JP2020051256A - Brushless motor integrated pump - Google Patents

Brushless motor integrated pump Download PDF

Info

Publication number
JP2020051256A
JP2020051256A JP2018177937A JP2018177937A JP2020051256A JP 2020051256 A JP2020051256 A JP 2020051256A JP 2018177937 A JP2018177937 A JP 2018177937A JP 2018177937 A JP2018177937 A JP 2018177937A JP 2020051256 A JP2020051256 A JP 2020051256A
Authority
JP
Japan
Prior art keywords
pressure side
low
gear pump
pump
motor
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
Application number
JP2018177937A
Other languages
Japanese (ja)
Inventor
晃行 若林
Akiyuki Wakabayashi
晃行 若林
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.)
Nikki Co Ltd
Original Assignee
Nikki 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 Nikki Co Ltd filed Critical Nikki Co Ltd
Priority to JP2018177937A priority Critical patent/JP2020051256A/en
Priority to US16/578,263 priority patent/US20200095997A1/en
Publication of JP2020051256A publication Critical patent/JP2020051256A/en
Pending legal-status Critical Current

Links

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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0096—Heating; Cooling
    • 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
    • F04C2240/00—Components
    • F04C2240/40—Electric motor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

To achieve high efficiency and high durability and to selectively use at least one of a low pressure-side operation medium and a high pressure-side operation medium, in a brushless motor integrated pump integrally having gear pumps in two systems and a motor for applying driving force to the gear pumps while using a rotating shaft in common.SOLUTION: A high pressure-side operation medium 10b pressurized by being allowed to successively flow into a low pressure-side gear pump 5a and a high pressure-side gear pump 5b using a rotating shaft 6 of a brushless motor 7 in common as a driving source, is introduced into a motor case 4, and then allowed to flow out from a case body discharge port 41 formed on a motor cover 3. A low pressure outflow passage 11 of a low pressure-side operation medium 10a flowing out of the low pressure-side gear pump 5a, and a high pressure outflow passage 12 of the high pressure-side operation medium 10b flowing out of the high pressure-side gear pump 5b are disposed, and the low pressure outflow passage 11 and the high pressure outflow passage 12 are communicated by a connection passage 14 including a check valve 13 opened to the low pressure outflow passage 11 side.SELECTED DRAWING: Figure 1

Description

本発明は、ランキンサイクルを初めとする、廃熱回収システムの作動媒体を圧送するための歯車ポンプと、前記歯車ポンプと回転軸を共用し、前記歯車ポンプへ駆動力を付加するためのモーターとを一体に有するブラシレスモーター一体型ポンプに関し、特に、歯車ポンプとして複数系統の回転ポンプを備えたものに関する。   The present invention provides a gear pump for pumping a working medium of a waste heat recovery system, including a Rankine cycle, and a motor for sharing a rotating shaft with the gear pump and adding a driving force to the gear pump. The present invention relates to a brushless motor-integrated pump integrally having a rotary pump, and more particularly to a pump provided with a plurality of systems of rotary pumps as a gear pump.

昨今、廃熱回収システムの作動媒体などを圧送するために、ブラシレスモーターに歯車ポンプを一体化して回転軸を共用する構造として、かつ高効率・高耐久性を実現可能なブラシレスモーター一体型ポンプが、特開２０１６−１０１０４２号公報に提示されている
。 In recent years, a brushless motor-integrated pump that can realize high efficiency and high durability and has a structure that shares a rotating shaft by integrating a gear pump with a brushless motor to pump the working medium of the waste heat recovery system And JP-A-2006-101042.

このブラシレスモーター一体型ポンプは、ブラシレスモーターの回転軸に軸着されたロ
ーターと、前記ローターの周囲に配置されたステータが、ケース体の一部を構成するモーターケース内に収容されているとともに前記モーターケースの開口部に前記回転軸を貫通
・突出させたモーターカバーが被蓋されており、前記モーターカバーの表面に設置されて前記モーターケースとともにケース体を構成するポンプカバー内に前記ブラシレスモータ
ーの回転軸を共用する歯車ポンプが収装されていて前記ポンプカバーに設けた吸入口から導入した作動媒体を前記モーターカバーに形成した歯車ポンプの吐出口である接続口を介して前記モーターケース内に導入した後に前記モーターカバーに形成した吐出口から流出させるものである。 This brushless motor-integrated pump has a rotor mounted on a rotating shaft of a brushless motor, and a stator disposed around the rotor, which is housed in a motor case forming a part of a case body, and A motor cover having the rotating shaft penetrated and protruded from the opening of the motor case is covered, and the brushless motor is disposed in a pump cover which is installed on the surface of the motor cover and forms a case body together with the motor case. A gear pump sharing a rotating shaft is housed therein, and the working medium introduced from a suction port provided in the pump cover is introduced into the motor case via a connection port which is a discharge port of the gear pump formed in the motor cover. After being introduced, it flows out from a discharge port formed in the motor cover.

ところで、従来から例えば１つの回転ポンプでは所望の高圧側作動媒体を得られない場合や例えばスリップ防止のブレーキ装置のように低圧作動媒体と高圧作動媒体の２系統の圧力源を必要とする場合があり、これらの場合に２個の歯車ポンプを１つの回転軸を共有させて回転軸方向に並べて構成した低圧と高圧の異なる圧力の作動媒体を吐出する２系統の歯車ポンプを備えたものが例えば特開２０００−１６１２４３号公報、特表２０１４−５１０８６４号公報に提示されている。   By the way, conventionally, for example, a case in which a desired high-pressure side working medium cannot be obtained by one rotary pump, or a case in which two pressure sources of a low-pressure working medium and a high-pressure working medium are required as in a brake device for preventing slip, for example. In these cases, for example, two gear pumps that share a single rotating shaft and are arranged side by side in the rotating shaft direction and have two systems of gear pumps that discharge working media at different pressures of low pressure and high pressure are provided, for example. It is presented in JP-A-2000-161243 and JP-T-2014-510864.

