CN115607796B - Low-noise electromagnetic valve with high control precision and high sensitivity for breathing machine and breathing machine - Google Patents
Low-noise electromagnetic valve with high control precision and high sensitivity for breathing machine and breathing machine Download PDFInfo
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- CN115607796B CN115607796B CN202211156536.3A CN202211156536A CN115607796B CN 115607796 B CN115607796 B CN 115607796B CN 202211156536 A CN202211156536 A CN 202211156536A CN 115607796 B CN115607796 B CN 115607796B
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- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 35
- 230000035945 sensitivity Effects 0.000 title claims abstract description 35
- 230000003068 static effect Effects 0.000 claims abstract description 30
- 239000000945 filler Substances 0.000 claims abstract description 14
- 230000004044 response Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 2
- 230000004907 flux Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 241000711573 Coronaviridae Species 0.000 description 1
- 208000004756 Respiratory Insufficiency Diseases 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 201000004193 respiratory failure Diseases 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
- A61M16/20—Valves specially adapted to medical respiratory devices
- A61M16/201—Controlled valves
- A61M16/202—Controlled valves electrically actuated
- A61M16/203—Proportional
- A61M16/204—Proportional used for inhalation control
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Heart & Thoracic Surgery (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Veterinary Medicine (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity and the breathing machine, and belongs to the technical field of electromagnetic valves. The problems of low flow control precision, insufficient sensitivity and insufficient noise of the electromagnetic valve of the existing breathing machine are solved. The electromagnetic valve comprises a static valve core, an electromagnetic coil, a shell, a movable valve core, a spring plate seat, a plane spring plate and a filler neck, wherein the static valve core and the movable valve core are armatures, the lower end of the movable valve core penetrates through the spring plate seat to extend into the shell, the movable valve core is arranged, a supporting plane spring plate is sleeved on the upper part of the movable valve core, the movable valve core can move up and down, an inner ring of the supporting plane spring plate supports the movable valve core, and a plurality of turns of electromagnetic coils are wound on the static valve core and the movable valve core; the number of turns of the electromagnetic coil is 1590-1600, the wire diameter is 0.1-0.12mm, the mass of the movable valve core is 1-2g, the length L of the static valve core is 12-13mm, and the diameter D is 4-6mm. The invention is suitable for the requirements of high-requirement control precision, sensitivity and low noise of the breathing machine.
Description
Technical Field
The invention belongs to the technical field of electromagnetic valves, and particularly relates to a low-noise electromagnetic valve with high control precision and high sensitivity for a breathing machine and the breathing machine.
Background
In modern clinical medicine, a respirator is used as an effective means capable of providing energy to replace autonomous ventilation of a person by the outside, and is widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation, and has a very important position in the field of modern medicine. Particularly, with the amounting to the year 2019, the novel coronavirus has been abused, and the demand for the breathing machine is very large at home and abroad. One of the key components of the breathing machine is an electromagnetic valve, the working principle of the electromagnetic valve for the breathing machine is that the electromagnetic valve is applied with voltage to generate current, the current passes through an internal coil of the electromagnetic valve to generate a magnetic field, the magnetic field is conducted to two ends of an air gap through a magnetic conduction element in the electromagnetic valve, so that electromagnetic attraction force is generated between the air gap to suck an armature in a closed state from a valve seat, and the valve is opened to realize that an input electric signal and an output flow signal are in a linear relation.
The electromagnetic valve of the existing breathing machine has the problems of low flow control precision, insufficient sensitivity and insufficient noise, so that a brand new electromagnetic valve is necessary to be designed to realize the requirements of high control precision, high sensitivity and low noise.
