KR20100109441A - Energy saving boiler - Google Patents

Abstract

PURPOSE: A fuel saving boiler is provided to enable long-time heating with minimum fuel by supplementing heat from a heat storage core to heating water. CONSTITUTION: A fuel saving boiler comprises a water storage part(10), a burner(1), a heat storage core(40), a thermal medium storage part(20), and a thermal medium radiating coil(15). The water storage part comprises a heat exchanger and heating water. The burner burns a fuel to supply hot air. The heat storage core has hot air passage holes in order to heat the heating water even when the burner is stopped and the rest solid structure for absorbing and accumulating the heat from hot air. The thermal medium storage part contains thermal medium oil which is heated to the temperature higher than the boiling point of the heating water. The thermal medium radiating coil is provided with the thermal medium oil and transfers heat to the heating water of the water storage part.

Description

Fuel saving boilers

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler, and more particularly, to a boiler for reducing fuel consumption by using a metal heat storage core and a heat medium.

Conventional oil boilers are those that save fuel by increasing the heat exchange area or by renewing the shape or material of the heat exchanger to increase efficiency.

In addition, the conventional oil boilers were of a type that uses the heat of heat medium that can be elevated at a high temperature.

However, the above conventional boilers, although somewhat effective in reducing the use of fuel, does not significantly reduce the amount of fuel used.

The present invention has been made to solve the problems of the prior art, an object of the present invention is to provide a boiler that reduces the amount of fuel used by continuously accumulating the maximum amount of heat generated during combustion of the fuel.

The object of the present invention is a heat exchanger is formed therein and the water storage unit for storing the heating water for heating therein, a burner to burn the fuel to supply hot air, and even when the combustion of the fuel of the burner is stopped It is formed of a metal material to heat the heating water, a hole through which the hot air introduced from the burner passes is formed, and a portion except the hole is formed of a solid structure filled inside to absorb and accumulate heat from the hot air. The heat storage core is formed adjacent to the metal heat storage core and the heat storage core receives heat from the metal heat storage core and is connected to the heat storage body, and is connected to the heat storage unit. Including a heat radiation coil to transfer heat to the heating water of the negative, the heat Wind is supplied to the heat exchanger of the water reservoir to achieve a fuel saving boiler that heats the heating water.

In order to achieve the above object, the hole of the metal heat storage core is composed of an entry hole and a discharge hole, and the hot air supplied from the burner passes through the metal heat storage core through the entry hole and then again through the discharge hole. It is preferable to pass the said metal heat storage core.

The water preheating unit is connected to the water storage unit to store a portion of the heating water, and is located adjacent to the metal heat storage core to receive heat from the hot air passing through the metal heat storage core to heat the heating water. It may include.

Further, in order to heat the heating water by using the heat accumulated in the metal heat storage core even after the combustion of the fuel of the burner is stopped, when the heating water is heated and reaches a set temperature, combustion of the fuel of the burner is started. Stop and operate to start circulation of the heat medium oil from the heat medium storage unit to the heat radiation coil when the temperature of the heating water is lower than another set temperature lower than the set temperature at which combustion of the fuel of the burner is stopped. It is desirable to.

The boiler according to the present invention can heat a metal heat storage core to a very high temperature, and thus can accumulate a large amount of heat. In addition, heat is stored in both the metal heat storage core and the heat medium, and the metal heat storage core is heated to a higher temperature than the heat medium, so that the heat storage means can raise the heat medium to a high temperature. Therefore, heating is possible for a long time even when the operation of the burner is stopped.

In the boiler of the present invention, since the heating water is heated in advance in the water preheating unit before the heating water is heated in the water storage unit, when the heating is started, the temperature of the heating water can be raised to a temperature suitable for heating in a short time.

1 is a cross-sectional view of a fuel-saving boiler according to a preferred embodiment of the present invention,
Figure 2 is a perspective view briefly showing the internal configuration of a fuel-saving boiler according to a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the configuration of a fuel-saving boiler according to a preferred embodiment of the present invention.

