WO2022160549A1 - Permanent-magnetic variable-frequency constant-pressure self-priming pump - Google Patents

Permanent-magnetic variable-frequency constant-pressure self-priming pump Download PDF

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Publication number
WO2022160549A1
WO2022160549A1 PCT/CN2021/098862 CN2021098862W WO2022160549A1 WO 2022160549 A1 WO2022160549 A1 WO 2022160549A1 CN 2021098862 W CN2021098862 W CN 2021098862W WO 2022160549 A1 WO2022160549 A1 WO 2022160549A1
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WIPO (PCT)
Prior art keywords
water
permanent magnet
pump head
pump
cavity
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PCT/CN2021/098862
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French (fr)
Chinese (zh)
Inventor
杨学良
陈浩
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浙江西菱股份有限公司
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Publication of WO2022160549A1 publication Critical patent/WO2022160549A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—Mechanical details of the pump control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps

Definitions

  • the invention relates to a self-priming pump, in particular to a permanent magnet variable-frequency constant-pressure self-priming pump.
  • the self-priming pumps on the market have the problems that the water flow switch is easily blocked, stuck, has a low lifespan, unstable water outlet pressure, and a low degree of intelligence.
  • the invention discloses a permanent magnet variable frequency constant pressure self-priming pump, which solves the problems mentioned in the background art.
  • the permanent magnet variable frequency constant pressure self-priming pump includes a permanent magnet brushless motor, a water pump and an intelligent control system.
  • the inner end of the lower part of the pump head is connected to the output end of the permanent magnet brushless motor, and the outer end is connected with a pressure tank.
  • the pressure tank is communicated with the water outlet;
  • the intelligent control system includes a wire cover box arranged on the permanent magnet brushless motor, an intelligent drive board arranged in the wire cover box, and a liquid crystal touch screen arranged on the top of the wire cover box, and the intelligent drive board It is electrically connected to the permanent magnet brushless motor and the liquid crystal touch screen through the power cord.
  • the pump head is also provided with a water pressure sensor extending into the pump head. The water pressure sensor is electrically connected to the intelligent drive board through the power cord to feedback the water pressure. .
  • the pump head includes a water inlet cavity and a water outlet cavity located on the upper side of the pump head, and a booster cavity located on the lower side of the pump head.
  • the water inlet cavity and the water outlet cavity are respectively connected with the booster cavity.
  • the intelligent drive board is connected to the power supply through a power cord, and a fuse is provided at the power input of the intelligent drive board.
  • An installation hole is arranged on the top of the wire cover box, the LCD touch screen is installed on the inner wall of the top of the wire cover box, and an acrylic cover plate is arranged at the installation hole to completely cover the installation hole.
  • a temperature sensor is also arranged in the pump head and a heating device is also arranged at the position of the pump head. Both the temperature sensor and the heating device are electrically connected with the intelligent driving board.
  • This product adopts permanent magnet brushless high-speed and high-efficiency motor, imported chip, high-precision pressure sensor, water control switch, combined with advanced electronic control technology to realize intelligent frequency conversion, constant voltage speed regulation, and has the advantages of energy saving and high efficiency; in addition, the working range of this pump is Wide, high lift, large flow, suitable for operation in multiple working conditions, small size, light weight, beautiful appearance, easy to use, can be installed horizontally or at a 90° angle; the control panel is easy to set and operate, and no professional debugging is required; The water pressure feedback is realized by the pressure sensor, and the start and stop are controlled by the intelligent drive board control, so as to avoid the machine jam and prolong the service life.
  • FIG. 1 is a perspective view of the present invention.
  • Figure 2 is a perspective view of the present invention (with the top casing of the wire cover box removed).
  • the permanent magnet variable frequency constant pressure self-priming pump includes a permanent magnet brushless motor 1, a water pump 2 and an intelligent control system.
  • the inner end of the lower part of the pump head 21 of the water pump 2 is connected to the permanent magnet
  • the output end of the brush motor 1 is connected to a pressure tank 22 at the outer end, and the pressure tank 22 is communicated with the water outlet chamber;
  • the intelligent control system includes a wire cover box 3 arranged on the permanent magnet brushless motor 1, and a
  • the intelligent drive board 33 and the liquid crystal touch screen 32 arranged on the top of the wire cover box 3 are electrically connected with the permanent magnet brushless motor 1 and the liquid crystal touch screen 32 through the power cord.
  • the pump head 21 is also provided with an extension.
  • the water pressure sensor 34 is inserted into the pump head 21, and the water pressure sensor 34 is electrically connected to the intelligent driving board 33 through the power cable to feedback the water pressure.
  • the pump head 21 includes a water inlet cavity and a water outlet cavity located on the upper side of the pump head 21, and a booster cavity located on the lower side of the pump head 21.
  • the water inlet cavity and the water outlet cavity are respectively connected with the booster cavity.
  • a water inlet 211 and a water outlet 212 are respectively provided on the cavity wall.
  • the top of the pump head 21 is provided with a water injection hole, and the water injection hole is provided with a water injection bolt 23, and the water injection hole is located on one side of the water outlet cavity.
  • the top of the pump head 21 is provided with a water flow switch 2121 , and the water flow switch 2121 is located at the water outlet 212 .
  • the intelligent driving board 33 is connected to the power supply through a power cable, and a fuse is provided at the power input of the intelligent driving board 33 .
  • the top of the cable cover box 3 is provided with a mounting hole, the liquid crystal touch screen 32 is mounted on the inner wall of the top of the cable cover box 3 , and an acrylic cover 31 is arranged at the mounting hole to completely cover the mounting hole.
  • a temperature sensor is also provided in the pump head 21 and a heating device is also provided at the position of the pump head 21 . Both the temperature sensor and the heating device are electrically connected to the intelligent driving board 33 .
  • the permanent magnet brushless motor 1 has been disclosed in our company's previous patent application.
  • the water pump 2 is a screen 32 shielded self-priming pump.
  • the pump is the same, and the brushless motor 1 drives the impeller to rotate to pressurize; the wire cover box 3 is sealed everywhere by the sealing structure.

