JP2650985B2 - refrigerator - Google Patents

refrigerator

Info

Publication number
JP2650985B2
JP2650985B2 JP28082688A JP28082688A JP2650985B2 JP 2650985 B2 JP2650985 B2 JP 2650985B2 JP 28082688 A JP28082688 A JP 28082688A JP 28082688 A JP28082688 A JP 28082688A JP 2650985 B2 JP2650985 B2 JP 2650985B2
Authority
JP
Japan
Prior art keywords
time
output
defrost
input
rapid cooling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP28082688A
Other languages
Japanese (ja)
Other versions
JPH02126082A (en
Inventor
修 山元
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Refrigeration Co
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 Matsushita Refrigeration Co filed Critical Matsushita Refrigeration Co
Priority to JP28082688A priority Critical patent/JP2650985B2/en
Publication of JPH02126082A publication Critical patent/JPH02126082A/en
Application granted granted Critical
Publication of JP2650985B2 publication Critical patent/JP2650985B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/28Quick cooling

Landscapes

  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Defrosting Systems (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、冷気強制循環方式の除霜制御機能と、急速
冷却機能を備えた冷蔵庫に関する。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having a defrost control function of a forced air circulation system and a rapid cooling function.

従来の技術 近年の冷蔵庫の除霜方式は、冷却負荷が重くなると冷
却器への着霜量が増加し冷気通風抵抗が大きくなるた
め、庫内冷気循環量が減少すると共に、冷却器の熱交換
効率も低下してしまう結果として、圧縮機の連続運転時
間が増加する現象を利用し、圧縮機の運転時間を積算
し、一定時間積算すると除霜開始すると共に、使用者が
所望の時期に圧縮機を一定時間連続運転する急速冷却運
転も行ない得る様にしたものが供されている。以下従来
例を第4図〜第5図に従い説明する。
2. Description of the Related Art In recent years, the defrosting method of refrigerators has a problem that, when the cooling load becomes heavy, the amount of frost formed on the cooler increases and the resistance of the cool air to the air increases. Utilizing the phenomenon that the continuous operation time of the compressor increases as a result of lowering the efficiency, the operation time of the compressor is integrated, and after a certain period of time integration, defrosting starts and the user compresses at the desired time. There is provided an apparatus capable of performing a rapid cooling operation in which the machine is continuously operated for a certain period of time. Hereinafter, a conventional example will be described with reference to FIGS.

1は冷蔵庫本体、2は外箱、3は内箱、4は断熱材で
ある。5は冷凍室、6は冷蔵室、7は冷却室である。前
記冷却室7内には冷却器8と冷気を冷凍室5と冷蔵室6
に送風するファン9を有する。又前記冷却器8には、冷
却器8に付いた霜を取り除く除霜ヒータ10が取り付けら
れている。冷凍室5及び冷蔵室6の間にはダクト11があ
り、これを通して冷気は両室に流れる。前記冷凍室5内
には、冷凍サイクル(図示せず)の圧縮機12の運転、停
止を制御する為に冷凍室5内の温度を検知するサーミス
タ13が取り付けてある。14は急速冷却運転を行い、圧縮
機12の通電を指令する急速冷却スイッチである。
1 is a refrigerator main body, 2 is an outer box, 3 is an inner box, and 4 is a heat insulating material. 5 is a freezing room, 6 is a refrigerator room, 7 is a cooling room. In the cooling chamber 7, a cooler 8 and cold air are stored in a freezing chamber 5 and a chilling chamber 6.
Has a fan 9 that blows air. The cooler 8 is provided with a defrost heater 10 for removing frost from the cooler 8. There is a duct 11 between the freezer compartment 5 and the refrigeration compartment 6, through which cool air flows to both compartments. In the freezer compartment 5, a thermistor 13 for detecting a temperature in the freezer compartment 5 for controlling operation and stop of a compressor 12 of a refrigerating cycle (not shown) is mounted. Reference numeral 14 denotes a rapid cooling switch for performing a rapid cooling operation and instructing the compressor 12 to be energized.

