CN206880891U - A kind of negative pressure generation system - Google Patents
A kind of negative pressure generation system Download PDFInfo
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- CN206880891U CN206880891U CN201720056756.7U CN201720056756U CN206880891U CN 206880891 U CN206880891 U CN 206880891U CN 201720056756 U CN201720056756 U CN 201720056756U CN 206880891 U CN206880891 U CN 206880891U
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Abstract
A kind of negative pressure generation system is the utility model is related to, it includes：Vacuum cavity, it has first interface, second interface and the 3rd interface, wherein, first interface and second interface are the suction interface to vacuum cavity pumping, the direct or indirect negative port as negative pressure generation system of the 3rd interface；First air extractor, it is evacuated by the first interface of vacuum cavity to vacuum cavity, and when its power is W1, the gas flow at first interface is L1, produces negative pressure P1；With the second air extractor, it is evacuated by the second interface of vacuum cavity to vacuum cavity, and when its power is W2, the gas flow at first interface is L2, produces negative pressure P2, wherein, L1 is more than L2, | P1 | be less than | P2 |.The utility model overcome negative pressure source of the prior art flow and negative pressure because the problem of being pind down each other in inverse relation, its flow parameter can be adjusted individually with negative pressure parameter, and predetermined negative pressure value can be rapidly achieved.
Description
Technical field
It the utility model is related to a kind of negative pressure generation system, especially a kind of fast response time, and be easy to because that need to adjust
Negative pressure generation system.
Background technology
Existing negative pressure source, as a rule, under a certain power, it is in inverse relation that its flow parameter and negative pressure parameter, which are,
, want to change flow parameter or negative pressure parameter, such as big flow is both required, when requiring lower negative pressure again, otherwise then adjust
The power of negative pressure source, otherwise the negative pressure source more renewed.That is, existing negative pressure source, is limited by its own performance, it is suitable
It is smaller with scope.This, which results in existing negative pressure source, at least has following weak point：
1st, due to mutually being pind down between its flow and negative pressure value, that is to say, that when flow reaches requirement, then its energy
The negative pressure value reached may not meet demand, and when negative pressure value reaches requirement, its flow may not meet demand, cause to bear
Pressure was produced slowly, for needing the occasion for being rapidly achieved predetermined negative pressure value not to be applicable；
2nd, when both requiring big flow, when requiring lower negative pressure again, then can only be reached by increasing power, now, its
Noise level and volume are probably to be difficult to what is received, may can not be used because noise is exceeded or volume is excessive.
Utility model content
(1) technical problems to be solved
In order to solve the above mentioned problem of prior art, the utility model provides a kind of negative pressure generation system, its flow parameter
It can individually be adjusted with negative pressure parameter, and predetermined negative pressure value can be rapidly achieved.
(2) technical scheme
In order to achieve the above object, the main technical schemes that the utility model uses include：
A kind of negative pressure generation system, it includes：
Vacuum cavity, it has first interface, second interface and the 3rd interface, wherein, first interface and second interface are
To the suction interface of vacuum cavity pumping, the direct or indirect negative port as negative pressure generation system of the 3rd interface；
First air extractor, vacuum cavity is evacuated by the first interface of vacuum cavity, when its power is W1, first
The gas flow of interface is L1, produces negative pressure P1；
Second air extractor, vacuum cavity is evacuated by the second interface of vacuum cavity, when its power is W2, first
The gas flow of interface is L2, produces negative pressure P2,
Wherein, L1 is more than L2, | P1 | be less than | P2 |.
The negative pressure generation system of the utility model one embodiment, wherein：
W1 is more than, less than or equal to W2.
The negative pressure generation system of the utility model one embodiment, wherein：
First air extractor is negative-pressure air fan.
The negative pressure generation system of the utility model one embodiment, wherein：
Second air extractor is air pump.
The negative pressure generation system of the utility model one embodiment, wherein：
Check valve is provided between first air extractor and the first interface of vacuum cavity, to prevent gas by the first pumping
Device flows to vacuum cavity.
The negative pressure generation system of the utility model one embodiment, wherein：
The 3rd interface is closed on before the negative port of negative pressure generation system and is provided with safety valve.
The negative pressure generation system of the utility model one embodiment, wherein：
Pressure sensor is provided with the negative port of negative pressure generation system.
The negative pressure generation system of the utility model one embodiment, it also includes control centre, and control centre takes out to first
Device of air and the second air extractor control respectively.Such as the stream of negative pressure generation system can be controlled by controlling W1 and W2 respectively
Amount and negative pressure.
