JP2002071188A - Abnormal heating medium supply detection apparatus - Google Patents
Abnormal heating medium supply detection apparatusInfo
- Publication number
- JP2002071188A JP2002071188A JP2000260291A JP2000260291A JP2002071188A JP 2002071188 A JP2002071188 A JP 2002071188A JP 2000260291 A JP2000260291 A JP 2000260291A JP 2000260291 A JP2000260291 A JP 2000260291A JP 2002071188 A JP2002071188 A JP 2002071188A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat medium
- supply
- detected
- supply abnormality
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 title claims description 31
- 230000002159 abnormal effect Effects 0.000 title abstract description 13
- 239000003507 refrigerant Substances 0.000 claims abstract description 60
- 230000005856 abnormality Effects 0.000 claims description 88
- 238000004378 air conditioning Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 14
- 238000001816 cooling Methods 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱媒供給異常検出
装置に関し、詳しくは、室外機から供給された熱媒を用
いて空気調和を行なう少なくとも一つの室内機を備える
空気調和機における熱媒の供給異常を検出する熱媒供給
異常検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat medium supply abnormality detecting device, and more particularly, to a heat medium in an air conditioner having at least one indoor unit for performing air conditioning using a heat medium supplied from an outdoor unit. The present invention relates to a heat medium supply abnormality detection device that detects a supply abnormality of a heat medium.
【０００２】[0002]
【従来の技術】従来、空気調和機における熱媒供給異常
を検出する方法として、一台の室外機に対して複数台の
室内機を備え、各々室内機に対して停止・送風・冷房な
どの運転状態を変更し、熱媒供給異常を検出する方法が
提案されている。このような検出方法は、一旦空気調和
機の運転を中止して行なわれる。2. Description of the Related Art Conventionally, as a method for detecting a heat medium supply abnormality in an air conditioner, one outdoor unit is provided with a plurality of indoor units, and each indoor unit is stopped, blown, cooled, etc. There has been proposed a method of changing an operation state and detecting a heating medium supply abnormality. Such a detection method is performed by temporarily stopping the operation of the air conditioner.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな方法では、一旦空気調和機の運転を中止して熱供給
異常の発生を検出するので、通常運転時には異常の検出
ができず、異常の発見が遅れてしまう場合がある。ま
た、室内機１台毎に運転状態を変更するので、室内機の
台数が多いと異常を起こしている室内機の特定に長時間
を要してしまう場合がある。However, in such a method, since the operation of the air conditioner is temporarily stopped to detect the occurrence of the heat supply abnormality, the abnormality cannot be detected during the normal operation, and the abnormality is detected. May be delayed. Further, since the operation state is changed for each indoor unit, if the number of indoor units is large, it may take a long time to identify the abnormal indoor unit.
【０００４】本発明の熱媒供給異常検出装置は、空気調
和機の運転中に熱媒供給異常を検出することを目的の一
つとする。また、本発明の熱媒供給異常検出装置は、短
時間で熱媒供給異常を起こしている室内機を特定するこ
とを目的の一つとする。An object of the present invention is to detect a heat medium supply abnormality during operation of an air conditioner. Another object of the present invention is to identify an indoor unit having a heat medium supply abnormality in a short time.
【０００５】[0005]
【課題を解決するための手段およびその作用・効果】本
発明の熱媒供給異常検出装置は、上述の目的の少なくと
も一部を達成するために以下の手段を採った。Means for Solving the Problems and Their Functions and Effects The heat medium supply abnormality detecting device of the present invention employs the following means in order to achieve at least a part of the above object.