そこで、これらの２系統の歯車ポンプにも前記ブラシレスモーター一体型ポンプを適用することが考えられる。   Therefore, it is conceivable to apply the brushless motor-integrated pump to these two systems of gear pumps.

しかしながら、前記特開２０００−１６１２４３号公報に提示されている多段式の歯車ポンプは２系統の歯車ポンプが互いに隔離された状態であり、低圧と高圧の２系統の歯車ポンプからの吐出口を個別にブラシレスモーターへ流入させる必要があり互いに遮断されている個々の歯車ポンプについて１つのブラシレスモーターと一体的に構成することはきわめて困難である。また、例えば低圧側歯車ポンプはそのまま作動媒体として使用し、高圧側歯車ポンプをモーターと一体化した場合には例えば低圧側歯車ポンプからの作動媒体を使用する場合にも高圧側歯車ポンプを常に所定の回転速度で駆動しないとモーターが冷却されず、経済的でない。勿論、最高圧は高圧側歯車ポンプに委ねられるという問題がある。   However, the multi-stage gear pump disclosed in JP-A-2000-161243 has a state in which two systems of gear pumps are isolated from each other, and the discharge ports from the two systems of low-pressure and high-pressure gear pumps are individually provided. It is very difficult to integrate the individual gear pumps which need to flow into the brushless motor and are isolated from one another in one piece with one brushless motor. In addition, for example, when the low-pressure side gear pump is used as the working medium as it is, and when the high-pressure side gear pump is integrated with the motor, for example, when the working medium from the low-pressure side gear pump is used, the high-pressure side gear pump is always used as a predetermined medium. If the motor is not driven at the rotation speed, the motor is not cooled, which is not economical. Of course, there is a problem that the highest pressure is left to the high-pressure side gear pump.

一方、特表２０１４−５１０８６４号公報に提示されている歯車ポンプでは、２系統の歯車ポンプは低圧側歯車ポンプの吐出口が高圧ポンプの吸入口と連結されているのでこれらの２系統の歯車ポンプに前記ブラシレスモーター一体型ポンプを適用することは容易である。また、２系統の歯車ポンプを加えた高圧の作動媒体を得ることができる反面低圧の作動媒体を必要とする場合には高圧の吐出口から流出された高圧の作動媒体を減圧して使用することになり経済的な損失がある。   On the other hand, in the gear pump disclosed in Japanese Patent Application Publication No. 2014-510864, since the discharge port of the low-pressure side gear pump is connected to the suction port of the high-pressure pump, the two-system gear pump is used. It is easy to apply the brushless motor integrated pump to the above. In addition, when a high-pressure working medium with two gear pumps can be obtained, if a low-pressure working medium is required, the high-pressure working medium flowing out of the high-pressure discharge port should be used under reduced pressure. And there is an economic loss.

特開２０１６−１０１０４２号公報JP-A-2006-101042 特開２０００−１６１２４３号公報JP-A-2000-161243 特表２０１４−５１０８６４号公報JP 2014-510864 A

本発明は歯車ポンプと回転軸を共用し、前記歯車ポンプへ駆動力を付加するためのモーターとを一体に有するブラシレスモーター一体型ポンプに関し、特に、歯車ポンプとして２系統の回転ポンプを備えたブラシレスモーターに歯車ポンプを一体化して回転軸を共用する小型で冷却能力に優れたブラシレスモーター一体型ポンプにおいて、前記歯車ポンプとして２系統の歯車ポンプを用いて高効率・高耐久性であるとともに、殊に、低圧側作動媒体および高圧側作動媒体の少なくとも一方を選択して使用することができるブラシレスモーター体型ポンプを提供することを課題とする。   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless motor-integrated pump that shares a rotating shaft with a gear pump and integrally has a motor for applying a driving force to the gear pump. A brushless motor-integrated pump that is excellent in cooling performance and is small in size and has a high cooling capacity, in which a gear pump is integrated with a motor and uses a rotating shaft. Another object of the present invention is to provide a brushless motor-type pump that can select and use at least one of a low-pressure side working medium and a high-pressure side working medium.

