RU188652U1 - FRIDGE - Google Patents

Abstract

The utility model relates to the field of refrigeration equipment and is intended for storage of vaccines, bacteriophages, probiotics and other immunobiological drugs, in the temperature range from + 2 ° C ... + 8 ° C. The technical task of the claimed utility model is to create a refrigerator capable of maintaining the temperature for 24 hours when power is turned off. The technical result of the utility model is to maintain the temperature in the refrigerator in the range of + 2 ° C ... + 8 ° C for at least 24 hours when the electric power is turned off The technical result is achieved by the fact that the refrigerator contains an internal chamber formed by a heat-insulated cabinet and heat-insulated door, shelves installed in the chamber, an evaporator, an air duct, a fan, a closed housing, a condenser, a compressor, a microprocessor control unit, while the air duct is made with holes on the front wall of the chamber, cooled by a foamed tubular evaporator, made in the form of a coil and installed on the insulation side along the entire rear wall, and the chamber is surrounded by cooling circuit formed by a plurality of cold accumulators.

Description

The utility model relates to the field of refrigeration equipment and is intended for storage of vaccines, bacteriophages, probiotics and other immunobiological drugs, in a temperature range of + 2 ° C ... + 8 ° C.

Known refrigerator (patent of the Russian Federation for utility model No. 39690, publ. 10.08.2004) containing a foamed cabinet, doors with insulation, on the back wall there is an air duct separating a flat evaporator installed with gaps between the air duct and the back inside wall of the cabinet insulated air, in the upper part of the cabinet there is a fan installed parallel to the upper wall of the cabinet with the direction of flow on the door, closed by a casing, inside the cabinet there are shelves with cassettes, four on each shelf, made with separate cells, condenser and compressor. The refrigerator also contains a microprocessor control unit and a tangential-type fan.

Known refrigerator (RF patent for useful model No. 40447, publ. 10.09.2004), containing a chamber formed by a heat-insulated cabinet, and a door with a lock, shelves installed in the chamber, an evaporator, an air duct, a fan mounted above the air duct and closed by a casing, a condenser, a compressor, a microprocessor control unit, and along the door in the chamber are mounted on hinges transparent panels that the duct has a U-shaped structure with openings in the front and side walls of the chamber, cooled by a foamed tubular evaporator, in Made in the form of a coil of tube installed on the insulation side along the entire rear wall, and the casing is made of one piece with holes located on the front wall.

In known refrigerators, it is not envisaged to maintain the temperature during an emergency power outage, but, as is well known, the inconsistency of storage conditions, in particular temperature conditions, may adversely affect vaccines and other immunobiological drugs.

The technical task of the claimed utility model is to create a refrigerator capable of maintaining the temperature for 24 hours during a power outage.

The technical result of the utility model is to maintain the temperature in the refrigerator in the range of + 2 ° C ... + 8 ° C for at least 24 hours during a power outage.

The technical result is achieved by the fact that the refrigerator contains an internal chamber formed by a heat-insulated cabinet and a heat-insulated door, shelves installed in the chamber, an evaporator, an air duct, a casing-covered fan, a condenser, a compressor, a microprocessor control unit, and the air duct is provided with openings on the front the wall of the chamber cooled by a foamed tubular evaporator made in the form of a coil and mounted on the insulation side along the entire rear wall, and the chamber is surrounded by a cooling con tour, made in the form of a set of cold accumulators.

The proposed utility model is illustrated by the drawings:

Figure 1 shows the front view of the refrigerator with the door open;

Figure 2 shows a side view in section,

Figure 3 shows the view of the stand of the refrigerator in the section,

The refrigerator (FIG. 1, FIG. 2) comprises an internal chamber 1, formed by a heat-insulated metal cabinet 2 and a heat-insulated metal door 3, provided with a locking device and a stand 4.

The refrigerator is mounted on four swivel wheels 5 to facilitate movement.

Chamber 1 is made of aluminum tape, divided into four compartments by shelves 6 and surrounded by a cooling circuit 7, made in the form of a set of cold accumulators 8. Cold accumulators are placed on the lower, upper, lateral and rear sides of chamber 1.

Above the cooling circuit 5, the chamber 1 is surrounded by a layer of thermal insulation 9 made of polyurethane foam.

In the upper part of the chamber 1 placed a tangential fan 10, separated from the cooled space by the casing 11.

