JP2010230240A - Air conditioner - Google Patents
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Abstract
Description
本発明は、空気調和装置に関するもので、特に、ヒートポンプ式の空気調和装置に関するものである。 The present invention relates to an air conditioner, and more particularly to a heat pump type air conditioner.
従来、この種のヒートポンプ式の空気調和装置の暖房運転時の除霜方式は、一般的に、四方弁を切り換え、冷凍サイクルの冷媒を逆方向に流す除霜方式をとっている。即ち、除霜運転は、冷房時と同じ冷媒の流動方向とし、室外熱交換器に高温高圧の冷媒を流す事により、室外熱交換器に付着した霜を融解するものである。 Conventionally, the defrosting method at the time of heating operation of this type of heat pump type air conditioner generally adopts a defrosting method in which the four-way valve is switched and the refrigerant of the refrigeration cycle is caused to flow in the reverse direction. That is, in the defrosting operation, the frost adhering to the outdoor heat exchanger is melted by flowing the high-temperature and high-pressure refrigerant through the outdoor heat exchanger with the same refrigerant flow direction as that during cooling.
この除霜方式では、除霜時は、室内側の室内熱交換器が蒸発器となるため、部屋の温度が低下して冷風感を感じるという基本的課題があった。特に、低外気温度時や、湿度の高い地域においては、着霜量が多くなり、除霜時間が長くなり、部屋の室温低下時間が長くなるという課題があった。 In this defrosting method, during the defrosting, since the indoor heat exchanger on the indoor side becomes an evaporator, there is a basic problem that the temperature of the room is lowered and a cold wind feeling is felt. In particular, at low outside air temperatures and in high humidity areas, there is a problem that the amount of frost formation increases, the defrosting time increases, and the room temperature decrease time increases.
この基本的課題への対策として、最適な、除霜時間で室温低下を抑えるよう、外気温度を検知する室外気温度検出手段や室外熱交換器の温度を検知する室外配管温度検出手段に基づき除霜開始時間や除霜時間を制御する発明や、着霜量が多くなったとき、その着霜を機械的に除去する除霜手段や、着霜しにくい熱交換器が提案されてきた。 As countermeasures against this basic problem, an optimal outdoor air temperature detecting means for detecting the outside air temperature and an outdoor pipe temperature detecting means for detecting the temperature of the outdoor heat exchanger so as to suppress the decrease in the room temperature with the optimal defrosting time. Inventions for controlling the frost start time and defrost time, defrosting means for mechanically removing the frost when the amount of frost formation increases, and a heat exchanger that hardly forms frost have been proposed.
図４は、従来の空気調和装置における冷凍サイクルの構成図である。 FIG. 4 is a configuration diagram of a refrigeration cycle in a conventional air conditioner.
同図に示すように、従来の空気調和装置は、室外機９と室内機８を冷媒回路で連結してヒートポンプ式冷凍サイクルを構成し、室外機９は、圧縮機１と、四方弁２と、減圧器４と、室外送風機７と、室外熱交換器５と、室外熱交換器５の温度を検知する室外配管温度検出手段１０と、室外気温度を検知する室外気温度検出手段１１を具備している。 As shown in the figure, the conventional air conditioner comprises an outdoor unit 9 and an indoor unit 8 connected by a refrigerant circuit to constitute a heat pump refrigeration cycle. The outdoor unit 9 includes a compressor 1, a four-way valve 2, and the like. A decompressor 4, an outdoor fan 7, an outdoor heat exchanger 5, an outdoor pipe temperature detecting means 10 for detecting the temperature of the outdoor heat exchanger 5, and an outdoor air temperature detecting means 11 for detecting the outdoor air temperature. is doing.
室内機８は、室内熱交換器３と、室内送風機６と、室内気温度を検知する室内気温度検出手段１２を具備している。 The indoor unit 8 includes an indoor heat exchanger 3, an indoor blower 6, and an indoor air temperature detection means 12 that detects the indoor air temperature.
除霜を行うときは、暖房運転時に、四方弁２を切り換え、冷房時と同じ冷媒の流動方向とし、室外熱交換器５に高温高圧の冷媒を流す事により、室外熱交換器５に付着した霜を融解して除霜を行うことを特徴としている。 When defrosting is performed, the four-way valve 2 is switched during heating operation, the refrigerant flows in the same direction as that during cooling, and the high-temperature and high-pressure refrigerant flows through the outdoor heat exchanger 5 to adhere to the outdoor heat exchanger 5. It is characterized by defrosting by melting frost.
