JPH07117284B2 - Operation control device for air conditioner - Google Patents

Operation control device for air conditioner

Info

Publication number
JPH07117284B2
JPH07117284B2 JP2144810A JP14481090A JPH07117284B2 JP H07117284 B2 JPH07117284 B2 JP H07117284B2 JP 2144810 A JP2144810 A JP 2144810A JP 14481090 A JP14481090 A JP 14481090A JP H07117284 B2 JPH07117284 B2 JP H07117284B2
Authority
JP
Japan
Prior art keywords
air conditioner
abnormality detection
stop signal
set time
abnormality
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 - Fee Related
Application number
JP2144810A
Other languages
Japanese (ja)
Other versions
JPH0439558A (en
Inventor
功二 鎌房
昭 堀川
修 田中
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.)
Daikin Industries Ltd
Original Assignee
Daikin 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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP2144810A priority Critical patent/JPH07117284B2/en
Publication of JPH0439558A publication Critical patent/JPH0439558A/en
Publication of JPH07117284B2 publication Critical patent/JPH07117284B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、空気調和装置の運転制御装置に係り、特に、
保護装置の誤作動による異常停止の防止対策に関する。
Description: TECHNICAL FIELD The present invention relates to an operation control device for an air conditioner, and more particularly,
Measures to prevent abnormal stop due to malfunction of protective device.

(従来の技術) 従来より、例えば特開平1-147261号公報に開示される如
く、空気調和装置の電源に接続される保護回路におい
て、圧縮機等の各機器の異常作動時に開作動する電磁リ
レーの接点と、通電の遮断により作動する保護リレーと
を直列に接続し、各機器の異常作動時に、保護回路の通
電の遮断により保護リレーを作動させ、該保護リレーの
作動に応じて空気調和装置を異常停止させることによ
り、各機器の破損等を保護しようとするものは公知の技
術である。
(Prior Art) Conventionally, as disclosed in, for example, Japanese Patent Laid-Open No. 1-147261, in a protection circuit connected to a power supply of an air conditioner, an electromagnetic relay that opens when abnormal operation of each device such as a compressor occurs. , And a protection relay that operates when power is cut off are connected in series, and when the equipment malfunctions, the protection relay is actuated by cutting the power supply to the protection circuit, and the air conditioner is activated according to the operation of the protection relay. It is a well-known technique to protect a device from damage by abnormally stopping the device.

(発明が解決しようとする課題) ところで、上記従来のもののような保護回路への通電停
止は、各機器の保護リレーの開作動だけでなく、外部の
何からの原因により、空気調和装置への電源の供給が一
時的に停止されるいわゆる瞬間停電によっても生じう
る。
(Problems to be Solved by the Invention) By the way, stopping the energization of the protection circuit as in the above-described conventional one is not limited to the opening operation of the protection relay of each device, but also to the air conditioner due to some external cause. It can also be caused by a so-called momentary power failure in which the power supply is temporarily stopped.

しかしながら、上記従来のものでは、瞬間停電時にも、
見掛上保護リレーが作動したのと同じことになり、いっ
たん運転を制御する制御装置をリセットしないとそのま
ま空気調和装置の運転を再開することなく、異常停止し
てしまうという問題があった。
However, in the above-mentioned conventional one, even during a momentary power failure,
Apparently, the protection relay operates in the same way, and there is a problem that unless the control device that controls the operation is reset, the air conditioner does not restart and then abnormally stops.

一方、上記保護回路の保護リレーとは別に瞬間停電時の
みを検出する検出部を設けたり、保護リレーが作動する
のに要する通電停止時間を長くして瞬間停電による通電
停止と保護装置の作動による通電停止とを判別すること
が考えられるが、瞬間停電時を検出する検出部を設ける
とコストの増大を招き、保護リレー作動を判断するため
の通電停止時間を長くすると真の異常時における各機器
の保護がおろそかにされ、信頼性の低下を招く虞れがあ
る。
On the other hand, in addition to the protection relay of the above protection circuit, a detection unit that detects only momentary power failure is provided, or the energization stop time required for the protection relay to operate is extended to stop energization due to momentary power failure and the protection device operates. It may be possible to determine that the power supply is stopped, but if a detection unit that detects a momentary power failure is provided, the cost will increase, and if the power supply stop time for determining the protection relay operation is lengthened, each device in the event of a true abnormality Protection is neglected, which may lead to a decrease in reliability.

