JPH0749171A - Absorption type refrigerator - Google Patents

Abstract

PURPOSE:To keep the evaporation dish from overflowing with water from defrosting by setting the evaporation dish on a high-temperature double pipe and by passing through the evaporation dish a part of a dilute solution pipe which connects a high- temperature double pipe to an absorber. CONSTITUTION:An evaporation dish 25 is set on a high-temperature double pipe 10 of an absorption cooling system 9 in a manner of effecting heat transfer. A part of a dilute solution pipe 26 which connects the outer pipe 20 of the high-temperature double pipe 10 to the top of an absorber 18 is passed through the evaporating dish 25. Thus the evaporation dish 25 is placed on the high-temperature double pipe 10 in a manner of a heat exchanger and the dilute solution pipe 26 connecting the high- temperature double pipe 10 to the absorber 18 is partly passed through the evaporation dish 25 so that the evaporation of the water from defrosting can be accelerated by virtue of the heat from the high-temperature double pipe 10 and also the heat from the dilute solution pipe 26. Inside the evaporation dish 25 placed on the high- temperature double pipe 10 in a manner of a heat exchanger, by forming ribs for making the water from defrosting stagnant on the high-temperature double pipe 10 the water from defrosting is made to be stagnant preferably in an excellent space in terms of transfer of heat from the high-temperature double pipe 10 inside the evaporation dish 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerator for cooling the inside of a refrigerator by an absorption cooling system.

[0002]

2. Description of the Related Art Conventionally, an absorption type refrigerator is disclosed in, for example, Japanese Patent Laid-Open No.
There is one disclosed in Japanese Patent No. 170767.

Hereinafter, the conventional absorption type refrigerator will be described with reference to the drawings. FIG. 6 is a vertical sectional view of a conventional absorption refrigerator, FIG. 7 is a schematic view of a cooling system of the conventional absorption refrigerator, and FIG. 8 is a perspective view of an evaporation dish of the conventional absorption refrigerator.

Reference numeral 1 is an absorption type refrigerator, and a heat insulating material 4 is filled between an outer box 2 and an inner box 3. A dew tray 5 formed integrally with the inner box 3 is provided at the upper back of the inner box 3.
A drain guide 7 is closely attached to the drain hole 6 of the dew tray 5, penetrates the inner box 3, the heat insulating material 4, and the outer box 2 and is connected to a drain hose 8 outside the refrigerator to be attached. It is attached to the back surface of the outer box 2 and guided into the evaporation tray 11 which is in close contact with the high temperature double tube 10 provided in the lower part of the absorption cooling system 9. Reference numeral 12 is an evaporator, which is attached to the heat conducting plate 13 and is attached to the inner upper portion of the inner box 3.

Hydrogen gas and ammonia water are enclosed in the absorption cooling system 9, and the generator 14 and the heater 15 for heating the generator 14 and the generator 14 are mainly used.
The rectifier 16 communicating with the upper side, and the condenser 1 below the rectifier 16
7, an absorber 18 and a liquid receiver 19 below it. Furthermore, the high temperature double pipe 1 that connects the liquid receiver 19 and the generator 14 to each other
0, a dilute solution pipe 21 that connects the outer pipe 20 side of the high temperature double pipe 10 and the upper part of the absorber 18, a liquid pipe 22 that communicates the condenser 17 outlet and the evaporator 12 inlet, the evaporator 12 outlet and the liquid receiver 19 And a mixed gas conduit 23 communicating with each other.

Next, the operation of the absorption refrigerator 1 will be described. Ammonia gas heated by the heater 15 and boiled in the generator 14 reaches a high temperature in the rectifier 16 and is cooled by the rectifier 16 to condense and separate the water content and return it to the generator 10. Only reaches the condenser 17, is cooled and liquefied. The liquefied ammonia flows down the liquid pipe 22 and enters the evaporator 12, where it is evaporated and diffused in the hydrogen gas to produce a cooling effect. The evaporated ammonia gas is mixed with hydrogen gas to have a heavy specific gravity, and the mixed gas conduit 23
And flows down to the liquid receiver 19, flows into the absorber 18 from the lower part, and rises.

