JPH10267504A - Refrigerator - Google Patents
RefrigeratorInfo
- Publication number
- JPH10267504A JPH10267504A JP7215497A JP7215497A JPH10267504A JP H10267504 A JPH10267504 A JP H10267504A JP 7215497 A JP7215497 A JP 7215497A JP 7215497 A JP7215497 A JP 7215497A JP H10267504 A JPH10267504 A JP H10267504A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerator
- evaporator
- compressor
- compartment
- freezer
- 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.)
- Abandoned
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数の蒸発器と複
数の冷気循環ファンを設け、各蒸発器が直列に接続され
た冷凍サイクルを構成した冷蔵庫に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator comprising a plurality of evaporators and a plurality of cooling air circulation fans, and constituting a refrigeration cycle in which the evaporators are connected in series.
【０００２】[0002]
【従来の技術】一般に、冷蔵庫は圧縮機から吐出された
冷媒が凝縮器→絞り弁→蒸発器を通り、再び圧縮機に戻
る冷凍サイクルを構成し、冷蔵室と冷凍室の異なる２温
度空間を蒸発器と冷気循環ファンからなる１つの冷却シ
ステムのみで冷却するようになっている。通常、蒸発器
と冷気循環ファンからなる冷却システムは冷凍室の背面
部に配置されており、蒸発器で熱交換された冷気は冷気
循環ファンで冷気ダクトや流路切替用の電動ダンパを介
して各部屋に供給され、それぞれ所定温度に冷却され
る。また、冷蔵室や野菜室に供給される冷気の温度は冷
凍室に供給される冷気の温度と同じであるため、冷蔵室
や野菜室への冷気を供給する冷気ダクトには断熱を施す
必要があった。2. Description of the Related Art Generally, a refrigerator constitutes a refrigeration cycle in which refrigerant discharged from a compressor passes through a condenser → a throttle valve → an evaporator and returns to a compressor again. The cooling is performed by only one cooling system including the evaporator and the cool air circulation fan. Normally, a cooling system consisting of an evaporator and a cool air circulation fan is arranged on the back of the freezer, and the cool air exchanged by the evaporator is cooled by a cool air circulation fan through a cool air duct and an electric damper for switching the flow path. It is supplied to each room and cooled to a predetermined temperature. In addition, since the temperature of the cold air supplied to the refrigerator compartment or the vegetable compartment is the same as the temperature of the cold air supplied to the freezing compartment, it is necessary to insulate the cold air duct that supplies the cold air to the refrigerator compartment or the vegetable compartment. there were.
【０００３】ところが、近年の冷蔵庫は省エネルギーと
ともに庫内の高容積化を図る傾向にある。しかし、これ
らの電動ダンパ、断熱ダクトを有する従来タイプの冷蔵
庫では大幅な容積率（内容積／外形寸法）の向上は望め
ず、現構成冷蔵庫での容積率は限界であった。さらに、
１つの蒸発器で複数の部屋を冷却するため、例えば蒸発
器への着霜要因が主に冷蔵室側にあるにもかかわらず霜
を溶かす除霜の際には冷凍室の温度上昇まで招いたり、
各部屋間での臭い移りなどがあった。そこで、冷蔵と冷
凍の温度帯毎に蒸発器と冷却ファンを配置し、各温度帯
空間を独立させるとともに圧縮機回転数を制御して各温
度帯空間に適した冷気を供給して冷却する冷蔵庫が提案
されている。しかし、除霜を行う場合、それぞれの蒸発
器に除霜ヒータを必要とし、特に着霜量が多くなる冷蔵
温度帯側の蒸発器では比較的除霜回数を多くする必要が
あるため、除霜時に消費する電力量が増大するという問
題があった。[0003] However, recent refrigerators tend to increase the volume of the refrigerator while saving energy. However, in conventional refrigerators having these electric dampers and heat-insulating ducts, a significant improvement in the volume ratio (internal volume / outer dimensions) could not be expected, and the volume ratio in the current configuration refrigerator was limited. further,
Since a single evaporator cools a plurality of rooms, for example, the defrosting that melts frost, even though the frost on the evaporator is mainly in the refrigerator compartment side, may lead to an increase in the temperature of the freezer compartment. ,
There was a smell transfer between rooms. Therefore, a refrigerator that arranges an evaporator and a cooling fan for each temperature zone of refrigeration and freezing, makes each temperature zone space independent, controls the number of rotations of the compressor, and cools by supplying appropriate cold air to each temperature zone space Has been proposed. However, when performing defrosting, a defrosting heater is required for each evaporator, and the number of times of defrosting needs to be relatively large, particularly in the refrigeration temperature zone side where the amount of frost is large. There is a problem that the amount of power consumed sometimes increases.
【０００４】[0004]
【発明が解決しようとする課題】このように、冷蔵と冷
凍の温度帯毎に蒸発器と冷却ファンを配置し、各温度帯
空間を独立させて各部屋を冷却する冷蔵庫では、それぞ
れの蒸発器に除霜ヒータを必要とした。そして、特に着
霜量が多くなる冷蔵温度帯側の蒸発器では着霜による閉
塞を防ぐ必要からフィンピッチを大きくするため小型化
には限界があった。また、比較的除霜回数を多くする必
要があるため、除霜時に消費する電力量が増大するばか
りか圧縮機を停止するため除霜の必要がない冷凍側の庫
内温度上昇を招くという問題があった。As described above, in a refrigerator in which an evaporator and a cooling fan are arranged for each of the refrigeration and freezing temperature zones, and the respective temperature zone spaces are made independent and the respective rooms are cooled, the respective evaporators are provided. Required a defrost heater. In particular, in the evaporator on the refrigeration temperature zone side where the amount of frost increases, it is necessary to prevent blockage due to frost. Further, since it is necessary to increase the number of times of defrosting relatively, not only does the amount of power consumed at the time of defrosting increase, but also the temperature of the freezer side rises without the need for defrosting because the compressor is stopped. was there.
【０００５】本発明は、上記に鑑みてなされたもので、
第１に冷蔵室蒸発器は除霜ヒータを必要とすることなく
短時間で完全除霜を行うことができて消費電力量を低減
することができ、第２に冷蔵室蒸発器及び冷凍室蒸発器
は着霜状態を想定した最適なフィンピッチに構成するこ
とができて小型化を図ることができ、第３に冷蔵室内を
食品の鮮度保存に適した高湿度にすることができる冷蔵
庫を提供することを目的とする。[0005] The present invention has been made in view of the above,
First, the refrigerating compartment evaporator can perform complete defrosting in a short time without the need for a defrosting heater and can reduce power consumption. Second, the refrigerating compartment evaporator and the freezing compartment evaporator can be used. The refrigerator can be configured with an optimal fin pitch assuming a frosted state, can be reduced in size, and thirdly, provides a refrigerator that can make the refrigerator compartment high in humidity suitable for preserving food freshness. The purpose is to do.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、請求項１記載の発明は、目的温度別に開閉可能な扉
を持って多段構成された各部屋を、冷蔵室と冷凍室に区
画し、前記冷蔵室には冷蔵室蒸発器と冷蔵室ファンを設
置し前記冷凍室には冷凍室蒸発器と冷凍室ファンを設置
し、冷媒が圧縮機、凝縮器、絞り機構、前記冷蔵室蒸発
器、前記冷凍室蒸発器の順に流れる冷蔵庫において、前
記冷蔵室蒸発器の除霜時には、前記圧縮機の稼動状態に
おいて前記冷凍室蒸発器への冷媒の供給を停止して前記
冷蔵室蒸発器へ冷媒を滞留させるように構成してなるこ
とを要旨とする。この構成により、冷蔵室蒸発器に冷媒
を滞留させることで、冷蔵室蒸発器は次第に高温高圧状
態となり、短時間で冷蔵室蒸発器の完全除霜が行われ
る。According to a first aspect of the present invention, a multi-stage room having doors that can be opened and closed according to a target temperature is divided into a refrigerator room and a freezer room. The refrigerator has a refrigerator evaporator and a refrigerator fan, the refrigerator has a refrigerator evaporator and a refrigerator fan, and a refrigerant, a compressor, a condenser, a throttle mechanism, and a refrigerator evaporator. In the refrigerator that flows in the order of the refrigerator and the freezer compartment evaporator, when the refrigerator compartment evaporator is defrosted, the supply of the refrigerant to the freezer compartment evaporator is stopped in the operating state of the compressor and the refrigerator compartment evaporator is defrosted. The gist is that the refrigerant is configured to be retained. With this configuration, the refrigerant stays in the refrigerating compartment evaporator, whereby the refrigerating compartment evaporator gradually becomes in a high-temperature and high-pressure state, and complete defrosting of the refrigerating compartment evaporator is performed in a short time.
