JPH11237097A - Multiroom air conditioner - Google Patents
Multiroom air conditionerInfo
- Publication number
- JPH11237097A JPH11237097A JP10039337A JP3933798A JPH11237097A JP H11237097 A JPH11237097 A JP H11237097A JP 10039337 A JP10039337 A JP 10039337A JP 3933798 A JP3933798 A JP 3933798A JP H11237097 A JPH11237097 A JP H11237097A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- temperature sensor
- heat exchanger
- air conditioner
- detected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、複数の室内熱交
換器を備えた多室形空気調和機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-room air conditioner provided with a plurality of indoor heat exchangers.
【０００２】[0002]
【従来の技術】複数の室内熱交換器を備えた多室形空気
調和機では、各室内熱交換器に熱交換器温度センサを取
付け、これら熱交換器温度センサの検知温度を用いて各
室内熱交換器におけるスーパーヒート量を捕らえるよう
にしている。そして、スーパーヒート量が目標スーパー
ヒート量に収束するよう、各室内熱交換器に対応する流
量調整弁の開度を調節するようにしている。2. Description of the Related Art In a multi-room air conditioner having a plurality of indoor heat exchangers, a heat exchanger temperature sensor is attached to each indoor heat exchanger, and each indoor heat exchanger is detected by using the detected temperature of the heat exchanger temperature sensor. The amount of superheat in the heat exchanger is captured. And the opening degree of the flow control valve corresponding to each indoor heat exchanger is adjusted so that the superheat amount converges to the target superheat amount.
【０００３】仮に、各熱交換器温度センサのいずれかに
異常が生じた場合には、その異常の温度センサが取付け
られている室内熱交換器に対応する流量調整弁の開度を
一定値に固定する制御が一般に採用される。If an abnormality occurs in any of the heat exchanger temperature sensors, the opening of the flow control valve corresponding to the indoor heat exchanger to which the abnormal temperature sensor is attached is set to a constant value. Fixed control is generally employed.
【０００４】[0004]
【発明が解決しようとする課題】上記のように、熱交換
器温度センサの異常に際して流量調整弁の開度が一定値
に固定されてしまうと、室内温度の変動など何らかの要
因により、各室内熱交換器への冷媒分流バランスがくず
れてしまう。こうなると、１室のみ冷媒流量が少なくな
って異常過熱を生じたり、あるいは１室のみ冷媒流量が
多くなって液バックを生じるなどの不具合を招くことに
なる。As described above, if the opening of the flow control valve is fixed at a fixed value when the heat exchanger temperature sensor is abnormal, each indoor heat may be changed due to a change in the indoor temperature. The refrigerant divergence balance to the exchanger is lost. In such a case, a problem such as an abnormal overheating due to a decrease in the flow rate of the refrigerant in only one chamber or an occurrence of liquid back due to an increase in the flow rate of the refrigerant in only one chamber is caused.
【０００５】この発明は上記の事情を考慮したもので、
その目的とするところは、各熱交換器温度センサのいず
れかに異常が生じた場合でも、その影響を最小限に抑え
て安定した運転を行うことができる信頼性にすぐれた多
室形空気調和機を提供することにある。[0005] The present invention has been made in view of the above circumstances,
The aim is to provide a reliable multi-room air conditioner that can stably operate even if an abnormality occurs in any of the heat exchanger temperature sensors, minimizing the effect. To provide machines.
【０００６】また、この発明は、スーパーヒート制御な
どに用いる温度センサの使用数を減らすことができ、こ
れによりコスト低減が図れる多室形空気調和機を提供す
ることにある。Another object of the present invention is to provide a multi-room air conditioner in which the number of temperature sensors used for superheat control or the like can be reduced, thereby reducing costs.
【０００７】[0007]
【課題を解決するための手段】第１の発明（請求項１）
の多室形空気調和機は、複数の室内熱交換器にそれぞれ
温度センサを取付けた多室形空気調和機において、各温
度センサのいずれかに異常が生じたとき、それ以外の温
度センサの検知温度を上記異常温度センサの検知温度と
して兼用する制御手段を備える。Means for Solving the Problems First Invention (Claim 1)
Is a multi-room air conditioner, in which a temperature sensor is attached to each of a plurality of indoor heat exchangers, when an abnormality occurs in any of the temperature sensors, the detection of other temperature sensors There is provided control means for also using the temperature as the detection temperature of the abnormal temperature sensor.
【０００８】第２の発明（請求項２）の多室形空気調和
機は、圧縮機、室外熱交換器、複数の室内熱交換器を接
続して冷媒を循環させる冷凍サイクル、および各室内熱
交換器への冷媒流量を調整するための複数の流量調整弁
を備え、これら流量調整弁の開度調節により各室内熱交
換器のスーパーヒート量を制御する多室形空気調和機に
おいて、各室内熱交換器のうち１つを除く室内熱交換器
に対応し、室内熱交換器から流出するガス冷媒の温度を
検知するガス側温度センサと、このガス側温度センサの
検知温度に応じて上記各流量調整弁の開度を補正する制
御手段と、を備える。[0008] A multi-room air conditioner according to a second invention (claim 2) is a refrigeration cycle for connecting a compressor, an outdoor heat exchanger, a plurality of indoor heat exchangers and circulating a refrigerant, and each indoor heat exchanger. In a multi-room air conditioner having a plurality of flow control valves for adjusting the flow rate of refrigerant to the exchanger and controlling the superheat amount of each indoor heat exchanger by adjusting the opening of these flow control valves, A gas-side temperature sensor for detecting the temperature of the gas refrigerant flowing out of the indoor heat exchanger, corresponding to the indoor heat exchanger except one of the heat exchangers, and And control means for correcting the opening of the flow control valve.
【０００９】第３の発明（請求項３）の多室形空気調和
機は、第２の発明において、制御手段が、運転開始から
一定時間は補正をしない。[0009] In the multi-room air conditioner according to a third invention (claim 3), in the second invention, the control means does not correct for a fixed time from the start of operation.
