JP2014074533A - Multi-type air conditioner - Google Patents
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本発明は、室内機が正しく接続されているかどうかの接続判定をする制御手段を設けたマルチ形空気調和装置に関するものである。 The present invention relates to a multi-type air conditioner provided with control means for determining whether or not an indoor unit is correctly connected.
従来、マルチ形空気調和装置は、複数台の室内機と室外機とで構成されている（例えば、特許文献１参照）。 Conventionally, a multi-type air conditioner is configured by a plurality of indoor units and outdoor units (see, for example, Patent Document 1).
図１は、従来のマルチ形空気調和装置のブロック図である。 FIG. 1 is a block diagram of a conventional multi-type air conditioner.
Ａ室内機１は、室外機３と冷媒配管４で接続されている。Ａ室内機１には、室内熱交換器温度センサ６、吸い込み温度センサ７が設けられている。 The A indoor unit 1 is connected to the outdoor unit 3 through the refrigerant pipe 4. The A indoor unit 1 is provided with an indoor heat exchanger temperature sensor 6 and a suction temperature sensor 7.
また、Ｂ室内機２も、室外機３と冷媒配管５で接続されている。Ｂ室内機２には、室内熱交換器温度センサ８、吸い込み温度センサ９が設けられている。 The B indoor unit 2 is also connected to the outdoor unit 3 through the refrigerant pipe 5. The B indoor unit 2 is provided with an indoor heat exchanger temperature sensor 8 and a suction temperature sensor 9.
室外機３は、Ａ室内機１およびＢ室内機２との間で、冷媒配管４および冷媒配管５により冷媒を循環させている。室外機３は、圧縮機１２により冷媒を循環させるが、Ａ室内機１に使用する膨張弁１３、Ｂ室内機２に使用する膨張弁１４により冷媒を分配する構成をとっている。 In the outdoor unit 3, the refrigerant is circulated through the refrigerant pipe 4 and the refrigerant pipe 5 between the A indoor unit 1 and the B indoor unit 2. The outdoor unit 3 circulates the refrigerant by the compressor 12, but has a configuration in which the refrigerant is distributed by the expansion valve 13 used for the A indoor unit 1 and the expansion valve 14 used for the B indoor unit 2.
しかしながら、前記従来の構成では、マルチ形空気調和装置を据え付け工事終了後に、室外機３と接続するＡ室内機１、Ｂ室内機２において、Ａ室内機１と接続する冷媒配管４、そしてＢ室内機２と接続する冷媒配管５とが正しく接続されているかどうかを確認しなければいけなかった。 However, in the conventional configuration, after the installation work of the multi-type air conditioner is completed, in the A indoor unit 1 and the B indoor unit 2 connected to the outdoor unit 3, the refrigerant pipe 4 connected to the A indoor unit 1 and the B room It was necessary to check whether the refrigerant pipe 5 connected to the machine 2 was correctly connected.
例えば、Ａ室内機１に冷媒配管５を接続し、Ｂ室内機２に冷媒配管４を接続する場合があるので接続確認を行う必要がある。その場合、Ａ室内機１、Ｂ室内機２を順番に冷房運転を行い、それぞれの室内熱交換器温度センサ６、８が検出する温度が低下しているかを確認し、室内機と室外機が正しく接続されているかを確認する。 For example, since the refrigerant pipe 5 may be connected to the A indoor unit 1 and the refrigerant pipe 4 may be connected to the B indoor unit 2, it is necessary to check the connection. In that case, the A indoor unit 1 and the B indoor unit 2 are sequentially cooled, and it is confirmed whether the temperatures detected by the indoor heat exchanger temperature sensors 6 and 8 are lowered. Check that the connection is correct.
しかしながら、室内熱交換器温度センサ６、８の温度低下を検出するのに時間がかかったり、誤検出するという課題を有していた。 However, it takes time to detect the temperature drop of the indoor heat exchanger temperature sensors 6 and 8, and there is a problem of erroneous detection.
本発明は、前記従来の課題を解決するもので、複数の室内機と室外機との冷媒配管接続確認を短時間に精度良く行うことのできるマルチ形空気調和装置を提供することを目的とする。 The present invention solves the above-described conventional problems, and an object of the present invention is to provide a multi-type air conditioner capable of accurately confirming refrigerant pipe connection between a plurality of indoor units and outdoor units in a short time. .
