JP3484131B2 - Freezer refrigerator - Google Patents

Freezer refrigerator

Info

Publication number
JP3484131B2
JP3484131B2 JP2000048130A JP2000048130A JP3484131B2 JP 3484131 B2 JP3484131 B2 JP 3484131B2 JP 2000048130 A JP2000048130 A JP 2000048130A JP 2000048130 A JP2000048130 A JP 2000048130A JP 3484131 B2 JP3484131 B2 JP 3484131B2
Authority
JP
Japan
Prior art keywords
evaporator
compartment
air
freezer
refrigerator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2000048130A
Other languages
Japanese (ja)
Other versions
JP2001241825A (en
Inventor
悟 平國
嘉裕 隅田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2000048130A priority Critical patent/JP3484131B2/en
Publication of JP2001241825A publication Critical patent/JP2001241825A/en
Application granted granted Critical
Publication of JP3484131B2 publication Critical patent/JP3484131B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves

Landscapes

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

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は、オゾン層破壊や
地球温暖化などの地球環境に悪影響を与える恐れの少な
い冷凍冷蔵庫に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator / freezer which is less likely to adversely affect the global environment such as ozone layer depletion and global warming.

【０００２】[0002]

【従来の技術】現在、冷凍冷蔵庫の冷媒には、主にフロ
ン系冷媒が用いられている。フロン系冷媒の中でもＣＦ
Ｃ系およびＨＣＦＣ系冷媒は大気へ放出された場合、オ
ゾン層を破壊するため、ＨＦＣ系冷媒への移行が進めら
れている。家庭用冷蔵庫ではＨＦＣ系冷媒であるＲ１３
４ａが広く用いられている。2. Description of the Related Art At present, Freon refrigerants are mainly used as refrigerants for refrigerators and freezers. CF among fluorocarbon refrigerants
When the C-based and HCFC-based refrigerants are released to the atmosphere, they destroy the ozone layer, and therefore the transfer to the HFC-based refrigerants is being promoted. R13, which is an HFC refrigerant in household refrigerators
4a is widely used.

【０００３】図２２〜２４は、例えば特開平８‐２８５
４４０号公報に示された従来の家庭用冷蔵庫の側面断面
図、冷媒回路構成図、及び制御タイミングチャート図で
ある。図において、１は圧縮機、２は凝縮器、３は絞り
装置である毛細管、４は蒸発器、５は負荷変動時などに
発生する余剰冷媒を溜めるヘッダーであり、これらは順
次配管で接続され冷凍サイクルを形成している。22 to 24 show, for example, Japanese Patent Laid-Open No. 8-285.
It is a side sectional view, a refrigerant circuit block diagram, and a control timing chart figure of the conventional household refrigerator shown in JP440. In the figure, 1 is a compressor, 2 is a condenser, 3 is a capillary that is a throttle device, 4 is an evaporator, 5 is a header that stores excess refrigerant generated when load changes, etc., and these are sequentially connected by piping. Forming a refrigeration cycle.

【０００４】さらに、６は蒸発器４に付着する霜を溶か
すために蒸発器４の下方に設置された電気ヒータ（以下
電気ヒータと呼ぶ）、７は冷却システムＯＮ時間検出手
段、８は除霜タイマーで、圧縮機１の運転時間を積算す
るためのものである、１０は庫内温度検出手段、１１は
空気循環手段、１２は冷凍室への冷気循環制御手段であ
る冷凍室の空気循環制御手段、７３は冷蔵室につながる
開口部、１４は電気ヒータの上方に設けられたカサ、１
５は冷凍室、１６は冷蔵室、１８は冷蔵室空気吹出し
口、４４は冷凍室空気吸込み口である。Further, 6 is an electric heater (hereinafter referred to as an electric heater) installed below the evaporator 4 to melt the frost adhering to the evaporator 4, 7 is a cooling system ON time detecting means, and 8 is defrosting. A timer is for accumulating the operating time of the compressor 1, 10 is an inside temperature detecting means, 11 is an air circulating means, and 12 is an air circulation control of a freezing room which is a cold air circulation control means to the freezing room. Means, 73 is an opening connected to the refrigerating compartment, 14 is a cap provided above the electric heater, 1
Reference numeral 5 is a freezing compartment, 16 is a refrigerating compartment, 18 is a refrigerating compartment air outlet, and 44 is a freezing compartment air inlet.

【０００５】次に従来のフロン系冷媒を用いた冷蔵庫の
除霜動作について説明する。冷凍室庫内温度検出手段１
０が予め設定された温度Ｔ１に到達した時点で圧縮機１
を停止させる。次に、除霜タイマーが積算した冷却シス
テムＯＮ時間（圧縮機運転時間）を冷却システムＯＮ時
間検出手段において、予め設定された冷却システムＯＮ
時間（圧縮機運転時間）とを比較し、設定値より短い場
合は冷凍室の空気循環制御手段１２を閉じ、空気循環手
段１１をそのまま通電した状態で引き続き送風を行う。Next, the defrosting operation of the refrigerator using the conventional CFC refrigerant will be described. Freezing room temperature detection means 1
When 0 reaches the preset temperature T1, the compressor 1
To stop. Next, the cooling system ON time (compressor operating time) accumulated by the defrost timer is preset by the cooling system ON time detecting means.
The time (compressor operating time) is compared, and when it is shorter than the set value, the air circulation control means 12 of the freezing compartment is closed, and the air circulation means 11 is continuously energized to continue blowing.

【０００６】従って、空気循環手段１１により送風され
た空気は冷凍室の空気循環制御手段１２により冷凍室１
５には流れ込まず、開口部７３から庫内空気戻りダクト
２８を経て冷蔵室１６に流れ込む。そして冷蔵庫庫内を
冷却した上で５〜７℃程度の温度となり冷蔵室空気吸い
込み口１８から蒸発器４に戻り、蒸発器４と熱交換を行
い付着した霜を溶かす。Therefore, the air blown by the air circulation means 11 is controlled by the air circulation control means 12 of the refrigeration chamber 1
5 does not flow into the refrigerator 5, but flows into the refrigerating chamber 16 from the opening 73 through the air return duct 28 in the refrigerator. After cooling the inside of the refrigerator, the temperature of the refrigerator reaches 5 to 7 ° C. and returns to the evaporator 4 from the air intake 18 of the refrigerating room to exchange heat with the evaporator 4 to melt the attached frost.

【０００７】一方、除霜タイマーが積算した冷却システ
ムＯＮ時間（圧縮機運転時間）を冷却システムＯＮ時間
検出手段において、予め設定された冷却システムＯＮ時
間（圧縮機運転時間）とを比較し、設定値より長い場合
は冷凍室の空気循環制御手段１２を閉じ、空気循環手段
１１を停止させ除霜用の電気ヒータ６を通電し、電気ヒ
ータ６により加熱された空気が上方へ自然対流により上
昇し、蒸発器４に付着した霜を溶かす。これらの動作に
より、冷凍冷蔵庫の蒸発器４に付着した霜を取り除き効
率良く冷蔵庫を運転している。On the other hand, the cooling system ON time (compressor operating time) accumulated by the defrost timer is compared with the preset cooling system ON time (compressor operating time) in the cooling system ON time detecting means and set. If it is longer than the value, the air circulation control means 12 in the freezer is closed, the air circulation means 11 is stopped and the electric heater 6 for defrosting is energized, and the air heated by the electric heater 6 rises upward by natural convection. , Melt the frost attached to the evaporator 4. By these operations, the frost adhering to the evaporator 4 of the refrigerator-freezer is removed and the refrigerator is operated efficiently.

【０００８】また、ＨＦＣ系冷媒は大気放出された場
合、地球温暖化を促進する物質であり、地球環境を悪化
させない炭化水素系冷媒やアンモニアなどの自然冷媒を
冷蔵庫の冷媒として用いることが検討されている。自然
冷媒を用いた冷蔵庫としては、例えば特開平８−１７８
４８１号公報に示されたものがる。この冷凍冷蔵庫の冷
媒としては地球温暖化に対する影響は非常に小さいが、
可燃性を示すプロパンやブタンなどの炭化水素系冷媒が
用いられているFurther, the HFC-based refrigerant is a substance that promotes global warming when released into the atmosphere, and it has been considered to use a natural refrigerant such as a hydrocarbon-based refrigerant or ammonia that does not deteriorate the global environment as a refrigerant for a refrigerator. ing. As a refrigerator using a natural refrigerant, for example, Japanese Patent Laid-Open No. 8-178
There is one disclosed in Japanese Patent No. 481. As a refrigerant for this refrigerator / freezer, the impact on global warming is very small,
A hydrocarbon-based refrigerant such as propane or butane showing flammability is used.

【０００９】[0009]

【発明が解決しようとする課題】上記のような従来の冷
蔵庫に地球温暖化への影響が小さい可燃性冷媒を用いる
場合、まず可燃性に対する安全性の確保が最重要課題で
あり、万一冷媒が漏れても着火しないシステムを構築す
ることが重要である。When a flammable refrigerant having a small effect on global warming is used in the conventional refrigerator as described above, first of all, it is the most important issue to secure the safety against flammability, and in the unlikely event that the refrigerant is a refrigerant. It is important to build a system that will not ignite even if a leak occurs.

【００１０】さらに、地球温暖化を抑制するために、地
球温暖化への影響が小さい可燃性冷媒を用いることのみ
ならず冷凍冷蔵庫のエネルギー効率を向上させるべく、
電気ヒータによる除霜方法を改善することも重要な課題
となる。Further, in order to suppress the global warming, not only the use of a flammable refrigerant having a small influence on the global warming but also the energy efficiency of the refrigerator / freezer,
Improving the defrosting method using an electric heater is also an important issue.

【００１１】この発明は、上記のような課題を解決する
ためになされたもので、地球環境に対する悪影響の非常
に小さい冷媒を用いた冷凍冷蔵庫において安全性を大幅
に改善し、さらに効率を向上させた冷凍冷蔵庫を得るこ
とを目的としている。The present invention has been made in order to solve the above problems, and greatly improves the safety and further improves the efficiency of a refrigerating refrigerator using a refrigerant having a very small adverse effect on the global environment. The purpose is to get a freezer refrigerator.

【００１２】[0012]

【課題を解決するための手段】この発明に係る冷凍冷蔵
庫は、圧縮機、凝縮器、絞り装置、蒸発器を冷媒配管に
より順次連結してなる冷凍サイクルと、冷蔵室に設けら
れた冷蔵室温度検出手段と、冷凍室に設けられた冷凍室
温度検出手段と、冷蔵室温度検出手段により検知された
冷蔵室庫内温度と設定値とを比較し、冷蔵室への蒸発器
からの空気の循環を制御する冷蔵室の空気循環制御手段
と、冷凍室温度検出手段により検知された冷凍室庫内温
度と設定値とを比較し、冷凍室への蒸発器からの空気の
循環を制御する冷凍室の空気循環制御手段と、冷蔵室、
冷凍室等へ蒸発器からの空気を循環させる空気循環手段
と、を備え、冷凍室の空気循環制御手段が冷凍室へ空気
を搬送可能な状態もしくは冷蔵室の空気循環制御手段が
冷蔵室に空気を搬送可能な状態である場合に空気循環手
段を駆動させ、圧縮機が停止すると共に、冷凍室の空気
循環制御手段が冷凍室に空気を搬送不可能な状態であ
り、冷蔵室の温度が設定値より大きくなった場合に、冷
蔵室の空気循環制御手段が冷蔵室に空気を搬送可能な状
態に制御されることを特徴とする。 A refrigerating refrigerator according to the present invention comprises a refrigerating cycle in which a compressor, a condenser, a throttle device and an evaporator are sequentially connected by a refrigerant pipe, and a refrigerating compartment temperature provided in a refrigerating compartment. The air temperature from the evaporator to the refrigerating room is circulated to the refrigerating room by comparing the temperature inside the refrigerating room detected by the detecting means, the freezing room temperature detecting means provided in the freezing room, and the refrigerating room temperature detecting means with the set value. The air circulation control means of the refrigerating room controlling the temperature of the refrigerating room and the freezing room temperature detected by the freezing room temperature detecting means and the set value are compared to control the circulation of the air from the evaporator to the freezing room. Air circulation control means, a refrigerating room,
An air circulation means for circulating the air from the evaporator to the freezer compartment or the like, the air circulation control means of the freezer compartment being able to convey air to the freezer compartment or the air circulation control means of the refrigerating compartment When the air can be transported, the air circulation means is driven , the compressor stops, and the air in the freezer compartment
The circulation control means cannot convey air to the freezer.
If the temperature in the refrigerator compartment exceeds the set value,
The air circulation control means in the storage compartment can transfer air to the refrigerator compartment.
It is characterized by being controlled to a state.

【００１３】[0013]

【００１４】 また、この発明に係る冷凍冷蔵庫は、冷
凍サイクルの冷媒に可燃性冷媒を使用し、蒸発器の除霜
用の電気ヒータとして、通電した場合に電気ヒータの表
面温度が可燃性冷媒の着火温度以下になる容量の電気ヒ
ータを備え、圧縮機積算運転時間が設定値より長くなっ
た場合に電気ヒータに通電するように制御することを特
徴とする。[0014] In addition, the refrigerator according to the present invention, cold
Table of the electric heater when freeze using refrigerant flammable refrigerant cycle, as an electric heater for defrosting the evaporator, and energized
An electric heater with a capacity that keeps the surface temperature below the ignition temperature of the flammable refrigerant.
Comprises a chromatography data, and controls so as to energize the electric heater when the compressor integrated operating time is longer than the set value.

【００１５】 また、この発明に係る冷凍冷蔵庫は、凝
縮器と絞り装置との間に冷媒の流れを閉止することがで
きる遮断弁を設け、冷凍室温度検出手段の出力が予め設
定した値以下になった場合に遮断弁を閉止状態にし、圧
縮機を設定時間遅らせて停止させるように制御すること
を特徴とする。 [0015] In addition, the refrigerator according to the present invention, coagulation
It is possible to close the flow of refrigerant between the compressor and the expansion device.
Shut-off valve is installed, and the output of the freezer temperature detection means is preset.
When the pressure falls below the specified value, shut off the shutoff valve and
Control the compressor so that it stops after a set time.
Is characterized by.

【００１６】[0016]

【００１７】 また、この発明に係る冷凍冷蔵庫は、圧
縮機、凝縮器、流路切換弁を順次冷媒配管で接続し、流
路切換弁に絞り装置を並行に２つ接続し、一方の絞り装
置に一方の蒸発器を接続し、他方の絞り装置に除霜弁を
介して他方の蒸発器を接続し、一方の蒸発器の出口と前
記圧縮機からのバイパス流路とを除霜弁に接続した冷凍
サイクルと、冷蔵室に設けられた冷蔵室温度検出手段
と、冷凍室に設けられた冷凍室温度検出手段と、冷蔵室
へ一方の蒸発器からの空気を循環させる冷蔵室空気循環
手段と、冷凍室へ他方の蒸発器からの空気を循環させる
冷凍室空気循環手段と、を備え、流路切換弁は冷蔵室温
度検出手段が検出した冷蔵室温度が設定値より低くなっ
たら流路を他方の絞り装置に切換え、設定値より高くな
ったら所定時間後に一方の絞り装置に切換えると共に、
所定時間の間冷蔵室空気循環手段を運転して一方の蒸発
器の除霜を行い、圧縮機の運転積算時間が設定値よりも
大きくなった場合に、除霜弁をバイパス流路と他方の蒸
発器の入口が接続される流路に切換えて他方の蒸発器の
除霜を行うことを特徴とする。[0017] refrigerator according to the present invention, a compressor, a condenser, and connecting the flow path switching valve sequentially by refrigerant pipes, the flow path 2 is connected a throttle device in the switching valve in parallel, one aperture instrumentation
One evaporator is connected to the storage unit, and the defrost valve is attached to the other expansion device.
Connect the other evaporator via the outlet of one evaporator and the front
A refrigeration cycle in which a bypass flow path from the compressor is connected to a defrost valve, and a refrigerating compartment temperature detecting means provided in the refrigerating compartment.
And a freezer compartment temperature detecting means provided in the freezer compartment, a refrigerating compartment air circulating means for circulating air from one evaporator to the refrigerating compartment, and a freezing compartment for circulating air from the other evaporator to the freezer compartment. Air circulation means, and the flow path switching valve is refrigerated room temperature
Temperature detected by the temperature detection means is lower than the set value.
Switch the flow path to the other throttle device
After that, switch to one diaphragm device after a predetermined time,
Evaporate one side by operating the refrigerating room air circulation means for a predetermined time
Defrost the compressor and make the accumulated operating time of the compressor more than the set value.
If it becomes large, defrost the valve to bypass the bypass flow path and the other side.
Switch to the flow path to which the inlet of the generator is connected and switch the other evaporator
It is characterized by defrosting .

