Disclosure of utility model
The embodiment of the utility model provides a concentrated cleaning liquid supply system, which aims to solve the problems of liquid level detection and automatic liquid supply of a small-capacity liquid reservoir in the prior art.
The embodiment of the utility model also provides a concentrated cleaning liquid supply system which comprises a liquid storage device, a liquid supply tank, a liquid level measuring module and a concentrated liquid supply module, wherein the liquid level measuring module comprises a sampling needle, a driving unit and a capacitance detection unit, the sampling needle is hollow, the sampling needle is connected with the capacitance detection unit, the driving unit enables the sampling needle to move in the vertical direction at an inlet of the liquid storage device, the capacitance detection unit is used for detecting capacitance change when the sampling needle is in contact with liquid, the concentrated liquid supply module comprises a liquid pump, an electromagnetic valve and a control unit, the control unit is connected with the capacitance detection unit and the electromagnetic valve, the liquid pump is connected to the liquid supply tank through a pipeline, the liquid pump supplies liquid into the liquid storage device through the pipeline, and the electromagnetic valve is arranged between the liquid pump and the liquid storage device.
In some embodiments, a liquid level sensor is further disposed in the liquid supply tank, and the liquid level sensor is connected to the control unit.
In some embodiments, a bubble sensor is further provided between the liquid pump and the reservoir connection, the bubble sensor being connected to the control unit.
In some embodiments, the liquid pump supplies liquid to the bottom inside the reservoir through a conduit.
In some embodiments, the liquid pump supplies liquid from the top of the reservoir through a conduit.
In some embodiments, the reservoir is a plurality of reservoirs.
In some embodiments, the reservoir volume is less than 100 milliliters.
In some embodiments, a bubble eliminator is also provided between the liquid pump and the solenoid valve.
In some embodiments, the liquid supply tank conduit opening is provided at the bottom.
The embodiment of the utility model also provides an analyzer, which comprises the concentrated cleaning liquid supply system of any embodiment.
The liquid level detection device has the advantages that the sampling needle is driven by the driving unit to move along the vertical direction at the inlet of the liquid storage device, so that a stroke signal of the sampling needle can be obtained, and because the sampling needle is connected with the capacitance detection unit, a capacitance change signal when the sampling needle contacts the intensified cleaning liquid can be obtained, the control unit can detect the liquid level position by utilizing the stroke signal of the driving unit and the capacitance change signal of the capacitance detection unit, and the electromagnetic valve and the liquid pump in the centralized liquid supply module are controlled to automatically supply liquid according to the page position detection result. Because the diameter of the sampling needle is small, the sampling needle can be directly inserted into the small-capacity liquid reservoir, the problem of liquid level detection of the small-capacity liquid reservoir can be solved, and the volume of the liquid reservoir is not increased.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. Furthermore, it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "left," "right," "horizontal," "top," "bottom," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, or communicable with each other, directly connected, indirectly connected via an intermediary, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize applications of other processes and/or usage scenarios for other materials.