【００１０】第４の発明（請求項４）の多室形空気調和
機は、第２の発明において、制御手段が、圧縮機の運転
周波数が所定値以下の場合に補正をしない。[0010] In the multi-room air conditioner according to a fourth invention (claim 4), in the second invention, the control means does not correct when the operating frequency of the compressor is lower than a predetermined value.
【００１１】第５の発明（請求項５）の多室形空気調和
機は、第２の発明において、各室内熱交換器に熱交換器
温度センサを取付けるとともに、制御手段が、各熱交換
器温度センサの検知温度の差が所定値以上の場合に検知
温度の高い側の室内熱交換器に対応する流量調整弁の開
度を増大側に補正する機能を有する。According to a fifth aspect of the present invention, there is provided a multi-room air conditioner according to the second aspect, wherein a heat exchanger temperature sensor is attached to each indoor heat exchanger, and the control means includes a heat exchanger. When the difference between the detected temperatures of the temperature sensors is equal to or more than a predetermined value, the temperature sensor has a function of correcting the opening degree of the flow regulating valve corresponding to the indoor heat exchanger having the higher detected temperature to the increased side.
【００１２】第６の発明（請求項６）の多室形空気調和
機は、第２の発明において、圧縮機の吸込冷媒温度を検
知する吸込冷媒温度センサをさらに備え、制御手段が、
吸込冷媒温度センサの検知温度とガス側温度センサの検
知温度との差が所定値内に収まるよう各流量調整弁の開
度を補正する機能を有する。A multi-room air conditioner according to a sixth aspect of the present invention, in the second aspect, further comprises a suction refrigerant temperature sensor for detecting a suction refrigerant temperature of the compressor, and the control means includes:
It has a function of correcting the opening of each flow control valve so that the difference between the detected temperature of the suction refrigerant temperature sensor and the detected temperature of the gas side temperature sensor falls within a predetermined value.
【００１３】第７の発明（請求項７）の多室形空気調和
機は、第２の発明において、制御手段が、スーパーヒー
ト量が目標スーパーヒート量に近づくまで補正をしな
い。[0013] In the multi-room air conditioner according to a seventh aspect of the present invention, in the second aspect, the control means does not correct until the superheat amount approaches the target superheat amount.
【００１４】第８の発明（請求項８）の多室形空気調和
機は、第２の発明において、各室内熱交換器に取付けた
熱交換器温度センサと、圧縮機の吸込冷媒温度を検知す
る吸込冷媒温度センサと、上記各熱交換器温度センサの
検知温度のうち最も低い検知温度と上記吸込冷媒温度セ
ンサの検知温度との差をスーパーヒート量として各流量
調整弁の開度を制御する制御手段と、をさらに備える。According to an eighth aspect of the present invention, there is provided a multi-room air conditioner according to the second aspect, wherein a heat exchanger temperature sensor attached to each indoor heat exchanger and a refrigerant suction temperature of the compressor are detected. The difference between the lowest detected temperature among the detected temperatures of the heat exchanger temperature sensors and the detected temperature of the suction refrigerant temperature sensor is set as a superheat amount, and the opening degree of each flow control valve is controlled. And control means.
【００１５】第９の発明（請求項９）の多室形空気調和
機は、第２の発明において、圧縮機の吸込冷媒温度を検
知する吸込冷媒温度センサと、ガス側温度センサの検知
温度が上記吸込冷媒温度センサの検知温度より一定値以
上高い状態が一定時間継続した場合にガス側温度センサ
が異常であると判定する判定手段と、をさらに備えてい
る。According to a ninth invention (claim 9), in the multi-chamber air conditioner according to the second invention, the detected temperature of the suction refrigerant temperature sensor for detecting the temperature of the suction refrigerant of the compressor and the detected temperature of the gas side temperature sensor are different. A determination means for determining that the gas-side temperature sensor is abnormal when a state in which the temperature is higher than the detection temperature of the suction refrigerant temperature sensor by a predetermined value or more has continued for a predetermined period of time.
【００１６】[0016]
【発明の実施の形態】以下、この発明の一実施例につい
て図面を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【００１７】図２において、Ａは室外ユニット、Ｂ１，
Ｂ２は室内ユニットで、これらユニットに次の冷凍サイ
クルが構成される。In FIG. 2, A is an outdoor unit, and B1,
B2 is an indoor unit, and the next refrigeration cycle is configured in these units.
【００１８】圧縮機１の吐出口に四方弁２を介して室外
熱交換器３が接続され、その室外熱交換器３に液側管Ｗ
が接続される。液側管Ｗは液側管Ｗ１，Ｗ２に分岐さ
れ、その各液側管に室内熱交換器１２，２２が接続され
る。An outdoor heat exchanger 3 is connected to a discharge port of the compressor 1 through a four-way valve 2, and the outdoor heat exchanger 3 is connected to the liquid side pipe W.
Is connected. The liquid side tube W is branched into liquid side tubes W1 and W2, and the indoor heat exchangers 12 and 22 are connected to the respective liquid side tubes.
【００１９】液側管Ｗ１，Ｗ２に流量調整弁として電動
膨張弁１１，２１が設けられる。これら電動膨張弁は、
供給される駆動パルスの数に応じて開度が変化するパル
スモータバルブ（ＰＭＶ）である。Electric expansion valves 11 and 21 are provided in the liquid side pipes W1 and W2 as flow control valves. These electric expansion valves are
This is a pulse motor valve (PMV) whose opening degree changes according to the number of supplied drive pulses.
【００２０】室内熱交換器１２，２２にガス側管Ｇ１，
Ｇ２が接続され、その一方のガス側管Ｇ１にガス側温度
センサ１６が取付けられる。すなわち、室内熱交換器１
２，２２のうち１つを除く室内熱交換器１２のみに対応
させてガス側温度センサ１６を設けている。The gas side tubes G1,
G2 is connected, and a gas-side temperature sensor 16 is attached to one of the gas-side tubes G1. That is, the indoor heat exchanger 1
The gas-side temperature sensor 16 is provided so as to correspond to only the indoor heat exchanger 12 excluding one of the indoor heat exchangers 2 and 22.