次に電気回路について説明する。前記ファン9及び圧
縮機12は並列に接続されリレー接点15に接続された後、
電源に接続されている。又前記除霜ヒータ10はリレー接
点16に接続された後、電源に接続されている。17は冷凍
室温度制御装置であり、前記サーミスタ13、抵抗R1,R2,
R3、コンパレータ18を備えている。コンパレータ18の出
力はOR回路19の一方の入力に接続されている。20は除霜
制御装置であり、前記OR回路19の出力がa入力に接続さ
れている。ここで除霜制御装置20について説明すると、
a及びd入力と、b及びc出力があり、a入力にHigh信
号(以下“H"と呼ぶ)が入力されるとb出力より“H"信
号が出力すると共に、a入力の“H"信号の時間を積算す
る。次に所定の時間(例えば14時間)積算するとb出力
はLow信号(以下“L"と呼ぶ)となりc出力より一定時
間(例えば30分間)“H"信号を出力する。但しd入力に
“H"信号が入力されている間は所定時間積算してもc出
力は“H"信号を出力せず、d入力が“L"になってからc
出力より“H"信号を出力するように構成されている。21
は急速冷却装置であり、急速冷却スイッチ14、急速冷却
タイマ22より成り、急速冷却スイッチ14の出力は急速冷
却タイマ22の入力に接続され、急速冷却タイマ22の出力
は一方は前記OR回路19のもう一方の入力に接続されると
共に、もう一方は前記除霜制御装置20のd入力に接続さ
れている。尚、急速冷却タイマ22は、“H"信号が入力さ
れると、一定時間(例えば3時間)“H"信号を出力す
る。除霜制御装置20のb出力はトランジスタ23のベース
に接続され、トランジスタ23のコレクタには、リレー接
点15を開閉さす吸収用のリレーコイル24が接続されてい
る。又除霜制御装置20のc出力はトランジスタ25のベー
スに接続され、トランジスタ25のコレクタには、リレー
接点16を開閉さす吸収用のリレーコイル26が接続されて
いる。
Next, an electric circuit will be described. After the fan 9 and the compressor 12 are connected in parallel and connected to the relay contact 15,
Connected to power. The defrost heater 10 is connected to a power source after being connected to a relay contact 16. 17 is a freezing compartment temperature control device, the thermistor 13, resistors R 1, R 2,
R 3 and a comparator 18 are provided. The output of the comparator 18 is connected to one input of the OR circuit 19. Reference numeral 20 denotes a defrost control device, and the output of the OR circuit 19 is connected to the a input. Here, the defrost control device 20 will be described.
There are a and d inputs and b and c outputs. When a High signal (hereinafter referred to as “H”) is input to the a input, an “H” signal is output from the b output, and an “H” signal of the a input is provided. Is integrated. Next, when integration is performed for a predetermined time (for example, 14 hours), the output b becomes a low signal (hereinafter referred to as “L”), and an “H” signal is output from the output c for a certain time (for example, 30 minutes). However, while the “H” signal is being input to the d input, the c output does not output the “H” signal even if the integration is performed for a predetermined time, and c is output after the d input becomes “L”.
It is configured to output an “H” signal from the output. twenty one
Is a rapid cooling device, which comprises a rapid cooling switch 14 and a rapid cooling timer 22; the output of the rapid cooling switch 14 is connected to the input of the rapid cooling timer 22; The other input is connected to the other input, and the other is connected to the d input of the defrost control device 20. When the "H" signal is input, the rapid cooling timer 22 outputs an "H" signal for a fixed time (for example, three hours). The output b of the defrost control device 20 is connected to the base of the transistor 23, and the collector of the transistor 23 is connected to an absorbing relay coil 24 for opening and closing the relay contact 15. The output c of the defrost control device 20 is connected to the base of the transistor 25. The collector of the transistor 25 is connected to an absorbing relay coil 26 for opening and closing the relay contact 16.

かかる構成において、冷凍室5の温度が所定値より高
い場合は、サーミスタ13の抵抗値RTHが小さくなってコ
ンパレータ18の出力は“H"信号を発生する。よってOR回
路19の出力も“H"となり、除霜制御装置20のa入力に入
力され、“H"信号を積算すると共に、b出力より“H"信
号を出力し、トランジスタ23がONしてリレーコイル24が
導通する。そしてリレー接点15が閉成して、圧縮機12及
びファン9が通電されて運転を行ない冷却器8が冷却作
用を行ない、ファン9にて冷凍室5、冷蔵室6にタクト
11を通して強制通風されて冷却作用を行なう。その後、
冷凍室5が所定温度に冷却されればサーミスタ13の抵抗
値RTHが大きくなりコンパレータ18の出力は“L"信号と
なる。又急速冷却運転は行なっていないので、急速冷却
タイマ22の出力も“L"の為、OR回路19の出力も“L"とな
り除霜制御装置20のa入力に入力される。除霜制御装置
20の積算は中断し、b出力も“L"となりトランジスタ23
がOFFしてリレーコイル24の導通が遮断されリレー接点1
5は開成し圧縮機12、ファン9が停止して冷却作用を停
止する。以後この作用を繰り返して通常の冷却作用が行
なわれる。
In such a configuration, when the temperature of the freezing compartment 5 is higher than the predetermined value, the output of the comparator 18 becomes smaller the resistance value R TH of the thermistor 13 generates a signal "H". Therefore, the output of the OR circuit 19 also becomes “H”, which is input to the “a” input of the defrost control device 20, integrates the “H” signal, outputs the “H” signal from the “b” output, and turns on the transistor 23. The relay coil 24 conducts. Then, the relay contact 15 is closed, the compressor 12 and the fan 9 are energized to operate, the cooler 8 performs a cooling action, and the fan 9 contacts the freezing room 5 and the refrigerating room 6.
It is forcibly ventilated through 11 to perform a cooling action. afterwards,
If the freezing compartment 5 is cooled to a predetermined temperature output of the resistance value R TH increases comparator 18 of the thermistor 13 becomes "L" signal. Also, since the rapid cooling operation is not performed, the output of the rapid cooling timer 22 is also "L", and the output of the OR circuit 19 is also "L" and is input to the "a" input of the defrost control device 20. Defrost control device
The integration of 20 is interrupted, the b output becomes “L” and the transistor 23
Turns OFF, the conduction of relay coil 24 is cut off, and relay contact 1
5 is opened, the compressor 12 and the fan 9 are stopped, and the cooling operation is stopped. Thereafter, this operation is repeated to perform a normal cooling operation.