【００１８】また、絞り装置を毛細管としたものであ
る。Further, the squeezing device is a capillary tube.

【００１９】また、絞り装置と流路切換弁を連続的に開
度調整可能な流量制御弁としたものである。Further, the throttle device and the flow path switching valve are flow rate control valves whose opening can be continuously adjusted.

【００２０】 また、この発明に係る冷凍冷蔵庫は、圧
縮機、凝縮器、第１の流路切換弁を順次冷媒配管で接続
し、第１の流路切換弁に絞り装置を並行に２つ接続しそ
れぞれの絞り装置に第１、第２の蒸発器を接続し、第
１、第２の蒸発器の出口にそれぞれ第３、第４の流路切
換弁を接続し、第３の流路切換弁に第２の蒸発器の入口
に接続する第１接続配管及び第２絞り装置と圧縮機の吸
入側に接続する第２バイパス流路とを接続し、第４の流
路切換弁に第１の蒸発器の入口に接続する第２接続配管
及び第３絞り装置を接続し、第１、第２の蒸発器の入口
に圧縮機からの第１バイパス流路が接続された除霜弁か
らの配管を接続した冷凍サイクルと、冷蔵室に設けられ
た冷蔵室温度検出手段と、冷凍室に設けられた冷凍室温
度検出手段と、冷蔵室へ一方の蒸発器からの空気を循環
させる冷蔵室空気循環手段と、冷凍室へ他方の蒸発器か
らの空気を循環させる冷凍室空気循環手段と、を備え、
第１の蒸発器の除霜時、第１の流路切換弁を閉じ、除霜
弁により第１バイパス流路と第１の蒸発器の入口が連通
して第１の蒸発器が凝縮器、第２の蒸発器が蒸発器とな
るサイクルを構成し、第２の蒸発器の除霜時、第１の流
路切換弁を閉じ、除霜弁により第１バイパス流路と第２
の蒸発器の入口が連通して第２の蒸発器が凝縮器、第１
の蒸発器が蒸発器となるサイクルを構成することを特徴
とする。 Further, in the refrigerator-freezer according to the present invention, the compressor, the condenser, and the first flow path switching valve are sequentially connected by the refrigerant pipe, and two expansion devices are connected in parallel to the first flow path switching valve. and connecting the first, second evaporator to the respective throttle device, first
At the outlets of the 1st and 2nd evaporators, the 3rd and 4th passages are cut off respectively.
A switching valve is connected, and the inlet of the second evaporator is connected to the third flow path switching valve.
Of the first connecting pipe and the second expansion device connected to the
Connect to the second bypass channel connected to the inlet side, and
Second connection pipe for connecting the passage selector valve to the inlet of the first evaporator
And a third expansion device, and a refrigeration cycle in which the pipes from the defrost valve to which the first bypass flow path from the compressor is connected are connected to the inlets of the first and second evaporators , Refrigerating room temperature detecting means provided in the refrigerating room, freezing room temperature detecting means provided in the freezing room, refrigerating room air circulating means for circulating air from one evaporator to the refrigerating room, and the other to the freezing room A freezer air circulation means for circulating the air from the evaporator of
When defrosting the first evaporator, close the first flow path switching valve to defrost
The valve connects the first bypass channel and the inlet of the first evaporator.
The first evaporator is the condenser and the second evaporator is the evaporator.
The first flow during defrosting of the second evaporator.
The path switching valve is closed, and the defrost valve is used to connect the first bypass passage and the second bypass passage.
The second evaporator is connected to the condenser, and the first evaporator is connected to the first evaporator.
Characterized by forming a cycle in which the
And

【００２１】また、冷凍サイクルに可燃性冷媒を用いる
ものである。A flammable refrigerant is used in the refrigeration cycle.

【００２２】[0022]

【発明の実施の形態】実施の形態１．以下、この発明の
実施の形態１を図面を参照して説明する。図１〜６は実
施の形態１を示す図で、図１は冷凍冷蔵庫の側面断面
図、図２は冷凍冷蔵庫の冷媒回路図、図３は冷凍冷蔵庫
の制御タイミングチャート図、図４は冷凍冷蔵庫の冷蔵
室、野菜室と冷凍室を同時冷却する場合の冷蔵庫内空気
の流れを表す図、図５は冷凍冷蔵庫の冷凍室のみを冷却
する場合の冷蔵庫内空気の流れを表す図、図６は冷凍冷
蔵庫の除霜時の冷蔵庫内空気の流れを表す図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 to 6 are views showing a first embodiment, FIG. 1 is a side sectional view of a refrigerator-freezer, FIG. 2 is a refrigerant circuit diagram of the refrigerator-freezer, FIG. 3 is a control timing chart diagram of the refrigerator-freezer, and FIG. 4 is a refrigerator-freezer. Of FIG. 5 is a diagram showing the flow of air in the refrigerator when simultaneously cooling the refrigerator compartment, the vegetable compartment, and the freezer compartment. FIG. 5 is a diagram showing the flow of air in the refrigerator when cooling only the freezer compartment of the refrigerator-freezer. It is a figure showing the flow of the air in a refrigerator at the time of defrosting of a freezer.

【００２３】この冷凍サイクルの冷媒には地球温暖化に
非常に影響が小さい炭化水素系冷媒Ｒ６００ａを用いて
いる。図において、１は圧縮機、２は凝縮器、３は絞り
装置である毛細管、４は蒸発器、５は負荷変動時などに
発生する余剰冷媒を溜めるヘッダーであり、これらは順
次配管で接続され冷凍サイクルを形成している。As the refrigerant of this refrigeration cycle, a hydrocarbon refrigerant R600a which has a very small effect on global warming is used. In the figure, 1 is a compressor, 2 is a condenser, 3 is a capillary that is a throttle device, 4 is an evaporator, 5 is a header that stores excess refrigerant generated when load changes, etc., and these are sequentially connected by piping. Forming a refrigeration cycle.

【００２４】１５は冷凍室、１６は冷蔵室、２０は野菜
室、１０は冷凍室庫内温度検出手段、２１は冷蔵室庫内
温度検出手段、４は蒸発器、１１は空気循環手段、１２
は冷凍室への冷気循環制御手段である冷凍室の空気循環
制御手段、１３は冷蔵室への冷気循環制御手段である冷
蔵室の空気循環制御手段、１９は冷蔵室送風ダクト、１
８ａ〜１８ｄは冷蔵室空気吹き出し口、２５ａ，２５ｂ
は冷蔵室空気吸込み口、２６ａ〜２６ｃは野菜室空気吹
き出し口、２７ａ，２７ｂは野菜室空気吸込み口、２８
は空気の野菜室から蒸発器への庫内空気戻りダクト、４
４は冷凍室空気吸込み口である。Reference numeral 15 is a freezing compartment, 16 is a refrigerating compartment, 20 is a vegetable compartment, 10 is a freezer compartment internal temperature detecting means, 21 is a refrigerating compartment internal temperature detecting means, 4 is an evaporator, 11 is an air circulating means, 12
Is an air circulation control means for the freezing compartment which is a cooling air circulation control means for the freezing compartment, 13 is an air circulation control means for the refrigeration compartment which is a cooling air circulation control means for the refrigeration compartment, 19 is a refrigeration compartment air duct, 1
8a to 18d are air outlets for the refrigerating room, and 25a and 25b.
Is a refrigerator compartment air inlet, 26a to 26c are vegetable compartment air outlets, 27a and 27b are vegetable compartment air inlets, 28
Is an internal air return duct from the vegetable compartment to the evaporator, 4
Reference numeral 4 is an air inlet of the freezer.

【００２５】冷蔵室の空気循環制御手段１３は、冷蔵室
内に設置された冷蔵室庫内温度検知手段２１により検知
された冷蔵室庫内温度が予めコントローラ２３内に記憶
されている設定値より高い場合に開けられ、冷蔵室１６
に蒸発器４からの空気を導入可能とする。また、設定値
より低い場合は、冷蔵室の空気循環制御手段１３は閉
じ、蒸発器４から冷蔵室１６への空気の導入を遮断す
る。In the air circulation control means 13 of the refrigerating compartment, the refrigerating compartment internal temperature detected by the refrigerating compartment internal temperature detecting means 21 installed in the refrigerating compartment is higher than a preset value stored in the controller 23 in advance. If opened, refrigerating room 16
The air from the evaporator 4 can be introduced into. On the other hand, when the temperature is lower than the set value, the air circulation control means 13 of the refrigerating compartment is closed and the introduction of air from the evaporator 4 to the refrigerating compartment 16 is shut off.

【００２６】冷凍室の空気循環制御手段１２も、冷蔵室
の空気循環制御手段１３と同様に、冷凍室内に設置され
た冷凍室庫内温度検知手段１０により検知された冷凍室
庫内温度が予めコントローラ２３内に記憶されている設
定値より高い場合に開けられ、冷凍室１５に蒸発器４か
らの空気を導入可能とする。また、設定値より低い場合
は冷凍室の空気循環制御手段１２は閉じ、蒸発器４から
冷凍室１５への空気の導入を遮断する。Similarly to the air circulation control means 13 of the refrigerating room, the air circulation control means 12 of the freezing room is the temperature inside the freezing compartment detected by the temperature detecting means 10 inside the freezing compartment installed in the freezing room in advance. It is opened when it is higher than the set value stored in the controller 23, and the air from the evaporator 4 can be introduced into the freezer compartment 15. On the other hand, when the temperature is lower than the set value, the air circulation control means 12 of the freezing compartment is closed to shut off the introduction of air from the evaporator 4 into the freezing compartment 15.

【００２７】圧縮機１は冷凍室内に設置された冷凍室庫
内温度検出手段１０により検知された庫内温度が、コン
トローラ２３内に記憶されている設定値より高くなった
場合に運転させ、設定値以下になったら停止する。The compressor 1 is operated and set when the inside temperature detected by the inside-freezer temperature detecting means 10 installed in the inside of the freezer becomes higher than the set value stored in the controller 23. When it is less than the value, stop.

【００２８】空気循環手段１１は冷凍室の空気循環制御
手段１２、もしくは冷蔵室の空気循環制御手段１３のど
ちらか一方が開いた場合に通電され作動し、冷凍室の空
気循環制御手段１２および冷蔵室の空気循環制御手段１
３の両方が閉じた場合に停止する。The air circulation means 11 is energized and operated when either the air circulation control means 12 of the freezing compartment or the air circulation control means 13 of the refrigerating compartment is opened, and the air circulation control means 12 of the freezing compartment and the refrigeration Room air circulation control means 1
Stop if both 3 are closed.

【００２９】以上のように構成、制御された冷蔵庫の動
作と、冷蔵庫内空気の流れを図３〜６を用いて説明す
る。或る時間ｔ０において、圧縮機１、空気循環手段１
１とも運転中で、冷凍室の空気循環制御手段１２及び冷
蔵室の空気循環制御手段１３は開の状態であり、冷蔵室
１５及び冷凍室１６とも冷やされている。その間、蒸発
器４には霜が付着成長している。The operation of the refrigerator configured and controlled as described above and the flow of air in the refrigerator will be described with reference to FIGS. At a certain time t0, the compressor 1 and the air circulation means 1
1 is in operation, the air circulation control means 12 for the freezing compartment and the air circulation control means 13 for the refrigerating compartment are open, and both the refrigerating compartment 15 and the freezing compartment 16 are cooled. During that time, frost is attached and grown on the evaporator 4.

【００３０】冷蔵庫庫内空気の流れを図４に示す。冷蔵
庫庫内の空気の流れは、空気循環手段１１から吹出され
た空気は冷蔵室１６と冷凍室１５に分かれる。冷蔵室の
空気循環制御手段１３を通過した空気は冷蔵室用ダクト
１９を冷却しながら通過し、冷蔵室空気吹出し口１８
ａ、１８ｂ、１８ｃ、１８ｄから−２０℃程度で冷蔵室
１５に吹出す。吹出された空気は冷蔵室１５内を３〜５
℃程度に冷却しながら、冷蔵室吸込み口２５ａ、２５ｂ
に流れ込み、野菜室吹出し口２６ａ、２６ｂ、２６ｃか
ら野菜室２０に吹出される。The flow of air in the refrigerator is shown in FIG. Regarding the flow of air in the refrigerator, the air blown out from the air circulating means 11 is divided into a refrigerating room 16 and a freezing room 15. The air that has passed through the air circulation control means 13 of the refrigerating compartment passes while cooling the duct 19 for the refrigerating compartment, and the air outlet 18 of the refrigerating compartment is blown out.
It blows off from a, 18b, 18c, 18d to the refrigerating room 15 at about -20 degreeC. The blown air is 3-5 in the refrigerator compartment 15.
Refrigerating chamber suction ports 25a, 25b while cooling to about ℃
To the vegetable compartment 20 through the vegetable compartment outlets 26a, 26b, 26c.

【００３１】さらに野菜室２０を５〜７℃程度に冷却
し、蒸発器４への庫内空気戻りダクト２８を通過して５
〜７℃程度の温度で蒸発器４に流れ込む。‐３０℃程度
の蒸発器４と熱交換を行ないながら空気中の水分を蒸発
器４に奪われ、‐２７℃程度の空気となって再び蒸発器
４から吹出される。Further, the vegetable compartment 20 is cooled to about 5 to 7 ° C., and passed through an internal air return duct 28 to the evaporator 4 for 5 minutes.
It flows into the evaporator 4 at a temperature of about 7 ° C. Moisture in the air is taken by the evaporator 4 while exchanging heat with the evaporator 4 at about −30 ° C., and becomes air at about −27 ° C. and is blown out from the evaporator 4 again.

【００３２】一方、冷凍室の空気循環制御手段１２を通
過した空気は−３０℃程度で冷凍室１５に吹出され冷凍
室１５を冷却し、冷凍室下部の冷凍室空気吸込み口４４
から−２０℃程度で蒸発器４へ流れ込む。On the other hand, the air that has passed through the air circulation control means 12 of the freezing room is blown into the freezing room 15 at about -30 ° C. to cool the freezing room 15, and the freezing room air suction port 44 at the lower part of the freezing room.
From about −20 ° C. into the evaporator 4.

【００３３】時間ｔ１において、冷蔵室１６内に設置し
てある冷蔵室庫内温度検知手段２１により検知された温
度がコントローラ２３内に予め記憶されている設定値よ
り小さくなったため、冷蔵室の空気循環制御手段１３を
閉じるが、その他はそのままの状態が継続している。庫
内空気の流れは図５に示すように、冷凍室１５に吹出さ
れるのみとなる。At time t1, since the temperature detected by the refrigerating compartment internal temperature detecting means 21 installed in the refrigerating compartment 16 becomes lower than the preset value stored in the controller 23 in advance, the air in the refrigerating compartment is reduced. The circulation control means 13 is closed, but the other states remain unchanged. As shown in FIG. 5, the flow of air in the refrigerator is only blown to the freezing compartment 15.

【００３４】時間ｔ２において、冷凍室１５内に設置し
てある冷凍室庫内温度検知手段１０により検知された温
度がコントローラ２３内に予め記憶されている設定値よ
り小さくなったため、冷凍室の空気循環制御手段１２を
閉じ、圧縮機１も停止させる。一方、冷蔵室の空気循環
制御手段１３はコントローラ２３内に予め記憶されてい
る設定値より冷蔵室温度が大きくなったことにより、冷
蔵室の空気循環制御手段１３を開け蒸発器４から冷蔵室
用ダクト１９を連通させる。野菜室２０からの空気は５
〜７℃であるので蒸発器４に付着した霜を溶かしながら
蒸発器４と熱交換する。冷蔵室１６への吹出し温度は‐
５℃〜０℃程度で十分に水分を含んだ空気であり、冷蔵
室１６を加熱することはない。At time t2, the temperature detected by the temperature detecting means 10 in the freezer compartment installed in the freezer compartment 15 becomes lower than the preset value stored in the controller 23, so that the air in the freezer compartment is cooled. The circulation control means 12 is closed and the compressor 1 is also stopped. On the other hand, the air circulation control means 13 of the refrigerating compartment opens the air circulation control means 13 of the refrigerating compartment from the evaporator 4 for the refrigerating compartment because the temperature of the refrigerating compartment becomes higher than the preset value stored in the controller 23 in advance. The duct 19 is communicated. The air from the vegetable compartment 20 is 5
Since the temperature is -7 ° C, heat is exchanged with the evaporator 4 while melting the frost attached to the evaporator 4. The blowing temperature to the refrigerating room 16 is-
The air is sufficiently moistened at about 5 ° C. to 0 ° C., and does not heat the refrigerating chamber 16.

