JP2002147906A - Refrigerating plant - Google Patents

Refrigerating plant

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Publication number
JP2002147906A
JP2002147906A JP2000345761A JP2000345761A JP2002147906A JP 2002147906 A JP2002147906 A JP 2002147906A JP 2000345761 A JP2000345761 A JP 2000345761A JP 2000345761 A JP2000345761 A JP 2000345761A JP 2002147906 A JP2002147906 A JP 2002147906A
Authority
JP
Japan
Prior art keywords
compressor
abnormal
switch
abnormality
control
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.)
Granted
Application number
JP2000345761A
Other languages
Japanese (ja)
Other versions
JP4376446B2 (en
Inventor
Yoshiro Kato
芳郎 加藤
Shigeo Takada
茂生 高田
Tetsuya Yamashita
哲也 山下
Yuji Sata
裕士 佐多
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2000345761A priority Critical patent/JP4376446B2/en
Publication of JP2002147906A publication Critical patent/JP2002147906A/en
Application granted granted Critical
Publication of JP4376446B2 publication Critical patent/JP4376446B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain a refrigerating plant, in which functions of a microcomputer are fully utilized and the circuitry is restrained to a small size. SOLUTION: The refrigerating plant includes a compressor 10, a condenser 11, a throttle part 12, and a vaporizer 13 communicating with each other by refrigerant pipes. A zero-crossing signal detector 20 outputs zero-crossing signals between phases of a three-phase power source 1, an operation shutoff switch 21 controls the power source, malfunction detectors (22a, 22b, and 22c) detect respectively various abnormal conditions in operation conditions. Further, power- source half-wave signal detectors (23a, 23b, and 23c) output respectively various anomalies as electric signals, a compressor control switch 5 operates/stops the compressor 10, and a fan air-volume controller 25 regulates the air volume to the condenser 11. A computer 28 controls a compressor control switch 5, and the controller 25, and judges a power-source frequency, a momentary power failure, a power-source opposite-phase state, abnormal conditions and an operation switch operation.

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、マイコン等の制御
回路を備えた冷凍装置に関するものであり、特に制御回
路を用いた場合においても回路の簡素化を実現可能な冷
凍装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system having a control circuit such as a microcomputer, and more particularly to a refrigeration system capable of simplifying a circuit even when a control circuit is used.

【0002】[0002]

【従来の技術】以下、従来の冷凍装置について説明す
る。従来の冷凍装置は、たとえば、三菱電機製ERA−
UB55Aにおいてはリレーシーケンス制御を主として
おり、マイコン等を応用した制御については、凝縮器能
力制御用のファン風速制御回路等に限定されていた。こ
の背景として、冷凍装置は、据付使用される現地対応で
の改造が多くその便益を図るため、制御内容が回路図か
ら追いやすくかつ改造が容易なシーケンス回路構成が取
られていた。また、冷凍装置は、メンテナンスおよび修
理などによる運転停止を極力回避する必要があるため、
マイコン制御等の新技術の導入には消極的にならざるを
得ない面があった。
2. Description of the Related Art A conventional refrigeration system will be described below. Conventional refrigeration systems include, for example, Mitsubishi Electric ERA-
In the UB55A, relay sequence control is mainly performed, and control using a microcomputer or the like is limited to a fan wind speed control circuit or the like for controlling a condenser capacity. As a background of this, the refrigerating apparatus is often remodeled for installation and use in the field, and the benefit thereof is achieved. Therefore, a sequence circuit configuration in which the control content is easy to follow from the circuit diagram and the remodeling is easy is adopted. In addition, refrigeration equipment needs to avoid operation stoppage due to maintenance and repair as much as possible.
The introduction of new technologies, such as microcomputer control, had a negative effect.

【0003】しかしながら、近年、マイコン制御の信頼
性向上に伴って、冷凍装置においてもマイコン制御が採
用されるようになってきた。その目的の多くは、シーケ
ンス回路に比して小型/低コストな制御回路構成を得る
ことと、マイコンの高機能化による高度な制御アルゴリ
ズムを実現することにある。
However, in recent years, with the improvement of the reliability of the microcomputer control, the microcomputer control has been adopted also in the refrigerating apparatus. Many of the objectives are to obtain a control circuit configuration that is smaller / lower in cost than a sequence circuit, and to realize an advanced control algorithm by increasing the functionality of a microcomputer.

【0004】上記マイコン制御を用いた従来の冷凍装置
としては、たとえば、特開平05−322390号公報
に記載の装置がある。図4は、上記従来の冷凍装置の構
成を示す図である。図4において、1は電源であり、2
は圧縮機であり、3は凝縮能力制御用の送風機であり、
4は圧縮機2を運転/停止する電磁接触器の駆動コイル
であり、4´は圧縮機2を運転/停止する電磁接触器の
接点であり、5は圧縮機制御スイッチであり、6はマイ
コン制御による圧縮機運転制御手段であり、7は手動切
り替えによる応急運転スイッチである。
[0004] As a conventional refrigeration apparatus using the microcomputer control, for example, there is an apparatus described in Japanese Patent Application Laid-Open No. 05-322390. FIG. 4 is a diagram showing a configuration of the conventional refrigeration apparatus. In FIG. 4, reference numeral 1 denotes a power source;
Is a compressor, 3 is a blower for controlling the condensation capacity,
4 is a drive coil of an electromagnetic contactor for operating / stopping the compressor 2, 4 'is a contact of the electromagnetic contactor for operating / stopping the compressor 2, 5 is a compressor control switch, and 6 is a microcomputer Compressor operation control means by control, and 7 is an emergency operation switch by manual switching.

【0005】従来の冷凍装置は、上記のように構成する
ことにより、通常はマイコン制御で圧縮機制御スイッチ
5を制御するが、マイコン制御不能時には応急運転スイ
ッチ7を応急時の設定に手動で変更し、圧縮機制御スイ
ッチ5のB接点側を通じて圧縮機2および送風機3の応
急運転を実現する。
In the conventional refrigeration system, the compressor control switch 5 is normally controlled by a microcomputer by the above-described configuration. When the microcomputer cannot be controlled, the emergency operation switch 7 is manually changed to the emergency setting. Then, the emergency operation of the compressor 2 and the blower 3 is realized through the B contact side of the compressor control switch 5.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、上記、
従来の冷凍装置においては、応急運転を意識した回路設
計のため、従来のシーケンス回路にマイコン制御を追加
した回路構成となり、回路規模が大型化する、という問
題があった。
SUMMARY OF THE INVENTION However,
The conventional refrigeration system has a problem in that the circuit configuration is designed by adding microcomputer control to the conventional sequence circuit because the circuit is designed for emergency operation, and the circuit scale becomes large.