次に除霜制御装置20の積算時間が所定時間積算される
とc出力より“H"信号出力されトランジスタ25がONし、
リレーコイル26が導通する。よってリレー接点16が閉成
し、除霜ヒータ10が通電され、冷却器8に付いた霜を取
り除く。以上、上述した内容を繰り返して行くが、使用
者が所望の時期に食品を急速冷却するために急速冷却ス
イッチ14をONする。よって急速冷却タイマ22より、一定
時間“H"信号を出力する。したがって、冷凍室5の温度
(コンパレータ18の出力)に関係なく、OR回路19の出力
は“H"となり除霜制御装置20のa入力に入力され、b出
力より“H"信号を出力しトランジスタ23がONする。よっ
て圧縮機12、ファン9が一定時間運転し、強制冷却され
る。尚急速冷却作用中、すなわち急速冷却タイマ22より
“H"信号が出力し、除霜制御装置20で“H"信号を積算し
ている途中に、所定の積算時間になっても、除霜制御装
置20のd出力は“H"の為、c出力は“H"にならず、d入
力が“L"になってから、c出力は“H"となる。すなわち
急速冷却運転中に、除霜時間と成っても急速冷却運転終
了後、除霜運転に入る。
Next, when the integration time of the defrost control device 20 is integrated for a predetermined time, an “H” signal is output from the output c, and the transistor 25 is turned on.
The relay coil 26 conducts. Therefore, the relay contact 16 is closed, the defrost heater 10 is energized, and the frost on the cooler 8 is removed. As described above, the user repeatedly turns on the quick cooling switch 14 in order to quickly cool the food at a desired time. Therefore, the "H" signal is output from the rapid cooling timer 22 for a certain period of time. Therefore, regardless of the temperature of the freezer compartment 5 (the output of the comparator 18), the output of the OR circuit 19 becomes "H", which is input to the "a" input of the defrost control device 20, and which outputs the "H" signal from the "b" output. 23 turns ON. Therefore, the compressor 12 and the fan 9 are operated for a certain period of time, and are forcibly cooled. During the rapid cooling operation, that is, while the “H” signal is output from the rapid cooling timer 22 and the “H” signal is being accumulated by the defrost control device 20, even if the predetermined accumulation time is reached, the defrost control is performed. Since the d output of the device 20 is "H", the c output does not become "H" and the c output becomes "H" after the d input becomes "L". That is, during the rapid cooling operation, the defrosting operation is started after the rapid cooling operation is completed even if the defrosting time is reached.

発明が解決しようとする課題 しかしながら、この様な構成において、除霜制御装置
20の“H"信号の積算時間は、除霜時の除霜ヒータ10の消
費電力量の増加や、除霜終了後の冷凍室5の温度上昇、
及び圧縮機12、ファン9の長時間連続運転による消費電
力量の増大を防ぐ為に、長い目に設定をしている。しか
し、外気温度の高い時や、冷凍室5、冷蔵室6に多量の
食品を入れられたりして負荷量が増えた時等は、圧縮機
12、ファン9は連続運転を続け、冷却器8には多量の霜
が付き、除霜時に霜を完全に取り除く事が出来ず、以後
の冷却作用では冷却器8の熱交換効率が低下し、不冷現
象を引き起こしていた。特に、負荷量増大の中で除霜制
御装置20の積算時間が所定時間に達する直前に急速冷却
運転に入ると、除霜運転は急速冷却運転終了後に行なう
為、冷却器8の霜付状態は一層多くなり、不冷現象を起
こし、庫内の食品の劣化、腐敗を起こしてしまう問題点
があった。
Problems to be Solved by the Invention However, in such a configuration, a defrost control device
The integration time of the “H” signal of 20 is determined by the increase in the power consumption of the defrost heater 10 during defrost, the increase in the temperature of the freezing compartment 5 after the end of defrost,
In order to prevent an increase in power consumption due to continuous operation of the compressor 12 and the fan 9 for a long time, a long time is set. However, when the outside air temperature is high, or when a large amount of food is put in the freezer compartment 5 or the refrigerator compartment 6 and the load increases, the compressor is not used.
12. The fan 9 continues to operate continuously, and the chiller 8 has a large amount of frost, cannot completely remove the frost during defrosting, and the heat exchange efficiency of the chiller 8 decreases in the subsequent cooling operation. It caused an uncooled phenomenon. In particular, if the rapid cooling operation is started immediately before the integrated time of the defrost control device 20 reaches the predetermined time during the load increase, the defrosting operation is performed after the rapid cooling operation is completed. There has been a problem that the temperature of the food is further increased, causing an uncooling phenomenon, and causing deterioration and spoilage of food in the refrigerator.

