CN108744100A - A kind of haemodialysis equipment and its back-flushing method with backwashing function - Google Patents
A kind of haemodialysis equipment and its back-flushing method with backwashing function Download PDFInfo
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- CN108744100A CN108744100A CN201810635416.9A CN201810635416A CN108744100A CN 108744100 A CN108744100 A CN 108744100A CN 201810635416 A CN201810635416 A CN 201810635416A CN 108744100 A CN108744100 A CN 108744100A
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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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1601—Control or regulation
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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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1621—Constructional aspects thereof
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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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/168—Sterilisation or cleaning before or after use
- A61M1/1682—Sterilisation or cleaning before or after use both machine and membrane module, i.e. also the module blood side
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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
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/04—Liquids
- A61M2202/0413—Blood
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- Urology & Nephrology (AREA)
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Abstract
The invention discloses a kind of haemodialysis equipments with backwashing function, including inlet tube, dialyse mechanism, dialysis liquid pipe, heating device and outlet tube, the both ends of the dialysis mechanism are connected separately with inlet tube and outlet tube, inlet tube solenoid valve and liquid feeding pump are installed on inlet tube, outlet tube solenoid valve and Pump for giving-out are installed on the outlet tube, one side position of dialysis mechanism is also associated with dialysis liquid pipe, dialysate pump and dialysis liquid pipe solenoid valve are installed in dialysis liquid pipe, the end for liquid pipe of dialysing is connect with the dialysis liquid case for storing dialyzate, the outlet tube is connect with heating device, the beneficial effects of the invention are as follows：Polypropylene screen and poly (ether sulfone) film have hydrophily, and are filtered using film, and flux is big, reduces dialysis time, and can carry out backsurging operation automatically according to pressure difference, greatly improve the service life of dialysis mechanism.
Description
Technical field
The present invention relates to a kind of dialysis apparatus, specifically a kind of haemodialysis equipment and its recoil with backwashing function
Washing method.
Background technology
Hemodialysis clinic means that some wastes in blood are removed by semipermeable membrane.Haemodialysis is a kind of relatively peace
Entirely, one of easy, widely used blood purification method.Dialysis refers to solute by semi-permeable membrane, from highly concentrated solution to low dense
Spend direction movement.Haemodialysis includes the movement of solute and the movement of water, i.e., blood and dialyzate are in dialyzer (artificial kidney)
Mass exchange is carried out by means of semi-permeable membrane contact and concentration gradient, metabolic waste and excessive electrolyte in blood is made to be moved to dialyzate
Dynamic, calcium ion, base in dialyzate etc. are moved into blood.If the mixed liquor of albumin and urea is put into dialyzer
In, pipe exterior-applied liquid medicine impregnates, and at this moment the urea in dialyzer pipe will be shifted to by artificial kidney fenestra in the water outside pipe, albumin point
Son is larger, cannot pass through fenestra.This small-molecule substance can by by macromolecular substances cannot be moved by the substance of semi-permeable membrane
Phenomenon is known as disperse.It is clinically haemodialysis to isolate and purify blood to make up to the method for purifying purpose with diffusing phenomenon
Basic principle.
And after the completion of dialysing, the surface of dialyzer inner filter core can be attached with a large amount of impurity, microorganism, inconvenience cleaning.
Invention content
The purpose of the present invention is to provide a kind of haemodialysis equipment and its back-flushing method with backwashing function, with
Solve the problems mentioned above in the background art.
