CN109194026A - A kind of p-m rotor of axial flow pump - Google Patents

A kind of p-m rotor of axial flow pump Download PDF

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Publication number
CN109194026A
CN109194026A CN201811143348.0A CN201811143348A CN109194026A CN 109194026 A CN109194026 A CN 109194026A CN 201811143348 A CN201811143348 A CN 201811143348A CN 109194026 A CN109194026 A CN 109194026A
Authority
CN
China
Prior art keywords
shaft
rotor
retainer plate
shape memory
active ring
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
CN201811143348.0A
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Chinese (zh)
Other versions
CN109194026B (en
Inventor
黄文佳
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.)
Youfu Pump Group Co ltd
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Individual
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 Individual filed Critical Individual
Priority to CN201811143348.0A priority Critical patent/CN109194026B/en
Publication of CN109194026A publication Critical patent/CN109194026A/en
Application granted granted Critical
Publication of CN109194026B publication Critical patent/CN109194026B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/007—Details, component parts, or accessories 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/181—Axial flow rotors
    • 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
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a kind of p-m rotor of axial flow pump, the p-m rotor is fixedly mounted in shaft, and the both ends of the shaft passes through bearing respectively and connect with shell, lid；One end in the shaft close to water outlet port is fixedly connected with an axis flowing water wheel；Axis flowing water wheel includes the retainer plate being fixedly connected with shaft, the active ring being slidably connected with shaft, and the multiple spring leafs being connected between retainer plate and active ring；The shape memory alloy of multiple U-shapeds is also connected between retainer plate and active ring；When shell body temperature is lower than the first set temperature, shape memory alloy is in both ends state close to each other, and each spring leaf at least its outer end and shaft is axially perpendicular at this time；When stator coil and heat coil energization rear shell body temperature are higher than the second set temperature, shape memory alloy is in the state that both ends are located remotely from each other, whether present invention employs shape memory alloys in running order according to temperature control shaft flowing water wheel, simplifies the structure of control circuit.