【００３５】時間ｔ３において、冷凍室１５内に設置し
てある冷凍室庫内温度検知手段１０により検知された温
度がコントローラ２３内に予め記憶されている設定値よ
り大きくなったため、冷凍室の空気循環制御手段１２を
開け、圧縮機１を運転させる。一方、冷蔵室の空気循環
制御手段１３はコントローラ２３内記憶してある冷蔵室
設定温度より低くなっているため冷蔵室の空気循環制御
手段１３を閉じる。庫内空気の流れは図５のように再び
なり、冷凍室１５のみ冷却を行なう。At time t3, the temperature detected by the freezer compartment internal temperature detecting means 10 installed in the freezer compartment 15 becomes higher than the preset value stored in the controller 23. The circulation control means 12 is opened and the compressor 1 is operated. On the other hand, the air circulation control means 13 of the refrigerating compartment is closed because the air circulation control means 13 of the refrigerating compartment is lower than the preset temperature of the refrigerating compartment stored in the controller 23. The flow of air in the refrigerator is again as shown in FIG. 5, and only the freezing compartment 15 is cooled.

【００３６】時間ｔ４において、冷凍室１５内に設置し
てある冷凍室庫内温度検知手段１０により検知された温
度がコントローラ２３内に予め記憶されている設定値よ
り小さくなったため、冷凍室の空気循環制御手段１２を
閉じ、圧縮機１を停止させる。一方、冷蔵室の空気循環
制御手段１３はコントローラ２３内記憶してある冷蔵室
設定温度より低くい状態を継続しているため、閉じた状
態を継続する。空気循環手段１１は冷蔵室の空気循環制
御手段１３および冷凍室の空気循環制御手段１２が閉じ
たことを検知し停止する。At time t4, the temperature detected by the freezer compartment internal temperature detecting means 10 installed in the freezer compartment 15 becomes lower than the preset value stored in the controller 23, so that the air in the freezer compartment is cooled. The circulation control means 12 is closed and the compressor 1 is stopped. On the other hand, since the air circulation control means 13 of the refrigerating room continues to be in a state of being lower than the refrigerating room set temperature stored in the controller 23, the closed state is continued. The air circulation means 11 detects that the air circulation control means 13 in the refrigerating room and the air circulation control means 12 in the freezing room are closed and stops.

【００３７】上記のように冷蔵室の空気循環制御手段１
３、冷凍室の空気循環制御手段１２および空気循環手段
１１を制御するため、冷蔵室１６は圧縮機１停止中に蒸
発器４の熱容量（霜、銅配管、アルミフィン、冷媒）で
冷却され、蒸発器４の熱容量で足りない場合は圧縮機１
による冷却を行なうこととなる。また、冷凍室１５は圧
縮機運転中に冷却される。As described above, the air circulation control means 1 for the refrigerating compartment
3. In order to control the air circulation control means 12 and the air circulation means 11 of the freezer compartment, the refrigerating compartment 16 is cooled by the heat capacity (frost, copper pipes, aluminum fins, refrigerant) of the evaporator 4 while the compressor 1 is stopped, If the heat capacity of the evaporator 4 is insufficient, the compressor 1
Will be cooled by. Further, the freezer compartment 15 is cooled during the operation of the compressor.

【００３８】従来のＲ１３４ａなどのフロン系冷媒を用
いた冷蔵庫では、除霜を行なうタイミングを圧縮機の積
算運転時間などで判断し、電気ヒータにより除霜を行う
場合に比べ、本実施の形態のごとく冷蔵室１６および野
菜室２０の庫内空気を熱源として除霜を行なえば、必要
以上に冷蔵庫庫内に負荷をかけることはない。In a conventional refrigerator using a freon-based refrigerant such as R134a, the timing of defrosting is judged by the cumulative operating time of the compressor and the like, and compared with the case where defrosting is performed by an electric heater. As described above, if defrosting is performed using the air inside the refrigerator compartment 16 and the vegetable compartment 20 as a heat source, the refrigerator compartment will not be overloaded.

【００３９】更に可燃性冷媒であるＲ６００ａを用いた
場合、冷蔵庫内に冷媒が漏れた場合を想定すると従来の
電気ヒータ容量では着火源となり得る可能性があり危険
である。しかし、本実施の形態では霜を溶かすために冷
蔵庫内の空気を熱源とするため万一冷蔵庫内に冷媒が漏
れたとしても電気ヒータが無いため着火する可能性が全
くない。Further, when R600a, which is a flammable refrigerant, is used, assuming that the refrigerant leaks into the refrigerator, the conventional electric heater capacity may be an ignition source and is dangerous. However, in the present embodiment, since the air in the refrigerator is used as a heat source for melting frost, even if refrigerant leaks into the refrigerator, there is no electric heater and there is no possibility of ignition.

【００４０】また、蒸発器４の霜を溶かすことにより冷
蔵室１６の温度の調整を行い、さらに湿度を高く維持す
ることが可能となり食品を鮮度良く保存することができ
る。Further, by melting the frost of the evaporator 4, the temperature of the refrigerating compartment 16 can be adjusted, and the humidity can be kept high, so that the food can be preserved with good freshness.

【００４１】なお本実施の形態では、絞り装置に毛細管
３を用いた例を説明したが、これに限るものではなく、
電気信号により開度を任意に調整できる電子式膨張弁で
もよい。In this embodiment, the example in which the capillary tube 3 is used as the diaphragm device has been described, but the invention is not limited to this.
An electronic expansion valve whose opening can be arbitrarily adjusted by an electric signal may be used.

【００４２】実施の形態２．以下、この発明の実施の形
態２を図面を参照して説明する。図７，８は実施の形態
２を示す図で、図７は冷凍冷蔵庫の側面断面図、図８は
冷凍冷蔵庫の制御タイミングチャート図である。尚、冷
媒回路構成は実施の形態１で説明した図２と同様であ
る。図において、１は圧縮機、２は凝縮器、３は絞り装
置である毛細管、４は蒸発器、５は負荷変動時などに発
生する余剰冷媒をためるヘッダーであり、これらは順次
配管で接続され冷凍サイクルを形成している。この冷凍
サイクルの冷媒には地球温暖化に非常に影響が小さい炭
化水素系冷媒Ｒ６００ａを用いている。Embodiment 2. Embodiment 2 of the present invention will be described below with reference to the drawings. 7 and 8 are views showing the second embodiment, FIG. 7 is a side sectional view of a refrigerator-freezer, and FIG. 8 is a control timing chart diagram of the refrigerator-freezer. The refrigerant circuit configuration is the same as that of FIG. 2 described in the first embodiment. In the figure, 1 is a compressor, 2 is a condenser, 3 is a capillary tube which is a throttle device, 4 is an evaporator, 5 is a header for storing excess refrigerant generated when the load fluctuates, and these are sequentially connected by piping. Forming a refrigeration cycle. As the refrigerant for this refrigeration cycle, a hydrocarbon-based refrigerant R600a that has a very small effect on global warming is used.

【００４３】１５は冷凍室、１６は冷蔵室、２０は野菜
室、１０は冷凍室庫内温度検出手段、２１は冷蔵室庫内
温度検出手段、４は蒸発器、１１は空気循環手段、１２
は冷凍室への冷気循環制御手段である冷凍室の空気循環
制御手段、１３は冷蔵室への冷気循環制御手段である冷
蔵室の空気循環制御手段、１９は冷蔵室送風ダクト、１
８ａ〜１８ｄは冷蔵室空気吹き出し口、２５ａ，２５ｂ
は冷蔵室空気吸込み口、２６ａ〜２６ｃは野菜室空気吹
き出し口、２７ａ，２７ｂは野菜室空気吸込み口、２８
は空気の野菜室から蒸発器への庫内空気戻りダクト、４
４は冷凍室空気吸込み口である。Reference numeral 15 is a freezing compartment, 16 is a refrigerating compartment, 20 is a vegetable compartment, 10 is a freezing compartment internal temperature detecting means, 21 is a refrigerating compartment internal temperature detecting means, 4 is an evaporator, 11 is an air circulating means, 12
Is an air circulation control means for the freezing compartment which is a cooling air circulation control means for the freezing compartment, 13 is an air circulation control means for the refrigeration compartment which is a cooling air circulation control means for the refrigeration compartment, 19 is a refrigeration compartment air duct, 1
8a to 18d are air outlets for the refrigerating room, and 25a and 25b.
Is a refrigerator compartment air inlet, 26a to 26c are vegetable compartment air outlets, 27a and 27b are vegetable compartment air inlets, 28
Is an internal air return duct from the vegetable compartment to the evaporator, 4
Reference numeral 4 is an air inlet of the freezer.

【００４４】冷蔵室の空気循環制御手段１３は冷蔵室１
６内に設置された冷蔵室庫内温度検知手段２１により検
知された冷蔵室庫内温度が予めコントローラ２３内に記
憶されている設定値より高い場合に開けられ冷蔵室１６
に蒸発器４からの空気を導入可能とする。また、設定値
より低い場合は、冷蔵室の空気循環制御手段１３を閉じ
蒸発器４から冷蔵室１６への空気の導入を遮断する。さ
らに、圧縮機１の停止をコントローラ２３が検知すると
冷蔵室の空気循環制御手段１３は開の状態になるように
制御する。The air circulation control means 13 of the refrigerating compartment is the refrigerating compartment 1
6 is opened when the temperature inside the refrigerating compartment detected by the refrigerating compartment inside temperature detecting means 21 installed in 6 is higher than a preset value stored in the controller 23 in advance.
The air from the evaporator 4 can be introduced into. On the other hand, when the temperature is lower than the set value, the air circulation control means 13 in the refrigerating compartment is closed to shut off the introduction of air from the evaporator 4 into the refrigerating compartment 16. Further, when the controller 23 detects the stop of the compressor 1, the air circulation control means 13 in the refrigerating room controls so as to be opened.

【００４５】空気循環手段１１は冷凍室の空気循環制御
手段１２もしくは冷蔵室の空気循環制御手段１３のどち
らか一方が開いた場合に通電され作動し、冷凍室の空気
循環制御手段１２および冷蔵室の空気循環制御手段１３
の両方が閉じた場合に停止する。The air circulation means 11 is energized and operated when either the air circulation control means 12 of the freezing compartment or the air circulation control means 13 of the refrigerating compartment is opened, and the air circulation control means 12 of the freezing compartment and the refrigerating compartment Air circulation control means 13
Will stop if both are closed.

【００４６】冷凍室の空気循環制御手段１２、圧縮機１
は実施の形態１と同様に制御されているため説明を省略
する。Air circulation control means 12 in the freezer compartment, compressor 1
Is controlled in the same manner as in the first embodiment, and therefore its explanation is omitted.

【００４７】以上のように構成、制御された冷蔵庫の動
作を図８のタイミングチャートで説明する。時間ｔ４に
おいて、冷凍室内に設置してある冷凍室庫内温度検知手
段１０により検知された温度がコントローラ２３内に予
め記憶されている設定値より小さくなったため、冷凍室
の空気循環制御手段１２を閉じ、圧縮機１を停止させ
る。The operation of the refrigerator configured and controlled as above will be described with reference to the timing chart of FIG. At time t4, the temperature detected by the freezer compartment internal temperature detecting means 10 installed in the freezer compartment becomes lower than the preset value stored in the controller 23 in advance, so that the air circulation control means 12 of the freezer compartment is turned on. Close and stop compressor 1.

【００４８】一方、冷蔵室の空気循環制御手段１３はコ
ントローラ２３内記憶してある冷蔵室設定温度より低い
が、圧縮機１が停止したことを検知し冷蔵室の空気循環
制御手段１３は開の状態となり、冷蔵室１６の冷却を開
始する。空気循環手段１１はそのまま継続し運転され
る。On the other hand, although the air circulation control means 13 for the refrigerating room is lower than the preset temperature of the refrigerating room stored in the controller 23, it is detected that the compressor 1 has stopped and the air circulation control means 13 for the refrigerating room is opened. Then, cooling of the refrigerating compartment 16 is started. The air circulation means 11 is continuously operated as it is.

【００４９】本実施の形態では圧縮機１が停止すると必
ず霜を溶かす運転となるため、常に蒸発器４の霜が小容
量に維持されるため冷却効率に優れており、省エネルギ
ー運転が実現される。さらに湿度を高く維持することが
可能となり食品を鮮度良く保存することができる。In the present embodiment, when the compressor 1 is stopped, the operation to melt the frost is always performed, so that the frost of the evaporator 4 is always maintained in a small capacity, so that the cooling efficiency is excellent and the energy saving operation is realized. . Furthermore, the humidity can be maintained high, and the food can be stored with good freshness.

【００５０】実施の形態３．以下、この発明の実施の形
態３を図面を参照して説明する。図９，１０は実施の形
態３を示す図で、図９は冷凍冷蔵庫の側面断面図、図１
０は冷凍冷蔵庫の制御タイミングチャート図である。
尚、冷媒回路構成は実施の形態１で説明した図２と同様
である。図において、１は圧縮機、２は凝縮器、３は絞
り装置である毛細管、４は蒸発器、５は負荷変動時など
に発生する余剰冷媒をためるヘッダーであり、これらは
順次配管で接続され冷凍サイクルを形成している。この
冷凍サイクルの冷媒には地球温暖化に非常に影響が小さ
い炭化水素系冷媒Ｒ６００ａを用いている。Embodiment 3. Embodiment 3 of the present invention will be described below with reference to the drawings. 9 and 10 are views showing a third embodiment, and FIG. 9 is a side sectional view of a refrigerator-freezer.
0 is a control timing chart of the refrigerator-freezer.
The refrigerant circuit configuration is the same as that of FIG. 2 described in the first embodiment. In the figure, 1 is a compressor, 2 is a condenser, 3 is a capillary tube which is a throttle device, 4 is an evaporator, 5 is a header for storing excess refrigerant generated when the load fluctuates, and these are sequentially connected by piping. Forming a refrigeration cycle. As the refrigerant for this refrigeration cycle, a hydrocarbon-based refrigerant R600a that has a very small effect on global warming is used.

【００５１】１５は冷凍室、１６は冷蔵室、２０は野菜
室、１０は冷凍室庫内温度検出手段、２１は冷蔵室庫内
温度検出手段、４は冷凍室用蒸発器、１１は冷凍室空気
循環手段、３１は冷蔵室用蒸発器、３２は冷蔵室の空気
循環手段、１８ａ〜１８ｄは冷蔵室空気吹き出し口、２
５ａ，２５ｂは冷蔵室空気吸込み口、２６ａ〜２６ｃは
野菜室空気吹き出し口、２７ａ，２７ｂは野菜室空気吸
込み口、２８は空気の野菜室から蒸発器への庫内空気戻
りダクト、４４は冷凍室空気吸込み口、４５は小容量電
気ヒータ、１４はカサ、４６は除霜時に発生したドレン
水を蒸発させるトレイ、４７はドレン水通水パイプ、４
８は蒸発器に設置された蒸発器温度検出手段である。Reference numeral 15 is a freezing compartment, 16 is a refrigerating compartment, 20 is a vegetable compartment, 10 is a freezing compartment internal temperature detecting means, 21 is a refrigerating compartment internal temperature detecting means, 4 is a freezing compartment evaporator, and 11 is a freezing compartment. Air circulation means, 31 is a refrigerating room evaporator, 32 is a refrigerating room air circulating means, 18a to 18d are refrigerating room air outlets, 2
5a and 25b are air inlets for the refrigerating compartment, 26a to 26c are air outlets for the vegetable compartment, 27a and 27b are air inlets for the vegetable compartment, 28 is an air return duct from the vegetable compartment to the evaporator, and 44 is a freezer. Room air suction port, 45 is a small capacity electric heater, 14 is a bulkhead, 46 is a tray for evaporating drain water generated during defrosting, 47 is a drain water passage pipe, 4
Reference numeral 8 is an evaporator temperature detecting means installed in the evaporator.

