CN114776610A - Air supply device and portable breathing machine - Google Patents
Air supply device and portable breathing machine Download PDFInfo
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- CN114776610A CN114776610A CN202210392584.6A CN202210392584A CN114776610A CN 114776610 A CN114776610 A CN 114776610A CN 202210392584 A CN202210392584 A CN 202210392584A CN 114776610 A CN114776610 A CN 114776610A
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- 230000029058 respiratory gaseous exchange Effects 0.000 title abstract description 14
- 238000005192 partition Methods 0.000 claims description 19
- 230000007704 transition Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0057—Pumps therefor
- A61M16/0066—Blowers or centrifugal pumps
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
-
- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an air source device and a portable respirator, wherein the air source assembly comprises a shell assembly and a motor assembly arranged in the shell assembly, an impeller assembly is fixedly arranged at the output end of the motor assembly, an air duct assembly is arranged between the impeller assembly and the motor assembly, the air duct assembly is coaxially and fixedly arranged on the motor assembly, and a gap is arranged between the air duct assembly and the impeller assembly; a first air flow channel and a second air flow channel which are respectively communicated with the impeller assembly are formed between the air channel assembly and the shell assembly, and the inlet of the first air flow channel and the outlet of the second air flow channel are distributed along the circumferential direction of the air channel assembly; the shell assembly is provided with an air source inlet and an air source outlet which are respectively communicated with the inlet of the first air flow channel and the outlet of the second air flow channel. The internal structure of the invention is highly integrated, which is more beneficial to the miniaturization development of the breathing machine equipment, and simultaneously, through the structure optimization, the air inlet direction and the air outlet direction are positioned on the same plane, and the noise of the air duct is greatly reduced.
Description
Technical Field
The invention relates to the technical field of breathing machines, in particular to an air source device and a portable breathing machine.
Background
The respirator mainly comprises an air source device and a control device, wherein the air source device is a core part of the respirator and mainly comprises a fan assembly, and the control device mainly comprises a control circuit, a flow pressure monitoring device, a control key, a display screen, a power supply, a pipeline, a humidifier, a face mask and the like. In order to improve sleep breathing, the application of a household ventilator is becoming more and more popular, but during travel such as business trips and travels, the space of a trunk is limited, so that the ventilator is required to be more miniaturized for convenient carrying. As ventilators become more miniaturized (smaller in size), the difficulty of integrating a blower into a small space increases. Especially, the air source device with the traditional structure adopts the existing turbofan, the air inlet direction is arranged along the circumferential direction of the turbofan, the air outlet direction is over against the axial direction of the turbofan, the air inlet direction and the air outlet direction are not on the same plane but are positioned in a three-dimensional space, the volume of the turbofan is large, and meanwhile, the noise is large.
Disclosure of Invention
The invention aims to provide an air source device and a portable respirator aiming at the defects in the prior art, the internal structure is highly integrated, the miniaturization development of respirator equipment is facilitated, and meanwhile, through structural optimization, the air inlet direction and the air outlet direction are positioned on the same plane, and the noise of an air channel is greatly reduced.
The technical scheme for realizing the aim of the invention is as follows:
an air source device comprises a shell assembly and a motor assembly arranged in the shell assembly, wherein an output end of the motor assembly is fixedly provided with an impeller assembly, an air channel assembly is arranged between the impeller assembly and the motor assembly, the air channel assembly is coaxially and fixedly arranged on the motor assembly, and a gap is formed between the air channel assembly and the impeller assembly; a first air flow channel and a second air flow channel which are respectively communicated with the impeller assembly are formed between the air duct assembly and the shell assembly, and the inlet of the first air flow channel and the outlet of the second air flow channel are distributed along the circumferential direction of the air duct assembly; and the shell assembly is provided with an air source inlet and an air source outlet which are respectively communicated with the inlet of the first air flow channel and the outlet of the second air flow channel.
