JP4246585B2 - Showcase - Google Patents

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Publication number
JP4246585B2
JP4246585B2 JP2003334084A JP2003334084A JP4246585B2 JP 4246585 B2 JP4246585 B2 JP 4246585B2 JP 2003334084 A JP2003334084 A JP 2003334084A JP 2003334084 A JP2003334084 A JP 2003334084A JP 4246585 B2 JP4246585 B2 JP 4246585B2
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Japan
Prior art keywords
showcase
evaporating dish
evaporating
drain water
evaporation
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Expired - Fee Related
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JP2003334084A
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Japanese (ja)
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JP2005098627A (en
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昭治 菊地
彰 仲摩
悟 望月
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Toshiba Carrier Corp
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Toshiba Carrier Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14Collecting or removing condensed and defrost water; Drip trays
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • F25D23/003General constructional features for cooling refrigerating machinery
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2321/00Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/141Removal by evaporation
    • F25D2321/1412Removal by evaporation using condenser heat or heat of desuperheaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2321/00Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/145Collecting condense or defrost water; Removing condense or defrost water characterised by multiple collecting pans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2323/00General constructional features not provided for in other groups of this subclass
    • F25D2323/002Details for cooling refrigerating machinery
    • F25D2323/0026Details for cooling refrigerating machinery characterised by the incoming air flow
    • F25D2323/00264Details for cooling refrigerating machinery characterised by the incoming air flow through the front bottom part
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2323/00General constructional features not provided for in other groups of this subclass
    • F25D2323/002Details for cooling refrigerating machinery
    • F25D2323/0027Details for cooling refrigerating machinery characterised by the out-flowing air
    • F25D2323/00271Details for cooling refrigerating machinery characterised by the out-flowing air from the back bottom
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2323/00General constructional features not provided for in other groups of this subclass
    • F25D2323/002Details for cooling refrigerating machinery
    • F25D2323/0028Details for cooling refrigerating machinery characterised by the fans
    • F25D2323/00281Two or more fans

Landscapes

  • Freezers Or Refrigerated Showcases (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)

Description

本発明はショーケースに係わり、特にドレン水蒸発用を兼ねる凝縮器用ファンの制御の改善と、機械室の構成要素の配置の改良を図ったショーケースに関する。   The present invention relates to a showcase, and more particularly to a showcase that improves the control of a condenser fan that also serves to evaporate drain water and improves the arrangement of components in a machine room.

一般に冷却された貯蔵室とこの貯蔵室を冷却するための冷凍サイクルが設けられたショーケースにおいて、貯蔵室を冷却し冷凍サイクルの一部を構成する蒸発器から生じるドレン水を蒸発させる蒸発皿を設け、この蒸発皿を冷凍サイクルの一部を構成する凝縮器の後方に設けられた凝縮器用ファンの背面に配置し、凝縮器用ファンを蒸発皿上のドレン水の蒸発促進に兼用したものがある(特許文献1)。しかし、この特許文献1のものは、凝縮器用ファンによる温風ですべてのドレン水を蒸発させるものであり、蒸発皿上のドレン水の蒸発面積が大きく取れる場合は、このような手法が可能であるが、小形化されたショーケースでは、蒸発皿の面積が小さく、単に、凝縮器用ファンによる温風を当てるだけでは全てのドレン水を蒸発させることは困難である。   Generally, in a showcase provided with a cooled storage room and a refrigeration cycle for cooling the storage room, an evaporating dish for cooling the storage room and evaporating drain water generated from an evaporator constituting a part of the refrigeration cycle is provided. There is one in which this evaporating dish is disposed on the back of a condenser fan provided behind a condenser constituting a part of the refrigeration cycle, and the condenser fan is also used for promoting the evaporation of drain water on the evaporating dish. (Patent Document 1). However, this Patent Document 1 evaporates all drain water with warm air from a condenser fan, and such a method is possible when the evaporation area of the drain water on the evaporating dish is large. However, in a miniaturized showcase, the area of the evaporating dish is small, and it is difficult to evaporate all the drain water simply by applying hot air from a condenser fan.

また、凝縮器の後方に設けられた凝縮器用ファンの背面に蒸発皿を配置し、凝縮器用ファンを蒸発皿上のドレン水の蒸発促進に兼用し、これに加えて、蒸発皿には、高温冷媒が流れる蒸発パイプを配置するとともに電気ヒータを配設している(特許文献2)。しかし、特許文献2のものは、蒸発皿のドレン水が凝縮器用ファンの温風と、蒸発パイプ及び電気ヒータの放熱で蒸発される。この場合、電気ヒーターによる加温のため、その消費電力が大きく、省エネルギー効果が低いという問題がある。   In addition, an evaporating dish is placed on the back of the condenser fan provided behind the condenser, and the condenser fan is also used to promote the evaporation of drain water on the evaporating dish. An evaporation pipe through which the refrigerant flows is disposed and an electric heater is disposed (Patent Document 2). However, in Patent Document 2, the drain water in the evaporating dish is evaporated by the warm air of the condenser fan and the heat radiation of the evaporation pipe and the electric heater. In this case, there is a problem that the power consumption is large and the energy saving effect is low due to heating by the electric heater.

