An automatic liquid path pressure regulating device for a fully automatic biochemical analyzer

Abstract

The present invention relates to the technical field of medical devices, and specifically discloses a liquid path pressure automatic adjustment device for a fully automatic biochemical analyzer. The atmospheric pressure detection sensor, the positive pressure detection module, the negative pressure detection module, and the pump valve drive module are all electrically connected to the main control single-chip microcomputer. The liquid path water inlet system is electrically connected to the positive pressure detection module and the pump valve drive module respectively, the waste liquid treatment system is electrically connected to the negative pressure detection module and the pump valve drive module respectively, and the liquid path pressure enhancement system is electrically connected to the pump valve drive module. It can automatically adjust the liquid path pressure value of the whole machine according to the collected atmospheric pressure according to the established design method, ensure the consistency of the liquid path pressure inside the instrument under different altitudes, so as to achieve intelligent adjustment, improve the environmental adaptability of the instrument, and make it more convenient and fast for users to use the instrument.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a liquid path pressure automatic adjustment device for an automatic biochemical analyzer. Background Art

[0002] An automatic biochemical analyzer is one of the most commonly used important analytical instruments in clinical examinations, and is of great significance in aspects such as curative effect detection, health examination, drug abuse, etc. It has a fast measurement speed, high accuracy, small consumption of reagents, simple operation, adopts the principle of photoelectric colorimetry, and fully automates steps such as sample addition, reagent addition, mixing, incubation reaction, detection, numerical calculation, result display, and cleaning in the analysis process to measure a specific chemical component in body fluids, and is one of the fastest developing fields in the current medical device industry.

[0003] Currently, each enterprise designs various forms of liquid path systems according to the same working principle. The liquid path system of a biochemical analyzer mainly realizes the following functions: addition of samples and reagents, cleaning of needles, cleaning of stirring needles, cleaning of reaction cups, addition of cleaning liquid, waste liquid discharge, treatment of condensed water, waste liquid of reaction cups, evacuation treatment of the whole machine liquid path system, disinfection and maintenance treatment of waste liquid pipelines, etc.

[0004] As mentioned above, with the expansion of people's requirements for instrument functions and application ranges, the current biochemical instruments are used more and more in various regions of the world. This requires the instrument to ensure the reliable operation of the whole liquid path system under different altitudes in different regions, so as to achieve the requirements of effectively cleaning the pipeline and ensuring the test accuracy of the instrument. However, the currently designed liquid path control systems do not consider that the change in the internal pressure of the whole machine liquid path caused by the difference in altitude will result in insufficient pressure during cleaning or pressurization, thus resulting in inaccurate test results. The current design adjusts the liquid path pressure by querying the atmospheric pressure corresponding to the local altitude and inputting it into the software. The disadvantage of this method is that it is not automated enough. It is very inconvenient to query the exact atmospheric pressure values in various regions of the world, there is a certain degree of inaccuracy, and it is relatively troublesome for users to operate. Summary of the Invention

[0005] The purpose of the present invention is to provide a liquid path pressure automatic adjustment device for an automatic biochemical analyzer, which can automatically adjust the liquid path pressure value of the whole machine according to the collected atmospheric pressure according to a predetermined design method, ensure the consistency of the internal liquid path pressure of the instrument under different altitudes, thereby realizing intelligent adjustment, improving the environmental adaptability of the instrument, and making it more convenient and fast for users to use the instrument.

[0006] To achieve the above object, a liquid path pressure automatic regulation device of a full-automatic biochemical analyzer adopted by the present invention includes a main control single-chip microcomputer, an atmospheric pressure detection sensor, a positive pressure detection module, a negative pressure detection module, a pump valve drive module, a liquid path water inlet system, a waste liquid treatment system, and a liquid path pressure enhancement system;

[0007] The atmospheric pressure detection sensor, the positive pressure detection module, the negative pressure detection module, and the pump valve drive module are all electrically connected to the main control single-chip microcomputer. The liquid path water inlet system is electrically connected to the positive pressure detection module and the pump valve drive module respectively. The waste liquid treatment system is electrically connected to the negative pressure detection module and the pump valve drive module respectively. The liquid path pressure enhancement system is electrically connected to the pump valve drive module;