Furthermore, the air duct assembly comprises a bottom plate and an upper seat which are coaxially arranged in a clearance mode, a spiral plate is arranged on the outer side of the upper seat in a surrounding mode, the lower end of the spiral plate is connected with the bottom plate, the upper end of the spiral plate is flush with the top of the upper seat, and a partition plate is fixedly installed on the bottom plate; the partition plate, the bottom plate, the upper seat, the upper side of the spiral plate and the inner wall of the shell assembly form a first air flow channel; the partition, the bottom plate, the upper seat, the lower side of the spiral plate and the inner wall of the shell assembly form a second airflow channel.
Further, the spiral plate comprises a spiral section and a horizontal section which are connected, and the rotation angle alpha of the spiral plate is 300-320 degrees.
Furthermore, the connecting parts of the partition plate, the spiral plate, the bottom plate and the upper seat are in smooth transition.
Furthermore, the upper seat is in a horn shape with a large upper part and a small lower part, so that the space of the first airflow channel and the space of the second airflow channel are enlarged as much as possible in a relatively narrow space, and the airflow size is improved.
Further, the top of upper seat is equipped with the first annular retaining ring that upwards extends, and the bottom is equipped with the second annular retaining ring that extends to the center of upper seat for upper seat and impeller assembly laminate more, avoid the air current diffusion, thereby improve the air current flow.
Further, the outer diameter of the spiral plate is the same as that of the bottom plate, so that the processing difficulty of the shell matched with the spiral plate is simplified.
Further, the impeller subassembly includes wheel hub and lower apron, be equipped with along circumference evenly distributed and be a plurality of blades that the clearance set up between wheel hub and the lower apron, wheel hub and lower apron pass through the blade fixed linking to each other, wheel hub's center is equipped with downwardly extending's first annular frustum, the one end of blade extends to wheel hub's outer peripheral face, is equipped with the clearance between the other end and the first annular frustum.
Further, the blades are of arc structures and distributed in the left-hand direction, and the enveloping angle beta of the blades is 45-50 degrees.
Further, the height of the blade gradually increases from one end away from the hub center to the other end near the hub center.
Furthermore, blade and wheel hub integrated into one piece, stable in structure, the lower surface of blade is equipped with the bead, be equipped with on the apron down with bead assorted spacing recess, it is a plurality of be equipped with the holding pin on the bead, be equipped with the pinhole that corresponds with the holding pin on the spacing recess, the holding pin interference is installed in the pinhole. Not only the equipment is convenient, guarantees simultaneously that the bottom of blade can closely laminate between with lapping down, guarantees the leakproofness of contact surface, avoids the air current diffusion, effectively noise reduction when improving the air current flow.
Furthermore, the bottom plate is of an annular structure, an annular boss extending to the inner ring of the bottom plate is arranged at the top of the motor assembly, positioning and installation are facilitated, the outer ring of the annular boss is tightly attached to the inner ring of the bottom plate, and air tightness of a contact surface is guaranteed.
Furthermore, the center of the annular boss is provided with a second annular frustum which extends upwards, so that a certain guiding effect is exerted on air flowing out of the impeller assembly, the phenomenon that the air flow is blocked due to the fact that the bottom plate is perpendicular to the air flow direction is avoided, and the air flow speed is improved.
Furthermore, the shell assembly comprises an upper shell, a lower shell and a side cover plate which are mutually clamped, the upper shell is provided with an annular plate matched with the air duct assembly, and the annular plate is provided with a first through hole and a second through hole which are respectively opposite to the inlet of the first air flow channel and the outlet of the second air flow channel; and pipelines are respectively communicated between the first through hole and the air source inlet and between the second through hole and the air source outlet.
Furthermore, a circuit board is fixedly mounted in the shell assembly, the motor assembly is electrically connected with the circuit board, and an electrical interface electrically connected with the circuit board is arranged on the side cover plate.
