CN107050597A - A kind of medical compressed air feedway and its control method - Google Patents
A kind of medical compressed air feedway and its control method Download PDFInfo
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- CN107050597A CN107050597A CN201710221826.4A CN201710221826A CN107050597A CN 107050597 A CN107050597 A CN 107050597A CN 201710221826 A CN201710221826 A CN 201710221826A CN 107050597 A CN107050597 A CN 107050597A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/105—Filters
- A61M16/106—Filters in a path
- A61M16/1065—Filters in a path in the expiratory path
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/36—General characteristics of the apparatus related to heating or cooling
- A61M2205/3606—General characteristics of the apparatus related to heating or cooling cooled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/91—Bacteria; Microorganisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/65—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for the sterilisation of air
Abstract
The invention discloses a kind of medical compressed air feedway and its control method, the device includes the first air compressor machine and the second air compressor machine being set up in parallel, air accumulator, the first filter, the second filter, dried-air drier and the sterilizing filter being sequentially connected, and controller；It is provided with the outlet conduit of first air compressor machine on first pressure transmitter and the first magnetic valve, the outlet conduit of second air compressor machine and is provided with second pressure transmitter and the second magnetic valve.Wherein, controller obtains the outlet air pressure of the first air compressor machine or the second air compressor machine and makees to judge in real time, switch use and the stand-by state of the first air compressor machine and the second air compressor machine in time, ensure that all the time has an air compressor machine in stable operation, constantly provide stable air pressure, it is ensured that use the life security of the patient of respirator.
Description
Technical field
The present invention relates to technical field of medical equipment, more particularly to a kind of medical compressed air feedway and its controlling party
Method.
Background technology
Lung ventilator has become Routine Medical Device essential in medical institutions, is widely used in each clinical section
Room, especially emergency treatment and CICU.The gas supply device of lung ventilator includes compressed air feedway and oxygen is supplied
To device, compressed air and mixed by a certain percentage with the oxygen of oxygen feedway offer that compressed air feedway is provided
Respirator is delivered to after conjunction to use for patient.
In the prior art, the air compressor machine used in medical breathing machine（Air compressor）Nearly all it is no standby, or
Person is provided with standby air compressor machine, is also that operating personnel are manually switched to another compressor again when an air compressor machine breaks down,
However, without standby air compressor machine or the switching of standby air compressor machine not in time, will all use the patient of breathing air in time to needs
Cause life danger；And when air compressor machine breaks down to operating personnel perform manual switching this process it is longer all can caused by
The pressure of the air of offer is excessive or too small, and different influences can be all caused to patient.
Therefore, prior art has yet to be improved and developed.
The content of the invention
In view of in place of above-mentioned the deficiencies in the prior art, being filled it is an object of the invention to provide a kind of supply of medical compressed air
Put and its control method, it is intended to realize and enable standby compressor when air compressor machine breaks down automatically, it is ensured that stable pressure is provided
Contracting air.
In order to achieve the above object, this invention takes following technical scheme：
A kind of medical compressed air feedway, including the first air compressor machine and the second air compressor machine being set up in parallel, are sequentially connected
Air accumulator, the first filter, the second filter, dried-air drier and sterilizing filter, and controller；First air compressor machine
Outlet conduit and the second air compressor machine outlet conduit it is in parallel after be connected with the import of air accumulator；The outlet of first air compressor machine
It is provided with pipeline on first pressure transmitter and the first magnetic valve, the outlet conduit of second air compressor machine and is provided with the second pressure
Power transmitter and the second magnetic valve；It is provided with the 3rd pressure transmitter, the outlet conduit of air accumulator and sets on the air accumulator
There is the 3rd magnetic valve；The 4th pressure transmitter is provided with the outlet conduit of the dried-air drier；Above-mentioned first air compressor machine,
Two air compressor machines, first pressure transmitter, second pressure transmitter, the 3rd pressure transmitter, the 4th pressure transmitter, the first electromagnetism
Valve, the second magnetic valve and the 3rd magnetic valve are connected with the controller respectively.
Described medical compressed air feedway kind, first air compressor machine and the second air compressor machine are piston type pneumatic
Compressor.