Disclosure of Invention
Therefore, the invention aims to provide a low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity, so as to solve the problems of low flow control precision, insufficient sensitivity and insufficient noise of the electromagnetic valve of the existing breathing machine.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
The low-noise electromagnetic valve for the breathing machine with high control precision and high sensitivity comprises a static valve core, an electromagnetic coil, a shell, a movable valve core, a spring plate seat, a plane spring plate and a filler neck, wherein the static valve core and the movable valve core are armatures, the static valve core is fixed at the bottom of the inside of the shell, the upper end of the shell is in threaded connection with the spring plate seat, a nozzle pipe is in threaded connection with the upper part of the spring plate seat, the lower end of the movable valve core penetrates through the spring plate seat and extends into the shell to be arranged, the upper part of the movable valve core is sleeved with a supporting plane spring plate, the movable valve core can be moved up and down, an inner ring of the supporting plane spring plate supports the movable valve core, an outer ring is supported by a supporting block, the supporting block is supported by a supporting plate, and the supporting plate is supported on the spring plate seat; a plurality of turns of electromagnetic coils are wound on the static valve core and the dynamic valve core;
the number of turns of the electromagnetic coil is 1590-1600, the wire diameter is 0.1-0.12mm, the mass of the movable valve core is 1-2g, the length L of the static valve core is 12-13mm, and the diameter D is 4-6mm;
The filler neck is equipped with central inlet channel and a plurality of passageway of giving vent to anger, and a plurality of passageway of giving vent to anger encircle central inlet channel and arrange, and initially, the upper end of moving the case cuts off central inlet channel and a plurality of passageway intercommunication of giving vent to anger under the effect of plane shell fragment, and the lower extreme of moving the case is equipped with the clearance with the upper end of quiet case, when the electric signal input to solenoid valve, forms the magnetic field after the solenoid circular telegram, and moving the case and remove under the effect of solenoid magnetic field, realizes the opening volume change of intercommunication between central inlet channel and the passageway of giving vent to anger, and the gas flows in the gas outlet of the passageway of giving vent to anger from the gas inlet of central inlet channel after moving the case and opening completely.
Further, the number of turns of the magnetic coil is 1595, the wire diameter is 0.11mm, the mass of the movable valve core is 1.5g, the length L of the static valve core is 12.5mm, and the diameter D is 5mm.
Further, the power-on and power-off response time of the electromagnetic valve is 5ms and 7ms respectively; the precision is controlled within +/-1%, and the noise is lower than 20dB.
Further, the plane shrapnel comprises an inner ring, an outer ring and a plurality of shrapnels, the shrapnels are uniformly arranged between the inner ring and the outer ring, and two ends of the shrapnels are respectively connected with the inner ring and the outer ring.
Furthermore, the upper end of the spring plate seat is provided with a flaring, the flaring is provided with a supporting step, the supporting plate is of an annular structure, the outer annular surface of the supporting plate is arranged on the supporting step, the inner annular surface of the supporting plate is matched with a groove on the movable valve core, and the width of the groove is larger than the thickness of the supporting plate.
Further, initially, the inner annular surface of the support plate abuts against the lower wall surface of the groove, and after the power is on, the movable valve core moves downwards to compress the elastic sheet to deform the elastic sheet until the inner annular surface of the support plate abuts against the upper wall surface of the groove.
Further, the planar spring sheet comprises three spring sheets.
Furthermore, the filler neck comprises a hollow small cylinder and a hollow large cylinder which are coaxially arranged, the hollow large cylinder is fixed on the hollow small cylinder, the bottom end of the hollow small cylinder is arranged inside the hollow large cylinder, a central air inlet channel is formed inside the hollow small cylinder, and a plurality of through air outlet channels are uniformly formed on the surface of an annular disc of the hollow large cylinder.
Further, initially, under the action of the plane spring, the upper end of the movable valve core is propped against the bottom end of the central air inlet channel of the filler neck.
Another object of the present invention is to provide a breathing apparatus, including the above electromagnetic valve.
Compared with the prior art, the low-noise electromagnetic valve for the breathing machine, which is provided by the invention, has the beneficial effects that:
(1) The low-noise electromagnetic valve for the breathing machine, which has high control precision and high sensitivity, is created by the application, the space for winding the electromagnetic coil is limited in the shell, and the flow regulation precision and the use condition of the electromagnet are affected by the temperature rise generated by the electromagnetic coil. It is therefore necessary to achieve a large magnetomotive force with as little heat cost as possible under volumetric constraints; by limiting the number of turns of the electromagnetic coil to 1595 and the wire diameter to 0.11mm, the realization of larger magnetomotive force with the smallest possible heat cost under the volume constraint is realized, so that the flow regulation precision is ensured; the electromagnetic valve accuracy of the application is controlled within +/-1%.