また、蒸発皿からオーバフローするドレン水を受けるオーバフロー用受皿を設けたショーケースはあるが、このショーケースは機械室カバーを開けて、オーバフロー用受皿を取り外して排水できるようになっていないため、不便であった(例えば、特許文献1)。
特開2003−106747号公報(段落番号[0002]、[0011]、図2) 特開2000−258038号公報(段落[0029]、[0040]、図3)
In addition, there is a showcase with an overflow tray that receives drain water that overflows from the evaporating tray. However, this showcase does not allow the drainage by opening the machine room cover and removing the overflow tray, which is inconvenient. (For example, Patent Document 1).
JP 2003-106747 A (paragraph numbers [0002], [0011], FIG. 2) JP 2000-258038 A (paragraphs [0029], [0040], FIG. 3)

本発明は上述した事情を考慮してなされたもので、省エネルギー効果の向上を図ったショーケースを提供することを目的とする。また、オーバフロー用受皿の取り外しが容易で機械室のスペース効率に向上が図れるショーケースを提供することを目的とする。   The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a showcase that improves the energy saving effect. Another object of the present invention is to provide a showcase in which the overflow tray can be easily removed and the space efficiency of the machine room can be improved.

上記目的を達成するため、本発明の1つの態様によれば、冷媒を圧縮する圧縮機、ドレン水蒸発用を兼ねる凝縮器用ファンの回転により通風され冷媒を凝縮する凝縮器、貯蔵室内を冷却する蒸発器を有する冷凍サイクルを具備したショーケースにおいて、ドレン水蒸発用の蒸発皿と、前記蒸発皿のドレン水を蒸発させる蒸発用ヒータと、前記蒸発皿の水位を検知する検知センサを設け、この検知センサで検知した水位情報に基づき、所定時間前記蒸発用ヒータには通電せず、前記凝縮器用ファンを高速回転して前記蒸発皿に送風し、ドレン水の蒸発促進を行い、所定時間経過後蒸発用ヒータに通電するように制御することを特徴とするショーケースが提供される。これにより、省エネルギー効果の向上を図ったショーケースが実現される。 In order to achieve the above object, according to one aspect of the present invention, a compressor that compresses a refrigerant, a condenser that is ventilated by rotation of a condenser fan that also serves to evaporate drain water, condenses the refrigerant, and cools the storage chamber In a showcase having a refrigeration cycle having an evaporator, an evaporating dish for evaporating drain water, an evaporating heater for evaporating the drain water in the evaporating dish, and a detection sensor for detecting the water level of the evaporating dish are provided. Based on the water level information detected by the detection sensor, the heater for evaporation is not energized for a predetermined time, the condenser fan is rotated at a high speed and blown to the evaporating dish, and the evaporation of drain water is promoted. A showcase is provided that is controlled to energize an evaporation heater. Thereby, the showcase which aimed at the improvement of an energy saving effect is implement | achieved.

本発明に係わるショーケースによれば、省エネルギー効果の向上を図ったショーケースを提供することができる。また、オーバフロー用受皿の取り外し、排水が容易で機械室のスペース効率に向上が図れるショーケースを提供することができる。   According to the showcase according to the present invention, it is possible to provide a showcase with an improved energy saving effect. In addition, it is possible to provide a showcase in which the overflow tray can be easily removed and drained, and the space efficiency of the machine room can be improved.

以下、本発明に係わるショーケースの一実施形態について添付図面を参照して説明する。   Hereinafter, an embodiment of a showcase according to the present invention will be described with reference to the accompanying drawings.

図1は本発明に係わるショーケースの斜視図、図2はその冷凍ショーケースの概念図、図3はその機械室の縦断面図である。   FIG. 1 is a perspective view of a showcase according to the present invention, FIG. 2 is a conceptual view of the refrigerated showcase, and FIG. 3 is a longitudinal sectional view of the machine room.

