CN103216432B - Diaphragm pump and gas analyzer - Google Patents
Diaphragm pump and gas analyzer Download PDFInfo
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- CN103216432B CN103216432B CN201210017616.0A CN201210017616A CN103216432B CN 103216432 B CN103216432 B CN 103216432B CN 201210017616 A CN201210017616 A CN 201210017616A CN 103216432 B CN103216432 B CN 103216432B
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- coil
- diaphragm
- diaphragm pump
- pump
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Abstract
Present invention relates particularly to a kind of diaphragm pump and gas analyzer for sampling fluids.The diaphragm pump and gas analyzer do straight reciprocating motion using miniature linear reciprocation drive device directly band dynamic diaphragm, that realizes diaphragm pump lashes function, on the one hand, the volume of diaphragm pump can be reduced, so that the compact of diaphragm pump is compact, on the other hand, the miniature linear reciprocation drive device directly exports straight reciprocating motion, not only without middle power consumption, the utilization rate of energy can be improved, and the drive device can do work without staring torque with dynamic diaphragm, the purpose for being pumped into or extruding fluid is realized.
Description
Technical field
The present invention relates to medical Respiratory Care field, and in particular to a kind of diaphragm pump and gas analysis for sampling fluids
Instrument.
Background technology
Diaphragm pump is widely used in instrument and meter, biochemical analysis field because its is simple and compact for structure, good airproof performance,
Its main function is collection fluid sample for Instrumental Analysis.In medical Respiratory Care field, usual gasmetry module is needed
Diaphragm pump is used to be analyzed the gas extraction of patient breathing circuit into module, it is each in patient respiration to monitor in real time
Gas componant, grasps patient condition.At present, the design of gas analysis module tends to miniaturization, high reliability and low-power consumption
Direction is developed, therefore the design size to diaphragm pump, projected life and energy loss propose higher requirement.Simultaneously as
Gasmetry module guard patient respiration when, for different patient's types need gather different flow breathing gas so as to
In measurement, therefore also require that diaphragm pump can be conveniently adjusted uninterrupted, it is sometimes desirable to which diaphragm pump gathers the gas of very little flow
For detection.
At present, the conventional design of diaphragm pump is the rotation that tradition is had into brush or brushless rotary motor, passes through certain transmission
Organisation conversion is linear motion or swings to promote diaphragm to complete pumping or pumping action.
The content of the invention
The present invention provides a kind of new diaphragm pump, and that realizes diaphragm pump lashes function.
The present invention also provides a kind of gas analyzer, and gas is detected using this new diaphragm pump.
In an embodiment of the present invention there is provided a kind of diaphragm pump, including：
At least one fluid access and at least one fluid are engaged in this profession；
At least one has the pump chamber of cavity；
At least one diaphragm, the diaphragm is fitted with the openend of pump chamber cavity, and sealing is formed between diaphragm and pump chamber
Room, the fluid access and fluid are engaged in this profession and connected with closed chamber；
At least one miniature linear reciprocation drive device, the clutch end and film of the miniature linear reciprocation drive device
Piece is connected, and the clutch end of the miniature linear reciprocation drive device operationally does straight reciprocating motion, and band dynamic diaphragm is done
Straight reciprocating motion.
In an alternative embodiment of the invention there is provided a kind of diaphragm pump, including：
At least one fluid access and at least one fluid are engaged in this profession；
At least one has the pump chamber of cavity；
At least one diaphragm, the diaphragm is fitted with the openend of pump chamber cavity, and sealing is formed between diaphragm and pump chamber
Room, the fluid access and fluid are engaged in this profession and connected with closed chamber；
At least one voice coil motor, the voice coil motor includes stator and mover, and the stator is produced and included
The field circuit of air gap, the mover is located in the air gap and can be connected with diaphragm, and the clutch end of the mover is in work
When do straight reciprocating motion, promote diaphragm compress/stretch closed chamber.
In still another embodiment of the process there is provided a kind of gas analyzer, including：
Above-mentioned diaphragm pump, the diaphragm pump is used to be evacuated or inflate；
Gasmetry module, composition and/or concentration for detecting tested gas；
Controller, it controls diaphragm pump to extract tested gas and is supplied to gasmetry module to detect tested gas.
Brief description of the drawings
Fig. 1 is a kind of exploded view of embodiment of diaphragm pump of the present invention；
Fig. 2 is pump head and pump chamber structure schematic diagram in a kind of embodiment；
Fig. 3 is a kind of structural representation of conducting strip in embodiment；
Fig. 4 is a kind of structural representation of embodiment center line coil support；
Fig. 5 is a kind of sectional view of embodiment；
Fig. 6 is a kind of stereogram of embodiment.
Embodiment
The present invention is described in further detail below by embodiment combination accompanying drawing.
In the embodiment of the present application, diaphragm pump has the pump chamber of cavity including at least one, cooperatively forms sealing with pump chamber
At least one diaphragm, the driving reciprocating drive device of diaphragm and at least one fluid access and at least one stream of room
Body is engaged in this profession, and the diaphragm is fitted with the openend of pump chamber cavity, and closed chamber, the fluid access are formed between diaphragm and pump chamber
Engage in this profession and connected with closed chamber with fluid.Done in embodiments of the present invention using miniature linear reciprocation drive device directly band dynamic diaphragm
Straight reciprocating motion, the clutch end of the miniature linear reciprocation drive device is connected with diaphragm, the miniature linear reciprocation
The clutch end of drive device operationally does straight reciprocating motion, so as to promote diaphragm to compress closed chamber, to realize sealing
The input and output of indoor fluid.
Miniature linear reciprocation drive device be a class can directly outputting reciprocating linear movement and compact drive device,
Its clutch end operationally does straight reciprocating motion, such as voice coil motor, linear electric motors, minitype cylinder or micro hydraulic cylinder
Deng.Compact of such drive device itself, and diaphragm acting can be directly driven, without setting transmission mechanism converting motion,
So that receiving space of the diaphragm pump in design without the concern for transmission mechanism, is conducive to the diaphragm that design structure is compact
Pump, and due to eliminating the conversion of motion, it is thus possible to avoid moving the energy being lost in transfer process.
In embodiments of the present invention, diaphragm pump can include one or more pump chambers and diaphragm, and formed one or
Can there are one or more fluid accesses and fluid to engage in this profession in multiple closed chambers, each closed chamber.One closed chamber correspondence one
Individual miniature linear reciprocation drive device, under the driving of miniature linear reciprocation drive device, closed chamber can withdrawn fluid or extrusion
Fluid.The fluid includes liquid, gas or gas-liquid mixture.
Hereinafter diaphragm pump is entered to advance so that miniature linear reciprocation drive device is voice coil motor, fluid is gas as an example
One step explanation.When fluid is gas, fluid access is air inlet pipe, and fluid is engaged in this profession as escape pipe.
Fig. 1-6 are refer to, in one embodiment, diaphragm pump includes the pump housing, diaphragm 3, diaphragm frame 4 and micro drives dress
Put.The pump housing includes pump head 1, pump chamber 2 and pump bracket 13, and the pump head 1 engages in this profession 102 provided with fluid access 101 and fluid, it is clear that
Fluid access 101 and fluid 102 positions of engaging in this profession can also be exchanged.The outside of pump head 1 provided with two respectively with fluid access 101 and stream
Body is engaged in this profession two valves 17 of 102 connections, respectively suction nozzle and outlet nozzle, its respectively with breathing circuit and external detection instrument
Connection.Pump chamber 2 utilizes screw lock with pump head 1, and pump chamber 2 is provided with cavity 201 away from the middle part of the side of pump head 1, in pump chamber 2
Inside also is provided with fluid access and fluid is engaged in this profession, and is connected with the cavity 201.Wherein, pump chamber 2 and the respective stream of pump head 1
Body access is engaged in this profession to correspond with fluid and connected, and is respectively equipped with sealing ring 15 and check valve 16 in respective junction, and this is unidirectional
Valve 16 is used to control the opening and closing that fluid access and fluid are engaged in this profession.Pump bracket 13 includes a side wall and four branch stretched out from side wall
Pin, four legs are locked with the corner of pump head 1 respectively so that pump bracket 13 and one cavity of formation of pump head 1, pump chamber 2, diaphragm 3,
Diaphragm frame 4 and micro drives device are all arranged in the cavity.Diaphragm frame 4 is fixedly mounted on pump bracket 13, and it is firm by diaphragm 3
The one side that pump chamber 2 is provided with cavity 201 is pressed in, and diaphragm 3 encloses a closed chamber with cavity 201.
