JP2636475B2 - Air conditioner failure detection circuit - Google Patents
Air conditioner failure detection circuitInfo
- Publication number
- JP2636475B2 JP2636475B2 JP2184846A JP18484690A JP2636475B2 JP 2636475 B2 JP2636475 B2 JP 2636475B2 JP 2184846 A JP2184846 A JP 2184846A JP 18484690 A JP18484690 A JP 18484690A JP 2636475 B2 JP2636475 B2 JP 2636475B2
- Authority
- JP
- Japan
- Prior art keywords
- inrush current
- power
- air conditioner
- circuit
- current limiting
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は，圧縮機の電源の周波数を可変するインバ
ータ制御装置を備えた空気調和機の故障検出回路に関す
るものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure detection circuit of an air conditioner including an inverter control device that varies a frequency of a power supply of a compressor.
［従来の技術］ 第４図は，例えば特開昭64−75841号公報に示された
従来の空気調和機の故障検出回路の全体構成ブロック
図，第５図は，主要部分の動作タイムチャート，第６図
は，制御フローチャートである。（101）は電源，（10
2）は室内制御電源，（103）は制御信号をパワーリレー
（104）とパワーモニター表示器（107）に送出する室内
制御部，（105）は室内インターフェイス部，（106）は
主操作スイッチ，（108）はパワー部，（109）は圧縮
機，（110）は室外制御電源，（111）は室外制御部，
（112）は室外インターフェイス部である。[Prior Art] FIG. 4 is a block diagram showing the overall configuration of a conventional fault detection circuit of an air conditioner disclosed in Japanese Patent Application Laid-Open No. 64-75841, and FIG. FIG. 6 is a control flowchart. (101) is power supply, (10)
2) is an indoor control power supply, (103) is an indoor control unit that sends control signals to the power relay (104) and the power monitor display (107), (105) is an indoor interface unit, (106) is a main operation switch, (108) is a power section, (109) is a compressor, (110) is an outdoor control power supply, (111) is an outdoor control section,
(112) is an outdoor interface unit.
次に動作について説明する。室内制御部（103）よ
り，パワーリレー（104）に，オフ信号を送出した後，
一定時間後に，室外制御部（111），室外インターフェ
イス部（112）よりHiレベルが，検出された場合，パワ
ーリレー（104）の接点溶着と判別し，異常表示する。
また、実開昭62−107591号公報に示されるように、整流
回路と平滑コンデンサとの間に、限流抵抗と電源投入時
の一定期間オフするスイッチ接点との並列回路を直列に
挿入したものでは、直流電流を遮断するスイッチ接点の
溶着が発生するため、平滑コンデンサと、限流抵抗及び
電源投入時の一定期間オフするスイッチ接点の並列回路
との直流回路を整流回路の出力端子間に接続して、スイ
ッチ接点の溶着を防いた整流平滑電源装置の突入電流抑
制回路が記載されている。Next, the operation will be described. After sending an OFF signal from the indoor control unit (103) to the power relay (104),
When a Hi level is detected from the outdoor control unit (111) and the outdoor interface unit (112) after a predetermined time, it is determined that the contact of the power relay (104) is welded, and an error is displayed.
In addition, as shown in Japanese Utility Model Application Laid-Open No. 62-107591, a parallel circuit of a current limiting resistor and a switch contact that is turned off for a certain period when power is turned on is inserted in series between a rectifier circuit and a smoothing capacitor. In this case, welding of switch contacts that interrupts DC current occurs, so a DC circuit consisting of a smoothing capacitor and a parallel circuit of a current limiting resistor and a switch contact that is turned off for a certain period when the power is turned on is connected between the output terminals of the rectifier circuit. Thus, there is described an inrush current suppressing circuit of a rectifying and smoothing power supply device that prevents welding of switch contacts.
