JPH0656659U - Refrigeration system using rotary compressor - Google Patents
Refrigeration system using rotary compressorInfo
- Publication number
- JPH0656659U JPH0656659U JP509291U JP509291U JPH0656659U JP H0656659 U JPH0656659 U JP H0656659U JP 509291 U JP509291 U JP 509291U JP 509291 U JP509291 U JP 509291U JP H0656659 U JPH0656659 U JP H0656659U
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- Prior art keywords
- compressor
- valve
- valve device
- pressure
- condenser
- Prior art date
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Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000008014 freezing Effects 0.000 abstract description 2
- 238000007710 freezing Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 24
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
(57)【要約】
【目的】冷凍運転初期の冷却能力を向上させ、エネルギ
効率の改善を計ると共に、リキッドハンマーと呼ばれる
現象がロータリー形圧縮機で起きないようにする。
【構成】ロータリー形圧縮機１、凝縮器３等を含む冷凍
回路に接続されたホットガスバイパス回路１２に、通電
時に開く第１弁装置１０ｃを設ける。一方、冷凍回路に
は、圧縮機１の高圧側及び凝縮器３の吸込側の間に、通
電の遮断時に閉じる第２弁装置１０ａ、１０ｂを設ける
と共に、圧縮機１のガス温度又は圧力を検出する検出部
８を弁装置とは別体に設ける。該第１、第２弁装置は、
検出部８が設定値以下のガス温度又は圧力を検出した時
に閉じて第１弁装置１０ｃに通電すると共に第２弁装置
１０ａ、１０ｂへの通電を遮断するスイッチ９に接続さ
れる。
(57) [Summary] [Purpose] To improve the cooling capacity in the initial stage of freezing operation, improve energy efficiency, and prevent the phenomenon called liquid hammer from occurring in the rotary compressor. A hot gas bypass circuit 12 connected to a refrigeration circuit including a rotary compressor 1, a condenser 3 and the like is provided with a first valve device 10c which opens when energized. On the other hand, the refrigeration circuit is provided with second valve devices 10a and 10b, which are closed when power is cut off, between the high pressure side of the compressor 1 and the suction side of the condenser 3, and detects the gas temperature or pressure of the compressor 1. The detection unit 8 is provided separately from the valve device. The first and second valve devices are
When the detection unit 8 detects a gas temperature or pressure lower than a set value, the detection unit 8 is connected to a switch 9 which is closed to energize the first valve device 10c and shut off energization to the second valve devices 10a and 10b.
Description
【０００１】[0001]
本考案は、ロータリー形圧縮機を用いた冷凍装置に関し、特にロータリー形圧 縮機の冷凍能率を向上させるための新規な改良に関するものである。 The present invention relates to a refrigerating apparatus using a rotary compressor, and more particularly to a new improvement for improving the refrigerating efficiency of a rotary compressor.
【０００２】[0002]
従来の冷蔵庫、製氷機等の冷凍機もしくは冷凍装置においては、レシプロ型圧 縮機が使用されているが、最近、省スペースの関係上、ロータリー形圧縮機を用 いるものが提案され始めている。 Reciprocating compressors are used in conventional refrigerators or refrigerating devices such as refrigerators and ice makers, but recently, in order to save space, proposals using rotary compressors have begun.
【０００３】[0003]
一般に、ロータリー形圧縮機はシェル内部が高圧側となる構造であるため、冷 凍機油（潤滑油）は高圧側にチャージされており、圧縮機を停止状態に放置して おくと、冷媒は圧縮機の油中に混合されて寝込み状態となることが一般的に知ら れている。このように、冷媒が油中に寝込んだ状態で圧縮機の作動を開始すると 、従来のレシプロ型のように圧縮機の油室が減圧されないため、冷媒が寝込んだ 状態のままの運転開始となり、冷凍サイクル中の冷媒が不足した状態となり（冷 媒チャージ量の少ない機械ほど影響が大である）、高圧圧力は容易に上昇しない 。その結果、低圧圧力も極度に低下すると共に真空運転現象を示すことにより冷 媒循環量は極めて少なくなる。 In general, a rotary compressor has a structure in which the inside of the shell is on the high-pressure side, so the refrigerator oil (lubrication oil) is charged on the high-pressure side, and if the compressor is left in a stopped state, the refrigerant will compress. It is generally known that they are mixed in the oil of the machine and fall asleep. In this way, if the operation of the compressor is started with the refrigerant sunk in the oil, the oil chamber of the compressor will not be depressurized unlike the conventional reciprocating type, and the operation will start with the refrigerant sunk. The refrigerant in the refrigeration cycle runs out of refrigerant (the smaller the amount of refrigerant charge, the greater the effect), and the high pressure does not rise easily. As a result, the low-pressure pressure is extremely reduced, and the vacuum operation phenomenon is exhibited, so that the cooling medium circulation amount becomes extremely small.