The utility model provides a portable breathing machine, includes controlling means and as above the air supply unit, be equipped with the mechanical interface that matches each other between the casing subassembly of air supply unit and the controlling means, can dismantle fixed connection through mechanical interface between air supply unit and the controlling means.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the air channel assembly is arranged in the shell assembly, so that the structure is highly integrated, compared with an air source module of a traditional respirator, the air blower shell is removed, the air channel assembly is arranged, a first air flow channel and a second air flow channel which are respectively communicated with the impeller assembly are formed between the air channel assembly and the shell assembly, and meanwhile, an inlet of the first air flow channel and an outlet of the second air flow channel are distributed along the circumferential direction of the air channel assembly, so that the existing fan structure is changed, the air inlet direction and the air outlet direction are positioned on the same plane, the respirator equipment is more beneficial to miniaturization development, and the air channel noise is greatly reduced.
(2) According to the air duct assembly, the first air flow channel is formed by the partition plate, the bottom plate, the upper seat, the upper side of the spiral plate and the inner wall of the shell assembly, the second air flow channel is formed by the partition plate, the bottom plate, the upper seat, the lower side of the spiral plate and the inner wall of the shell assembly, the structure is compact, the design is very ingenious, the air inlet simulation and the air outlet direction can be arranged along the circumferential direction of the air duct assembly without an external pipeline, and the occupied space is small.
(3) The spiral plate is optimized into the spiral section and the horizontal section which are connected, the horizontal section enables the outlet of the first air flow channel to be relatively narrow, the air flow is gathered, the flow speed is improved, meanwhile, the rotation angle alpha of the spiral plate is limited to be 300-320 degrees, the flow channel design requirement is met in a narrow space, the structural design is reasonable, the flow pressure loss is reduced by combining the air inlet and exhaust flowing characteristics of the impeller assembly, the flow field quality is improved, and the noise is reduced.
(4) The connecting parts of the partition board and the spiral plate with the bottom board and the upper seat respectively are in smooth transition, so that the smoothness of airflow flowing is ensured.
(5) According to the invention, adjacent blades are arranged in a clearance manner, and a clearance is arranged between one end of each blade close to the center of the hub and the first annular frustum, so that a plurality of flow channels which are respectively communicated with the first air flow channel and the second air flow channel are formed; through the setting of first annular frustum, play certain guide and the effect of assembling to the air current of each runner export to improve the air current velocity of flow.
(6) The blades of the invention are of an arc structure and distributed in a left-handed direction, and when the impeller assembly rotates, the blades drive air to form vortex rotation, so that the flow and the pressure are improved, the enveloping angle beta of each blade is 45-50 degrees, and the test shows that the air speed at the outlet of the lower end of the impeller assembly under the angle setting is greatly improved to 50-60 m/s.
(7) The height of the vanes of the invention is gradually increased, thereby ensuring that the sizes of all the cross sections of each flow passage on the impeller assembly are kept almost the same, and reducing airflow noise caused by the change of the cross sections of the flow passages as much as possible.
(8) The shell assembly is composed of the upper shell, the lower shell and the side plates which are clamped with each other, the assembly is convenient, and the annular plate is matched with the air duct assembly, so that a first air flow channel and a second air flow channel are formed.
(9) The shell assembly is internally pre-provided with a circuit board electrically connected with the motor assembly, and the side cover plate of the shell assembly is provided with an electrical appliance interface electrically connected with the circuit board, so that the shell assembly is conveniently connected with a control device of a breathing machine.
(10) The portable respirator is provided with the air source device with a highly integrated structure, is smaller in structure, low in noise, and capable of obviously increasing airflow and pressure, is detachably and fixedly connected with the conventional control device through the mechanical interface, is more compact in structure, and is more convenient to store and carry compared with the traditional split structure.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a perspective view of the air supply assembly of the present invention;
FIG. 2 is a view showing the internal structure of the air supply apparatus of the present invention;
FIG. 3 is a perspective view of the upper shell of the present invention;
FIG. 4 is a top plan view of the air supply assembly of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4 in accordance with the present invention;
FIG. 6 is a perspective view of the air duct assembly of the present invention;
FIG. 7 is a schematic view of the blade and hub structure of the present invention;
FIG. 8 is a perspective view of the lower deck of the present invention;
FIG. 9 is a schematic view of the envelope angle of the blades of the present invention;
FIG. 10 is a schematic view of the rotation angle of the spiral plate according to the present invention.
