Replacement liquid temperature regulation and control method of blood purification equipment and blood purification equipment

Abstract

The embodiment of the invention provides a replacement liquid temperature regulation and control method of blood purification equipment and the blood purification equipment, and solves the technical problem that in the prior art, the temperature of replacement liquid is changed, so that the temperature of the replacement liquid is too high, and negative effects are generated on a blood purification object. According to the replacement liquid temperature regulation and control method of the blood purification equipment, the real-time temperature of the replacement liquid in the liquid pipeline is monitored in real time, and when the real-time temperature of the replacement liquid exceeds the preset temperature range, the working state of the pump is regulated and controlled according to the real-time temperature and the preset temperature range; the temperature of the displacement liquid in the liquid pipeline is reduced, so that the temperature of the displacement liquid in the liquid pipeline is within the preset temperature range, negative effects caused by too high liquid temperature are avoided, and the safety of the blood purification equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a method for controlling the temperature of a replacement fluid of a blood purification device and a blood purification device. Background Art

[0002] When using blood purification equipment for blood purification, replacement fluid is usually required. The temperature of the replacement fluid is closely related to the normal temperature of the human body. Therefore, a heating device is provided in the blood purification equipment to heat the replacement fluid so that the temperature of the replacement fluid infused into the human body can be maintained at around 37°C. However, in actual applications, the temperature of the replacement fluid will change, which will make the temperature of the replacement fluid too high, which will have a negative impact on the human body, and the consequences are unimaginable. Summary of the invention

[0003] In order to solve the above technical problems, the present invention is proposed. The embodiments of the present invention provide a method for controlling the temperature of a replacement fluid of a blood purification device and a blood purification device, which solves the technical problem in the prior art that the temperature of the replacement fluid changes, thereby causing the temperature of the replacement fluid to be too high, which has a negative impact on the blood purification object.

[0004] As a first aspect of the present invention, the present invention provides a method for controlling the temperature of a replacement fluid of a blood purification device, the blood purification device comprising: a liquid pipeline, a pump and a heating device, the pump is used to provide power for the replacement fluid to flow in the heating device and the liquid pipeline, the heating device is used to heat the replacement fluid flowing through, and the liquid pipeline is used to transport the replacement fluid heated by the heating device;

[0005] Wherein, the replacement fluid temperature control method comprises:

[0006] Obtaining the current temperature of the replacement fluid in the liquid pipeline at the current moment;

[0007] When the current temperature of the replacement fluid in the liquid pipeline exceeds the preset temperature range, the working state of the pump is regulated according to the current temperature and the preset temperature range so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range.

[0008] In one embodiment of the present invention, regulating the working state of the pump according to the current temperature and the preset temperature range includes:

[0009] When the current temperature is greater than the maximum preset temperature in the preset temperature range, controlling the pump to stop working;

[0010] Real-time acquisition of the real-time temperature of the replacement fluid in the liquid pipeline after the pump stops working;

[0011] When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature, controlling the pump to start working;

[0012] Wherein, the first preset temperature is greater than the minimum preset temperature in the preset temperature range.

[0013] In one embodiment of the present invention, when the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature, controlling the pump to start working includes:

[0014] When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature for the first time, the pump is controlled to start working and pump the replacement fluid into the heating device at a first preset flow rate.

[0015] In one embodiment of the present invention, when the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature, controlling the pump to start working includes:

[0016] When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature for the first time and then continues to decrease, and the duration is longer than the first preset time, the pump is controlled to start working and pump the replacement fluid into the heating device at a first preset flow rate.

[0017] In one embodiment of the present invention, the working state of the pump is regulated according to the current temperature and the preset temperature range, and the temperature regulation method further includes:

[0018] When the real-time temperature of the replacement fluid in the liquid pipeline is lower than a second preset temperature, the pump is controlled to start working and pump the replacement fluid into the heating device at a second preset flow rate, wherein the second preset temperature is higher than the first preset temperature and the second preset flow rate is lower than the first preset flow rate.

[0019] In one embodiment of the present invention, the blood purification device further comprises: a cooling pump and a cooling pipeline, wherein the cooling pump is used to pump cooling replacement fluid into the cooling pipeline, and the cooling pipeline is used to transport the cooling replacement fluid to the liquid pipeline and / or the heating device, wherein the temperature of the cooling replacement fluid is lower than the current temperature of the replacement fluid in the liquid pipeline;

[0020] Wherein, the temperature control method further comprises:

[0021] When the current temperature of the replacement fluid in the liquid pipeline is greater than the maximum preset temperature in the preset temperature range, the cooling pump is controlled to start so that the cooling pump pumps the cooling replacement fluid into the cooling pipeline, and the cooling replacement fluid flows through the cooling pipeline to the liquid pipeline and / or the heating device.

[0022] In one embodiment of the present invention, the blood purification device further comprises: a drainage valve and a drainage pipeline, wherein the drainage valve is used to guide part of the replacement fluid heated by the heating device into the drainage pipeline;

[0023] Wherein, the temperature control method further comprises:

[0024] When the current temperature of the replacement fluid in the liquid pipeline is greater than the maximum preset temperature in the preset temperature range, the drainage valve is controlled to open to output part of the replacement fluid heated in the heating device to the drainage pipeline.