In the absorber 18, since the ammonia dilute solution is flowing down from above through the dilute solution pipe 21, only the ammonia in the mixed gas is absorbed by this and reaches the evaporator 12 as only hydrogen gas. The refrigerating chamber 24 is cooled by repeating the above.

Next, defrosting of the absorption refrigerator 1 will be described. The frost adhering to the evaporator 12 and the heat conduction plate 13 is melted and dropped to the dew tray 5 by natural defrosting at regular time intervals, drained to the evaporation tray 11 via the drain guide 7 and the drain hose 8, and then to the evaporation tray 11. It is spontaneously evaporated by the heat of the high temperature double tube 10 that is in close contact.

Since the absorption refrigerator 1 uses ammonia as a refrigerant and has less mechanical noise and vibration than the compressor system, it is mainly used for guest rooms such as hotels and inns. Came.

[0010]

However, in recent years, ozone depletion of specific CFCs has become a problem, and the development of substitutes for CFCs in refrigerators is being carried out at a rapid pace. Against this background, absorption refrigerators that use ammonia as a refrigerant are being reviewed because they have nothing to do with ozone layer depletion, and demand for households is gradually increasing.

However, in the above-mentioned conventional structure, the capacity of the evaporation tray has a margin in consideration of a large amount of defrost water generated when the door of the refrigerator is frequently opened and closed. There was a problem that the heat of was difficult to transfer to the defrosting water, the evaporation capacity was insufficient, and the evaporation dish overflowed.

The present invention solves the conventional problems and provides an absorption refrigerator in which defrosting water does not overflow from an evaporation tray.

[0013]

In order to achieve this object, an absorption refrigerator according to the present invention has an evaporation tray placed on a high temperature double tube in a heat exchange manner and a part of the evaporation tray inside the evaporation tray. The dilute solution pipe is arranged and connects the high temperature double pipe and the absorber.

Further, the inside of the evaporation dish which is placed on the high temperature double pipe in a heat exchange manner is provided with a rib for retaining defrosting water roughly on the high temperature double pipe.

[0015]

With the above-described structure, the absorption refrigerator of the present invention promotes the evaporation action of defrost water by the heat from the high temperature double pipe and the heat of the dilute solution pipe, and prevents the defrost water from overflowing the evaporation dish. Can be prevented.

Further, since the defrosted water preferentially stays in the space having excellent heat conduction from the high temperature double pipe inside the evaporation dish, the defrosting water is promoted to evaporate, and the defrosted water is removed from the evaporation dish. You can prevent it from overflowing.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the absorption refrigerator according to the present invention will be described below with reference to FIGS. 1, 2 and 3. It should be noted that the same components as those of the related art are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a schematic diagram of a cooling system for an absorption refrigerator according to a first embodiment of the present invention. FIG. 2 is a vertical sectional view of the absorption refrigerator according to the first embodiment. FIG. 3 is a perspective view of the evaporation dish of the absorption refrigerator according to the first embodiment.

Reference numeral 25 denotes an evaporation dish which is mounted on the high temperature double pipe 10 of the absorption cooling system 9 in a heat conductive manner, and which connects the outer pipe 20 side of the high temperature double pipe 10 and the upper portion of the absorber 18 to each other. A part of the solution pipe 26 is arranged inside the evaporation dish 25.

As described above, the absorption refrigerator 1 of this embodiment
Is an evaporation dish 2 which is placed on the high temperature double tube 10 in a heat exchange manner.
5 and a dilute solution pipe 26, a part of which is disposed inside the evaporation tray 25 and which connects the high temperature double pipe 10 and the absorber 18 to each other, the high temperature double pipe 10 It is possible to promote the evaporation action of the defrost water by the heat from the and the heat of the dilute solution pipe 26 and prevent the defrost water from overflowing the evaporation dish 25.

Next, a second embodiment will be described with reference to FIGS. The same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 4 is a perspective view of an evaporating dish of an absorption refrigerator according to the second embodiment of the present invention. FIG. 5 is a sectional view of the evaporation dish of the absorption refrigerator according to the second embodiment.

