JP2004020112A - Refrigerated storage equipment - Google Patents

Refrigerated storage equipment Download PDF

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Publication number
JP2004020112A
JP2004020112A JP2002177701A JP2002177701A JP2004020112A JP 2004020112 A JP2004020112 A JP 2004020112A JP 2002177701 A JP2002177701 A JP 2002177701A JP 2002177701 A JP2002177701 A JP 2002177701A JP 2004020112 A JP2004020112 A JP 2004020112A
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JP
Japan
Prior art keywords
temperature
compressor
temperature sensor
evaporator
refrigerant
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
JP2002177701A
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Japanese (ja)
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JP3913618B2 (en
Inventor
Junichi Furukawa
布留川 純一
Hideki Oyu
大湯 英樹
Yukinobu Nishikawa
西川 幸信
Shinji Hara
原 真二
Toshimichi Hirata
平田 俊通
Toshiharu Yokota
横田 俊春
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Priority to JP2002177701A priority Critical patent/JP3913618B2/en
Publication of JP2004020112A publication Critical patent/JP2004020112A/en
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Publication of JP3913618B2 publication Critical patent/JP3913618B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerated storage equipment reducing refrigerant leakage as much as possible by detecting cooling abnormality by effectively using a defrosting completion temperature sensor and indirectly detecting the refrigerant leakage from a refrigeration cycle, and lowering the manufacturing cost. <P>SOLUTION: When a compressor 17 starts the operation, a timer 34 is actuated to start the clocking of a sequential operation time. After clocking the lapse of a prescribed time (for example, two hours) of the sequential operation time, a control device 24 determines whether or not the detected temperature of a temperature sensor 23 is a set abnormal temperature or more. When a timer 39 clocks the lapse of a preset prescribed time (for example, thirty seconds), whether or not the detected temperature of the temperature sensor at that time is minus 8°C or more is determined. When it is a second time, a CPU 31 sets a leakage detecting flag, indirectly detects the refrigerant leakage by detecting the cooling abnormality, outputs a stop signal of the compressor 17, and stops the compressor 17. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、冷凍サイクルを備えた冷却貯蔵庫に関するものである。詳述すると、圧縮機、凝縮器及び蒸発器を配管接続して冷媒の循環路を形成して成る冷凍サイクルと、前記蒸発器に設けられる温度センサと、該温度センサの検出温度に基づいて前記蒸発器の除霜運転を制御する制御装置を備えた冷却貯蔵庫に関する。