前記課題を解決するためになされた本発明であるブラシレスモーター一体型歯車ポンプは、ブラシレスモーターの回転軸に軸着されたローターと、前記ローターの周囲に配置されたステータが、ケース体の一部を構成するモーターケース内に収容されているとともに前記モーターケースの開口部に前記回転軸を貫通・突出させたモーターカバーが被蓋されており、前記モーターカバーの表面に設置されて前記モーターケースとともにケース体を構成するポンプカバー内に前記ブラシレスモーターの回転軸を駆動源として共用する低圧側歯車ポンプと高圧側歯車ポンプが多段式に収装されており、前記低圧側歯車ポンプにおける加圧空間に形成された低圧側吐出口と高圧側歯車ポンプにおける加圧空間の高圧側吸入口が連通されていて前記ポンプカバーに設けた前記低圧側吸入口から導入した作動媒体を前記低圧側歯車ポンプと高圧側歯車ポンプの順に流入させて加圧して前記モーターカバ
ーに形成した前記高圧側歯車ポンプの高圧側吐出口である接続口を介して前記モーターケ
ース内に導入した後に前記モーターケースに形成したケース体吐出口から流出させるとともに、前記低圧側歯車ポンプの加圧空間から吐出される低圧側作動媒体の低圧側吐出口または前記高圧側歯車ポンプの高圧側吸入口に連通して前記ポンプカバーに形成した低圧側歯車ポンプの低圧側吐出口から流出される低圧側作動媒体の低圧流出路と、前記モーターケースに形成したケース体吐出口から流出させる前記高圧側歯車ポンプの加圧空間から吐出される高圧側作動媒体の高圧流出路が配置されているとともに前記低圧流出路と高圧流出路とが前記低圧流出路側に開弁する逆止弁を備えた連結通路により連通されていることを特徴とする。 A brushless motor-integrated gear pump according to the present invention made to solve the above-mentioned problem has a rotor that is mounted on a rotating shaft of the brushless motor, and a stator that is arranged around the rotor, and a part of a case body. A motor cover that is housed in the motor case and that has the rotating shaft penetrated and protrudes from the opening of the motor case is covered, and is installed on the surface of the motor cover together with the motor case. A low-pressure side gear pump and a high-pressure side gear pump that share the rotation axis of the brushless motor as a drive source are housed in a multistage manner in a pump cover constituting a case body, and are provided in a pressurized space in the low-pressure side gear pump. The formed low pressure side discharge port communicates with the high pressure side suction port of the pressurization space of the high pressure side gear pump, The working medium introduced from the low-pressure side suction port provided in the cover is caused to flow in the order of the low-pressure side gear pump and the high-pressure side gear pump, pressurized, and then pressurized at the high-pressure side discharge port of the high-pressure side gear pump formed in the motor cover. After being introduced into the motor case through a certain connection port, it is discharged from a case body discharge port formed in the motor case, and the low-pressure side discharge of the low-pressure side working medium discharged from the pressurized space of the low-pressure side gear pump. A low-pressure outflow passage for a low-pressure side working medium flowing out from a low-pressure side discharge port of the low-pressure side gear pump formed in the pump cover in communication with an outlet or a high-pressure side suction port of the high-pressure side gear pump; and formed in the motor case. And a high-pressure outflow passage for the high-pressure side working medium discharged from the pressurized space of the high-pressure side gear pump, which flows out from the case body discharge port. Wherein and a low pressure outlet passage and the high pressure outlet passage, characterized in that are communicated by the connecting passage having a check valve which is opened to said low pressure outlet roadside on.

また、本発明において、前記連結通路に備えられている逆止弁が電磁弁であることで所望圧力の作動媒体を確実に得ることができる。   Further, in the present invention, since the check valve provided in the connection passage is an electromagnetic valve, a working medium having a desired pressure can be reliably obtained.

更に、前記低圧側歯車ポンプの流量が前記高圧側歯車ポンプの流量よりも小さくすることにより回転軸を共有しても低圧および高圧の作動媒体をそれぞれ取得することができる
。 Further, by setting the flow rate of the low-pressure side gear pump to be smaller than the flow rate of the high-pressure side gear pump, it is possible to obtain low-pressure and high-pressure working media even if the rotating shaft is shared.

本発明によれば、２系統の歯車ポンプと回転軸を共用して前記歯車ポンプへ駆動力を付加するためのモーターとを一体に有するブラシレスモーター一体型ポンプにおいて、高効率・高耐久性であるとともに、殊に、低圧側作動媒体および高圧側作動媒体の少なくとも一方を選択して使用することができる。   According to the present invention, a brushless motor-integrated pump integrally having a two-system gear pump and a motor for adding a driving force to the gear pump by sharing a rotating shaft with the gear pump has high efficiency and high durability. In addition, at least one of the low-pressure side working medium and the high-pressure side working medium can be selected and used.

本発明における好ましい実施の形態におけるブラシレスモーター一体型ポンプの縦断面図および作動媒体の流路を示す説明図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical cross-sectional view of a brushless motor-integrated pump according to a preferred embodiment of the present invention and an explanatory diagram showing a flow path of a working medium. 図１における高圧側歯車ポンプの概要を示す説明図。Explanatory drawing which shows the outline of the high pressure side gear pump in FIG. 同一回転速度で回転する高圧側ポンプの流量と低圧側ポンプの流量とから両ポンプのシステム要求流量範囲を求める関係図。FIG. 4 is a relationship diagram for obtaining a system required flow rate range of both pumps from a flow rate of a high-pressure side pump and a flow rate of a low-pressure side pump rotating at the same rotation speed. 図３に示したシステム要求流量範囲から求めた流量、高圧側および低圧側の歯車ポンプについてのポンプ回転数と流量との関係図であり、高圧側歯車ポンプおよび低圧側歯車ポンプの流量の組み合わせを設定する。FIG. 4 is a diagram showing a relationship between a flow rate obtained from the system required flow rate range shown in FIG. 3 and a pump rotation speed and a flow rate of a high-pressure side and a low-pressure side gear pump. Set. 歯車ポンプにおける理想流量とポンプ実測値とにおけるポンプ回転数と流量との関係図。FIG. 4 is a diagram illustrating a relationship between a pump rotation speed and a flow rate between an ideal flow rate and a measured pump value in a gear pump.

