JPH03179187A - Refrigerant pump - Google Patents

Refrigerant pump

Info

Publication number
JPH03179187A
JPH03179187A JP31687189A JP31687189A JPH03179187A JP H03179187 A JPH03179187 A JP H03179187A JP 31687189 A JP31687189 A JP 31687189A JP 31687189 A JP31687189 A JP 31687189A JP H03179187 A JPH03179187 A JP H03179187A
Authority
JP
Japan
Prior art keywords
rotor
pump
sealed container
front plate
rear plate
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.)
Granted
Application number
JP31687189A
Other languages
Japanese (ja)
Other versions
JP2600404B2 (en
Inventor
Kiyoshi Sawai
清 澤井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP31687189A priority Critical patent/JP2600404B2/en
Publication of JPH03179187A publication Critical patent/JPH03179187A/en
Application granted granted Critical
Publication of JP2600404B2 publication Critical patent/JP2600404B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

PURPOSE:To miniaturize a pump, besides lighter in weight by installing a motor' s stator at the outside of a thin cylindrical vessel and a pumping mechanical part, a rotor and a drive shaft at the inside, respectively, and also installing an inlet port and an outlet port in a front plate and a rear plate each. CONSTITUTION:A stator 3 of a DC motor 2 is attached to the outside of a thin cylindrical hermetically sealed vessel 1, and a rotor 4 is set up at the inside. A hole 6 for a refrigerant passage is installed in this rotor 4. Each of rotors 9, 10, a front plate 12 and a rear plate 15 are installed in a pumping mechanical part 7, driving a drive shaft 18. An inlet port 14a is installed in this front plate 12 and, an outlet port 16 and an unpierced inlet port 14b both in the rear plate 15, respectively. A refrigerant is inhaled out of an inlet pipe 21 and compressed and then it is discharged to a discharge pipe 24 by way of the outlet port 16, the hole 6 and a hole 25. Therefore the hermetically sealed vessel becomes lighter in weight and compact in size, besides thin, small diameter structure, through which it inhales a solvent from both sides of the rotor so that pump efficiency is improved.

