CN203323805U - Airflow meter and medical device with airflow meter - Google Patents
Airflow meter and medical device with airflow meter Download PDFInfo
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- CN203323805U CN203323805U CN2013203289156U CN201320328915U CN203323805U CN 203323805 U CN203323805 U CN 203323805U CN 2013203289156 U CN2013203289156 U CN 2013203289156U CN 201320328915 U CN201320328915 U CN 201320328915U CN 203323805 U CN203323805 U CN 203323805U
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Abstract
The utility model discloses an airflow meter and a medical device with the airflow meter. The airflow meter comprises a cavity body, a magnetic throttling component, a magnetic component and a differential-pressure flow sensor, wherein an airflow cavity is arranged in the cavity body; the magnetic throttling component is arranged in the airflow cavity and is provided with a throttling hole with variable cross section area; the magnetic component is arranged on the cavity body and is close to the magnetic throttling component, the cross section area of the throttling hole is changeless under the action of the magnetic component when the quantity of airflow passing through the magnetic throttling component is smaller than or equal to a preset value, and the cross section area of the throttling hole is increased under the action of air passing through the magnetic throttling component when the quantity of the airflow passing through the magnetic throttling component is larger than the preset value; the differential-pressure flow sensor is used for detecting pressure difference of the two sides of the magnetic throttling component in the airflow cavity and calculating the quantity of the airflow passing through the airflow cavity according to the pressure difference. According to the embodiment of the utility model, the airflow meter has the advantages of high measurement precision, stability in measurement under small quantity of the airflow, capability of providing safe and stable small airflow and the like.
Description
Technical field
The utility model relates to medical field, in particular to a kind of gas meter and the Medical Devices with described gas meter
Background technology
In existing lung ventilator, Anesthesia machine, for the flow to the ventilation air-flow, measured, often adopt gas meter.Gas meter comprises isometrical flowmeter and reducing flowmeter.Wherein the reducing flowmeter is comprised of restriction device, sample lines and differential pressure flow sensor.Restriction device is normally placed in the pipeline that gas flows through, and makes pipeline form the effect of local contraction, and air-flow pressure decreased after flowing through the pipeline of contraction, thereby produce pressure differential in the upstream and downstream of this restriction device.Differential pressure flow sensor is communicated with respectively the upstream and downstream at restriction device through two force samples pipelines, forms bypass, and passes through collected pressure differential and the gas flow of senses flow in by the road.Restriction device is provided with throttle orifice (reducing diaphragm), and the sectional area of throttle orifice increases along with the increase of the gas flow through restriction device, realizes the reducing effect.
Yet, existing reducing gas meter is because the air-flow of the flowmeter of flowing through is not generally stable state, can cause the shake of reducing diaphragm, and when low discharge, especially during the flow below 1L/min, the shake of diaphragm is larger on the flow measurement impact, and makes extra small flow measurement inaccurate, when using lung ventilator, Anesthesia machine, brings uncomfortable degree or risk to the infant.
The utility model content
The utility model is intended at least solve one of technical matters existed in prior art.For this reason, a purpose of the present utility model be to propose a kind of measuring accuracy high, under more stingy flow Measurement sensibility, the gas meter of safety, stable stingy flow can be provided.
Another purpose of the present utility model is to propose a kind of Medical Devices with described gas meter.
For achieving the above object, first aspect of the present utility model proposes a kind of gas meter, and described gas meter comprises: cavity, there is air flow chamber in described cavity, and described cavity is provided with import and the outlet be communicated with described air flow chamber; The magnetic throttling element, described magnetic throttling element is located in described air flow chamber and, between described import and described outlet, described magnetic throttling element is provided with the variable throttle orifice of cross-sectional area; Magnetic part, described magnetic part is located on described cavity and contiguous described magnetic throttling element setting, when the gas flow through described magnetic throttling element is less than or equal to predetermined value, under the effect of cross-sectional area at described magnetic part of described throttle orifice, remain unchanged, when the gas flow through described magnetic throttling element is greater than described predetermined value, the cross-sectional area of described throttle orifice increases under the effect of the gas through described magnetic throttling element; Calculate the differential pressure flow sensor through the gas flow of described air flow chamber with pressure differential for detection of described magnetic throttling element both sides in described air flow chamber and according to described pressure differential.