以下に、本発明の好ましい実施の形態について図面を参照して詳細に説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

図１および図２は本発明の好ましい実施の形態におけるブラシレスモーター一体型ポンプを示すものであり、ポンプカバー２、モーターカバー３、モーターケース４からなるケ
ース体１内に前記ポンプカバー２に設けられたカバー体吸入口２１から作動媒体１０を導入し、前記モーターカバー３に設けられた接続口３１を経由して前記モーターケース４に設けられたケース体吐出口４１へ前記作動媒体１０を流通させるための前記ポンプカバー２内に収装された低圧側歯車ポンプ５ａと高圧側歯車ポンプ５ｂとの２系統の歯車ポンプの回転軸６を共用する直流のブラシレスモーター７を有し、前記モーターカバー３と前記モーターケース４の間に設置され前記接続口３１と接続される整流部材８を有し、前記ケ
ース体１外に前記ブラシレスモーター７の回転数を制御するための制御装置９を配置している。 1 and 2 show a brushless motor-integrated pump according to a preferred embodiment of the present invention. The pump is provided in a pump body 2 in a case body 1 including a pump cover 2, a motor cover 3, and a motor case 4. The working medium 10 is introduced from the cover body suction port 21, and the working medium 10 is circulated to the case body discharge port 41 provided in the motor case 4 via the connection port 31 provided in the motor cover 3. A DC brushless motor 7 sharing a rotating shaft 6 of a two-system gear pump of a low-pressure gear pump 5a and a high-pressure gear pump 5b housed in the pump cover 2 for the motor cover 3 And a rectifying member 8 installed between the motor case 4 and the connection port 31. It is arranged a control device 9 for controlling the rotational speed of the coater 7.

そして、前記ブラシレスモーター７は、ステータ７１とローター７２、およびブッシュ６１に支持された前記回転軸６から構成され、前記ステータ７１はステータコア７１１およびコイル７１２からなり、前記ステータコア７１１の切欠部７１３に巻き付けられた前記コイル７１２の外側の空間は、前記作動媒体１０が通過する作動媒体通路７１４となる
。 The brushless motor 7 includes a stator 71, a rotor 72, and the rotating shaft 6 supported by a bush 61. The stator 71 includes a stator core 711 and a coil 712, and is wound around a notch 713 of the stator core 711. The space outside the coil 712 is a working medium passage 714 through which the working medium 10 passes.

また、前記ステータコア７１１の端面の少なくとも一部が前記モーターケース１の外周面と段差部４２の隙間を通過しない構造となっているか、もしくは通過しても前記作動媒体通路７１４を通過する流量と比較し少量となっている。   In addition, at least a part of the end face of the stator core 711 does not pass through the gap between the outer peripheral face of the motor case 1 and the stepped portion 42, or even if it passes, the flow rate passes through the working medium passage 714. Then it is small.

また、前記ローター７２は前記回転軸６に軸着された略円筒形状のローターコア７２１と、前記ローターコア７２１に嵌着されたマグネット７２２とからなる。   Further, the rotor 72 includes a substantially cylindrical rotor core 721 that is axially attached to the rotating shaft 6, and a magnet 722 that is fitted to the rotor core 721.

尚、前記ローターコア７２１は、軸方向の両端面を貫通する複数の貫通孔（図示せず）が軸対称に設けられていると、軽量化・省費用化が望めるため特に好ましい。   The rotor core 721 is particularly preferably provided with a plurality of axially symmetrical through holes (not shown) penetrating through both end faces in the axial direction, because weight and cost savings can be expected.

また、本実施の形態におけるブラシレスモーター一体型ポンプは、液密に構成された前記ケース体１外に前記ブラシレスモーター７のステータ７１のコイル７１２に電流を供給する電源（図示せず）および前記ブラシレスモーター７のローター７２の回転数を制御するための前記制御装置９が配置されているため、前記ケース体１内を満たす前記作動媒体１０に液没して各部品が破損するなどの故障を回避することができる。   Further, the brushless motor-integrated pump according to the present embodiment includes a power source (not shown) for supplying a current to the coil 712 of the stator 71 of the brushless motor 7 outside the case body 1 which is liquid-tight and the brushless motor. Since the control device 9 for controlling the number of rotations of the rotor 72 of the motor 7 is arranged, it is possible to avoid a failure such as immersion in the working medium 10 filling the case body 1 and breakage of each part. can do.

一方、前記ポンプカバー２内に収装された低圧側と高圧側との２系統の歯車ポンプ５ａ
，５ｂは、例えば図２に示したように従来の内接歯車ポンプを前記ブラシレスモーター７のモーターカバー３の頂面に突出させた回転軸６を共用してその軸線方向に沿って多段式に収装したものであり、各歯車ポンプ５ａ（５ｂ）は前記回転軸６に軸着された内歯車５
１ａ（５１ｂ）とその周囲に配置されたアウターベアリング５２ａ（５２ｂ）に内接される外歯車５３ａ（５３ｂ）とが一部において噛合状態で設置されるとともに内歯車５１ａ（５１ｂ）と外歯車５３ａ（５３ｂ）との間に高低圧仕切り用の三日月形のクレセントシ
ール５４ａ（５４ｂ）が配置されており、低圧側吸入口５５ａ，高圧側吸入口５５ｂから吸入された作動媒体１０が前記クレセントシール５４ａ（５４ｂ）を挟んで形成される内歯車５１ａ（５１ｂ）と外歯車５３ａ（５３ｂ）との間に形成される吸入側空間５６ａ（
５６ｂ）から加圧空間５７ａ（５７ｂ）に移動して加圧され、加圧空間５７ａ（５７ｂ）に形成された低圧側吐出口５８ａ、高圧側吐出口５８ｂから吐出されるものである。 On the other hand, two systems of a gear pump 5a of low pressure side and high pressure side accommodated in the pump cover 2
, 5b share a rotary shaft 6 in which a conventional internal gear pump projects from the top surface of the motor cover 3 of the brushless motor 7 as shown in FIG. Each of the gear pumps 5a (5b) has an internal gear 5 mounted on the rotary shaft 6.
1a (51b) and an external gear 53a (53b) inscribed in an outer bearing 52a (52b) disposed therearound are partially installed in a meshing state, and the internal gear 51a (51b) and the external gear 53a (53b), a crescent-shaped crescent seal 54a (54b) for high / low pressure partitioning is arranged, and the working medium 10 sucked from the low pressure side suction port 55a and the high pressure side suction port 55b is filled with the crescent seal 54a. (54b) and a suction-side space 56a (formed between the internal gear 51a (51b) and the external gear 53a (53b)).
56b) to the pressurizing space 57a (57b) to be pressurized and discharged from the low-pressure side discharge port 58a and the high-pressure side discharge port 58b formed in the pressurized space 57a (57b).