本発明は斯かる点に鑑みてなされたものであり、その目
的は、瞬間停電による保護回路の通電停止時には空気調
和装置の異常停止を回避する手段を講ずることにより、
保護回路の誤作動を防止して、異常停止回数の低減を図
ることにある。
The present invention has been made in view of such a point, and an object thereof is to provide means for avoiding an abnormal stop of an air conditioner at the time of stopping the energization of a protection circuit due to a momentary power failure,
The purpose is to prevent malfunction of the protection circuit and reduce the number of abnormal stops.

(課題を解決するための手段) 上記目的を達成するため本発明の解決手段は、第1図に
示すように、空気調和装置の運転制御装置として、空気
調和装置の電源に接続された異常検出回路(100)と、
該異常検出回路(100)に配置され、空気調和装置の圧
縮機、ファン等の機器の異常作動時に開作動して異常検
出回路への通電を遮断する異常時検出用開閉器(101)
と、上記異常検出回路(100)に上記異常時検出用開閉
器(101)とは直列に接続され、異常検出回路(100)の
通電停止時に停止信号を出力する保護用継電器(30Fx)
とを設ける。
(Means for Solving the Problem) To achieve the above object, the solution means of the present invention is, as shown in FIG. 1, as an operation control device of an air conditioner, abnormality detection connected to a power supply of the air conditioner. Circuit (100),
A switch (101) for detecting an abnormality, which is arranged in the abnormality detection circuit (100) and opens when the equipment such as a compressor or a fan of the air conditioner operates abnormally to shut off the power supply to the abnormality detection circuit.
And the abnormality detection circuit (100) and the abnormality detection switch (101) are connected in series, and a protection relay (30Fx) that outputs a stop signal when the abnormality detection circuit (100) is de-energized.
And.

そして、該保護用継電器(30Fx)からの停止信号が第1
設定時間以上継続したときは上記各機器の運転を中断さ
せるとともに、停止信号が上記第1設定時間よりも長い
第2設定時間以上継続したときには空気調和装置を異常
停止させる一方、第2設定時間が経過するまでに停止信
号が解除されたときには各機器の運転を中断後所定時間
経過したときに再開させる制御する制御手段(102)を
設ける構成としたものである。
And the stop signal from the protective relay (30Fx) is the first
When the operation continues for more than the set time, the operation of each device is interrupted, and when the stop signal continues for the second set time longer than the first set time, the air conditioner is abnormally stopped while the second set time is stopped. The control means (102) is provided to control the operation of each device when the stop signal is released before the elapse of a predetermined time after the operation is stopped.

(作用) 以上の構成により、本発明では、空気調和装置の各機器
が過熱するなどの異常が生じると、異常検出回路(10
0)に接続される異常検出用開閉器(101)が開作動し
て、異常検出回路(100)の通電が遮断され、保護用継
電器(30Fx)からの停止信号が出力される。
(Operation) With the above configuration, in the present invention, when an abnormality such as overheating of each device of the air conditioner occurs, the abnormality detection circuit (10
The abnormality detection switch (101) connected to 0) opens, the abnormality detection circuit (100) is de-energized, and a stop signal is output from the protection relay (30Fx).

その場合、本発明では、制御手段(102)により、停止
信号が第1設定時間以上継続したときにはいったん各機
器の運転を中断させるが、その後すぐに停止信号が解除
されると、運転が中断されてから所定時間待機した後に
各機器の運転を再開するよう制御される。そして、第1
設定時間よりも長い第2設定時間以上停止信号が継続し
て出力されたときにはじめて装置の異常と判断して、空
気調和装置を異常停止させるよう制御されるので、瞬間
停電による保護用継電器(30Fx)からの停止信号により
空気調和装置を異常停止させるような異常の誤検知が防
止される。したがって、信頼性の低下を招くことなく、
異常停止回数が低減することになる。
In that case, in the present invention, the control means (102) temporarily suspends the operation of each device when the stop signal continues for the first set time or longer, but when the stop signal is released immediately thereafter, the operation is suspended. After waiting for a predetermined time, the operation of each device is restarted. And the first
Only when the stop signal is continuously output for the second set time longer than the set time, it is judged that the device is abnormal and the air conditioner is controlled to stop abnormally. The stop signal from 30Fx) prevents erroneous detection of an abnormality that abnormally stops the air conditioner. Therefore, without causing a decrease in reliability,
The number of abnormal stops will be reduced.