図５は、上記従来の空気調和装置の除霜運転時のタイムチャートである。 FIG. 5 is a time chart during the defrosting operation of the conventional air conditioner.
同図において、除霜開始条件が成立すると除霜準備区間に入り、圧縮機１の運転周波数、室外送風機７の回転数、減圧器４の開度を変化させて、所定の時間経過や所定の圧縮機温度に応じてステータス移行を行う（ＳＴ１〜３）。 In the same figure, when the defrosting start condition is satisfied, the defrosting preparation section is entered, the operating frequency of the compressor 1, the rotational speed of the outdoor blower 7, and the opening of the decompressor 4 are changed, and a predetermined time lapse or a predetermined Status transition is performed according to the compressor temperature (ST1 to ST3).
除霜区間のＳＴ４にて、四方弁２により冷媒回路を切り換えて冷房サイクルの運転によって除霜を行う四方弁切り換え除霜を開始し、冷房時と同じ冷媒の流動方向とし、室外熱交換器に高温高圧の冷媒を流す事により、室外熱交換器５に付着した霜を融解して除霜を行う。 In ST4 of the defrosting section, the refrigerant circuit is switched by the four-way valve 2 and the four-way valve switching defrosting for performing the defrosting by the operation of the cooling cycle is started, and the same refrigerant flow direction as in the cooling is set to the outdoor heat exchanger. By flowing a high-temperature and high-pressure refrigerant, frost adhering to the outdoor heat exchanger 5 is melted and defrosted.
この時、室内送風機６、室外送風機７は停止、減圧器４は全開とし所定の時間経過によりステータス移行する。ＳＴ５にて、圧縮機１の運転周波数を変えて、所定の時間経過や
所定の室外配管温度ａ℃以上の時にステータス移行を行う。
At this time, the indoor blower 6 and the outdoor blower 7 are stopped, the decompressor 4 is fully opened, and the status shifts when a predetermined time elapses. In ST5, the operation frequency of the compressor 1 is changed, and status transition is performed when a predetermined time has elapsed or when the predetermined outdoor piping temperature is a ° C or higher.
ＳＴ６は、所定の時間経過や所定の室外配管温度ｂ℃以上の時にステータス移行を行う。ＳＴ７は、所定の時間経過や所定の室外配管温度ｃ℃以上の時にステータス移行を行う。このとき、ＳＴ４からＳＴ６の最大時間はｔｍａｘとする。 In ST6, status transition is performed when a predetermined time elapses or a predetermined outdoor piping temperature b ° C. or higher. In ST7, status transition is performed when a predetermined time elapses or a predetermined outdoor piping temperature is equal to or higher than c ° C. At this time, the maximum time from ST4 to ST6 is tmax.
除霜終了区間のＳＴ８、ＳＴ９にて圧縮機１の運転周波数を変え、室外送風機７を運転、減圧器４の開度を変え、所定の時間経過によりステータス移行を行う。ＳＴ９終了後は、再び四方弁２を切り換え、室内送風機６を運転、減圧器４を初期ｐｌｓに設定し通常暖房運転へと移行する。 In ST8 and ST9 of the defrosting end section, the operating frequency of the compressor 1 is changed, the outdoor blower 7 is operated, the opening of the decompressor 4 is changed, and the status shift is performed after a predetermined time. After the end of ST9, the four-way valve 2 is switched again, the indoor blower 6 is operated, the decompressor 4 is set to the initial pls, and the routine proceeds to the normal heating operation.