【００２１】ガス側管Ｇ１，Ｇ２はガス側管Ｇに集結さ
れ、ガス側管Ｇは上記四方弁２を介して圧縮機１の吸込
口に接続される。四方弁２と圧縮機１の吸込口との間の
ガス側管Ｇには、圧縮機１の吸込冷媒温度Ｔｓを検知す
る吸込冷媒温度センサ６が取付けられる。The gas side pipes G1 and G2 are connected to the gas side pipe G, and the gas side pipe G is connected to the suction port of the compressor 1 via the four-way valve 2. A suction refrigerant temperature sensor 6 for detecting the suction refrigerant temperature Ts of the compressor 1 is attached to the gas side pipe G between the four-way valve 2 and the suction port of the compressor 1.
【００２２】室外熱交換器３の近傍に室外ファン４が設
けられ、室外熱交換器３に熱交換器温度センサ５が取付
けられる。室内熱交換器１２，２２の近傍に室内ファン
１３，２３が設けられ、室内熱交換器１２，２２に熱交
換器温度センサ１４，２４がそれぞれ取付けられる。An outdoor fan 4 is provided near the outdoor heat exchanger 3, and a heat exchanger temperature sensor 5 is attached to the outdoor heat exchanger 3. Indoor fans 13 and 23 are provided near the indoor heat exchangers 12 and 22, and heat exchanger temperature sensors 14 and 24 are attached to the indoor heat exchangers 12 and 22, respectively.
【００２３】制御回路を図１に示す。FIG. 1 shows the control circuit.
【００２４】商用交流電源４０に、室外ユニットＡの室
外制御部５０が接続される。この室外制御部５０に、四
方弁２、室外ファンモータ４Ｍ、熱交換器温度センサ
５、電動膨張弁１１，２１、ガス側温度センサ１６、イ
ンバータ回路５１、および表示器６０が接続される。The outdoor control unit 50 of the outdoor unit A is connected to the commercial AC power supply 40. The four-way valve 2, the outdoor fan motor 4M, the heat exchanger temperature sensor 5, the electric expansion valves 11 and 21, the gas-side temperature sensor 16, the inverter circuit 51, and the display 60 are connected to the outdoor control unit 50.
【００２５】インバータ回路５１は、電源４０の電圧を
整流し、それを室外制御部５０の指令に応じた周波数お
よびレベルの電圧に変換し、出力する。この出力は圧縮
機モータ１Ｍに駆動電力として供給される。The inverter circuit 51 rectifies the voltage of the power supply 40, converts the rectified voltage into a voltage and a voltage having a frequency and a level corresponding to a command from the outdoor control unit 50, and outputs the voltage. This output is supplied as drive power to the compressor motor 1M.
【００２６】室内ユニットＢ１，Ｂ２はそれぞれ室内制
御部６０を備える。この室内制御部６０に、室内温度セ
ンサ１５（２５）、熱交換器温度センサ１４（２４）、
室内ファンモータ１３Ｍ（２３Ｍ）、リモートコントロ
ール装置（以下、リモコンと略称する）６１が接続され
る。Each of the indoor units B1 and B2 has an indoor control unit 60. The indoor controller 60 includes an indoor temperature sensor 15 (25), a heat exchanger temperature sensor 14 (24),
The indoor fan motor 13M (23M) and a remote control device (hereinafter abbreviated as a remote controller) 61 are connected.
【００２７】これら室内制御部６０と上記室外制御部５
０とが、それぞれ電源ラインＡＣＬおよびデータ転送用
のシリアル信号ラインＳＬにより接続される。The indoor control unit 60 and the outdoor control unit 5
0 are connected by a power supply line ACL and a data transfer serial signal line SL, respectively.
【００２８】室内制御部６０は、主要な機能手段として
次の［１］〜［３］を有する。The indoor control section 60 has the following main functions [1] to [3].
【００２９】［１］リモコン６１の操作による運転条件
（設定温度Ｔｓを含む）、熱交換器温度センサ１４（２
４）の検知温度Ｔｃなどを電源電圧同期のシリアル信号
により室外ユニットＡに知らせる手段。[1] Operating conditions (including set temperature Ts) by operation of remote controller 61, heat exchanger temperature sensor 14 (2
Means for notifying the outdoor unit A of the detected temperature Tc and the like in 4) by a serial signal synchronized with the power supply voltage.
【００３０】［２］リモコン６１で設定される設定温度
Ｔｓと室内温度センサ１５（２５）の検知温度Ｔａとの
差ΔＴ（＝Ｔｓ−Ｔａ）を空調負荷として検出し、その
空調負荷ΔＴに対応する要求能力（要求出力周波数値）
をシリアル信号により室外ユニットＡに知らせる手段。[2] The difference ΔT (= Ts−Ta) between the set temperature Ts set by the remote controller 61 and the detected temperature Ta of the room temperature sensor 15 (25) is detected as an air conditioning load, and the detected air conditioning load corresponds to the air conditioning load ΔT. Required capacity (required output frequency value)
To the outdoor unit A by a serial signal.
【００３１】［３］室内温度センサ１５（２５）の検知
温度Ｔａ、熱交換器温度センサ１４（２４）の検知温度
Ｔｃをシリアル信号にて室外ユニットＡに知らせる手
段。[3] Means for informing the outdoor unit A of the detected temperature Ta of the indoor temperature sensor 15 (25) and the detected temperature Tc of the heat exchanger temperature sensor 14 (24) by a serial signal.
【００３２】室外制御部５０は、主要な機能手段として
次の［１］〜［７］を有する。The outdoor controller 50 has the following [1] to [7] as main functional means.