1 is a cross-sectional view of a fuel-saving boiler according to a preferred embodiment of the present invention, Figure 2 is a perspective view briefly showing the internal configuration of a fuel-saving boiler according to a preferred embodiment of the present invention. 1 and 2, the boiler having a metal heat storage core 40 according to the present invention is a water storage unit 10, a burner (1), a metal heat storage core 40, a heat medium storage unit 20 ) And the water preheating unit 30.

The water storage unit 10 has heating water stored therein and a heat exchange pipe 11 for heating the heating water is formed. The heat exchange pipe 11 is connected to the gas discharge pipe 12 opened to the outside to discharge the combustion gas to the outside of the water storage unit 10. The electric heater rod 13 for heating the heating water is installed in the water storage unit 10. Inside the water storage unit 10 is connected to the heat medium storage unit 20 to be described later is formed a heat medium heat radiation coil (15) circulating the heat medium. The water storage unit 10 includes a heating water discharge pipe 18 for discharging the heating water to a space for heating and a heating water inlet pipe for heating the water in the heating space and returning to the water storage unit 10 (19). ) Is formed. In the water storage unit 10, the hot water heating tube 50 is installed so that the water is introduced into the water storage unit 10 to heat the water to be used as the hot water, and then discharged to the outside of the water storage unit 10. do.

Under the water storage unit 10 is a heat medium storage unit 20 is formed. The heat medium storage part 20 has a double chamber structure having an outer chamber 21 and an inner chamber 22 formed at intervals from each other, and is formed in a space 23 formed between the inner chamber 22 and the outer chamber 21. The heat medium is stored. In the heat medium storage part 20, a heat medium supply pipe 25 and a heat medium recovery pipe 26 connected to a space 23 formed between the inner chamber 22 and the outer chamber 21 are formed, and the heat medium supply pipe 25 and the heat medium are formed. The recovery pipe 26 is connected to the heat radiation coil 15. The heat medium supply pipe 25 is provided with a pump 27 for transferring the heat medium. The heat medium uses known heat medium and the maximum operating temperature reaches 300 ~ 400 degrees Celsius. The thermal oil can be heated to a temperature above the break point of the heating water.

Next to the heat medium storage part 20 is a double chamber structure having an outer chamber 31 and an inner chamber 32 formed at intervals from each other, and a space is formed between the outer chamber 31 and the inner chamber 32. The water preheating part 30 is formed. The space 35 formed between the outer chamber 31 and the inner chamber 32 of the water preheating unit 30 is connected to the water storage unit 10 through two tubes, and thus the water preheating unit 30 The space 35 formed between the outer chamber 31 and the inner chamber 32 is filled with heating water. Among the two pipes, a rising pipe 33 having a small gravity of water rises is connected to the upper portion of the water storage unit 10 and the water preheating unit 30 and a descending pipe 34 having a relatively large gravity of water falling. The water storage unit 10 and the water preheating unit 30 is connected to the bottom.

The inner chamber 22 of the heat medium storage part 20 and the inner chamber 32 of the water preheating part 30 are connected to form one inner space. However, the space 23 between the outer chamber 21 and the inner chamber 22 of the heat medium storage unit 20 and the space between the outer chamber 31 and the inner chamber 32 of the water preheating unit 30 ( 35) are separated from each other.

The heat medium storage part 20 communicates with the inner space of the inner chamber 22 and extends to the outside of the heat medium storage part 20 to be connected to the heat exchange pipe 11 of the water storage part 10. Is formed.

