目的，另一方面还降低了对室内制热量的影响。As another example, when the difference D≥3, that is, when the temperature of the outdoor coil is more than 3°C lower than the frosting temperature, it means that there is a great possibility of frosting on the outdoor unit. Make the difference D<3, that is, increase the temperature of the outdoor coil to above a specific temperature (that is, the frosting temperature minus 3°C), thereby inhibiting the outdoor unit from frosting. Those skilled in the art can understand that, although this method allows the temperature of the outdoor coil to be lower than the frosting temperature in the process of suppressing frosting, which may cause a small amount of frosting, but because the temperature of the outdoor coil is lower than the frosting temperature The frost temperature does not exceed 3°C, therefore, it can also have the effect of inhibiting frost formation. In addition, because this method only needs to control the temperature of the outdoor coil to be lower than the frosting temperature by no more than 3°C, the operating frequency of the compressor will not be reduced too much, so the impact on the indoor heating capacity is relatively small. In other words, on the one hand, this embodiment serves the purpose of inhibiting the frosting of the outdoor unit, and on the other hand, it also reduces the influence on the indoor heating capacity.
需要说明的是，上述中的设定值分别是0和3作为示例进行说明的，本领域技术人员还可以根据实际的设计需要灵活地选择其他合理的设定值，例如选择0-3之间的任意值作为设定值，这些都不脱离本发明的保护范围。It should be noted that the above-mentioned setting values are 0 and 3 respectively as examples for illustration, and those skilled in the art can also flexibly select other reasonable setting values according to actual design needs, such as choosing between 0-3 Any value of any value is used as the set value, and these do not depart from the protection scope of the present invention.
作为示例，上述控制压缩机运行频率的方法可以通过PID算法实现，或者使用其他任意已知的控制压缩机运行频率的方法，这些都不脱离本发明的保护范围。As an example, the above-mentioned method for controlling the operating frequency of the compressor may be realized by a PID algorithm, or any other known method for controlling the operating frequency of the compressor may be used, and these do not depart from the protection scope of the present invention.
本领域技术人员能够理解的是，结霜温度可以根据空调器的使用环境预先设定，在使用过程中只需要获取室外盘管温度，并与预先设定的结霜温度进行比较即可。结霜温度还可以通过相应的检测设备直接进行检测，例如在室外机安装相应的检测设备，实时或者间隔预设时间检测一次结霜温度。结霜温度还可以通过获取室外环境温度和室外相对湿度后计算得出。具体地，按照如下公式计算空调器的结霜温度：Those skilled in the art can understand that the frosting temperature can be preset according to the operating environment of the air conditioner, and it is only necessary to obtain the temperature of the outdoor coil during use and compare it with the preset frosting temperature. The frosting temperature can also be directly detected by corresponding detection equipment, such as installing corresponding detection equipment on the outdoor unit to detect the frosting temperature once in real time or at preset intervals. The frosting temperature can also be calculated by obtaining the outdoor ambient temperature and the outdoor relative humidity. Specifically, the frosting temperature of the air conditioner is calculated according to the following formula:
T＝-24.5+0.9T1+28.6Φ (1)T＝-24.5+0.9T 1 +28.6Φ (1)
上述公式(1)中，T为结霜温度，T1为室外环境温度，Φ为室外相对湿度。In the above formula (1), T is the frosting temperature, T1 is the outdoor ambient temperature, and Φ is the outdoor relative humidity.
综上所述，本发明通过比较预设温度和室内环境温度的差值pn，在pn＜预设值的情况下，再通过控制压缩机的运行频率，使室外盘管的温度高于结霜温度，或者低于结霜温度不超过3℃(或者其他合理的温度)，从而既能够保证空调器开机制热的效率，也能够起到抑制结霜的目的，使用户在使用空调器制热的过程中不需要进行除霜或者进行很少次的除霜操作，提升用户的使用体验。To sum up, the present invention compares the difference pn between the preset temperature and the indoor ambient temperature, and in the case of pn<the preset value, controls the operating frequency of the compressor so that the temperature of the outdoor coil is higher than the frosting temperature, or not more than 3°C (or other reasonable temperature) below the frosting temperature, so as to ensure the heating efficiency of the air conditioner when it is turned on, and also to inhibit frosting, so that users can use the air conditioner to heat In the process of defrosting, there is no need to perform defrosting or few defrosting operations, which improves the user experience.
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.
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