【０００４】 更に、圧縮機の高圧の上昇を遅くしている原因の一つに、圧縮機が常温状態で あると熱ボリュームも大きいため冷媒ガスを冷却すると共に、圧縮機のシェル内 が高圧側であることにより、シェル表面からの放熱も大となることがある。Further, one of the causes of slowing the rise of the high pressure of the compressor is that the refrigerant has a large heat volume when the compressor is in a room temperature state, so that the refrigerant gas is cooled and the inside of the shell of the compressor is on the high pressure side. Therefore, the heat radiation from the shell surface may be large.
【０００５】 前述の現象により、特に周囲温度が低いと、起動初期運転の冷却特性が悪く、 長時間の冷凍又は製氷運転となり、エネルギ損失も大きくなる。更に、前述の状 態で例えば製氷運転を行うと、蒸発器の入口側と出口側とで製氷部での氷形状が 大きく異なり、これは、低圧圧力が製氷開始時点から異常に低い圧力となり、蒸 発器入口側の温度（蒸発温度）が極めて低温となり、その反面、出口側の温度は それほど低下せず、蒸発器の入口、出口の温度バランスの悪い、スーパーヒート 状態となる。この結果、製氷部の入口側と出口側の氷の形状は大きく異なったも のとなり、製品歩留まりは極めて低くなっていた。Due to the above-mentioned phenomenon, particularly when the ambient temperature is low, the cooling characteristic in the initial startup operation is poor, the operation is frozen or ice-made for a long time, and the energy loss becomes large. Furthermore, for example, when ice-making operation is performed in the above-mentioned state, the ice shape at the ice-making part on the inlet side and the outlet side of the evaporator is greatly different, which means that the low pressure becomes an abnormally low pressure from the start of ice-making. The temperature on the inlet side of the evaporator (evaporation temperature) becomes extremely low, but on the other hand, the temperature on the outlet side does not decrease so much and the temperature balance at the inlet and outlet of the evaporator is poor, resulting in a superheated state. As a result, the shapes of ice on the inlet side and the outlet side of the ice making section differed greatly, and the product yield was extremely low.
【０００６】 以上の現象は、機械周囲（環境）温度が低いほど明白となるが、室温１０℃前 後の状態でも発生する時があり、この室温１０℃での発生は従来の除氷サイクル の完了検知手段として用いられていた除氷検知サーモスタットの検出温度（４℃ 〜８℃）を超えており、この点では従来の制御方式で除氷サイクルスタートを行 っても前記の問題点は解決できない。即ち、除氷サーモスタットの設定温度を高 くしておくと、通常運転時でも除氷時間が長くなり、時間損失となると共に、除 氷時の低圧圧力が異常に高くなることがあり、圧縮機の耐久性に問題が出てくる 。The above phenomenon becomes more obvious as the machine ambient (environment) temperature is lower, but it may occur even before and after room temperature of 10 ° C., and the occurrence at room temperature of 10 ° C. is the same as that of the conventional deicing cycle. The detected temperature (4 ° C to 8 ° C) of the deicing detection thermostat used as the completion detection means is exceeded. In this respect, the above problems are solved even if the deicing cycle is started by the conventional control method. Can not. That is, if the set temperature of the deicing thermostat is set high, the deicing time becomes long even during normal operation, time loss may occur, and the low-pressure pressure during deicing may become abnormally high. Durability will come up.