To achieve the above object, the present invention provides the following technical solutions：
A kind of haemodialysis equipment with backwashing function, including inlet tube, dialysis mechanism, dialysis liquid pipe, heating dress
It sets and outlet tube, the both ends of the dialysis mechanism is connected separately with inlet tube and outlet tube, inlet tube electricity are equipped on inlet tube
Magnet valve and liquid feeding pump are equipped with outlet tube solenoid valve and Pump for giving-out on the outlet tube, and a side position of the mechanism that dialyses is also connected with
Have a dialysis liquid pipe, dialysate pump and dialysis liquid pipe solenoid valve be installed in liquid pipe of dialysing, the end for liquid pipe of dialysing with for storing
The dialysis liquid case connection of liquid is analysed, the outlet tube is connect with heating device, and backwash tube is also associated on the outlet tube, is recoiled
Wash and backwashing solenoid valve and backwashing pump be installed on pipe, be separately installed on the inlet tube and outlet tube inlet hydraulic meter and
Fluid pressure meter, inlet tube solenoid valve, liquid feeding pump, inlet hydraulic meter, dialysate pump, dialysis liquid pipe solenoid valve, outlet tube solenoid valve,
Pump for giving-out, fluid pressure meter, backwashing solenoid valve and backwashing pump are electrically connected with PLC controller.
As a further solution of the present invention：Backwash tube pressure gauge, backwash tube pressure are installed on the backwash tube
Power meter is equally electrically connected with PLC controller.
As further scheme of the invention：The dialysis mechanism includes shell, end plate and central tube, is passed through in shell
End plate is separated into mutual disconnected two parts, and middle and upper part point is connect with inlet tube, and lower part is then connect with outlet tube, described
Central tube is installed inside the shell by end plate, and central tube is the structure that one end open is closed in one end, and the open end of central tube is from end
It is stretched out at plate, offers several micropores on the tube wall of central tube, the external stability of central tube has several polypropylene screens, adjacent two layers
Polypropylene screen between be equipped with poly (ether sulfone) film, equally offer several micropores on polypropylene screen and poly (ether sulfone) film, polypropylene screen and
Poly (ether sulfone) film is placed in the upper part in shell, and polypropylene screen and poly (ether sulfone) film are fixed by positioning plate.
As further scheme of the invention：It is also equipped with the flow distribution plate of arc in the shell, is opened up on flow distribution plate
There are multiple through-holes.
As further scheme of the invention：The micro-pore diameter opened up on the central tube is not less than polypropylene screen and gathers
The micro-pore diameter opened up on ether sulfone film.
As further scheme of the invention：The heating device includes electrothermal tube and is encapsulated in changing in insulated case
The both ends of heat pipe, heat exchanger tube are connected separately with out liquid interface and into liquid interfaces, wherein being connected into the end of liquid interface and outlet tube.
As further scheme of the invention：The heat exchanger tube is helicoidal structure, and heat exchanger tube is around in electrothermal tube
It is external.
A kind of back-flushing method of the haemodialysis equipment with backwashing function, includes the following steps：
S1, PLC controller judge the pressure difference between inlet hydraulic meter and fluid pressure meter when haemodialysis latter end, work as pressure
When force difference is less than the threshold value of setting, after dialysis machine end of run or forced shutdown, backwash is executed according to judgement result decision
Operation；
S2 closes outlet tube solenoid valve, Pump for giving-out, dialysate pump and dialysis liquid pipe solenoid valve, open backwashing solenoid valve and
Flushing liquor is passed into dialysis mechanism by backwashing pump, at this point, backwash tube pressure gauge measure in real time backwash tube into hydraulic pressure
Power, and result is fed back into PLC controller；
S3, flushing liquor are backwashed pump and are pumped into central tube, and continue from poly (ether sulfone) film and polypropylene screen to external diffusion,
The impurity for being attached to poly (ether sulfone) film and polypropylene screen surface, microorganism etc. are washed away into the impurity totally flushed out, microorganism etc.
It is discharged in the top of shell, and from inlet tube, inlet hydraulic meter measures the pressure of inlet tube in real time at this time, and result is fed back to
PLC controller；
S4, until the difference between inlet hydraulic meter and backwash tube pressure gauge is less than setting value, PLC controller control is anti-
Flushing pump and backwashing solenoid valve are closed, and backwash stops, and extra flushing liquor is discharged from outlet tube.