本発明は上述した問題を解消するものであり、従来の
除霜間隔の間に、冷却負荷量の大きい条件が存在した場
合でも適確に判断し、より信頼性の高い除霜制御を行な
わせ、冷却器の目詰り防止と、それに伴う庫内温度上昇
を防止することを目的としている。
The present invention has been made to solve the above-described problem, and makes it possible to accurately determine even if there is a large cooling load condition during the conventional defrost interval, and to perform more reliable defrost control. The purpose of the present invention is to prevent clogging of the cooler and to prevent a rise in the internal temperature of the cooler.

課題を解決するための手段 上記課題を解決するために本発明の冷蔵庫の除霜制御
装置は、圧縮機の所定積算時間経過後に冷蔵室のダンパ
ー連続“開”時間が所定時間経過すると除霜を行なうと
共に、急速冷却運転中にダンパー連続“開”時間が所定
時間になると急速冷却運転を中止し、除霜を行なうよう
に構成したものである。
Means for Solving the Problems In order to solve the above problems, a refrigerator defrosting control device of the present invention performs defrosting when a damper continuous “open” time of a refrigerator compartment elapses a predetermined time after a predetermined integration time of a compressor has elapsed. In addition, when the continuous "open" time of the damper reaches a predetermined time during the rapid cooling operation, the rapid cooling operation is stopped and defrosting is performed.

作用 本発明は上記した構成によって、冷蔵室のダンパーの
開放機会が多い様な負荷量の大きい場合は、ダンパーの
連続“開”時間が所定値を越えた場合は、冷却器の着霜
量が大と判断し、除霜開始する。又急速冷却運転中の場
合も、急速冷却運転を中止し、除霜を開始する。尚、反
対に冷蔵室のダンパーの開放機会が少ない様な負荷量の
小さい場合は、従来通り圧縮機の運転積算時間にて除霜
を開始する。
Effect of the Invention According to the above-described configuration, the present invention has the following advantages. When the load is large, such as when the damper of the refrigerator is frequently opened, the amount of frost on the cooler is reduced when the continuous "open" time of the damper exceeds a predetermined value. Judgment is large and defrosting is started. Also during the rapid cooling operation, the rapid cooling operation is stopped and defrosting is started. Conversely, when the load amount is small such that the chance of opening the damper of the refrigerator compartment is small, the defrosting is started in the accumulated operation time of the compressor as before.

実 施 例 以下、本発明の冷蔵庫の一実施例について第1図から
第3図に従い説明する。尚、従来と同一構成については
同一符号を付し、その詳細な説明を省略する。
Embodiment Hereinafter, an embodiment of the refrigerator of the present invention will be described with reference to FIGS. Note that the same components as those of the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

冷蔵室6の入口には電気的入力に応じて冷気流入量を
調節するダンパーサーモスタッタ27(以下、電動ダンパ
ー27という)が設けられている。電動ダンパー27の詳細
を説明すると、28はソレノイドで、29は前記ソレノイド
28により動作して冷気通路を開閉するダンパーである。
30はダンパーケースで、上部に風路部31、下部に機械部
32を形成している。33は、前記ダンパー29を開方向に押
し上げるロッドで、前記ダンパーケース30の一部を貫通
して風路部31と機械部32に連通し、その先端を風路部31
に上端を軸支された前記ダンパー29の下面一部に当接し
ている。34は、前記ロッド33と接合されたプランジャー
で、前記機械部32に収納されたソレノイド28の内心部に
挿入されて上下に可動する。35はスプリングで、通常時
はプランジャー34を下方に押し下げる様付勢している。
又36は、ダンパー29を閉方向に付勢するスプリングであ
る。次に、37は前記電動ダンパー27を収納するコントロ
ールパネルであり、コントロールパネル37には断熱材38
で形成した冷気吐出風路39が設けられている。又、40は
冷蔵室6内に設けたサーミスタがある。
At the entrance of the refrigerator compartment 6, a damper thermostat 27 (hereinafter referred to as an electric damper 27) for adjusting the amount of cool air inflow in accordance with an electric input is provided. To explain the details of the electric damper 27, 28 is a solenoid, 29 is the solenoid
This is a damper that operates by 28 to open and close the cool air passage.
Numeral 30 is a damper case.
Forming 32. Reference numeral 33 denotes a rod that pushes up the damper 29 in the opening direction, penetrates a part of the damper case 30, communicates with the air path section 31 and the mechanical section 32, and connects the tip thereof to the air path section 31.
The upper end is in contact with a part of the lower surface of the damper 29 whose shaft is supported. Numeral 34 denotes a plunger joined to the rod 33, which is inserted into the inner core of the solenoid 28 housed in the mechanical part 32 and moves up and down. A spring 35 normally urges the plunger 34 downward.
A spring 36 biases the damper 29 in the closing direction. Next, reference numeral 37 denotes a control panel for housing the electric damper 27. The control panel 37 includes a heat insulating material 38.
Is provided. Reference numeral 40 denotes a thermistor provided in the refrigerator compartment 6.