図1に示すように、本発明に係わるショーケース1は、その上部に正面が開放され、多数の棚板2aで仕切られた貯蔵室2と、その下部に設けられ、図2に示すような冷凍サイクル3が収容された機械室4とからなり、冷凍サイクル3の一部を構成し、貯蔵室2の裏面に配置された蒸発器5によって冷却され、冷気吹出口(図示せず)から吹出される冷気によって、貯蔵室2を冷却し、冷却後、冷気吸込口2bを介して、蒸発器5に戻り、循環するようになっている。   As shown in FIG. 1, a showcase 1 according to the present invention is provided with a storage chamber 2 that is open at the top and partitioned by a number of shelves 2 a, and a lower portion thereof, as shown in FIG. 2. It consists of a machine room 4 in which the refrigeration cycle 3 is housed, forms part of the refrigeration cycle 3, is cooled by an evaporator 5 disposed on the back surface of the storage room 2, and blows out from a cold air outlet (not shown) The storage chamber 2 is cooled by the cool air, and after cooling, returns to the evaporator 5 through the cold air inlet 2b and circulates.

図3〜図5に示すように、機械室4には、その後部に冷凍サイクル3の一部を構成する圧縮機6が配置され、その前部に凝縮器7が配置されており、さらに、この凝縮器7と圧縮機6間には、凝縮器用ファン7aが配置されている。また、圧縮機6に隣接してドレン水蒸発用の蒸発皿8が配置されている。さらに、凝縮器7とドレン水蒸発用の蒸発皿8間には、ドレン水蒸発用を兼ねる凝縮器用ファン7b(以下、兼用ファンという。)が配置されている。本実施形態では、兼用ファン7bを直線上に配置された凝縮器と蒸発皿間に設け、機器をコンパクトに配置できる。   As shown in FIGS. 3 to 5, in the machine room 4, a compressor 6 constituting a part of the refrigeration cycle 3 is disposed in the rear part thereof, and a condenser 7 is disposed in the front part thereof. A condenser fan 7 a is disposed between the condenser 7 and the compressor 6. Further, an evaporation tray 8 for drain water evaporation is disposed adjacent to the compressor 6. Further, a condenser fan 7b (hereinafter also referred to as a dual-purpose fan) that also serves as drain water evaporation is disposed between the condenser 7 and the evaporation tray 8 for drain water evaporation. In the present embodiment, the dual-purpose fan 7b is provided between the condenser and the evaporating dish arranged on a straight line, and the equipment can be arranged compactly.

蒸発皿8の上方には、貯蔵室2と機械室3を仕切り、蒸発器5から生じるドレン水を受ける庫内底板9が設けられている。ドレン水は、庫内底板9の手前側(ショーケースの前側)に設けられた庫内排水口9a、樋状に形成された導水路10を介してドレン水を機械室4の後方に配置された蒸発皿8に導くようになっている。   Above the evaporating dish 8, a storage bottom plate 9 that partitions the storage chamber 2 and the machine chamber 3 and receives drain water generated from the evaporator 5 is provided. The drain water is disposed behind the machine room 4 via the interior drain port 9a provided on the near side of the interior bottom plate 9 (the front side of the showcase) and the water conduit 10 formed like a bowl. The evaporating dish 8 is guided.

蒸発皿8には蒸発布8aが平行間隔を有して多数櫛歯状に立設され、兼用ファン7bからの温風を受けてドレン水の蒸発を促進するようになっており、さらに、蒸発皿8の底面に設けられた蒸発用ヒータ8bによって、ドレン水の蒸発を促進するようになっている。また、機械室4の横壁面側に面する蒸発皿8の一端下方には、蒸発皿8からオーバフローするドレン水を受けるオーバフロー用受皿11がその長側面11aが横壁面に沿うように前側まで伸びて配置されており、蒸発皿8からオーバフローするドレン水を、オーバフローパイプ8dを介してオーバフロー用受皿11に流すようになっている。この受皿11は機械室4の底板12上に取り外し可能(固定なし)に載置され、底板12から突出する位置決め部材12により、前方以外への動きが規制され、定位置に保たれるようになっている。   In the evaporating dish 8, evaporating cloths 8a are provided in a comb-like shape with parallel intervals, and receive warm air from the dual-purpose fan 7b to promote the evaporation of drain water. The evaporation heater 8b provided on the bottom surface of the tray 8 promotes the evaporation of drain water. An overflow tray 11 that receives drain water overflowing from the evaporating dish 8 extends to the front side of the evaporating dish 8 facing the horizontal wall surface of the machine room 4 so that its long side surface 11a is along the horizontal wall surface. The drain water that overflows from the evaporating dish 8 flows into the overflow tray 11 through the overflow pipe 8d. The saucer 11 is detachably mounted (not fixed) on the bottom plate 12 of the machine room 4, and the movement to the other side is restricted by the positioning member 12 protruding from the bottom plate 12, so that it is maintained at a fixed position. It has become.