【０００７】請求項２記載の発明は、上記請求項１記載
の冷蔵庫において、前記冷蔵室蒸発器と前記冷凍室蒸発
器の連結パイプに開閉弁を設け、前記冷蔵室蒸発器の除
霜時に、前記開閉弁は前記圧縮機を停止する所定時間前
に閉とするように構成してなることを要旨とする。この
構成により、具体的には、開閉弁を閉じてから所定時間
後に圧縮機を停止することで、冷蔵室蒸発器に冷媒が滞
留し、冷蔵室蒸発器が高温高圧状態となって、短時間で
確実に冷蔵室蒸発器の完全除霜が行われる。According to a second aspect of the present invention, in the refrigerator according to the first aspect, an on-off valve is provided in a connecting pipe between the refrigerator compartment evaporator and the freezer compartment evaporator, and when the refrigerator compartment evaporator is defrosted, The gist is that the on-off valve is configured to be closed a predetermined time before the compressor is stopped. With this configuration, specifically, by stopping the compressor after a predetermined time after closing the on-off valve, the refrigerant stays in the refrigerator compartment evaporator, and the refrigerator compartment evaporator becomes in a high-temperature and high-pressure state. Thus, complete defrosting of the refrigerator evaporator is performed.
【０００８】請求項３記載の発明は、上記請求項１記載
の冷蔵庫において、前記冷蔵室蒸発器と前記冷凍室蒸発
器の連結パイプに開閉弁を設け、前記冷蔵室蒸発器の除
霜時に、前記開閉弁を閉とした後、前記冷蔵室蒸発器が
所定温度に達した時に前記圧縮機を停止するように構成
してなることを要旨とする。この構成により、また、具
体的には、開閉弁を閉じた後、冷蔵室蒸発器が所定温度
に達した時に圧縮機を停止することで、短時間でより確
実に冷蔵室蒸発器の完全除霜が行われる。According to a third aspect of the present invention, in the refrigerator according to the first aspect, an on-off valve is provided in a connecting pipe between the refrigerator compartment evaporator and the freezer compartment evaporator, and when the refrigerator compartment evaporator is defrosted, The gist is such that the compressor is stopped when the temperature of the refrigerator evaporator reaches a predetermined temperature after the on-off valve is closed. According to this configuration, more specifically, after the on-off valve is closed, the compressor is stopped when the temperature of the refrigerator compartment evaporator reaches a predetermined temperature, so that the complete removal of the refrigerator compartment evaporator can be performed in a short time. Frost takes place.
【０００９】請求項４記載の発明は、目的温度別に開閉
可能な扉を持って多段構成された各部屋を、冷蔵室と冷
凍室に区画し、前記冷蔵室には冷蔵室蒸発器と冷蔵室フ
ァンを設置し前記冷凍室には冷凍室蒸発器と冷凍室ファ
ンを設置し、冷媒が圧縮機、凝縮器、絞り機構、前記冷
蔵室蒸発器、前記冷凍室蒸発器の順に流れる冷蔵庫にお
いて、前記冷蔵室蒸発器と前記冷凍室蒸発器の連結パイ
プに前記圧縮機の停止時に閉となる差圧弁を設けてなる
ことを要旨とする。この構成により、圧縮機の停止毎
に、高温高圧の冷媒が絞り機構を通って徐々に冷蔵室蒸
発器に流れ込み、冷蔵室蒸発器の温度が上昇して除霜が
行われる。According to a fourth aspect of the present invention, each of the multi-stage rooms having doors that can be opened and closed according to a target temperature is divided into a refrigerator room and a freezer room, and the refrigerator room has a refrigerator evaporator and a refrigerator room. In the refrigerator, a freezer evaporator and a freezer fan are installed in the freezer, and a refrigerant flows through the compressor, the condenser, the throttle mechanism, the refrigerator compartment evaporator, and the freezer evaporator in this order. The gist of the invention is that a connecting pipe between the refrigerator compartment evaporator and the freezer compartment evaporator is provided with a differential pressure valve which is closed when the compressor is stopped. With this configuration, each time the compressor is stopped, the high-temperature and high-pressure refrigerant gradually flows into the refrigerator evaporator through the throttle mechanism, and the temperature of the refrigerator evaporator rises to perform defrosting.
【００１０】請求項５記載の発明は、上記請求項４記載
の冷蔵庫において、前記圧縮機の停止後、前記冷蔵室蒸
発器の温度が所定温度に達した時に前記冷蔵室ファンを
駆動するように構成してなることを要旨とする。この構
成により、圧縮機停止毎の冷蔵室蒸発器の除霜が促進さ
れる。According to a fifth aspect of the present invention, in the refrigerator according to the fourth aspect, after the stop of the compressor, the refrigerator compartment fan is driven when the temperature of the refrigerator compartment evaporator reaches a predetermined temperature. The gist is to constitute. With this configuration, the defrosting of the refrigerator evaporator every time the compressor is stopped is promoted.
【００１１】請求項６記載の発明は、上記請求項４記載
の冷蔵庫において、前記圧縮機の停止後、所定時間経過
後に前記冷蔵室ファンを駆動するように構成してなるこ
とを要旨とする。この構成により、上記請求項５記載の
発明の作用と略同様の作用が得られる。According to a sixth aspect of the present invention, in the refrigerator of the fourth aspect, the refrigerator is configured to drive the refrigerating compartment fan after a lapse of a predetermined time after the stop of the compressor. With this configuration, substantially the same operation as the operation of the invention described in claim 5 can be obtained.
【００１２】請求項７記載の発明は、上記請求項４記載
の冷蔵庫において、前記絞り機構と並列にバイパス弁を
接続し、該バイパス弁を前記圧縮機の停止時から所定時
間だけ開とするように構成してなることを要旨とする。
この構成により、圧縮機の停止時に、冷蔵室蒸発器への
高温高圧冷媒の流入が促進されて、圧縮機停止毎の冷蔵
室蒸発器の除霜が短時間で行われる。According to a seventh aspect of the present invention, in the refrigerator according to the fourth aspect, a bypass valve is connected in parallel with the throttle mechanism, and the bypass valve is opened for a predetermined time from when the compressor is stopped. The gist of the present invention is that:
With this configuration, when the compressor is stopped, the flow of the high-temperature and high-pressure refrigerant into the refrigerator compartment evaporator is promoted, and the defrosting of the refrigerator compartment evaporator every time the compressor is stopped is performed in a short time.
【００１３】請求項８記載の発明は、上記請求項２，３
又は４記載の冷蔵庫において、前記開閉弁及び前記差圧
弁は前記冷蔵室内に配置するとともに前記連結パイプの
前記冷蔵室蒸発器側に設けてなることを要旨とする。こ
の構成により、開閉弁又は差圧弁自身及び開閉弁又は差
圧弁と冷蔵室蒸発器間の連結パイプへの着霜を抑えるこ
とが可能となる。[0013] The invention according to claim 8 is the invention according to claims 2 and 3 above.
Alternatively, in the refrigerator according to the fourth aspect, the on-off valve and the differential pressure valve may be disposed in the refrigerator compartment and may be provided on a side of the connecting pipe closer to the refrigerator compartment evaporator. With this configuration, it is possible to suppress the formation of frost on the on-off valve or the differential pressure valve itself and the connection pipe between the on-off valve or the differential pressure valve and the refrigerator evaporator.