Example 1
As shown in fig. 1, the concentrated supply system of cleaning liquid provided by the application comprises a liquid reservoir 300, a liquid supply tank 100, a liquid level measuring module and a concentrated liquid supply module; the liquid level measurement module comprises a sampling needle 400, a driving unit 420 and a capacitance detection unit 410, wherein the sampling needle 400 is hollow, the sampling needle 400 is connected with the capacitance detection unit 410, the driving unit 420 enables the sampling needle 400 to move along the vertical direction at the inlet of the liquid storage device, and the capacitance detection unit 410 is used for detecting capacitance change when the sampling needle 400 is contacted with liquid; the centralized liquid supply module comprises a liquid pump 200, an electromagnetic valve 230 and a control unit 240, wherein the control unit 240 is connected with the capacitance detection unit 410 and the electromagnetic 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 storage tank 300 through a pipeline, the electromagnetic valve 230 is arranged between the liquid pump 200 and the liquid storage tank 300, the driving unit 420 enables the sampling needle 400 to move and contact with the liquid level, when the sampling needle 400 contacts the liquid level, the sampling needle 400 generates capacitance change, the capacitance detection unit 410 detects the capacitance change, confirms that the sampling needle 400 has contacted the liquid level at the moment, records data of the driving unit 420 and transmits the data to the control unit 240, when the control unit 240 judges that the height data is lower than a specified value, the control unit 240 controls the electromagnetic valve 230 and the liquid pump 200 to operate, the liquid pump 200 pumps and supplies the cleaning liquid to the liquid storage tank 300 from the liquid supply tank 100, when the liquid level of the liquid is at the specified value contacts the sampling needle 400, when the liquid level of the liquid contacts the sampling needle 400, the capacitance detection unit 410 detects the capacitance change and transmits the capacitance change to the control unit 240, the control unit 240 judges that the cleaning liquid is full, the controller controls the solenoid valve 230 and the liquid pump 200 to close to stop the supply of liquid.
In this embodiment, the control unit 240 is a single-chip microcomputer.
In the present embodiment, the driving unit 420 is a stepping motor or a servo motor.
In this embodiment, the capacitance detecting unit 410 is a capacitance detecting unit using a voltage method, which is conventional in the art. The working principle of the voltage method capacitance detection unit is that when the sampling needle does not contact the liquid level, voltage measurement is carried out to obtain a voltage value V0, and when the sampling needle moves towards the liquid level, the capacitance detection unit always carries out voltage measurement on the sampling needle to obtain a voltage value V1, when the sampling needle does not contact the liquid level, the voltage value V1 is equal to the voltage value V0, which indicates that the capacitance of the sampling needle is not changed at the moment, and when the sampling needle contacts the liquid level, the voltage value V1 is not equal to the voltage value V0, which indicates that the capacitance of the sampling needle is changed at the moment.
In a specific embodiment, the drive unit 420 is a signal strength stepper motor, which is STP-59D5058.
Example two
As shown in fig. 1, the concentrated supply system for cleaning solution provided by the application comprises a liquid level sensor 110 arranged in the liquid supply tank 100, wherein the liquid level sensor 110 is connected with the control unit 240, the liquid level sensor 110 is used for detecting the liquid level of the liquid supply tank 100, when the liquid supply tank 100 is lower than a certain height, the liquid level sensor 110 transmits data to the control unit 240, and the control unit 240 can directly give an alarm.
In a specific embodiment, 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, and a float liquid level sensor.
Example III
As shown in fig. 1, the concentrated supply system for cleaning solution provided by the application comprises a bubble sensor 210 arranged between the liquid pump 200 and the liquid reservoir 300, wherein the bubble sensor 210 is connected with the control unit 240, when the liquid pump 200 cannot pump liquid from the liquid supply tank 100, the pipeline is empty, the bubble sensor 210 detects the liquid and sends the detected liquid to the controller, and the control unit 240 can use the signal to give an alarm.
In a specific embodiment, the bubble sensor 210 is any one of an infrared bubble detection sensor, a capacitive bubble detection sensor, and an ultrasonic bubble detection sensor.
Example IV
As shown in fig. 1, the concentrated supply system for cleaning solution provided by the present application includes the liquid pump 200 supplying liquid to the bottom of the reservoir 300 through a pipe, avoiding the pipe being disposed at a high position, and the liquid flowing out of the pipe splashes bubbles, which affect the accuracy of the liquid sucking by the sampling needle 400.
In a specific embodiment, the tubing extends from the outside through the outer wall of the reservoir 300 and to the bottom of the reservoir 300, with the tubing opening toward the bottom of the reservoir 300.
In a specific embodiment, the conduit communicates with the bottom of the reservoir 300, and the cleaning fluid is supplied directly from the conduit to the bottom of the reservoir 300.