Description

【発明の詳細な説明】 産業上の利用分野 本発明41  ルームニアコンディショナー等に使用し
 冷媒を搬送する冷媒ポンプに関するものでも 従来の技術 冷媒ポンプにおいて、密閉型圧縮機(図示せず)のよう
にポンプ機構部と電動機とを一つの密閉容器の中に収め
ると、接続端子や電動機のコイル部が液冷媒に浸かって
しまうので、電流洩れが発生ずん まな ポンプ機構部
と電動機とをそれぞれの容器に納吹 軸によって動力を
伝達しようとすると、軸受部でのシールを完全に行なう
ことが非常に困難である。ここ玄 従来の冷媒ポンプの
一例を、第5図に示す。従来 この種の冷媒ポンプ(よ
 第5図に示すようにポンプ機構部31と電動機32と
を非磁性体の仕切り板33で区切り、電動機32の動力
を磁気カップリング34を介してポンプ機構部31に伝
えるようにしていf、  (特開昭62−111183
号公報) 発明が解決しようとする課題 ところ力丈 上記従来の冷媒ポンプにおいて(よポンプ
機構部31を収める密閉容器35と、電動機32を固定
する枠36とがそれぞれ必要で、冷媒ポンプが大きく重
くなるという欠点があっ1.  また 動力の伝達用に
磁気カップリング34を使用しているた吹 外形寸法が
大きくなるし 価格が高くなるという欠点があった ま
た 電動機32の回転軸37の軸中心線と密閉容器35
内に収納しであるポンプ機構部の軸38の中心線とがず
れた状態で冷媒ポンプを組み立てると、軸心ずれに伴う
トルク変動でポンプ機構部31が良好に作動しなくなっ
てしまうという問題点かあっ1.  従って、組立には
厳しい精度が要求された また 負荷や回転数が急変し
た啄 磁気カップリング34が脱調してしま1.L  
運転ができなくなるという問題も生じていt4  本発
明(上 上記従来の欠点を無くするもの玄 その第1の
目的1よ 構造が単純で小型軽量でかつ体積効率および
ポンプ効率が高い冷媒ポンプを提供することにあも ま
た 本発明の第2の目的Cヨ  部品点数が少なく価格
の安い冷媒ポンプを提供することにあも 課題を解決するための手段 上記第1の目的を達成するために本発明1上 薄肉の円
筒形の密閉容器の外側に電動機の固定子を取り付け、一
方密閉容器の内側に(よ シリンダ、ポンプロータ、 
フロントプレート、リアプレート等で構成されるポンプ
機構部と、電動機の回転子と、駆動軸とを配設し フロ
ントプレートには貫通する吸入ポートを設け、 リアプ
レートには貫通する吐出ポートと窪み状の吸入ポートを
設け、さらに そのフロントプレートおよびシリンダの
外周部の一部を切り欠いて、フロントプレートからリア
プレート上の吸入ポートに通じる吸入通路を設けるとと
も&へ そのリアプレートによって、密閉容器内を吸入
圧力空間と吐出圧力空間とに分離したものであも また
 上記第2の目的を達成するために本発明(友 薄肉の
円筒形の密閉容器の外側に電動機の固定子を取り付(す
、一方密閉容器の内側にζよ シリンダ、ポンプロータ
、 フロントプレート、 リアプレート等で構成される
ポンプ機構部と、電動機の回転子と、駆動軸とを配設し
 前記密閉容器の鏡板の中央部を円筒状に形威し 前記
駆動軸を支承する一方の軸受と吐出管とを、前記円筒内
に対向して配設し さらに軸受と吐出管の中間部の円筒
に冷媒通路となる複数の穴をあけたものである。
[Detailed Description of the Invention] Industrial Field of Application This invention 41 relates to a refrigerant pump for conveying refrigerant used in a roomier conditioner, etc. In the conventional refrigerant pump, such as a hermetic compressor (not shown), If the pump mechanism and electric motor are placed in one sealed container, the connection terminals and the motor coil will be immersed in the liquid refrigerant, resulting in current leakage. Nabuki: When trying to transmit power through a shaft, it is extremely difficult to achieve a perfect seal at the bearing. Figure 5 shows an example of a conventional refrigerant pump. Conventionally, this type of refrigerant pump (as shown in FIG. (Japanese Unexamined Patent Publication No. 111183/1983)
Issues to be Solved by the Invention: Strength The conventional refrigerant pump described above requires an airtight container 35 for housing the pump mechanism 31 and a frame 36 for fixing the electric motor 32, making the refrigerant pump large and heavy. 1. Also, since the magnetic coupling 34 is used for power transmission, the external dimensions become larger and the price becomes higher. and airtight container 35
If the refrigerant pump is assembled with the center line of the shaft 38 of the pump mechanism section housed inside the pump being misaligned, the problem is that the pump mechanism section 31 will not operate properly due to torque fluctuations caused by the axis misalignment. Kaa 1. Therefore, strict precision was required for assembly.Also, if the load or rotation speed changed suddenly, the magnetic coupling 34 would lose synchronization.1. L
The present invention (above) eliminates the above-mentioned drawbacks of the conventional technology.First object 1: To provide a refrigerant pump with a simple structure, small size and light weight, and high volumetric efficiency and pump efficiency. In addition, the second object of the present invention is to provide a refrigerant pump with a small number of parts and a low price.Means for solving the problems In order to achieve the above first object, the present invention 1 The stator of the electric motor is attached to the outside of the thin-walled cylindrical sealed container, while the cylinder, pump rotor,
The pump mechanism consists of a front plate, a rear plate, etc., a motor rotor, and a drive shaft.The front plate has a penetrating suction port, and the rear plate has a penetrating discharge port and a recessed part. A suction port is provided on the front plate and a part of the outer periphery of the cylinder is cut out to provide a suction passage leading from the front plate to the suction port on the rear plate. In order to achieve the above-mentioned second object, the stator of the electric motor is attached to the outside of the thin-walled cylindrical airtight container. On the other hand, a pump mechanism section consisting of a cylinder, a pump rotor, a front plate, a rear plate, etc., a rotor of an electric motor, and a drive shaft are arranged inside the sealed container, and the central part of the end plate of the sealed container is arranged. has a cylindrical shape, one of the bearings supporting the drive shaft and a discharge pipe are disposed facing each other in the cylinder, and a plurality of holes are formed in the cylinder at an intermediate portion between the bearing and the discharge pipe to serve as refrigerant passages. It is an open one.