【0002】
【従来の技術】
圧縮機、凝縮器及び蒸発器を配管接続して冷媒の循環路を形成して成る冷凍サイクルを備えた冷却貯蔵庫においては、冷凍サイクルに可燃性のHC冷媒を使用した冷却貯蔵庫が増加している。そして、HC冷媒を使用した冷凍サイクルでは、例えば前記蒸発器の冷媒出口側に温度センサ(以下、「出口温度センサ」という)を設けると共に冷媒入口側に温度センサ(以下、「入口温度センサ」という)を設け、入口温度センサと出口温度センサとの検出温度の差を監視し、温度差が所定の温度差以上になった時に、冷凍サイクルから冷媒が漏れていると判断し、冷媒漏れの発生を、例えば冷却貯蔵庫の表示部に表示させるものが知られている。
【0003】
ところで、上記のように蒸発器に2個の温度センサを設け、それぞれの検出温度に基づいて冷凍サイクルからの冷媒漏れを判断し、冷媒漏れを表示する場合に、それぞれの温度センサの検出温度に基づく冷媒漏れ判断のための温度設定が難しいという問題が生じる。
【0004】
また、利用者が冷媒漏れを気付くのが遅れ、冷媒漏れが発生しているにもかかわらず、冷凍サイクルの運転を継続した場合には、冷凍サイクルからの冷媒漏れの量が増加するという問題が発生する。
【0005】
【発明が解決しようとする課題】
冷媒漏れの判断のために2個の温度センサが必要であり、製造コストの上昇の原因になるという問題が生じることが判明した。
【0006】
本発明は、上記の点に鑑みて為されたものであり、除霜終了温度センサを有効に利用して、冷却異常を検知することにより冷凍サイクルからの冷媒の漏れを間接的に検知し、冷媒漏れ量を極力少なくし、また製造コストの低減を図った冷却貯蔵庫を提供することを目的とする。
【0007】
【課題を解決するための手段】
このため第1の発明は、圧縮機、凝縮器及び蒸発器を配管接続して冷媒の循環路を形成して成る冷凍サイクルと、前記蒸発器に設けられる温度センサと、該温度センサの検出温度に基づいて前記蒸発器の除霜運転を制御する制御装置を備えた冷却貯蔵庫において、前記温度センサの検出温度が所定温度に達したときに冷却異常と判断し、前記圧縮機の運転を停止するように制御する制御手段を備えたことを特徴とする。
【0008】
第2の発明は、圧縮機、凝縮器及び蒸発器を配管接続して冷媒の循環路を形成して成る冷凍サイクルと、前記蒸発器に設けられる温度センサと、該温度センサの検出温度に基づいて前記蒸発器の除霜運転を制御する制御装置を備えた冷却貯蔵庫において、前記圧縮機が所定時間連続して運転した際に、前記温度センサの検出温度が所定温度以上のときに冷却異常と判断し、前記圧縮機の運転を停止するように制御する制御手段を備えたことを特徴とする。
【0009】
第3の発明は、圧縮機、凝縮器及び蒸発器を配管接続して冷媒の循環路を形成して成る冷凍サイクルと、前記蒸発器に設けられる蒸発器温度センサと、庫内温度を検出するための庫内温度センサと、該庫内温度センサの検出温度に基づいて前記圧縮機の運転を制御して前記冷凍サイクルの運転を制御すると共に前記蒸発器温度センサの検出温度に基づいて前記蒸発器の除霜運転を制御する制御装置を備えた冷却貯蔵庫において、前面扉の開閉状態を検出する開閉検出手段と、該開閉検出手段による前記前面扉の開扉状態の連続検出時間を計時する第1タイマと、該開閉検出手段による前記前面扉の閉扉後の閉扉状態の連続検出時間を計時する第2タイマと、前記開閉検出手段による前記前面扉の開扉状態の連続検出時間が第1の所定時間内であり、閉扉後閉扉状態が第2の所定時間以上継続している場合に、前記庫内温度センサの検出温度が圧縮機の運転開始温度より所定温度以上高く、且つ蒸発器温度センサの検出温度が所定温度以上のときに冷却異常と判断し、前記圧縮機の運転を停止するように制御する制御手段とを備えたことを特徴とする。
【0010】
【発明の実施の形態】
以下本発明の実施の形態を図に基づき説明する。先ず、冷却貯蔵庫である冷蔵庫の正面図である図1において、1はそれぞれ前面扉が設けられた複数の食品保存室から成る冷却貯蔵庫としての冷蔵庫本体で、鋼板製の外箱と内箱及び両箱間に充填された発泡ウレタンなどの断熱材により構成されている。この冷蔵庫本体1の内部は断熱作用のある仕切壁により仕切られ、上部より冷蔵室2、野菜室3、製氷室4、温度切換室5及び冷凍室6を備えている。
【0011】
そして、前記冷蔵室2前面開口はハンドル7により開閉可能な回動式の冷蔵室扉8により閉塞可能であり、冷蔵室2の下の野菜室3、製氷室4、温度切換室5及び冷凍室6は引出し式の野菜室扉9、製氷室扉10、温度切換室扉11及び冷凍室扉12により夫々閉塞されている。また、各扉にはハンドル13、14、15、16が設けられている。20は冷蔵室扉8の前面に設けられたコントロールパネルである。
【0012】
また、図2に図示する冷凍サイクルは、圧縮機17、凝縮器18、減圧装置である膨張弁19、冷却器である蒸発器20および気液分離器であるアキュムレーター21などを、順次冷媒配管22で接続して、冷凍サイクルを構成している。蒸発器20は、庫内に配置されており、冷凍サイクルの運転時には、HC冷媒が矢印にて示したように循環し、蒸発器20で冷却された冷気は庫内を冷却している。
【0013】
また、前記蒸発器20には該蒸発器20の温度を検出する除霜終了温度センサとしての温度センサ23が設けられている。また、24は本冷蔵庫を統括して制御するマイクロコンピュータである制御装置である。
