KR100432197B1 - Hot water circulating device for circulating hot water while removing air by adopting valve having valve ball and valve body - Google Patents

Abstract

PURPOSE: A hot water circulating device is provided to improve the heat efficiency of a hot water boiler and a small oil burner heating system by removing vapors in water and enhancing heat conduction through via water. CONSTITUTION: A blower(7) or a flue(8) is connected to an outlet(1). A valve(5) consisting of a valve ball(4) and valve bodies(3) is mounted in a pipe(12) through which hot water flows to the upper portion of a boiler(11). Vapors in the hot water are expanded by the low pressure generates by the ventilation of the blower or the flue and the action of the valve and are emitted to the atmosphere.

Description

Hot water circulation system

In the hot water heating, the heating medium (mainly water) is heated and circulated through a series of heat generators and heat dissipation systems to heat using heat transfer.The heated hot water in the hot water heating tank in the boiler body is circulated through natural convection through piping. Convection conduction of the heating medium in hot water heating tanks and heating pipes when a forced circulation motor is installed when it is circulated to the force (natural circulation in the pipe due to the density difference of the water obtained from the temperature difference of the hot water) and needs to further promote the circulation. Heat transfer takes place in the form of. Heat transfer is transferred from high to low between the heat medium. In addition, it is made between the heat medium and the heating pipe (iron and copper pipes and F.C hose), the heat exchange is performed in the ondol and the radiator. The present invention relates to a hot water circulation device for circulating hot water while removing air in the heat medium (water).

In the heat dissipation system (Fig. 2) by the briquette fueled hot water boiler, which appeared from around 1960, heating is achieved by natural convection circulation and heat conduction through heat medium, and the thermal conductivity of the gas is significantly lower than that of liquids and solids. By removing as much of the air in the tank and the heating pipe as possible, the thermal conductivity of the heat medium circulated is increased to increase the thermal efficiency of heating. In addition, when the air contained in the heating medium at room temperature is heated, it becomes a bubble and is released from the water to be located at the highest point of the piping system, thus preventing the circulation of the heating medium. Therefore, when constructing the heating pipe to release the air of the heating radiant system, when installing the heat pipe (hot water pipe) of the ondol, install the slope so that the air flows in the flowing direction of the hot water and discharge the air naturally. Air emitters are installed in the system (manufactured in a structure having the function of air discharge at the highest point of the main line between the boiler's water duct and the water supply main line). It is better to install a drain valve.

In order to discharge the air in the heating medium and the air collected in the pipeline, the heating medium (water) is continuously supplied to the water supply tank in the hot water boiler system of FIG. 2, and the water passes through the hot water heating tank in the boiler to drain the air. When the manual shut-off valve 9 is closed to drain through the water tap 10 and the air tap 10 for bleeding is opened, the air collected in the pipeline and the air contained in the heat medium are discharged by the water pressure of the water in the water supply tank. It is pushed down to the water and the air is discharged with the water to the water main pipe-the hot water pipe-the water return pipe-the water return pipe-the boiler-the water pipe-the water conduction (10) in the direction of the arrow.

In the small oil heater radiator system as described above, the air contained in the heat medium and the air collected in the pipeline are discharged through the drain valve for bleeding air while continuously supplying water to the water supply tank. It is difficult to remove the air by air, and the drainage valve for bleeding air is installed in the pipeline located in the uppermost part of the unit heating place, so that when the hot water is heated, the volume and lighter air open the valve. Are released together. Air valves may be installed at elevated points in the pipeline to automatically exclude air separated from hot water.

References: A Study on the Establishment of Hot Water Ondol Design Criteria, Korea Research Institute of Power and Resources (1978)

In this way, it is very inconvenient to remove the heat medium and the gas in the pipeline, the construction of the piping is difficult, and it is impossible to completely remove the air, and it is not easy to remove the air only by the air bleeding valve in a large heating system.

In addition, it is preferable to install and operate a water separator to prevent air from being introduced into the heat exchanger that performs heating and hot water supply. As a method of separating air bubbles using a density difference between water and air, air bubbles are used. It is difficult to separate it from hot water and discharge it into the atmosphere outside of the heating system, so that the separation effect of the water is insufficient and the separation of air bubbles is enough to achieve the improvement of thermal conductivity. Although there is a device that separates bubbles by using centrifugal force, there is a problem that is difficult to apply to domestic hot water boiler due to the enlargement of the device, and also there is insufficient point to achieve breakthrough heat conduction improvement in hot water heating.

