JPH10220353A - Semi-closed type screw compressor - Google Patents
Semi-closed type screw compressorInfo
- Publication number
- JPH10220353A JPH10220353A JP9024746A JP2474697A JPH10220353A JP H10220353 A JPH10220353 A JP H10220353A JP 9024746 A JP9024746 A JP 9024746A JP 2474697 A JP2474697 A JP 2474697A JP H10220353 A JPH10220353 A JP H10220353A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- semi
- electric motor
- power supply
- casing
- 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.)
- Pending
Links
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 description 18
- 238000001816 cooling Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は半密閉形スクリュー
圧縮機に関する。The present invention relates to a semi-hermetic screw compressor.
【0002】[0002]
【従来の技術】従来の防水形冷凍機ユニットに搭載され
る圧縮機は、例えば実開昭54−78014号公報に記載され
ているような開放形の往復動式圧縮機または、例えば実
開昭54−67844 号公報に記載されているような開放形ス
クリュー圧縮機であった。これらの圧縮機の駆動方式に
は防水形の電動機をベルト掛または直結形として採用
し、防水構造の保護装置を具備したものであった。2. Description of the Related Art A compressor mounted on a conventional waterproof refrigerator unit is, for example, an open reciprocating compressor as described in Japanese Utility Model Application Laid-Open No. 54-78014, or a conventional reciprocating compressor. It was an open screw compressor as described in JP-A-54-67844. The drive system of these compressors employs a waterproof electric motor as a belt or a direct connection type, and is provided with a protection device having a waterproof structure.
【0003】ここで防水構造の定義は、日本工業規格JI
SF8001「船舶用電気機器の防水試験」すなわち、機体から
3mの距離から内径12.5mm 以上のノズルで水頭8m
の水圧でいろいろな方向から通算10分間注水しても機
体内部に水が浸入しない構造であることで、防水構造の
保護装置を具備した前述の圧縮機装置は、雨水や水滴の
かかる屋外設置の冷却設備や、高湿度環境のトンネル内
に設置される冷却設備の防水形冷凍機ユニットに搭載で
きる。[0003] Here, the definition of the waterproof structure is based on Japanese Industrial Standard JI.
SF8001 "Waterproof test for marine electrical equipment", that is, a water head of 8 m with a nozzle with an inner diameter of 12.5 mm or more from a distance of 3 m from the aircraft
The above-mentioned compressor unit equipped with a waterproof protection device has a structure that does not allow water to enter inside the body even if water is injected from various directions for 10 minutes in total from various directions. It can be mounted on a cooling system or a waterproof refrigerator unit of a cooling system installed in a tunnel in a high humidity environment.
【0004】また、例えば、特開平5−215073 号公報お
よび特開平7−167057 号公報記載の半密閉往復動形圧縮
機について、前者ではモータのステータと端子盤のター
ミナルとの間に接続されるリード線の結線手段、後者で
はモータのコイルエンドに対する冷却手段に関する記載
があるが、電動機用電源接続端子箱を裸充電部分および
絶縁充電部分が外部と隔離された水密構造にすることに
ついては全く開示されていなかった。Further, for example, in the semi-hermetic reciprocating compressor described in Japanese Patent Application Laid-Open Nos. 5-215073 and 7-167057, the former is connected between a stator of a motor and a terminal of a terminal board. There is a description about the means for connecting the lead wires, and in the latter, a means for cooling the coil end of the motor. Had not been.
【0005】さらに、圧縮機保護装置(圧力スイッチ,
温度スイッチ)の防水構造についても記載されていなか
った。Further, a compressor protection device (pressure switch,
The waterproof structure of the temperature switch) was not described.
【0006】すなわち、前記半密閉形圧縮機は防水形冷
凍機ユニットに搭載できないものである。That is, the semi-hermetic compressor cannot be mounted on a waterproof refrigerator unit.
【0007】[0007]
【発明が解決しようとする課題】従来技術の防水形冷凍
機ユニットに搭載する開放形の圧縮機は圧縮機の駆動方
式に防水形の電動機をベルト掛または直結形として採用
したもので、次のような課題があった。The open-type compressor mounted on the prior-art waterproof refrigerator unit employs a waterproof electric motor as a belt drive or a direct connection type for the drive system of the compressor. There was such a problem.
【0008】(1)圧縦機に軸封装置を装備しているた
め定期的なメンテナンスを必要とする。(1) Periodic maintenance is required because a shaft sealing device is provided in a press vertical machine.