【0014】
図3は冷蔵庫の制御装置24を示すブロック図であり、図2及び図3と同一の部分には同一符号を付してある。制御装置24はCPU31、種々のデータを記憶するRAM32、各種制御プログラムを記憶したROM33、タイマ34、39、カウンタ38、扉開タイマ41、タイマ42などから構成され、各タイマ、冷蔵庫内温度センサ35、冷凍庫内温度センサ36、庫内温度設定部37などの情報に基づいてROM33に記憶されたプログラムに従って冷蔵庫の圧縮機17などの種々の運転、機能を制御する。
【0015】
また、40は冷蔵室扉8の開閉を検出する開閉検出スイッチであり、この開閉検出スイッチ40からの開扉信号に基づいて扉開タイマ41が開扉時間を計時する。
【0016】
そして、前記RAM32には、設定された庫内温度などが記憶される。また、前記ROM33には冷蔵庫本体1の運転制御プログラム、冷媒漏れ検出プログラムなどが記憶されている。
【0017】
以上のように構成された冷蔵庫の運転時には、冷蔵室2の温度調節レベルと冷蔵庫内温度センサ35が検出した温度とに応じてCPU31が動作し冷凍装置(冷凍サイクル)の運転が制御され、冷蔵室2が設定温度に保たれ、また同様に調節された冷凍室6の温度調節レベルと冷凍庫内温度センサ36が検出した温度とに応じてCPU31が動作し冷凍装置の運転が制御され、冷凍室6も設定温度に保たれ、また野菜室3、製氷室4及び温度切換室5の温度もほぼ設定温度に保たれる。
【0018】
また、蒸発器20の除霜運転時には、蒸発器20に設けられた図示しない除霜ヒータの加熱により霜が解ける。この結果、蒸発器20の温度、即ち温度センサ23の検出温度が次第に上昇し、予め設定されていた除霜終了温度に達すると、制御装置24のCPU31が動作し、除霜ヒータへの通電を停止し、除霜運転が終了する。
【0019】
従って、制御装置24は冷蔵庫内温度センサ35及び冷凍庫内温度センサ36の検出温度に基づいて前記圧縮機17の運転を制御して前記冷凍サイクルの運転を制御すると共に、前記温度センサ23の検出温度に基づいて前記除霜ヒータによる除霜運転を制御する。
【0020】
以下、圧縮機が連続運転している際の冷媒漏洩を検出する際の動作について、説明する。
【0021】
前記圧縮機17が停止している場合にはタイマ34をリセットすると共にカウンタ38の内容をクリアするが、圧縮機17が運転を開始すると、タイマ34が動作し圧縮機17の連続運転時間の計時を開始する。そして、連続運転時間の所定時間(例えば、2時間)経過を計時すると、制御装置24は蒸発器20の温度である温度センサ23の検出温度が設定された異常温度である、例えばマイナス8℃以上か否かを判断する。
【0022】
そして、予め設定されていた所定時間(例えば、30秒)経過をタイマ39が計時すると、再びその時点の温度センサ23の検出温度がマイナス8℃以上か否かが判断される。そして、上記のようにすでにマイナス8℃以上を1回検出しているため、今回が2回目であるときには、CPU31は漏洩検知フラグをセットして、冷却異常を検知することにより冷媒漏れを間接的に検知し、圧縮機17の停止信号を出力し、圧縮機17を停止させる。
【0023】
このため、冷媒漏れにより蒸発器20の温度が上昇することから、上述したように判断して、この圧縮機17の停止により、冷媒の外部への漏れを極力少なく抑えることができる。
【0024】
次に、圧縮機17のサイクル運転時の冷媒漏洩検出について説明する。
【0025】
圧縮機17のサイクル運転中でない場合には漏洩検知準備フラグをリセットすると共に扉開カウンタ41の内容をクリアする。そして、サイクル運転中であれば、制御装置24は開閉検出スイッチ40の出力により冷蔵室扉8が開扉したかを判断し、開扉したならば扉開タイマ41の計時を開始し、所定時間(例えば、30秒)経過したならば漏洩検知準備フラグをリセットすると共に扉開カウンタ41の内容をクリアし、この所定時間が経過する前に、冷蔵室扉8が閉められたか否かが前記開閉検出スイッチ40の状態から判断され、閉められたならばサイクル運転時の冷媒漏洩検知準備フラグがセットされる。
【0026】
そして、冷媒漏洩検知の準備が完了してなければ漏洩検知用タイマ42をリセットし、準備が完了したら該タイマ42が計時を開始し、所定時間(例えば30分間)経過したら、冷凍庫内温度センサ36による検出温度が圧縮機17がオンした時の温度より、例えば5℃以上高くなったかどうかが判断される。
【0027】
そして、5℃以上高くなっていれば、次に温度センサ23が異常温度であるマイナス8℃以上を検出したか否かが判断され、マイナス8℃以上を検出したものと判断すると、CPU31は漏洩検知フラグをセットして、冷却異常を検知することにより冷媒漏れを間接的に検知し、圧縮機17の停止信号を出力し、圧縮機17を停止させる。
【0028】
このため、この圧縮機17の停止により、冷媒の外部への漏れを極力少なく抑えることができる。
【0029】
以上本発明の実施態様について説明したが、上述の説明に基づいて当業者にとって種々の代替例、修正又は変形が可能であり、本発明はその趣旨を逸脱しない範囲で前述の種々の代替例、修正又は変形を包含するものである。
【0030】
【発明の効果】
以上のように本発明は、除霜終了温度センサを有効に利用して、冷却異常を検知することにより冷凍サイクルからの冷媒の漏れを間接的に検知し、冷媒漏れ量を極力少なくし、また製造コストの低減を図った冷却貯蔵庫を提供することができる。
【図面の簡単な説明】
