CN114719395A - 一种解决除霜后内机异常音的控制方法 - Google Patents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
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Abstract
本发明公开了一种解决除霜后内机异常音的控制方法,满足化霜退出条件时,执行化霜退出控制:压缩机频率以V1速率降低,室内机膨胀阀开度以V2速率减小,并判断系统低压是否小于等于设定值a,若是,则控制室内机膨胀阀开度以V3速率减小,且V3<V2,若否,则维持室内机膨胀阀开度以V2速率减小,当压缩机频率降低到零时,控制室内机膨胀阀开度减小至零。本发明在化霜完成后、四通阀换向前,即冷媒流向还处于制冷状态时,执行化霜退出控制,不会产生气体吹液体的咕噜的异常音。
Description
技术领域
本发明涉及一种解决除霜后内机异常音的控制方法。
背景技术
多联机俗称一拖多即一个外机可以连接多个内机,实现给单个房间或者多个房间制冷或者制热的系统。
多联机在冬季制热时候,空调内机为冷凝器,外机为蒸发器,制冷剂在蒸发时需要吸收一定的热量,吸收热量之后外机的温度会降低,蒸发器接触到室外的空气时会形成冷凝水,当室外温度持续降低就会产生结霜。
当结霜严重后室内制热效果下降,外机会启动化霜程序通过切换冷媒的流向即制冷状态,把压缩机的高温冷媒输送到外机换热器进行化霜,此时内机处于停止供热状态;在机组化霜过程切换冷媒,即制冷过程室内机是低温的液态冷媒,当化霜结束后再通过切换冷媒的流向来给室内继续供热,即制冷再转为制热;由于化霜过程高温的热气传送给外机化霜,化霜后液态制冷剂流入室内的蒸发器,化霜后冷媒流向改变,气态的冷媒再次流入室内机换热器,此时在室内换热管中气态的制冷剂先推动液态制冷剂流出,待液态冷媒流出时候,换热器温度才能升高,才能给室内供热,可是在化霜后再制热气态冷媒推动液态冷媒流出换热管到分路器再到电子膨胀阀这段,就会造成气态吹着液态冷媒的异常噪音出现,即咕噜、咕噜的噪音。
发明内容
针对上述问题,本发明提供了一种解决除霜后内机异常音的控制方法,有效解决了背景技术中指出的问题。
本发明采用的技术方案是:
一种解决除霜后内机异常音的控制方法,满足化霜退出条件时,执行化霜退出控制:压缩机频率以V1速率降低,室内机膨胀阀开度以V2速率减小,并判断系统低压是否小于等于设定值a,若是,则控制室内机膨胀阀开度以V3速率减小,且V3<V2,若否,则维持室内机膨胀阀开度以V2速率减小,当压缩机频率降低到零时,控制室内机膨胀阀开度减小至零。
作为优选,所述的化霜退出条件为室外换热器盘管温度大于等于12℃持续15秒,或系统高压压力大于等于2.4Mpa。
作为优选,所述的a为0.2Mpa。
作为优选,所述的V1为5hz/s,V2为5步/秒,所述的V3为3步/秒。
本发明在化霜完成后、四通阀换向前,即冷媒流向还处于制冷状态时,执行化霜退出控制,通过调节压缩机运行频率和电子膨胀阀开度,使液体制冷剂储存到室外换热管和到室内机的液管里面,当化霜完成再次启动时,由于室内换热管内液态冷媒在执行化霜退出控制时被抽出来,压缩机压缩的高温高压气体进入室内换热管时,由于室内机处于防冷风状态,不会产生气液两相状态,即不会产生气体吹液体的咕噜的异常音。
附图说明
图1为本发明的工作原理图。
具体实施方式
下面通过具体的实施例结合附图对本发明做进一步的详细描述。
实施例1
如图1所示,一种解决除霜后内机异常音的控制方法,满足化霜退出条件时,执行化霜退出控制:压缩机频率以5hz/s速率降低,室内机膨胀阀开度以5步/秒速率减小,并判断系统低压是否小于等于设定值0.2Mpa,若是,则控制室内机膨胀阀开度以3步/秒速率减小,,若否,则维持室内机膨胀阀开度以V2速率减小,当压缩机频率降低到零时,控制室内机膨胀阀开度减小至零。