【0009】(2)圧縮機構部と電動機部との芯出し作
業を必要とする。(2) Alignment work between the compression mechanism section and the electric motor section is required.
【0010】(3)振動が大きいため頑丈な基礎もしく
は防振装置を必要とする。(3) Since the vibration is large, a sturdy foundation or a vibration isolator is required.
【0011】(4)圧縮機構部と電動機部との組合せ状
態での据付面積が大きい。(4) The installation area in the combined state of the compression mechanism and the motor is large.
【0012】また、従来技術の半密閉形圧縮機では、電
動機用電源接続端子箱は、裸充電部分および絶縁充電部
分が外部と隔離された水密性を有する防水構造とするこ
とについては配慮されておらず、防水形冷凍機ユニット
に搭載できないものであった。Also, in the prior art semi-hermetic compressor, consideration is given to the fact that the power supply terminal box for the motor has a watertight waterproof structure in which the bare charging portion and the insulated charging portion are isolated from the outside. And could not be mounted on a waterproof refrigerator unit.
【0013】本発明は、上記従来技術の問題点を解決す
るためになされたもので、保守作業の手間を減らし、据
付面積が少なくてすむ信頼性の高い半密閉形圧縮機およ
びそれを搭載する防水形冷凍機ユニットを提供すること
を目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and a highly reliable semi-hermetic compressor which requires less maintenance work and requires a smaller installation area, and has the compressor mounted thereon. An object of the present invention is to provide a waterproof refrigerator unit.
【0014】[0014]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係る半密閉形スクリュー圧縮機の第一の構
成は、固定子および回転子を含んでなる電動機と互いに
噛み合って回転する雌雄一対のスクリューロータからな
る圧縮機構部とを直結して、分解可能なケーシング内に
収納し、該ケーシングに前記固定子の導線を接続した気
密性を有する端子構造に電動機用電源接続端子箱を装着
し、前記圧縮機構部の吐出側に油分離手段を内蔵した油
回収器を前記ケーシングに気密性のあるフランジを介し
て接合した半密閉形スクリュー圧縮機において、前記電
動機用電源接続端子箱は、裸充電部分および絶縁充電部
分が外部と隔離された水密性を有する防水構造としたも
のである。In order to achieve the above object, a first configuration of a semi-hermetic screw compressor according to the present invention is configured to rotate while meshing with an electric motor including a stator and a rotor. A power supply connection terminal box for an electric motor is connected directly to a compression mechanism section comprising a pair of male and female screw rotors, housed in a disassemblable casing, and having a hermetic terminal structure in which a conductor of the stator is connected to the casing. In a semi-hermetic screw compressor in which an oil recovery unit having an oil separation unit built in on the discharge side of the compression mechanism unit is attached to the casing via an airtight flange, the power connection terminal box for an electric motor is The naked charging portion and the insulated charging portion have a watertight waterproof structure that is isolated from the outside.
【0015】また、上記目的を達成するために、本発明
に係る半密閉形スクリュー圧縮機の第二の構成は、固定
子および回転子を含んでなる電動機と互いに噛み合って
回転する雌雄一対の低段側スクリューロータと高段側ス
クリューロータからなる圧縮機構部とを直結して分解可
能なケーシング内に収納し、該ケーシングに前記固定子
の導線を接続した気密性を有する端子構造に、電動機用
電源接続端子箱を装着した半密閉形スクリュー圧縮機に
おいて、前記電動機用電源接続端子箱は裸充電部分およ
び絶縁充電部分が外部と隔離された水密性を有する防水
構造としたものである。Further, in order to achieve the above object, a second configuration of the semi-hermetic screw compressor according to the present invention comprises a male and female low-powered pair of male and female rotating together with an electric motor including a stator and a rotor. A stage-side screw rotor and a compression mechanism section composed of a high-stage side screw rotor are directly connected to each other and housed in a disassemblable casing, and the casing is connected to the conductor of the stator. In a semi-hermetic screw compressor equipped with a power connection terminal box, the power connection terminal box for the motor has a watertight waterproof structure in which a bare charging portion and an insulated charging portion are isolated from the outside.