[0025] In one embodiment of the present invention, the temperature control method further includes:

[0026] When the current temperature of the replacement fluid in the liquid pipeline is within the preset temperature range, and when the current temperature is greater than a third preset temperature, obtaining the real-time temperature of the replacement fluid after the current moment, the third preset temperature is less than the maximum preset temperature within the preset temperature range, and the third preset temperature is greater than the average temperature within the preset temperature range;

[0027] Acquire the current flow rate at which the pump pumps the replacement fluid into the heating device at the current moment;

[0028] When the real-time temperature of the replacement fluid after the current moment continues to rise and the duration is greater than the second preset duration, the pump is controlled to pump the replacement fluid into the heating device at a third preset flow rate; wherein the third preset flow rate is less than the current flow rate.

[0029] As a second aspect of the present application, the present application provides a blood purification device, comprising:

[0030] A heating device, used to heat the replacement fluid flowing through;

[0031] A liquid pipeline, used for transporting the replacement fluid heated by the heating device;

[0032] A pump, used to provide power for the replacement fluid to flow in the heating device and the liquid pipeline;

[0033] a temperature sensor, the temperature sensor being used to detect the temperature of the replacement fluid in the liquid pipeline; and

[0034] A controller is used to execute the temperature control method described above.

[0035] In one embodiment of the present invention, the blood purification device further comprises:

[0036] a cooling pump and a cooling pipeline, wherein the cooling pump is used to pump cooling replacement fluid into the cooling pipeline, and the cooling pipeline is used to transport the cooling replacement fluid to the liquid pipeline and / or the heating device; and / or

[0037] A drainage valve and a drainage pipeline, wherein the drainage valve is used to drain part of the replacement fluid heated by the heating device into the drainage pipeline;

[0038] The controller is used to execute the temperature control method described above.

[0039] The method for controlling the temperature of the replacement fluid of a blood purification device provided by the present invention monitors the real-time temperature of the replacement fluid in the liquid pipeline in real time. When the real-time temperature of the replacement fluid exceeds a preset temperature range, the working state of the pump is controlled according to the real-time temperature and the preset temperature range to reduce or increase the temperature of the replacement fluid after being heated by a heating device, so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range, thereby avoiding the negative impact caused by excessively high temperature of the replacement fluid, thereby improving the safety of the blood purification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and other purposes, features and advantages of the present invention will become more apparent by describing the embodiments of the present invention in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0041] Figure 1 Shown is a schematic structural diagram of a blood purification device provided by an exemplary embodiment of the present invention.

[0042] Figure 2 Shown is a schematic structural diagram of a blood purification device provided by another exemplary embodiment of the present invention.

[0043] Figure 3 Shown is a schematic structural diagram of a blood purification device provided by another exemplary embodiment of the present invention.

[0044] Figure 4 Shown is a schematic flow chart of a method for controlling temperature of a replacement fluid of a blood purification device provided by an exemplary embodiment of the present invention.

[0045] Figure 5 Shown is a schematic flow chart of a method for controlling the temperature of a replacement fluid of a blood purification device provided by another exemplary embodiment of the present invention.

[0046] Figure 6Shown is a schematic flow chart of a method for controlling the temperature of a replacement fluid of a blood purification device provided by another exemplary embodiment of the present invention.

[0047] Figure 7 Shown is a schematic flow chart of a method for controlling the temperature of a replacement fluid of a blood purification device provided by another exemplary embodiment of the present invention.

[0048] Figure 8 Shown is a schematic flow chart of a method for controlling the temperature of a replacement fluid of a blood purification device provided by another exemplary embodiment of the present invention.

[0049] Fig. 9 Shown is a structural block diagram of a replacement fluid temperature controller of a blood purification device provided by an exemplary embodiment of the present invention.

[0050] Fig.10 is a structural block diagram of an electronic device provided by an exemplary embodiment of the present invention.

[0051] Reference numerals:

[0052] 1-heating device, 3-pump, 4-liquid pipeline, 5-drainage valve, 6-drainage pipeline, 8-cooling pump, 9-cooling pipeline. DETAILED DESCRIPTION

[0053] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

[0054] Exemplary Blood Purification Devices

[0055] Figure 1 FIG. 1 is a schematic diagram of the structure of a blood purification device provided by an exemplary embodiment of the present invention. Figure 1As shown, the blood purification device includes: a liquid pipeline 4, a pump 3, a heating device 1, and a temperature sensor. The pump 3 can provide power for the replacement fluid to flow in the heating device 1 and the liquid pipeline 4. For example, before starting the blood purification device, one end of the pump 3 is connected to the first liquid storage bag (storing the replacement fluid), the blood purification device is started, and after the pump 3 is turned on, the pump 3 can pump the replacement fluid in the first liquid storage bag into the heating device 1, and the heating device 1 heats the replacement fluid flowing through the heating device 1. The heated replacement fluid is transported to the target position (such as a dialyzer or a human body) by the liquid pipeline 4. Among them, the heating device 1 can heat the replacement fluid so that the temperature of the replacement fluid flowing through the liquid pipeline 4 is maintained within a preset temperature range. Specifically, the flow rate at which the pump 3 pumps the replacement fluid in the first liquid storage bag into the heating device 1 can be controlled by controlling the opening of the pump 3. The temperature sensor is used to detect the temperature of the replacement fluid in the liquid pipeline 4.