Abstract

A permanent-magnetic variable-frequency constant-pressure self-priming pump, comprising a permanent-magnetic brushless electric motor (1), a water pump (2) and an intelligent control system, wherein an inner end of a lower side portion of a pump head (21) of the water pump (2) is connected to an output end of the permanent-magnetic brushless electric motor (1), and an outer end thereof is connected to a pressure tank (22); the pressure tank (22) is in communication with a water outlet cavity; the intelligent control system comprises a line cover box (3) arranged on the permanent-magnetic brushless electric motor (1), an intelligent drive plate (33) arranged in the line cover box (3), and a liquid crystal touch-control screen (32) arranged at the top of the line cover box (3); the intelligent drive plate (33) is electrically connected to the permanent-magnetic brushless electric motor (1) and the liquid crystal touch-control screen (32) by means of a power supply line; the pump head (21) is also provided with a water pressure sensor (34) extending to the interior of the pump head (21); and the water pressure sensor (34) is electrically connected to the intelligent drive plate (33) by means of the power supply line so as to feed back water pressure.

Description

永磁变频恒压自吸泵Permanent magnet variable frequency constant pressure self-priming pump 技术领域technical field
本发明涉及自吸泵，尤其涉及永磁变频恒压自吸泵。The invention relates to a self-priming pump, in particular to a permanent magnet variable-frequency constant-pressure self-priming pump.
背景技术Background technique
目前，市场上的自吸泵存在水流开关容易堵死、卡死，寿命低，出水压力不稳定以及智能化程度低的问题。At present, the self-priming pumps on the market have the problems that the water flow switch is easily blocked, stuck, has a low lifespan, unstable water outlet pressure, and a low degree of intelligence.
发明内容SUMMARY OF THE INVENTION
本发明公布了永磁变频恒压自吸泵，解决了背景技术中提到的问题。The invention discloses a permanent magnet variable frequency constant pressure self-priming pump, which solves the problems mentioned in the background art.
为解决上述技术问题，本发明具体采用如下技术方案：In order to solve the above-mentioned technical problems, the present invention specifically adopts the following technical solutions:
永磁变频恒压自吸泵，其包括永磁无刷电机、水泵和智能控制系统，水泵的泵头下侧部分里端连接于永磁无刷电机的输出端，外端连接有压力罐，压力罐与出水腔连通；智能控制系统包括设置于永磁无刷电机上的线罩盒、设置于线罩盒内的智能驱动板及设置于线罩盒顶部的液晶触控屏，智能驱动板通过电源线与永磁无刷电机及液晶触控屏电连接，泵头上还设有伸入到泵头内部的水压传感器，水压传感器通过电源线与智能驱动板电连接以反馈水压。The permanent magnet variable frequency constant pressure self-priming pump includes a permanent magnet brushless motor, a water pump and an intelligent control system. The inner end of the lower part of the pump head is connected to the output end of the permanent magnet brushless motor, and the outer end is connected with a pressure tank. The pressure tank is communicated with the water outlet; the intelligent control system includes a wire cover box arranged on the permanent magnet brushless motor, an intelligent drive board arranged in the wire cover box, and a liquid crystal touch screen arranged on the top of the wire cover box, and the intelligent drive board It is electrically connected to the permanent magnet brushless motor and the liquid crystal touch screen through the power cord. The pump head is also provided with a water pressure sensor extending into the pump head. The water pressure sensor is electrically connected to the intelligent drive board through the power cord to feedback the water pressure. .
