JPS6117877A - Alarm device for over-encapsulation of refrigerant - Google Patents
Alarm device for over-encapsulation of refrigerantInfo
- Publication number
- JPS6117877A JPS6117877A JP13946484A JP13946484A JPS6117877A JP S6117877 A JPS6117877 A JP S6117877A JP 13946484 A JP13946484 A JP 13946484A JP 13946484 A JP13946484 A JP 13946484A JP S6117877 A JPS6117877 A JP S6117877A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- circuit
- electromagnetic clutch
- alarm
- liquid
- 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
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は自動車用冷房装置ｉｅ始めとして、各種冷房装
置に供して好適な冷媒過封入警報装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a refrigerant overfill warning device suitable for use in various types of cooling devices, including automobile cooling devices.
従来の技術
自動車用冷房装置は完成車両に後組付けされる関係上、
冷房装置を構成する各種機能部品を車両に搭載した後に
機関ｔアイドリング運転した状態で冷凍系に冷媒を封入
するようにしている。この冷媒封入時点では冷媒が過封
入であるか否かを判定することは難かしく、専ら作業者
がリキッドタンクあるいは冷媒通路に配設したサイトグ
ラスで冷媒の状Ｂを見ながら勘によって封入しているの
が現状でおる。Conventional technology Automotive cooling systems are assembled into finished vehicles afterward, so
After the various functional parts constituting the cooling system are mounted on the vehicle, the refrigerant system is filled with refrigerant while the engine is idling. At the time of charging the refrigerant, it is difficult to judge whether or not the refrigerant is overfilled, so the operator must fill the refrigerant based on intuition while observing the refrigerant condition B using a sight glass installed in the liquid tank or refrigerant passage. The current situation is that there is.
従って、冷媒の過封入状態は実際に車両を走行して冷房
装置を所要時間作動して発見される場合が多いのである
が、一般のドライバーでは冷媒過封入全知る中立ては全
くない。このため、冷媒が過封入されていると、冷凍サ
イクルで液相冷媒がリキッドタンクから溢れ出てコンデ
ンサ内に溜まってしまい、コンデンサの正常な放熱作用
が阻害されてここで冷媒の温度があまシ低下せず、サイ
クル全体の冷凍能力が小さくなって冷房の利きが低下し
てしまうのみならず、コンプレッサにリキッドバックし
てコンプレッサを破損してしまう不具合があった。Therefore, although refrigerant overfilling is often discovered by actually driving the vehicle and operating the cooling system for a required period of time, the average driver has no way of knowing about refrigerant overfilling. Therefore, if the refrigerant is overfilled, the liquid phase refrigerant will overflow from the liquid tank in the refrigeration cycle and accumulate in the condenser, inhibiting the normal heat dissipation function of the condenser and causing the temperature of the refrigerant to rise. However, the refrigerating capacity of the entire cycle becomes smaller, which not only reduces the efficiency of cooling, but also causes liquid back to the compressor, causing damage to the compressor.
そこで、例えば実公昭４７−１４３（１３号公報や実公
昭４８−３４３５８号公報等に示されているように、リ
キッドタンクに液位センサを配し、リキッドタンク内の
冷媒液位が所定レベルになるとこの液位センサの検出作
用にもとづいて警告灯等の警報器、を作動するようにし
たものが提案さ６ている。Therefore, for example, as shown in Utility Model Publication No. 143 (1983) and Publication No. 34358 of 1983, a liquid level sensor is placed in the liquid tank to ensure that the refrigerant level in the liquid tank is at a predetermined level. A system has been proposed in which an alarm such as a warning light is activated based on the detection action of this liquid level sensor.
