CN100451473C - Air conditioner with refrigerating medium lack and accident detection functions and method for detecting accidents - Google Patents

Air conditioner with refrigerating medium lack and accident detection functions and method for detecting accidents Download PDF

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CN100451473C
CN100451473C CN 200610122687 CN200610122687A CN100451473C CN 100451473 C CN100451473 C CN 100451473C CN 200610122687 CN200610122687 CN 200610122687 CN 200610122687 A CN200610122687 A CN 200610122687A CN 100451473 C CN100451473 C CN 100451473C
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refrigerant
temperature
ta
air conditioner
lack
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CN1928448A (en
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嵘 庄
桃 张
辉 张
璇 曹
殷海明
英 邵
辉 黄
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珠海格力电器股份有限公司
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Abstract

本发明涉及一种空调器和一种空调器故障诊断方法,特别涉及一种具有制冷剂缺少故障检测功能的空调器和空调内制冷剂缺少故障的检测方法。 The present invention relates to an air conditioner and a fault diagnosis method for an air conditioner, and particularly relates to a method of detecting lack of refrigerant of the air conditioner fault detection function and the lack of refrigerant having a fault. 一种具有制冷剂缺少故障检测功能的空调器,其包括压缩机、室外换热器、节流元件、室内换热器、中央处理单元和制冷剂缺少故障检测机构,该制冷剂缺少故障检测机构包括一管温温度传感器、一环境温度传感器和一比对单元,该管温温度传感器位于室内换热器的制冷剂管道中部,该环境温度传感器位于室内换热器迎风面,该比对单元连接于中央处理单元。 Lack of refrigerant having a fault detection function of an air conditioner, which comprises a compressor, an outdoor heat exchanger, expansion element, the indoor heat exchanger, a central processing unit and the fault detection means lacks refrigerant, the refrigerant lack of the fault detecting means temperature comprises a temperature sensor, an ambient temperature sensor and a comparison unit, the central pipe temperature refrigerant pipe temperature sensor located in the indoor heat exchanger, the ambient temperature sensor is located the windward side of the indoor heat exchanger, the comparing unit is connected a central processing unit. 由于本发明空调器仅通过室内温度以及管路温度的简单检测就可以判断制冷剂缺少或系统堵塞,无需检测电流,与所用压缩机的规格无关,方法简单实用可靠。 Since the air conditioner of the present invention, simply by detecting the indoor temperature and the piping temperature of the refrigerant can determine missing or clogging of the system, without the detection current, and are independent of the size of the compressor, the method is simple and practical and reliable.

Description

具有制冷剂缺少故障检测功能的空调器及故障检测方法技术领域 TECHNICAL FIELD The air conditioner having a refrigerant lack of fault detection fault detection function

本发明涉及一种空调器和一种空调器故障诊断方法,特别涉及一种具有制冷剂缺少故障检测功能的空调器和空调内制冷剂缺少故障的检测方法。 The present invention relates to an air conditioner and a fault diagnosis method for an air conditioner, and particularly relates to a method of detecting lack of refrigerant of the air conditioner fault detection function and the lack of refrigerant having a fault.

背景技术 Background technique

制冷剂泄漏是空调器常见的故障,它不仅会使系统流量减少降低冷暖效果,而且还会对系统的可靠性产生极大的危害。 Refrigerant leakage is a common fault of air conditioners, which will not only reduce heating and cooling system to reduce the effect of traffic, but would also produce great harm to the reliability of the system. 故障发生时, 压縮机电机不能得到充分冷却,不仅会降低电机的绝缘性能和可靠性,縮短电机寿命,还会降低润滑油的润滑性能,甚至引起润滑油的碳化和酸解,还有可能导致制冷剂的热分解,这一系列的问题均有可能引起压縮机镀铜、磨损加大、卡缸,磨损加大产生的金属屑更成为系统堵塞和绕组短路的诱因,甚至发生烧机问题,引发系统的恶性循环。 When a failure occurs, the compressor motor can not be fully cooled, will not only reduce the insulation performance and reliability of the motor and shorten the motor life, but also reduce the lubricating properties of the lubricating oil, carbonization and even cause acid hydrolysis lubricants, as well as possible results in thermal decomposition of the refrigerant, this series of questions are likely to cause the compressor copper, increased wear and tear, the card cylinder, increased wear and tear of the metal chips produced incentives become clogged and winding short-circuiting system, or even burn problem, triggering a vicious cycle system. 目前,空调器的制冷剂泄漏诊断模式普遍采用的是同时检测压縮机排气温度和压縮机电流的方法来判断,另外也有直接检测管道内压力来判断是否有制冷剂泄漏,但这两种方法的检测电路复杂,成本也相对高。 Currently, the air conditioner refrigerant leakage diagnosis mode is commonly used method of compressor while the compressor discharge temperature and current detection is determined, but also the additional line pressure is directly detected to determine whether there is refrigerant leakage, but the two method of detecting circuit is complicated, the cost is relatively high. 发明内容 SUMMARY