前記従来の課題を解決するために、本発明のマルチ形空気調和装置は、圧縮機、室外熱交換器、四方弁、及び流量制御膨張弁を有する室外機と、送風用のファン、室内熱交換器
、前記室内熱交換器の吸い込み温度を検出する吸い込み温度センサを有する複数の室内機とを冷媒配管で接続するマルチ形空気調和装置において、前記吸い込み温度センサが検出する吸い込み温度の初期値と、所定時間後の吸い込み温度の所定値との温度差が、一定値以上であると前記複数の室内機と前記室外機とが正しく接続されていると判定し、一定値未満であると前記複数の室内機と前記室外機とが正しく接続されていないと判定する、接続判定手段を設けたものである。
In order to solve the conventional problems, a multi-type air conditioner of the present invention includes an outdoor unit having a compressor, an outdoor heat exchanger, a four-way valve, and a flow control expansion valve, a fan for blowing air, and an indoor heat exchange. In a multi-type air conditioner that connects a plurality of indoor units having a suction temperature sensor that detects a suction temperature of the indoor heat exchanger with a refrigerant pipe, an initial value of the suction temperature detected by the suction temperature sensor; It is determined that the plurality of indoor units and the outdoor unit are correctly connected if the temperature difference from the predetermined value of the suction temperature after a predetermined time is a certain value or more, and if the temperature difference is less than a certain value, the plurality of Connection determination means for determining that the indoor unit and the outdoor unit are not correctly connected is provided.
これによって、複数の室内機と室外機とを取り付けたマルチ形空気調和装置において、据え付け工事終了後にそれぞれの室内機と冷媒配管が正しく取り付けられているかを判定する場合に、室内機の吸い込み温度センサを使用することにより、室内機の雰囲気温度の変化を少なくし、冷媒の温度変化を精度良く短時間に判定することができる。 As a result, in a multi-type air conditioner in which a plurality of indoor units and outdoor units are attached, when determining whether each indoor unit and refrigerant piping are correctly attached after the installation work is completed, the suction temperature sensor of the indoor unit By using this, the change in the atmospheric temperature of the indoor unit can be reduced, and the change in the temperature of the refrigerant can be accurately determined in a short time.
本発明は、複数の室内機と室外機を取り付けたマルチ形空気調和装置において、据え付け工事終了後にそれぞれの室内機と冷媒配管が正しく取り付けられているかを判定する場合に、室内機の吸い込み温度センサを使用することにより、短時間に精度良く判定することができる。 The present invention relates to a multi-type air conditioner in which a plurality of indoor units and outdoor units are attached. When determining whether each indoor unit and refrigerant piping are correctly attached after the installation work is completed, the suction temperature sensor of the indoor unit By using this, it is possible to determine with high accuracy in a short time.
第１の発明は、圧縮機、室外熱交換器、四方弁、及び流量制御膨張弁を有する室外機と、送風用のファン、室内熱交換器、前記室内熱交換器の吸い込み温度を検出する吸い込み温度センサを有する複数の室内機とを冷媒配管で接続するマルチ形空気調和装置において、前記吸い込み温度センサが検出する吸い込み温度の初期値と、所定時間後の吸い込み温度の所定値との温度差が、一定値以上であると前記複数の室内機と前記室外機とが正しく接続されていると判定し、一定値未満であると前記複数の室内機と前記室外機とが正しく接続されていないと判定する、接続判定手段を設けたことにより、据え付け工事終了後にそれぞれの室内機と冷媒配管が正しく取り付けられているかを判定する場合に、室内機の吸い込み温度センサを使用することにより、室内機の雰囲気温度の変化を少なくし、冷媒の温度変化を精度良く短時間に判定することができる。 The first invention includes an outdoor unit having a compressor, an outdoor heat exchanger, a four-way valve, and a flow control expansion valve, a fan for blowing air, an indoor heat exchanger, and a suction for detecting a suction temperature of the indoor heat exchanger In a multi-type air conditioner in which a plurality of indoor units having temperature sensors are connected by refrigerant piping, a temperature difference between an initial value of the suction temperature detected by the suction temperature sensor and a predetermined value of the suction temperature after a predetermined time is obtained. The plurality of indoor units and the outdoor unit are determined to be correctly connected if they are above a certain value, and the plurality of indoor units and the outdoor unit are not properly connected if they are less than a certain value. Use the indoor unit suction temperature sensor to determine whether each indoor unit and refrigerant piping are correctly installed after the installation work is completed by providing connection determination means And it allows to reduce the change in the ambient temperature of the indoor unit can be determined in a short time with high accuracy temperature variation of the refrigerant.
