Application of Micro Diaphragm Pumps in the Fluid Path Systems of IVD Instruments

Micro Diaphragm Pump, also known as control pump, is a main type of actuator, which changes the fluid flow through the power operation by receiving the control signal output from the regulating control unit. To achieve the regulation and control of a process parameter such as temperature, pressure, flow, liquid level, etc., a micro diaphragm pump is indispensable.

Features of the Micro Diaphragm Pump

1. The micro diaphragm pump uses air as power, so the flow rate automatically adjusts with changes in back pressure (outlet resistance), suitable for fluids with medium to high viscosity.
2. Due to the low shear force of the diaphragm pump,the micro diaphragm pump can be used for conveying fluids with relatively unstable chemical properties, as well as fiber-containing liquids like fruit juices.
3. The micro diaphragm pump can handle particles and has a flow rate that can be adjusted, automatically stopping until unblocked when there's a pipeline blockage.
4. The diaphragm pump is small, easy to move, and simple and economical to install.
5. In the handling of hazardous and corrosive materials, the diaphragm pump can completely isolate the material from the outside, providing good sealing.

Micro Diaphragm Pumpis the power component of IVD instruments

IVD belongs to a type of medical device, which refers to the detection of clinical diagnostic information on human samples (blood, body fluids, tissues, etc.) through related instruments outside the human body, thereby judging diseases or body functions. Currently, about 80% of disease diagnoses rely on in vitro diagnostics, hence it's called "the doctor's eye".

In IVD instruments,the micro diaphragm pump is an important power part of in vitro diagnostic analysis, being the power component of the liquid system, widely used in many fields such as clinical chemistry, blood analysis, immunology, and microbiology to complete important functions like sample transport, waste liquid removal, and cleaning of pipelines and components.

1. IVD In Vitro Diagnostics Schematic

2. Main Steps of Liquid Path Processing

(1) Sample Injection and Reagent Distribution Step: these two steps involve adding samples and reagents into the analysis chamber with high precision. The flow pressure parameters are not high, but the injection system has characteristics like high precision, long life, no pollution, and high reliability, so the flow precision requirements formicro diaphragm pumps are very high.

(2) Pipeline Cleaning Step: this step first needs to disinfect the pipelines and needles through disinfectant, then rinse residues using a water pump. Corrosive solvents are often used when cleaning pipelines and needles, and it is necessary to promptly discharge waste fluids containing crystals or blood clots from the system. To ensure cleaning effectiveness, the water pump is required to have certain corrosion resistance and be able to continuously output high-pressure and high-flow water streams.

(3) Waste Liquid Cleaning Step: this step involves cleaning and removing the waste liquid from the reaction cups and pipelines. This step usesa micro diaphragm pump to directly draw and discharge waste liquid, which can simplify the gas path; or use a micro vacuum pump to vacuum the sealed container, indirectly extracting the waste liquid inside the instrument, improving efficiency, and the waste liquid does not pass through the pump chamber, thus extending the pump's service life.

As a specialized enterprise in the fluid control field, Kentuo has provided high-quality supply services to its customers in multiple systems such as pre-processing units, analysis and detection units, and post-processing units in the in vitro diagnostic industry, and has formed in-depth cooperation with several leading companies in the in vitro diagnostics field. If you have any needs formicro diaphragm pumps, please feel free to contact us.