発明が解決しようとする問題点
冷媒の封入作業は前述のように機関をアイドリンク運転
状態にし、コンプレッサを駆動して冷凍サイクルヲ稼動
状態にして行うのであるが、コンプレッサはエバポレー
タの出ロ温度ヲ検出する温度センサの検出作用にもとづ
いて電磁クラッチを断、続制御する電磁クラツチ作前回
路によって駆動制御され、エバポレータの凍結防止を行
うようにしている。この電磁クラッチの断、続制御によ
ってコンプレッサの駆動、停止をｄ返し行うと、冷凍系
に冷媒が十分に封入されていない状態もしくは適正封入
状態でも、コンプレッサ駆動直後に一時的にリキッドタ
ンク内に液相冷媒が満杯となってしまう現象が生じるこ
とがあシ、このように一時的にでもリキッドタンク内の
液相冷媒が所定レベル以上の液位上件してしまうと液位
センサが冷媒過封入と判定し、該センサの検出作用によ
シ警報器が作動して作業者が誤認してしまう不具付があ
った。Problems to be Solved by the Invention The refrigerant filling operation is carried out by putting the engine in idle mode and driving the compressor to operate the refrigeration cycle, as mentioned above, but the compressor detects the outlet temperature of the evaporator. The electromagnetic clutch is controlled by an electromagnetic clutch pre-operation circuit which controls the electromagnetic clutch to be engaged or disconnected based on the detection action of the temperature sensor, thereby preventing the evaporator from freezing. If the compressor is driven and stopped by controlling the disengagement and engagement of this electromagnetic clutch, even if the refrigerant is not sufficiently filled in the refrigeration system or is properly filled, the liquid temporarily flows into the liquid tank immediately after the compressor is started. A phenomenon in which the phase refrigerant becomes full may occur, and if the liquid level of the liquid phase refrigerant in the liquid tank rises above a predetermined level even temporarily like this, the liquid level sensor will detect that the refrigerant is overfilled. It was determined that the alarm was activated due to the detection action of the sensor, causing a malfunction in which the operator misunderstood the situation.
そこで１本発明は冷凍サイクルの稼動途中でコンプレッ
サが停止後、再駆動した直後にリキッドタンク内の冷媒
液位が一時的に所定レベル以上になっても誤報を生じる
ことのない冷媒過封入警報装置を提供するものである、
問題点を解決するための手段
本発明にあっては、エバポレータの出口温度を検出する
温度センサの検出作用にもとづいてコンプレツ、すの電
磁クラッチを断、ＶＣ制御する電磁クラツチ作前回路に
、リキッドタンクの冷媒液位を検出する液位センサと該
センサの検出作用によって作動される警報器および電磁
クラツチ作前回路の閉成作動に連動してオン作動する制
御スイッチとを備えた警報回路を接続すると共に、該警
報回路に前記制御スイッチのオン作動を所定時間遅延さ
せるタイマー回路を介装しである。Therefore, the present invention is a refrigerant overfill warning device that does not generate a false alarm even if the refrigerant level in the liquid tank temporarily exceeds a predetermined level immediately after the compressor is stopped and restarted during the operation of the refrigeration cycle. In the present invention, the electromagnetic clutch of the compressor is disengaged based on the detection action of the temperature sensor that detects the outlet temperature of the evaporator, and the electromagnetic clutch controlled by VC is disengaged. The clutch pre-operation circuit includes a liquid level sensor that detects the refrigerant level in the liquid tank, an alarm that is activated by the detection action of the sensor, and a control switch that is turned on in conjunction with the closing operation of the electromagnetic clutch pre-operation circuit. A timer circuit is connected to the alarm circuit, and the alarm circuit is provided with a timer circuit for delaying the turning-on operation of the control switch for a predetermined period of time.
作用
電磁クラツチ作前回路が閉成作動すると警報回路の制御
スイッチが遅延装置によって所定時間経過後オン作動し
、コンプレッサが駆動して前記所定時間経過後にあって
もリキッドタンク内の冷媒液位が所定レベル以上の場合
には、液位センサの検出作用により警報回路を閉成して
警報器を作動する。When the electromagnetic clutch pre-operation circuit is closed and actuated, the control switch of the alarm circuit is turned on after a predetermined time has elapsed by a delay device, and the compressor is driven to maintain the refrigerant level in the liquid tank at a predetermined level even after the elapse of the predetermined time. If it is above the level, the detection action of the liquid level sensor closes the alarm circuit and activates the alarm.
実施例 以下、本発明の実施例を図面と共に詳述する。Example Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図に２いて、１はコンプレッサを示し、このコンプレッ
サ１はエバポレータ３の出口温度を検出する温度センサ
５の検出作用にもとづいてコントロールユニット６を介
して電磁クラッチ２を断。2 in the figure, 1 indicates a compressor, and this compressor 1 disconnects the electromagnetic clutch 2 via the control unit 6 based on the detection action of the temperature sensor 5 that detects the outlet temperature of the evaporator 3.