[0008] The atmospheric pressure detection sensor is used to detect the atmospheric pressure, output the current detected pressure value, and communicate with the main control single-chip microcomputer by adopting an analog output or digital signal output mode;

[0009] The main control single-chip microcomputer reads and processes the atmospheric pressure value detected by the atmospheric pressure detection sensor, adjusts the positive / negative parameters of the liquid path according to the designed algorithms and rules, simultaneously completes the signal acquisition and processing of the positive / negative pressure, and controls the on / off of the pump valve drive module;

[0010] The positive pressure detection module and the negative pressure detection module are used for the conversion of the positive / negative pressure liquid path pressure signals, convert the pressure value into an analog voltage value and output it for the use of the main control single-chip microcomputer;

[0011] The pump valve drive module is used to execute the commands of the main control single-chip microcomputer to realize the opening and closing of the pump valve;

[0012] The liquid path water inlet system is used to realize the water inlet control of the whole device, complete the water required by the whole machine system, and provide the necessary hardware guarantee for achieving the liquid path pressure of the whole machine;

[0013] The waste liquid treatment system is used to realize the waste liquid treatment of the whole device;

[0014] The liquid path pressure enhancement system is used to increase the pressure of the liquid path of the whole machine.

[0015] Wherein, the liquid path pressure automatic regulation device of the full-automatic biochemical analyzer further includes a liquid path positive pressure cleaning module. The liquid path positive pressure cleaning module includes a first control unit, a first power unit, a first liquid path pressure detection unit, a first pressure accumulation unit, and a second power unit. The first power unit and the second power unit are both connected to the first pressure accumulation unit. The first control unit is arranged at the input end of the first power unit. The first liquid path pressure detection unit is arranged on one side of the first pressure accumulation unit.

[0016] Wherein, the installation direction of the first control unit is opposite to the actual fluid flow direction.

[0017] Wherein, the liquid path pressure automatic regulating device of the automatic biochemical analyzer further includes a liquid path negative pressure cleaning module, and the liquid path negative pressure cleaning module includes a third power unit, a second control unit, a second liquid path pressure detection unit, a second pressure accumulation unit, and a fourth power unit. Both the third power unit and the fourth power unit are connected to the second pressure accumulation unit. The second liquid path pressure detection unit is arranged on one side of the second pressure accumulation unit, and the second control unit is arranged at the input end of the third power unit.

[0018] A liquid path pressure automatic regulating device of an automatic biochemical analyzer according to the present invention uses the atmospheric pressure detection sensor to detect the atmospheric pressure, outputs the current detected pressure value, and is connected and communicates with the main control single-chip microcomputer in an analog output or digital signal output manner; the main control single-chip microcomputer reads and processes the atmospheric pressure value detected by the atmospheric pressure detection sensor, and at the same time adjusts the positive / negative parameters of the liquid path according to the designed algorithms and rules, and simultaneously completes the signal acquisition and processing of the positive / negative pressure and controls the on / off of the pump valve drive module; the positive pressure detection module and the negative pressure detection module are used for the conversion of the positive / negative pressure liquid path pressure signals, convert the pressure value into an analog voltage value and output it for use by the main control single-chip microcomputer; the pump valve drive module is used for executing the commands of the main control single-chip microcomputer to realize the opening and closing of the pump valve; the liquid path water inlet system is used for controlling the water inlet of the entire device, completing the water required for the whole machine system, and providing the necessary hardware guarantee for achieving the liquid path pressure of the whole machine; the waste liquid treatment system is used for realizing the waste liquid treatment of the whole device; the liquid path pressure enhancement system is used for boosting the liquid path pressure of the whole machine.