【0007】また、従来の冷凍装置においては、通常制
御時と応急運転時との制御動作の相違を最小限に抑える
設計思想により、マイコンの能力を十分に活用し切れな
い場合がある、という問題があった。
Further, in the conventional refrigeration system, the design concept of minimizing the difference in the control operation between the normal control and the emergency operation may make it impossible to fully utilize the capabilities of the microcomputer. was there.

【0008】本発明は、上記に鑑みてなされたものであ
って、マイコンの機能を充分活用しつつ回路規模を小さ
く抑えることが可能な冷凍装置を得ることを目的とす
る。
[0008] The present invention has been made in view of the above, and an object of the present invention is to provide a refrigeration apparatus that can make full use of the functions of a microcomputer while keeping the circuit scale small.

【0009】[0009]

【課題を解決するための手段】上述した課題を解決し、
目的を達成するために、本発明にかかる冷凍装置にあっ
ては、圧縮機と凝縮器と絞り手段と蒸発器とを冷媒配管
で連通した構成とし、さらに、3相電源の相間でゼロク
ロス信号を出力するゼロクロス信号検出手段(後述する
実施の形態のゼロクロス信号検出部20に相当)と、前
記相間とは異なる相間に設けられ、後続の回路の電源を
ON/OFFする運転/停止スイッチ手段(運転停止ス
イッチ21に相当)と、前記運転/停止スイッチ手段の
2次側に設けられ、運転状態の各種異常を検知する複数
の異常検知手段(高圧圧力異常検知部22a、熱検知過
電流異常検知部22b、高圧吐出温度異常検知部22c
に相当)と、前記各異常検知手段の2次側に個別に設け
られ、異常を電気信号として出力する異常電気信号検出
手段(電源半波信号検出部23a,23b,23cに相
当)と、前記圧縮機を運転/停止させる圧縮機運転/停
止手段(圧縮機制御スイッチ5に相当)と、前記凝縮器
に対するファンの風量を調整するファン風量調整手段
(ファン風量制御部25に相当)と、低圧圧力検出値に
基づく前記圧縮機運転/停止手段の制御、前記ファン風
量調整手段の制御、ゼロクロス信号周期に基づく電源周
波数判定および瞬時停電判定、ゼロクロス信号と異常電
気信号に基づく電源逆相状態判定、異常電気信号に基づ
く異常状態および運転スイッチ操作判定、を実行する制
御手段(マイコン28に相当)と、を備えることを特徴
とする。
Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, in the refrigeration apparatus according to the present invention, the compressor, the condenser, the throttling means, and the evaporator are configured to communicate with each other through a refrigerant pipe, and further, a zero-cross signal is output between the phases of the three-phase power supply. Zero-cross signal detection means for outputting (corresponding to a zero-cross signal detection unit 20 in an embodiment to be described later) and operation / stop switch means (operation) provided between a phase different from the above-mentioned phase and for turning on / off a power supply of a subsequent circuit. A plurality of abnormality detecting means (high-pressure abnormality detecting section 22a, heat detecting overcurrent abnormality detecting section, etc.) which are provided on the secondary side of the operation / stop switch means and detect various abnormalities in the operating state. 22b, high-pressure discharge temperature abnormality detection unit 22c
Abnormal electric signal detecting means (corresponding to the power supply half-wave signal detecting units 23a, 23b, and 23c) which are individually provided on the secondary side of the abnormality detecting means and output the abnormalities as electric signals; Compressor operation / stop means for operating / stopping the compressor (corresponding to the compressor control switch 5), fan air volume adjusting means for adjusting the air flow of the fan to the condenser (equivalent to the fan air volume control unit 25), Control of the compressor operation / stop means based on the detected pressure value, control of the fan air volume adjusting means, power frequency determination and instantaneous power failure determination based on a zero-cross signal cycle, power-reverse phase determination based on a zero-cross signal and an abnormal electric signal, Control means (corresponding to the microcomputer 28) for executing an abnormal state and operation switch operation determination based on the abnormal electric signal.

【0010】つぎの発明にかかる冷凍装置において、前
記制御手段は、前記瞬時停電判定、前記異常状態および
運転スイッチ操作の判定、の順に判定処理を行い、瞬時
停電(瞬停)時には、異常状態および運転スイッチ操作
の判定を実施しないことを特徴とする。
[0010] In the refrigeration apparatus according to the next invention, the control means performs a determination process in the order of the instantaneous power failure determination, the abnormal state and the operation switch operation order. The operation switch operation determination is not performed.

【0011】つぎの発明にかかる冷凍装置において、前
記異常検知手段は、高圧圧力異常検知手段、熱検知過電
流異常検知手段、および高圧吐出温度異常検知手段で構
成され、各異常検知手段を、異常状態からの復帰が早い
順に直列に配置することを特徴とする。
[0011] In the refrigerating apparatus according to the next invention, the abnormality detecting means includes high-pressure abnormality detection means, heat detection overcurrent abnormality detection means, and high-pressure discharge temperature abnormality detection means. It is characterized in that they are arranged in series in the order of quick recovery from the state.

【0012】つぎの発明にかかる冷凍装置にあっては、
最後段の異常電気信号検出手段の直前の異常電気信号検
出手段と、当該異常電気信号検出手段に対応する異常検
知手段と、の間に、通常時CLOSEの手動のスイッチ
手段(スイッチ24に相当)を設け、前記直前の異常電
気信号検出手段だけから異常が検出された場合、前記ス
イッチ手段を「CLOSE→OPEN→CLOSE」の
順に操作することで異常状態がリセットされることを特
徴とする。
[0012] In the refrigeration apparatus according to the next invention,
Between the abnormal electric signal detecting means immediately before the abnormal electric signal detecting means at the last stage and the abnormal detecting means corresponding to the abnormal electric signal detecting means, a manual switch means for the normal CLOSE (corresponding to the switch 24) And when an abnormality is detected only from the immediately preceding abnormal electrical signal detecting means, the abnormal state is reset by operating the switch means in the order of “CLOSE → OPEN → CLOSE”.