本发明所要解决的技术问题在于,提供一种可方便快捷检测是否制冷剂缺少的空调器和一种制冷剂缺少故障检测方法。 The present invention solves the technical problem is to provide a fast and easy detection of whether the lack of an air conditioner refrigerant and one fault detection method lacks the refrigerant.

本发明所要解决的技术问题是通过如下技术方案实现的: 一种具有制冷剂缺少故障检测功能的空调器,其包括压縮机、室外换热器、 节流元件、室内挟热器、中央处理单元和制冷剂缺少故障检测机构, 该制冷剂缺少故障检测机构包括一管温温度传感器、 一环境温度传感器和一比对单元,该管温温度传感器位于室内换热器的制冷剂管道中部,该环境温度传感器位于室内换热器迎风面,该比对单元连接于中央处理单元。 The present invention solves the technical problem is achieved by the following technical solutions: A lack of refrigerant having a fault detection function of an air conditioner, which comprises a compressor, an outdoor heat exchanger, expansion element, relying indoor heat, a central processing and the lack of the refrigerant unit failure detecting means, the refrigerant lack of the fault detection means comprises a temperature sensor temperature, an ambient temperature sensor and a comparison unit, the tube temperature and the temperature sensor located in the middle of the refrigerant pipes of the indoor heat exchanger, the ambient temperature sensor is located the windward side of the indoor heat exchanger, the comparison unit connected to the central processing unit.

本发明还提供一种空调器制冷剂缺少故障的检测方法,其包括如下步骤- The present invention also provides a method for detecting lack of refrigerant air conditioner fault, comprising the steps of -

a. 判断运行模式是否为制冷模式,如果是进入步骤b,如果否则停止判断过程; . A determined operation mode is the cooling mode, if the step B is entered, or if the stop determination process;

b. 检査位于室内换热器的制冷剂管道中部的管温温度传感器和位于室内换热器迎风面的环境温度传感器是否开路或短路,如果是则停止判断过程,如果否进入步骤c; . B Check the indoor heat exchanger located in line pipe temperature of the refrigerant and a temperature sensor located in the middle of the windward side of the indoor heat exchanger temperature sensor for open or short, if the process is stopped is determined, and if not proceeds to step C;

c. 通过管温温度传感器检测第0分钟也就是压縮机运转前环境温度TA,通过管温温度传感器检测第0分钟也就是压縮机运转前的的管温TB0和空调运转从第3分钟到第5分钟这段时间内的任一瞬时管温TB1,如果满足TB0》TA+1(TC或者满足T加《TA—1(TC则停止判断过程,无判断结果;否则进入步骤山 c. Detection is 0 minutes before the operation of the compressor by ambient temperature TA temperature pipe temperature sensor, the temperature detected by the pipe temperature sensor of the pipe which is 0 minutes and the temperature TB0 air conditioning operation before the operation of the compressor from the 3rd minute the pipe temperature TB1 any instant within the period of 5 minutes, if satisfied TB0 "TA + 1 (TC or T plus meet" TA-1 (TC stop determination process, no judgment result; otherwise, step mountain