(実施例) 以下、本発明の実施例について、図面に基づき説明す
る。
(Example) Hereinafter, the Example of this invention is described based on drawing.

第2図は空気調和装置の室外ユニット(A)側に配置さ
れる室外制御ユニット(15)の内部および接続される各
機器の配線関係を示す電気回路図である。図中、(MC
1)は第1圧縮機(図示せず)のインバータ(図示せ
ず)の周波数変換回路(INV)に接続された圧縮機モー
タ、(MC2)は第2圧縮機(図示せず)用のモータ、(5
2C1)および(52C2)は各々周波数変換回路(INV)およ
びモータ(MC2)を作動させる電磁接触器で、上記各機
器はヒューズボックス(FS)、漏電ブレーカ(BR1)を
介して三相交流電源に接続されるとともに、室外制御ユ
ニット(15)とは単相交流電源で接続されている。ま
た、(MF)は室外ファン(図示せず)用のファンモー
タ、(52FH)及び(52FL)は該ファンモータ(MF)を作
動させる電磁接触器であって、それぞれ三相交流電源の
うちの単相成分に対して並列に接続され、電磁接触器
(52FH)が接続状態になったときには室外ファンが強風
(標準風量)に、電磁接触器(52FL)が接続状態になっ
たときには室外ファンが弱風になるよう択一切換え可能
になされている。
FIG. 2 is an electric circuit diagram showing the wiring relationship between the inside of the outdoor control unit (15) arranged on the outdoor unit (A) side of the air conditioner and the connected devices. In the figure, (MC
1) is a compressor motor connected to the frequency conversion circuit (INV) of the inverter (not shown) of the first compressor (not shown), and (MC2) is a motor for the second compressor (not shown). ,(Five
2C 1 ) and (52C 2 ) are electromagnetic contactors that operate the frequency conversion circuit (INV) and motor (MC 2 ), respectively. The above devices are three-phase via fuse box (FS) and earth leakage breaker (BR1). In addition to being connected to an AC power supply, it is also connected to the outdoor control unit (15) by a single-phase AC power supply. Further, (MF) is a fan motor for an outdoor fan (not shown), and (52F H ) and (52F L ) are electromagnetic contactors for operating the fan motor (MF), each of which is a three-phase AC power source. When the electromagnetic contactor (52F H ) was connected in parallel to one of the single-phase components, the outdoor fan was in strong wind (standard air volume) and the electromagnetic contactor (52F L ) was in connection. Sometimes it is possible to switch between the outdoor fans so that the wind is weak.

次に、室外制御ユニット(15)の内部にあっては、電磁
リレーの常開接点(RY1)〜(RY8)が単相交流電源に対
して並列に接続され、これらは順に、四路切換弁(図示
せず)の電磁リレー(20S)、周波数変換回路(INV)の
電磁接触器(52C1)、第2圧縮機の電磁接触器(52
C2)、室外ファン用電磁接触器(52FH),(52FL)、ホ
ットガス用電磁弁(図示せず)の電磁リレー(SVP)、
インジェクション用電磁弁(図示せず)の電磁リレー
(SVT)及びアンローダ用電磁弁(図示せず)の電磁リ
レー(SVL)のコイルに直列に接続され、室外制御ユニ
ット(15)に直接又は室内制御ユニット(16)を介して
入力される各センサ(TH1)〜(TH7)の信号に応じて開
閉されて、上記各電磁接触器あるいは電磁リレーの接点
を開閉させるものである。また、端子CNには、室外電動
膨張弁(図示せず)の開度を調節するパルスモータ(EV
1)のコイルが接続されている。
Next, inside the outdoor control unit (15), the normally open contacts (RY 1 ) to (RY 8 ) of the electromagnetic relay are connected in parallel to the single-phase AC power supply, and these are connected in order to the four-way connection. Switching valve (not shown) electromagnetic relay (20S), frequency conversion circuit (INV) electromagnetic contactor (52C 1 ), second compressor electromagnetic contactor (52
C 2 ), electromagnetic contactor for outdoor fan (52F H ), (52F L ), electromagnetic relay for hot gas solenoid valve (not shown) (SV P ),
Directly connected to the outdoor control unit (15) directly to the coil of the solenoid relay (SV T ) of the injection solenoid valve (not shown) and the solenoid relay (SV L ) of the unloader solenoid valve (not shown). It is opened / closed in response to signals from the sensors (TH1) to (TH7) input via the indoor control unit (16) to open / close the contacts of the electromagnetic contactors or electromagnetic relays. In addition, the terminal CN has a pulse motor (EV) for adjusting the opening of an outdoor electric expansion valve (not shown).
The coil of 1 ) is connected.