【0013】つぎの発明にかかる冷凍装置にあっては、
前記制御手段が前記ファン風量調整手段の動作を停止さ
せた場合においても、ファンを全速運転で動作させる全
速固定手段(全開固定部26に相当)と、前記制御手段
が前記圧縮機を停止させるように前記圧縮機運転/停止
手段を制御した場合においても、前記圧縮機を動作させ
る圧縮機運転/停止スイッチ手段(圧力開閉部27に相
当)と、備え、異常発生に伴って前記制御手段が停止さ
れた場合においても、停止された機能を駆動し、応急運
転を開始することを特徴とする。
In a refrigeration apparatus according to the next invention,
Even when the control means stops the operation of the fan air volume adjusting means, a full speed fixing means (corresponding to a full open fixing portion 26) for operating the fan at full speed operation, and the control means stops the compressor. And a compressor operation / stop switch means (corresponding to the pressure opening / closing section 27) for operating the compressor even when the compressor operation / stop means is controlled, and the control means is stopped when an abnormality occurs. In this case, the stopped function is driven and the emergency operation is started.

【0014】[0014]

【発明の実施の形態】以下に、本発明にかかる冷凍装置
の実施の形態を図面に基づいて詳細に説明する。なお、
この実施の形態によりこの発明が限定されるものではな
い。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a refrigeration apparatus according to the present invention will be described below in detail with reference to the drawings. In addition,
The present invention is not limited by the embodiment.

【0015】実施の形態1.図1は、本発明にかかる冷
凍装置の構成を示す図である。図1(a)において、1
は3相電源であり、2は圧縮機のモータであり、3は凝
縮器能力制御用送風機のモータであり、4はモータ2を
運転/停止する電磁接触器(駆動コイル)であり、4´
は電磁接触器4の接点であり、5は圧縮機制御スイッチ
であり、10は圧縮機であり、11は凝縮器であり、1
2は絞り部であり、13は蒸発器であり、20はR−S
相間に挿入されたゼロクロス信号検出部であり、21は
S−T相に挿入された運転停止スイッチであり、22a
は高圧圧力異常検知部であり、22bは熱検知過電流異
常検知部であり、22cは高圧吐出温度異常検知部であ
り、23aは高圧圧力異常検出時の電源半波信号を検出
する電源半波信号検出部であり、23bは熱検知過電流
異常検出時の電源半波信号を検出する電源半波信号検出
部であり、23cは高圧吐出温度異常検出時の電源半波
信号を検出する電源半波信号検出部であり、24はスイ
ッチであり、25はファン風量制御部であり、26はフ
ァンを全速運転に固定する凝縮能力制御用の全開固定部
であり、27は圧力開閉部であり、28は制御用のマイ
コンであり、29は低圧圧力検出部である。
Embodiment 1 FIG. 1 is a diagram showing a configuration of a refrigeration apparatus according to the present invention. In FIG. 1A, 1
Is a three-phase power source, 2 is a compressor motor, 3 is a condenser performance control blower motor, 4 is an electromagnetic contactor (drive coil) for operating / stopping the motor 2, and 4 '
Is a contact of the electromagnetic contactor 4, 5 is a compressor control switch, 10 is a compressor, 11 is a condenser, 1
2 is a throttle unit, 13 is an evaporator, 20 is R-S
Reference numeral 21 denotes a zero-cross signal detection unit inserted between the phases, 21 denotes an operation stop switch inserted into the ST phase, and 22a
Is a high-pressure pressure abnormality detection unit, 22b is a heat detection overcurrent abnormality detection unit, 22c is a high-pressure discharge temperature abnormality detection unit, and 23a is a power supply half-wave that detects a power supply half-wave signal at the time of high-pressure pressure abnormality detection. A signal detection unit 23b is a power supply half-wave signal detection unit that detects a power supply half-wave signal at the time of thermal detection overcurrent abnormality detection, and 23c is a power supply half-wave signal that detects a power supply half-wave signal at the time of high pressure discharge temperature abnormality detection. A wave signal detection unit, 24 is a switch, 25 is a fan air volume control unit, 26 is a fully open fixing unit for condensing capacity control for fixing the fan at full speed operation, 27 is a pressure switching unit, Reference numeral 28 denotes a control microcomputer, and reference numeral 29 denotes a low-pressure detection unit.

【0016】また、図1(b)は、ゼロクロス信号検出
部20の概略回路構成を示す図であり、双方向のフォト
カプラを用い、電源電圧の0V近傍で信号を出力する。
たとえば、瞬時停電等電源電圧の低い状態が継続した期
間は、出力信号の幅が長くなることで検知できる。ま
た、図1(c)は、電源半波信号検出部の概略回路構成
を示す図であり、片方向のフォトカプラを用い、電源電
圧の0V近傍を境に半周期毎に反転する信号を出力す
る。また、図1(d)は、ファン風量制御部25の概略
回路構成を示す図であり、トライアックを用い、電源電
圧をON/OFFする。
FIG. 1B is a diagram showing a schematic circuit configuration of the zero-crossing signal detecting section 20, which outputs a signal near a power supply voltage of 0 V using a bidirectional photocoupler.
For example, during a period in which a low power supply voltage state such as an instantaneous power failure continues, it can be detected by increasing the width of the output signal. FIG. 1 (c) is a diagram showing a schematic circuit configuration of a power supply half-wave signal detection unit, which uses a one-way photocoupler and outputs a signal which is inverted every half cycle around a power supply voltage near 0V. I do. FIG. 1D is a diagram showing a schematic circuit configuration of the fan air volume control unit 25. The power supply voltage is turned ON / OFF using a triac.

【0017】また、本実施の形態においては、「瞬時停
電判定→異常状態(高圧圧力異常,熱検知過電流異常,
高圧吐出温度異常)および運転停止スイッチ操作(運転
停止スイッチ21のON,OFF)の判定」、の順に判
定処理を行い、瞬時停電(瞬停)時には、以降の異常状
態および運転停止スイッチの操作の判定を実施しない。
Also, in the present embodiment, the “instantaneous power failure judgment → abnormal state (high pressure abnormality, heat detection overcurrent abnormality,
Judgment of high-pressure discharge temperature abnormality) and operation stop switch operation (ON / OFF of operation stop switch 21), and in the event of an instantaneous power failure (instantaneous interruption), the subsequent abnormal state and operation of the operation stop switch are determined. No judgment is made.