殊に、本実施の形態では低圧側歯車ポンプ５ａと高圧側歯車ポンプ５ｂを軸方向に向けて多段式に形成したものであり、前記低圧側歯車ポンプ５ａの低圧側吐出口５８ａと高圧側歯車ポンプ５ｂの高圧側吸入口５５ｂとが連通されている。   In particular, in the present embodiment, the low-pressure side gear pump 5a and the high-pressure side gear pump 5b are formed in a multistage manner in the axial direction, and the low-pressure side discharge port 58a and the high-pressure side gear of the low-pressure side gear pump 5a are formed. The high pressure side suction port 55b of the pump 5b is in communication.

また、低圧側歯車ポンプ５ａの流量が高圧側歯車ポンプ５ｂの流量よりも小さいものとなっている。この点について本実施の形態では低圧側歯車ポンプ５ａの流量が高圧側歯車ポンプ５ｂと共通の回転軸６を用いているので相互に回転数を変化させることが困難であることから、例えば内歯車５１ａ（５１ｂ）の径を相互に変えて加圧空間の容積を変化させることなどで対処することができる。   The flow rate of the low-pressure side gear pump 5a is smaller than the flow rate of the high-pressure side gear pump 5b. In this regard, in this embodiment, since the flow rate of the low-pressure side gear pump 5a uses the common rotating shaft 6 with the high-pressure side gear pump 5b, it is difficult to change the rotation speed mutually. This can be dealt with by changing the diameter of the pressurized space by changing the diameters of the 51a (51b).

尚、本実施の形態は異なる流量低圧側歯車ポンプ５ａと高圧側歯車ポンプ５ｂを共通の回転軸６により駆動するものであることから同一回転速度になることから、システム要求流量はそれぞれのポンプ５ａ，５ｂの吐出流量から設定する必要がある。   In this embodiment, since different flow rate low-pressure side gear pumps 5a and high pressure side gear pumps 5b are driven by the common rotating shaft 6, they have the same rotation speed. , 5b.

図３は高圧側歯車ポンプ５ｂの流量ＱＨと低圧側歯車ポンプ５ａの流量ＱＬとの関係から高圧側歯車ポンプ５ｂのシステム要求流量範囲を示すものであり、また、図４は前記図３に示したシステム要求範囲における高圧側歯車ポンプの流量ＱＨと低圧側歯車ポンプの流量ＱＬの和（ＱＨ＋ＱＬ）および低圧側歯車ポンプ５ａおよび高圧側歯車ポンプ５ｂについてのポンプの回転数と流量との関係を示すものであり、例えば図３に示した高圧側歯車ポンプ５ｂの流量ＱＨがａであってシステム要求流量（前記高圧側歯車ポンプの流量ＱＨと低圧側歯車ポンプの流量ＱＬの和（ＱＨ＋ＱＬ））におけるＡ点における交点から低圧側ポンプ５ｂの流量を決定することになる。   FIG. 3 shows the system required flow range of the high-pressure gear pump 5b based on the relationship between the flow rate QH of the high-pressure gear pump 5b and the flow rate QL of the low-pressure gear pump 5a, and FIG. (QH + QL) of the flow rate QH of the high-pressure side gear pump and the flow rate QL of the low-pressure side gear pump in the required range of the system, and the relationship between the pump speed and the flow rate of the low-pressure side gear pump 5a and the high-pressure side gear pump 5b. For example, the flow rate QH of the high-pressure side gear pump 5b shown in FIG. 3 is a and the system required flow rate (the sum (QH + QL) of the flow rate QH of the high-pressure side gear pump and the flow rate QL of the low-pressure side gear pump) The flow rate of the low-pressure side pump 5b is determined from the intersection at the point A.

尚、歯車ポンプにおける理想流量とポンプ実測値とにおけるポンプ回転数と流量との関係図からわかるように、実際の歯車ポンプでは内部漏れがあるのでその分を考慮して決定する。   As can be seen from the relationship diagram between the pump rotation speed and the flow rate between the ideal flow rate and the actual measured value of the gear pump, an actual gear pump has an internal leak.

また、本実施の形態では、連通している前記低圧側歯車ポンプ５ａの低圧側吐出口５８ａと前記高圧側歯車ポンプ５ｂの高圧側吸入口５５ｂ間に更に連通して前記ポンプカバー２に形成されたカバー体吐出口２２から低圧側作動媒体１０ａを流出させる低圧流出路１
１と、前記モーターケース４に形成したケース体吐出口４１から高圧側作動媒体１０ｂを流出させる高圧流出路１２が配置されているとともに前記低圧流出路１１と高圧流出路１
２とが前記低圧流出路１１側に開弁する逆止弁１３を備えた連結通路１４により連通されている。 Further, in the present embodiment, the pump cover 2 is further formed to communicate between the low pressure side discharge port 58a of the low pressure side gear pump 5a and the high pressure side suction port 55b of the high pressure side gear pump 5b. -Pressure outflow passage 1 for allowing low-pressure side working medium 10a to flow out of covered cover discharge port 22
1 and a high-pressure outflow passage 12 for discharging the high-pressure side working medium 10b from a case body discharge port 41 formed in the motor case 4, and the low-pressure outflow passage 11 and the high-pressure outflow passage 1
2 is connected to a connection passage 14 having a check valve 13 that opens to the low-pressure outflow passage 11 side.