【００３３】［１］各室内ユニットからの冷房運転モー
ド指令（ドライ運転モード指令）に基づき、圧縮機１か
ら吐出される冷媒を四方弁２、室外熱交換器３、電動膨
張弁１１，２１、室内熱交換器１２，２２、四方弁２に
通して圧縮機１に戻し、冷房運転（ドライ運転）を実行
する手段。[1] Based on the cooling operation mode command (dry operation mode command) from each indoor unit, the refrigerant discharged from the compressor 1 is supplied to the four-way valve 2, the outdoor heat exchanger 3, the electric expansion valves 11 and 21, Means for returning to the compressor 1 through the indoor heat exchangers 12, 22 and the four-way valve 2 and performing a cooling operation (dry operation).
【００３４】［２］各室内ユニットからの暖房運転モー
ド指令に基づき、四方弁２を切換え、圧縮機１から吐出
される冷媒を四方弁２、室内熱交換器１２，２２、電動
膨張弁１１，２１、室外熱交換器３、四方弁２に通して
圧縮機１に戻し、暖房運転を実行する手段。[2] The four-way valve 2 is switched based on the heating operation mode command from each indoor unit, and the refrigerant discharged from the compressor 1 is supplied to the four-way valve 2, the indoor heat exchangers 12, 22, the electric expansion valves 11, 21, means for returning to the compressor 1 through the outdoor heat exchanger 3 and the four-way valve 2 and performing a heating operation.
【００３５】［３］各室内ユニットから知らされる熱交
換器温度センサ１４，２４の検知温度Ｔｃに基づいて熱
交換器温度センサ１４，２４の異常を検出し、熱交換器
温度センサ１４，２４のいずれかに異常が生じたとき、
異常のない方の熱交換器温度センサの検知温度Ｔｃを異
常のあった熱交換器温度センサの検知温度Ｔｃとして兼
用する制御手段。[3] An abnormality of the heat exchanger temperature sensors 14, 24 is detected based on the detected temperatures Tc of the heat exchanger temperature sensors 14, 24 notified from each indoor unit, and the heat exchanger temperature sensors 14, 24 are detected. When an abnormality occurs in any of
Control means for also using the detected temperature Tc of the heat exchanger temperature sensor having no abnormality as the detected temperature Tc of the abnormal heat exchanger temperature sensor.
【００３６】［４］熱交換器温度センサ１４，２４の検
知温度Ｔｃのうち最も低い検知温度Ｔｃと吸込冷媒温度
センサ６の検知温度Ｔｓとの差をスーパーヒート量ＳＨ
として求め、そのスーパーヒート量ＳＨが目標スーパー
ヒート量ＳＨｔに収束するよう電動膨張弁１１，２１の
開度を制御する制御手段。[4] The difference between the lowest detected temperature Tc among the detected temperatures Tc of the heat exchanger temperature sensors 14 and 24 and the detected temperature Ts of the suction refrigerant temperature sensor 6 is determined by the superheat amount SH.
Control means for controlling the opening of the electric expansion valves 11 and 21 so that the superheat amount SH converges to the target superheat amount SHt.
【００３７】［５］上記スーパーヒート制御に基づく電
動膨張弁１１，２１の開度をガス側温度センサ１６の検
知温度Ｔｇに応じて補正する制御手段。この制御手段
は、具体的には、熱交換器温度センサ１４，２４の検知
温度Ｔｃの差ΔＴｃが所定値以上の場合に検知温度Ｔｃ
の高い側の室内熱交換器に対応する電動膨張弁の開度を
増大側に補正する機能、および吸込冷媒温度センサ６の
検知温度Ｔｓとガス側温度センサ１６の検知温度Ｔｇと
の差が所定値内に収まるよう電動膨張弁１１，２１の開
度を補正する機能、運転開始から一定時間は上記の補正
をしない機能、圧縮機１の運転周波数（インバータ回路
５１の出力周波数）Ｆが所定値Ｆｍ以下の場合に補正を
しない機能、スーパーヒート量ＳＨが目標スーパーヒー
ト量ＳＨｓに近づくまで補正をしない機能を有する。[5] Control means for correcting the degree of opening of the electric expansion valves 11 and 21 based on the superheat control according to the detected temperature Tg of the gas temperature sensor 16. Specifically, this control means detects the detected temperature Tc when the difference ΔTc between the detected temperatures Tc of the heat exchanger temperature sensors 14 and 24 is equal to or greater than a predetermined value.
The function of correcting the opening of the electric expansion valve corresponding to the indoor heat exchanger on the higher side to the increasing side, and the difference between the detected temperature Ts of the suction refrigerant temperature sensor 6 and the detected temperature Tg of the gas side temperature sensor 16 is predetermined. The function of correcting the opening of the electric expansion valves 11 and 21 so as to fall within the value, the function of not performing the above correction for a certain period of time from the start of operation, and the operation frequency (output frequency of the inverter circuit 51) F of the compressor 1 being a predetermined value It has a function of not correcting when the temperature is equal to or less than Fm, and a function of not performing correction until the superheat amount SH approaches the target superheat amount SHs.
【００３８】［６］ガス側温度センサ１６の検知温度Ｔ
ｇが吸込冷媒温度センサ６の検知温度Ｔｓより一定値
（10Ｋ）以上高い状態が一定時間（10分）継続した場合
にガス側温度センサ１６が異常であると判定する判定手
段。[6] Detection temperature T of gas side temperature sensor 16
determining means for determining that the gas-side temperature sensor 16 is abnormal when the state in which g is higher than the detection temperature Ts of the suction refrigerant temperature sensor 6 by a predetermined value (10K) or more continues for a predetermined time (10 minutes)
【００３９】［７］判定手段がガス側温度センサ１６の
異常を判定した場合にその旨を表示器６０で表示する手
段。[7] Means for displaying on the display 60 when the judging means judges that the gas side temperature sensor 16 is abnormal.
【００４０】つぎに、上記の構成の作用を図２のフロー
チャートを参照して説明する。Next, the operation of the above configuration will be described with reference to the flowchart of FIG.
【００４１】熱交換器温度センサ１４，２４のいずれか
に異常が生じた場合（ステップ101）、異常のない正常
側の熱交換器温度センサの検知温度Ｔｃが異常のあった
熱交換器温度センサの検知温度Ｔｃとしてそのまま兼用
し、通常の制御を継続するする（ステップ102 ）。If any of the heat exchanger temperature sensors 14 and 24 is abnormal (step 101), the detected temperature Tc of the normal-side heat exchanger temperature sensor having no abnormality is determined to be abnormal. And the normal control is continued (step 102).