【0018】また、本実施の形態においては、運転停止
スイッチ21の2次側(制御回路外)に、冷凍装置の異
常時に電気回路を開放する、高圧圧力異常検知部22
a、熱検知過電流異常検知部22b、高圧吐出温度異常
検知部22c、を直列に配置し、各異常検知部の2次側
かつ相間(制御回路内)に、各異常検出部に対応する電
源半波信号検出部(23a,23b,23c)を設け
た。なお、ここでは、異常状態からの復帰が早い異常検
知部から順に電源の近くに配置する。具体的にいうと、
高圧圧力異常検知部22a、熱検知過電流異常検知部2
2b、高圧吐出温度異常検知部22c、の順となる。
Further, in the present embodiment, a high pressure abnormality detecting section 22 is provided on the secondary side (outside of the control circuit) of the operation stop switch 21 to open an electric circuit when the refrigeration system is abnormal.
a, a heat detection overcurrent abnormality detection unit 22b and a high pressure discharge temperature abnormality detection unit 22c are arranged in series, and a power supply corresponding to each abnormality detection unit is provided on the secondary side and between phases (in the control circuit) of each abnormality detection unit. A half-wave signal detector (23a, 23b, 23c) is provided. In this case, the power supply is arranged near the power supply in order from the abnormality detection unit which recovers quickly from the abnormal state. Specifically,
High pressure abnormality detection part 22a, heat detection overcurrent abnormality detection part 2
2b, and then the high-pressure discharge temperature abnormality detection unit 22c.

【0019】また、本実施の形態においては、電源半波
信号検出部23bに直列に、通常時閉(CLOSE)の
手動のスイッチ24を設ける(制御回路外)。たとえ
ば、電源半波信号検出部23cの電源半波信号には異常
が検出されず、かつ電源半波信号検出部23bの電源半
波信号には異常が検出された場合、マイコン28では、
「異常」と判断せず、「メンテナンス等のためにスイッ
チ24がOPENになっている」と判断する。この場
合、スイッチ24を再びCLOSEすることで異常状態
がリセットされ、運転可能状態になる。
In this embodiment, a manual switch 24 which is normally closed (CLOSE) is provided in series with the power supply half-wave signal detection unit 23b (outside the control circuit). For example, if no abnormality is detected in the power supply half-wave signal of the power supply half-wave signal detection unit 23c and abnormality is detected in the power supply half-wave signal detection unit 23b,
It is determined that "the switch 24 is OPEN due to maintenance or the like" without determining "abnormal". In this case, by closing the switch 24 again, the abnormal state is reset, and the operable state is set.

【0020】また、本実施の形態においては、異常発生
時に、ファン風量制御部25の動作が停止した場合にお
いても、ファンを停止することなく全速運転に固定する
全開固定部26を備えた。また、異常発生時に、制御回
路が圧縮機制御スイッチ5をOPENとした場合におい
ても、圧縮機10を停止することなく所定の圧力以上で
電気的にCLOSEする圧力開閉スイッチ27を備え
た。これにより、マイコン制御が停止された場合におい
ても、停止された機能を駆動しての応急運転が可能とな
る。
Further, in the present embodiment, when an abnormality occurs, even when the operation of the fan air volume control unit 25 is stopped, the fully open fixing unit 26 is provided for fixing the fan to the full speed operation without stopping the fan. Further, a pressure opening / closing switch 27 is provided for electrically closing the compressor 10 at a predetermined pressure or higher without stopping the compressor 10 even when the control circuit sets the compressor control switch 5 to OPEN when an abnormality occurs. Accordingly, even when the microcomputer control is stopped, the emergency operation by driving the stopped function can be performed.

【0021】ここで、上記本発明にかかる冷凍装置の制
御アルゴリズムについて説明する。図2は、上記冷凍装
置の制御アルゴリズムを示す図である。
Here, a control algorithm of the refrigeration apparatus according to the present invention will be described. FIG. 2 is a diagram illustrating a control algorithm of the refrigeration apparatus.

【0022】まず、マイコン28では、ゼロクロス信号
検出部20からのゼロクロス信号検知割込INT1のイ
ンターバルを測定し(ステップS1、図1(b)参
照)、そのインターバルが50Hz相当か、60Hz相
当か、またはそれ以外か、を判定し、50Hz相当の場
合(ステップS2,50)、電源周波数を50Hzに確
定し(ステップS3)、60Hz相当の場合(ステップ
S2,60)、電源周波数を60Hzに確定し(ステッ
プS4)、それ以外の場合には(ステップS2,NO
T)、ステップS1へ移行する。
First, the microcomputer 28 measures the interval of the zero-cross signal detection interrupt INT1 from the zero-cross signal detection unit 20 (step S1, see FIG. 1B), and determines whether the interval is equivalent to 50 Hz or 60 Hz. Otherwise, if it is equivalent to 50 Hz (step S2, 50), the power supply frequency is determined to be 50 Hz (step S3), and if it is equivalent to 60 Hz (step S2, 60), the power supply frequency is determined to be 60 Hz. (Step S4) Otherwise (Step S2, NO
T), and proceed to step S1.

【0023】電源周波数確定後、マイコン28では、高
圧圧力異常検出時の電源半波信号検出部23からの電源
半波信号検知割込INT2があるかどうかを判定し、な
い場合(ステップS5,No)、「停止」状態と判定し
(ステップS6)、ステップS5へ移行し、ある場合に
は(ステップS5,Yes)、INT1とINT2のイ
ンターバルを測定する(ステップS7)。
After the power supply frequency is determined, the microcomputer 28 determines whether or not there is a power supply half-wave signal detection interrupt INT2 from the power supply half-wave signal detection unit 23 when a high-pressure pressure abnormality is detected. ), It is determined to be in the "stop" state (step S6), and the process proceeds to step S5. If there is (step S5, Yes), the interval between INT1 and INT2 is measured (step S7).

【0024】たとえば、上記測定結果を、予め設定され
た所定のインターバルと判断した場合(ステップS8,
Yes)、マイコン28では、「正相」として、INT
1の信号幅t1を測定し(ステップS10)、一方、所
定のインターバルではないと判断した場合には(ステッ
プS8,No)、「逆相」として、ステップS5へ移行
する。
For example, when the measurement result is determined to be a predetermined interval (step S8,
Yes), the microcomputer 28 determines that the “positive phase” is INT
The signal width t1 of 1 is measured (step S10). On the other hand, when it is determined that the time interval is not the predetermined interval (step S8, No), the process proceeds to step S5 as “opposite phase”.