【００５２】冷凍室の空気循環制御手段１２、冷蔵室の
空気循環制御手段１３、空気循環手段１１および圧縮機
１は実施の形態１と同様に制御されているため詳細な説
明を省略する。The air circulation control means 12 for the freezing compartment, the air circulation control means 13 for the refrigerating compartment, the air circulation means 11 and the compressor 1 are controlled in the same manner as in the first embodiment, and detailed description thereof will be omitted.

【００５３】コントローラ２３内に予め記憶された圧縮
機積算運転時間の設定値より圧縮機運転積算時間が大き
くなったら、冷凍室の空気循環制御手段１２及び冷蔵室
の空気循環制御手段１３を閉じ、圧縮機１および空気循
環手段１１を停止した上で、小容量電気ヒータ４５に通
電を開始し、蒸発器４に設置された蒸発器温度検出手段
４８により予め設定されていた温度に到達すると通電を
終了するように制御されている。When the compressor cumulative operating time becomes longer than the preset compressor cumulative operating time stored in the controller 23, the freezing compartment air circulation control means 12 and the refrigeration compartment air circulation control means 13 are closed. After the compressor 1 and the air circulation means 11 are stopped, energization of the small capacity electric heater 45 is started, and energization is carried out when the temperature preset by the evaporator temperature detecting means 48 installed in the evaporator 4 is reached. It is controlled to finish.

【００５４】以上のように構成、制御された冷蔵庫の動
作を図１０のタイミングチャートで説明する。時間ｔ６
において、コントローラ２３内に予め記憶されている圧
縮機積算運転時間が設定値より大きくなったため、圧縮
機１および空気循環手段１１を停止し、冷凍室の空気循
環制御手段１２および冷蔵室の空気循環制御手段１３を
閉じる。また、コントローラ２３は小容量電気ヒータ４
５に通電を開始する。The operation of the refrigerator configured and controlled as described above will be described with reference to the timing chart of FIG. Time t6
In the above, since the compressor integrated operation time stored in advance in the controller 23 becomes larger than the set value, the compressor 1 and the air circulation means 11 are stopped, and the air circulation control means 12 of the freezer compartment and the air circulation means of the refrigerating compartment are stopped. The control means 13 is closed. Further, the controller 23 uses the small capacity electric heater 4
Energization is started to 5.

【００５５】時間ｔ７において、蒸発器４に設置されて
いる蒸発器温度検出手段４８は予めコントローラ２３内
に記憶してある設定温度以上となったため、小容量電気
ヒータ４５への通電を終了する。同時に、冷凍室庫内温
度および冷蔵室庫内温度とも設定値以上となり、圧縮機
１および空気循環手段１１が運転され冷蔵室の空気循環
制御手段１３および冷凍室の空気循環制御手段１２は開
けられ冷却運転を開始する。At time t7, the evaporator temperature detecting means 48 installed in the evaporator 4 exceeds the preset temperature stored in the controller 23 in advance, and the power supply to the small capacity electric heater 45 is terminated. At the same time, both the freezer compartment internal temperature and the refrigerating compartment internal temperature become equal to or higher than the preset values, the compressor 1 and the air circulating means 11 are operated, and the refrigerating compartment air circulation controlling means 13 and the freezing compartment air circulating controlling means 12 are opened. Start the cooling operation.

【００５６】本実施の形態では、冷蔵室１６の冷却に蒸
発器４に付着した霜の融解熱を利用しているため従来の
蒸発器に比べ、着霜量（付着した霜の量）が少ない。従
って、電気ヒータで除霜する場合のヒータ容量を従来の
ヒータ容量より少なくすることが可能であり、Ｒ６００
ａの着火温度以下の表面温度となる。In this embodiment, since the heat of fusion of frost attached to the evaporator 4 is used for cooling the refrigerating chamber 16, the amount of frost (the amount of frost attached) is smaller than that of the conventional evaporator. . Therefore, the heater capacity when defrosting with the electric heater can be made smaller than the conventional heater capacity.
The surface temperature is lower than the ignition temperature of a.

【００５７】また、従来の圧縮機積算運転時間の設定値
より大きくすることができることおよび電気ヒータを小
容量化できるため冷却効率に優れており、省エネルギー
運転が実現される。さらに蒸発器に付着した霜の融解熱
を利用した冷却を行なっているため、湿度を高く維持す
ることが可能となり食品を鮮度良く保存することができ
る。さらに、小容量電気ヒータを用いるため従来用いて
いた電気ヒータに比べコストを抑えることも可能とな
る。Further, since it is possible to make it larger than the set value of the conventional compressor integrated operation time and the capacity of the electric heater can be made small, the cooling efficiency is excellent and the energy saving operation is realized. Furthermore, since the cooling is performed by utilizing the heat of fusion of the frost attached to the evaporator, it is possible to maintain the humidity high, and the food can be stored with good freshness. Further, since a small capacity electric heater is used, it is possible to reduce the cost as compared with the electric heater used conventionally.

【００５８】実施の形態４．以下、この発明の実施の形
態４を図面を参照して説明する。図１１〜１３は実施の
形態４を示す図で、図１１は冷凍冷蔵庫の側面断面図、
図１２は冷凍冷蔵庫の冷媒回路図、図１３は冷凍冷蔵庫
の制御タイミングチャート図である。図１１において、
１５は冷凍室、１６は冷蔵室、２０は野菜室、１０は冷
凍室庫内温度検出手段、２１は冷蔵室庫内温度検出手
段、４は蒸発器、１１は空気循環手段、１２は冷凍室へ
の冷気循環制御手段である冷凍室の空気循環制御手段、
１３は冷蔵室への冷気循環制御手段である冷蔵室の空気
循環制御手段、１９は冷蔵室送風ダクト、１８ａ〜１８
ｄは冷蔵室空気吹き出し口、２５ａ，２５ｂは冷蔵室空
気吸込み口、２６ａ〜２６ｃは野菜室空気吹き出し口、
２７ａ，２７ｂは野菜室空気吸込み口、２８は空気の野
菜室から蒸発器への庫内空気戻りダクト、４４は冷凍室
空気吸込み口である。Fourth Embodiment Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. 11 to 13 are views showing the fourth embodiment, and FIG. 11 is a side sectional view of a refrigerator-freezer.
FIG. 12 is a refrigerant circuit diagram of the refrigerator-freezer, and FIG. 13 is a control timing chart diagram of the refrigerator-freezer. In FIG.
Reference numeral 15 is a freezing room, 16 is a refrigerating room, 20 is a vegetable room, 10 is a freezing room internal temperature detecting means, 21 is a cold room internal temperature detecting means, 4 is an evaporator, 11 is an air circulating means, and 12 is a freezing room. Air circulation control means of the freezing room, which is a cool air circulation control means to
Reference numeral 13 is an air circulation control means for the refrigerating room, which is a means for controlling the cold air to the refrigerating room, 19 is a refrigerating room air duct, and 18a to 18a.
d is a refrigerating room air outlet, 25a and 25b are refrigerating room air inlets, 26a to 26c are vegetable compartment air outlets,
27a and 27b are air inlets for the vegetable compartment, 28 is an air return duct for the air from the vegetable compartment to the evaporator, and 44 is an air inlet for the freezer.

【００５９】冷凍室の空気循環制御手段１２、冷蔵室の
空気循環制御手段１３、空気循環手段１１および圧縮機
１は実施の形態１と同様に制御されているため詳細な説
明を省略する。Since the air circulation control means 12 for the freezing compartment, the air circulation control means 13 for the refrigerating compartment, the air circulation means 11 and the compressor 1 are controlled in the same manner as in the first embodiment, detailed description will be omitted.

【００６０】冷凍サイクルの冷媒には地球温暖化に非常
に影響が小さい炭化水素系冷媒Ｒ６００ａを用いてい
る。図１２において、１は圧縮機、２は凝縮器、２２は
コントローラの指令により冷媒の流れを閉止することが
でき遮断弁、３は絞り装置である毛細管、４は蒸発器、
５は負荷変動時などに発生する余剰冷媒を貯めるヘッダ
ーであり、これらは配管によって接続され冷凍サイクル
を構成している。As the refrigerant of the refrigeration cycle, a hydrocarbon type refrigerant R600a having a very small effect on global warming is used. In FIG. 12, 1 is a compressor, 2 is a condenser, 22 is a shutoff valve capable of closing the flow of the refrigerant according to a command from a controller, 3 is a capillary tube which is a throttle device, 4 is an evaporator,
Reference numeral 5 is a header that stores excess refrigerant generated when the load changes, and these are connected by piping to form a refrigeration cycle.

【００６１】冷凍室庫内温度がコントローラ２３内に記
憶されている設定値以下になると直ちに、遮断弁２２が
冷媒回路を遮断するが圧縮機１はコントローラ２３内に
記憶された設定時間だけ遅れて停止するように制御され
ている。また、冷凍室庫内温度がコントローラ２３内に
記憶されている設定値以上になると直ちに、遮断弁２２
が冷媒回路を連通させ、その後圧縮機１が運転されるよ
うに制御されている。As soon as the temperature inside the freezer compartment becomes equal to or lower than the set value stored in the controller 23, the shutoff valve 22 shuts off the refrigerant circuit, but the compressor 1 is delayed by the set time stored in the controller 23. It is controlled to stop. Further, as soon as the temperature inside the freezer compartment becomes equal to or higher than the set value stored in the controller 23, the shutoff valve 22
Controls the refrigerant circuit to communicate with each other, and then the compressor 1 is controlled to operate.

【００６２】以上のように構成、制御された冷蔵庫の動
作を図１３のタイミングチャートで説明する。ｔ２にお
いて、冷凍室庫内温度が設定値以下になり冷凍室の空気
循環制御手段１３を閉じ、遮断弁２２が冷媒回路を遮断
し、設定時間だけ遅れて圧縮機１が停止する。The operation of the refrigerator configured and controlled as above will be described with reference to the timing chart of FIG. At t2, the temperature inside the freezer compartment becomes equal to or lower than the set value, the air circulation control means 13 of the freezer compartment is closed, the shutoff valve 22 shuts off the refrigerant circuit, and the compressor 1 is stopped after a set time delay.

【００６３】一方、冷蔵室の空気循環制御手段１３はコ
ントローラ２３内に予め記憶されている設定値より冷蔵
室温度が大きくなったことにより、冷蔵室の空気循環制
御手段１３を開け蒸発器４から冷蔵室用ダクト１９を連
通させる。野菜室２０からの空気は５〜７℃であるので
蒸発器４に付着した霜を溶かしながら蒸発器４と熱交換
する。On the other hand, the air circulation control means 13 for the refrigerating compartment opens the air circulation control means 13 for the refrigerating compartment from the evaporator 4 because the temperature of the refrigerating compartment has become higher than the preset value stored in the controller 23. The cold room duct 19 is communicated. Since the air from the vegetable compartment 20 has a temperature of 5 to 7 ° C., heat is exchanged with the evaporator 4 while melting the frost attached to the evaporator 4.

【００６４】遮断弁２２が冷媒回路を遮断した後に設定
時間遅れて圧縮機１が停止するため、蒸発器４内の液冷
媒を凝縮器２に移動させるため蒸発器４の熱容量は蒸発
器４そのものの熱容量と付着している霜の熱容量となる
ため霜を従来より少ないエネルギーで溶かすことが可能
であり、冷蔵庫に全く負荷をかけることがないため冷却
効率が向上する。Since the compressor 1 is stopped with a delay of a set time after the shutoff valve 22 shuts off the refrigerant circuit, the liquid refrigerant in the evaporator 4 is moved to the condenser 2 so that the heat capacity of the evaporator 4 is the evaporator 4 itself. Since the heat capacity of the frost and the heat capacity of the attached frost are the same, the frost can be melted with less energy than before, and the refrigerator is not loaded at all, and the cooling efficiency is improved.

【００６５】実施の形態５．以下、この発明の実施の形
態５を図面を参照して説明する。図１４〜１６は実施の
形態５を示す図で、図１４は冷凍冷蔵庫の側面断面図、
図１５，１６は冷凍冷蔵庫の冷媒回路図である。図１４
において、１５は冷凍室、１６は冷蔵室、２０は野菜
室、１０は冷凍室庫内温度検出手段、２１は冷蔵室庫内
温度検出手段、７４は冷凍室用蒸発器、６１は冷凍室空
気循環手段、３１は冷蔵室用蒸発器、３２は冷蔵室空気
循環手段、１８は冷蔵室空気吹き出し口、２５ａ，２５
ｂは冷蔵室空気吸込み口、２６ａ〜２６ｃは野菜室空気
吹き出し口、２７ａ，２７ｂは野菜室空気吸込み口であ
る。Embodiment 5. Embodiment 5 of the present invention will be described below with reference to the drawings. 14 to 16 are views showing a fifth embodiment, and FIG. 14 is a side sectional view of a refrigerator-freezer.
15 and 16 are refrigerant circuit diagrams of a refrigerator-freezer. 14
In the figure, 15 is a freezing room, 16 is a refrigerating room, 20 is a vegetable room, 10 is a freezing room internal temperature detecting means, 21 is a freezing room internal temperature detecting means, 74 is a freezing room evaporator, and 61 is freezing room air. Circulating means, 31 is a refrigerator evaporator, 32 is a refrigerator air circulating means, 18 is a refrigerator air outlet, and 25a, 25a.
Reference numeral b is a refrigerating room air intake port, 26a to 26c are vegetable room air blowing ports, and 27a and 27b are vegetable room air intake ports.

【００６６】冷蔵室空気循環手段３２は冷蔵室１６内に
設置された冷蔵室庫内温度検知手段２１により検知され
た冷蔵室庫内温度が予めコントローラ２３内記憶されて
いる設定値より高い場合に停止するように制御してい
る。The refrigerating compartment air circulation means 32 is provided when the refrigerating compartment interior temperature detected by the refrigerating compartment interior temperature detecting means 21 installed in the refrigerating compartment 16 is higher than a preset value stored in the controller 23 in advance. It is controlled to stop.

【００６７】冷凍室空気循環手段６１は、冷凍室１５内
に設置された冷凍室庫内温度検知手段１０により検知さ
れた冷凍室庫内温度が予めコントローラ２３内記憶され
ている設定値より高い場合に通電し作動させる。また、
設定値より低い場合は、停止させるように制御されてい
る。さらに、後述する除霜弁３４が第１バイパス流路３
５と冷凍室用蒸発器７４の入口配管が接続される流路に
切換えた場合は非通電とし停止させるように制御されて
いる。The freezer compartment air circulation means 61 is used when the freezer compartment temperature detected by the freezer compartment temperature detection means 10 installed in the freezer compartment 15 is higher than the preset value stored in the controller 23 in advance. Energize and operate. Also,
When it is lower than the set value, it is controlled to stop. Further, the defrost valve 34, which will be described later, is installed in the first bypass passage 3
5 and the inlet pipe of the evaporator 74 for the freezer compartment are switched to a non-energized state and stopped when switched to a flow path connected to the inlet pipe.

【００６８】圧縮機１は冷凍室１５内に設置された冷凍
室庫内温度検出手段１０および冷蔵室１６内に設置され
た冷蔵室庫内温度検知手段２１により検知された庫内温
度が、コントローラ内２３に記憶されている設定値より
高くなった場合に運転させ、設定値以下になったら停止
するように制御されている。さらに、後述する除霜弁３
４が第１バイパス流路３５と冷凍室用蒸発器７４の入口
配管が接続される流路に切換えた場合は運転するように
制御されている。In the compressor 1, the temperature inside the freezer compartment detected by the temperature detecting means 10 inside the freezer compartment 15 and the temperature detecting means 21 inside the refrigerating compartment inside the refrigerating compartment 16 are controlled by the controller. It is controlled to operate when the value becomes higher than the set value stored in 23, and to stop when the value becomes lower than the set value. Further, a defrost valve 3 described later
When 4 is switched to the flow path to which the first bypass flow path 35 and the inlet pipe of the freezer compartment evaporator 74 are connected, it is controlled to operate.

