JPH04119207U - compressor protector - Google Patents
compressor protectorInfo
- Publication number
- JPH04119207U JPH04119207U JP2143791U JP2143791U JPH04119207U JP H04119207 U JPH04119207 U JP H04119207U JP 2143791 U JP2143791 U JP 2143791U JP 2143791 U JP2143791 U JP 2143791U JP H04119207 U JPH04119207 U JP H04119207U
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- blower
- electromagnetic clutch
- power supply
- protection device
- 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
- 230000001012 protector Effects 0.000 title 1
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000004378 air conditioning Methods 0.000 claims abstract description 7
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 8
- 239000002826 coolant Substances 0.000 description 7
- 230000005856 abnormality Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
- Air-Conditioning For Vehicles (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
(57)【要約】
【目的】 ブロアの異常停止の際に，圧縮機の焼き付き
を防止することができる圧縮機の保護装置を提供するこ
と。
【構成】 駆動力が電磁クラッチ６を介して伝達される
圧縮機５０と，供給電源により駆動されるブロア８とを
備えた空調または冷却システムにおいて，前記ブロア８
への供給電流が，予め設定された下限値を下回った時に
前記電磁クラッチ６への電源供給を遮断し，圧縮機５０
の運転を停止させる。
(57) [Summary] [Purpose] To provide a compressor protection device that can prevent compressor seizure in the event of an abnormal stop of a blower. [Structure] In an air conditioning or cooling system including a compressor 50 to which driving force is transmitted via an electromagnetic clutch 6 and a blower 8 driven by a power supply, the blower 8
When the current supplied to the electromagnetic clutch 6 falls below a preset lower limit value, the power supply to the electromagnetic clutch 6 is cut off, and the compressor 50
stop operation.
Description
【０００１】0001
本考案は，空調または冷却システムに用いられる圧縮機の保護装置に関する。 The present invention relates to a protection device for a compressor used in an air conditioning or refrigeration system.
【０００２】0002
従来，車両空調用システム等において，通常の圧縮機の保護装置として吐出ガ ス温度がある設定値を越えた場合において，電磁クラッチの電源供給を遮断して ，コンプレッサーの焼付きを防止する装置が用いられている。 Conventionally, discharge gas has been used as a protection device for normal compressors in vehicle air conditioning systems, etc. If the temperature exceeds a certain set value, the power supply to the electromagnetic clutch is cut off. , devices are used to prevent compressor seizure.
【０００３】0003
しかし，この電磁クラッチへの電源供給を遮断する方法では，例えば，蒸発器 を冷却するためのブロアが何等かの原因により，停止した場合，急速な蒸発器の 熱負荷のの異常低下が起こり，膨脹弁の絞り込みに伴う吸入圧力の異常低下，こ れによるコンプレッサー温度の異常上昇という連鎖的な異常発生過程に対処する ことができないことがあった。 However, with this method of cutting off the power supply to the electromagnetic clutch, for example, If the blower for cooling the evaporator stops for some reason, the rapid evaporator An abnormal decrease in heat load occurs, and an abnormal decrease in suction pressure occurs due to throttling of the expansion valve. To deal with the chain reaction process of abnormal rise in compressor temperature due to There were some things I couldn't do.
【０００４】 しかも，異常発生時に，電磁クラッチの電源を遮断するような保護手段さえ持 っていない冷却システム又は空調システムも現在数多く存在している。0004 Moreover, it even has a protective measure that shuts off the power to the electromagnetic clutch in the event of an abnormality. There are currently many cooling or air conditioning systems in existence that do not.
【０００５】 実際にこのような冷却システム又は空調システムにおいて，蒸発器を冷却する ためのブロアは，コントロールスイッチの不具合や，接続回路の不具合によって ブロアを駆動するモータに通電されない場合があり，この時，圧縮機を焼き付か せる可能性が非常に大きい。このような場合，あとからはその原因を解明しにく く，やっかいな問題としてのこることが多かった。[0005] Actually, in such a cooling system or air conditioning system, the evaporator is cooled. The blower used for The motor that drives the blower may not be energized, and this may cause the compressor to seize up. There is a very large possibility that In such cases, it may be difficult to determine the cause later. In many cases, this problem remained as a difficult and troublesome problem.