【００１４】請求項９記載の発明は、上記請求項２，３
又は４記載の冷蔵庫において、前記開閉弁又は前記差圧
弁と前記冷凍室蒸発器との間の前記連結パイプは、断熱
を施すか又は断熱壁に埋設するかの何れかに構成してな
ることを要旨とする。この構成により、開閉弁又は差圧
弁と冷凍室蒸発器間の連結パイプへの着霜が防止され
る。According to a ninth aspect of the present invention, there is provided the second aspect of the present invention.
Or in the refrigerator according to 4, wherein the connection pipe between the on-off valve or the differential pressure valve and the freezer evaporator is configured to be either heat-insulated or embedded in a heat-insulating wall. Make a summary. This configuration prevents frost on the connecting pipe between the on-off valve or the differential pressure valve and the freezer evaporator.
【００１５】請求項１０記載の発明は、上記請求項２，
３又は４記載の冷蔵庫において、前記冷蔵室及び前記冷
凍室の庫内に露出する前記連結パイプにヒータを設けて
なることを要旨とする。この構成により、連結パイプへ
の着霜が防止される。According to a tenth aspect of the present invention,
The gist of the refrigerator according to 3 or 4, wherein a heater is provided on the connecting pipe exposed in the refrigerator and the freezer compartment. With this configuration, frost formation on the connecting pipe is prevented.
【００１６】[0016]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１７】図１乃至図４は、本発明の第１の実施の形
態を示す図である。まず、図１乃至図３を用いて、冷蔵
庫の構成を説明する。本実施の形態の冷蔵庫は、冷蔵温
度帯空間と冷凍温度帯空間に区画し、各温度空間毎を独
立させて各部屋を冷却する構造で、冷蔵温度帯空間と冷
凍温度帯空間に、それぞれ冷蔵室蒸発器と冷蔵室ファン
及び冷凍室蒸発器と冷凍室ファンが設置されており、冷
蔵室蒸発器を庫内上部に配置したものである。図１にお
いて、１は冷蔵庫本体を示しており、上方から冷蔵室
２、低温野菜室３、第１冷凍室４及び第２冷凍室５を有
し、冷蔵庫１の庫内は上下に仕切る断熱仕切壁６によっ
て、冷蔵室２と低温野菜室３からなる冷蔵温度帯空間４
０と、第１冷凍室４及び第２冷凍室５からなる冷凍温度
帯空間５０に区間され、さらに冷蔵室２と低温野菜室３
は冷蔵室仕切板７で区画され、第１冷凍室４と第２冷凍
室５は冷凍室仕切板８で区画されている。９は冷蔵室２
内に設けられた着脱可能な棚である。したがって、冷蔵
室２、低温野菜室３、第１冷凍室４及び第２冷凍室５
は、それぞれ異なる温度で冷却されるとともに各部屋は
それぞれの開閉扉１０，１１，１２，１３の開閉により
食品の出し入れが行え、冷蔵温度帯空間４０と冷凍温度
帯空間５０の冷気は完全に独立し、各冷気が混合するこ
とはない構造となっている。冷蔵室蒸発器１７と冷蔵室
ファン１９は冷蔵室２最上段奥に配置され、冷凍室蒸発
器１８と冷凍室ファン２０は第１及び第２冷凍室４，５
の背壁内に配置されている。FIG. 1 to FIG. 4 are views showing a first embodiment of the present invention. First, the configuration of the refrigerator will be described with reference to FIGS. The refrigerator of the present embodiment has a structure in which a refrigerator is divided into a refrigerated temperature zone space and a frozen temperature zone space, and each temperature space is independently cooled to cool each room. A room evaporator and a refrigerating room fan, and a freezing room evaporator and a freezing room fan are installed, and the refrigerating room evaporator is arranged in the upper part of the refrigerator. In FIG. 1, reference numeral 1 denotes a refrigerator main body, which includes a refrigerator compartment 2, a low-temperature vegetable compartment 3, a first freezing compartment 4 and a second freezing compartment 5 from above, and the inside of the refrigerator 1 is vertically insulated. Refrigerated temperature zone space 4 consisting of refrigerated room 2 and low-temperature vegetable room 3 by wall 6
0 and a freezing temperature zone space 50 including a first freezing room 4 and a second freezing room 5, and furthermore, a refrigerator room 2 and a low-temperature vegetable room 3.
Is partitioned by a refrigerator compartment partition 7, and the first freezer compartment 4 and the second freezer compartment 5 are partitioned by a freezer compartment partition 8. 9 is a refrigerator room 2
It is a removable shelf provided inside. Therefore, the refrigerator compartment 2, the low temperature vegetable compartment 3, the first freezer compartment 4, and the second freezer compartment 5
Are cooled at different temperatures, and each room can be put in and out of food by opening and closing the respective opening / closing doors 10, 11, 12, and 13. Cold air in the refrigerated temperature zone space 40 and the freezing temperature zone space 50 are completely independent. However, the structure is such that each cool air does not mix. The refrigerating compartment evaporator 17 and the refrigerating compartment fan 19 are arranged at the back of the uppermost stage of the refrigerating compartment 2, and the freezing compartment evaporator 18 and the freezing compartment fan 20 are connected to the first and second freezing compartments 4, 5.
It is located in the back wall.
【００１８】また、冷蔵庫本体１の背壁下部の機械室１
４には圧縮機１５、凝縮器１６、差圧弁２１及び絞り機
構２２等がそれぞれ配置されている。後述する開閉弁が
開の状態では、冷凍サイクルは等価的に図３に示すよう
な構成となって、圧縮機１５が起動すると圧縮機１５吸
込部の低圧信号を受けて差圧弁２１が開き、圧縮機１５
から吐出された冷媒が、凝縮器１６→差圧弁２１→絞り
機構２２→冷蔵室蒸発器１７→冷凍室蒸発器１８を通
り、再び圧縮機１５に戻るようになっている。なお、圧
縮機１５が停止すると圧縮機１５吸込部は高圧となり、
差圧弁２１は閉じることになるが、この機能は、圧縮機
１５が停止中に凝縮器１６内の高温高圧冷媒が低温低圧
となっている蒸発器への流入を抑え、熱ロスを防止する
ためである。The machine room 1 at the lower part of the back wall of the refrigerator body 1
4, a compressor 15, a condenser 16, a differential pressure valve 21, a throttle mechanism 22, and the like are arranged. When the on-off valve described later is open, the refrigeration cycle is equivalently configured as shown in FIG. 3. When the compressor 15 starts, the differential pressure valve 21 opens by receiving a low pressure signal of the compressor 15 suction part, Compressor 15
Is discharged through the condenser 16 → the differential pressure valve 21 → the throttle mechanism 22 → the refrigerator compartment evaporator 17 → the freezer compartment evaporator 18 and returns to the compressor 15 again. In addition, when the compressor 15 stops, the compressor 15 suction part becomes high pressure,
Although the differential pressure valve 21 is closed, the function is to prevent the high-temperature and high-pressure refrigerant in the condenser 16 from flowing into the low-temperature and low-pressure evaporator while the compressor 15 is stopped, thereby preventing heat loss. It is.
【００１９】そして、さらに本実施の形態では、図２に
示すように、冷蔵室蒸発器１７と冷凍室蒸発器１８を連
通する連結パイプ２４に開閉弁（電磁弁）２３が接続さ
れ、この開閉弁２３に並列に補助絞り機構３５が接続さ
れている。開閉弁２３及び補助絞り機構３５は連結パイ
プ２４の冷蔵室蒸発器１７側に接続されるとともに、冷
蔵室２内に配置されている。そして、開閉弁２３から冷
凍室蒸発器１８間の連結パイプ２４は断熱材で覆うか断
熱壁に埋設する構成となっている。Further, in the present embodiment, as shown in FIG. 2, an on-off valve (electromagnetic valve) 23 is connected to a connecting pipe 24 which connects the refrigerating room evaporator 17 and the freezing room evaporator 18. An auxiliary throttle mechanism 35 is connected in parallel with the valve 23. The on-off valve 23 and the auxiliary throttle mechanism 35 are connected to the refrigerating room evaporator 17 side of the connecting pipe 24 and are arranged in the refrigerating room 2. The connecting pipe 24 between the on-off valve 23 and the freezer evaporator 18 is covered with a heat insulating material or embedded in a heat insulating wall.
