JPS6026806Y2 - air separator for water heating equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to an air separator for hot water equipment, and is installed at the outlet of a hot water heating equipment such as a hot water boiler, i.e. immediately after the water is heated, to efficiently remove supersaturated air from the hot water. The purpose is to provide an excellent air separator that can perform vaporization and separation well.

■ The air separator of prior art water heating equipment is installed in the middle of piping, and while hot water flows into and out of it, it uses the buoyancy of air bubbles to
It discharges only air bubbles out of the piping, and it is desirable to install it at the outlet of a boiler or the like immediately after heating, at a position where air has the lowest solubility in water.

This is because the temperature of the hot water is highest at the outlet of the boiler, etc., and the pressure is lowest just before the pump, so this is the most suitable location for separating supersaturated air. This is because air bubbles can cause problems such as air locks or corrosion in equipment such as pumps and radiators, or piping located downstream of the flow.

Therefore, as a result of detailed research into the separation state to find out whether the bubbles could not be completely separated at the boiler outlet, we developed a separator 14 that lowers the flow rate of hot water and has a stagnation chamber 12 to separate the bubbles, as shown in Figure 1. The conclusion was reached that there is almost no separation effect at the boiler outlet.

In other words, as cold and hot water flows in from the inlet of a boiler, etc., and is heated there and leaves from the outlet of a reboiler, etc., the solubility of air dissolved in the cold and hot water decreases in the hot water. First of all, it exists in a supersaturated state.

However, this supersaturated air cannot diffuse because there is no gas phase at the outlet of the boiler, and even if it is still flowing in laminar flow or turbulent flow, its passage time is short, so that It was found that only a small amount could be vaporized and separated into bubbles, and the rest passed through the air separator in a supersaturated state.

That is, the conventional method of lowering the flow rate should be specifically called a bubble separator, and has almost no effect on vaporization separation at a position where supersaturated air is not vaporized and separated.

Therefore, in order to efficiently vaporize and separate supersaturated air at the outlet of the boiler, the inventor of the present invention created an air chamber in the air separator.
A hot water inlet was opened in this air chamber, and the hot water that flowed into the air separator from the hot water inlet first passed through the gas phase, and then fell and collided with the hot water surface, successfully vaporizing and separating the supersaturated air.

The air chamber of this air separator is large enough that the air accumulated in it can pass through the air for a certain amount of time, i.e., for the time it takes for most of the supersaturated air to diffuse and vaporize from the hot water into the air. It must be formed in a shape that prevents hot water from flowing out along the flow until it exceeds the temperature.

That is, during air separation, a certain amount of air is always stored, and supersaturated air is vaporized and separated by contact with air as it falls through this air chamber, or by the impact when falling into hot water.

For this reason, the air chamber must be at a certain height or higher, and the hot water must fall within the air chamber for a certain period of time and receive an impact.

By the way, in an air separator, air mixed with hot water is sent in and is separated from the hot water, so the amount of air stored in the air chamber cannot be controlled to a constant amount unless it is adjusted in some way.

By opening the air chamber to the outside and adjusting the amount of water supplied to the air separator, the amount of air stored in the air chamber can be controlled within a certain range.

However, air separators used in hot water equipment are often used in situations where hot water is continuously flowed in, such as in hot water heating systems, and the supply amount cannot often be adjusted. Since the pressure inside the separator is higher or lower than atmospheric pressure, it cannot be opened to the outside.

Therefore, it is not possible to control the amount of air by adjusting the amount of hot water supplied, as in the past.

By the way, as an aeration removal device for removing gas contained in water, a device that injects liquid into the air has been developed.

(Japanese Patent Publication No. 47-27288) In this aeration removal device, an air vent pipe is inserted into the inside of the casing to discharge air.

The air vent pipe extends downward from above, has a lower end opened midway between the upper and lower parts of the casing, and has an air vent valve attached to its upper end.

When air flows in and the liquid level falls, thereby opening the lower end of the air vent pipe into the air within the casing, the air vent valve opens and the air is discharged.

When the air is discharged and the lower end of the air vent tube is immersed in water, the air vent valve is closed and no liquid is discharged.