【０００６】本発明の熱媒供給異常検出装置は、室外機
から供給された熱媒を用いて空気調和を行なう少なくと
も一つの室内機を備える空気調和機における前記熱媒の
供給異常を検出する熱媒供給異常検出装置であって、前
記熱媒の供給と供給の停止とを行なう熱媒供給停止手段
と、内部に前記熱媒が流れる熱媒配管の前記熱媒供給停
止手段の下流側における内部，外壁，近傍のいずれかの
温度を検出する第１温度検出手段と、前記室内機が設置
された室内の温度を検出する室温検出手段と、前記第１
温度検出手段で検出した温度と前記室温検出手段で検出
した室内の温度とに基づいて前記熱媒の供給異常を判定
する供給異常判定手段と、を備えることを要旨とする。A heat medium supply abnormality detecting device according to the present invention is a heat medium supply apparatus for detecting an abnormality in supply of the heat medium in an air conditioner having at least one indoor unit for performing air conditioning using a heat medium supplied from an outdoor unit. A medium supply abnormality detection device, comprising: a heating medium supply stopping unit that supplies and stops the supply of the heating medium; and a heating medium pipe in which the heating medium flows inside the heating medium supply unit downstream of the heating medium supply stopping unit. First temperature detecting means for detecting a temperature of any one of the indoor unit, the outer wall, and the vicinity; a room temperature detecting means for detecting a temperature in a room where the indoor unit is installed;
The gist of the present invention is to include a supply abnormality determination unit that determines an abnormality in supply of the heat medium based on the temperature detected by the temperature detection unit and the indoor temperature detected by the room temperature detection unit.
【０００７】本発明の熱媒供給異常検出装置では、第１
温度検出手段で検出した温度と室温検出手段で検出した
室内の温度とに基づいて熱媒の供給異常を判定するの
で、空気調和機の運転中に熱媒の供給異常を検出するこ
とができる。この結果、異常を早期に発見することがで
きる。また、室内機が複数台設置されていても、他の室
内機の運転中に熱媒の供給異常を検出することができ
る。この結果、異常を早期に発見できるし、異常を起こ
している室内機を短時間で特定することができる。In the heat medium supply abnormality detecting device of the present invention, the first
Since the supply abnormality of the heat medium is determined based on the temperature detected by the temperature detection means and the indoor temperature detected by the room temperature detection means, the supply abnormality of the heat medium can be detected during the operation of the air conditioner. As a result, an abnormality can be found early. Further, even when a plurality of indoor units are installed, it is possible to detect a supply abnormality of the heat medium during operation of another indoor unit. As a result, an abnormality can be found at an early stage, and the indoor unit having the abnormality can be identified in a short time.
【０００８】この本発明の熱媒供給異常検出装置におい
て、前記供給異常判定手段は、前記熱媒の供給を停止し
ている状態の際には、前記第１温度検出手段で検出した
温度と前記室温検出手段で検出した温度との差が所定値
より大きいときに異常と判定する手段であるものとする
こともできる。こうすれば、熱媒の供給を停止している
状態の際の異常を検出することができる。In the heat medium supply abnormality detecting device according to the present invention, when the supply of the heat medium is stopped, the supply abnormality determination means determines whether the temperature detected by the first temperature detection means is equal to the temperature detected by the first temperature detection means. If the difference from the temperature detected by the room temperature detecting means is larger than a predetermined value, the means may be determined to be abnormal. This makes it possible to detect an abnormality when the supply of the heat medium is stopped.
【０００９】この本発明の熱媒供給異常検出装置におい
て、前記第１温度検出手段の下流側に設けられた熱交換
器の下流側における前記熱媒配管の内部，外壁，近傍の
いずれかの温度を検出する第２温度検出手段を備え、前
記供給異常判定手段は、前記熱媒の供給を停止している
状態の際には、前記第１温度検出手段で検出した温度と
前記室温検出手段で検出した温度との差が第１の所定値
より大きくて前記第２温度検出手段で検出した温度と前
記室温検出手段で検出した温度との差が第２の所定値よ
り大きいときに異常と判定する手段であるものとするこ
ともできる。こうすれば、より確実に異常を検出するこ
とができる。In the heat medium supply abnormality detecting device according to the present invention, the temperature of any one of the inside, the outer wall, and the vicinity of the heat medium pipe downstream of the heat exchanger provided downstream of the first temperature detecting means. The supply abnormality determination means is configured to detect the temperature detected by the first temperature detection means and the room temperature detection means when the supply of the heat medium is stopped. An abnormality is determined when the difference between the detected temperature is larger than a first predetermined value and the difference between the temperature detected by the second temperature detecting means and the temperature detected by the room temperature detecting means is larger than a second predetermined value. It can also be a means to perform. In this case, the abnormality can be detected more reliably.
