JPH02247472A - Operation controller for freezing device - Google Patents
Operation controller for freezing deviceInfo
- Publication number
- JPH02247472A JPH02247472A JP6956989A JP6956989A JPH02247472A JP H02247472 A JPH02247472 A JP H02247472A JP 6956989 A JP6956989 A JP 6956989A JP 6956989 A JP6956989 A JP 6956989A JP H02247472 A JPH02247472 A JP H02247472A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- expansion valve
- detection means
- evaporator
- refrigerant temperature
- 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
Links
- 230000008014 freezing Effects 0.000 title claims abstract description 17
- 238000007710 freezing Methods 0.000 title claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims abstract description 137
- 230000005856 abnormality Effects 0.000 claims abstract description 58
- 230000002159 abnormal effect Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 83
- 238000005057 refrigeration Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/30—Quick freezing
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、冷凍装置、ことにコンテナ用冷凍装置の運転
制御に関し、特に、冷媒温度センサ異常時の膨張弁の開
度制御対策に係るものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the operation control of a refrigeration system, especially a container refrigeration system, and particularly relates to a measure for controlling the opening of an expansion valve when a refrigerant temperature sensor is abnormal. It is.
（従来の技術）
従来より、この種の冷凍装置の運転制御装置としては、
庫内温度を設定値に保持するために、例えば、特開昭５
８−２０５０５７号公報に開示されるように、容量の：
Ａ整可能な圧縮機、凝縮器、開度の調整可能な膨張弁、
蒸発器を順に接続して冷媒循環回路を構成すると共に、
蒸発器の蒸発温度センサと出口側冷媒温度センサとを設
け、該両センサの検出信号により過熱度が所定値になる
ように膨張弁の開度を制御している。(Prior art) Conventionally, as an operation control device for this type of refrigeration equipment,
In order to maintain the internal temperature at the set value, for example,
As disclosed in Publication No. 8-205057, the capacity is:
A adjustable compressor, condenser, expansion valve with adjustable opening,
The evaporators are connected in sequence to form a refrigerant circulation circuit, and
An evaporation temperature sensor and an outlet-side refrigerant temperature sensor are provided for the evaporator, and the opening degree of the expansion valve is controlled based on detection signals from both sensors so that the degree of superheat reaches a predetermined value.
（発明が解決しようとする課題）
しかしながら、上記従来のものでは、冷媒温度センサに
断線、短絡等の異常があった場合に対して何らのバック
アップ手段が備えられていなかった。従って、該センサ
に異常があった場合には、冷凍装置自体が様々の使用条
件、庫内熱負荷容量の変動の下で運転されているため、
適切な膨張弁の開度制御を行うことができず、ひいては
冷凍装置自体を正確に運転することが難しいという問題
があった。(Problems to be Solved by the Invention) However, the above-mentioned conventional device is not equipped with any backup means in case the refrigerant temperature sensor has an abnormality such as disconnection or short circuit. Therefore, if there is an abnormality in the sensor, since the refrigeration equipment itself is operated under various usage conditions and fluctuations in internal heat load capacity,
There was a problem in that it was not possible to appropriately control the opening of the expansion valve, and that it was difficult to operate the refrigeration system itself accurately.
特に、冷凍コンテナに設けられる冷凍装置においては、
庫内物品の氷結、脱水、腐敗等に直結するだけに重大で
あり、適切なバックアップ手段が望まれていた。In particular, in refrigeration equipment installed in refrigerated containers,
This is serious because it directly leads to freezing, dehydration, spoilage, etc. of the items in the warehouse, and an appropriate backup method has been desired.
本発明は、斯かる点に鑑みてなされたものであり、蒸発
器出入口の冷媒温度検出手段の異常特に、蒸発器の吸込
側或いは吹出側の空気温度又は正常な冷媒温度検出手段
の冷媒温度に基づいて膨張弁の開度制御を行うことによ
り、上記課題を解決することを目的としている。The present invention has been made in view of the above, and is designed to detect abnormalities in the refrigerant temperature detection means at the inlet and outlet of the evaporator, particularly the air temperature on the suction side or outlet side of the evaporator, or the refrigerant temperature detected by the normal refrigerant temperature detection means. The purpose of the present invention is to solve the above problem by controlling the opening degree of the expansion valve based on the above-described method.
（課題を解決するための手段）
上記課題を解決するために、請求項（１）に係る発明が
講じた手段は、第１図に示すように、先ず、圧縮機（１
）、凝縮器（３）、開度の調整可能な膨張弁（５）及び
蒸発器（６）を直列に閉回路に接続してなる冷媒循環回
路（８）を備えた冷凍装置を前提としている。そして、
上記蒸発器（６）の入口側冷媒温度を検出する入口側冷
媒温度検出手段（Ｔｈ１）と、上記蒸発器（６）の出口
側冷媒温度で検出する出口側冷媒温度検出手段（Ｔｈ２
）と、上記両冷媒温度検出手段（Ｔｈ１）。(Means for Solving the Problems) In order to solve the above problems, the means taken by the invention according to claim (1) are as shown in FIG.
), a condenser (3), an expansion valve (5) with adjustable opening, and an evaporator (6) connected in series in a closed circuit to form a refrigerant circulation circuit (8). . and,
An inlet side refrigerant temperature detection means (Th1) detects the inlet side refrigerant temperature of the evaporator (6), and an outlet side refrigerant temperature detection means (Th2) that detects the outlet side refrigerant temperature of the evaporator (6).
), and both refrigerant temperature detection means (Th1).
（Ｔｈ２）から出力を受け、出口側冷媒温度と入口側冷
媒温度との温度差が一定になるように上記膨張弁（５）
の開度を制御する膨張弁制御手段（１２）と、上記冷媒
温度検出手段（Ｔｈ１）。(Th2), and the expansion valve (5)
expansion valve control means (12) for controlling the opening degree of the refrigerant temperature detection means (Th1).
（Ｔｈ２）の少なくとも一方の異常を検出する異常検出
手段（１６）と所望の庫内温度を設定する設定手段（２
２）と、上記蒸発器（６）の吹出空気温度を検出する吹
出空気温度検出手段（Ｔｈ４）と、上記設定手段（２２
）により庫内設定温度が所定値以上の範囲内に設定され
た急速冷凍運転時において、上記異常検出手段（１６）
が異常信号を出力すると、上記膨張弁制御手段（１２）
による膨張弁（５）の開度制御を庫内設定温度と蒸発器
（６）の吹出温度との温度差に基づく制御に変更する制
御変更手段（１７１）とを備えた構成としている。An abnormality detection means (16) for detecting an abnormality in at least one of (Th2) and a setting means (2) for setting a desired internal temperature.
2), a blowing air temperature detecting means (Th4) for detecting the blowing air temperature of the evaporator (6), and the setting means (22).
), the above-mentioned abnormality detection means (16)
outputs an abnormal signal, the expansion valve control means (12)
The configuration includes a control changing means (171) for changing the opening degree control of the expansion valve (5) to control based on the temperature difference between the internal set temperature and the outlet temperature of the evaporator (6).
また、請求項（２）に係る発明がＪｌじた手段は、請求
項（１）の吹出温度検出手段（Ｔｈ３）及び制御変更手
段（１７１）に代えて、上記蒸発器（６）の吸込空気温
度を検出する吸込温度検出手段（Ｔｈ４）と、上記設定
手段（２２）により庫内設定温度が所定値未満の範囲内
に設定された急速冷凍運転時において、上記異常検出手
段（１６）が異常信号を出力すると、上記膨張弁制御手
段（１２）による膨張弁（５）の開度制御を庫内設定温
度と蒸発器（６）の吸込空気温度との温度差に基づく制
御に変更する制御変更手段（１７２）とを備えた構成と
している。In addition, the invention according to claim (2) provides a means for controlling the intake air of the evaporator (6) in place of the blowout temperature detecting means (Th3) and the control changing means (171) of claim (1). During the quick freezing operation in which the preset internal temperature is set within a range below a predetermined value by the suction temperature detection means (Th4) that detects the temperature and the setting means (22), the abnormality detection means (16) detects an abnormality. When the signal is output, the control is changed to change the opening degree control of the expansion valve (5) by the expansion valve control means (12) to control based on the temperature difference between the set temperature inside the refrigerator and the intake air temperature of the evaporator (6). The configuration includes means (172).