By repeating this operation, the liquid level within the casing is maintained within a certain range.

However, this type of aeration device cannot prevent some water from being sucked into the air vent pipe together with the air, and it is also impossible to completely separate this water using the air vent valve. It has the disadvantage that it easily leaks.

For equipment that is mainly installed outdoors, such as an aeration equipment, water leakage during operation is not such a big problem.

However, like the air separator for hot water rails devised in this application,
Those installed indoors cannot be put to practical use unless water leakage is completely prevented.

The problem is that when water is injected into the air to aerate or separate air and water for the purpose of increasing separation efficiency, countless minute bubbles are created on the water surface where the fountain falls, and these bubbles are created one after another. The falling water disperses it into even finer bubbles, so when the air is removed from the water surface, the water is inhaled along with the air.

This water flows into the air vent valve along with the air through the air vent pipe.

There was a drawback that air and water could not be completely separated within the air vent valve, causing water to leak along with the air.

Furthermore, in this aeration device, the overall shape of the casing is formed into a cylindrical shape extending vertically, and an air vent pipe is extended at the bottom of the air chamber.

When this structure is used in an air separator, air cannot be separated under ideal conditions.

This is because, although it is important for the air separator to vaporize the gas contained in a supersaturated state, it is also important to make the vaporized air bubbles grow large and quickly separate them from the liquid.

Moreover, in terms of mounting location, unless the overall shape is downsized and the above-mentioned characteristics are satisfied, there will be significant restrictions on where it can be used.

A vertical cylindrical casing with an air reservoir at the top that sprinkles ice inside the casing, air bubbles accumulate on the water surface, and the water sprayed here breaks the air bubbles near the water surface into fine particles, causing them to become larger. There was a drawback that fine air bubbles could not be separated sufficiently unless the overall shape of the casing was made considerably large.

■Purpose This device was developed to further eliminate this drawback.The important purpose of this device is to vaporize and separate supersaturated air, in addition to being able to very effectively separate the air contained in hot water. The amount of air stored is controlled by a simple mechanism,
To provide an air separator that can always efficiently separate supersaturated air.

■Configuration Hereinafter, embodiments of this invention will be described based on the drawings.

The air separator 1 shown in FIG. 2 has an L-shaped overall shape, and an air vent valve 7 is connected to the middle between the upper and lower parts, that is, the upper surface of the body 5, and this air vent valve 7 discharges only air. Accordingly, an air chamber 3 is provided above the connection point of the air vent valve 7, a hot water outlet 2 is opened at the upper end of the air chamber 3, and a hot water outlet is opened at the seat of the body.

The air vent valve 7 is arranged near the end of the shell 5, away from the air chamber 3, so that the air bubbles flowing together with the water can grow there and then flow into the shell.

That is, the hot water flowing into the air chamber 3 passes through the air chamber 3 and falls onto the hot water surface 4, where small air bubbles are generated.

The small air bubbles grow large while flowing through the shell 5 together with the hot water and flow into the air vent valve.

■Operation When this air separator 1 is installed and not enough hot water is flowing in, the air chamber 3 is also filled with hot water, and the hot water from the boiler etc. is transferred from the hot water population 2 to the air chamber. Flows into 3.

At this time, a small amount of vaporized and separated air is present in the hot water, which accumulates in the air chamber 3 one after another, and the remaining supersaturated air is carried away by the hot water without being vaporized.

As air accumulates in the air chamber 3 over a certain period of time, the supersaturated air in the hot water vaporizes into the gas phase due to diffusion as the hot water flows through the air, and the amount of air in the air chamber 3 increases. rapidly increasing.

On the other hand, supersaturated air that could not be vaporized while passing through the air chamber 3 flows as hot water and falls onto the hot water surface 4 at the bottom of the air chamber 3.

At this time, the hot water is in the form of particles, and when this collides with the hot water surface 4, the supersaturated air is vaporized and separated by the impact, forming fine bubbles and flowing into the hot water.

In this way, when the air vaporized in the air chamber 3 exceeds a certain amount, it forms an air mass from the bottom of the air chamber 3 as shown in FIG. 2 and reaches the ceiling inside the body 5 of the air separator 1. The air flows along the air line toward the air vent valve 7, where it is discharged.