[0019] Through this device, the automatic adjustment of the liquid path pressure of the whole machine can be realized. Even if the atmospheric pressure of the installation environment changes, the stable control of the internal pressure of the liquid path of the whole machine can be achieved to reach the set pressure value, ensuring that the internal pressure of the instrument meets the required liquid path pressure value at different altitudes; the problems of inaccurate instrument testing or poor cleaning effect caused by the change of liquid path pressure due to different installation environment altitudes are well solved in an automated manner; for instruments that need to be used in environments at different altitudes, the problem of unstable test results caused by insufficient liquid path pressure can be automatically solved. Mainly by opening the pressurizing components in the liquid path system to make up for the lack of pressure. When the working environment does not meet the limit values, the pressurizing components are not opened, thereby improving the service life of the liquid path components to a certain extent. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is the control principle block diagram of the liquid path pressure automatic regulation device of the full-automatic biochemical analyzer of the present invention.

[0022] Figure 2 It is the program control flow chart of the liquid path pressure automatic regulation device of the full-automatic biochemical analyzer of the present invention.

[0023] Figure 3 It is the principle schematic diagram of the liquid path positive pressure cleaning module of the present invention.

[0024] Figure 4 It is the principle schematic diagram of the liquid path negative pressure cleaning module of the present invention.

[0025] 1 - Main control single-chip microcomputer, 2 - Atmospheric pressure detection sensor, 3 - Positive pressure detection module, 4 - Negative pressure detection module, 5 - Pump valve drive module, 6 - Liquid path water inlet system, 7 - Waste liquid treatment system, 8 - Liquid path pressure enhancement system, 9 - Liquid path positive pressure cleaning module, 91 - First control unit, 92 - First power unit, 93 - First liquid path pressure detection unit, 94 - First pressure accumulation unit, 95 - Second power unit, 10 - Liquid path negative pressure cleaning module, 101 - Third power unit, 102 - Second control unit, 103 - Second liquid path pressure detection unit, 104 - Second pressure accumulation unit, 105 - Fourth power unit. Detailed implementation manners

[0026] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, in the description of the present invention, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0028] Please refer to Figures 1 to 4 , the present invention provides a liquid path pressure automatic adjustment device for a fully automatic biochemical analyzer, including a main control single-chip microcomputer 1, an atmospheric pressure detection sensor 2, a positive pressure detection module 3, a negative pressure detection module 4, a pump valve drive module 5, a liquid path water inlet system 6, a waste liquid treatment system 7, and a liquid path pressure enhancement system 8;

[0029] The atmospheric pressure detection sensor 2, the positive pressure detection module 3, the negative pressure detection module 4, and the pump valve drive module 5 are all electrically connected to the main control single-chip microcomputer 1. The liquid path water inlet system 6 is electrically connected to the positive pressure detection module 3 and the pump valve drive module 5 respectively. The waste liquid treatment system 7 is electrically connected to the negative pressure detection module 4 and the pump valve drive module 5 respectively. The liquid path pressure enhancement system 8 is electrically connected to the pump valve drive module 5;

[0030] The atmospheric pressure detection sensor 2 is used to detect the atmospheric pressure, output the current detected pressure value, and communicate with the main control single-chip microcomputer 1 in an analog output or digital signal output manner;

[0031] The main control single-chip microcomputer 1 reads and processes the atmospheric pressure value detected by the atmospheric pressure detection sensor 2, adjusts the positive / negative parameters of the liquid path according to the designed algorithms and rules, and simultaneously completes the signal acquisition and processing of the positive / negative pressure and controls the on / off of the pump valve drive module 5;

[0032] The positive pressure detection module 3 and the negative pressure detection module 4 are used to convert the positive / negative pressure liquid path pressure signals, convert the pressure values into analog voltage values and output them for use by the main control single-chip microcomputer 1;

[0033] The pump valve drive module 5 is used to execute the commands of the main control single-chip microcomputer 1 to realize the opening and closing of the pump valve;

[0034] The liquid path water inlet system 6 is used to control the water inlet of the entire device, complete the water required for the whole machine system, and provide the necessary hardware guarantee for achieving the liquid path pressure of the whole machine;

[0035] The waste liquid treatment system 7 is used to realize the treatment of waste liquid in the whole device;

[0036] The liquid path pressure enhancement system 8 is used to boost the pressure of the whole machine's liquid path.