【0025】信号幅t1を測定した結果、「t1>所定
値(瞬停かどうかを判断するために予め設定した値)」
が成立した場合(ステップS11,Yes)、マイコン
28では、「瞬停」と判断し(ステップS12)、ステ
ップS23へ移行する。なお、「瞬停」と判断した場合
には、以降の異常判定を行わない。一方、「t1<=所
定値」が成立した場合ステップS11,No)、マイコ
ン28では、電源半波信号検出部23aからINT2a
が出力されていない期間t2aと、電源半波信号検出部
23bからINT2bが出力されていない期間t2b
と、電源半波信号検出部23cからINT2cが出力さ
れていない期間t2cと、を測定する(ステップS1
3)。
As a result of measuring the signal width t1, "t1> predetermined value (value set in advance to judge whether it is a momentary stop)"
Is satisfied (step S11, Yes), the microcomputer 28 determines that "instantaneous stop" has occurred (step S12), and proceeds to step S23. If it is determined that the instantaneous stop has occurred, the subsequent abnormality determination is not performed. On the other hand, if “t1 <= predetermined value” is satisfied (step S11, No), the microcomputer 28 sends the INT2a signal from the power supply half-wave signal detection unit 23a to the INT2a signal.
Is not output, and the period t2b during which INT2b is not output from the power supply half-wave signal detection unit 23b.
And a period t2c during which INT2c is not output from the power supply half-wave signal detection unit 23c (step S1).
3).

【0026】測定の結果、「所定値(2)≦t2≦所定
値(3)」が成立する場合(ステップS14,No、ス
テップS15,No)、マイコン28では、この段階
で、現在の状態が「異常」と判定し(ステップS1
8)、圧縮機制御スイッチ5およびファン風量制御部2
5をOFFとする(ステップS23)。また、「t2<
所定値(2)」が成立した場合(ステップS14,Ye
s)、マイコン28では、現在の状態が異常かどうかを
判断し、「異常」と判断した場合(ステップS16,Y
es)、圧縮機制御スイッチ5およびファン風量制御部
25をOFFとする(ステップS23)。また、「所定
値(3)<t2」が成立した場合(ステップS14,N
o、ステップS15,Yes)、マイコン28では、
「停止」と判断し(ステップS20)、圧縮機制御スイ
ッチ5およびファン風量制御部25をOFFとする(ス
テップS23)。
As a result of the measurement, if "predetermined value (2) ≤t2≤predetermined value (3)" is satisfied (step S14, No, step S15, No), the microcomputer 28 changes the current state at this stage. It is determined as "abnormal" (step S1
8), compressor control switch 5 and fan air volume control unit 2
5 is turned OFF (step S23). Also, “t2 <
When the “predetermined value (2)” is satisfied (step S14, Ye
s) The microcomputer 28 determines whether or not the current state is abnormal, and if it is determined to be “abnormal” (step S16, Y
es), the compressor control switch 5 and the fan air volume control unit 25 are turned off (step S23). Further, when “predetermined value (3) <t2” is satisfied (step S14, N
o, step S15, Yes), the microcomputer 28
It is determined to be "stop" (step S20), and the compressor control switch 5 and the fan air volume control unit 25 are turned off (step S23).

【0027】一方、ステップS16の処理において、
「異常」ではないと判断した場合(ステップS16,N
o)、マイコン28では、現在の状態を「運転」と判定
し(ステップS17)、「低圧値>所定圧力」を満たし
ている場合(ステップS21,Yes)、圧縮機制御ス
イッチ5およびファン風量制御部25のON状態を保持
し(ステップS22)、「低圧値>所定圧力」を満たし
ていない場合(ステップS21,No)、圧縮機制御ス
イッチ5およびファン風量制御部25をOFFとする
(ステップS23)。
On the other hand, in the process of step S16,
When it is determined that it is not “abnormal” (step S16, N
o) The microcomputer 28 determines that the current state is “running” (step S17), and if “low pressure value> predetermined pressure” is satisfied (step S21, Yes), the compressor control switch 5 and the fan air volume control The ON state of the section 25 is maintained (step S22), and if the “low pressure value> predetermined pressure” is not satisfied (step S21, No), the compressor control switch 5 and the fan air volume control section 25 are turned off (step S23). ).

【0028】なお、制御回路の不良等で圧縮機制御スイ
ッチ5およびファン風量制御部25がOFFとなった場
合においても、冷凍装置では、全開固定部26および圧
力開閉部27をONとし、動作を停止させることなく、
応急運転を開始することができる。また、上記所定値
(2)および(3)は、確実に、異常を検出するために
予め設定された値であり、上記所定圧力は、冷凍装置の
運転能力を適正に保つための低圧値を判定するために予
め設定された値である。
Even when the compressor control switch 5 and the fan air volume control unit 25 are turned off due to a control circuit failure or the like, in the refrigeration system, the fully open fixing unit 26 and the pressure switching unit 27 are turned on and the operation is continued. Without stopping
Emergency operation can be started. Further, the predetermined values (2) and (3) are values set in advance for reliably detecting an abnormality, and the predetermined pressure is a low pressure value for maintaining the operation capability of the refrigeration device properly. This is a value set in advance for determination.

【0029】最後に、マイコン28では、現在の状態が
「異常」でかつスイッチ24がOPENかどうかを判断
し、たとえば、「異常」かつスイッチ24がOPENの
場合(ステップS24,Yes)、現在の状態の「異
常」を解除し、「停止」に変更する(ステップS2
5)。一方、ステップS24の処理において、上記以外
の場合は(ステップS24,No)、マイコン28で
は、現在の状態を保持し、ステップS5へ移行する。
Finally, the microcomputer 28 determines whether the current state is "abnormal" and the switch 24 is OPEN. For example, if "abnormal" and the switch 24 is OPEN (step S24, Yes), the current state is "abnormal". The status "abnormal" is released and changed to "stop" (step S2).
5). On the other hand, in the processing of step S24, in cases other than the above (step S24, No), the microcomputer 28 keeps the current state and proceeds to step S5.