The reference numbers in the drawings are:
the device comprises a shell component 1, an upper shell 1-1, an annular plate 1-1, a first through hole 1-1-2, a second through hole 1-1-3, a lower shell 1-2, a side cover plate 1-3, an electrical interface 1-3-1, a motor component 2, an annular boss 2-1, a second annular frustum 2-1, an impeller component 3, a hub 3-1, a first annular frustum 3-1-1, a lower cover plate 3-2, a limiting groove 3-2-1, a pin hole 3-2-2, a blade 3-3, a rib 3-3-1, a fastening pin 3-3-2, an air duct component 4, a bottom plate 4-1, an upper seat 4-2, a first annular retainer ring 4-2-1, a spiral plate 4-3, 4-3-1 spiral section, 4-3-2 horizontal section, 4-4 partition board, 5 gas source inlet, 6 gas source outlet, 7 pipeline, 8 circuit board and 9 mechanical interface.
Detailed Description
In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.
(example 1)
As shown in fig. 1 to 10, the portable respirator comprises a control device and an air source device which are detachably and fixedly connected, the air source device comprises a housing assembly 1, and a motor assembly 2, an impeller assembly 3 and an air duct assembly 4 which are arranged in the housing assembly 1, wherein the housing assembly 1 is provided with an air source inlet 5 and an air source outlet 6, the impeller assembly 3 is fixedly arranged at the output end of the motor assembly 2, the air duct assembly 4 is arranged between the impeller assembly 3 and the motor assembly 2, and is coaxially and fixedly arranged on the motor assembly 2, and a gap is arranged between the air duct assembly 3 and the impeller assembly 3. This embodiment structure is highly integrated, compare with the air supply module of traditional breathing machine, the fan casing has been got rid of, the current fan structure has been changed, form first airflow channel and the second airflow channel who communicates impeller subassembly 3 respectively between wind channel subassembly 4 and the casing subassembly 1, the entry of first airflow channel and the export of second airflow channel all distribute and communicate air supply import 5 and air supply export 6 respectively along the circumference of wind channel subassembly 4, not only realize that the direction of admitting air is located the coplanar with the direction of giving vent to anger, be favorable to breathing machine equipment miniaturization development more, the wind channel noise has been reduced greatly simultaneously.
Specifically, the shell assembly 1 comprises an upper shell 1-1, a lower shell 1-2 and a side cover plate 1-3 which are clamped with each other, a ring-shaped plate 1-1-1 matched with the air duct assembly 4 is arranged on the inner wall of the upper shell 1-1, and a first through hole 1-1-2 and a second through hole 1-1-3 which are respectively opposite to an inlet of the first air flow channel and an outlet of the second air flow channel are formed in the ring-shaped plate 1-1-1. The motor component 2 is fixedly arranged on the inner wall of the lower shell 1-2, and pipelines 7 are respectively communicated between the first through hole 1-1-2 and the air source inlet 5 and between the second through hole 1-1-3 and the air source outlet 6. A circuit board 8 is fixedly installed in the shell component 1, the motor component 2 is electrically connected with the circuit board 8, and an electrical interface 1-3-1 electrically connected with the circuit board 8 is arranged on the side cover plate 1-3, so that the electrical connection with a control device of the breathing machine can be conveniently realized. The side cover plates 1-3 are provided with mechanical interfaces 9 matched with the control device, the mechanical interfaces 9 of the embodiment are threaded holes, and the air source device and the control device can be detachably connected in a mode that screws are screwed into the threaded holes.