【００４２】運転制御の具体例を下表に示す。なお、冷
房・ドライの１室運転では、例外的に、電動膨張弁を駆
動パルス数150 の開度状態に固定するようにしている。A specific example of operation control is shown in the table below. In the single-chamber operation of cooling / drying, the electric expansion valve is exceptionally fixed at an opening state of 150 driving pulses.
【００４３】[0043]
【表１】 [Table 1]
【００４４】このようなセンサ異常に対する保護制御を
行うことにより、熱交換器温度センサ１４，２４のいず
れかに異常が生じた場合でも、その影響を最小限に抑え
て安定した運転を行うことができる。すなわち、従来の
ように、熱交換器温度センサの異常に際して電動膨張弁
の開度を一定値に固定してしまうことがないので、室内
温度の変動などがあっても、室内熱交換器１２，２２へ
の冷媒分流バランスがくずれてしまう事態を極力避ける
ことができ、たとえば１室のみ冷媒流量が少なくなって
異常過熱を生じるとか、１室のみ冷媒流量が多くなって
液バックを生じるなどの不具合を回避できる。By performing such protection control against sensor abnormality, even if an abnormality occurs in any of the heat exchanger temperature sensors 14 and 24, the effect can be minimized and stable operation can be performed. it can. That is, unlike the conventional case, the opening of the electric expansion valve is not fixed to a constant value when the heat exchanger temperature sensor is abnormal, so that even if the indoor temperature fluctuates, the indoor heat exchanger 12, It is possible to avoid as much as possible a situation in which the refrigerant branch flow to the coolant 22 is lost, and for example, the refrigerant flow rate in only one chamber is reduced to cause abnormal overheating, or the refrigerant flow rate in only one chamber is increased to cause liquid back. Can be avoided.
【００４５】一方、熱交換器温度センサ１４，２４の検
知温度Ｔｃのうち最も低い検知温度Ｔｃと吸込冷媒温度
センサ６の検知温度Ｔｓとの差がスーパーヒート量ＳＨ
として求め、そのスーパーヒート量ＳＨが目標スーパー
ヒート量ＳＨｔに収束するよう電動膨張弁１１，２１の
開度を制御する（ステップ103 ）。On the other hand, the difference between the lowest detected temperature Tc among the detected temperatures Tc of the heat exchanger temperature sensors 14 and 24 and the detected temperature Ts of the suction refrigerant temperature sensor 6 is the superheat amount SH.
The opening degree of the electric expansion valves 11 and 21 is controlled so that the superheat amount SH converges to the target superheat amount SHt (step 103).
【００４６】すなわち、電動膨張弁１１，２１を個別に
制御すると、相互干渉により冷凍サイクルが不安定にな
ってしまうが、上記のスーパーヒート制御により電動膨
張弁１１，２１の開度に対する操作量が等しくなり、冷
凍サイクルの安定化を図ることができる。That is, when the electric expansion valves 11 and 21 are individually controlled, the refrigeration cycle becomes unstable due to mutual interference. However, the superheat control described above reduces the operation amount with respect to the opening degree of the electric expansion valves 11 and 21. As a result, the refrigeration cycle can be stabilized.
【００４７】圧縮機１の起動による運転開始から一定時
間が経過し（ステップ104 のＹＥＳ）、かつ圧縮機１の
運転周波数Ｆが所定値Ｆｍを上回る状況において（ステ
ップ105 のＹＥＳ）、熱交換器温度センサ１４，２４の
検知温度Ｔｃの差ΔＴｃの絶対値が所定値（“室内温度
センサ１５，２５の検知温度Ｔａの差の絶対値”＋４
Ｋ）以上の場合（ステップ106 のＹＥＳ）、検知温度Ｔ
ｃの高い側の室内熱交換器に対応する電動膨張弁の開度
を増大側に補正する（ステップ107 ）。When a certain time has elapsed since the start of operation of the compressor 1 (YES in step 104) and the operating frequency F of the compressor 1 exceeds a predetermined value Fm (YES in step 105), the heat exchanger is operated. The absolute value of the difference ΔTc between the detected temperatures Tc of the temperature sensors 14 and 24 is a predetermined value (“the absolute value of the difference between the detected temperatures Ta of the indoor temperature sensors 15 and 25” +4).
K) or more (YES in step 106), the detected temperature T
The degree of opening of the electric expansion valve corresponding to the indoor heat exchanger having a higher value of c is increased (step 107).
【００４８】たとえば、室内温度センサ１５，２５の検
知温度Ｔａが等しくて、熱交換器温度センサ１４，２４
の検知温度Ｔｃの差ΔＴｃの絶対値が４Ｋを超えたと
き、熱交換器温度センサ１４の検知温度Ｔｃが熱交換器
温度センサ２４の検知温度Ｔｃより高ければ、その高い
側の室内熱交換器１２に対応する電動膨張弁１１の開度
をΔＰＭＶａ（＝10パルス）だけ増大する。熱交換器温
度センサ２４の検知温度Ｔｃの方が熱交換器温度センサ
１４の検知温度Ｔｃより高い場合には、室内熱交換器２
２に対応する電動膨張弁２１の開度をΔＰＭＶｂ（＝10
パルス）だけ増大する。For example, if the detected temperatures Ta of the indoor temperature sensors 15 and 25 are equal, and the heat exchanger temperature sensors 14 and 24
If the detected temperature Tc of the heat exchanger temperature sensor 14 is higher than the detected temperature Tc of the heat exchanger temperature sensor 24 when the absolute value of the difference ΔTc between the detected temperatures Tc of the heat exchangers exceeds 4K, the indoor heat exchanger on the higher side The opening degree of the electric expansion valve 11 corresponding to 12 is increased by ΔPMVa (= 10 pulses). If the detected temperature Tc of the heat exchanger temperature sensor 24 is higher than the detected temperature Tc of the heat exchanger temperature sensor 14, the indoor heat exchanger 2
The opening degree of the electric expansion valve 21 corresponding to 2 is ΔPMVb (= 10
Pulse).
