RU1781522C - Refrigerator - Google Patents

Abstract

Use: in domestic refrigerators. SUMMARY OF THE INVENTION: a refrigerator comprises a chamber, a refrigerating unit, a lighting lamp separated by a shade and a heater for defrosting the evaporator, made in the form of a heat pipe, the condenser zone of which is installed to provide thermal contact with the evaporator, and the evaporation zone is placed in the ceiling light bulbs. 3 silt

Description

The invention relates to refrigeration and can be used in domestic refrigerators.

The relevance of the task is determined by the need in all newly released models of refrigerators to ensure automatic defrosting of the evaporator in the refrigerator.

The Biryusa refrigerator 6 is known, in which a defrost appliance is provided (see Operating Instructions 00.10.0000.00 OM). By pressing the button of the defrosting device, the refrigerator is turned off and the defrosting process of the low-temperature compartment is started. The refrigerator will turn on automatically after the snow coat has thawed.

The advantage of this refrigerator is the simplicity of the defrosting device design, as well as the automatic activation of the refrigerator after the end of the defrosting process.

However, the refrigerator has its drawbacks.

The duration of the evaporator defrost process, as defrosting takes place without supplying heat from an additional source, and by heating the evaporator when the refrigeration unit is off from ambient air. In this case, the product is thawed;

Lack of defrost in the automatic mode.

A device is known for preventing fogging of the surface of a refrigerator according to the author. St. No. 410221, class P25O21 / 00. The device comprises a refrigeration unit with a heater made in the form of a heat pipe, the evaporation part of which is located on the heat-dissipating surface of the refrigeration unit, and a condenser part on the surface, which must be prevented from fogging.

The advantage of this device is the simple reliable design of the heater, which allows heating the surface, the fogging of which must be protected without additional energy costs.

A significant disadvantage of a heater made in the form of a heat pipe is the constant supply of heat to the surface where the condenser part of the heat pipe is installed. Therefore fixing

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the condenser part of the heat pipe on a high-temperature evaporator in the refrigerator will lead to a deterioration in the thermal characteristics of the refrigerator. The implementation of the heat pipe is adjustable, which allows periodically at the required time to transfer the necessary amount of heat from the hot nodes of the refrigeration unit in the surface, the fogging of which must be prevented, will significantly complicate the design of the heat pipe, which will reduce the reliability of its operation.

The closest in technical essence (prototype) to the claimed refrigerator is the Biryusa 18 refrigerator (see Operating Instructions 00.18.0000.00ER, set of drawings of the Biryusa 18 refrigerator 00.18 0000.00). The refrigerator contains a cabinet, a refrigeration unit, a high-temperature evaporator, a control unit, a lighting lamp, and two electric heaters are mounted on it for automatic defrosting of the high-temperature evaporator, which are turned on at each stand of the refrigerator. since the electric heating element is exposed to a sharp change in temperature and moisture from the evaporator That complicates its design requirements to provide a safety operation of the refrigerator, as well as heaters consume energy and in the absence of snow coat.

The aim of the invention is to increase the reliability and simplify the design of the refrigerator by providing a heater for defrosting the evaporator in the form of a heat pipe, the condenser zone of which is installed to provide thermal contact with the evaporator of the refrigerator, and the evaporation zone is placed in the ceiling of the lighting lamp.

In FIG. 1 shows the location of the main elements of the refrigerator; in FIG. 2

Section AA with a closed door; in FIG. 3

section BB in FIG. 2.

The refrigerator comprises a food storage chamber 1, a refrigeration unit 2, an evaporator 3 of which is housed in the refrigeration chamber, a control unit 4, comprising a lighting lamp 5 installed in the ceiling 6, and an electronic time switch (shown) that controls the operation of the refrigeration unit 2 and lighting lamp 5 In chamber 1 is installed

a heater 7 in the form of a heat pipe, the evaporation zone 8 of which is inserted into the ceiling 6 of the lighting lamp 5, and the condenser zone 9 is installed to provide thermal contact to the evaporator 3 of the refrigeration unit, on which it is necessary to thaw the snow coat. In order to expand the heat exchange surface of the evaporation zone 8 of the heat pipe,

0, a plate 10 is installed, the coating of which has a high degree of blackness, which contributes to better heating of the evaporation zone with thermal energy released by the illumination lamp 5 when the

5 states.

The proposed refrigerator operates as follows.

The refrigerator is included in the power supply, thermostat knob (in the drawing)

0 of control unit 4 is set to the desired temperature mode. The refrigeration unit operates according to a scheme known in the technical literature, and the evaporator 3 is cooled to a negative temperature, as a result of which condensate accumulates on it, which when frozen turns into a snow coat, which worsens the operation of the refrigeration unit. Due to the location of the condenser zone 9 of the heat pipe 7 on the evaporator 3 with providing thermal contact, at each stand of the refrigeration unit, heat is supplied to the evaporator 3, because the evaporation zone 8 of the heat pipe is located in the shade b of the control unit 4, where the temperature is much higher than the temperature on the surface of the evaporator 3 and this prevents the formation of a snow coat on the evaporator. If the ambient temperature rises or there is a large load of products, when the refrigerator can work without turning off, the defrosting of the evaporator and the formation on it of a snow coat may be violated. For him

5, the refrigerator operates in the following mode.

The defrost button (not shown) located on the control unit 4 is pressed, and a time relay is activated, which for a certain period of time, set for a specific model of the refrigerator, turns off the refrigerator unit and turns on the light lamp 5. The heat emitted by the lamp heats the evaporator 5 8 of the heat pipe 7. which transfers heat to the condenser zone 9 and thawing of the evaporator 3 occurs. After a certain period of time necessary for the complete evaporator 3, the refrigeration unit automatically switches on turns on and the light lamp 5 turns off. The drawings do not show the schematic diagram of the re-time and the connection with the defrost button, because These are devices widely known and used in various devices. The power of the illumination lamp used in refrigerators is 15 W, (30-40)% of this heat energy transferred to the evaporator 3 is sufficient to conduct a complete defrost of the evaporator in (15-20) minutes.

Thus, a refrigerator in which a heater in the form of a heat pipe is installed on the evaporator in the refrigerating chamber, the evaporating part of which is connected to the lamp cover and the condenser part is installed to provide thermal contact with the evaporator, allows the evaporator to defrost the refrigeration unit located in the refrigerating chamber .

The supply of heat to the evaporator in the refrigerator by the heater in the form of a heat pipe, the evaporation zone of which is placed in the lamp cover and the condenser is installed on the evaporator of the refrigeration unit, allows the applicant to conclude that

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venous distinctive features of the claimed device, distinguishing it from the prototype and giving a positive effect, allowing:

To increase the reliability of the device, since the contact of electric heating elements under the influence of the supply voltage with the snow coat and moisture is excluded;

To simplify the design of the refrigerator, as making a heat pipe is less time consuming than making a sealed electric heater.

Form l a isobret and

A refrigerator comprising a food storage chamber, a refrigeration unit including an evaporator installed in a refrigerator, a light lamp separated by a ceiling lamp, and an heater for defrosting the evaporator, which, in order to simplify the design, a heater It is made in the form of a heat pipe, the condenser zone of which is installed to provide thermal contact with the evaporator, and the evaporation zone is brought into the ceiling of the illumination lamp.

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FIG. 1

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FIG. 2

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