【0030】なお、図3は、異常判別表を示す図であ
る。ここでは、前述したように、異常からの復帰が早い
順に、高圧圧力異常検出部22a、熱検知過電流異常検
出部22b、高圧吐出温度異常検出部22c、を配置し
ているので、図示のように、異常復帰の履歴を追うこと
で、すべての異常を検出できる。たとえば、パターン1
〜3のように、最初のステップで高圧圧力異常が検出さ
れた場合には、次ステップ以降で熱検知過電流異常およ
び高圧吐出温度異常が検出される可能性があり、パター
ン4,5のように、最初のSTEPで熱検知過電流異常
が検出された場合には、次ステップで圧吐出温度異常が
検出される可能性があり、最初のSTEPで高圧吐出温
度異常が検出された場合には、以降で他の異常は検出さ
れない。
FIG. 3 is a diagram showing an abnormality determination table. Here, as described above, the high-pressure pressure abnormality detection unit 22a, the heat detection overcurrent abnormality detection unit 22b, and the high-pressure discharge temperature abnormality detection unit 22c are arranged in the order of quick recovery from the abnormality. By following the history of the recovery from the abnormality, all the abnormalities can be detected. For example, pattern 1
When a high pressure abnormality is detected in the first step as in the cases of ~ 3, there is a possibility that a heat detection overcurrent abnormality and a high pressure discharge temperature abnormality will be detected in the next step and thereafter. In addition, if the heat detection overcurrent abnormality is detected in the first STEP, there is a possibility that the pressure discharge temperature abnormality is detected in the next step, and if the high pressure discharge temperature abnormality is detected in the first STEP, No other abnormalities are detected thereafter.

【0031】このように、本実施の形態においては、ゼ
ロクロス信号検出部からの信号および電源半波検出部か
らの信号を用いて、電源周波数判定と、瞬時停電判定
と、電源逆相状態判定と、異常状態および運転スイッチ
操作の判定と、を実施し、さらに、応急運転を意識しな
い回路構成としたため、マイコンの機能を充分活用しつ
つ回路規模を小さく抑えることができる。
As described above, in the present embodiment, using the signal from the zero-cross signal detection unit and the signal from the power supply half-wave detection unit, the power supply frequency determination, the instantaneous power failure determination, and the power supply reverse phase state determination are performed. The determination of the abnormal state and the operation switch operation is performed, and furthermore, the circuit configuration is made conscious of emergency operation. Therefore, the circuit scale can be reduced while utilizing the functions of the microcomputer sufficiently.

【0032】また、本実施の形態においては、「瞬時停
電判定→異常状態および運転スイッチ操作の判定」、の
順に判定処理を行い、瞬時停電(瞬停)時には、以降の
異常状態および運転スイッチの操作の判定処理を実施し
ない構成としたため、運転モードの混乱がなく、異常誤
検知等も未然に防止できる。
Further, in the present embodiment, the judgment processing is performed in the order of "judgment of instantaneous power failure → judgment of abnormal state and operation switch operation". Since the operation determination processing is not performed, there is no confusion in the operation mode, and an erroneous detection or the like can be prevented.

【0033】また、本実施の形態においては、制御回路
内に、各異常検出部に対応する電源半波信号検出部(2
3a,23b,23c)を設け、さらに、異常状態から
の復帰が早い異常検知部から順に電源の近くに配置する
構成としたため、判定処理を繰り返し実行することによ
り、すべての異常を確実に検出できる。
In the present embodiment, the power supply half-wave signal detector (2) corresponding to each abnormality detector is provided in the control circuit.
3a, 23b, and 23c), and furthermore, the abnormality detectors are arranged near the power supply in order from the abnormality detector that recovers quickly from the abnormal state, so that all abnormalities can be reliably detected by repeatedly executing the determination processing. .

【0034】また、本実施の形態においては、最終段の
直前の電源半波信号検出部に対して直列に、通常時閉
(CLOSE)の手動のスイッチ(制御回路外)を設け
る構成としたため、たとえば、最終段の電源半波信号検
出部の電源半波信号には異常が検出されず、かつ直前の
電源半波信号検出部の電源半波信号には異常が検出され
た場合に、「異常」と判断せず、「メンテナンス等のた
めにスイッチがOPENになっている」と判断すること
ができるため、このスイッチを再びCLOSEすること
で、電源を遮断することなく異常停止状態を正常状態に
復旧させることができる。
In this embodiment, a manual switch (outside the control circuit) of normally closed (CLOSE) is provided in series with the power supply half-wave signal detection unit immediately before the last stage. For example, if no abnormality is detected in the power supply half-wave signal of the power supply half-wave signal detection unit at the last stage and an abnormality is detected in the power supply half-wave signal of the immediately preceding power supply half-wave signal detection unit, the "abnormality" ), It can be determined that the switch is open for maintenance etc. By closing this switch again, the abnormal stop state can be returned to the normal state without shutting down the power supply. Can be restored.

【0035】また、本実施の形態においては、ファンを
停止することなく全速運転に固定する全開固定部と、圧
縮機を停止することなく所定の圧力以上で電気的にCL
OSEする圧力開閉スイッチを備える構成としたため、
制御回路の不良等の発生時に、マイコン制御が停止され
た場合においても、停止された機能を駆動しての応急運
転が可能となる。また、応急運転時においても、機能を
最小限に絞ることで冗長回路を極力少なくする構成とし
たため、さらなる小型化を実現できる。
Further, in this embodiment, a fully-open fixing portion for fixing the fan to full-speed operation without stopping the fan, and an electric CL at a predetermined pressure or higher without stopping the compressor.
Because it is configured to have a pressure open / close switch for OSE,
Even when the control of the microcomputer is stopped when a failure of the control circuit or the like occurs, an emergency operation by driving the stopped function can be performed. In addition, even during an emergency operation, the number of redundant circuits is reduced as much as possible by minimizing functions, so that further miniaturization can be realized.

【0036】[0036]

【発明の効果】以上、説明したとおり、本発明によれ
ば、ゼロクロス信号検出手段からの信号および異常電気
信号検出手段からの信号を用いて、電源周波数判定と、
瞬時停電判定と、電源逆相状態判定と、異常状態および
運転スイッチ操作の判定と、を実施し、さらに、応急運
転を意識しない回路構成としたため、マイコンの機能を
充分活用しつつ回路規模を小さく抑えることができる、
という効果を奏する。
As described above, according to the present invention, according to the present invention, the power supply frequency is determined by using the signal from the zero-cross signal detecting means and the signal from the abnormal electric signal detecting means.
A circuit configuration that performs instantaneous power failure judgment, power supply reverse phase state judgment, abnormal state and operation switch operation judgment, and has a circuit configuration that is not aware of emergency operation, reduces the circuit scale while making full use of the functions of the microcomputer Can be suppressed,
This has the effect.