The impeller component 3 comprises a hub 3-1, a lower cover plate 3-2 and blades 3-3, wherein twelve blades are arranged on the blades 3-3 and are uniformly distributed between the hub 3-1 and the lower cover plate 3-2 along the circumferential direction, a gap is formed between every two adjacent blades 3-3, a first annular frustum 3-1-1 extending downwards is arranged in the center of the hub 3-1, one end of each blade 3-3 extends to the outer circumferential surface of the hub 3-1, and a gap is formed between the other end of each blade 3-3 and the first annular frustum 3-1, so that twelve flow channels respectively communicating the first air flow channel and the second air flow channel are formed. The arrangement of the first annular frustum 3-1-1 plays a certain role in guiding and converging air flow at the outlet of each flow channel, so that the air flow velocity is improved, the smooth transition between the first annular frustum 3-1-1 and the hub 3-1 is realized, and the air flow velocity flowing through the impeller assembly 3 is further improved. In order to further improve the flow and pressure of the air flow, the blades 3-3 of the present embodiment are configured in an arc structure and distributed in a left-handed direction, and when the impeller assembly 3 rotates, the air is driven to form a vortex rotation, so that a supercharging function is realized. The enveloping angle beta of each blade 3-3 is 45-50 degrees, and the wind speed at the outlet of the lower end of the impeller component 3 is greatly improved to 50-60 m/s.
The blades 3-3 and the hub 3-1 are integrally formed, the structure is stable, the lower surface of each blade 3-3 is provided with a convex edge 3-3-1, the lower cover plate 3-2 is provided with a limiting groove 3-2-1 matched with the convex edge 3-3-1, fastening pins 3-3-2 are arranged on the three convex edges 3-3-1 which are uniformly distributed, the limiting groove 3-2-1 is provided with a pin hole 3-2-2 corresponding to the fastening pin 3-3-2, and the lower cover plate 3-2 and the blades 3-3 are fixedly connected by installing the fastening pins 3-3-2 in the pin holes 3-2-2 in an interference manner. The assembling is convenient, and meanwhile, due to the arrangement of the convex edges 3-3-1 and the limiting grooves 3-2-1, the bottom of the blades 3-3 can be tightly attached to the lower cover plate 3-2, the sealing performance of a contact surface is ensured, the air flow diffusion is avoided, the air flow is improved, and meanwhile, the noise is effectively reduced. In order to further reduce noise, the height of the blade 3-3 of the present embodiment is gradually increased from one end far from the center of the hub 3-1 to the other end near the center of the hub 3-1, so as to ensure that the respective cross-sectional sizes of each flow passage on the impeller assembly 3 are kept almost the same, and to minimize airflow noise caused by the change in the cross-sectional area of the flow passage.
The air duct assembly 4 comprises a bottom plate 4-1, an upper seat 4-2, a spiral plate 4-3 and a partition plate 4-4, wherein the bottom plate 4-1 and the upper seat 4-2 are coaxially arranged in a clearance mode, the spiral plate 4-3 is arranged on the outer side of the upper seat 4-2 in a surrounding mode, the lower end of the spiral plate is connected with the bottom plate 4-1, the upper end of the spiral plate is flush with the top of the upper seat 4-2, the partition plate 4-4 is vertically and fixedly installed on the bottom plate 4-1, the top of the partition plate extends to the spiral plate 4-3, and the inner side of the partition plate extends to the outer side of the upper seat 4-2. The outer diameter of the spiral plate 4-3 is the same as the outer diameter of the bottom plate 4-1. The partition plate 4-4, the bottom plate 4-1, the upper seat 4-2, the upper side of the spiral plate 4-3 and the annular plate 1-1-1 form a first air flow channel, and the partition plate 4-4, the bottom plate 4-1, the upper seat 4-2, the lower side of the spiral plate 4-3 and the inner wall of the annular plate 1-1-1 form a second air flow channel.
The spiral plate 4-3 comprises a spiral section 4-3-1 and a horizontal section 4-3-2 which are connected, and the outlet of the first airflow channel is relatively narrow through the arrangement of the horizontal section 4-3-2, so that the airflow is gathered, and the flow speed is improved. The rotation angle alpha of the spiral plate 4-3 is 300-320 degrees, so that the flow channel design requirement is met in a narrow space, the structural design is reasonable, the characteristics of air inlet and exhaust flowing of the impeller are combined, the flowing pressure loss is reduced, the flow field quality is improved, and the noise is reduced.
