CN100594956C - Expiratory valve system - Google Patents
Expiratory valve system Download PDFInfo
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- CN100594956C CN100594956C CN 200710308320 CN200710308320A CN100594956C CN 100594956 C CN100594956 C CN 100594956C CN 200710308320 CN200710308320 CN 200710308320 CN 200710308320 A CN200710308320 A CN 200710308320A CN 100594956 C CN100594956 C CN 100594956C
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- outlet valve
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Abstract
The invention provides an exhalation valve system, which is mainly used as the exhalation valve system for a respirator, etc. The exhalation valve system of the invention comprises an exhalation valveand an electrically controlled regulation device, wherein, the exhalation valve comprises a valve body (1), a valve core (2) and a valve cover (4); the electrically controlled regulation device comprises: a shell body (11) which is communicated with the valve body (1), an elastic part (10) which blocks off the shell body (11) in the airtight mode, an electromagnet (7) which is fixedly connected with the shell body (11), and a push rod (8) which is fixedly connected with the electromagnet (7). The exhalation valve system adopts the mode driven by electromagnet (7) and changes the internal gaspressure of the valve core (2) by changing the volume of an inner cavity (11c) of the shell body (11), thus achieving the purpose of controlling the valve core (2) to be opened/closed; the exhalationvalve system does not need an additional gas source, the universality is good, the control sensitivity is good, the cost is lower, and the detachment and the installation are convenient for cleaning and disinfection.
Description
Technical field
The present invention relates to medical instruments field, be specifically related to such as the expiratory valve system that is used for respirator.
Background technology
In various assisted respirators (as respirator), outlet valve need be set patient's expiration is controlled, the similar of at present used outlet valve is in overflow valve, and it can close pressurize fully, also can open fully to unload and be depressed into relative pressure zero point (for example, atmospheric pressure).The safe oil pressure relief of outlet valve (opening pressure of outlet valve spool just) should be adjustable continuously, regulate control mode and mostly be electric automatic control greatly, the at present main opening pressure that adopts following dual mode to control the outlet valve spool: a kind ofly be the proportion of utilization electric magnet and then directly act on the outlet valve spool by force transmission mechanism, be applied to the opening pressure that the pressure on the spool comes regulating spool by changing electric magnet by force transmission mechanism, the size of electromagnetic force is directly proportional with the size of magnet control electric current, just can obtain different outlet valve spool opening pressures by the size of continuously regulating the control electric current; Another kind is to utilize external air source (for example, the respirator source of the gas) compressed air that provides drives the outlet valve spool, utilize pressure proportioning valve to regulate compressed-air actuated pressure continuously, thereby the change compressed air is applied to the pressure on the outlet valve spool, thereby also can obtain continuously adjustable spool opening pressure.
But, all there is corresponding shortcoming in above-mentioned two kinds of regulative modes: on the one hand, because outlet valve needs frequent dismounting to carry out cleaning and sterilizing, so the mode of utilizing electric magnet and force transmission mechanism to regulate just requires the machining accuracy of each power transmission parts very high, and the assembly precision in later stage also should be very high, could guarantee that outlet valve has enough control accuracies and sensitivity, its reliability can be different because of operator; On the other hand, the mode of utilizing compressed air to regulate requires the source of the gas that continues, and its scope of application be very limited (promptly can only use can providing on the device that continues source of the gas, if electric pulmotor just can't have been used) is provided for this.In addition, above-mentioned two kinds of control modes realize that accordingly cost is all higher.
Therefore, need a kind of outlet valve, it adopts brand-new mode to control the unlatching/sealing of spool at the problems referred to above, need not extra source of the gas, its implementation is simple, and versatility is good, and control sensitivity is good, and cost is lower, can remove and install easily and cleaning and sterilizing.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of improved expiratory valve system, and it utilizes brand-new mode to control.
At the problems referred to above, according to the invention provides a kind of expiratory valve system, it comprises valve body, spool and valve gap, it is characterized in that also comprising automatically controlled adjusting device: this automatically controlled adjusting device comprises: the housing that communicates with valve body; Elastic component with gastight mode shutoff housing.
Preferably, according to expiratory valve system of the present invention, wherein automatically controlled adjusting device further comprises: the electric magnet that connects firmly with housing; The push rod that connects firmly with electric magnet; And the spring between elastic component and push rod, and has the initial compression amount.
Preferably, according to expiratory valve system of the present invention, wherein the edge of shell nozzle is formed with flange, and the edge of elastic component is embedded in this flange.
Preferably, according to expiratory valve system of the present invention, wherein be formed with top cover on the electric magnet, electric magnet is connected in housing by top cover, and this top cover roof pressure elastic component.
Preferably, according to expiratory valve system of the present invention, further comprise connecting pipe and check valve, wherein: an end of connecting pipe is connected in housing; The other end of connecting pipe is divided into two branch roads: wherein first branch road is connected in check valve, and second branch road is connected in valve body.