また、請求項（３）に係る発明が講じた手段は、請求項
（１）の吹出温度検出手段（Ｔ ｈ ３）及び制御変更
手段（１７１）に代えて、設定手段（２２）によって設
定された庫内設定温度に基づいて蒸発器（６）の出口側
冷媒温度を算出する算出手段（２７１）と、庫内温度が
設定温度に対して所定幅をもった所定温度範囲内にある
冷凍運転時において、上記異常検出手段（１６）が異常
信号を出力すると、上記膨張弁制御手段（１１２）によ
る膨張弁（５）の制御を上記出口側冷媒温度検出手段（
Ｔｈ２）の冷媒温度と上記算出手段（２７１）の算出温
度に基づく制御に変更する制御変更手段（１７３）とを
備えた構成としている。Moreover, the means taken by the invention according to claim (3) is set by the setting means (22) instead of the blowout temperature detection means (T h 3) and the control change means (171) of claim (1). calculation means (271) for calculating the refrigerant temperature at the exit side of the evaporator (6) based on the preset temperature inside the refrigerator; At times, when the abnormality detection means (16) outputs an abnormality signal, the expansion valve control means (112) controls the expansion valve (5) by the outlet side refrigerant temperature detection means (
The refrigerant temperature Th2) is configured to include control changing means (173) for changing the control to control based on the refrigerant temperature of Th2) and the temperature calculated by the calculating means (271).
また、請求項（４）に係る発明が講じた手段は、請求項
（３）の制御変更手段（１７３）に代えて、庫内温度が
設定温度に対して所定幅をもった所定温度範囲内にある
冷凍運転時において、上記異常検出手段（１６）が異常
信号を出力すると、上記膨張弁制御手段（１２）による
膨張弁（５）の制御を上記入口側冷媒温度検出手段（Ｔ
ｈ１）の冷媒温度と上記算出手段（２７１）の算出温度
に基づく制御に変更する制御変更手段（１７４）とを備
えた構成としている。In addition, the means taken by the invention according to claim (4) is such that, instead of the control changing means (173) of claim (3), the temperature inside the refrigerator is within a predetermined temperature range having a predetermined width with respect to the set temperature. During the refrigeration operation, when the abnormality detection means (16) outputs an abnormality signal, the control of the expansion valve (5) by the expansion valve control means (12) is changed to the inlet side refrigerant temperature detection means (T
The refrigerant temperature h1) is configured to include control changing means (174) for changing the control to control based on the refrigerant temperature of h1) and the temperature calculated by the calculating means (271).
また、請求項（５）に係る発明が講じた手段は、請求項
（１）〜（４）の各１；り御変更手段（１７１）、（１
７４）が設けられた構成としている。In addition, the means taken by the invention according to claim (5) include each of claims (1) to (4);
74).
（作用）
上記構成により、請求項（１）に係る発明では冷媒温度
検出手段（Ｔｈ１）、 （Ｔｈ２）の正常時において
は、膨張弁（５）は蒸発器（６）の出入口における冷媒
温度差に基づいて該温度差が一定になるように開度＠御
される。そして、庫内の急速冷凍運転時でかつ庫内設定
温度が所定温度、例えば、−５℃以上で２５℃以下の時
に、蒸発器（６）の出口側及び入口側冷媒温度検出手段
（Ｔｈ２）。(Function) With the above configuration, in the invention according to claim (1), when the refrigerant temperature detection means (Th1) and (Th2) are normal, the expansion valve (5) is configured to detect the refrigerant temperature difference at the entrance and exit of the evaporator (6). The opening degree is controlled based on the temperature difference to be constant. Then, during the quick freezing operation in the refrigerator and when the preset temperature in the refrigerator is a predetermined temperature, for example, -5°C or higher and 25°C or lower, the outlet side and inlet side refrigerant temperature detection means (Th2) of the evaporator (6) .
（ＴＨＩ）の少くとも一方に異常が生じた場合には、異
常検出手段（１６）からの異常信号により、制御変更手
段（１７１）が、膨張弁制御手段（１２）の制御を変更
し、膨張弁（５）の開度制御を庫内設定温度と蒸発器（
６）の吹出空気温度とに基づいて制御する。(THI), the control change means (171) changes the control of the expansion valve control means (12) in response to an abnormality signal from the abnormality detection means (16), and expands. The opening degree of the valve (5) is controlled based on the set temperature inside the refrigerator and the evaporator (
Control is performed based on the blown air temperature of 6).
また、請求項（２）に係る発明では、庫内急速冷凍運転
でかつ庫内設定温度が例えば、−５℃より低温の時に、
蒸発器（６）の出口側及び入口側冷媒温度検出手段（Ｔ
ｈ２）、（ＴＨＩ）の少くとも一方に異常が生じた場合
には、異常検出手段（１６）からの信号により、制御変
更手段（１７２）が、膨張弁制御手段（１２）の制御を
変更し、膨張弁（５）の開度制御を庫内設定温度と蒸発
器（６）の吸込空気温度とに基づいて制御する。Further, in the invention according to claim (2), when the internal quick freezing operation is performed and the internal preset temperature is lower than -5°C, for example,
Refrigerant temperature detection means (T
h2), (THI), the control change means (172) changes the control of the expansion valve control means (12) in response to a signal from the abnormality detection means (16). , the opening degree of the expansion valve (5) is controlled based on the set internal temperature and the intake air temperature of the evaporator (6).
また、請求項（３）に係る発明では、庫内温度が設定温
度範囲内にある時に、蒸発器（６）の入口側の冷媒温度
検出手段（ＴＨＩ）に異常が生じた場合には、異常検出
手段（１６）からの信号により、制御変更手段（１７３
）が、膨張弁制御手段（１２）の制御を変更し、膨張弁
（５）の開度制御を庫内設定温度に基づく入口側冷媒温
度により制御する。Further, in the invention according to claim (3), when an abnormality occurs in the refrigerant temperature detection means (THI) on the inlet side of the evaporator (6) when the internal temperature is within the set temperature range, the abnormality is detected. The control change means (173) is activated by the signal from the detection means (16).
) changes the control of the expansion valve control means (12) and controls the opening degree of the expansion valve (5) based on the inlet side refrigerant temperature based on the set temperature in the refrigerator.
また、請求項（４）に係る発明では、庫内設定温度が設
定温度範囲内にある時に、蒸発器（６）の出口側の冷媒
温度検出手段（ＴＨ２）に異常が生じた場合には、異常
検出手段（１６）からの信号により、制御変更手段（１
７４）が、膨張弁制御手段（１２）の制御を変更し、膨
張弁（５）の開度制御を庫内設定温度に基づく出口側冷
媒温度により制御する。Further, in the invention according to claim (4), when an abnormality occurs in the refrigerant temperature detection means (TH2) on the outlet side of the evaporator (6) when the set temperature in the refrigerator is within the set temperature range, The control change means (1) is activated by the signal from the abnormality detection means (16).
74) changes the control of the expansion valve control means (12), and controls the opening degree of the expansion valve (5) based on the outlet side refrigerant temperature based on the set internal temperature.
また、請求項（５）に係る発明では、上記請求項（１）
から（４）に係る発明の各制御変更手段’ （１７１）
〜（１７４）の作用が行われる。In addition, in the invention according to claim (5), the above claim (1)
Each control changing means of the invention according to (4)' (171)
-(174) are performed.