The metal heat storage core 40 is formed in the inner space formed by the inner chamber 22 of the heat medium storage part 20 and the inner chamber 32 of the water preheating part 30 being connected to each other. The metal heat storage core 40 is a cylindrical metal mold having a solid structure in which a plurality of through holes are formed and except the through holes. Among the holes of the metal heat storage core 40, the hole located in the middle is the entry hole 42, the holes around the discharge hole 44, and the entry hole 42 is a hot air inlet pipe 46 connected to the burner 1. Connected with The metal heat storage core 40 is formed such that the rear end of the metal heat storage core 40 is positioned at the boundary between the heat medium storage part 20 and the water preheating part 30. The front end of the metal heat storage core 40 is in contact with the ceramic heat storage core 60 to be described later. In the present embodiment, as the material of the metal heat storage core 40, duralumin is used, but it is better to use copper having good thermal conductivity, and if such a material is expensive, the metal material is most excellent in thermal conductivity, so it is one of the other metal materials. It can be formed by selecting.

The ceramic heat storage core 60 is a cylindrical ceramic mold having a solid structure in which a plurality of through holes are formed and except for the through holes. As the material of the ceramic heat storage core, a ceramic material such as aluminum oxide is used. Among the pores of the ceramic heat storage core 60, the hole located in the center is the entry hole 62, the holes around the discharge hole 64, and the entry hole 62 is a hot air inlet pipe 46 connected to the burner 1. ) And at the same time to the entrance hole 42 of the metal heat storage core, the discharge hole 64 is connected to the discharge hole 44 of the metal heat storage core. Since the ceramic heat storage core 60 is made of a ceramic material, it takes a long time for the temperature to rise and also takes a long time for the temperature to drop after the temperature rises once. In other words, the heat storage core made of ceramic does not suddenly rise in temperature even after receiving heat from the burner, but gradually rises in temperature, and once heated, does not rapidly release heat even after dissipating heat to the outside. Therefore, the ceramic heat storage core is suitable for the use of heat for a long time rather than the use of heat in a short time. In other words, when heating is required for only 2 hours, a heat storage core made of metal, which accumulates heat relatively quickly and releases heat relatively quickly, plays a big role. As heat accumulates, both the ceramic heat storage core and the metal heat storage core discharge heat and play a large role in heating.

The burner 1 burns fuel to generate hot air, and the generated hot air is transferred to the metal heat storage core 40 by a blower (not shown).

The control unit (not shown) installed in the room is provided with a screen to display the heating water temperature and the heating water temperature is similar to the temperature of the hot water. The control unit is provided with a heating switch, hot water use switch, hot water heating switch. The heating switch starts heating, the hot water use switch is used when the hot water is used, and the hot water heating switch is used to increase the temperature of the hot water.

Hereinafter will be described the operation and effect of the boiler provided with a metal heat storage core 40 according to a preferred embodiment of the present invention having the above configuration.

The hot air generated by burning the fuel in the burner 1 enters the entrance holes 62 and 42 of the ceramic heat storage core 60 and the metal heat storage core 40 through the hot air inlet pipe 46. The hot air passes through the ceramic heat storage core 60 and the metal heat storage core 40 through the entry holes 62 and 42 in the right direction of the drawing, and heats the ceramic heat storage core 60 and the metal heat storage core 40. To pass. The hot air passing through the entrance holes 62 and 42 hits the inner chamber 32 of the water preheating part 30 and then changes the traveling direction so that the discharge holes of the metal heat storage core 40 and the ceramic heat storage core 60 are changed. (44, 64). The hot air is discharged through the discharge holes 44 and 64 to the ceramic heat storage core 60 and the metal heat storage core 40 while passing through the metal heat storage core 40 and the ceramic heat storage core 60 in the left direction of the drawing. To pass.

Since the hot air passing through the metal heat storage core 40 to the right through the entry hole 42 flows into the inner chamber 32 of the water preheating part 30, the hot air entering the water preheating part 30 is the water preheating part. Transfer heat to the inner chamber 32 of the (30). Therefore, the heating water filled in the space between the outer chamber 31 and the inner chamber 32 of the water preheating unit 30 is heated. The heated heating water rises by natural convection as the specific gravity decreases and enters the water storage unit 10 through the rising pipe 33, and the cold heating water having a relatively high specific gravity of the water storage unit 10 is natural convection. It descends into the water preheating unit 30 through the descending pipe by the inflow.