The negative pressure generation system of the utility model one embodiment, wherein：Control centre includes the pumping of control first respectively
Device and the pumping open and close controlling module of the second air extractor opening and closing.
The negative pressure generation system of the utility model one embodiment, wherein：Control centre includes the pumping of control first respectively
The suction power control module of device and the second air extractor power.
(3) beneficial effect
The beneficial effects of the utility model are：
The structure that the utility model is engaged by the first air extractor and the second air extractor, overcomes in the prior art
Negative pressure source flow and negative pressure because of the problem of being pind down each other in inverse relation so that its flow parameter and negative pressure parameter can be with
Individually regulation, first the gas in vacuum cavity can also be extracted out with big flow, after the predetermined negative pressure P1 for reaching the first ladder, then
Continue to be evacuated from vacuum cavity with high vacuum air pump, until reaching the predetermined negative pressure P2 of the second ladder, it is possible to achieve to negative pressure
The quick of cavity takes out negative pressure.Meanwhile the utility model passes through the difference to the first air extractor and the power of the second air extractor
Adjustment control, the negative pressure value in vacuum cavity can also be adjusted, make it easier to maintain predetermined value, and its adjustable scope
Bigger, application is wider, for example, when needing quickly to take out negative pressure, the overall volume of negative pressure generation system, power will not be notable
Increase, volume and noise level can meet the needs of more harsh.Especially, it can apply to sputum elimination machine or with expectoration function
Lung ventilator, as negative pressure source in use, can meet that small volume, noise are low, can quickly take out the adjustable need of negative pressure, negative pressure
Ask.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the negative pressure generation system of the utility model one embodiment；
Fig. 2 is application schematic diagram of the negative pressure generation system of the utility model one embodiment in lung ventilator.
【Description of reference numerals】
1：Vacuum cavity；2：Negative-pressure air fan；3：Air pump；4：Check valve；5：Safety valve；6：Pressure sensor；7：Control
Center；
A：Expiration expectoration module；A1：Vacuum cavity；A2：Turbofan；A3：Air pump；A4：Check valve；A5：Safety valve；
A6：Pressure sensor；A8：Switching valve；A9：Pressure regulator valve；A10：Oscillator；A11：Flowmeter；A12：Baroceptor；
B：Air-breathing module；B1：Turbofan；B2：Pressure maintaining valve；B3：Flow control valve；B4：Flowmeter；B5：Hybrid chamber；
B6：Switch valve；B7：Oscillator；B8：Flowmeter；B9：Safety valve；B10：Baroceptor；B11：Baroceptor；B12：Cross
Filter；
C：Control system；D：Respiratory muscle is synchronized with the movement module.
Embodiment
It is below in conjunction with the accompanying drawings, right by embodiment in order to understand in order to preferably explain the utility model
The utility model is described in detail.
Referring to Fig. 1, the negative pressure generation system of the utility model one embodiment, it includes：
Vacuum cavity, it has first interface, second interface and the 3rd interface, wherein, first interface and second interface are
To the suction interface of vacuum cavity pumping, the direct or indirect negative port as negative pressure generation system of the 3rd interface；
As the negative-pressure air fan of the first air extractor, vacuum cavity is evacuated by the first interface of vacuum cavity, its work(
When rate is W1, the gas flow at first interface is L1, produces negative pressure P1；
As the air pump of the second air extractor, vacuum cavity is evacuated by the second interface of vacuum cavity, its power
For W2 when, the gas flow at first interface is L2, produce negative pressure P2,
Wherein, L1 is more than L2, | P1 | be less than | P2 |, i.e., the gas volume that can be extracted in the negative-pressure air fan unit interval is more than
The gas volume that can be extracted in the air pump unit interval, and air pump can extract the vacuum reached than negative-pressure air fan more
Height, because the pressure in the incipient stage vacuumized, vacuum cavity is higher, gas density is larger, can be with using negative-pressure air fan
More gases are extracted within the unit interval, and when the pressure in vacuum cavity reaches certain value, the extraction of negative-pressure air fan
Efficiency gradually reduces, until approaching, being equal to, the extraction efficiency less than air pump, and can be continued to negative pressure cavity by air pump
Body vacuumizes, until reaching predetermined negative pressure value, can shorten the pumpdown time to vacuum cavity whereby.
Wherein, negative-pressure air fan can be turbofan.
Preferably, check valve is provided between negative-pressure air fan and the first interface of vacuum cavity, to prevent gas by negative pressure
Blower fan flows to vacuum cavity.