【図1】冷蔵庫の正面図である。
【図2】冷凍サイクルを示す図である。
【図3】制御機能を示すブロック図である。
【符号の説明】
1       冷蔵庫本体
17      圧縮機
18      凝縮器
20      蒸発器
23      温度センサ
24      制御装置
34、39   タイマ
35      冷蔵庫内温度センサ
36      冷凍庫内温度センサ
40      開閉検出スイッチ
41      扉開タイマ
42      タイマ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cooling storage provided with a refrigeration cycle. More specifically, a compressor, a condenser and an evaporator are connected by pipes to form a refrigeration cycle of a refrigerant, a temperature sensor provided in the evaporator, and a temperature sensor based on a temperature detected by the temperature sensor. The present invention relates to a cooling storage provided with a control device for controlling a defrosting operation of an evaporator.
[0002]
[Prior art]
In a cooling storage provided with a refrigeration cycle in which a compressor, a condenser, and an evaporator are connected by piping to form a circulation path for a refrigerant, the number of cooling storages using a flammable HC refrigerant in the refrigeration cycle is increasing. . In a refrigeration cycle using an HC refrigerant, for example, a temperature sensor (hereinafter, referred to as an “outlet temperature sensor”) is provided at a refrigerant outlet side of the evaporator, and a temperature sensor (hereinafter, referred to as an “inlet temperature sensor”) is provided at a refrigerant inlet side. ) Is provided to monitor the difference between the detected temperature of the inlet temperature sensor and the detected temperature of the outlet temperature sensor. When the temperature difference exceeds a predetermined temperature difference, it is determined that the refrigerant is leaking from the refrigeration cycle. Is displayed on a display unit of a cooling storage, for example.
[0003]
By the way, as described above, two temperature sensors are provided in the evaporator, refrigerant leakage from the refrigeration cycle is determined based on the detected temperatures, and when the refrigerant leakage is indicated, the detected temperature of each temperature sensor is There is a problem that it is difficult to set a temperature for judging refrigerant leakage based on the temperature.
[0004]
In addition, when the user is late in noticing the refrigerant leak and continues to operate the refrigeration cycle despite the occurrence of the refrigerant leak, the amount of the refrigerant leak from the refrigeration cycle increases. appear.