泵头内包括位于泵头上侧的进水腔和出水腔、位于泵头下侧的增压腔，进水腔与出水腔分别与增压腔连通，进水腔和出水腔的腔壁上分别设有进水口和出水口。The pump head includes a water inlet cavity and a water outlet cavity located on the upper side of the pump head, and a booster cavity located on the lower side of the pump head. The water inlet cavity and the water outlet cavity are respectively connected with the booster cavity. There are water inlet and water outlet respectively.
泵头顶部设有注水孔，注水孔处设有注水螺栓，注水孔位于出水腔一侧。The top of the pump head is provided with a water injection hole, a water injection bolt is arranged at the water injection hole, and the water injection hole is located on one side of the water outlet cavity.
泵头顶部设有水流开关，水流开关位于出水口处。There is a water flow switch on the top of the pump head, and the water flow switch is located at the water outlet.
智能驱动板通过电源线与电源连接，且智能驱动板的电源输入处设有熔断丝。The intelligent drive board is connected to the power supply through a power cord, and a fuse is provided at the power input of the intelligent drive board.
线罩盒顶部设有安装孔，液晶触控屏安装于线罩盒顶部的内壁上，安装孔处设有将安装孔全覆盖的亚克力盖板。An installation hole is arranged on the top of the wire cover box, the LCD touch screen is installed on the inner wall of the top of the wire cover box, and an acrylic cover plate is arranged at the installation hole to completely cover the installation hole.
泵头内还设有温度传感器且泵头位置还设有加热装置，温度传感器与加热装置均与智能驱动板电连接。A temperature sensor is also arranged in the pump head and a heating device is also arranged at the position of the pump head. Both the temperature sensor and the heating device are electrically connected with the intelligent driving board.
相对于现有技术，本发明具有如下有益效果：Compared with the prior art, the present invention has the following beneficial effects:
本产品采用永磁无刷高速高效电机、进口芯片、高精度压力传感器、水控开关、结合先进的电子控制技术，实现智能变频、恒压调速，具有节能高效优点；另外，本水泵工作范围宽、扬程高、流量大，适应多工况运行，且体积小、重量轻、外形美观、使用方便，管路水平安装或90°角安装均可；控制面板设置操作简单、无需专业人员调试；通过压力传感器实现水压反馈，再通过智能驱动板控控制启停，避免卡机，延长使用寿命。This product adopts permanent magnet brushless high-speed and high-efficiency motor, imported chip, high-precision pressure sensor, water control switch, combined with advanced electronic control technology to realize intelligent frequency conversion, constant voltage speed regulation, and has the advantages of energy saving and high efficiency; in addition, the working range of this pump is Wide, high lift, large flow, suitable for operation in multiple working conditions, small size, light weight, beautiful appearance, easy to use, can be installed horizontally or at a 90° angle; the control panel is easy to set and operate, and no professional debugging is required; The water pressure feedback is realized by the pressure sensor, and the start and stop are controlled by the intelligent drive board control, so as to avoid the machine jam and prolong the service life.
附图说明Description of drawings
图1为本发明的立体图。FIG. 1 is a perspective view of the present invention.
图2为本发明的立体图(去除线罩盒顶部壳体)。Figure 2 is a perspective view of the present invention (with the top casing of the wire cover box removed).
图中：1-永磁无刷电机、2-水泵、21-泵头、211-进水口、212-出水口、2121-水流开关、22-压力罐、23-注水螺栓、3-线罩盒、31-亚克力盖板、32-液晶触控屏、33-智能驱动板、34-水压传感器。In the picture: 1- permanent magnet brushless motor, 2- water pump, 21- pump head, 211- water inlet, 212- water outlet, 2121- water flow switch, 22- pressure tank, 23- water injection bolt, 3- wire cover box , 31-Acrylic cover, 32-LCD touch screen, 33-Intelligent drive board, 34-Water pressure sensor.
具体实施方式Detailed ways
下面结合附图和实施例来详细说明本发明的具体内容。The specific content of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.