【０００７】 また、ロータリー形圧縮機は、レシプロ型圧縮機より軽量且つコンパクトであ るという長所を有しているが、ホットガスデフロスト（除氷）を行う製氷機にお いては、軽量であるが故に熱ボリュームが小さいという欠点がある。即ち、製氷 機の除氷サイクルでは、蒸発器にホットガスを流し氷を加熱して製氷室から氷を 離脱させるが、この除氷サイクルによって冷媒ガスは凝縮し、多量の液冷媒とし て圧縮機に吸入されるが、この液冷媒により圧縮機が冷却されることになる。こ の場合、従来のレシプロ型圧縮機より熱ボリュームの小さいロータリー形圧縮機 は早く冷却され、ホットガスパワーがレシプロ型のものに比較すると極めて弱い ものとなる。従って、低温時の除氷能力に多大の悪影響を与えることになる。Further, the rotary compressor has an advantage that it is lighter and more compact than the reciprocating compressor, but it is lighter in the ice making machine for performing hot gas defrosting. Therefore, there is a drawback that the heat volume is small. That is, in the deicing cycle of the ice making machine, hot gas is flown into the evaporator to heat the ice to separate the ice from the ice making chamber. The liquid refrigerant cools the compressor. In this case, the rotary compressor, which has a smaller heat volume than the conventional reciprocating compressor, cools faster and the hot gas power becomes extremely weak compared to the reciprocating compressor. Therefore, it has a great adverse effect on the deicing ability at low temperatures.
【０００８】[0008]
従って、本考案は、以上の欠点を速やかに除去するための極めて好適な手段を 提供するもので、特に、冷凍運転初期の冷却能力を向上させ、製氷機の場合には 、低温時の製氷初回に蒸発器の入口側と出口側とで氷形状が大きく異ならないよ うにし、初期製氷サイクルが異常に長くなることを防止してエネルギ効率を改善 することを目的としている。 Therefore, the present invention provides an extremely suitable means for promptly eliminating the above-mentioned drawbacks, and in particular, it improves the cooling capacity in the initial stage of freezing operation, and in the case of an ice making machine, the first ice making at a low temperature is performed. In addition, it is intended to prevent the ice shapes on the inlet side and the outlet side of the evaporator from being significantly different from each other and to prevent the initial ice making cycle from becoming abnormally long to improve energy efficiency.
【０００９】 この目的を達成するために、本考案は、ロータリー形圧縮機と、凝縮器と、キ ヤピラリーと、蒸発器とを直列環状に接続した冷凍回路を有すると共に、該冷凍 回路に、前記圧縮機のホットガスを前記圧縮機に帰還させるためのバイパス回路 を接続してなる冷凍装置において、前記バイパス回路には、通電された時に開く 第１弁装置が設けられ、前記冷凍回路には、前記圧縮機の高圧側及び前記凝縮器 の吸込側の間に、通電が遮断された時に閉じる第２弁装置が設けられると共に、 前記圧縮機のガス温度又は圧力を検出する検出部が前記第１、第２弁装置とは別 体に設けられており、該第１、第２弁装置は、前記検出部が設定値以下のガス温 度又は圧力を検出した時に閉じて前記第１弁装置に通電すると共に前記第２弁装 置への通電を遮断するスイッチに接続されていることを特徴とするものである。To achieve this object, the present invention has a refrigeration circuit in which a rotary compressor, a condenser, a capillary, and an evaporator are connected in series in an annular shape, and the refrigeration circuit is provided with the above-mentioned refrigeration circuit. In a refrigeration system in which a bypass circuit for returning hot gas of a compressor to the compressor is connected, the bypass circuit is provided with a first valve device that opens when energized, and the refrigeration circuit includes: A second valve device is provided between the high pressure side of the compressor and the suction side of the condenser, the second valve device being closed when the energization is cut off, and the detector for detecting the gas temperature or pressure of the compressor is the first. , The second valve device is provided separately from the first valve device, and the first and second valve devices are closed when the detection unit detects a gas temperature or pressure lower than a set value. The second valve device is energized and It is characterized in that it is connected to a switch that cuts off the energization to.
