SU888924A1 - Open refrigerating shop-window - Google Patents

Description

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The invention relates to commercial refrigeration equipment, namely, open refrigerated display cabinets for storing, displaying and selling perishable refrigerated food products in self-service stores.

A well-known open refrigerated display case includes a heat-insulated body and a metal duct forming a cooled volume with hinged fixtures for products placed inside it. The air curtain is provided with a circulation loop consisting of an axial fan, a discharge duct and distribution louvers

However, in this display case, there is an uneven distribution of the frost on the surface of the evaporator, the heat exchange fins of which are located along the direction of air flow, which contributes to clogging of certain areas of the evaporator with frost and worsens the conditions for its defrosting.

Closest to the proposed invention to the technical essence and the achieved result is an open refrigerated display case containing a heat insulated casing, a perforated ceiling and vertical partitions installed to form a channel between them and

10 a housing for circulating air, a fan and a fin-tube evaporator located in the upper part of the channel

2

Claims (2)

However, in that display case there is a month of uneven distribution of cooling air flows throughout the internal volume of the display case and, accordingly, uneven distribution of air temperatures in this volume. Heat 20 exchange evaporator fins installed parallel to the direction of flow of the air supplied by the fan do not contribute to mixing and uniform distribution of the air flow along the evaporator. The purpose of the invention is more intensive mixing and uniform distribution of air. The goal is achieved by the opening of a refrigerated showcase that includes a thermally insulated casing, a perforated ceiling and vertical partitions installed to form a channel between them and the casing. For air circulation, the fan and the ribbed tube evaporator once placed in the upper part of the canal are exhausted. The heater is installed in such a way that its edges are located perpendicular to the axis of the fan. Figure 1 schematically shows the proposed showcase, longitudinal section; FIG. 2 shows a fin-tube evaporator. The refrigerated showcase contains a heat-insulated casing 1, a perforated ceiling 2 and vertical partitions 3 forming a cooled volume, fans k, a ribbed evaporator 5 with a pallet 6 and louvre distribution grids 7. A channel is formed between the case 1 and partitions 3 with a ceiling 2, which is used as suction and discharge ducts 8 and 9. The evaporator 5 has heat exchange fins 10 and connecting cords 11. The principle of the proposed display case is as follows. The air in the intake air duct 8 goes to the fans k and is injected into the discharge duct 9 and which houses the evaporator 5. The directed air flow coming out of the fans k hits the heat exchange fins TO of the evaporator 5 located across the direction of the air flow (figure 2). As a result, mixing and a uniform distribution of air flow throughout the evaporator 5 are achieved. The connecting rolls 11 of the evaporator 5. 4 WITH the side of the pressure duct 8 also contribute to this process. Next, the air flow passes through the evaporator 5 from top to bottom, goes around the tray 6 and through the perforated ceiling 2 enters the cooled volume of the display case. At the same time, an air curtain is formed along the open window opening, providing louver distribution grids 7. The proposed location of the evaporator 5 relative to the fan axis k allows for a more complete use of the heat exchanging surface of the cooling device, prevent clogging of its individual sections with frost, reduce the temperature on the heat exchange surfaces to achieve a more uniform distribution of air temperature over the cooled volume of the cabinet, which improves the conditions of storage Product Formula. Formula of the Invention A refrigerated showcase is open containing a heat-insulated casing, perforated ceiling and vertical, tic-like partitions installed to form a channel between them and the air circulation casing, a fan and a fin-tube evaporator, located in the upper part of the channel, characterized by By the fact that, for the purpose of more intensive mixing and uniform distribution of air, the evaporator is installed in such a way that its edges are located perpendicular to the axis of the fan. Sources of information taken into account in the examination 1. Small refrigeration units and refrigerated transport. Help Ed. A.V. Bykov. M., Food Industry, 1978, p. 11-12. 2. US patent number 382725, (l.62-256, published 1970. (prototype).