第２の発明は、前記流量制御膨張弁の近傍配管温度を検出する膨張弁近傍配管温度センサを備え、前記膨張弁近傍配管温度センサが検出する膨張弁近傍配管温度の初期値と、所定時間後の膨張弁近傍配管温度の所定値との温度差が、一定値以上であると前記複数の室内機と前記室外機とが正しく接続されていると判定し、一定値未満であると前記複数の室内機と前記室外機とが正しく接続されていないと判定する、接続判定手段を設けたことにより、据え付け工事終了後にそれぞれの室内機と冷媒配管が正しく取り付けられているかを判定する場合に、膨張弁近傍配管温度センサを使用することにより、室内機の雰囲気温度の変化を少なくし、冷媒の温度変化を精度良く短時間に判定することができる。 A second invention includes an expansion valve vicinity pipe temperature sensor for detecting a pipe temperature near the flow control expansion valve, and an initial value of the expansion valve vicinity pipe temperature detected by the expansion valve vicinity pipe temperature sensor and a predetermined time later. It is determined that the plurality of indoor units and the outdoor unit are correctly connected when the temperature difference from the predetermined value of the pipe temperature near the expansion valve is a certain value or more, and when the temperature difference is less than a certain value, the plurality of When determining whether each indoor unit and refrigerant piping are correctly installed after the installation work is completed by providing connection determination means that determines that the indoor unit and the outdoor unit are not correctly connected, expansion By using the valve vicinity pipe temperature sensor, the change in the atmospheric temperature of the indoor unit can be reduced, and the change in the temperature of the refrigerant can be accurately determined in a short time.
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におけるマルチ形空気調和装置のブロック図である（従来の実施の形態と同じである）。冷房時は、圧縮機１２から吐出された冷媒は、室外機３か
らＡ室内機１へは、膨張弁１３、冷媒配管４、室内熱交換器１０、四方弁１７を通り圧縮機１２へと戻る。一方、Ｂ室内機２へは膨張弁１４、冷媒配管５、室内熱交換器１１、四方弁１７を通り圧縮機１２へと戻る。
(Embodiment 1)
FIG. 1 is a block diagram of a multi-type air conditioner according to an embodiment of the present invention (the same as the conventional embodiment). During cooling, the refrigerant discharged from the compressor 12 returns from the outdoor unit 3 to the A indoor unit 1 through the expansion valve 13, the refrigerant pipe 4, the indoor heat exchanger 10, and the four-way valve 17 and returns to the compressor 12. . On the other hand, the B indoor unit 2 returns to the compressor 12 through the expansion valve 14, the refrigerant pipe 5, the indoor heat exchanger 11, and the four-way valve 17.
また、暖房時は、四方弁１７が切り替わり、冷房時とは逆方向に冷媒が流れる。 Further, the four-way valve 17 is switched during heating, and the refrigerant flows in the opposite direction to that during cooling.
図２は、本発明の実施の形態における室内機内の温度センサの温度変化を示すグラフである。一般的に室内熱交換器温度は、冷媒が流れるため温度の低下が大きく、吸い込み温度は温度の低下が小さい。しかし、熱交換器温度は室内温度、外気温度に応じて変化幅が大きく、また運転開始後から低圧が落ちることで温度が低下しやすい。また、冷媒に過剰に反応するために判定までに時間が必要になるので、熱交換器温度よりも吸い込み温度の温度変化により、短時間に精度よく判定することができる。 FIG. 2 is a graph showing a temperature change of the temperature sensor in the indoor unit according to the embodiment of the present invention. In general, the indoor heat exchanger temperature has a large temperature drop because the refrigerant flows, and the suction temperature has a small temperature drop. However, the temperature of the heat exchanger varies greatly according to the room temperature and the outside air temperature, and the temperature is likely to decrease due to a drop in the low pressure after the start of operation. Moreover, since it takes time to make a determination because it reacts excessively with the refrigerant, it can be accurately determined in a short time by the temperature change of the suction temperature rather than the heat exchanger temperature.