【0016】また、上記目的を達成するために、本発明
に係る半密閉形往復動式圧縮機の構成は、固定子および
回転子を含んでなる電動機とこの電動機に直結され、該
電動機に駆動されて回転するクランクシャフト及びこの
クランクシャフトにコネクチングロッドを介して結合さ
れたピストンを内装するシリンダとを含んでなる圧縮要
素とを分解可能な密閉ケーシングに内蔵し、該ケーシン
グに電動機用電源接続端子箱を装着してなる半密閉形往
復動式圧縮機において、前記電動機用電源接続端子箱は
裸充電部分および絶縁充電部分が外部と隔離された水密
性を有する防水構造としたものである。Further, in order to achieve the above object, a semi-hermetic reciprocating compressor according to the present invention has a configuration in which a motor including a stator and a rotor and a motor directly connected to the motor and driven by the motor. A compression element comprising a rotating crankshaft and a cylinder containing a piston coupled to the crankshaft via a connecting rod is housed in a decomposable hermetic casing, and the casing has a power supply connection terminal for an electric motor. In a semi-hermetic reciprocating compressor equipped with a box, the power supply terminal box for a motor has a watertight waterproof structure in which a bare charging portion and an insulated charging portion are isolated from the outside.
【0017】さらに、上記目的を達成するために、本発
明に係る半密閉形圧縮機の構成は、前記の圧縮機の吐出
圧力が異常に上昇したとき、あるいは、圧縮機の吸入圧
が異常に低下したときに該圧縮機の運転を停止する圧力
スイッチと圧縮機の吐出ガス温度が異常に上昇したとき
に該圧縮機の運転を停止する温度スイッチとを備え、こ
れら圧力スイッチ及び温度スイッチを防水構造としたも
のである。Further, in order to achieve the above object, the structure of the semi-hermetic compressor according to the present invention is provided when the discharge pressure of the compressor is abnormally increased or when the suction pressure of the compressor is abnormally increased. A pressure switch for stopping the operation of the compressor when the temperature decreases, and a temperature switch for stopping the operation of the compressor when the discharge gas temperature of the compressor rises abnormally. It is a structure.
【0018】また、上記目的を達成するために、本発明
では、冷媒ガスを圧縮する圧縮機と圧縮されて高温,高
圧になった冷媒ガスを冷却,凝縮して液冷媒を生成させ
る凝縮器と、この液冷媒を蒸発させ、被冷却物から蒸発
熱を奪って冷却する蒸発器とを備えて冷凍サイクルを構
成する防水形冷凍機ユニットに前述の半密閉形圧縮機を
搭載するものである。In order to achieve the above object, the present invention provides a compressor for compressing a refrigerant gas and a condenser for cooling and condensing the compressed, high-temperature, high-pressure refrigerant gas to generate a liquid refrigerant. The above-mentioned semi-hermetic compressor is mounted on a waterproof refrigerator unit that constitutes a refrigeration cycle and includes an evaporator that evaporates the liquid refrigerant and removes heat of evaporation from an object to be cooled to cool the object.
【0019】[0019]
【発明の実施の形態】本発明の実施の形態を図1ないし
図4を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.
【0020】ここで説明する冷凍装置に係る冷凍機ユニ
ットは冷媒ガスを圧縮する半密閉形スクリュー圧縦機と
圧縮されて高温,高圧になった冷媒ガスを冷却,凝縮し
て液冷媒を生成させる凝縮器と、この液冷媒を内装した
蒸発コイルで周囲の被冷却物から蒸発熱を奪って冷却す
る蒸発器とを備えて冷却サイクルを構成し、さらに半密
閉形スクリュー圧縮機に付属して具備された圧力スイッ
チ,温度スイッチなど保護装置とを含んで構成されてい
る。The refrigerating unit according to the refrigerating apparatus described herein is a semi-enclosed screw pressure vertical machine for compressing the refrigerant gas, and cools and condenses the compressed high-temperature and high-pressure refrigerant gas to generate a liquid refrigerant. A cooling cycle is provided with a condenser and an evaporator that removes the heat of evaporation from surrounding objects to be cooled with an evaporating coil containing the liquid refrigerant and forms a cooling cycle, and is further provided with a semi-hermetic screw compressor. And a protection device such as a pressure switch and a temperature switch.
【0021】まず、図1を参照して半密閉形スクリュー
圧縮機の構成部品と冷媒の流れについて説明する。First, the components of the semi-hermetic screw compressor and the flow of the refrigerant will be described with reference to FIG.
【0022】図1は本発明の一実施形態に係る半密閉形
スクリュー圧縮機の構成を示す略示構成図である。FIG. 1 is a schematic diagram showing the configuration of a semi-hermetic screw compressor according to one embodiment of the present invention.