[0056] Optionally, as shown in Figure 2, the blood purification device further includes: a drainage valve 5 and a drainage pipeline 6, one port of the drainage valve 5 is connected to the heating device 1, and the other port of the drainage valve 5 is connected to a port of the drainage pipeline 6, and the other port of the drainage pipeline 6 can be connected to the second liquid storage bag. By opening the drainage valve 5, the replacement fluid heated in the heating device 1 can be output to the drainage pipeline 6, and the drainage pipeline 6 transports part of the heated replacement fluid to the second liquid storage bag for storage. When the temperature of the replacement fluid in the liquid pipeline 4 is too high, the drainage valve 5 can be opened to lead part of the high-temperature replacement fluid heated by the heating device to the second liquid storage bag to reduce the temperature of the replacement fluid after passing through the heating device, so that the temperature of the replacement fluid in the liquid pipeline 4 is within a preset temperature range.

[0057] Optional, such as Figure 3 As shown, the blood purification device also includes: a cooling pump 8 and a cooling pipeline 9, the other end of the cooling pump 8 is connected to a port of the cooling pipeline 9, and the other end of the cooling pipeline 9 is connected to the heating device 1. A third liquid storage bag is prepared in advance, and the third liquid storage bag stores a cooling replacement fluid (the temperature of the cooling replacement fluid can be lower than the temperature of the replacement fluid stored in the first liquid storage bag). When the temperature of the replacement fluid in the liquid pipeline 4 is too high, first connect one port of the cooling pump 8 to the third liquid storage bag, and then turn on the cooling pump 8, so that the cooling pump 8 pumps the cooling replacement fluid in the third liquid storage bag into the cooling pipeline 9, and the cooling pipeline 9 transports the cooling replacement fluid to the heating device 1, and the cooling replacement fluid is neutralized with the heated replacement fluid in the heating device 1 to reduce the temperature of the replacement fluid in the liquid pipeline 4, so that the temperature of the replacement fluid in the liquid pipeline 4 is within a preset temperature range.

[0058] As another embodiment, the other end of the cooling line 9 is connected to the liquid line 4. When the temperature of the replacement fluid in the liquid line 4 is too high, the cooling pump 8 is turned on so that the cooling pump 8 pumps the cooling replacement fluid in the third liquid storage bag 10 into the cooling line 9, and the cooling line 9 transports the cooling replacement fluid to the liquid line 4. After the cooling replacement fluid is neutralized with the high-temperature replacement fluid in the liquid line 4, the temperature of the replacement fluid in the liquid line 4 is reduced, so that the temperature of the replacement fluid in the liquid line 4 is within a preset temperature range when it is transported to the target location (such as a dialyzer or a human body).

[0059] Exemplary Regulation Methods

[0060] Figure 4 FIG. 1 is a flow chart of a method for controlling the temperature of a replacement fluid in a blood purification device according to an exemplary embodiment of the present invention, which is used to control the temperature of the replacement fluid in the blood purification device according to the exemplary embodiment of the present invention. Figure 1 The temperature of the replacement fluid in the liquid pipeline of the blood purification device shown, such as Figure 4 As shown, the replacement fluid temperature control method of the blood purification device includes the following steps:

[0061] S1: Obtain the current temperature of the replacement fluid in the liquid pipeline at the current moment;

[0062] Specifically, a temperature sensor may be used to detect the current temperature of the replacement fluid in the liquid pipeline in real time.

[0063] S2: Determine whether the current temperature of the replacement fluid is within the preset temperature range;

[0064] Specifically, the preset temperature range is T min ~T max , where T min is the minimum preset temperature within the preset temperature range, T max It is the maximum preset temperature within the preset temperature range. max and T minIt can be determined according to the pipeline distance L1 between the heating device and the temperature sensor, the pipeline distance L2 between the temperature sensor and the target position, and the pipeline distance L3 between the heating device and the target position (L3=L1+L2). The target position is a human body or a dialyzer. The pipeline distance refers to the distance of the displacement fluid flowing in the liquid pipeline. For example, the pipeline distance between the heating device and the human body (target position) refers to the distance that the displacement fluid flows from the heating device to the human body. Since the allowable temperature of the displacement fluid at the target position is about 37°C, for example, 36°C to 37.2°C, the maximum temperature and minimum temperature of the displacement fluid after being heated by the heating device (i.e., at the outlet position of the heating device) can be calculated according to the allowable temperature of the displacement fluid at the target position (for example, 36°C to 37.2°C), the pipeline distance between the heating device and the target position, the physical properties of the displacement fluid (for example, thermal conductivity), the conditions of the liquid pipeline (for example, pipeline diameter), and the flow rate of the displacement fluid. The maximum preset temperature T of the replacement fluid at the temperature sensor position is calculated based on the maximum temperature and minimum temperature after heating by the heating device (i.e., at the outlet of the heating device), the physical properties of the replacement fluid (such as thermal conductivity), the conditions of the liquid pipeline (such as pipeline diameter), and the flow rate of the replacement fluid. max And the minimum preset temperature T min .