さらに、蒸発皿8には、この蒸発皿8の水位を検出する水位センサとして常開で所定の水位を検出すると閉じるフロートスイッチ8dが設けられており、さらに、オーバフロー用受皿11には、この受皿11の水位を検出する水位センサとして常開で所定の水位を検出すると閉じるフロートスイッチ11bが設けられている。   Further, the evaporating dish 8 is provided with a float switch 8d that is normally opened and detects a predetermined water level as a water level sensor for detecting the water level of the evaporating dish 8. Further, the overflow receiving tray 11 includes As a water level sensor for detecting the water level of 11, a float switch 11 b is provided that closes when a predetermined water level is detected in the normally open state.

フロートスイッチ11は、蒸発皿8の底部にある取付け板に回動可能に取付けられ、オーバフロー用受皿11を前方から取り出す時は、奥側の内壁がフロートスイッチ11に当接し、図3中A側にフロートスイッチ11が回動し、受皿11が引き出し可能となっている。一方、受皿11を収納する時は前方からの押し込みに伴って受皿11の奥側の外壁がフロートスイッチ11に当たる。そのまま受皿11を押し込めば、図3中B側にフロートスイッチ11が回動し、所定位置まで押し込めばフロートスイッチ11は、受皿11の奥側の外壁を乗り越えて図3に示す所定の位置に復帰する。 また、図4に示すように、機械室4の前壁面を形成し、冷却空気吸込口4aが設けられた機械室カバー4aは、螺着により着脱自在になっており、さらに、凝縮器6及びオーバフロー用受皿11の短側面11cが対向している。 The float switch 11 is rotatably attached to a mounting plate at the bottom of the evaporating dish 8, and when the overflow tray 11 is taken out from the front, the inner wall on the back side contacts the float switch 11, and the A side in FIG. The float switch 11 is pivoted so that the tray 11 can be pulled out. On the other hand, when storing the tray 11, the outer wall on the back side of the tray 11 hits the float switch 11 as the tray 11 is pushed in from the front. If the tray 11 is pushed in as it is, the float switch 11 turns to the B side in FIG. 3, and if it is pushed to a predetermined position, the float switch 11 gets over the outer wall on the back side of the tray 11 and returns to the predetermined position shown in FIG. To do. Further, as shown in FIG. 4, to form a front wall of the machine room 4, the cooling air inlet 4a 1 is provided machine room cover 4a is adapted to removably by screwing, further condenser 6 And the short side surface 11c of the tray 11 for overflow is facing.

さらに、ショーケース1には、図6に示すような制御回路13が設けられており、その制御部13aには、制御器5aを介して蒸発器用ファン5aが接続され、インバータ6iを介して圧縮機6が接続され、インバータ7aiを介して凝縮器用ファン7aが接続され、インバータ7biを介して兼用ファン7bが接続されている。 In addition, the showcase 1, is provided with control circuit 13 as shown in FIG. 6, the a control unit 13a, the controller evaporator fan 5a through 5a 1 is connected, via an inverter 6i The compressor 6 is connected, the condenser fan 7a is connected via the inverter 7ai, and the dual purpose fan 7b is connected via the inverter 7bi.

また、制御部13aには、蒸発皿8のフロートスイッチ8cが接続され、オーバフロー用受皿11のフロートスイッチ11b、棚板2aの下部に設けられ、間接的に庫内温度を検知する棚板温度センサ2aが接続される。さらに、制御部13aにはトライアック8bを介して蒸発用ヒータ8b、オーバフロー用受皿11のフロートスイッチ11bの水位情報に基づき作動する警報ブザー8e及び満水ランプ8fが接続されている。また、制御部13には、トライアック2aを介して、貯蔵室2の棚板2aを加熱するために設けられた棚ヒータ2a、冷気制御用ダンパ2cの開閉を制御するダンパ制御器2cが接続されている。 Further, a float switch 8c of the evaporating dish 8 is connected to the control unit 13a, and is provided below the float switch 11b of the overflow tray 11 and the shelf 2a, and a shelf temperature sensor that indirectly detects the internal temperature. 2a 1 is connected. Furthermore, the evaporation heater 8b through the triac 8b 1, an alarm buzzer 8e and full water lamp 8f operates based on the level information of the float switch 11b of the overflow pans 11 are connected to the control unit 13a. The controller 13 also includes a damper controller 2c 1 that controls the opening and closing of a shelf heater 2a 3 and a cool air control damper 2c provided to heat the shelf 2a of the storage chamber 2 via the triac 2a 2. Is connected.