【００２０】次に、開閉弁２３が開状態の通常の稼動状
態での冷気の流れについて説明する。冷蔵室蒸発器１７
を通過した冷気は扉１０側に噴出し、下方に供給され
て、冷蔵室２内全域を冷却すると同時に冷気の一部は冷
蔵室仕切板７の連通孔を通って低温野菜室３に入り、低
温野菜室３を冷却する。冷蔵室２に配置された各棚９は
背壁側に流通口あるいは各棚９と背壁との間に隙間が設
けられており、低温野菜室３を冷却した冷気は冷蔵室２
を冷却した冷気とともに流通口あるいは各棚９と背壁と
の隙間を通って上段へと吸い込まれ、冷蔵室蒸発器１７
に戻ることになる。一方、第１冷凍室４及び第２冷凍室
５を冷却する冷気は冷凍室仕切板８に設けた吹出孔２５
から流入して第１冷凍室４を冷却し、第２冷凍室５へは
収納容器の後方から冷気供給が行われ冷却される。第１
冷凍室４及び第２冷凍室５は冷凍室仕切板８に設けられ
た連通孔２６で連通されており冷却後の冷気は合流して
第２冷凍室５の収納容器と底壁との隙間を通って冷凍室
蒸発器１８に戻る。Next, the flow of cool air in a normal operating state with the on-off valve 23 opened will be described. Cold room evaporator 17
Is discharged to the side of the door 10 and supplied downward to cool the entire area of the refrigerator compartment 2 and at the same time, a part of the cool air enters the cold vegetable compartment 3 through the communication hole of the refrigerator compartment partition plate 7, The low temperature vegetable room 3 is cooled. Each shelf 9 arranged in the refrigerator compartment 2 is provided with a circulation port on the back wall side or a gap between each shelf 9 and the back wall, and the cold air that has cooled the low-temperature vegetable compartment 3 is supplied to the refrigerator compartment 2.
Is sucked into the upper stage through the circulation port or the gap between each shelf 9 and the back wall together with the cooled cold air.
Will return to. On the other hand, the cool air for cooling the first freezer compartment 4 and the second freezer compartment 5 is supplied to the air outlet 25 provided in the freezer compartment partition plate 8.
To cool the first freezer compartment 4, and cool air is supplied to the second freezer compartment 5 from behind the storage container and cooled. First
The freezing room 4 and the second freezing room 5 are communicated with each other through a communication hole 26 provided in the freezing room partition plate 8, and the cooled cool air merges to form a gap between the storage container of the second freezing room 5 and the bottom wall. Then, it returns to the freezer evaporator 18.
【００２１】この構成の冷蔵庫では、圧縮機１５は各部
屋に配置された温度センサの出力と設定温度に応じて冷
蔵温度帯空間４０と冷凍温度帯空間５０のいずれか一方
の温度帯となるよう回転数が設定され、冷蔵室ファン１
９と冷凍室ファン２０は温度センサの出力に応じてそれ
ぞれ回転数を可変し、各部屋の温度調節を行う。例え
ば、通常の場合は第１冷凍室４と第２冷凍室５は−１８
℃〜−２０℃、冷蔵室２と低温野菜室３は−１℃〜３℃
に設定される。いずれの温度帯空間も設定温度に達して
いない場合、冷凍温度帯の温度に合わせることになる。
つまり、圧縮機１５は冷蔵室蒸発器１７と冷凍室蒸発器
１８の蒸発温度が−２８℃程度となるよう回転数が設定
され、冷蔵室ファン１９と冷凍室ファン２０を駆動す
る。冷凍温度帯空間５０では冷凍室ファン２０の駆動に
よって冷凍室蒸発器１８を通過した冷気は第１冷凍室４
と第２冷凍室５に供給されるが、この時の冷気吹出温度
は−２４℃程度となるように冷凍室ファン２０の回転数
を制御する。そして、第１冷凍室４に供給された冷気は
冷凍室仕切板８の連通孔２６を通り第２冷凍室５を介し
て冷凍室蒸発器１８に戻り、冷気は再び冷却されて供給
される。In the refrigerator having this configuration, the compressor 15 is set to one of the refrigerated temperature zone space 40 and the freezing temperature zone space 50 in accordance with the output of the temperature sensor disposed in each room and the set temperature. The number of revolutions is set, and the refrigerator compartment fan 1
The rotation speed of each of the refrigerator 9 and the freezing room fan 20 is varied according to the output of the temperature sensor, and the temperature of each room is adjusted. For example, in a normal case, the first freezing room 4 and the second freezing room 5 are −18.
℃ ~ -20 ℃, refrigeration room 2 and low temperature vegetable room 3 -1 ℃ ~ 3 ℃
Is set to If none of the temperature zones has reached the set temperature, the temperature is adjusted to the temperature of the freezing temperature zone.
That is, the rotation speed of the compressor 15 is set so that the evaporation temperature of the refrigerator compartment evaporator 17 and the freezer compartment evaporator 18 is about −28 ° C., and the refrigerator 15 drives the refrigerator compartment fan 19 and the freezer compartment fan 20. In the freezing temperature zone space 50, the cool air that has passed through the freezing room evaporator 18 by the driving of the freezing room fan 20 is supplied to the first freezing room 4.
Is supplied to the second freezer compartment 5. At this time, the rotation speed of the freezer compartment fan 20 is controlled such that the cool air blowing temperature becomes approximately −24 ° C. Then, the cool air supplied to the first freezer compartment 4 passes through the communication hole 26 of the freezer compartment partition plate 8, returns to the freezer compartment evaporator 18 via the second freezer compartment 5, and is cooled and supplied again.
【００２２】一方、冷蔵温度帯空間４０は−１℃〜３℃
に保つ必要があるが、前述したように冷蔵室蒸発器１７
と冷凍室蒸発器１８は図２のごとく直列に接続されてい
るため冷蔵室蒸発器１７の温度は冷凍室蒸発器１８とほ
ぼ同一温度となる。そこで、冷蔵室ファン１９の回転数
は、冷気吹出温度を−３℃程度となるように制御する。
また、外気温度変化あるいは扉１２，１３の開閉によっ
て庫内温度が変化した場合、圧縮機１５の回転数は庫内
温度に応じて可変される。そして、冷凍室蒸発器１８の
温度が変わると、冷蔵室蒸発器１７の温度も変化する
が、冷蔵室２への冷気吹出温度は設定温度になるよう冷
蔵室ファン１９の回転数が可変され、冷蔵温度帯空間４
０の温度は任意に保つことができる。冷蔵温度帯空間４
０の冷却が進み、設定温度に達した場合、冷蔵室ファン
１９は停止し、冷凍室ファン２０のみの運転となる。そ
して、冷蔵温度帯空間４０と冷凍温度帯空間５０の各部
屋がそれぞれ設定温度に達したら圧縮機１５と冷凍室フ
ァン２０を停止する。On the other hand, the refrigeration temperature zone space 40 is -1 ° C. to 3 ° C.
However, as described above, the cold room evaporator 17
The freezer compartment evaporator 18 is connected in series as shown in FIG. 2, so that the temperature of the refrigerator compartment evaporator 17 is substantially the same as the temperature of the freezer compartment evaporator 18. Therefore, the number of revolutions of the refrigerator compartment fan 19 is controlled so that the temperature of the cool air blowout is about -3 ° C.
When the internal temperature changes due to a change in the outside air temperature or opening and closing of the doors 12 and 13, the rotation speed of the compressor 15 is changed according to the internal temperature. When the temperature of the freezer evaporator 18 changes, the temperature of the refrigerator evaporator 17 also changes. However, the number of revolutions of the refrigerator fan 19 is changed so that the temperature of the cool air blown out to the refrigerator 2 becomes the set temperature. Refrigerated temperature zone space 4
The temperature of 0 can be kept arbitrarily. Refrigerated temperature zone space 4
When the cooling of 0 has progressed and the temperature has reached the set temperature, the refrigerating compartment fan 19 is stopped and only the freezing compartment fan 20 is operated. When the temperature of each of the refrigeration temperature zone space 40 and the freezing temperature zone space 50 reaches the set temperature, the compressor 15 and the freezing room fan 20 are stopped.