d. 通过比对单元进一步比较TBo和TA,如果Ta〈Tbq〈 Ta+10°C, 进入步骤e,如果Ta—10'C<TBQ<TA,则进入步骤f; . D further comparison TBo and TA, if Ta <Tbq <Ta + 10 ° C, proceeds to step e, if the Ta-10'C <TBQ <TA, the process proceeds to step f by the comparing unit;

e. 不计TBo的实测值,而令Tb(PTa,判断Tbo —TW《3'C是否成立,如果成立则该空调有制冷剂缺少故障,否则正常; . E Excluding Found TBo, and so Tb (PTa, determines Tbo -TW "3'C is satisfied, it is established if the air conditioner refrigerant lack fault, otherwise normal;

f. 判断T即一Tw《3'C是否成立,如果成立则该空调有制冷剂缺少故障,否则正常。 f. That is a judgment T Tw "3'C is established, if the establishment of the air conditioning refrigerant lack of malfunction, otherwise normal.

由于本发明仅通过室内温度以及管路温度的简单检测就可以判断制冷剂缺少或系统堵塞,无需检测电流,与所用压縮机的规格无关, 方法简单实用可靠。 Since the present invention is simply detected indoor temperature and the temperature of the line can be judged by the lack of the refrigerant or clogging of the system, without the detection current, and are independent of the size of the compressor, the method is simple and practical and reliable. 附图说明 BRIEF DESCRIPTION

图1为本发明具制冷剂缺少检测功能的空调器机构示意图; 图2为本发明制冷剂缺少检测方法的流程图。 Figure 1 is a schematic view of the invention with the refrigerant of the air conditioner is missing detection means; flowchart refrigerant lack detection method of the present invention FIG. 具体实施方式 Detailed ways

参见图1, 一种具制冷剂缺少或系统堵塞诊断功能的空调器,其包括压縮机l、室外换热器2、膨胀阀3、室内换热器4、中央处理单元5和制冷剂缺少故障检测机构6,该制冷剂缺少故障检测机构6包括管温温度传感器61、环境温度传感器62和比对单元63,该管温温度传感器61位于制冷时室内换热器4的制冷剂管道中部,该环境温度传感器62位于室内换热器4迎风面,该比对单元62连接于中央处理单元5。 Referring to Figure 1 a system with a blockage or lack of refrigerant of the air conditioner diagnostic function, L comprising a compressor, an outdoor heat exchanger 2, an expansion valve 3, the indoor heat exchanger 4, a central processing unit 5 and the refrigerant lack fault detection means 6, the failure detecting means lacks refrigerant pipe 6 comprises a temperature sensor 61 temperature, ambient temperature sensor 62 and a comparison unit 63, the central indoor heat exchanger 4 of the refrigerant pipe when the pipe temperature sensor 61 is located in refrigerant temperature, the ambient temperature sensor 62 located on the windward side of the indoor heat exchanger 4, the comparison unit 62 is connected to the central processing unit 5.

参见图2, 一种空调器制冷剂缺少故障检测方法,其包括如下步 Referring to Figure 2, an air conditioner refrigerant lack of fault detection method, comprising the steps

a. 判断运行模式是否为制冷模式,如果是进入步骤b,如果否则停止判断过程;此步骤主要用于判断运行模式,只有制冷模式才是适于使用本发明的检测方法,而当运行模式不是制冷模式时,判断结果误差将比较明显。 determining whether the operation mode is a cooling mode, if the step B is entered, or if the stop determination process; This step is mainly used to judge the operation mode, a cooling mode is only suitable for the detection method of the present invention, and when the operation mode is not when the cooling mode, the obvious result of the error determination.

b. 检查管温温度传感器和环境温度传感器是否开路或短路,如果是则停止判断过程,如果否进入步骤c;此步骤主要是判断空调器的制冷剂缺少故障检测机构6有故障,如果任何一传感器不能正常工作就无法进行后续判断。 . B Check pipe temperature and the ambient temperature sensor a temperature sensor for open or short, if the process is stopped is determined, and if not proceeds to step C; this step is mainly determined air conditioner refrigerant lack fault detection mechanism 6 has a failure, if any sensor does not work can not follow-up determination.