次に電気回路について説明する。ソレノイド28はリレ
ー接点41に接続された後、電源に接続されている。42は
冷蔵室温度制御装置で、サーミスタ40、コンパレータ43
より成り、コンパレータ43の出力は一方はトランジスタ
44のベースに接続され、更にもう一方はAND回路45に接
続されている。トランジスタ44のコレクタにはリレー接
点41を開閉さす吸収用のリレーコイル46が接続されてい
る。AND回路45の出力はタイマ47に接続されている。こ
こでタイマ47について説明する。入力に“H"信号が入力
されるとタイマカウントを開始し、一定時間(例えば1
時間)連続すると出力より“H"信号を一定時間(例えば
30分間)出力するように構成されている。48は急速冷却
装置で、急速冷却スイッチ14と急速冷却タイマ49より成
る。急速冷却タイマ47は従来例の急速冷却タイマ22にR
(リセット)入力が追加されたのみで、一定時間出力よ
り“H"信号が出力されている時にR入力に“H"信号が入
力されると出力は“L"となり、タイマカウントも中止と
なる。急速冷却タイマ49のR入力にはタイマ47の出力が
接続されている。又急速冷却タイマ49の出力はOR回路19
の入力に接続される。OR回路19の出力は、除霜制御装置
50のa入力に接続されている。ここで除霜制御装置50に
ついて説明すると、a入力と、b及びc出力は従来例の
除霜制御装置20と同じ構成であり、e出力の追加のみで
ある。除霜制御装置50のe出力は、a入力に“H"信号が
入力されると“H"信号の時間を積算し、所定時間(例え
ば7時間)積算するとe出力は“H"信号を出力し、c出
力が“H"信号を出力する迄“H"信号を出力し、c出力が
“H"信号に成るとe出力は“L"信号となる。尚、a入力
の“H"信号を積算してc出力よりなり“H"信号を出力す
る迄の積算時間Tcと、a入力の“H"信号を積算してe出
力より“H"信号を出力する迄の積算時間Teとの関係はTc
>Te(例えばTc:14時間、Te:7時間)である。除霜制御
装置50のe出力はAND回路45のもう一方の入力に接続さ
れている。タイマ47の出力はOR回路51の一方の入力にも
接続されており、OR回路51のもう一方の入力には除霜制
御装置50のc出力が接続されている。OR回路51の出力は
トランジスタ25のベースに接続されている。
Next, an electric circuit will be described. After the solenoid 28 is connected to the relay contact 41, it is connected to the power supply. Reference numeral 42 denotes a refrigerator temperature control device, which includes a thermistor 40 and a comparator 43.
The output of the comparator 43 is a transistor
The other end is connected to an AND circuit 45. The collector of the transistor 44 is connected to an absorbing relay coil 46 for opening and closing the relay contact 41. The output of the AND circuit 45 is connected to the timer 47. Here, the timer 47 will be described. When an “H” signal is input to the input, the timer starts counting and continues for a certain period of time (for example, 1).
When the signal continues for a certain period of time, the "H" signal is
30 minutes). Reference numeral 48 denotes a rapid cooling device, which comprises the rapid cooling switch 14 and a rapid cooling timer 49. The quick cooling timer 47 is R
(Reset) Only when an input is added, if the "H" signal is input to the R input while the "H" signal is being output from the output for a certain period of time, the output becomes "L" and the timer count is also stopped. . The output of the timer 47 is connected to the R input of the rapid cooling timer 49. The output of rapid cooling timer 49 is OR circuit 19
Connected to the input of The output of the OR circuit 19 is
Connected to 50 a input. Here, the defrost control device 50 will be described. The input a and the outputs b and c have the same configuration as the defrost control device 20 of the conventional example, and only the output e is added. The e output of the defrost controller 50 integrates the time of the "H" signal when the "H" signal is input to the a input, and outputs the "H" signal when integrated for a predetermined time (for example, 7 hours). The “H” signal is output until the “c” output outputs the “H” signal. When the “c” output becomes the “H” signal, the “e” output becomes the “L” signal. The "H" signal of the a input is integrated to output an "H" signal after the "H" signal is integrated, and the integration time Tc until the "H" signal is output. the relationship between the integrated time T e of until the output is T c
> T e (for example, T c : 14 hours, T e : 7 hours). The e output of the defrost control device 50 is connected to the other input of the AND circuit 45. The output of the timer 47 is also connected to one input of the OR circuit 51, and the other input of the OR circuit 51 is connected to the output c of the defrost control device 50. The output of the OR circuit 51 is connected to the base of the transistor 25.