[0037] The main control single-chip microcomputer 1 is an STM32 single-chip microcomputer.

[0038] The water inlet system of the path is composed of a water inlet pump, a water inlet pipeline and valves.

[0039] The waste liquid treatment system 7 is composed of a waste liquid pump that generates vacuum and a three-way waste liquid pipeline.

[0040] In this embodiment, the atmospheric pressure detection sensor 2 completes the detection of the atmospheric pressure. The selected sensor needs to have temperature compensation and calibration functions to improve the detection accuracy; the main control single-chip microcomputer 1 realizes the reading and processing of the pressure of the atmospheric pressure detection sensor 2, and at the same time adjusts the positive / negative parameters of the liquid path according to the designed algorithms and rules, and at the same time completes the signal acquisition and processing of the positive / negative pressure and controls the on / off of the pump valve drive module 5; the positive pressure detection module 3 and the negative pressure detection module 4 mainly complete the conversion of the pressure signals of the positive / negative pressure liquid path system of the liquid path system. The special liquid path pressure sensor converts the pressure value into an analog voltage value and outputs it, and reads the pressure value according to the established amplification factor; the pump valve drive module 5 mainly completes the execution of the commands of the main control single-chip microcomputer 1 and realizes the accurate opening and closing of the pump valve; the liquid path water inlet system 6 is composed of necessary materials such as a water inlet pump, a water inlet pipeline, and valves; the waste liquid treatment system 7 is mainly composed of a waste liquid pump that generates vacuum and a three-way waste liquid pipeline.

[0041] The liquid path pressure enhancement system 8 mainly completes the function of enhancing the positive / negative pressure. When the liquid path pressure value cannot meet the set value, turning on this system can realize the function of enhancing the liquid path pressure.

[0042] After the instrument is powered on, the main control module reads the current atmospheric pressure value and determines whether the atmospheric pressure value exceeds the set range. If the atmospheric pressure value exceeds this range, it is necessary to correct the positive / negative pressure limits in the liquid path system and modify the threshold according to the established rules and algorithms.

[0043] When within the normal range of values, testing can be carried out according to the default liquid path pressure parameter values without correction. The following focuses on the working mode of the system when the atmospheric pressure value exceeds the established range. As described above, when the system pressure exceeds the range, the target pressure value set inside the liquid path pipeline is adjusted, and at the same time, an auxiliary pressurization device is turned on to increase the internal pressure value of the liquid path. Of course, it is necessary to monitor the magnitude of the positive / negative pressure values of the liquid path simultaneously. When the predetermined positive / negative pressure values are reached, the auxiliary pressurization device is turned off to extend the life of the components. When an abnormal situation occurs, that is, when the liquid path pressure value cannot reach the predetermined value, the liquid path pressurization module is alarmed as abnormal and the user is prompted to find the cause.

[0044] Further, it can be explained in detail that the atmospheric pressure detection sensor 2 is mainly a detection sensor with temperature compensation and automatic calibration, which can output the currently detected pressure value and is connected and communicates with the main control single-chip microcomputer 1 in an analog output or digital signal output mode;

[0045] The main control single-chip microcomputer 1 realizes functions such as reading the atmospheric pressure value, reading the positive / negative pressure signals of the liquid path, implementing the pressure adjustment algorithm, and controlling the peripheral pumps and valves.

[0046] The positive pressure detection module 3 and the negative pressure detection module 4 complete the conversion of the liquid path pressure signal from the liquid path pressure to a voltage value and provide it for the main control single-chip microcomputer 1 to use.

[0047] The pump valve drive module 5 mainly realizes the control and drive of the liquid path pump and valve components, and the main internal components are switching components such as MOS transistors.

[0048] The liquid path water inlet system 6 mainly realizes the water inlet control of the entire system, completes the water required for the entire machine system, and provides the necessary hardware guarantee for achieving the liquid path pressure of the entire machine.

[0049] The waste liquid treatment system 7 mainly realizes the waste liquid treatment of the entire system, including treatment methods that adopt power and gravity discharge methods.