【００４９】この補正制御を行うことにより、熱交換器
温度センサ１４，２４の取付け位置で冷媒が過熱状態と
なっても、それを素早く解消することできる。By performing this correction control, even if the refrigerant is overheated at the position where the heat exchanger temperature sensors 14 and 24 are mounted, it can be quickly eliminated.
【００５０】スーパーヒート量ＳＨの絶対値が設定値
“３”以内となると、スーパーヒート量ＳＨが目標スー
パーヒート量ＳＨｓに近づいたと判断する。そして、こ
のとき、吸込冷媒温度センサ６の検知温度Ｔｓとガス側
温度センサ１６の検知温度Ｔｇとの差の絶対値が所定値
（＝２Ｋ）以上の状態にあれば（ステップ108 のＹＥ
Ｓ）、その差の絶対値が所定値内に収まるよう電動膨張
弁１１，２１の開度を補正する（ステップ109 ）。When the absolute value of the superheat amount SH falls within the set value "3", it is determined that the superheat amount SH has approached the target superheat amount SHs. At this time, if the absolute value of the difference between the detected temperature Ts of the suction refrigerant temperature sensor 6 and the detected temperature Tg of the gas-side temperature sensor 16 is equal to or more than a predetermined value (= 2K) (YE in step 108).
S), the degrees of opening of the electric expansion valves 11 and 21 are corrected so that the absolute value of the difference falls within a predetermined value (step 109).
【００５１】たとえば、検知温度Ｔｓが検知温度Ｔｇよ
り高い場合は、電動膨張弁１１の開度をΔＰＭＶａ（＝
−２パルス）だけ減少し、電動膨張弁２１の開度をΔＰ
ＭＶｂ（＝＋２パルス）だけ増大する。逆に、検知温度
Ｔｇが検知温度Ｔｓより高い場合は、電動膨張弁１１の
開度をΔＰＭＶａ（＝＋２パルス）だけ増大し、電動膨
張弁２１の開度をΔＰＭＶｂ（＝−２パルス）だけ減少
する。For example, when the detected temperature Ts is higher than the detected temperature Tg, the opening of the electric expansion valve 11 is set to ΔPMVa (=
-2 pulses) and the opening of the electric expansion valve 21 is reduced by ΔP
MVb (= + 2 pulses). Conversely, when the detected temperature Tg is higher than the detected temperature Ts, the opening of the electric expansion valve 11 is increased by ΔPMVa (= + 2 pulses), and the opening of the electric expansion valve 21 is reduced by ΔPMVb (= −2 pulses). I do.
【００５２】このような制御を行うことにより、２室の
空調負荷が異なる場合でも、室内熱交換器１２，２２の
スーパーヒート量ＳＨを適正化することができる。By performing such control, the superheat amount SH of the indoor heat exchangers 12 and 22 can be optimized even when the air conditioning loads of the two rooms are different.
【００５３】なお、電動膨張弁に対する補正をスーパー
ヒート量ＳＨが目標スーパーヒート量ＳＨｓに近づいて
から行うのは、冷凍サイクル安定までの時間を短縮する
ためである。The reason why the correction for the electric expansion valve is performed after the superheat amount SH approaches the target superheat amount SHs is to shorten the time until the refrigerating cycle is stabilized.
【００５４】電動膨張弁に対する補正を運転開始から一
定時間後に行うのは、運転開始直後が冷媒の流れが安定
していないためである。The reason why the correction for the electric expansion valve is performed a predetermined time after the start of the operation is that the flow of the refrigerant is not stable immediately after the start of the operation.
【００５５】なお、上記実施例では、室内ユニットが２
台の場合を例に説明したが、室内ユニットが３台あるい
は４台以上の場合にも同様に実施可能である。In the above embodiment, the number of indoor units is two.
Although the case where the number of the indoor units is three has been described as an example, the present invention can be similarly implemented when the number of indoor units is three or four or more.
【００５６】[0056]
【発明の効果】以上述べたようにこの発明によれば、複
数の室内熱交換器にそれぞれ温度センサを取付けた多室
形空気調和機において、各温度センサのいずれかに異常
が生じたとき、それ以外の温度センサの検知温度を上記
異常温度センサの検知温度として兼用する制御手段を備
えたので、各熱交換器温度センサのいずれかに異常が生
じた場合でも、その影響を最小限に抑えて安定した運転
を行うことができる信頼性にすぐれた多室形空気調和機
を提供できる。As described above, according to the present invention, in a multi-room air conditioner in which a temperature sensor is attached to each of a plurality of indoor heat exchangers, when any of the temperature sensors becomes abnormal, Since the control means is also used to use the detection temperature of the other temperature sensors as the detection temperature of the abnormal temperature sensor, even if an abnormality occurs in any of the heat exchanger temperature sensors, the effect is minimized. It is possible to provide a highly reliable multi-room air conditioner capable of performing stable operation.
【００５７】また、この発明によれば、圧縮機、室外熱
交換器、複数の室内熱交換器を接続して冷媒を循環させ
る冷凍サイクル、および各室内熱交換器への冷媒流量を
調整するための複数の流量調整弁を備え、これら流量調
整弁の開度調節により各室内熱交換器のスーパーヒート
量を制御する多室形空気調和機において、各室内熱交換
器のうち１つを除く室内熱交換器に対応し、室内熱交換
器から流出するガス冷媒の温度を検知するガス側温度セ
ンサと、このガス側温度センサの検知温度に応じて上記
各流量調整弁の開度を補正する制御手段とを備たので、
スーパーヒート制御などに用いる温度センサの使用数を
減らすことができ、これによりコスト低減が図れる多室
形空気調和機を提供できる。Further, according to the present invention, a compressor, an outdoor heat exchanger, a refrigeration cycle for connecting a plurality of indoor heat exchangers to circulate a refrigerant, and adjusting a flow rate of the refrigerant to each indoor heat exchanger. In a multi-room air conditioner that includes a plurality of flow control valves and controls the amount of superheat of each indoor heat exchanger by adjusting the opening of the flow control valves, the room excluding one of the indoor heat exchangers A gas-side temperature sensor that corresponds to the heat exchanger and detects the temperature of the gas refrigerant flowing out of the indoor heat exchanger, and a control that corrects the opening of each of the flow control valves according to the temperature detected by the gas-side temperature sensor With the means,
The number of temperature sensors used for superheat control and the like can be reduced, whereby a multi-room air conditioner that can reduce costs can be provided.