かかる構成において、冷蔵室6の温度制御については
通常時、冷蔵室6の温度が所定値より高い場合は、サー
ミスタ40の抵抗値▲R TH▼が小さくなっており、コ
ンパレータ43の出力は“H"となる為、トランジスタ44が
ONしリレーコイル46が導通する。そしてリレー接点41が
閉成し電動ダンパー27のソレノイド28が導通するためダ
ンパー29が開放され冷蔵室6内に冷気が流入して冷却さ
れる。その後、冷蔵室6の温度が所定温度まで冷却され
れば、サーミスタ40の抵抗値▲R TH▼が大きくなっ
て、コンパレータ43の出力は“L"となり、トランジスタ
44がOFFしてリレーコイル46の導通が遮断する。そして
リレー接点41が開放するため、ソレノイド28への導通も
遮断されてダンパー29が閉成して冷蔵室6内への冷気の
流入を阻止する。以上の様な作用を繰り返して冷蔵室6
を冷蔵温度帯(0〜10℃)に維持する。
In such a configuration, usually at the time of the temperature control of the refrigerating compartment 6, when the temperature of the refrigerating compartment 6 is higher than the predetermined value, the resistance value of the thermistor 40 ▲ R 'TH ▼ has become smaller, the output of the comparator 43 is " H ", so transistor 44
Turns on and the relay coil 46 conducts. Then, the relay contact 41 is closed and the solenoid 28 of the electric damper 27 is conducted, so that the damper 29 is opened, and cool air flows into the refrigerator compartment 6 to be cooled. Thereafter, when the temperature of the refrigerator compartment 6 is cooled to a predetermined temperature, the resistance value {R TH ▼} of the thermistor 40 increases, the output of the comparator 43 becomes “L”, and the transistor
44 turns OFF and the conduction of the relay coil 46 is cut off. Then, since the relay contact 41 is opened, conduction to the solenoid 28 is also cut off, the damper 29 is closed, and the inflow of cool air into the refrigerator compartment 6 is prevented. By repeating the above operation, the refrigerator 6
Is maintained in the refrigerated temperature range (0-10 ° C).

次に除霜作用について述べると、除霜制御装置50のa
入力の“H"積算時間がTeに到達しない時は、e出力は
“L"の為、AND回路45の出力も“L"となりタイマ47はカ
ウントされない。その後、除霜制御装置50のa入力の
“H"積算がTeを積算すると、e出力は“H"となりAND回
路45の出力は他方の入力に依存する。ここで冷却器8の
負荷量が軽く、電動ダンパー27のダンパー29の“開”状
態の機会が少ない場合においては、タイマ47のタイマカ
ウント中、すなわちコンパレータ43の出力が“H"でダン
パー29が“開”状態の途中で、冷蔵室6の温度が所定温
度まで下がり、コンパレータ43の出力は“L"となりAND
回路45の出力も“L"となり、タイマ47のカウントはクリ
アされてしまう。すなわちタイマ47のカウント終了迄に
ダンパー29が“閉”状態となり、除霜制御装置50の積算
時間Tc迄経過後に、c出力より“H"信号が出力され、OR
回路51の出力も“H"となりトランジスタ25がONしてリレ
ーコイル26が導通する。よって除霜が開始する。次に除
霜制御装置50のa入力の“H"積算時間がTe経過後に、冷
却器8の負荷量が重く、電動ダンパー27のダンパー29の
“開”状態が多く、長い場合には、冷蔵室6の温度が高
く、コンパレータ43の出力が“H"でAND回路45の出力も
“H"よりタイマ47のカウントが開始され、一定時間カウ
ントされると、タイマ47の出力より一定時間“H"信号が
出力する。よってOR回路51の出力も“H"となりトランジ
スタ25がONして除霜が開始される。すなわち冷却器8の
負荷量が軽い場合は、除霜制御装置50のa入力の積算時
間がTc積算後に除霜に入る。又反対に冷却器8の負荷量
が重い場合は、除霜制御装置50のa入力の積算時間がTe
積算経過後に、ダンパー29の“開”状態が一定時間連続
すると、積算時間Tc積算前に除霜に入る。
Next, the defrosting operation will be described.
When "H" integration time of the input does not reach the T e, since the e output "L", the output of the AND circuit 45 also becomes "L" timer 47 is not counted. Thereafter, when the "H" integration of a input defrost controller 50 integrates the T e, e output the output of the "H" next to the AND circuit 45 depends on the other input. Here, when the load of the cooler 8 is light and the opportunity of the "open" state of the damper 29 of the electric damper 27 is small, the timer 47 is counting the timer, that is, the output of the comparator 43 is "H" and the damper 29 is turned off. During the “open” state, the temperature of the refrigerator compartment 6 drops to a predetermined temperature, and the output of the comparator 43 becomes “L” and AND
The output of the circuit 45 also becomes “L”, and the count of the timer 47 is cleared. That is, the damper 29 is in the "closed" state by the end of the counting by the timer 47, and after the lapse of the integrated time Tc of the defrost control device 50, the "H" signal is output from the c output, and the OR
The output of the circuit 51 also becomes "H", the transistor 25 is turned on, and the relay coil 26 is turned on. Therefore, defrost starts. Then after "H" integration time T e elapse of a input of defrosting control unit 50, loading of the cooler 8 is heavy, many "open" state of the damper 29 of the electric damper 27, if long, When the temperature of the refrigerator compartment 6 is high, the output of the comparator 43 is "H", and the output of the AND circuit 45 is also "H", the timer 47 starts counting. H "signal is output. Therefore, the output of the OR circuit 51 also becomes “H”, the transistor 25 is turned on, and defrosting is started. That is, when the load of the cooler 8 is light, the defrosting control device 50 starts defrosting after the integration time of the a input of the defrosting control device 50 is integrated by Tc . On the other hand, when the load of the cooler 8 is heavy, the integrated time of the a input of the defrost control device 50 is Te.
If the "open" state of the damper 29 continues for a certain period of time after the accumulation, the defrosting operation starts before the accumulation of the accumulation time Tc .