In described medical compressed air feedway, first air compressor machine and the second air compressor machine include a set of cold respectively
But water system, every suit cooling water system includes water pump, the first water tank, the second water tank, cooling water pipe, the first water tank respectively
Inlet solenoid valve, the first tank outlet magnetic valve, the second water tank inlet solenoid valve and the second tank outlet magnetic valve；Described first
The import of water pump, the inlet pipeline parallel connection of the first water tank and the second water tank are connected after the outlet conduit of water tank and the second water tank is in parallel
One end of cooling water pipe is connected to afterwards, and the other end of cooling water pipe is connected to the outlet of water pump；Above-mentioned water pump, the first water tank import
Magnetic valve, the first tank outlet magnetic valve, the second water tank inlet solenoid valve and the second tank outlet magnetic valve respectively with controller
Connection.
In described medical compressed air feedway, set respectively on the cooling water pipe of every suit cooling water system
There are a fin-tube type heat exchanger, and the blower fan being correspondingly arranged with fin-tube type heat exchanger；Each described blower fan respectively with controller
Connection.
In described medical compressed air feedway, in addition to be connected respectively with controller display, outside input
Equipment and alarm.
In described medical compressed air feedway, the dried-air drier is absorption drier.
In described medical compressed air feedway, the first DSP that the controller includes connecting by serial ports is controlled
Device and the second dsp controller；First air compressor machine, first pressure transmitter, the 3rd pressure transmitter, the 4th pressure inverting
Device, the water pump of the first magnetic valve and the first cooling water system of air compressor, the first water tank inlet solenoid valve, the first tank outlet
Magnetic valve, the second water tank inlet solenoid valve and the second tank outlet magnetic valve respectively with the first dsp controller；Second pneumatics
Machine, second pressure transmitter, water pump, the first water tank import electromagnetism of the second magnetic valve and the second cooling water system of air compressor
Valve, the first tank outlet magnetic valve, the second water tank inlet solenoid valve and the second tank outlet magnetic valve are controlled with the 2nd DSP respectively
Device.
The present invention also provides the control method for correspondingly providing described medical compressed air feedway, the controlling party
Method comprises the following steps：
The lower limit P1 and upper limit P2 of the outlet atmospheric pressure value of the first air compressor machine and the second air compressor machine, gas storage are preset in S100, controller
Tank atmospheric pressure value P3, dried-air drier outlet atmospheric pressure value P4；
S200, controller receive start-up command, and the first magnetic valve opening, the second closed electromagnetic valve, the first pneumatics are controlled respectively
Machine is run;Then step S310 and step S320 is performed simultaneously；
Testing result is simultaneously fed back to controller by S310, the actual pressure value P5 in the 3rd pressure transmitter detection air accumulator, is controlled
Device processed receives the detected value of the 3rd pressure transmitter feedback and P5 and P3 makes comparisons, if P4 ＜ P3, the electricity of control the 3rd
Magnet valve is closed, if P4 >=P3, and the 3rd magnetic valve of control is opened；
Testing result is simultaneously fed back to control by S320, the air compressor machine of first pressure transmitters sense first outlet actual pressure value P6
Device, controller receives the detected value of first pressure transmitter feedback and P6 makes comparisons with P1 and P2, if P1≤P6≤P2,
Then keep the first air compressor machine to continue to run with, if P6 ＜ P1 or P6 ＞ P2, controller control respectively the first closed electromagnetic valve,
Second magnetic valve is opened, the first air compressor machine is out of service, the second compressor operation, then then performs step S330；
Testing result is simultaneously fed back to control by S330, the air compressor machine of second pressure transmitters sense second outlet actual pressure value P7
Device, controller receives the and the detected value of pressure transmitter feedback and P7 made comparisons with P1 and P2, if P1≤P7≤P2,
Then keep the second air compressor machine to continue to run with, if P7 ＜ P1 or P7 ＞ P2, controller control respectively the second closed electromagnetic valve,
First magnetic valve is opened, the second air compressor machine is out of service, the first compressor operation, then then performs step S320.
Further, in the control method of described medical compressed air feedway, the step S100 also includes：
The first water tank and the second water tank switching interval time T1 are preset in controller；
The step S320 also includes：Control controls the water pump operation of the first air compressor machine, the first water tank inlet solenoid valve to open respectively
Open, the first tank outlet magnetic valve is opened, the second water tank inlet solenoid valve is closed, the second tank outlet closed electromagnetic valve；Hereafter
After per elapsed time T1, controller controls the first water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank to enter respectively
The opening and closing state of mouth magnetic valve and the second tank outlet magnetic valve is once switched；
The step S330 also includes：Control controls the water pump operation of the second air compressor machine, the first water tank inlet solenoid valve to open respectively
Open, the first tank outlet magnetic valve is opened, the second water tank inlet solenoid valve is closed, the second tank outlet closed electromagnetic valve；Hereafter
After per elapsed time T1, controller controls the first water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank to enter respectively
The opening and closing state of mouth magnetic valve and the second tank outlet magnetic valve is once switched.
