JPH0124533Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a diffusion absorption type refrigerator, and particularly provides a diffusion absorption type refrigerator that can increase its refrigerating capacity in response to an increase in the amount of heating.

The refrigerating capacity of a diffusion absorption refrigerator depends on the amount of liquid pumped by the bubble pump using the bubbles of ammonia vapor evaporated in the generator. is maximum when exists.

In other words, the first example shows a conventional diffusion absorption refrigerator.
In the figure, the ammonia vapor generated in the generator 6 turns into bubbles and ascends the bubble pump 15 to reach the separator 1, but as the bubbles rise at that time, the liquid is pumped up and supplied to the dilute solution pipe 8. Ru. However, the amount of pumped liquid varies greatly depending on the state of the bubbles. For example, FIG. 2 shows the state of bubbles in the bubble pump, and (a) shows the case where the amount of heating is small, the amount of bubbles is small, and the amount of pumped liquid is also small.

(b) is the case when the amount of heating is optimal and the amount of liquid pumped is the highest, and (c) is the case where the amount of heating is so large that the steam does not form bubbles and the steam flow is in the center of the pipe and the amount of liquid pumped is small. state.

In this way, a bubble pump with a conventional structure is
As shown in Figure 3A, the amount of liquid pumped due to changes in the amount of heating reaches its maximum only when the heating amount is optimal, and the amount of liquid pumped will be the maximum even if the amount of heating is too high or too low. It becomes less. On the other hand, according to the operating principle of a refrigerator, the greater the amount of heating, the more ammonia vapor is generated, and as a result, a large amount of absorption liquid is required in the absorber. Therefore, a liquid pump with a characteristic that the amount of liquid pumped increases as the amount of heating increases is required.

As shown in FIG. 1, the heating source is an electric heater 1.
If it is 2, a constant amount of heating is always supplied, so even if it is a bubble pump with a conventional structure, the diameter of the pump pipe can be designed to maximize the amount of liquid pumped. When solar heat, exhaust heat from an engine, boiler, etc. is used as a heating source for a refrigerator, the amount of heating is not always constant, so as mentioned above, the amount of liquid pumped increases as the amount of heating increases. A liquid pump is required. The present invention relates to an improved structure of a pump having such characteristics, and its specific structure includes a generator, a separator, a rectifier, a condenser, an evaporator for cooling the refrigerator compartment, and an absorber. A steam generating tank is provided with a liquid receiving tank, a dilute solution pipe, and a generator is arranged independently at approximately the same height as the liquid receiving tank, and this steam generating tank and a separator are connected to each other, and a receiving tank is installed. A liquid lift pump pipe that has a lower opening at a position lower than the liquid level of the liquid tank, thereby forming a steam-tight space above the steam generation tank, and a liquid portion of the steam generation tank and the liquid receiving tank. This is a diffusion-absorption type refrigerator that consists of a connecting pipe and a check valve that is interposed in the pipe and allows flow only from the liquid receiving tank to the steam generating tank.

That is, the present invention installs the steam generation tank independently of the separator and the dilute solution pipe, and connects the steam generation tank and the separator with a specific pump pipe, thereby increasing the efficiency of the steam generation tank. It is possible to pump liquid using the pressure of steam, thereby making it possible to obtain the amount of liquid pumped that is proportional to the amount of heating.

The present invention will be described in detail below based on embodiments shown in the figures. Note that the present invention is not limited thereby.

FIG. 4 is a sectional view of a diffusion absorption refrigerator with a liquid pump according to the present invention. The generator, that is, the lift pump, consists of a pump pipe 15, an expansion tank 16 as a steam generation tank, a heating heat pipe 17, and a communication pipe 19 with a check valve 18, and the rest has the structure shown in the principle diagram of FIG. It's exactly the same.

The expansion tank 16 and the liquid receiving tank 11 are connected to each other by a check valve 18.
The opening of the pump pipe 15 is located below the liquid level 20 in the expansion tank, and the liquid in the expansion tank is heated by the heating pipe 17 and evaporated ammonia vapor. As a result, the liquid level 20 is pushed down to the position of the lower opening of the pump pipe 15. At this time, the check valve 18 allows the liquid to flow only in the direction of the arrow, so the liquid flows into the pump pipe 1.
5 and is pushed up to the upper opening of the pump pipe in the separator 1, and the ammonia vapor is also introduced into the separator 1 via the pump pipe 15. Once the liquid is pushed up to the upper opening of the pump pipe, the pressure in the expansion tank and the pressure in the separator become uniform, and due to the principle of a communicating pipe, the liquid in the liquid receiving tank 11 passes through the check valve 18. and flows into the expansion tank. By repeating this operation, the liquid in the expansion tank 16 will be pumped up one after another while evaporating the ammonia vapor. This cycle of pumping is repeated more quickly as the amount of heating increases, and the amount of pumping per unit time increases in proportion to the amount of heating.

Figure 5 shows a liquid pump having a structure in which the liquid is heated outside the expansion tank, and the liquid is heated in the liquid receiving tank 1.
1 and the expansion tank 16 is heated, and the ammonia vapor is guided to the upper part of the expansion tank.

As described above, in the pump according to the present invention, even if there is a fluctuation in the amount of heating, it is possible to supply an amount of pumped liquid proportional to the fluctuation, and it is possible to produce a refrigeration capacity proportional to the amount of heating. .

[Brief explanation of the drawing]

Figure 1 is a cross-sectional diagram of the principle of a conventional diffusion-type absorption refrigerator, Figure 2 is an enlarged cross-sectional view showing the flow inside the bubble pump, and Figure 3 is a diagram showing the amount of liquid pumped and the amount of heating by the bubble pump. A graph showing the relationship, FIG. 4 is a sectional view of a diffusion absorption refrigerator showing an embodiment of the present invention,
FIG. 5 is a sectional view showing another embodiment. 1... Separator, 2... Rectifier, 3... Condenser,
4... Evaporator, 5... Absorber, 6... Generator, 8
...Dilute solution pipe, 11...Liquid receiving tank, 15...
...pump pipe, 16...expansion tank (steam generation tank),
18...Check valve, 19...Communication pipe.

Claims (1)

[Scope of utility model registration request] It is equipped with a generator, a separator, a rectifier, a condenser, an evaporator for cooling the refrigerator compartment, an absorber, a liquid receiving tank, and a dilute solution pipe, and the generator is installed independently at approximately the same height as the liquid receiving tank. A steam generating tank installed in the tank is connected to the separator, and the lower opening is lower than the liquid level of the liquid receiving tank, thereby sealing the upper part of the steam generating tank. A liquid pump pipe that can form a space, a communication pipe that connects the liquid parts of the steam generation tank and the liquid receiving tank, and a reverse pipe that is interposed in this communication pipe and allows flow only from the liquid receiving tank to the steam generation tank. A diffusion absorption refrigerator consisting of a stop valve.