【００１０】この本発明の熱媒供給異常検出装置におい
て、前記熱媒の供給が停止されたとき、少なくとも所定
時間に亘って前記室内機から前記室内へ風を送る送風手
段を備えるものとすることができる。こうすれば、熱媒
の供給が停止された直後に残留する熱媒によって室温が
変化した場合における誤判定を防ぐことができる。In the heat medium supply abnormality detecting device according to the present invention, when the supply of the heat medium is stopped, there is provided a blowing means for sending air from the indoor unit to the room for at least a predetermined time. Can be. This can prevent erroneous determination when the room temperature changes due to the heat medium remaining immediately after the supply of the heat medium is stopped.
【００１１】この本発明の熱媒供給異常検出装置におい
て、前記供給異常判定手段は、前記熱媒の供給を行なっ
ている状態の際に、前記第１温度検出手段で検出した温
度と前記室温検出手段で検出した温度との差が所定値よ
り小さいときに異常と判定する手段であるものとするこ
ともできる。こうすれば、熱媒の供給を行なっている状
態における異常を検出することができる。In the heat medium supply abnormality detecting device according to the present invention, the supply abnormality determination means is configured to detect the temperature detected by the first temperature detection means and the room temperature detection while the heat medium is being supplied. When the difference from the temperature detected by the means is smaller than a predetermined value, the means may be determined to be abnormal. This makes it possible to detect an abnormality in a state where the heat medium is being supplied.
【００１２】この本発明の熱媒供給異常検出装置におい
て、前記熱媒は、冷媒であり、前記熱媒供給停止手段
は、前記冷媒の供給の際に該冷媒を断熱膨張させる手段
であるものとすることもできる。こうすれば、室内を冷
房するときに、冷媒の供給の際に冷媒を断熱膨張させる
熱媒供給停止手段の動作異常による供給異常を検出する
ことができる。In the heat medium supply abnormality detecting device according to the present invention, the heat medium is a refrigerant, and the heat medium supply stopping means is means for adiabatically expanding the refrigerant when the refrigerant is supplied. You can also. In this way, when cooling the room, it is possible to detect a supply abnormality due to an operation abnormality of the heat medium supply stop means for adiabatically expanding the refrigerant when supplying the refrigerant.
【００１３】[0013]
【発明の実施の形態】次に、本発明の実施の形態を実施
例を用いて説明する。図１は、本発明の一実施例である
冷媒供給異常検出装置を備える空気調和機の構成の概略
を示す構成図である。空気調和機１００は、熱交換器１
２と冷媒を断熱圧縮する圧縮機１４とを備え室外に設置
された室外機１０と、内部に室外機１０から供給された
冷媒が流れる冷媒配管２０と、冷媒配管２０を介して室
外機１０から冷媒を供給され室内に設置された複数の室
内機３０ａ，３０ｂ，３０ｃとを備え、室内機３０ａ，
３０ｂ，３０ｃを設置した室内の冷房を行なう。Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram schematically showing the configuration of an air conditioner including a refrigerant supply abnormality detection device according to one embodiment of the present invention. The air conditioner 100 includes the heat exchanger 1
2 and a compressor 14 that adiabatically compresses the refrigerant, an outdoor unit 10 installed outdoors, a refrigerant pipe 20 into which the refrigerant supplied from the outdoor unit 10 flows, and the outdoor unit 10 through the refrigerant pipe 20. A plurality of indoor units 30a, 30b, and 30c that are supplied with a refrigerant and installed indoors;
Cooling in the room where 30b and 30c are installed is performed.
【００１４】室内機３０ａは、冷媒配管２０に設けられ
冷媒の供給と供給の停止とを行なうとともに冷媒の供給
の際に冷媒を断熱膨張させる電子膨張弁３２と、電子膨
張弁３２の下流側に設けられた熱交換器３４と、室内機
３０ａの内部から室内へ風を送る送風機３６と、冷媒供
給異常検出装置４０と、冷媒供給異常検出装置４０から
の発報要求信号に基づいて異常を発報する異常発報装置
６０とを備える。尚、室内機３０ｂ，３０ｃは、図示は
しないが、室内機３０ａと同じ構成を備える。The indoor unit 30a includes an electronic expansion valve 32 provided in the refrigerant pipe 20 for supplying and stopping the refrigerant and adiabatically expanding the refrigerant when the refrigerant is supplied. The heat exchanger 34 provided, the blower 36 for sending air from inside the indoor unit 30a to the room, the refrigerant supply abnormality detection device 40, and an abnormality is generated based on a report request signal from the refrigerant supply abnormality detection device 40. And an abnormality notification device 60 for notifying the user. Although not shown, the indoor units 30b and 30c have the same configuration as the indoor unit 30a.
【００１５】冷媒供給異常検出装置４０は、電子膨張弁
３２と熱交換器３４との間に設けられ冷媒配管２０の近
傍の温度を検出する第１温度センサ４２と、熱交換器３
４の下流側に設けられ冷媒配管２０の近傍の温度を検出
する第２温度センサ４４と、室内機３０ａが設置された
室内の温度を検出する室温センサ４６と、電子膨張弁３
２，送風機３６，異常発報装置６０を制御するとともに
冷媒の供給異常を判定する判定制御装置４８とを備え
る。The refrigerant supply abnormality detecting device 40 includes a first temperature sensor 42 provided between the electronic expansion valve 32 and the heat exchanger 34 for detecting a temperature near the refrigerant pipe 20;
4, a second temperature sensor 44 for detecting the temperature in the vicinity of the refrigerant pipe 20, a room temperature sensor 46 for detecting the temperature in the room where the indoor unit 30a is installed, and the electronic expansion valve 3
2, a determination control device 48 that controls the blower 36 and the abnormality notification device 60 and determines a supply abnormality of the refrigerant.
【００１６】判定制御装置４８は、第１温度センサ４
２，第２温度センサ４４，室温センサ４６で検出された
温度が入力され、これらの温度に応じて室内機３０ａの
冷房運転制御と冷媒の供給異常の判定とを行なう。ま
ず、判定制御装置４８における運転制御処理を説明す
る。判定制御装置４８は、室温センサ４６が検出した室
温が所定の温度より高いときは、第１温度センサ４２で
検出した温度と第２温度センサ４４で検出した温度との
温度差を演算し、この温度差が所定値より大きければ電
子膨張弁３２の開度が大きくなるよう制御し、この温度
差が所定値より小さければ電子膨張弁３２の開度が小さ
くなるように制御する。即ち、判定制御装置４８は、第
１温度センサ４２で検出した温度と第２温度センサ４４
で検出した温度との温度差が所定値となるように電子制
御弁３２を制御することで、冷媒の供給量を調整し、室
温を所定の温度に下げる冷房運転を行なう。一方、室温
センサ４６が検出した室温が所定の温度より低いときに
は、判定制御装置４８は、電子膨張弁３２を全閉し冷媒
の供給を停止し室内機３０ａの動作を停止させるか、又
は、電子膨張弁３２を全閉し送風機３６のみが動作する
ように制御し送風運転を行なう。The determination control device 48 includes a first temperature sensor 4
2. The temperatures detected by the second temperature sensor 44 and the room temperature sensor 46 are input, and the cooling operation control of the indoor unit 30a and the determination of the refrigerant supply abnormality are performed according to these temperatures. First, an operation control process in the determination control device 48 will be described. When the room temperature detected by the room temperature sensor 46 is higher than a predetermined temperature, the determination control device 48 calculates a temperature difference between the temperature detected by the first temperature sensor 42 and the temperature detected by the second temperature sensor 44, If the temperature difference is larger than a predetermined value, the opening degree of the electronic expansion valve 32 is controlled to be large, and if the temperature difference is smaller than the predetermined value, the opening degree of the electronic expansion valve 32 is controlled to be small. That is, the determination control device 48 determines whether the temperature detected by the first temperature sensor 42 and the second temperature sensor 44
By controlling the electronic control valve 32 so that the temperature difference from the temperature detected in the above becomes a predetermined value, the cooling operation is performed by adjusting the supply amount of the refrigerant and lowering the room temperature to the predetermined temperature. On the other hand, when the room temperature detected by the room temperature sensor 46 is lower than the predetermined temperature, the determination control device 48 completely closes the electronic expansion valve 32 to stop the supply of the refrigerant and stop the operation of the indoor unit 30a, or The expansion valve 32 is fully closed, and only the blower 36 is controlled to operate so as to perform the blowing operation.
