A sterile spray pump

Abstract

The invention provides an aseptic spray pump, which includes a main piston, a nozzle, and an auxiliary piston fixed in the nozzle. The auxiliary piston is mounted on the main piston so that it can move up and down, and a first compression space is formed between the auxiliary piston and the main piston. and the second compression space, the main piston has a main liquid suction chamber communicated with the inner cavity of the container, and an air supply port communicated with the main liquid suction chamber, the air supply port communicates with the second compression space, and the air supply port is fixed with a cover The filter element of the air supply port, the auxiliary piston has an auxiliary liquid suction chamber communicated with the main liquid suction chamber, a first exhaust member, and a second exhaust member; press down the spray head and the main piston is connected to the first exhaust member and the second exhaust member. After the exhaust component abuts, the first compression space communicates with the main liquid suction chamber through the first exhaust component, and the second compression space communicates with the outside of the aseptic spray pump through the second exhaust component. This application can normally replenish the external air into the container, so the sterile spray pump in this application is not affected by the filling capacity and the number of times of use.

Description

technical field [0001] The invention relates to the storage field of liquids (such as liquid medicine, liquid cosmetics, liquid cleaning agents, etc.), in particular to an aseptic spray pump for spraying liquid in a container. Background technique [0002] A spray pump is a pump that sprays a substance in a liquid state in a spray state when the user presses it. When the spray pump is used to spray liquid medicine, the spray pump usually has a sterile requirement. At present, there are various forms of spray pumps on the market, but they all have the following disadvantages: [0003] 1. Ordinary spray pumps mostly have an open nozzle structure. After use, the air directly contacts the liquid medicine at the nozzle, and the liquid medicine remains inside the nozzle. Residual liquid medicine is sprayed out again during use, directly influences use effect. [0004] 2. Ordinary spray pumps are designed with a return air structure, which is used to replenish the external air in...

AI Technical Summary

Problems solved by technology

[0003] 1. Ordinary spray pumps mostly have an open nozzle structure. After use, the air directly contacts the liquid medicine at the nozzle, and the liquid medicine remains inside the nozzle. The remaining medicinal liquid is sprayed out again during use, which directly affects the use effect

[0004] 2. Ordinary spray pumps are designed with a return air structure, which is used to replenish the external air into the container during the use of the spray pump, otherwise the spray pump cannot work normally, but the external air directly entering the container will affect the liquid medicine in the container. create pollution

[0005] 3. Most sterile spray pumps are in the form of vacuum pumps, and the volume of liquid medicine in the container installed with the vacuum pump should not exceed 2 / 3 of the container, and the container capacity is subject to certain restrictions. If the container capacity is too large, the internal negative pressure is too large, It will lead to unstable dose; at the same time, with the increase of the number of uses of the spray pump, the internal pressure of the container will continue to increase, resulting in the gradual attenuation of the spray dose of the spray pump, which will lead to the inability of all the liquid in the container to be used up.

Images