CN208611522U - Air-breather and respirator system - Google Patents
Air-breather and respirator system Download PDFInfo
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- CN208611522U CN208611522U CN201721923548.9U CN201721923548U CN208611522U CN 208611522 U CN208611522 U CN 208611522U CN 201721923548 U CN201721923548 U CN 201721923548U CN 208611522 U CN208611522 U CN 208611522U
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Abstract
The utility model embodiment provides a kind of air-breather and respirator system, belongs to ventilation therapy field.The air-breather includes: blower, and the blower has air inlet；Inlet channel, the inlet and outlet with gas, the outlet is connected to the air inlet of the blower；First pressure detection module, for detecting the first pressure of the first position on the inlet channel；And second pressure detection module, for detecting the second pressure of the second position on the inlet channel；Wherein, the first position and the second position are the different location on the inlet channel, and variable cross-section venting flow path is formed between the first position and the second position.The respirator system includes above-mentioned air-breather.Take this, realize and do not need individually designed vapour lock part and can generate constant vapour lock to gas, so that the pressure that gas generates at different location on inlet channel is different, to form pressure difference between the two positions, reduces design and producing cost.
Description
Technical field
The utility model relates to ventilation therapy fields, more particularly to a kind of air-breather and respirator system.
Background technique
Medium-to-high grade ventilator, the general monitoring and display for requiring to have flow F, tidal volume Vt, minute ventilation Mv, this needs
Ventilator has the ability of measuring flow.Some ventilators can analyze sleep-respiratory event, this is also required to data on flows conduct
Basis.Therefore, the measurement of flow is important for ventilator.In addition, household noninvasive ventilator is without using special
Gas source, but gas source is used air as, so thering is filter cotton to filter the air in air inlet.The filtering energy of filter cotton
Power would generally regularly replace filter cotton with using the increase of time gradually to weaken or even completely plugged.
Ventilator generally uses the measurement of flow sensor progress flow.Traffic transformation can be telecommunications by flow sensor
Number giving respirator system is acquired and handles, and has hot wire type, crystal hot diaphragm type, ultrasonic type, pressure inductive, pressure difference at present
The multiple types such as formula.Ventilator generally carries out timing using the time to filter cotton, when reaching the set time (such as 1 month),
Prompt user is filtered the replacement of cotton, and manually resets timer after replacement.The allusion quotation of Use of respirator flow sensor
Type system is as shown in Figure 1.Particularly, partial pressure differential formula flow sensor is needed such as the SDP500 series of sensirion company
Individually designed matching used vapour lock part or air flue, as shown in Figure 2.The replacement of filter cotton is reminded, generally by software by such as
Process shown in Fig. 3 carries out.Following disadvantage: (1) flow sensor higher cost exists in the prior art, particularly with range and
The relatively high situation of the requirement of measurement accuracy, cost may be higher；(2) partial discharge sensor, such as differential flow sensing
Device needs individually designed air flue or vapour lock part to meet the measurement request (such as range) of sensor, will increase in this way design and
Production cost；(3) service condition that filter cotton is judged according to duration is used not is the truth of filter cotton, may
Occur causing the problem of Use of respirator exception not in time due to filter cotton replacement.
Utility model content
The purpose of the utility model embodiment is to provide a kind of air-breather and respirator system, can realize and not need list
Solely design vapour lock part can generate constant vapour lock to gas, so that the pressure that gas generates at different location on inlet channel
With pressure drop, reduces and design and produce cost.
To achieve the goals above, the one aspect of the utility model embodiment provides a kind of air-breather, ventilation dress
Setting includes: blower, and the blower has air inlet；Inlet channel, the inlet and outlet with gas, the outlet and the wind
The air inlet of machine is connected to；First pressure detection module, for detecting the first pressure of the first position on the inlet channel；With
And second pressure detection module, for detecting the second pressure of the second position on the inlet channel；Wherein, described first
Setting with the second position is the different location on the inlet channel, is formed between the first position and the second position
Variable cross-section venting flow path.
Optionally, which further includes and the first pressure detection module and the second pressure detection module point
The controller not connected, the controller are used for: calculating pressure difference according to the first pressure and the second pressure；And root
Flow is calculated according to the pressure difference.
Optionally, which further includes the gas filtration module for filtering the gas, the gas filtration mould
Block is set to the entrance of the inlet channel；The first position is located at the gas filtration module down-stream and close to the gas
Body filtering module.
Optionally, the controller further includes the reminding module for prompting changing gas filtration module, the prompting mould
Root tuber determines whether that user is reminded to replace the gas filtration module according to the first pressure and preset pressure value.
