Injection container capable of relieving overpressure and valve assembly thereof

An injection container, comprising:

• a housing having therein an accommodation space for accommodating contents, and having an upper sealing cap for sealing an upper part of the accommodation space;
• a mounting cup mounted to the upper sealing cap, and having a through hole at a middle part thereof;
• a stem housing including a mounting portion having a hollow portion therein and mounted to the mounting cup, and a communication flow path for communicating the hollow portion with the accommodating space;
• a valve stem having one side which passes through the through hole, having another side arranged at the hollow portion so as to be slidable, and having an orifice selectively communicated with the hollow portion by the sliding;
• and
• a flow path blocking valve configured to block the communication flow path when an overpressure occurs,
• wherein the flow path blocking valve includes a melting portion arranged on a flow path connected to an inlet of the communication flow path in a solid state, and formed to melt at a temperature more than a preset level,
• wherein a moving path of the melting portion which has melted is formed between the flow path blocking valve and the communication flow path, such that the melting portion melts, moves, and is solidified to block at least a part of the communication flow path when an inner temperature of the accommodation space is increased to a level more than a preset temperature, and
• wherein the stem housing is further provided with a mounting portion arranged on a part of the communication flow path, in order to hinder a flow of the melted melting portion introduced into the communication flow path, for solidification of the melting portion, the mounting portion formed to block a region of the communication flow path where the melted melting portion passes.

A valve assembly mounted to a mounting cup fixed to an upper end of a housing, the valve assembly comprising:

• a stem housing including a mounting portion having a hollow portion therein and mounted to the mounting cup, and a communication flow path for communicating the hollow portion with the accommodating space;
• a valve stem having one side which passes through a central part of the mounting cup, having another side arranged at the hollow portion so as to be slidable, and having an orifice selectively communicated with the hollow portion by the sliding;
• and
• a flow path blocking valve configured to block an inlet of the communication flow path when an overpressure occurs,
• wherein the flow path blocking valve includes a melting portion arranged on a flow path connected to the inlet of the communication flow path in a solid state, and formed to melt at a temperature more than a preset level,
• wherein a moving path of the melting portion which has melted is formed between the flow path blocking valve and the communication flow path, such that the melting portion melts, moves, and is solidified to block at least a part of the communication flow path when an inner temperature of the accommodation space is increased to a level more than a preset temperature, and
• wherein the stem housing is further provided with a mounting portion arranged on a part of the communication flow path, in order to hinder a flow of the melted melting portion introduced into the communication flow path, for solidification of the melting portion, the mounting portion formed to block a region of the communication flow path where the melted melting portion passes.