A thermoelectric refrigeration artificial formation freezer

Abstract

The invention relates to a thermoelectric refrigeration artificial formation freezer, which comprises an external protection device, an internal heat dissipation device and a solid-state refrigeration device arranged between the protection device and the heat dissipation device. The solid-state refrigeration device is a semiconductor refrigeration chip. The semiconductor refrigerating sheet has heat-absorbing and exothermic ends. The heat-absorbing end is attached to the protection device, and the exothermic end is attached to the heat sink. ; The semiconductor refrigeration chip controls its circuit, current magnitude and direction through the control unit. The freezer of the present invention refrigerates when it is powered on, and can directly freeze the ground without building a freezing station, which greatly reduces project costs and construction periods, reduces costs, and improves work efficiency; it can also realize segmental freezing, Directional freezing and forced thawing, saving refrigeration costs and shortening the construction period; using natural water circulation to cool down, there is no risk of leaking and polluting the environment.

Description

technical field [0001] The invention belongs to the field of underground engineering design, and in particular relates to a thermoelectric refrigeration artificial formation freezer. Background technique [0002] The artificial ground freezing method is to use artificial refrigeration to send low-temperature refrigerant into the water-bearing strata around the excavated body, so that the water in the stratum will be continuously frozen into ice in the temperature field below its freezing point, and the water in the stratum will be frozen. Soil particles are cemented with ice to form an impermeable overall structure, and the overall strength and elastic modulus of this frozen soil structure are much larger than those of non-frozen soil, which will freeze the strata around the excavated body into a closed continuum (frozen earth wall) to resist ground pressure and isolate the connection between groundwater and the excavated body, and then excavation and construction support ca...

AI Technical Summary

Problems solved by technology

[0005] 2. Excessive power required

Freezing projects based on negative temperature brine circulation need to convert electrical energy into mechanical energy, and mechanical energy into thermal energy. The conversion process is complicated and a lot of electrical energy is wasted in the middle.

[0006] 3. Leakage can easily cause pollution

During the freezing process, the freezing tube shrinks due to pre-cooling, forming shrinkage stress inside, and freezing outside, causing extrusion force, so the freezing tube is easy to break, resulting in salt water leakage, which not only affects the progress of the project, but also pollutes the formation

[0007] 4. High construction cost

Since the freezing station unit needs special maintenance, and the construction time is long, it consumes a lot of power.

[0008] Therefore, the existing freezing system engineering construction cost is too high

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