如图1-图2所示，永磁变频恒压自吸泵，其包括永磁无刷电机1、水泵2和智能控制系统，水泵2的泵头21下侧部分里端连接于永磁 无刷电机1的输出端，外端连接有压力罐22，压力罐22与出水腔连通；智能控制系统包括设置于永磁无刷电机1上的线罩盒3、设置于线罩盒3内的智能驱动板33及设置于线罩盒3顶部的液晶触控屏32，智能驱动板33通过电源线与永磁无刷电机1及液晶触控屏32电连接，泵头21上还设有伸入到泵头21内部的水压传感器34，水压传感器34通过电源线与智能驱动板33电连接以反馈水压。As shown in Figures 1-2, the permanent magnet variable frequency constant pressure self-priming pump includes a permanent magnet brushless motor 1, a water pump 2 and an intelligent control system. The inner end of the lower part of the pump head 21 of the water pump 2 is connected to the permanent magnet The output end of the brush motor 1 is connected to a pressure tank 22 at the outer end, and the pressure tank 22 is communicated with the water outlet chamber; the intelligent control system includes a wire cover box 3 arranged on the permanent magnet brushless motor 1, and a The intelligent drive board 33 and the liquid crystal touch screen 32 arranged on the top of the wire cover box 3 are electrically connected with the permanent magnet brushless motor 1 and the liquid crystal touch screen 32 through the power cord. The pump head 21 is also provided with an extension. The water pressure sensor 34 is inserted into the pump head 21, and the water pressure sensor 34 is electrically connected to the intelligent driving board 33 through the power cable to feedback the water pressure.
泵头21内包括位于泵头21上侧的进水腔和出水腔、位于泵头21下侧的增压腔，进水腔与出水腔分别与增压腔连通，进水腔和出水腔的腔壁上分别设有进水口211和出水口212。The pump head 21 includes a water inlet cavity and a water outlet cavity located on the upper side of the pump head 21, and a booster cavity located on the lower side of the pump head 21. The water inlet cavity and the water outlet cavity are respectively connected with the booster cavity. A water inlet 211 and a water outlet 212 are respectively provided on the cavity wall.
泵头21顶部设有注水孔，注水孔处设有注水螺栓23，注水孔位于出水腔一侧。The top of the pump head 21 is provided with a water injection hole, and the water injection hole is provided with a water injection bolt 23, and the water injection hole is located on one side of the water outlet cavity.
泵头21顶部设有水流开关2121，水流开关2121位于出水口212处。The top of the pump head 21 is provided with a water flow switch 2121 , and the water flow switch 2121 is located at the water outlet 212 .
智能驱动板33通过电源线与电源连接，且智能驱动板33的电源输入处设有熔断丝。The intelligent driving board 33 is connected to the power supply through a power cable, and a fuse is provided at the power input of the intelligent driving board 33 .
线罩盒3顶部设有安装孔，液晶触控屏32安装于线罩盒3顶部的内壁上，安装孔处设有将安装孔全覆盖的亚克力盖板31。The top of the cable cover box 3 is provided with a mounting hole, the liquid crystal touch screen 32 is mounted on the inner wall of the top of the cable cover box 3 , and an acrylic cover 31 is arranged at the mounting hole to completely cover the mounting hole.
泵头21内还设有温度传感器且泵头21位置还设有加热装置，温度传感器与加热装置均与智能驱动板33电连接。A temperature sensor is also provided in the pump head 21 and a heating device is also provided at the position of the pump head 21 . Both the temperature sensor and the heating device are electrically connected to the intelligent driving board 33 .
其中永磁无刷电机1在本公司在先申请的专利中已公开，另外该水泵2为屏32蔽式自吸泵，泵头21内增压部分与现有技术中屏32蔽式自吸泵相同，通过无刷电机1带动叶轮转动来增压；其中线罩盒3各处均通过密封结构密封。Among them, the permanent magnet brushless motor 1 has been disclosed in our company's previous patent application. In addition, the water pump 2 is a screen 32 shielded self-priming pump. The pump is the same, and the brushless motor 1 drives the impeller to rotate to pressurize; the wire cover box 3 is sealed everywhere by the sealing structure.
最后说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的宗旨和范围，其均应涵盖在本发明的权利要求范围当中。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions, without departing from the spirit and scope of the technical solutions of the present invention, should all be included in the scope of the claims of the present invention.