Optionally, the second position is the outlet of the inlet channel.
Optionally, the inlet channel includes at least one silencing cavity, between the first position and the second position
It is spaced at least one described silencing cavity.
Optionally, which further includes being set in the inlet channel and being located at the first position and described the
Resistance module between two positions.
In addition, the another aspect of the utility model embodiment provides a kind of respirator system, the respirator system includes
Above-mentioned air-breather.
Through the above technical solutions, by the outlet of the air inlet of blower and inlet channel, blower make gas from into
The import in gas channel flows to outlet, and setting first pressure detection module detects the first pressure of the first position on inlet channel,
The second pressure of the second position on second pressure detection module detection inlet channel is set, wherein first position and the second position
For the different location on inlet channel, and variable cross-section venting flow path is formed between first position and the second position.It is cut with becoming
The inlet channel of face venting flow path generates constant vapour lock to gas, so that gas generated at different location on inlet channel
Pressure is different, to form pressure difference between the two positions.In this way, realize do not need individually designed vapour lock part can be to gas
Body generates constant vapour lock, so that the pressure that gas generates at different location on inlet channel has pressure drop, convenient accurate survey
Pressure is measured, design and producing cost is reduced.
The other feature and advantage of the utility model embodiment will give in the following detailed description section specifically
It is bright.
Detailed description of the invention
Attached drawing is to further understand for providing to the utility model embodiment, and constitute part of specification,
It is used to explain the utility model embodiment together with following specific embodiment, but does not constitute to the utility model embodiment
Limitation.In the accompanying drawings:
Fig. 1 is the schematic diagram of Use of respirator flow sensor measuring flow in the prior art；
Fig. 2 is the schematic diagram for using partial pressure differential formula flow sensor measuring flow in the prior art；
Fig. 3 is the logical schematic for replacing filter cotton in the prior art；
Fig. 4 is the structural block diagram for the air-breather that an embodiment of the utility model provides；
Fig. 5 is the structural block diagram for the air-breather that another embodiment of the utility model provides；
Fig. 6 is the structural block diagram for the air-breather that another embodiment of the utility model provides；
Fig. 7 is the structural block diagram for the air-breather that another embodiment of the utility model provides；
Fig. 8 is the schematic diagram of the flow for the detection gas flowing that another embodiment of the utility model provides；And
Fig. 9 is the logical schematic for the replacement filter cotton that another embodiment of the utility model provides.
Description of symbols
1 inlet channel, 2 blower
3 first pressure sensor, 4 second pressure sensor
5 controller, 6 gas filtration module
7 reminding module, 8 resistance module
The first position the A second position B
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the utility model embodiment.It should be understood that
It is that specific embodiment described herein is merely to illustrate and explains the utility model embodiment is not limited to this reality
Use new embodiment.
The one aspect of the utility model embodiment provides a kind of air-breather.Fig. 4 is that an embodiment of the present invention mentions
The structural block diagram of the air-breather of confession.As shown in figure 4, the device includes inlet channel 1, blower 2, first pressure detection module 3
With second pressure detection module 4.Wherein, inlet channel 1 has the inlet and outlet of gas, and blower 2 has air inlet, and air inlet is logical
The outlet in road 1 is connected to the air inlet of blower 2.First pressure detection module 3 detects at the first position A on inlet channel 1
First pressure, second pressure detection module 4 detect the second pressure at the second position B on inlet channel 1.First position A and
Second position B is the different location on inlet channel 1, and variable cross-section vent flow is formed between first position A and second position B
Road.Optionally, first pressure detection module 3 and second pressure detection module 4 can be pressure sensor.
By the outlet of the air inlet of blower and inlet channel, blower flows to out gas from the import of inlet channel
Mouthful, setting first pressure detection module detects the first pressure of the first position on inlet channel, and setting second pressure detects mould
Block detects the second pressure of the second position on inlet channel, and wherein first position and the second position are the difference on inlet channel
Position, and variable cross-section venting flow path is formed between first position and the second position.After blower unlatching, the first pressure and the
Two pressure are negative pressure；Inlet channel with variable cross-section venting flow path generates constant vapour lock to gas so that gas into
The pressure generated at different location on gas channel is different, to form pressure difference between the two positions.It is not required in this way, realizing
Want individually designed vapour lock part that can generate constant vapour lock to gas, so that gas generated at different location on inlet channel
Pressure has pressure drop, and convenient accurate measurement pressure reduces design and producing cost.