以上の構成を有する本実施の形態は、図１および図２において、ブラシレスモーター７が駆動すると、回転軸６を共用する低圧側歯車ポンプ５ａおよび高圧側歯車ポンプ５ｂが同期して作動し、作動媒体１０がポンプカバー２に形成したカバー体吸入口２１から低圧側歯車ポンプ５ａの低圧側吸入口５５ａに生じる負圧によって内部に吸入され、内歯車５
１ａと外歯車５３ａとの噛合により加圧空間５７ａに送られて加圧されて低圧側作動媒体１０ａとして低圧側吐出口５８ａへ圧送される。 1 and 2, when the brushless motor 7 is driven, the low-pressure gear pump 5a and the high-pressure gear pump 5b that share the rotating shaft 6 operate in synchronization with each other, The medium 10 is sucked into the inside by the negative pressure generated in the low pressure side suction port 55a of the low pressure side gear pump 5a from the cover body suction port 21 formed in the pump cover 2, and the internal gear 5
1a and the external gear 53a are meshed with each other to be sent to the pressurizing space 57a, pressurized, and sent to the low-pressure discharge port 58a as the low-pressure working medium 10a.

そして、前記低圧歯車ポンプ５ａの低圧側吐出口５８ａはブラシレスモーター７側に配置された高圧側歯車ポンプ５ｂの高圧側吸入口５５ｂに連結されており、前記低圧側歯車ポンプ５ａの低圧側吐出口５８ａから圧送された低圧側作動媒体１０ａが高圧側歯車ポンプ５ｂの高圧側吸入口５５ｂから内部に吸入されて前記低圧歯車ポンプ５ａと同様に更に加圧されて高圧側吐出口５８ｂへ圧送される。   The low pressure side discharge port 58a of the low pressure gear pump 5a is connected to the high pressure side suction port 55b of the high pressure side gear pump 5b arranged on the brushless motor 7 side, and the low pressure side discharge port of the low pressure side gear pump 5a. The low-pressure side working medium 10a pumped from the high pressure side gear pump 5b is sucked into the high pressure side suction port 55b of the high pressure side gear pump 5b, further pressurized similarly to the low pressure gear pump 5a, and fed to the high pressure side discharge port 58b. .

更に、高圧側歯車ポンプ５ｂの高圧側吐出口５８ｂはモーターカバー３とモーターケース４との間に設置された接続口３１に接続されており、前記低圧側歯車ポンプ５ｂの低圧側吐出口５８ｂから吐出された高圧側作動媒体１０ｂが接続口３１から整流部材８によって、ローター７２の回転方向と同一の方向に流れを調整されて、モーターケース４内部へ導入され、モーターケース４内部へ導入された高圧作動媒体１０ｂは、作動媒体通路７１
４（切欠部７１３）を通して回転するステータ７を冷却して熱交換を行い、モーターケース４に設けられたケース体吐出口４１から流出することとなり、前記コイル７１２の発熱を抑えるとともに軸受部の摩擦や高圧側作動媒体１０ｂから受ける圧力等の抗力による負荷を低減したことによる耐久性の向上を図ることができる。 Further, the high pressure side discharge port 58b of the high pressure side gear pump 5b is connected to the connection port 31 provided between the motor cover 3 and the motor case 4, and is connected to the low pressure side discharge port 58b of the low pressure side gear pump 5b. The flow of the discharged high-pressure side working medium 10 b is adjusted from the connection port 31 by the rectifying member 8 in the same direction as the rotation direction of the rotor 72, introduced into the motor case 4, and introduced into the motor case 4. The high-pressure working medium 10 b is
4 (notch portion 713) to cool the stator 7 to exchange heat and flow out from the case body discharge port 41 provided in the motor case 4, thereby suppressing heat generation of the coil 712 and friction of the bearing portion. The durability can be improved by reducing the load due to the drag such as the pressure received from the high-pressure side working medium 10b.

そして、本実施の形態では、前記ポンプカバー２に形成したカバー体吐出口２２から流出される低圧側作動媒体１０ａおよび前記モーターカバー４に形成したケース体吐出口４
１から流出される高圧側作動媒体１０ｂが前記低圧流出路１１および高圧流出路１２を介して従来と同様に従来周知のランキンサイクル等の廃熱回収システム（図示せず）へと送出されることとなり、１つの動力源で互いに異なる圧力の作動媒体を用いる２系統の圧力源を必要とする作動機構（図示せず）に対応することができるのでスペースの有効利用、省力化を図ることができる。 In the present embodiment, the low-pressure side working medium 10 a flowing out of the cover body discharge port 22 formed in the pump cover 2 and the case body discharge port 4 formed in the motor cover 4.
The high-pressure side working medium 10b flowing out of 1 is sent to a conventionally known waste heat recovery system (not shown) such as a Rankine cycle through the low-pressure outflow channel 11 and the high-pressure outflow channel 12 as in the conventional case. It is possible to cope with an operating mechanism (not shown) that requires two systems of pressure sources using working media of different pressures with one power source, so that effective use of space and labor saving can be achieved. .

