Meter assembly, sheath fluid impedance meter and flow cytometer

Abstract

The invention discloses a meter assembly, a sheath fluid impedance meter and a flow cytometer. The meter assembly comprises a meter, a waste fluid isolation chamber, a back sheath isolation chamber and a pressure balance pipeline, wherein the meter is provided with a front pool, a back pool, a back sheath inlet and a waste fluid outlet; the front pool and the back pool are communicated through a metering hole; both the back sheath inlet and the waste fluid outlet are communicated with the back pool; the back sheath isolation chamber is connected with the back sheath inlet; the waste fluid isolation chamber is connected with the waste fluid outlet; the back sheath isolation chamber is connected with the ambient atmosphere through a gas pipeline; the pressure balance pipeline is connected with the back sheath isolation chamber and the waste fluid isolation chamber; and the pressure balance pipeline is provided with a pressure balance controller for controlling the opening / closing state of the pressure balance pipeline. In the cleaning and metering process, the closed chamber is arranged above the liquid level of the back sheath isolation chamber, thereby enhancing the stability of the liquid level.

Description

technical field [0001] The invention relates to a sheath current impedance counting device. Background technique [0002] Sheath flow impedance counting is a technology commonly used in blood analyzers, and the structure of the key component counter is as follows figure 1 and figure 2 shown, where figure 1 is the vertical section of the counter, figure 2 A horizontal section view of the counter. The counter includes a front cell housing 1 , a cathode 2 , a sample needle 3 , a separator 4 , a sample needle base 5 , a rear cell housing 6 , a capture tube 7 and an anode 8 . The forebay housing 1 forms a forebay 17 , and the forebay housing 1 is also provided with a front sheath inlet 9 , a sample liquid inlet 10 and a forebay cleaning inlet 11 all connected to the forebay 17 . The rear pool housing 6 forms a rear pool 18 , and the rear pool housing 6 is opened with a rear sheath inlet 13 passing through the rear pool 18 . The capture pipe 7 is fixed inside the rear tank...

AI Technical Summary

Problems solved by technology

[0007] In this way, there is a problem: on the one hand, the rear sheath should not be actually connected to the front sheath; It enters in the way of dripping, and the outlet also flows out in the way of dripping

The first problem is the liquid level initialization problem, that is, how to ensure that the liquid level is within an acceptable range when the counter is working

The second problem is: due to changes in pressure and temperature, and the impact of droplet dripping, gas will inevitably overflow or dissolve from the liquid, which will cause changes in the liquid level, which may lead to loss of the liquid level during long-term continuous work. control

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