Description

A kind of p-m rotor of axial flow pump
Technical field
The invention belongs to water pump fields, and in particular to a kind of self-heating axial flow pump structure.
Background technique
Two components of water pump and heater are existed simultaneously in many daily electrical home appliances, equipment, be respectively used to realize draw water and Heating, such as water tank are located at the water dispenser of lower part, and the water heater of hydraulic pressure unstable region, kitchen are precious, the electric heating heated using fluid Blanket etc..The simplification of functional component is more conducive to the design and manufacture of man of complete system plant product.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficienciess of the prior art, providing a kind of compact-sized, body Product self-heating axial flow pump small, with long service life.
Purpose to realize the present invention, is achieved using following technical scheme: a kind of self-heating axial flow pump includes The shell and lid being fixedly connected are fixedly installed with stator module in the shell, are rotatablely installed between the shell and lid There is p-m rotor, the stator module and p-m rotor constitute a motor；
The stator module includes winding portion, is integrally attached to winding portion and connects close to the support portion of lid one end, and integrally Connect the heating part in the winding portion other end；The support portion position is arranged and extend out to integrally formed with along support portion radial direction Wire connecting portion outside shell；
The winding portion circumferentially equidistantly forms multiple iron core slots, is equipped in each iron core slot and is inserted into from outer to inner The iron core component of T shape closely offsets between every two adjacent iron core component, and the cored component of institute collectively forms an entirety and is in The iron core of annular；
First is circumferentially uniformly formed on the support portion and crosses liquid seam, circumferentially uniformly forms the second mistake on the heating part Liquid seam；The outer diameter of the support portion and heating part is equal and is greater than the outer diameter of iron core, is formed between the iron core and inner walls One annular heat-dissipating space；
It is equipped with stator coil in the winding portion, the heat coil with stator winding electrical series, institute are equipped in the heating part It states wire connecting portion outer end and the connecting terminal being electrically connected with stator coil is installed；
The stator module is by having the laminated type 3d printer printing shaping of double spray heads；
The stator module is formed except coiler part passes through a nozzle printing using ceramic powders, the stator coil, fever Coil is printed after each layer of ceramic powder material printing finishes using graphite glue；The stator module is completed in printing Low-temperature sintering molding is carried out afterwards；
The shell outer end is the water outlet port being connected to enclosure interior, and the lid outer end is the water inlet being connected to enclosure interior Port；
The p-m rotor is fixedly mounted in shaft, and the both ends of the shaft passes through bearing respectively and connect with shell, lid；It is described One end in shaft close to water outlet port is fixedly connected with an axis flowing water wheel；
The axis flowing water wheel includes the retainer plate being fixedly connected with shaft, the active ring being slidably connected with shaft, and connection Multiple spring leafs between retainer plate and active ring；The note of multiple U-shapeds is also connected between the retainer plate and active ring Recall alloy sheet；When shell body temperature is lower than the first set temperature, shape memory alloy is in both ends state close to each other, this When each spring leaf at least its outer end and shaft it is axially perpendicular；When warm in stator coil and heat coil energization back casing Degree be higher than the second set temperature when, shape memory alloy be in the state that both ends are located remotely from each other, at this time each spring leaf with turn The angle of 60-80 degree is formed between axis axial direction.
As a preferred solution: the position in the shell close to water outlet port is connected with first support, connect in the lid It is connected to second support, two bearings for connecting shaft are respectively fixedly connected among first support, second support.
As a preferred solution: the stator coil include with delta connection connect three phase windings, each phase around Group includes 1 phase winding coil or more than two phase winding coils being connected in parallel；Each phase winding coil be in series with one with On heat coil.
As a preferred solution: the position of installation axle flowing water wheel forms the water wheels mounting portion of polygon, institute in the shaft It states retainer plate inner circumferential and water wheels mounting portion interference fit is socketed, the active ring is slidably connected with water wheels mounting portion.
As a preferred solution: each iron core component is fixedly bonded in winding portion or each described by glue Core assembly periphery is fixed by more than one clips.
Compared with prior art, the beneficial effects of the present invention are: the present invention 3d print by way of made it is built-in The stator module of stator coil and heat coil makes stator module not only be used as the stator winding of motor, but also is used as heater It uses, compact-sized, long service life and small in size reaches space-saving effect when being mounted in complete machine as component.
Specifically, by adjusting the phosphorus content for constituting stator coil, heat coil so as to adjust its conductivity close to electric heating Silk；The stator coil is mainly used for generating electromagnetic field in the energized state to drive p-m rotor to rotate, but itself and hair simultaneously Heat coil is the same also to generate heat, due to being deposited between outer diameter and inner walls between stator module inner circumferential and p-m rotor In the space flowed through for liquid, the heat that stator coil generates can be pulled away in time, and it is excessively high to guarantee that p-m rotor is not temperature And demagnetization, subsequent liquid, which flows through heat coil region, increases fluid temperature further.
The heat coil due to be with stator coil it is concatenated, no longer need to additional wiring, and the wiring of stator coil with The wiring of conventional three-phase motor is just the same.
In the case where output power remains unchanged, by adjusting the input frequency adjustable axle flowing water wheel of stator coil Revolving speed, to adjust the final temperature of trickle in a certain range.
The axis flowing water wheel adjusts the state of spring leaf, the liquid in this way in shell due to being provided with shape memory alloy Spring leaf does not generate the driving force along shell axial direction to liquid not up to before set temperature, and only liquid reaches in shell After set temperature value, spring leaf just generates inclination under the shape inotropic action of shape memory alloy, liquid could be pushed along shell Body axially flows, and avoids liquid is not heated from flowing outwardly.
The case where pump and heater control respectively compared with prior art, pump can open again after a period of work in heater It is dynamic, and whether present invention employs shape memory alloys in running order according to temperature control shaft flowing water wheel, simplifies control electricity The structure on road.
Detailed description of the invention
Fig. 1 is schematic cross-sectional view of the invention.
Fig. 2 is decomposition texture schematic diagram of the invention.
Fig. 3 is the structural schematic diagram of stator module.
Fig. 4 is the structural schematic diagram of axis flowing water wheel.
Fig. 5 is the connection figure of stator coil and heat coil of the present invention.
91, shell；911, water outlet port；912, first support；913, connection jaws；
92, lid；921, intake port；922, second support；
93, stator module；931, support portion；932, wire connecting portion；933, winding portion；934, heating part；935, first liquid seam is crossed； 936, iron core slot；937, second liquid seam is crossed；9301, stator coil；9302, heat coil；
94, iron core；941, iron core component；
95, p-m rotor；951, shaft；9511, water wheels mounting portion；952, bearing；
96, axis flowing water wheel；961, retainer plate；962, active ring；963, spring leaf；964, shape memory alloy.
Specific embodiment
Embodiment 1
According to Fig. 1 to Fig. 5, the present embodiment is a kind of self-heating axial flow pump, includes the shell 91 being fixedly connected and lid Body 92 is fixedly installed with stator module 93 in the shell, p-m rotor 95, institute is rotatably equipped between the shell and lid It states stator module and p-m rotor constitutes a motor.
The stator module includes winding portion 933, is integrally attached to support portion 931 of the winding portion close to lid one end, And it is integrally attached to the heating part 934 of the winding portion other end；The support portion position is integrally formed with along support portion radius side To being arranged and extend out to the wire connecting portion 932 outside shell.
The winding portion circumferentially equidistantly forms multiple iron core slots 936, be equipped in each iron core slot from outer and The iron core component 941 of the T shape of interior insertion closely offsets between every two adjacent iron core component, the cored common structure of component of institute At the iron core 94 of an entirety in a ring.
First is circumferentially uniformly formed on the support portion crosses liquid seam 935, circumferentially uniformly molding on the heating part There is second to cross liquid seam 937；The outer diameter of the support portion and heating part is equal and is greater than the outer diameter of iron core, in the iron core and shell An annular heat-dissipating space is formed between wall.
It is equipped with stator coil 9301 in the winding portion, the fever with stator winding electrical series is equipped in the heating part Coil 9302, the wire connecting portion outer end are equipped with the connecting terminal being electrically connected with stator coil.
Specifically, the arrangement of coiled pipe form can be used in the heat coil.
The stator module is by having the laminated type 3d printer printing shaping of double spray heads.The stator module removes coil part Divide using ceramic powders through a nozzle printing molding, the stator coil, heat coil are in each layer of ceramic powder material Printing is printed after finishing using graphite glue；The stator module carries out low-temperature sintering molding after the completion of printing.
The shell outer end is the water outlet port 911 being connected to enclosure interior, and the lid outer end is to connect with enclosure interior Logical water inlet port 921.
The p-m rotor is fixedly mounted in shaft 951, and the both ends of the shaft passes through bearing 952 and shell, lid respectively Body connection；One end in the shaft close to water outlet port is fixedly connected with an axis flowing water wheel 96.
The axis flowing water wheel includes the retainer plate 961 being fixedly connected with shaft, the active ring being slidably connected with shaft 962, and the multiple spring leafs 963 being connected between retainer plate and active ring；Also connect between the retainer plate and active ring It is connected to the shape memory alloy 964 of multiple U-shapeds；When shell body temperature is lower than the first set temperature, shape memory alloy is in both ends Portion's state close to each other, each spring leaf at least its outer end and shaft is axially perpendicular at this time；When stator coil and hair When heat coil energization rear shell body temperature is higher than the second set temperature, shape memory alloy is in the state that both ends are located remotely from each other, The angle of 60-80 degree is formed between each spring leaf and shaft axial direction at this time.
First set temperature is room temperature, liquid in other words it is not heated when general temperature, may be set to 20-40 DEG C, second set temperature is the target temperature after liquid heating, and such as heating water may be set to 90-100 DEG C.The memory is closed Gold plaque is accordingly designed according to the demand of specific heating liquid.Shape memory alloy, which uses, in the present invention has double-pass memory effect Memory alloy material production.
Position in the shell close to water outlet port is connected with first support 912, and second is connected in the lid Frame 922, two bearings for connecting shaft are respectively fixedly connected among first support, second support.
The stator coil includes three phase windings connected with delta connection, each phase winding include 1 phase around Group coil or more than two phase winding coils being connected in parallel；Each phase winding coil is in series with more than one heat coil.
The position of installation axle flowing water wheel forms the water wheels mounting portion 9511 of polygon in the shaft, in the retainer plate Week is socketed with water wheels mounting portion interference fit, and the active ring is slidably connected with water wheels mounting portion.
Each iron core component is fixedly bonded in winding portion by glue or each core assembly periphery is logical More than one clips are crossed to fix.
The present invention has made the stator module of internal stator coil and heat coil in such a way that 3d is printed, and makes stator pack Part had not only been used as the stator winding of motor, but also used as heater, compact-sized, long service life and small in size, as Reach space-saving effect when component is mounted in complete machine.
Specifically, by adjusting the phosphorus content for constituting stator coil, heat coil so as to adjust its conductivity close to electric heating Silk；The stator coil is mainly used for generating electromagnetic field in the energized state to drive p-m rotor to rotate, but itself and hair simultaneously Heat coil is the same also to generate heat, due to being deposited between outer diameter and inner walls between stator module inner circumferential and p-m rotor In the space flowed through for liquid, the heat that stator coil generates can be pulled away in time, and it is excessively high to guarantee that p-m rotor is not temperature And demagnetization, subsequent liquid, which flows through heat coil region, increases fluid temperature further.
The heat coil due to be with stator coil it is concatenated, no longer need to additional wiring, and the wiring of stator coil with The wiring of conventional three-phase motor is just the same.
In the case where output power remains unchanged, by adjusting the input frequency adjustable axle flowing water wheel of stator coil Revolving speed, to adjust the final temperature of trickle in a certain range.
The axis flowing water wheel adjusts the state of spring leaf, the liquid in this way in shell due to being provided with shape memory alloy Spring leaf does not generate the driving force along shell axial direction to liquid not up to before set temperature, and only liquid reaches in shell After set temperature value, spring leaf just generates inclination under the shape inotropic action of shape memory alloy, liquid could be pushed along shell Body axially flows, and avoids liquid is not heated from flowing outwardly.
The case where pump and heater control respectively compared with prior art, pump can open again after a period of work in heater It is dynamic, and whether present invention employs shape memory alloys in running order according to temperature control shaft flowing water wheel, simplifies control electricity The structure on road.

Claims (2)

1. a kind of p-m rotor of axial flow pump, it is characterised in that: the p-m rotor is fixedly mounted in shaft, the shaft Both ends pass through bearing respectively and connect with shell, lid；One end in the shaft close to water outlet port is fixedly connected with an axis Flowing water wheel；
The axis flowing water wheel includes the retainer plate being fixedly connected with shaft, the active ring being slidably connected with shaft, and connection Multiple spring leafs between retainer plate and active ring；The note of multiple U-shapeds is also connected between the retainer plate and active ring Recall alloy sheet；When shell body temperature is lower than the first set temperature, shape memory alloy is in both ends state close to each other, this When each spring leaf at least its outer end and shaft it is axially perpendicular；When warm in stator coil and heat coil energization back casing Degree be higher than the second set temperature when, shape memory alloy be in the state that both ends are located remotely from each other, at this time each spring leaf with turn The angle of 60-80 degree is formed between axis axial direction.
2. a kind of p-m rotor of axial flow pump as described in claim 1, it is characterised in that: installation axle flowing water in the shaft The position of wheel forms the water wheels mounting portion of polygon, and the retainer plate inner circumferential and water wheels mounting portion interference fit are socketed, described Active ring is slidably connected with water wheels mounting portion.
CN201811143348.0A 2017-09-28 2017-09-28 Permanent magnet rotor of axial flow water pump Active CN109194026B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811143348.0A CN109194026B (en) 2017-09-28 2017-09-28 Permanent magnet rotor of axial flow water pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811143348.0A CN109194026B (en) 2017-09-28 2017-09-28 Permanent magnet rotor of axial flow water pump
CN201710901977.4A CN107489656B (en) 2017-09-28 2017-09-28 A kind of self-heating axial flow pump

Related Parent Applications (1)

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CN201710901977.4A Division CN107489656B (en) 2017-09-28 2017-09-28 A kind of self-heating axial flow pump

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CN109194026A true CN109194026A (en) 2019-01-11
CN109194026B CN109194026B (en) 2020-07-07

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CN201811142275.3A Active CN109088486B (en) 2017-09-28 2017-09-28 stator module of axial flow water pump
CN201811143348.0A Active CN109194026B (en) 2017-09-28 2017-09-28 Permanent magnet rotor of axial flow water pump

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CN201811142275.3A Active CN109088486B (en) 2017-09-28 2017-09-28 stator module of axial flow water pump

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CN110304246A (en) * 2019-06-28 2019-10-08 华中科技大学 A kind of bionical folding wings and its preparation method and application based on 4D printing
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CN105966582A (en) * 2016-05-25 2016-09-28 哈尔滨工业大学 Ship transformable propeller based on bidirectional shape memory polymer composite propeller blades

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111648984A (en) * 2019-03-04 2020-09-11 东芝生活电器株式会社 Electric blower and electric dust collector
CN111648984B (en) * 2019-03-04 2022-06-07 东芝生活电器株式会社 Electric blower and electric dust collector
CN110304246A (en) * 2019-06-28 2019-10-08 华中科技大学 A kind of bionical folding wings and its preparation method and application based on 4D printing

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CN107489656A (en) 2017-12-19

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