[0005]
[Problems to be solved by the invention]
It has been found that two temperature sensors are required for judging a refrigerant leak, which causes a problem that the production cost is increased.
[0006]
The present invention has been made in view of the above points, by effectively utilizing the defrost end temperature sensor, indirectly detecting refrigerant leakage from the refrigeration cycle by detecting a cooling abnormality, An object of the present invention is to provide a cooling storage in which the amount of refrigerant leakage is reduced as much as possible and the production cost is reduced.
[0007]
[Means for Solving the Problems]
Therefore, a first invention provides a refrigeration cycle in which a compressor, a condenser, and an evaporator are connected by piping to form a circulation path for a refrigerant, a temperature sensor provided in the evaporator, and a temperature detected by the temperature sensor. In the cooling storage provided with a control device for controlling the defrosting operation of the evaporator based on the above, it is determined that the cooling is abnormal when the temperature detected by the temperature sensor reaches a predetermined temperature, and the operation of the compressor is stopped. Control means for performing such control.
[0008]
A second invention is based on a refrigeration cycle in which a compressor, a condenser, and an evaporator are connected by piping to form a circulation path for a refrigerant, a temperature sensor provided in the evaporator, and a temperature detected by the temperature sensor. In the cooling storage provided with a control device for controlling the defrosting operation of the evaporator, when the compressor is operated continuously for a predetermined time, when the temperature detected by the temperature sensor is equal to or higher than a predetermined temperature, a cooling abnormality is generated. It is characterized by comprising control means for judging and controlling to stop the operation of the compressor.
[0009]
According to a third aspect of the present invention, there is provided a refrigeration cycle in which a compressor, a condenser, and an evaporator are connected by pipes to form a circulation path for a refrigerant, an evaporator temperature sensor provided in the evaporator, and a temperature in the refrigerator. An internal temperature sensor for controlling the operation of the compressor based on the temperature detected by the internal temperature sensor to control the operation of the refrigeration cycle, and perform the evaporation based on the temperature detected by the evaporator temperature sensor. In a cooling storage provided with a control device for controlling the defrosting operation of the vessel, an opening / closing detecting means for detecting the open / closed state of the front door, and a second time measuring the continuous detection time of the open state of the front door by the open / close detecting means. A first timer, a second timer for measuring the continuous detection time of the closed state of the front door after the front door is closed by the open / close detection means, and a first detection time of the open state of the front door by the open / close detection means for the first time. Within a predetermined time In the case where the closed state after the door is closed has continued for the second predetermined time or more, the detection temperature of the internal temperature sensor is higher than the operation start temperature of the compressor by the predetermined temperature or more, and the detection temperature of the evaporator temperature sensor is A control means for determining that the cooling is abnormal when the temperature is equal to or higher than a predetermined temperature, and controlling to stop the operation of the compressor.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, in FIG. 1 which is a front view of a refrigerator serving as a cooling storage, reference numeral 1 denotes a refrigerator main body as a cooling storage comprising a plurality of food storage rooms each having a front door. It is made of a heat insulating material such as urethane foam filled between the boxes. The interior of the refrigerator main body 1 is partitioned by a partition wall having a heat insulating function, and includes a refrigerator room 2, a vegetable room 3, an ice making room 4, a temperature switching room 5, and a freezing room 6 from the top.
[0011]
The opening of the front of the refrigerator compartment 2 can be closed by a pivotable refrigerator compartment door 8 that can be opened and closed by a handle 7, and the vegetable compartment 3, the ice making compartment 4, the temperature switching compartment 5, and the freezer compartment below the refrigerator compartment 2. Reference numeral 6 denotes a drawer-type vegetable room door 9, an ice making room door 10, a temperature switching room door 11, and a freezing room door 12, respectively. Each door is provided with handles 13, 14, 15, and 16. Reference numeral 20 denotes a control panel provided on the front of the refrigerator compartment door 8.