In the present embodiment, the negative port of negative pressure generation system is connected with pipeline, and safety valve and pressure are provided with pipeline
Sensor.Wherein, safety valve is closer to the 3rd interface.
In other embodiments, the negative port of negative pressure generation system can also be directly as the negative pressure of negative pressure generation system
Interface.
In other embodiments, the negative port of negative pressure generation system can also be not provided with safety valve and pressure sensor,
Or one of safety valve and pressure sensor are only set.
Its set location is not limited to above-described embodiment, and safety valve can avoid negative pressure too high, pressure sensor
Pressure in vacuum cavity or the external pressure of negative pressure generation system can be detected.
Preferably, negative pressure generation system also includes control centre, control centre fills to the first air extractor and the second pumping
Put and control respectively, vacuumize efficiency to control whereby and adjust the negative pressure P in vacuum cavity, can be as needed when predetermined
It is interior to reach predetermined negative pressure value, and the volume of negative pressure generation system and noise are easy to control.
Preferably, control centre includes the pumping opening and closing control for controlling the first air extractor and the second air extractor to be opened and closed respectively
Molding block.
Controlled respectively by the opening and closing to the first air extractor and the second air extractor, the height for vacuumizing efficiency is controlled with this
It is low, and adjust the negative pressure P in vacuum cavity whereby, it is reached predetermined negative pressure in the given time, and its power it is controllable,
It is adjustable, negative pressure value stabilization.
Preferably, control centre includes controlling the suction power control of the first air extractor and the second air extractor power respectively
Molding block.
By controlling respectively the power of the first air extractor and the second air extractor, the height for vacuumizing efficiency is controlled with this
It is low, and adjust the negative pressure P in vacuum cavity whereby, it is reached predetermined negative pressure in the given time, and its power it is controllable,
It is adjustable, negative pressure value stabilization.
Wherein, the power W1 of negative-pressure air fan can be more than, the power W2 less than or equal to air pump.
Negative pressure generation system of the present utility model can produce negative pressure as follows：
First predetermined negative pressure P1 will be evacuated to the first air extractor in vacuum cavity；
Again predetermined negative pressure P2 will be evacuated to the second air extractor in vacuum cavity.
Whereby, the utility model can quickly produce predetermined negative pressure, and the volume of its equipment, power are controllable, adjustable, will not
Because adjustment watt level and caused by noise it is excessive.
Negative pressure generation system of the present utility model can also produce negative pressure as follows：
First predetermined negative pressure P1 will be evacuated to the combination of the first air extractor and the second air extractor in vacuum cavity；
Again predetermined negative pressure P2 will be evacuated to the second air extractor in vacuum cavity.
In order to be described further to negative pressure generation system of the present utility model, the utility model additionally provides an implementation
Application of the negative pressure generation system of example in lung ventilator, its negative port connection expiration expectoration module, as expiration expectoration module
Negative pressure source.
Referring to Fig. 2, the lung ventilator in the application example includes control system C, air-breathing module B and expiration expectoration modules A, its
In：
Control system C, including central control unit, human-computer interaction interface, and the driving of ancillary equipment, for entirely exhaling
The control of suction machine, wherein, the control centre of negative pressure generation system is also located in control system C；
Air-breathing module B, for producing malleation air-flow, Breathing Suppotion is provided for patient, air-breathing module B is connected by inspiration limb
It is connected to patient；
Expiration expectoration modules A, for patient exhalation air and patient's expectoration is helped, its expectoration branch road passes through expiration branch road
It is connected to patient.
Wherein, air-breathing module B includes：The source of the gas or external air source interface of positive pressure air are produced, and high pressure oxygen connects
The pressure limiting of switch valve, limitation positive pressure range that mouth, mixed oxide structure and oxygen concentration testing agency, control inspiration limb connect with patient
Valve (safety valve) B9, make to produce the oscillator B7 of air-flow vibration in inspiration limb, control what air-breathing module B connected with inspiration limb
Switch valve B6.
