Cleaning fluid centralized supply system and analyzer

Abstract

The utility model is applicable to the field of biochemical analyzers, and provides a cleaning liquid centralized supply system and an analyzer, which comprises a liquid storage device, a liquid supply pool, a liquid level measuring module and a centralized liquid supply module, the liquid level measurement module comprises a sampling needle, a driving unit and a capacitance detection unit; the sampling needle is driven by the driving unit and moves in the vertical direction at the inlet of the liquid storage device, so that a stroke signal of the sampling needle can be obtained; the sampling needle is connected with the capacitance detection unit, so that a capacitance change signal when the sampling needle is in contact with the reinforced cleaning liquid can be obtained, and the control unit can detect the liquid level position by utilizing a stroke signal of the driving unit and the capacitance change signal of the capacitance detection unit; and an electromagnetic valve and a liquid pump in the centralized liquid supply module are controlled to supply liquid automatically according to a page position detection result. The diameter of the sampling needle is small, so that the sampling needle can be directly inserted into the small-capacity liquid storage device, the problem of liquid level detection of the small-capacity liquid storage device can be solved, and the volume of the liquid storage device is not increased.

Description

Technical Field

[0001] The utility model belongs to the field of biochemical analyzers, and in particular relates to a cleaning liquid centralized supply system and an analyzer. Background Art

[0002] In existing biochemical analyzers, the sampling needle needs to be intensively cleaned at regular intervals, or after the sampling needle absorbs a highly contaminated sample, it also needs to be intensively cleaned.

[0003] Since cleaning fluids are generally acid and alkali, long-term storage in a large-capacity reservoir will result in excessive impurities in the cleaning fluid, so the cleaning fluid is often stored in a small-capacity reservoir. During the enhanced cleaning process, the sampling needle needs to draw a small amount of cleaning fluid from the reservoir each time. If the remaining amount of enhanced cleaning agent in the reservoir is lower than the safety threshold after multiple sampling needle draws, the cleaning reagent will not be able to submerge the sample needle to be cleaned, resulting in poor cleaning effect, and the analysis process cannot run smoothly. The existing automatic supply of enhanced cleaning agent system needs to detect the liquid level position of the enhanced cleaning agent.

[0004] However, due to the small capacity of the enhanced cleaning agent reservoir, it is difficult to integrate conventional liquid level detection sensors into the enhanced cleaning agent reservoir. In addition, due to the large volume of conventional liquid level detection sensors, the volume of the enhanced cleaning agent reservoir increases accordingly, resulting in multiple enhanced cleaning agent reservoirs occupying too much space in the analyzer. Utility Model Content

[0005] The embodiment of the utility model provides a centralized cleaning liquid supply system, aiming to solve the problems of liquid level detection and automatic liquid supply of a small-capacity liquid storage device in the prior art.

[0006] The embodiment of the utility model also provides a centralized cleaning liquid supply system, comprising: a liquid reservoir, a liquid supply tank, a liquid level measurement module and a centralized liquid supply module; the liquid level measurement module comprises a sampling needle, a driving unit and a capacitance detection unit, the sampling needle is hollow inside, the sampling needle is connected to the capacitance detection unit, the driving unit moves the sampling needle, the driving unit moves the sampling needle in a vertical direction at the entrance of the liquid reservoir, and the capacitance detection unit is used to detect the capacitance change when the sampling needle contacts the liquid; the centralized liquid supply module comprises a liquid pump, a solenoid valve and a control unit, the control unit is connected to the capacitance detection unit and the solenoid valve, the liquid pump is connected to the liquid supply tank through a pipeline, the liquid pump supplies liquid to the liquid reservoir through a pipeline, and the solenoid valve is arranged between the liquid pump and the liquid reservoir.

[0007] In some embodiments, a liquid level sensor is further provided in the liquid supply tank, and the liquid level sensor is connected to the control unit.

[0008] In some embodiments, a bubble sensor is further provided between the liquid pump and the liquid reservoir, and the bubble sensor is connected to the control unit.

[0009] In some embodiments, the liquid pump supplies liquid to the bottom of the liquid reservoir through a pipeline.

[0010] In some embodiments, the liquid pump supplies liquid from the top of the liquid reservoir through a pipeline.

[0011] In some embodiments, the liquid reservoir is multiple.

[0012] In some embodiments, the reservoir volume is less than 100 ml.