しかし、上記構成では、除霜時は室内熱交換器３が蒸発器となるため、部屋の温度が低下して冷風感を感じるという基本的課題があり、特に低外気温度時や、湿度の高い地域によっては着霜量が多く除霜時間が長くなり除霜中に室外配管温度検出手段によって検知された室外熱交換器温度が所定の室外配管温度に到達する前に、除霜時間が所定の最大時間Ｔ５を経過してしまう場合があり、すなわち充分に除霜ができていない溶け残りが発生してしまう場合があり、外気温度を検知する室外気温度検出手段１１や室外熱交換器５の温度を検知する室外配管温度検出手段１０に基づいて、着霜を判断し最適な除霜時間で室温低下を抑えるように、除霜開始条件や除霜時間を制御するようにした空気調和装置が提案されている（例えば、特許文献１参照）。
しかしながら、上記特許文献１に記載された従来の空気調和装置のような、外気温度を検知する室外気温度検出手段や室外熱交換器の温度を検知する室外配管温度検出手段に基づいて、着霜を判断し最適な除霜時間で室温低下を抑えるように除霜開始条件や除霜時間を制御する方式では、次のような課題が発生する。 However, the frost formation is based on the outdoor air temperature detecting means for detecting the outside air temperature or the outdoor pipe temperature detecting means for detecting the temperature of the outdoor heat exchanger, such as the conventional air conditioner described in Patent Document 1. In the method of controlling the defrost start conditions and the defrost time so as to suppress the decrease in the room temperature with the optimum defrost time, the following problems occur.
特に低外気温度時や、湿度の高い地域における着霜量は多く、除霜運転時に最適な除霜時間で室温低下を抑えるよう制御しようとすると、暖房運転時に除霜開始までの時間を短くすることとなり、四方弁切り換え除霜の回数も多くなってしまい、暖房性能を維持することが困難であり、結果部屋の快適性が悪化してしまうという課題を有していた。 The amount of frost formation is particularly high at low outside air temperatures and in high humidity areas, and shortening the time until the start of defrosting during heating operation is attempted when controlling to reduce the room temperature with the optimal defrosting time during defrosting operation. In other words, the number of times of defrosting by switching the four-way valve is increased, it is difficult to maintain the heating performance, and as a result, the comfort of the room is deteriorated.
本発明は、上記従来の課題を解決するもので、四方弁切り換え除霜運転時において、霜溶け残りの問題も発生しない安定した除霜運転を提供すると共に、部屋の快適性を充分に満足させることができる信頼性の高い空気調和装置を提供することを目的としている。 The present invention solves the above-described conventional problems, and provides a stable defrosting operation that does not cause a problem of frost undissolved during a four-way valve switching defrosting operation, and sufficiently satisfies room comfort. It is an object of the present invention to provide a highly reliable air conditioner that can be used.
上記従来の課題を解決するために、本発明の空気調和装置は、圧縮機、四方弁、減圧器、室外送風機、室外熱交換器、前記室外熱交換器の温度を検知する室外配管温度検出手段、室外気温度を検知する室外気温度検出手段を具備した室外機と、室内熱交換器、室内送風機、室内気温度を検知する室内気温度検出手段を具備した室内機とを冷媒回路で連結してヒートポンプ式冷凍サイクルを構成した空気調和装置において、前記室外熱交換器の背面近傍に移動する回転ブラシを備えたもので、暖房運転時に、回転ブラシを回転させながら移動させることにより、前記室外熱交換器に付着した霜を確実に掻き落とすことができる。また、外気空調負荷変化や雪の付着、室外熱交換器の凍結バラツキなどにより発生する恐れのある霜の溶け残りを防止する事もできる。以上のように、四方弁切り換え除霜時において、霜溶け残りの問題も発生しない安定した除霜運転をすることができる。 In order to solve the above-described conventional problems, an air conditioner of the present invention includes a compressor, a four-way valve, a pressure reducer, an outdoor fan, an outdoor heat exchanger, and an outdoor pipe temperature detecting means for detecting the temperature of the outdoor heat exchanger. A refrigerant circuit connecting an outdoor unit having an outdoor air temperature detecting means for detecting the outdoor air temperature and an indoor heat exchanger, an indoor fan, and an indoor unit having an indoor air temperature detecting means for detecting the indoor air temperature. In the air conditioner that constitutes the heat pump refrigeration cycle, the outdoor heat exchanger is provided with a rotating brush that moves in the vicinity of the back surface of the outdoor heat exchanger, and the outdoor heat is moved by rotating the rotating brush during heating operation. The frost attached to the exchanger can be surely scraped off. In addition, it is possible to prevent unmelted frost that may be generated due to a change in the outside air-conditioning load, snow adhesion, freezing variation of the outdoor heat exchanger, and the like. As described above, at the time of defrosting by switching the four-way valve, it is possible to perform a stable defrosting operation that does not cause a problem of remaining frost.