更に、本実施の形態では２系統の内で高圧流出路１２からの高圧側作動媒体１０ｂは前記低圧側歯車ポンプ５ａと高圧側歯車ポンプ５ｂとに加圧された高圧のものが得られる。   Further, in the present embodiment, the high-pressure side working medium 10b from the high-pressure outflow passage 12 can be obtained as a high-pressure working medium pressurized by the low-pressure side gear pump 5a and the high-pressure side gear pump 5b.

更にまた、本実施の形態では２系統である低圧流出路１１と高圧流出路１２とが逆止弁１３を介して連結通路１４により連結されているので、逆止弁１３を開くことにより１つの動力源で２系統の低圧側作動媒体１０ｂの供給源として対応可能であり、逆止弁の開度を調節することで低圧流出路１１と高圧流出路１２を流れる低圧側作動媒体１０ａと高圧側作動媒体１０ｂの圧力を変化可能であり、所望の２系統作動媒体の供給源として利用することができる。   Furthermore, in the present embodiment, the two systems of the low-pressure outflow passage 11 and the high-pressure outflow passage 12 are connected by the connection passage 14 via the check valve 13. The power source can be used as a supply source for the two systems of the low-pressure side working medium 10b, and the low-pressure side working medium 10a flowing through the low-pressure outflow path 11 and the high-pressure outflow path 12 and the high-pressure side by adjusting the opening of the check valve. The pressure of the working medium 10b can be changed, and can be used as a supply source of a desired two-system working medium.

１ ケース体、２ ポンプカバー、３ モーターカバー、４ モーターケース、５ａ 低圧側歯車ポンプ、５ｂ 高圧側歯車ポンプ、６ 回転軸、７ ブラシレスモーター、８ 整流部材、９ 制御装置、１０ 作動媒体、１０ａ 低圧側作動媒体、１０ｂ 高圧側作動媒体、１１ 低圧流出路、１２ 高圧流出路、１３ 逆止弁、１４ 連結通路、２１ カバー体吸入口、２２ カバー体吐出口、３１ 接続口、４１ ケース体吐出口、５１ａ（５１ｂ） 内歯車、５２ａ（５２ｂ） アウターベアリング、５３ａ（５３ｂ） 外歯車、５４ａ（５４ｂ） クレセントシール、５５ａ 低圧側吸入口、５５ｂ 高圧側吸入口、５６ａ（５６ｂ） 吸入側空間、５７ａ（５７ｂ） 加圧空間、５８ａ 低圧側吐出口、５８ｂ 高圧側吐出口、６１ ブッシュ、７１ ステータ、７２ ローター、７１
１ ステータコア、７１２ コイル、７１３ 切欠部、７１４ 作動媒体通路、７２１ ローターコア、７２２ マグネット DESCRIPTION OF SYMBOLS 1 Case body, 2 pump cover, 3 motor cover, 4 motor case, 5a low pressure side gear pump, 5b high pressure side gear pump, 6 rotation shaft, 7 brushless motor, 8 rectifying member, 9 control device, 10 working medium, 10a low pressure Side working medium, 10b high pressure side working medium, 11 low pressure outflow channel, 12 high pressure outflow channel, 13 check valve, 14 connection passage, 21 cover body suction port, 22 cover body discharge port, 31 connection port, 41 case body discharge port 51a (51b) Internal gear, 52a (52b) Outer bearing, 53a (53b) External gear, 54a (54b) Crescent seal, 55a Low pressure side suction port, 55b High pressure side suction port, 56a (56b) Suction side space, 57a (57b) Pressurized space, 58a Low pressure side discharge port, 58b High pressure side discharge port, 61 bush, 71 stator, 72 rotor , 71
1 stator core, 712 coil, 713 notch, 714 working medium passage, 721 rotor core, 722 magnet

Claims (3)