さらに、制御部13aには、上述の接続機器の各々の動作を制御するための入力手段としてユーザーが手動操作可能な庫内温度設定器13b、加熱・冷却切替スイッチ13cが接続されている。   Furthermore, the controller 13a is connected with an internal temperature setting device 13b and a heating / cooling changeover switch 13c that can be manually operated by the user as input means for controlling the operation of each of the above-mentioned connected devices.

なお、ドレン水の蒸発、貯蔵室の冷却時には、相当量の電流が流れているので、棚板2aの温度を検知して展示商品を加温させるための棚ヒータ2aの通電率を徐々に上げ、突入電流を押さえて加温を行うように制御するのが好ましい。また、図2中、符号14は膨張弁である。この膨脹弁14も電動式であり、制御部13aによりその開度が制御可能となっている。 In addition, since a considerable amount of electric current flows during drain water evaporation and storage chamber cooling, the energization rate of the shelf heater 2a 3 for detecting the temperature of the shelf 2a and heating the displayed products is gradually increased. It is preferable to control to increase the temperature while suppressing the inrush current. In FIG. 2, reference numeral 14 denotes an expansion valve. The expansion valve 14 is also electrically operated, and its opening degree can be controlled by the control unit 13a.

次に本発明に係わるショーケースのドレン水の蒸発関連要素の制御について図7に示す制御フローチャートに沿って説明する。   Next, the control of the drainage water-related elements of the showcase according to the present invention will be described with reference to the control flowchart shown in FIG.

図3に示すように、ショーケースが運転されると圧縮機6が作動し、貯蔵室2の裏面に配置された蒸発器5によって冷却され、冷気吹出口から吹出される冷気によって、貯蔵室2を冷却し、冷却後、冷気吸込口2bを介して、蒸発器5に戻る。一方、蒸発器5には空気中に含まれる水分が霜となって蒸発器5に付着するため、定期的にダンパ制御器2cを介して冷気制御用ダンパ2cを閉じ、制御器5aを介して蒸発器用ファンモータ5aを停止させ、除霜ヒータを付勢しあるいは自然除霜により、除霜が行われる。蒸発器5の除霜によるドレン水は、図3に示すように、蒸発皿8に導かれる。 As shown in FIG. 3, when the showcase is operated, the compressor 6 is activated, cooled by the evaporator 5 disposed on the back surface of the storage chamber 2, and stored in the storage chamber 2 by the cold air blown out from the cold air outlet. After cooling, it returns to the evaporator 5 through the cold air inlet 2b. On the other hand, since moisture contained in the air becomes frost and adheres to the evaporator 5 in the evaporator 5, the cooler control damper 2 c is periodically closed via the damper controller 2 c 1 , and the controller 5 a 1 is connected. Then, the evaporator fan motor 5a is stopped, and the defrosting is performed by energizing the defrosting heater or by natural defrosting. The drain water by defrosting of the evaporator 5 is guided to the evaporating dish 8 as shown in FIG.

このような制御は制御部13aのCPUがROM及びRAMとデータのやりとりを行いながらROMに記憶されている制御プログラムを実行することで実施される。制御プログラムによる動作を図7に基づき説明する。   Such control is performed by the CPU of the control unit 13a executing a control program stored in the ROM while exchanging data with the ROM and RAM. The operation by the control program will be described with reference to FIG.

まず、運転中か否かを判断する(S1)。運転中であれば(Yes)、庫内温度(棚板温度)と設定温度の差から、圧縮機6のインバータ6iの周波数F(圧縮機6の回転数)を決定する(S2)。 First, it is determined whether or not the vehicle is in operation (S1). If it is in operation (Yes), the frequency F 6 of the inverter 6i of the compressor 6 (the rotation speed of the compressor 6) is determined from the difference between the internal temperature (shelf temperature) and the set temperature (S2).

インバータ6iの周波数Fに基づき、インバータ7biの出力周波数F(兼用ファン7bの回転数)、インバータ7aiの出力周波数F(ファン7aの回転数)を決定する(S3)。続いて、蒸発皿8のフロートスイッチ8cがONか否かを判断する(S4)。 Based on the frequency F 6 of inverter 6i, (rotational speed of the combined fan 7b) the output frequency F b of the inverter 7Bi, determines the output frequency F a of the inverter 7AI (rotational speed of the fan 7a) (S3). Subsequently, it is determined whether or not the float switch 8c of the evaporating dish 8 is ON (S4).

