JPS5848526Y2 - Absorption refrigerator water heater - Google Patents

Description

[Detailed description of the invention] This invention relates to a water heater for an absorption chiller. Even if the drain liquid level in the water heater fluctuates due to load fluctuations, a steam space is secured over almost the entire length of the water heater, and the drain liquid level is kept free of liquid. The purpose of this is to prevent the occurrence of water hammer noise by making it a surface.

When heating is performed using a water heater attached to an absorption chiller and its heating capacity is controlled by controlling the amount of drain in the water heater, the drain in the water heater changes in a range from zero to full depending on load fluctuations.

When the load fluctuates rapidly, or when the drain control valve that controls the drain level in the water heater changes from fully closed to fully open, the water pressure inside the water heater changes rapidly, causing the drain level to fluctuate sharply. .

If the drain liquid level of the water heater is closed due to this fluctuation in the drain liquid level, drain parts and steam parts will be formed alternately, causing a water hammer effect.

Furthermore, if the number of refrigerant vapor inlets of the water heater is small or small, the refrigerant vapor tends to pass through the space above the hot water and condense, which further promotes fluctuations in the drain liquid level.

This proposal was made in view of the above points, and to explain the embodiment shown in the figure of Hiroshita's proposal, 1 is equipped with a combustion heating chamber 3 and heat exhaust pipes 4, 4, etc. of the heating chamber in the liquid storage section 2. A refrigerant generator heats and separates refrigerant vapor from a diluted liquid, and an absorption refrigerating machine main body (not shown) is connected to the generator.

Reference numeral 5 denotes a water heater installed on the water surface, and is connected to the refrigerant generator 1 through a steam conduit 6 and a drain pipe 8 having a drain control valve γ.

The water heater 5 has a plurality of heat transfer tubes 10, 10 that allow water to flow through a horizontally installed cylindrical horizontally elongated water heater side 9.
. . , and a large steam chamber 11 is formed on the upper outer surface of the water heater side 9 to extend approximately the entire length, and the steam chamber and the water heater side 9 are connected to each other.
The upper space 12 inside is communicated with by steam introduction holes 13, 13.13 provided in the longitudinal direction over substantially the entire length of the top of the steam barrel wall.

The steam introduction hole 13 may be a single elongated hole extending substantially over the entire length of the steam barrel wall.

Both ends of each of the heat transfer tubes 10, 10... are supported by a tube plate 14.14 provided at the end of the water heater side 9, and the tube plate 14.14 has an inlet chamber 15 and an outlet chamber 16 for hot water. A cover plate 17, 1γ is attached.

The operation will be explained regarding the above-mentioned stealing.

First, when the refrigerant generator 1 is heated by combustion of gas or oil, refrigerant vapor is separated from the replacement liquid in the liquid storage section 2 by heating.

This refrigerant vapor passes through the steam conduit 6, covers the steam introduction hole on the upper outer surface of the water heater 5, passes through the steam chamber 11 formed by a box-shaped wall extending over the side wall on the water heater side, and passes through the steam introduction hole. 13, 13° 13 and flows into the upper space 12 on the water heater side 9.

Then, the refrigerant vapor is transferred to the heat transfer tube 10°10 in the water heater side 9.
・Exchanges heat with the water to heat the water flowing inside, turning it into hot water, while the water itself condenses and liquefies, becoming drain and flowing downward.

On the other hand, the hot water temperature in the water heater 5 is controlled by adjusting the drain liquid level in the water heater side 9.

That is, a temperature detector 19 is provided in the hot water outlet pipe 18 of the water reservoir 5, and a signal from this detector is used to control the temperature controller 20 to open and close the drain control valve γ. When the temperature becomes higher than the set value, the drain control valve 1 is closed to raise the drain liquid level in the water heater side 9, reducing the heat exchange area between the steam and the heat transfer tubes 10, 10, and vice versa. If it becomes lower, the drain control valve γ is opened to lower the drain liquid level, and the steam and heat exchanger tubes 10, 10...
・Increase the heat exchange area.

In this way, even if the drain liquid level changes due to fluctuations in the hot water load, the upper space 12 in the water heater side 9 of the present invention allows steam to flow through the steam introduction hole 13 provided over almost the entire length of the water heater side 9 in the longitudinal direction. Since the steam chamber 11 is communicated with the chamber 11 under the same power conditions and is formed of a wall extending to the side wall of the water heater side 9, the condensate does not ripple or oscillate within the steamer barrel. Even if the liquid level fluctuates greatly, the liquid level in the drain is maintained as a free liquid level with the upper surface open, and steam is not trapped between the liquid level in the drain and the wall of the water heater side 9. After the drain part and the steam part are formed alternately in the upper space of the water heater side 9, the sandwiched steam part suddenly flows toward the steam chamber 11, resulting in the water hammer effect and water hammer sound. do not.

Furthermore, even when a large amount of condensate is temporarily generated due to a sudden stoppage of condensate flowing out or a large amount of condensate is temporarily generated and fills the inside of the water heater side 9, the condensate flows through the steam introduction hole 13 into steam. The water overflows into the chamber 11, and a steam space is always created at the top of the water heater side 9, which is secured as a free liquid level. A water heater with a simple steam chamber on the top of the water heater side, for example, has a structure where the top wall of the water heater side is sloped and the steam chamber is formed on the side of the water heater. This greatly increases the effectiveness of preventing outbreaks.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the main parts of the proposed water heater, and Figure 2 is the ■ of Figure 1.
-H is a main part sectional view corresponding to H. DESCRIPTION OF SYMBOLS 1... Refrigerant generator, 6... Steam conduit, γ... Drain control valve, 9... Water heater side, 11... Steam room, 13
...Steam introduction hole.

Claims (1)

[Scope of utility model registration request] , a refrigerant generator that heats and separates refrigerant from a dilute liquid using an external heat source is installed horizontally on the side of an oblong water heater with multiple heat transfer tubes installed, and a steamer barrel containing refrigerant vapor from the generator is installed above the water heater side. A drain pipe with a drain control valve is provided at the bottom of the water heater, which is connected to the side wall of the generator. A steam chamber is provided on the outer surface above the steam introduction hole, and is formed of a wall that covers the steam introduction hole and extends across the side wall on the water heater side. A water heater for an absorption refrigerator, characterized in that the water heater space is connected to the water heater through the steam chamber and the steam introduction hole.