以上の作用により、本発明においては、蒸発器出入口の
冷媒温度検出手段（Ｔｈ１）、（Ｔｈ２）の異常時にお
いても、庫内急速冷凍運転時、庫内温度が設定温度範囲
内にある時を問わず、適切な膨張弁の開度制御がなされ
る。Due to the above-described effects, in the present invention, even when the refrigerant temperature detection means (Th1) and (Th2) at the evaporator inlet and outlet are abnormal, it is possible to detect when the internal temperature is within the set temperature range during the internal quick freezing operation. Regardless, the opening degree of the expansion valve is appropriately controlled.
（実施例） 以下、本発明の実施例を図面に沿って詳細に説明する。(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.
第２図に示すように、（Ａ）は冷凍コンテナ等に設けら
れる冷凍装置、（１）は容量を３３％と６７％と１００
％とに３段に変更可能なアンロード付き圧縮機、（３）
は空冷ファン（Ｆ１）及びモータ（ＭＦＩ）が付設され
た凝縮器、（４）はレシーバ、（５）はＰＩＤ制御され
る電子膨張弁、（６）は庫内ファン（Ｆ２）及びモータ
（ＭＦ２）が付設せられた蒸発器、（７）はアキュムレ
ータであり、各機器（１）、 （３）、 （４）、
（５）。As shown in Figure 2, (A) is a refrigeration system installed in a refrigerated container, etc., and (1) is a refrigeration system with a capacity of 33%, 67%, and 100%.
Compressor with unloading that can be changed to 3 stages (3)
is a condenser with an air cooling fan (F1) and motor (MFI), (4) is a receiver, (5) is a PID-controlled electronic expansion valve, and (6) is an internal fan (F2) and motor (MF2). ) is attached to the evaporator, (7) is an accumulator, and each device (1), (3), (4),
(5).
（６）、（７）は上述の順に冷媒配管により直列に接続
されて、冷媒循環回路（８）を形成しており、冷媒を圧
縮機（１）により上記冷媒循環回路（８）を流通循環さ
せることにより、凝縮器（３）にて冷媒ガスの有する熱
を庫外に放出して冷媒ガスを液化し、蒸発器（６）にて
冷媒ガスが気化することにより庫内熱を吸収し、もって
庫内を冷凍するように構成されている。(6) and (7) are connected in series through refrigerant piping in the above-mentioned order to form a refrigerant circulation circuit (8), and the refrigerant is circulated through the refrigerant circulation circuit (8) by the compressor (1). By doing so, the condenser (3) releases the heat of the refrigerant gas outside the refrigerator to liquefy the refrigerant gas, and the evaporator (6) absorbs the heat inside the refrigerator by vaporizing the refrigerant gas. It is configured to freeze the inside of the refrigerator.
また、（２）は上記圧縮機（１）と凝縮器（３）との間
に介設された三方比例弁であり、（９）は一端が該三方
比例弁（２）に接続され、他端が上記凝縮器（３）、レ
シーバ（４）及び電子膨張弁（５）をバイパスして蒸発
器（６）の吸入側冷媒配管（１０）に接続せられたホッ
トガスバイパスラインで、該ホットガスバイパスライン
（９）はドレンパンヒータ部（１１）を備えている。ま
た、（ＨＰＳ）は高圧用圧力センサ、（Ｔｈ１）及び（
Ｔｈ２）は蒸発器（６）の入口冷媒温度及び出口冷媒温
度を検出する冷媒温度検出手段である冷媒温度センサで
あり、（Ｔｈ３）及び（Ｔｈ４）は上記蒸発器（６）の
吸込空気温度及び吹出空気温度（庫内温度）を検１１す
る庫内温度検出手段である空気温度センサである。Further, (2) is a three-way proportional valve interposed between the compressor (1) and the condenser (3), and (9) has one end connected to the three-way proportional valve (2) and the other end. A hot gas bypass line whose end is connected to the suction side refrigerant pipe (10) of the evaporator (6) bypassing the condenser (3), receiver (4) and electronic expansion valve (5), The gas bypass line (9) includes a drain pan heater section (11). In addition, (HPS) is a pressure sensor for high pressure, (Th1) and (
Th2) is a refrigerant temperature sensor which is a refrigerant temperature detection means for detecting the inlet refrigerant temperature and outlet refrigerant temperature of the evaporator (6), and (Th3) and (Th4) are the refrigerant temperature sensors that detect the inlet air temperature and outlet refrigerant temperature of the evaporator (6). This is an air temperature sensor which is an internal temperature detection means for detecting the temperature of the blown air (temperature inside the refrigerator).
そして、上記各温度センサ（Ｔｈ１）、 （Ｔｈ２）
、（Ｔｈ３）、（Ｔｈ４）の検出信号は、コントローラ
（２１）に入力されるように構成されており、該コント
ローラ（２１）には、第３図に示すようにＡ／Ｄ変換器
（２３）と、Ｉ１０ポート（２４）と、ＲＡＭ （２５
）と、ＲＯＭ （２６）と、ＣＰＵ （２７）とが備え
られている。更に、上記電子膨張弁（５）のモータ（Ｍ
ＥＶ）を冷凍運転時に各冷媒温度センサ（Ｔｈ１）、
（Ｔｈ２３）からの信号に基づいて出口側冷媒温度と
入口側冷媒温度との温度差が一定になるようにＰＩＤ制
御することにより開度制御を行う一方、冷蔵運転時に蒸
発器（６）の吹出側の空気温度センサ（Ｔｈ４）の検知
信号により吹出空気温度が設定値になるようにＰＩＤ制
御して開度制御を行う膨張弁制御手段（１２）と、デフ
ロスト運転時に三方比例弁（２）のモータ（ＭＶ）を制
御してホットガスバイパスライン（９）を流れるホット
ガス量を調整するホットガス制御手段（１３）と、圧縮
機（１）の容量を制御する容量制御手段（１４）と、庫
内温度設定器（２２）より入力された所望の庫内設定温
度とが備えられている。And each of the above temperature sensors (Th1), (Th2)
, (Th3), and (Th4) are configured to be input to a controller (21), and the controller (21) includes an A/D converter (23) as shown in FIG. ), I10 port (24), RAM (25
), a ROM (26), and a CPU (27). Furthermore, the motor (M
Each refrigerant temperature sensor (Th1) when the EV) is in refrigeration operation,
Based on the signal from (Th23), the opening is controlled by PID control so that the temperature difference between the outlet side refrigerant temperature and the inlet side refrigerant temperature is constant, while the blowout of the evaporator (6) is performed during refrigeration operation. An expansion valve control means (12) performs PID control to control the opening so that the outlet air temperature reaches a set value based on the detection signal of the side air temperature sensor (Th4), and a three-way proportional valve (2) during defrost operation. Hot gas control means (13) that controls the motor (MV) to adjust the amount of hot gas flowing through the hot gas bypass line (9); Capacity control means (14) that controls the capacity of the compressor (1); A desired internal temperature setting inputted from an internal temperature setting device (22) is provided.
更に、（１６）は冷媒温度センサ（Ｔｈ１）。Furthermore, (16) is a refrigerant temperature sensor (Th1).
（Ｔｈ２）の異常を検出する異常検出手段、（１７）は
膨張弁制御手段（１２）に制御手段であり、請求項（１
）〜（４）に係る第１〜第４制御変更手段（１７１）〜
（１７４）がコントローラ（２１）に組み込まれると共
に、庫内設定温度に基づいて蒸発器（６）の入口側冷媒
温度と出口側冷媒温度とを算出する算出手段（２７１）
がコントローラ（２１）に備えられている。(Th2) is an abnormality detection means for detecting an abnormality; (17) is a control means for the expansion valve control means (12);
) to first to fourth control changing means (171) according to (4)
(174) is incorporated in the controller (21), and a calculation means (271) calculates the inlet-side refrigerant temperature and outlet-side refrigerant temperature of the evaporator (6) based on the set internal temperature.
is provided in the controller (21).