フロートスイッチ8cがON(Yes)、すなわち、常開のフロートスイッチ8cが蒸発皿8の所定の水位を検知した状態にある場合、ドレン水の蒸発が不十分であると判断し、ドレン水の発生を抑制するように圧縮機6のインバータ6iの周波数F(圧縮機6の回転数)を所定値αだけ低下させた値にセットする(S5)。すなわち、圧縮機6の回転数を低下させれば、蒸発温度が上昇し、蒸発器5での氷結を抑制できる。 When the float switch 8c is ON (Yes), that is, when the normally open float switch 8c has detected a predetermined water level in the evaporating dish 8, it is determined that the evaporation of the drain water is insufficient, and the drain water is generated. The frequency F 6 of the inverter 6i of the compressor 6 (the rotational speed of the compressor 6) is set to a value reduced by a predetermined value α (S5). That is, if the rotation speed of the compressor 6 is reduced, the evaporation temperature rises and icing in the evaporator 5 can be suppressed.

この状態でインバータ7biの出力周波数F(兼用ファン7bの回転数)を通常よりも強制的に所定値βだけ上げた値をセットする(S6)。この状態では、蒸発用ヒータ8bには通電を行わず、兼用ファン7bの回転数アップによりドレン水の蒸発を促進する。 In this state, a value obtained by forcibly increasing the output frequency F b of the inverter 7bi (the rotational speed of the dual purpose fan 7b) by a predetermined value β from the normal value is set (S6). In this state, the evaporation heater 8b is not energized, and the evaporation of the drain water is promoted by increasing the rotation speed of the dual purpose fan 7b.

続いて、インバータ6iの周波数Fの低下及びインバータ7biの出力周波数Fの上昇を開始からの時間が計測されているか否か、すなわち計時タイマTの動作中を判断する(S7)。 Then, whether the time from the start of the reduction and increase of the output frequency F b of the inverter 7bi frequency F 6 of the inverter 6i is measured, i.e. to determine the operating clock timer T (S7).

タイマTが動作中、経過時間の計測がなされていれば(Yes)、10分を経過しているか否かを判断する(S8)。経過時間計測がなされていなければ(No)、経過時間を(再)計時のため、タイマTをスタートし(S20)、ステップS11へ移行する。フロートスイッチ8cがON状態で継続して10分が経過していれば(Yes)、蒸発用ヒータ8bの通電率をアップし、蒸発の促進を図る。なお、初回の蒸発用ヒータ8bが非通電時は通電を開始する(S9)。なお、ステップS4でフロートスイッチ8cがOFF状態の時、ON状態からOFF状態に変化した場合、タイマTはリセットされ、計時が停止される(S21)。   If the elapsed time has been measured while the timer T is operating (Yes), it is determined whether or not 10 minutes have passed (S8). If the elapsed time has not been measured (No), the timer T is started to measure the elapsed time (re) (S20), and the process proceeds to step S11. If 10 minutes have elapsed since the float switch 8c is on (Yes), the energization rate of the evaporation heater 8b is increased to promote evaporation. When the first evaporation heater 8b is not energized, energization is started (S9). When the float switch 8c is in the OFF state in step S4, if the ON state changes to the OFF state, the timer T is reset and the time measurement is stopped (S21).

S9の後、タイマTを停止して、一旦計測を止める(S10)。続いて、フロートスイッチ11bがONか否かを判断する(S11)。フロートスイッチ11bがOFF(No)の場合には、オーバフロー用受皿11が所定水位に達していないことを意味するので、ステップS13に移行する。   After S9, the timer T is stopped and measurement is temporarily stopped (S10). Subsequently, it is determined whether or not the float switch 11b is ON (S11). If the float switch 11b is OFF (No), it means that the overflow tray 11 has not reached the predetermined water level, and the process proceeds to step S13.

フロートスイッチ11bがON(Yes)、すなわち、周囲条件が過酷で蒸発皿8の蒸発能力が不足して、オーバフローし、常開のフロートスイッチ11bがオーバフロー用受皿11の所定の水位を検知した状態では、インバータ7biの出力周波数Fbを最大にして、兼用ファン7bの回転数を最大にするとともに、警報ブザー8e、満水ランプ8fをONにする(S12)。 In the state where the float switch 11b is ON (Yes), that is, the ambient condition is severe and the evaporation capacity of the evaporating dish 8 is insufficient and overflows, and the normally open float switch 11b detects the predetermined water level of the overflow tray 11 Then, the output frequency F 6 b of the inverter 7bi is maximized, the rotation speed of the dual purpose fan 7b is maximized, and the alarm buzzer 8e and the full water lamp 8f are turned on (S12).

これにより、蒸発器5でのドレン水の蒸発量を最大にするとともに、使用者にオーバフロー用受皿11が所定の水位に達していることを知らせる。   Thus, the evaporation amount of drain water in the evaporator 5 is maximized, and the user is notified that the overflow tray 11 has reached a predetermined water level.

