JPH09196524A - Trouble diagnostic device of refrigerating equipment - Google Patents

Trouble diagnostic device of refrigerating equipment

Info

Publication number
JPH09196524A
JPH09196524A JP2305896A JP2305896A JPH09196524A JP H09196524 A JPH09196524 A JP H09196524A JP 2305896 A JP2305896 A JP 2305896A JP 2305896 A JP2305896 A JP 2305896A JP H09196524 A JPH09196524 A JP H09196524A
Authority
JP
Japan
Prior art keywords
temperature
compressor
solenoid valve
sensor
injection circuit
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.)
Withdrawn
Application number
JP2305896A
Other languages
Japanese (ja)
Inventor
Yoshimi Shimodaira
良美 下平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP2305896A priority Critical patent/JPH09196524A/en
Publication of JPH09196524A publication Critical patent/JPH09196524A/en
Withdrawn legal-status Critical Current

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  • Air Conditioning Control Device (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

PROBLEM TO BE SOLVED: To diagnose the presence of troubles in a liquid injection circuit, and a solenoid valve, a capillary tube, etc., mounted on the liquid injection circuit of a refrigerating equipment where a compressor, a condenser and an evaporator are connected together in this order to form a refrigerant circuit, and the refrigerant circuit includes the liquid injection circuit which is equipped with a solenoid valve and through which a portion of liquid refrigerant condensed at the condenser is led to the compressor. SOLUTION: When an diagnostic instruction is output from a PTI instruction switch, an operating instruction device 22 of an diagnostic device 20 starts a compressor 1 to begin the operation of a refrigerating machine at the same time a solenoid valve 8 is opened. After a specified period of time T1 set in a timer 23 elapses, the solenoid valve 8 is closed. On the other hand, after the specified period of time T1 elapses, a memory 24 stores the temperature of delivery gas of the compressor 1 detected by a sensor 11. A differential temperature calculating device 21 calculates a differential temperature between the temperature detected by the sensor 11 when a specified period of time T2 passes after the solenoid valve 8 is closed and the temperature stored in the memory 24. A judging device 26 compares the differential temperature calculated with a specified value input from a data memory 27, and judges it normal when it is the specified value or larger and judges it abnormal when it is not exceeding the specified value.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明はコンテナ用の冷凍装
置に好適な故障診断装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure diagnosis device suitable for a refrigeration system for containers.

【０００２】[0002]

【従来の技術】この種冷凍装置の系統図が図３に示され
ている。コンテナＣ内に形成された庫内空気が循環する
空気流路９には空気循環用のフアン５及び空気冷却用の
蒸発器４が配設されている。2. Description of the Related Art A system diagram of this type of refrigerating apparatus is shown in FIG. An air circulation fan 5 for air circulation and an evaporator 4 for air cooling are arranged in an air flow passage 9 formed in the container C in which air inside the container circulates.

【０００３】冷凍装置を運転すると、圧縮機１から吐出
されたガス冷媒は凝縮器２に入り、ここで凝縮液化す
る。この液冷媒は電子膨張弁等からなる膨張手段３に入
り、ここで絞られることにより断熱膨張して気液二相の
冷媒となる。この冷媒は蒸発器４を流過する過程でフア
ン５により送風される庫内空気を冷却することによって
蒸発気化した後、圧縮機１に戻る。When the refrigeration system is operated, the gas refrigerant discharged from the compressor 1 enters the condenser 2 where it is condensed and liquefied. This liquid refrigerant enters the expansion means 3 composed of an electronic expansion valve and the like, and is throttled here to adiabatically expand to become a gas-liquid two-phase refrigerant. The refrigerant returns to the compressor 1 after being evaporated and vaporized by cooling the in-compartment air blown by the fan 5 while passing through the evaporator 4.

【０００４】負荷の増大時等において液インジェクショ
ン回路６に介装された電磁弁８を開とすると、凝縮器２
で凝縮した液冷媒の一部が液インジェクション回路６及
びこれに介装された電磁弁８及びキャピラリチューブ７
を経て圧縮機１に噴射されて圧縮機１の温度上昇を防止
する。When the solenoid valve 8 interposed in the liquid injection circuit 6 is opened when the load increases, the condenser 2
A part of the liquid refrigerant condensed in 1. is injected into the liquid injection circuit 6, and the solenoid valve 8 and the capillary tube 7 interposed therein.
And is injected into the compressor 1 to prevent the temperature of the compressor 1 from rising.