[0013] In some embodiments, a bubble eliminator is further provided between the liquid pump and the solenoid valve.

[0014] In some embodiments, the liquid supply tank pipeline opening is arranged at the bottom.

[0015] An embodiment of the utility model further provides an analyzer, comprising a centralized cleaning liquid supply system according to any one of the above-mentioned embodiments.

[0016] The beneficial effects achieved by the utility model are as follows: the sampling needle is driven by the driving unit and moves in the vertical direction at the entrance of the liquid reservoir, so the stroke signal of the sampling needle can be obtained; and because the sampling needle is connected to the capacitance detection unit, the capacitance change signal when the sampling needle contacts the enhanced cleaning liquid can be obtained, and the control unit can use the stroke signal of the driving unit and the capacitance change signal of the capacitance detection unit to detect the liquid level position, and control the solenoid valve and liquid pump in the centralized liquid supply module to automatically supply liquid according to the page position detection result. Since the sampling needle has a small diameter, it can be directly inserted into a small-capacity liquid reservoir, which can solve the problem of liquid level detection of a small-capacity liquid reservoir without increasing the volume of the liquid reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a centralized cleaning liquid supply system provided by an embodiment of the utility model;

[0018] Reference numerals

[0019] 100, liquid supply tank; 110, liquid level sensor; 200, liquid pump; 210, bubble sensor; 220, bubble eliminator; 230, solenoid valve; 240, control unit; 300, liquid reservoir; 400, sampling needle; 410, capacitance detection unit; 420, driving unit. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0021] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use scenarios of other materials.

[0025] Embodiment 1

[0026] like Figure 1 As shown, the present application provides a centralized cleaning liquid supply system, including a liquid reservoir 300, a liquid supply tank 100, a liquid level measurement module and a centralized liquid supply module; the liquid level measurement module includes a sampling needle 400, a driving unit 420 and a capacitance detection unit 410, the sampling needle 400 is hollow inside, the sampling needle 400 is connected to the capacitance detection unit 410, the driving unit 420 enables the sampling needle 400 to move in a vertical direction at the entrance of the liquid reservoir, and the capacitance detection unit 410 is used to detect the capacitance change when the sampling needle 400 contacts the liquid; the centralized liquid supply module includes a liquid pump 200, a solenoid valve 230 and a control unit 240, the control unit 240 is connected to the capacitance detection unit 410 and the solenoid valve 230, the liquid pump 200 is connected to the liquid supply tank 100 through a pipeline, the liquid pump 200 supplies liquid to the liquid reservoir 300 through a pipeline, and the solenoid valve 230 is arranged at the The driving unit 420 moves the sampling needle 400 and contacts the liquid surface. When the sampling needle 400 contacts the liquid surface, the capacitance of the sampling needle 400 changes. The capacitance detection unit 410 detects the capacitance change, confirms that the sampling needle 400 has touched the liquid surface at this time, records the data of the driving unit 420, and transmits it to the control unit 240. When the control unit 240 determines that the height data is lower than the specified value, the control unit 240 controls the solenoid valve 230 and the liquid pump 200 to work, and the liquid pump 200 extracts the cleaning liquid from the liquid supply tank 100 and supplies it to the liquid reservoir 300, and the sampling needle 400 stays at the height of the specified value. When the liquid surface touches the sampling needle 400, the capacitance detection unit 410 detects the capacitance change and transmits the data to the control unit 240. The control unit 240 determines that the liquid reservoir 300 is full of cleaning liquid at this time, and the controller controls the solenoid valve 230 and the liquid pump 200 to close and stop supplying liquid.

[0027] In this embodiment, the control unit 240 is a single chip microcomputer.

[0028] In this embodiment, the driving unit 420 is a stepping motor or a servo motor.

[0029] In this embodiment, the capacitance detection unit 410 adopts a conventional voltage-method capacitance detection unit in the prior art. The working principle of the voltage-method capacitance detection unit is as follows: when the sampling needle does not touch the liquid surface, a voltage value V0 is obtained by voltage measurement. When the sampling needle moves toward the liquid surface, the capacitance detection unit continuously measures the voltage of the sampling needle and obtains a voltage value V1. When the sampling needle does not touch the liquid surface, the voltage value V1 is equal to the voltage value V0, indicating that the capacitance of the sampling needle has not changed at this time; when the sampling needle touches the liquid surface, the voltage value V1 is not equal to the voltage value V0, indicating that the capacitance of the sampling needle has changed at this time.