インバータ6iの周波数F、インバータ7biの出力周波数F、インバータ7aiの出力周波数Fをセットした値で動作させる(S13)。すなわち、フロートスイッチ8cがONしていれば、S5、S6でセットされた値に、フロートスイッチ8cがONしていなければ、S2、S3で決定された値に、さらに、フロートスイッチ11bが動作していれば、S12でセットされた値に周波数F周波数数F、周波数Fを制御する。 The inverter 6i is operated with a set value of the frequency F 6 of the inverter 6i, the output frequency F b of the inverter 7bi, and the output frequency F a of the inverter 7ai (S13). That is, if the float switch 8c is ON, the float switch 11b operates to the value set in S5 and S6, and if the float switch 8c is not ON, the value determined in S2 and S3. long as, the frequency F 6 frequency number F b to the value set in S12, controls the frequency F a.

S1において、ショーケース1の運転が停止状態では、インバータ6iの周波数F、インバータ7biの出力周波数F、インバータ7aiの出力周波数Fはいずれも0にセットされる(S14)。続いて、蒸発皿8のフロートスイッチ8cがONか否かを判断する(S15)。フロートスイッチ8cがON(Yes)、すなわち、常開のフロートスイッチ8cが蒸発皿8の所定の水位を検知した状態であり、この場合には、兼用ファン7bが、停止中であっても、強制的に回転させるよう、S6以降の制御が行われる。 In S1, when the operation of the showcase 1 is stopped, the frequency F 6 of the inverter 6i, the output frequency F b of the inverter 7bi, and the output frequency F a of the inverter 7ai are all set to 0 (S14). Subsequently, it is determined whether or not the float switch 8c of the evaporating dish 8 is ON (S15). The float switch 8c is ON (Yes), that is, the normally open float switch 8c has detected a predetermined water level in the evaporating dish 8. In this case, even if the dual-purpose fan 7b is stopped S6 and subsequent controls are performed so as to rotate the motor.

フロートスイッチ8cがOFF(No)、すなわち、蒸発皿8の所定の水位は所定水位に達していず、全ての構成要素は停止し、全停止状態になる(S16)。   The float switch 8c is OFF (No), that is, the predetermined water level of the evaporating dish 8 has not reached the predetermined water level, all the components are stopped, and all the stopped states are entered (S16).

S4において、蒸発皿8のフロートスイッチ8cがOFF(No)の場合には、蒸発皿8が所定水位に達していない。この場合は、順調にドレン水が蒸発皿8で蒸発されていることを意味し、それ以前にタイマTが動作していた場合でもタイマTを停止し、リセットした後、S11以降の制御を行う。   In S4, when the float switch 8c of the evaporating dish 8 is OFF (No), the evaporating dish 8 has not reached the predetermined water level. In this case, it means that drain water is smoothly evaporated in the evaporating dish 8, and even if the timer T has been operating before that, the timer T is stopped and reset, and then the control after S11 is performed. .

S12において、警報ブザー8e、満水ランプ8fがONになり、警告が発せられると、使用者は機械室カバー4aを外し、点検を行う。蒸発皿8とオーバフロー用受皿11を機械室4内に設け、受皿11を機械室カバー4aを開けることにより取り出しができるように配し、蒸発皿8を凝縮器7の後方にして、凝縮器7を横方向に延ばし、さらに庫内排水口9aを手前に設け後方の蒸発皿8まで導水樋10を設けているので、オーバフロー用受皿11の取り外しが容易に行え、かつ庫内排水口9aを手前側に設けているため、ショーケース前側からこの排水口9aの目詰まり等も点検できるとともに、機械室のスペース効率が向上している。   In S12, when the alarm buzzer 8e and the full water lamp 8f are turned on and a warning is issued, the user removes the machine room cover 4a and performs an inspection. An evaporating tray 8 and an overflow receiving tray 11 are provided in the machine chamber 4 and arranged so that the receiving tray 11 can be taken out by opening the machine chamber cover 4a. Is further extended in the horizontal direction, and the drainage port 9a is provided in front, and the water conduit 10 is provided up to the rear evaporating dish 8, so that the overflow tray 11 can be easily removed and the internal drainage port 9a is provided in front. Therefore, the drainage port 9a can be checked for clogging from the front side of the showcase and the space efficiency of the machine room is improved.