【０００５】[0005]

【発明が解決しようとする課題】上記従来の冷凍装置は
コンテナの運航前点検において異常の有無を点検してい
るが、液インジェクション回路６の故障の有無を診断す
ることができないという問題があった。The above-mentioned conventional refrigeration system checks the presence / absence of abnormality in the pre-operation inspection of the container, but has a problem that it cannot diagnose the presence / absence of failure of the liquid injection circuit 6. .

【０００６】[0006]

【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、その要旨とすると
ころは、圧縮機、凝縮器、膨張手段、蒸発器をこの順に
接続してなる冷媒回路中に上記凝縮器で凝縮した液冷媒
の一部を上記圧縮機に導入する液インジェクション回路
を設け、このインジェクション回路に電磁弁を設けてな
る冷凍装置において、上記圧縮機の吐出ガス温度を検出
するセンサを設けるとともに診断指令により上記電磁弁
を開として冷凍装置を運転し、上記診断指令の所定時間
後に上記電磁弁を閉とする運転指令手段と、上記所定時
間後に上記センサで検出された温度を記憶する記憶手段
と、上記電磁弁の閉後設定時間が経過したとき上記セン
サが検出した温度と上記記憶手段に記憶された温度との
間の温度差を算出する温度差算出手段と、算出された温
度差が所定値以上のときは正常、所定値以下のときは異
常と判定する判定手段とからなる診断装置を設けたこと
を特徴とする冷凍装置の故障診断装置にある。The present invention has been invented to solve the above-mentioned problems, and its gist is to connect a compressor, a condenser, an expansion means and an evaporator in this order. In a refrigerating device provided with a liquid injection circuit for introducing a part of the liquid refrigerant condensed in the condenser into the compressor in the refrigerant circuit formed by, and a solenoid valve provided in this injection circuit, the discharge gas of the compressor A temperature detecting sensor is provided and a diagnostic command is issued to open the solenoid valve to operate the refrigeration system. After a predetermined time from the diagnostic command, operation command means to close the solenoid valve and the sensor to detect the predetermined time are detected. And a temperature difference between the temperature detected by the sensor when the set time elapses after the solenoid valve is closed and the temperature stored in the storage unit. A failure of the refrigerating apparatus, which is provided with a diagnostic device including a temperature difference calculating unit that determines whether the calculated temperature difference is a predetermined value or more and a determination unit that determines an abnormality when the calculated temperature difference is a predetermined value or less. In the diagnostic device.

【０００７】しかして、診断指令が出力されると、運転
指令手段は電磁弁を開として冷凍装置を運転し、その所
定時間後に電磁弁を閉とする。上記所定時間後にセンサ
で検出された圧縮機の吐出ガス温度が記憶手段に記憶さ
れ、電磁弁の閉後設定時間が経過したときのセンサの検
出温度と上記記憶手段に記憶された温度との温度差が温
度差算出手段で算出される。判定手段は算出された温度
差が所定値以上のときは正常、所定値以下のときは異常
と判定する。When the diagnosis command is output, the operation command means opens the electromagnetic valve to operate the refrigerating device, and closes the electromagnetic valve after a predetermined time. The discharge gas temperature of the compressor detected by the sensor after the predetermined time is stored in the storage means, and the temperature detected by the sensor when the set time has elapsed after the electromagnetic valve is closed and the temperature stored in the storage means. The difference is calculated by the temperature difference calculating means. The determination means determines that the calculated temperature difference is normal when the temperature difference is equal to or larger than a predetermined value, and abnormal when the calculated temperature difference is equal to or smaller than the predetermined value.

【０００８】上記判定手段が異常と判定した時、それを
表示する表示手段を設けることができる。Display means may be provided for displaying the abnormality when the above-mentioned determination means determines that it is abnormal.

【０００９】[0009]

【発明の実施の形態】本発明の実施形態が図１及び図２
に示され、図１は系統図、図２は制御フローチャートで
ある。図１に示すように、圧縮機１の吐出管には吐出ガ
ス温度を検出するセンサ11が取り付けられ、このセンサ
11の検出温度は診断装置20の温度差算出手段21に入力さ
れるようになっている。1 and 2 show an embodiment of the present invention.
FIG. 1 is a system diagram, and FIG. 2 is a control flowchart. As shown in FIG. 1, a sensor 11 for detecting the discharge gas temperature is attached to the discharge pipe of the compressor 1.
The detected temperature of 11 is input to the temperature difference calculating means 21 of the diagnostic device 20.