It should be noted that variable cross-section venting flow path refer to it is for gas to pass through between first position A and second position B
Aisle spare be variation, generally, can shape as long as the aisle spare between first position A and second position B is different
At variable cross-section venting flow path, so that the pressure at first position A and second position B is different.It will be understood by those skilled in the art that
The variation of aisle spare size for gas to pass through between first position A and second position B can be rule variation, can also
To be irregular, it is only necessary to guarantee there is the aisle spare an of position and other between first position A and second position B
The aisle spare of position is different, then can form variable cross-section venting flow path.Here for the cross of first position A and second position B
Whether area of section is consistent without limitation.
Fig. 5 is the structural block diagram for the air-breather that another embodiment of the utility model provides.With air-breather shown in Fig. 4
The difference is that air-breather shown in fig. 5 further includes controller 5.As shown in figure 5, controller 5 respectively with first pressure
Detection module 3 and second pressure detection module 4 connect, at the first position A for being detected according to first pressure detection module 3
The second pressure at the B of the second position that first pressure and second pressure detection module 4 detect calculates pressure difference, and according to pressure difference
Calculate flow.In addition, method easier in is, the mapping table of normal flow and pressure drop can be calibrated in advance,
Flow value is obtained with look-up table after obtaining pressure difference.
Pressure on two pressure detecting modules detection inlet channel at different location is set, which is examined
Variable cross-section venting flow path is formed between the different location of survey.The inlet channel with variable cross-section venting flow path generates gas permanent
Fixed vapour lock, so that the pressure that gas generates at different location on inlet channel has difference, thus between the two positions
Form pressure difference.The flow that the pressure difference and gas flow in inlet channel is proportional relationship, therefore, according to the pressure difference
The flow of gas can be calculated.Two pressure detecting modules are set and detect pressure on inlet channel at different location respectively, and
The difference of two pressure detected according to two pressure detecting modules calculates flow, reduces to the precision of pressure detecting module
It is required that reducing costs.In addition, being calculated by the pressure at detection different location, and then according to the pressure difference at different location
Flow is convenient for some other in this way, can learn the specific pressure value of detected position while calculating outflow
Judgement.For example, if the air-breather includes gas filtration module, and the position that first pressure detection module is detected is arranged in gas
The downstream of body filtering module and close gas filtration module, then can be according to the value that first pressure detection module detects and default pressure
Force value judges the service condition of gas filtration module, convenient for reminding user to replace gas filtration module in time.
In addition, can suitably increase two differences of two pressure detecting modules detection in the embodiments of the present invention
The distance between position, in this way, the pressure value that two pressure detecting modules can be made to detect has bigger pressure difference, just
In calculating flow, the required precision to pressure detecting module is further decreased.For example, first pressure detection module is detected
The entrance of inlet channel is arranged in one position, the inlet channel for the second position setting that second pressure detection module is detected
Exit.
Optionally, in the embodiments of the present invention, which further includes the gas filtration for filtering gas
Module, gas filtration module are set to the entrance of inlet channel；First position is located at gas filtration module down-stream and close to gas
Body filtering module.In air-breather be arranged gas filtration module, can before gas enters inlet channel first to gas into
Row filtering, can make the gas in inlet channel more clean.
Fig. 6 is the structural block diagram for the air-breather that another embodiment of the utility model provides.With air-breather shown in fig. 5
The difference is that air-breather shown in fig. 6 further includes gas filtration module 6.As shown in fig. 6, gas filtration module 6 is set
It is placed in the entrance of inlet channel 1, for filtering the gas for entering inlet channel 1.Wherein, which can be
Filter cotton.In addition, first position A is located at the downstream of gas filtration module 6 and close to gas filtration module 6.Controller 5 further includes
Reminding module 7.The first pressure and preset pressure at the A of first position that reminding module 7 is detected according to first pressure detection module 3
Value, judges the state of gas filtration module 6, to determine whether that user is reminded to replace gas filtration module 6.For example, when the first pressure
When power is less than preset pressure value, user is reminded to replace gas filtration module 6.
When using new gas filtration module, the vapour lock very little of gas filtration module, i.e., very to the resistance of gas generation
It is small, so that the pressure drop also very little that gas generates.With the increase for using the time, the vapour lock of gas filtration module also be will increase, and be made
Obtaining the pressure drop that gas generates can become larger.And first position, close to gas filtration module, therefore, first pressure can be very good to react
The service condition of gas filtration module.Set preset pressure value, it is believed that when first pressure is not less than the preset pressure value, gas
Filtering module is effective, when first pressure is less than the preset pressure value, it is believed that gas filtration module is invalid.In this way, according to first
Pressure and preset pressure value determine whether that user is reminded to replace gas filtration module, can really be made according to gas filtration module
It is replaced with situation, avoids the problem that caused by cannot being replaced in time because of gas filtration module, help to improve user experience, and
Reduce replacement cost.