In the present embodiment, miniature linear reciprocation drive device is voice coil motor.In a kind of instantiation, voice coil loudspeaker voice coil is straight
Line motor can use cylinder type voice coil motor.The voice coil motor includes stator, mover and conducting strip 5,6, described fixed
Son can form the magnetic loop comprising the air gap, and the air gap can be described as air gap, and mover is then located at this gas that stator is formed
In gap.Stator is the magnetic circuit system of voice coil motor, and the magnetic circuit system is fixedly mounted on the pump housing, is formed in magnetic circuit system
One annulus gap 18.Mover includes coil 8 and coil brace 7.The coil 8 is fixedly mounted on coil brace 7, and is placed in air gap
In 18, the one end of the coil brace 7 connects the diaphragm 3.
In a kind of instantiation, Fig. 1 is refer to, magnetic circuit system includes motor magnetic cup 11, permanent magnet 10 and magnetic conduction boots 9.
The motor magnetic cup 11 is cup-shaped (being in cylinder cup in the corresponding example of accompanying drawing), and its bottom inside is towards cup internal projection and outside bottom
Side forms corresponding depression, and its bottom is provided with through hole around the excircle of depression and the middle part of depression, the side wall of pump bracket 13 with
Motor magnetic cup 11 is locked by the through hole near its excircle.Magnetic conduction boots 9 and permanent magnet 10 are stacked gradually installed in motor magnetic cup
In 11 cup, and the formation air gap 18 between cup inwall.
In a kind of instantiation, coil 8 be circular cylinder structure, be fixed on coil brace 7, be placed in air gap 18 it
In, i.e., coil 8 is contained in motor magnetic cup 11 and is surrounded on outside magnetic conduction boots 9 and permanent magnet 10.In order to improve air gap as far as possible
The utilization rate in 18 magnetic fields, advantageously reduces the physical dimension of pump, in one embodiment, and coil 8 is exoskeletal coil, and it is used
Self-binding cord is mutually entwined, and so design can make full use of the confined space of air gap 18, be conducive to design structure size more
Small diaphragm pump so that be distributed sufficiently long effective coil 8 in air gap 18 as far as possible, it is ensured that magnetic thrust.It refer to Fig. 4, line
Coil support 7 has head 701, bar portion 703 and coil mounting bracket 702, and coil mounting bracket 702 is dish, and head 701 is located at line
The side of mounting bracket 702 is enclosed, one end of bar portion 703 is fixed on the opposite side of coil mounting bracket 702, and coil 8 is fixedly mounted on dish
The edge of shape coil mounting bracket 702.The top on the head 701 of coil brace 7 has a boss, and the correspondence boss of diaphragm 3 is provided with
Groove, being coordinated using the boss and groove makes coil brace 7 be connected with diaphragm 3, when coil brace 7 is moved to drive diaphragm 3
Motion, to sealing fluid inside acting.The bar portion 703 of coil brace 7 sequentially passes through magnetic conduction boots 9, permanent magnet 10 and motor magnetic cup
11, its other end passed is movably mounted on motor magnetic cup 11 using supporting member.The supporting member is mainly used in supporting-line
Coil support 7, and ensure that it may move.
In one embodiment, supporting member can be bearing, and the bar portion of coil brace 7 is mounted on bearings.Certainly, support
Part can also be other structures, such as in another embodiment, and the supporting member is an elastic spring 12, and the elastic spring 12 has
There is elastic force that is stretchable and retracting, for example with the structure design that spiral is roundabout.Elastic spring not only has branch to coil brace
The effect of support, and can axially reduce resistance when coil brace 7 works.When coil brace 7 works, elastic spring 12 is therewith
Move together, no relative motion friction, compared with conventional slip bearing, the air pump longevity that the present embodiment bearing-free wear out failure is brought
Life problem, also eliminates the noise that the friction between bearing and axle or collision belt come.Support electricity in the outward flange of elastic spring 12
Machine magnetic cup 11, and be clamped between the side wall of pump bracket 13 and motor magnetic cup 11, to fix elastic spring 12.Elastic spring 12
Center is aligned with the bar portion of coil brace 7, and is locked using steady pin 14, to support coil brace 7.In order to elastic spring 12
Axially reciprocating space is provided, to make air pump structure more compact, in an instantiation, as shown in figure 5, bullet
Property reed 12 be taper, the depression of motor magnetic 11 bottom outsides of cup is also taper, consistent with the tapered direction of elastic spring so that
11 axial cross sections of motor magnetic cup are substantially in the M shapes stood upside down.Contact surface and permanent magnet 10 between magnetic conduction boots 9 and permanent magnet 10
Contact surface between motor magnetic cup 11 is the conical surface, and the angle of the conical surface can be with motor magnetic cup towards the one side of elastic spring
The angle of the conical surface is identical.The magnetic conduction boots and permanent magnet of taper add the area of the side of magnetic conduction boots 9, and this structure causes air gap 18
Interior magnetic field is more uniformly spread radial and axial, and when being worked so as to coil 8 in air gap 18, air gap can be utilized as far as possible
Magnetic field., i.e., can be with when presence as independent component herein it should be noted that elastic spring 12 is before completing to install
It is flat structures rather than pyramidal structure, stress deformation just turns into taper during installation.