Claims (6)

  1. 永磁变频恒压自吸泵，其包括永磁无刷电机、水泵和智能控制系统，其特征在于：水泵的泵头下侧部分里端连接于永磁无刷电机的输出端，外端连接有压力罐，压力罐与出水腔连通；智能控制系统包括设置于永磁无刷电机上的线罩盒、设置于线罩盒内的智能驱动板及设置于线罩盒顶部的液晶触控屏，智能驱动板通过电源线与永磁无刷电机及液晶触控屏电连接，泵头上还设有伸入到泵头内部的水压传感器，水压传感器通过电源线与智能驱动板电连接以反馈水压。The permanent magnet variable frequency constant pressure self-priming pump includes a permanent magnet brushless motor, a water pump and an intelligent control system, and is characterized in that the inner end of the lower part of the pump head of the water pump is connected to the output end of the permanent magnet brushless motor, and the outer end is connected to the permanent magnet brushless motor. There is a pressure tank, and the pressure tank is communicated with the water outlet cavity; the intelligent control system includes a wire cover box arranged on the permanent magnet brushless motor, an intelligent drive board arranged in the wire cover box, and a liquid crystal touch screen arranged on the top of the wire cover box. , the intelligent drive board is electrically connected with the permanent magnet brushless motor and the liquid crystal touch screen through the power cord, the pump head is also provided with a water pressure sensor extending into the pump head, and the water pressure sensor is electrically connected with the intelligent drive board through the power cord to feedback water pressure.
  2. 根据权利要求1所述的永磁变频恒压自吸泵，其特征在于：泵头内包括位于泵头上侧的进水腔和出水腔、位于泵头下侧的增压腔，进水腔与出水腔分别与增压腔连通，进水腔和出水腔的腔壁上分别设有进水口和出水口。The permanent magnet variable frequency constant pressure self-priming pump according to claim 1, wherein the pump head includes a water inlet cavity and a water outlet cavity located on the upper side of the pump head, a booster cavity located on the lower side of the pump head, and a water inlet cavity. The water outlet cavity is respectively communicated with the pressurization cavity, and the water inlet and the water outlet are respectively provided on the cavity walls of the water inlet cavity and the water outlet cavity.
  3. 根据权利要求2所述的永磁变频恒压自吸泵，其特征在于：泵头顶部设有注水孔，注水孔处设有注水螺栓，注水孔位于出水腔一侧。The permanent magnet variable frequency constant pressure self-priming pump according to claim 2, wherein the top of the pump head is provided with a water injection hole, and the water injection hole is provided with a water injection bolt, and the water injection hole is located on one side of the water outlet cavity.
  4. 根据权利要求2所述的永磁变频恒压自吸泵，其特征在于：泵头顶部设有水流开关，水流开关位于出水口处。The permanent magnet variable frequency constant pressure self-priming pump according to claim 2, wherein the top of the pump head is provided with a water flow switch, and the water flow switch is located at the water outlet.
  5. 根据权利要求1所述的永磁变频恒压自吸泵，其特征在于：智能驱动板通过电源线与电源连接，且智能驱动板的电源输入处设有熔断丝。The permanent magnet variable frequency constant voltage self-priming pump according to claim 1, wherein the intelligent drive board is connected to the power supply through a power cord, and a fuse is provided at the power input of the intelligent drive board.
  6. 根据权利要求1所述的永磁变频恒压自吸泵，其特征在于：线罩盒顶部设有安装孔，液晶触控屏安装于线罩盒顶部的内壁上，安 装孔处设有将安装孔全覆盖的亚克力盖板。The permanent magnet variable frequency constant pressure self-priming pump according to claim 1, characterized in that: the top of the wire cover box is provided with a mounting hole, the liquid crystal touch screen is installed on the inner wall of the top of the wire cover box, and the mounting hole is provided with a Acrylic cover with full hole coverage.
PCT/CN2021/098862 2021-01-29 2021-06-08 Permanent-magnetic variable-frequency constant-pressure self-priming pump WO2022160549A1 (en)

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Publication number Priority date Publication date Assignee Title
CN112761967A (en) * 2021-01-29 2021-05-07 浙江西菱股份有限公司 Permanent magnet frequency conversion constant pressure self-priming pump

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CN209943024U (en) * 2019-04-25 2020-01-14 浙江富莱欧机电有限公司 Intelligent permanent magnet frequency conversion multistage constant pressure pump
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CN204755326U (en) * 2015-07-22 2015-11-11 温岭市恒亚机电有限公司 Backpack frequency conversion constant voltage is from inhaling booster pump
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