【００１７】次に、判定制御装置４８における冷媒供給
異常の判定処理を説明する。図２は、室内機３０ａの送
風運転時又は停止時、即ち、電子膨張弁が全閉状態であ
るときに判定制御装置４８が実行する冷媒供給異常判定
処理ルーチンを示すフロー図である。最初に、室内機が
停止しているか否かを判定し（ステップＳ１０）、停止
していれば、送風機３６を５分間作動させる（ステップ
Ｓ１２）。こうすることで、電子膨張弁３２が全閉とな
り室内機の動作を停止した直後に熱交換器３４に残留し
ている冷媒で室温が低下しても、後の処理における誤判
定を防止することができる。停止していなければ、送風
運転であるのでステップＳ１２の処理は行なわず次の処
理へ進む。Next, a process of judging a refrigerant supply abnormality in the judgment controller 48 will be described. FIG. 2 is a flowchart showing a refrigerant supply abnormality determination processing routine executed by the determination control device 48 when the indoor unit 30a performs the blowing operation or stops, that is, when the electronic expansion valve is in the fully closed state. First, it is determined whether or not the indoor unit is stopped (step S10), and if it is stopped, the blower 36 is operated for 5 minutes (step S12). By doing so, even if the room temperature drops due to the refrigerant remaining in the heat exchanger 34 immediately after the electronic expansion valve 32 is fully closed and the operation of the indoor unit is stopped, erroneous determination in subsequent processing is prevented. Can be. If it is not stopped, the process is in the air blowing operation, and the process proceeds to the next process without performing the process in step S12.
【００１８】そして、第１温度センサ４２で検出した温
度Ｔ１，第２温度センサ４４で検出した温度Ｔ２，室温
センサ４６で検出した温度Ｔ３が入力され（ステップＳ
１４）、温度Ｔ１と温度Ｔ３との温度差ΔＴ１と、温度
Ｔ２と温度Ｔ３との温度差ΔＴ２とを演算する（ステッ
プＳ１６）。Then, the temperature T1 detected by the first temperature sensor 42, the temperature T2 detected by the second temperature sensor 44, and the temperature T3 detected by the room temperature sensor 46 are input (Step S).
14), a temperature difference ΔT1 between the temperature T1 and the temperature T3 and a temperature difference ΔT2 between the temperature T2 and the temperature T3 are calculated (Step S16).
【００１９】次に、温度差ΔＴ１が所定値Ｔａより大き
いか否かを判定する（ステップＳ１８）。ここで、所定
値Ｔａは例えば５℃程度とする。温度差ΔＴ１が所定値
Ｔａより大きいときは、次に、温度差ΔＴ２が所定値Ｔ
ａより大きいか否かを判定する（ステップＳ２０）。温
度差ΔＴ２が所定値Ｔａより大きいときには、電子膨張
弁３２が全閉しておらず電子膨張弁３２の下流側の冷媒
配管２０に冷媒が流れ込んでいるので、判定制御装置４
８は、開故障による供給異常が発生していると判定し
（ステップＳ２２）、異常発報装置６０に発報要求信号
を送出して（ステップＳ２４）処理を終了する。Next, it is determined whether the temperature difference ΔT1 is larger than a predetermined value Ta (step S18). Here, the predetermined value Ta is, for example, about 5 ° C. If the temperature difference ΔT1 is larger than the predetermined value Ta, then the temperature difference ΔT2 is
It is determined whether it is larger than a (step S20). When the temperature difference ΔT2 is larger than the predetermined value Ta, the electronic expansion valve 32 is not fully closed and the refrigerant flows into the refrigerant pipe 20 downstream of the electronic expansion valve 32.
8 judges that a supply abnormality has occurred due to an open failure (step S22), sends an alarm request signal to the abnormality alarm device 60 (step S24), and ends the process.
【００２０】一方、ステップＳ１８の処理において、温
度差ΔＴ１が所定値Ｔａより小さいときには、電子膨張
弁３２は全閉しており冷媒配管２０の電子膨張弁３２の
下流側には冷媒が流れ込んでいないので、冷媒の供給異
常は発生してないとして、処理を終了する。On the other hand, when the temperature difference ΔT1 is smaller than the predetermined value Ta in the process of step S18, the electronic expansion valve 32 is fully closed, and the refrigerant does not flow into the refrigerant pipe 20 downstream of the electronic expansion valve 32. Therefore, it is determined that no refrigerant supply abnormality has occurred, and the process ends.
【００２１】また、ステップＳ２０の処理において、温
度差ΔＴ２が所定値Ｔａより小さいときには、電子膨張
弁３２は全閉していないものの開度が小さく、冷媒の供
給異常は軽微なものとすることができる。このとき、供
給異常は発生していないとして、処理を終了する。In the process of step S20, when the temperature difference ΔT2 is smaller than the predetermined value Ta, the electronic expansion valve 32 is not fully closed but the opening degree is small, and the abnormal supply of refrigerant may be slight. it can. At this time, it is determined that no supply abnormality has occurred, and the process ends.
【００２２】以上説明したように、本実施例の冷媒供給
異常検出装置４０は、室内機３０ａの送風運転中や停止
中に冷媒の供給異常を検出することができる。この結
果、冷媒の供給異常を早期に発見することができ、冷媒
の供給異常によって生じる結露による水漏れを防止する
ことができる。また、異常をおこしている室内機の特定
を短時間に行なうこともできるため、他の室内機への冷
媒の供給不足が生じることによる冷房効果の低下を防ぐ
ことができる。As described above, the refrigerant supply abnormality detecting device 40 of the present embodiment can detect the supply abnormality of the refrigerant during the air blowing operation or the stop of the indoor unit 30a. As a result, an abnormal supply of the refrigerant can be detected at an early stage, and water leakage due to dew condensation caused by the abnormal supply of the refrigerant can be prevented. In addition, since the indoor unit having the abnormality can be specified in a short time, it is possible to prevent a decrease in the cooling effect due to a shortage of the supply of the refrigerant to other indoor units.
【００２３】尚、本実施例の冷媒供給異常検出装置４０
では、異常を検出してもその異常が電子膨張弁３２の一
時的な誤動作から生じるときもあるので、判定制御装置
４８が異常と判定した後に再度電子膨張弁３２を閉じる
ように制御することもできる。The refrigerant supply abnormality detecting device 40 according to the present embodiment
Then, even if an abnormality is detected, the abnormality may occur due to a temporary malfunction of the electronic expansion valve 32. Therefore, after the determination control device 48 determines that an abnormality has occurred, the electronic expansion valve 32 may be controlled to be closed again. it can.
【００２４】また、本実施例の冷媒供給異常検出装置４
０では、温度差ΔＴ１，ΔＴ２を所定値Ｔａより比較し
て供給異常を検出したが、温度差ΔＴ１とΔＴ２は各々
異なる所定値で比較して供給異常を検出するものとする
こともできる。Further, the refrigerant supply abnormality detecting device 4 of this embodiment
At 0, the supply difference is detected by comparing the temperature differences ΔT1 and ΔT2 from the predetermined value Ta. However, the supply difference may be detected by comparing the temperature differences ΔT1 and ΔT2 with different predetermined values.
【００２５】また、本実施例の冷媒供給異常検出装置４
０では、電子膨張弁３２の開故障の発生を検出したが、
例えば、冷媒の供給が必要なときに電子膨張弁３２が閉
じている閉故障の発生を検出することもできる。この場
合、第１の温度差と第２の温度差とを演算し、第１の温
度差と第２の温度差とが共に所定の値、例えば、５℃よ
り小さいとき、電子膨張弁３２が閉じていて冷媒が供給
されない冷媒供給異常が発生していると判定する。Further, the refrigerant supply abnormality detecting device 4 of this embodiment
At 0, the occurrence of an open failure of the electronic expansion valve 32 is detected.
For example, it is possible to detect the occurrence of a closing failure in which the electronic expansion valve 32 is closed when the supply of the refrigerant is required. In this case, the first temperature difference and the second temperature difference are calculated, and when the first temperature difference and the second temperature difference are both smaller than a predetermined value, for example, 5 ° C., the electronic expansion valve 32 is activated. It is determined that a refrigerant supply abnormality in which the refrigerant is closed and the refrigerant is not supplied has occurred.
【００２６】また、本実施例の冷媒供給異常検出装置４
０では、第１温度センサ４２と第２温度センサ４４と
は、冷媒配管２０の近傍の温度を検出するものとした
が、冷媒配管２０の内部や外壁の温度を検出するものと
することもできる。Further, the refrigerant supply abnormality detecting device 4 of this embodiment
In the case of 0, the first temperature sensor 42 and the second temperature sensor 44 detect the temperature in the vicinity of the refrigerant pipe 20, but may detect the temperature of the inside or the outer wall of the refrigerant pipe 20. .