作用 上記手段による作用(よ 以下のとおりであも本発明に
よる第1の手段によれば 円筒形の密閉容器を電動機の
固定子の内側に取り付けているたべ 密閉容器の外径が
小さくなり、ポンプ全体が小型軽量になん また フロ
ントプレートには貫通する吸入ポートを設け、リアプレ
ートには吐出ポートおよび窪み状の吸入ポートを設け、
フロントプレートおよびシリンダの外周部の一部を切り
欠いて、フロントプレートからリアプレート上の吸入ポ
ートに通じる吸入通路を設けているので、ポンプロータ
は前後両サイドから液冷媒を吸入することができ、冷媒
を吸入する時の圧力損失が小さくなって、ポンプの体積
効率およびポンプ効率が向上すも このとき、リアプレ
ートが密閉容器内を吸入圧力空間と吐出圧力空間とに分
離する役目を兼ねる構成となっているた吹 ポンプ全体
が単純な構造となっていも さらに 本発明による第2
の手段によれば 密閉容器の鏡板の中央部を円筒状に形
成し 駆動軸を支承する一方の軸受と吐出管とを、その
円筒内に対向して配設したものであるか転 鏡板が軸受
の支持をも兼ね備えることになり、部品点数が少なくな
ってポンプの価格が安くなる。
Effects of the above-mentioned means (y) However, according to the first means of the present invention, a cylindrical sealed container is attached inside the stator of the electric motor.The outer diameter of the sealed container is reduced, and the pump The entire structure is small and lightweight.The front plate has a penetrating suction port, and the rear plate has a discharge port and a recessed suction port.
A portion of the outer periphery of the front plate and cylinder is cut out to provide a suction passage leading from the front plate to the suction port on the rear plate, allowing the pump rotor to suck in liquid refrigerant from both the front and rear sides. The pressure loss when suctioning the refrigerant is reduced, and the volumetric efficiency and pump efficiency of the pump are improved.At this time, the rear plate is configured to also serve to separate the inside of the sealed container into a suction pressure space and a discharge pressure space. Even if the entire pump has a simple structure, the second blowing pump according to the present invention
According to this method, the central part of the head plate of the closed container is formed into a cylindrical shape, and one bearing that supports the drive shaft and the discharge pipe are arranged facing each other in the cylinder, or the head plate is the bearing. This also reduces the number of parts and reduces the price of the pump.