【００１０】[0010]
冷凍装置の運転状態において、圧縮機のガス温度又は圧力が設定値以下である ことを検出部が検出すると、スイッチが閉じて、同スイッチに接続された第１弁 装置に通電する。そのため、バイパス回路に設けられた該第１弁装置が開くので 、ホツトガスは圧縮機に帰還し、その昇温運転を行う。また、スイッチの閉成に より第２弁装置への通電が遮断されるため、該第２弁装置が閉じ、上述したホッ トガスが確実に帰還する。 When the detector detects that the gas temperature or pressure of the compressor is less than or equal to the set value in the operating state of the refrigeration system, the switch is closed and the first valve device connected to the switch is energized. Therefore, the first valve device provided in the bypass circuit opens, so that the hot gas returns to the compressor and the temperature raising operation is performed. Further, since the energization of the second valve device is shut off by closing the switch, the second valve device is closed and the above-mentioned hot gas is reliably returned.
【００１１】 この昇温運転により圧縮機のガス温度又は圧力が設定値以上に回復すれば、ス イッチが開き、第１弁装置に通電されなくなるため、該第１弁装置は完全に閉じ て、ホットガスは圧縮機に帰還せず、また、第２弁装置が開き、かくして冷却運 転が行われる。従って、冷凍装置に通電されない状態、即ち冷凍装置が停止した 状態においても、第１弁装置が完全に閉じている。When the gas temperature or pressure of the compressor is restored to the set value or higher by this temperature raising operation, the switch is opened and the first valve device is de-energized, so that the first valve device is completely closed. The hot gas does not return to the compressor, and the second valve device opens, thus performing cooling operation. Therefore, even when the refrigeration system is not energized, that is, the refrigeration system is stopped, the first valve device is completely closed.
【００１２】[0012]
【実施例】 次に、本考案の好適な実施例について添付図面を参照して詳細に説明するが、 図中、同一符号は同一又は対応部分を示すものとする。 図１は冷凍回路を示し、図２は制御回路部を示しており、符号１で示されるも のはその外面に断熱材１ａを有するロータリー形圧縮機（以下、単に圧縮機とい う）であり、この圧縮機１の出口管１ｂに接続された第１接続手段２は冷却ファ ン４を有する凝縮器３に接続され、この凝縮器３はキャピラリー５及び蒸発器６ を経て前記圧縮機１の入口管１ｃに第２接続手段７を介して接続されている。前 記出口管１ｂ近傍の高圧管である第１接続手段２に設けられた検出部８はスイッ チ９（サーモスタット、電子式温度スイッチ、又は圧力スイッチ等からなる）に 接続され、この検出部８により冷媒ガス温度又は冷媒ガス圧力が検出され、その 検出値に応じて前記スイッチ９が作動するようになっている。[Embodiments] Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding portions. FIG. 1 shows a refrigeration circuit, and FIG. 2 shows a control circuit section. What is denoted by reference numeral 1 is a rotary compressor (hereinafter, simply referred to as a compressor) having a heat insulating material 1a on its outer surface. The first connecting means 2 connected to the outlet pipe 1b of the compressor 1 is connected to a condenser 3 having a cooling fan 4, the condenser 3 passing through a capillary 5 and an evaporator 6 It is connected to the inlet pipe 1c through the second connecting means 7. The detection unit 8 provided in the first connection means 2 which is a high pressure pipe near the outlet pipe 1b is connected to a switch 9 (which is composed of a thermostat, an electronic temperature switch, a pressure switch, or the like), and this detection unit 8 is connected. Thus, the refrigerant gas temperature or the refrigerant gas pressure is detected, and the switch 9 is operated according to the detected value.
【００１３】 更に、第１接続手段２には、弁体としての三方弁１０の第１弁（第２弁装置） １０ａが接続され、第２弁（第２弁装置）１０ｂは前記凝縮器３に第３接続手段 １１を介して接続されると共に、前記三方弁１０の第３弁（第１弁装置）１０ｃ はホットガス管１２を介して前記キャピラリー５と蒸発管６とを接続する第４接 続手段１３に接続されている。ホットガス管１２は圧縮機１からのホットガスを 再び圧縮機１内に帰還させるためのバイパス回路を構成している。また、前述の 第１、第２、第３及び第４接続手段２、７、１１、１３は冷凍回路を構成してい る。Further, the first connecting means 2 is connected to a first valve (second valve device) 10a of a three-way valve 10 as a valve body, and a second valve (second valve device) 10b is connected to the condenser 3 The third valve (first valve device) 10c of the three-way valve 10 is connected to the capillary 5 and the evaporation pipe 6 via a hot gas pipe 12 It is connected to the connecting means 13. The hot gas pipe 12 constitutes a bypass circuit for returning the hot gas from the compressor 1 back into the compressor 1. The above-mentioned first, second, third and fourth connecting means 2, 7, 11, 13 constitute a refrigerating circuit.