The hot air passing through the ceramic heat storage core 60 to the left through the discharge hole 64 is discharged to the inner chamber 22 of the heat medium storage unit 20 and then extended to the outside of the heat medium storage unit 20. The feed pipe 27 is supplied to the heat exchange pipe 11 of the water storage unit 10. The hot air transfers heat to the heating water of the water storage unit 10 while passing through the heat exchange pipe 11 to increase the temperature of the heating water. The hot air passing through the heat exchange pipe 11 is discharged to the outside of the boiler through the gas discharge pipe 12.

In the process of hot air passing through the ceramic heat storage core 60 and the metal heat storage core 40 and passing through the inner chamber 22 of the heat medium storage unit 20 to the water storage unit 10, the hot air is the ceramic heat storage The heat is transferred to the core 60 and the metal heat storage core 40, and the ceramic heat storage core 60 and the metal heat storage core 40 transfer heat received from the hot air back to the inner chamber 22 or the hot air is directly Heat is also transferred to the inner chamber 22 of the heat medium storage unit 20. The heat medium storage unit 20 heats the heat medium with the heat received from the hot air.

The metal heat storage core 40 is heated up to about 250-300 degreeC, and a heat medium is also heated up to about 200-250 degreeC. Therefore, in the state where the operation of the burner 1 is stopped, the heat medium is circulated from the heat medium storage part 20 to the heat medium heat radiation coil 15 by operating the pump 27 of the heat medium supply pipe 25. The heat medium circulating the heat medium heat radiation coil 15 heats the heating water of the water storage unit 10.

The electric heater rod 13 may be operated continuously during the heating time, or may be operated according to various conditions, such as to operate only when the heating water is below a certain temperature, for example, 40 ℃ or less.

Various methods may be used for heating the heating water by using the burner 1 and the heat medium together, and the following description may be one example.

When the heating switch is turned on, the burner 1 of the boiler operates to supply hot air and heat the heating water. When the temperature of the heating water reaches 70 ° C., the burner 1 stops working. At this time, the temperature of the metal heat storage core 40 is 250 to 300 ° C. From the moment the heating switch is turned on, heating by the heating water continues.

When the temperature of the heating water drops to 60 ° C. or lower as the heating is performed, the pump 27 for circulating the heat medium operates to circulate the heat medium. The heating medium circulates to heat the heating water of the water storage unit 10.

When the temperature of the heat medium drops below 50 ° C, the burner 1 is operated again to heat the heating water and to heat the metal heat storage core 40.

As this process is repeated, the burner 1 and the heating medium alternately heat the heating water.

The operation method as described above may be used in various ways such as setting the temperature of the heating water so that the burner 1 is operated until the heating water reaches the set temperature, after which the burner 1 is stopped and the heating medium is circulated. .

When hot water is used, the operation of the pump 27 for circulating the heating water is stopped when the hot water switch is turned on. The heating water stored in the water storage unit 10 is discharged as hot water. The temperature of the heating water is displayed on the controller and the temperature of the heating water is almost the same as that of the hot water. Therefore, the burner 1 is operated to increase the temperature by reading the temperature of the heating water. At this time, the burner (1) operating switch for operating the burner (1) when using hot water separately from the heating switch is provided.

The use of the electric heater rod 13 can reduce the cost relative to the case of using only fuel because the electric charge is low in the case of using a late night electricity at home, in the case of commercial or factory electricity.

Table 1 shows the experimental results of operating the boiler according to the present invention with a burner nozzle of 0.75 mm with kerosene as the fuel while the hose was exposed to 400 m in the atmosphere at an outdoor temperature of 0 degrees Celsius and 5 degrees Celsius. will be. The unit of temperature uses degrees Celsius.