上記のように本実施形態のショーケースによれば、蒸発皿の水位を検知センサで検知してドレン水を蒸発させるため第1段階とし、兼用凝縮器用ファンを通常回転以上に強制的に回転数を上げ、ドレン水の蒸発の促進を図り、第2段階として、所定時間経過後に蒸発用ヒータに通電して蒸発を促進させるようにしたので、省エネルギー化が図れる。また、機械室カバーを開けることによりオーバフロー用受皿の保守点検が容易に行え、さらに、機械室にスペース効率の向上が図れる。   As described above, according to the showcase of the present embodiment, the water level of the evaporating dish is detected by the detection sensor and is set to the first stage in order to evaporate the drain water, and the combined condenser fan is forced to rotate more than normal rotation. As a second stage, the evaporation heater is energized after a predetermined time has passed to promote evaporation, so that energy saving can be achieved. In addition, by opening the machine room cover, maintenance and inspection of the overflow tray can be easily performed, and space efficiency can be improved in the machine room.

本発明に係わるショーケースの斜視図。The perspective view of the showcase concerning this invention. 本発明に係わるショーケースに組み込まれた冷凍サイクルの概念図。The conceptual diagram of the refrigerating cycle integrated in the showcase concerning this invention. 本発明に係わるショーケースの機械室の図5A−A線矢視の縦断面図。The longitudinal cross-sectional view of FIG. 5A-A arrow of the machine room of the showcase concerning this invention. 本発明に係わるショーケースの機械室の平面図。The top view of the machine room of the showcase concerning this invention. 本発明に係わるショーケースの機械室の正面視の縦断面図。The longitudinal cross-sectional view of the front view of the machine room of the showcase concerning this invention. 本発明に係わるショーケースに用いられる制御回路図。The control circuit diagram used for the showcase concerning this invention. 本発明に係わるショーケースの制御フローチャート。4 is a control flowchart of the showcase according to the present invention.

符号の説明Explanation of symbols

1…ショーケース、2…貯蔵室、2a…棚板、3…冷凍サイクル、4…機械室、4a…機械室カバー、5…蒸発器、5a…蒸発器用ファンモータ、6…圧縮機、7…凝縮器、7a…凝縮器用ファンモータ、7b…兼用ファンモータ、8…蒸発皿、8c…フロートスイッチ、11…オーバフロー用受皿、11b…フロートスイッチ、13…制御回路、13a…制御部。   DESCRIPTION OF SYMBOLS 1 ... Showcase, 2 ... Storage room, 2a ... Shelf board, 3 ... Refrigeration cycle, 4 ... Machine room, 4a ... Machine room cover, 5 ... Evaporator, 5a ... Evaporator fan motor, 6 ... Compressor, 7 ... Condenser, 7a ... Condenser fan motor, 7b ... Dual fan motor, 8 ... Evaporating tray, 8c ... Float switch, 11 ... Overflow pan, 11b ... Float switch, 13 ... Control circuit, 13a ... Control unit.

Claims (1)

冷媒を圧縮する圧縮機、ドレン水蒸発用を兼ねる凝縮器用ファンの回転により通風され冷媒を凝縮する凝縮器、貯蔵室内を冷却する蒸発器を有する冷凍サイクルを具備したショーケースにおいて、ドレン水蒸発用の蒸発皿と、前記蒸発皿のドレン水を蒸発させる蒸発用ヒータと、前記蒸発皿の水位を検知する検知センサを設け、この検知センサで検知した水位情報に基づき、所定時間前記蒸発用ヒータには通電せず、前記凝縮器用ファンを高速回転して前記蒸発皿に送風し、ドレン水の蒸発促進を行い、所定時間経過後蒸発用ヒータに通電するように制御することを特徴とするショーケース。 In a showcase having a refrigeration cycle having a compressor that compresses the refrigerant, a condenser that is ventilated by rotation of a condenser fan that also serves to evaporate the drain water, and that condenses the refrigerant, and an evaporator that cools the storage chamber. An evaporating dish, an evaporating heater for evaporating the drain water of the evaporating dish, and a detection sensor for detecting the water level of the evaporating dish, and based on the water level information detected by the detecting sensor, Is not energized, and the condenser fan is rotated at a high speed and blown to the evaporating dish to accelerate the evaporation of drain water, and the showcase is controlled to energize the evaporating heater after a predetermined time. .
JP2003334084A 2003-09-25 2003-09-25 Showcase Expired - Fee Related JP4246585B2 (en)

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CN108286867A (en) * 2017-12-29 2018-07-17 青岛海尔股份有限公司 Improve the control method and refrigerator of refrigerator evaporability
CN109282563A (en) * 2018-09-06 2019-01-29 海信容声(广东)冷柜有限公司 The refrigeration equipment that condensate water circulatory utilizes
CN109282563B (en) * 2018-09-06 2021-06-04 海信容声(广东)冷柜有限公司 Refrigeration equipment with condensate water recycling function

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