ここで、図中右側の回路は空気調和装置の各機器の異常
を検出する異常検出回路としての保護回路(100)であ
って、(CH1),(CH2)はそれぞれ第1圧縮機、第2圧
縮機のオイルフォーミング防止用ヒータで、それぞれ電
磁接触器(52C1),(52C2)と直列に接続され上記各圧
縮機が停止時に電流が流れるようになされている。さら
に、(52C1)はモータ(MC1)の過電流リレーの常閉接
点、(49C1),(49C2)はそれぞれ第1圧縮機、第2圧
縮機の温度上昇保護用スイッチ、(63H1),(63H2)は
それぞれ第1圧縮機、第2圧縮機の圧力上昇保護用スイ
ッチ、(51F)はファンモータ(MF)の過電流リレーの
常閉接点であって、これらは保護回路(100)にそれぞ
れ直列に接続されており、通常運転時には閉じられて保
護回路(100)を通電状態に維持する一方、各機器の過
熱等の異常時には、開作動して電源から保護回路(10
0)への通電を遮断する異常検出用開閉器(101)が構成
されている。
Here, the circuit on the right side of the figure is a protection circuit (100) as an abnormality detection circuit for detecting an abnormality in each device of the air conditioner, and (CH 1 ) and (CH 2 ) are the first compressor, A heater for preventing oil forming of the second compressor, which is connected in series with the electromagnetic contactors (52C 1 ) and (52C 2 ), respectively, so that a current flows when the above compressors are stopped. Further, (52C 1 ) is a normally-closed contact of the overcurrent relay of the motor (MC 1 ), (49C 1 ) and (49C 2 ) are switches for temperature rise protection of the first compressor and the second compressor, respectively (63H 1 ) and (63H 2 ) are switches for pressure rise protection of the first and second compressors respectively, (51F) is a normally closed contact of the overcurrent relay of the fan motor (MF), and these are protection circuits. They are connected in series to each (100) and are closed during normal operation to maintain the protection circuit (100) in the energized state.
An abnormality detection switch (101) for interrupting the power supply to (0) is configured.

また、(30Fx)は上記保護回路(100)に異常検出用開
閉器(101)とは直列に接続された保護リレーであっ
て、その常開接点(30Fx-1)は、上記各電磁リレー(52
C1)〜(52FL)の合流配線に介設されている。
Further, (30Fx) is a protection relay connected in series to the protection circuit (100) and the abnormality detection switch (101), and the normally open contact (30Fx -1 ) is the electromagnetic relay. (52
C 1) ~ (is interposed merging wiring 52F L).

すなわち、保護回路(100)において、空気調和装置の
運転中、通常運転時には、異常検出用開閉器(101)が
閉じられて保護リレー(30Fx)がオンになり、その接点
(30Fx-1)が閉じられ、各機器に電力を供給する一方、
各機器の異常により異常検出用開閉器(101)が開作動
すると、保護リレー(30Fx)がオフになり、つまり停止
信号が出力される。そして、その接点(30Fx-1)が開か
れることにより、圧縮機、ファンへの電力の供給が停止
され、運転を停止させるようになされている。
That is, in the protection circuit (100), during operation of the air conditioner and during normal operation, the abnormality detection switch (101) is closed, the protection relay (30Fx) is turned on, and its contact (30F x-1 ) Is closed and supplies power to each device,
When the abnormality detection switch (101) is opened due to an abnormality in each device, the protection relay (30Fx) is turned off, that is, a stop signal is output. Then, by opening the contact (30F x-1 ), the supply of electric power to the compressor and the fan is stopped, and the operation is stopped.

そして、室外制御ユニット(15)には破線で示されるCP
U(15a)が内蔵され、該CPU(15a)により、保護リレー
(30Fx)、各室内制御ユニット(16)…、あるいは各セ
ンサ類から入力される信号に応じて各機器の動作を制御
するようになされている。
The outdoor control unit (15) has a CP indicated by a broken line.
The U (15a) is built in, and the CPU (15a) controls the operation of each device according to the signal input from the protection relay (30Fx), each indoor control unit (16), ... Or each sensor. Has been done.