【0023】図1において、1は互いに噛み合って回転
する雌雄一対のスクリューロータ2からなる圧縮機構
部、3はスクリューロータ2と一体のロータ軸、4はロ
ータ軸3に嵌着された回転子、5はケーシング7側に固
定された固定子でこれら回転子4,固定子5で電動機を
構成している。6A,6Bはロータ軸3を支持する軸
受、7は軸受6A,6Bおよび固定子5をその内面に支
持するケーシング、8Aはケーシングの電動機側を覆う
カバー、8Bはケーシング7の圧縮機構部側を覆うカバ
ー、9は電動機用電源接続端子箱、10は油回収器、1
6は油回収器内に設けられた油分離装置である。12は
固定子5の巻線端部、13は巻線端部12の導線、14
は端子ボルトを示す。また、15はカバー8Aに設けら
れた吸入口、17は油回収器10に設けた吐出口であ
る。In FIG. 1, reference numeral 1 denotes a compression mechanism comprising a pair of male and female screw rotors 2 meshing and rotating with each other; 3, a rotor shaft integrated with the screw rotor 2; 4, a rotor fitted to the rotor shaft 3; Reference numeral 5 denotes a stator fixed to the casing 7 side, and the rotor 4 and the stator 5 constitute an electric motor. 6A and 6B are bearings that support the rotor shaft 3, 7 is a casing that supports the bearings 6A and 6B and the stator 5 on its inner surface, 8A is a cover that covers the motor side of the casing, and 8B is a compression mechanism side of the casing 7. Cover 9; power supply terminal box 9 for electric motor;
6 is an oil separation device provided in the oil recovery device. 12 is a winding end of the stator 5, 13 is a conductor of the winding end 12, 14
Indicates a terminal bolt. Reference numeral 15 denotes a suction port provided in the cover 8A, and reference numeral 17 denotes a discharge port provided in the oil recovery device 10.
【0024】図1に示す半密閉形スクリュー圧縮機は固
定子5および回転子4からなる電動機と、互いに噛み合
って回転する雌雄一対のスクリューロータ2からなる圧
縮機構部1とを直結してケーシング7内に収納したもの
である。そしてケーシング7に電動機用電源接続端子箱
9を装着し、圧縮機構部1の吐出側に油分離手段16を
内蔵した油回収器10をケーシング7に接合している。
ケーシング7とカバー8A,8B,電動機用電源接続端
子箱9および油回収器10とは互いにボルト11で結合
されて密閉容器を形成するもので、分解可能になってお
り、半密閉形構造である。固定子5の巻線端部12の導
線13は電動機用電源接続端子箱9の端子ボルト14の
ケーシング側端部に接続されている。The semi-hermetic screw compressor shown in FIG. 1 has a casing 7 which is directly connected to an electric motor consisting of a stator 5 and a rotor 4 and a compression mechanism 1 consisting of a pair of male and female screw rotors 2 which mesh with each other and rotate. It is stored inside. An electric motor power supply connection terminal box 9 is mounted on the casing 7, and an oil recovery unit 10 having an oil separating unit 16 built in on the discharge side of the compression mechanism 1 is joined to the casing 7.
The casing 7, the covers 8A and 8B, the power supply terminal box 9 for the electric motor, and the oil recovery unit 10 are connected to each other with bolts 11 to form a closed container, which can be disassembled, and has a semi-closed structure. . The conductor 13 of the winding end 12 of the stator 5 is connected to the casing side end of the terminal bolt 14 of the electric power supply connection terminal box 9.
【0025】冷媒ガスはカバー8Aに形成された吸入口
15から吸入されて、回転子4,固定子5の周囲を通過
してスクリューロータ2により圧縮され、油回収器10
に内蔵された油分離装置16を通過して油回収器10に
形成された吐出口17から吐出管(図示せず)を経て、
凝縮器(図示せず)へ吐出される。The refrigerant gas is sucked through a suction port 15 formed in the cover 8A, passes around the rotor 4 and the stator 5 and is compressed by the screw rotor 2, and
Through an oil separation device 16 built in the oil recovery device 10 and a discharge pipe 17 (not shown) from a discharge port 17 formed in the oil recovery device 10.
It is discharged to a condenser (not shown).