Further, the step S310 also includes：4th pressure transmitter detection dried-air drier outlet actual pressure
Testing result is simultaneously fed back to controller by value P8, and controller receives the detected value of the 4th pressure transmitter feedback and by P8 and P4
Make comparisons, if P8 ＜ P4, control alarm sounds.
Beneficial effect：
The invention provides a kind of medical compressed air feedway and its control method, the present invention is empty by being set up in parallel first
Press and the second air compressor machine, and the first magnetic valve and first pressure transmitter are set in the outlet of the first air compressor machine, it is empty second
Press outlet sets the second magnetic valve and second pressure transmitter, obtains the first air compressor machine or the second pneumatics in real time by controller
The outlet air pressure of machine simultaneously makees to judge, in time use and the stand-by state of the first air compressor machine of switching and the second air compressor machine, it is ensured that begin
There is an air compressor machine eventually in stable operation, stable air pressure is constantly provided, by the cushioning effect of air accumulator, further improve
The stability of compressed air, it is ensured that use the life security of the patient of respirator.
Brief description of the drawings
The fundamental diagram for the medical compressed air feedway that Fig. 1 provides for the present invention.
In the medical compressed air feedway that Fig. 2 provides for the present invention, the cooling of the first air compressor machine and the second air compressor machine
Water system fundamental diagram.
In the medical compressed air feedway that Fig. 3 provides for the present invention, the fundamental diagram of adsorbing air drier.
The FB(flow block) of the control method for the medical compressed air feedway that Fig. 4 provides for the present invention.
Embodiment
The present invention provides a kind of medical compressed air feedway and its control method, to make the purpose of the present invention, technology
Scheme and effect are clearer, clear and definite, and the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.It should manage
Solution, specific embodiment described herein only to explain the present invention, is not intended to limit the present invention.
Referring initially to Fig. 1, the present invention provides a kind of medical compressed air feedway, including the be set up in parallel
One air compressor machine 110 and the second air compressor machine 120, the air accumulator 20 being sequentially connected, the first filter 31, the second filter 32, air
Drying machine 40 and sterilizing filter 33, and controller（Not shown in figure）；The outlet conduit of first air compressor machine 110 and
It is connected after the outlet conduit of two air compressor machines 120 is in parallel with the import of air accumulator 20；Set on the outlet conduit of first air compressor machine
It is equipped with the magnetic valve 61 of first pressure transmitter 51 and first, the outlet conduit of second air compressor machine and is provided with second pressure change
Send the magnetic valve 62 of device 52 and second；It is provided with the 3rd pressure transmitter 53, the outlet conduit of air accumulator and sets on the air accumulator
It is equipped with the 3rd magnetic valve 63；The 4th pressure transmitter 54 is provided with the outlet conduit of the dried-air drier；Above-mentioned first is empty
Press 110, the second air compressor machine 120, first pressure transmitter 51, second pressure transmitter 52, the 3rd pressure transmitter the 53, the 4th
Pressure transmitter 54, the first magnetic valve 61, the second magnetic valve 62 and the 3rd magnetic valve 63 are connected with the controller respectively.
During work, start the first air compressor machine, the first magnetic valve and open, and the second air compressor machine is in stand-by state, the second electricity
Magnet valve is closed.Compressed air is delivered to by the first air compressor machine enters row buffering to provide stable air pressure in air accumulator, when the 3rd pressure
When the air pressure that power transmitter detects air accumulator reaches normal value, the 3rd magnetic valve is opened, and compressed air enters the first filter
Filtered with the second filtering, to remove the formation pure air of the impurity in compressed air, the compressed air after filtering enters one
Stepping, which enters in dried-air drier, to be dried, and dried compressed air further has aseptic filtration, and it is filtered, and is finally used
Used in being delivered to respirator again with oxygen mix for patient.A safety hair is provided with the top of the air accumulator, works as gas storage
The then safety valve automatic take-off when air pressure exceedes safety value in tank, so as to avoid superpressure in air accumulator.
When controller receives first pressure transmitters sense to the first air compressor machine outlet actual pressure value beyond normal model
Enclose, then controller controls the first air compressor machine out of service, the first closed electromagnetic valve, the unlatching of the second air compressor machine, the second electromagnetism respectively
Valve is opened, it is ensured that the device can constantly provide the air of steady pressure, and work as maintenance personal by the first air compressor machine failure
After exclusion, the first air compressor machine is set to access again in the medical compressed air feedway and in stand-by state.If control
Device receives second pressure transmitters sense and exceeds normal range (NR) to the second air compressor machine outlet actual pressure value, then controller is distinguished
The second air compressor machine out of service, the second closed electromagnetic valve, the first air compressor machine is controlled to open, the first magnetic valve is opened.So circulation
Repeatedly switch the running status of the first air compressor machine and the second air compressor machine, it is ensured that have one all the time in medical compressed air feedway
Platform air compressor machine is normally being run, and automatic switching procedure is rapid, therefore can constantly provide stable compressed gas, it is ensured that made
With the life security of the patient of respirator.
Preferably, first filter 31 is that the second filter 32 is oil removal filter, so as to remove except water filter
The aqueous water and oil carried in compressed air.Preferably, the air compressor machine 120 of the first air compressor machine 110 and second is piston type
Air compressor.
The first described air compressor machine and the specification of the second air compressor machine are identical, as shown in Fig. 2 first air compressor machine and second
Air compressor machine respectively include a set of cooling water system, every suit cooling water system respectively include water pump 73, the first water tank 711,
Second water tank 712, cooling water pipe 76, the first water tank inlet solenoid valve 751, the first tank outlet magnetic valve 721, the second water tank enter
The mouth tank outlet magnetic valve 722 of magnetic valve 752 and second；The outlet conduit of the water tank 712 of first water tank 711 and second is in parallel
The import of water pump is connected afterwards, and cooling water pipe is connected to after the inlet pipeline parallel connection of the first water tank 711 and the second water tank 712（This
Section cooling water pipe particularly belongs to return pipe）One end, cooling water pipe（This section of cooling water pipe particularly belongs to water inlet pipe）It is another
End is connected to the outlet of water pump；Above-mentioned water pump 73, the first water tank inlet solenoid valve 751, the first tank outlet magnetic valve 721,
Two water tank inlet solenoid valves 752 and the second tank outlet magnetic valve 722 are connected with controller respectively.Above-mentioned cooling water pipe also includes
Some branch pipes, some branch pipes are connected to the air inlet cylinder of air compressor machine, interlayer of exhaust cylinder etc., during this is prior art, Fig. 2
It is not shown.
During compressor operation, a water tank is in use state in the first water tank and the second water tank, and another is in standby
State, at regular intervals after, the use state and stand-by state of the first water tank and the second water tank are once switched.For example,
First water tank was used after a period of time, and water temperature is gradually increasing, then closed the first water tank inlet solenoid valve and the first tank outlet electricity
Magnet valve, opens the second water tank inlet solenoid valve and the second tank outlet magnetic valve, thereby using the cooling water in the second water tank, and
Cooling water can pass through natural cooling in first water tank.After the second water tank uses a period of time, the first water tank is switched to again, such as
This circulation repeatedly switches the first water tank and the second water tank, it is ensured that recirculated water is in normal temperature model all the time in cooling water system
Enclose.Particularly when environment temperature is more relatively low, the energy-saving effect of cooling circulating water is obvious through the above way.
Further, when summer high temperature, only lead to natural cooling and be difficult to the water in water tank being quickly cooled to normal range (NR),
In this regard, the present embodiment is further improved, a pipe wing is respectively arranged with the cooling water pipe of every suit cooling water system
Formula heat exchanger 741, and the blower fan 742 being correspondingly arranged with fin-tube type heat exchanger；Each described blower fan 742 connects with controller respectively
Connect.That is, summer high temperature when, start condenser fan, recirculated water can obtain obvious radiating and cooling by fin-tube type heat exchanger, protect
Card compressor is normally run.
Further, described medical compressed air feedway, in addition to the display, outer being connected respectively with controller
Portion's input equipment and alarm（Not shown in figure）.The display can be used for showing the medical compressed air feedway
Running status and fault message, such as：First air compressor machine outlet air pressure, the second air compressor machine outlet air pressure, air pressure, air in surge tank
Drying machine outlet air pressure etc..
Preferably, the dried-air drier 40 is absorption drier.
Further, it is contemplated that adsorbent because extrude and impact under can produce dust, the outlet of the drying machine with it is degerming
A dust removal filter is additionally provided between the import of filter（Not shown in figure）, the filtering accuracy of the dust removal filter for 1 ~
5 microns, so that it is guaranteed that providing the air of dried and clean.
In described medical compressed air feedway, described controller can be PLC（Programmable logic controller (PLC)）.
In addition, for the setting of controller, the present embodiment also provides a kind of cost lower scheme：The controller includes passing through serial ports
First DSP of connection（I.e.：Digital Signal Process, Digital Signal Processing）Controller and the second dsp controller（Figure
Not shown in）；First air compressor machine, first pressure transmitter, the 3rd pressure transmitter, the 4th pressure transmitter, the first electricity
The water pump of magnet valve and the first cooling water system of air compressor, the first water tank inlet solenoid valve, the first tank outlet magnetic valve,
Two water tank inlet solenoid valves and the second tank outlet magnetic valve respectively with the first dsp controller；Second air compressor machine, the second pressure
Power transmitter, the water pump of the second magnetic valve and the second cooling water system of air compressor, the first water tank inlet solenoid valve, the first water
Case outlet solenoid valve, the second water tank inlet solenoid valve and the second tank outlet magnetic valve respectively with the second dsp controller；It is described aobvious
Show that device, external input device, alarm and two condenser fans also connect the second dsp controller.Wherein, the drive of the first air compressor machine
Dynamic motor connects the first dsp controller by one piece of L298 motors driving plate, and the motor of the second air compressor machine passes through one piece
L298 motors driving plate connects the second dsp controller；Each above-mentioned magnetic valve is connected to corresponding by a relay respectively
First controller or the second dsp controller.Two pieces of dsp controllers are connected by serial ports in such scheme, i.e., there is provided enough
I/O interfaces are greatly reduced with ensureing normally to control the medical compressed air feedway compared to PLC costs.
Further, it is contemplated that absorption drier only has two absorbing cylinders in the prior art, if in two absorbing cylinders
Adsorbent fail simultaneously and then compressed air can be caused fully to dry, threaten the patient breathed using respirator
Life security, the present embodiment is further improved there is provided a kind of dried-air drier, can be with the drying process for meeting compressed air
It is continued for.
Referring to Fig. 3, described adsorbing air drier includes three absorbing cylinders 410 being vertically arranged, inlet manifolds
481st, outlet house steward 482 and and drier controller（Not shown in figure）, the drier controller is preferably single-chip microcomputer；It is described
The inlet pipeline of each absorbing cylinder 410 is connected in parallel to inlet manifold 481, the outlet pipe at each top of absorbing cylinder 410
It is connected in parallel to outlet house steward 482；On the admission line of each absorbing cylinder bottom a magnetic valve A is provided with pipeline
（421）；Pass through a magnetic valve B between the outlet conduit of any two absorbing cylinder respectively（422）Connection；Each described suction
The bottom of attached cylinder, which is respectively arranged with a blast pipe 440, every blast pipe, is respectively arranged with a magnetic valve C（423）；It is above-mentioned
Each magnetic valve A（421）, magnetic valve B（422）With magnetic valve C（423）It is connected respectively with the controller., should in practical application
Adsorbing air drier is additionally provided with a underframe（Not shown in figure）, each absorbing cylinder passes through two or three supporting legs respectively
（Not shown in figure）It is vertically arranged on the underframe, drier controller is arranged on the underframe.Preferably, in each absorbing cylinder
It is respectively arranged with activated alumina adsorbents.
Set by the way that above-mentioned setting is described, the adsorbing air drier often runs certain time（I.e. one operation week
Phase）, controller is by controlling the opening and closing state of each magnetic valve, and the use state to three absorbing cylinders switches, and realizes
All the time absorbing cylinder is in use state in three absorbing cylinders, an absorbing cylinder is in adsorbent reactivation state, standby
Adsorbent in absorbing cylinder ensure that the absorbing cylinder can smoothly complete a cycle of operation after putting into operation.Each absorbing cylinder
State switches according to the sequential loop of " use ", " regeneration " and " standby ".
For the ease of illustrating, three absorbing cylinders are respectively designated as the first absorbing cylinder, the second suction from left to right as shown in accompanying drawing 1
Attached cylinder and the 3rd absorbing cylinder.Carried out below so that the use of the first absorbing cylinder, the second absorbing cylinder regenerate and the 3rd absorbing cylinder is standby as an example
Explain.
The magnetic valve A and magnetic valve B of first absorbing cylinder are opened, and remaining magnetic valve A and magnetic valve B are closed；First absorption
Magnetic valve B on the outlet conduit of cylinder and the second absorbing cylinder is opened, and two other magnetic valve B is closed；The electromagnetism of second absorbing cylinder
Valve C is opened, and other two magnetic valve C is closed.Compressed air enters inlet manifold, subsequently into the bottom of the first absorbing cylinder, warp
Adsorbent in first absorbing cylinder is discharged from top after drying and is divided into two strands of air, and wherein one air enters outlet house steward,
One enters the top of the second absorbing cylinder, and the moisture for the adsorbent for taking away the second absorbing cylinder that flows downward, and is finally inhaled by second
The blast pipe discharge of attached cylinder, so as to realize the regeneration of adsorbent in the second absorbing cylinder.And in the 3rd standby absorbing cylinder, then by
Quality inspection personnel detection and analysis confirms whether its adsorbent fails, and judges that adsorbent ensure that the absorbing cylinder is smoothly completed down
One cycle of operation, if can not if make and change the instruction of adsorbent, adsorbent is changed by operating personnel.Actual fortune
During row, the cycle of states switching of three absorbing cylinders, every time after switching, quality inspection personnel is all needed to the absorbing cylinder in stand-by state
Adsorbent is tested and analyzed, so that confirm, every time after switching absorbing cylinder running status, that absorbing cylinder in use state
In adsorbent can smoothly complete a cycle of operation so that ensure that the drying machine can constantly, fully to compression
Air is dried.
Referring to Fig. 4, for above-mentioned medical compressed air feedway, the present invention also provides corresponding control method, should
Control method comprises the following steps：
The lower limit P1 and upper limit P2 of the outlet atmospheric pressure value of the first air compressor machine and the second air compressor machine, gas storage are preset in S100, controller
Tank atmospheric pressure value P3, dried-air drier outlet atmospheric pressure value P4；
S200, controller receive start-up command, and the first magnetic valve opening, the second closed electromagnetic valve, the first pneumatics are controlled respectively
Machine is run;That is the motor of the first air compressor machine is rotated, and starts compressed air；Then first air compressor machine performs step simultaneously after starting
Rapid S310 and step S320；
Testing result is simultaneously fed back to controller by S310, the actual pressure value P5 in the 3rd pressure transmitter detection air accumulator, is controlled
Device processed receives the detected value of the 3rd pressure transmitter feedback and P5 and P3 makes comparisons, if P4 ＜ P3, the electricity of control the 3rd
Magnet valve is closed, if P4 >=P3, and the 3rd magnetic valve of control is opened；I.e., it is ensured that air accumulator can provide the pressure of steady pressure
Contracting air；
Testing result is simultaneously fed back to control by S320, the air compressor machine of first pressure transmitters sense first outlet actual pressure value P6
Device, controller receives the detected value of first pressure transmitter feedback and P6 makes comparisons with P1 and P2, if P1≤P6≤P2,
Then keep the first air compressor machine to continue to run with, if P6 ＜ P1 or P6 ＞ P2, controller control respectively the first closed electromagnetic valve,
Second magnetic valve is opened, the first air compressor machine is out of service, the second compressor operation, then then performs step S330；
Testing result is simultaneously fed back to control by S330, the air compressor machine of second pressure transmitters sense second outlet actual pressure value P7
Device, controller receives the and the detected value of pressure transmitter feedback and P7 made comparisons with P1 and P2, if P1≤P7≤P2,
Then keep the second air compressor machine to continue to run with, if P7 ＜ P1 or P7 ＞ P2, controller control respectively the second closed electromagnetic valve,
First magnetic valve is opened, the second air compressor machine is out of service, the first compressor operation, then then performs step S320.
Above-mentioned steps S320 and S330 cyclic switching, it is ensured that have an air compressor machine all the time in stable operation, it is to avoid do not have
The super normal range (NR) of compressed air pressure or the compressed air cutout for having stand-by compressor or manual switching compressor and causing,
So as to ensure that the life security of the patient using respirator.
Further, the step S100 also includes：The first water tank and the second water tank switching interval are preset in the controller
Time T1；
The step S320 also includes：Control controls the water pump operation of the first air compressor machine, the first water tank inlet solenoid valve to open respectively
Open, the first tank outlet magnetic valve is opened, the second water tank inlet solenoid valve is closed, the second tank outlet closed electromagnetic valve；Hereafter
After per elapsed time T1, controller controls the first water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank to enter respectively
The opening and closing state of mouth magnetic valve and the second tank outlet magnetic valve is once switched；
The step S330 also includes：Control controls the water pump operation of the second air compressor machine, the first water tank inlet solenoid valve to open respectively
Open, the first tank outlet magnetic valve is opened, the second water tank inlet solenoid valve is closed, the second tank outlet closed electromagnetic valve；Hereafter
After per elapsed time T1, controller controls the first water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank to enter respectively
The opening and closing state of mouth magnetic valve and the second tank outlet magnetic valve is once switched.
In such scheme, realize the cooling water system of the first air compressor machine and the second air compressor machine by switch the first water tank and
Use and stand-by state with the second water tank, are realized and circulating water natural are cooled, it is ensured that the temperature of recirculated water is in just
In normal scope.In addition, when summer high temperature, by controller condenser fan can be controlled to run, the cooling effect of recirculated water is improved
Really.
Further, the step S310 also includes：4th pressure transmitter detection dried-air drier outlet actual pressure
Testing result is simultaneously fed back to controller by value P8, and controller receives the detected value of the 4th pressure transmitter feedback and by P8 and P4
Make comparisons, if P8 ＜ P4, control alarm sounds.
In summary, the present invention goes out by being set up in parallel the first air compressor machine and the second air compressor machine, and in the first air compressor machine
Mouth sets the first magnetic valve and first pressure transmitter, and the second magnetic valve and second pressure pick-up are set in the outlet of the second air compressor machine
Device, the outlet air pressure of the first air compressor machine or the second air compressor machine is obtained by controller and makees to judge in real time, and switching first is empty in time
The use of press and the second air compressor machine and stand-by state, it is ensured that have an air compressor machine all the time in stable operation, constantly provide
Stable air pressure.By setting the first water tank, the second water respectively in the cooling water system of the first air compressor machine and the second air compressor machine
Case and fin-tube type heat exchanger and condenser fan so that the recirculated water in each cooling water system is in normal temperature, it is ensured that pneumatics
Machine can normally be run.Water filter and oil removal filter are removed by being set before dried-air drier import, it is ensured that be air-dried
The adsorbent of machine is not lost activity by oil film effect, by setting dust removal filter in dried-air drier outlet conduit, it is ensured that
The dust carried in dried gas is filtered.
It is understood that for those of ordinary skills, can be with technique according to the invention scheme and its hair
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect scope.
Claims (10)
1. a kind of medical compressed air feedway, it is characterised in that including the first air compressor machine and the second pneumatics being set up in parallel
Machine, the air accumulator being sequentially connected, the first filter, the second filter, dried-air drier and sterilizing filter, and controller；
It is connected after the outlet conduit of first air compressor machine and the outlet conduit of the second air compressor machine are in parallel with the import of air accumulator；Described
First pressure transmitter and the first magnetic valve, the outlet conduit of second air compressor machine are provided with the outlet conduit of one air compressor machine
On be provided with second pressure transmitter and the second magnetic valve；The 3rd pressure transmitter is provided with the air accumulator, air accumulator
The 3rd magnetic valve is provided with outlet conduit；The 4th pressure transmitter is provided with the outlet conduit of the dried-air drier；On
State the first air compressor machine, the second air compressor machine, first pressure transmitter, second pressure transmitter, the 3rd pressure transmitter, the 4th pressure
Transmitter, the first magnetic valve, the second magnetic valve and the 3rd magnetic valve are connected with the controller respectively.
2. medical compressed air feedway according to claim 1, it is characterised in that first air compressor machine and second
Air compressor machine is piston type air compressor.
3. medical compressed air feedway according to claim 2, it is characterised in that first air compressor machine and second
Air compressor machine includes a set of cooling water system respectively, and every suit cooling water system includes water pump, the first water tank, the second water respectively
Case, cooling water pipe, the first water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank inlet solenoid valve and the second water
Case outlet solenoid valve；Connect the import of water pump after the outlet conduit of first water tank and the second water tank is in parallel, the first water tank and
One end of cooling water pipe is connected to after the inlet pipeline of second water tank is in parallel, the other end of cooling water pipe is connected to going out for water pump
Mouthful；Above-mentioned water pump, the first water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank inlet solenoid valve and the second water
Case outlet solenoid valve is connected with controller respectively.
4. medical compressed air feedway according to claim 3, it is characterised in that every suit cooling water system
Cooling water pipe on be respectively arranged with a fin-tube type heat exchanger, and the blower fan being correspondingly arranged with fin-tube type heat exchanger；It is described
Each blower fan is connected with controller respectively.
5. medical compressed air feedway according to claim 4, it is characterised in that also including connecting respectively with controller
Display, external input device and the alarm connect.
6. the medical compressed air feedway according to claim 1 or 4, it is characterised in that the dried-air drier is
Absorption drier.
7. medical compressed air feedway according to claim 4, it is characterised in that the controller is included by string
The first dsp controller and the second dsp controller of mouth connection；First air compressor machine, first pressure transmitter, the 3rd pressure become
Send water pump, the first water tank import electricity of device, the 4th pressure transmitter, the first magnetic valve and the first cooling water system of air compressor
Magnet valve, the first tank outlet magnetic valve, the second water tank inlet solenoid valve and the second tank outlet magnetic valve are controlled with the first DSP respectively
Device processed；Second air compressor machine, second pressure transmitter, the water pump of the second magnetic valve and the second cooling water system of air compressor,
First water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank inlet solenoid valve and the second tank outlet magnetic valve
Respectively with the second dsp controller.
8. the control method of medical compressed air feedway according to claim 5, it is characterised in that the controlling party
Method comprises the following steps：
The lower limit P1 and upper limit P2 of the outlet atmospheric pressure value of the first air compressor machine and the second air compressor machine, gas storage are preset in S100, controller
Tank atmospheric pressure value P3, dried-air drier outlet atmospheric pressure value P4；
S200, controller receive start-up command, and the first magnetic valve opening, the second closed electromagnetic valve, the first pneumatics are controlled respectively
Machine is run;Then step S310 and step S320 is performed simultaneously；
Testing result is simultaneously fed back to controller by S310, the actual pressure value P5 in the 3rd pressure transmitter detection air accumulator, is controlled
Device processed receives the detected value of the 3rd pressure transmitter feedback and P5 and P3 makes comparisons, if P4 ＜ P3, the electricity of control the 3rd
Magnet valve is closed, if P4 >=P3, and the 3rd magnetic valve of control is opened；
Testing result is simultaneously fed back to control by S320, the air compressor machine of first pressure transmitters sense first outlet actual pressure value P6
Device, controller receives the detected value of first pressure transmitter feedback and P6 makes comparisons with P1 and P2, if P1≤P6≤P2,
Then keep the first air compressor machine to continue to run with, if P6 ＜ P1 or P6 ＞ P2, controller control respectively the first closed electromagnetic valve,
Second magnetic valve is opened, the first air compressor machine is out of service, the second compressor operation, then then performs step S330；
Testing result is simultaneously fed back to control by S330, the air compressor machine of second pressure transmitters sense second outlet actual pressure value P7
Device, controller receives the and the detected value of pressure transmitter feedback and P7 made comparisons with P1 and P2, if P1≤P7≤P2,
Then keep the second air compressor machine to continue to run with, if P7 ＜ P1 or P7 ＞ P2, controller control respectively the second closed electromagnetic valve,
First magnetic valve is opened, the second air compressor machine is out of service, the first compressor operation, then then performs step S320.
9. the control method of medical compressed air feedway according to claim 8, it is characterised in that
The step S100 also includes：The first water tank and the second water tank switching interval time T1 are preset in the controller；
The step S320 also includes：Control controls the water pump operation of the first air compressor machine, the first water tank inlet solenoid valve to open respectively
Open, the first tank outlet magnetic valve is opened, the second water tank inlet solenoid valve is closed, the second tank outlet closed electromagnetic valve；Hereafter
After per elapsed time T1, controller controls the first water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank to enter respectively
The opening and closing state of mouth magnetic valve and the second tank outlet magnetic valve is once switched；
The step S330 also includes：Control controls the water pump operation of the second air compressor machine, the first water tank inlet solenoid valve to open respectively
Open, the first tank outlet magnetic valve is opened, the second water tank inlet solenoid valve is closed, the second tank outlet closed electromagnetic valve；Hereafter
After per elapsed time T1, controller controls the first water tank inlet solenoid valve, the first tank outlet magnetic valve, the second water tank to enter respectively
The opening and closing state of mouth magnetic valve and the second tank outlet magnetic valve is once switched.
10. the control method of medical compressed air feedway according to claim 8, it is characterised in that the step
S310 also includes：Testing result is simultaneously fed back to control by the 4th pressure transmitter detection dried-air drier outlet actual pressure value P8
Device, controller receives the detected value of the 4th pressure transmitter feedback and P8 makes comparisons with P4, if P8 ＜ P4, control report
Alert device sounds.
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