[0050] The liquid path pressure enhancement system 8 mainly realizes the pressurization function of the liquid path system and provides stronger pressurization processing for the liquid path system. Specifically, it is reflected in the enhancement of the positive and negative pressure values of the liquid path, thereby realizing the pressurization function.

[0051] The entire control process of the liquid path pressure automatic adjustment device of the fully automatic biochemical analyzer is as follows: First, the system completes the initialization of the main control board program variables and adjusts the parameters of the atmospheric pressure detection pressure sensor at the same time, calibrates and compensates in combination with the current temperature to ensure the accuracy of reading the atmospheric pressure value. In the actual program implementation, an algorithm needs to be processed on the read value of the atmospheric pressure to obtain the current atmospheric pressure value. After obtaining this value, the program determines whether it exceeds the set value. When it is within the range, there is no need to adjust the size of the internal liquid path pressure parameter value; when it exceeds the range, the current default liquid path pressure parameter needs to be corrected or adjusted to ensure the stable and reliable liquid path pressure. After the positive / negative pressure in the liquid path is set, the size of the current actual positive / negative pressure value in the liquid path is read. If the test value is less than the set Flucurrent_value value, the liquid path pressurization system is started until the liquid path system pressure reaches the set value. If the pressure cannot reach the set value during the process of starting the pressurization system, the alarm mechanism is started. The user is notified that there is an abnormality in the system water supply pressurization module or the water supply is abnormal and maintenance is required. When the internal pressure value of the liquid path reaches the specified pressure value, the liquid path pressurization system is closed. This process continuously repeats the determination to make the pressure of the entire liquid path system dynamically stable.

[0052] A liquid path pressure automatic adjustment device of a fully automatic biochemical analyzer provided by the present invention can realize the automatic adjustment of the liquid path pressure of the whole machine through this device. Even if the atmospheric pressure of the installation environment changes, it can also realize the stable control of the internal pressure of the liquid path of the whole machine to reach the set pressure value, ensuring that the internal pressure of the instrument reaches the required liquid path pressure value at different altitudes; problems such as inaccurate instrument testing or poor cleaning effect caused by the change of the liquid path pressure due to different installation environment altitudes are better solved in an automated manner; for instruments that need to be used in environments at different altitudes, it can automatically solve the problem of unstable test results caused by insufficient liquid path pressure. It mainly makes up for the lack of pressure by starting the pressurization component in the liquid path system. When the working environment does not meet the limit value, the pressurization component is not started, thereby improving the service life of the liquid path component to a certain extent.

[0053] Further, the liquid path pressure automatic adjustment device of the fully automatic biochemical analyzer further includes a liquid path positive pressure cleaning module 9. The liquid path positive pressure cleaning module 9 includes a first control unit 91, a first power unit 92, a first liquid path pressure detection unit 93, a first pressure accumulation unit 94, and a second power unit 95. The first power unit 92 and the second power unit 95 are both connected to the first pressure accumulation unit 94. The first control unit 91 is arranged at the input end of the first power unit 92, and the first liquid path pressure detection unit 93 is arranged on one side of the first pressure accumulation unit 94.

[0054] The installation direction of the first control unit 91 is opposite to the actual fluid flow direction.

[0055] In this embodiment, as Figure 3 shown, the first control unit 91 of the positive pressure cleaning module 9 of the liquid path includes a direct-acting two-way solenoid valve to realize the opening and closing of the pressure enhancement system; based on the working principles of the direct-acting solenoid valve and the analyzer, the installation direction of this valve needs to be different from the actual fluid flow direction.

[0056] The first power unit 92 mainly realizes the pressure enhancement of the liquid path system; its control method is based on whether the current liquid path pressure value meets the set value of the liquid path system within a set time to achieve the enhancement purpose.

[0057] The first liquid path pressure detection unit 93 is mainly a fluid pressure detection sensor with temperature compensation and automatic calibration, which can output the current detected pressure value, adopt analog signal output to connect with the main control single-chip microcomputer 1 and convert it into a digital signal through the ADC module inside the main control single-chip microcomputer 1 to read the current liquid path pressure value.