(2) The application creates the low-noise electromagnetic valve with high control precision and high sensitivity for the breathing machine, wherein the moving valve core, namely the moving armature, is used as a moving part, and the larger the mass is, the longer the dynamic response time of the electromagnetic valve is; although the dynamic response speed can be improved by reducing the mass of the movable valve core, namely the movable armature, according to the magnetic circuit structure of the electromagnet, the movable valve core, namely the movable armature, is too small to cause magnetic saturation, so that the magnetic resistance of the original magnetic circuit is increased, and finally, the effective magnetic force line in the electromagnet is reduced; therefore, the structure of the movable valve core needs to fully consider the mass of the movable armature and the total magnetic flux of the effective magnetic force lines; the application improves the dynamic response speed while guaranteeing the magnetic load capacity by setting the mass of the movable valve core, namely the movable armature, to be 1-2 g; the power-on and power-off response time of the electromagnetic valve can reach 5ms and 7ms respectively.
(3) The low-noise electromagnetic valve for the breathing machine, which is high in control precision and high in sensitivity, has the advantages that when the static valve core with a short axial length is adopted, the sectional area of the magnetic leakage magnetic circuit is reduced, so that the magnetic resistance of the magnetic leakage magnetic circuit is increased, magnetomotive force generated by a coil is fully utilized, and the thrust density and the operation efficiency of an electromagnet in the electromagnetic coil are improved; the length range of the static valve core, namely the static armature, is limited to be 12-13mm, the diameter range is limited to be 2-3mm, and the influence of the movement of the movable valve core on magnetic flux distribution is reduced, so that the condition that the thrust force changes suddenly is reduced, the noise is reduced, and the noise of the electromagnetic valve is lower than 20dB.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute an undue limitation on the invention. In the drawings:
FIG. 1 is a schematic perspective view of a low noise solenoid valve for a ventilator with high control accuracy and high sensitivity according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a low noise solenoid valve for a ventilator with high control accuracy and high sensitivity according to an inventive embodiment of the present invention;
FIG. 3 is a schematic cross-sectional perspective view of a low-noise solenoid valve for a ventilator with high control accuracy and high sensitivity according to an embodiment of the present invention;
FIG. 4 is a top view of a low noise solenoid valve for a ventilator with high control accuracy and high sensitivity according to an embodiment of the present invention;
FIG. 5 is a bottom view of a low noise solenoid valve for a ventilator with high control accuracy and high sensitivity according to an embodiment of the present invention;
FIG. 6 is a front view of a low noise solenoid valve for a ventilator with high control accuracy and high sensitivity according to an embodiment of the present invention;
FIG. 7 is a right side view of a low noise solenoid valve for a ventilator with high control accuracy and high sensitivity according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a planar spring plate of a low-noise solenoid valve for a ventilator with high control accuracy and high sensitivity according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of electromagnetic circuit structure and electromagnetic analysis of a low-noise electromagnetic valve for a ventilator with high control accuracy and high sensitivity according to an embodiment of the invention;
fig. 10 is a force analysis chart of a plane spring sheet of a low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity in use according to an embodiment of the invention.
Reference numerals illustrate:
1. An electromagnetic valve; 2. a static valve core; 3. an electromagnetic coil; 4. a housing; 5. a movable valve core; 6. a spring plate seat; 7. a plane spring plate; 8. a filler neck.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention disclosed herein without departing from the scope of the invention.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention will be understood in a specific case by those skilled in the art.
In addition, the technical features which are described below and which are involved in the various embodiments of the invention can be combined with one another as long as they do not conflict with one another.