There is the described magnetic throttling element of the variable described throttle orifice of cross-sectional area by setting according to gas meter of the present utility model, can guarantee that described gas meter is at gas flow hour, enough large pressure reduction can be detected from the both sides of described magnetic throttling element, and reach than high measurement accuracy, also guaranteed when gas flow increases, the pressure reduction of the both sides of described magnetic throttling element can not increase to rapidly the full scale of described differential pressure flow sensor and cause and can't measure, can when gas flow is larger, not enlarge markedly the resistance of gas flow simultaneously, guaranteed the comfort level that the patient exhales.And, described cavity is provided with the described magnetic part of contiguous described magnetic throttling element, like this can in the situation that more stingy flow by utilizing described magnetic part to guarantee that to the magnetic force of described magnetic throttling element described magnetic throttling element do not shake, the cross-sectional area of described throttle orifice is remained unchanged, be affected to avoid measurement result.Particularly, when the airshed through described stream chamber is less than described predetermined value (as 0-5L), because described magnetic throttling element is subject to the suction of described magnetic part, air-flow is through described magnetic throttling element the time, need to first overcome the magnetic force of described magnetic part, the pressure differential of described magnetic throttling element both sides is less than the magnetic force between described magnetic part and described magnetic throttling element, described magnetic throttling element is motionless, the cross-sectional area of described throttle orifice remains unchanged to avoid described magnetic throttling element shake on measuring the impact of structure, described gas meter is equivalent to isometrical flowmeter to be used.When the airshed through described air flow chamber is greater than described predetermined value, the pressure reduction of described magnetic throttling element both sides increases, the described throttle orifice of described magnetic throttling element opens mouth along the airflow direction distortion, now because gas flow is large, pressure reduction is larger, the shake of described magnetic throttling element is little on the measurement result impact, can ignore, indirectly realize current stabilization, reach the effect of stably measured.Can realize the stably measured result thus, guarantee that the infant is when using lung ventilator, Anesthesia machine, safety, stable stingy flow can be provided, to improve infant's comfort level and reduce risk when using lung ventilator, Anesthesia machine.Therefore, according to gas meter of the present utility model have measuring accuracy high, under more stingy flow Measurement sensibility, safety, stable advantages such as stingy flow can be provided.
In addition, also there is following additional technical feature according to gas meter of the present utility model:
Described magnetic throttling element comprises fixed part and swing part, and described fixed part is provided with through hole, and described swing part is located in described through hole swingably, forms the variable described throttle orifice of cross-sectional area between the periphery wall of described swing part and the internal perisporium of described through hole.The cross-sectional area that can realize thus described throttle orifice increases with the increase of the airshed of process, and simple in structure, the dependable performance of described magnetic throttling element.
Described magnetic throttling element also comprises elastic joint part, and the upper end of described swing part is connected with the upper wall of described through hole by described elastic joint part, described magnetic part be positioned at described magnetic throttling element under.So not only described swing part can be connected on described fixed part more easily, and can so that described magnetic part remains on state of nature by described swing part, to take the cross-sectional area that keeps described throttle orifice be state of nature.
The magnetism intensity of described magnetic part is 2400 Gausses, and the distance between described magnetic part and described magnetic throttling element is 2 millimeters.Can make thus the performance of described gas meter more reliable.
Described fixed part, described swing part and described elastic joint part are integrally formed.
Described magnetic throttling element is made by the magnetic stainless steel of tool.Can make so described magnetic throttling element there is good rebound resilience and toughness, and non-corrosive is to guarantee clean, the health of described gas meter.
