How the lotion pump works?

Update:31 May 2019
Summary:

The lotion pump is also generally called a hand sanitiz […]

The lotion pump is also generally called a hand sanitizer pressure pump. It can be used almost everywhere in life, like cosmetics, skin care products, detergents, detergents, and many more. When using, we first press the air in the liquid storage chamber (that is, the plastic tube that can wash the hair water). When the air is exhausted, press the pump head again. After the loose hand, the spring in the pump head. To restore the original state, a vacuum will be formed in the liquid storage chamber to generate a negative pressure. At this time, the pressure in the container is consistent with the atmospheric pressure, and then the pressure in the liquid storage chamber is small and the pressure inside the container is large. Due to the pressure difference, the atmosphere will press the liquid around the reservoir cavity into the reservoir, giving the impression that the pump head sucks up the liquid.
The specific principle is as follows: 1. First press-------- When we press the head (ACTUATOR) for the first time, push the sub-column (SUB-STEM) together with the main column (STEM) to compress the spring (SPRING) During the compression spring, the outer wall of the piston (PTSTON) rubs against the inner wall of the body to urge the piston to open the discharge hole of the sub-column (SUB-STEM); when the piston (PTSTON) slides down, the body ( HOUSING) The air in the HOUSING) is discharged through the secondary sub-column (SUB-STEM) discharge hole; 2. Reciprocating multiple presses ------- all the air in the body (HOUSING) is discharged; 3. Aspirate - ------ After pressing the head (ACTUATOR) through the main column (STEM), the sub-column (SUB-STEM), the piston (PTSTON), the common compression spring (SPRING) to discharge the air inside the body (HOUSING) , release the actuator (ACTUATOR), the spring (SPRING) moves back (upward) due to the loss of pressure. At this time, the piston (PISTON) also moves downward through the inner wall of the friction body (HOUSING), and the sub-column (SUB-STEM) The discharge hole is closed; at this time, the liquid storage chamber in the body (HOUSING) forms a vacuum suction state, and the glass ball (BALL) On a suction, bottle of liquid through the straw (DIPTUBE) liquid into the reservoir chamber body (HORSING). 4. Storage of liquid ------ Press the head several times, and store the liquid to the body by multiple aspirations until the liquid is full. 5. Discharge----------- When the liquid in the HOUSING reservoir is full, press the ACTUATOR again and the liquid passes through the discharge hole directly from the nozzle (ACTUATOR). ejection.