[0030] In a specific implementation, the driving unit 420 is a Shinano stepper motor, and the stepper motor model is STP-59D5058.

[0031] Embodiment 2

[0032] like Figure 1 As shown, the present application provides a centralized cleaning liquid supply system, including: a liquid level sensor 110 is also provided in the liquid supply tank 100, and the liquid level sensor 110 is connected to the control unit 240. The liquid level sensor 110 is used to detect the liquid level height of the liquid supply tank 100. When the liquid supply tank 100 is lower than a certain height, the liquid level sensor 110 will transmit data to the control unit 240, and the control unit 240 will directly alarm.

[0033] In a specific implementation, the liquid level sensor 110 is any one of an optical liquid level sensor, a capacitive liquid level sensor, a conductive liquid level sensor, a diaphragm liquid level sensor, a float liquid level sensor, and the like.

[0034] Embodiment 3

[0035] like Figure 1 As shown, the present application provides a centralized cleaning liquid supply system, including: a bubble sensor 210 is also provided between the liquid pump 200 and the liquid reservoir 300, and the bubble sensor 210 is connected to the control unit 240. When the liquid pump 200 cannot extract liquid from the liquid supply tank 100, the pipeline is empty, and the bubble sensor 210 detects it and sends it to the controller, and the control unit 240 can use the signal to issue an alarm.

[0036] In a specific implementation, the bubble sensor 210 is any one of an infrared bubble detection sensor, a capacitive bubble detection sensor, an ultrasonic bubble detection sensor, and the like.

[0037] Embodiment 4

[0038] like Figure 1 As shown, the present application provides a centralized cleaning liquid supply system, including: the liquid pump 200 supplies liquid to the bottom of the liquid reservoir 300 through a pipeline, so as to avoid the pipeline being set at a high place, and the liquid flowing out of the pipeline splashing bubbles, and the bubbles affecting the accuracy of the sampling needle 400 sucking liquid.

[0039] In a specific embodiment, the pipeline passes through the outer wall of the liquid reservoir 300 from the outside and extends to the bottom of the liquid reservoir 300, and the pipeline opening faces the bottom of the liquid reservoir 300.

[0040] In a specific embodiment, the pipeline is connected to the bottom of the liquid reservoir 300, and the cleaning liquid is directly supplied from the pipeline to the bottom of the liquid reservoir 300.

[0041] Embodiment 5

[0042] like Figure 1 As shown, the present application provides a centralized cleaning liquid supply system, including: the liquid pump 200 supplies liquid from the top of the liquid reservoir 300 through a pipeline to avoid opening holes on the side wall of the liquid reservoir 300 to cause leakage.

[0043] In a specific embodiment, the pipeline passes through the outer wall of the liquid reservoir 300 from the top of the liquid reservoir 300 and extends to the bottom of the liquid reservoir 300, and the pipeline opening faces the bottom of the liquid reservoir 300.

[0044] Embodiment 6

[0045] like Figure 1 As shown, the present application provides a centralized cleaning liquid supply system, comprising: there are multiple liquid reservoirs 300, because the solenoid valves 230 control the multiple liquid reservoirs 300 one by one, when the cleaning liquid in one of the liquid reservoirs 300 is lower than the specified value, the liquid pump 200 starts to supply liquid, the solenoid valve 230 corresponding to the liquid reservoir 300 opens, and the other solenoid valves 230 remain closed, so that the specified liquid reservoir 300 can be supplied independently.

[0046] In a specific embodiment, a liquid supply tank 100 is provided to store cleaning liquid, and a liquid pump draws cleaning liquid from the liquid supply tank and supplies it to each liquid reservoir 300 through a pipeline. A plurality of solenoid valves 230 are respectively provided in the pipeline between the liquid pump 200 and the liquid reservoir 300. The solenoid valve 230 directly controls the opening and closing of the pipeline. When the liquid level measurement module detects that the liquid level in the liquid reservoir 300 is lower than a specified minimum value, the control unit 230 controls the solenoid valve 230 corresponding to the liquid reservoir 300 to open, and other solenoid valves 230 remain closed. The control unit also starts the liquid pump 200 to extract liquid. When the liquid level measurement module detects that the liquid level in the liquid reservoir 300 reaches a specified height, the control unit first closes the liquid pump 200, and then the control unit closes the solenoid valve 230.