Described differential pressure flow sensor detects the pressure differential of described magnetic throttling element both sides in described air flow chamber by two sampling pipes.Can make thus described differential pressure flow sensor detect more easily the gas flow through described air flow chamber.
Described cavity comprises the sub-cavity of air inlet and the sub-cavity of giving vent to anger, the sub-cavity of described air inlet is connected with the described sub-cavity of giving vent to anger and the sub-cavity of described air inlet and the described sub-cavity of giving vent to anger limit described air flow chamber jointly, described magnetic throttling element is clamped in the sub-cavity of described air inlet and described giving vent to anger between sub-cavity, described import is located on the sub-cavity of described air inlet, and described outlet is located on the described sub-cavity of giving vent to anger.Can make like this production of described gas meter convenient.
The sub-cavity of described air inlet and described giving vent to anger between sub-cavity are provided with the O-ring seal in the gap for sealing the sub-cavity of described air inlet and the described sub-cavity junction of giving vent to anger.Can further improve the accuracy of the measurement of described gas meter like this.
Second aspect of the present utility model proposes a kind of Medical Devices, and described Medical Devices comprise according to the described gas meter of first aspect of the present utility model.
, have and measure accurately, safe, comfortableness advantages of higher by utilizing according to the described gas meter of first aspect of the present utility model according to gas meter of the present utility model.
Additional aspect of the present utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
The accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the cut-open view according to the gas meter of the utility model embodiment;
Fig. 2 is the structural representation according to the gas meter of the utility model embodiment;
Fig. 3 is the concrete measuring flow differential pressure curve according to the gas meter of the utility model embodiment.
Gas meter 1, cavity 100, air flow chamber 110, import 111, export 112, the sub-cavity 120 of air inlet, give vent to anger sub-cavity 130, magnetic throttling element 200, throttle orifice 210, fixed part 220, swing part 230, magnetic part 300, sampling pipe 400, O-ring seal 500.
Embodiment
Below describe embodiment of the present utility model in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " vertically ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " be only for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, except as otherwise noted, the implication of " a plurality of " is two or more.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be done broad understanding, for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also to be electrically connected to; Can be directly to be connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.
Below with reference to Fig. 1-Fig. 3, the gas meter 1 according to the utility model embodiment is described.As shown in Figure 1-Figure 3, comprise cavity 100, magnetic throttling element 200, magnetic part 300 and differential pressure flow sensor (not shown) according to the gas meter 1 of the utility model embodiment.
Have air flow chamber 110 in cavity 100, cavity 100 is provided with import 111 and the outlet 112 be communicated with air flow chamber 110.Magnetic throttling element 200 is made by the magnetic material of tool or the material that is endowed magnetic.Magnetic throttling element 200 be located in air flow chamber 110 and magnetic throttling element 200 in import 111 with export between 112, magnetic throttling element 200 is provided with the variable throttle orifice of cross-sectional area 210, the cross-sectional area of throttle orifice 210 is less than the cross-sectional area of air flow chamber 110.Magnetic part 300 is located on cavity 100 and the contiguous magnetic throttling element 200 of magnetic part 300 arranges, when the gas flow through magnetic throttling element 200 is less than or equal to predetermined value, the cross-sectional area of throttle orifice 210 remains unchanged under the effect of magnetic part 300, and when the gas flow through magnetic throttling element 200 is greater than described predetermined value, the cross-sectional area of throttle orifice 210 increases under the effect of the gas through magnetic throttling element 200.Described differential pressure flow sensor is for detection of the pressure differential of the interior magnetic throttling element of air flow chamber 110 200 both sides and calculate the gas flow through air flow chamber 110 according to described pressure differential.