上記第１制御変更手段（１７１）は、上記設定器（２２
）により庫内設定温度が所定値以上の範囲内に設定され
た急速冷凍運転時において、上記異常検出手段（１６）
が異常信号を出力すると、上記膨張弁制御手段（１２）
による膨張弁（５）の開度制御を庫内設定温度と蒸発器
（６）の吹出空気温度との温度差に基づく制御に変更す
るよう構成され、また、第２制御変更手段（１７２）は
上記設定器（２２）により庫内設定温度が所定値未満の
範囲内に設定された急速冷凍運転時において、上記異常
検出手段（１６）が異常信号を出力すると、上記膨張弁
制御手段（１２）による膨張弁（５）の開度制御を庫内
設定温度と蒸発器（６）の吹出温度との温度差に話づく
制御に変更するよう構成されている。The first control changing means (171) includes the setting device (22).
), the above-mentioned abnormality detection means (16)
outputs an abnormal signal, the expansion valve control means (12)
The second control changing means (172) is configured to change the opening degree control of the expansion valve (5) to control based on the temperature difference between the internal set temperature and the temperature of the air blown from the evaporator (6). When the abnormality detection means (16) outputs an abnormality signal during the quick freezing operation in which the set temperature in the refrigerator is set within a range below a predetermined value by the setting device (22), the expansion valve control means (12) The opening degree control of the expansion valve (5) is changed to control based on the temperature difference between the set internal temperature and the outlet temperature of the evaporator (6).
また、上記第３制御変更手段（１７３）は庫内温度が設
定温度に対して所定幅をもった所定温度範囲内にある冷
凍運転時において、上記異常検出手段（１６）が入口側
冷媒温度センサ（Ｔｂ１）の異常信号を出力すると、上
記膨張弁制御手段（１２）による膨張弁（５）の開度制
御を上記出口側冷媒温度検出手段（Ｔｈ２）の冷媒温度
と上記算出手段（２７１）の算出温度に基づく制御に変
更するように構成され、また、第４制御変更手段（１７
４）は、庫内温度が設定温度に対して所定幅をもった所
定温度範囲内にある冷凍運転時において、上記異常検出
手段（１６）が出口側冷媒温度センサ（Ｔｈ２）の異常
信号を出力すると、上記膨張弁制御手段（１２）による
膨張弁（５）の制御を上記入口側冷媒温度検出手段（Ｔ
ｈ１）の冷媒温度と上記算出手段（２７１）の算出温度
に基づく制御に変更するように構成されている。Further, the third control change means (173) is configured such that the abnormality detection means (16) detects the inlet side refrigerant temperature sensor during the refrigeration operation when the temperature inside the refrigerator is within a predetermined temperature range having a predetermined width with respect to the set temperature. When the abnormal signal (Tb1) is output, the opening degree control of the expansion valve (5) by the expansion valve control means (12) is adjusted to the refrigerant temperature of the outlet side refrigerant temperature detection means (Th2) and the calculation means (271). The fourth control changing means (17
4) The abnormality detection means (16) outputs an abnormality signal from the outlet side refrigerant temperature sensor (Th2) during refrigeration operation when the internal temperature is within a predetermined temperature range with a predetermined width with respect to the set temperature. Then, the control of the expansion valve (5) by the expansion valve control means (12) is controlled by the inlet side refrigerant temperature detection means (T
h1) and the temperature calculated by the calculation means (271).
更にまた、第３において、（Ｔｒ）は変換器、（Ｓ）は
運転／停止スイッチ、（３１）は高圧圧力開閉器、（３
２）は低圧圧力開閉器、（３３）は油圧保護圧力開閉器
、（３４）はランプスイッチ、（３５）は油圧リセット
スイッチ、（３６）は圧縮機保護サーモスイッチ、（３
７）は変圧器（Ｔｒ）の結線切換用、（３８）は電圧切
換用、（３９）、 （４０）は圧縮機モーフ用のそれ
ぞれ手動切換開閉器であり、該各間閉器（３７）〜（４
０）は全て連動している。Furthermore, in the third, (Tr) is a converter, (S) is a run/stop switch, (31) is a high pressure switch, (3
2) is a low pressure switch, (33) is a hydraulic protection pressure switch, (34) is a lamp switch, (35) is a hydraulic reset switch, (36) is a compressor protection thermoswitch, (3)
7) is a manual switching switch for connecting the transformer (Tr), (38) is for voltage switching, and (39) and (40) are manual switching switches for the compressor morph. ~(4
0) are all linked.
（ＭＣ）は圧縮機モータ、（ＩＯＣ）は、上記圧縮機モ
ータ（ＭＣ）を作動させると同時に凝縮器（３）の送風
ファンモータ（ＭＦ１）への通電を許容する常開接点（
１０Ｃ−１）を有する圧縮機リレー （ＩＯＦ）は蒸発
器（５）の送風ファンモータ（ＭＦ２）を作動させる常
開接点（１０Ｆ−１）を有する蒸発器ファンリレー （
２０Ｓ−１）は冷媒配管の冷媒流れを許容又は阻止する
電磁弁のリレーである。(MC) is a compressor motor, and (IOC) is a normally open contact (IOC) that operates the compressor motor (MC) and at the same time allows the blower fan motor (MF1) of the condenser (3) to be energized.
The compressor relay (IOF) with a normally open contact (10F-1) operates the blower fan motor (MF2) of the evaporator (5).
20S-1) is a solenoid valve relay that allows or blocks the flow of refrigerant in the refrigerant pipe.
次に、第４図の制御フローに基づき、請求項（１）及び
（２）に係る発明の制御動作について説明する。Next, the control operation of the invention according to claims (1) and (2) will be explained based on the control flow shown in FIG.
先ず、ステップＳＡＩにおいて、庫内温度の急速冷却を
行い、ステップＳＡ２に移り、異常検知手段（１６）に
よって冷媒温度センサ（Ｔｈ１）。First, in step SAI, the temperature inside the refrigerator is rapidly cooled, and the process moves to step SA2, where the abnormality detection means (16) detects the refrigerant temperature sensor (Th1).
（Ｔｈ２）が異常か否かを判断する。そして、正常時に
は、ステップＳＡ２で待機し、両冷媒温度センサ（Ｔｈ
１）、 （Ｔｈ２）が正常か否かを険出し続けると共
に、膨張弁（５）は蒸発器（６）の入口側と出口側との
冷媒温度差による制御値に基づいて膨張弁制御手段（１
２）により開度制御され、庫内を急速冷却する。It is determined whether (Th2) is abnormal or not. During normal operation, it waits in step SA2, and both refrigerant temperature sensors (Th
1), (Th2) are normal or not, and the expansion valve (5) controls the expansion valve control means () based on the control value based on the refrigerant temperature difference between the inlet side and the outlet side of the evaporator (6). 1
2), the opening degree is controlled and the inside of the refrigerator is rapidly cooled.
一方、上記ステップＳＡ２において、異常と判断がなさ
れると、ステップＳＡ３に移り、設定手段（２２）に移
り、設定された庫内設定温度（ＳＰ）が所定温度、例え
ば、−５℃異常か否かが判断される。On the other hand, if it is determined that there is an abnormality in step SA2, the process moves to step SA3, where the setting means (22) determines whether or not the set temperature inside the refrigerator (SP) is abnormal at a predetermined temperature, for example, -5°C. will be judged.
続いて、庫内設定温度（ｓ ｐ）が−５℃以上に設定さ
れていると、ステップ°ＳＡ４に移り、吹出空気温度セ
ンサ（Ｔｈ４）が蒸発器（６）の吹出空気温度を検出し
、その後、ステップＳＡ５に移り、制御値変更手段（１
７１）が庫内設定温度（ｓ ｐ）と吹出空気温度（ＳＳ
）との温度差（八Ｔ）を求める。Subsequently, if the set internal temperature (sp) is set to -5°C or higher, the process moves to step SA4, where the outlet air temperature sensor (Th4) detects the outlet air temperature of the evaporator (6), After that, the process moves to step SA5, and the control value changing means (1
71) is the set internal temperature (sp) and the outlet air temperature (SS
) and find the temperature difference (8T).