【００１４】 前記スイッチ９は、図２で示される制御回路部１４内に設けられ、このスイッ チ９の第１接点９ａは、接点１５ａ及び１５ｂと製氷機制御回路１５とに接続さ れ、接点１５ａは前記三方弁１０に直列に接続されると共に、接点１５ｂは冷却 ファン４に直列に接続されている。スイッチ９の第２接点９ｂは前記三方弁１０ に直列に接続されており、前記圧縮機１は貯氷スイッチ１６を介して電源側に接 続されている。The switch 9 is provided in the control circuit section 14 shown in FIG. 2, and the first contact 9a of the switch 9 is connected to the contacts 15a and 15b and the ice making machine control circuit 15, 15a is connected to the three-way valve 10 in series, and the contact 15b is connected to the cooling fan 4 in series. The second contact 9b of the switch 9 is connected to the three-way valve 10 in series, and the compressor 1 is connected to the power source side via the ice storage switch 16.
【００１５】 次に、以上の構成を有する本考案による冷凍装置の動作について説明する。 図示しない貯氷庫内に設けられた貯氷スイッチ１６が貯氷庫内に一定の氷がな いことを検出すると、貯氷スイッチ１６がオンとなり、圧縮機１は運転を開始し 、貯氷スイッチ１６がオフとなるまで運転は継続される。この時、スイッチ９の 検出部８の温度又は圧力等が設定値（温度の場合、５０℃〜６０℃）以上であれ ば、第２接点９ｂは開放され、第１接点９ａがオンとなり、三方弁１０には接点 ９ｂを介して通電されないので、第３弁１０ｃが閉じ、第１弁１０ａ及び第２弁 １０ｂが開いており、通常の製氷サイクルが継続される。しかし、検出部８の温 度が設定値以下であれば、第２接点９ｂはオンとなっているため、三方弁１０は 通電され、第１弁１０ａと第３弁１０ｃとが開通して、バイパス回路であるホッ トガス管１２にホットガスが供給され、圧縮機１、三方弁１０、蒸発器６のバイ パス運転としてのホットガス運転が行われ、圧縮機１は、圧縮機のモータ（図示 せず）から発生する熱及び冷媒ガスの圧縮工程による発熱により加熱され、断熱 材１ａにより効果的にシェル温度を上昇させることができる。また、この際、前 記三方弁１０の第２弁１０ｂは、ホットガスサイクル運転時（バイパス運転時） には凝縮器３側へ冷媒が流入することがないよう閉弁されている。Next, the operation of the refrigerating apparatus according to the present invention having the above structure will be described. When the ice storage switch 16 provided in the ice storage (not shown) detects that there is no certain amount of ice in the ice storage, the ice storage switch 16 turns on, the compressor 1 starts operating, and the ice storage switch 16 turns off. Operation is continued until. At this time, if the temperature or pressure of the detecting portion 8 of the switch 9 is equal to or higher than the set value (in the case of temperature, 50 ° C to 60 ° C), the second contact 9b is opened and the first contact 9a is turned on, and the three-way Since the valve 10 is not energized via the contact 9b, the third valve 10c is closed, the first valve 10a and the second valve 10b are open, and the normal ice making cycle is continued. However, if the temperature of the detection unit 8 is equal to or lower than the set value, the second contact 9b is on, so that the three-way valve 10 is energized and the first valve 10a and the third valve 10c are opened, Hot gas is supplied to the hot gas pipe 12, which is a bypass circuit, and hot gas operation is performed as a bypass operation of the compressor 1, the three-way valve 10 and the evaporator 6. It is heated by the heat generated by the heat treatment and the heat generated by the compression process of the refrigerant gas, and the shell temperature can be effectively raised by the heat insulating material 1a. At this time, the second valve 10b of the three-way valve 10 is closed so that the refrigerant does not flow into the condenser 3 side during the hot gas cycle operation (during the bypass operation).