[0065] When the judgment result in S2 is no, that is, the current temperature of the replacement fluid is not within the preset temperature range, if no treatment is done at this time, then when the replacement fluid flows to the target position, the temperature of the replacement fluid has exceeded the allowable temperature, which will have a serious negative impact on the human body, and the consequences are unimaginable. Therefore, it is necessary to control the working state of the pump according to the current temperature and the preset temperature range so that the temperature of the replacement fluid in the liquid pipeline can be within the preset temperature range, that is, execute S3 to avoid negative impacts.

[0066] S3: regulating the working state of the pump according to the current temperature and the preset temperature range, so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range.

[0067] The working state of the pump is regulated according to the current temperature and the preset temperature range, for example, the pump is regulated to stop working or the opening of the pump is regulated so that the pump speed pumped into the heating device is reduced or increased, so as to reduce or increase the temperature of the replacement fluid in the liquid pipeline, so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range.

[0068] The method for controlling the temperature of the replacement fluid of a blood purification device provided by the present invention monitors the real-time temperature of the replacement fluid in the liquid pipeline in real time. When the real-time temperature of the replacement fluid exceeds a preset temperature range, the working state of the pump is controlled according to the real-time temperature and the preset temperature range to reduce or increase the temperature of the replacement fluid after being heated by a heating device, so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range, thereby avoiding the negative impact caused by excessively high liquid temperature, thereby improving the safety of the blood purification device.

[0069] In one embodiment of the present invention, Figure 5 As shown, when the current temperature of the replacement fluid exceeds the preset temperature range, the control method of the working state of the pump can adopt the following control method, that is, S3 (controlling the working state of the pump according to the current temperature and the preset temperature range) can specifically include the following steps:

[0070] S31: When the current temperature of the replacement fluid is greater than the maximum preset temperature T in the preset temperature range max The control pump stops working.

[0071] When the current temperature of the replacement fluid in the liquid pipeline is greater than the maximum preset temperature T in the preset temperature range max When the pump is controlled to stop working, the blood purification device is stopped. No replacement fluid flows through the heating device, and the replacement fluid in the liquid pipeline does not flow through the heated replacement fluid, so that the temperature of the existing replacement fluid in the liquid pipeline can be gradually reduced.

[0072] When the pump stops working, the temperature sensor still detects the real-time temperature of the replacement fluid in the liquid pipeline in real time, and starts the pump in time according to the real-time temperature so that the blood purification device continues to work, that is, executes S32-S34.

[0073] S32: acquiring in real time the real-time temperature of the replacement fluid in the liquid pipeline after the pump stops working;

[0074] When the pump stops working, the real-time temperature of the replacement fluid in the liquid pipeline can be detected in real time by the temperature sensor.

[0075] S33: determining whether the real-time temperature of the replacement fluid in the liquid pipeline is less than a first preset temperature;

[0076] Specifically, the first preset temperature T1 is greater than the minimum preset temperature T in the preset temperature range. min , that is, T1>T min .

[0077] When the judgment result in S33 is yes, that is, the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature T1, the operation of the pump is controlled, that is, S34 is executed.

[0078] When the judgment result in S33 is no, that is, the real-time temperature of the replacement fluid in the liquid pipeline is greater than or equal to the first preset temperature T1, the pump continues to stop working.

[0079] S34: Control the pump to start working;

[0080] When the real-time temperature of the replacement fluid is lower than the first preset temperature T1, the control pump starts working to increase the temperature of the replacement fluid in the liquid pipeline.

[0081] Optionally, the first preset temperature T1 may be an average value of a minimum preset temperature and a maximum preset temperature in a preset temperature range, so that when the pump is restarted, the temperature of the replacement fluid in the liquid pipeline will not quickly exceed the preset temperature range, thereby preventing the pump from frequently stopping.

[0082] Optionally, the first preset temperature T1 can also be determined based on historical data of historical blood purification equipment. For example, according to historical data, it is found that after the pump stops working, when the temperature of the replacement fluid in the liquid pipeline drops to a certain temperature, the pump is started to work, so that the temperature of the replacement fluid can last the longest time within the preset temperature range, that is, the time from the pump starting to work to the next time the liquid temperature exceeds the preset range is longer, so that during the use of the entire blood purification equipment, the number of pump stops and the length of stop time are both lower. Then the first preset temperature is the certain temperature.

[0083] Optionally, the first preset temperature T1 can also be determined according to the pump speed at which the pump pumps the liquid into the heating device when the pump is restarted. For example, when the pump speed is the maximum value in the allowable pump speed range, the first preset temperature T1 can be relatively large, for example, larger than the average value of the minimum preset temperature and the maximum preset temperature in the preset temperature range. When the pump speed is the minimum value in the allowable pump speed range, the first preset temperature T1 can be relatively small, for example, smaller than the average value of the minimum preset temperature and the maximum preset temperature in the preset temperature range.

[0084] Optionally, the first preset temperature T1 may also be equal to the maximum preset temperature T in the preset temperature range. max , that is, when the real-time temperature drops to the maximum preset temperature T in the preset temperature range max , the pump will restart and start working, which can minimize the pump stop time.

[0085] The present invention sets the first preset temperature T1 to be greater than the minimum preset temperature T in the preset temperature range. min , the real-time temperature of the replacement fluid in the fluid management can be reduced to a value lower than the maximum preset temperature T in the preset temperature range. max , and the minimum preset temperature T in the preset temperature rangemin Previously, turning on the pump could not only control the temperature of the replacement fluid within the preset temperature range, but also shorten the pump stop time. When the real-time temperature drops to within the preset temperature range, the pump can be turned on again, so that the blood purification equipment stops working for a shorter time.

[0086] When the pump is restarted, the real-time temperature of the replacement fluid in the liquid pipeline continues to be detected at all times. When the temperature is detected to be not within the preset temperature range, the working state of the pump can be adjusted according to the temperature and the preset temperature range. That is, during the operation of the entire blood purification device, the temperature of the replacement fluid in the liquid pipeline is detected at all times. When the temperature is not within the preset temperature range, the working state of the pump can be adjusted to make the temperature of the replacement fluid within the preset temperature range.

[0087] Optionally, S34 (when the real-time temperature of the replacement fluid in the liquid pipeline is less than the first preset temperature, controlling the pump to start working) may specifically include the following steps:

[0088] S341: When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature for the first time, the pump is controlled to start working and pump the replacement fluid into the heating device at a first preset flow rate;

[0089] When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature for the first time, the pump is controlled to start working and pump the replacement fluid in the first liquid storage bag into the heating device at a first preset flow rate.

[0090] Specifically, the first preset flow rate may be S31 (when the current temperature of the replacement fluid is greater than the maximum preset temperature T in the preset temperature range). max The pump speed before the control pump stops working is set to the pump speed before the control pump stops working.

[0091] Optionally, S34 (when the real-time temperature of the replacement fluid in the liquid pipeline is less than the first preset temperature, controlling the pump to start working) may specifically include the following steps:

[0092] S342: When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature for the first time and then continues to decrease, and the duration of the decrease is longer than the first preset duration, the control pump is turned on and the replacement fluid is pumped into the heating device at a first preset flow rate.

[0093] Specifically, the first preset time length may be 5 to 10 times the sampling period of the temperature sensor for collecting temperature data. In other words, if 5 to 10 temperature data collected continuously by the temperature sensor gradually decrease, it can be determined that the liquid temperature continues to decrease.

[0094] That is, when the temperature of the replacement fluid is reduced to the first preset temperature for the first time, it may be a sudden change in the temperature of the replacement fluid caused by an emergency or other fault. Therefore, it is necessary to determine whether the temperature continues to decrease after it is reduced to the first preset temperature for the first time. If it continues to decrease and the duration is greater than the first preset time, it means that the temperature of the replacement fluid in the liquid pipeline is continuously decreasing. Therefore, the control pump is started and the replacement fluid is pumped into the heating device at a first preset flow rate for heating to start the blood purification equipment.

[0095] Optionally, S3 (regulating the working state of the pump according to the current temperature and the preset temperature range) further includes the following steps:

[0096] S343: When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the second preset temperature, the control pump is turned on and the replacement fluid is pumped into the heating device at a second preset flow rate, wherein the second preset temperature is higher than the first preset temperature, and the second preset flow rate is lower than the first preset flow rate.

[0097] When the pump stops working, the real-time temperature of the replacement fluid in the liquid pipeline decreases. When the real-time temperature of the replacement fluid decreases to a second preset temperature (greater than the first preset temperature), the pump can be controlled to pump the replacement fluid into the heating device at a second preset flow rate (less than the first preset flow rate). That is, when the temperature decreases, before it decreases to the first preset temperature, the pump can be controlled to pump the replacement fluid into the liquid pipeline at a lower flow rate, so that the pump can be stopped for a shorter time.

[0098] If the temperature of the replacement fluid drops to the second preset temperature and the pump is not started as described above, the real-time temperature of the replacement fluid will continue to drop. Then, when the real-time temperature of the replacement fluid drops to the first preset temperature, the pump can be started so that the pump pumps the replacement fluid into the heating device at a first preset flow rate (greater than the second preset flow rate).

[0099] It should be noted that both the first preset flow rate and the second preset flow rate are within the allowable flow rate range.

[0100] In another embodiment of the present invention, Figure 2 As shown, the blood purification device also includes a drainage valve 5 and a drainage pipeline 6. By opening the drainage valve 5, the heated replacement fluid in the heating device 1 can be output to the drainage pipeline 6, and the drainage pipeline 6 transports part of the heated replacement fluid to the drainage pipeline, and the drainage pipeline transports part of the replacement fluid to the second liquid storage bag for storage. When the temperature of the replacement fluid in the liquid pipeline is too high, in addition to the above-mentioned working state of the regulating pump, other methods can also be used to make the temperature of the replacement fluid in the liquid pipeline within a preset temperature range, such as Figure 6 As shown, the replacement fluid temperature control method provided by the present invention also includes the following steps:

[0101] S4: When the current temperature of the replacement fluid in the liquid pipeline is greater than the maximum preset temperature T in the preset temperature range max When the drainage valve is controlled to open, part of the replacement fluid heated in the heating device is output to the drainage pipeline, and the pump is controlled to pump part of the replacement fluid into the heating device.

[0102] When the temperature of the replacement fluid in the liquid pipeline 4 is too high, the drainage valve 5 can be opened to lead part of the high-temperature replacement fluid heated by the heating device to the drainage pipeline 6, and the drainage pipeline 6 transports the part of the high-temperature replacement fluid to the second liquid storage bag. At the same time, the replacement fluid in the first liquid storage bag can be pumped into the heating device 1 to neutralize the remaining high-temperature replacement fluid in the heating device, thereby reducing the temperature of the replacement fluid after passing through the heating device, so that the temperature of the replacement fluid in the liquid pipeline 4 is within the preset temperature range.

[0103] In another embodiment of the present invention, Figure 3 As shown, the blood purification device further includes: a cooling pump 8 and a cooling pipeline 9. The third liquid storage bag stores cooling replacement fluid (the temperature of the cooling replacement fluid may be lower than the temperature of the replacement fluid stored in the first liquid storage bag). One end of the cooling pump 8 is connected to the third liquid storage bag, and the other end of the cooling pump 8 is connected to the heating device 1 and / or the liquid pipeline 4. When the cooling pump 8 is turned on, the cooling pump 8 pumps the cooling replacement fluid in the third liquid storage bag into the cooling pipeline 9, and the cooling pipeline 9 transports the cooling replacement fluid to the heating device 1 and / or the liquid pipeline 4.

[0104] When the temperature of the replacement fluid in the liquid pipeline is too high, in addition to the above-mentioned control of the working state of the pump, other methods can be used to make the temperature of the replacement fluid in the liquid pipeline within a preset temperature range, such as Figure 7 As shown, the replacement fluid temperature control method provided by the present invention also includes the following steps:

[0105] S5: When the current temperature of the replacement fluid in the liquid pipeline is greater than the maximum preset temperature in the preset temperature range, the cooling pump is controlled to start, the cooling pump pumps the cooling replacement fluid into the cooling pipeline, and the cooling pipeline transports the cooling replacement fluid to the liquid pipeline and / or the heating device.

[0106] When the temperature of the replacement fluid in the liquid pipeline 4 is too high, the cooling pump 8 is turned on, and the cooling pump 8 pumps the cooling replacement fluid in the third liquid storage bag into the cooling pipeline 9. The cooling pipeline 9 transports the cooling replacement fluid to the heating device 1. The cooling replacement fluid is neutralized with the heated replacement fluid in the heating device 1 to lower the temperature of the replacement fluid in the liquid pipeline 4 so that the temperature of the replacement fluid in the liquid pipeline 4 is within a preset temperature range.

[0107] As another embodiment, when the temperature of the replacement fluid in the liquid pipeline 4 is too high, the cooling pump 8 is turned on, and the cooling pump 8 pumps the cooling replacement fluid in the third liquid storage bag 10 into the cooling pipeline 9. The cooling pipeline 9 can also transport the cooling replacement fluid to the liquid pipeline 4. After the cooling replacement fluid is neutralized with the high-temperature replacement fluid in the liquid pipeline 4, the temperature of the replacement fluid in the liquid pipeline 4 is reduced, so that the temperature of the replacement fluid in the liquid pipeline 4 is within a preset temperature range when it is transported to the target location (such as a dialyzer or a human body). In one embodiment of the present invention, Figure 8 As shown, before S3 (when the replacement fluid exceeds the preset temperature range, the working state of the pump is regulated according to the current temperature and the preset temperature range), the temperature control method further includes the following steps:

[0108] S6: Determine whether the current temperature is greater than a third preset temperature;

[0109] When the judgment result in S2 is yes, that is, the current temperature of the replacement fluid in the liquid pipeline is within the preset temperature range, then it is judged whether the current temperature is greater than the third preset temperature.

[0110] Specifically, the third preset temperature T3 is less than the maximum preset temperature T in the preset temperature range. max , and the third preset temperature T3 is greater than the average temperature within the preset temperature range.

[0111] Specifically, the average temperature within the preset temperature range may be an average value of a maximum preset temperature and a minimum preset temperature.

[0112] When the judgment result of S6 is yes, that is, the current temperature is greater than the third preset temperature, then the real-time temperature of the replacement fluid after the current moment is continuously obtained, and it is determined whether the real-time temperature continues to rise, that is, S7-8 is executed.

[0113] When the judgment result of S6 is no, that is, the current temperature of the replacement fluid in the liquid pipeline is less than or equal to the third preset temperature, the temperature of the replacement fluid continues to be monitored in real time.

[0114] S7: Obtain the current flow rate at which the pump pumps the replacement fluid into the heating device at the current moment.

[0115] S8: When the real-time temperature of the replacement fluid after the current moment continues to rise and the duration of the rise is greater than the third preset duration, the pump is controlled to pump the replacement fluid into the heating device at a third preset flow rate.

[0116] Specifically, the third preset time length may be 5 to 10 times the sampling period of the temperature sensor for collecting temperature data. In other words, if 5 to 10 temperature data collected continuously by the temperature sensor gradually increase, it can be determined that the liquid temperature continues to rise.

[0117] Specifically, the third preset flow rate is less than the current flow rate.

[0118] When the real-time temperature of the replacement fluid continues to rise after it exceeds the third preset temperature, and the duration is longer than the third preset duration, it means that the temperature of the replacement fluid in the liquid pipeline continues to rise. If the pump continues to pump the replacement fluid into the heating device at the current pump speed, the temperature of the replacement fluid in the liquid pipeline will continue to rise, and it is easy to make the temperature of the replacement fluid exceed the preset temperature range. When the preset temperature range is exceeded, the pump will be stopped. Therefore, the pump is controlled to pump the replacement fluid into the heating device at a speed lower than the current pump speed, so the temperature of the replacement fluid heated by the heating device will decrease, and therefore, the temperature of the replacement fluid in the liquid pipeline will also decrease, so that the temperature of the replacement fluid in the liquid pipeline will no longer continue to rise.

[0119] The present invention sets a third preset temperature. When the temperature of the replacement fluid meets the preset temperature range but exceeds the third preset temperature, and the temperature of the replacement fluid continues to rise after the current moment, and the duration of the rise exceeds the third preset duration, the pump is controlled to pump the replacement fluid into the heating device at a smaller flow rate, so as to regulate the temperature in advance, reduce the probability that the temperature of the replacement fluid will quickly exceed the preset temperature range due to the continuous rise, and reduce the frequency of pump stopping.

[0120] Example Governor

[0121] As a second aspect of the present invention, the present invention also provides a replacement fluid temperature controller for a blood purification device, such as Fig. 9 As shown, the controller 100 includes:

[0122] The data acquisition module 101 is used to acquire the current temperature of the replacement fluid in the liquid pipeline at the current moment;

[0123] That is, the data acquisition module 101 is used to execute step S1 (obtaining the current temperature of the replacement fluid in the liquid pipeline at the current moment) in the above-mentioned method for controlling the temperature of the replacement fluid of the blood purification device.

[0124] The control module 102 is used to adjust the working state of the pump according to the current temperature and the preset temperature range when the current temperature of the pipeline exceeds the preset temperature range, so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range.

[0125] The control module 102 is used to execute step S2 in the above-mentioned replacement fluid temperature control method of the blood purification equipment (when the current temperature of the pipeline exceeds the preset temperature range, the working state of the pump is regulated according to the current temperature and the preset temperature range so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range).

[0126] The present invention provides a replacement fluid regulator for a blood purification device, which monitors the real-time temperature in a liquid pipeline in real time. When the real-time temperature of the replacement fluid exceeds a preset temperature range, the working state of the pump is regulated according to the real-time temperature and the preset temperature range to reduce or increase the temperature of the replacement fluid in the liquid pipeline, so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range, thereby avoiding the negative impact caused by excessively high liquid temperature, thereby improving the safety of the blood purification device.

[0127] Exemplary Electronic Devices

[0128] Fig.10 The figure shows a structural block diagram of an electronic device according to an embodiment of the present invention.

[0129] like Fig.10 As shown, the electronic device 10 includes one or more processors 11 and a memory 12 .

[0130] The processor 11 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0131] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may run the program instructions to implement the liquid temperature control method in the pipeline of the blood purification device of each embodiment of the present invention described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0132] In one example, the electronic device 10 may further include: an input device 13 and an output device 14, and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0133] When the electronic device 10 is a stand-alone device, the input device 13 may be a communication network connector for receiving collected input signals from the first device and the second device.

[0134] In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.

[0135] The output device 14 can output various information to the outside, including the determined distance information, direction information, etc. The output device 14 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0136] Of course, to simplify, Fig.10 Only some of the components related to the present invention in the electronic device 10 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application conditions, the electronic device 10 may also include any other appropriate components.

[0137] The computer program product may be written in any combination of one or more programming languages ​​to write program code for performing the operations of the embodiments of the present invention, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0138] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0139] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A method for controlling the temperature of a replacement fluid in a blood purification device, characterized in that: The blood purification device comprises: a liquid pipeline, a pump and a heating device, wherein the pump is used to provide power for the replacement fluid to flow in the heating device and the liquid pipeline, the heating device is used to heat the replacement fluid flowing through, and the liquid pipeline is used to transport the replacement fluid heated by the heating device; Wherein, the replacement fluid temperature control method comprises: Obtaining the current temperature of the replacement fluid in the liquid pipeline at the current moment; When the current temperature of the replacement fluid in the liquid pipeline exceeds the preset temperature range, the working state of the pump is regulated according to the current temperature and the preset temperature range so that the temperature of the replacement fluid in the liquid pipeline is within the preset temperature range.

2. The temperature control method according to claim 1, characterized in that: Regulating the working state of the pump according to the current temperature and the preset temperature range includes: When the current temperature is greater than the maximum preset temperature in the preset temperature range, controlling the pump to stop working; Real-time acquisition of the real-time temperature of the replacement fluid in the liquid pipeline after the pump stops working; When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature, controlling the pump to start working; Wherein, the first preset temperature is greater than the minimum preset temperature in the preset temperature range.

3. The temperature control method according to claim 2, characterized in that: When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature, controlling the pump to start working includes: When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature for the first time, the pump is controlled to start working and pump the replacement fluid into the heating device at a first preset flow rate.

4. The temperature control method according to claim 2, characterized in that: When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature, controlling the pump to start working includes: When the real-time temperature of the replacement fluid in the liquid pipeline is lower than the first preset temperature for the first time and then continues to decrease, and the duration is longer than the first preset time, the pump is controlled to start working and pump the replacement fluid into the heating device at a first preset flow rate.

5. The temperature control method according to claim 3 or 4, characterized in that: The method further comprises: regulating the working state of the pump according to the current temperature and the preset temperature range; When the real-time temperature of the replacement fluid in the liquid pipeline is lower than a second preset temperature, the pump is controlled to start working and pump the replacement fluid into the heating device at a second preset flow rate, wherein the second preset temperature is higher than the first preset temperature and the second preset flow rate is lower than the first preset flow rate.

6. The temperature control method according to claim 1, characterized in that: The blood purification device further comprises: a cooling pump and a cooling pipeline, wherein the cooling pump is used to pump cooling replacement fluid into the cooling pipeline, and the cooling pipeline is used to transport the cooling replacement fluid to the liquid pipeline and / or the heating device, wherein the temperature of the cooling replacement fluid is lower than the current temperature of the replacement fluid in the liquid pipeline; Wherein, the temperature control method further comprises: When the current temperature of the replacement fluid in the liquid pipeline is greater than the maximum preset temperature in the preset temperature range, the cooling pump is controlled to start so that the cooling pump pumps the cooling replacement fluid into the cooling pipeline, and the cooling replacement fluid flows through the cooling pipeline to the liquid pipeline and / or the heating device.

7. The temperature control method according to claim 1, characterized in that: The blood purification device further comprises: a drainage valve and a drainage pipeline, wherein the drainage valve is used to guide part of the replacement fluid heated by the heating device into the drainage pipeline; Wherein, the temperature control method further comprises: When the current temperature of the replacement fluid in the liquid pipeline is greater than the maximum preset temperature in the preset temperature range, the drainage valve is controlled to open to output part of the replacement fluid heated in the heating device to the drainage pipeline.

8. The temperature control method according to any one of claims 1 to 5, characterized in that: The temperature control method further comprises: When the current temperature of the replacement fluid in the liquid pipeline is within the preset temperature range, and when the current temperature is greater than a third preset temperature, obtaining the real-time temperature of the replacement fluid after the current moment, the third preset temperature is less than the maximum preset temperature within the preset temperature range, and the third preset temperature is greater than the average temperature within the preset temperature range; Acquire the current flow rate at which the pump pumps the replacement fluid into the heating device at the current moment; When the real-time temperature of the replacement fluid after the current moment continues to rise and the duration is greater than the second preset duration, the pump is controlled to pump the replacement fluid into the heating device at a third preset flow rate; wherein the third preset flow rate is less than the current flow rate.

9. A blood purification device, characterized in that: include: A heating device, used to heat the replacement fluid flowing through; A liquid pipeline, used for transporting the replacement fluid heated by the heating device; A pump, used to provide power for the replacement fluid to flow in the heating device and the liquid pipeline; a temperature sensor, the temperature sensor being used to detect the temperature of the replacement fluid in the liquid pipeline; as well as A controller for executing the temperature control method according to any one of claims 1, 2, 3, 4, 5, and 8.

10. The blood purification device according to claim 9, characterized in that: Also includes: a cooling pump and a cooling pipeline, wherein the cooling pump is used to pump cooling replacement fluid into the cooling pipeline, and the cooling pipeline is used to transport the cooling replacement fluid to the liquid pipeline and / or the heating device; and / or A drainage valve and a drainage pipeline, wherein the drainage valve is used to drain part of the replacement fluid heated by the heating device into the drainage pipeline; The controller is used to execute the temperature control method described in claim 6 or 7.

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