次いで、ステップＳＡ６において、制御値変更手段（１
７１）の温度差を（△Ｔ）に基づき、温度差（八Ｔ）が
一定値となるべく膨張弁制御手段（１２）の制御有位が
変更されて、該膨張弁制御手段（１２）が電子膨張弁（
（５）の開度のＰＩＤ制御を行い急速冷凍運転を継続す
る。Next, in step SA6, the control value changing means (1
Based on the temperature difference (△T) of 71), the control position of the expansion valve control means (12) is changed so that the temperature difference (8T) becomes a constant value, and the expansion valve control means (12) is controlled electronically. Expansion valve (
(5) PID control of the opening degree is performed to continue rapid freezing operation.
次に、上記ステップＳＡ３において、庫内設定温度（Ｓ
Ｐ）が−５℃より低いならば、ステップＳＡ７に移り
、吸込空気温度センサ（Ｔｈ３）が蒸発器（６）の吸込
空気温度を検出し、その後、ステップＳＡ８に移り、制
御値変更手段（１７２）が庫内設定温度（ｓ ｐ）と吸
込空気温度（ＲＳ）との温度差（△Ｔ）を求める。次い
で、ステップＳＡ９において２、制御値変更手段（１７
２）の温度差（△Ｔ）に基づき、温度差（ΔＴ）が一定
値となるべく膨張弁制御手段（２２）の制御値が変更さ
れて、該膨張弁制御手段（１２）が電子膨張弁（５）の
開度のＰＩＤ制御を行い急速冷凍運転を継続する。Next, in step SA3, the set temperature inside the refrigerator (S
P) is lower than -5°C, the process moves to step SA7, where the suction air temperature sensor (Th3) detects the suction air temperature of the evaporator (6), and then, the process moves to step SA8, where the control value changing means (172 ) calculates the temperature difference (ΔT) between the set internal temperature (sp) and the suction air temperature (RS). Next, in step SA9, 2, the control value changing means (17
Based on the temperature difference (ΔT) of 2), the control value of the expansion valve control means (22) is changed so that the temperature difference (ΔT) becomes a constant value, and the expansion valve control means (12) controls the electronic expansion valve ( Perform PID control of the opening degree in 5) to continue rapid freezing operation.
次に、第５図の制御フローに基づき、請求項（３）及び
（４）に係る発明の制御動作について説明する。Next, the control operation of the invention according to claims (3) and (4) will be explained based on the control flow shown in FIG.
まず、ステップＳＢ１において、庫内温度が予め設定さ
れた所定温度範囲内にある冷凍運転が行われた場合、ス
テップＳＢ２に移り、入口側冷媒温度センサ（Ｔｈ１）
が異常か否か、具体的には、その表示が冷凍庫が実際に
はなり得ない。＋８０℃以上もしくは一８０℃以下であ
るか否かが異常検出手段（１６）により判断される。そ
して、正常な場合、ステップＳＢ３に移り、ステップＳ
Ｂ２と同様に、出口側冷媒温度センサ（Ｔｈ２）が異常
か否かが判断され、正常な場合、ステップＳ８２に戻り
、各センサ（Ｔｈ１）、 （Ｔｈ２）の異常を検出し
続け、電子膨張弁（５）を両センサ（ＴＩ）、（Ｔｈ２
）の出力信号で制御する。First, in step SB1, if a refrigeration operation is performed in which the internal temperature is within a predetermined temperature range, the process moves to step SB2, and the inlet side refrigerant temperature sensor (Th1)
Whether it is abnormal or not, specifically, the display cannot actually be in the freezer. The abnormality detection means (16) determines whether the temperature is above +80°C or below -80°C. If it is normal, the process moves to step SB3, and step S
Similarly to B2, it is determined whether the outlet side refrigerant temperature sensor (Th2) is abnormal or not. If it is normal, the process returns to step S82, continues to detect abnormalities in each sensor (Th1) and (Th2), and then the electronic expansion valve (5) for both sensors (TI), (Th2
) is controlled by the output signal of
一方、入口側冷媒温度センサ（Ｔｈ１）が異常ならば、
ステップＳＢ２においてＣＰＵ （２７）により出口側
冷媒温度Ｔｏが算出手段（２７１）で求められる。ここ
に、Ｔｏ−８Ｐ−α十ＳＨであり、ＳＰは庫内設定温度
、αは庫内温度が所定温度範囲内にある定常運転時にお
ける蒸発器（６）内冷媒蒸発温度と庫内温度との温度差
、ＳＨは蒸発器（６）の定常運転時における蒸発器（６
）の過熱度、すなわち蒸発器出入口の冷媒温度差であり
、αとＳＨの具体値はＳＰ等に応じてＣＰＵ（２７）に
て計算されるが、本実施例においてはｓｐが一１２℃と
の場合には、αは１０℃、ＳＨは３〜５℃である。On the other hand, if the inlet side refrigerant temperature sensor (Th1) is abnormal,
In step SB2, the outlet side refrigerant temperature To is determined by the CPU (27) by the calculation means (271). Here, To-8P-α+SH, SP is the set internal temperature, and α is the refrigerant evaporation temperature in the evaporator (6) and the internal temperature during steady operation when the internal temperature is within the predetermined temperature range. The temperature difference, SH, is the temperature difference of the evaporator (6) during steady operation of the evaporator (6).
), that is, the refrigerant temperature difference at the entrance and exit of the evaporator, and the specific values of α and SH are calculated by the CPU (27) according to the SP, etc., but in this example, the SP is -12°C. In the case of , α is 10°C and SH is 3 to 5°C.
従って、例えば、出口側冷媒温度Ｔｏ−１９℃〜−１７
℃が算出される。Therefore, for example, the outlet side refrigerant temperature To -19°C to -17°C
°C is calculated.
次いで、第３制御変更手段（１７３）のちとに、膨張弁
開度制御手段（１２）がステップＳＢ５にて、出口側冷
媒温度センサ（Ｔｈ２）の示度Ｔ。Next, after the third control change means (173), the expansion valve opening degree control means (12) changes the reading T of the outlet side refrigerant temperature sensor (Th2) in step SB5.
′とＴｏとの偏差ΔＴを求めた後、ステップＳＢ６に移
り、偏差へＴに基づき該偏差へＴが０となるように電子
膨張弁（５）の開度をＰＩＤ制御する。After determining the deviation ΔT between ' and To, the process moves to step SB6, and the opening degree of the electronic expansion valve (5) is PID-controlled based on the deviation T so that the deviation T becomes 0.
もし、異常でないなら、ステップＳＢＩに戻り、同じフ
ローが繰り返される。If there is no abnormality, the process returns to step SBI and the same flow is repeated.
また、ステップＳＢ３において、出口側冷媒温度センサ
（Ｔｈ２）が異常であるならば、ステップＳＢ７におい
て、ステップＳＢ４と同様にＣＰＵ （２７）により人
口側冷媒温度Ｔｉが求められる。ここに、Ｔｉ−３Ｐ−
αであり、本実施例では、ＳＰが一１２℃の場合には、
αは１０℃である。If the outlet side refrigerant temperature sensor (Th2) is abnormal in step SB3, the artificial side refrigerant temperature Ti is determined by the CPU (27) in step SB7, as in step SB4. Here, Ti-3P-
α, and in this example, when SP is -12°C,
α is 10°C.
次いで、第４制御変更手段（１７４）の指示のもとに、
膨張弁開度制御手段（１２）がステップＳＢ８にて、蒸
発器入口冷媒温度センサ（Ｔｈ１）の指度Ｔｉ′とＴｉ
との偏差へＴを求めた後、ステップＳＢ９にて、偏差へ
Ｔに基づき偏差へＴが０となるように電子膨張弁（５）
の開度をＰＩＤ制御する。Next, under the instruction of the fourth control change means (174),
In step SB8, the expansion valve opening control means (12) controls the indexes Ti' and Ti of the evaporator inlet refrigerant temperature sensor (Th1).
After finding the deviation T, in step SB9, the electronic expansion valve (5) is set so that the deviation T becomes 0 based on the deviation T.
The opening degree is PID controlled.
なお、本実施例における過熱度Ｓ Ｈ１庫内温度と蒸発
器内冷媒蒸発温度との温度差αと庫内設定温度ＳＰとの
関係、吹出空気温度ＳＳもしくは吸込空気温度つＲ３と
庫内設定温度ＳＰとの関係、温度差ΔＴを０もしくは一
定値とするべくなされる膨張弁開度の制御は、何も本実
施例に限られるものではない。In this example, the degree of superheating S H1 is the relationship between the temperature difference α between the internal temperature of the evaporator and the refrigerant evaporation temperature in the evaporator and the internal preset temperature SP, and the relationship between the outlet air temperature SS or the suction air temperature R3 and the internal preset temperature. The relationship with SP and the control of the expansion valve opening degree to make the temperature difference ΔT 0 or a constant value are not limited to the present embodiment.
（発明の効果）
以上説明したごとく、請求項（１）〜（５）に係る発明
によれば、蒸発器出口側もしくは入口側の冷媒温度検出
手段が異常の場合に、正常な冷凍温度検出手段もしくは
蒸発器の吸込もしくは吹出温度検出手段を利用して膨張
弁の開度制御がなされるようにしたことにより、膨張弁
を適正に開度制御することができるので、冷凍装置、適
切に運転することができる。(Effects of the Invention) As explained above, according to the inventions according to claims (1) to (5), when the refrigerant temperature detection means on the evaporator outlet side or inlet side is abnormal, the refrigerating temperature detection means is normal. Alternatively, by controlling the opening of the expansion valve using the suction or outlet temperature detection means of the evaporator, the opening of the expansion valve can be controlled appropriately, so that the refrigeration system can be operated properly. be able to.
そのため、請求項（１）に係る発明においては、例えば
、冷凍コンテナの場合、蒸発器の吹出空気温度を基準に
庫内温度を降下させるため、庫内の物品が損傷すること
なく、設定温度に降下せられる。Therefore, in the invention according to claim (1), for example, in the case of a refrigerated container, the temperature inside the refrigerator is lowered based on the temperature of the air blown out from the evaporator, so that the items inside the refrigerator are not damaged and reach the set temperature. be lowered.
また、請求項（２：Ｊに係る発明においては、蒸発器の
吸込空気温度を基準に庫内温度を降下させるため、庫内
冷凍物品が高温に爆される時間がイ菫かのまま、設定温
度に速やかに降下せられる。In addition, in the invention according to claim (2:J), in order to lower the temperature inside the refrigerator based on the intake air temperature of the evaporator, the time period during which the frozen articles in the refrigerator are exposed to high temperature is set as is. Allowed to drop to temperature quickly.
また、請求項（３）呼び（４）に係る発明では、庫内を
設定温度に保持し得るのみならず、蒸発器の温度も適切
に保持し得るため、蒸発器への庫内物品の水分の移行に
よる若布も少なく、ひいては、庫内吹出し空気温度、庫
内温度分布も良好に保持し得る。In addition, in the invention according to claim (3) and claim (4), not only can the inside of the refrigerator be maintained at a set temperature, but also the temperature of the evaporator can be appropriately maintained, so that moisture of the articles in the refrigerator can be kept in the evaporator. There is also less waste due to the migration, and as a result, the temperature of the air blown into the refrigerator and the temperature distribution within the refrigerator can be maintained well.
また、請求項（５）に係る発明では、各運転状態に対応
して上記効果をなし得る。Further, in the invention according to claim (5), the above effects can be achieved corresponding to each operating state.
第１図は本発明の構成を示すブロック図である。
第２図は本発明の実施例の冷媒回路図、第３図は電気回
路図、第４図及び第５図は制御フロー図である。
（１）・・・容量調整膨圧縮機、（２）・・・三方比例
弁、（３）・・・凝縮器、（５）・・・電子膨張弁、（
６）・・・蒸発器、（８）・・・冷媒循環回路、（１２
）・・・膨張弁制御手段、（Ａ）・・・冷凍装置、（Ｔ
ｈ１）・・・入口側冷媒温度センサ、（Ｔ ｈ ２）・
・・出口側冷媒温度センサ、（Ｔｈ３）・・・吸込空気
温度センサ、（Ｔｈ４）・・・吹出空気温度センサ、（
１２）・・・膨張弁、（１６）・・・異常検出手段、（
２１）・・・コントローラ、（２２）・・・庫内温度設
定器、（１７１）〜（１７４）・・・制御変更手段、（
２７１）・・・算出手段。
特 許 出 願 人 ダイキン工業株式会社１２・’、
７へばか２名
第４図FIG. 1 is a block diagram showing the configuration of the present invention. FIG. 2 is a refrigerant circuit diagram of an embodiment of the present invention, FIG. 3 is an electric circuit diagram, and FIGS. 4 and 5 are control flow diagrams. (1) Capacity adjustment expansion compressor, (2) Three-way proportional valve, (3) Condenser, (5) Electronic expansion valve, (
6)... Evaporator, (8)... Refrigerant circulation circuit, (12
)...Expansion valve control means, (A)...refrigeration device, (T
h1)...Inlet side refrigerant temperature sensor, (T h2)
...Outlet side refrigerant temperature sensor, (Th3)...Suction air temperature sensor, (Th4)...Blowout air temperature sensor, (
12)...Expansion valve, (16)...Abnormality detection means, (
21)...controller, (22)...interior temperature setting device, (171)-(174)...control change means, (
271)... Calculation means. Patent applicant: Daikin Industries, Ltd.
2 idiots to 7 Figure 4
Claims (5)
膨張弁（５）及び蒸発器（６）を直列に閉回路に接続し
てなる冷媒循環回路（８）を備えた冷凍装置において、
上記蒸発器（６）の入口側冷媒温度を検出する入口側冷
媒温度検出手段（Ｔｈ１）と、上記蒸発器（６）の出口
側冷媒温度で検出する出口側冷媒温度検出手段（Ｔｈ２
）と、上記両冷媒温度検出手段（Ｔｈ１），（Ｔｈ２）
から出力を受け、出口側冷媒温度と入口側冷媒温度との
温度差が一定になるように上記膨張弁（５）の開度を制
御する膨張弁制御手段（１２）と、上記冷媒温度検出手
段（Ｔｈ１），（Ｔｈ２）の少なくとも一方の異常を検
出する異常検出手段（１６）と所望の庫内温度を設定す
る設定手段（２２）と、上記蒸発器（６）の吹出空気温
度を検出する吹出空気温度検出手段（Ｔｈ４）と、上記
設定手段（２２）により庫内設定温度が所定値以上の範
囲内に設定された急速冷凍運転時において、上記異常検
出手段（１６）が異常信号を出力すると、上記膨張弁制
御手段（１２）による膨張弁（５）の開度制御を庫内設
定温度と蒸発器（６）の吹出温度との温度差に基づく制
御に変更する制御変更手段（１７１）とを備えているこ
とを特徴とする冷凍装置の運転制御装置。(1) Equipped with a refrigerant circulation circuit (8) consisting of a compressor (1), a condenser (3), an expansion valve (5) whose opening degree can be adjusted, and an evaporator (6) connected in series in a closed circuit. In the refrigeration equipment,
An inlet side refrigerant temperature detection means (Th1) detects the inlet side refrigerant temperature of the evaporator (6), and an outlet side refrigerant temperature detection means (Th2) that detects the outlet side refrigerant temperature of the evaporator (6).