[0058] The first pressure accumulator unit 94 includes a recyclable energy storage structure device to realize a stable pressure value of the cleaning module; and it has significant design value for reducing the frequent start of the power structure and prolonging its service life.

[0059] The second power unit 95 mainly realizes the pressure supply of the liquid path system; its control method is based on the current liquid path pressure value to start the opening and closing operations to achieve the conventional pressure value required by the liquid path system.

[0060] Further, the liquid path pressure automatic adjustment device of the fully automatic biochemical analyzer further includes a liquid path negative pressure cleaning module 10. The liquid path negative pressure cleaning module 10 includes a third power unit 101, a second control unit 102, a second liquid path pressure detection unit 103, a second pressure accumulator unit 104, and a fourth power unit 105. The third power unit 101 and the fourth power unit 105 are both connected to the second pressure accumulator unit 104. The second liquid path pressure detection unit 103 is arranged on one side of the second pressure accumulator unit 104, and the second control unit 102 is arranged at the input end of the third power unit 101.

[0061] In this embodiment, as Figure 4 shown, the third power unit 101 of the liquid path negative pressure cleaning module 10 mainly realizes the pressure enhancement of the liquid path system; its control method is based on whether the current waste liquid treatment pressure value meets the set value of the liquid path system within a set time to achieve the pressure enhancement purpose.

[0062] The second control unit 102 includes a direct-acting two-way solenoid valve to realize the opening and closing of the pressure enhancement system.

[0063] The second liquid path pressure detection unit 103 is mainly a vacuum degree detection sensor with temperature compensation and automatic calibration, which can output the absolute pressure value detected currently. It adopts the analog output signal output mode to connect with the main control single-chip microcomputer 1, and is converted into a digital signal through the ADC module inside the main control single-chip microcomputer 1 to read the current pressure value.

[0064] The second pressure accumulation unit 104 is a recyclable vacuum energy storage structure device, which provides a stable pressure value for waste liquid treatment; it has obvious improvement in the efficiency and effect of waste liquid treatment, and reduces the frequent start of the power device, and has significant design value for prolonging the service life of liquid path components.

[0065] The fourth power unit 105 mainly realizes the pressure supply of the waste liquid treatment system 7 and realizes the conventional vacuum pressure value required by the waste liquid treatment system 7.

[0066] In summary, the atmospheric pressure detection sensor 2 includes a sensing element for detecting atmospheric pressure, and the characteristics of this element are calibrated, temperature compensated and amplified to ensure reliable detection. The atmospheric pressure sensor is used to measure the pressure exerted by the atmosphere and convert it into a voltage value. Such devices can usually measure the absolute pressure applied to the top of the chip, while the bottom of the chip provides a vacuum-sealed reference pressure. They support simplified system design by reducing external components. Such sensors can output digital signals or analog voltages to obtain the magnitude of the atmospheric pressure value. The detection range of such atmospheric pressure sensors is 15 kPa to 115 kPa, which can fully satisfy the atmospheric pressure detection at altitudes from sea level to positions over 4000 meters.

[0067] The main control single-chip microcomputer 1 module is composed of the STM32 series or can also be composed of other MCUs. It mainly completes the monitoring and reading of the pressure value output by the atmospheric pressure sensor, and at the same time starts the control of the liquid path pump valve system according to the established rules; at the same time, in order to confirm the effect of the liquid path pressure adjustment, the pressure inside the liquid path is read and confirmed. If the corresponding pressure enhancement device is started, but the internal liquid path pressure still cannot meet the requirements, an alarm needs to be given to prompt the user that the current liquid path system has a fault. Thus, the reliability of the liquid path system pressure is determined.

[0068] The pump valve drive unit module is composed of switching elements such as MOS transistors and triodes, and mainly realizes the control of opening and closing the pump valve.