本発明の空気調和装置は、暖房運転時における四方弁切り換え除霜運転中において、低外気温度時や、湿度の高い地域で着霜量が多い場合でも、室外熱交換器の背面近傍に設けた回転ブラシを移動させ、室外熱交換器に付着した霜を掻き落とし除霜時間の短縮を図ることができ、霜溶け残りの問題も発生しない安定した除霜運転を提供すると共に、除霜時間が短くなることで部屋の快適性を充分に満足させることができる。 The air conditioner of the present invention is provided in the vicinity of the back surface of the outdoor heat exchanger even when the amount of frost formation is high at a low outside air temperature or in a high humidity area during the four-way valve switching defrosting operation during the heating operation. Move the rotating brush, scrape frost attached to the outdoor heat exchanger, shorten the defrosting time, provide a stable defrosting operation that does not cause the problem of frost thaw, and the defrosting time By shortening, the comfort of the room can be fully satisfied.
第１の発明は、圧縮機、四方弁、減圧器、室外送風機、室外熱交換器、前記室外熱交換器の温度を検知する室外配管温度検出手段、室外気温度を検知する室外気温度検出手段を具備した室外機と、室内熱交換器、室内送風機、室内気温度を検知する室内気温度検出手段を具備した室内機とを冷媒回路で連結してヒートポンプ式冷凍サイクルを構成した空気調和装置において、前記室外熱交換器の背面近傍に移動する回転ブラシを備えたもので、暖房運転時に、回転ブラシを回転させながら移動させることにより、前記室外熱交換器に付着した霜を確実に掻き落とすことができる。また、外気空調負荷変化や雪の付着、室外熱交換器の凍結バラツキなどにより発生する恐れのある霜の溶け残りを防止する事もできる。以上のように、四方弁切り換え除霜時において、霜溶け残りの問題も発生しない安定した除霜運転をすることができる。 The first invention includes a compressor, a four-way valve, a decompressor, an outdoor fan, an outdoor heat exchanger, an outdoor pipe temperature detecting means for detecting the temperature of the outdoor heat exchanger, and an outdoor air temperature detecting means for detecting the outdoor air temperature. In an air conditioner comprising a heat pump refrigeration cycle in which an outdoor unit comprising an indoor unit, an indoor heat exchanger, an indoor blower, and an indoor unit comprising an indoor air temperature detecting means for detecting indoor air temperature are connected by a refrigerant circuit In addition, a rotating brush that moves in the vicinity of the back surface of the outdoor heat exchanger is provided. During heating operation, the rotating brush is moved while being rotated, so that frost attached to the outdoor heat exchanger is surely scraped off. Can do. In addition, it is possible to prevent unmelted frost that may be generated due to a change in the outside air-conditioning load, snow adhesion, freezing variation of the outdoor heat exchanger, and the like. As described above, at the time of defrosting by switching the four-way valve, it is possible to perform a stable defrosting operation that does not cause a problem of remaining frost.
第２の発明は、特に、第１の発明の暖房運転時に室外熱交換器の除霜を行う際、回転ブラシを回転させながら移動させて、前記室外熱交換器に付着した霜を掻き落とすもので、低外気温度時や、湿度の高い地域で着霜量が多い場合でも、室外熱交換器に付着した霜を確実にしかも早く掻き落とすことができるので、室外熱交換器の温度を検知する室外配管温度検出手段の温度も早く上昇し、除霜運転時間を短縮することができ、部屋の室温低下を抑えることができる。また、これにより外気空調負荷変化や雪の付着、室外熱交換器の凍結バラツキなどにより発生する恐れのある霜の溶け残りを防止する事が可能となる。 In the second invention, in particular, when performing defrosting of the outdoor heat exchanger during the heating operation of the first invention, the rotating brush is moved while rotating to scrape off the frost adhering to the outdoor heat exchanger. Therefore, even when the amount of frost formation is high at low outdoor temperatures or in high humidity areas, the frost adhered to the outdoor heat exchanger can be scraped off reliably and quickly, so the temperature of the outdoor heat exchanger is detected. The temperature of the outdoor pipe temperature detecting means also rises quickly, the defrosting operation time can be shortened, and the room temperature drop in the room can be suppressed. In addition, this makes it possible to prevent frost from remaining undissolved that may be generated due to changes in the outside air-conditioning load, snow adhesion, freezing variations in the outdoor heat exchanger, and the like.