Reference numeral 27 denotes an evaporating plate mounted on the high temperature double pipe 10 of the absorption cooling system 9 in a heat conductive manner. A rib 28 is provided inside the evaporating plate 27 and roughly above the high temperature double pipe 10. The tip of the drain hose 8 is directed to the space 29 surrounded by the rib 28, and the defrost water first stays in this space 29.

As described above, the absorption refrigerator 1 of this embodiment
Is an evaporation dish 2 placed on the high temperature double tube 10 in a heat exchange manner.
In the inside of the high temperature double pipe 10, a rib 28 for retaining defrosting water is provided in the inside of the high temperature double pipe 10. It is possible to preferentially stay in the excellent space 29, accelerate the evaporation action of the defrost water, and prevent the defrost water from overflowing the evaporation tray 27.

[0025]

As described above, according to the present invention, the evaporation tray mounted on the high temperature double tube in a heat exchange manner and a part of the evaporation tray are disposed inside the evaporation tray, and the high temperature double tube is provided. Since it is composed of a dilute solution pipe that communicates the pipe with the absorber, the heat from the high temperature double pipe and the heat of the dilute solution pipe accelerate the evaporation action of the defrost water, and the defrost water evaporates. You can prevent it from overflowing the plate.

Further, since a rib for retaining defrosting water is provided roughly on the high temperature double pipe inside the evaporating dish which is placed on the high temperature double pipe in a heat exchange manner, it is removed. Frost water preferentially stays in the space with excellent heat conduction from the high temperature double tube inside the evaporation tray, which accelerates the evaporation action of defrost water and prevents defrost water from overflowing the evaporation tray. .

[Brief description of drawings]

FIG. 1 is a schematic rear view of a cooling system for an absorption refrigerator according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of the absorption refrigerator according to the first embodiment.

FIG. 3 is a perspective view of an evaporation dish of the absorption refrigerator according to the first embodiment.

FIG. 4 is a perspective view of an evaporation dish of an absorption refrigerator according to a second embodiment of the present invention.

FIG. 5 is a sectional view of the evaporation dish of the absorption refrigerator according to the first embodiment.

FIG. 6 is a vertical sectional view of a conventional absorption refrigerator.

FIG. 7 is a schematic rear view of a conventional absorption refrigerator cooling system.

FIG. 8 is a perspective view of an evaporation dish of a conventional absorption refrigerator.

[Explanation of symbols]

 1 Absorption Type Refrigerator 10 High Temperature Double Tube 12 Evaporator 14 Generator 15 Heating Heater 16 Concentrator 17 Condenser 18 Absorber 19 Liquid Receiver 25 Evaporating Dish 26 Dilute Solution Pipe 27 Evaporating Dish 28 Rib

Claims (2)

[Claims] 1. A generator for evaporating a liquid refrigerant, a rectifier communicating with the upper side of the generator, a condenser located under the rectifier, an evaporator, and a refrigerant gas in the lower part of the evaporator. An absorber that absorbs, a receiver that stores the liquid refrigerant in the lower part of the absorber, a high-temperature double pipe that opens to the lower part of the receiver and communicates with the generator, and a heat on the high-temperature double pipe. An evaporating dish that is placed exchangeably, a dilute solution tube that is partially disposed inside the evaporating dish and that connects the high temperature double tube and the absorber, and heating that heats the generator. Absorption refrigerator with a heater. 2. A generator for evaporating a liquid refrigerant, a rectifier communicating with the upper side of the generator, a condenser located below the rectifier, an evaporator, and a refrigerant gas at the bottom of the evaporator. An absorber that absorbs, a receiver that stores the liquid refrigerant in the lower part of the absorber, a high-temperature double pipe that opens to the lower part of the receiver and communicates with the generator, and a heat on the high-temperature double pipe. An absorption refrigerator comprising an evaporating dish placed exchangeably and a rib for accumulating defrosting water roughly on the high temperature double pipe inside the evaporating dish.