【０００６】 そこで，本考案の技術的課題は，ブロアの異常停止の際に，圧縮機の焼き付き を防止することができる圧縮機の保護装置を提供することにある。[0006] Therefore, the technical problem of this invention is that the compressor may seize up when the blower stops abnormally. An object of the present invention is to provide a compressor protection device that can prevent the above.
【０００７】[0007]
本考案によれば，駆動力が電磁クラッチを介して伝達される圧縮機と，供給電 源により駆動されるブロアとを備えた空調または冷却システムにおいて， 前記ブロアへの供給電流が，予め設定された下限値を下回った時に前記電磁ク ラッチへの電源供給を遮断し，圧縮機の運転を停止させることを特徴とする圧縮 機の保護装置が得られる。 According to the present invention, a compressor whose driving force is transmitted via an electromagnetic clutch and a power supply In an air conditioning or cooling system with a blower driven by a source, When the current supplied to the blower falls below a preset lower limit value, the electromagnetic Compression characterized by cutting off the power supply to the latch and stopping the operation of the compressor machine protection device is obtained.
【０００８】[0008]
本考案においては，蒸発器のブロアへの通電路にトラブルが生じた場合，回路 電流が通常値よりも減少またはゼロなる。この電流を検出して，通常使用域より も電流が下まわった場合，電磁クラッチへの通電をカットすることにより，圧縮 機が異常状態になる前に，圧縮機の運転を停止することができる。 In this invention, if a problem occurs in the power path to the evaporator blower, the circuit The current is reduced from its normal value or becomes zero. By detecting this current, If the current drops below the current level, the compression is reduced by cutting off the current to the electromagnetic clutch. Compressor operation can be stopped before the machine becomes abnormal.
【０００９】[0009]
以下，本考案の実施例を図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
【００１０】 図１は本考案の実施例に係る圧縮機の保護装置を示す模式図である。0010 FIG. 1 is a schematic diagram showing a compressor protection device according to an embodiment of the present invention.
【００１１】 図１において，圧縮機５０，凝縮器５１，膨脹弁５２，蒸発器５３はそれぞれ 配管５４を介して接続され，実線の矢印５８，５９で示す方向に冷却媒体が循環 する冷却回路を構成している。この冷却回路において，気相状態の冷却媒体は， 圧縮機５０によって圧縮され，凝縮器５１で凝縮されて液相状態の冷却媒体とな るとともに潜熱を放出する。この液相状態の冷却媒体は，膨脹弁５２を介して圧 力が低下され，蒸発器５３で気化される。この際に，多量に吸熱する。気化され た冷却媒体は圧縮機５０に送られて，上述の過程を繰り返す。[0011] In FIG. 1, a compressor 50, a condenser 51, an expansion valve 52, and an evaporator 53 are each It is connected via piping 54, and the cooling medium circulates in the directions shown by solid arrows 58 and 59. It constitutes a cooling circuit. In this cooling circuit, the cooling medium in the gas phase is It is compressed by the compressor 50 and condensed by the condenser 51 to become a cooling medium in a liquid phase. and releases latent heat. This liquid-phase cooling medium is brought under pressure through the expansion valve 52. The power is reduced and vaporized in the evaporator 53. At this time, a large amount of heat is absorbed. vaporized The coolant is sent to the compressor 50 and the process described above is repeated.