Particularly, according to expiratory valve system of the present invention, wherein check valve communicates with ambient atmosphere.
Preferably, according to expiratory valve system of the present invention, wherein spool is the hollow disc shape, and its center is formed with opening.
Preferably, according to expiratory valve system of the present invention, wherein spool is made by silica gel.
Preferably, according to expiratory valve system of the present invention, its middle shell is a minitype cylinder, and elastic component is a thin film.
The present invention has following technique effect:
First, according to expiratory valve system of the present invention, employing (for example is enclosed in hermetic container, cylinder) gas of Nei certain volume is controlled the unlatching and the sealing of outlet valve, and regulate critical unlatching/confining pressure continuously, this brand-new control mode need not extra source of the gas, thereby can be applicable to the assisted respirator that source of the gas is not provided such as electric pulmotor etc., and versatility is higher;
Second, automatically controlled adjusting device according to expiratory valve system of the present invention, utilize electric magnet that the pressure of cylinder interior control gas is regulated, and utilize check valve to guarantee accurate pressure zero point, make after the each disassembly, cleaning of outlet valve, thin film can be returned to the normal position, therefore has very high control sensitivity and degree of accuracy;
The 3rd, have spring in the automatically controlled adjusting device according to expiratory valve system of the present invention, it has been located outside the power transmission, and the controlled pressure that can also produce being leaked by possible gas descends and carries out adaptive equalization, thereby guarantees the whole system operation precision.
Should be appreciated that above generality is described and the following detailed description is all enumerated and illustrative, purpose is for to the claimed further instruction that the invention provides.
Description of drawings
Accompanying drawing constitutes the part of this description, is used to help further understand the present invention.These accompanying drawings illustrate some embodiments of the present invention, and are used for illustrating principle of the present invention with description.Identical in the accompanying drawings parts are represented with identical label.Wherein:
Fig. 1 is the structural representation of outlet valve according to the preferred embodiment of the invention.
The specific embodiment
With reference to the accompanying drawings, the specific embodiment of the present invention is described.
Fig. 1 has shown the structural representation of outlet valve according to the preferred embodiment of the invention.As seen from Figure 1, the outlet valve of this preferred embodiment comprises as the lower part: valve body 1, spool 2, valve gap 4, automatically controlled adjusting device, check valve 5 and connecting pipe 12.Spool 2 is installed in the valve body 1, utilizes valve gap 4 that spool 2 is fixed in the valve body 1, and preferably, is provided with sealing gasket 3 to guarantee the air-tightness between the two between spool 2 and valve gap 4; The center of spool 2 is formed with opening 2a, and the centre bore of this opening 2a and sealing gasket 3 is relative with the through hole 4a at valve gap 4 tops, and the air flue 4b in the valve gap 4 are communicated with the through hole 4a at its top.Valve body 1 has expiration valve port 1c, and spool 2 can seal presses this expiration valve port 1c, also has air flue 1d in the valve body 1, and the internal diameter of this air flue 1d is corresponding with internal diameter and the horizontal level of air flue 4b in the valve gap 4 with horizontal level.
Check valve 5 can keep being communicated with external environment 6, after being used to guarantee that cylinder 11 resets, the gas and the external atmosphere pressure dynamic balance of sealing in the cylinder 11, thereby after making that spool 2 is cleaned in each dismounting, thin film 10 and spool 2 can both normally reset, the control electric current and corresponding PEEP (Positive End-ExpiratoryPressure, the end-tidal positive air pressure) value that so just guarantee electric magnet 7 can not change.
Above-mentioned spool (2) is preferably made by the medical silica-gel of thickness 1mm, and it is thin discoid to be hollow, its volumetric expansion when inflation, and volume dwindles thereupon during the venting release.
Continuation is with reference to Fig. 1, and the concrete formation of the automatically controlled adjusting device of outlet valve according to the preferred embodiment of the invention is described in detail, and this automatically controlled adjusting device has adopted the opening pressure of brand-new mode regulating and controlling outlet valve.Preferably, automatically controlled adjusting device according to the present invention specifically comprises: electric magnet 7, push rod 8, spring 9, thin film 10 (elastic component) and cylinder 11.Thin film 10 and cylinder 11 are used to seal control gas to regulate the unlatching and the sealing of outlet valve, cylinder 11 preferably forms bowl-type, its edge of opening is formed with flange 11a, thin film 10 just is embedded in this flange 11a, thereby the opening of shutoff cylinder 11 has just sealed a certain amount of control gas like this in cylinder (11); And the top of cylinder 11 (the bowl end of bowl-type just) is formed with through hole 11b, and connecting pipe 12 is communicated with cylinder (11) by this through hole 11b.It should be noted that cylinder 11 according to the present invention is minitype cylinder, its volume is very little with respect to common cylinder, and adopting this minitype cylinder mainly is to be determined by its practical application area decision and the purpose of required realization.Electric magnet 7 is used for producing the electromagnetic force that promotes thin film (10) motion, and it links to each other with the external power source (not shown), and electric magnet 7 has top cover 7a according to the preferred embodiment of the invention, utilizes being connected of top cover 7a and flange 11a that electric magnet 7 and cylinder 11 are coupled together; In addition, also have the magnetic core (not shown) that can move up and down in the electric magnet 7, push rod 8 fixedly is connected on this magnetic core, and push rod 8 just can be along with magnetic core moves up and down like this.Spring 9 is arranged between push rod 8 and the thin film 10, and has the initial compression amount, and here spring 9 also is used to compensate the slight leakage of the control gas in the cylinder 11 on the other hand on the one hand as force transfer element.