【００１０】PTI 指令スイッチ12からの診断指令が運転
指令手段22に入力されると、運転指令手段22は電磁弁８
に出力してこれを開とし、かつ、圧縮機１に出力してこ
れを起動することによって冷凍装置の運転を開始する。
そして、タイマー23に設定された所定時間T1、即ち、こ
の運転状態が安定するのに要する時間が経過したとき再
び電磁弁８に出力してこれを閉とする。When the diagnostic command from the PTI command switch 12 is input to the operation command means 22, the operation command means 22 causes the solenoid valve 8 to operate.
To start the operation of the refrigeration system by outputting it to the compressor 1 and opening it.
Then, when the predetermined time T 1 set in the timer 23, that is, the time required for the operating state to stabilize, has passed, it is output again to the solenoid valve 8 to close it.

【００１１】上記所定時間T1が経過したときのセンサ11
の検出温度は記憶手段24に記憶される。電磁弁８の閉
後、タイマー25に設定された設定時間T2、即ち、この運
転状態が安定するのに要する時間が経過したとき、温度
差算出手段21はセンサ11の検出温度と記憶手段24に記憶
されている温度との温度差を算出する。The sensor 11 when the predetermined time T 1 has elapsed
The detected temperature is stored in the storage means 24. After the solenoid valve 8 is closed, when the set time T 2 set in the timer 25, that is, the time required for the operating state to stabilize, the temperature difference calculation means 21 detects the temperature detected by the sensor 11 and the storage means 24. The temperature difference from the temperature stored in is calculated.

【００１２】算出された温度差は判定手段26に入力さ
れ、判定手段26は温度差がデータ記憶手段27から入力さ
れた所定値以上のときは正常、所定値以下のときは異常
と判定する。そして、異常と判定したとき、表示手段13
に出力してそれを表示させる。The calculated temperature difference is input to the determination means 26, and the determination means 26 determines that the temperature difference is normal when the temperature difference is equal to or more than the predetermined value input from the data storage means 27 and abnormal when the temperature difference is less than the predetermined value. When it is determined to be abnormal, the display means 13
And output it to.

【００１３】なお、上記所定値は予め高圧冷媒の圧力、
蒸発器４出口の冷媒温度、蒸発器４から吹き出される空
気温度等の相関により求められてデータ記憶手段27に記
憶されている。The predetermined value is the pressure of the high pressure refrigerant,
It is obtained from the correlation between the refrigerant temperature at the outlet of the evaporator 4 and the temperature of the air blown out from the evaporator 4, and is stored in the data storage means 27.

【００１４】しかして、液インジェクション回路６が正
常であれば、電磁弁８を開として圧縮機１を所定時間T1
運転すると、凝縮器２で凝縮した液冷媒の一部が液イン
ジェクション回路６、電磁弁８、キャピラリチューブ７
を通って圧縮機１に噴射されることにより圧縮機１の吐
出ガス温度が低下する。If the liquid injection circuit 6 is normal, the solenoid valve 8 is opened and the compressor 1 is operated for a predetermined time T 1
When operated, a part of the liquid refrigerant condensed in the condenser 2 is partially injected into the liquid injection circuit 6, the solenoid valve 8 and the capillary tube 7.
The temperature of the gas discharged from the compressor 1 is lowered by being injected into the compressor 1 through the gas.

【００１５】その後、電磁弁８を閉として所定時間T2運
転すると、液冷媒が圧縮機１に噴射されないためその吐
出ガス温度が上昇する。従って、電磁弁８を開としたと
きの吐出ガス温度と電磁弁８を閉としたときの吐出ガス
温度との間の温度差は大きくなる。After that, when the electromagnetic valve 8 is closed and T 2 is operated for a predetermined time, the liquid refrigerant is not injected into the compressor 1 and the temperature of the discharged gas rises. Therefore, the temperature difference between the discharge gas temperature when the solenoid valve 8 is opened and the discharge gas temperature when the solenoid valve 8 is closed becomes large.

【００１６】しかるに、液インジェクション回路６に異
常があれば、電磁弁８を開としても液冷媒が噴射されな
かったり、噴射量が過少であったり、電磁弁８を閉じて
も液冷媒が噴射されたりするので、電磁弁８の開時にお
ける吐出ガス温度と閉時におけるそれとの間の温度差が
小さくなる。However, if the liquid injection circuit 6 is abnormal, the liquid refrigerant is not injected even if the electromagnetic valve 8 is opened, the injection amount is too small, or the liquid refrigerant is injected even if the electromagnetic valve 8 is closed. Therefore, the temperature difference between the discharge gas temperature when the solenoid valve 8 is open and the discharge gas temperature when the solenoid valve 8 is closed becomes small.

【００１７】従って、この温度差をデータ記憶手段27に
記憶された所定値と対比することによって液インジェク
ション回路６が正常か否かを判定できる。また、これに
併せて圧縮機１に対する冷媒配管の誤接続の有無もチェ
ックできる。Therefore, by comparing this temperature difference with the predetermined value stored in the data storage means 27, it is possible to determine whether the liquid injection circuit 6 is normal or not. In addition to this, it is possible to check whether the refrigerant pipe is erroneously connected to the compressor 1.

【００１８】[0018]

【発明の効果】本発明の冷凍装置においては、診断指令
が出力されると、自動的に診断装置により液インジェク
ション回路の故障の有無を診断することができる。In the refrigerating apparatus of the present invention, when a diagnostic command is output, it is possible to automatically diagnose the presence or absence of a failure in the liquid injection circuit by the diagnostic apparatus.

【００１９】判定手段が異常と判定した時、それを表示
する表示手段を設ければ、液インジェクション回路の故
障を容易に是正しうるので、液インジェクション回路の
故障に基づく圧縮機の故障を未然に防止できる。When the determination means determines that the abnormality is present, if a display means for displaying the abnormality is provided, the failure of the liquid injection circuit can be easily corrected, so that the failure of the compressor due to the failure of the liquid injection circuit can be prevented. It can be prevented.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施形態を示す系統図である。FIG. 1 is a system diagram showing an embodiment of the present invention.

【図２】上記実施形態の制御フローチャートである。FIG. 2 is a control flowchart of the embodiment.

【図３】従来の冷凍装置の系統図である。FIG. 3 is a system diagram of a conventional refrigeration system.

【符号の説明】[Explanation of symbols]

１ 圧縮機 ２ 凝縮器 ３ 膨張手段 ４ 蒸発器 ６ 液インジェクション回路 ８ 電磁弁 1 Compressor 2 Condenser 3 Expanding means 4 Evaporator 6 Liquid injection circuit 8 Solenoid valve

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 圧縮機、凝縮器、膨張手段、蒸発器をこ
の順に接続してなる冷媒回路中に上記凝縮器で凝縮した
液冷媒の一部を上記圧縮機に導入する液インジェクショ
ン回路を設け、このインジェクション回路に電磁弁を設
けてなる冷凍装置において、 上記圧縮機の吐出ガス温度を検出するセンサを設けると
ともに診断指令により上記電磁弁を開として冷凍装置を
運転し、上記診断指令の所定時間後に上記電磁弁を閉と
する運転指令手段と、上記所定時間後に上記センサで検
出された温度を記憶する記憶手段と、上記電磁弁の閉後
設定時間が経過したとき上記センサが検出した温度と上
記記憶手段に記憶された温度との間の温度差を算出する
温度差算出手段と、算出された温度差が所定値以上のと
きは正常、所定値以下のときは異常と判定する判定手段
とからなる診断装置を設けたことを特徴とする冷凍装置
の故障診断装置。1. A liquid injection circuit for introducing a part of the liquid refrigerant condensed in the condenser into the compressor in a refrigerant circuit formed by connecting a compressor, a condenser, an expansion means and an evaporator in this order. , In a refrigeration system provided with an electromagnetic valve in this injection circuit, a sensor for detecting the discharge gas temperature of the compressor is provided and the refrigeration system is operated by opening the electromagnetic valve according to a diagnostic command, and the predetermined time of the diagnostic command is reached. The operation command means for closing the solenoid valve later, the storage means for storing the temperature detected by the sensor after the predetermined time, and the temperature detected by the sensor when the set time after closing the solenoid valve has elapsed. A temperature difference calculating means for calculating a temperature difference between the temperature stored in the storage means, and a normal temperature when the calculated temperature difference is a predetermined value or more, and an abnormality when the calculated temperature difference is a predetermined value or less. Failure diagnosis apparatus of a refrigeration apparatus, characterized in that a diagnostic device comprising a determination unit. 【請求項２】 上記判定手段が異常と判定したときそれ
を表示する表示手段を設けたことを特徴とする請求項１
記載の冷凍装置の故障診断装置。2. A display means for displaying the abnormality when the determination means determines that the abnormality is present.
A failure diagnosis device for the refrigeration system described.
JP2305896A 1996-01-16 1996-01-16 Trouble diagnostic device of refrigerating equipment Withdrawn JPH09196524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2305896A JPH09196524A (en) 1996-01-16 1996-01-16 Trouble diagnostic device of refrigerating equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2305896A JPH09196524A (en) 1996-01-16 1996-01-16 Trouble diagnostic device of refrigerating equipment

Publications (1)

Publication Number Publication Date
JPH09196524A true JPH09196524A (en) 1997-07-31

Family

ID=12099839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2305896A Withdrawn JPH09196524A (en) 1996-01-16 1996-01-16 Trouble diagnostic device of refrigerating equipment

Country Status (1)

Country Link
JP (1) JPH09196524A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1022525A1 (en) * 1999-01-19 2000-07-26 Carrier Corporation Pretrip routine for testing individual refrigeration system components
CN100334352C (en) * 2001-04-25 2007-08-29 爱默生气候技术公司 Diagnostic system of compressor
WO2009048576A1 (en) * 2007-10-08 2009-04-16 Emerson Climate Technologies, Inc. System and method for evaluating parameters for a refrigeration system with a variable speed compressor
US7895003B2 (en) 2007-10-05 2011-02-22 Emerson Climate Technologies, Inc. Vibration protection in a variable speed compressor
US8950206B2 (en) 2007-10-05 2015-02-10 Emerson Climate Technologies, Inc. Compressor assembly having electronics cooling system and method
US9057549B2 (en) 2007-10-08 2015-06-16 Emerson Climate Technologies, Inc. System and method for monitoring compressor floodback
US9494158B2 (en) 2007-10-08 2016-11-15 Emerson Climate Technologies, Inc. Variable speed compressor protection system and method
US9494354B2 (en) 2007-10-08 2016-11-15 Emerson Climate Technologies, Inc. System and method for calculating parameters for a refrigeration system with a variable speed compressor
US9541907B2 (en) 2007-10-08 2017-01-10 Emerson Climate Technologies, Inc. System and method for calibrating parameters for a refrigeration system with a variable speed compressor
US11206743B2 (en) 2019-07-25 2021-12-21 Emerson Climate Technolgies, Inc. Electronics enclosure with heat-transfer element
CN114963618A (en) * 2022-05-24 2022-08-30 珠海格力电器股份有限公司 Method and apparatus for detecting failure of liquid ejection solenoid valve, electronic device, and medium

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1022525A1 (en) * 1999-01-19 2000-07-26 Carrier Corporation Pretrip routine for testing individual refrigeration system components
CN100334352C (en) * 2001-04-25 2007-08-29 爱默生气候技术公司 Diagnostic system of compressor
US9683563B2 (en) 2007-10-05 2017-06-20 Emerson Climate Technologies, Inc. Vibration protection in a variable speed compressor
US7895003B2 (en) 2007-10-05 2011-02-22 Emerson Climate Technologies, Inc. Vibration protection in a variable speed compressor
US8849613B2 (en) 2007-10-05 2014-09-30 Emerson Climate Technologies, Inc. Vibration protection in a variable speed compressor
US8950206B2 (en) 2007-10-05 2015-02-10 Emerson Climate Technologies, Inc. Compressor assembly having electronics cooling system and method
US9021823B2 (en) 2007-10-05 2015-05-05 Emerson Climate Technologies, Inc. Compressor assembly having electronics cooling system and method
US9494158B2 (en) 2007-10-08 2016-11-15 Emerson Climate Technologies, Inc. Variable speed compressor protection system and method
US9476625B2 (en) 2007-10-08 2016-10-25 Emerson Climate Technologies, Inc. System and method for monitoring compressor floodback
US9057549B2 (en) 2007-10-08 2015-06-16 Emerson Climate Technologies, Inc. System and method for monitoring compressor floodback
US9494354B2 (en) 2007-10-08 2016-11-15 Emerson Climate Technologies, Inc. System and method for calculating parameters for a refrigeration system with a variable speed compressor
US9541907B2 (en) 2007-10-08 2017-01-10 Emerson Climate Technologies, Inc. System and method for calibrating parameters for a refrigeration system with a variable speed compressor
WO2009048576A1 (en) * 2007-10-08 2009-04-16 Emerson Climate Technologies, Inc. System and method for evaluating parameters for a refrigeration system with a variable speed compressor
US10077774B2 (en) 2007-10-08 2018-09-18 Emerson Climate Technologies, Inc. Variable speed compressor protection system and method
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