Specifically, air-breathing module B includes turbofan B1, for obtaining positive pressure air；Pressure maintaining valve B2, inputted for stable
High pressure oxygen pressure；Flow control valve B3, for controlling the flow of oxygen and/or air；Flowmeter B4, needed for detecting
The oxygen and/or air mass flow size to be mixed；Hybrid chamber B5, for oxygen and air to be well mixed；Switch valve B6, control
The air-flow break-make of lung ventilator inspiration limb；Oscillator B7, vibration is produced for the air-flow in inspiration limb, its frequency of oscillation can be with
It is set as 10~30Hz；Flowmeter B8, the gas flow sucked during for determining air-breathing, and air-breathing moisture can be calculated accordingly
Amount；Safety valve B9, automatically opened up when malleation is too high in gas circuit, prevent that airline pressure is too high, protect patient safety, such as can be with
Safe pressure is set as 8KPa；Filter B 12, oxygen and air of the filtering into lung ventilator；Baroceptor B10, for supervising
Survey the pressure of the air and oxygen into lung ventilator；Baroceptor B11, the pressure of the mixed gas for monitoring oxygen and air
Power.
Wherein, oscillator B7 could be arranged to vibrate in expiratory phase, or only vibrate when holding one's breath, and can also shake all the time
Swing or be closed all the time.
Wherein, expiration expectoration modules A includes negative pressure source, expectoration branch road, switching valve A8, pressure regulator valve A9 and expiration branch road.
Wherein, negative pressure source is the negative pressure generation system in foregoing any embodiment, and it includes turbofan A2, air pump
A3, vacuum cavity A1.
In use, turbofan A2 quickly will be extracted into certain negative pressure value in vacuum cavity A1, then air pump A3 enters one
Step is extracted into the pressure in vacuum cavity A1 lower predetermined negative pressure.
Preferably, also include check valve A4, safety valve A5 and pressure sensor A6.
Wherein, expiration expectoration modules A includes turbofan A2, for producing low pressure and mass flow air-flow, such as can produce big
In 150L/min flow；Air pump A3, for producing high negative, such as 200cmH can be produced2O negative pressure；Vacuum cavity
A1 prepares sufficiently large negative pressure and volume before expectoration starts, such as its capacity can be 2~5L；Safety valve A5, for preventing
Vacuum cavity A1 negative pressure is too high, protection gas circuit safety, when the negative pressure in vacuum cavity A1 reaches certain threshold value, safety valve (limit
Pressure valve) A5 automatically opens up pressure release；Switching valve A8, for switching expectoration branch road, expiration branch road, switching valve A8 is closed during normal exhalation
Close, vacuum cavity A1 isolates with expiration branch road, and switching valve A8, which is opened, during expectoration makes vacuum cavity A1 be connected with expiration branch road；Pressure regulation
Valve A9, in expectoration pattern, for controlling gas circuit vacuum magnitude, such as negative pressure adjustable range is -10~-150cmH2O, just
During normal expiratory mode, for adjusting end-expiratory positive pressure, such as malleation adjustable range is 0~80cmH2O；Oscillator A10, for making
Air-flow in air flue produces vibration, promotes the loosening of sputum, such as frequency of oscillation can be 10~30Hz；Flowmeter A11, is used for
The gas flow discharged/is exhaled/in measure expiration during expectoration；Baroceptor A12, for monitoring the pressure in expiration branch road；Pressure
Sensors A 6, for monitoring the pressure size in vacuum cavity A1；Check valve A4, it is allowed to which air-flow is from vacuum cavity A1 to turbine wind
Machine A2 one-way flows.
Wherein, when starting expectoration, turbofan A2 quickly will be extracted into certain negative pressure value in vacuum cavity A1, then air
Pump A3 is further extracted into the pressure in vacuum cavity A1 lower predetermined negative pressure, and now check valve A4 is closed automatically.Expectoration
Early stage in journey, the high negative pressure in vacuum cavity A1 establishes the cough air-flow of superhigh speed in expiration branch road, with patient expiration
Tidal volume increase, the pressure in vacuum cavity A1 declines, and the expiratory airflow of patient also begins to decline.The later stage of cough process,
When pressure in vacuum cavity A1 is dropped to below turbofan A2 swabbing pressure, check valve A4 is opened, and patient is in turbine wind
Remaining gas is quickly breathed out in the presence of machine A2.Then cough the incipient stage formed peak value flow velocity, later stage flow velocity under
Drop, pressure value also drop to relatively low negative pressure.Closer to the air-flow normally coughed, later stage less negative pressure pair from airflow waveform
Patient is also preferably to protect, and the whole exhalation process of patient can all feel much smoother.Negative pressure pressure limiting valve A5 and sensors A 6
The negative pressure in vacuum cavity A1 can be ensured in below 20Kpa.
Wherein, when the switching valve A8 is closed, leakage will not be produced under 20Kpa pressure；The switching valve A8 is opened
When, under 300L/min flow, the pressure drop of formation is not over 1Kpa.