次に急速冷却運転中に、冷却器8の負荷量が重く、除
霜制御装置50のa入力の積算時間がTe積算し、ダンパー
29の“開”状態が一定時間連続すると、タイマ47より
“H"信号が出力され、急速冷却タイマ49のR入力に“H"
信号が入力され、急速冷却タイマ49のカウントは中止と
なり急速冷却運転は中止となると同時にタイマ47の出力
が“H"信号の為、OR回路51の出力も“H"となりトランジ
スタ25がONして除霜ヒータ10が通電され、除霜が開始す
る。すなわち急速冷却運転中に、冷却器8の負荷量が重
い状態での除霜開始信号が来た場合は、急速冷却運転を
中止し除霜を開始する。
Then during rapid cooling operation, load of the cooler 8 is heavy, the integration time of a input of a defrosting control unit 50 is integrated T e, the damper
When the “open” state of 29 continues for a certain period of time, an “H” signal is output from the timer 47 and “H” is input to the R input of the rapid cooling timer 49.
When the signal is input, the count of the rapid cooling timer 49 is stopped and the rapid cooling operation is stopped. At the same time, the output of the timer 47 is an "H" signal, so that the output of the OR circuit 51 is also "H" and the transistor 25 is turned on. The defrost heater 10 is energized, and defrost starts. That is, during the rapid cooling operation, when a defrost start signal is received in a state where the load of the cooler 8 is heavy, the rapid cooling operation is stopped and defrosting is started.

したがって、冷却負荷量が軽い場合には、圧縮機12の
積算時間をTc迄に延長し、無駄な除霜による消費電力量
が削減でき、冷却負荷量が重い場合には、圧縮機12の積
算時間がTe以上において、冷蔵室6内の電動ダンパー27
のダンパー29が“開”状態が一定時間以上になると除霜
を開始することにより、冷却器8の霜残りによる熱交換
効率が下がり不冷現象となり、食品の劣化を防ぐことが
できる。また冷却負荷量の重い時の急速冷却運転中に除
霜時期が来た場合、急速冷却運転を中止し、冷却器8の
霜残りを防止出来る。
Therefore, when the cooling load is light, the integration time of the compressor 12 is extended to Tc , the power consumption due to unnecessary defrost can be reduced, and when the cooling load is heavy, the compressor 12 When the integration time is equal to or longer than Te, the electric damper 27 in the refrigerator compartment 6
When the "open" state of the damper 29 for a certain period of time or more starts defrosting, the heat exchange efficiency due to the remaining frost in the cooler 8 decreases, resulting in a non-cooling phenomenon, thereby preventing food deterioration. When the defrosting time comes during the rapid cooling operation when the cooling load is heavy, the rapid cooling operation is stopped, and the frost remaining in the cooler 8 can be prevented.

発明の効果 以上の様に本発明の冷蔵庫によると以下の様な効果が
得られる。
Effects of the Invention As described above, according to the refrigerator of the present invention, the following effects can be obtained.

(1) 冷却負荷量が軽い場合の除霜開始は、圧縮機の
運転積算時間により、従来の除霜間隔(例えば14時間)
で除霜を開始し、無駄な除霜による消費電力を使用しな
くてよい。
(1) The start of defrosting when the cooling load is light is determined according to the conventional defrosting interval (for example, 14 hours) based on the cumulative operation time of the compressor.
To start defrosting, and it is not necessary to use power consumption by useless defrosting.

