Storage box based on phase change materials and control system thereof

Abstract

The invention discloses a storage box based on phase change materials, and relates to the technical field of storage boxes. The storage box comprises a box body, a phase change module, an evaporator,an air duct and a compressor; the compressor is installed at the bottom of the box body; the compressor is in communication with the evaporator through a condenser; the evaporator is located in an evaporation cavity; a ring temperature sensor is installed in the evaporation cavity; the evaporation cavity is in communication with the air duct; an air cooling fan is installed at the communication position between the air duct and a storage chamber; and the phase change module comprises a phase change material bag, a water supplementing bag and an acid supplementing bag. The invention further provides a control system of the storage box based on the phase change material. According to the storage box, the total refrigeration demand quantity is comprehensively estimated according to the environment temperature and the refrigerator volume and the residual latent heat quantity is judged according to the tension of the phase change material bag through a phase change control panel, then the opening and closing of a first electromagnetic valve and a second electromagnetic valve are controlled to supplement water and acrylic acid solution in the phase change material bag, the storage box iskept in a low-temperature state in the defrosting process, the storage effect of the refrigerator is improved, and the utilization rate of the phase change material is improved.

Description

technical field [0001] The invention belongs to the technical field of storage boxes, and in particular relates to a storage box based on a phase change material and a control system thereof. Background technique [0002] Conventional air-cooled storage tanks generally have a temperature above 0°C. Due to restrictions such as refrigerants, the temperature of air-cooled storage tanks is often as low as -20°C to -30°C. When the temperature in the air-cooled storage box is lower than 0°C, if the air-cooled cycle is still used, defrosting must be involved, and the principle of defrosting is generally to increase the internal temperature of the storage box, so that the temperature rises above 0°C, so as to achieve Natural defrosting purpose. During the defrosting and cooling process of the air-cooled storage box, the temperature of the storage space inside the box tends to rise significantly, resulting in the safety of the stored items not being guaranteed. Some storage boxes u...

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Problems solved by technology

[0004] The object of the present invention is to provide a storage box based on phase change materials, through which the phase change material bags fixed in the U-shaped frame at the bottom of the evaporation chamber are respectively connected to the phase change material bag and the acid supplement bag through conduits, and the environmental temperature sensor is real-time Monitoring the ambient temperature and pressure sensor to monitor the tension of the phase change material bag in real time, and the phase change control board comprehensively estimates the total cooling demand according to the ambient temperature refrigerator volume and the tension of the phase change material bag to judge the remaining latent heat, and then controls the first solenoid valve , The switch of the second solenoid valve replenishes water and acrylic acid solution in the phase change material belt, which solves the problem that the existing air-cooled storage box cannot maintain the low temperature state in the storage box well during the defrosting process and cannot control the desired change material in real time, resulting in parallel The problem of temperature rise in the freezer

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