Temperature (below, unit ℃) / time (the side) 0 10 minutes 20 minutes 30 minutes 40 minutes 50 minutes 60 minutes Average Heating water 8 31 44 61 67 67 46.3 Primary Heating medium 25 50 80 110 150 205 103.3 Heating discharge water (OUT) 4 14 23 49 53 54 32.8 Heating Recovery Water (IN) 11 6 5 7 9 28 11.1 Temperature difference (OUT-IN) -7 8 18 42 44 26 21.8 Heating water 67 61 57 61 56 52 49 56 Secondary



Heating medium 205 200 180 100 80 60 70 115 Heating discharge water (OUT) 54 50 47 52 50 47 45 48.5 Heating Recovery Water (IN) 28 31 33 32 32 34 33 32.5 Temperature difference (OUT-IN) 26 19 14 20 18 13 12 17.4 Heating water 49 58 68 69 65 3rd



Heating medium 70 90 160 180 143 Heating discharge water (OUT) 45 49 56 57 54 Heating Recovery Water (IN) 33 31 31 32 31.3 Temperature difference (OUT-IN) 12 18 25 25 20 Heating water 69 63 59 60 57 53 50 57 4th



Heating medium 180 180 175 110 80 75 70 115 Heating discharge water (OUT) 57 54 51 53 52 49 46 50.8 Heating Recovery Water (IN) 32 36 35 35 34 35 34 34.8 Temperature difference (OUT-IN) 25 18 16 18 18 14 12 16 Heating water 50 61 68 69 66 5th



Heating medium 70 95 170 200 155 Heating discharge water (OUT) 46 51 55 57 54.3 Heating Recovery Water (IN) 34 33 32 33 32.6 Temperature difference (OUT-IN) 12 18 23 24 21.6 Heating water 69 64 59 57 58 54 50 57 6th



Heating medium 200 190 175 150 90 75 70 125 Discharge water 57 55 51 48 53 49 46 50.3 Recovery water 33 36 37 35 34 33 33 34.6 Temperature difference 24 19 18 13 17 16 13 16

The boiler burner (1) was operated for 46 minutes until it burned out 3.17 liters of kerosene.

The temperature of the heating water rose from 8 to 67 degrees, the heating medium temperature rose from 25 to 205 degrees, and the temperature of the heating discharge water rose from 4 to 54 degrees during 46 minutes of operation of the burner (1). , The heating water rose from 11 to 28 degrees.

The burner 1 was then stopped for 60 minutes and the heat medium was circulated using the pump 27. During the 60 minutes of circulating the heat medium, the temperature of the heating water dropped from 67 degrees to 49 degrees, and the temperature of the heating water dropped from 205 to 70 degrees, and the temperature of the heating discharge water dropped from 54 degrees to 45 degrees. The temperature of the heating water was 28 to 33 degrees.

After 60 minutes, burner 1 was operated for 23 minutes to burn 1.58 liters of kerosene. The temperature of the heating water rises from 49 degrees to 69 degrees, the temperature of the heating medium rises from 70 degrees to 180 degrees, the temperature of the heating discharge water rises from 45 degrees to 57 degrees, and the temperature of the heating recovery water drops from 33 degrees to 32 degrees. It was.

Thereafter, the operation of the burner 1 was stopped for 60 minutes and the heat medium was circulated using the pump 27 as follows. The temperature of the heating water drops from 69 degrees to 50 degrees, the heating medium temperature drops from 180 degrees to 70 degrees, the temperature of the heating discharge water drops from 57 degrees to 46 degrees, and the temperature of the heating recovery water rises from 32 degrees to 34 degrees. It was.

The burner 1 was operated again for 23 minutes to burn 1.58 liters of kerosene. The temperature of the heating water rises from 50 degrees to 69 degrees, the heating medium temperature rises from 70 degrees to 200 degrees, the temperature of the heating discharge water rises from 46 degrees to 57 degrees, and the temperature of the heating recovery water drops from 34 degrees to 33 degrees. It was.

Thereafter, the operation of the burner 1 was stopped for 60 minutes and the heat medium was circulated using the pump 27 as follows. The temperature of the heating water drops from 69 degrees to 50 degrees, the heating medium temperature drops from 200 degrees to 70 degrees, the temperature of the heating discharge water drops from 57 degrees to 46 degrees, and the temperature of the heating recovery water rises from 33 degrees. Descended to 34 degrees.