In order to further improve the smoothness of the air flow, the connecting positions of the partition plate 4-4, the spiral plate 4-3, the bottom plate 4-1 and the upper seat 4-2 are all in smooth transition. The upper seat 4-2 is in a horn shape with a large upper part and a small lower part, so that the space of the first airflow channel and the space of the second airflow channel are enlarged as much as possible in a relatively narrow space, and the airflow is increased. The top of the upper seat 4-2 is provided with a first annular retainer ring 4-2-1 extending upwards, and the bottom of the upper seat 4-2 is provided with a second annular retainer ring 4-2-2 extending towards the center of the upper seat 4-2, so that the upper seat 4-2 is more attached to the impeller assembly 3, air flow diffusion is avoided, and air flow is improved.
In order to facilitate positioning and installation, the base plate 4-1 of the embodiment is of an annular structure, the top of the motor component 2 is provided with an annular boss 2-1 extending to the inner ring of the base plate 4-1, and the outer ring of the annular boss 2-1 is tightly attached to the inner ring of the base plate 4-1, so that the air tightness of a contact surface is ensured. The center of the annular boss 2-1 is provided with a second annular frustum 2-1-1 extending upwards, so that a certain guiding effect is achieved on air flowing out of the impeller assembly 3, the phenomenon that the air flow is blocked due to the fact that the bottom plate 4-1 is perpendicular to the air flow direction is avoided, and the air flow speed is improved.
The portable breathing machine of this embodiment is equipped with the highly integrated air supply unit of structure, and the structure is smaller and more exquisite, and the noise is low simultaneously, and airflow and pressure obviously increase, can dismantle fixed connection through mechanical interface with current controlling means, and the structure is compacter, compares in traditional split type structure, is convenient for accomodate and carry more. Through set up wind channel subassembly 4 in casing subassembly 1, the structure is highly integrated, compare with the air supply module of traditional breathing machine, the fan casing has been got rid of, through setting up wind channel subassembly 4, make and formed the first airflow channel and the second airflow channel who communicate impeller subassembly 3 respectively between casing subassembly 1, the entry of first airflow channel and the export of second airflow channel all distribute along wind channel subassembly 4's circumference simultaneously, the current fan structure has been changed, not only realize that the direction of admitting air is located the coplanar with the direction of giving vent to anger, be favorable to breathing machine equipment miniaturization development more, the wind channel noise has been reduced greatly simultaneously.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An air supply assembly characterized by: the air-conditioning fan comprises a shell assembly (1) and a motor assembly (2) arranged in the shell assembly (1), wherein an impeller assembly (3) is fixedly mounted at the output end of the motor assembly (2), an air duct assembly (4) is arranged between the impeller assembly (3) and the motor assembly (2), the air duct assembly (4) is coaxially and fixedly mounted on the motor assembly (2), and a gap is formed between the air duct assembly (4) and the impeller assembly (3); a first air flow channel and a second air flow channel which are respectively communicated with the impeller assembly (3) are formed between the air channel assembly (4) and the shell assembly (1), and the inlet of the first air flow channel and the outlet of the second air flow channel are distributed along the circumferential direction of the air channel assembly (4); and the shell assembly (1) is provided with a gas source inlet (5) and a gas source outlet (6) which are respectively communicated with the inlet of the first gas flow channel and the outlet of the second gas flow channel.
2. A gas supply arrangement as claimed in claim 1, wherein: the air duct assembly (4) comprises a bottom plate (4-1) and an upper seat (4-2) which are coaxially arranged at a clearance, a spiral plate (4-3) is arranged around the outer side of the upper seat (4-2), the lower end of the spiral plate (4-3) is connected with the bottom plate (4-1), the upper end of the spiral plate is flush with the top of the upper seat (4-2), and a partition plate (4-4) is fixedly arranged on the bottom plate (4-1); the partition plate (4-4), the bottom plate (4-1), the upper seat (4-2), the upper side of the spiral plate (4-3) and the inner wall of the shell assembly (1) form a first air flow channel; the partition plate (4-4), the bottom plate (4-1), the upper seat (4-2), the lower side of the spiral plate (4-3) and the inner wall of the shell assembly (1) form a second airflow channel.
3. A gas supply arrangement as claimed in claim 2, wherein: the spiral plate (4-3) comprises a spiral section (4-3-1) and a horizontal section (4-3-2) which are connected, and the rotation angle alpha of the spiral plate (4-3) is 300-320 degrees.
4. A gas supply arrangement as claimed in claim 2, wherein: the joints of the partition plate (4-4), the spiral plate (4-3), the bottom plate (4-1) and the upper seat (4-2) are all in smooth transition.
5. A gas supply arrangement as claimed in claim 1, wherein: the impeller component (3) comprises a hub (3-1) and a lower cover plate (3-2), a plurality of blades (3-3) which are uniformly distributed along the circumferential direction and are arranged in a gap mode are arranged between the hub (3-1) and the lower cover plate (3-2), the hub (3-1) and the lower cover plate (3-2) are fixedly connected through the blades (3-3), a first annular frustum (3-1-1) extending downwards is arranged at the center of the hub (3-1), one end of each blade (3-3) extends to the peripheral face of the hub (3-1), and a gap is formed between the other end of each blade and the first annular frustum (3-1-1).
6. A gas supply arrangement as claimed in claim 5, wherein: the blades (3-3) are of arc structures and distributed in the left-hand direction, and the enveloping angle beta of the blades (3-3) is 45-50 degrees.
7. An air supply assembly as defined in claim 6 wherein: the height of the blade (3-3) is gradually increased from one end far away from the center of the hub (3-1) to the other end close to the center of the hub (3-1).
8. A gas supply arrangement as claimed in claim 1, wherein: the shell assembly (1) comprises an upper shell (1-1), a lower shell (1-2) and a side cover plate (1-3) which are clamped with each other, the upper shell (1-1) is provided with a ring-shaped plate (1-1-1) matched with the air channel assembly (3), and the ring-shaped plate (1-1-1) is provided with a first through hole (1-1-2) and a second through hole (1-1-3) which are respectively opposite to an inlet of the first air flow channel and an outlet of the second air flow channel; and pipelines (7) are respectively communicated between the first through hole (1-1-2) and the air source inlet (5) and between the second through hole (1-1-3) and the air source outlet (6).
9. A gas supply arrangement as claimed in claim 8, wherein: the motor is characterized in that a circuit board (8) is fixedly mounted in the shell component (1), the motor component (2) is electrically connected with the circuit board (8), and an electrical interface (1-3-1) electrically connected with the circuit board (8) is arranged on the side cover plate (1-3).
10. A portable ventilator, characterized in that: comprising a control device and the air supply device as claimed in any one of claims 1 to 9, wherein a matched mechanical interface (9) is arranged between the housing assembly (1) of the air supply device and the control device, and the air supply device and the control device are detachably and fixedly connected through the mechanical interface (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210392584.6A CN114776610B (en) | 2022-04-14 | 2022-04-14 | Air source device and portable respirator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210392584.6A CN114776610B (en) | 2022-04-14 | 2022-04-14 | Air source device and portable respirator |
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| CN114776610A true CN114776610A (en) | 2022-07-22 |
| CN114776610B CN114776610B (en) | 2024-07-12 |
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| CN202210392584.6A Active CN114776610B (en) | 2022-04-14 | 2022-04-14 | Air source device and portable respirator |
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| CN113175443A (en) * | 2021-06-01 | 2021-07-27 | 雷勃电气(嘉兴)有限公司 | Efficient low-noise three-dimensional flow impeller of backward centrifugal fan without volute |
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| US5295784A (en) * | 1991-08-24 | 1994-03-22 | Durr Dental Gmbh & Co. Kg | Suction device, especially for use in dentistry |
| CN101251124A (en) * | 2008-03-25 | 2008-08-27 | 张玘 | Gas compression method using end-face compression as well as end-face compression type electric drive gas source device |
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|---|---|
| CN114776610B (en) | 2024-07-12 |
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