As a further solution of the present invention：The flushing liquor is sterile distilled water or physiological saline.
Compared with prior art, the beneficial effects of the invention are as follows：Polypropylene screen and poly (ether sulfone) film have hydrophily, and profit
It is filtered with film, flux is big, reduces dialysis time, and can carry out backsurging operation automatically according to pressure difference, carries significantly
The service life of dialysis mechanism is risen.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the haemodialysis equipment with backwashing function.
Fig. 2 is a kind of structural schematic diagram of dialysis mechanism in haemodialysis equipment with backwashing function.
In figure：1- inlet tubes, 101- inlet tubes solenoid valve, 102- liquid feeding pumps, 103- inlet hydraulics meter, 2- dialysis mechanism,
201- shells, 202- flow distribution plates, 203- positioning plates, 204- central tubes, 205- end plates, 206- poly (ether sulfone) films, 207- polypropylene screens,
3- dialysis liquid pipe, 301- dialysate pumps, 302- dialysis liquid pipes solenoid valve, 4- backwash tubes, 401- backwashing solenoid valves, 402- recoils
Wash pump, 403- backwash tubes pressure gauge, 5- heating devices, 501- electrothermal tubes, 502- go out liquid interface, 503- heat exchanger tubes, 504- into
Liquid interface, 6- outlet tubes, 601- outlet tubes solenoid valve, 602- Pump for giving-out, 603- fluid pressure meters.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
Referring to Fig. 1, in the embodiment of the present invention, a kind of haemodialysis equipment with backwashing function, including inlet tube
1, the both ends of dialysis mechanism 2, dialysis liquid pipe 3, heating device 5 and outlet tube 6, the dialysis mechanism 2 are connected separately with inlet tube 1
With outlet tube 6, inlet tube solenoid valve 101 and liquid feeding pump 102 are installed on inlet tube 1, outlet tube is installed on the outlet tube 6
One side position of solenoid valve 601 and Pump for giving-out 602, dialysis mechanism 2 is also associated with dialysis liquid pipe 3, is equipped in liquid pipe 3 of dialysing
Analysis pump 301 and dialysis liquid pipe solenoid valve 302, also, the end for liquid pipe 3 of dialysing connects with the dialysis liquid case for storing dialyzate
It connects, for inputting dialyzate into dialysis mechanism 2, blood is input to by liquid feeding pump 102 in dialysis mechanism 2, by dialysis machine
After the filtering of 2 inner filter core of structure, impurity, microorganism in blood etc. are trapped, and clean blood then enters outlet tube 6 simultaneously
Outflow, the outlet tube 6 is connect with heating device 5, in addition, the main improvement of the present embodiment is：On the outlet tube 6 also
Be connected with backwash tube 4, backwashing solenoid valve 401 and backwashing pump 402 be installed on backwash tube 4, backwash tube 4 be used for
Input sterile distilled water or physiological saline in outlet tube 6 backwash the impurity in dialysis mechanism 2, and anti-in order to judge
It is separately installed with inlet hydraulic meter 103 and fluid pressure meter 603 on the opportunity of flushing, the inlet tube 1 and outlet tube 6, at this
In embodiment, inlet tube solenoid valve 101, liquid feeding pump 102, inlet hydraulic meter 103, dialysate pump 301, dialysis liquid pipe solenoid valve 302,
Outlet tube solenoid valve 601, Pump for giving-out 602, fluid pressure meter 603, backwashing solenoid valve 401 and backwashing pump 402 are controlled with PLC
Device processed is electrically connected.
The operation principle of the present embodiment is：Under normal circumstances, blood is input to by liquid feeding pump 102 in dialysis mechanism 2, warp
It crosses after the filtering of 2 inner filter core of dialysis mechanism, impurity, microorganism in blood etc. are trapped, and clean blood then enters
Outlet tube 6 simultaneously flows out, and inlet hydraulic meter 103 and fluid pressure meter 603 measure the pressure of inlet and outlet in real time, and pressure data is defeated
Go out to PLC controller, its pressure difference is judged by PLC controller, and be compared with the threshold value of setting, wait dialysis machines end of run
Or after forced shutdown, PLC controller determines a need for backwashing dialysis mechanism 2 according to pressure difference value, backwash
Detailed process is as follows：
Outlet tube solenoid valve 601, Pump for giving-out 602, dialysate pump 301 and dialysis liquid pipe solenoid valve 302 are closed, backwash is opened
Solenoid valve 401 and backwashing pump 402, sterile distilled water or physiological saline enter inside dialysis mechanism 2, to dialysis mechanism 2
Filter core is backwashed, and impurity, the microorganism etc. that are attached to outside filter core is broken up, and finally by the impurity gone out, microorganism
It is exported Deng from inlet tube 1.
Moreover, the effect of detection backwash for convenience and its terminal of judgement, are equipped with anti-on the backwash tube 4
Tube manometer 403 is rinsed, backwash tube pressure gauge 403 is equally electrically connected with PLC controller, by measuring backwash tube pressure
Pressure difference between meter 403 and fluid pressure meter 603, to judge the effect and terminal of backwash.
Embodiment 2
Referring to Fig. 2, the present embodiment is retouched to the detailed construction of dialysis mechanism 2 and heating device 5 in embodiment 1
It states, specifically：
(1) the dialysis mechanism 2 includes shell 1, end plate 205 and central tube 204, is separated by end plate 205 in shell 1
Mutual disconnected two parts, middle and upper part point are connect with inlet tube 1, and lower part is then connect with outlet tube 6, the central tube
204 are mounted on by end plate 205 in shell 1, and central tube 204 is the structure that one end open is closed in one end, the opening of central tube 204
End is stretched out from end plate 205, and several micropores are offered on the tube wall of central tube 204, and the external stability of central tube 204 has several gather
Propylene film 207, is equipped with poly (ether sulfone) film 206 between the polypropylene screen 207 of adjacent two layers, on polypropylene screen 207 and poly (ether sulfone) film 206
Several micropores are equally offered, polypropylene screen 207 and poly (ether sulfone) film 206 are placed in the upper part in shell 1, and polypropylene screen
207 and poly (ether sulfone) film 206 be fixed by positioning plate 203, when blood and dialyzate are entered in dialysis mechanism 2, pressure makes
Liquid is reached by poly (ether sulfone) film 206 and polypropylene screen 207 in central tube 204, and is finally flowed out from outlet tube 6.
It is also equipped with the flow distribution plate 202 of arc in the shell 1, multiple through-holes are offered on flow distribution plate 202, is used for blood
Liquid is uniformly imported into inside shell 1.
It is opened preferably, the micro-pore diameter opened up on central tube 204 is not less than on polypropylene screen 207 and poly (ether sulfone) film 206
If micro-pore diameter.
(2) heating device 5 includes electrothermal tube 501 and the heat exchanger tube 503 being encapsulated in insulated case, heat exchanger tube 503
Both ends be connected separately with out liquid interface 502 and into liquid interface 504, wherein connect into liquid interface 504 with the end of outlet tube 6,
Heat pipe 503 is exchanged by electrothermal tube 501 and carries out liquid feeding, realizes the heating to blood, and heat exchanger tube 503 and electrothermal tube 501 are not
It is in direct contact, is not easy to grow bacterium and fouling, in addition, temperature feedback mechanisms must be disposed in heating device 5, that is, control electric heating
The structure of 501 heating temperature of pipe, this part is same as the prior art, herein without extra narration.
The heat exchanger tube 503 is helicoidal structure, and heat exchanger tube 503 is around in the outside of electrothermal tube 501.
Embodiment 3
The present embodiment is explained to its dialysis process, specific as follows：
A kind of back-flushing method of the haemodialysis equipment with backwashing function, includes the following steps：
S1, PLC controller judge the pressure between inlet hydraulic meter 103 and fluid pressure meter 603 when haemodialysis latter end
Difference after dialysis machine end of run or forced shutdown, determines to execute when pressure difference is less than the threshold value of setting according to judgement result
Backsurging operation；
S2 closes outlet tube solenoid valve 601, Pump for giving-out 602, dialysate pump 301 and dialysis liquid pipe solenoid valve 302, opens anti-
Flushing liquor is passed into dialysis mechanism 2 by scouring electromagnetic valve 401 and backwashing pump 402, at this point, backwash tube pressure gauge 403 is real
When measure the inlet hydraulic of backwash tube 4, and result is fed back into PLC controller；
S3, flushing liquor are backwashed pump 402 and are pumped into central tube 204, and continue from poly (ether sulfone) film 206 and polypropylene screen
207, to external diffusion, impurity, the microorganism etc. of being attached to 207 surface of poly (ether sulfone) film 206 and polypropylene screen are washed away totally, rinsed
Impurity, microorganism for going out etc. are in the top of shell 1, and are discharged from inlet tube 1, at this time inlet hydraulic meter 103 measure in real time into
The pressure of liquid pipe 1, and result is fed back into PLC controller；
S4, until the difference between inlet hydraulic meter 103 and backwash tube pressure gauge 403 is less than setting value, PLC controller
It controls backwashing pump 402 and backwashing solenoid valve 401 is closed, backwash stops, and extra flushing liquor is discharged from outlet tube 6.
The flushing liquor is sterile distilled water or physiological saline.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (9)
1. a kind of haemodialysis equipment with backwashing function, including inlet tube (1), dialysis mechanism (2), dialysis liquid pipe (3),
The both ends of heating device (5) and outlet tube (6), the dialysis mechanism (2) are connected separately with inlet tube (1) and outlet tube (6), into
Inlet tube solenoid valve (101) and liquid feeding pump (102) are installed in liquid pipe (1), outlet tube electromagnetism is installed on the outlet tube (6)
One side position of valve (601) and Pump for giving-out (602), dialysis mechanism (2) is also associated with dialysis liquid pipe (3), pacifies in dialysis liquid pipe (3)
Equipped with dialysate pump (301) and dialysis liquid pipe solenoid valve (302), the end of dialysis liquid pipe (3) and the dialysis for storing dialyzate
Liquid case connects, and the outlet tube (6) connect with heating device (5), which is characterized in that is also associated on the outlet tube (6) anti-
Flush pipe (4), is equipped with backwashing solenoid valve (401) and backwashing pump (402) on backwash tube (4), the inlet tube (1) and
Inlet hydraulic meter (103) and fluid pressure meter (603), inlet tube solenoid valve (101), feed liquor are separately installed on outlet tube (6)
Pump (102), dialysate pump (301), dialysis liquid pipe solenoid valve (302), outlet tube solenoid valve (601), goes out inlet hydraulic meter (103)
Liquid pump (602), fluid pressure meter (603), backwashing solenoid valve (401) and backwashing pump (402) electrically connect with PLC controller
It connects.
2. a kind of haemodialysis equipment with backwashing function according to claim 1, which is characterized in that the recoil
It washes on pipe (4) and backwash tube pressure gauge (403) is installed, backwash tube pressure gauge (403) equally electrically connects with PLC controller
It connects.
3. a kind of haemodialysis equipment with backwashing function according to claim 1, which is characterized in that the dialysis
Mechanism (2) includes shell (1), end plate (205) and central tube (204), is separated by end plate (205) in shell (1) and is not connected mutually
Two logical parts, middle and upper part point are connect with inlet tube (1), and lower part is then connect with outlet tube (6), the central tube
(204) it is mounted in shell (1) by end plate (205), central tube (204) is the structure that one end open is closed in one end, central tube
(204) open end is stretched out at end plate (205), and several micropores, central tube (204) are offered on the tube wall of central tube (204)
External stability have several polypropylene screens (207), poly (ether sulfone) film (206) is equipped between the polypropylene screen (207) of adjacent two layers, is gathered
Several micropores are equally offered on propylene film (207) and poly (ether sulfone) film (206), polypropylene screen (207) and poly (ether sulfone) film (206) are equal
It is placed in the upper part in shell (1), and polypropylene screen (207) and poly (ether sulfone) film (206) are fixed by positioning plate (203).
4. a kind of haemodialysis equipment with backwashing function according to claim 3, which is characterized in that the shell
(1) flow distribution plate (202) of arc is also equipped in, flow distribution plate offers multiple through-holes on (202).
5. a kind of haemodialysis equipment with backwashing function according to claim 3, which is characterized in that the center
The micro-pore diameter opened up on pipe (204) is not less than the micro-pore diameter opened up on polypropylene screen (207) and poly (ether sulfone) film (206).
6. a kind of haemodialysis equipment with backwashing function according to claim 1, which is characterized in that the heating
Device (5) includes electrothermal tube (501) and the heat exchanger tube (503) being encapsulated in insulated case, and the both ends of heat exchanger tube (503) connect respectively
Liquid interface (502) is connected to out and into liquid interface (504), wherein being connect into liquid interface (504) with the end of outlet tube (6).
7. a kind of haemodialysis equipment with backwashing function according to claim 6, which is characterized in that the heat exchange
It is helicoidal structure to manage (503), and heat exchanger tube (503) is around in the outside of electrothermal tube (501).
8. a kind of back-flushing method according to any haemodialysis equipments with backwashing function of claim 1-7,
It is characterized by comprising the following steps：
S1, PLC controller judge the pressure between inlet hydraulic meter (103) and fluid pressure meter (603) when haemodialysis latter end
Difference after dialysis machine end of run or forced shutdown, determines to execute when pressure difference is less than the threshold value of setting according to judgement result
Backsurging operation；
S2 closes outlet tube solenoid valve (601), Pump for giving-out (602), dialysate pump (301) and dialysis liquid pipe solenoid valve (302), beats
Backwashing solenoid valve (401) and backwashing pump (402) are opened, flushing liquor is passed into dialysis mechanism (2), at this point, backwash tube
Pressure gauge (403) measures the inlet hydraulic of backwash tube (4) in real time, and result is fed back to PLC controller；
S3, flushing liquor are backwashed pump (402) and are pumped into central tube (204), and continue from poly (ether sulfone) film (206) and polypropylene
Film (207) washes away impurity, the microorganism etc. of being attached to poly (ether sulfone) film (206) and polypropylene screen (207) surface dry to external diffusion
Only, impurity, microorganism for flushing out etc. are in the top of shell (1), and are discharged from inlet tube (1), at this time inlet hydraulic meter
(103) pressure of inlet tube (1) is measured in real time, and result is fed back into PLC controller；
S4, until the difference between inlet hydraulic meter (103) and backwash tube pressure gauge (403) is less than setting value, PLC controller
It controls backwashing pump (402) and backwashing solenoid valve (401) is closed, backwash stops, and extra flushing liquor is arranged from outlet tube (6)
Go out.
9. a kind of back-flushing method of haemodialysis equipment with backwashing function according to claim 8, feature
It is, the flushing liquor is sterile distilled water or physiological saline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810635416.9A CN108744100A (en) | 2018-06-20 | 2018-06-20 | A kind of haemodialysis equipment and its back-flushing method with backwashing function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810635416.9A CN108744100A (en) | 2018-06-20 | 2018-06-20 | A kind of haemodialysis equipment and its back-flushing method with backwashing function |
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| CN108744100A true CN108744100A (en) | 2018-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110575579A (en) * | 2019-09-23 | 2019-12-17 | 中国科学技术大学 | Dialysis-enhanced hemodialyzer capable of improving blood flow |
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