On the other hand, the air that bubbles and flows into the warm water floats up while flowing through the shell 5 and heads toward the air vent valve 7, where it is discharged.

In this way, bubble-free hot water exits from the hot water outlet 13 of the air separator 1.

At this time, as shown in FIG. 3, a collision plate 8 is provided immediately after the hot water inlet 2 to impact the inflowing hot water and scatter the hot water, thereby reducing the contact area with the gas phase in the air chamber 3. Increasing the size brings about a greater vaporization separation effect in the present invention.

In addition, the flow of hot water is connected to the air chamber 3 as shown at 11 in Fig. 3.
A mechanism that averages the inside (e.g. a plate with many holes)
This further improves the effect of the present invention.

■Effect a The air separator according to this invention has an L-shaped overall shape, and has a hot water inlet in the vertically extended air chamber, a hot water outlet in the end of the body, and An air vent valve is connected to the upper surface of the horizontally extended body at a location separated from the air chamber.

Due to this structure, the connecting point of the air vent valve can be placed far away from the hot water falling surface.

Therefore, the fine air bubbles generated when the hot water supplied to the air chamber falls are not immediately exhausted after that, but flow through the barrel together with the hot water, grow large during this process, and then flow into the air vent valve.

Water is completely separated from the large air bubbles that flow into the air vent valve, and only air can flow into the air vent valve.

Therefore, even though hot water is injected into the air and countless bubbles are generated on the surface where the hot water falls, water leakage from the air vent valve can be minimized.

The hot water that flows into the air chamber always falls through the air chamber at a certain height and evaporates into the gas phase by diffusion, and when the supersaturated air that is not vaporized strongly collides with the hot water surface at the bottom of the air chamber. It is here that the gas is shocked into microscopic bubbles and vaporized.

Microscopic bubbles generated at the bottom of the air chamber are fed into the barrel, grow into large bubbles as they flow through the barrel, and are smoothly exhausted from the air vent valve.

In addition, at this time, the microbubbles generated on the water surface at the bottom of the air chamber are sequentially flowed horizontally toward the hot water outlet and do not stagnate, and are not fragmented by the hot water falling one after another, but are transferred horizontally. It grows big and can be exhausted smoothly.

That is, by forming the overall shape into an L-shape, the bubbles are prevented from being fragmented, and the bubbles are accelerated to grow and quickly evacuated.

For this reason, the overall shape is made smaller and extremely effective separation of supersaturated air is achieved.

b Furthermore, an air chamber is provided in a part of the closed air separator, and since the hot water flows out through this air chamber, noise such as vibrations generated by the boiler etc. propagating through the hot water can be removed from the air. It also has the feature of being blocked in the room and not propagated to the next place.

Furthermore, since the air vent valve is connected in the middle of the upper and lower parts to exhaust air, the air separator can be closed and the product can be used at temperatures above atmospheric pressure.
It also has the feature of being usable in closed circuits such as hot water heating.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional air separator, Figures 2 to 3
The figure is a sectional view showing an embodiment of the present invention. 1...Air separator, 2...Hot water inlet,
3... Air chamber, 4... Warm water surface, 5...
...Body, 6...Air mass, 7...Air vent valve, 8...Collision plate, 9...Air separator, 11... ...Averaging mechanism, 12...
Stagnation chamber, 13...Hot water outlet, 14...Air separator.

Claims (2)

[Scope of utility model registration request] (1) An air separator for a hot water system in which an air chamber in which a predetermined amount of air is accumulated is arranged and a hot water inlet is disposed in the air chamber, and the overall shape is L-shaped. The part that extends vertically becomes the air chamber, and an air vent valve is connected to the top surface of the horizontally extending body away from the air chamber.The air vent valve exhausts the air in the air chamber and lowers the liquid level. An air separator in which the temperature is adjusted within a certain range and a hot water outlet is opened at the end of the body. (2) An air separator for a hot water system according to claim (1), which is a utility model, and has a collision plate disposed in the air chamber at an appropriate distance from the hot water inlet.