【００２７】そして、本実施例の冷媒供給異常検出装置
４０では、第１温度センサ４２，第２温度センサ４４，
室温センサ４６の各々で検出した温度を用いて冷媒の供
給異常の検出したが、第２温度センサ４４で検出した温
度を用いずに供給異常を検出することもできる。このと
き、第１温度センサ４２で検出した温度と室温センサ４
６とで検出した温度との温度差が所定値より大きいとき
に供給異常と判定するものとすることもできる。In the refrigerant supply abnormality detecting device 40 of the present embodiment, the first temperature sensor 42, the second temperature sensor 44,
Although the supply abnormality of the refrigerant is detected using the temperature detected by each of the room temperature sensors 46, the supply abnormality may be detected without using the temperature detected by the second temperature sensor 44. At this time, the temperature detected by the first temperature sensor 42 and the room temperature sensor 4
When the temperature difference from the temperature detected in step 6 is larger than a predetermined value, it may be determined that the supply is abnormal.
【００２８】尚、本実施例の冷媒供給異常検出装置４０
を備える空気調和機１００は、室内を冷房するものとし
たが、室内を暖房するものとすることもできる。このと
き、室内機３０ａは、電子膨張弁３２の代わりに圧縮機
１４を備えたものとなり、第１温度センサで検出した温
度と室温センサ４６とで検出した温度との温度差が所定
値より大きいときに供給異常と判定する。また、空気調
和機１００は、室内の冷房と暖房とが共に可能なものと
することもできる。The refrigerant supply abnormality detecting device 40 of this embodiment
Although the air conditioner 100 provided with is configured to cool the room, it may be configured to heat the room. At this time, the indoor unit 30a includes the compressor 14 instead of the electronic expansion valve 32, and the temperature difference between the temperature detected by the first temperature sensor and the temperature detected by the room temperature sensor 46 is larger than a predetermined value. Sometimes it is determined that the supply is abnormal. In addition, the air conditioner 100 may be capable of both indoor cooling and heating.
【００２９】以上、本発明の実施の形態について実施例
を用いて説明したが、本発明はこうした実施例に何等限
定されるものではなく、本発明の要旨を逸脱しない範囲
内において、種々なる形態で実施し得ることは勿論であ
る。The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various embodiments may be made without departing from the scope of the present invention. Of course, it can be carried out.
【図１】 本発明の一実施例である冷媒供給異常検出装
置を備える空気調和機の構成の概略を示す構成図であ
る。FIG. 1 is a configuration diagram schematically illustrating the configuration of an air conditioner including a refrigerant supply abnormality detection device according to an embodiment of the present invention.
【図２】 電子膨張弁３２が全閉状態であるときに判定
制御装置４８で実行される冷媒供給異常判定処理ルーチ
ンを示すフロー図である。FIG. 2 is a flowchart showing a refrigerant supply abnormality determination processing routine executed by a determination control device 48 when the electronic expansion valve 32 is in a fully closed state.
１０ 室外機、２０ 冷媒配管、３０ａ，３０ｂ，３０
ｃ 室内機、３２ 電子膨張弁、３６ 送風機、４０
冷媒供給異常検出装置、４２ 第１温度センサ、４４
第２温度センサ、４６ 室温センサ、４８ 判定制御装
置、１００ 空気調和機。10 outdoor unit, 20 refrigerant piping, 30a, 30b, 30
c indoor unit, 32 electronic expansion valve, 36 blower, 40
Refrigerant supply abnormality detection device, 42 first temperature sensor, 44
Second temperature sensor, 46 room temperature sensor, 48 judgment control device, 100 air conditioner.