［発明が解決しようとする課題］ 従来のインバータ制御装置を備えた空気調和機では，
電源投入時の突入電流防止手段として限流抵抗と並列に
接続されたリレーの接点溶着の故障を検出していない
為，リレー接点が溶着故障している場合，電源投入時の
突入電流により，整流素子が，破壊する問題があった。[Problem to be solved by the invention] In an air conditioner equipped with a conventional inverter control device,
As a means of preventing inrush current at power-on, no failure of contact welding of the relay connected in parallel with the current limiting resistor has been detected. There was a problem that the element was destroyed.
電源投入時の突入電流防止策として限流抵抗と並列に
接続されたリレーの接点溶着の故障を検出し、２次的な
部品破壊（突入電流による整流素子の破壊）を防止する
ことを目的とする。As a measure to prevent inrush current at power-on, the purpose is to detect the failure of the contact welding of the relay connected in parallel with the current limiting resistor, and to prevent the secondary component destruction (destruction of the rectifying element due to inrush current). I do.
［課題を解決するための手段］ この発明に係る空気調和機の故障検出回路は，インバ
ータ装置により駆動される空気調和機において、前記イ
ンバータ装置の整流回路部と平滑コンデンサとの直流回
路に直列に接続され、電源投入時の突入電流を制限する
突入電流制限抵抗と、この抵抗と並列に接続され、電源
投入時の突入電流を制限する突入電流制限用リレー接点
と、前記直流回路の直流電圧を検出する電圧検出手段
と、前記直流回路への電源投入時からの経過時間をカウ
ントするタイマー手段と、このタイマー手段の所定のカ
ウント時間における前記電圧検出手段の検出結果に基づ
いて前記突入電流制限用リレー接点の溶着有無を検出す
る検出手段と、を備えたものである。[Means for Solving the Problems] A failure detection circuit for an air conditioner according to the present invention is an air conditioner driven by an inverter device, which is connected in series to a DC circuit of a rectifier circuit portion of the inverter device and a smoothing capacitor. Connected, a rush current limiting resistor for limiting the rush current at power-on, a rush current limiting relay contact connected in parallel with this resistor to limit the rush current at power-on, and a DC voltage of the DC circuit. A voltage detecting means for detecting, a timer means for counting an elapsed time from when the power supply to the DC circuit is turned on, and a means for limiting the inrush current based on a detection result of the voltage detecting means in a predetermined count time of the timer means. Detecting means for detecting the presence or absence of welding of the relay contact.
［作用］ この発明における空気調和機の故障検出回路は，電源
投入時突入電流制限用リレー接点の溶着故障を判別し，
インバータの整流素子の破損を防止する。[Operation] The air conditioner failure detection circuit according to the present invention determines a welding failure of the inrush current limiting relay contact at power-on,
Prevents damage to the rectifier element of the inverter.
［実施例］ 以下，この発明の一実施例を第１図〜第３図について
説明する。Embodiment An embodiment of the present invention will be described below with reference to FIGS.
