KR20120041834A - Eletric steam, hot-water boilor - Google Patents

Abstract

PURPOSE: An electric boiler for hot water and steam is provided to prevent over-pressure by cutting off power for an entire boiler and to reduce electricity consumption by maintaining a constant pressure and temperature inside of the boiler by increasing the preheating temperature of the supplied water. CONSTITUTION: An electric boiler for hot water and steam comprises a steam tank(1), a water supply pump(7), and a hot water chamber(26). Water is heated by an electric heater arranged in the lower part of the steam tank. Steam is generated in an upper steam chamber(3), thereby being discharged through an outlet(28). The water returned back through the water supply pump is preheated by heat-exchanging with the high-temperature steam of the boiler main body in the small steam storage chamber(4). The preheated water is supplied to a heating chamber in the lower part of a boiler tank. The boiler main body and hot water chamber are formed into a body. The water in the hot water chamber is heated by using heat in the steam tank.

Description

Electric Steam Boiler with Hot Water {ELETRIC STEAM, HOT-WATER BOILOR}

In the present invention, the water supplied to the boiler heating chamber in the electric steam boiler is heated and evaporated by the heater so that the water level of the heating chamber is lowered so that the temperature and pressure of the steam tank is lowered when the water is supplied to the boiler to the boiler. The present invention relates to an electric steam boiler for both hot water and hot water, which can be used at the same time as using hot water of the boiler body.

In addition, by setting a separate control system for each number of heaters, it is possible to operate the boiler normally even when there is a failure of the heater, and to block the over-pressure electricity to cut off the power three-phase (380V) main electricity heated by the heater to prevent overpressure. The invention relates to installing the device.

Generally known electric steam boiler is composed of a lower heating chamber and an upper steam chamber in which water is contained in the tank, and the lower heating chamber is configured to generate steam as a steam outlet in the upper steam chamber by heating water by an electric heater. It is.

In the boiler, the water contained in the lower heating chamber is provided with a water level sensing means so that the water can be heated at a constant level at all times. When the water in the lower heating chamber is detected by the water level sensing means, Tap water is configured to replenish water through a water pump.

However, as mentioned above, when the water in the lower heating chamber is insufficient, the water supplied from the external water pipe is cold, so that there is a large temperature deviation from the heated water in the boiler lower heating chamber. The problem that the temperature and pressure in the steam room are not constant due to the rapid drop in the temperature of the water in the room and the expansion pressure in the boiler has been registered in advance and proposed by Utility Model Registration No. 20-0419111. The method of preheating the heater in the Utility Model No. 20-0419111 claim 6 has a problem of consuming power. In addition, the pre-registered utility model registration No. 20-0442500 claim (1) has also been to allow the preheated water to be supplied to the boiler by using the heat of the boiler body high temperature. However, such electric steam boilers have a disadvantage in that only steam can be used and hot water cannot be used together.

In addition, the heaters installed in the lower heating chamber of the boiler is not individually controlled, so if the heater rod is broken, there is a problem that the entire breaker cannot be used because the electric breaker goes down.

The safety shutoff device of the electric steam boiler as described above uses four ① leakage current breaker, ② pressure cut off switch, ③ overheat cutoff device, and ④ safety valve. When there is a leakage circuit breaker, it cuts off the electricity. ② The pressure cut-off switch sets the pressure required for the normal operation of the boiler, and the three-phase magnet switch that controls the three-phase heating heater gives 220V operation electric signal for turning on or off the electricity. If the three-phase magnet switch that controls the heater fails and the electricity is still attached and cannot be shut off, when the boiler's internal temperature and pressure continue to rise and the boiler's body temperature increases, the ③ safe electrical shutoff device, ③, is operated. The overheat protection is characterized by shutting off the 220V electricity from the 220V operation mains.However, when the 220V operation is cut off, the three-phase magnet can be sent to the three-phase magnet switch that controls the heating of the three-phase heater. The same is true even if the switch keeps sticking and there is a fault that does not cut off the three-phase electricity. The internal temperature and pressure continues to increase, when such a situation the thermal protection is a problem that the three-phase power (380V) electricity not block.

Utility model registration system 20-0419111 Utility model registration system 20-0442500

In order to solve this problem, the present invention installs a small steam storage room at a position lower than the boiler high water level at the outlet of the electric boiler steam, and coils a coiled copper tube therein, and exchanges the water required for the boiler while passing the high temperature steam from the small steam storage room. It is a water supply preheating device that supplies heat to the boiler so that the temperature and pressure inside the boiler tank do not fall, thereby utilizing high temperature steam to improve thermal efficiency and save energy by saving energy.

In addition, by installing the double tank-type hot water room outside the main body by recycling the high temperature heat of the boiler main body, the hot water is made by using the high temperature heat from the outer wall of the boiler to use the hot water partially.

