JPH04124564A - Absorption refrigerating machine - Google Patents

Abstract

PURPOSE:To accumulate concentration energy without wasting it and prevent crystalization at injurious places in a pipeline and the like by providing a crystalizing means, crystalizing by cooling, and a crystal retaining means in the system of solution of a solution heat exchanger. CONSTITUTION:A cooling crystalizer and a crystal retainer are provided in the system of solution of a tube 4-an absorber A-a tube 1 from the concentrated solution pipeline of the tube 4, comming out of the heating side of a heat exchanger H to the dilute solution pipeline of the pipe 1 entering the heated side of the heat exchanger H. A cooling crystalizer, consisting of fin tubes 11, and a perforated plate 12 are provided below the absorber A around the fin tubes 11, for example, to obtain a crystal retainer. The cooling crystalizer is cooled by inlet cooling water and when the concentration of the solution becomes high, crystals are deposited between the fins. When the solution flows through the holes of the crystal retainer and the concentration of the solution is reduced or the temperature of the solution is increased, crystals begun to be molten from the outside thereof. Even when increase of temperature of the cooling water is sudden and crystals are separated, crystal blocks are retained around the tube by the crystal retainer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an absorption refrigerator, and particularly to an improvement of an absorption refrigerator using a salt absorbent.

[Conventional technology]

Conventionally, with salt absorbents, crystals clog pipes,
The flow may be obstructed and the product may become inoperable.

Usually, the countermeasure against crystallization in the above case is to mix a refrigerant into the solution to dilute the solution when the temperature and concentration are such that crystals will form.

[Problem to be solved by the invention]

The above crystallization countermeasure by mixing a refrigerant into the solution to dilute the solution dilutes the concentrated solution, which wastes energy and is economically problematic.

An object of the present invention is to solve such problems and provide an economical absorption refrigerator that can accumulate concentration energy without wasting it.

[Means to solve the problem]

In order to achieve the above object, the present invention uses an incest, an absorber, an evaporator, a condenser, and a solution heat exchanger as main components, and connects these with solution piping and refrigerant piping to form an absorption cycle. In a refrigerator, means for cooling, crystallizing and retaining crystals is provided in the solution system from the heating side outlet of the solution heat exchanger, passing through the absorber, to the heated side inlet of the solution heat exchanger. This is a characteristic absorption refrigerator.

In the above-mentioned absorption refrigerator, cooling in the means for crystallizing the crystals is preferably performed with cooling water or outside air, and in particular, cooling is preferably performed with outside air using a heat vibrator. Further, the means for crystallizing and holding the crystals is preferably a cooling crystallizer and a crystal holder, which can be installed in various shapes in the above-mentioned piping or in the absorber.

[For production]

The present invention aims to identify the location where crystals occur and eliminate the harm caused by the crystals. If the solution is cooled with cooling water or the like in a means of crystallizing crystals, specifically in a cooling crystallizer, crystals are first generated in the cooling crystallizer in the solution cycle. . When crystals are generated, the remaining solution has a low concentration and becomes difficult to crystallize in other parts. When the crystals in the crystallizer dissolve into solution, they serve as an absorbent and store excess energy when the temperature drops.

In addition, the location of the means to crystallize and hold the crystals was specified around the absorber, because although it is okay to cool the area around the absorber during operation, cooling the generator system may result in overheating. This is because this is not preferable because it leads to a decrease in efficiency. In addition, the reason for the provision of the crystal cage was to prevent the crystals that have been crystallized from clogging the piping when they melt when the temperature rises. I try not to let that happen.

〔Example〕

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited thereto.

Embodiment 1 FIG. 1 shows a flow diagram of a normal single-effect absorption refrigerator.

In FIG. 1, G is a generator, A is an absorber, E is an evaporator, C is a condenser, and H is a heat exchanger.

The dilute solution is then introduced into the generator G from the absorber A through the tube 1 and through the heated side of the heat exchanger through the tube 2. In the generator G, the refrigerant is heated by the heat source from the tube 7, and the refrigerant vapor is generated and concentrated. The concentrated solution passes from tube 3 through the heating side of heat exchanger H, is introduced from tube 4 into absorber A, absorbs the refrigerant, becomes a dilute solution, and is circulated through tube 1.