【００１２】 圧縮機５０には，図示しないエンジンからの駆動力の伝達及び遮断を行う電磁 クラッチ６が設けられている。一方，蒸発器５３には，モータ駆動のファンから なるブロア８が配置されている。以上は従来の冷却回路と同様の構成を有する。0012 The compressor 50 includes an electromagnetic device that transmits and interrupts driving force from an engine (not shown). A clutch 6 is provided. On the other hand, the evaporator 53 is connected to a motor-driven fan. A blower 8 is arranged. The above configuration has the same structure as a conventional cooling circuit.
【００１３】 本考案の実施例に係る圧縮機の保護装置は，ブロアの駆動モータ８の電源線に 設けられたモータ電流検出用抵抗１と，この抵抗の両端を入力端とする電位差検 出回路と，この電位差検出回路２からの出力によってリレーを駆動するリレー駆 動回路３と，このリレー駆動回路３によって駆動される電磁リレー４とを備えて いる。電磁リレー４は，通電されることで，クラッチ電源に接続されたリレー接 点５を吸着して，開成しクラッチ電源供給を遮断する。[0013] The compressor protection device according to the embodiment of the present invention is applied to the power line of the blower drive motor 8. A motor current detection resistor 1 is provided, and a potential difference detector with both ends of this resistor as input terminals. output circuit and a relay drive that drives the relay by the output from this potential difference detection circuit 2. and an electromagnetic relay 4 driven by the relay drive circuit 3. There is. When energized, the electromagnetic relay 4 connects the relay connected to the clutch power source. It attracts point 5, opens it, and cuts off the clutch power supply.
【００１４】 次に，本考案の実施例に係る圧縮機の保護装置の動作について説明する。[0014] Next, the operation of the compressor protection device according to the embodiment of the present invention will be explained.
【００１５】 本考案の実施例に係る圧縮機の保護装置においては，モータ電流検出抵抗１に より検出された電位差Ｖ1 は，電位差検出回路２により，予め定められた電流 Ｉd ，例えば，車両用としては２Ａ，よりも高いか否かを判断する。In the compressor protection device according to the embodiment of the present invention, the potential difference V 1 detected by the motor current detection resistor 1 is determined by the potential difference detection circuit 2 to a predetermined current I d , for example, for a vehicle. It is determined whether it is higher than 2A.
【００１６】 通常運転時においては，設定電流Ｉd よりも供給される電源電流Ｉs は高い値 値を示す（Ｉd ≦Ｉs ）ので，電位差検出回路２は，駆動信号ｆm は出力されな い。During normal operation, the supplied power supply current I s has a higher value than the set current I d (I d ≦I s ), so the potential difference detection circuit 2 does not output the drive signal f m .
【００１７】 一方，異常が生じたとき，即ち，設定電流Ｉd よりも供給される電源電流Ｉs が低い場合（Ｉd ＞Ｉs ）においては，電位差検出回路２からリレー駆動回路３ に，リレー駆動信号ｆm が出力される。リレー駆動信号ｆm によってリレー駆動 信号３は駆動され，リレーの電磁コイル４に所定値の電流Ｉr を流し，リレー接 点を吸着して，クラッチ６へ供給されるクラッチ駆動電源からの電流Ｉc を遮断 する。On the other hand, when an abnormality occurs, that is, when the supplied power supply current I s is lower than the set current I d (I d > I s ), the voltage from the potential difference detection circuit 2 to the relay drive circuit 3 is A relay drive signal f m is output. The relay drive signal 3 is driven by the relay drive signal f m , and a predetermined current I r is caused to flow through the electromagnetic coil 4 of the relay, attracting the relay contact, and a current I c from the clutch drive power source is supplied to the clutch 6. cut off.
【００１８】 以上の動作によって，ブロア８の駆動モータ８ａへの電源供給が不完全である 場合には，圧縮機５０の駆動が停止され，圧縮機５０の空転に伴う焼き付き等か ら圧縮機５０を保護することができる。[0018] Due to the above operation, the power supply to the drive motor 8a of the blower 8 is incomplete. In such a case, the driving of the compressor 50 is stopped, and seizure, etc. due to the idling of the compressor 50 occurs. The compressor 50 can be protected from the above.