【００６９】冷凍サイクルの冷媒には地球温暖化に非常
に影響が小さい炭化水素系冷媒Ｒ６００ａを用いてい
る。図１５において、１は圧縮機、３５は冷凍室用蒸発
器７４の霜を溶かす場合に用いる第１バイパス流路、２
は凝縮器、３３はコントローラ２３の指令により冷媒の
流れを切換えかつ閉止することができる第１流路切換
弁、３ａは冷蔵室用絞り装置である毛細管、３ｂは冷凍
室用絞り装置である毛細管、３１は冷蔵室用蒸発器、３
４はコントローラ２３の指令により冷媒の流れを切換え
ることができる除霜弁、７４は冷凍室用蒸発器、５は負
荷変動時などに発生する余剰冷媒を貯めるヘッダーであ
り、これらは配管によって接続され冷凍サイクルを構成
している。As the refrigerant for the refrigeration cycle, the hydrocarbon refrigerant R600a, which has a very small effect on global warming, is used. In FIG. 15, 1 is a compressor, 35 is a first bypass flow path used when frost in the freezer compartment evaporator 74 is melted, 2
Is a condenser, 33 is a first flow path switching valve capable of switching and closing the flow of the refrigerant in response to a command from the controller 23, 3a is a capillary tube which is a refrigerating room expansion device, 3b is a freezing room expansion device , 31 are refrigerator evaporators, 3
Reference numeral 4 denotes a defrost valve capable of switching the flow of the refrigerant in response to a command from the controller 23, 74 denotes a freezer evaporator, and 5 denotes a header that stores excess refrigerant generated when the load fluctuates, and these are connected by piping. It constitutes a refrigeration cycle.

【００７０】第１流路切換弁３３は冷蔵室１６内に設置
された冷蔵室庫内温度検出手段２１により検知された庫
内温度が、コントローラ２３内に記憶されている設定値
より低くなったら流路を冷凍室用絞り装置である毛細管
３ｂに切換え、設定値より高くなったらコントローラ２
３内に予め設定された時間の後に冷蔵室用絞り装置であ
る毛細管３ａに流路を切換えるように制御されている。
また、圧縮機１が停止すると閉止するように制御されて
いる。The first flow path switching valve 33 is provided when the inside temperature of the refrigerator detected by the inside temperature detector 21 installed in the refrigerator 16 becomes lower than the set value stored in the controller 23. The flow path is switched to the capillary tube 3b, which is the expansion device for the freezing room, and when it becomes higher than the set value, the controller 2
After a preset time in 3, the flow path is controlled to switch to the capillary tube 3a which is the refrigerating chamber expansion device.
Further, the compressor 1 is controlled so as to close when it stops.

【００７１】除霜弁３４は冷蔵室内に設置された冷蔵室
庫内温度検出手段２１により検知された庫内温度が、コ
ントローラ２３内に記憶されている設定値より低くなっ
たら流路を冷凍室用絞り装置である毛細管３ｂと冷凍室
用蒸発器７４の入口配管を接続する流路に切換え、設定
値より高くなったら直ちに冷蔵室用蒸発器３１の出口配
管と冷凍室用蒸発器７４の入口配管を接続する流路に切
換えるように制御されている。The defrost valve 34 opens the flow path when the inside temperature detected by the inside temperature detecting means 21 of the refrigerating room installed in the refrigerating room becomes lower than the set value stored in the controller 23. Switching to the flow path that connects the capillary tube 3b, which is the expansion device, and the inlet pipe of the freezer compartment evaporator 74, and immediately when it becomes higher than the set value, the outlet pipe of the refrigerator compartment evaporator 31 and the inlet of the freezer compartment evaporator 74 are immediately switched. It is controlled to switch to the flow path that connects the piping.

【００７２】また、コントローラ２３内に予め記憶され
た設定値と圧縮機１の実積算運転時間を比較し、運転積
算時間が設定値よりも大きい場合は第１バイパス流路３
５と冷凍室用蒸発器７４の入口配管が接続される流路に
切換えるように制御されている。The set value stored in advance in the controller 23 is compared with the actual integrated operating time of the compressor 1. If the integrated operating time is larger than the set value, the first bypass flow path 3
5 and the inlet pipe of the freezer compartment evaporator 74 are controlled so as to switch to a flow path connected to them.

【００７３】さらに、コントローラ２３内に予め記憶さ
れた設定値とヘッダー５に取り付けられた蒸発器温度検
出手段５４によって検知された温度が設定値よりも大き
くなった場合は第１バイパス流路３５と冷凍室用蒸発器
７４の入口配管の接続が解除されるように制御されてい
る。Further, if the set value stored in advance in the controller 23 and the temperature detected by the evaporator temperature detecting means 54 attached to the header 5 become higher than the set value, the first bypass flow path 35 is formed. It is controlled so that the connection of the inlet pipe of the freezer compartment evaporator 74 is released.

【００７４】以上のように構成、制御された冷蔵庫の除
霜運転時の動作を説明する。本実施の形態の冷蔵庫では
冷凍室庫内温度がコントローラ２３内に記憶されている
設定値より大きくなるとコントローラ２３内に記憶され
ている設定時間の後に、第１流路切換弁３３が冷媒流路
を冷蔵室用絞り装置である毛細管３ａと接続するため冷
蔵室用蒸発器３１には設定時間の間は冷媒が流れ込まな
い。冷蔵室用蒸発器３１用の冷蔵室空気循環手段３２は
コントローラ２３の指令により運転されるため、冷蔵室
１６内の空気が野菜室２０を通過し、５〜７℃の空気と
して蒸発器４に流れ込む。その空気と蒸発器４が熱交換
を行い、蒸発器４に付着した霜を溶かすことが可能とな
る。The operation of the refrigerator configured and controlled as described above during the defrosting operation will be described. In the refrigerator of the present embodiment, when the temperature inside the freezer compartment becomes higher than the set value stored in the controller 23, the first flow path switching valve 33 causes the refrigerant flow path to flow after the set time stored in the controller 23. Is connected to the capillary tube 3a which is a refrigerating room squeezing device, the refrigerant does not flow into the refrigerating room evaporator 31 during the set time. Since the refrigerating compartment air circulating means 32 for the refrigerating compartment evaporator 31 is operated according to a command from the controller 23, the air in the refrigerating compartment 16 passes through the vegetable compartment 20 and is supplied to the evaporator 4 as air at 5 to 7 ° C. Pour in. The air and the evaporator 4 exchange heat with each other, so that the frost attached to the evaporator 4 can be melted.

【００７５】一方、冷凍室用蒸発器７４はコントローラ
２３内に予め記憶された設定値と圧縮機１の実積算運転
時間を比較し、運転積算時間が設定値よりも大きくなっ
た場合に、第１バイパス流路３５と冷凍室用蒸発器７４
の入口配管が接続される流路に切換えられ、圧縮機１か
ら吐出された高温冷媒が流れ込み、冷凍室用蒸発器７４
に付着した霜を溶かすため短時間で終了し、かつ冷凍サ
イクルを利用するため低入力で行うことができ、冷凍室
用蒸発器７４内部から加熱するため冷蔵庫への熱負荷も
非常に小さく抑えることができる。On the other hand, the evaporator 74 for the freezer compartment compares the preset value stored in the controller 23 with the actual cumulative operating time of the compressor 1, and when the cumulative operating time becomes larger than the preset value, 1 Bypass flow path 35 and evaporator 74 for freezer
Is switched to the flow path to which the inlet pipe of the compressor 1 is connected, the high-temperature refrigerant discharged from the compressor 1 flows in, and the evaporator 74 for the freezer compartment
It can be completed in a short time to melt the frost adhering to the refrigerator, and it can be performed with a low input because the refrigeration cycle is used. Since it is heated from the inside of the freezer compartment evaporator 74, the heat load on the refrigerator can be kept very small. You can

【００７６】更に可燃性冷媒であるＲ６００ａを用いた
場合冷蔵庫内に冷媒が漏れた場合を想定すると電気ヒー
タは着火源となり得る可能性があり非常に危険である。
しかし、本実施の形態では冷蔵庫内の空気と冷凍サイク
ル（圧縮機）を熱源とするため万一冷蔵庫内に冷媒が漏
れたとしても電気ヒータが無いため着火する可能性が非
常に低く安全である。Furthermore, when R600a which is a flammable refrigerant is used and the refrigerant leaks into the refrigerator, the electric heater may be an ignition source, which is very dangerous.
However, in the present embodiment, since the air in the refrigerator and the refrigeration cycle (compressor) are used as heat sources, even if refrigerant leaks into the refrigerator, there is no electric heater, so there is a very low possibility of ignition and it is safe. .

【００７７】また、冷蔵室１６は冷蔵室室用蒸発器３１
の霜を溶かすことにより冷蔵室１６の温度の調整を行
い、さらに湿度を高く維持することが可能となり食品を
鮮度良く保存することができる。Further, the refrigerating compartment 16 is the evaporator 31 for the refrigerating compartment.
It is possible to adjust the temperature of the refrigerating compartment 16 by melting the frost and to keep the humidity high, so that the food can be stored with good freshness.

【００７８】なお本実施の形態では、絞り装置を毛細管
で構成し、第１流路切換弁を用いた場合の例で説明した
が、これに限るものではなく、図１６に示すように電気
信号により開度を任意に調整できる電子式膨張弁をそれ
ぞれ２個使用してもよい。In the present embodiment, the case where the expansion device is formed of a capillary tube and the first flow path switching valve is used has been described as an example. However, the present invention is not limited to this, and an electric signal as shown in FIG. 16 is used. Two electronic expansion valves each of which can be arbitrarily adjusted in opening degree by means of may be used.

【００７９】実施の形態６．以下、この発明の実施の形
態６を図面を参照して説明する。図１７〜２１は実施の
形態６を示す図で、図１７は冷凍冷蔵庫の側面断面図、
図１８は冷凍冷蔵庫の冷媒回路図、図１９は冷凍冷蔵庫
の冷蔵室用蒸発器の除霜時における冷媒の流れを表す冷
媒回路図、図２０は冷凍冷蔵庫の冷凍室用蒸発器の除霜
時における冷媒の流れを表す冷媒回路図、図２１は冷凍
冷蔵庫の冷媒回路図である。図１７において、１５は冷
凍室、１６は冷蔵室、２０は野菜室、１０は冷凍室庫内
温度検出手段、２１は冷蔵室庫内温度検出手段、７４は
冷凍室用蒸発器、６１は冷凍室空気循環手段、３１は冷
蔵室用蒸発器、３２は冷蔵室空気循環手段、１８は冷蔵
室空気吹き出し口、２５ａ，２５ｂは冷蔵室空気吸込み
口、２６ａ〜２６ｃは野菜室空気吹き出し口、２７ａ，
２７ｂは野菜室空気吸込み口である。Sixth Embodiment Embodiment 6 of the present invention will be described below with reference to the drawings. 17 to 21 are views showing the sixth embodiment, and FIG. 17 is a side sectional view of a refrigerator-freezer.
FIG. 18 is a refrigerant circuit diagram of a freezer-refrigerator, FIG. 19 is a refrigerant circuit diagram showing a flow of a refrigerant when defrosting a refrigerator compartment evaporator of a freezer-refrigerator, and FIG. 20 is defrosting a freezer compartment evaporator of a refrigerator-freezer. FIG. 21 is a refrigerant circuit diagram showing the flow of the refrigerant in FIG. 21, and FIG. 21 is a refrigerant circuit diagram of the refrigerator-freezer. In FIG. 17, 15 is a freezing room, 16 is a refrigerating room, 20 is a vegetable room, 10 is a freezing room internal temperature detecting means, 21 is a cold room internal temperature detecting means, 74 is a freezing room evaporator, and 61 is a freezing room. Room air circulation means, 31 is a refrigerator compartment evaporator, 32 is a refrigeration room air circulation means, 18 is a refrigeration room air outlet, 25a and 25b are refrigeration room air inlets, 26a to 26c are vegetable compartment air outlets, and 27a. ，
27b is an air inlet for the vegetable compartment.

【００８０】冷蔵室空気循環手段３２は冷蔵室１６内に
設置された冷蔵室庫内温度検知手段２１により検知され
た冷蔵室庫内温度が予めコントローラ２３内記憶されて
いる設定値より高い場合に停止するように制御してい
る。The refrigerating compartment air circulation means 32 is provided when the refrigerating compartment interior temperature detected by the refrigerating compartment interior temperature detecting means 21 installed in the refrigerating compartment 16 is higher than the preset value stored in the controller 23 in advance. It is controlled to stop.

【００８１】冷凍室空気循環手段６１は、冷凍室１５内
に設置された冷凍室庫内温度検知手段１０により検知さ
れた冷凍室庫内温度が予めコントローラ２３内記憶され
ている設定値より高い場合に通電し作動させる。また、
設定値より低い場合は、停止させるように制御されてい
る。さらに、後述する除霜弁３４が第１バイパス流路３
５と冷凍室用蒸発器７４の入口配管が接続される流路に
切換えた場合は非通電とし停止させるように制御されて
いる。When the freezer compartment air circulation means 61 has a freezer compartment temperature detected by the freezer compartment temperature detection means 10 installed in the freezer compartment 15 higher than a preset value stored in the controller 23 in advance. Energize and operate. Also,
When it is lower than the set value, it is controlled to stop. Further, the defrost valve 34, which will be described later, is installed in the first bypass passage 3
5 and the inlet pipe of the evaporator 74 for the freezer compartment are switched to a non-energized state and stopped when switched to a flow path connected to the inlet pipe.

【００８２】圧縮機１は冷凍室１５内に設置された冷凍
室庫内温度検出手段１０および冷蔵室１６内に設置され
た冷蔵室庫内温度検知手段２１により検知された庫内温
度が、コントローラ内２３に記憶されている設定値より
高くなった場合に運転させ、設定値以下になったら停止
するように制御されている。さらに、後述する除霜弁３
４が第１バイパス流路３５と冷凍室用蒸発器７４の入口
配管が接続される流路に切換えた場合は運転するように
制御されている。In the compressor 1, the temperature inside the freezer compartment detected by the temperature detecting means 10 inside the freezer compartment 15 and the temperature detecting means 21 inside the refrigerating compartment inside the refrigerating compartment 16 are controlled by the controller. It is controlled to operate when the value becomes higher than the set value stored in 23, and to stop when the value becomes lower than the set value. Further, a defrost valve 3 described later
When 4 is switched to the flow path to which the first bypass flow path 35 and the inlet pipe of the freezer compartment evaporator 74 are connected, it is controlled to operate.

【００８３】また、図１８において、３６は第３流路切
換弁、３７は第４流路切換弁、３８は冷蔵室用蒸発器３
１と冷凍室用蒸発器７４とを圧力損失なしに接続する第
１接続配管、３９は第２絞り装置である毛細管、４０は
冷凍室用蒸発器７４と冷蔵室用蒸発器３１とを圧力損失
なしに接続する第２接続配管、４１は第３絞り装置であ
る毛細管、４２は第２バイパス配管、５０は除霜弁３４
と冷蔵室用蒸発器３１入口配管を接続する第３接続配
管、５１は除霜弁３４と冷凍室用蒸発器７４入口配管を
接続する第４接続配管である。この冷凍サイクルの冷媒
には地球温暖化に非常に影響が小さい炭化水素系冷媒Ｒ
６００ａを用いている。Further, in FIG. 18, 36 is a third flow passage switching valve, 37 is a fourth flow passage switching valve, and 38 is a refrigerator compartment evaporator 3.
1 is a first connecting pipe for connecting the freezer compartment evaporator 74 to each other without pressure loss, 39 is a capillary tube as a second expansion device, 40 is a pressure loss between the freezer compartment evaporator 74 and the refrigerating compartment evaporator 31. No. 2 connection pipe connected without connection, 41 is a capillary tube that is a third expansion device, 42 is a second bypass pipe, 50 is a defrost valve 34
And a refrigerating room evaporator 31 inlet pipe connecting the third connecting pipe, and 51 a defrosting valve 34 and a freezing room evaporator 74 inlet pipe connecting the fourth connecting pipe. The refrigerant of this refrigeration cycle is a hydrocarbon-based refrigerant R that has a very small effect on global warming.
600a is used.

【００８４】第３流路切換弁３６は通常冷却運転時は冷
蔵室用蒸発器３１出口と第１接続配管３８と接続した状
態になっている。冷蔵室用蒸発器３１に付着した霜を溶
かす場合は、冷蔵室用蒸発器３１出口と第２絞り装置で
ある毛細管３９を接続するように流路を切換えるように
制御されている。また、冷凍室用蒸発器４に付着した霜
を溶かす場合は、冷蔵室用蒸発器３１出口とバイパス配
管４２を接続するように流路を切換えるよう制御されて
いる。The third flow path switching valve 36 is in a state of being connected to the outlet 31 of the refrigerator compartment evaporator 31 and the first connecting pipe 38 during the normal cooling operation. When the frost attached to the refrigerator compartment evaporator 31 is melted, the flow path is controlled so as to connect the outlet of the refrigerator room evaporator 31 and the capillary tube 39 serving as the second expansion device. Further, when the frost attached to the freezer compartment evaporator 4 is melted, the flow path is controlled so as to connect the outlet of the refrigerator room evaporator 31 and the bypass pipe 42.

【００８５】第４流路切換弁３７は通常冷却運転時は冷
凍室用蒸発器７４出口とヘッダー５入口配管と接続した
状態になっている。冷凍室用蒸発器７４に付着した霜を
溶かす場合は、冷凍室用蒸発器７４出口と第３絞り装置
である毛細管４１を接続するように流路を切換えるよう
に制御されている。また、冷蔵室用蒸発器３１に付着し
た霜を溶かす場合は冷凍室用蒸発器７４出口とヘッダー
５入口配管を接続するように流路を切換えるように制御
されている。The fourth flow path switching valve 37 is in a state of being connected to the outlet 74 of the evaporator 74 for the freezer and the header 5 inlet pipe during the normal cooling operation. When the frost attached to the freezer compartment evaporator 74 is melted, the flow path is controlled so as to connect the outlet of the freezer compartment evaporator 74 and the capillary 41 as the third expansion device. Further, when the frost attached to the refrigerator compartment evaporator 31 is melted, the flow path is controlled so as to connect the outlet of the freezer compartment evaporator 74 and the header 5 inlet pipe.

【００８６】以上のように構成、制御された本実施の形
態の冷蔵庫の除霜運転時の動作について、図１９を用い
て先ず冷蔵室用蒸発器３１の場合について説明する。第
１流路切換弁３３は閉止の状態とし、除霜弁３４によ
り、第３接続配管５０と第１バイパス流路３５が接続さ
れる。第３流路切換弁３６は冷蔵室用蒸発器３１出口と
第２絞り装置である毛細管３９を接続し、第４流路切換
弁３７は冷凍室用蒸発器７４出口とヘッダー５入口配管
を接続する。The operation during the defrosting operation of the refrigerator of the present embodiment configured and controlled as described above will be described first with reference to FIG. 19 in the case of the refrigerator compartment evaporator 31. The first flow path switching valve 33 is closed, and the defrost valve 34 connects the third connection pipe 50 and the first bypass flow path 35. The third flow path switching valve 36 connects the evaporator 31 outlet for the refrigerating compartment and the capillary tube 39 that is the second expansion device, and the fourth flow path switching valve 37 connects the evaporator 74 outlet for the freezing compartment and the header 5 inlet pipe. To do.

【００８７】従って、圧縮機１から吐出された高温高圧
の蒸気冷媒は冷蔵室用蒸発器３１で冷蔵室用蒸発器３１
に付着した霜により冷却され凝縮し、冷蔵室用蒸発器３
１に付着した霜は冷媒から熱を奪い溶ける。さらに凝縮
液化した冷媒は第２絞り装置である毛細管３９を通過し
減圧され低圧二相冷媒となり、冷凍室用蒸発器７４に流
れ込む。そこで、低圧二相冷媒は冷凍室１５から熱を奪
い蒸発気化しヘッダー５を介して低圧蒸気冷媒として圧
縮機１に流れ込む。Therefore, the high-temperature and high-pressure vapor refrigerant discharged from the compressor 1 is stored in the refrigerator compartment evaporator 31 by the refrigerator compartment evaporator 31.
It is cooled and condensed by the frost attached to the refrigerator 3
The frost adhering to 1 draws heat from the refrigerant and melts. Further, the condensed and liquefied refrigerant passes through the capillary tube 39, which is the second expansion device, is reduced in pressure to become a low-pressure two-phase refrigerant, and flows into the freezer compartment evaporator 74. Therefore, the low-pressure two-phase refrigerant takes heat from the freezer compartment 15 to be evaporated and vaporized, and flows into the compressor 1 via the header 5 as a low-pressure vapor refrigerant.

【００８８】次に図２０を用いて冷凍室用蒸発器７４の
場合について説明する。第１流路切換弁は閉止の状態と
し、除霜弁３４は第４接続配管５１と第１バイパス流路
３５を接続する。第３流路切換弁３６は冷蔵室用蒸発器
３１出口と第２バイパス配管４２を接続し、第４流路切
換弁３７は冷凍室用蒸発器７４出口と第３絞り装置であ
る毛細管４１を接続する。Next, the case of the freezer compartment evaporator 74 will be described with reference to FIG. The first flow path switching valve is closed, and the defrost valve 34 connects the fourth connection pipe 51 and the first bypass flow path 35. The third flow path switching valve 36 connects the refrigerating compartment evaporator 31 outlet and the second bypass pipe 42, and the fourth flow path switching valve 37 connects the freezing compartment evaporator 74 outlet and the capillary 41 that is the third expansion device. Connecting.

【００８９】従って、圧縮機１から吐出された高温高圧
の蒸気冷媒は冷凍室用蒸発器７４で冷凍室用蒸発器７４
に付着した霜から冷却され凝縮し、冷凍室用蒸発器７４
に付着した霜は冷媒から熱を奪い溶ける。さらに凝縮液
化した冷媒は第３絞り装置である毛細管４１を通過し減
圧され低圧二相冷媒となり、冷蔵室用蒸発器３１に流れ
込む。そこで、低圧二相冷媒は冷蔵室１６から熱を奪い
蒸発気化しヘッダー５を介して低圧蒸気冷媒として圧縮
機１に流れ込む。Therefore, the high-temperature high-pressure vapor refrigerant discharged from the compressor 1 is transferred to the freezer compartment evaporator 74 by the freezer compartment evaporator 74.
It is cooled and condensed from the frost adhering to the freezer compartment evaporator 74.
The frost adhering to the heat sinks heat from the refrigerant and melts. Further, the condensed and liquefied refrigerant passes through the capillary 41, which is the third expansion device, is decompressed, becomes a low-pressure two-phase refrigerant, and flows into the refrigerator compartment evaporator 31. Therefore, the low-pressure two-phase refrigerant takes heat from the refrigerating chamber 16 to be evaporated and vaporized, and flows into the compressor 1 via the header 5 as a low-pressure vapor refrigerant.

【００９０】除霜時は上記のように冷媒回路が動作する
ため冷蔵室用蒸発器３１、冷凍室用蒸発器７４の除霜時
間は短時間で終了し、かつ冷凍サイクル（冷媒の相変
化）を利用するため低入力で行うことができ、蒸発器内
部から加熱するため冷蔵庫への熱負荷も非常に小さく抑
えることができる。さらに、除霜運転を行ないながら、
除霜を行なっていない蒸発器では冷却運転ができエネル
ギー効率が非常に良い。さらに、圧縮機１へ液冷媒が戻
ることが無く、圧縮機１に対する信頼性も向上させるこ
とができる。Since the refrigerant circuit operates as described above during defrosting, the defrosting time of the refrigerator compartment evaporator 31 and the freezing compartment evaporator 74 ends in a short time, and the refrigeration cycle (phase change of the refrigerant). Since it is used, it can be performed with a low input, and since it is heated from inside the evaporator, the heat load on the refrigerator can be suppressed to a very small level. Furthermore, while performing the defrosting operation,
The evaporator that is not defrosted can perform cooling operation and is very energy efficient. Furthermore, the liquid refrigerant does not return to the compressor 1, and the reliability of the compressor 1 can be improved.

【００９１】可燃性冷媒であるＲ６００ａを用いた場合
冷蔵庫内に冷媒が漏れた場合を想定すると電気ヒータは
着火源となり得る可能性があり非常に危険である。しか
し、本実施の形態では冷蔵庫内の空気と冷凍サイクル
（圧縮機）を熱源とするため万一冷蔵庫内に冷媒が漏れ
たとしても電気ヒータが無いため着火する可能性が非常
に低く安全である。When R600a which is a flammable refrigerant is used, assuming that the refrigerant leaks into the refrigerator, the electric heater may be an ignition source and is very dangerous. However, in the present embodiment, since the air in the refrigerator and the refrigeration cycle (compressor) are used as heat sources, even if refrigerant leaks into the refrigerator, there is no electric heater, so there is a very low possibility of ignition and it is safe. .

【００９２】なお本実施の形態では、冷凍室、冷蔵室用
絞り装置として毛細管と、第１切換弁を用いた場合の例
で説明したが、これに限るものではなく、図２１に示す
ように電気信号により開度を任意に調整できる電子式膨
張弁をそれぞれ２個使用してもよい。In the present embodiment, an example in which the capillaries and the first switching valve are used as the expansion device for the freezer compartment and the refrigerator compartment has been described, but the present invention is not limited to this, and as shown in FIG. Two electronic expansion valves each of which can arbitrarily adjust the opening degree by an electric signal may be used.

【００９３】さらに本実施の形態では、第１接続配管３
８、第２絞り装置である毛細管３９および第２接続配管
４０、第３絞り装置である毛細管４１を用いた場合の例
で説明したが、これに限るものではなく、図２１に示し
たように電気信号により開度を任意に調整できる電子式
膨張弁をそれぞれ２個使用してもよい。Further, in the present embodiment, the first connecting pipe 3
8, the case of using the capillary tube 39 and the second connecting pipe 40 which is the second expansion device, and the capillary tube 41 which is the third expansion device has been described, but the present invention is not limited to this, and as shown in FIG. Two electronic expansion valves each of which can arbitrarily adjust the opening degree by an electric signal may be used.

【００９４】また、実施の形態１から実施の形態６で
は、冷媒として炭化水素冷媒Ｒ６００ａ（イソブタン）
を用いた場合について説明したがこれに限ることなく、
Ｒ６００（ブタン）やＲ２９０（プロパン）などの炭化
水素冷媒やアンモニアなどの自然冷媒、あるいはこれら
の混合冷媒であってもよい。また、Ｒ１３４ａ、Ｒ３２
やＲ１５２ａなどの地球温暖化係数の小さなＨＦＣ系フ
ロン冷媒、あるいはそれらの混合冷媒であってもよい。In the first to sixth embodiments, the hydrocarbon refrigerant R600a (isobutane) is used as the refrigerant.
Although the case of using is described, the invention is not limited to this.
It may be a hydrocarbon refrigerant such as R600 (butane) or R290 (propane), a natural refrigerant such as ammonia, or a mixed refrigerant thereof. Also, R134a and R32
It may be an HFC-based CFC refrigerant having a small global warming potential, such as R152a or R152a, or a mixed refrigerant thereof.

【００９５】さらに、実施の形態１から実施の形態６で
用いられる冷凍機油について特に明示していないが、鉱
油やアルキルベンゼン、エステル油、エーテル油、ＰＡ
Ｇ油などの合成油であってもよい。Further, although the refrigerating machine oil used in the first to sixth embodiments is not specified, mineral oil, alkylbenzene, ester oil, ether oil, PA
It may be a synthetic oil such as G oil.

【００９６】さらに、実施の形態１から実施の形態６で
用いられている圧縮機について特に明示していないが、
レシプロ式、ロータリー式、スクロール式などであれば
良く、圧縮機内の圧力を高圧に保持した高圧シェルタイ
プもしくは圧縮機内の圧力を低圧に保持した低圧シェル
タイプのいずれのタイプでも良い。Further, although the compressors used in the first to sixth embodiments are not specified,
It may be a reciprocating type, a rotary type, a scroll type, or the like, and may be either a high pressure shell type in which the pressure inside the compressor is kept high or a low pressure shell type in which the pressure inside the compressor is kept low.

【００９７】さらに、実施の形態１から実施の形態６で
用いられている凝縮器について特に明示していないが、
冷蔵庫の側壁に埋め込まれた銅配管と外板が接触した自
然対流式や送風手段を用いた強制対流式のいずれのタイ
プでも良い。Furthermore, although the condensers used in the first to sixth embodiments are not specified,
Either a natural convection type in which a copper pipe embedded in a side wall of a refrigerator and an outer plate are in contact with each other or a forced convection type using a blowing means may be used.

【００９８】[0098]

【発明の効果】この発明に係る冷凍冷蔵庫は、圧縮機、
凝縮器、絞り装置、蒸発器を冷媒配管により順次連結し
てなる冷凍サイクルと、冷蔵室に設けられた冷蔵室温度
検出手段と、冷凍室に設けられた冷凍室温度検出手段
と、冷蔵室温度検出手段により検知された冷蔵室庫内温
度と設定値とを比較し、冷蔵室への蒸発器からの空気の
循環を制御する冷蔵室の空気循環制御手段と、冷凍室温
度検出手段により検知された冷凍室庫内温度と設定値と
を比較し、冷凍室への蒸発器からの空気の循環を制御す
る冷凍室の空気循環制御手段と、冷蔵室、冷凍室等へ蒸
発器からの空気を循環させる空気循環手段と、を備え、
冷凍室の空気循環制御手段が冷凍室へ空気を搬送可能な
状態もしくは冷蔵室の空気循環制御手段が冷蔵室に空気
を搬送可能な状態である場合に空気循環手段を駆動さ
せ、圧縮機が停止すると共に、冷凍室の空気循環制御手
段が冷凍室に空気を搬送不可能な状態であり、冷蔵室の
温度が設定値より大きくなった場合に、冷蔵室の空気循
環制御手段が冷蔵室に空気を搬送可能な状態に制御され
るので、消費電力の低減効果が得られ、さらに電気ヒー
タを用いないで除霜ができる効果が得られる。The refrigerator / freezer according to the present invention comprises a compressor,
A refrigeration cycle in which a condenser, an expansion device, and an evaporator are sequentially connected by a refrigerant pipe, a refrigerating compartment temperature detecting means provided in the refrigerating compartment, a freezing compartment temperature detecting means provided in the refrigerating compartment, and a refrigerating compartment temperature. The temperature inside the refrigerating compartment detected by the detecting means is compared with the set value, and the air circulation control means of the refrigerating compartment controlling the circulation of the air from the evaporator to the refrigerating compartment and the freezing compartment temperature detecting means are detected. The freezer compartment temperature is compared with the set value, and the air circulation control means of the freezer compartment that controls the circulation of the air from the evaporator to the freezer compartment and the air from the evaporator to the refrigerator compartment, the freezer compartment, etc. And an air circulation means for circulating,
When the air circulation control means of the freezer compartment is in a state where it can convey air to the freezer compartment or the air circulation control means of the refrigerating compartment is in a state where it can convey air to the refrigerating compartment, the air circulation means is driven and the compressor is stopped. In addition, the freezer air circulation control hand
It is impossible to transfer air to the freezer compartment,
If the temperature exceeds the set value, the air circulation in the refrigerator compartment
The ring control means is controlled so that air can be transferred to the refrigerator compartment.
Since that, the power consumption reduction effect is obtained, the effect is obtained that can defrosting without further using an electric heater.

【００９９】[0099]

【０１００】 また、この発明に係る冷凍冷蔵庫は、冷
凍サイクルの冷媒に可燃性冷媒を使用し、蒸発器の除霜
用の電気ヒータとして、通電した場合に電気ヒータの表
面温度が可燃性冷媒の着火温度以下になる容量の電気ヒ
ータを備え、圧縮機積算運転時間が設定値より長くなっ
た場合に電気ヒータに通電するように制御するため蒸発
器の霜を完全に取り除く効果が得られる。[0100] In addition, the refrigerator according to the present invention, cold
Table of the electric heater when freeze using refrigerant flammable refrigerant cycle, as an electric heater for defrosting the evaporator, and energized
An electric heater with a capacity that keeps the surface temperature below the ignition temperature of the flammable refrigerant.
Since the electric heater is controlled to energize when the compressor integrated operating time becomes longer than the set value, the effect of completely removing the frost from the evaporator can be obtained.