The purpose of the present invention is to provide a self-circulating force generated by the expansion of the low pressure and the volume of heated hot water generated at the inlet of the blower using an electric motor, and a valve designed separately to the pipe so that the action of the valve and By removing as much of the air contained in the heated hot water as possible as possible significantly increases the thermal conductivity and facilitates the circulation of hot water. In addition, the difference between the atmospheric pressure generated by the exhaust gas temperature and the communication height in the communication connected to the boiler combustion device, and the self-circulation force and the action of the valve to remove the air to increase the thermal conductivity and facilitate the circulation of hot water Let's do it.

The present invention has been devised in view of the conventional problems, and aims at maximizing efficiency as a compact and simple device by effectively removing a large amount of air bubbles under a low pressure state rather than a conventional atmospheric pressure and a pressurized state. In the case of a large boiler heating system, the heating medium (water) from which the air produced in the above apparatus is removed is supplied to the water supply tank, thereby increasing the thermal efficiency of the heating system.

Figure 1 is an illustration of connecting the hot water circulating device to the hot water pipe and the boiler by connecting the blower to the exhaust port of the exhaust pipe connected to the water supply main line of the boiler designed separately and circulating the hot water.

Figure 2. Piping diagram for supplying water to the water supply tank in the conventional briquette hot water boiler system to release the air collected in the pipe.

3. Top and elevation views of a separately designed valve.

5. A perspective view of the valve.

Figure 4 is an illustration of connecting the communication to the exhaust port and operating the hot water circulation device to circulate the hot water.

(Explanation of symbols for the main parts of the drawing)

1. Exhaust port 2. Plug 3. Valve port 4. Valve hole

5. Stop valve (do not let the valve ball descend from the valve)

6. Water supply tank and expansion tank (hereinafter referred to as water supply tank)

7. Blower 8. Communication 9. Manual open / close valve

10. Drain valve to release air (water tap) 11. Boiler

12. Main line 13. Air bleeding water tap 14. Manual open / close valve

By connecting the blower to the exhaust port (1) (FIG. 1) and installing a separately designed valve (FIG. 3) in a pipe (near the main line connected to the water inlet) where hot water rises upwards, The hot water circulates while being heated and circulated by blocking or opening the valve port 3 by vertically moving the valve hole 4 of the valve by the self-circulating force due to the low pressure and the difference in density of the hot water caused by the difference between atmospheric pressure due to the ventilation force. This increased hot water rises upward from the pipe (main line) connected to the upper part of the hot water heating tank (water supply port), and air is discharged to the atmosphere from the hot water surface, and the volume is increased due to the low pressure caused by the ventilation force of the blower and the communication. Is promoted to the atmosphere. The hot water is removed from the hot water surface and passes through the valve opening in the opening of the valve opening, proceeds in the direction indicated by the arrow, passes through the heating piping, and after the temperature decreases due to heat transfer between the heating medium and the heating piping, it is connected to the bottom of the hot water heating tank again. Proceed to the return pipe.

At this time, the valve hole (4) is made of a material with a specific gravity is lighter than water to float in the water by buoyancy, blocking the holes of the valve port (3), the pipe is connected to the upper water inlet of the boiler is heated hot water is expanded volume (main line Because of the low pressure at the inlet of the blower, the air contained in the hot water is a gas, so the volume becomes larger and the hot water rises more upwards. At this time, the heated and expanded air bubble on the surface of the hot water rises lighter and is discharged to the atmosphere outside the hot water surface due to the specific gravity difference between water and air in the hot water. Will be further promoted. In the state of steam on the hot water surface, steam rises to the upper part of the exhaust port, and the upper part of the exhaust port condenses and flows down because the air temperature is lower than the lower part. It will be discharged to the outside.

At this time, the density of the hot water raised to the upper part becomes higher as the volumetric air is released, and the condensed water is also lowered, and the weight of the hot water in the upper part becomes larger than the force pushing up the valve ball, so that the valve ball 4 Will go down. Since the opening of the valve port 3 is thus opened, hot water from which air is removed to some extent passes through the valve port 3 and proceeds in the direction of the arrow, and the valve hole 4 stops at the valve stop 5.

