CN116832245A - Dialysate temperature control system and method - Google Patents
Dialysate temperature control system and method Download PDFInfo
- Publication number
- CN116832245A CN116832245A CN202310886421.8A CN202310886421A CN116832245A CN 116832245 A CN116832245 A CN 116832245A CN 202310886421 A CN202310886421 A CN 202310886421A CN 116832245 A CN116832245 A CN 116832245A
- Authority
- CN
- China
- Prior art keywords
- temperature
- dialysate
- temperature control
- pipeline
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000004321 preservation Methods 0.000 claims abstract description 24
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 14
- 239000008280 blood Substances 0.000 claims description 6
- 210000004369 blood Anatomy 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001631 haemodialysis Methods 0.000 description 2
- 230000000322 hemodialysis Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007485 conventional hemodialysis Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- A61M1/1654—Dialysates therefor
-
- 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
- A61M1/1654—Dialysates therefor
- A61M1/1656—Apparatus for preparing dialysates
- A61M1/166—Heating
- A61M1/1664—Heating with temperature 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
- 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
- A61M1/1654—Dialysates therefor
- A61M1/1656—Apparatus for preparing dialysates
- A61M1/1668—Details of containers
-
- 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
- A61M2205/3368—Temperature
-
- 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
Abstract
The invention belongs to the technical field of temperature control, and provides a dialysate temperature control system and a dialysate temperature control method, wherein a first temperature measurement component is arranged on a heat preservation cavity to measure the temperature of a dialysate bag; the first temperature measuring assembly and the second temperature measuring assembly for measuring the liquid in the pipeline are electrically connected with the temperature control unit, and the temperature control unit controls the working power of the first heating assembly according to the measured temperature data so as to enable the temperature of the dialysate to be at a constant value. The invention has the advantages that the temperature control is carried out by adopting a dual-sensor temperature acquisition mode, one side is the real-time measurement of the liquid temperature in the pipeline, the other side is the real-time measurement of the temperature of the heat preservation cavity, the accuracy of the temperature control is improved by adopting a dual-state quantity input single control quantity output mode, the influence caused by hysteresis is reduced, and the accurate control of the dialysate temperature is achieved.
Description
Technical Field
The invention relates to the technical field of temperature control, in particular to a dialysate temperature control system and method.
Background
For devices such as conventional hemodialysis machines and portable hemodialysis machines, the dialysate and the blood of a patient cause blood temperature changes in the dialysis process, and in order to reduce discomfort caused by blood backflow to the human body, the dialysate is usually required to be heated to be close to normal body temperature. In the automatic control theory, common heating algorithms mainly include PID algorithms and modifications thereof, which are collectively referred to herein as PID-like algorithms. The key point of the PID-like algorithm is that the coefficients of the proportion P, the integral I and the derivative D are found according to the input, the output and the feedback of the system, the three coefficients have no specific physical significance, and the coefficients need to be summarized in a large amount of test data, so that the difficulty is high and the uncertainty is high. The conventional common PID control cannot control the temperature of liquid in a pipeline with higher precision, and the dialysate temperature PID control algorithm has two major defects:
firstly, the liquid has great hysteresis, the heat conduction of the liquid is slower, and if a conventional PID control system is used, the control is brought with great hysteresis;
and secondly, the amplitude of the temperature control is larger up and down, and the temperature control is slow to converge due to the hysteresis of the control.
Disclosure of Invention
The present invention is directed to a dialysate temperature control system for solving the above problems.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a dialysate temperature control system comprising a dialyzer and tubing connected to the dialyzer, the tubing also being connected to a dialysate bag such that a portion of blood flowing through the dialyzer passes through the dialysate bag, comprising:
the dialysate bag is arranged in the heat preservation cavity, and a first heating component is arranged at the bottom of the heat preservation cavity so as to control the temperature of the heat preservation cavity; a first temperature measuring component is arranged on the heat preservation cavity to measure the temperature of the dialysate bag;
the first temperature measuring assembly and the second temperature measuring assembly for measuring the liquid in the pipeline are electrically connected with the temperature control unit, and the temperature control unit controls the working power of the first heating assembly according to the measured temperature data so as to enable the temperature of the dialysate to be at a constant value.