[0047] Embodiment 7

[0048] like Figure 1 As shown, the present application provides a centralized cleaning liquid supply system, including: the liquid reservoir 300 has a volume less than 100 ml, which can reduce the impact of impurities on the cleaning liquid, reduce the occupied sample needle working space, and improve the internal space utilization of the analyzer system.

[0049] It should be understood that if the diameter of the reservoir bottle mouth is small and other liquid level sensors cannot be placed in it, but the volume is greater than 100 ml, the centralized cleaning liquid supply system provided in this application is also applicable.

[0050] Embodiment 8

[0051] like Figure 1 As shown, the present application provides a centralized supply system for cleaning liquid, including: a bubble eliminator 220 is also provided between the liquid pump 200 and the solenoid valve 230, and the bubble eliminator is used to remove bubbles in the liquid. The bubble eliminator has a conical inner cavity, and is provided with a liquid inlet pipe, a liquid outlet pipe and an exhaust duct. The liquid inlet pipe is tangentially connected to the large end of the conical inner cavity, and the liquid outlet pipe is connected to the small end of the conical inner cavity. The inlet of the exhaust pipe is located on the inner side of the top of the cone in the cavity, and the outlet of the exhaust pipe is connected to the atmosphere. When the pressurized liquid is input tangentially, it rotates and flows in the conical cavity, and centrifugal separation occurs between the gas and the liquid. The gas gathers toward the center and causes an axial gas pressure difference as the liquid flow rate increases, so that the gas flows toward the top of the cone and is discharged from the exhaust duct to achieve rapid degassing.

[0052] Embodiment 9

[0053] like Figure 1 As shown, a centralized cleaning liquid supply system provided in the present application includes: the pipeline opening of the liquid supply tank 100 is set at the bottom, which can preferentially absorb the cleaning liquid at the bottom to avoid impurities from settling at the bottom, so that the cleaning liquid in the liquid supply tank 100 will not be stratified.

[0054] Embodiment 10

[0055] The present application provides an analyzer, comprising a centralized cleaning liquid supply system as described in the above specific implementation manner.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A centralized cleaning liquid supply system, characterized in that: include: Liquid reservoir, liquid supply tank, liquid level measurement module and centralized liquid supply module; The liquid level measurement module includes a sampling needle, a driving unit and a capacitance detection unit, wherein the sampling needle is hollow inside and connected to the capacitance detection unit, the driving unit enables the sampling needle to move in a vertical direction at the entrance of the liquid reservoir, and the capacitance detection unit is used to detect the capacitance change when the sampling needle contacts the liquid; The centralized liquid supply module includes a liquid pump, a solenoid valve and a control unit. The control unit is connected to the capacitance detection unit and the solenoid valve. The liquid pump is connected to the liquid supply tank through a pipeline. The liquid pump supplies liquid to the liquid reservoir through a pipeline. The solenoid valve is arranged between the liquid pump and the liquid reservoir.

2. The centralized cleaning liquid supply system according to claim 1, characterized in that: A liquid level sensor is also provided in the liquid supply tank, and the liquid level sensor is connected to the control unit.

3. The centralized cleaning liquid supply system according to claim 1, characterized in that: A bubble sensor is also provided between the liquid pump and the liquid reservoir, and the bubble sensor is connected to the control unit.

4. The centralized cleaning liquid supply system according to claim 1, characterized in that: The liquid pump supplies liquid to the bottom of the liquid reservoir through a pipeline.

5. The centralized cleaning liquid supply system according to claim 1, characterized in that: The liquid pump supplies liquid from the top of the liquid reservoir through a pipeline.

6. The centralized cleaning liquid supply system according to claim 1, characterized in that: The number of the liquid reservoirs is multiple.

7. The centralized cleaning liquid supply system according to claim 1, characterized in that: The volume of the liquid reservoir is less than 100 ml.

8. The centralized cleaning liquid supply system according to claim 1, characterized in that: A bubble eliminator is also provided between the liquid pump and the electromagnetic valve.

9. The centralized cleaning liquid supply system according to claim 1, characterized in that: The liquid supply pool pipeline opening is arranged at the bottom.

10. An analyzer, characterized in that: A centralized cleaning liquid supply system comprising the cleaning liquid centralized supply system according to any one of claims 1 to 9.

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