実施例 以X 本発明の一実施例について図面を参考に説明すも
 第1図1友 本発明の一実施例における冷媒ポンプの
断面図であも 同図において、 ■は薄肉の円筒形の密
閉容器で、はぼ中央に2つの段差1aとlbを設けてい
も 2はブラシレス直流電動機であって、固定子3と回
転子4より構成していも 密閉容器lの外側に固定子3
を取り付ζす、回転子4は密閉容器1の内側に配設して
いも 2は直流電動機であるので、回転子4は最外周部
に磁石5を張り付けている。回転子4の中心部には駆動
軸18が圧入してあり、駆動軸18は電動機2で発生し
た回転力を伝達すム さら番ζ 回転子4に(よ 冷媒
の流路となる孔6カt 駆動軸18軸線方向に複数本設
けてあ7107はポンプ機構部であって、このポンプ機
構部7(表 トロコイド曲線よりなるインナーロータ9
と、インナーロータ9と噛合ってポンプ室11を構成す
るアウターロータ10とをシリンダ8内に納△ フロン
トプレート12とリアプレート15とで挟みこム ボル
ト17によって固定して、構成していも インナーロー
タ9とアウターロータ10が噛合ってポンプ室11を形
成している状態を、第2図(第1図のA−A断面)に示
していも フロントプレート12に(上 中心部に駆動
軸18を支承する第1の軸受13を配設するとともに 
第3図に示す貫通した吸入ボーH4aを設けていもリア
プレート15にζ友 第4図に示す吸入ポート14bと
吐出ポー)16を設けていも ここで、吐出ポート16
はリアプレート15を貫通している力丈 吸入ポート1
4bは窪み状のポートであってリアプレーH5を貫通し
ていなl、Xo  まt、、フロントプレート12およ
びシリンダ8の外周部にζ戴 リアプレート15の吸入
ポート14bの方向にそれぞれ切り欠き28と29を設
けていも これらの切り欠き28と29および吸入ポー
ト14bはつながって吸入通路30を形成してい、L 
 19G−!、  ポンプ機構部7の外周部と密閉容器
1の間に位置する中間殻であって、密閉容器1より厚さ
の厚い円筒で構成していも また この中間殻19の内
面に(上 段差19aが付けてあも20は吸入側の鏡板
であって、外に向かって凹形状の状態で密閉容器lに差
込次 中間殻19とともに密閉容器1に端部27の位置
で溶接し固定していもまた 鏡板20の中央にCL  
吸入管21を取り付けてい、4 −X  22は吐出側
の鏡板であって、その中央部を円筒状に形成していも 
そして、その円筒内に(よ 駆動軸18を支承する第2
の軸受23と吐出管24とを互いに対向させて配設して
いも さらに第2の軸受23と吐出管24との中間の円
筒部に!よ液冷媒が通る穴25を複数個設けていも 鏡
板22についてk 密閉容器lの外側に向けて凹形状の
状態で密閉容器lに差し込へ 外周部26で円周溶接し
て、密閉容器lに固定していモ28は電動機固定子2の
カバーであも 次に このような構成による冷媒ポンプ
の動作について説明すも 電動機の回転子4が回転する
と、回転子4に圧入しである駆動軸18が回転すん 第
2図に示すように 駆動軸18はインナーロータ9の穴
に嵌合しているので、駆動軸18が回転すると、インナ
ーロータ9も矢印の方向に回転すも この隊 アウター
ロータ10はインナーロータ9と噛合っているの玄 ア
ウターロータIOもインナーロータ9に伴って矢印の方
向に回転すん これによって、ポンプ室111上その体
積を順次場力代 減少させながら矢印の方向に回転する
ので、ポンプ作用が発生する。ポンプ機構部7でポンプ
作用が発生すると、液冷媒が吸入管21から吸い込まれ
 密閉容器1内に人も 密閉容器1内に入った液冷媒(
よ 一部がフロントプレート12の吸入ポート14を経
てポンプ室11に入り込仏 他鬼 残りの液冷媒41 
 フロントプレート12の切り欠き28とシリンダ8の
切り欠き29とで構成される吸入通路30を通り、 リ
アプレート15の吸入ポート14bよりポンプ室11に
流れ込む。そして液冷媒(よ ポンプ室11内で昇圧さ
れた抵 リアプレー)15にあけた吐出ポート16を経
て、密閉容器l内へ再び出も この恢 液冷媒(よ 電
動機の回転子4にあけた冷媒流路6を通り、さらに鏡板
22にあけた穴25を通った眞 吐出管24を経て密閉
容器lの外へ出て行く。このようにして、ポンプとして
の機能が発揮されるのであん 本実施例ポンプにおいて
(上 円筒形の密閉容器lを電動機の固定子3の内側に
取り付ける構造としているの型密閉容器1の外径が小さ
くなっていも 密閉容器lの外径が小さくなると、圧力
容器である密閉容器lの肉厚を従来より格段に薄くする
ことができるので、ポンプ全体が軽くなる。また 電動
機の固定子3と回転子4それら自体爪 密閉容器lを挟
んで、磁気カップリングの役目を果しているので、従来
の磁石カップリングが必要なくなり、全体の構造が簡単
になっている。さらに 本ポンプにはポンプロータ9.
10の前後両サイドに吸入通路が存在するので、ポンプ
ロータ9.10は二つの方向から液冷媒を吸入すること
ができ、吸入時の圧力損失が小さくなも 一般に 液冷
媒はわずかの圧力低下によって気化するという特性を有
しているので、このように吸入時の圧力低下が減少する
と吸入通路内で気泡が発生しにくくなり、ポンプの体積
効率が向上すも すると、ポンプロータ9.10内での
動力損失も少なくなって、ポンプ効率が向上する。さら
に このような吸入通路が二つ存在する構成にもかかわ
ら哄 リアプレート15が密閉容器l内を吸入圧力空間
と吐出圧力空間とに分離する役目を兼ねているた△ ポ
ンプ全体が単純な構造となっていも また 吐出側の鏡
板22は軸受23の支持をも兼ねているた△ 軸受23
の支持体を新たに設ける必要もな(1これ(上 鏡板2
2の円筒部内に軸受23と吐出管24とを対向して配設
し 軸受23と吐出管24の中間の円筒部に穴25を複
数個設けて冷媒の通路にしたことにより、実現していも
 このような構成にすることによって部品点数が少なく
なり、ポンプの価格が安くなも また 軸受23の支持
体が存在する場合には この支持体を密閉容器lに溶接
固定すると、この溶接によって薄肉の密閉容器1が歪ん
でしまう力t この実施例のような構成であれば組み立
て時の溶接歪を最小に抑えることもできも な叙 本発
明は上述した実施例に限定されるものではな(1例えば
本実施例ではポンプ機構部7にトロコイドロータを使用
している力交 他のポンプ機構を使用してもよ(1 発明の効果 上記の実施例より明らかなように 本発明は次に示す結
果を有するものであも (1)薄肉の円筒形の密閉容器の外側に電動機の固定子
を取り付(す、一方密閉容器の内側には シリンタt 
ポンプロータ、 フロントプレート、リアプレートを有
するポンプ機構部と、電動機の回転子と、駆動軸とを配
設したものであるか板 密閉容器の外径を小さくするこ
とができ、そして、密閉容器の外径が小さくなると、密
閉容器の肉厚をも格段に薄くすることができるの六 ポ
ンプ全体が小型軽量になん さらに 本発明によればポ
ンプロータの前後両サイドから液冷媒を吸入することが
できるので、吸入時の圧力損失が小さくなり、ポンプの
体積効率およびポンプ効率が向上すもそして、このよう
な吸入通路が二つ存在する構成にもかかわらず、 リア
プレートが吸入圧力空間と吐出圧力空間とに分離する役
目を兼ねているたべ単純な構造にすることができも (2)また 本発明によれば 密閉容器の鏡板の中央部
を円筒状に形成し 前記駆動軸を支承する一方の軸受と
吐出管とを、その円筒内に対向して配設したものである
か収 鏡板が軸受の支持をも兼ね備えることになり、部
品点数が少なくなってポンプの価格が安くなも
Embodiment X An embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a sectional view of a refrigerant pump in an embodiment of the present invention. In the figure, Even if the container has two steps 1a and lb in the center of the container, 2 is a brushless DC motor and is composed of a stator 3 and a rotor 4. The stator 3 is placed on the outside of the closed container 1.