As shown in fig. 1-8, the low-noise electromagnetic valve with high control precision and high sensitivity for the breathing machine comprises a static valve core 2, an electromagnetic coil 3, a shell 4, a movable valve core 5, a spring plate seat 6, a plane spring plate 7 and a filler neck 8, wherein the static valve core 2 and the movable valve core 5 are armatures, the static valve core 2 is fixed at the bottom inside the shell 4, the upper end of the shell 4 is in threaded connection with the spring plate seat 6, the nozzle neck 8 is in threaded connection with the upper part of the spring plate seat 6, the lower end of the movable valve core 5 penetrates the spring plate seat 6 and stretches into the shell 4 to be arranged, the movable valve core 5 is sleeved on the upper part of the movable valve core 5, the movable valve core 5 can move up and down, the inner ring of the movable valve core 5 is supported by a supporting block, the outer ring is supported by a supporting plate, and the supporting plate is supported on the spring plate seat 6; a plurality of turns of electromagnetic coils 3 are wound on the static valve core 2 and the movable valve core 5;
The number of turns of the electromagnetic coil 3 is 1590-1600, the wire diameter is 0.1-0.12mm, the mass of the movable valve core 5 is 1-2g, the length L of the static valve core 2 is 12-13mm, and the diameter D is 4-6mm;
The filler neck 8 is provided with a central air inlet channel and a plurality of air outlet channels, the plurality of air outlet channels are arranged around the central air inlet channel, the upper end of the movable valve core 5 cuts off the communication between the central air inlet channel and the plurality of air outlet channels under the action of the plane elastic sheet 7, a gap is arranged between the lower end of the movable valve core 5 and the upper end of the static valve core 2, when an electric signal is input to the electromagnetic valve 1, the electromagnetic coil 3 is electrified to form a magnetic field, the movable valve core 5 moves under the action of the magnetic field of the electromagnetic coil 3, the change of the opening amount of the communication between the central air inlet channel and the air outlet channel is realized, and gas flows into the gas outlet of the air outlet channel from the gas inlet of the central air inlet channel after the movable valve core 5 is opened; the gas flow has close relation with the inlet and outlet pressure difference and the opening of the movable valve core 5, so that the relation between the electric signal of the electromagnetic valve 1 and the mechanical signal and the gas flow signal of the displacement of the movable valve core 5 is established.
The number of turns of the magnetic coil is 1595, the wire diameter is 0.11mm, the mass of the movable valve core 5 is 1.5g, the length L of the static valve core 2 is 12.5g, and the diameter D is 5mm. The power-on and power-off response time of the electromagnetic valve 1 is 5ms and 7ms respectively; the precision is controlled within +/-1%, and the noise is lower than 20dB. The electromagnetic valve has higher flow control precision, higher sensitivity and lower noise, and is suitable for high requirements on a breathing machine.
The plane spring 7 comprises an inner ring, an outer ring and a plurality of spring pieces, wherein the spring pieces are uniformly arranged between the inner ring and the outer ring, and two ends of the spring pieces are respectively connected with the inner ring and the outer ring. The plane spring 7 comprises three spring plates. The movable valve core 5 can be well supported by the arrangement, and the stress is uniform.
The upper end of the spring plate seat 6 is provided with a flaring, the flaring is provided with a supporting step, the supporting plate is of an annular structure, the outer annular surface of the supporting plate is arranged on the supporting step, the inner annular surface of the supporting plate is matched with a groove on the movable valve core 5, and the width of the groove is larger than the thickness of the supporting plate.
Initially, the inner annular surface of the supporting plate is propped against the lower wall surface of the groove, and the upper end of the movable valve core 5 is propped against the bottom end of the central air inlet channel of the filler neck under the action of the plane spring plate 7; after being electrified, the movable valve core 5 moves downwards, and the elastic sheet is pressed to deform until the inner annular surface of the supporting plate abuts against the upper wall surface of the groove.
The filler neck 8 comprises a hollow small cylinder and a hollow large cylinder which are coaxially arranged, the hollow large cylinder is fixed on the hollow small cylinder, the bottom end of the hollow small cylinder is arranged inside the hollow large cylinder, a central air inlet channel is formed inside the hollow small cylinder, and a plurality of through air outlet channels are uniformly formed on the surface of an annular disc of the hollow large cylinder.