【００１６】 前述の構成は、述べるまでもないことであるが、冷凍装置の高圧側で最も放熱 量の大きい凝縮器３へ冷媒ガスが流入（凝縮器３の温度が冷媒の飽和圧力又は温 度より低い圧力又は温度であれば冷媒は凝縮器３で液化する）することを防止し 、凝縮器３内及び各接続管１１等内に残存する冷媒はキャピラリー５を経て蒸発 器６内の圧力まで低下し、冷媒量の殆どをホットガスサイクル運転（バイパス運 転）に使用することができる。Needless to say, the above-mentioned configuration is such that the refrigerant gas flows into the condenser 3 having the largest heat dissipation on the high pressure side of the refrigeration system (the temperature of the condenser 3 is the saturated pressure or temperature of the refrigerant). If the pressure or temperature is lower, the refrigerant is prevented from liquefying in the condenser 3, and the refrigerant remaining in the condenser 3 and in each connecting pipe 11 etc. reaches the pressure in the evaporator 6 through the capillary 5. As a result, most of the amount of refrigerant can be used for hot gas cycle operation (bypass operation).
【００１７】 次に、冷媒ガスの温度（圧力）が上昇し、検出部８の温度（圧力）が設定値以 上になると、スイッチ９の各接点９ａ、９ｂの通電状態は切り替わり、接点９ａ のみがオンとなって製氷サイクル運転が開始される。Next, when the temperature (pressure) of the refrigerant gas rises and the temperature (pressure) of the detection unit 8 exceeds a set value, the energization state of each contact 9a, 9b of the switch 9 switches, and only the contact 9a. Is turned on and the ice making cycle operation is started.
【００１８】 この製氷開始時点においては、冷媒の高圧圧力も正常値になっているため、製 氷機の場合には製氷第１サイクル目から氷形状の良好な氷を得ることができる。 また、ホットガスサイクル運転時（バイパス運転時）においても、凝縮器３側に 冷媒が残留しにくいため、圧縮機の熱ボリュームが小さいハンディキャップを十 分に補うことができ、通常サイクルの除氷不能、除氷時間のずれこみ、エネルギ の過消費、除氷時間のずれこみによる製氷した氷の過融解等の余計な現象を排除 することができる。At the start of ice making, the high pressure of the refrigerant is also at a normal value, so that in the case of an ice making machine, ice with a good ice shape can be obtained from the first ice making cycle. Also, during hot gas cycle operation (bypass operation), the refrigerant is unlikely to remain on the condenser 3 side, so the handicap with a small heat volume of the compressor can be sufficiently supplemented, and deicing in the normal cycle can be performed. It is possible to eliminate unnecessary phenomena such as failure of operation, deviation of deicing time, excessive consumption of energy, and excessive melting of ice making due to deviation of deicing time.
【００１９】 また、本考案を冷蔵庫に実施した場合、除霜サイクルの短縮化が計れ効率的な 除霜を行うことができる。 更に、図３は本考案による冷凍装置の他の実施例を示すもので、弁体を形成す る前記三方弁１０の第１弁部（第２弁装置）１０ｄ及び第２弁部（第１弁装置） １０ｅで構成し、第１弁部１０ｄは前記圧縮機１と凝縮器３との間に配設されて 、凝縮器３への冷媒供給のオン、オフを制御すると共に、第２弁部１０ｅは前記 圧縮機１と蒸発器６との間に配設されて蒸発器６及び圧縮機１自体への冷媒の供 給及び帰還のオン、オフを制御している。従って、ホットガスサイクル運転時（ バイパス運転時）には、第１弁部１０ｄを閉弁し、第２弁部１０ｅを開弁するこ とにより所要の動作が行われ、前記三方弁１０と同様の機能を備えていることが 分かる。When the present invention is applied to a refrigerator, the defrost cycle can be shortened and efficient defrosting can be performed. Further, FIG. 3 shows another embodiment of the refrigerating apparatus according to the present invention, in which the first valve portion (second valve device) 10d and the second valve portion (first valve portion) of the three-way valve 10 forming the valve body are formed. Valve device) 10e, the first valve portion 10d is disposed between the compressor 1 and the condenser 3 to control the on / off of the refrigerant supply to the condenser 3 and the second valve The section 10e is arranged between the compressor 1 and the evaporator 6 and controls the supply and return of the refrigerant to the evaporator 6 and the compressor 1 itself, and on / off of the return. Therefore, during the hot gas cycle operation (during the bypass operation), the required operation is performed by closing the first valve portion 10d and opening the second valve portion 10e, similar to the three-way valve 10. You can see that it has the function of.