親制御する電磁クラツチ作前回路４により駆動制御され
、エバポレータ３の出口温度が所定′１ｌｊＬ以下とな
ると駆動を停止してエバポレータ３の凍結を防止するよ
うになっている。７は前記電磁クラツチ作前回路４に接
続した警報回路？示し、リキッドタンク８内の冷媒液位
が所定ノベルになるとこれを検出する液位センサ９と、
このセンサ９の検出作用によシ作動する警報器、例えば
警告灯１０と、前記電磁クラツチ作前回路４の閉成作動
に連動してオン作動する制御ヌイツチ１１を備えている
。制御スイッチ１１は本実施例では常開リレーを用いて
いる。また、この警報回路７には前記電磁クラツチ作前
回路４が閉成作動した場合に、常開リレー１１のオン作
動全所定時間遅延させるタイマー回路１２を弁装しであ
る。The drive is controlled by an electromagnetic clutch pre-operation circuit 4 which is controlled by the main controller, and when the outlet temperature of the evaporator 3 falls below a predetermined value '1ljL, the drive is stopped to prevent the evaporator 3 from freezing. 7 is an alarm circuit connected to the electromagnetic clutch pre-operation circuit 4? and a liquid level sensor 9 that detects when the refrigerant liquid level in the liquid tank 8 reaches a predetermined level;
It is provided with an alarm, such as a warning light 10, which is activated by the detection action of the sensor 9, and a control switch 11 which is turned on in conjunction with the closing operation of the electromagnetic clutch pre-operation circuit 4. The control switch 11 uses a normally open relay in this embodiment. Further, this alarm circuit 7 is equipped with a timer circuit 12 which delays the ON operation of the normally open relay 11 for a predetermined period of time when the electromagnetic clutch pre-operation circuit 4 is closed.
以上の実施例構造によれば、冷媒封入作業中に温度セン
サ５の検出作用により電磁クラッチ２が断、親制御され
てコンプレッサｌが駆動、停止全繰返すと、冷凍系内に
冷媒が十分に封入されていない状態あるいは略適正量封
入された状態でも、コンプレッサ１の再駆動直後に一時
的にリキッドタンク８内の冷媒液が満杯状態になること
がめるが、電磁クラツチ作前回路４が閉成してコンプレ
ッサ１が再駆動しても、警報回路７の常開リレー１１は
直ちにオン作動することはなく、タイマー回路１２で設
定した時定数の間オン作動が遅延される。従って、リキ
ッドタンク８内の冷媒液が一時的に満杯状態になって液
位センサ９が検出作用しても警告灯１０が点灯すること
はなく、作業者の誤認を回避するこ七ができる。According to the structure of the above embodiment, when the electromagnetic clutch 2 is disconnected due to the detection action of the temperature sensor 5 during the refrigerant filling operation, and the compressor I is repeatedly driven and stopped by the parent control, the refrigerant is sufficiently filled into the refrigeration system. Even if the refrigerant liquid is not filled in the liquid tank 8 or the refrigerant liquid is filled in a substantially appropriate amount, the refrigerant liquid in the liquid tank 8 may temporarily become full immediately after the compressor 1 is driven again. Even if the compressor 1 is re-driven, the normally open relay 11 of the alarm circuit 7 is not turned on immediately, but is delayed for a time constant set by the timer circuit 12. Therefore, even if the refrigerant liquid in the liquid tank 8 temporarily becomes full and the liquid level sensor 9 acts to detect it, the warning light 10 will not be turned on, making it possible to avoid misunderstandings by the operator.
また、冷媒封入量が適正値よシも超過した場合には、リ
キッドタンク８内の冷媒液位は前記所定時間経過後も所
定レベル以上となっているため、この場合、制御ヌイッ
チ１１がオン作動することによって直ちに警告灯】０が
点灯して作業者に過封入であることを報せることができ
るう発明の効果
以上のように本発明によれば、冷媒封入過程でコンプレ
ッサが駆動、停止を繰返す際に、冷凍系内の冷媒量が不
足気味もしくは略適正状態の場合にあっても、コンプレ
ッサの再駆動時にリキッドタンク内の冷媒液が一時的に
満杯状態になろうとも、制御スイッチのオン作動を所定
時間遅延させるため警報器が作動して作業者が誤認する
のを回避でき、従って、冷媒過封入全誤認して封入量が
適正もしくは不足でろるのに冷媒を排出させて冷凍能力
を低下させてしまう不祥事を誘発するのを防止できると
いう実用上多大な効果金石する。In addition, if the amount of refrigerant charged exceeds the appropriate value, the refrigerant level in the liquid tank 8 remains at a predetermined level or higher even after the elapse of the predetermined time, so in this case, the control switch 11 is turned on. Effects of the Invention As described above, according to the present invention, the warning light (warning light) 0 lights up immediately to notify the operator of overfilling. When repeating the process, even if the amount of refrigerant in the refrigeration system is insufficient or almost the correct amount, even if the refrigerant in the liquid tank temporarily becomes full when the compressor is restarted, the control switch will not be turned on. By delaying the activation for a predetermined period of time, it is possible to prevent the alarm from activating and causing a misunderstanding by the operator. Therefore, the refrigerant can be discharged and the refrigerating capacity can be reduced when the refrigerant is mistakenly detected as being overfilled and the amount of refrigerant is incorrect or insufficient. It has a great practical effect of preventing the occurrence of scandals that can lead to declines.