Above the concrete structure and the composition mode of outlet valve are according to the preferred embodiment of the invention described in detail, will be continued to illustrate the operation principle of this outlet valve below with reference to Fig. 1.
Outlet valve is to be used to control the device that the patient exhales, and the patient just can exhale by outlet valve when it is opened, otherwise the patient is just air-breathing when it seals.The sealing of outlet valve and unlatching are by the gas pressure control that is applied to spool 2 both sides, one side of spool 2 is subjected to the pressure from patient airway, opposite side is subjected to from spool 2 pressure inside, outlet valve just is in critical sealing/opening when the pressure at both sides balance, the pressure of this moment is exactly the opening pressure of outlet valve, and this opening pressure just can be controlled by automatically controlled adjusting device.The electromagnetic force size that electric magnet 7 produces is directly proportional with the control electric current of input, can draw the control electric current of electric magnet 7 and the relation curve of output electromagnetic force by the size of mensuration control electric current and the electromagnetic force size of electric magnet 7 outputs, again by cylinder 11 lifting surface areas, can converse the control electric current of electric magnet 7 and the relation curve of cylinder 11 internal gas pressure, control the pressure that electric current just can change cylinder 11 internal control gases by changing like this, thereby change the critical sealing/opening pressure of outlet valve.
When needs of patients is air-breathing, to electric magnet 7 input maximum controlling current, thereby producing maximum electromagnetic force moves upward to promote push rod 8, thereby drive power transmission spring 9 and upwards promote thin film 10, the enclosed space that is formed by thin film 10 and cylinder 11 just reduces like this, thereby control gas pressure is wherein increased, because spool 2 communicates with cylinder 11, the air pressure of spool 2 inside increases thereupon like this, silica gel spool 2 will expand and push the expiration valve port 1c of valve body 1, because the air pressure of spool 2 inside greater than the pressure of patient airway, is therefore exhaled valve port 1c just by firm having blocked.At this moment the patient is undertaken air-breathing by outside assisted respirator (for example, respirator).When air-breathing end, the patient begins to exhale, external circuit can be according to will control the electric current downward modulation at the predefined end-tidal PEEP value of different patients, electromagnetic force also reduces thereupon like this, the power that applies on the thin film 10 also reduces, then thin film 10 is with regard to resilience reset (being exactly downward resilience as shown in the figure), thereby make that the control gas pressure of sealing reduces in the cylinder 11, and then spool 2 releases are shunk, because less than the pressure of patient airway, then spool 2 will leave expiration valve port 1c to spool 2 pressure inside at this moment, outlet valve is opened, the patient begins to exhale, and expiratory airflow flows out from the expiration pipe interface via expiration valve port 1c.When the pressure of patient airway drops to the spool 2 pressure inside pressure of cylinder 11 inner control gases (just this moment) balance, outlet valve cuts out, keep end expiratory positive pressure (at the PEEP value of patient's setting), at this moment outlet valve has just been got back to critical state again.
Should note, when if the pressure in the patient airway has surpassed the safe pressure of setting when air-breathing for some reason, the electric current of rapid tripping magnet 7, thereby the no longer stressed resilience rapidly of thin film 10 resets, spool 2 pressure inside descend rapidly thereupon, spool 2 contractions are also left expiration valve port 1c, outlet valve complete opening release this moment.
In addition, at different needs of patients the critical unlatching/confining pressure of outlet valve is mediated, this still realizes by automatically controlled adjusting device of the present invention.Critical unlatching/the confining pressure of higher if desired outlet valve, just increase the control electric current that inputs to electric magnet 7, the electromagnetic force that produces increases, thereby the control gas pressure in the cylinder 11 is increased, spool 2 pressure inside also increase like this, and it is higher to make outlet valve reach the patient airway internal pressure of critical state like this.Otherwise,, then will control electric current accordingly and reduce just passable if the critical unlatching/confining pressure of required outlet valve is less.