Optionally, in the embodiments of the present invention, inlet channel includes at least one silencing cavity, first position and
At least one silencing cavity is spaced between two positions.In this way, generating constant vapour lock to the gas in inlet channel realizing
In the case of, noise can also be reduced, improve the satisfaction of user.
Fig. 7 is the structural block diagram for the air-breather that another embodiment of the utility model provides.With device shown in Fig. 4
The difference is that device shown in Fig. 7 further includes resistance module 8.As shown in fig. 7, resistance module 8 is arranged at inlet channel
Inside 1, and between first position A and second position B.Resistance module 8 can generate constant resistance to gas, to increase
Pressure drop between big first position A and second position B, convenient for more accurately carrying out the measurement of flow.Wherein, resistance module 8 can
To be vapour lock part.Compared with the existing technology, it is necessary to resistance module is integrated in the scheme on two pressure sensors, this is practical new
Any position between first position A and second position B can be set in the resistance module of type.
Fig. 8 is the schematic diagram for detection object traffic flow that another embodiment of the utility model provides.Wherein, exist
In the embodiment, detection is the flow of gas in ventilator air intake duct.As shown in figure 8, in air intake duct (the i.e. above-mentioned reality of ventilator
Apply the inlet channel in example) front end, filter cotton rear end placement force sensor a, according to the available pressure of pressure sensor a
P1 (i.e. first pressure).In the air intake duct end of ventilator, the front end placement force sensor b of the air inlet of blower, according to pressure
The available pressure P2 (i.e. second pressure) of force snesor b.Since the inlet end of ventilator needs to do the processing such as noise reduction,
One section of air intake duct can be designed in structure.This section of air intake duct can generate a constant vapour lock.When air-flow passes through air intake duct, can produce
Raw pressure drop, there are proportional relationships for the pressure drop and flow.Ventilator acquires P1 and P2, after blower unlatching, pressure P1 and pressure
P2 is negative pressure, and pressure P2 is negative pressure more smaller than pressure P1；P1 and P2 are transferred to control system, control system root by ventilator
Pressure difference is calculated according to P1 and P2, and then flow is calculated according to pressure difference meter.It, can be in addition, method easier in is
The mapping table for calibrating normal flow and pressure drop in advance obtains flow value with look-up table after obtaining pressure difference.
In addition, when using new filter cotton, the vapour lock very little of filter cotton, the pressure drop of generation also very little, pressure sensing at this time
The collected pressure P1 of device a and external pressure are almost the same, as 0hPa.With the increase for using the time, the gas of filter cotton
Resistance also will increase, and the pressure drop of generation can become larger, and P1 is negative pressure value at this time.Therefore by P1 value, it is estimated that filter cotton makes
Use situation.By experiment, a reasonable threshold value Pc can be set, as P1 < Pc, it is believed that filter cotton has lost validity,
It needs that user is reminded to replace filter cotton.Where it is determined whether the logical schematic for reminding user to replace filter cotton is as shown in Figure 9.
In addition, the another aspect of the utility model provides a kind of respirator system, which includes above-mentioned implementation
Air-breather described in example.
In conclusion by the outlet of the air inlet of blower and inlet channel, blower makes gas from inlet channel
The outlet of import flow direction, setting first pressure detection module detect the first pressure of the first position on inlet channel, setting second
Pressure detecting module detects the second pressure of the second position on inlet channel, and wherein first position and the second position are logical for air inlet
Different location on road, and variable cross-section venting flow path is formed between first position and the second position.With variable cross-section vent flow
The inlet channel in road generates constant vapour lock to gas, so that the pressure that gas generates at different location on inlet channel has
Pressure drop.Constant vapour lock can be generated to gas in this way, realizing and not needing individually designed vapour lock part, so that gas is logical in air inlet
The pressure generated at different location on road has difference, to form pressure difference between the two positions, reduces design and life
Produce cost.