There is the magnetic throttling element 200 of the variable throttle orifice of cross-sectional area 210 by setting according to the gas meter 1 of the utility model embodiment, can guarantee that gas meter 1 is at gas flow hour, enough large pressure reduction can be detected from the both sides of magnetic throttling element 200, and reach than high measurement accuracy, also guaranteed when gas flow increases, the pressure reduction of the both sides of magnetic throttling element 200 can not increase to rapidly the full scale of described differential pressure flow sensor and cause and can't measure, can when gas flow is larger, not enlarge markedly the resistance of gas flow simultaneously, guaranteed the comfort level that the patient exhales.And, cavity 100 is provided with the magnetic part 300 of contiguous magnetic throttling element 200, like this can be in the situation that more stingy flow guarantees that by the magnetic force that utilizes 300 pairs of magnetic throttling elements 200 of magnetic part magnetic throttling element 200 do not shake, the cross-sectional area of throttle orifice 210 is remained unchanged, be affected to avoid measurement result.Particularly, when the airshed through air flow chamber 110 is less than described predetermined value (as 0-5L), because magnetic throttling element 200 is subject to the suction of magnetic part 300, air-flow is through magnetic throttling element 200 time, need to first overcome the magnetic force of magnetic part 300, the pressure differential of magnetic throttling element 200 both sides is less than the magnetic force between magnetic part 300 and magnetic throttling element 200, magnetic throttling element 200 is motionless, the cross-sectional area of throttle orifice 210 remains unchanged to avoid 200 shakes of magnetic throttling element on measuring the impact of structure, and gas meter 1 is equivalent to isometrical flowmeter to be used.When the airshed through air flow chamber 110 is greater than described predetermined value, the pressure reduction of magnetic throttling element 200 both sides increases, the throttle orifice 210 of magnetic throttling element 200 opens mouth along the airflow direction distortion, now because gas flow is large, pressure reduction is larger, the shake of magnetic throttling element 200 is little on the measurement result impact, can ignore, indirectly realize current stabilization, reach the effect of stably measured.The curve of flow pressure drop figure of the concrete measurement of gas meter 1 has been shown in Fig. 3, in figure, can see, the curve rounding off, fluctuate less, can realize the stably measured result thus, guarantee that the infant is when using lung ventilator, Anesthesia machine, safety, stable stingy flow can be provided, to improve infant's comfort level and reduce risk when using lung ventilator, Anesthesia machine.Therefore, according to the gas meter 1 of the utility model embodiment have measuring accuracy high, under more stingy flow Measurement sensibility, safety, stable advantages such as stingy flow can be provided.
Particularly, the magnetism intensity of magnetic part 300 can be 2400G(Gauss), the distance between magnetic part 300 and magnetic throttling element 200 can be 2 millimeters.The magnetic force that can guarantee like this magnetic part 300 can remain on state of nature by magnetic throttling element 200, and the cross-sectional area that can keep throttle orifice 210 is the cross-sectional area under state of nature.Can make thus the performance of gas meter 1 more reliable.
Wherein, magnetic throttling element 200 can be made by the magnetic stainless steel of tool.Can make like this magnetic throttling element 200 there is good rebound resilience and toughness, and non-corrosive is to guarantee clean, the health of gas meter 1.
Fig. 1 and Fig. 2 have used the gas meter 1 according to a specific embodiment of the utility model.As depicted in figs. 1 and 2, magnetic throttling element 200 can comprise fixed part 220 and swing part 230, can be provided with through hole on fixed part 220, swing part 230 can be located in described through hole swingably, and can form the variable throttle orifice 210(of cross-sectional area between the periphery wall of swing part 230 and the internal perisporium of described through hole is the white portion of the interior annular of black part in Fig. 2).That is to say the part that throttle orifice 210 is described through hole.When air-flow process magnetic throttling element 200 and airshed are greater than described predetermined value, air-flow promotes swing part 230 and swings along airflow direction, and swing part 230 lifts, and the part that described through hole is opened increases, and the cross-sectional area of throttle orifice 210 increases.The cross-sectional area that can realize thus throttle orifice 210 increases with the increase of the airshed of process, and simple in structure, the dependable performance of magnetic throttling element 200.