Above-mentioned is exactly the operation principle and the regulative mode of outlet valve according to the preferred embodiment of the invention.After outlet valve uses a period of time or at different patients, need be with its disassembly, cleaning, need after re-assemblying the pressure of the control gas in the cylinder 11 is proofreaied and correct, make itself and atmospheric pressure be consistent (this be by the instructions for use of outlet valve decision), thereby make thin film 10 be returned to normal initial position, this just realizes by above-mentioned check valve 5.And the pressure of cylinder 11 internal control gases and the difference of external atmosphere pressure have reached certain marginal value, thereby check valve 5 will be opened and makes the pressure of cylinder 11 inner control gases be returned to atmospheric pressure.So just can guarantee that whole respiratory system has higher operating accuracy.
In addition, further the compensating action of above-mentioned spring 9 is described.Because the control gas in the cylinder 11 can have micro-leakage along with use, the pressure of cylinder 11 inner control gases will reduce slightly like this, at this moment import same electric current and just can not in spool 2, obtain same pressure, so utilize the adaptive ability of spring 9 just can compensate the pressure of this excalation, thereby guarantee the precision of outlet valve.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an outlet valve comprises valve body (1), spool (2) and valve gap (4), it is characterized in that also comprising automatically controlled adjusting device, and described automatically controlled adjusting device comprises:
Housing (11) communicates with the spool (2) of described valve body (1);
Elastic component (10) is with the described housing of gastight mode shutoff (11), with at a certain amount of control gas of housing (11) inner sealing;
Electric magnet (7) connects firmly with described housing (11);
Push rod (8), the magnetic core that can move up and down interior with described electric magnet (7) connects firmly; With
Spring (9) is positioned between described elastic component (10) and the described push rod (8), and has the initial compression amount.
2. outlet valve according to claim 1, the edge of wherein said housing (11) opening is formed with flange (11a), and the edge of described elastic component (10) is embedded in described flange.
3. outlet valve according to claim 1 is formed with top cover (7a) on the wherein said electric magnet (7), described electric magnet (7) is connected in described housing (11) by described top cover (7a), and the described elastic component of described top cover (7a) roof pressure (10).
4. outlet valve according to claim 1 further comprises connecting pipe (12) and check valve (5), and wherein: an end of described connecting pipe (12) is connected in described housing (11); The other end of described connecting pipe (12) is divided into two branch roads: wherein first branch road (12a) is connected in described check valve (5), and second branch road (12b) is connected in described valve body (1).
5. outlet valve according to claim 4, wherein said check valve (5) communicates with ambient atmosphere.
6. outlet valve according to claim 5, wherein said spool (2) is the hollow disc shape, and its center is formed with opening.
7. outlet valve according to claim 5, wherein said spool (2) is made by silica gel.
8. outlet valve according to claim 1, wherein said housing (11) is a minitype cylinder, described elastic component (10) is a thin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710308320 CN100594956C (en) | 2007-12-29 | 2007-12-29 | Expiratory valve system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710308320 CN100594956C (en) | 2007-12-29 | 2007-12-29 | Expiratory valve system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101310791A CN101310791A (en) | 2008-11-26 |
| CN100594956C true CN100594956C (en) | 2010-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710308320 Active CN100594956C (en) | 2007-12-29 | 2007-12-29 | Expiratory valve system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100594956C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101757707B (en) * | 2008-12-08 | 2014-06-11 | 北京谊安医疗系统股份有限公司 | Method for controlling end-expiratory pressure and ventilator using same |
| CN101766858B (en) * | 2008-12-30 | 2014-08-06 | 北京谊安医疗系统股份有限公司 | Method of expiration control |
| CN101716390B (en) * | 2009-11-11 | 2012-05-30 | 广州医学院荔湾医院 | Self-service respiration caccule and self-service power-driven respiration system |
| CN103920220B (en) * | 2013-01-10 | 2016-10-05 | 北京谊安医疗系统股份有限公司 | Outlet valve |
| CN104225756A (en) * | 2013-06-14 | 2014-12-24 | 北京谊安医疗系统股份有限公司 | Exhalation valve |
| CN105617527B (en) * | 2014-11-06 | 2020-06-02 | 深圳迈瑞生物医疗电子股份有限公司 | Safety valve and breathing machine |
| CN107551367B (en) * | 2017-10-19 | 2020-12-01 | 江苏泰德医药有限公司 | A detachable medical air compression atomizer for respiratory disease |
| CN117205080A (en) * | 2023-11-07 | 2023-12-12 | 德宝恒生科技服务有限公司 | Dispensing device, gas storage method, and gas dispensing method |
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2007
- 2007-12-29 CN CN 200710308320 patent/CN100594956C/en active Active
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| Publication number | Publication date |
|---|---|
| CN101310791A (en) | 2008-11-26 |
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