Wherein, positive/negative-pressure regulating valve A9 includes malleation and negative pressure regulatory function.Malleation in expiration branch road exceedes in malleation
During limit value, positive port is automatically opened up, and positive port is closed automatically when malleation is less than malleation higher limit.When being negative in expiration branch road
During pressure, positive port is closed all the time.When negative pressure in expiration branch road exceedes negative pressure higher limit, negative port automatically opens up, negative pressure
Negative port is closed automatically during less than negative pressure higher limit.When in expiration branch road being malleation, negative port is closed all the time.
Wherein, oscillator A10 could be arranged to vibrate in expiration phase, or be closed.
Wherein, lung ventilator is also synchronized with the movement module D, including respiratory muscle checking with EMG method submodule and respiratory muscle including respiratory muscle
Stimulate submodule.Respiratory muscle checking with EMG method submodule is used for the electromyographic signal for monitoring respiratory muscle, can be used as and judge respiratory muscle flesh
Power and the man-machine synchronous reference signal of optimization.Be advantageous to the improvement of ventilation quality, help the recovery of respiratory muscle, contribute to carry again
Rise the effect of expectoration.
Wherein, checking with EMG method includes the detection to diaphram myoelectricity.Diaphram checking with EMG method electrode is located at linea medioclavicularis and the 7th
8th intercostal crosspoint.
The evaluation method of patient's muscular strength is, strong according to the autonomous gettering ability of patient, cough of choking dynamics, diaphram electromyographic signal
Degree, some levels are divided into by the autonomous respiration ability of patient.Lowest level is complete apnea, it is proposed that is led to using control model
Gas；Highest level is can be with entirely autonomous breathing, it is proposed that using autonomous respiration ventilating mode or attempts off line.
Wherein, respiratory muscle, which stimulates, includes diaphragm nerve stimulation and abdominal muscle stimulation.The stimulation sites of diaphragm nerve stimulation are two pleurobranch
Lock at papillary muscle lower edge 1/3rd, or at napex phrenic nerve root；Abdominal muscle stimulating electrode is located at rectus aabdominis and/or musculus trasversus abdomins
Place.
When breathing process starts, control system C control respiratory muscle muscle of module D when producing air-breathing that is synchronized with the movement moves
Make, such as make contraction of diaphragm；When exhalation process starts, the control system C control respiratory muscle module D that is synchronized with the movement produces expiration
When muscle movement, such as make contraction of abdominal muscle.
The respiratory muscle is synchronized with the movement in module D, the mode of diaphragm nerve stimulation, can be electro photoluminescence or magnetic thorn
Swash.
Wherein, in terms of control system C parameter setting, in addition to the parameter often having comprising existing lung ventilator, in addition to expectoration
When air-breathing tidal volume set, expectoration when pressure of inspiration(Pi) set, expectoration when expectoration negative pressure is set, inspiratory airflow vibration sets, exhaled
Module D parameter settings that air-flow vibration is set, respiratory muscle is synchronized with the movement.Wherein expectoration when air-breathing tidal volume and pressure of inspiration(Pi) during expectoration
Set with tidal volume during eupnea, pressure of inspiration(Pi) mutually independent.
In terms of parameter display, in addition to the ventilator parameter of routine is shown, the waveform of checking with EMG method may also display and to patient
The scoring of respiratory muscle strength.
The lung ventilator of the application example can be run as follows.
During eupnea, inspiratory phase switch valve B6 is opened, and makes air-breathing module B by inspiration limb and patient UNICOM, to trouble
Person implements positive airway pressure, and switching valve A8 is closed, and the limitation of pressure regulator valve A9 malleations is arranged to the pressure of inspiration(Pi) upper limit.Oscillation module B7 according to
Setting value starts or closed vibration.Control system C leads to according to the mode of operation and state modulator source of the gas and valve of setting to patient
Gas, such as air-breathing tidal volume and pressure of inspiration(Pi), and pass through flow and pressure that flow valve B4 and baroceptor B11 detects positive airway pressure
Power.Expiratory phase, switch valve B6 are closed, and the limitation of pressure regulator valve A9 malleation is arranged to end-expiratory positive pressure, patient by expiration branch road and
Pressure regulator valve A9 positive pressure side is exhaled.In exhalation process, oscillator A10 starts or closed according to setting value.Control system C is according to setting
Fixed pattern and state modulator pressure regulator valve, and pass through the flow and pressure of flowmeter A11 and baroceptor A12 detection expiration branch roads
Power.
During cough, inspiratory phase switch valve B6 is opened, and switching valve A8 is closed, and the limitation of pressure regulator valve A9 malleations is arranged to pressure of inspiration(Pi)
The upper limit, the negative pressure upper limit are arranged to negative pressure value during expectoration；Oscillation module B7, which starts or closed according to setting value, to be vibrated.Control system C
According to the mode of operation of setting and state modulator source of the gas and valve to patient ventilation, as during expectoration when air-breathing tidal volume, expectoration
Pressure of inspiration(Pi) is set, and the flow and pressure of positive airway pressure are detected by flowmeter B8 and baroceptor B11.Expiratory phase, open
Close valve B6 to close, pressure regulator valve A9 negative pressure limitation is arranged to negative pressure value during expectoration.Switching valve A8 is quickly opened, and makes expiration branch gas circuit
It is suddenly exposed under vacuum cavity A1 negative pressure, produces the cough air-flow of high speed.During cough, oscillator A10 is according to setting
Definite value starts or closed.Control system C passes through flowmeter A11 and air pressure according to the pattern and state modulator pressure regulator valve of setting
Sensors A 12 detects the flow and pressure of expiration branch road, when detecting the tidal volume that expiration tidal volume sucks close to patient, or
Person's expiratory airflow closes switching valve A8 immediately when being less than a certain threshold value makes patient isolate with vacuum cavity A1.
In summary, the negative pressure expectoration function of the application example lung ventilator, can simulate the normal cough of people, solve clinic
The problem of patients with mechanical ventilation expectoration difficulties, and negative pressure generation system mutually pins down due to overcoming flow in the prior art with negative pressure
Technical problem, negative pressure in time, stable can be provided for it, can more preferable simulation people normal cough, Arterial blood gas
More preferably.
Claims (10)
1. a kind of negative pressure generation system, it is characterised in that it includes：
Vacuum cavity, it has first interface, second interface and the 3rd interface, wherein, first interface and second interface are to negative
Press the suction interface of cavity pumping, the direct or indirect negative port as negative pressure generation system of the 3rd interface；
First air extractor, vacuum cavity is evacuated by the first interface of vacuum cavity, when its power is W1, in first interface
The gas flow at place is L1, produces negative pressure P1；
Second air extractor, vacuum cavity is evacuated by the second interface of vacuum cavity, when its power is W2, in first interface
The gas flow at place is L2, produces negative pressure P2,
Wherein, L1 is more than L2, | P1 | be less than | P2 |.
2. negative pressure generation system as claimed in claim 1, it is characterised in that：
W1 is more than, less than or equal to W2.
3. negative pressure generation system as claimed in claim 1, it is characterised in that：
First air extractor is negative-pressure air fan.
4. negative pressure generation system as claimed in claim 1, it is characterised in that：
Second air extractor is air pump.
5. negative pressure generation system as claimed in claim 1, it is characterised in that：
Check valve is provided between first air extractor and the first interface of vacuum cavity, to prevent gas by the first air extractor
Flowed to vacuum cavity.
6. negative pressure generation system as claimed in claim 1, it is characterised in that：
The 3rd interface is closed on before the negative port of negative pressure generation system and is provided with safety valve.
7. negative pressure generation system as claimed in claim 1, it is characterised in that：
Pressure sensor is provided with the negative port of negative pressure generation system.
8. negative pressure generation system as claimed in claim 1, it is characterised in that：
Also include control centre, control centre controls the first air extractor and the second air extractor respectively.
9. negative pressure generation system as claimed in claim 8, it is characterised in that：
Control centre includes the pumping open and close controlling module for controlling the first air extractor and the second air extractor to be opened and closed respectively.
10. negative pressure generation system as claimed in claim 8, it is characterised in that：
Control centre includes controlling the suction power control module of the first air extractor and the second air extractor power respectively.
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| CN201720056756.7U CN206880891U (en) | 2017-01-18 | 2017-01-18 | A kind of negative pressure generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106730065A (en) * | 2017-01-18 | 2017-05-31 | 蔡小奇 | A kind of negative pressure generation system and negative pressure production method |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106730065A (en) * | 2017-01-18 | 2017-05-31 | 蔡小奇 | A kind of negative pressure generation system and negative pressure production method |
| CN106730065B (en) * | 2017-01-18 | 2024-03-08 | 北京雅果科技有限公司 | Negative pressure generating system and negative pressure generating method |
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