c. 通过管温温度传感器检测第0分钟也就是压縮机运转前的管温TB。 C. Detection is 0 minutes before the pipe temperature TB through the operation of the compressor temperature sensor tube temperature. 和空调运转3-5分钟内的某一瞬间管温TB1,如果满足TB0 》TA+1(TC或者满足TB。《TA—10。C则停止判断过程,无判断结果;否则进入步骤d;此步骤判断初始管温是否在合理的范围之内,即与环境温度的差值应在10'C,否则判断结果也将有很大误差。 ". TA + 1 (TC or satisfy TB" and air conditioning operation of a pipe temperature TB1 moment in 3-5 minutes, if satisfied TB0 TA-10.C determination process is stopped, no judgment result; otherwise, step D; this the initial step of determining whether the tube within a reasonable temperature range, i.e. the difference in the ambient temperature should 10'C, or the determination result will also have a large error.

d. 通过比对单元进一步比较TB0和TA,如果TA<TB0< TA+10°C , d. By comparing unit further comparing TB0 and TA, if TA <TB0 <TA + 10 ° C,

进入步骤e,如果Ta—1(TC《bo〈Ta,则进入步骤f; Proceeds to step e, if the Ta-1 (TC "bo <Ta, the process proceeds to step F;

e. 不计TB0的实测值,而令Tb(PTa,判断Tb。 一Tb-3'C是否成立,如果成立则该空调有制冷剂缺少故障,否则正常;当初始管温大于环境温度时,以环境温度值作为初始管温值,判断经过3-5分钟的运行后空调管温Tw较环境温度Ta是否下降超过3T:,如果是则空调正常,否则可判定空调制冷剂缺少。 e Excluding Found TB0, and so Tb (PTa, determining whether a Tb Tb-3'C established, if the establishment of the air conditioning refrigerant lack fault, otherwise normal;.. When the initial pipe temperature greater than ambient temperature, to ambient temperature pipe temperature value as an initial value, determined after 3-5 minutes of running air-conditioning pipe temperature Tw Ta exceeds 3T :, whether decreased if the ambient temperature than normal air conditioning, or lack of refrigerant can be judged.

f. 判断Tb。 f. Analyzing Tb. 一Tb,《3。 A Tb, "3. C是否成立,如果成立则该空调有制冷剂缺少故障,否则正常;此步骤的情况是初始管温低于环境温度, 其原因可能是空调刚刚关闭不久等,这种情况下直接判断经过3-5分钟的运行后空调管温Tw较初始管温T即是否下降超过3 °C,如果是则空调正常,否则可判定空调制冷剂缺少。 C is satisfied, it is established if the air conditioner refrigerant lack failure, or normal; where this step is an initial pipe temperature below ambient temperature, which may be due to just off just like air-conditioning, in this case directly determined through 3- after running for 5 minutes i.e., whether the air-conditioning pipe temperature Tw down from the initial pipe temperature T exceeds 3 ° C, if the air conditioner is normal, or lack of refrigerant can be judged.

本发明空调器的制冷剂缺少或系统堵塞诊断原理是这样的: 制冷系统正常运转条件下,在系统开始运转的前5分钟内,制冷剂的温度变化很明显,如制冷剂缺少以后,系统流量减少,管温变化 The air conditioner of the present invention, the refrigerant lack or blockage detection system works like this: Under normal operating conditions of the refrigeration system, before the system starts to be operated within 5 minutes, the temperature change of the refrigerant is obvious, since the lack of refrigerant, the flow rate in the system reduced pipe temperature change

很小,甚至不变。 Little or unchanged. 根据初始环境温度ta和初始管温tbq的大小关系 The magnitude relation between ta and the initial temperature of the initial pipe temperature tbq

确定是否进行判断同时对Tbo迸行修正,从压縮机连续运转的第3分钟开始,检测第3、 4、 5分钟内任意时刻管温的瞬时值,并和Tbo迸行对比,如満足Tb。 Determining determines whether correction while Tbo into line, from the first three minutes of continuous operation of the compressor, the third detection, 4, the instantaneous value at any point of the tube temperature within 5 minutes, and the contrast and Tbo into line, such as Man foot Tb . 一Tb,《3'C再采取相应的保护措施,就可以有效地避免系统制冷剂缺少引起的空调器各类故障发生。 A Tb, "3'C then take appropriate protective measures, it can effectively avoid the lack of air-conditioner refrigerant system failures caused by the occurrence of various types.