Claims (6)
調和を行なう少なくとも一つの室内機を備える空気調和
機における前記熱媒の供給異常を検出する熱媒供給異常
検出装置であって、 前記熱媒の供給と供給の停止とを行なう熱媒供給停止手
段と、 内部に前記熱媒が流れる熱媒配管の前記熱媒供給停止手
段の下流側における内部，外壁，近傍のいずれかの温度
を検出する第１温度検出手段と、 前記室内機が設置された室内の温度を検出する室温検出
手段と、 前記第１温度検出手段で検出した温度と前記室温検出手
段で検出した室内の温度とに基づいて前記熱媒の供給異
常を判定する供給異常判定手段と、 を備える熱媒供給異常検出装置。1. A heat medium supply abnormality detecting device for detecting an abnormality in supply of the heat medium in an air conditioner including at least one indoor unit that performs air conditioning using a heat medium supplied from an outdoor unit, A heating medium supply stopping means for supplying and stopping the heating medium; and a temperature of any one of an inside, an outer wall, and a vicinity of a heating medium pipe downstream of the heating medium supply stopping means of the heating medium pipe through which the heating medium flows. A first temperature detecting means for detecting the temperature of the room where the indoor unit is installed, a room temperature detecting means for detecting the temperature of the room in which the indoor unit is installed, and a temperature detected by the first temperature detecting means and a temperature of the room detected by the room temperature detecting means. A heat medium supply abnormality detection device, comprising: a supply abnormality determination unit that determines a supply abnormality of the heat medium based on the following.
給を停止している状態の際に、前記第１温度検出手段で
検出した温度と前記室温検出手段で検出した温度との差
が所定値より大きいときに異常と判定する手段である請
求項１に記載の熱媒供給異常検出装置。2. The supply abnormality judging means, when the supply of the heat medium is stopped, determines a difference between a temperature detected by the first temperature detecting means and a temperature detected by the room temperature detecting means. The heat medium supply abnormality detection device according to claim 1, wherein the heat medium supply abnormality detection device is means for determining an abnormality when the value is larger than a predetermined value.
であって、 前記第１温度検出手段の下流側に設けられた熱交換器の
下流側における前記熱媒配管の内部，外壁，近傍のいず
れかの温度を検出する第２温度検出手段を備え、 前記供給異常判定手段は、前記熱媒の供給を停止してい
る状態の際に、前記第１温度検出手段で検出した温度と
前記室温検出手段で検出した温度との差が第１の所定値
より大きくて前記第２温度検出手段で検出した温度と前
記室温検出手段で検出した温度との差が第２の所定値よ
り大きいときに異常と判定する手段である熱媒供給異常
検出装置。3. The heat medium supply abnormality detection device according to claim 1, wherein the inside of the heat medium pipe, an outer wall, and a heat exchanger provided downstream of the heat exchanger provided downstream of the first temperature detection means. A second temperature detecting unit for detecting any temperature in the vicinity, wherein the supply abnormality determining unit is configured to detect a temperature detected by the first temperature detecting unit when the supply of the heat medium is stopped. The difference between the temperature detected by the room temperature detecting means is larger than a first predetermined value, and the difference between the temperature detected by the second temperature detecting means and the temperature detected by the room temperature detecting means is larger than a second predetermined value. A heat medium supply abnormality detection device that is a means for determining an abnormality at the time.
くとも所定時間に亘って前記室内機から前記室内へ風を
送る送風手段を備える請求項１〜３のいずれかに記載の
熱媒供給異常検出装置。4. The heat medium supply according to claim 1, further comprising a blower that sends air from the indoor unit to the room for at least a predetermined time when the supply of the heat medium is stopped. Anomaly detection device.
給を行なっている状態の際に、前記第１温度検出手段で
検出した温度と前記室温検出手段で検出した温度との差
が所定値より小さいときに異常と判定する手段である請
求項１に記載の熱媒供給異常検出装置。5. The supply abnormality determination unit determines a difference between a temperature detected by the first temperature detection unit and a temperature detected by the room temperature detection unit when the heat medium is being supplied. The heat medium supply abnormality detection device according to claim 1, wherein the heat medium supply abnormality detection device is means for determining an abnormality when the value is smaller than the value.
を断熱膨張させる手段である請求項１〜５のいずれかに
記載の熱媒供給異常検出装置。6. The heat medium according to claim 1, wherein the heat medium is a refrigerant, and the heat medium supply stopping means is means for adiabatically expanding the refrigerant when the refrigerant is supplied. Medium supply abnormality detection device.
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|---|---|---|---|
| JP2000260291A JP2002071188A (en) | 2000-08-30 | 2000-08-30 | Abnormal heating medium supply detection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000260291A JP2002071188A (en) | 2000-08-30 | 2000-08-30 | Abnormal heating medium supply detection apparatus |
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|---|---|
| JP2002071188A true JP2002071188A (en) | 2002-03-08 |
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