Defrosting system of evaporator of low-temperature storeroom for ship

Abstract

The invention relates to a defrosting system of an evaporator of a low-temperature storeroom for a ship, which comprises the evaporator, a water collecting plate (1) and a down pipe (2). The water collecting plate (1) is arranged at the bottom of the evaporator, the down pipe (2) is mounted at the bottom of the water collecting plate (1), the evaporator consists of six groups of defrosting heating pipes (6), each group of defrosting heating pipes (6) comprises two defrosting heating pipes which are connected in parallel, the six groups of defrosting heating pipes (6) are in star joint, two U-shaped electric heating pipes (3) are disposed in the water collecting plate (1), a heating wire (4) is uniformly wound on the outer wall of the down pipe (2), and a heat-insulation pipe (5) is disposed on the outer side of the heating wire (4). The defrosting system of the evaporator of the low-temperature storeroom for the ship has the advantages that defrosting failure rate of the evaporator is reduced, running reliability of equipment is improved, replacement frequency of the heating pipes is reduced, maintenance cost is saved, and labor intensity of staff is greatly reduced.

Description

technical field [0001] The invention relates to a defrosting system for an evaporator of a marine low-temperature storage. Background technique [0002] Ocean-going ships have a long voyage and a long cycle, and the requirements for the living security of the crew are gradually increasing. Existing ships are basically replenished once per voyage, and food preservation, especially meat preservation, relies on refrigeration in low-temperature storage. The quality of the cooling effect of the low-temperature storage directly affects the storage time of the supplies, and also determines the maximum sailing time to a certain extent. [0003] The defrosting effect of the evaporator directly affects the cooling effect of the low-temperature storage. Serious frosting problems can easily cause the evaporator fan to stall, which will lead to serious consequences of overloading and burning the fan motor. Taking an ocean-going ship as an example, the evaporator of the ship’s low-tempe...

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Problems solved by technology

[0006] The electric heating tube of the evaporator is very easy to burn out, and since the electric heating tube of the evaporator is composed of two heating tubes in series (the rated voltage of the heating tube is 110V), once one of them burns out, the other one is in good condition, but because A break in the line will not work either, so the frost on the evaporator body will not melt

[0007] (2) The water collecting pan is frozen

[0008] Although there is the same electric heating wire inside the water collecting pan as in the downpipe, the power is very small, the quality is poor, and failures often occur. Since the temperature of the low-temperature storage is as low as -18°C, when the evaporator defrosts, it enters the water collecting The water in the pan will re-freeze before it can be drained, so it cannot flow through the downpipe normally

[0009] (3) Downspout ice blockage

[0010] Since the downpipe electric heating wire is always in a continuous working state, and its quality is poor, the failure rate of the downpipe electric heating wire is very high

In addition, due to the long length of the original downpipe, once the electric heating wire fails, the water entering the downpipe will freeze before it flows out in a low-temperature environment. In the end, it will also lead to the failure of normal defrosting.

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