As shown in fig. 9, which is a schematic diagram of electromagnetic circuit structure and electromagnetic analysis of the electromagnetic valve, it can be seen that the too small moving valve core/moving armature 5 will cause magnetic saturation, resulting in increased magnetic resistance of the original magnetic circuit, and finally reducing the effective magnetic force lines in the electromagnetic valve. The optimisation of the structure of the moving core/armature 5 therefore requires not only optimisation of the mass of the armature but also consideration of the total flux of the effective magnetic field lines. Since the effective magnetic flux of the electromagnet is related to the excitation strength of the static valve core/static armature 2, the housing 4 and the electromagnetic coil 3, the optimal design of the moving valve core/moving armature 5 needs to be matched with other electromagnetic components. The mass equation, the magnetic flux equation and the electromagnetic thrust equation of the movable valve core/movable armature 5 can be established, and the equation is combined, so that the mass and the magnetic load capacity of the movable valve core/movable armature 5 are comprehensively considered, and the movable armature is optimized in a multi-objective and multi-constraint manner; the mass of the moving valve core/moving armature 5 is relatively suitable.
As shown in fig. 10, the number of turns of the electromagnetic coil 3 is 1595, the wire diameter is 0.11mm, the mass of the movable valve core 5 is 1-2g, the length L of the static valve core 2 is 12-13mm, and the diameter D is 4-6mm, and the force distribution of the plane spring 7 is uniform, and the force is smaller, that is, the impact on the plane spring 7 and the like is small when the movable valve core 5 of the electromagnetic valve moves, so that the noise is also small.
The application also provides a breathing machine comprising the electromagnetic valve 1 and a turbine.
The inventive embodiments disclosed above are merely intended to help illustrate the inventive embodiments. The examples are not intended to be exhaustive or to limit the invention to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (10)
1. A low noise solenoid valve for breathing machine with high control accuracy, high sensitivity, its characterized in that: the electromagnetic valve comprises a static valve core (2), an electromagnetic coil (3), a shell (4), a movable valve core (5), a spring plate seat (6), a plane spring plate (7) and a filler neck (8), wherein the static valve core (2) and the movable valve core (5) are armatures, the static valve core (2) is fixed at the bottom inside the shell (4), the upper end of the shell (4) is in threaded connection with the spring plate seat (6), the nozzle neck (8) is in threaded connection with the upper part of the spring plate seat (6), the lower end of the movable valve core (5) penetrates through the spring plate seat (6) to extend into the shell (4) for arrangement, the movable valve core (5) can move up and down, the inner ring of the support plane spring plate (7) supports the movable valve core (5), the outer ring is supported by a supporting block, and the supporting block is supported on the spring plate seat (6); a plurality of turns of electromagnetic coils (3) are wound on the static valve core (2) and the movable valve core (5);
The number of turns of the electromagnetic coil (3) is 1590-1600, the wire diameter is 0.1-0.12mm, the mass of the movable valve core (5) is 1-2g, the length L of the static valve core (2) is 12-13mm, and the diameter D is 4-6mm;
The filler neck (8) is equipped with central inlet channel and a plurality of passageway of giving vent to anger, a plurality of passageway of giving vent to anger is encircleed central inlet channel and is arranged, initially, move under the effect of plane shell fragment (7) in valve core (5), the upper end of moving valve core (5) cuts off central inlet channel and a plurality of passageway intercommunication of giving vent to anger, the lower extreme of moving valve core (5) is equipped with the clearance with the upper end of quiet case (2), when electric signal input to solenoid valve (1), form the magnetic field after solenoid (3) circular telegram, move under the effect of solenoid (3) magnetic field in valve core (5), realize the opening volume change of intercommunication between central inlet channel and the passageway of giving vent to anger, the gas flows into the gas outlet of the passageway of giving vent to anger by the gas inlet of central inlet channel after moving valve core (5) are opened completely.