【００１９】 尚，例えば，蒸発器のブロアでなく，コンデンサのファン等においても，コン デンサファンへの通電時のみ電流量を本考案の実施例のようにモニタすれば，フ ァンの異常による高圧上昇を未然に防ぐことができる。[0019] Note that, for example, not only the evaporator blower but also the condenser fan, etc. If the amount of current is monitored only when the capacitor fan is energized as in the embodiment of this invention, the fan High pressure increases due to fan abnormalities can be prevented.
【００２０】[0020]
以上，説明したように，本考案によれば，蒸発器のブロアモータが回転してい ない場合に，圧縮機の電磁クラッチに通電されることを防ぐことができ，蒸発器 の熱交換不良時の圧縮機の焼付きトラブルを未然に防ぐことができる。 As explained above, according to the present invention, the blower motor of the evaporator is rotating. This prevents the electromagnetic clutch of the compressor from being energized when the This can prevent compressor seizure problems caused by poor heat exchange.
【図１】本考案の実施例に係る圧縮機の保護装置を示す
模式図である。FIG. 1 is a schematic diagram showing a compressor protection device according to an embodiment of the present invention.
１ モータ電流検出用抵抗 ２ 電位差検出回路 ３ リレー駆動回路 ４ 電磁リレー ５ リレー接点 ６ 電磁クラッチ ８ ブロア ８ａ ブロア駆動モータ ５０ 圧縮機 ５１ 凝縮器 ５２ 膨脹弁 ５３ 蒸発器 ５４ 配管 ５８ 冷却媒体の流れの方向を示す矢印 ５９ 冷却媒体の流れの方向を示す矢印 1 Motor current detection resistor 2 Potential difference detection circuit 3 Relay drive circuit 4 Electromagnetic relay 5 Relay contact 6 Electromagnetic clutch 8 Blower 8a Blower drive motor 50 Compressor 51 Condenser 52 Expansion valve 53 Evaporator 54 Piping 58 Arrow indicating direction of flow of cooling medium 59 Arrow indicating direction of flow of cooling medium
─────────────────────────────────────────────────────
──────────────────────────────────────────────── ───
【手続補正書】[Procedural amendment]
【提出日】平成３年７月１１日[Submission date] July 11, 1991
【手続補正１】[Procedural amendment 1]
【補正対象書類名】図面[Name of document to be corrected] Drawing
【補正対象項目名】図１[Correction target item name] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction details]
【図１】 [Figure 1]
Claims (1)
る圧縮機と，供給電源により駆動されるブロアとを備え
た空調または冷却システムにおいて，前記ブロアへの供
給電流が，予め設定された下限値を下回った時に前記電
磁クラッチへの電源供給を遮断し，圧縮機の運転を停止
させることを特徴とする圧縮機の保護装置。Claim 1: In an air conditioning or cooling system comprising a compressor to which driving force is transmitted via an electromagnetic clutch and a blower driven by a power supply, the current supplied to the blower is set to a preset lower limit. A compressor protection device characterized by cutting off power supply to the electromagnetic clutch and stopping operation of the compressor when the voltage falls below a value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2143791U JPH04119207U (en) | 1991-04-03 | 1991-04-03 | compressor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2143791U JPH04119207U (en) | 1991-04-03 | 1991-04-03 | compressor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04119207U true JPH04119207U (en) | 1992-10-26 |
Family
ID=31907198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2143791U Pending JPH04119207U (en) | 1991-04-03 | 1991-04-03 | compressor protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04119207U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59199318A (en) * | 1983-04-22 | 1984-11-12 | Mazda Motor Corp | Cooler for vehicle |
-
1991
- 1991-04-03 JP JP2143791U patent/JPH04119207U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59199318A (en) * | 1983-04-22 | 1984-11-12 | Mazda Motor Corp | Cooler for vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19970318 |