以上のように、四方弁切り換え除霜時において、霜溶け残りの問題も発生しない安定した除霜運転を提供すると共に、部屋の快適性を充分に満足させることができる信頼性の高い空気調和装置を提供することができる。 As described above, at the time of defrosting by switching the four-way valve, a highly reliable air conditioner that provides a stable defrosting operation that does not cause a problem of frost thawing and that can sufficiently satisfy the comfort of the room. Can be provided.
第３の発明は、特に、第１又は第２の発明の空気調和装置において、除霜前の圧縮機の運転周波数、室外気温度検出手段、室外配管温度検出手段、室内気温度検出手段による検出結果に基づいて、回転ブラシの回転数や前記回転ブラシを移動させる回数を変えるもので、除霜運転時には最適な除霜時間で室温低下を抑えるよう除霜前の前記圧縮機運転周波数や外気温度を検知する室外気温度検出手段、室外熱交換器の温度を検知する室外配管温度検出手段、室内気温度を検知する室内気温度検出手段に基づき室外熱交換器の着霜を判断し、除霜時間がある所定の時間を超える場合、最適な除霜時間になるように回転ブラシの回転数や回転ブラシを移動させる回数を変えるよう制御する。例えば、低外気温度時や、湿度の高い地域で着霜量が多い場合は、回転ブラシの回転数を上げ、回転ブラシを移動する回数を増やすことで、最適な除霜時間で室温低下を抑えるように制御した除霜運転を行うことができる。 According to a third aspect of the invention, in particular, in the air conditioner of the first or second aspect of the invention, the operation frequency of the compressor before defrosting, the outdoor air temperature detecting means, the outdoor pipe temperature detecting means, the detection by the indoor air temperature detecting means Based on the results, the number of rotations of the rotating brush and the number of times the rotating brush is moved are changed. During the defrosting operation, the compressor operating frequency and the outside air temperature before the defrosting are controlled so as to suppress the decrease in the room temperature with the optimum defrosting time. The outdoor air temperature detecting means for detecting the outdoor air temperature, the outdoor pipe temperature detecting means for detecting the temperature of the outdoor heat exchanger, the indoor air temperature detecting means for detecting the indoor air temperature, and frost formation of the outdoor heat exchanger is judged and defrosted. When the time exceeds a predetermined time, control is performed so as to change the number of rotations of the rotating brush and the number of times the rotating brush is moved so that the optimum defrosting time is reached. For example, when the amount of frost formation is high at low outside air temperatures or in high humidity areas, increase the number of rotations of the rotating brush and increase the number of times the rotating brush is moved, thereby suppressing room temperature decrease with optimal defrosting time. The defrosting operation controlled as described above can be performed.
以上のように、特に低外気温度時や、湿度の高い地域において着霜量が多くなった場合でも、室外熱交換器に付着した霜を掻き落とすよう制御するので最適な除霜時間で室温低下を抑えることができ、部屋の快適性を充分に満足させることができる。また霜溶け残りの問題も発生しない安定した除霜運転を行うことができる。 As described above, even when the amount of frost formation is high, especially at low outdoor temperatures or in areas with high humidity, the frost adhering to the outdoor heat exchanger is controlled to be scraped off. The room comfort can be fully satisfied. Moreover, the stable defrosting operation which does not generate | occur | produce the problem of frost melting | dissolving residue can be performed.