【図１】この発明の一実施例の制御回路のブロック図。FIG. 1 is a block diagram of a control circuit according to an embodiment of the present invention.
【図２】同実施例の冷凍サイクルの構成図。FIG. 2 is a configuration diagram of a refrigeration cycle of the embodiment.
【図３】同実施例の作用を説明するためのフローチャー
ト。FIG. 3 is a flowchart for explaining the operation of the embodiment.
Ａ…室外ユニット、Ｂ１，Ｂ２…室内ユニット、１…圧
縮機、２…四方弁、３…室外熱交換器、１１，２１…電
動膨張弁（流量調整弁）、１２，２２…室内熱交換器、
１４，２４…熱交換器温度センサ、１５，２５…室内温
度センサ、１６…ガス側温度センサ、５０…室外制御
部、６０…室内制御部。A: Outdoor unit, B1, B2: Indoor unit, 1: Compressor, 2: Four-way valve, 3: Outdoor heat exchanger, 11, 21: Electric expansion valve (flow regulating valve), 12, 22: Indoor heat exchanger ,
14, 24: heat exchanger temperature sensor, 15, 25: indoor temperature sensor, 16: gas side temperature sensor, 50: outdoor control unit, 60: indoor control unit.
Claims (9)
サを取付けた多室形空気調和機において、 前記各温度センサのいずれかに異常が生じたとき、それ
以外の温度センサの検知温度を前記異常温度センサの検
知温度として兼用する制御手段を具備したことを特徴と
する多室形空気調和機。In a multi-room air conditioner in which a temperature sensor is attached to each of a plurality of indoor heat exchangers, when an abnormality occurs in any one of the temperature sensors, the detected temperature of the other temperature sensor is changed to the temperature. A multi-room air conditioner comprising a control means also serving as a temperature detected by an abnormal temperature sensor.
換器を接続して冷媒を循環させる冷凍サイクル、および
各室内熱交換器への冷媒流量を調整するための複数の流
量調整弁を備え、これら流量調整弁の開度調節により各
室内熱交換器のスーパーヒート量を制御する多室形空気
調和機において、 前記各室内熱交換器のうち１つを除く室内熱交換器に対
応し、室内熱交換器から流出するガス冷媒の温度を検知
するガス側温度センサと、 このガス側温度センサの検知温度に応じて前記各流量調
整弁の開度を補正する制御手段と、 を具備したことを特徴とする多室形空気調和機。2. A refrigeration cycle for connecting a compressor, an outdoor heat exchanger, a plurality of indoor heat exchangers and circulating a refrigerant, and a plurality of flow control valves for adjusting a flow rate of the refrigerant to each indoor heat exchanger. A multi-room air conditioner that controls the amount of superheat of each indoor heat exchanger by adjusting the opening of these flow control valves, wherein the indoor heat exchanger except one of the indoor heat exchangers is supported. A gas-side temperature sensor that detects the temperature of the gas refrigerant flowing out of the indoor heat exchanger; and a control unit that corrects the opening of each of the flow rate control valves according to the temperature detected by the gas-side temperature sensor. A multi-room air conditioner characterized by:
て、 前記制御手段は、運転開始から一定時間は補正をしない
ことを特徴とする多室形空気調和機。3. The multi-room air conditioner according to claim 2, wherein the control unit does not perform correction for a fixed time from the start of operation.
て、 前記制御手段は、圧縮機の運転周波数が所定値以下の場
合に補正をしないことを特徴とする多室形空気調和機。4. The multi-room air conditioner according to claim 2, wherein the control unit does not perform correction when the operating frequency of the compressor is equal to or lower than a predetermined value.
て、 前記各室内熱交換器に取付けた熱交換器温度センサを備
え、 前記制御手段は、前記各熱交換器温度センサの検知温度
の差が所定値以上の場合に検知温度の高い側の室内熱交
換器に対応する流量調整弁の開度を増大側に補正する機
能を有する、 ことを特徴とする多室形空気調和機。5. The multi-room air conditioner according to claim 2, further comprising a heat exchanger temperature sensor attached to each of the indoor heat exchangers, wherein the control unit detects a temperature detected by each of the heat exchanger temperature sensors. A function of correcting the opening degree of the flow control valve corresponding to the indoor heat exchanger having a higher detected temperature to an increasing side when the difference is equal to or more than a predetermined value.
て、 前記圧縮機の吸込冷媒温度を検知する吸込冷媒温度セン
サを備え、 前記制御手段は、前記吸込冷媒温度センサの検知温度と
前記ガス側温度センサの検知温度との差が所定値内に収
まるよう各流量調整弁の開度を補正する機能を有する、 ことを特徴とする多室形空気調和機。6. The multi-chamber air conditioner according to claim 2, further comprising a suction refrigerant temperature sensor for detecting a suction refrigerant temperature of the compressor, wherein the control unit is configured to detect a temperature of the suction refrigerant temperature sensor and the temperature of the suction refrigerant temperature sensor. A multi-room air conditioner having a function of correcting the opening of each flow control valve so that the difference between the temperature detected by the gas-side temperature sensor and the detected temperature falls within a predetermined value.
て、 前記制御手段は、前記スーパーヒート量が目標スーパー
ヒート量に近づくまで補正をしないことを特徴とする多
室形空気調和機。7. The multi-room air conditioner according to claim 2, wherein the control unit does not perform correction until the superheat amount approaches a target superheat amount.