[0012]
The refrigeration cycle illustrated in FIG. 2 includes a compressor 17, a condenser 18, an expansion valve 19 as a pressure reducing device, an evaporator 20 as a cooler, an accumulator 21 as a gas-liquid separator, and the like. 22 to form a refrigeration cycle. The evaporator 20 is disposed in the refrigerator, and during the operation of the refrigeration cycle, the HC refrigerant circulates as indicated by the arrow, and the cool air cooled by the evaporator 20 cools the refrigerator.
[0013]
Further, the evaporator 20 is provided with a temperature sensor 23 as a defrost end temperature sensor for detecting the temperature of the evaporator 20. Reference numeral 24 denotes a control device which is a microcomputer that controls the refrigerator.
[0014]
FIG. 3 is a block diagram showing the control device 24 of the refrigerator, and the same parts as those in FIGS. 2 and 3 are denoted by the same reference numerals. The control device 24 includes a CPU 31, a RAM 32 for storing various data, a ROM 33 for storing various control programs, timers 34 and 39, a counter 38, a door opening timer 41, a timer 42, and the like. Based on information from the freezer temperature sensor 36, the freezer temperature setting unit 37, and the like, various operations and functions of the compressor 17 of the refrigerator and the like are controlled in accordance with a program stored in the ROM 33.
[0015]
Reference numeral 40 denotes an opening / closing detection switch for detecting the opening / closing of the refrigerator compartment door 8, and a door opening timer 41 measures the opening time based on an opening signal from the opening / closing detection switch 40.
[0016]
The RAM 32 stores the set internal temperature and the like. The ROM 33 stores an operation control program for the refrigerator body 1, a refrigerant leak detection program, and the like.
[0017]
During the operation of the refrigerator configured as described above, the CPU 31 operates in accordance with the temperature adjustment level of the refrigerator compartment 2 and the temperature detected by the refrigerator temperature sensor 35 to control the operation of the refrigeration apparatus (refrigeration cycle), and to perform refrigeration. The temperature of the chamber 2 is maintained at the set temperature, and the CPU 31 operates according to the temperature control level of the freezing room 6 and the temperature detected by the freezer temperature sensor 36 which are similarly controlled to control the operation of the freezing device. 6 is also maintained at the set temperature, and the temperatures of the vegetable room 3, the ice making room 4, and the temperature switching room 5 are also substantially maintained at the set temperature.
[0018]
Further, during the defrosting operation of the evaporator 20, the frost is melted by heating a not-shown defrost heater provided on the evaporator 20. As a result, when the temperature of the evaporator 20, that is, the temperature detected by the temperature sensor 23 gradually rises and reaches a preset defrost end temperature, the CPU 31 of the control device 24 operates to turn on electricity to the defrost heater. It stops and the defrosting operation ends.
[0019]
Accordingly, the control device 24 controls the operation of the compressor 17 based on the detected temperatures of the refrigerator temperature sensor 35 and the freezer temperature sensor 36 to control the operation of the refrigeration cycle, and the detected temperature of the temperature sensor 23. The defrosting operation by the defrost heater is controlled based on
[0020]
Hereinafter, an operation for detecting a refrigerant leak when the compressor is continuously operated will be described.
[0021]
When the compressor 17 is stopped, the timer 34 is reset and the contents of the counter 38 are cleared. However, when the compressor 17 starts operating, the timer 34 operates to measure the continuous operation time of the compressor 17. To start. Then, when a predetermined time (for example, 2 hours) of the continuous operation time elapses, the control device 24 determines that the temperature detected by the temperature sensor 23 which is the temperature of the evaporator 20 is an abnormal temperature, for example, −8 ° C. or more. It is determined whether or not.
[0022]
When the timer 39 measures the elapse of a predetermined time (for example, 30 seconds) set in advance, it is determined again whether or not the temperature detected by the temperature sensor 23 at that time is −8 ° C. or more. Since the temperature of -8 ° C or more has already been detected once as described above, when this time is the second time, the CPU 31 sets a leak detection flag and indirectly detects a refrigerant leak by detecting a cooling abnormality. And outputs a stop signal of the compressor 17 to stop the compressor 17.
[0023]
For this reason, since the temperature of the evaporator 20 rises due to the refrigerant leakage, it is determined as described above, and by stopping the compressor 17, the leakage of the refrigerant to the outside can be suppressed as small as possible.