【0026】次に図2,図3を参照して電動機用電源接
続端子箱9について説明する。図2は図1の半密閉形ス
クリュー圧縮機に具備された電動機用電源接続端子箱の
構成を示す平面図、図3は図2の側面断面図である。Next, the motor power supply connection terminal box 9 will be described with reference to FIGS. 2 is a plan view showing the configuration of a power supply terminal box for a motor provided in the semi-hermetic screw compressor of FIG. 1, and FIG. 3 is a side sectional view of FIG.
【0027】電動機用電源接続端子箱9は底板18と底
仮18に直角をなして一方の辺が底板18に溶接された
枠板19A,19Bとこれら枠体19A,19Bの底板
18に溶接された辺と反対側の辺に溶接されたフランジ
20とで構成されている。The power supply connection terminal box 9 for a motor is formed at right angles to the bottom plate 18 and the bottom temporary 18 and has one side welded to the bottom plates 18 and 19B, and the bottom plates 18 of these frames 19A, 19B. And a flange 20 welded to the opposite side.
【0028】蓋21はフランジ20に耐水性シートパッ
キン22を介してボルト23で締結され、電動機用電源
接続端子箱9は水密性を有する防水構造である。The lid 21 is fastened to the flange 20 with bolts 23 via a water-resistant sheet packing 22, and the motor power supply connection terminal box 9 has a watertight waterproof structure.
【0029】ケーシング7にはケーシング7から突出す
る形で台形状の端子台24が形成されており、この端子
台24に端子箱9の底板18が冷凍機用シートパッキン
25を介してボルト26で締結されている。また、端子
台24を貫通して複数本の端子ボルト14が、一端は電
動機用電源接続端子箱9内に、他端は端子台24内、つ
まりケーシング7内(圧縮機内部側)に位置し、絶縁機
27およびゴムシート28を介して、取付けられてい
る。ゴムシート28は電動機用電源接続端子箱9とケー
シング7内との気密を保持している。A trapezoidal terminal block 24 is formed on the casing 7 so as to protrude from the casing 7, and the bottom plate 18 of the terminal box 9 is connected to the terminal block 24 via bolts 26 via a sheet packing 25 for a refrigerator. Has been concluded. A plurality of terminal bolts 14 penetrate the terminal block 24, one end of which is located in the power supply connection terminal box 9 for the electric motor and the other end is located in the terminal block 24, that is, in the casing 7 (inside the compressor). , Via an insulator 27 and a rubber sheet 28. The rubber sheet 28 maintains the airtightness between the power supply connection terminal box 9 for the electric motor and the inside of the casing 7.
【0030】枠板19Aには防水ねじ込保護管継手29
を接続するための接続口30が開口している。防水ねじ
込保護管継手29は、この接続口30に取付けられてお
り、電源接続導線31は防水ねじ込保護管継手29の中
を通って外部から電動機用電源接続端子箱9内に導かれ
る。このように電源接続導線31は防水ねじ込保護管継
手29を通して配設され、端子ボルト14によって電動
機用電源接続端子箱9の内部側端に結線される。図1に
示した固定子5の導線13は端子ボルト14の圧縮機内
部側に結線される。A waterproof screw-in protective pipe joint 29 is provided on the frame plate 19A.
Is open. The waterproof screw-in protection pipe joint 29 is attached to the connection port 30, and the power supply connection wire 31 is guided from the outside into the motor power supply connection terminal box 9 through the waterproof screw-in protection pipe joint 29. As described above, the power supply connecting wire 31 is provided through the waterproof screw-in protection pipe joint 29 and is connected to the inner side end of the motor power supply connecting terminal box 9 by the terminal bolt 14. The conductor 13 of the stator 5 shown in FIG. 1 is connected to the terminal bolt 14 inside the compressor.
【0031】図2,図3に示す電動機用電源接続端子箱
9は、鋼板を溶接構造で成形し、蓋21とフランジ20
との接合面に耐水性シートパッキン22を、底面18と
端子台24との接合面には冷凍機用シートパッキン25
をそれぞれ介在させボルトで締結している。The power supply connection terminal box 9 for the motor shown in FIGS. 2 and 3 is made of a steel plate formed by welding, and a lid 21 and a flange 20 are formed.
The water-resistant sheet packing 22 is provided on the joint surface between the bottom plate 18 and the terminal block 24, and the seat packing 25 for refrigerator is provided on the joint surface between the bottom surface 18 and the terminal block 24.
And are fastened with bolts.
【0032】電源接続導線31は防水ねじ込保護管継手
29を通して配設しているため、裸充電部分および絶縁
充電部分が外部と隔離されて、かつ、水密性を有する防
水構造である。この水密性を有する防水構造の電動機用
電源接続端子箱9は、水が端子箱9内に浸入しないよう
になっている。端子箱9は請求項2及び3の半密閉形圧
縮機にも適用する。Since the power supply connecting wire 31 is disposed through the waterproof screw-in protection pipe joint 29, the naked charging portion and the insulated charging portion are isolated from the outside and have a watertight waterproof structure. The watertight power supply terminal box 9 for a motor having a watertight structure prevents water from entering the terminal box 9. The terminal box 9 is also applicable to the semi-hermetic compressor according to claims 2 and 3.
【0033】ここで、防水構造の定義は、日本工業規格
JISF8001「船舶用電気機器の防水試験」すなわち、機体
から3mの距離から内径12.5mm 以上のノズルで水頭
8mの水圧でいろいろな方向から通算10分間注水して
も、機体内部に水が浸入しない構造であることをいう。Here, the definition of the waterproof structure is based on Japanese Industrial Standard.
JISF8001 "Waterproof test for marine electrical equipment", i.e., water does not penetrate into the airframe even when water is injected from a distance of 3m from the airplane with a nozzle with an inner diameter of 12.5mm or more and a head pressure of 8m from various directions for a total of 10 minutes from various directions. It is a structure.
【0034】次に図4を参照して圧縮機保護装置および
冷凍機ユニットの冷凍サイクル構成について説明する。Next, the refrigerating cycle configuration of the compressor protection device and the refrigerating unit will be described with reference to FIG.
【0035】図4は本発明の一実施例の半密閉形スクリ
ュー圧縮機の圧縮機保護装置および冷凍機ユニットの冷
凍サイクル構成を示す系統図である。図4で、1は図1
に示した半密閉形スクリュー圧縮機に相当する。32は
圧縮機1に対する吸入配管、33は圧縮機1に対する吐
出配管、34は圧縮機1で圧縮されて、高温,高圧にな
った冷媒ガスを冷却,凝縮して液冷媒を生成させる凝縮
器、35は減圧器、36は液冷媒を蒸発させて、被冷却
物から蒸発熱を奪って冷却する蒸発器である。FIG. 4 is a system diagram showing the construction of a refrigerating cycle of a compressor protection device and a refrigerating unit of a semi-hermetic screw compressor according to one embodiment of the present invention. In FIG. 4, 1 is FIG.
Corresponds to the semi-hermetic screw compressor shown in FIG. 32 is a suction pipe for the compressor 1, 33 is a discharge pipe for the compressor 1, 34 is a condenser for cooling and condensing a high-temperature, high-pressure refrigerant gas compressed by the compressor 1 to generate a liquid refrigerant, Reference numeral 35 denotes a pressure reducer, and reference numeral 36 denotes an evaporator that evaporates the liquid refrigerant, removes heat of evaporation from the object to be cooled, and cools the object.
【0036】これら圧縮機1,凝縮器34,蒸発器35
を吸入配管32,吐出配管33などの冷媒配管で接続し
て冷凍サイクルが構成されている。The compressor 1, condenser 34, and evaporator 35
Are connected by refrigerant pipes such as a suction pipe 32 and a discharge pipe 33 to form a refrigeration cycle.
【0037】圧縮機1に対し導管37Aで高圧圧力スイ
ッチ38が、導管37Bで低圧圧力スイッチ39がそれ
ぞれ接続されている。また吐出配管33には感温筒40
が装着され、この感温筒40には導管41を介して吐出
ガス温度スイッチ42が接続されている。A high pressure switch 38 is connected to the compressor 1 via a conduit 37A, and a low pressure switch 39 is connected via a conduit 37B. A temperature sensing tube 40 is connected to the discharge pipe 33.
A discharge gas temperature switch 42 is connected to the temperature sensing cylinder 40 via a conduit 41.
【0038】高圧圧力スイッチ38は圧縮機1の吐出圧
力が異常に上昇した場合、設定値の公差内で作動し圧縮
機の運転を自動的に停止する。When the discharge pressure of the compressor 1 rises abnormally, the high pressure switch 38 operates within the set value tolerance and automatically stops the operation of the compressor.
【0039】低圧圧力スイッチ39は圧縮機の吸入圧力
が異常に低下した場合、設定値の公差内で作動し、圧縮
機の運転を自動的に停止する。When the suction pressure of the compressor drops abnormally, the low-pressure switch 39 operates within the tolerance of the set value, and automatically stops the operation of the compressor.
【0040】吐出ガス温度スイッチ42は、圧縮機の吐
出ガス温度が異常に上昇した場合、設定値の公差内で作
動し圧縮機の運転を自動的に停止する。When the discharge gas temperature of the compressor rises abnormally, the discharge gas temperature switch 42 operates within the set value tolerance and automatically stops the operation of the compressor.
【0041】これらの圧力スイッチや温度スイッチには
防水構造を適用している。A waterproof structure is applied to these pressure switches and temperature switches.
【0042】図1ないし図4を参照して説明した各実施
例で、スクリュー圧縮機を圧縮機構部と電動機とを同一
ケーシングに内蔵し、さらに電動機用電源接続端子箱に
防水構造を適用した半密閉形圧縮機とし、防水構造の圧
力スイッチ,温度スイッチなどの保護装置を具備してい
るので、雨水や水滴のかかる屋外設置の冷却設備やトン
ネル内などの高湿度環境に設置され土砂の付着を水洗い
する冷却設備の防水形冷凍機ユニットに搭載するのに必
要な防水性能を備えた半密閉形スクリュー圧縮機装置を
得ることができる。In each of the embodiments described with reference to FIGS. 1 to 4, the screw compressor is built in the same casing as the compression mechanism and the electric motor, and is further provided with a waterproof structure applied to the electric power supply connection terminal box. Since it is a hermetic compressor and equipped with a protection device such as a pressure switch and temperature switch with a waterproof structure, it is installed in a high-humidity environment such as a cooling facility installed outdoors or a tunnel where rainwater or water droplets are splashed. It is possible to obtain a semi-hermetic screw compressor device having the waterproof performance required for mounting on a waterproof refrigerator unit of a cooling facility for washing with water.
【0043】図4に示すように、冷媒ガスを圧縮する圧
縮機1と圧縮されて高温,高圧になった冷媒ガスを冷
却,凝縮して液冷媒を生成させる凝縮器34とこの液冷
媒を蒸発させ被冷却物から蒸発熱を奪って冷却する蒸発
器35とを備えて冷凍サイクルを構成する冷凍装置にお
いて、前述した各実施形態の半密閉形圧縮機を用いるこ
とにより、保守作業の手間を減らし、据付面積が少なく
てすむ、信頼性の高い防水形冷凍機ユニットを提供する
ことができる。As shown in FIG. 4, a compressor 1 for compressing a refrigerant gas, a condenser 34 for cooling and condensing the refrigerant gas which has been compressed to a high temperature and a high pressure to generate a liquid refrigerant, and evaporating the liquid refrigerant In the refrigerating apparatus including the evaporator 35 for removing the heat of evaporation from the object to be cooled to form a refrigerating cycle, the use of the semi-hermetic compressors of the above-described embodiments reduces the maintenance work. A highly reliable waterproof refrigerator unit requiring a small installation area can be provided.
【0044】さらに、従来技術の開放形圧縮機を使用し
た防水形冷凍機ユニットと比較し、上述の如き半密閉形
圧縮機を使用した場合、次に示す効果がある。Further, when the above-described semi-hermetic compressor is used as compared with the waterproof refrigerator unit using the conventional open compressor, the following effects are obtained.
【0045】(1)電動機を内蔵した半密閉構造である
ため、軸封装置を必要とせず、したがって軸封要素の交
換も不要で、信頼性の向上とメンテナンスの簡素化を図
ることができる。(1) Since it has a semi-hermetic structure with a built-in motor, it does not require a shaft sealing device, and therefore does not require replacement of a shaft sealing element, thereby improving reliability and simplifying maintenance.
【0046】(2)電動機の芯出しが不要である。(2) No centering of the motor is required.
【0047】(3)据付面積が小さくなる。(3) The installation area is reduced.
【0048】[0048]
【発明の効果】本発明によれば、保守作業の手間を減ら
し、据付面積が少なくてすむ、信頼性の高い半密閉形圧
縮機およびそれを搭載する防水形冷凍機ユニットを提供
することができる。According to the present invention, it is possible to provide a highly reliable semi-hermetic compressor and a waterproof refrigerating unit equipped with the same which require less maintenance work and a smaller installation area. .
【図1】本発明の一実施形態に係る半密閉形スクリュー
圧縮機の構成を示す断面図。FIG. 1 is a sectional view showing a configuration of a semi-hermetic screw compressor according to an embodiment of the present invention.