【００２３】次いで、開閉弁２３の開閉を用いた除霜方
法について、図４のタイミングチャートを用いて説明す
る。まず上記の状態から圧縮機１５が停止したら冷蔵室
ファン１９を駆動する。この時、冷蔵温度帯空間４０は
３℃程度であるため、冷蔵室蒸発器１７を介して庫内冷
気を循環すると、冷蔵室蒸発器１７に付いた霜が溶けて
庫内は食品保存に適した高湿度に保たれることになる。
しかしながら、冷蔵室ファン１９による冷気の庫内循環
だけでは十分な除霜が行われず、このような行程を繰り
返すと徐々に冷蔵室蒸発器１７への着霜が進行する。そ
こで冷蔵室ファン１９の庫内冷気循環のみによる除霜を
所定回数行った後、霜を十分に溶かすため冷媒充填によ
る除霜を行う必要がある。この冷媒充填除霜に移行する
場合、始めに冷蔵室ファン１９を停止し、開閉弁２３
を”閉”とする。すると冷媒は冷蔵室蒸発器１７に滞留
し、冷蔵室蒸発器１７は次第に高温高圧状態となり所定
時間（数十秒）経過後、あるいは所定温度に達したら圧
縮機１５を停止する。このよようにすると、冷蔵室蒸発
器１７の温度が上がって除霜が促進され、霜を十分に溶
かす完全な除霜が行われることになる。したがって、冷
蔵室ファン１９による庫内冷気循環のみによる除霜は圧
縮機１５の停止毎に行うが、この冷媒充填による除霜
は、圧縮機１５の運転回数、扉開閉回数あるいは外気温
度等で任意に行えばよく、従来のような電気ヒータを用
いることなく除霜が可能となる。なお、開閉弁２３と並
列に接続された補助絞り機構３５は、冷媒を冷蔵室蒸発
器１７に充填する際に、開閉弁２３より上流の高圧側圧
力が異常に高くならないための冷媒バイパス流路であ
る。Next, a defrosting method using the opening and closing of the on-off valve 23 will be described with reference to the timing chart of FIG. First, when the compressor 15 stops from the above state, the refrigerator compartment fan 19 is driven. At this time, since the refrigeration temperature zone space 40 is about 3 ° C., if cold air in the refrigerator is circulated through the refrigerator evaporator 17, the frost attached to the refrigerator evaporator 17 melts and the refrigerator is suitable for food preservation. Will be kept at high humidity.
However, sufficient defrosting is not performed only by circulating cold air in the refrigerator by the refrigerator compartment fan 19, and frost formation on the refrigerator compartment evaporator 17 gradually progresses by repeating such a process. Therefore, it is necessary to perform defrosting only by circulating cool air in the refrigerator of the refrigerating compartment fan 19 a predetermined number of times, and then perform defrosting by charging the refrigerant to sufficiently melt the frost. When shifting to this refrigerant charging and defrosting, first, the refrigerator compartment fan 19 is stopped, and the on-off valve 23 is opened.
Is "closed". Then, the refrigerant stays in the refrigerating room evaporator 17, and the refrigerating room evaporator 17 gradually becomes a high-temperature and high-pressure state, and after a lapse of a predetermined time (several tens of seconds) or reaches a predetermined temperature, the compressor 15 is stopped. By doing so, the temperature of the refrigerator compartment evaporator 17 rises, defrosting is promoted, and complete defrosting to sufficiently melt frost is performed. Therefore, the defrosting only by the circulation of the cool air in the refrigerator by the refrigerator compartment fan 19 is performed every time the compressor 15 is stopped. The defrosting can be performed without using a conventional electric heater. The auxiliary throttle mechanism 35 connected in parallel with the on-off valve 23 serves as a refrigerant bypass passage for preventing the pressure on the high pressure side upstream of the on-off valve 23 from becoming abnormally high when the refrigerant is charged into the refrigerator evaporator 17. It is.
【００２４】一方、冷凍室蒸発器１８は従来と同様に電
気ヒータで行うが、一般に着霜の原因となる冷蔵室２や
低温野菜室３と分離しているため、１つの蒸発器で冷蔵
室及び冷凍室を冷却するタイプの冷蔵庫に比べ除霜回数
は大幅に低減できる。つまり、冷蔵室蒸発器１７と冷蔵
室ファン１９及び冷凍室蒸発器１８と冷凍室ファン２０
を配置し、冷蔵温度帯空間４０と冷凍温度帯空間５０を
独立させて冷却するこのタイプの冷蔵庫では、冷蔵温度
帯空間４０では高湿度に維持しながら電力を必要とせず
短時間での除霜ができ、冷凍温度帯空間５０では除霜に
要する消費電力量が大幅に低減できることになる。そし
て、除霜が終了し、冷蔵温度帯空間４０又は冷凍温度帯
空間５０の庫内温度が所定温度まで上昇したら圧縮機１
５を起動し、冷蔵室蒸発器１７、冷凍室蒸発器１８がそ
れぞれ所定温度まで冷却された後、冷蔵室ファン１９、
冷凍室ファン２０を起動させ、各部屋を冷却し、以降同
様なサイクルを繰り返す。On the other hand, the freezer evaporator 18 is operated by an electric heater as in the prior art. However, since the freezer evaporator 18 is generally separated from the refrigerator compartment 2 and the low-temperature vegetable compartment 3 which cause frost, the refrigerator compartment evaporator 18 can be cooled by one evaporator. Also, the number of times of defrosting can be significantly reduced as compared with a refrigerator of a type that cools a freezer compartment. That is, the refrigerator compartment evaporator 17 and the refrigerator compartment fan 19 and the freezer compartment evaporator 18 and the freezer compartment fan 20
In this type of refrigerator in which the refrigerated temperature zone space 40 and the freezing temperature zone space 50 are independently cooled, defrosting in a short time without requiring power while maintaining high humidity in the refrigerated temperature zone space 40 In the freezing temperature zone space 50, the power consumption required for defrosting can be significantly reduced. When the defrosting is completed and the temperature in the refrigerator temperature zone space 40 or the freezing temperature zone space 50 rises to a predetermined temperature, the compressor 1
5 is started, and after the refrigerator compartment evaporator 17 and the freezer compartment evaporator 18 are each cooled to a predetermined temperature, the refrigerator compartment fan 19,
The freezing room fan 20 is activated to cool each room, and the same cycle is repeated thereafter.