Even though the rotor 4 is installed inside the closed container 1, the rotor 4 has magnets 5 attached to its outermost periphery since 2 is a DC motor. A drive shaft 18 is press-fitted into the center of the rotor 4, and the drive shaft 18 has six holes that transmit the rotational force generated by the electric motor 2. t A plurality of shafts 7107 are provided in the axial direction of the drive shaft 18, and this pump mechanism section 7 (Table 1) has an inner rotor 9 formed of a trochoid curve.
and an outer rotor 10 that meshes with the inner rotor 9 to form a pump chamber 11 are housed in the cylinder 8. The inner The state in which the rotor 9 and the outer rotor 10 mesh to form the pump chamber 11 is shown in FIG. 2 (cross section A-A in FIG. 1). A first bearing 13 is disposed to support the
Even if a penetrating suction port H4a shown in FIG. 3 is provided, or a suction port 14b and a discharge port 16 shown in FIG.
is the length of the force that penetrates the rear plate 15 Suction port 1
4b is a recessed port that does not penetrate the rear plate H5, and is provided on the outer periphery of the front plate 12 and the cylinder 8. A notch 28 is provided in the direction of the suction port 14b of the rear plate 15, respectively. 29, these notches 28 and 29 and the suction port 14b are connected to form the suction passage 30, and the L
19G-! , an intermediate shell located between the outer periphery of the pump mechanism section 7 and the closed container 1, and may be formed of a cylinder thicker than the closed container 1. The attachment frame 20 is an end plate on the suction side, which is inserted into the sealed container l in a concave shape facing outward. In addition, there is a CL in the center of the mirror plate 20.
A suction pipe 21 is attached, and 4-X 22 is an end plate on the discharge side, the center of which may be formed into a cylindrical shape.
Then, within the cylinder, there is a second shaft that supports the drive shaft 18.
Even if the second bearing 23 and the discharge pipe 24 are arranged to face each other, the second bearing 23 and the discharge pipe 24 are arranged in the intermediate cylindrical part! Even if multiple holes 25 are provided for the liquid refrigerant to pass through, the end plate 22 should be inserted into the sealed container l in a concave shape toward the outside of the sealed container l.Weld the circumference at the outer periphery 26 and close the sealed container l. 28 is a cover for the motor stator 2.Next, we will explain the operation of a refrigerant pump with such a configuration.When the rotor 4 of the electric motor rotates, the drive shaft, which is press-fitted into the rotor 4, As shown in Figure 2, the drive shaft 18 is fitted into the hole in the inner rotor 9, so when the drive shaft 18 rotates, the inner rotor 9 also rotates in the direction of the arrow. 10 is in mesh with the inner rotor 9. The outer rotor IO also rotates in the direction of the arrow along with the inner rotor 9. As a result, the volume of the pump chamber 111 is sequentially reduced by the field force while rotating in the direction of the arrow. Therefore, a pumping action occurs. When the pump action occurs in the pump mechanism 7, the liquid refrigerant is sucked from the suction pipe 21, and the liquid refrigerant (
A portion of the liquid refrigerant enters the pump chamber 11 through the suction port 14 of the front plate 12.The remaining liquid refrigerant 41