(2) 冷却負荷量が重い場合は、圧縮機の運転積算時
間が一定時間(例えば7時間)以上において、電動ダン
パーのダンパー連続“開”時間が一定時間(例えば1時
間)続くと除霜を開始するので、除霜時に冷却時に霜が
残り不冷却現象による食品の劣化を防止出来る。
(2) When the cooling load is heavy, defrosting is performed when the continuous "open" time of the damper of the electric damper continues for a certain time (for example, 1 hour) when the cumulative operation time of the compressor is equal to or more than a certain time (for example, 7 hours). Since it is started, frost remains at the time of cooling at the time of defrosting, and deterioration of food due to the uncooling phenomenon can be prevented.

(3) 急速冷却運転中に、冷却負荷量が重い場合での
除霜開始時期になった場合は、除霜制御を優先し、急速
冷却運転を中止することにより、(2)と同様に冷却器
の霜残りを防止出来る。
(3) During the rapid cooling operation, when the defrost start timing is reached when the cooling load is heavy, priority is given to the defrost control, and the rapid cooling operation is stopped to perform cooling in the same manner as (2). It is possible to prevent the frost residue of the vessel.

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

第1図は本発明の一実施例を示す冷蔵庫の制御回路図、
第2図は同冷蔵庫の縦断面図、第3図は第2図の冷蔵庫
の要部拡大図、第4図は従来例を示す冷蔵庫の縦断面
図、第5図は同冷蔵庫の制御回路図である。 1……冷蔵庫、5……冷凍室、6……冷蔵室、8……冷
却器、9……送風機、10……除霜ヒータ、12……圧縮
機、14……急速冷却スイッチ、29……ダンパー、47……
タイマ、48……急速冷却装置、50……除霜制御装置。
FIG. 1 is a control circuit diagram of a refrigerator showing one embodiment of the present invention,
2 is a longitudinal sectional view of the refrigerator, FIG. 3 is an enlarged view of a main part of the refrigerator of FIG. 2, FIG. 4 is a longitudinal sectional view of a refrigerator showing a conventional example, and FIG. 5 is a control circuit diagram of the refrigerator. It is. 1 ... Refrigerator, 5 ... Freezer, 6 ... Refrigerator, 8 ... Cooler, 9 ... Blower, 10 ... Defrost heater, 12 ... Compressor, 14 ... Rapid cooling switch, 29 ... … Damper, 47 ……
Timer, 48: Rapid cooling device, 50: Defrost control device.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】冷凍室と、冷蔵室と、冷凍サイクルの圧縮
機と、冷凍サイクルの冷却器にて冷却された冷気を循環
せしめる送風機と、前記冷却器の霜を溶かす除霜ヒータ
と、前記送風機にて循環された冷気量を“開”、“閉”
することにより前記冷蔵室内温度を調節するダンパー
と、前記圧縮機を急速冷却スイッチの投入にて一定時間
強制冷却運転させる急速冷却装置と、前記圧縮機の運転
時間を積算し除霜ヒータを通電させる除霜制御装置と、
前記ダンパーの連続“開”時間を計測するタイマより成
り、前記除霜制御装置が積算終了する迄の所定の積算時
間経過後に、前記タイマの時間が一定時間カウントした
場合は、除霜を開始すると共に、前記圧縮機の強制冷却
運転中に、前記タイマの時間カウントにて除霜開始時期
が来た時は、強制冷却運転を中止し、除霜を開始するよ
う構成した冷蔵庫。
A refrigeration chamber, a refrigerating chamber, a refrigerating cycle compressor, a blower for circulating cool air cooled by a refrigerating cycle cooler, a defrost heater for melting frost of the cooler, "Open" and "close" the amount of cool air circulated by the blower
And a rapid cooling device for forcibly cooling the compressor for a certain period of time by turning on a rapid cooling switch, and energizing the defrost heater by integrating the operation time of the compressor. A defrost control device;
A timer for measuring a continuous "open" time of the damper; if the timer counts for a predetermined time after a predetermined integration time elapses until the defrost control device finishes integration, defrosting is started; Further, a refrigerator configured to stop the forced cooling operation and start the defrosting when the defrost start time comes by the time count of the timer during the forced cooling operation of the compressor.
JP28082688A 1988-11-07 1988-11-07 refrigerator Expired - Lifetime JP2650985B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28082688A JP2650985B2 (en) 1988-11-07 1988-11-07 refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28082688A JP2650985B2 (en) 1988-11-07 1988-11-07 refrigerator

Publications (2)

Publication Number Publication Date
JPH02126082A JPH02126082A (en) 1990-05-15
JP2650985B2 true JP2650985B2 (en) 1997-09-10

Family

ID=17630524

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28082688A Expired - Lifetime JP2650985B2 (en) 1988-11-07 1988-11-07 refrigerator

Country Status (1)

Country Link
JP (1) JP2650985B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020044318A (en) * 2000-12-05 2002-06-15 윤종용 Vibroisolating device of compressor

Also Published As

Publication number Publication date
JPH02126082A (en) 1990-05-15

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