【００２５】図５には、本発明の第２の実施の形態を示
す。本実施の形態では、冷蔵室蒸発器１７と冷凍室蒸発
器１８を連通する連結パイプ２４に、圧縮機１５の運転
時（圧縮機吸込みが低圧）に”開”となり、圧縮機１５
の停止時に”閉”となる差圧弁２１が設けられている。
圧縮機１５が起動すると冷媒は圧縮機１５吸込部の低圧
信号を受けて差圧弁２１が開き、圧縮機１５から吐出さ
れた冷媒が、凝縮器１６→絞り機構２２→冷蔵室蒸発器
１７→差圧弁２１→冷凍室蒸発器１８を通り、再び圧縮
機１５に戻る冷凍サイクルを構成し、第１の実施の形態
と同様に各部屋が冷却される。つまり、圧縮機１５は各
部屋に配置された温度センサの出力と設定温度に応じて
冷蔵温度帯空間４０と冷凍温度帯空間５０のいずれか一
方の温度帯となるよう回転数が設定され、冷蔵室ファン
１９と冷凍室ファン２０は温度センサの出力に応じてそ
れぞれ回転数を可変することで各部屋の温度調節を行
う。そして、冷蔵温度帯空間４０と冷凍温度帯空間５０
の冷却が進み、それぞれ設定温度に達し、圧縮機１５及
び冷蔵室ファン１９、冷凍室ファン２０が停止すると、
圧縮機１５吸込部が高圧となって差圧弁２１は”閉”と
なって停止する。この停止状態では絞り機構２２から上
流側の凝縮器１６、圧縮機１５が高温高圧となり、絞り
機構２２から下流側の冷蔵室蒸発器１７と冷凍室蒸発器
１８は低温低圧となって、高温高圧側の冷媒は低温低圧
側へ流れようとする。このとき、差圧弁２１は”閉”と
なっているため、高温高圧冷媒は絞り機構２２を通って
徐々に冷蔵室蒸発器１７に流れ込む。したがって、冷蔵
室蒸発器１７の温度は上昇し、除霜が行われる。また、
このとき、所定時間経過後あるいは所定温度まで達した
ら冷蔵室ファン１９を一定時間駆動させるとさらに除霜
が促進される。したがって、第１の実施の形態の場合と
異なり、圧縮機１５の停止毎に冷媒充填除霜が行われる
ことになる。なお、開閉弁２３あるいは差圧弁２１と冷
凍室蒸発器１８を接続する連結パイプ２４にも着霜が発
生するため、この部分に断熱を施すか断熱壁に埋設し、
庫内露出部分には除霜時に通電するヒータを巻き付ける
ことが望ましい。FIG. 5 shows a second embodiment of the present invention. In the present embodiment, the connecting pipe 24 communicating the refrigerator compartment evaporator 17 and the freezer compartment evaporator 18 is opened when the compressor 15 is operating (compressor suction is low pressure), and the compressor 15
Is provided with a differential pressure valve 21 which is "closed" when the operation is stopped.
When the compressor 15 starts, the refrigerant receives the low pressure signal of the compressor 15 suction part, the differential pressure valve 21 opens, and the refrigerant discharged from the compressor 15 is discharged from the condenser 16 → the throttle mechanism 22 → the refrigerator compartment evaporator 17 → the refrigerant. A refrigeration cycle is configured to return from the pressure valve 21 to the compressor 15 through the freezer evaporator 18 and return to the compressor 15, and each room is cooled similarly to the first embodiment. That is, the rotation speed of the compressor 15 is set so as to be in one of the refrigeration temperature zone space 40 and the freezing temperature zone space 50 in accordance with the output of the temperature sensor disposed in each room and the set temperature. The room fan 19 and the freezing room fan 20 adjust the temperature of each room by varying the number of revolutions according to the output of the temperature sensor. Then, the refrigerated temperature zone space 40 and the frozen temperature zone space 50
When the cooling of the compressor 15 reaches the set temperature, and the compressor 15, the refrigerator compartment fan 19, and the freezer compartment fan 20 stop,
The suction pressure of the compressor 15 becomes high, and the differential pressure valve 21 is closed and stopped. In this stop state, the condenser 16 and the compressor 15 on the upstream side from the expansion mechanism 22 have a high temperature and a high pressure, and the refrigerator evaporator 17 and the freezing chamber evaporator 18 on the downstream side from the expansion mechanism 22 have a low temperature and a low pressure. Side refrigerant tends to flow to the low temperature and low pressure side. At this time, since the differential pressure valve 21 is “closed”, the high-temperature and high-pressure refrigerant gradually flows into the refrigerator compartment evaporator 17 through the throttle mechanism 22. Therefore, the temperature of the refrigerator evaporator 17 rises, and defrosting is performed. Also,
At this time, after the predetermined time has elapsed or when the temperature has reached the predetermined temperature, the refrigerating compartment fan 19 is driven for a predetermined time to further promote defrosting. Therefore, unlike the case of the first embodiment, the refrigerant filling and defrosting is performed every time the compressor 15 is stopped. In addition, since frost also occurs on the connection pipe 24 connecting the on-off valve 23 or the differential pressure valve 21 and the freezer evaporator 18, heat insulation may be performed on this portion or embedded in a heat insulating wall.
It is desirable to wind a heater that is energized at the time of defrosting around the exposed part in the refrigerator.
【００２６】図６には、本発明の第３の実施の形態を示
す。本実施の形態では、絞り機構２２と並列にバイパス
弁２７が接続されている。バイパス弁２７を”開”にす
ると冷蔵室蒸発器１７への高温冷媒流入を促進すること
ができる。FIG. 6 shows a third embodiment of the present invention. In the present embodiment, a bypass valve 27 is connected in parallel with the throttle mechanism 22. When the bypass valve 27 is opened, the flow of the high-temperature refrigerant into the refrigerator compartment evaporator 17 can be promoted.
【００２７】上述したように、各実施の形態によれば、
冷蔵室蒸発器１７には従来用いていた除霜用電気ヒータ
は不要となり、圧縮機１５の停止時に冷蔵室ファン１９
を駆動することによって庫内は食品の鮮度保存に良い高
湿度の冷蔵空間が得られるとともに、任意に高温高圧冷
媒を冷蔵室蒸発器１７に充填することができ、短時間で
の除霜が可能となる。しかも冷凍室蒸発器１８の除霜は
従来より大幅に周期延長ができ、除霜周期の最適化を図
ることで消費電力量の低減が可能となり、各蒸発器は着
霜状態を想定した最適なフィンピッチ構成にできるため
小型化を図ることができる。As described above, according to each embodiment,
The refrigerating room evaporator 17 does not require the electric heater for defrosting which has been conventionally used, and the refrigerating room fan 19 when the compressor 15 is stopped.
By driving the refrigerator, a high-humidity refrigerated space that is good for preserving the freshness of food can be obtained inside the refrigerator, and high-temperature and high-pressure refrigerant can be arbitrarily filled in the refrigerator evaporator 17 for quick defrosting. Becomes In addition, the defrosting of the freezing room evaporator 18 can be greatly extended compared with the conventional one, and the power consumption can be reduced by optimizing the defrosting period. Because of the fin pitch configuration, miniaturization can be achieved.
【００２８】[0028]
【発明の効果】以上説明したように、請求項１記載の発
明によれば、冷蔵室蒸発器の除霜時には、圧縮機の稼動
状態において冷凍室蒸発器への冷媒の供給を停止して前
記冷蔵室蒸発器へ冷媒を滞留させるように構成したた
め、短時間で冷蔵室蒸発器の完全除霜を行うことができ
て、冷蔵室蒸発器には除霜ヒータが不要となり、これに
加えて、冷凍室蒸発器の除霜は従来より大幅に周期延長
ができるので、消費電力量を低減することができる。ま
た、冷蔵室蒸発器及び冷凍室蒸発器は、着霜状態を想定
した最適なフィンピッチ構成にできるので、小型化を図
ることができる。As described above, according to the first aspect of the present invention, when defrosting the refrigerator compartment evaporator, the supply of the refrigerant to the freezer compartment evaporator is stopped while the compressor is operating. Since the refrigerant is stored in the refrigerator evaporator, complete defrosting of the refrigerator evaporator can be performed in a short time, and the refrigerator evaporator does not require a defrost heater. Since the cycle of defrosting of the freezer evaporator can be greatly extended as compared with the conventional case, the power consumption can be reduced. In addition, since the refrigerator compartment evaporator and the freezer compartment evaporator can have an optimal fin pitch configuration assuming a frosted state, downsizing can be achieved.
【００２９】請求項２記載の発明によれば、前記冷蔵室
蒸発器と前記冷凍室蒸発器の連結パイプに開閉弁を設
け、前記冷蔵室蒸発器の除霜時に、前記開閉弁は前記圧
縮機を停止する所定時間前に閉とするように構成したた
め、短時間で確実に冷蔵室蒸発器の完全除霜を行うこと
ができる。According to the second aspect of the present invention, an opening / closing valve is provided in a connecting pipe between the refrigerator compartment evaporator and the freezer compartment evaporator, and the decompression unit operates the compressor when the refrigerator compartment evaporator is defrosted. Is configured to be closed a predetermined time before stopping, the complete defrosting of the refrigerator compartment evaporator can be reliably performed in a short time.