【0037】つぎの発明によれば、「瞬時停電判定→異
常状態および運転スイッチ操作の判定」、の順に判定処
理を行い、瞬時停電(瞬停)時には、以降の異常状態お
よび運転スイッチの操作の判定処理を実施しない構成と
したため、運転モードの混乱がなく、異常誤検知等も未
然に防止できる、という効果を奏する。
According to the next invention, the judgment processing is performed in the order of “judgment of instantaneous power failure → judgment of abnormal state and operation switch operation”. Since the configuration is such that the determination process is not performed, there is an effect that there is no confusion in the operation mode, and it is possible to prevent abnormal detection or the like beforehand.

【0038】つぎの発明によれば、各異常検出手段に対
応する異常電気信号検出手段を設け、さらに、異常状態
からの復帰が早い異常検知手段から順に電源の近くに配
置する構成としたため、判定処理を繰り返し実行するこ
とにより、すべての異常を確実に検出できる、という効
果を奏する。
According to the next invention, the abnormal electric signal detecting means corresponding to each abnormal detecting means is provided, and the abnormality detecting means which recovers from the abnormal state quickly is arranged near the power supply in order from the abnormal detecting means. By repeatedly executing the processing, there is an effect that all abnormalities can be reliably detected.

【0039】つぎの発明によれば、最終段の直前の異常
電気信号検出手段に対して直列に、通常時CLOSEの
手動のスイッチ手段を設ける構成とした。これにより、
たとえば、最終段の異常電気信号検出手段では異常が検
出されず、かつ直前の異常電気信号検出手段では異常が
検出された場合に、「異常」と判断せず、「メンテナン
ス等のためにスイッチ手段がOPENになっている」と
判断することができるため、このスイッチ手段を再びC
LOSEすることで、電源を遮断することなく異常停止
状態を正常状態に復旧させることができる、という効果
を奏する。
According to the next invention, the normal-time CLOSE manual switch means is provided in series with the abnormal electric signal detection means immediately before the last stage. This allows
For example, when no abnormality is detected by the abnormal electric signal detecting means at the last stage and abnormal is detected by the immediately preceding abnormal electric signal detecting means, the abnormality is not determined, and the switching means is not determined for maintenance or the like. Is OPEN. "
By performing the LOSE, it is possible to restore the abnormal stop state to the normal state without shutting down the power supply.

【0040】つぎの発明によれば、全速固定手段と圧縮
機運転/停止スイッチ手段を備える構成としたため、制
御回路の不良等の発生時に、マイコン制御が停止された
場合においても、停止された機能を駆動しての応急運転
が可能となる、という効果を奏する。また、応急運転時
においても、機能を最小限に絞ることで冗長回路を極力
少なくする構成としたため、さらなる小型化を実現でき
る、という効果を奏する。
According to the next aspect of the present invention, since the system is provided with the all-speed fixing means and the compressor operation / stop switch means, even when the microcomputer control is stopped when a control circuit failure occurs, the stopped function is provided. It is possible to perform an emergency operation by driving the vehicle. In addition, even during an emergency operation, since the configuration is such that the number of redundant circuits is reduced as much as possible by minimizing the functions, further downsizing can be achieved.

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

【図1】 本発明にかかる冷凍装置の構成を示す図であ
る。
FIG. 1 is a diagram showing a configuration of a refrigeration apparatus according to the present invention.

【図2】 冷凍装置の制御アルゴリズムを示す図であ
る。
FIG. 2 is a diagram illustrating a control algorithm of the refrigeration apparatus.

【図3】 異常判別表を示す図である。FIG. 3 is a diagram showing an abnormality determination table.

【図4】 従来の冷凍装置の構成を示す図である。FIG. 4 is a diagram showing a configuration of a conventional refrigeration apparatus.

【符号の説明】[Explanation of symbols]

1 3相電源、2,3 モータ、4 電磁接触器(駆動
コイル)、5 圧縮機制御スイッチ、10 圧縮機、1
1 凝縮器、12 絞り部、13 蒸発器、20 ゼロ
クロス信号検出部、21 運転停止スイッチ、22a
高圧圧力異常検知部、22b 熱検知過電流異常検知
部、22c 高圧吐出温度異常検知部、23a,23
b,23c 電源半波信号検出部、24 スイッチ、2
5 ファン風量制御部、26 全開固定部、27 圧力
開閉部、28 マイコン、29 低圧圧力検出部。
1 Three-phase power supply, 2, 3 motor, 4 electromagnetic contactor (drive coil), 5 compressor control switch, 10 compressor, 1
DESCRIPTION OF SYMBOLS 1 Condenser, 12 Throttle part, 13 Evaporator, 20 Zero cross signal detection part, 21 Operation stop switch, 22a
High pressure abnormality detection unit, 22b Heat detection overcurrent abnormality detection unit, 22c High pressure discharge temperature abnormality detection unit, 23a, 23
b, 23c power supply half-wave signal detector, 24 switches, 2
5 Fan air volume control unit, 26 Fully open fixed unit, 27 Pressure switch unit, 28 Microcomputer, 29 Low pressure detection unit.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 山下 哲也 東京都千代田区丸の内二丁目2番3号 三 菱電機株式会社内 (72)発明者 佐多 裕士 東京都千代田区丸の内二丁目2番3号 三 菱電機株式会社内 Fターム(参考) 5H740 AA08 BA03 BB01 BB09 BB10 BC01 BC04 JA28 MM01  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Yamashita 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Hiroshi Sata 2-3-2 Marunouchi, Chiyoda-ku, Tokyo 3 Rishi Electric Co., Ltd. F term (reference) 5H740 AA08 BA03 BB01 BB09 BB10 BC01 BC04 JA28 MM01