ブラシレスモーターの回転軸に軸着されたローターと、前記ローターの周囲に配置されたステータが、ケース体の一部を構成するモーターケース内に収容されているとともに前記モーターケースの開口部に前記回転軸を貫通・突出させたモーターカバーが被蓋されており、前記モーターカバーの表面に設置されて前記モーターケースとともにケース体を構成するポンプカバー内に前記ブラシレスモーターの回転軸を駆動源として共用する低圧側歯車ポンプと高圧側歯車ポンプが多段式に収装されており、前記低圧側歯車ポンプにおける加圧空間に形成された低圧側吐出口と高圧側歯車ポンプにおける加圧空間の高圧側吸入口が連通されていて前記ポンプカバーに設けた前記低圧側吸入口から導入した作動媒体を前記低圧側歯車ポンプと高圧側歯車ポンプの順に流入させて加圧して前記モーターカバーに形成した前記高圧側歯車ポンプの高圧側吐出口である接続口を介して前記モーターケース内に導入した後に前記モーターケースに形成したケース体吐出口から流出させるとともに、
前記低圧側歯車ポンプの加圧空間から吐出される低圧側作動媒体の低圧側吐出口または前記高圧側歯車ポンプの高圧側吸入口に連通して前記ポンプカバーに形成した低圧側歯車ポンプの低圧側吐出口から流出される低圧側作動媒体の低圧流出路と、前記モーターケースに形成したケース体吐出口から流出させる前記高圧側歯車ポンプの加圧空間から吐出される高圧側作動媒体の高圧流出路が配置されているとともに前記低圧流出路と高圧流出路とが前記低圧流出路側に開弁する逆止弁を備えた連結通路により連通されていることを特徴とするブラシレスモーター一体型ポンプ。 A rotor fixed to a rotating shaft of a brushless motor and a stator disposed around the rotor are housed in a motor case forming a part of a case body, and the rotation is performed at an opening of the motor case. A motor cover having a shaft penetrating and projecting is covered, and the rotary shaft of the brushless motor is shared as a drive source in a pump cover which is installed on the surface of the motor cover and forms a case body together with the motor case. A low-pressure side gear pump and a high-pressure side gear pump are housed in a multistage manner, and a low-pressure side discharge port formed in a pressurization space of the low-pressure side gear pump and a high-pressure side suction port of a pressurization space in the high-pressure side gear pump. The working medium introduced from the low pressure side suction port provided on the pump cover is communicated with the low pressure side gear pump and the high pressure side. A case body discharge formed in the motor case after being introduced into the motor case through a connection port which is a high pressure side discharge port of the high pressure side gear pump formed in the motor cover by flowing in the order of a car pump and pressurizing the motor cover. Let out from the exit,
The low pressure side of the low pressure side gear pump formed in the pump cover in communication with the low pressure side discharge port of the low pressure side working medium discharged from the pressurized space of the low pressure side gear pump or the high pressure side suction port of the high pressure side gear pump. A low-pressure outflow passage for the low-pressure side working medium flowing out from the discharge port, and a high-pressure outflow passage for the high-pressure side working medium discharged from the pressurized space of the high-pressure side gear pump flowing out from the case body discharge port formed in the motor case. Wherein the low-pressure outflow passage and the high-pressure outflow passage are connected by a connection passage provided with a check valve that opens to the low-pressure outflow passage side. 前記連結通路に備えられている逆止弁が電磁弁であることを特徴とする請求項１記載のブラシレスモーター一体型ポンプ。   The brushless motor-integrated pump according to claim 1, wherein the check valve provided in the connection passage is an electromagnetic valve. 前記低圧側歯車ポンプの流量が前記高圧側歯車ポンプの流量よりも小さいことを特徴とする請求項１または２記載のブラシレスモーター一体型ポンプ。   3. The brushless motor-integrated pump according to claim 1, wherein a flow rate of the low-pressure side gear pump is smaller than a flow rate of the high-pressure side gear pump.
JP2018177937A 2018-09-21 2018-09-21 Brushless motor integrated pump Pending JP2020051256A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018177937A JP2020051256A (en) 2018-09-21 2018-09-21 Brushless motor integrated pump
US16/578,263 US20200095997A1 (en) 2018-09-21 2019-09-20 Brushless motor integrated pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018177937A JP2020051256A (en) 2018-09-21 2018-09-21 Brushless motor integrated pump

Publications (1)

Publication Number Publication Date
JP2020051256A true JP2020051256A (en) 2020-04-02

Family

ID=69884200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018177937A Pending JP2020051256A (en) 2018-09-21 2018-09-21 Brushless motor integrated pump

Country Status (2)

Country Link
US (1) US20200095997A1 (en)
JP (1) JP2020051256A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK177834B1 (en) * 2013-02-27 2014-09-08 C C Jensen As Device for processing a liquid under vacuum pressure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61160590A (en) * 1985-01-04 1986-07-21 ローベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Device for carrying fuel to internal combustion engine from fuel tank
JPH07247964A (en) * 1994-03-09 1995-09-26 Matsushita Electric Ind Co Ltd Solution pump for suction type heat pump
JP2006003766A (en) * 2004-06-21 2006-01-05 Noritsu Koki Co Ltd Recording media breakage prevention method for a digital image receiving device
JP2015135123A (en) * 2012-03-29 2015-07-27 ジヤトコ株式会社 Oil supply device and oil supply method
JP2016101042A (en) * 2014-11-25 2016-05-30 株式会社ニッキ Brushless motor integrated pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61160590A (en) * 1985-01-04 1986-07-21 ローベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Device for carrying fuel to internal combustion engine from fuel tank
JPH07247964A (en) * 1994-03-09 1995-09-26 Matsushita Electric Ind Co Ltd Solution pump for suction type heat pump
JP2006003766A (en) * 2004-06-21 2006-01-05 Noritsu Koki Co Ltd Recording media breakage prevention method for a digital image receiving device
JP2015135123A (en) * 2012-03-29 2015-07-27 ジヤトコ株式会社 Oil supply device and oil supply method
JP2016101042A (en) * 2014-11-25 2016-05-30 株式会社ニッキ Brushless motor integrated pump

Also Published As

Publication number Publication date
US20200095997A1 (en) 2020-03-26

Similar Documents

Publication Publication Date Title
JP3874300B2 (en) Vane pump
US20110001370A1 (en) Electric motor integrated hydraulic motor
JP6059465B2 (en) Electric dual pump
JP2008087713A (en) In-wheel motor structure
JP6442250B2 (en) Brushless motor integrated pump
US10030656B2 (en) Variable displacement vane pump with integrated fail safe function
CN103228918B (en) Two outlet pump
WO2011135747A1 (en) Vane pump
CN106870359A (en) Pump with adjustable delivery volume
JP4973167B2 (en) Coil cooling device
CA2712550A1 (en) Variable-volume internal gear pump
US20180216614A1 (en) Screw pump
JP2011149334A (en) Hydraulic control device for vehicle
EP2034187B1 (en) Scroll compressor
JP2020051256A (en) Brushless motor integrated pump
US20070274848A1 (en) Motor-pump assembly
US11990819B2 (en) Electric and hydraulic machine
JP2015068181A (en) Electric pump
JP2019011745A (en) Electric oil pump
US7682136B2 (en) Multiple pump housing
US20160369796A1 (en) Integrated Motor-Pump
JP2004116358A (en) Oil pump for automatic transmission
US8403625B2 (en) Pitot tube pump
KR102544769B1 (en) Motor driven compressor apparatus
JP4882466B2 (en) Electric pump

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210823

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20220721

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220803

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20230214