2. The low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity according to claim 1, wherein the electromagnetic valve is characterized in that: the number of turns of the magnetic coil is 1595, the wire diameter is 0.11mm, the mass of the movable valve core (5) is 1.5g, the length L of the static valve core (2) is 12.5mm, and the diameter D is 5mm.
3. The low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity according to claim 2, wherein the electromagnetic valve is characterized in that: the power-on and power-off response time of the electromagnetic valve (1) is 5ms and 7ms respectively; the precision is controlled within +/-1%, and the noise is lower than 20dB.
4. The low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity according to claim 1, wherein the electromagnetic valve is characterized in that: the plane elastic sheet (7) comprises an inner ring, an outer ring and a plurality of elastic sheets, wherein the elastic sheets are uniformly arranged between the inner ring and the outer ring, and two ends of the elastic sheets are respectively connected with the inner ring and the outer ring.
5. The low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity according to claim 1, wherein the electromagnetic valve is characterized in that: the upper end of the elastic sheet seat (6) is provided with a flaring, the flaring is provided with a supporting step, the supporting plate is of an annular structure, the outer annular surface of the supporting plate is arranged on the supporting step, the inner annular surface of the supporting plate is matched with a groove on the movable valve core (5), and the width of the groove is larger than the thickness of the supporting plate.
6. The low-noise electromagnetic valve with high control precision and high sensitivity for a breathing machine according to claim 5, wherein the electromagnetic valve is characterized in that: initially, the inner annular surface of the supporting plate is propped against the lower wall surface of the groove, and after the power is on, the movable valve core (5) moves downwards to compress the elastic sheet to deform the elastic sheet until the inner annular surface of the supporting plate is propped against the upper wall surface of the groove.
7. The low-noise electromagnetic valve with high control precision and high sensitivity for a breathing machine according to claim 4, wherein the electromagnetic valve is characterized in that: the plane spring sheet (7) comprises three spring sheets.
8. The low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity according to claim 1, wherein the electromagnetic valve is characterized in that: the filler neck (8) comprises a hollow small cylinder and a hollow large cylinder which are coaxially arranged, the hollow large cylinder is fixed on the hollow small cylinder, the bottom end of the hollow small cylinder is arranged inside the hollow large cylinder, a central air inlet channel is formed inside the hollow small cylinder, and a plurality of through air outlet channels are uniformly formed on the surface of an annular disc of the hollow large cylinder.
9. The low-noise electromagnetic valve for a breathing machine with high control precision and high sensitivity according to claim 1, wherein the electromagnetic valve is characterized in that: initially, under the action of a plane spring piece (7), the upper end of the movable valve core (5) is propped against the bottom end of the central air inlet channel of the filler neck.
10. A ventilator, characterized in that: a solenoid valve (1) comprising any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211156536.3A CN115607796B (en) | 2022-09-22 | 2022-09-22 | Low-noise electromagnetic valve with high control precision and high sensitivity for breathing machine and breathing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211156536.3A CN115607796B (en) | 2022-09-22 | 2022-09-22 | Low-noise electromagnetic valve with high control precision and high sensitivity for breathing machine and breathing machine |
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| CN115607796A CN115607796A (en) | 2023-01-17 |
| CN115607796B true CN115607796B (en) | 2024-04-26 |
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| CN215780800U (en) * | 2021-06-01 | 2022-02-11 | 北京航天新立科技有限公司 | Micro-miniature proportional electromagnetic valve device applied to breathing machine |
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| US6556012B2 (en) * | 2000-01-21 | 2003-04-29 | Kabushiki Kaisha Toshiba | Magnetic resonance imaging apparatus |
| US20040108395A1 (en) * | 2001-09-13 | 2004-06-10 | Hitachi, Ltd. | Electromagnetic fuel injector |
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| CN102797898A (en) * | 2011-05-28 | 2012-11-28 | 李景峰 | Micro solenoid valve with low power consumption |
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| CN213899897U (en) * | 2020-10-15 | 2021-08-06 | 深圳市安保科技有限公司 | Proportional flow valve |
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| CN115607796A (en) | 2023-01-17 |
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