第４の発明は、特に、第１〜３のいずれか一つの発明の回転ブラシを駆動制御する回転ブラシ駆動制御手段を設け、当該空気調和装置の累積運転時間に基づいて前記回転ブラシ
駆動制御手段を動作させる自動清掃モードと、前記累積運転時間に関わらず、使用者が任意に前記回転ブラシ駆動制御手段を動作させる手動清掃モードとを備えたもので、除霜運転時のみでなく通常冷房運転や暖房運転時において、当該空気調和装置の累積運転時間に応じて回転ブラシを移動させ、前記室外熱交換器に付着した塵埃を掻き落とすことができる。また、使用者は、必要に応じて、前記累積運転時間に関わらず、回転ブラシを移動させ、前記室外熱交換器に付着した塵埃を掻き落とすことができるので、冷房性能や暖房性能を十分に満足させることができる。
In particular, the fourth invention is provided with a rotary brush drive control means for driving and controlling the rotary brush according to any one of the first to third inventions, and the rotary brush drive control means based on the cumulative operation time of the air conditioner. And a manual cleaning mode in which the user arbitrarily operates the rotary brush drive control means regardless of the cumulative operation time, and is provided with a normal cooling operation as well as a defrosting operation. In the heating operation, the rotating brush can be moved according to the cumulative operation time of the air conditioner, and dust attached to the outdoor heat exchanger can be scraped off. In addition, the user can move the rotating brush and scrape the dust adhering to the outdoor heat exchanger as necessary, regardless of the accumulated operation time, so that the cooling performance and the heating performance can be sufficiently obtained. Can be satisfied.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
（実施の形態１）
図１は、本発明の実施の形態１における空気調和装置の構成図、図２は、同空気調和装置のブロック図、図３は、同空気調和装置の除霜運転時のタイムチャート図である。尚、上記従来の空気調和装置と同一部分には同一符号を付してその説明を省略する。
(Embodiment 1)
FIG. 1 is a configuration diagram of the air-conditioning apparatus according to Embodiment 1 of the present invention, FIG. 2 is a block diagram of the air-conditioning apparatus, and FIG. 3 is a time chart during the defrosting operation of the air-conditioning apparatus. . In addition, the same code | symbol is attached | subjected to the same part as the said conventional air conditioning apparatus, and the description is abbreviate | omitted.
図１において、本実施の形態における空気調和装置の室外機９には、圧縮機１と、四方弁２と、減圧器４と、室外送風機７と、室外熱交換器５と、室外配管温度検出手段１０と、室外気温度検出手段１１と、室外熱交換器５の背面近傍に上下動可能に設けられた回転ブラシ１３と、回転ブラシ１３を回転させながら上下に移動させる回転ブラシ駆動装置１４が配設されている。 In FIG. 1, the outdoor unit 9 of the air conditioner in the present embodiment includes a compressor 1, a four-way valve 2, a decompressor 4, an outdoor blower 7, an outdoor heat exchanger 5, and outdoor pipe temperature detection. Means 10, an outdoor air temperature detecting means 11, a rotating brush 13 provided in the vicinity of the back surface of the outdoor heat exchanger 5 so as to move up and down, and a rotating brush driving device 14 for moving the rotating brush 13 up and down while rotating it. It is arranged.
図２において、暖房運転中に室外機９側で圧縮機運転周波数検出手段５１により圧縮機１の運転周波数を検知し、室外気温度検出手段１１により外気温度を検知し、室外配管温度検出手段１０により室外熱交換器５の配管温度を検知する。 In FIG. 2, during the heating operation, the operation frequency of the compressor 1 is detected by the compressor operation frequency detection means 51 on the outdoor unit 9 side, the outside air temperature is detected by the outdoor air temperature detection means 11, and the outdoor pipe temperature detection means 10 is detected. Is used to detect the pipe temperature of the outdoor heat exchanger 5.
また、室内機８側では、室内気温度検出手段５２により室内気温度を検知する。検知された圧縮機運転周波数や室外気温度、室内気温度、室外配管温度に基づき、除霜開始条件判定部５０において、室外熱交換器５に着霜したかを判断し条件クリアの場合、除霜運転を開始し、除霜時間を除霜時間算出部５３で算出する。 On the indoor unit 8 side, the room air temperature detecting means 52 detects the room air temperature. Based on the detected compressor operating frequency, outdoor air temperature, indoor air temperature, and outdoor piping temperature, the defrosting start condition determining unit 50 determines whether the outdoor heat exchanger 5 has been frosted, The frost operation is started, and the defrost time is calculated by the defrost time calculation unit 53.
除霜時間がある所定の時間以上と算出された場合、最適な除霜時間で室温低下を抑えるようにする為、検知された温度や周波数に基づいて回転ブラシ駆動制御手段５４により、回転ブラシ１３の回転数を回転ブラシ回転数指示部５５で指示するとともに、回転ブラシ１３の上下の移動回数を、回転ブラシ上下移動回数指示部５６で指示する。 When the defrosting time is calculated to be equal to or longer than a predetermined time, the rotating brush 13 is controlled by the rotating brush drive control means 54 based on the detected temperature and frequency in order to suppress the decrease in the room temperature with the optimum defrosting time. The rotation number of the rotating brush 13 is instructed by the rotating brush rotation number instructing unit 55, and the number of times the rotating brush 13 is moved up and down is instructed by the rotating brush up / down movement number indicating unit 56.