), and both the refrigerant temperature detection means (Th1), (Th2)
an expansion valve control means (12) which receives an output from and controls the opening degree of the expansion valve (5) so that the temperature difference between the outlet side refrigerant temperature and the inlet side refrigerant temperature is constant; and the refrigerant temperature detection means. An abnormality detecting means (16) for detecting an abnormality in at least one of (Th1) and (Th2), a setting means (22) for setting a desired internal temperature, and detecting the temperature of the air blown from the evaporator (6). During a quick freezing operation in which the preset internal temperature is set to a predetermined value or higher by the outlet air temperature detection means (Th4) and the setting means (22), the abnormality detection means (16) outputs an abnormality signal. Then, control changing means (171) changes the opening degree control of the expansion valve (5) by the expansion valve control means (12) to control based on the temperature difference between the set internal temperature and the outlet temperature of the evaporator (6). An operation control device for a refrigeration system, comprising:
膨張弁（５）及び蒸発器（６）を直列に閉回路に接続し
てなる冷媒循環回路（８）を備えた冷凍装置において、
上記蒸発器（６）の出口側冷媒温度を検出する入口側冷
媒温度検出手段（Ｔｈ１）と、上記蒸発器（６）の出口
側冷媒温度を検出する冷媒温度検出手段（Ｔｈ２）と、
上記両冷媒温度検出手段（Ｔｈ１），（Ｔｈ２）から出
力を受け、出口側冷媒温度と入口側冷媒温度との温度差
が一定になるように上記膨張弁（５）の開度を制御する
膨張弁制御手段（１２）と、上記冷媒温度検出手段（Ｔ
ｈ１），（Ｔｈ２）の少なくとも一方の異常を検出する
異常検出手段（１６）と、所望の庫内温度を設定する設
定手段（２２）と、上記蒸発器（６）の吸込空気温度を
検出する吸込温度検出手段（Ｔｈ４）と、上記設定手段
（２２）により庫内設定温度が所定値未満の範囲内に設
定された急速冷凍運転時において、上記異常検出手段（
１６）が異常信号を出力すると、上記膨張弁制御手段（
１２）による膨張弁（５）の開度制御を庫内設定温度と
蒸発器（６）の吸込空気温度との温度差に基づく制御に
変更する制御変更手段（１７２）とを備えていることを
特徴とする冷凍装置の運転制御装置。(2) Equipped with a refrigerant circulation circuit (8) in which a compressor (1), a condenser (3), an expansion valve (5) whose opening degree can be adjusted, and an evaporator (6) are connected in series in a closed circuit. In the refrigeration equipment,
an inlet-side refrigerant temperature detection means (Th1) for detecting the outlet-side refrigerant temperature of the evaporator (6); a refrigerant temperature detection means (Th2) for detecting the outlet-side refrigerant temperature of the evaporator (6);
Expansion that receives output from both the refrigerant temperature detection means (Th1) and (Th2) and controls the opening degree of the expansion valve (5) so that the temperature difference between the outlet side refrigerant temperature and the inlet side refrigerant temperature is constant. The valve control means (12) and the refrigerant temperature detection means (T
an abnormality detection means (16) for detecting an abnormality in at least one of h1) and (Th2); a setting means (22) for setting a desired internal temperature; and a setting means (22) for detecting the intake air temperature of the evaporator (6). During the quick freezing operation in which the internal preset temperature is set within a range less than a predetermined value by the suction temperature detection means (Th4) and the setting means (22), the abnormality detection means (Th4)
16) outputs an abnormal signal, the expansion valve control means (
12) for changing the opening degree control of the expansion valve (5) to control based on the temperature difference between the set internal temperature and the intake air temperature of the evaporator (6). Features: Operation control device for refrigeration equipment.
膨張弁（５）及び蒸発器（６）を直列に閉回路に接続し
てなる冷媒循環回路（８）を備えた冷凍装置において、
上記蒸発器（６）の入口側冷媒温度を検出する入口側冷
媒温度検出手段（Ｔｈ１）と、上記蒸発器（６）の出口
側冷媒温度を検出する出口側冷媒温度検出手段（Ｔｈ２
）と、上記両冷媒温度検出手段（Ｔｈ１），（Ｔｈ２）
から出力を受け、出口側冷媒温度と入口側冷媒温度との
温度差が一定になるように上記膨張弁（５）の開度を制
御する膨張弁制御手段（１２）と、上記入口側冷媒温度
検出手段（Ｔｈ１）の異常を検出する異常検出手段（１
６）と所望の庫内温度を設定する設定手段（２２）と、
該設定手段（２２）によって設定された庫内設定温度に
基づいて蒸発器（６）の出口側冷媒温度を算出する算出
手段（２７１）と、庫内温度が設定温度に対して所定幅
をもった所定温度範囲内にある冷凍運転時において、上
記異常検出手段（１６）が異常信号を出力すると、上記
膨張弁制御手段（１２）による膨張弁（５）の制御を上
記出口側冷媒温度検出手段（Ｔｈ２）の冷媒温度と上記
算出手段（２７１）の算出温度に基づく制御に変更する
制御変更手段（１７３）とを備えていることを特徴とす
る冷凍装置の運転制御装置。(3) Equipped with a refrigerant circulation circuit (8) in which a compressor (1), a condenser (3), an expansion valve (5) whose opening degree can be adjusted, and an evaporator (6) are connected in series in a closed circuit. In the refrigeration equipment,
An inlet side refrigerant temperature detection means (Th1) detects the inlet side refrigerant temperature of the evaporator (6), and an outlet side refrigerant temperature detection means (Th2) that detects the outlet side refrigerant temperature of the evaporator (6).
), and both the refrigerant temperature detection means (Th1), (Th2)
an expansion valve control means (12) that receives an output from and controls the opening degree of the expansion valve (5) so that the temperature difference between the outlet side refrigerant temperature and the inlet side refrigerant temperature is constant; Abnormality detection means (1) detecting an abnormality of the detection means (Th1)
6) and a setting means (22) for setting a desired internal temperature;
calculation means (271) for calculating the outlet-side refrigerant temperature of the evaporator (6) based on the preset internal temperature set by the setting means (22); When the abnormality detection means (16) outputs an abnormality signal during refrigeration operation within a predetermined temperature range, the control of the expansion valve (5) by the expansion valve control means (12) is controlled by the outlet side refrigerant temperature detection means. An operation control device for a refrigeration system, comprising a control changing means (173) for changing the control to control based on the refrigerant temperature (Th2) and the temperature calculated by the calculating means (271).
膨張弁（５）及び蒸発器（６）を直列に閉回路に接続し
てなる冷媒循環回路（８）を備えた冷凍装置において、
上記蒸発器（６）の入口側冷媒温度を検出する入口側冷
媒温度検出手段（Ｔｈ１）と、上記蒸発器（６）の出口
側冷媒温度を検出する出口側冷媒温度検出手段（Ｔｈ２
）と、上記両冷媒温度検出手段（Ｔｈ１），（Ｔｈ２）
から出力を受け、出口側冷媒温度と入口側冷媒温度との
温度差が一定になるように上記膨張弁（５）の開度を制
御する膨張弁制御手段（１２）と、上記出口側冷媒温度
検出手段（Ｔｈ２）の異常を検出する異常検出手段（１
６）と所望の庫内温度を設定する設定手段（２２）と、
該設定手段（２２）によって設定された庫内設定温度に
基づいて蒸発器（６）の入口側冷媒温度を算出する算出
手段（２７１）と、庫内温度が設定温度に対して所定幅
をもった所定温度範囲内にある冷凍運転時において、上
記異常検出手段（１６）が異常信号を出力すると、上記
膨張弁制御手段（１２）による膨張弁（５）の制御を上
記入口側冷媒温度検出手段（Ｔｈ１）の冷媒温度と上記
算出手段（２７１）の算出温度に基づく制御に変更する
制御変更手段（１７４）とを備えていることを特徴とす
る冷凍装置の運転制御装置。(4) Equipped with a refrigerant circulation circuit (8) consisting of a compressor (1), a condenser (3), an expansion valve (5) whose opening degree can be adjusted, and an evaporator (6) connected in series in a closed circuit. In the refrigeration equipment,
An inlet side refrigerant temperature detection means (Th1) detects the inlet side refrigerant temperature of the evaporator (6), and an outlet side refrigerant temperature detection means (Th2) that detects the outlet side refrigerant temperature of the evaporator (6).