After the hot water passes through the valve hole to some extent, the valve ball floats again with buoyancy, and the volume expands and becomes lighter and rises above the main line, so that the valve hole does not pass through the valve hole, thereby blocking the hole of the valve hole. When the hole of the valve port 3 is blocked, the heated and expanded hot water rises above the main pipe line as described above, and the air bubble is released into the atmosphere due to the specific gravity difference between the water and the volume of the air. In the low pressure state, the release of air bubbles is further promoted, and if there is a difference between the weight of hot water raised to the upper part where air is removed and the buoyancy force pushing up the valve ball, the valve hole 4 is lowered to open the hole of the valve hole. The hot water proceeds in the direction of the arrow. Since this action is repeated, hot air is circulated as air bubbles are removed.

Refer to Moon Dae-young's dissertation, "A Study on Nuclear Boiling Heat Transfer at Pressures Under Atmospheric Pressure," in 1989. When the hot water boils at subatmospheric pressure, the air bubbles increase in the low pressure and the diameter of the bubbles before and after. It is observed that there is a sudden rise in the liquid while swinging from side to side, and when the bubble rises rapidly and the pressure decreases, it can be observed that the change in the rise velocity of the bubble is large at low heat flow rate. Since the release into the atmosphere is accelerated even more than at atmospheric pressure, air bubbles are released in the hot water rising above the main line under low pressure, and the hot water is moved again and air bubbles are continuously released.

At this time, if the stopper of the water supply tank 5 is sealed, the atmospheric pressure does not act on the water in the water supply tank. After rising above the main line, the weight of the hot water from which air bubbles are removed to some extent is greater than the force pushing up the valve hole. The ball comes down and the hole in the valve opening opens. (If the stopper is not sealed, the atmospheric pressure acts on the water in the water supply tank, which increases the force pushing up the valve ball, so that the valve ball does not fall to the bottom and the hole in the valve port is not opened and closed smoothly.) Since it proceeds through the valve port (3) to seal the stopper of the water supply tank.

The height of the water supply tank is set higher than the position of the valve, and the height is adjusted so that the opening and closing of the valve hole of the valve port is smoothly operated and the hot water is circulated smoothly.

The valve designed separately is configured as shown in (Fig. 3) and the valve port 3 is made of a rubber material and can be made of a stainless steel material that does not form rust. In this case, the cone hole of the valve port is smoothly manufactured. The valve ball made of plastic or solid wood round ball floats in water and its heat resistance temperature is 120 degrees Celsius or more, so it uses materials that do not deteriorate even in high temperature water for a long time. The valve stop (5) is located at the bottom right of the valve port (3) to stop the valve hole (4) so that the hot water does not move with the hot water as it moves downward. This valve should be positioned vertically from the top to the closest position to the pipe (main line connected to the inlet) from the hot water tank to the exhaust. The valve is made of a transparent fever sea hose with good heat resistance, so that the operation of the present invention can be observed by observing the vertical movement of the valve ball and the progress of hot water. (See Figures 3 and 5.)

The blower can be directly connected to the exhaust port (1), and can be used by connecting the exhaust port (1) to the communication and using the gas discharger connected to the top of the communication with the blower roll. The device of the present invention is activated by the action of the circulation force and the valve. As shown in FIG. 4, the device of the present invention operates only by the action of a low pressure and a self-circulating force and a valve caused by a ventilation force generated in a communication without using a blower.

This device can be used in solar hot water generator as it works in hot water boiler, and conversely collect hot water from FBC sea hose pipe that absorbs solar heat and collect in hot water tank as opposed to hot water boiler. In solar hot water generators, it is used as an on-tank for collecting hot water heated by solar heat. The removal of air bubbles at the exhaust port of the hot water circulator allows the heat transfer from the hot water pipe to the water to be facilitated and the circulation of the hot water is facilitated as in the hot water boiler.