Further, the temperature control unit comprises an integral controller and a proportional-differential controller, the integral controller adjusts the working power of the first heating component according to the temperature of the liquid in the pipeline, and the proportional-differential controller adjusts the working power of the first heating component according to the temperature of the dialysate bag.
Further, the second temperature measuring assembly is used for measuring the liquid in the pipeline in a non-contact mode.
Further, the second temperature measuring component is an infrared temperature sensor.
Further, the step of calibrating the infrared temperature sensor includes:
s1, constructing a temperature measuring environment, and enabling liquid in a dialysate bag to flow through a pipeline;
s2, calibrating at least one temperature value of the infrared temperature sensor;
s3, detecting the temperature value of the liquid flowing through the pipeline by an infrared temperature sensor;
s4, collecting the water temperature of the actual liquid in the pipeline by using a data recorder;
s5, comparing the temperature value measured by the infrared temperature sensor with the real water temperature obtained by the data recorder, so as to obtain an error value of the infrared temperature sensor, and adjusting the calibration coefficient of the infrared temperature sensor according to the error value.
Further, a temperature kettle is arranged on the pipeline, and the second temperature measuring assembly is arranged on the outer surface of the temperature kettle so as to measure the temperature of liquid flowing through the temperature kettle.
Further, the temperature kettle is made of polyvinyl chloride material.
In another aspect, the present invention provides a method for controlling the temperature of a dialysate, including the steps of:
collecting the temperature of the dialysate bag by using a first temperature measuring assembly, and collecting the liquid temperature in the pipeline by using a second temperature measuring assembly;
the temperature control unit controls the working power of the first heating component according to the measured temperature data so as to enable the temperature of the dialysate to be at a constant value;
further, the temperature control unit comprises an integral controller and a proportional differential controller, the integral controller adjusts the working power of the first heating component according to the temperature of the liquid in the pipeline, and the proportional differential controller adjusts the working power of the first heating component according to the temperature of the dialysate bag.
Compared with the prior art, the invention at least comprises the following beneficial effects:
(1) The temperature control is performed by adopting a dual-sensor temperature acquisition mode, one side is used for measuring the temperature of liquid in a pipeline in real time, the other side is used for measuring the temperature of a heat preservation cavity in real time, the accuracy of the temperature control is improved by adopting a dual-state quantity input single control quantity output mode, the influence caused by hysteresis is reduced, and the purpose of accurately controlling the temperature of dialysate is achieved;
(2) In order to meet the high-precision requirement of non-contact temperature measurement on liquid in a pipeline, the embodiment replaces the original sensor blackbody calibration with the integral calibration under the simulated real temperature measuring environment, so that the error of the blackbody and the liquid thermal emissivity can be eliminated, and the error of the whole pipeline structure on temperature measurement can also be eliminated.
Drawings
Fig. 1 is a schematic diagram of a dialysate temperature control system according to the present embodiment;
FIG. 2 is a flowchart of the PID control algorithm provided by the present embodiment;
FIG. 3 is a schematic diagram of the calibration structure of the infrared temperature sensor according to the present embodiment;
fig. 4 is a flowchart of a dialysate temperature control method provided in this embodiment.
Detailed Description
It should be noted that the description as it relates to "first", "second", "a", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, the present embodiment provides a dialysate temperature control system, which includes a dialyzer and a line connected to the dialyzer, the line also being connected to a dialysate bag such that a portion of blood flowing through the dialyzer passes through the dialysate bag. The dialysate bag sets up in the heat preservation chamber, and heat preservation chamber bottom is provided with first heating element to carry out temperature control to the heat preservation chamber. A first temperature measuring component is arranged on the heat preservation cavity to measure the temperature of the dialysate bag;
the first temperature measuring component and the second temperature measuring component for measuring the liquid in the pipeline are electrically connected with the temperature control unit, and the temperature control unit controls the working power of the first heating component according to the measured temperature data so as to enable the temperature of the dialysate to be at a constant value.
The first temperature measurement component may be a thermistor temperature sensor.