【０１０１】 また、この発明に係る冷凍冷蔵庫は、凝
縮器と絞り装置との間に冷媒の流れを閉止することがで
きる遮断弁を設け、冷凍室温度検出手段の出力が予め設
定した値以下になった場合に遮断弁を閉止状態にし、圧
縮機を設定時間遅らせて停止させるように制御するた
め、蒸発器に液冷媒が少量しか存在せず蒸発器の熱容量
を小さくなり除霜時間が短縮され消費電力量が低減され
る効果が得られる。[0101] In addition, the refrigerator according to the present invention, coagulation
It is possible to close the flow of refrigerant between the compressor and the expansion device.
Shut-off valve is installed, and the output of the freezer temperature detection means is preset.
When the pressure falls below the specified value, shut off the shutoff valve and
Since the compressor is controlled so as to be stopped after delaying the set time , the evaporator has a small amount of liquid refrigerant, the heat capacity of the evaporator is reduced, the defrost time is shortened, and the power consumption is reduced. The effect is obtained.

【０１０２】[0102]

【０１０３】 また、この発明に係る冷凍冷蔵庫は、圧
縮機、凝縮器、流路切換弁を順次冷媒配管で接続し、流
路切換弁に絞り装置を並行に２つ接続し、一方の絞り装
置に一方の蒸発器を接続し、他方の絞り装置に除霜弁を
介して他方の蒸発器を接続し、一方の蒸発器の出口と前
記圧縮機からのバイパス流路とを除霜弁に接続した冷凍
サイクルと、冷蔵室に設けられた冷蔵室温度検出手段
と、冷凍室に設けられた冷凍室温度検出手段と、冷蔵室
へ一方の蒸発器からの空気を循環させる冷蔵室空気循環
手段と、冷凍室へ他方の蒸発器からの空気を循環させる
冷凍室空気循環手段と、を備え、流路切換弁は冷蔵室温
度検出手段が検出した冷蔵室温度が設定値より低くなっ
たら流路を他方の絞り装置に切換え、設定値より高くな
ったら所定時間後に一方の絞り装置に切換えると共に、
所定時間の間冷蔵室空気循環手段を運転して一方の蒸発
器の除霜を行い、圧縮機の運転積算時間が設定値よりも
大きくなった場合に、除霜弁をバイパス流路と他方の蒸
発器の入口が接続される流路に切換えて他方の蒸発器の
除霜を行うことにより、電気ヒータを用いずに除霜を行
なうことができる効果が得られる。さらに、冷媒の相変
化を利用して除霜するため消費電力量も低減できる効果
が得られる。[0103] Further, refrigerator according to the present invention, a compressor, a condenser, the flow path switching valve is connected with the sequential refrigerant pipe, two connect the throttle device in parallel to the flow path switching valve, one of the aperture instrumentation
One evaporator is connected to the storage unit, and the defrost valve is attached to the other expansion device.
Connect the other evaporator via the outlet of one evaporator and the front
A refrigeration cycle in which a bypass flow path from the compressor is connected to a defrost valve, and a refrigerating compartment temperature detecting means provided in the refrigerating compartment.
And a freezer compartment temperature detecting means provided in the freezer compartment, a refrigerating compartment air circulating means for circulating air from one evaporator to the refrigerating compartment, and a freezing compartment for circulating air from the other evaporator to the freezer compartment. Air circulation means, and the flow path switching valve is refrigerated room temperature
Temperature detected by the temperature detection means is lower than the set value.
Switch the flow path to the other throttle device
After that, switch to one diaphragm device after a predetermined time,
Evaporate one side by operating the refrigerating room air circulation means for a predetermined time
Defrost the compressor and make the accumulated operating time of the compressor more than the set value.
If it becomes large, defrost the valve to bypass the bypass flow path and the other side.
Switch to the flow path to which the inlet of the generator is connected and switch the other evaporator
By performing defrosting, the effect is obtained that can perform a defrosting without using an electric heater. Further, since the phase change of the refrigerant is used for defrosting, the effect of reducing the power consumption can be obtained.

【０１０４】また、絞り装置を毛細管としたので、コス
トを抑える効果が得られる。また、設置スペースの自由
度を大きくする効果がある。Further, since the diaphragm device is a capillary tube, the effect of suppressing the cost can be obtained. Moreover, there is an effect that the degree of freedom of the installation space is increased.

【０１０５】また、絞り装置と流路切換弁を連続的に開
度調整可能な流量制御弁としたため、蒸発器を効率良く
運転することができ、消費電力量を低減するする効果が
得られる。Further, since the throttle device and the flow path switching valve are flow rate control valves capable of continuously adjusting the opening degree, the evaporator can be operated efficiently and the effect of reducing the power consumption can be obtained.

【０１０６】 また、この発明に係る冷凍冷蔵庫は、圧
縮機、凝縮器、第１の流路切換弁を順次冷媒配管で接続
し、第１の流路切換弁に絞り装置を並行に２つ接続しそ
れぞれの絞り装置に第１、第２の蒸発器を接続し、第
１、第２の蒸発器の出口にそれぞれ第３、第４の流路切
換弁を接続し、第３の流路切換弁に第２の蒸発器の入口
に接続する第１接続配管及び第２絞り装置と圧縮機の吸
入側に接続する第２バイパス流路とを接続し、第４の流
路切換弁に第１の蒸発器の入口に接続する第２接続配管
及び第３絞り装置を接続し、第１、第２の蒸発器の入口
に圧縮機からの第１バイパス流路が接続された除霜弁か
らの配管を接続した冷凍サイクルと、冷蔵室に設けられ
た冷蔵室温度検出手段と、冷凍室に設けられた冷凍室温
度検出手段と、冷蔵室へ一方の蒸発器からの空気を循環
させる冷蔵室空気循環手段と、冷凍室へ他方の蒸発器か
らの空気を循環させる冷凍室空気循環手段と、を備え、
第１の蒸発器の除霜時、第１の流路切換弁を閉じ、除霜
弁により第１バイパス流路と第１の蒸発器の入口が連通
して第１の蒸発器が凝縮器、第２の蒸発器が蒸発器とな
るサイクルを構成し、第２の蒸発器の除霜時、第１の流
路切換弁を閉じ、除霜弁により第１バイパス流路と第２
の蒸発器の入口が連通して第２の蒸発器が凝縮器、第１
の蒸発器が蒸発器となるサイクルを構成することによ
り、除霜運転中も冷却運転を行なうことができる効果が
得られる。さらに、冷凍サイクルの廃熱を利用して除霜
を行うために冷凍冷蔵庫の消費電力量を大幅に低減する
効果が得られる。Further, in the refrigerator / freezer according to the present invention, the compressor, the condenser, and the first flow path switching valve are sequentially connected by the refrigerant pipe, and two throttle devices are connected in parallel to the first flow path switching valve. and connecting the first, second evaporator to the respective throttle device, first
At the outlets of the 1st and 2nd evaporators, the 3rd and 4th passages are cut off respectively.
A switching valve is connected, and the inlet of the second evaporator is connected to the third passage switching valve
Of the first connecting pipe and the second expansion device connected to the
Connect to the second bypass channel connected to the inlet side, and
Second connection pipe for connecting the passage selector valve to the inlet of the first evaporator
And a third expansion device, and a refrigeration cycle in which the pipes from the defrost valve to which the first bypass flow path from the compressor is connected are connected to the inlets of the first and second evaporators , Refrigerating room temperature detecting means provided in the refrigerating room, freezing room temperature detecting means provided in the freezing room, refrigerating room air circulating means for circulating air from one evaporator to the refrigerating room, and the other to the freezing room A freezer air circulation means for circulating the air from the evaporator of
When defrosting the first evaporator, close the first flow path switching valve to defrost
The valve connects the first bypass channel and the inlet of the first evaporator.
The first evaporator is the condenser and the second evaporator is the evaporator.
The first flow during defrosting of the second evaporator.
The path switching valve is closed, and the defrost valve is used to connect the first bypass passage and the second bypass passage.
The second evaporator is connected to the condenser, and the first evaporator is connected to the first evaporator.
By configuring a cycle in which the
Ri, effect that can also be cooled during operation defrosting operation can be obtained. Furthermore, since the waste heat of the refrigeration cycle is used for defrosting, the effect of significantly reducing the power consumption of the refrigerator / freezer can be obtained.

【０１０７】また、冷凍サイクルに可燃性冷媒を用いる
ためにオゾン層破壊や地球温暖化などの地球環境に悪影
響を与えることの少ない効果が得られる。Further, since a flammable refrigerant is used in the refrigeration cycle, it is possible to obtain the effect of less adversely affecting the global environment such as ozone layer depletion and global warming.

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

【図１】 実施の形態１を示す図で、冷凍冷蔵庫の側面
断面図である。FIG. 1 shows the first embodiment and is a side sectional view of a refrigerator-freezer.

【図２】 実施の形態１を示す図で、冷凍冷蔵庫の冷媒
回路図である。FIG. 2 shows the first embodiment and is a refrigerant circuit diagram of a refrigerator-freezer.

【図３】 実施の形態１を示す図で、冷凍冷蔵庫の制御
タイミングチャート図である。FIG. 3 shows the first embodiment and is a control timing chart of the refrigerator-freezer.

【図４】 実施の形態１を示す図で、冷凍冷蔵庫の冷蔵
室、野菜室と冷凍室を同時冷却する場合の冷蔵庫内空気
の流れを表す図である。FIG. 4 shows the first embodiment and is a diagram showing a flow of air in the refrigerator in the case of simultaneously cooling the refrigerating room, the vegetable room, and the freezing room of the freezer-refrigerator.

【図５】 実施の形態１を示す図で、冷凍冷蔵庫の冷凍
室のみを冷却する場合の冷蔵庫内空気の流れを表す図で
ある。FIG. 5 is a diagram showing the first embodiment and is a diagram showing a flow of air in the refrigerator when only the freezing compartment of the refrigerator is cooled.

【図６】 実施の形態１を示す図で、冷凍冷蔵庫の除霜
時の冷蔵庫内空気の流れを表す図である。FIG. 6 is a diagram showing the first embodiment and is a diagram showing a flow of air in the refrigerator during defrosting of the refrigerator-freezer.

【図７】 実施の形態２を示す図で、冷凍冷蔵庫の側面
断面図である。FIG. 7 shows the second embodiment and is a side sectional view of a refrigerator-freezer.

【図８】 実施の形態２を示す図で、冷凍冷蔵庫の制御
タイミングチャート図である。FIG. 8 shows the second embodiment and is a control timing chart of the refrigerator-freezer.

【図９】 実施の形態３を示す図で、冷凍冷蔵庫の側面
断面図である。FIG. 9 is a diagram showing the third embodiment and is a side sectional view of a refrigerator-freezer.

【図１０】 実施の形態３を示す図で、冷凍冷蔵庫の制
御タイミングチャート図である。FIG. 10 shows the third embodiment and is a control timing chart of the refrigerator-freezer.

【図１１】 実施の形態４を示す図で、冷凍冷蔵庫の側
面断面図である。FIG. 11 shows Embodiment 4 and is a side sectional view of a refrigerator-freezer.

【図１２】 実施の形態４を示す図で、冷凍冷蔵庫の冷
媒回路図である。FIG. 12 shows Embodiment 4 and is a refrigerant circuit diagram of a refrigerator-freezer.

【図１３】 実施の形態４を示す図で、冷凍冷蔵庫の制
御タイミングチャート図である。FIG. 13 shows the fourth embodiment and is a control timing chart of the refrigerator-freezer.

【図１４】 実施の形態５を示す図で、冷凍冷蔵庫の側
面断面図である。FIG. 14 is a view showing the fifth embodiment and is a side sectional view of a refrigerator-freezer.

【図１５】 実施の形態５を示す図で、冷凍冷蔵庫の冷
媒回路図である。FIG. 15 shows the fifth embodiment and is a refrigerant circuit diagram of a refrigerator-freezer.

【図１６】 実施の形態５を示す図で、冷凍冷蔵庫の冷
媒回路図である。FIG. 16 is a diagram showing the fifth embodiment and is a refrigerant circuit diagram of a refrigerator-freezer.

【図１７】 実施の形態６を示す図で、冷凍冷蔵庫の側
面断面図である。FIG. 17 shows Embodiment 6 and is a side sectional view of a refrigerator-freezer.

【図１８】 実施の形態６を示す図で、冷凍冷蔵庫の冷
媒回路図である。FIG. 18 shows Embodiment 6 and is a refrigerant circuit diagram of a refrigerator-freezer.

【図１９】 実施の形態６を示す図で、冷凍冷蔵庫の冷
蔵室用蒸発器の除霜時における冷媒の流れを表す冷媒回
路図である。FIG. 19 is a diagram showing the sixth embodiment and is a refrigerant circuit diagram showing the flow of the refrigerant during defrosting of the evaporator for the refrigerating compartment of the refrigerator / freezer.

【図２０】 実施の形態６を示す図で、冷凍冷蔵庫の冷
凍室用蒸発器の除霜時における冷媒の流れを表す冷媒回
路図である。FIG. 20 is a diagram showing the sixth embodiment and is a refrigerant circuit diagram showing the flow of the refrigerant when defrosting the evaporator for the freezer compartment of the refrigerator / freezer.

【図２１】 実施の形態６を示す図で、冷凍冷蔵庫の冷
媒回路図である。FIG. 21 shows Embodiment 6 and is a refrigerant circuit diagram of a refrigerator-freezer.

【図２２】 従来の冷蔵庫の側面断面図である。FIG. 22 is a side sectional view of a conventional refrigerator.

【図２３】 従来の冷凍冷蔵庫の冷媒回路図である。FIG. 23 is a refrigerant circuit diagram of a conventional refrigerator-freezer.

【図２４】 従来の冷凍冷蔵庫の制御タイミングチャー
ト図である。FIG. 24 is a control timing chart of a conventional refrigerator-freezer.

【符号の説明】[Explanation of symbols]

１ 圧縮機、２ 凝縮器、３ 毛細管、４ 蒸発器、５
ヘッダー、１０ 冷凍室庫内温度検出手段、１１ 空
気循環手段、１２ 冷凍室の空気循環制御手段、１３
冷蔵室の空気循環制御手段、１４ カサ、１５ 冷凍
室、１６ 冷蔵室、１７ 冷凍室空気吹出し口、１８ａ
〜１８ｄ 冷蔵室空気吹出し口、１９ 冷蔵室用ダク
ト、２０ 野菜室、２１ 冷蔵室庫内温度検出手段、２
２ 遮断弁、２３ コントローラ、２５ａ，２５ｂ 冷
蔵室空気吸込み口、２６ａ〜２６ｃ野菜室空気吹出し
口、２７ａ，２７ｂ 野菜室空気吸込み口、２８ 庫内
空気戻りダクト、３１ 冷蔵室用蒸発器、３２ 冷蔵室
空気循環手段、３３ 第１流路切換弁、３４ 除霜弁、
３５ 第１バイパス流路、３６ 第３流路切換弁、３７
第４流路切換弁、３８ 第１接続配管、３９ 第２絞り
装置である毛細管、４０ 第２接続配管、４１ 第３絞
り装置である毛細管、４２ 第２バイパス流路、４３
第３バイパス流路、４４ 冷凍室空気吸込み口、４５
小容量電気ヒータ、４６ 蒸発トレイ、４７ ドレン水
通水パイプ、４８ 蒸発器温度検出手段、５０ 第３接
続配管、５１ 第４接続配管、６１ 冷凍室空気循環手
段、６３ａ，６３ｂ 絞り装置である電子膨張弁、６９
第２絞り装置である電子膨張弁、７１ 第３絞り装置
である電子膨張弁、７４ 冷凍室用蒸発器。1 compressor, 2 condenser, 3 capillary tube, 4 evaporator, 5
Header, 10 Freezing room internal temperature detecting means, 11 Air circulation means, 12 Freezing room air circulation control means, 13
Air circulation control means for refrigerating room, 14 Casa, 15 freezing room, 16 refrigerating room, 17 freezing room air outlet, 18a
-18d Refrigerating room air outlet, 19 Refrigerating room duct, 20 Vegetable room, 21 Refrigerating room temperature detecting means, 2
2 Shut-off valve, 23 Controller, 25a, 25b Refrigerator air inlet, 26a-26c Vegetable room air outlet, 27a, 27b Vegetable room air inlet, 28 Air return duct, 31 Refrigerator evaporator, 32 Refrigerator Room air circulation means, 33 first flow path switching valve, 34 defrost valve,
35 first bypass passage, 36 third passage switching valve, 37
4th flow-path switching valve, 38 1st connection piping, 39 2nd expansion device capillary, 40 2nd connection piping, 41 3rd expansion device capillary, 42 2nd bypass flow path, 43
Third bypass flow passage, 44 Freezer air intake, 45
Small-capacity electric heater, 46 evaporation tray, 47 drain water passage pipe, 48 evaporator temperature detecting means, 50 third connecting pipe, 51 fourth connecting pipe, 61 freezer compartment air circulating means, 63a, 63b electronic as throttle device Expansion valve, 69
Electronic expansion valve that is the second expansion device, 71 Electronic expansion valve that is the third expansion device, 74 Freezer evaporator.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平９−113092（ＪＰ，Ａ) 特開 平９−189473（ＪＰ，Ａ) 特開 平11−211328（ＪＰ，Ａ) 特開 平７−248164（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F25D 11/02 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-9-113092 (JP, A) JP-A-9-189473 (JP, A) JP-A-11-211328 (JP, A) JP-A-7- 248164 (JP, A) (58) Fields surveyed (Int.Cl. 7 , DB name) F25D 11/02