In conclusion, the 92 minutes burner (1) was operated to burn 6.34 liters of kerosene, and the temperature of the heating discharge water was maintained above 50 degrees for about 3 hours and 45 minutes. In other words, during the first 46 minutes, the temperature of the heating discharge water was less than 50 degrees, but the temperature of the heating discharge water exceeded the average of 50 degrees during the next 3 hours and 46 minutes. Therefore, the effective heating time can be seen as 3 hours 46 minutes. In the experiment using the boiler of the present invention, the temperature difference between the heating discharge water and the heating recovery water maintained an average of 16 to 21 degrees.

When a conventional kerosene boiler can burn for 120 minutes with 6.34 liters of kerosene in an environment where the temperature difference between the heating discharge water and the heating recovery water is an average of 14 to 17 degrees, stop for 30 minutes after burning for 60 minutes and then stop for 30 minutes after burning for 60 minutes. The average temperature of the heating discharge water was in the order of 60 minutes (42 degrees)-30 minutes (40 degrees)-60 minutes (51 degrees)-30 minutes (44 degrees). In other words, the temperature of the heating discharge water for 3 hours stayed below 45 degrees for 2 hours.

Therefore, it can be seen that the fuel saving effect of the boiler according to the present invention is very excellent.

Table 2 shows an experiment of operating a boiler according to the present invention having a burner nozzle of 0.75 mm using kerosene as a fuel with an outdoor temperature of 11 mm and an inner diameter of 15 mm at 500 m. The results are shown. The unit of temperature uses degrees Celsius.

Temperature (below, unit ℃) / time (the side) 0 10 minutes 20 minutes 30 minutes 40 minutes 50 minutes 60 minutes Average Heating water 11 21 28 36 42 55 58 Primary Heating medium 15 65 130 175 210 125 220 Heating discharge water (OUT) 11 20.5 20 31 37.4 51.6 53.2 Heating Recovery Water (IN) 10.4 13.2 19.1 22.1 26.5 33.0 41.5 Temperature difference (OUT-IN) -0.6 7.3 5.9 8.9 10.9 18.6 11.7 ON Heating water 54 52 55 50 Secondary



Heating medium 215 200 100 80 Heating discharge water (OUT) 48.6 46.7 49.3 46.6 49.3 (90) Heating Recovery Water (IN) 42.2 40.1 42.5 42.0 Temperature difference (OUT-IN) 6.4 6.6 6.8 4.6 OFF Heating water 50 57 58 55 52 54 50 3rd



Heating medium 80 165 200 200 185 100 85 Heating discharge water (OUT) 46.6 52.8 55.0 47.0 41.3 50.3 46.7 48.8 (60) Heating Recovery Water (IN) 42.0 42.1 44.7 44.7 47.0 41.2 41.5 Temperature difference (OUT-IN) 4.6 10.7 10.3 2.3 -5.7 9.1 5.2 ON OFF Heating water 50 57 58 4th



Heating medium 85 140 195 Heating discharge water (OUT) 46.7 53.7 53.4 Heating Recovery Water (IN) 41.5 41.3 45.6 Temperature difference (OUT-IN) 5.2 12.4 7.8 ON Heating water 60 55 58 53 50 43 5th



Heating medium 220 200 105 85 75 70 Heating discharge water (OUT) 54.3 50.1 55.8 51.1 47.6 45.0 51.3 (90) Heating Recovery Water (IN) 45.1 44.8 44.4 44.7 42.3 40.3 Temperature difference (OUT-IN) 9.2 5.3 11.4 6.4 5.3 4.7 OFF

The burner (1) of the boiler was operated until it burned out 3.7 liters of kerosene, and the burner was operated for 60 minutes, and the heating medium was circulated for 10 minutes between 40 to 50 minutes.

