RU1768894C - Method of removing ice layer from refrigerator surfaces - Google Patents

Abstract

Usage: in the field of refrigeration equipment and where it is required to clean from frost, ice, growth. SUMMARY OF THE INVENTION: The ice layer formed is exposed to a directed stream of compressed gas at a temperature below the temperature of the ice that ice particles are introduced into before entering. 1 ill.

Description

The invention relates mainly to the field of refrigeration technology and can be used in any field of the national economy where refrigeration machines, chambers, units are used and cleaning from frost, ice, and growth is required.

A technical solution is known (see UK application 2022807 G25D21 / 06) for freezing freezing chambers. It consists in supplying a combustible vaporous refrigerant to heat-exchanging surfaces coated with frost. The disadvantages of this solution are violation of the temperature regime of the stored objects, energy consumption, including the restoration of the temperature regime, spraying drops of liquid with their subsequent freezing on various cold elements.

A technical solution is known (see US patent No. 4570447 G25V 21/00). It consists in removing the layer of frost from the coils of the freezer using compressed air having a temperature at which frost does not melt. The disadvantage of this solution is the low removal efficiency

and the practical impossibility of removing harder structures, such as ice.

The aim of the proposed invention is to eliminate these drawbacks, namely, improving the reliability of cleaning and reducing energy consumption.

The goal is achieved by introducing ice particles into the gas stream prior to feeding.

During long-term operation of refrigeration units, the surfaces of cooling coils and other similar heat exchangers of refrigeration units, walls, ceilings and the storage objects themselves are covered with a layer of frost, ice or frost. This worsens the storage conditions of the freezing objects, increases the energy consumption of refrigeration units.

A requirement arises to remove such formations from the surface of cooling heat exchangers, etc., The problem is solved as follows: a stream of gas and ice is directed to a surface covered with a layer of such growths and formations. Ice particles hit with a layer of namoro

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They destroy the structure of this layer, facilitating the entrainment of destroyed particles by a gas jet. The temperature of the gas stream and the ice particles supplied together to remove the build-up and clean the surfaces should be lower than the temperature of the thawed ice to prevent sticking. In this case, it is necessary to ensure the stiffness of the ice particles and increase the speed of the gas and ice stream to increase their destructive capacity.

The method can be implemented as the following device. The device includes: a compressor 1, a container with cryogenic liquid 2, a container with water 3, a water supply system 4, a cryogenic liquid supply system 3, a nozzle b.

The device operates as follows. Compressed air from compressor 1 enters nozzle 6, where expansion expands its temperature. The cryogenic liquid from the container 2 also enters the nozzle 6 via the supply system 5. Water from the container 3 also enters the nozzle 6 through the supply system 6. In the nozzle 6, the cryogenic liquid is gasified by cooling air. Water fed into a stream of cold gas lowers its temperature, turning into particles of ice. The jet itself is then directed towards the object being cleaned.

Claims (1)

The proposed technical solution allows providing effective and economical cleaning of surfaces from frost, ice or frost. Profitability is achieved due to the fact that cleaning is carried out during the period of operation of the refrigerating chamber or machine, and there is no defrost followed by freezing. In addition, no heat is introduced into the refrigeration unit, as is the case with the analogue, which violates the storage conditions and requires an increase energy consumption of the refrigeration unit to compensate for the heat gain, and the supplied cryogenic liquid even lowers the temperature of the chamber and its contents, while water drops are not formed which, when sprayed with gas jet capable freezes on various installations and products storage elements. The introduction of ice particles into the gas stream increases the reliability of surface cleaning. Moreover, unlike a cold gas stream, gas streams with ice particles are able to remove not only loose growths from the surfaces, but also such solid formations as ice, ice flows and even mechanical structures. Particles of ice, colliding with a layer of frost, destroy the structure of this layer, facilitating its further ablation by a stream of gas and ice. At the same time, ice and gas, being environmentally friendly substances do not pollute the chambers, the frozen object and are not dangerous to humans. And furthermore, since the cleaning efficiency is increased, less high pressure gas is required, which reduces the energy costs of the cleaning. SUMMARY OF THE INVENTION A method of removing an ice layer from a surface of a refrigerator, comprising exposing it to a directed jet of compressed gas with a temperature below the temperature of that ice, characterized in that, in order to increase the reliability of cleaning and reduce the energy consumption of the refrigerator, ice particles are introduced into the gas stream before being supplied .