第3図は、上記CPU(15a)による空気調和装置の制御内
容を示し、ステップS1で通常運転を行いながら、ステッ
プS2で上記保護リレー(30Fx)がオフになり停止信号が
出力されたか否かを判別し、停止信号が出力されるまで
はステップS1の通常運転を行って、保護リレー(30Fx)
から停止信号が出力されると、ステップS3に移行する。
そして、保護リレー(30Fx)から停止信号が第1設定時
間T1(例えば100msec程度の時間)以上継続して出力さ
れると、装置の異常の虞れがあると判断して、ステップ
S4に進み、ステップS4で圧縮機、ファンの運転を中断さ
せる。なお、その間他の機器への通電は継続されてい
る。
Figure 3 shows the control contents of the air conditioner of the CPU (15a), while the normal operation in step S 1, whether the protective relays (30Fx) is output stop signal turns off in step S 2 Whether or not it is determined, the normal operation of step S 1 is performed until the stop signal is output, and the protection relay (30Fx)
When the stop signal is output from, the process proceeds to step S 3 .
If the stop signal is continuously output from the protection relay (30Fx) for the first set time T 1 (for example, about 100 msec), it is determined that there is a possibility that the device is abnormal, and the step
Proceed to S 4 , and stop the operation of the compressor and fan in step S 4 . During that time, power is continuously supplied to other devices.

その後、ステップS5で、停止信号が解除されたか否かを
判別し、停止信号が解除されていない場合、ステップS6
に進み、ステップS6の判別で、保護リレー(30Fx)から
の停止信号が解除されないうちに上記第1設定時間T1
りも長い第2設定時間T2(例えば600msec程度の時間)
が経過すると、装置の異常と判断し、ステップS7に進ん
で空気調和装置を異常停止させる。
Then, in step S 5 , it is determined whether or not the stop signal is released. If the stop signal is not released, step S 6
The process proceeds, if it is determined at the step S 6, the protective relays (30Fx) the longer second set time than the first set time T 1 T 2 (for example, about 600msec time) while the stop signal is not released from
There When elapsed, determines that the abnormality of the apparatus, the abnormality to stop the air conditioner proceeds to step S 7.

一方、上記ステップS5の判別で、第2設定時間T2が経過
するまでに停止信号が解除されると、ステップS8に移行
して、所定時間T3(例えば4分間程度の時間)の間待機
して、所定時間T3が経過すると、ステップS9で中断して
いた圧縮機、ファンの運転を再開した後、ステップS1
通常運転に復帰する。
On the other hand, if the stop signal is released before the second set time T 2 elapses in the determination in step S 5 , the process proceeds to step S 8 and a predetermined time T 3 (for example, about 4 minutes) and while waiting a predetermined time T 3 has elapsed, the compressor has been interrupted in step S 9, after resuming the operation of the fan, to return to normal operation in step S 1.

上記ステップS3〜S9の制御により、保護リレー(保護用
継電器)(30Fx)からの停止信号が第1設定時間T1以上
継続したときは上記各機器の運転を中断させるととも
に、上記第1設定時間T1よりも長い第2設定時間T2以上
継続したときには空気調和装置を異常停止させる一方、
第2設定時間T2が経過するまでに停止信号が中断したと
きには各機器の運転を中断後所定時間T3が経過したとき
に再開させるよう制御する制御手段(102)が構成され
ている。
When the stop signal from the protection relay (protection relay) (30Fx) continues for the first set time T 1 or more by the control of steps S 3 to S 9 described above, the operation of each device is interrupted and the first While continuing the second set time T 2 longer than the set time T 1 , the air conditioner is abnormally stopped,
When the stop signal is interrupted before the second set time T 2 elapses, the control means (102) is configured to control the operation of each device to be resumed when a predetermined time T 3 elapses after the interruption.

したがって、本発明では、空気調和装置の圧縮機(1)
等の各機器が過熱するなどの異常が生じると、保護回路
(異常検出回路)(100)に接続される異常検出用開閉
器(101)が開作動して、保護回路(100)の通電が遮断
され、保護リレー(保護用継電器)(30Fx)から停止信
号が出力される。
Therefore, in the present invention, the compressor (1) of the air conditioner is
When an abnormality such as overheating of each device occurs, the abnormality detection switch (101) connected to the protection circuit (abnormality detection circuit) (100) opens and the protection circuit (100) is energized. It is cut off, and a stop signal is output from the protection relay (protection relay) (30Fx).