Alternatively, magnetic throttling element 200 can also comprise that elastic joint part (blocks owing to being sampled pipe 400 in Fig. 2, therefore not shown), the upper end of swing part 230 can be connected with the upper wall of described through hole by described elastic joint part, and the upper end of swing part 230 can be connected with fixed part 220 by described elastic joint part.Magnetic part 300 can be positioned at magnetic throttling element 200 under.So not only swing part 230 can be connected on fixed part 220 more easily, and can make the magnetic force of 300 pairs of swing parts 230 of magnetic part consistent with the gravity direction of swing part 230.That is to say, can take that to keep the cross-sectional area of throttle orifice 210 be state of nature so that magnetic part 300 remains on state of nature by swing part 230.
Advantageously, fixed part 220, swing part 230 and described elastic joint part can be integrally formed.So not only can add the intensity of ferromagnetism throttling element 200, and can simplify the production technology of magnetic throttling element 200, thereby can reduce the production cost of magnetic throttling element 200.
Fig. 1 and Fig. 2 show the gas meter 1 according to a concrete example of the utility model.As depicted in figs. 1 and 2, described differential pressure flow sensor can detect by two sampling pipes 400 pressure differential of the interior magnetic throttling element of air flow chamber 110 200 both sides.Particularly, sampling pipe 400 can be two, one end of a sampling pipe 400 can be communicated with the part of the side that is positioned at magnetic throttling element 200 of air flow chamber 110 and the other end can be connected with described differential pressure flow sensor, and another sampling pipe 400 can be connected with described differential pressure flow sensor with part connection and the other end of the opposite side that is positioned at magnetic throttling element 200 of air flow chamber 110.Described differential pressure flow sensor can detect respectively by two sampling pipes 400 pressure differential of magnetic throttling element 200 both sides, and calculates the gas flow through air flow chamber 110 according to pressure difference meter.That is to say, can make described differential pressure flow sensor detect more easily the gas flow through air flow chamber 110.
Alternatively, as shown in Figure 1, cavity 100 can comprise the sub-cavity 120 of air inlet and the sub-cavity 130 of giving vent to anger, the sub-cavity 120 of air inlet can be connected with the sub-cavity 130 of giving vent to anger and the sub-cavity 120 of air inlet can limit air flow chamber 110 jointly with the sub-cavity 130 of giving vent to anger, magnetic throttling element 200 can be clamped in the sub-cavity 120 of air inlet and give vent to anger between sub-cavity 130, import 111 can be located on the sub-cavity 120 of air inlet, exports 112 and can be located on the sub-cavity 130 of giving vent to anger.Particularly, magnetic throttling element 200 can be bonded in the sub-cavity 120 of air inlet and give vent to anger between sub-cavity 130, and two sampling pipes 400 can be located at respectively on the sub-cavity 120 of air inlet and the sub-cavity 130 of giving vent to anger.Thus can be so that magnetic throttling element 200 be installed, can be so that the production of gas meter 1 be convenient.
Effectively, as shown in Figure 1, the sub-cavity 120 of air inlet and giving vent to anger between sub-cavity 130 can be provided with the O-ring seal 500 in the gap for sealing the sub-cavity 120 of air inlet and sub-cavity 130 junctions of giving vent to anger.Can improve the sealing of cavity 100 thus, prevent that gas from spilling from the sub-cavity 120 of air inlet and the gap of giving vent to anger between sub-cavity 130, thereby can further improve the accuracy of the measurement of gas meter 1.
The Medical Devices according to the utility model embodiment are described below, and described Medical Devices comprise the gas meter 1 according to the utility model above-described embodiment.
Pass through to utilize the gas meter 1 according to the utility model above-described embodiment according to the gas meter 1 of the utility model embodiment, have and measure accurately, safe, comfortableness advantages of higher.
Particularly, described Medical Devices can be lung ventilator and Anesthesia machine etc.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present utility model and aim can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claim and equivalent thereof.