A tubular aluminum evaporator in the form of a coil (not shown) is foamed along the back wall of the cabinet 2 along the entire height on the heat insulation side, and an air duct 12 with holes 13 is installed on the front wall of the duct along the rear wall of the chamber 1. The channel formed between the duct 12 and the rear wall of the cabinet 2, through holes on the front wall in its upper part communicates with the tangential fan 10.

A temperature sensor (not shown in Fig.) Is mounted on the rear wall of the chamber 1.

In the lower part of the refrigerator formed by the stand 4 there is a compressor 14, a condenser 15 with a fan 16, a microprocessor control unit with a control panel 17 on the front surface of the stand, designed to install, maintain a given temperature, display the temperature in the working chamber 1 (FIG. 3).

The frame of the inner chamber 1 and the door panel 2 of the refrigeration device are made of polymeric materials with an antimicrobial coating, due to which unpleasant smells associated with the vital activity of microorganisms are eliminated in the refrigerator chamber, and the air in the refrigerator chamber becomes sterile.

Refrigeration in the refrigerator is carried out by a hermetic compression-type unit 14. The insignificant amount contains R600a refrigerant, which is natural gas that does not pollute the environment.

Sealing the doorway of the refrigerator is an elastic seal with a magnetic insert.

The refrigerator works as follows:

The compressor 14 pumps out the refrigerant vapor from the evaporator and injects them into the condenser 15. In the condenser 15, the refrigerant vapor is cooled and condensed. Next, the liquid refrigerant through the filter drier 18 and the capillary pipe enters the evaporator. At the refrigerant inlet to the evaporator, the pressure drops from condensation pressure to boiling pressure. When this happens, boiling up of the refrigerant occurs, while entering the evaporator channels, the refrigerant boils, the energy necessary for boiling in the form of heat, is taken from the surface of the evaporator, cooling the air in the refrigerator. After passing through the evaporator, the liquid refrigerant turns into steam, which is pumped out by the compressor 14.

When the refrigerator operates, the heated air from chamber 1 enters the zone of the fan 10, then the air enters the rear wall of the cabinet 2 cooled by the evaporator, into the space between the duct 12 and the rear wall of the cabinet 2, after which the air enters through the openings 13 on the front wall of the duct 12 in the volume of the chamber 1, while the containers / ampoules placed on the shelves in the chamber 1 are washed by cooled air. Since the rear wall is cooled to its entire height, the air, when cooled, flows into all parts of chamber 1 evenly cooled.

Equipping the refrigerator with a microprocessor control unit allows you to set, maintain a predetermined temperature in the range of + 2 ° C ... + 8 ° C, display the actual temperature value in the working chamber on the control unit panel 17.

Cold accumulators 8 accumulate cold in the process of refrigerator operation.

When the electricity is turned off, the cold accumulators 8 release the accumulated cold, thereby allowing the desired temperature to be maintained for a long time (at least 24 hours) from +2 to + 8 ° С in the refrigerator chamber. At the same time, the presence of cold elements above each compartment of the chamber allows for more uniform cooling of the preparations placed on the shelves.

When the temperature deviates from a predetermined interval, the alarm sound and light (blinking screen) alarms.

The advantages of the proposed utility model:

⎯ The ability to maintain the temperature during a power outage for 24 hours due to the presence of cold accumulators in the whole chamber volume;

⎯ Existence of a heat-insulating metal door with the lock for prevention of unauthorized access;

⎯ Ability to automatically maintain the temperature in the chamber;

⎯ The presence of an alarm when the deviation from the specified temperature range;

⎯ Temperature display on the control panel;

⎯ The presence of a system of forced air circulation;

⎯ Availability of environmentally friendly ozone-safe isobutane refrigerant (R600a), which provides a reduction in energy consumption and noise when the compressor is running;

⎯ Antibacterial coating of the internal cabinet and door panel.

Claims (1)

Refrigerator containing an internal chamber formed by a heat-insulated cabinet and a heat-insulated door, shelves installed in the chamber, evaporator, duct, enclosed fan, condenser, compressor, microprocessor control unit, while the duct is made with openings on the front wall of the chamber cooled by a foamed tubular evaporator, made in the form of a coil and installed on the insulation side along the entire rear wall, characterized in that the chamber is surrounded by a cooling circuit made in ide plurality of cold accumulators.

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