（１）は電源，（２）はこの電源の交流電圧を整流す
る整流回路，（３）は電源投入時の突入電流を防止する
制限抵抗，（４）は突入電流制限用リレー接点，（５）
は平滑コンデンサ，（６）はインバータ部，（７）は圧
縮機，（８）は突入電流制限用リレーのコイル，（９）
は突入電流制限用リレー動作制御補助リレー接点，（1
0）はスイッチング電源，（11）は母線電圧（直流電
圧）を検出する電圧検出手段である電圧検出回路、（1
2）は補助リレーのコイル駆動回路，（13）はマイクロ
コンピューターである。第２図は，電源投入時の母線電
圧及び不足電圧検出の出力の動作を示す。破線で書かれ
た動作が，突入電流制限用リレー接点（４）溶着の時の
動作で，実線は，正常時の動作である。T2時間は，突入
電流制限用リレー接点溶着時の電圧（制限抵抗を介さな
い高い電圧）を検出している時間で、電源投入後から，
解除される（Hi→Lowレベル）までの時間である。T1時
間は，リレー接点正常時の電圧（制限抵抗を介した後の
低い電圧）を検出している時間で、電源投入後から，解
除されるまでの時間である。第３図は突入電流制限用リ
レー接点（４）溶着故障検出の制御フローチャートを示
す。(1) is a power supply, (2) is a rectifier circuit for rectifying an AC voltage of the power supply, (3) is a limiting resistor for preventing an inrush current when the power is turned on, (4) is an inrush current limiting relay contact, (5) )
Is a smoothing capacitor, (6) is an inverter section, (7) is a compressor, (8) is a coil of a rush current limiting relay, (9)
Is the inrush current limiting relay operation control auxiliary relay contact, (1
0) is a switching power supply, (11) is a voltage detecting circuit which is a voltage detecting means for detecting a bus voltage (DC voltage), (1)
2) is the coil drive circuit of the auxiliary relay, and (13) is the microcomputer. FIG. 2 shows the output operation of bus voltage and undervoltage detection at power-on. The operation indicated by the broken line is the operation when welding the inrush current limiting relay contact (4), and the solid line is the operation when normal. T 2 hours, at the time that detects the voltage of the inrush current limiting relay contact welding (high voltage without passing through the limiting resistor), after the power is turned on,
This is the time until it is released (Hi → Low level). T 1 times is the time during which detects the voltage of the normal relay contact (low voltage after passing through the limiting resistor), after the power is turned on, the time until it is released. FIG. 3 shows a control flowchart for detecting a welding failure of the inrush current limiting relay contact (4).
電源投入（マイコンパワーONリセット）より，マイク
ロコンピュータ（13）にて，タイマーカウント開始し,T
s時間後 とマイコンソフト内比較データとして設定），電圧検出
回路が制限抵抗（３）を介した後の低い電圧（不足電
圧）を検出しているか、検出解除（Loレベル出力）され
ているか，マイクロコンピュータ（13）にて検出して，
解除されている時は，突入電流制限用リレー接点（４）
が溶着して，急速に平滑コンデンサ（５）に充電されて
いると判断して，故障表示し報知する。When the power is turned on (microcomputer power ON reset), the microcomputer (13) starts timer counting, and T
after s hours And setting as the comparison data in the microcomputer software), whether the voltage detection circuit has detected the low voltage (undervoltage) after passing through the limiting resistor (3), whether the detection has been released (Lo level output), or the microcomputer ( 13)
When released, inrush current limiting relay contact (4)
Is welded, it is determined that the smoothing capacitor (5) is rapidly charged, and a failure is displayed and notified.
［発明の効果］ 以上のように，この発明は、以上説明したように構成
されているので、以下に記載されるような効果を奏す
る。インバータ装置により駆動される空気調和機におい
て、前記インバータ装置の整流回路部と平滑コンデンサ
との直流回路に直列に接続され、電源投入時の突入電流
を制限する突入電流制限抵抗と、この抵抗と並列に接続
され、電源投入時の突入電流を制限する突入電流制限用
リレー接点と、前記直流回路の直流電圧を検出する電圧
検出手段と、前記直流回路への電源投入時からの経過時
間をカウントするタイマー手段と、このタイマー手段の
所定カウント時間における前記電圧検出手段の検出結果
に基づいて前記突入電流制限用リレー接点の溶着有無を
検出する検出手段と、を備えたので、電源投入時の突入
電流を防止しながら突入電流制限用リレー接点の溶着を
確実に検出するようになるため、インバータの整流素子
等の破損を確実に防止する信頼性の高い空気調和機の故
障検出回路が得られる。[Effects of the Invention] As described above, the present invention is configured as described above, and has the following effects. In an air conditioner driven by an inverter device, an inrush current limiting resistor that is connected in series to a DC circuit of a rectifier circuit unit and a smoothing capacitor of the inverter device to limit an inrush current when power is turned on, , A rush current limiting relay contact for limiting the rush current when the power is turned on, voltage detecting means for detecting the DC voltage of the DC circuit, and counting an elapsed time from when the power to the DC circuit is turned on. Timer means, and detecting means for detecting the presence or absence of welding of the inrush current limiting relay contact based on the detection result of the voltage detecting means during a predetermined count time of the timer means, so that the inrush current at the time of power-on is provided. Welding of the inrush current limiting relay contact is reliably detected while preventing damage to the rectifier element of the inverter, etc. That the failure detection circuit of reliable air conditioner is obtained.
