RU1814007C - Combination absorption refrigerator - Google Patents

Abstract

Usage: in domestic refrigerators absorption type. SUMMARY OF THE INVENTION: a combined absorption cooler comprises a refrigerating cabinet and a heat chamber mounted on its upper lid, which is thermally coupled by means of a two-phase thermosiphon with a rectifier of an absorption-diffusion refrigeration unit, while the vertical walls of the inner cavity of the heat chamber are thermally connected with the corresponding walls of the outer casing with the help of two-phase thermosiphons, the evaporation sections of which are located at the walls of the outer casing, and densation sites - at the walls of the internal cavity, 2 il.

Description

The invention relates to refrigeration equipment, in particular to combined absorption refrigerators with a heat chamber (KAH).

The purpose of the invention is to increase the efficiency of the KAC.

BRIEF DESCRIPTION OF THE DRAWINGS FIGURE 1 is a back view of a KAC; figure 2 is a diagram of a heat chamber,

 KAKh contains a refrigerating cabinet 1 and a heat chamber 2 mounted on its upper cover. ADHA, which is a part of KAKh, contains a generator 3, a rectifier 4, a condenser 5, a liquid ammonia line 6, a balancing line 7, an absorber 8, an absorber tank 9, and liquid heat exchanger 10 and an evaporator (not shown in the drawing).

ADCA rectifier 4 has thermal contact with DFTS 11, the condensation section 12 of which is fixed on the heat-absorbing surface of the heat chamber 2.

The evaporation section 13 of the DFTS is in thermal communication with the rectifier 4 in the area covered by the insulating casing 14. The internal cavity 15 of the heat chamber 2 is covered by thermal insulation 16. In the insulation volume 16, additional DFTS 17 are located. The evaporation sections 18 of the DFTS. 17 are thermally coupled to the wall of the outer casing, and the condensation sections 19 are connected to the walls of the inner cavity 15.

KAH works as follows.

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8

VI

When thermal power is supplied to the thermosyphon 3, vapor generation and circulation of the liquid solution between the thermosyphon 3 and the absorber 8 are generated. The circulation is carried out through the liquid heat exchanger 10 and the absorber tank 9. The vapor containing ammonia flows from the thermosyphon 3 to the rectifier 4, where water vapor is removed which condenses on the inner wall of the rectifier to produce heat of vaporization. The condensate flows into the generation zone, and the purified ammonia vapor enters the condenser 5. The heat of distillation is transferred to the evaporation zone 13 of DFTS, partially filled with liquid heat carrier. The heat carrier vapor is generated, the steam is transported to the condensation zone 12, which is thermally connected to the internal cavity 15, where it condenses, leaving the heat of vaporization to heat the heat chamber 2. The condensate flows to the evaporation zone of DFTS 13, and the evaporation-condensation the cycle repeats. Ammonia vapor entering the condenser 5 is liquefied to remove the heat of vaporization into the environment. The condensate through line 6 enters the evaporator, where, evaporating into an inert gas medium, provides the effect of artificial cooling, stabilization of the supply of liquid ammonia to the evaporator is carried out using equalization line 7, the ammonia-saturated vapor-gas mixture enters the absorber tank 9, from where it flows counterflow the weak solution moves along the absorber 8. In the interaction of a weak solution and a saturated vapor-gas mixture, the vapor-gas mixture is purified from ammonia vapors and the weak solution is saturated with ammonia. The purified vapor-gas mixture enters the evaporator, and the strong solution through the tank 9 and the liquid heat exchanger 10 to the lower part of the thermosyphon 3. After this, the ADHA cycle is repeated.

The internal cavity 15 of the heat chamber 2 is filled with water, which must be heated for various domestic needs, for example, for washing dishes in rural areas, where there is mainly no hot water supply. Well or tap water, even in summer, has a temperature, and the ambient temperature is 25-30 ° С, i.e. in the initial period has a temperature difference.

The presence of a temperature difference between the outer casing and the inner cavity of the heat chamber 15 causes the generation of coolant vapor, partially filling the evaporation zone 18 of additional

DFTS 17. The coolant vapors enter the condensation zone 19, which is thermally coupled to the walls of the internal cavity 15, where, by liquefying, the heat of vaporization is lost. for heating water

filling the internal cavity 15. When the water is heated to ambient temperature and above, the additional DFTS 17 are turned off, which is achieved by the fact that the coolant is concentrated

in the evaporation zone 18, which has a temperature lower than in the condensation zone 19, i.e. additional DFTS operate in thermal diode mode.

Calculations show that at the initial

the water temperature in the heat chamber is 1 ° C, the ambient temperature is 25 ° C, and the heat power supplied by DFTS 11 from the ADCA rectifier 4, 10 W 40 liters of water will be heated to a temperature

50 ° C is 1.5 times faster than in the absence of additional DFTS 18 connecting the internal cavity 15 with the external casing.

Claims (1)

The claims The combined absorption refrigerator comprises a refrigerating cabinet, a refrigerating unit and a heat chamber with an internal cavity and an outer casing, characterized in that, for the purpose of to increase work efficiency, the heat chamber is located outside the refrigerator and is thermally connected to the rectifier of the refrigeration unit using a two-phase thermosiphon, while the vertical walls of the inner cavity of the heat chamber are thermally connected to the corresponding walls of the outer casing using additional two-phase thermosiphons, the evaporation sections of which are connected to the walls of the outer casing and are located below the condensation sections associated with the walls of the inner cavity. Editor Figure 2 Compiled by A. Titlov ... Tehred M. Morgenthal Corrector E. Papl