図面は本発明の実施例を示す略示的系統図で必る。
１・・・コンプレッサ、２・・・電磁クラッチ、３・・
・工バボレータ、４・・・Ｉｔ！クラツチ作前回路、５
・・・温度センサ、７・・・警報回路、８・・・リキッ
ドタンク、９・・・液位センサ、１０・・・警報器、１
１・・・制御スイッチ、１２・・・タイマー回路。
外２名The drawings are meant to be schematic diagrams illustrating embodiments of the invention. 1... Compressor, 2... Electromagnetic clutch, 3...
・Worker Borator, 4...It! Clutch pre-saku circuit, 5
...Temperature sensor, 7...Alarm circuit, 8...Liquid tank, 9...Liquid level sensor, 10...Alarm, 1
1... Control switch, 12... Timer circuit. 2 people outside
Claims (1)
検出作用にもとづいてコンプレツサの電磁クラツチを断
続制御する電磁クラツチ作動回路に、リキツドタンクの
冷媒液位を検出する液位センサと該センサの検出作用に
よつて作動される警報器および電磁クラツチ作前回路の
閉成作動に連動してオン作動する制御スイツチとを備え
た警報回路を接続すると共に、該警報回路に前記制御ス
イツチのオン作動を所定時間遅延させるタイマー回路を
弁装したことを特徴とする冷媒過封入警報装置。(1) An electromagnetic clutch operation circuit that intermittently controls the electromagnetic clutch of the compressor based on the detection action of a temperature sensor that detects the outlet temperature of the evaporator, and a liquid level sensor that detects the refrigerant level in the liquid tank and the detection action of the sensor. An alarm circuit is connected to the alarm circuit, which includes an alarm that is activated by the above operation, and a control switch that is turned on in conjunction with the closing operation of the electromagnetic clutch pre-operation circuit, and the on-operation of the control switch is connected to the alarm circuit for a predetermined period of time. A refrigerant overfill warning device characterized by being equipped with a timer circuit that delays the delay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13946484A JPS6117877A (en) | 1984-07-05 | 1984-07-05 | Alarm device for over-encapsulation of refrigerant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13946484A JPS6117877A (en) | 1984-07-05 | 1984-07-05 | Alarm device for over-encapsulation of refrigerant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6117877A true JPS6117877A (en) | 1986-01-25 |
Family
ID=15245838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13946484A Pending JPS6117877A (en) | 1984-07-05 | 1984-07-05 | Alarm device for over-encapsulation of refrigerant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6117877A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6914363B2 (en) | 1999-10-18 | 2005-07-05 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
| USRE39416E1 (en) | 1999-01-08 | 2006-12-05 | Lg Electronics Inc. | Structure of rotor for outer rotor type brushless motor |
| USRE41621E1 (en) | 1999-10-19 | 2010-09-07 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
-
1984
- 1984-07-05 JP JP13946484A patent/JPS6117877A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE39416E1 (en) | 1999-01-08 | 2006-12-05 | Lg Electronics Inc. | Structure of rotor for outer rotor type brushless motor |
| US7441423B2 (en) | 1999-10-18 | 2008-10-28 | Lg Electronics Inc. | Drum type washing machine having a driving unit |
| US7131178B2 (en) | 1999-10-18 | 2006-11-07 | Lg Electronics Inc. | Method of forming a drum type washing machine having a driving unit |
| US7114355B2 (en) | 1999-10-18 | 2006-10-03 | Lg Electronics, Inc. | Drum type washing machine having a driving unit |
| US7166950B2 (en) | 1999-10-18 | 2007-01-23 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
| US7305857B2 (en) | 1999-10-18 | 2007-12-11 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
| US6914363B2 (en) | 1999-10-18 | 2005-07-05 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
| US7596973B2 (en) | 1999-10-18 | 2009-10-06 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
| US8087148B2 (en) | 1999-10-18 | 2012-01-03 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
| US8677788B2 (en) | 1999-10-18 | 2014-03-25 | Lg Electronics Inc. | Method of forming a drum type washing machine having a driving unit |
| USRE41621E1 (en) | 1999-10-19 | 2010-09-07 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
| USRE42967E1 (en) | 1999-10-19 | 2011-11-29 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
| USRE43196E1 (en) | 1999-10-19 | 2012-02-21 | Lg Electronics Inc. | Structure of driving unit in drum type washing machine |
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