【００２０】[0020]
本考案によるロータリー形圧縮機を用いた冷凍装置は、以上のような構成と作 用とを備えているため、圧縮機が常温状態であっても急速に圧縮機を加熱し、シ ェル温度を上昇させてから製氷運転に移行するため、高圧圧力が正常サイクルと 同等となり、製氷開始時点で極度に低圧圧力が低下せず、製氷機の場合には、蒸 発器の入口側と出口側とで氷形状が実質的に異なることがなく、実質的に同一形 状の商品価値の高い氷が得られ、歩留まりを十分に向上させることができる。製 氷初期サイクルから正常な製氷時間で製氷運転ができ、エネルギ効率が向上する 。また、いわゆるエアコン、カーエアコン等においては、立ち上がり時の除湿効 果、除霜効果及び冷却効果を急速に向上させることができる。 The refrigerating apparatus using the rotary compressor according to the present invention has the above-described configuration and operation, and therefore, even when the compressor is at room temperature, the compressor is heated rapidly and the shell temperature is reduced. Since the ice-making operation is started after the temperature rises, the high-pressure pressure becomes equal to that in the normal cycle, and the low-pressure pressure does not drop extremely at the start of ice-making. The ice shapes do not differ substantially between and, and ice with substantially the same shape and high commercial value can be obtained, and the yield can be sufficiently improved. The ice making operation can be performed in the normal ice making time from the initial ice making cycle, and the energy efficiency is improved. Further, in so-called air conditioners, car air conditioners, etc., the dehumidifying effect at the start-up, the defrosting effect, and the cooling effect can be rapidly improved.
【００２１】 更に、圧縮機停止時にその高圧側と低圧側とがバイパス回路を介して連通して いると、蒸発器に液冷媒が多量に溜まり寝込むため、圧縮機の起動時に多量の液 冷媒が戻り、リキッドハンマーと呼ばれている現象を起こして、圧縮機の寿命が 短くなるが、本考案明によれば、圧縮機のガス温度又は圧力の検出部をバイパス 回路にある弁装置と一体に設けるのではなく、冷凍回路に設けたので、圧縮機の 停止時に同弁装置は閉じており、上述した欠点は生じない。Furthermore, when the high-pressure side and the low-pressure side communicate with each other via a bypass circuit when the compressor is stopped, a large amount of liquid refrigerant accumulates in the evaporator and falls asleep. Returning to this, a phenomenon called a liquid hammer occurs, which shortens the life of the compressor.According to the present invention, the gas temperature or pressure detector of the compressor is integrated with the valve device in the bypass circuit. Since the valve device is provided in the refrigeration circuit instead of being provided, the valve device is closed when the compressor is stopped, and the above-mentioned drawback does not occur.
【図１】本考案に従ってロータリー形圧縮機を用いた冷
凍装置の実施例の冷凍回路を示す系統図。FIG. 1 is a system diagram showing a refrigeration circuit of an embodiment of a refrigeration apparatus using a rotary compressor according to the present invention.
【図２】図１の冷凍装置の制御回路図。FIG. 2 is a control circuit diagram of the refrigerating apparatus of FIG.
【図３】図１の冷凍装置の別の実施例を示す系統図。3 is a system diagram showing another embodiment of the refrigerating apparatus of FIG.