また、除霜運転時のみでなく、通常冷房運転や暖房運転時において、当該空気調和装置の累積運転時間を運転累積時間計算部５７で計算し、時間に応じて回転ブラシ１３を上下させ、室外熱交換器５に付着した塵埃を掻き落とすよう制御する自動清掃モードと、使用者による任意に設定された掃除指示５８からの掃除指示信号によって、累積運転時間に関わらず回転ブラシ１３を上下させ、室外熱交換器５に付着した塵埃を掻き落とすよう制御する手動清掃モードとを備えている。 Further, not only during the defrosting operation but also during the normal cooling operation or heating operation, the accumulated operation time of the air conditioner is calculated by the operation accumulated time calculation unit 57, and the rotary brush 13 is moved up and down according to the time. With the automatic cleaning mode that controls to scrape off dust adhering to the heat exchanger 5 and the cleaning instruction signal from the cleaning instruction 58 that is arbitrarily set by the user, the rotary brush 13 is moved up and down regardless of the cumulative operation time, A manual cleaning mode for controlling to scrape off dust adhering to the outdoor heat exchanger 5 is provided.
図３において、除霜開始条件が成立すると除霜準備区間に入り、圧縮機運転周波数、室外送風機７の回転数、減圧器４の開度を可変し、所定の時間経過や所定の圧縮機温度に応じてステータス移行を行う（ＳＴ１〜３）。除霜区間のＳＴ４にて四方弁２により冷媒回路を切り換えて冷房サイクルの運転によって除霜を行う四方弁切り換え除霜を開始し、冷房時と同じ冷媒の流動方向とし、室外熱交換器５に高温高圧の冷媒を流す事により、室外熱交換器５に付着した霜を融解して除霜を行う。 In FIG. 3, when the defrosting start condition is satisfied, the defrosting preparation section is entered, the compressor operating frequency, the rotational speed of the outdoor fan 7, and the opening of the decompressor 4 are varied, and a predetermined time lapse or a predetermined compressor temperature is changed. The status transition is performed in accordance with (ST1 to ST3). In ST4 of the defrosting section, the refrigerant circuit is switched by the four-way valve 2 and the four-way valve switching defrosting that performs defrosting by the operation of the cooling cycle is started, and the flow direction of the refrigerant is the same as that at the time of cooling, and the outdoor heat exchanger 5 By flowing a high-temperature and high-pressure refrigerant, frost adhering to the outdoor heat exchanger 5 is melted and defrosted.
この時、室内送風機６、室外送風機７は停止、減圧器４は全開とし、所定の時間経過によりステータス移行する。ＳＴ５にて、圧縮機運転周波数を変え、所定の時間ｔ２を経過または所定の室外配管温度Ｄ℃以上になったとき、室外熱交換器５の着霜が溶けはじめたと判断し、回転ブラシ１３の回転ブラシ駆動制御手段５４で、回転ブラシ１３を上下に移動させる。ＳＴ５は所定の時間経過や所定の室外配管温度ａ℃以上の時にステータス移行を行う。 At this time, the indoor blower 6 and the outdoor blower 7 are stopped, the decompressor 4 is fully opened, and the status shifts when a predetermined time elapses. In ST5, the compressor operating frequency is changed, and when the predetermined time t2 has elapsed or when the predetermined outdoor pipe temperature D ° C or higher, it is determined that the frost formation of the outdoor heat exchanger 5 has started to melt, and the rotating brush 13 The rotating brush drive control means 54 moves the rotating brush 13 up and down. In ST5, status transition is performed when a predetermined time elapses or a predetermined outdoor piping temperature is a ° C. or higher.
ＳＴ６は、所定の時間経過や所定の室外配管温度ｂ℃以上の時にステータス移行を行う。このときＳＴ４からＳＴ６の最大時間はｔｍａｘとする。ＳＴ７は、所定の時間経過や所定の室外配管温度ｃ℃以上の時に、回転ブラシ駆動制御手段５４で回転ブラシ１３を上下に移動させているのを停止し、ステータス移行を行う。 In ST6, status transition is performed when a predetermined time elapses or a predetermined outdoor piping temperature b ° C. or higher. At this time, the maximum time from ST4 to ST6 is tmax. ST7 stops moving the rotating brush 13 up and down by the rotating brush drive control means 54 when a predetermined time elapses or a predetermined outdoor piping temperature c ° C. or higher, and performs a status transition.