本发明还有其他一些变形或者改进,如上述管温温度传感器位于室内换热器的制冷剂管道其它位置,或管温瞬时值的采集时间不是第3、 4、 5分钟等,本发明中的节流元件可以是毛细管也可以是膨胀阀等其他起节流作用的元件。 There are other variations of the present invention or improvements, such as the tube temperature and the refrigerant pipe temperature sensor is located elsewhere in the indoor heat exchanger, or acquisition time is not the pipe temperature of instantaneous values ​​of 3, 4, 5 minutes, etc., according to the present invention It may be a capillary tube throttle element may be other elements from the throttling effect of the expansion valve. 如果本技术领域的技术人员受到本发明的启发做出的显而易见的非实质性的改变或者改进,均属于本发明权利要求书的保护范围。 If skilled in the art will be apparent to insubstantial changes made to the present invention inspired or modified, it belongs to the invention as claimed protection scope.

Claims (1)

1、 一种空调器制冷剂缺少故障的检测方法,其特征在于,其包括如下步骤:a. 判断运行模式是否为制冷模式,如果是进入步骤b,如果否则停止判断过程;b. 检査位于室内换热器的制冷剂管道中部的管温温度传感器和位于室内换热器迎风面的环境温度传感器是否开路或短路,如果是则停止判断过程,如果否进入步骤c;c. 通过管温温度传感器检测第0分钟也就是压縮机运转前的环境温度TA,通过管温温度传感器检测第0分钟也就是压縮机运转前的管温TB0和空调运转从第3分钟到第5分钟这段时间内的任一瞬时管温TB1,如果满足TB0^TA+1(TC或者满足TB0 《TA—1(TC则停止判断过程;否则进入步骤d;d. 通过比对单元进一步比较T加和Ta,如果TA<TB()<TA+10°C , 进入步骤e,如果Ta—1(TC〈Tb^Ta,则进入步骤f;e. 不计TBo的实测值,而令Tb(^Ta,判断T朋—TW《3'C是否成立,如果成立则该 1, an air conditioner refrigerant lack fault detecting method, characterized in that it comprises the steps of: a determined operation mode is the cooling mode, if the step B is entered, or if the stop determination process; check B is located. pipe temperature sensor whether the temperature of the middle of the indoor heat exchanger refrigerant pipe and the indoor heat exchanger located on the windward side of the ambient temperature sensor open or short, if it is determined to stop the process, and if not proceeds to step c;. c pipe temperature by temperature the first sensor detects the ambient temperature is 0 minutes before TA compressor operation, the temperature detected by the pipe temperature sensor of the pipe which is 0 minutes and the temperature TB0 operation of the compressor before the air conditioning operation from 3 minutes to 5 minutes of this any instant pipe temperature TB1 in time, if satisfied TB0 ^ TA + 1 (TC or satisfy TB0 "TA-1 (TC stop determination process; otherwise, step d; d by the comparing unit further comparing T plus and Ta. If TA <TB () <TA + 10 ° C, proceeds to step E, if Ta-1 (TC <Tb ^ Ta, the process proceeds to step f;. e excluding Found TBo, and so Tb (^ Ta, determination T Peng -TW "3'C is established, if the establishment of the 空调有制冷剂缺少故障,否则正常;f. 判断Tbo —Tw《3-C是否成立,如果成立则该空调有制冷剂缺少故障,否则正常。 Air conditioning refrigerant lack of malfunction, otherwise normal;. F judge Tbo -Tw "3-C is established, if the establishment of the air conditioning refrigerant lack of malfunction, otherwise normal.
CN 200610122687 2006-10-12 2006-10-12 Air conditioner with refrigerating medium lack and accident detection functions and method for detecting accidents CN100451473C (en)

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