【符号の説明】 １ ロータリー形圧縮機 １ａ 断熱材 １ｂ 出口管 １ｃ 入口管 ２ 第１接続手段 ３ 凝縮器 ４ 冷却ファン ５ キャピラリー ６ 蒸発器 ７ 第２接続手段 ８ 検出部 ９ スイッチ １０ 三方弁（弁体） １０ａ 第１弁（第２弁装置） １０ｂ 第２弁（第２弁装置） １０ｃ 第３弁（第１弁装置） １０ｄ 第１弁部（第２弁装置） １０ｅ 第２弁部（第１弁装置） １１ 第２接続手段 １２ ホットガス管（バイパス回路） １３ 第３接続手段 １４ 制御回路部 １５ 製氷機制御回路 １６ 貯氷スイッチ[Explanation of Codes] 1 rotary compressor 1a heat insulating material 1b outlet pipe 1c inlet pipe 2 first connecting means 3 condenser 4 cooling fan 5 capillary 6 evaporator 7 second connecting means 8 detector 9 switch 10 three-way valve (valve) Body 10a 1st valve (2nd valve apparatus) 10b 2nd valve (2nd valve apparatus) 10c 3rd valve (1st valve apparatus) 10d 1st valve section (2nd valve apparatus) 10e 2nd valve section (1st) 1 valve device) 11 second connecting means 12 hot gas pipe (bypass circuit) 13 third connecting means 14 control circuit section 15 ice making machine control circuit 16 ice storage switch
Claims (1)
と、キヤピラリー(５)と、蒸発器(６)とを直列環状に接
続した冷凍回路を有すると共に、該冷凍回路に、前記圧
縮機のホットガスを前記圧縮機(１)に帰還させるための
バイパス回路(１２)を接続してなる冷凍装置において、
前記バイパス回路(１２)には、通電された時に開く第１
弁装置(１０ｃ；１０ｅ)が設けられ、前記冷凍回路に
は、前記圧縮機(１)の高圧側及び前記凝縮器(３)の吸込
側の間に、通電が遮断された時に閉じる第２弁装置(１
０ａ、１０ｂ；１０ｄ)が設けられると共に、前記圧縮
機(１)のガス温度又は圧力を検出する検出部(８)が前記
第１、第２弁装置とは別体に設けられており、該第１、
第２弁装置は、前記検出部(８)が設定値以下のガス温度
又は圧力を検出した時に閉じて前記第１弁装置(１０
ｃ；１０ｅ)に通電すると共に前記第２弁装置(１０ａ、
１０ｂ；１０ｄ)への通電を遮断するスイッチ(９)に接
続されていることを特徴とするロータリー形圧縮機を用
いた冷凍装置。1. A rotary compressor (1) and a condenser (3)
And a refrigeration circuit in which the capillary (5) and the evaporator (6) are connected in series in an annular shape, and a bypass for returning the hot gas of the compressor to the compressor (1) in the refrigeration circuit. In the refrigerating device formed by connecting the circuit (12),
The bypass circuit (12) has a first opening that opens when electricity is applied.
A second valve which is provided with a valve device (10c; 10e) and is closed in the refrigeration circuit between the high pressure side of the compressor (1) and the suction side of the condenser (3) when the energization is cut off. Device (1
0a, 10b; 10d) and a detector (8) for detecting the gas temperature or pressure of the compressor (1) is provided separately from the first and second valve devices. First,
The second valve device is closed when the detection unit (8) detects a gas temperature or pressure below a set value, and the first valve device (10) is closed.
c; 10e) is energized and the second valve device (10a, 10a,
Refrigerating apparatus using a rotary compressor, which is connected to a switch (9) for shutting off power to 10b; 10d).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP509291U JPH0656659U (en) | 1991-01-18 | 1991-01-18 | Refrigeration system using rotary compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP509291U JPH0656659U (en) | 1991-01-18 | 1991-01-18 | Refrigeration system using rotary compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0656659U true JPH0656659U (en) | 1994-08-05 |
Family
ID=11601752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP509291U Pending JPH0656659U (en) | 1991-01-18 | 1991-01-18 | Refrigeration system using rotary compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0656659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009174769A (en) * | 2008-01-24 | 2009-08-06 | Miura Co Ltd | Chiller |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5437946A (en) * | 1977-08-31 | 1979-03-20 | Mitsubishi Electric Corp | Refrigerator |
| JPS5958181A (en) * | 1982-09-25 | 1984-04-03 | Matsushita Electric Ind Co Ltd | Refrigerator |
-
1991
- 1991-01-18 JP JP509291U patent/JPH0656659U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5437946A (en) * | 1977-08-31 | 1979-03-20 | Mitsubishi Electric Corp | Refrigerator |
| JPS5958181A (en) * | 1982-09-25 | 1984-04-03 | Matsushita Electric Ind Co Ltd | Refrigerator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009174769A (en) * | 2008-01-24 | 2009-08-06 | Miura Co Ltd | Chiller |
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