所述的化霜退出条件为室外换热器盘管温度大于等于12℃持续15秒,或系统高压压力大于等于2.4Mpa。
本发明采用的多联机包括一个室外机,以及与室外机相连的多个室内机,室外机包括压缩机、油分离器、单向阀、四通阀、气液分离器、回油毛细管、换热器、储液器、主膨胀阀、经济器和风机,经济器、主膨胀阀、储液器、换热器、气液分离器、压缩机、油分离器和单向阀由室外机的制冷剂进口一端向制冷剂出口一端依次设置,换热器与气液分离器之间、单向阀与室外机的制冷剂出口之间均通过四通阀相连通,油分离器通过回油毛细管与压缩机的进口相连,经济器的一路出口与压缩机相连,室外机设有系统低压压力传感器。
本发明在化霜过程由于液态制冷剂从室内机膨胀阀进入分路头再进入换热管内,当满足化霜退出条件时执行化霜退出控制,即控制压缩机频率下降的同时室内机膨胀阀同步关小,而压缩机频率在持续下降,所以此过程压缩机会抽室内换热管里面的液态制冷剂,而室内机膨胀阀由于在关小,所以部分液态冷媒会储存到室外换热器和室外换热器到室内机的这段液管的里面,当化霜退出执行完毕再次启动时,由于室内换热管内液态冷媒在执行化霜退出控制时被抽出来,所以压缩机压缩的高温高压气体进入室内换热管时,由于室内机处于防冷风状态,不会产生气液两相状态,即不会产生气体吹液体的咕噜的异常音。
最后,需要注意的是,以上列举的仅是本发明的具体实施方式。显然,本发明不限于以上实施方式,还可以有很多变形。本领域的普通技术人员能从本发明公开的内容中直接导出或联想到的所有变形,均应认为是本发明的保护范围。
Claims (4)
1.一种解决除霜后内机异常音的控制方法,其特征在于,满足化霜退出条件时,执行化霜退出控制:压缩机频率以V1速率降低,室内机膨胀阀开度以V2速率减小,并判断系统低压是否小于等于设定值a,若是,则控制室内机膨胀阀开度以V3速率减小,且V3<V2,若否,则维持室内机膨胀阀开度以V2速率减小,当压缩机频率降低到零时,控制室内机膨胀阀开度减小至零。
2.根据权利要求1所述的一种解决除霜后内机异常音的控制方法,其特征在于,所述的化霜退出条件为室外换热器盘管温度大于等于12℃持续15秒,或系统高压压力大于等于2.4Mpa。
3.根据权利要求1所述的一种解决除霜后内机异常音的控制方法,其特征在于,所述的a为0.2Mpa。
4.根据权利要求1所述的一种解决除霜后内机异常音的控制方法,其特征在于,所述的V1为5hz/s,V2为5步/秒,所述的V3为3步/秒。
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CN110567128A (zh) * | 2019-09-23 | 2019-12-13 | 宁波奥克斯电气股份有限公司 | 一种多联机空调及其控制方法 |
CN110906581A (zh) * | 2019-12-03 | 2020-03-24 | 无锡同方人工环境有限公司 | 变频式空气源热泵机组的除霜方法 |
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CN101187516A (zh) * | 2006-11-17 | 2008-05-28 | 海尔集团公司 | 空调除霜方法 |
CN103388944A (zh) * | 2013-08-02 | 2013-11-13 | 广东美的制冷设备有限公司 | 空调系统及其控制方法 |
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