[0069] The liquid path water inlet system 6 and the waste liquid treatment system 7 mainly complete the functions of supplying water and discharging waste liquid for the whole machine's liquid path. It is mainly divided into a water supply part and a waste liquid treatment part. It completes the functions of pressurizing the water supply for the whole machine and the power discharge of the waste liquid. The pump valve control of the entire liquid path system is controlled by the main control single-chip microcomputer 1, and the liquid path pressure is automatically adjusted according to the current atmospheric pressure to reach the specified value, achieving the purpose of automatic liquid path pressure regulation.

[0070] A liquid path pressure automatic adjustment device for a fully automatic biochemical analyzer provided by the present invention automatically adjusts the liquid path pressure value of the whole machine according to the collected atmospheric pressure according to the established design method, ensuring the consistency of the internal liquid path pressure of the instrument under different altitudes, thereby realizing intelligent adjustment and improving the environmental adaptability of the instrument. Based on the above design implementation, it can make it more convenient and fast for users to use the instrument without any other operations. At the same time, it can also ensure the reliability of the instrument's liquid path operation and provide guarantee for the accuracy of test results.

[0071] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. An automatic liquid path pressure regulating device for a fully automatic biochemical analyzer, characterized in that, it includes a main control single-chip microcomputer, an atmospheric pressure detection sensor, a positive pressure detection module, a negative pressure detection module, a pump valve drive module, a liquid path water inlet system, a waste liquid treatment system, and a liquid path pressure enhancement system; the atmospheric pressure detection sensor, the positive pressure detection module, the negative pressure detection module, and the pump valve drive module are all electrically connected to the main control single-chip microcomputer, the liquid path water inlet system is electrically connected to the positive pressure detection module and the pump valve drive module respectively, the waste liquid treatment system is electrically connected to the negative pressure detection module and the pump valve drive module respectively, and the liquid path pressure enhancement system is electrically connected to the pump valve drive module; the atmospheric pressure detection sensor is used to detect the atmospheric pressure, output the current detected pressure value, and connect and communicate with the main control single-chip microcomputer in an analog output or digital signal output manner; the main control single-chip microcomputer reads and processes the atmospheric pressure value detected by the atmospheric pressure detection sensor, adjusts the positive / negative parameters of the liquid path according to the designed algorithms and rules, simultaneously completes the signal acquisition and processing of the positive / negative pressure, and controls the on / off of the pump valve drive module; the positive pressure detection module and the negative pressure detection module are used to convert the positive / negative pressure liquid path pressure signals, convert the pressure values into analog voltage values and output them for use by the main control single-chip microcomputer; the pump valve drive module is used to execute the commands of the main control single-chip microcomputer to realize the opening and closing of the pump valve; the liquid path water inlet system is used to control the water inlet of the entire device, complete the water required for the whole machine system, and provide the necessary hardware guarantee for achieving the liquid path pressure of the whole machine; the waste liquid treatment system is used to realize the waste liquid treatment of the entire device; the liquid path pressure enhancement system is used to increase the pressure of the liquid path of the whole machine; the automatic liquid path pressure regulating device for the fully automatic biochemical analyzer further includes a liquid path positive pressure cleaning module, and the liquid path positive pressure cleaning module includes a first control unit, a first power unit, a first liquid path pressure detection unit, a first pressure accumulation unit, and a second power unit. The first power unit and the second power unit are both connected to the first pressure accumulation unit. The first control unit is arranged at the input end of the first power unit, and the first liquid path pressure detection unit is arranged on one side of the first pressure accumulation unit.

2. The automatic liquid path pressure regulating device for the fully automatic biochemical analyzer according to claim 1, characterized in that, the installation direction of the first control unit is opposite to the actual fluid flow direction.

3. The automatic liquid path pressure regulating device for the fully automatic biochemical analyzer according to claim 1, characterized in that, The liquid path pressure automatic adjustment device of the fully automatic biochemical analyzer further includes a liquid path negative pressure cleaning module. The liquid path negative pressure cleaning module includes a third power unit, a second control unit, a second liquid path pressure detection unit, a second pressure accumulation unit, and a fourth power unit. The third power unit and the fourth power unit are both connected to the second pressure accumulation unit. The second liquid path pressure detection unit is arranged on one side of the second pressure accumulation unit. The second control unit is arranged at the input end of the third power unit.

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