It passes through a suction passage 30 formed by a notch 28 in the front plate 12 and a notch 29 in the cylinder 8, and flows into the pump chamber 11 from the suction port 14b in the rear plate 15. Then, the liquid refrigerant (resistance pump pressurized in the pump chamber 11) passes through the discharge port 16 in the airtight container 15 and flows out again into the closed container l. It passes through the passage 6, and then passes through the hole 25 made in the end plate 22, and then exits the closed container l through the discharge pipe 24. In this way, the function as a pump is demonstrated. In a pump (above), a cylindrical sealed container l is attached inside the stator 3 of an electric motor.Even if the outer diameter of the sealed container l becomes smaller, it becomes a pressure vessel Since the wall thickness of the sealed container l can be made much thinner than before, the entire pump becomes lighter.In addition, the stator 3 and rotor 4 of the electric motor have their own claws that sandwich the sealed container l and perform the role of magnetic coupling. This eliminates the need for conventional magnetic couplings, simplifying the overall structure.Furthermore, this pump is equipped with a pump rotor.
Since there are suction passages on both sides of the pump rotor 9 and 10, the pump rotor 9 and 10 can suck liquid refrigerant from two directions, and the pressure loss during suction is small. Since it has the characteristic of vaporizing, if the pressure drop during suction is reduced in this way, bubbles are less likely to be generated in the suction passage, and the volumetric efficiency of the pump is improved. Power loss is also reduced, improving pump efficiency. Furthermore, despite the configuration in which there are two suction passages, the entire pump has a simple structure because the rear plate 15 also serves to separate the inside of the closed container l into a suction pressure space and a discharge pressure space. Even if it is, the end plate 22 on the discharge side also serves as support for the bearing 23. Bearing 23
There is no need to provide a new support for (1) this (upper mirror plate 2)
This can be realized by arranging the bearing 23 and the discharge pipe 24 facing each other in the cylindrical part 2, and by providing a plurality of holes 25 in the cylindrical part between the bearing 23 and the discharge pipe 24 to serve as passages for the refrigerant. This configuration reduces the number of parts and lowers the price of the pump.Also, if a support body for the bearing 23 is present, if this support body is welded and fixed to the closed container l, this welding will reduce the thickness of the thin wall. The force t that distorts the sealed container 1 If the configuration of this embodiment is used, welding distortion during assembly can be minimized. The present invention is not limited to the above-mentioned embodiment (1 For example, in this embodiment, a trochoid rotor is used for the pump mechanism section 7, but other pump mechanisms may also be used. (1) The stator of the electric motor is attached to the outside of the thin-walled cylindrical sealed container, while the cylinder t is installed inside the sealed container.
A pump mechanism unit including a pump rotor, a front plate, and a rear plate, a rotor of an electric motor, and a drive shaft are arranged. As the outer diameter becomes smaller, the wall thickness of the sealed container can be made much thinner.6 The entire pump becomes smaller and lighter.Furthermore, according to the present invention, liquid refrigerant can be sucked from both the front and rear sides of the pump rotor. Therefore, the pressure loss during suction is reduced, and the volumetric efficiency and pump efficiency of the pump are improved. (2) According to the present invention, the central part of the end plate of the sealed container is formed into a cylindrical shape, and one of the bearings supporting the drive shaft can be made into a simple structure. By arranging the pump and the discharge pipe facing each other in the cylinder, the collecting plate also supports the bearing, which reduces the number of parts and makes the pump cheaper.