[0024]
Next, detection of refrigerant leakage during the cycle operation of the compressor 17 will be described.
[0025]
When the cycle operation of the compressor 17 is not being performed, the leak detection preparation flag is reset and the contents of the door open counter 41 are cleared. Then, during the cycle operation, the control device 24 determines whether or not the refrigerator compartment door 8 has been opened based on the output of the open / close detection switch 40, and starts the timing of the door open timer 41 when the door has been opened, for a predetermined time. After elapse of (for example, 30 seconds), the leak detection preparation flag is reset and the contents of the door open counter 41 are cleared, and it is determined whether or not the refrigerator compartment door 8 is closed before the predetermined time elapses. Judgment is made from the state of the detection switch 40, and if it is closed, the refrigerant leakage detection preparation flag during cycle operation is set.
[0026]
If the preparation for refrigerant leak detection is not completed, the timer 42 for leak detection is reset. When the preparation is completed, the timer 42 starts counting time. When a predetermined time (for example, 30 minutes) has elapsed, the freezer temperature sensor 36 Is higher than the temperature at the time when the compressor 17 is turned on, for example, 5 ° C. or more.
[0027]
If the temperature is higher than 5 ° C., then it is determined whether or not the temperature sensor 23 has detected an abnormal temperature of −8 ° C. or higher. By setting a detection flag and detecting a cooling abnormality, refrigerant leakage is indirectly detected, a stop signal for the compressor 17 is output, and the compressor 17 is stopped.
[0028]
Therefore, leakage of the refrigerant to the outside can be minimized by stopping the compressor 17.
[0029]
Although the embodiments of the present invention have been described above, various alternatives, modifications or variations are possible for those skilled in the art based on the above description, and the present invention provides various alternatives described above without departing from the spirit thereof. It is intended to cover modifications or variations.
[0030]
【The invention's effect】
As described above, the present invention effectively utilizes the defrost end temperature sensor, indirectly detects refrigerant leakage from the refrigeration cycle by detecting a cooling abnormality, and minimizes the amount of refrigerant leakage, It is possible to provide a cooling storage in which the manufacturing cost is reduced.
[Brief description of the drawings]
FIG. 1 is a front view of a refrigerator.
FIG. 2 is a diagram showing a refrigeration cycle.
FIG. 3 is a block diagram showing a control function.
[Explanation of symbols]
1 Refrigerator body 17 Compressor 18 Condenser 20 Evaporator 23 Temperature sensor 24 Control device 34, 39 Timer 35 Refrigerator temperature sensor 36 Freezer temperature sensor 40 Open / close detection switch 41 Door open timer 42 Timer

Claims (3)

圧縮機、凝縮器及び蒸発器を配管接続して冷媒の循環路を形成して成る冷凍サイクルと、前記蒸発器に設けられる温度センサと、該温度センサの検出温度に基づいて前記蒸発器の除霜運転を制御する制御装置を備えた冷却貯蔵庫において、前記温度センサの検出温度が所定温度に達したときに、前記圧縮機の運転を停止するように制御する制御手段を備えたことを特徴とする冷却貯蔵庫。A refrigerating cycle in which a compressor, a condenser, and an evaporator are connected by piping to form a circulation path for a refrigerant; a temperature sensor provided in the evaporator; In a cooling storage provided with a control device for controlling the frost operation, when a temperature detected by the temperature sensor reaches a predetermined temperature, a control means for controlling operation of the compressor to be stopped is provided. Cooling storage. 