て、 前記各室内熱交換器に取付けた熱交換器温度センサと、 前記圧縮機の吸込冷媒温度を検知する吸込冷媒温度セン
サと、 前記各熱交換器温度センサの検知温度のうち最も低い検
知温度と前記吸込冷媒温度センサの検知温度との差をス
ーパーヒート量として前記各流量調整弁の開度を制御す
る制御手段と、 をさらに具備したことを特徴とする多室形空気調和機。8. The multi-room air conditioner according to claim 2, wherein a heat exchanger temperature sensor attached to each of the indoor heat exchangers; a suction refrigerant temperature sensor for detecting a suction refrigerant temperature of the compressor; Control means for controlling the degree of opening of each of the flow rate regulating valves with a difference between the lowest detected temperature among the detected temperatures of the heat exchanger temperature sensors and the detected temperature of the suction refrigerant temperature sensor as a superheat amount, A multi-room air conditioner, comprising:
て、 前記圧縮機の吸込冷媒温度を検知する吸込冷媒温度セン
サと、 前記ガス側温度センサの検知温度が前記吸込冷媒温度セ
ンサの検知温度より一定値以上高い状態が一定時間継続
した場合にガス側温度センサが異常であると判定する判
定手段と、 をさらに具備したことを特徴とする多室形空気調和機。9. The multi-chamber air conditioner according to claim 2, wherein a suction refrigerant temperature sensor for detecting a suction refrigerant temperature of the compressor, and a detection temperature of the gas side temperature sensor is a detection of the suction refrigerant temperature sensor. A determination unit that determines that the gas-side temperature sensor is abnormal when a state in which the temperature is higher than the temperature by a predetermined value or more has continued for a predetermined time; and a multi-room air conditioner further comprising:
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10039337A JPH11237097A (en) | 1998-02-20 | 1998-02-20 | Multiroom air conditioner |
| TW088101324A TW368587B (en) | 1998-02-20 | 1999-01-28 | Multi-chamber air conditioner |
| CN99102237A CN1121585C (en) | 1998-02-20 | 1999-02-10 | Multi-room type air conditioner |
| KR1019990004959A KR100311859B1 (en) | 1998-02-20 | 1999-02-12 | Air conditioner having a number of indoor heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10039337A JPH11237097A (en) | 1998-02-20 | 1998-02-20 | Multiroom air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11237097A true JPH11237097A (en) | 1999-08-31 |
Family
ID=12550287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10039337A Pending JPH11237097A (en) | 1998-02-20 | 1998-02-20 | Multiroom air conditioner |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH11237097A (en) |
| KR (1) | KR100311859B1 (en) |
| CN (1) | CN1121585C (en) |
| TW (1) | TW368587B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001040716A1 (en) * | 1999-11-30 | 2001-06-07 | Daikin Industries, Led. | Multiple air conditioners |
| KR100715999B1 (en) * | 2005-10-26 | 2007-05-09 | 삼성전자주식회사 | Multi Airconditioner and its operating Method |
| CN103791596A (en) * | 2014-01-21 | 2014-05-14 | 宁波奥克斯电气有限公司 | Method for judging whether resistance values of temperature sensors of multi-union air conditioner of refrigeration mode deviate |
| KR20180041446A (en) * | 2016-10-14 | 2018-04-24 | 엘지전자 주식회사 | Control method of air conditioning apparatus |
| CN113432244A (en) * | 2021-07-07 | 2021-09-24 | 宁波奥克斯电气股份有限公司 | Exhaust sensor falling detection method and device and air conditioner |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5381038B2 (en) * | 2008-01-18 | 2014-01-08 | 三洋電機株式会社 | COOLING SYSTEM, CONTROL DEVICE AND CONTROL PROGRAM |
| CN103791587B (en) * | 2014-01-21 | 2016-08-24 | 宁波奥克斯电气股份有限公司 | Judge the method whether the heat detector resistance of the combined air conditioners of heating mode offsets |
| CN107449116A (en) * | 2017-07-21 | 2017-12-08 | 杜杰 | Base station air conditioner control system and its control method based on communication network |
| CN108361914A (en) * | 2018-01-22 | 2018-08-03 | 青岛海尔空调器有限总公司 | Control method, control system and the air conditioner of air conditioner |
| JP6746253B1 (en) * | 2019-06-04 | 2020-08-26 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
-
1998
- 1998-02-20 JP JP10039337A patent/JPH11237097A/en active Pending
-
1999
- 1999-01-28 TW TW088101324A patent/TW368587B/en not_active IP Right Cessation
- 1999-02-10 CN CN99102237A patent/CN1121585C/en not_active Expired - Fee Related
- 1999-02-12 KR KR1019990004959A patent/KR100311859B1/en not_active IP Right Cessation
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001040716A1 (en) * | 1999-11-30 | 2001-06-07 | Daikin Industries, Led. | Multiple air conditioners |
| KR100715999B1 (en) * | 2005-10-26 | 2007-05-09 | 삼성전자주식회사 | Multi Airconditioner and its operating Method |
| CN103791596A (en) * | 2014-01-21 | 2014-05-14 | 宁波奥克斯电气有限公司 | Method for judging whether resistance values of temperature sensors of multi-union air conditioner of refrigeration mode deviate |
| CN103791596B (en) * | 2014-01-21 | 2016-08-24 | 宁波奥克斯电气股份有限公司 | Judge the method whether the heat detector resistance of the combined air conditioners of refrigeration mode offsets |
| KR20180041446A (en) * | 2016-10-14 | 2018-04-24 | 엘지전자 주식회사 | Control method of air conditioning apparatus |
| CN113432244A (en) * | 2021-07-07 | 2021-09-24 | 宁波奥克斯电气股份有限公司 | Exhaust sensor falling detection method and device and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100311859B1 (en) | 2001-11-02 |
| CN1227335A (en) | 1999-09-01 |
| CN1121585C (en) | 2003-09-17 |
| KR19990072624A (en) | 1999-09-27 |
| TW368587B (en) | 1999-09-01 |
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