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
solenoid valve
compressor
temperature
means
sensor
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Withdrawn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
Original Assignee
Mitsubishi Heavy Ind Ltd
三菱重工業株式会社
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 Ind Ltd, 三菱重工業株式会社 filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP2305896A priority Critical patent/JPH09196524A/en
Publication of JPH09196524A publication Critical patent/JPH09196524A/en
Application status is Withdrawn legal-status Critical

Links

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.
COPYRIGHT: (C)1997,JPO

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。 The present invention relates to relates to a suitable failure diagnosis apparatus in a refrigeration system for a container.

【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。 Schematic of the Related Art This type refrigeration system is shown in FIG. 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。 The air flow path 9 that air inside formed in the container C is circulated evaporator 4 for fan 5 and air cooling for the air circulation is provided.

【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。 [0003] When operating the refrigeration system, gas refrigerant discharged from the compressor 1 enters the condenser 2 is condensed and liquefied here. 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。 The liquid refrigerant enters the expansion means 3 consisting of an electronic expansion valve or the like, the refrigerant adiabatic expansion to gas-liquid two-phase by being squeezed here. 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。 The refrigerant after vaporized by cooling the air inside blown by fan 5 in the process of flowing through the evaporator 4 and returns to the compressor 1.

【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 [0004] When the electromagnetic valve 8 is interposed in the liquid injection circuit 6 and open at the increase or the like of the load, the condenser 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 Electromagnetic valve 8 part of the condensed liquid refrigerant is disposed in the liquid injection circuit 6 and this in and capillary tube 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。 The is injected into the compressor 1 to prevent the temperature rise of the compressor 1 via.

【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。 [SUMMARY OF THE INVENTION The conventional refrigeration apparatus has to inspect the presence or absence of abnormality in the operational-up inspection of the container, there is a problem that can be assessed for the presence or absence of a 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 SUMMARY OF THE INVENTION The present invention was invented to solve the above problems, and has as its gist the compressor, condenser, expansion means, connected to the evaporator in this order some of the condensed liquid refrigerant in the condenser in the refrigerant circuit comprising Te provided a liquid injection circuit for introducing into the compressor, the refrigerating device formed by providing a solenoid valve in the injection circuit, the discharge gas of the compressor the solenoid valve driving a refrigerating apparatus is opened by the diagnostic command provided with a sensor for detecting the temperature, the operation command means for said solenoid valve after a predetermined time of the diagnosis instructing the closed, detected by the sensor after the predetermined time calculating a storage unit, the temperature difference between the temperature stored in the temperature and the storage means in which the sensor detects when after engaging setting time of the solenoid valve has elapsed for storing temperature 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。 Temperature difference calculation means that, normally when the calculated temperature difference is a predetermined value or more, a failure of the refrigeration system when more than a predetermined value, characterized in that a diagnostic device comprising a determination means that an abnormality 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。 [0007] Thus, the diagnostic command is output, the operation command means to operate the refrigeration system a solenoid valve is opened, the electromagnetic valve is closed after the predetermined time. 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。 Discharge gas temperature of the compressor detected by the sensor after the predetermined time is stored in the storage means, the temperature of the temperature stored in the detected temperature and the storage means of the sensor when after engaging the set time of the solenoid valve has elapsed the difference is calculated by the temperature difference calculation means. 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。 Determination means normal when the temperature difference calculated is equal to or greater than a predetermined value, when more than a predetermined value is judged to be abnormal.

【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。 [0008] When the determination means determines an abnormality may be provided with a display means for displaying it.

【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 Embodiment of the embodiment of the present invention in FIG. 1 and FIG. 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。 Shown in FIG. 1 is a system diagram, FIG. 2 is a control flowchart. 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 As shown in FIG. 1, the discharge pipe of the compressor 1 is sensor 11 for detecting the discharge gas temperature is attached, the sensor
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。 Detection temperature of 11 are inputted to the temperature difference calculating unit 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 [0010] Diagnostic command from PTI command switch 12 is inputted to the operation command unit 22, operation command means 22 electromagnetic valve 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。 Open and then it is output to, and starts operation of the refrigeration system by starting it is output to the compressor 1.
そして、タイマー23に設定された所定時間T 1 、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。 Then, the predetermined time T 1 set in the timer 23, i.e., this operating state is the same is output to the solenoid valve 8 again when the elapsed time required to stabilize closed.

【0011】上記所定時間T 1が経過したときのセンサ11 [0011] sensor 11 when the predetermined time T 1 is passed
の検出温度は記憶手段24に記憶される。 Detection temperature is stored in the storage unit 24. 電磁弁8の閉後、タイマー25に設定された設定時間T 2 、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。 After engaging solenoid valve 8, a timer 25 which is set to a set time T 2, i.e., when the operating condition has elapsed the time required to stabilize the temperature difference calculating means 21 detects the temperature and the storage means of the sensor 11 24 calculating the temperature difference between the temperature stored in the.

【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。 [0012] Temperature difference calculated is inputted to the determining means 26, determination means 26 is normal, when less than a predetermined value when the temperature difference is above a predetermined value input from the data storage unit 27 determines that the abnormality. そして、異常と判定したとき、表示手段13 Then, when it is determined that abnormality, display means 13
に出力してそれを表示させる。 And outputs it to the display it.

【0013】なお、上記所定値は予め高圧冷媒の圧力、 [0013] The predetermined value is the pressure of the pre-pressure refrigerant,
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。 Evaporator 4 refrigerant temperature at the outlet, are stored sought in the data storage unit 27 by the correlation of the air temperature or the like blown out from the evaporator 4.