During the 60 minutes of operation of the burner (1), the temperature of the heating water rose from 11 to 58 degrees, the heating medium temperature rose from 15 to 220 degrees, and the temperature of the heating discharge water rose from 11 degrees to 53.2 degrees. The heat recovery water temperature rose from 10.4 degrees to 41.5 degrees. At this time, as the heat medium was circulated for 10 minutes, the temperature of the heating discharge water exceeded 50 degrees Celsius at the point of 50 minutes, so the temperature of the heating discharge water quickly reached 50 degrees Celsius because the heating medium was circulated.

Thereafter, the operation of the burner 1 was stopped for 40 minutes, and the heat medium was circulated from 20 minutes to 20 minutes after the burner was stopped using the pump 27. As a result, the temperature of the heating discharge water was maintained between 46 and 49 degrees for a total of 40 minutes.

The burner 1 was then operated again for 30 minutes to burn 1.85 liters of kerosene, after which the burner was stopped for 30 minutes, and the heat medium was circulated for the last 20 minutes of the total 30 minutes of stopping the burner. As a result, the average temperature of the heating discharge water was 48.8 degrees for 60 minutes.

The burner 1 was then started again for 30 minutes, the burner was stopped for 60 minutes, and the heat medium was circulated for 40 minutes from 20 minutes after the burner was stopped. The average temperature of the heating discharge water was maintained at 51.3 degrees for a total of 90 minutes.

In conclusion, the burner 1 was operated for 2 hours to burn 7.4 liters of kerosene, and the temperature of the heating discharge water was maintained at about 50 degrees for about 3 hours and 30 minutes. That is, during the first 50 minutes, the temperature of the heating discharge water was mostly less than 50 degrees, but the temperature of the heating discharge water maintained around 50 degrees on average for the next 3 hours and 30 minutes. Therefore, the effective heating time can be seen as 3 hours 30 minutes.

The boiler of the present invention transfers heat twice when the hot air enters the ceramic heat storage core 60 and the metal heat storage core 40 and when the hot air is discharged, so that the heat of the hot air is very efficiently. And 60 to the metal heat storage core 40.

Hot air for heating the ceramic heat storage core 60 and the metal heat storage core 40 simultaneously heats the heating water of the water preheating unit 30 located on the rear of the metal heat storage core 40, thereby preheating the heating water. have.

The water preheating unit 30 circulates the heating water by natural convection due to the specific gravity difference according to the temperature difference of the water, rather than circulating the heating water by a forced means.

The heat exchange pipe 11 installed in the water storage unit 10 may be formed of a plurality of small diameter tubes or wound in a coil form in order to increase the heat exchange area.

The electric heater rod 13 is effective when used to preheat the heating water to a certain temperature using low-cost electric energy.

In the present invention, the metal heat storage core 40 is directly heated and used as a heat source. The metal heat storage core 40 is advantageous in that it can raise the temperature to a very high temperature. That is a means of storing a large amount of heat. Since the heat medium has a limit on the maximum use temperature, the metal heat storage core 40 is used as a heat storage means capable of rising to a higher temperature than the heat medium. Therefore, the metal heat storage core 40 is used as the primary heat storage means and the heat medium is used as the secondary heat storage means. When the heat medium transfers heat to the heating water, the temperature of the heat medium decreases. In this process, the heat medium continues to receive heat from the metal heat storage core 40. Therefore, the temperature of the heating medium does not fall rapidly but falls slowly and slowly. Therefore, heating is possible for a long time even when the operation of the burner 1 is stopped. The ceramic heat storage core 60 also serves as a primary heat storage means.

In the boiler of the present invention, the combustion heat of the burner is accumulated in the metal heat storage core, and the metal heat storage core is formed of a metal material capable of storing a lot of heat by heating up to several hundred degrees Celsius, and the heat retained by the metal heat storage core is a break point of the heating water. It is heated to a much higher temperature and transferred to heat medium oil that can store heat, and heat medium oil has a structure that transfers heat to heating water.