【００３０】請求項３記載の発明によれば、前記冷蔵室
蒸発器と前記冷凍室蒸発器の連結パイプに開閉弁を設
け、前記冷蔵室蒸発器の除霜時に、前記開閉弁を閉とし
た後、前記冷蔵室蒸発器が所定温度に達した時に前記圧
縮機を停止するように構成したため、短時間でより確実
に冷蔵室蒸発器の完全除霜を行うことができる。According to the third aspect of the present invention, an on-off valve is provided in a connecting pipe between the refrigerator compartment evaporator and the freezer compartment evaporator, and the on-off valve is closed when the refrigerator compartment evaporator is defrosted. Thereafter, the compressor is stopped when the temperature of the refrigerator evaporator reaches a predetermined temperature, so that the complete defrosting of the refrigerator evaporator can be performed more reliably in a short time.
【００３１】請求項４記載の発明によれば、冷蔵室蒸発
器と冷凍室蒸発器の連結パイプに圧縮機の停止時に閉と
なる差圧弁を設けたため、圧縮機の停止毎に、高温高圧
の冷媒が絞り機構を通って徐々に冷蔵室蒸発器に流れ込
んで、冷蔵室蒸発器の除霜を行うことができる。According to the fourth aspect of the present invention, a differential pressure valve that closes when the compressor is stopped is provided in the connecting pipe between the refrigerator compartment evaporator and the freezer compartment evaporator. The refrigerant gradually flows into the refrigerating compartment evaporator through the throttle mechanism, and the defrosting of the refrigerating compartment evaporator can be performed.
【００３２】請求項５記載の発明によれば、前記圧縮機
の停止後、前記冷蔵室蒸発器の温度が所定温度に達した
時に前記冷蔵室ファンを駆動するように構成したため、
圧縮機停止毎の冷蔵室蒸発器の除霜を促進することがで
きるとともに冷蔵室内を食品の鮮度保存に適した高湿度
にすることができる。According to the fifth aspect of the invention, after the compressor is stopped, the refrigerator compartment fan is driven when the temperature of the refrigerator compartment evaporator reaches a predetermined temperature.
The defrosting of the refrigerator evaporator every time the compressor is stopped can be promoted, and the refrigerator compartment can be kept at a high humidity suitable for preserving the freshness of food.
【００３３】請求項６記載の発明によれば、前記圧縮機
の停止後、所定時間経過後に前記冷蔵室ファンを駆動す
るように構成したため、上記請求項５記載の発明の効果
と略同様の効果がある。According to the sixth aspect of the present invention, since the refrigerating compartment fan is driven after a lapse of a predetermined time after the stop of the compressor, substantially the same effects as the effects of the fifth aspect of the present invention are provided. There is.
【００３４】請求項７記載の発明によれば、前記絞り機
構と並列にバイパス弁を接続し、該バイパス弁を前記圧
縮機の停止時から所定時間だけ開とするように構成した
ため、圧縮機の停止時に、冷蔵室蒸発器への高温高圧冷
媒の流入が促進されて、圧縮機停止毎の冷蔵室蒸発器の
除霜を短時間で行うことができる。According to the seventh aspect of the present invention, a bypass valve is connected in parallel with the throttle mechanism, and the bypass valve is opened for a predetermined time from the time when the compressor is stopped. When the compressor is stopped, the flow of the high-temperature and high-pressure refrigerant into the refrigerator compartment evaporator is promoted, and the defrosting of the refrigerator compartment evaporator every time the compressor is stopped can be performed in a short time.
【００３５】請求項８記載の発明によれば、前記開閉弁
及び前記差圧弁は前記冷蔵室内に配置するとともに前記
連結パイプの前記冷蔵室蒸発器側に設けたため、開閉弁
又は差圧弁自身及び開閉弁又は差圧弁と冷蔵室蒸発器間
の連結パイプへの着霜を抑えることができる。According to the eighth aspect of the present invention, the on-off valve and the differential pressure valve are disposed in the refrigerator compartment and are provided on the connecting pipe side of the refrigerator compartment evaporator. Frost on the connecting pipe between the valve or the differential pressure valve and the refrigerator evaporator can be suppressed.
【００３６】請求項９記載の発明によれば、前記開閉弁
又は前記差圧弁と前記冷凍室蒸発器との間の前記連結パ
イプは、断熱を施すか又は断熱壁に埋設するかの何れか
に構成したため、開閉弁又は差圧弁と冷凍室蒸発器間の
連結パイプへの着霜を防止することができる。According to the ninth aspect of the present invention, the connecting pipe between the on-off valve or the differential pressure valve and the freezer evaporator is either heat-insulated or embedded in a heat-insulating wall. With this configuration, it is possible to prevent frost on the connecting pipe between the on-off valve or the differential pressure valve and the freezer evaporator.
【００３７】請求項１０記載の発明によれば、前記冷蔵
室及び前記冷凍室の庫内に露出する前記連結パイプにヒ
ータを設けたため、連結パイプへの着霜を確実に防止す
ることができる。According to the tenth aspect of the present invention, since a heater is provided in the connecting pipe exposed in the refrigerator and the freezer compartment, frost on the connecting pipe can be reliably prevented.
【図１】本発明に係る冷蔵庫の第１の実施の形態の内部
構成を示す断面図である。FIG. 1 is a sectional view showing an internal configuration of a refrigerator according to a first embodiment of the present invention.
【図２】上記第１の実施の形態の冷凍サイクル構成を示
す系統図である。FIG. 2 is a system diagram showing a configuration of a refrigeration cycle according to the first embodiment.
【図３】上記第１の実施の形態において開閉弁が開のと
きの等価的な冷凍サイクル構成を示す系統図である。FIG. 3 is a system diagram showing an equivalent refrigeration cycle configuration when the on-off valve is open in the first embodiment.
【図４】上記第１の実施の形態における除霜方法を説明
するためのタイミングチャートである。FIG. 4 is a timing chart for explaining a defrosting method according to the first embodiment.
【図５】本発明の第２の実施の形態における冷凍サイク
ル構成を示す系統図である。FIG. 5 is a system diagram illustrating a refrigeration cycle configuration according to a second embodiment of the present invention.
【図６】本発明の第３の実施の形態における冷凍サイク
ル構成を示す系統図である。FIG. 6 is a system diagram illustrating a refrigeration cycle configuration according to a third embodiment of the present invention.
２ 冷蔵室 ４ 第１冷凍室 ５ 第２冷凍室 １０，１１，１２，１３ 開閉扉 １５ 圧縮機 １６ 凝縮器 １７ 冷蔵室蒸発器 １８ 冷凍室蒸発器 １９ 冷蔵室ファン ２０ 冷凍室ファン ２１ 差圧弁 ２２ 絞り機構 ２３ 開閉弁 ２４ 連結パイプ ２７ バイパス弁 ４０ 冷蔵温度帯空間 ５０ 冷凍温度帯空間 2 Refrigeration room 4 1st freezing room 5 2nd freezing room 10, 11, 12, 13 Door 15 Compressor 16 Condenser 17 Refrigerator evaporator 18 Refrigerator evaporator 19 Refrigerator fan 20 Refrigerator fan 21 Differential pressure valve 22 Throttle mechanism 23 On-off valve 24 Connecting pipe 27 Bypass valve 40 Refrigerated temperature zone space 50 Freezing temperature zone space
Claims (10)
構成された各部屋を、冷蔵室と冷凍室に区画し、前記冷
蔵室には冷蔵室蒸発器と冷蔵室ファンを設置し前記冷凍
室には冷凍室蒸発器と冷凍室ファンを設置し、冷媒が圧
縮機、凝縮器、絞り機構、前記冷蔵室蒸発器、前記冷凍
室蒸発器の順に流れる冷蔵庫において、前記冷蔵室蒸発
器の除霜時には、前記圧縮機の稼動状態において前記冷
凍室蒸発器への冷媒の供給を停止して前記冷蔵室蒸発器
へ冷媒を滞留させるように構成してなることを特徴とす
る冷蔵庫。1. A multi-stage room having doors that can be opened and closed according to a target temperature is divided into a refrigerator compartment and a freezer compartment, and a refrigerator compartment evaporator and a refrigerator compartment fan are installed in the refrigerator compartment, and In the refrigerator, a freezer evaporator and a freezer fan are installed, and in a refrigerator in which refrigerant flows in the order of a compressor, a condenser, a throttle mechanism, the refrigerating room evaporator, and the freezing room evaporator, the refrigerating room evaporator is removed. A refrigerator characterized in that the supply of refrigerant to the freezer compartment evaporator is stopped during the operation of the compressor during frost, and the refrigerant is retained in the refrigerator compartment evaporator.