The first heating assembly includes a heating film and a heating tray (not shown) for placing the dialysate bag, the heating film being disposed inside the heating tray to provide a heat source for the dialysate.
As shown in fig. 2, the temperature control unit includes an integral controller and a proportional-differential controller, the integral controller adjusts the working power of the first heating component according to the temperature of the liquid in the pipeline, and the proportional-differential controller adjusts the working power of the first heating component according to the temperature of the dialysate bag.
In the figure, G 1 For the transfer function of the heating system of the heat preservation cavity, G 2 A transfer function for the dialysate bag to line fluid heat transfer system; q (Q) 1 Is the control gain weight of the integral controller, Q 2 Is the control gain weight of the proportional-derivative controller.
The control system adjusts output power by the two parts, wherein the first target is a main control system, and the used controller is an integral controller; the second object is a secondary control system, and the controller used is a proportional differential controller, so that the control gain of the primary control system is larger than the gain of the secondary control system. The temperature of the pipeline is controlled within +/-0.5 ℃ of the set heat preservation temperature. The temperature of the pipeline end is subjected to closed loop feedback control, the integral controller adjusts the heating film power according to the deviation by comparing the deviation between the liquid temperature of the pipeline and the expected temperature, and the deviation is eliminated to keep the liquid temperature at a constant value.
And secondly, the temperature of the heat preservation cavity needs to be controlled to be a stable value, so that the temperature of the heat preservation cavity is kept at a relatively constant power output, and the hysteresis of the heat preservation cavity is reduced. The temperature of the liquid at the pipeline end is kept by means of heat transfer of the liquid in the liquid bag, so that when the pipeline temperature reaches the expected temperature, the proportional differential controller can adjust the power of the heating film to enable the temperature of the heat preservation cavity to be stable within a certain range, so that the stable power output is kept, and the effect of converging the temperature of the liquid at the pipeline end is achieved.
For measuring the temperature of the dialysate, the thermistor temperature sensor adopted in the traditional mode has the advantages that the indication value of the instrument is behind the change of the measured temperature due to the thermal inertia of the thermal resistor, when the temperature of the ambient temperature rises faster, the sensor certainly has heat transfer and thermocouple reaction for a longer time, so that the temperature measurement is more delayed. In the embodiment, the temperature of the liquid at the pipeline end is controlled to reach the expected temperature, the temperature of the heat preservation cavity is controlled to be stable, the output power of the heat preservation cavity is stable, the liquid at the pipeline end is enabled to be stable, and meanwhile, the weight of the control gain at two sides is adjustable. Therefore, the accuracy of temperature control is improved by a mode of inputting double state quantities and outputting single control quantity, the influence caused by hysteresis is reduced, and the purpose of accurately controlling the temperature of the dialysate is achieved.
For devices like hemodialysis machines, the temperature of the dialysate within the inlet line of the dialyzer needs to be measured and controlled accurately. The conventional common contact temperature measurement sensor such as a PT100 temperature sensor cannot perform temperature test on liquid in a pipeline, and two major defects exist in a method for approximately testing the temperature of dialysate by directly contacting the sensor with the pipeline: (1) The safety problem exists, the sensor is directly contacted with the pipeline, and the hidden danger of electric shock is easily caused under the condition of being touched by a patient by mistake; (2) Such contact is extremely slow in heat conduction and cannot accurately measure the actual temperature in real time, and there is a great delay in the rapid change of the temperature in the pipeline.
The second temperature measuring assembly used in the embodiment measures the liquid in the pipeline in a non-contact mode, and specifically an infrared temperature sensor is used. The pipeline is provided with a temperature kettle made of polyvinyl chloride (PVC) material, and the infrared temperature sensor is arranged on the outer surface of the temperature kettle to measure the temperature of liquid flowing through the temperature kettle. The infrared temperature sensor does not need heat transfer medium transfer, has good heat efficiency, is sensitive, has quick response time and does not need any contact with detected objects.
Furthermore, because the calibrated object and the actual temperature measurement object are different (namely, the emissivity of the blackbody and the emissivity of the liquid are different) and the calibrated distance and angle are different from the actual temperature measurement distance and angle, the traditional calibrated blackbody calibration method is changed, and the actual temperature measurement environment calibration is simulated in the actual kettle structure with temperature.
For calibrating the infrared temperature sensor, the calibration device built by the implementation is shown in fig. 3, and mainly comprises a data analyzer, a temperature kettle, a liquid bag, a pump and a computer control terminal. The temperature kettle is of a three-way structure, one end of the temperature kettle is used for introducing liquid with certain temperature, the other two ports form circulation with the liquid bag through the pump, and the pump body drives the liquid to circulate between the temperature kettle and the liquid bag so as to simulate the environment of the dialyzate in the pipeline. The data analyzer is used for collecting the actual temperature of liquid flowing to the temperature kettle, the infrared temperature sensor is closely attached to the outer surface of the temperature kettle, when the dialysate in the pipeline flows through the inside of the temperature kettle, the infrared temperature sensor is used for calibrating at least one temperature value of the liquid, the temperature value measured by the infrared temperature sensor is printed out through the serial port by the computer control terminal, the temperature value is compared with the actual temperature obtained by the data analyzer, the obtained dialysate temperature is compared with the actual dialysate temperature error value, and therefore the calibration coefficient of the infrared temperature sensor is adjusted, the accurate measurement of the liquid temperature in the pipeline is realized, and the measurement error is +/-0.2 ℃.
In order to meet the high-precision requirement of non-contact temperature measurement on liquid in a pipeline, the embodiment replaces the original sensor blackbody calibration with the integral calibration under the simulated real temperature measuring environment, so that the error of the blackbody and the liquid thermal emissivity can be eliminated, and the error of the whole pipeline structure on temperature measurement can also be eliminated.
The embodiment also provides a dialysate temperature control method, which comprises the following steps:
t1, collecting the temperature of a dialysate bag by a first temperature measuring assembly, and collecting the liquid temperature in a pipeline by a second temperature measuring assembly;
and T2, controlling the working power of the first heating component by the temperature control unit according to the measured temperature data so as to enable the temperature of the dialysate to be at a constant value.
The temperature control unit comprises an integral controller and a proportional-differential controller, the integral controller adjusts the working power of the first heating component according to the temperature of the liquid in the pipeline, and the proportional-differential controller adjusts the working power of the first heating component according to the temperature of the dialysate bag.
The embodiment designs a dual-input single-output PID-based dialysate control algorithm, one side is used for measuring the temperature of the pipeline liquid in real time, the other side is used for measuring the temperature of the heat preservation cavity in real time, the accuracy of temperature control is improved by a mode of inputting the single control quantity through the dual-state quantity, influence caused by hysteresis is reduced, the convergence rate of temperature regulation is effectively improved, and the temperature of the pipeline end liquid changes in a small range.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (9)
1. A dialysate temperature control system comprising a dialyzer and a line connected to the dialyzer, the line further connected to a dialysate bag such that a portion of blood flowing through the dialyzer passes through the dialysate bag, comprising:
the dialysate bag is arranged in the heat preservation cavity, and a first heating component is arranged at the bottom of the heat preservation cavity so as to control the temperature of the heat preservation cavity; a first temperature measuring component is arranged on the heat preservation cavity to measure the temperature of the dialysate bag;
the first temperature measuring assembly and the second temperature measuring assembly for measuring the liquid in the pipeline are electrically connected with the temperature control unit, and the temperature control unit controls the working power of the first heating assembly according to the measured temperature data so as to enable the temperature of the dialysate to be at a constant value.
2. The dialysate temperature control system of claim 1, wherein the temperature control unit comprises an integral controller and a proportional-derivative controller, the integral controller regulating the operating power of the first heating element in response to the temperature of the fluid in the line, the proportional-derivative controller regulating the operating power of the first heating element in response to the temperature of the dialysate bag.
3. The dialysate temperature control system of claim 1, wherein the second temperature measurement assembly measures the fluid in the line in a non-contact manner.
4. The dialysate temperature control system of claim 3, wherein the second temperature measurement component is an infrared temperature sensor.
5. The dialysate temperature control system of claim 4, wherein calibrating the infrared temperature sensor comprises:
s1, constructing a temperature measuring environment, and enabling liquid in a dialysate bag to flow through a pipeline;
s2, calibrating at least one temperature value of the infrared temperature sensor;
s3, detecting the temperature value of the liquid flowing through the pipeline by an infrared temperature sensor;
s4, collecting the water temperature of the actual liquid in the pipeline by using a data recorder;
s5, comparing the temperature value measured by the infrared temperature sensor with the real water temperature obtained by the data recorder, so as to obtain an error value of the infrared temperature sensor, and adjusting the calibration coefficient of the infrared temperature sensor according to the error value.
6. A dialysate temperature control system according to claim 3 in which a temperature kettle is provided on the line, the second temperature measurement assembly being mounted to an external surface of the temperature kettle to measure the temperature of the fluid flowing through the temperature kettle.
7. The dialysate temperature control system of claim 6, wherein the temperature kettle is a polyvinyl chloride material.
8. A dialysate temperature control method based on the dialysate temperature control system of any one of claims 1 to 7, comprising the steps of:
collecting the temperature of the dialysate bag by using a first temperature measuring assembly, and collecting the liquid temperature in the pipeline by using a second temperature measuring assembly;
the temperature control unit controls the working power of the first heating component according to the measured temperature data so as to enable the temperature of the dialysate to be at a constant value.
9. The method according to claim 8, wherein the temperature control unit includes an integral controller and a proportional-differential controller, the integral controller adjusts the operating power of the first heating element according to the temperature of the liquid in the pipeline, and the proportional-differential controller adjusts the operating power of the first heating element according to the temperature of the dialysate bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310886421.8A CN116832245A (en) | 2023-07-19 | 2023-07-19 | Dialysate temperature control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310886421.8A CN116832245A (en) | 2023-07-19 | 2023-07-19 | Dialysate temperature control system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116832245A true CN116832245A (en) | 2023-10-03 |
Family
ID=88167002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310886421.8A Pending CN116832245A (en) | 2023-07-19 | 2023-07-19 | Dialysate temperature control system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116832245A (en) |
-
2023
- 2023-07-19 CN CN202310886421.8A patent/CN116832245A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200386625A1 (en) | Fluid Property Measurement Devices, Methods, and Systems | |
| US9846085B2 (en) | Fluid property measurement devices, methods, and systems | |
| US20200060869A1 (en) | Core body temperature measurement | |
| TWI437402B (en) | Pressure flow control device | |
| JP3373850B2 (en) | Temperature control device and straightening method | |
| JP2704048B2 (en) | Current difference type thermal mass flow transducer | |
| US8302471B2 (en) | Calorimetric flow meter having high heat conductivity strips | |
| US5588959A (en) | Hemodialysis recirculation measuring method | |
| KR101253543B1 (en) | Method of compensating for attitude sensitivity of thermal sensor coils and thermal mass flow measurement system | |
| US7981046B2 (en) | Temperature measurement device | |
| US20080071189A1 (en) | Temperature Measurement Device | |
| US11733108B2 (en) | Method for calibrating short temperature measuring device using dry body temperature calibrator | |
| EP0715859A1 (en) | Method and device for measuring the ultrafiltration volume in a dialysis machine and method for calibrating the device | |
| US20190049278A1 (en) | Thermal type flowmeter | |
| KR100791431B1 (en) | Fluid-measuring device and fluid-measuring method | |
| WO2008087037A1 (en) | Thermostat apparatus including calibration device | |
| CN104677522A (en) | Scene automatic calibration system and method for integrative temperature transmitter | |
| CN205809732U (en) | A kind of attemperating unit of protein analyzer | |
| US6132083A (en) | Real-time measuring method | |
| CN116832245A (en) | Dialysate temperature control system and method | |
| JP6748781B2 (en) | System and method for estimating the temperature of a liquid sample | |
| EP3348969B1 (en) | Measurement of a fluid parameter and sensor device therefore | |
| CN110736683A (en) | Temperature control device and method for liquid phase diffusion coefficient measuring instruments | |
| Hjertaker et al. | A thermometry system for quality assurance and documentation of whole body hyperthermia procedures | |
| CN117607496A (en) | Flow rate calibration method for warming infusion system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |