Refrigerating box with high-efficiency energy-saving evaporator

Abstract

The invention discloses a refrigerating box with a high-efficiency energy-saving evaporator for a refrigerator. The refrigerating box comprises an evaporating board, and evaporating tubes arranged on the evaporating board, wherein the evaporating tubes are circuitously distributed on the evaporating board in an S shape; an air return tube is connected with the evaporating tubes integrally without a welded junction; and a refrigerant from a capillary flows from the top of the evaporator to the bottom of the evaporator, flows from the bottom of the evaporator to the top of the evaporator, and flows to a compressor through the air return tube. The evaporating tubes are skillfully arranged, so that the density of the evaporating tubes in the evaporator is higher than that of evaporating tubes in a common evaporator, the evaporating temperature is lower, and the cooling speed is higher; the evaporator has functions of a reservoir, after the refrigerator stops working, the refrigerant at the temperature of about 26 DEG C below zero stored in the evaporator perform heat exchange with foods in the refrigerator, and the shutdown time of the refrigerator is prolonged; the evaporator has a large inner diameter, the refrigerant has low flow resistance, and power consumption is low; and due to the three aspects, the refrigerator is more energy-saving, and the evaporator has a simple structure, a few welded junctions and low cost and is easy for mass production.

Description

technical field [0001] The invention relates to the technical field of refrigeration, and more specifically relates to a refrigerator with a high-efficiency energy-saving evaporator. Background technique [0002] The refrigeration of the refrigerator relies on the evaporator in the refrigerator to exchange heat with the food. Therefore, the design of the evaporator in the refrigerator is particularly important. There are two main types of evaporators used in refrigerators, namely tube-sheet evaporators and blown-inflation evaporators. type evaporator. Existing tube-sheet evaporators such as figure 1 As shown, the evaporating tube and the evaporating plate are pasted together and between the inner cavity of the refrigerator and the heat insulation layer. The advantage is that the inner diameter of the tube is large, the refrigerant flow resistance is small, and the structure and production process are very simple. Its disadvantages are as follows: The large distance between...

AI Technical Summary

Problems solved by technology

Existing tube-sheet evaporators such as figure 1 As shown, the evaporating tube and the evaporating plate are pasted together and between the inner cavity of the refrigerator and the heat insulation layer. The advantage is that the inner diameter of the tube is large, the refrigerant flow resistance is small, and the structure and production process are very simple. Its disadvantages are as follows: The large distance between tubes and tubes leads to uneven surface temperature of the evaporator and high overall surface temperature, slow cooling speed; the second disadvantage is that the tube-sheet evaporator needs to increase the liquid reservoir, and there are two more welds to make the refrigerator leak Big risks and high costs

Therefore, there are also manufacturers that use inflation-type evaporators. The inflation-type evaporator is an evaporator made of double-layer aluminum plates and then blown by gas. The surface of the evaporator is powder-coated and placed inside the refrigerator. The advantage of heat exchange is that the evaporation tube is dense, the surface temperature of the evaporator is low, and the cooling speed is fast. The disadvantage is that due to the inflation process, the inner diameter of the tube is generally below 3.2mm, so the refrigerant flow resistance is large and the power consumption is large. And the production process is complicated and costly. The second disadvantage is that there is a welding joint between the inflatable evaporator plate and the return air pipe, and there is a safety hazard that the refrigerant contacts food or other electrical components due to evaporator leakage; The evaporator directly exchanges heat with the food, there is a hidden danger that the protective layer on the surface of the evaporator will fall off and produce harmful substances, and it is placed in the box, which is not beautiful

The existing two evaporators have their own advantages and disadvantages, and the common disadvantages are high cost and no energy saving

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