圧縮機、凝縮器及び蒸発器を配管接続して冷媒の循環路を形成して成る冷凍サイクルと、前記蒸発器に設けられる温度センサと、該温度センサの検出温度に基づいて前記蒸発器の除霜運転を制御する制御装置を備えた冷却貯蔵庫において、前記圧縮機が所定時間連続して運転した際に、前記温度センサの検出温度が所定温度以上のときに、前記圧縮機の運転を停止するように制御する制御手段を備えたことを特徴とする冷却貯蔵庫。A refrigerating cycle in which a compressor, a condenser, and an evaporator are connected by piping to form a circulation path for a refrigerant; a temperature sensor provided in the evaporator; In the cooling storage provided with the control device for controlling the frost operation, when the compressor is operated continuously for a predetermined time, when the temperature detected by the temperature sensor is equal to or higher than a predetermined temperature, the operation of the compressor is stopped. Cooling storage provided with control means for controlling the cooling storage. 圧縮機、凝縮器及び蒸発器を配管接続して冷媒の循環路を形成して成る冷凍サイクルと、前記蒸発器に設けられる蒸発器温度センサと、庫内温度を検出するための庫内温度センサと、該庫内温度センサの検出温度に基づいて前記圧縮機の運転を制御して前記冷凍サイクルの運転を制御すると共に前記蒸発器温度センサの検出温度に基づいて前記蒸発器の除霜運転を制御する制御装置を備えた冷却貯蔵庫において、前面扉の開閉状態を検出する開閉検出手段と、該開閉検出手段による前記前面扉の開扉状態の連続検出時間を計時する第1タイマと、該開閉検出手段による前記前面扉の閉扉後の閉扉状態の連続検出時間を計時する第2タイマと、前記開閉検出手段による前記前面扉の開扉状態の連続検出時間が第1の所定時間内であり、閉扉後閉扉状態が第2の所定時間以上継続している場合に、前記庫内温度センサの検出温度が圧縮機の運転開始温度より所定温度以上高く、且つ蒸発器温度センサの検出温度が所定温度以上のときに、前記圧縮機の運転を停止するように制御する制御手段とを備えたことを特徴とする冷却貯蔵庫。A refrigeration cycle formed by connecting a compressor, a condenser, and an evaporator with a pipe to form a circulation path for a refrigerant; an evaporator temperature sensor provided in the evaporator; Controlling the operation of the compressor based on the temperature detected by the internal temperature sensor to control the operation of the refrigeration cycle, and performing the defrosting operation of the evaporator based on the temperature detected by the evaporator temperature sensor. An opening / closing detecting means for detecting the open / closed state of the front door, a first timer for measuring a continuous detection time of the open state of the front door by the open / close detecting means, A second timer for measuring a continuous detection time of the closed state of the front door after the front door is closed by the detection means, and a continuous detection time of the open state of the front door by the open / close detection means is within a first predetermined time; Close after door close When the state has continued for the second predetermined time or longer, when the temperature detected by the internal temperature sensor is higher than the operation start temperature of the compressor by a predetermined temperature and the temperature detected by the evaporator temperature sensor is higher than the predetermined temperature. And a control means for controlling the operation of the compressor to be stopped.
JP2002177701A 2002-06-18 2002-06-18 Cooling storage Expired - Fee Related JP3913618B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009052823A (en) * 2007-08-28 2009-03-12 Fuji Electric Retail Systems Co Ltd Cooling system
JP2009250597A (en) * 2008-04-11 2009-10-29 Panasonic Corp Refrigerator
JP2019095164A (en) * 2017-11-28 2019-06-20 新星冷蔵工業株式会社 Cooling system
JP2020118318A (en) * 2019-01-21 2020-08-06 ホシザキ株式会社 Cooling storage
CN112944763A (en) * 2019-12-11 2021-06-11 博西华电器(江苏)有限公司 Refrigeration equipment control method and refrigeration equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009052823A (en) * 2007-08-28 2009-03-12 Fuji Electric Retail Systems Co Ltd Cooling system
JP2009250597A (en) * 2008-04-11 2009-10-29 Panasonic Corp Refrigerator
JP2019095164A (en) * 2017-11-28 2019-06-20 新星冷蔵工業株式会社 Cooling system
JP7340215B2 (en) 2017-11-28 2023-09-07 新星冷蔵工業株式会社 cooling system
JP2020118318A (en) * 2019-01-21 2020-08-06 ホシザキ株式会社 Cooling storage
JP7174635B2 (en) 2019-01-21 2022-11-17 ホシザキ株式会社 cold storage
CN112944763A (en) * 2019-12-11 2021-06-11 博西华电器(江苏)有限公司 Refrigeration equipment control method and refrigeration equipment

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