Example five
As shown in fig. 1, the concentrated supply system for cleaning solution provided by the application comprises a liquid pump 200 for supplying liquid from the top of a liquid storage 300 through a pipeline, so as to avoid the situation of liquid leakage caused by opening holes in the side wall of the liquid storage 300.
In a specific embodiment, the tubing extends from the top of the reservoir 300 through the outer wall of the reservoir 300 and to the bottom of the reservoir 300, with the tubing opening toward the bottom of the reservoir 300.
Example six
As shown in fig. 1, the concentrated supply system for cleaning solution provided by the application comprises a plurality of liquid reservoirs 300, wherein the plurality of liquid reservoirs 300 are controlled by the electromagnetic valves 230 in a one-to-one correspondence manner, when the cleaning solution in one liquid reservoir 300 is lower than a specified value, the liquid pump 200 starts to supply the liquid, the electromagnetic valve 230 corresponding to the liquid reservoir 300 is opened, and the other electromagnetic valves 230 are kept closed, so that the specified liquid reservoirs 300 can be independently supplied.
In a specific embodiment, a liquid supply tank 100 is provided to store cleaning liquid, a liquid pump extracts the cleaning liquid from the liquid supply tank and supplies the cleaning liquid to each liquid storage tank 300 through a pipeline, a plurality of electromagnetic valves 230 are respectively arranged in the pipeline between the liquid pump 200 and the liquid storage tanks 300, the electromagnetic valves 230 directly control the opening and closing of the pipeline, when the liquid level measuring module detects that the liquid level in the liquid storage tanks 300 is lower than a specified minimum value, the control unit 230 controls the electromagnetic valves 230 corresponding to the liquid storage tanks 300 to be opened, other electromagnetic valves 230 keep the closed state, the control unit also starts the liquid pump 200 to extract the liquid, and when the liquid level measuring module detects that the liquid level in the liquid storage tanks 300 reaches the specified height, the control unit closes the liquid pump 200 first, and then the control unit closes the electromagnetic valves 230.
Example seven
As shown in FIG. 1, the concentrated supply system of the cleaning liquid provided by the application comprises the liquid storage 300 with the volume smaller than 100 milliliters, so that the influence of impurities on the cleaning liquid can be reduced, the occupied working space of a sample needle is reduced, and the utilization rate of the internal space of an analyzer system is improved.
It should be understood that if the diameter of the bottle mouth of the liquid storage device is smaller, other liquid level sensors cannot be placed in the bottle mouth, but when the volume is larger than 100 milliliters, the concentrated supply system of the cleaning liquid provided by the application is also applicable.
Example eight
As shown in fig. 1, the concentrated supply system of cleaning liquid according to the present application further includes a bubble eliminator 220 disposed between the liquid pump 200 and the solenoid valve 230, for eliminating bubbles present in the liquid. The bubble eliminator is provided with a conical inner cavity and is provided with a liquid inlet pipe, a liquid outlet pipe and an exhaust pipe, wherein the liquid inlet pipe is tangentially connected with the large end of the conical inner cavity, the small end of the conical inner cavity of the liquid outlet pipe is connected, the inlet of the exhaust pipe is positioned at the inner side of the conical top end in the cavity, and the outlet of the exhaust pipe is communicated with the atmosphere. When the pressurized liquid is tangentially input, namely, flows in a conical cavity in a rotating way, centrifugal separation occurs between gas and liquid, gas gathers towards the center and causes axial gas pressure difference along with the increase of the flow rate of the liquid, so that the gas flows towards the cone top and is discharged from an exhaust duct, and rapid degassing is realized.
Example nine
As shown in FIG. 1, the concentrated supply system of cleaning liquid provided by the application comprises a liquid supply tank 100, wherein a pipeline opening is arranged at the bottom, so that the bottom cleaning liquid can be preferentially sucked, impurities are prevented from depositing at the bottom, and the cleaning liquid in the liquid supply tank 100 can not be layered.
Examples ten
The application provides an analyzer, which comprises the concentrated cleaning liquid supply system in the specific embodiment.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.