ここで、空気調和装置の電源が瞬間停電することがあ
り、その場合にも保護回路(100)の通電が遮断状態に
なる。したがって、保護リレー(30Fx)からの停止信号
に応じて、そのまま空気調和装置を異常停止させると、
このような瞬間停電時にも、各機器に異常がないのに異
常があるのと同じ処理がなされて異常停止され、リセッ
トしないと運転を再開することができないことになる。
Here, the power supply of the air conditioner may momentarily lose power, and even in that case, the protection circuit (100) is de-energized. Therefore, if the air conditioner is stopped abnormally as it is in response to the stop signal from the protection relay (30Fx),
Even in such a momentary power failure, the same processing as if there is an abnormality is performed even if there is no abnormality in each device, the operation is stopped abnormally, and the operation cannot be restarted unless reset.

それに対し、本発明では、制御手段(102)により、停
止信号が第1設定時間T1以上継続したときにはいったん
各機器の運転を中断させるが、その後、停止信号が解除
されると、各機器の運転を中断後所定時間が経過したと
きに再開させるよう制御させる。そして、第1設定時間
T1よりも長い第2設定時間T2以上停止信号が継続して出
力されたときにはじめて装置の異常と判断して、空気調
和装置を異常停止させるよう制御されるので、保護リレ
ー(30Fx)による異常の誤検知を有効に防止することが
でき、よって、信頼性を維持しながら、異常の誤検知に
よる空気調和装置の異常停止回数の低減を図ることがで
きる。
On the other hand, in the present invention, the control means (102) temporarily suspends the operation of each device when the stop signal continues for the first set time T 1 or more, but thereafter, when the stop signal is released, the operation of each device is stopped. The operation is controlled to restart when a predetermined time has elapsed after the operation was interrupted. And the first set time
When the stop signal is continuously output for the second set time T 2 longer than T 1, it is judged that the device is abnormal and the air conditioner is controlled to stop abnormally. Therefore, the protection relay (30Fx) It is possible to effectively prevent erroneous detection of an abnormality due to, and thus reduce the number of abnormal stoppages of the air conditioner due to erroneous detection of an abnormality while maintaining reliability.

なお、上記実施例では、最初の保護リレー(30Fx)によ
る停止信号の出力時に、圧縮機、ファンだけを停止させ
るようにしたが、他の機器への通電を遮断するようにし
てもよいことはいうまでもない。
In the above embodiment, only the compressor and the fan are stopped at the time of outputting the stop signal by the first protection relay (30Fx), but it is also possible to cut off the power supply to other devices. Needless to say.

(発明の効果) 以上説明したように、本発明によれば、空気調和装置の
電源に接続される異常検出回路に異常検出用開閉器を介
設するとともに、この異常検出用開閉器と直列に保護用
継電器を接続して、各機器の異常に応じて異常検出用開
閉器が開作動すると保護用継電器から停止信号が出力す
るようにした空気調和装置の運転制御装置において、停
止信号が第1設定時間以上継続すると圧縮機、ファン等
の機器を中断させるとともに、その停止信号がその後解
除されると各機器の運転を中断後所定時間が経過したと
きに再開し、第1設定時間よりも長い第2設定時間以上
停止信号が継続したときのみ空気調和装置を異常停止さ
せるようにしたので、信頼性を維持しながら、異常の誤
検知による空気調和装置の異常停止回数の低減を図るこ
とができる。
(Effects of the Invention) As described above, according to the present invention, an abnormality detection switch is provided in the abnormality detection circuit connected to the power supply of the air conditioner, and the abnormality detection switch is connected in series. In the operation control device of the air conditioner, in which the protection relay is connected and the stop signal is output from the protection relay when the abnormality detection switch is opened according to the abnormality of each device, the stop signal is the first If it continues for more than the set time, the equipment such as the compressor and fan is interrupted, and if the stop signal is released after that, the operation of each equipment is restarted when a predetermined time has elapsed after the interruption and is longer than the first set time. Since the air conditioner is abnormally stopped only when the stop signal continues for the second set time or longer, it is possible to reduce the number of abnormal stop of the air conditioner due to false detection of an abnormality while maintaining reliability. You can