そして、接続判定する方法として、一般的に室内機を１台ずつ判定する。Ａ室内機１から判定する場合は、膨張弁１４を閉じてＡ室内機１にのみ冷媒を流し、室内吸い込み温度センサ７が検出する温度の初期値と、所定時間後の室内吸い込み温度センサ７が検出する温度の所定値との温度差（｜初期値−所定値｜）が一定値Ｅ以上になれば、冷媒が正しく流れていると判定する。しかし、この温度差が一定値Ｅ未満であれば、冷媒が正しく流れていないと判定する。 As a method for determining connection, generally, indoor units are determined one by one. When determining from the A indoor unit 1, the expansion valve 14 is closed and the refrigerant is allowed to flow only to the A indoor unit 1, and the initial value of the temperature detected by the indoor suction temperature sensor 7 and the indoor suction temperature sensor 7 after a predetermined time are determined. If the temperature difference (| initial value−predetermined value |) between the detected temperature and the predetermined value is equal to or greater than a certain value E, it is determined that the refrigerant is flowing correctly. However, if this temperature difference is less than a certain value E, it is determined that the refrigerant is not flowing correctly.
そして、その後、Ｂ室内機２についても、膨張弁１３を閉じてＢ室内機２にのみ冷媒を流し、吸い込み温度センサ９が検出する温度の初期値と、所定時間後の室内吸い込み温度センサ９が検出する温度の所定値との温度差（｜初期値−所定値｜）により、Ａ室内機１と同様に冷媒の流れを判定する。 After that, for the B indoor unit 2, the expansion valve 13 is closed and the refrigerant is allowed to flow only through the B indoor unit 2, and the initial value of the temperature detected by the suction temperature sensor 9 and the indoor suction temperature sensor 9 after a predetermined time are The refrigerant flow is determined in the same manner as the A indoor unit 1 based on the temperature difference (| initial value−predetermined value |) of the detected temperature.
なお、より精度を上げるために、温度差を１〜ｎ回まで積算して判定を行う。室内機に冷媒を流す時に室内送風がショートサーキットするようにすることにより、短時間に精度良く判定することができる。 In order to improve accuracy, the temperature difference is integrated up to 1 to n times for determination. By making the indoor air flow a short circuit when the refrigerant is allowed to flow through the indoor unit, it can be accurately determined in a short time.
図３は、本発明の実施の形態における室外機内の温度センサの温度変化を示すグラフである。室外機の液管温度センサ１５、１６、およびガス管温度センサ１８、１９を使うことにより、室外機のみでも誤配管を判定することができる。 FIG. 3 is a graph showing a temperature change of the temperature sensor in the outdoor unit in the embodiment of the present invention. By using the liquid pipe temperature sensors 15 and 16 and the gas pipe temperature sensors 18 and 19 of the outdoor unit, it is possible to determine erroneous piping only with the outdoor unit.
Ａ室内機１から判定する場合は、膨張弁１４を閉じてＡ室内機１にのみ冷媒を流し、初期値（液管温度センサ１５が検出する温度とガス管温度センサ１８が検出する温度から算出）と所定値（所定時間後の、液管温度センサ１５が検出する温度とガス管温度センサ１８が検出する温度から算出）との温度差（｜初期値−所定値｜）が一定値Ｅ以上になれば、冷媒が正しく流れていると判定する。しかし、この温度差が一定値Ｅ未満であれば、冷媒が正しく流れていないと判定する。 When determining from the indoor unit A, the expansion valve 14 is closed and the refrigerant is allowed to flow only through the indoor unit 1, and the initial value (calculated from the temperature detected by the liquid pipe temperature sensor 15 and the temperature detected by the gas pipe temperature sensor 18). ) And a predetermined value (calculated from the temperature detected by the liquid pipe temperature sensor 15 and the temperature detected by the gas pipe temperature sensor 18 after a predetermined time) (| initial value−predetermined value |) is equal to or greater than a predetermined value E If it becomes, it will determine with the refrigerant | coolant flowing correctly. However, if this temperature difference is less than a certain value E, it is determined that the refrigerant is not flowing correctly.