【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T 1 [0014] Thus, if the liquid injection circuit 6 is normal, the predetermined time of the compressor 1 and the solenoid valve 8 is opened T 1
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 When operating, the condenser portion of the liquid injection circuit 6 of the condensed liquid refrigerant in 2, the electromagnetic valve 8, the capillary tube 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。 Discharge gas temperature of the compressor 1 is lowered by being injected into the compressor 1 through the.

【0015】その後、電磁弁8を閉として所定時間T 2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。 [0015] Thereafter, when the electromagnetic valve 8 is operated a predetermined time T 2 is closed, the discharge gas temperature increases because the liquid refrigerant is not injected into the compressor 1. 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。 Therefore, the temperature difference between discharge gas temperature and the electromagnetic valve 8 when the electromagnetic valve 8 opens and the discharge gas temperature when formed into a closed increases.

【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。 [0016] However, if there is an abnormality in the liquid injection circuit 6, or not even the liquid refrigerant injection solenoid valve 8 is opened, or a quantity injected is too small, liquid refrigerant is injected also closes the electromagnetic valve 8 because or the temperature difference between that in the discharge gas temperature and closed at the time of opening of the solenoid valve 8 is reduced.

【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。 [0017] Thus, the liquid injection circuit 6 by comparing the temperature difference with a predetermined value stored in the data storage means 27 can determine whether normal or not. 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。 Also can check whether the erroneous connection of the refrigerant pipes for the compressor 1 along with this.

【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 refrigeration apparatus of the present invention exhibits the diagnosis command is output, automatically diagnostic device makes it possible to diagnose the presence or absence of a failure of the liquid injection circuit.

【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。 [0019] When the determination means determines an abnormality, by providing a display means for displaying it, as it can easily correct the failure of the liquid injection circuit, in advance of failure of the compressor based on the failure of the liquid injection circuit It can be prevented.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施形態を示す系統図である。 1 is a system diagram illustrating 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。 2 is a control flowchart of the embodiment.

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

【符号の説明】 DESCRIPTION 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 expansion means 4 evaporator 6 liquid injection circuit 8 solenoid valve

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【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 1. A compressor, a condenser, expansion means, the liquid injection circuit for introducing a part of the liquid refrigerant condensed evaporator above the condenser in the refrigerant circuit formed by connecting in this order to the compressor provided the refrigeration apparatus comprising providing an electromagnetic valve in the injection circuit, the diagnostic command provided with a sensor for detecting the discharge gas temperature of the compressor to operate the refrigeration system of the solenoid valve is opened, the predetermined time of the diagnosis instructing and the operation command means to close the solenoid valve after a storage means for storing the detected temperatures by the sensor after the predetermined time, and the temperature which the sensor when after engaging the set time has elapsed is detected in the solenoid valve It is determined and the temperature difference calculating means for calculating a temperature difference, normally when the calculated temperature difference is more than the predetermined value, when the predetermined value or less abnormal between said storage means stored temperature 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。 Failure diagnosis apparatus of a refrigeration apparatus, characterized in that a diagnostic device comprising a determination unit.
  2. 【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 2. A method according to claim 1, characterized in that a display means for displaying it when it is determined that the determination means abnormal
    記載の冷凍装置の故障診断装置。 Failure diagnosis apparatus of 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 (8)

* 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
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
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
US9494158B2 (en) 2007-10-08 2016-11-15 Emerson Climate Technologies, Inc. Variable speed compressor protection system and method
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

Cited By (13)

* 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
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
US9057549B2 (en) 2007-10-08 2015-06-16 Emerson Climate Technologies, Inc. System and method for monitoring compressor floodback
US9476625B2 (en) 2007-10-08 2016-10-25 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
US9494158B2 (en) 2007-10-08 2016-11-15 Emerson Climate Technologies, Inc. Variable speed compressor protection system and method
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

Similar Documents

Publication Publication Date Title
JP2516601B2 (en) Diagnostic apparatus for finding a failed detector in the cooling system
US4381549A (en) Automatic fault diagnostic apparatus for a heat pump air conditioning system
JP4503646B2 (en) Air conditioning apparatus
US5983657A (en) Air conditioning system
US5186014A (en) Low refrigerant charge detection system for a heat pump
US5457965A (en) Low refrigerant charge detection system
CN1181303C (en) Refrigerator
US5150584A (en) Method and apparatus for detecting low refrigerant charge
AU2001275502B2 (en) Refrigerant monitoring apparatus and method
US7146819B2 (en) Method of monitoring refrigerant level
US5224354A (en) Control system for refrigerating apparatus
KR950007283B1 (en) Diagnostic system for detecting faulty sensors in liquid chiller air conditioning system
US6017192A (en) System and method for controlling screw compressors
US5241833A (en) Air conditioning apparatus
KR900002319B1 (en) Method and control system for verifying sensor operation in a refrigeration system
US5044168A (en) Apparatus and method for low refrigerant detection
US5910159A (en) Refrigerating cycle apparatus
US4549403A (en) Method and control system for protecting an evaporator in a refrigeration system against freezeups
US6016661A (en) Refrigerant recovery system
EP1022552B1 (en) Test for the automated detection of leaks between high and low pressure sides of a refrigeration system
US20050126190A1 (en) Loss of refrigerant charge and expansion valve malfunction detection
JP2013210181A (en) Refrigeration unit, and diagnostic method therefor
US20050126191A1 (en) Diagnosing a loss of refrigerant charge in a refrigerant system
CN1358978A (en) refrigerator
KR20050028391A (en) A refrigerants leakage sensing system and method

Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20030401