In a kind of instantiation, conducting strip 5,6 one end are fixed on coil brace 7, respectively with two the end of a thread of coil 8
Electrical connection, for providing current signal for coil 8.Conducting strip 5,6 is flexible, and its other end is cantilever end, and cantilevered distal end exists
Two positions being separated by a certain distance to same direction bending (such as 90-degree bent), form the contact joint of U-shape structure respectively
501st, 601, as shown in Figure 3.The contact joint 501,601 is each attached in the stretching structure 202 on pump chamber 2 and stretches out the pump housing
Outside, contact external interface is provided for the electric input of diaphragm pump.It is defeated that this design can provide contact for the electric input of pump
Enter mode, facilitate the dismounting of pump, and eliminate external connecting wire or connector, save Material Cost.
In above-described embodiment, the operation principle of diaphragm pump 3 is：Coil 8 is located at magnetic conduction boots 9, permanent magnet 10 and magnetic cup combination
, will be when inputting a reverse AC signal to the coil 8 by conducting strip 5,6 in the magnetic field of air gap 18 of formation
The Ampere force of an alternation is produced on coil 8, the Ampere force of the alternation does reciprocating linear fortune via the driving diaphragm 3 of coil brace 7
It is dynamic so that the gas 20 in closed chamber on pump chamber 2 produces the positive/negative pressure of a circulation, when in closed chamber being negative pressure from
The suction nozzle suction gas of pump, gas is excluded when in closed chamber being malleation from the gas outlet of pump, so as to realize that the normal of pump is taken out
Inflate function.
Drive diaphragm to move along a straight line using the voice coil motor of compact in above-described embodiment, and eliminate turn
The transmission mechanism of motion is changed, so as to reduce the volume of diaphragm pump so that the compact of diaphragm pump is compact.Due to voice coil linear
The motor structural member without easily abrasion or tired timeliness, therefore the working life of pump will not be had undesirable effect in itself.Sound
The linear motion of circle linear electric motors output needs not move through motion conversion, can push directly on diaphragm work, without centre energy consumption.Sound
Enclose linear electric motors and staring torque problem is not present when promoting motion of membrane, therefore when less driving voltage or electric current
Also exportable power or displacement, results in the gas collected compared with low discharge.Voice coil motor is commutated by control electric current
Frequency carrys out the reciprocating frequency of controlled motor, by the reciprocating amplitude of control electric current size controlled motor, therefore can be square
Just the uninterrupted of collection is adjusted.
Diaphragm pump in above-described embodiment can be applied in gas analyzer, and gas analyzer includes diaphragm pump, for examining
The composition of tested gas and/or the gasmetry module and controller of concentration are surveyed, the air admission hole of diaphragm pump and patient respiratory are returned
Road is connected, and the venthole of diaphragm pump is connected with gasmetry module, and it is tested that controller controls diaphragm pump to be extracted from breathing circuit
Tested gas is simultaneously supplied to gasmetry module to be detected by gas.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, the protection of the present invention should be all considered as belonging to
Scope.
Claims (8)
1. a kind of diaphragm pump, it is characterised in that including：
At least one fluid access and at least one fluid are engaged in this profession；
At least one has the pump chamber of cavity；
At least one diaphragm, the diaphragm is fitted with the openend of pump chamber cavity, and closed chamber is formed between diaphragm and pump chamber, institute
State fluid access and fluid is engaged in this profession and connected with closed chamber；
At least one voice coil motor, the voice coil motor includes stator and mover, and the stator, which is produced, includes air gap
Field circuit, the mover be located at the air gap in and can be connected with diaphragm and do straight reciprocating motion with dynamic diaphragm；
The stator includes magnetic conduction boots, permanent magnet and motor magnetic cup, and the magnetic conduction boots and permanent magnet are stacked gradually installed in motor
In magnetic cup, the contact surface between contact surface and permanent magnet and motor magnetic cup between the magnetic conduction boots and permanent magnet is cone
Face；
The mover includes：
Coil, is movably positioned in the air gap；
Coil brace, for installing coil, the one end of the coil brace connects the diaphragm；
The diaphragm pump also includes the elastic spring for being used to fix the coil brace, center and the coil branch of the elastic spring
Frame is fixedly connected, and outward flange and the motor magnetic cup are fixedly connected, and the elastic spring and motor magnetic cup are towards elastic spring
It is simultaneously the consistent conical surface in direction.