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

第1図は本発明の一実施例を示す冷媒ポンプのる。 FIG. 1 shows a refrigerant pump showing an embodiment of the present invention.

Claims (2)

【特許請求の範囲】[Claims] (1)薄肉の円筒形の密閉容器の外側に電動機の固定子
を取り付け、前記密閉容器の内側に、シリンダ、ポンプ
ロータ、フロントプレート、リアプレートを有するポン
プ機構部と、電動機の回転子と、その回転子の回転力を
前記ポンプ機構部に伝達する駆動軸とを配設し、前記フ
ロントプレートには貫通する吸入ポートを設け、前記リ
アプレートには貫通する吐出ポートと窪み状の吸入ポー
トを設け、前記フロントプレートおよび前記シリンダの
外周部の一部を切り欠いて、前記フロントプレートから
前記リアプレート上の吸入ポートに通じる吸入通路を設
けるとともに前記リアプレートによって、前記密閉容器
内を吸入圧力空間と吐出圧力空間とに分離してなる冷媒
ポンプ。
(1) A stator of an electric motor is attached to the outside of a thin-walled cylindrical sealed container, and a pump mechanism section having a cylinder, a pump rotor, a front plate, and a rear plate is provided inside the sealed container, and a rotor of the electric motor; A drive shaft is provided to transmit the rotational force of the rotor to the pump mechanism, the front plate is provided with a penetrating suction port, and the rear plate is provided with a penetrating discharge port and a recessed suction port. A part of the outer periphery of the front plate and the cylinder is cut out to provide a suction passage leading from the front plate to the suction port on the rear plate, and the rear plate creates a suction pressure space inside the sealed container. A refrigerant pump that is separated into a space and a discharge pressure space.
(2)薄肉の円筒形の密閉容器の外側に電動機の固定子
を取り付け、前記密閉容器の内側に、シリンダ、ポンプ
ロータ、フロントプレート、リアプレートを有するポン
プ機構部と、電動機の回転子と、その回転子の回転力を
前記ポンプ機構部に伝達する駆動軸とを配設し、前記密
閉容器の鏡板の中央部を円筒状に形成し、前記駆動軸を
支承する一方の軸受と吐出管とを前記円筒内で対向して
配設し、前記軸受と前記吐出管の中間部の円筒に冷媒通
路となる複数の穴をあけてなる冷媒ポンプ。
(2) A stator of an electric motor is attached to the outside of a thin-walled cylindrical sealed container, and a pump mechanism section having a cylinder, a pump rotor, a front plate, and a rear plate is provided inside the sealed container, and a rotor of the electric motor; A drive shaft for transmitting the rotational force of the rotor to the pump mechanism is disposed, the central part of the end plate of the sealed container is formed into a cylindrical shape, and one bearing supporting the drive shaft and a discharge pipe are disposed. are arranged to face each other in the cylinder, and a plurality of holes are bored in the cylinder at an intermediate portion between the bearing and the discharge pipe to serve as refrigerant passages.
JP31687189A 1989-12-06 1989-12-06 Refrigerant pump Expired - Fee Related JP2600404B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31687189A JP2600404B2 (en) 1989-12-06 1989-12-06 Refrigerant pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31687189A JP2600404B2 (en) 1989-12-06 1989-12-06 Refrigerant pump

Publications (2)

Publication Number Publication Date
JPH03179187A true JPH03179187A (en) 1991-08-05
JP2600404B2 JP2600404B2 (en) 1997-04-16

Family

ID=18081842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31687189A Expired - Fee Related JP2600404B2 (en) 1989-12-06 1989-12-06 Refrigerant pump

Country Status (1)

Country Link
JP (1) JP2600404B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7040875B2 (en) * 2002-04-24 2006-05-09 Matsushita Electric Industrial Co., Ltd. Refrigerant pump with rotors in bearing
EP3104011A1 (en) 2015-06-09 2016-12-14 Panasonic Corporation Liquid pump and rankine cycle system
GB2559747A (en) * 2017-02-15 2018-08-22 Magpumps Ltd Pump and method of operation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7040875B2 (en) * 2002-04-24 2006-05-09 Matsushita Electric Industrial Co., Ltd. Refrigerant pump with rotors in bearing
EP3104011A1 (en) 2015-06-09 2016-12-14 Panasonic Corporation Liquid pump and rankine cycle system
JP2017002793A (en) * 2015-06-09 2017-01-05 パナソニック株式会社 Liquid pump and Rankine cycle device
US9989055B2 (en) 2015-06-09 2018-06-05 Panasonic Corporation Liquid pump and rankine cycle system
GB2559747A (en) * 2017-02-15 2018-08-22 Magpumps Ltd Pump and method of operation

Also Published As

Publication number Publication date
JP2600404B2 (en) 1997-04-16

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