除霜終了区間のＳＴ８、ＳＴ９にて圧縮機運転周波数を変え、室外送風機７を運転、減圧器４の開度を変え、所定の時間経過によりステータス移行を行う。ＳＴ９終了後は、再び四方弁２を切り換え、室内送風機６の運転、減圧器４を初期ｐｌｓに設定し通常暖房運転へと移行する。なお、当該実施の形態では、回転ブラシを上下に移動させる形態のみを説明したが、回転ブラシの移動は上下だけにとどまらず、左右でも前後でもよく、いずれの形態でも本願の技術範囲に含まれるものとする。 In ST8 and ST9 of the defrosting end section, the compressor operating frequency is changed, the outdoor blower 7 is operated, the opening degree of the decompressor 4 is changed, and the status transition is performed when a predetermined time elapses. After the end of ST9, the four-way valve 2 is switched again, the operation of the indoor blower 6 and the decompressor 4 are set to the initial pls, and the routine proceeds to the normal heating operation. In the embodiment, only the form in which the rotating brush is moved up and down has been described. However, the movement of the rotating brush is not limited to the up and down direction, and may be left and right or back and forth, and any form is included in the technical scope of the present application. Shall.
以上のように本発明の空気調和装置は、暖房運転時において着霜量が多くなった場合でも、室外熱交換器に付着した霜を掻き落とすよう制御するので最適な除霜時間で室温低下を抑えることができ、部屋の快適性を充分に満足させることができる。また霜溶け残りの問題も発生しない安定した除霜運転を行うことができるので、室外温度が非常に低温の寒冷地での空気調和装置にも適用できると共に、除霜しても熱交換器に付着した霜が溶け残ってしまうといった課題も解決できる。 As described above, the air conditioner of the present invention controls the frost adhering to the outdoor heat exchanger to be scraped off even when the amount of frost formation during heating operation increases. The room comfort can be sufficiently satisfied. In addition, since stable defrosting operation that does not cause frost melting problems can be performed, it can be applied to air conditioners in cold regions where the outdoor temperature is very low. The problem that the attached frost remains undissolved can also be solved.
１ 圧縮機
２ 四方弁
３ 室内熱交換器
４ 減圧器
５ 室外熱交換器
６ 室内送風機
７ 室外送風機
８ 室内機
９ 室外機
１０ 室外配管温度検出手段
１１ 室外気温度検出手段
１２ 室内気温度検出手段
１３ 回転ブラシ
１４ 回転ブラシ駆動装置
５０ 除霜開始条件判定部
５１ 圧縮機運転周波数検出手段
５２ 室内気温度検出手段
５３ 除霜時間算出部
５４ 回転ブラシ駆動制御手段
５５ 回転ブラシ回転数指示部
５６ 回転ブラシ上下移動回数指示部
５７ 累積運転時間計算部
５８ 使用者による任意に設定された掃除指示
DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Indoor heat exchanger 4 Pressure reducer 5 Outdoor heat exchanger 6 Indoor fan 7 Outdoor fan 8 Indoor unit 9 Outdoor unit 10 Outdoor piping temperature detection means 11 Outdoor air temperature detection means 12 Indoor air temperature detection means 13 Rotating brush 14 Rotating brush driving device 50 Defrosting start condition determining unit 51 Compressor operating frequency detecting unit 52 Indoor air temperature detecting unit 53 Defrosting time calculating unit 54 Rotating brush driving control unit 55 Rotating brush rotation number indicating unit 56 Rotating brush upper and lower Movement number instruction part 57 Cumulative operation time calculation part 58 Cleaning instruction arbitrarily set by the user
Claims (4)
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| JP2009078424A JP2010230240A (en) | 2009-03-27 | 2009-03-27 | Air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009078424A JP2010230240A (en) | 2009-03-27 | 2009-03-27 | Air conditioner |
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| Publication Number | Publication Date |
|---|---|
| JP2010230240A true JP2010230240A (en) | 2010-10-14 |
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| CN108800462A (en) * | 2018-05-24 | 2018-11-13 | 青岛海尔空调器有限总公司 | Air conditioner inhibits frosting control method |
| CN114216231A (en) * | 2021-12-06 | 2022-03-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Control method of air conditioner and air conditioner |
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