Pressure on two pressure detecting modules detection inlet channel at different location is set, which is examined
Variable cross-section venting flow path is formed between the different location of survey.The inlet channel with variable cross-section venting flow path generates gas permanent
Fixed vapour lock, so that the pressure that gas generates at different location on inlet channel has pressure drop, therefore two pressure detecting modules
The pressure detected has pressure difference.The flow that the pressure difference and gas flow in inlet channel is proportional relationship, therefore,
The flow of gas can be calculated according to the pressure difference.In addition, by the pressure at detection different location, and then according to different location
The pressure difference at place calculates flow and is convenient in this way, can learn the specific pressure value of detected position while calculating outflow
Carry out some other judgements.For example, air-breather includes gas filtration module, and the position that first pressure detection module is detected
The downstream in gas filtration module and close gas filtration module are installed, then can be detected according to first pressure detection module
Value and preset pressure value judge the service condition of gas filtration module, convenient for reminding user to replace gas filtration module in time.And
And determined whether that user is reminded to replace gas filtration module according to first pressure and preset pressure value, it can be according to gas filtration
The true service condition of module is replaced, and is avoided the problem that caused by cannot replacing in time because of gas filtration module, is helped to improve
User experience, and reduce replacement cost.In addition, gas filtration module is arranged in air-breather can enter air inlet in gas
First gas is filtered before channel, so that the gas in inlet channel more cleans.In addition, in the embodiments of the present invention
In, it can suitably increase the distance between two different locations of two pressure detecting modules detection, in this way, two pressure can be made
The pressure value that detection module detects has bigger pressure difference, convenient for calculating flow.In addition, including at least in inlet channel
One silencing cavity, two pressure detecting modules detection two different locations between be spaced at least one silencing cavity, in this way, realizing
In the case where generating constant vapour lock to the gas in inlet channel, noise can also be reduced, improve the satisfaction of user.
The optional embodiment of the utility model embodiment, still, the utility model is described in detail in conjunction with attached drawing above
Embodiment be not limited to the above embodiment in detail can in the range of the technology design of the utility model embodiment
A variety of simple variants are carried out with the technical solution to the utility model embodiment, these simple variants belong to the utility model reality
Apply the protection scope of example.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the utility model is implemented
No further explanation will be given to various combinations of possible ways for example.
In addition, any combination can also be carried out between a variety of different embodiments of the utility model embodiment, as long as
It equally should be considered as the utility model embodiment disclosure of that without prejudice to the thought of the utility model embodiment.
Claims (8)
1. a kind of air-breather, which is characterized in that the air-breather includes:
Blower, the blower have air inlet；
Inlet channel, the inlet and outlet with gas, the outlet is connected to the air inlet of the blower；
First pressure detection module, for detecting the first pressure of the first position on the inlet channel；And
Second pressure detection module, for detecting the second pressure of the second position on the inlet channel；
Wherein, the first position and the second position are the different location on the inlet channel, the first position and
Variable cross-section venting flow path is formed between the second position.
2. air-breather according to claim 1, which is characterized in that the air-breather further includes examining with the first pressure
The controller that survey module and the second pressure detection module are separately connected, the controller are used for:
Pressure difference is calculated according to the first pressure and the second pressure；And
Flow is calculated according to the pressure difference.
3. air-breather according to claim 2, which is characterized in that the air-breather further includes for filtering the gas
Gas filtration module, the gas filtration module is set to the entrance of the inlet channel；The first position is located at institute
State gas filtration module down-stream and close to the gas filtration module.
4. air-breather according to claim 3, which is characterized in that the controller further includes for prompting changing gas
The reminding module of filtering module, the reminding module determine whether to remind user more according to the first pressure and preset pressure value
Change the gas filtration module.
5. air-breather described in any one of -4 according to claim 1, which is characterized in that the second position is the air inlet
The outlet in channel.
6. air-breather described in any one of -4 according to claim 1, which is characterized in that the inlet channel includes at least one
A silencing cavity is spaced at least one described silencing cavity between the first position and the second position.
7. air-breather according to claim 1, which is characterized in that the air-breather further includes being set to the air inlet to lead to
Resistance module in road and between the first position and the second position.
8. a kind of respirator system, which is characterized in that the respirator system includes described in any one of claim 1 to 7
Air-breather.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721923548.9U CN208611522U (en) | 2017-12-29 | 2017-12-29 | Air-breather and respirator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721923548.9U CN208611522U (en) | 2017-12-29 | 2017-12-29 | Air-breather and respirator system |
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| Publication Number | Publication Date |
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| CN208611522U true CN208611522U (en) | 2019-03-19 |
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ID=65690956
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| CN201721923548.9U Active CN208611522U (en) | 2017-12-29 | 2017-12-29 | Air-breather and respirator system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113842528A (en) * | 2020-06-28 | 2021-12-28 | 南京理工大学 | Differential pressure controlled high-flow ventilation method and system |
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2017
- 2017-12-29 CN CN201721923548.9U patent/CN208611522U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113842528A (en) * | 2020-06-28 | 2021-12-28 | 南京理工大学 | Differential pressure controlled high-flow ventilation method and system |
| CN113842528B (en) * | 2020-06-28 | 2023-08-22 | 南京理工大学 | Differential pressure controlled high flow ventilation method and system |
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