Claims (10)
1. a gas meter, is characterized in that, comprising:
Cavity, have air flow chamber in described cavity, and described cavity is provided with import and the outlet be communicated with described air flow chamber;
The magnetic throttling element, described magnetic throttling element is located in described air flow chamber and, between described import and described outlet, described magnetic throttling element is provided with the variable throttle orifice of cross-sectional area;
Magnetic part, described magnetic part is located on described cavity and contiguous described magnetic throttling element setting, when the gas flow through described magnetic throttling element is less than or equal to predetermined value, under the effect of cross-sectional area at described magnetic part of described throttle orifice, remain unchanged, when the gas flow through described magnetic throttling element is greater than described predetermined value, the cross-sectional area of described throttle orifice increases under the effect of the gas through described magnetic throttling element; With
Calculate the differential pressure flow sensor through the gas flow of described air flow chamber for detection of the pressure differential of described magnetic throttling element both sides in described air flow chamber and according to described pressure differential.
2. gas meter according to claim 1, it is characterized in that, described magnetic throttling element comprises fixed part and swing part, described fixed part is provided with through hole, described swing part is located in described through hole swingably, forms the variable described throttle orifice of cross-sectional area between the periphery wall of described swing part and the internal perisporium of described through hole.
3. gas meter according to claim 2, it is characterized in that, described magnetic throttling element also comprises elastic joint part, and the upper end of described swing part is connected with the upper wall of described through hole by described elastic joint part, described magnetic part be positioned at described magnetic throttling element under.
4. gas meter according to claim 3, is characterized in that, the magnetism intensity of described magnetic part is 2400 Gausses, and the distance between described magnetic part and described magnetic throttling element is 2 millimeters.
5. gas meter according to claim 3, is characterized in that, described fixed part, described swing part and described elastic joint part are integrally formed.
6. gas meter according to claim 5, is characterized in that, described magnetic throttling element is made by the magnetic stainless steel of tool.
7. gas meter according to claim 1, is characterized in that, described differential pressure flow sensor detects the pressure differential of described magnetic throttling element both sides in described air flow chamber by two sampling pipes.
8. gas meter according to claim 1, it is characterized in that, described cavity comprises the sub-cavity of air inlet and the sub-cavity of giving vent to anger, the sub-cavity of described air inlet is connected with the described sub-cavity of giving vent to anger and the sub-cavity of described air inlet and the described sub-cavity of giving vent to anger limit described air flow chamber jointly, described magnetic throttling element is clamped in the sub-cavity of described air inlet and described giving vent to anger between sub-cavity, described import is located on the sub-cavity of described air inlet, and described outlet is located on the described sub-cavity of giving vent to anger.
9. gas meter according to claim 8, is characterized in that, the sub-cavity of described air inlet and described giving vent to anger between sub-cavity are provided with the O-ring seal in the gap for sealing the sub-cavity of described air inlet and the described sub-cavity junction of giving vent to anger.
10. Medical Devices, is characterized in that, comprises according to the described gas meter of any one in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203289156U CN203323805U (en) | 2013-06-07 | 2013-06-07 | Airflow meter and medical device with airflow meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203289156U CN203323805U (en) | 2013-06-07 | 2013-06-07 | Airflow meter and medical device with airflow meter |
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| CN203323805U true CN203323805U (en) | 2013-12-04 |
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| CN2013203289156U Expired - Lifetime CN203323805U (en) | 2013-06-07 | 2013-06-07 | Airflow meter and medical device with airflow meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236643A (en) * | 2013-06-07 | 2014-12-24 | 北京谊安医疗系统股份有限公司 | Gas flowmeter and medical device with same |
-
2013
- 2013-06-07 CN CN2013203289156U patent/CN203323805U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236643A (en) * | 2013-06-07 | 2014-12-24 | 北京谊安医疗系统股份有限公司 | Gas flowmeter and medical device with same |
| CN104236643B (en) * | 2013-06-07 | 2019-08-30 | 北京谊安医疗系统股份有限公司 | Gas flowmeter and Medical Devices with it |
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