), and both the refrigerant temperature detection means (Th1), (Th2)
an expansion valve control means (12) that receives an output from and controls the opening degree of the expansion valve (5) so that the temperature difference between the outlet side refrigerant temperature and the inlet side refrigerant temperature is constant; Abnormality detection means (1) detecting an abnormality of the detection means (Th2)
6) and a setting means (22) for setting a desired internal temperature;
calculation means (271) for calculating the refrigerant temperature at the inlet side of the evaporator (6) based on the preset internal temperature set by the setting means (22); When the abnormality detection means (16) outputs an abnormality signal during refrigeration operation within a predetermined temperature range, the control of the expansion valve (5) by the expansion valve control means (12) is controlled by the inlet side refrigerant temperature detection means. An operation control device for a refrigeration system, comprising a control changing means (174) for changing the control to control based on the refrigerant temperature (Th1) and the temperature calculated by the calculating means (271).
膨張弁（５）及び蒸発器（６）を直列に閉回路に接続し
てなる冷媒循環回路（８）を備えた冷凍装置において、
上記蒸発器（６）の入口側冷媒温度を検出する入口側冷
媒温度検出手段（Ｔｈ１）と、上記蒸発器（６）の出口
側冷媒温度を検出する出口側冷媒温度検出手段（Ｔｈ２
）と、上記両冷媒温度検出手段（Ｔｈ１），（Ｔｈ２）
から出力を受け、出口側冷媒温度と入口側冷媒温度との
温度差が一定になるように上記膨張弁（５）の開度を制
御する膨張弁制御手段（１２）と、上記冷媒温度検出手
段の異常を検出する異常検出手段（１６）と所望の庫内
温度を設定する設定手段（２２）と、上記蒸発器（６）
の吸込空気及び吹出空気温度を検出する吸込温度検出手
段（Ｔｈ３）及び吹出温度検出手段（Ｔｈ４）と、上記
設定手段（２２）により庫内設定温度が所定値以上の範
囲内に設定された急速冷凍運転時において、上記異常検
出手段（１６）が異常信号を出力すると、上記膨張弁制
御手段（１２）による膨張弁（５）の開度制御を庫内設
定温度と蒸発器（６）の吹出空気温度との温度差に基づ
く制御に変更する第１制御変更手段（１７１）と、上記
設定手段（２２）により庫内温度が所定値未満の範囲に
設定された急速冷凍運転時において、上記異常検出手段
（１６）が異常信号を出力すると、上記膨張弁制御手段
による膨張弁（５）の制御を庫内温度の設定温度と蒸発
器（６）の吸込空気温度との温度差に基づく制御に変更
する第２制御変更手段（１７２）と、該設定手段（２２
）によって設定された庫内設定温度に基づいて蒸発器（
６）の入口側及び出口側冷媒温度を算出する算出手段（
２７１）と、庫内温度が設定温度に対して所定幅をもっ
た所定温度範囲内にある冷凍運転時において、上記異常
検出手段（１６）が入口側冷媒温度検出手段（Ｔｈ１）
の異常信号を出力すると、上記膨張弁制御手段（１２）
による膨張弁（５）の制御を上記出口側冷媒温度検出手
段（Ｔｈ２）の冷媒温度と上記算出手段（２７３）の算
出温度とに基づく制御に変更する第３制御変更手段（１
７３）と、庫内温度が設定温度に対して所定幅をもった
所定温度範囲内にある冷凍運転時において、上記異常検
出手段（１６）が出口側冷媒温度検出手段（Ｔｈ２）の
異常信号を出力すると、上記膨張弁制御手段（１２）に
よる膨張弁（５）の制御を上記入口側冷媒温度検出手段
（Ｔｈ１）の冷媒温度と上記算出手段（２７１）の算出
温度とに基づく制御に変更する第４制御変更手段（１７
４）とを備えていることを特徴とする冷凍装置の運転制
御装置。(5) Equipped with a refrigerant circulation circuit (8) in which a compressor (1), a condenser (3), an expansion valve (5) whose opening degree can be adjusted, and an evaporator (6) are connected in series in a closed circuit. In the refrigeration equipment,
An inlet side refrigerant temperature detection means (Th1) detects the inlet side refrigerant temperature of the evaporator (6), and an outlet side refrigerant temperature detection means (Th2) that detects the outlet side refrigerant temperature of the evaporator (6).
), and both the refrigerant temperature detection means (Th1), (Th2)
an expansion valve control means (12) which receives an output from and controls the opening degree of the expansion valve (5) so that the temperature difference between the outlet side refrigerant temperature and the inlet side refrigerant temperature is constant; and the refrigerant temperature detection means. an abnormality detection means (16) for detecting an abnormality in the above, a setting means (22) for setting a desired internal temperature, and the evaporator (6).
Suction temperature detection means (Th3) and outlet temperature detection means (Th4) for detecting the intake air and outlet air temperatures of During refrigeration operation, when the abnormality detection means (16) outputs an abnormality signal, the expansion valve control means (12) controls the opening degree of the expansion valve (5) to adjust the set temperature inside the refrigerator and the blowout of the evaporator (6). During the quick freezing operation in which the temperature inside the refrigerator is set to a range below a predetermined value by the first control change means (171) that changes the control to control based on the temperature difference with the air temperature and the setting means (22), the above abnormality is detected. When the detection means (16) outputs an abnormal signal, the expansion valve control means controls the expansion valve (5) based on the temperature difference between the set internal temperature and the intake air temperature of the evaporator (6). a second control changing means (172) for changing, and the setting means (22);
) based on the internal temperature set by the evaporator (
Calculation means (6) for calculating the inlet side and outlet side refrigerant temperatures
271), and during refrigeration operation when the internal temperature is within a predetermined temperature range with a predetermined width with respect to the set temperature, the abnormality detection means (16) detects the inlet side refrigerant temperature detection means (Th1).
When the abnormal signal is output, the expansion valve control means (12)
a third control changing means (1) for changing the control of the expansion valve (5) based on the refrigerant temperature of the outlet side refrigerant temperature detecting means (Th2) and the calculated temperature of the calculating means (273);
73), the abnormality detection means (16) detects an abnormality signal from the outlet side refrigerant temperature detection means (Th2) during the refrigeration operation when the internal temperature is within a predetermined temperature range with a predetermined width with respect to the set temperature. When output, the control of the expansion valve (5) by the expansion valve control means (12) is changed to control based on the refrigerant temperature of the inlet side refrigerant temperature detection means (Th1) and the calculated temperature of the calculation means (271). Fourth control change means (17
4) An operation control device for a refrigeration system, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6956989A JPH0730980B2 (en) | 1989-03-22 | 1989-03-22 | Refrigeration system operation controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6956989A JPH0730980B2 (en) | 1989-03-22 | 1989-03-22 | Refrigeration system operation controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02247472A true JPH02247472A (en) | 1990-10-03 |
| JPH0730980B2 JPH0730980B2 (en) | 1995-04-10 |
Family
ID=13406545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6956989A Expired - Lifetime JPH0730980B2 (en) | 1989-03-22 | 1989-03-22 | Refrigeration system operation controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730980B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0510657A (en) * | 1991-06-28 | 1993-01-19 | Sanyo Electric Co Ltd | Failure forecasting method for cooling storage |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5554161B2 (en) * | 2010-06-30 | 2014-07-23 | 三洋電機株式会社 | Refrigeration equipment |
-
1989
- 1989-03-22 JP JP6956989A patent/JPH0730980B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0510657A (en) * | 1991-06-28 | 1993-01-19 | Sanyo Electric Co Ltd | Failure forecasting method for cooling storage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0730980B2 (en) | 1995-04-10 |
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