Further, the refrigerant vapor generated in the generator G is cooled and condensed by cooling water in the condenser C, and is introduced into the evaporator E through the pipe 5. In the evaporator E, the refrigerant is circulated through the pipes 6, absorbs heat from the cold water, and evaporates. As a result, more chilled water is provided for cooling and the like.

In the above-mentioned ordinary single-effect absorption refrigerator, in the present invention,
Pipe 4- from the concentrated solution pipe of pipe 4 exiting the heating side of heat exchanger H to the dilute solution pipe of pipe 1 entering the heated side of heat exchanger H
The solution system of the absorber A-tube 1 is provided with means for cooling and crystallizing and holding, specifically a cooling crystallizer and a crystal holder.

FIG. 2 shows a partially enlarged view of an absorber in which a cooling crystallizer and a crystal holder are provided in the absorber A. FIG. 2 shows an example in which a cooling crystallizer consisting of a fin tube 11 and a porous plate 12 are provided around the fin tube 11 in the lower part of the absorber A to serve as a crystal holder. The cooling crystallizer is cooled by inlet cooling water, and as the concentration increases, crystals begin to precipitate between the fins. The solution flows through the pores of the crystal retainer. As the solution concentration decreases or the solution temperature increases, the crystals begin to melt from the outside. Even if the cooling water temperature rises rapidly and the crystals come off, the crystal clusters are retained around the tube by the retainer.

Embodiment 2 FIG. 3 is a partially enlarged view of the main side of an absorber according to another example of the present invention, in which a tube 4 is provided with a cooling crystallizer and a crystal retainer. In Fig. 3, 13 is a cooling crystallizer and a crystal holder;
4 is a heat vibrator 15 is a fin.

FIG. 4 shows an enlarged view of part 13 in FIG. 3. In FIG. Even if the liquid crystallizes, it accumulates at the bottom of the cooling crystallizer 13 to prevent it from entering the tube.

In FIG. 3, a cooling crystallizer 1 is installed on the inlet side of absorber A.
3, the solution is cooled with outside air using a heat vibrator 14. The fins 15 are wavy and the intervals between the fins 15 are narrowed so that the crystal lumps remain large and do not come loose. The fins 15 serve as both a cooling section and a crystal holding section.

〔Effect of the invention〕

According to the present invention, a means for crystallizing and holding the crystals by cooling is provided to force the crystals to crystallize in a specific location, so concentration energy can be accumulated without wasting it. It can prevent crystals from forming in harmful places such as inside the home.

[Brief explanation of the drawing]

Fig. 1 is a flow diagram showing an example of an absorption refrigerator to which the present invention is applied, Fig. 2 is a partial expander of an absorber to which the present invention is applied, and Fig. 3 is a flow diagram showing an example of an absorption refrigerator to which the present invention is applied. FIG. 4 is a partially enlarged view of the inlet side of the absorber, which is an example of this, and is an enlarged view of the cooling crystallizer of FIG. G... Generator, A... Absorber, E... Evaporator, C
... Condenser, H-... Heat exchanger, 1-4... Solution piping, 5.6... Refrigerant piping, 7... Heat source, 8.9-...
・Cooling water, 10... Cold water, 11... Fin tube, 12... Porous plate, 13... Cooling crystallizer, 1
4...Heat vibe, 15...Fin, 16...
Projection, 17... Baffle 11 Figure

Claims (1)

[Claims] 1. In an absorption refrigerator whose main components are a generator, an absorber, an evaporator, a condenser, and a solution heat exchanger, and which are connected by solution piping and refrigerant piping to form a cycle, Absorption refrigeration characterized in that the solution system from the heating side outlet of the heat exchanger, through the absorber, to the heated side inlet of the solution heat exchanger is provided with means for cooling to crystallize and retain crystals. Machine. 2. The absorption refrigerator according to claim 1, wherein cooling in the means for crystallizing the crystals is performed using cooling water or outside air. 3. The absorption refrigerator according to claim 1, wherein cooling in the means for crystallizing the crystals is performed using outside air using a heat pipe.