The boiler of the present invention uses a metal heat storage means for the first time in the boiler, and in particular, the present invention does not transfer heat directly to the heating water having a low boiling point in the heat storage core and is heated to a temperature higher than the breaking point of the heating water in the heat storage core. Since heat is transferred to heat medium oil, heat is gradually transferred from heat storage core to heat medium oil rather than rapidly. Therefore, the heat storage core can retain heat for a long time. The result is a long heating time using the heat storage core even with the burner off.

The boiler uses water (heating water) as a means of supplying heating heat. When heat is transferred directly from the metal heat storage core to the water (heating water), the heat storage core of the metal is heated to a very high temperature of several hundred degrees. Since the water temperature is between 70 and 80 degrees, the water in contact with the regenerative core can boil immediately and become steam, resulting in a high pressure that can cause the boiler to explode. For this reason, it was not possible to apply metal heat storage cores as heat storage means in boilers.

However, the present invention does not directly transfer heat to the heating water having a low boiling point in the heat storage core, but transfers heat to the heat medium oil which can be heated to a temperature higher than the breaking point of the heating water in the heat storage core. Thermal oil has a maximum operating temperature of 300 ~ 400 degrees Celsius, so it does not boil and evaporate easily even if it receives heat directly from the metal heat storage core. Therefore, there is no danger of explosion of the boiler.

In addition, since the temperature difference between the heat storage core of the heated metal material and the heat medium oil heated to 200 degrees or more is much smaller than the temperature difference between the heating water and the heat storage core, the heat does not move rapidly from the heat storage core to the heat medium oil. It is. Therefore, the heat storage core can retain heat for a long time.

After all, the heat storage core of the boiler of the present invention can eliminate the risk of explosion of the boiler because it exchanges heat with the heat medium, and heat can be stored for a relatively long time because the temperature difference between the heat storage core and the heat medium is small. As a result, the heat storage core can store heat for a long time, so that the heating water can be heated for a long time without starting the burner in the boiler.

In a boiler using heating water, a heat storage core made of metal that is heated to several hundred degrees or more, and in addition, a heat storage core made of metal which is heated to a high temperature can be heated to a temperature much higher than the break point of the heating water. By heat exchange with the heat medium oil, the heat storage core keeps heat for a long time, and the heat medium oil supplies heat to the heating water for heating.

As a result, the fuel-saving boiler of the present invention saves fuel by heating for a long time with the burner turned off as a result of accumulating heat by using a metal heat storage core, and using a heat storage medium simultaneously while using a metal heat storage core. To eliminate the risk of explosion.

Claims (4)

A water storage unit having a heat exchanger formed therein and storing heating water for heating therein;
A burner that burns fuel and supplies hot air;
In order to be able to heat the heating water even when the combustion of the fuel of the burner is stopped, it is formed of a metal material which can be heated to several hundred degrees or more, and a hole through which the hot air introduced from the burner is formed is formed. A portion excluding the hole is formed of a solid structure filled inside the heat storage core that absorbs and accumulates heat from the hot air;
A heat medium storage unit formed adjacent to the heat storage core and receiving heat from the heat storage core and storing heat medium oil capable of being heated to a temperature higher than a boiling point of the heating water therein; And
A heat radiation coil connected to the heat medium storage unit to receive the heat medium oil and transferring heat to the heating water of the water storage unit, wherein the hot air is supplied to the heat exchanger of the water storage unit to heat the heating water Fuel-saving boiler.
The method of claim 1,
The metal heat storage core transfers heat to the heat medium and does not directly transfer heat to the heating water.
The heating apparatus of claim 1, wherein the heating water is connected to the water storage unit to store a portion of the heating water, and is located adjacent to the metal heat storage core to receive heat from the hot air passing through the metal heat storage core. Fuel-saving boiler that further comprises a water preheating unit.
The method of claim 1,
A fuel-saving boiler, characterized in that the ceramic heat storage core is installed in front of the metal heat storage core.

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