Claims (8)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 圧縮機、凝縮器、絞り装置、蒸発器を冷
媒配管により順次連結してなる冷凍サイクルと、 冷蔵室に設けられた冷蔵室温度検出手段と、 冷凍室に設けられた冷凍室温度検出手段と、 前記冷蔵室温度検出手段により検知された冷蔵室庫内温
度と設定値とを比較し、前記冷蔵室への前記蒸発器から
の空気の循環を制御する冷蔵室の空気循環制御手段と、 前記冷凍室温度検出手段により検知された冷凍室庫内温
度と設定値とを比較し、前記冷凍室への前記蒸発器から
の空気の循環を制御する冷凍室の空気循環制御手段と、 前記冷蔵室、前記冷凍室等へ前記蒸発器からの空気を循
環させる空気循環手段と、 を備え、前記冷凍室の空気循環制御手段が前記冷凍室へ
空気を搬送可能な状態もしくは前記冷蔵室の空気循環制
御手段が前記冷蔵室に空気を搬送可能な状態である場合
に前記空気循環手段を駆動させ、前記圧縮機が停止する
と共に、前記冷凍室の空気循環制御手段が前記冷凍室に
空気を搬送不可能な状態であり、前記冷蔵室の温度が設
定値より大きくなった場合に、前記冷蔵室の空気循環制
御手段が前記冷蔵室に空気を搬送可能な状態に制御され
ることを特徴とする冷凍冷蔵庫。 1. A refrigeration cycle in which a compressor, a condenser, a throttle device and an evaporator are sequentially connected by a refrigerant pipe, a refrigerating compartment temperature detecting means provided in the refrigerating compartment, and a freezing compartment provided in the freezing compartment. An air circulation control of the refrigerating compartment, which compares the temperature inside the refrigerating compartment detected by the refrigerating compartment temperature detecting means with a set value, and controls the circulation of air from the evaporator to the refrigerating compartment. Means, comparing the temperature inside the freezer compartment detected by the freezer compartment temperature detection means and a set value, and air circulation control means of the freezer compartment for controlling the circulation of air from the evaporator to the freezer compartment; An air circulation means for circulating the air from the evaporator to the refrigerating compartment, the freezing compartment, etc., wherein the air circulation control means of the refrigerating compartment is capable of transporting air to the freezing compartment or the refrigerating compartment The air circulation control means of the refrigeration When the air can be conveyed to the chamber, the air circulating means is driven and the compressor is stopped.
At the same time, the air circulation control means of the freezer is installed in the freezer.
Air cannot be transported, and the temperature in the
When it becomes larger than the set value, the air circulation control in the refrigerating room
The control means is controlled so that air can be transferred to the refrigerating chamber.
A freezer-refrigerator characterized in that 【請求項２】 冷凍サイクルの冷媒に可燃性冷媒を使用
し、前記蒸発器の除霜用の電気ヒータとして、通電した
場合に前記電気ヒータの表面温度が可燃性冷媒の着火温
度以下になる容量の電気ヒータを備え、圧縮機積算運転
時間が設定値より長くなった場合に前記電気ヒータに通
電するように制御することを特徴とする請求項１記載の
冷凍冷蔵庫。2. A flammable refrigerant is used as the refrigerant of the refrigeration cycle.
Then, electricity was supplied as an electric heater for defrosting the evaporator.
In this case, the surface temperature of the electric heater is the ignition temperature of the flammable refrigerant.
2. The refrigerator / freezer according to claim 1, further comprising an electric heater having a capacity of less than or equal to 10 degrees, and controlling to energize the electric heater when the compressor cumulative operating time becomes longer than a set value. 【請求項３】 前記凝縮器と前記絞り装置との間に冷媒
の流れを閉止することができる遮断弁を設け、前記冷凍
室温度検出手段の出力が予め設定した値以下になった場
合に前記遮断弁を閉止状態にし、前記圧縮機を設定時間
遅らせて停止させるように制御することを特徴とする請
求項１記載の冷凍冷蔵庫。 3. A refrigerant between the condenser and the expansion device.
The shutoff valve that can close the flow of
When the output of the room temperature detection means falls below a preset value
Shut off the shutoff valve and set the compressor for the set time.
A contract characterized by controlling to delay and stop
The freezer-refrigerator according to claim 1. 【請求項４】 圧縮機、凝縮器、流路切換弁を順次冷媒
配管で接続し、流路切換弁に絞り装置を並行に２つ接続
し、一方の絞り装置に一方の蒸発器を接続し、他方の絞
り装置に除霜弁を介して他方の蒸発器を接続し、一方の
蒸発器の出口と前記圧縮機からのバイパス流路とを前記
除霜弁に接続した冷凍サイクルと、冷蔵室に設けられた冷蔵室温度検出手段と、 冷凍室に設けられた冷凍室温度検出手段と、 前記冷蔵室へ前記一方の蒸発器からの空気を循環させる
冷蔵室空気循環手段と、 前記冷凍室へ前記他方の蒸発器からの空気を循環させる
冷凍室空気循環手段と、 を備え、前記流路切換弁は前記冷蔵室温度検出手段が検
出した冷蔵室温度が設定値より低くなったら流路を他方
の絞り装置に切換え、設定値より高くなったら所定時間
後に一方の絞り装置に切換えると共に、前記所定時間の
間前記冷蔵室空気循環手段を運転して前記一方の蒸発器
の除霜を行い、 前記圧縮機の運転積算時間が設定値よりも大きくなった
場合に、前記除霜弁を前記バイパス流路と前記他方の蒸
発器の入口が接続される流路に切換えて前記他方の蒸発
器の除霜を行う ことを特徴とする冷凍冷蔵庫。4. A compressor, a condenser, and a flow path switching valve are sequentially connected by a refrigerant pipe, two flow path switching valves are connected in parallel with two expansion devices, and one expansion device is connected with one evaporator. , The other diaphragm
Connect the other evaporator via the defrost valve to the
The outlet of the evaporator and the bypass flow path from the compressor are
A refrigeration cycle connected to the defrost valve, a refrigerating compartment temperature detecting means provided in the refrigerating compartment, a freezing compartment temperature detecting means provided in the refrigerating compartment, and air from the one evaporator is circulated to the refrigerating compartment. And a freezing room air circulating means for circulating the air from the other evaporator to the freezing room, the flow path switching valve being detected by the refrigerating room temperature detecting means.
When the temperature of the refrigerating room is lower than the set value, switch the flow path to the other side.
Switch to the squeezing device and if it becomes higher than the set value, it will take a predetermined time
After switching to one diaphragm device later,
While operating the refrigerating compartment air circulation means, the one evaporator
After defrosting, the accumulated operating time of the compressor became larger than the set value.
In this case, the defrosting valve is connected to the bypass passage and the other steam
Switch to the flow path to which the inlet of the generator is connected and evaporate the other
A refrigerator / freezer characterized by defrosting the container . 【請求項５】 前記絞り装置を毛細管としたことを特徴
とする請求項４記載の冷凍冷蔵庫。5. The refrigerator-freezer according to claim 4, wherein the squeezing device is a capillary tube. 【請求項６】 前記絞り装置と前記流路切換弁を連続的
に開度調整可能な流量制御弁としたことを特徴とする請
求項４記載の冷凍冷蔵庫。6. The refrigerator-freezer according to claim 4 , wherein the expansion device and the flow path switching valve are flow rate control valves capable of continuously adjusting the opening degree. 【請求項７】 圧縮機、凝縮器、第１の流路切換弁を順
次冷媒配管で接続し、前記第１の流路切換弁に絞り装置
を並行に２つ接続しそれぞれの絞り装置に第１、第２の
蒸発器を接続し、前記第１、第２の蒸発器の出口にそれ
ぞれ第３、第４の流路切換弁を接続し、前記第３の流路
切換弁に前記第２の蒸発器の入口に接続する第１接続配
管及び第２絞り装置と前記圧縮機の吸入側に接続する第
２バイパス流路とを接続し、前記第４の流路切換弁に前
記第１の蒸発器の入口に接続する第２接続配管及び第３
絞り装置を接続し、前記第１、第２の蒸発器の入口に前
記圧縮機からの第１バイパス流路が接続された除霜弁か
らの配管を接続した冷凍サイクルと、 冷蔵室に設けられた冷蔵室温度検出手段と、 冷凍室に設けられた冷凍室温度検出手段と、 前記冷蔵室へ前記一方の蒸発器からの空気を循環させる
冷蔵室空気循環手段と、 前記冷凍室へ前記他方の蒸発器からの空気を循環させる
冷凍室空気循環手段と、 を備え、前記第１の蒸発器の除霜時、前記第１の流路切
換弁を閉じ、前記除霜弁により前記第１バイパス流路と
前記第１の蒸発器の入口が連通して前記第１の蒸発器が
凝縮器、前記第２の蒸発器が蒸発器となるサイクルを構
成し、 前記第２の蒸発器の除霜時、前記第１の流路切換弁を閉
じ、前記除霜弁により前記第１バイパス流路と前記第２
の蒸発器の入口が連通して前記第２の蒸発器が凝縮器、
前記第１の蒸発器が蒸発器となるサイクルを構成するこ
とを特徴とする冷凍冷蔵庫。 7. A compressor, a condenser, and a first flow path switching valve are sequentially connected by a refrigerant pipe, and two throttling devices are connected in parallel to the first flow path switching valve, and each throttling device has a first First and second evaporators are connected to the outlets of the first and second evaporators.
The third and fourth flow path switching valves are connected to each other, and the third flow path is connected.
The switching valve has a first connection arrangement connected to the inlet of the second evaporator.
A pipe and a second expansion device, and a first connecting device connected to the suction side of the compressor
2 Bypass flow path is connected to the fourth flow path switching valve
Note Second connecting pipe and third connecting to the inlet of the first evaporator
A refrigeration cycle in which a throttle device is connected and a pipe from a defrost valve in which the first bypass flow path from the compressor is connected to the inlets of the first and second evaporators is connected, and a refrigerating chamber is provided. Refrigerating compartment temperature detecting means, freezing compartment temperature detecting means provided in the freezing compartment, refrigerating compartment air circulating means for circulating air from the one evaporator to the refrigerating compartment, and the other to the freezing compartment A freezer compartment air circulation means for circulating the air from the evaporator; and when the first evaporator is defrosted, the first flow path cutoff
The exchange valve is closed, and the defrost valve connects the first bypass passage
The inlet of the first evaporator is in communication with the first evaporator.
A cycle in which the condenser and the second evaporator serve as an evaporator is constructed.
And when the second evaporator is defrosted, the first flow path switching valve is closed.
The first bypass passage and the second bypass passage by the defrost valve.
And the second evaporator is connected to the condenser,
A cycle in which the first evaporator is an evaporator can be configured.
Refrigerator and refrigerator characterized by. 【請求項８】 冷凍サイクルに可燃性冷媒を用いること
を特徴とする請求項１、３〜７のいずれかに記載の冷凍
冷蔵庫。8. The freezer-refrigerator according to claim 1, wherein a flammable refrigerant is used in the refrigeration cycle.
JP2000048130A 2000-02-24 2000-02-24 Freezer refrigerator Expired - Fee Related JP3484131B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000048130A JP3484131B2 (en) 2000-02-24 2000-02-24 Freezer refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000048130A JP3484131B2 (en) 2000-02-24 2000-02-24 Freezer refrigerator

Publications (2)

Publication Number Publication Date
JP2001241825A JP2001241825A (en) 2001-09-07
JP3484131B2 true JP3484131B2 (en) 2004-01-06

Family

ID=18570260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000048130A Expired - Fee Related JP3484131B2 (en) 2000-02-24 2000-02-24 Freezer refrigerator

Country Status (1)

Country Link
JP (1) JP3484131B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011038716A (en) * 2009-08-12 2011-02-24 Hitachi Appliances Inc Refrigerator
CN102313424A (en) * 2010-07-02 2012-01-11 日立空调·家用电器株式会社 Refrigerator
JP2012047363A (en) * 2010-08-25 2012-03-08 Hitachi Appliances Inc Refrigerator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008261433A (en) 2007-04-12 2008-10-30 Nidec Sankyo Corp Valve element opening/closing device
JP5017340B2 (en) * 2009-09-09 2012-09-05 日立アプライアンス株式会社 refrigerator
JP2012057888A (en) * 2010-09-10 2012-03-22 Hitachi Appliances Inc Refrigerator
KR101959309B1 (en) * 2013-01-30 2019-03-18 엘지전자 주식회사 Refrigerator and Control method of the same
JP6261327B2 (en) * 2013-12-20 2018-01-17 三菱電機株式会社 Freezer refrigerator
WO2020093039A2 (en) * 2018-11-04 2020-05-07 Elemental Machines, Inc. Method and apparatus for determining freezer status
CN113218135A (en) * 2020-01-21 2021-08-06 青岛海尔电冰箱有限公司 Air-cooled refrigerator and control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011038716A (en) * 2009-08-12 2011-02-24 Hitachi Appliances Inc Refrigerator
CN102313424A (en) * 2010-07-02 2012-01-11 日立空调·家用电器株式会社 Refrigerator
JP2012047363A (en) * 2010-08-25 2012-03-08 Hitachi Appliances Inc Refrigerator

Also Published As

Publication number Publication date
JP2001241825A (en) 2001-09-07

Similar Documents

Publication Publication Date Title
US6935127B2 (en) Refrigerator
GB2518559B (en) Binary refrigeration apparatus
US10088216B2 (en) Refrigerator and method of controlling the same
WO2001079772A1 (en) Refrigerator with thermal storage
US9677789B2 (en) Refrigeration appliance with two evaporators in different compartments
US10539357B2 (en) Refrigerator and method of controlling the same
JP3484131B2 (en) Freezer refrigerator
JP3975664B2 (en) Refrigerating refrigerator, operation method of freezing refrigerator
JP4211847B2 (en) Refrigeration equipment
RU2432532C2 (en) Procedure for control of refrigerator and refrigerator with time delay of compressor turning on
JP4123257B2 (en) Refrigeration equipment
JP7416238B2 (en) Refrigeration cycle equipment
JP3576040B2 (en) Cooling systems and refrigerators
JP3847499B2 (en) Two-stage compression refrigeration system
CN109780776B (en) Refrigerator and control method thereof
JPH10300321A (en) Cooler for freezer refrigerator and its defrosting method
JPH04288454A (en) Refrigerating device using heat transfer of capillary tube and suction line
JP4169080B2 (en) Freezer refrigerator
KR0182726B1 (en) Defrosting apparatus for independent refrigerating type refrigerator
JP4618313B2 (en) Refrigeration equipment
JP5068340B2 (en) Freezer refrigerator
JP2002195724A (en) Refrigerator
KR100394008B1 (en) Refrigerating cycle for refrigerator and method for controlling the same
KR20050063218A (en) Refrigerating cycle in direct cooling type refrigerator and method thereof
CN110249192A (en) Freezer

Legal Events

Date Code Title Description
TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20031007

R150 Certificate of patent or registration of utility model

Ref document number: 3484131

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20071017

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081017

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091017

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091017

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101017

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111017

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121017

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131017

Year of fee payment: 10

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees