Liquid path system for biochemical analyzer

Abstract

The utility model relates to the technical field of biochemical analyzers, and discloses a liquid path system for a biochemical analyzer, which comprises a water adding module comprising a negative pressure water absorption unit and a constant pressure unit connected to the output end of the negative pressure water absorption unit; the reaction cup cleaning module comprises a sample adding needle cleaning unit, a reagent needle cleaning unit and a stirring paddle cleaning unit; a waste liquid collection module; the water adding module is connected with a defoaming unit at the output end of the constant pressure unit, the defoaming unit comprises a vacuum pump and a defoaming device, and the sample adding needle cleaning unit, the reagent needle cleaning unit, the stirring paddle cleaning unit and the reaction cup liquid inlet unit are all connected to a water outlet of the defoaming device. The water outlet ends of the sample adding needle cleaning unit, the reagent needle cleaning unit, the stirring paddle cleaning unit and the reaction cup liquid outlet unit are connected with the waste liquid collecting module.

Description

Technical Field

[0001] This utility model relates to the field of electrical measurement technology for biochemical analyzers, and in particular to a liquid circuit system for biochemical analyzers. Background Technology

[0002] An automated biochemical analyzer is an instrument that measures specific chemical components in body fluids based on the principle of photoelectric colorimetry. It is characterized by its fast measurement speed, high accuracy, and low reagent consumption.

[0003] With the increasing adoption of biochemical analyzers in clinical testing, their high sensitivity, good selectivity, fast analysis speed, and wide linear range are gaining wider recognition. Currently, the fluidization system of fully automated biochemical analyzers is the core execution module. The fluidization system mainly includes: sample reagent injection module, washing solution injection module, reaction vessel incubation module, reaction vessel cleaning module, washing solution preparation module, and waste liquid treatment module. However, existing biochemical analyzer fluidization systems suffer from problems such as water bubbles adhering to the tube walls during cleaning, leading to cross-contamination due to incomplete cleaning. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a liquid circuit system for a biochemical analyzer.

[0005] The technical solution of this utility model is as follows: a liquid circuit system for a biochemical analyzer, including a water addition module, comprising a negative pressure water absorption unit and a constant pressure unit connected to the output end of the negative pressure water absorption unit, for maintaining the water pressure of the liquid circuit system; a reaction cup cleaning module, comprising a reaction cup inlet unit and a reaction cup outlet unit, for cleaning the reaction cup in the reaction dish by drawing liquid; a sample injection cleaning module, comprising a sample needle cleaning unit, a reagent needle cleaning unit, and a stirrer cleaning unit, for cleaning the sample needle, reagent needle, and stirrer; and a waste liquid collection module for collecting the generated waste liquid; the water addition module is connected to an antifoaming unit at the output end of the constant pressure unit, the antifoaming unit comprising a vacuum pump and an antifoamer, the sample needle cleaning unit, the reagent needle cleaning unit, the stirrer cleaning unit, and the reaction cup inlet unit are all connected to the outlet of the antifoamer, and the outlets of the sample needle cleaning unit, the reagent needle cleaning unit, the stirrer cleaning unit, and the reaction cup outlet unit are all connected to the waste liquid collection module.

[0006] As can be seen from the above scheme, the reaction cup cleaning module rinses the reaction cup by introducing liquid into the reaction cup through the reaction cup liquid inlet unit, the reaction cup liquid outlet unit is used to draw out the cleaned liquid from the reaction cup, and the waste liquid collection module is used to collect the waste liquid generated during the cleaning process.

[0007] The negative pressure water absorption unit includes a water replenishment tank, a diaphragm pump connected to the water replenishment tank, and a buffer tank. The vent port on the buffer tank is connected to the vent through the diaphragm pump. The water inlet port on the buffer tank is connected to the water replenishment tank. The water outlet port on the buffer tank is connected to the sample cleaning module and the reaction cup liquid inlet unit, respectively. Therefore, the buffer tank automatically replenishes water by creating negative pressure within it after venting through the diaphragm pump.

[0008] Both the sample needle cleaning unit and the reagent needle cleaning unit include a control valve, a plunger pump, a throttle valve, and a three-way connector. The first connector of the three-way connector is connected to the water supply module, the second connector of the three-way connector is connected to the sample needle tube through the control valve, and the third connector of the three-way connector is connected to the needle cleaning tank through the throttle valve. The plunger pump is located between the control valve and the sample needle tube. Therefore, water enters through the first connector of the three-way connector, and the three-way connector cleans the sample needle tube and the needle cleaning tank through the second and third connectors, simultaneously cleaning the inner and outer walls of the sample needle and reagent needle.

[0009] The waste liquid collection module includes a water supply pump and a waste liquid collection tank connected to the water supply pump. A liquid level sensor is installed inside the waste liquid collection tank. Therefore, the waste liquid collection tank is used to collect waste liquid generated during the cleaning process, and the liquid level sensor is used to monitor the liquid level in the waste liquid collection tank, facilitating centralized waste liquid disposal.

[0010] The waste liquid collection module includes a water supply pump and a waste liquid collection tank connected to the water supply pump. A liquid level sensor is installed inside the waste liquid collection tank. Therefore, the waste liquid collection tank is used to achieve centralized collection of waste liquid.

[0011] The fluid circuit system for the biochemical analyzer also includes a control unit, which is electrically connected to the diaphragm pump, the water pump, and the constant pressure unit.

[0012] The constant pressure unit uses a hydraulic constant pressure device. Attached Figure Description

[0013] Figure 1 This is a connection diagram of this utility model;

[0014] Figure 2 This is a partial connection diagram of this utility model. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] like Figures 1 to 2As shown, this utility model is a liquid circuit system for a biochemical analyzer, including a water addition module 1, which includes a negative pressure water absorption unit and a constant pressure unit connected to the output end of the negative pressure water absorption unit to maintain the water pressure of the liquid circuit system; a reaction cup cleaning module, which includes a reaction cup inlet unit and a reaction cup outlet unit to clean the reaction cup in the reaction dish by drawing liquid; a sample injection cleaning module, which includes a sample needle cleaning unit, a reagent needle cleaning unit, and a stirrer cleaning unit to clean the sample needle, reagent needle, and stirrer; and a waste liquid collection module 6, which is used for... The system collects the generated waste liquid. The water addition module 1 is connected to a defoaming unit at the output of the constant pressure unit. The defoaming unit includes a vacuum pump 3 and a defoamer 4. The sample needle cleaning unit, reagent needle cleaning unit, stirring paddle cleaning unit, and reaction cup liquid inlet unit are all connected to the outlet of the defoamer 4. The outlets of the sample needle cleaning unit, reagent needle cleaning unit, stirring paddle cleaning unit, and reaction cup liquid outlet unit are all connected to the waste liquid collection module. The constant pressure unit uses a liquid circuit constant pressure device 2. In this embodiment, the stirring paddle cleaning unit cleans by injecting water into the pipe, combined with the rotation of the stirring paddle. The reaction cup cleaning module includes an injection module and a suction module. The injection module injects liquid into the reaction cup, and the suction module suctions the liquid after cleaning. In this embodiment, the liquid circuit system has an independent power supply that stably and continuously provides negative pressure. The water addition module is electrically connected to a pressure detection device to display the values ​​of high pressure, low pressure, and negative pressure.

[0017] The negative pressure water absorption unit includes a water replenishment tank 11, a diaphragm pump 12 connected to the water replenishment tank 11, and a buffer tank 13. The exhaust port 131 on the buffer tank 13 is connected to the exhaust port through the diaphragm pump 12. The water inlet port on the buffer tank 13 is connected to the water replenishment tank 11. The water outlet port on the buffer tank 13 is connected to the sample cleaning module and the reaction cup liquid inlet unit, respectively.

[0018] Both the sample needle cleaning unit and the reagent needle cleaning unit include a control valve 51, a plunger pump 52, a throttle valve 53, and a three-way connector 54. The first connector of the three-way connector 54 is connected to the water supply module 1, the second connector of the three-way connector 54 is connected to the sample needle tube 55 through the control valve 51, and the third connector of the three-way connector 54 is connected to the needle cleaning tank 56 through the throttle valve 53. The plunger pump 52 is located between the control valve 51 and the sample needle tube 55. In this embodiment, during the cleaning of the sample needle and reagent needle, the buffer tank 13 supplies water by drawing water under negative pressure. The water is then divided into two paths through the three-way connector 54. One path goes through the throttle valve 53 to the needle cleaning tank 56, and the other path passes through the control valve 51 and the plunger pump 52 and exits from the sample needle tube 55, cleaning the inner wall of the sample needle tube 55, thus cleaning both the inner and outer walls simultaneously.

[0019] The waste liquid collection module 6 includes a water supply pump 61 and a waste liquid collection tank 62 connected to the water supply pump 61. A liquid level sensor is installed inside the waste liquid collection tank 62. In this embodiment, the water outlets of the sample needle cleaning unit, the reagent needle cleaning unit, the stirrer cleaning unit, and the reaction cup dispensing unit are all connected to the waste liquid collection tank 62.

[0020] The fluid circuit system for the biochemical analyzer also includes a control unit, which is electrically connected to the diaphragm pump 12, the water pump, and the constant pressure unit.

[0021] The working process of this utility model is as follows: the gas in the buffer tank 13 is discharged through the first port and the exhaust port 131 by the diaphragm pump 12, thereby forming a negative pressure in the buffer tank 13. The water in the water replenishment tank 11 is drawn into the buffer tank 13 through the second port. The water flows through the third port and passes through the liquid circuit constant pressure device 2 for constant pressure regulation to achieve high pressure water output. After the water passes through the defoamer 4 for defoaming, it is supplied to the sample needle cleaning unit, reagent needle cleaning unit, stirring paddle cleaning unit and reaction cup liquid inlet unit respectively to avoid bubbles adhering to the tube wall, thereby reducing the pollution caused by incomplete cleaning. After the biochemical reaction is completed, the waste liquid of each module is discharged into the waste liquid collection tank 62.

[0022] Finally, it should be emphasized that the above description is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fluidic circuit system for a biochemical analyzer, characterized in that, The biochemical analyzer comprises a water adding module (1), a reaction cup cleaning module, a sample adding cleaning module, a waste liquid collecting module (6), and a constant pressure unit. The water adding module (1) is connected with a defoaming unit at the output end of the constant pressure unit, the defoaming unit comprises a vacuum pump (3) and a defoaming device (4), the sample adding needle cleaning unit, the reagent needle cleaning unit, the stirring paddle cleaning unit and the reaction cup liquid inlet unit are connected to the water outlet of the defoaming device (4), and the water outlets of the sample adding needle cleaning unit, the reagent needle cleaning unit, the stirring paddle cleaning unit and the reaction cup liquid outlet unit are connected with the waste liquid collecting module. The negative pressure water suction unit comprises a water supplement tank (11), a diaphragm pump (12) connected with the water supplement tank (11) and a buffer tank (13), an exhaust interface (131) on the buffer tank (13) is connected with an exhaust port through the diaphragm pump (12), a water inlet interface on the buffer tank (13) is connected with the water supplement tank (11), and water outlet interfaces on the buffer tank (13) are connected with the sample adding cleaning module and the reaction cup liquid inlet unit respectively. The sample adding needle cleaning unit and the reagent needle cleaning unit each comprise a control valve (51), a plunger pump (52), a throttle valve (53) and a tee joint (54), the first joint of the tee joint (54) is connected with the water adding module (1), the second joint of the tee joint (54) is connected with a sample adding needle tube (55) through the control valve (51), the third joint of the tee joint (54) is connected with a needle tube cleaning pool (56) through the throttle valve (53), and the plunger pump (52) is arranged between the control valve (51) and the sample adding needle tube (55). The waste liquid collecting module (6) comprises a water supply pump (61) and a waste liquid collecting barrel (62) connected with the water supply pump (61), and a liquid level sensor is arranged in the waste liquid collecting barrel (62). The biochemical analyzer further comprises a control unit electrically connected with the diaphragm pump (12), the water pump and the constant pressure unit.

2. The liquid path system for a biochemical analyzer according to claim 1, characterized by: The constant pressure unit adopts a liquid path constant pressure device (2).

3. The liquid path system for a biochemical analyzer according to claim 1, characterized by: ​ 4. The liquid path system for a biochemical analyzer according to claim 1, characterized by: ​ 5. The fluid path system for a biochemical analyzer according to claim 2, wherein: ​ 6. The fluid path system for a biochemical analyzer according to claim 1, wherein: ​

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