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 圧縮機と凝縮器と絞り手段と蒸発器とを
冷媒配管で連通した冷凍装置において、 3相電源の相間でゼロクロス信号を出力するゼロクロス
信号検出手段と、 前記相間とは異なる相間に設けられ、後続の回路の電源
をON/OFFする運転/停止スイッチ手段と、 前記運転/停止スイッチ手段の2次側に設けられ、運転
状態の各種異常を検知する複数の異常検知手段と、 前記各異常検知手段の2次側に個別に設けられ、異常を
電気信号として出力する異常電気信号検出手段と、 前記圧縮機を運転/停止させる圧縮機運転/停止手段
と、 前記凝縮器に対するファンの風量を調整するファン風量
調整手段と、 低圧圧力検出値に基づく前記圧縮機運転/停止手段の制
御、前記ファン風量調整手段の制御、ゼロクロス信号周
期に基づく電源周波数判定および瞬時停電判定、ゼロク
ロス信号と異常電気信号に基づく電源逆相状態判定、異
常電気信号に基づく異常状態および運転スイッチ操作判
定、を実行する制御手段と、 を備えることを特徴とする冷凍装置。
1. A refrigeration system in which a compressor, a condenser, a throttling means, and an evaporator are connected by a refrigerant pipe, wherein: a zero cross signal detecting means for outputting a zero cross signal between phases of a three-phase power supply; Operating / stop switch means for turning on / off the power supply of a subsequent circuit; and a plurality of abnormality detecting means provided on the secondary side of the operation / stop switch means for detecting various abnormalities in the operating state; An abnormal electric signal detecting means which is individually provided on the secondary side of each of the abnormal detecting means and outputs an abnormality as an electric signal; a compressor operating / stop means for operating / stopping the compressor; and a fan for the condenser. Means for adjusting the air flow of the compressor, control of the compressor operating / stopping means based on the detected low-pressure pressure value, control of the means for adjusting the air flow of the fan, and a cycle of the zero-cross signal. Control means for executing a source frequency judgment and an instantaneous power outage judgment, a power supply reverse phase judgment based on a zero cross signal and an abnormal electric signal, and an abnormal state and an operation switch operation judgment based on the abnormal electric signal. apparatus.
【請求項2】 前記制御手段は、 前記瞬時停電判定、前記異常状態および運転スイッチ操
作の判定、の順に判定処理を行い、瞬時停電(瞬停)時
には、異常状態および運転スイッチ操作の判定を実施し
ないことを特徴とする請求項1に記載の冷凍装置。
2. The control means performs a determination process in the order of the instantaneous power outage determination, the abnormal state and the operation switch operation determination, and performs an abnormal state and an operation switch operation determination in an instantaneous power outage (instantaneous power outage). The refrigeration apparatus according to claim 1, wherein the refrigeration apparatus is not used.
【請求項3】 前記異常検知手段は、高圧圧力異常検知
手段、熱検知過電流異常検知手段、および高圧吐出温度
異常検知手段で構成され、 各異常検知手段を、異常状態からの復帰が早い順に直列
に配置することを特徴とする請求項1または2に記載の
冷凍装置。
3. The abnormality detection means comprises high-pressure abnormality detection means, heat-detection overcurrent abnormality detection means, and high-pressure discharge temperature abnormality detection means. The refrigeration apparatus according to claim 1, wherein the refrigeration apparatuses are arranged in series.
【請求項4】 最後段の異常電気信号検出手段の直前の
異常電気信号検出手段と、当該異常電気信号検出手段に
対応する異常検知手段と、の間に、通常時CLOSEの
手動のスイッチ手段を設け、 前記直前の異常電気信号検出手段だけから異常が検出さ
れた場合、前記スイッチ手段を「CLOSE→OPEN
→CLOSE」の順に操作することで異常状態がリセッ
トされることを特徴とする請求項1、2または3に記載
の冷凍装置。
4. A manual switch for normal CLOSE is provided between the abnormal electric signal detecting means immediately before the last abnormal electric signal detecting means and the abnormal detecting means corresponding to the abnormal electric signal detecting means. When an abnormality is detected only from the immediately preceding abnormal electric signal detecting means, the switch means is switched from "CLOSE to OPEN".
4. The refrigeration apparatus according to claim 1, wherein the abnormal state is reset by operating in the order of "→ CLOSE".
【請求項5】 前記制御手段が前記ファン風量調整手段
の動作を停止させた場合においても、ファンを全速運転
で動作させる全速固定手段と、 前記制御手段が前記圧縮機を停止させるように前記圧縮
機運転/停止手段を制御した場合においても、前記圧縮
機を動作させる圧縮機運転/停止スイッチ手段と、 を備え、 異常発生に伴って前記制御手段が停止された場合におい
ても、停止された機能を駆動し、応急運転を開始するこ
とを特徴とする請求項1〜4のいずれか一つに記載の冷
凍装置。
5. A full-speed fixing means for operating a fan at full-speed operation even when the control means stops the operation of the fan air volume adjusting means, and the compression means so that the control means stops the compressor. A compressor operation / stop switch means for operating the compressor even when the compressor operation / stop means is controlled, and a function stopped even when the control means is stopped due to an abnormality. The refrigerating apparatus according to any one of claims 1 to 4, wherein the refrigerating apparatus is driven to start an emergency operation.
JP2000345761A 2000-11-13 2000-11-13 Refrigeration equipment Expired - Lifetime JP4376446B2 (en)

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Application Number Priority Date Filing Date Title
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JP2002147906A true JP2002147906A (en) 2002-05-22
JP4376446B2 JP4376446B2 (en) 2009-12-02

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Country Status (1)

Country Link
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Publication number Priority date Publication date Assignee Title
JP2007212106A (en) * 2006-02-13 2007-08-23 Orion Mach Co Ltd Cooling device
JP2007303818A (en) * 2001-04-20 2007-11-22 York Internatl Corp Method and device for controlling removal of heat from condenser in cooling system
CN100454202C (en) * 2006-08-21 2009-01-21 浙江大学 Multifunctionl controller for adjusting speed and light
CN107655142A (en) * 2017-09-13 2018-02-02 珠海格力电器股份有限公司 Emergency control device and method for air conditioning unit

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CN102840705B (en) * 2012-09-10 2014-11-12 中国科学院理化技术研究所 Deep cooling mixed working medium throttling refrigeration system
CN103954095B (en) * 2014-05-23 2015-11-11 湖北东贝新能源有限公司 A kind of full intelligent frequency conversion refrigerator control method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007303818A (en) * 2001-04-20 2007-11-22 York Internatl Corp Method and device for controlling removal of heat from condenser in cooling system
JP2007212106A (en) * 2006-02-13 2007-08-23 Orion Mach Co Ltd Cooling device
JP4601561B2 (en) * 2006-02-13 2010-12-22 オリオン機械株式会社 Cooling system
CN100454202C (en) * 2006-08-21 2009-01-21 浙江大学 Multifunctionl controller for adjusting speed and light
CN107655142A (en) * 2017-09-13 2018-02-02 珠海格力电器股份有限公司 Emergency control device and method for air conditioning unit

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