2. diaphragm pump as claimed in claim 1, it is characterised in that the voice coil motor is cylinder type voice coil linear electricity
Machine.
3. diaphragm pump as claimed in claim 1, it is characterised in that the coil is exoskeletal coil.
4. diaphragm pump as claimed in claim 3, it is characterised in that the coil is mutually entwined using Self-binding cord.
5. diaphragm pump as claimed in claim 1, it is characterised in that the coil brace includes：
Coil mounting bracket, the coil mounting bracket is dish, and the coil is arranged on the edge of coil mounting bracket；
Head, it is located at the side of coil mounting bracket, and the head is connected with diaphragm；
Bar portion, its one end is fixed on the opposite side of coil mounting bracket, and the bar portion is enclosed through magnetic conduction boots, permanent magnet and motor magnetic cup
The annulus of conjunction, and the center of the other end passed and the elastic spring fixes.
6. diaphragm pump as claimed in claim 1, it is characterised in that contact surface between the magnetic conduction boots and permanent magnet and forever
The conical surface between magnet and motor magnetic cup is tilted with motor magnetic cup towards the conical surface of the one side of elastic spring for same angle.
7. diaphragm pump as claimed in claim 2, it is characterised in that the voice coil motor also includes two conducting strips, institute
State conducting strip to electrically connect with coil, each conducting strip has a contact joint being located on the outside of the diaphragm pump.
8. a kind of gas analyzer, it is characterised in that including：
Diaphragm pump as any one of claim 1-7, the diaphragm pump is used to be evacuated or inflate；
Gasmetry module, composition and/or concentration for detecting tested gas；
Controller, control diaphragm pump extracts tested gas and is supplied to gasmetry module to detect tested gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210017616.0A CN103216432B (en) | 2012-01-19 | 2012-01-19 | Diaphragm pump and gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210017616.0A CN103216432B (en) | 2012-01-19 | 2012-01-19 | Diaphragm pump and gas analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103216432A CN103216432A (en) | 2013-07-24 |
| CN103216432B true CN103216432B (en) | 2017-08-08 |
Family
ID=48814508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210017616.0A Active CN103216432B (en) | 2012-01-19 | 2012-01-19 | Diaphragm pump and gas analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103216432B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5650285A (en) * | 1979-09-29 | 1981-05-07 | Matsushita Electric Works Ltd | Air pump |
| JPS57135282A (en) * | 1981-02-14 | 1982-08-20 | Matsushita Electric Works Ltd | Movable coil type pump |
| GB9614304D0 (en) * | 1996-07-08 | 1996-09-04 | Isis Innovation | Linear compressor motor |
| IL142779A0 (en) * | 2001-04-24 | 2002-03-10 | Mnde Technologies L L C | Electromagnetic device particularly useful as a vibrator for a fluid pump |
| GB0126285D0 (en) * | 2001-11-01 | 2002-01-02 | Isis Innovation | Improved moving coil transducer |
| US20060239499A1 (en) * | 2005-04-25 | 2006-10-26 | Stiles Enrique M | Semi-radially-charged conical magnet for electromagnetic transducer |
| SE529284C2 (en) * | 2005-11-14 | 2007-06-19 | Johan Stenberg | diaphragm Pump |
| JP2007278171A (en) * | 2006-04-06 | 2007-10-25 | Shinano Kenshi Co Ltd | Solenoid and electromagnetic pump |
-
2012
- 2012-01-19 CN CN201210017616.0A patent/CN103216432B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103216432A (en) | 2013-07-24 |
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Effective date of registration: 20180807 Address after: 518057 the 1-4 floor of MINDRAY building, science and technology south twelve Road, Nanshan District high tech Industrial Park, Shenzhen, Guangdong. Co-patentee after: Shenzhen MINDRAY Technology Co., Ltd. Patentee after: Shenzhen Mairui Biotherapeutic Electronic Co., Ltd. Address before: 518057 MINDRAY science and technology south twelve road MINDRAY high tech Industrial Park, Shenzhen, Guangdong Patentee before: Shenzhen Mairui Biotherapeutic Electronic Co., Ltd. |