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Is there a micro air pump that can directly adjust the negative pressure?
The micro air pump can directly adjust the negative pressure. You can look at the ANB series intelligent vacuum pump produced by Chengdu Xinweicheng Technology.

trait

(1) can adjust the vacuum required in actual work, and can set and display the vacuum (negative pressure) value at that time in real time through the integrated digital LCD panel;

(2) adjustable flow;

(3) Equipped with high-sensitivity imported sensor, high-quality flow regulating valve and precision control circuit to complete the "automatic regulation" function, which greatly saves the time and energy of developers;

(4) Built-in miniature vacuum pump, low interference and long service life; With the special silencing system and independent damping system of micro air pump, the intelligent vacuum pump can work reliably for a long time with low noise;

(5) The core component is the micro vacuum pump, so it inherits the advantages of the micro vacuum pump, is oil-free and pollution-free, and can run continuously for 24 hours. It is a veritable dry vacuum pump, which does not need maintenance, lubricating oil and vacuum pump oil; Back of intelligent vacuum pump

(6) AC 220V power supply, plug and play.

Detailed introduction and examples

This intelligent vacuum pump automatically adjusts the vacuum degree and flow rate through three unique working modes: interval, timing and limit:

1. Intermittent working mode

You can set the upper and lower limits of the required vacuum. The pump will stop automatically when it reaches the upper limit, and start automatically when the vacuum drops to the lower limit.

Application scope: vacuum pressure maintenance of closed containers, etc.

Example: If an ANB2005 intelligent vacuum pump (its maximum negative pressure is -80kPa) is used to "vacuum maintain pressure" on the closed container, so that the internal negative pressure is always maintained at about -60kPa, the upper limit can be set to -55kPa and the lower limit can be set to -65kPa, and when the negative pressure in the container reaches the upper limit, the pump will automatically stop working; Then, as the leakage negative pressure of the closed container itself drops below the lower limit, the pump will automatically start again, so as to maintain the negative pressure in the container at about -60kPa, thus achieving the purpose of maintaining the vacuum pressure.

2. Timed working mode

The working time of the pump can be set, and the pump will automatically stop running after the set time. The maximum allowable duration is 99 hours and 59 minutes, and the minimum duration is 1 minute.

Scope of application: vacuumizing time can be controlled (stop at fixed time)

Example: To make the negative pressure in the closed container reach -80KPA, use intelligent vacuum pump ANB2005 (its maximum negative pressure is -80kPa[2]) to vacuum the container. If the container is small, such as 1-2L, it can be set for several minutes. On the other hand, you need to set a longer time. When the time is up, ANB2005 will stop automatically.

3. Extreme working mode

You can set the upper limit of vacuum degree. When this vacuum degree is reached, the pump will stop automatically.

Application example: setting vacuum valve value and automatic shutdown (quantitative constant negative pressure shutdown)

For example, suppose that in an experiment, when the negative pressure in the container reaches -70KPA, the experimental effect is the best. The upper limit of ANB2005 can be set to -70KPA, and the intelligent vacuum pump will automatically stop when it reaches -70KPA, thus achieving the goal.