【図2】図2は図1の半密閉形スクリュー圧縮機に具備
された電動機用電源接続端子箱の構成を示す平面図。FIG. 2 is a plan view showing a configuration of a power supply terminal box for a motor provided in the semi-hermetic screw compressor of FIG. 1;
【図3】図2の断面図。FIG. 3 is a sectional view of FIG. 2;
【図4】本発明の一実施形態に係る半密閉形スクリュー
圧縮機の圧縮機保護装置および冷凍機ユニットの冷凍サ
イクル構成を示す系統図。FIG. 4 is a system diagram showing a configuration of a refrigeration cycle of a compressor protection device and a refrigerator unit of a semi-hermetic screw compressor according to an embodiment of the present invention.
1…圧縮機構部、2…スクリューロータ、4…回転子、
5…固定子、7…ケーシング、9…電動機用電源接続端
子箱、10…油回収器、13…導線、14…端子ボル
ト、29…防水ねじ込保護管継手、38…高圧圧力スイ
ッチ、39…低圧圧力スイッチ、42…吐出ガス温度ス
イッチ。DESCRIPTION OF SYMBOLS 1 ... Compression mechanism part, 2 ... Screw rotor, 4 ... Rotor,
DESCRIPTION OF SYMBOLS 5 ... Stator, 7 ... Casing, 9 ... Power supply terminal box for electric motor, 10 ... Oil recovery unit, 13 ... Lead wire, 14 ... Terminal bolt, 29 ... Waterproof screw-in protective pipe joint, 38 ... High pressure switch, 39 ... Low pressure switch, 42 ... Discharge gas temperature switch.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 菊地 昭治 静岡県清水市村松390番地 株式会社日立 製作所空調システム事業部内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shoji Kikuchi 390 Muramatsu, Shimizu-shi, Shizuoka Pref. Air Conditioning Systems Division, Hitachi, Ltd.
Claims (1)
に噛み合って回転する雌雄一対のスクリューロータから
なる圧縮機構部とを直結して、分解可能なケーシング内
に収納し、前記ケーシングに前記固定子の導線を接続し
た気密性を有する端子構造に電動機用電源接続端子箱を
装着し、前記圧縮機構部の吐出側に油分離手段を内蔵し
た油回収器を前記ケーシングに気密性のあるフランジを
介して接合した半密閉形スクリュー圧縮機において、前
記電動機用電源接続端子箱は裸充電部分および絶縁充電
部分が外部と隔離された水密性を有する防水構造である
ことを特徴とする半密閉形スクリュー圧縮機。An electric motor including a stator and a rotor is directly connected to a compression mechanism comprising a pair of male and female screw rotors which rotate while meshing with each other, and are housed in a disassemblable casing. A power supply connection terminal box for an electric motor is mounted on an airtight terminal structure to which the conductor wires are connected, and an oil recovery device incorporating oil separation means on the discharge side of the compression mechanism is provided with an airtight flange on the casing. In a semi-hermetic screw compressor, the semi-hermetic screw compressor is characterized in that the power supply terminal box for the electric motor has a watertight waterproof structure in which a bare charging portion and an insulated charging portion are isolated from the outside. Compressor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9024746A JPH10220353A (en) | 1997-02-07 | 1997-02-07 | Semi-closed type screw compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9024746A JPH10220353A (en) | 1997-02-07 | 1997-02-07 | Semi-closed type screw compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10220353A true JPH10220353A (en) | 1998-08-18 |
Family
ID=12146719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9024746A Pending JPH10220353A (en) | 1997-02-07 | 1997-02-07 | Semi-closed type screw compressor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10220353A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107355363A (en) * | 2017-09-08 | 2017-11-17 | 浙江康利德科技有限公司 | Semi-hermetic reciprocating refrigeration compressor |
CN108431420A (en) * | 2015-12-25 | 2018-08-21 | 株式会社神户制钢所 | Screw compressor |
-
1997
- 1997-02-07 JP JP9024746A patent/JPH10220353A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108431420A (en) * | 2015-12-25 | 2018-08-21 | 株式会社神户制钢所 | Screw compressor |
CN108431420B (en) * | 2015-12-25 | 2019-11-15 | 株式会社神户制钢所 | Screw compressor |
CN107355363A (en) * | 2017-09-08 | 2017-11-17 | 浙江康利德科技有限公司 | Semi-hermetic reciprocating refrigeration compressor |
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