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

第1図は本発明の構成を示すブロック図である。第2図
及び第3図は本発明の実施例を示し、第2図は室外制御
ユニットの構成を示す電気回路図、第3図はCPUの制御
内容を示すフローチャート図である。 30Fx……保護リレー(保護用継電器) 100……保護回路(異常検出回路) 101……異常検出用開閉器 102……制御手段
FIG. 1 is a block diagram showing the configuration of the present invention. 2 and 3 show an embodiment of the present invention, FIG. 2 is an electric circuit diagram showing the configuration of the outdoor control unit, and FIG. 3 is a flow chart diagram showing the control contents of the CPU. 30Fx …… Protection relay (relay for protection) 100 …… Protection circuit (abnormality detection circuit) 101 …… Switch for abnormality detection 102 …… Control means

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−12397(JP,A) 特開 昭56−113969(JP,A) 特開 昭58−15781(JP,A) 実開 平1−167539(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-12397 (JP, A) JP 56-113969 (JP, A) JP 58-15781 (JP, A) Sankaihei 1- 167539 (JP, U)

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】空気調和装置の電源に接続された異常検出
回路(100)と、該異常検出回路(100)に配置され、空
気調和装置の圧縮機、ファン等の機器の異常作動時に開
作動して異常検出回路への通電を遮断する異常時検出用
開閉器(101)と、上記異常検出回路(100)に上記異常
時検出用開閉器(101)とは直列に接続され、異常検出
回路(100)の通電停止時に停止信号を出力する保護用
継電器(30Fx)と、該保護用継電器(30Fx)からの停止
信号が第1設定時間以上継続したときは上記各機器の運
転を中断させるとともに、停止信号が上記第1設定時間
よりも長い第2設定時間以上継続したときには空気調和
装置を異常停止させる一方、第2設定時間が経過するま
でに停止信号が解除されたときには各機器の運転を中断
後所定時間が経過したときに再開させるよう制御する制
御手段(102)とを備えたことを特徴とする空気調和装
置の運転制御装置。
1. An abnormality detection circuit (100) connected to a power source of an air conditioner, and an abnormality detection circuit (100) disposed in the abnormality detection circuit (100), which is opened when an abnormality occurs in a device such as a compressor or a fan of the air conditioner. The abnormality detection switch (101) that shuts off the power to the abnormality detection circuit and the abnormality detection switch (101) are connected in series to the abnormality detection circuit (100). A protective relay (30Fx) that outputs a stop signal when the energization of (100) is stopped, and when the stop signal from the protective relay (30Fx) continues for a first set time or longer, the operation of each of the above devices is interrupted. When the stop signal continues for a second set time longer than the first set time, the air conditioner is abnormally stopped, and when the stop signal is released before the second set time elapses, each device is operated. When a predetermined time has elapsed after the interruption Operation control device for air conditioner being characterized in that a control means for controlling so as to open (102).
JP2144810A 1990-06-01 1990-06-01 Operation control device for air conditioner Expired - Fee Related JPH07117284B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2144810A JPH07117284B2 (en) 1990-06-01 1990-06-01 Operation control device for air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2144810A JPH07117284B2 (en) 1990-06-01 1990-06-01 Operation control device for air conditioner

Publications (2)

Publication Number Publication Date
JPH0439558A JPH0439558A (en) 1992-02-10
JPH07117284B2 true JPH07117284B2 (en) 1995-12-18

Family

ID=15370991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2144810A Expired - Fee Related JPH07117284B2 (en) 1990-06-01 1990-06-01 Operation control device for air conditioner

Country Status (1)

Country Link
JP (1) JPH07117284B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4764222B2 (en) * 2006-03-13 2011-08-31 三菱重工業株式会社 Heat source system and control method thereof
JP4650477B2 (en) * 2007-10-30 2011-03-16 ダイキン工業株式会社 Leakage detection method
JP5423649B2 (en) * 2010-10-21 2014-02-19 ダイキン工業株式会社 Power supply system and leakage detection method
JP7466061B2 (en) * 2021-06-17 2024-04-11 東芝キヤリア株式会社 Refrigeration cycle shutoff valve control device and air conditioning device

Also Published As

Publication number Publication date
JPH0439558A (en) 1992-02-10

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