第１図はこの発明の一実施例の基本構成図，第２図はそ
の電源投入時の各部のタイミング図，第３図はその突入
電流制限用リレー接点の溶着故障を判別のフローチャー
ト，第４図は従来例の全体ブロック図，第５図はその主
要部の動作タイムチャート図，第６図はその室内制御マ
イコンの制御フローチャートである。 図において，（３）は突入電流制限抵抗，（４）は突入
電流制限用リレー接点，（11）は電圧検出回路，（13）
はマイクロコンピュータである。 なお，各図中同一符号は同一または相当部分を示す。FIG. 1 is a basic configuration diagram of one embodiment of the present invention, FIG. 2 is a timing chart of each part when the power is turned on, FIG. 3 is a flowchart for judging a welding failure of the inrush current limiting relay contact, and FIG. FIG. 5 is an overall block diagram of a conventional example, FIG. 5 is an operation time chart of the main part, and FIG. 6 is a control flowchart of the indoor control microcomputer. In the figure, (3) is a rush current limiting resistor, (4) is a rush current limiting relay contact, (11) is a voltage detection circuit, (13)
Is a microcomputer. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
機において、前記インバータ装置の整流回路部と平滑コ
ンデンサとの直流回路に直列に接続され、電源投入時の
突入電流を制限する突入電流制限抵抗と、この抵抗と並
列に接続され、電源投入時の突入電流を制限する突入電
流制限用リレー接点と、前記直流回路の直流電圧を検出
する電圧検出手段と、前記直流回路への電源投入時から
の経過時間をカウントするタイマー手段と、このタイマ
ー手段の所定カウント時間における前記電圧検出手段の
検出結果に基づいて前記突入電流制限用リレー接点の溶
着有無を検出する検出手段と、を備えたことを特徴とす
る空気調和機の故障検出回路。In an air conditioner driven by an inverter device, an inrush current limiting resistor connected in series to a DC circuit including a rectifier circuit portion of the inverter device and a smoothing capacitor, for limiting an inrush current when power is turned on. , Connected in parallel with this resistor, an inrush current limiting relay contact for limiting the inrush current when power is turned on, voltage detecting means for detecting the DC voltage of the DC circuit, and Timer means for counting elapsed time, and detecting means for detecting the presence or absence of welding of the inrush current limiting relay contact based on the detection result of the voltage detecting means during a predetermined count time of the timer means. Failure detection circuit of the air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2184846A JP2636475B2 (en) | 1990-07-12 | 1990-07-12 | Air conditioner failure detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2184846A JP2636475B2 (en) | 1990-07-12 | 1990-07-12 | Air conditioner failure detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0473544A JPH0473544A (en) | 1992-03-09 |
| JP2636475B2 true JP2636475B2 (en) | 1997-07-30 |
Family
ID=16160339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2184846A Expired - Lifetime JP2636475B2 (en) | 1990-07-12 | 1990-07-12 | Air conditioner failure detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2636475B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426645C (en) * | 2004-04-23 | 2008-10-15 | 三菱电机株式会社 | Switch power supply circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195158U (en) * | 1983-06-13 | 1984-12-25 | 三菱電機株式会社 | AC elevator control device |
| JPS62107591U (en) * | 1985-12-23 | 1987-07-09 | ||
| JPS6475841A (en) * | 1987-09-16 | 1989-03-22 | Hitachi Ltd | Air conditioner |
-
1990
- 1990-07-12 JP JP2184846A patent/JP2636475B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426645C (en) * | 2004-04-23 | 2008-10-15 | 三菱电机株式会社 | Switch power supply circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0473544A (en) | 1992-03-09 |
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