Hereinafter, the preferred embodiments will be described with reference to the accompanying drawings. The separately designed valve described in FIG. 3 heats the transparent F.C hose with an alcohol lamp to make it elastic, and then widens the inner diameter of the hose. Next, make a valve made of rubber material, make a conical hole, and push it into a hose with a wide inner diameter to make it completely close. To make valve stopper parts with wire type, insert them into the valve and install the valve as shown in Fig. 1 and Fig. 5, and put the valve into the steel pipe and wrap it with rubber band to close the air and exhaust the air collected in the pipeline. Water is continuously supplied to the water supply tank in the manner of (Fig. 2) to discharge the air collected in the pipeline by their water pressure. Shut off the manual shut-off valve, release the air, and open the manual shut-off valve and drain the water to the tap before operating the device of the present invention.

The stopper (2) of the water supply tank is completely closed or covered with vinyl, and then sealed with a rubber band. The coal briquette hot water boiler should be put into the coal briquette to start combustion. At first, there is no need to operate the blower (commercially used gas discharger), which means that the heat from the hot water heating tank in the boiler transfers the heat to the hot water pipe quickly. As a result, the temperature of the boiler combustion vessel is lowered so that briquette combustion does not start smoothly (the briquettes are turned off). If the combustion of briquettes does not start smoothly, briquettes that have sufficiently started briquetting are taken from another boiler. When the combustion of the briquettes is completely started, the gas discharger is operated to operate the low pressure and self-circulating force in the blower, and the air bubbles are removed by the action of this valve.The heated hot water is circulated. You can observe the opening of the valve by closing the ball and then lowering the valve hole. Since the hot water evaporates more by the low pressure of the blower, the water tank should be refilled more frequently than the conventional briquette hot water boiler. (Conventionally, once a week, once per day in the present invention, once connected to the communication and exhaust port as shown in Fig. 4) and the ventilation force generated by the high-temperature combustion exhaust gas and the communication height generated during the combustion of briquettes and The device of the present invention works only with its own circulation.

By using the apparatus of the present invention, the consumption of briquettes can be reduced by 1/2 compared to the conventional hot water boilers. In the case of using, carbon dioxide ratio is one sheet per day. In case of using a blower (gas exhauster), it becomes very hot when heating, so it is possible to achieve comfortable heating by using only the ventilation power of the communication without the blower.

When using the device of the present invention, it was possible to detect that the hot heat radiated from the ondol room during heating was slightly different from the radiant heat from the ondol room when heating using a conventional hot water boiler, which is because the number of water molecules per unit volume increases. The difference in the thermal motion of the molecules is considered to be a problem to be studied. (Because the ratio of air and air removed from air bubbles is different, it seems to have a difference, which is also a problem to be studied from an Asian perspective.)

Since the air bubbles are removed at the low pressure generated by the blower, it is easy to remove the air bubbles above about 3% of the air contained in the water at room temperature, which is different from the physical data. It is possible. Furthermore, if there are unknown particles in the empty space between water molecules in the liquid state of water, the removal of such particles can be expected, so it is a problem to be studied.

When the FBC sea hose is used in the hot water pipe for heating during the implementation of the present invention, the durability of the FV sea hose may be reduced when it is used for a long time, and it is considered that it is preferable to use iron and copper pipes as the hot water pipe.

-As air bubbles in the heat medium (water) are removed, the hot water circulates and heat conduction through the water increases, so the thermal efficiency is significantly increased in the hot water boiler for briquettes and the heating system for small oil combustion.-In the case of a large oil heating system, the present invention By supplying the water from which the air produced by the device is removed to the water supply tank, the thermal efficiency of heating is increased by increasing the heat conduction of the heat medium-It can increase the thermal efficiency of attachment to the solar water heater-By removing the large amount of air bubbles, This reduces the corrosion caused by oxygen and extends the service life of boiler flues and heating system piping. -The material of the pipe of the circulation device is made of sanitary steel or silver pipe, and the water produced in this device is used for food cooking. (The nutrients of food are dissolved well in the foreign material.)-Distilled water in the water supply tank of the device of the present invention. The deaerated distilled water is used to produce and develop chemicals.

Claims (1)

Connect the blower or the communication to the exhaust port (1) and install a new valve consisting of a valve hole (4) and a valve port (3) in the pipe in which hot water rises up the boiler (Fig. 3, Fig. 5). Hot water circulation system to circulate hot water while removing.