連結パイプに開閉弁を設け、前記冷蔵室蒸発器の除霜時
に、前記開閉弁は前記圧縮機を停止する所定時間前に閉
とするように構成してなることを特徴とする請求項１記
載の冷蔵庫。2. An on-off valve is provided in a connecting pipe between the refrigerator compartment evaporator and the freezer compartment evaporator, and when the refrigerator compartment evaporator is defrosted, the on-off valve is closed a predetermined time before the compressor is stopped. The refrigerator according to claim 1, wherein the refrigerator is configured to be configured as follows.
連結パイプに開閉弁を設け、前記冷蔵室蒸発器の除霜時
に、前記開閉弁を閉とした後、前記冷蔵室蒸発器が所定
温度に達した時に前記圧縮機を停止するように構成して
なることを特徴とする請求項１記載の冷蔵庫。3. An on-off valve is provided in a connecting pipe between the refrigerator compartment evaporator and the freezer compartment evaporator, and when the refrigerating compartment evaporator is defrosted, the on-off valve is closed. The refrigerator according to claim 1, wherein the compressor is stopped when a predetermined temperature is reached.
構成された各部屋を、冷蔵室と冷凍室に区画し、前記冷
蔵室には冷蔵室蒸発器と冷蔵室ファンを設置し前記冷凍
室には冷凍室蒸発器と冷凍室ファンを設置し、冷媒が圧
縮機、凝縮器、絞り機構、前記冷蔵室蒸発器、前記冷凍
室蒸発器の順に流れる冷蔵庫において、前記冷蔵室蒸発
器と前記冷凍室蒸発器の連結パイプに前記圧縮機の停止
時に閉となる差圧弁を設けてなることを特徴とする冷蔵
庫。4. A multi-stage room having doors that can be opened and closed according to target temperatures is divided into a refrigerator room and a freezer room, and a refrigerator evaporator and a refrigerator fan are installed in the refrigerator room, and In the refrigerator, a freezer evaporator and a freezer fan are installed, and in a refrigerator in which a refrigerant flows in the order of a compressor, a condenser, a throttle mechanism, the refrigerator compartment evaporator, and the refrigerator compartment evaporator, the refrigerator compartment evaporator and the refrigerator A refrigerator characterized in that a connecting pipe of a freezer evaporator is provided with a differential pressure valve which is closed when the compressor is stopped.
の温度が所定温度に達した時に前記冷蔵室ファンを駆動
するように構成してなることを特徴とする請求項４記載
の冷蔵庫。5. The refrigerator according to claim 4, wherein after the compressor is stopped, the refrigerator compartment fan is driven when the temperature of the refrigerator compartment evaporator reaches a predetermined temperature. .
前記冷蔵室ファンを駆動するように構成してなることを
特徴とする請求項４記載の冷蔵庫。6. The refrigerator according to claim 4, wherein the refrigerator compartment fan is driven after a predetermined time elapses after the compressor is stopped.
し、該バイパス弁を前記圧縮機の停止時から所定時間だ
け開とするように構成してなることを特徴とする請求項
４記載の冷蔵庫。7. The apparatus according to claim 4, wherein a bypass valve is connected in parallel with said throttle mechanism, and said bypass valve is opened for a predetermined time from when the compressor is stopped. refrigerator.
内に配置するとともに前記連結パイプの前記冷蔵室蒸発
器側に設けてなることを特徴とする請求項２，３又は４
記載の冷蔵庫。8. The refrigerating chamber according to claim 2, wherein the on-off valve and the differential pressure valve are arranged in the refrigerating chamber and provided on the refrigerating chamber evaporator side of the connecting pipe.
The refrigerator as described.
蒸発器との間の前記連結パイプは、断熱を施すか又は断
熱壁に埋設するかの何れかに構成してなることを特徴と
する請求項２，３又は４記載の冷蔵庫。9. The connecting pipe between the on-off valve or the differential pressure valve and the freezer evaporator is configured to be either heat-insulated or embedded in a heat-insulating wall. The refrigerator according to claim 2, 3 or 4, wherein:
出する前記連結パイプにヒータを設けてなることを特徴
とする請求項２，３又は４記載の冷蔵庫。10. The refrigerator according to claim 2, wherein a heater is provided on the connecting pipe exposed inside the refrigerator compartment and the freezer compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7215497A JPH10267504A (en) | 1997-03-25 | 1997-03-25 | Refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7215497A JPH10267504A (en) | 1997-03-25 | 1997-03-25 | Refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10267504A true JPH10267504A (en) | 1998-10-09 |
Family
ID=13481068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7215497A Abandoned JPH10267504A (en) | 1997-03-25 | 1997-03-25 | Refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10267504A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006118849A (en) * | 2004-09-22 | 2006-05-11 | Denso Corp | Ejector type refrigeration cycle |
| CN100453923C (en) * | 2005-10-18 | 2009-01-21 | 三星电子株式会社 | Air conditioner |
| CN103032983A (en) * | 2013-01-09 | 2013-04-10 | 唐玉敏 | Heat utilization system with two stages of evaporators |
| CN104132474A (en) * | 2014-07-14 | 2014-11-05 | 珠海格力电器股份有限公司 | Environment conditioning device for low-temperature laboratory |
| CN108106034A (en) * | 2017-11-10 | 2018-06-01 | 华为数字技术（苏州）有限公司 | Refrigerating plant and its control method, device, refrigeration system |
| CN108458534A (en) * | 2017-02-21 | 2018-08-28 | 松下电器产业株式会社 | Refrigerator and its operation method |
| WO2021194085A1 (en) * | 2020-03-26 | 2021-09-30 | 삼성전자주식회사 | Refrigerator and control method therefor |
| WO2023176005A1 (en) * | 2022-03-15 | 2023-09-21 | 日立グローバルライフソリューションズ株式会社 | Refrigerator |
-
1997
- 1997-03-25 JP JP7215497A patent/JPH10267504A/en not_active Abandoned
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006118849A (en) * | 2004-09-22 | 2006-05-11 | Denso Corp | Ejector type refrigeration cycle |
| US8186180B2 (en) | 2004-09-22 | 2012-05-29 | Denso Corporation | Ejector-type refrigerant cycle device |
| CN100453923C (en) * | 2005-10-18 | 2009-01-21 | 三星电子株式会社 | Air conditioner |
| CN103032983A (en) * | 2013-01-09 | 2013-04-10 | 唐玉敏 | Heat utilization system with two stages of evaporators |
| CN104132474A (en) * | 2014-07-14 | 2014-11-05 | 珠海格力电器股份有限公司 | Environment conditioning device for low-temperature laboratory |
| CN104132474B (en) * | 2014-07-14 | 2017-01-25 | 珠海格力电器股份有限公司 | Environment conditioning device for low-temperature laboratory |
| CN108458534A (en) * | 2017-02-21 | 2018-08-28 | 松下电器产业株式会社 | Refrigerator and its operation method |
| CN108458534B (en) * | 2017-02-21 | 2021-02-09 | 松下电器产业株式会社 | Refrigerator and operation method thereof |
| CN108106034A (en) * | 2017-11-10 | 2018-06-01 | 华为数字技术（苏州）有限公司 | Refrigerating plant and its control method, device, refrigeration system |
| WO2021194085A1 (en) * | 2020-03-26 | 2021-09-30 | 삼성전자주식회사 | Refrigerator and control method therefor |
| WO2023176005A1 (en) * | 2022-03-15 | 2023-09-21 | 日立グローバルライフソリューションズ株式会社 | Refrigerator |
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