Ｂ室内機２についても、膨張弁１３を閉じてＢ室内機２にのみ冷媒を流し、初期値（液管温度センサ１６が検出する温度とガス管温度センサ１９が検出する温度から算出）と所定値（所定時間後の、液管温度センサ１６が検出する温度とガス管温度センサ１９が検出する温度から算出）との温度差（｜初期値−所定値｜）により、Ａ室内機１と同様に冷媒の流れを判定する。そして、より精度を上げるために、温度差を１〜ｎ回まで積算して判定を行う。 For the B indoor unit 2 as well, the expansion valve 13 is closed and the refrigerant is allowed to flow only through the B indoor unit 2, and the initial value (calculated from the temperature detected by the liquid pipe temperature sensor 16 and the temperature detected by the gas pipe temperature sensor 19) and a predetermined value are set. Similar to the A indoor unit 1 by the temperature difference (| initial value−predetermined value |) between the values (calculated from the temperature detected by the liquid pipe temperature sensor 16 and the temperature detected by the gas pipe temperature sensor 19 after a predetermined time). The refrigerant flow is determined. And in order to raise a precision more, a temperature difference is integrated to 1 to n times and it determines.
なお、初期値、所定値および温度差は以下の計算式で算出する。 The initial value, the predetermined value, and the temperature difference are calculated by the following calculation formula.
初期値＝Ａ×液管温度＋Ｂ×ガス管温度
所定値＝Ｃ×液管温度＋Ｄ×ガス管温度
そして、所定値は精度を上げるために積算を行う。
Initial value = A × Liquid pipe temperature + B × Gas pipe temperature Predetermined value = C × Liquid pipe temperature + D × Gas pipe temperature The predetermined value is integrated to increase accuracy.
温度差＝｜初期値−（所定値１＋所定値２＋・・・所定値ｎ）／ｎ｜
温度差が大きければ、冷媒が各々の室内機の熱交換器に流れていることを示している。初期値、所定値は、係数値Ａ、Ｂ、Ｃ、Ｄを変化させることにより、より正確に判定を行うことができる。
Temperature difference = | initial value− (predetermined value 1 + predetermined value 2+... Predetermined value n) / n |
If the temperature difference is large, it indicates that the refrigerant is flowing in the heat exchanger of each indoor unit. The initial value and the predetermined value can be determined more accurately by changing the coefficient values A, B, C, and D.
これらの判定制御を据え付け工事後に行い、冷媒配管が正しく取り付けられているかどうかの判定を行うことができる。 These determination controls can be performed after installation work to determine whether or not the refrigerant pipe is correctly attached.
以上のように、本発明にかかるマルチ形空気調和装置は、冷媒配管が正しく取り付けられているかどうかを短時間に精度良く判定することができ、２室以上のマルチ形空気調和装置の用途にも適用できる。 As described above, the multi-type air conditioner according to the present invention can accurately determine in a short time whether or not the refrigerant pipe is correctly attached, and can also be used for a multi-type air conditioner having two or more rooms. Applicable.
１ Ａ室内機
２ Ｂ室内機
３ 室外機
４ 冷媒配管
５ 冷媒配管
６ 室内熱交換器温度センサ
７ 吸い込み温度センサ
８ 室内熱交換器温度センサ
９ 吸い込み温度センサ
１０ 室内熱交換器
１１ 室内熱交換器
１２ 圧縮機
１３ 膨張弁
１４ 膨張弁
１５ 液管温度センサ
１６ 液管温度センサ
１７ 四方弁
１８ ガス管温度センサ
１９ ガス管温度センサ
DESCRIPTION OF SYMBOLS 1 A indoor unit 2 B indoor unit 3 Outdoor unit 4 Refrigerant piping 5 Refrigerant piping 6 Indoor heat exchanger temperature sensor 7 Suction temperature sensor 8 Indoor heat exchanger temperature sensor 9 Suction temperature sensor 10 Indoor heat exchanger 11 Indoor heat exchanger 12 Compressor 13 Expansion valve 14 Expansion valve 15 Liquid pipe temperature sensor 16 Liquid pipe temperature sensor 17 Four-way valve 18 Gas pipe temperature sensor 19 Gas pipe temperature sensor
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3376126A4 (en) * | 2015-11-12 | 2019-06-19 | Toshiba Carrier Corporation | Air conditioning system |
-
2012
- 2012-10-04 JP JP2012221977A patent/JP2014074533A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3376126A4 (en) * | 2015-11-12 | 2019-06-19 | Toshiba Carrier Corporation | Air conditioning system |
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