Time-temperature indicating device

Abstract

The invention discloses a time-temperature indicating device. The time-temperature indicating device comprises a starting part, a phase-change material, a movable medium, an activating display part and a time display part; the phase-change material is under a phase-change temperature and can enter the liquid state in case that the local environmental temperature is more than the phase-change temperature and enters the solid state in case that the local environmental temperature is less than the phase-change temperature; the starting part is used for pushing the phase-change material under the liquid state to move through an external force; when the phase-change material moves to reach a visual position on the activating display part and the environmental temperature is less than the phase-change temperature, the phase-change material is cured at the visual position on the activating display part and reminds of activating; the time display part is used for reminding of the deterioration time length of an article to be detected when the cured phase-change material enters the liquid state and moves along the movable medium. By adopting the time-temperature indicating device, the time that the environmental temperature of a cold chain system exceeds the upper critical temperature of the article to be detected can be monitored in the whole process, so as to remind a user of detecting whether the article to be detected deteriorates.

Description

technical field [0001] The invention relates to a time and temperature indicating device, in particular to a time and temperature indicating device for the ambient temperature exceeding the upper critical temperature. Background technique [0002] As we all know, blood, vaccines, meat and other items to be inspected need to be stored in a specific temperature environment. If the storage environment temperature exceeds the upper critical temperature specified for the items to be inspected, the items to be inspected will quickly deteriorate. After the items are checked, it will cause damage to the human body, and even cause death in severe cases. Therefore, it is necessary to accurately record the time when the ambient temperature exceeds the upper critical temperature to determine whether the stored items to be inspected are invalid. However, the time and temperature indicating device provided by the existing technology can only monitor the lower critical temperature, but ca...

AI Technical Summary

Problems solved by technology

However, the time and temperature indicating device provided by the existing technology can only monitor the lower critical temperature, but cannot monitor the upper critical temperature. As we all know, the probability of temperature rise caused by the failure of the refrigeration equipment to stop refrigeration is much higher than that of the equipment. The probability of temperature reduction due to failure, therefore, it is necessary to develop a time temperature indicating device for the ambient temperature has exceeded the upper critical temperature

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