In the event of failure of the heater rods in the boiler steam heating chamber, a separate control system should be adopted for each heater rod so that it does not significantly affect the normal use of the boiler.

To prevent boiler overpressure, two pressure control controllers are installed so that the first controller sets the normal pressure and the second controller sets the range higher than the pressure set in the first controller. When it continues to rise, it is possible to shut off the three-phase (380V) main electricity that heats the heater with the second controller.

(1) Between the feed water pump to feed the boiler and the boiler heating chamber, make a small steam storage room at a position lower than the boiler high water level toward the boiler steam outlet, wind the copper pipe inside the coil type, and then coil the copper pipe outside the small steam storage room. Install a solenoid valve at the inlet and a half check valve at the outlet. The hot steam exiting the boiler steam outlet is discharged through the small steam storage chamber. At this time, the water supplied to the boiler is heated by the high temperature steam through the steam chamber coil type copper tube to supply the preheated water to the boiler.

(2) Install a double tank on the outer surface of the boiler body to create a hot water storage room integrated with the boiler body, install a semi-check valve and a pressure reducing valve at the lower water inlet (direct water pipe) and install a safety valve at the hot water outlet. When steam is not used by installing a temperature sensor on the exterior wall of the boiler steam heating room, turn the steam / hot water two-stage switch to the hot water switch, and use the temperature sensor to heat the heater or issue a stop command to The boiler body can be heated and heated on the outer wall.

(3) In case of failure of the heater rods in the heating chamber, separate control switches are set for each heater rod to switch off the solenoid heater rods, and the remaining heaters will enable normal operation of the boiler.

(4) The branch magnet switch that heats the heater in the boiler heating chamber keeps attaching even when the electric shutoff signal is received, and the electricity is not cut off. In the meantime, in order to prevent overpressure when the internal pressure of the boiler continues to increase, the present invention provides two pressure cutoff switches for controlling the three-phase branch magnet switch of the heating heater (first controller and second controller). Set the range higher than the normal pressure of the boiler (first controller). Three-phase power electricity sets one more main three-phase magnet switch in front of the three-phase magnet switch that controls the boiler heating heater, and if the pressure is higher than normal pressure when the boiler is operating, the second controller sends an overpressure detection signal to the main magnet. It sends to the switch and cuts off the boiler's main three-phase electricity, which cuts off the overpressure of the steam boiler and makes the overpressure alarm buzzer sound automatically. In addition, when the overpressure buzzer is switched off in order to allow the boiler to be used normally before receiving the A / S, the second controller is an overpressure interruption device which is characterized in that it can be used instead of the first controller.

By using high-temperature steam to save energy and recycling, the preheating temperature of the water to be supplied to the boiler is increased to save electricity while maintaining a constant temperature and pressure inside the boiler, as well as to recycle not only steam but also hot water. By setting the individual control system of the heater, even if the heater fails, only the failed heater can be locked and the boiler can be used normally with only the remaining heater.If the pressure of the boiler continues to rise, the entire power is cut off from the power electric (380V) main. The overpressure can be prevented, and the overpressure shut-off device 2 controller can be used instead of the first controller.

1 is a cross-sectional view of the front showing the installation state of the boiler tank
2 is a cross-sectional view of the side showing the installation state of the boiler tank
3 is a three-dimensional view of the boiler tank
4 is a cross-sectional view of the boiler feed water preheating device in the embodiment of the present invention.
Figure 5 is a circuit diagram of the individual control electric heater in the embodiment of the present invention
6 is a method of blocking the overpressure main (three phase 380V) in the embodiment of the present invention

The present invention is provided with a lower heating chamber (2) and an upper steam chamber (3) in which water is contained in the electric steam boiler tank (1), and the lower heating chamber (2) has an electric heater (8H) built-in electric heater (8H). The water is heated by) to discharge steam generated in the upper steam chamber 3 through the small steam storage chamber 4 installed at a position lower than the high water level toward the boiler steam outlet 28. That is, a small cylindrical steam storage chamber 4 is installed toward the boiler outlet 28, and the copper pipe 27 is wound in a coil shape therein, and then the inlet of the coil-type copper pipe 27 outside the small steam storage chamber 4. 22) between the feed water pump (7) and the solenoid valve (14) is installed, the anti-check valve (15) is installed between the boiler heating chamber water inlet port 29 in the outlet (23) and exit the boiler outlet (28) The hot steam is discharged through the small steam storage chamber (4), and when the reduced water in the boiler tank (1) is replenished, the water supplied to the boiler through the coiled copper pipe (27) inside the steam storage chamber (4) at this time It is heated with hot steam to supply preheated water to the boiler.

In the above-described steam boiler, a half check valve 15 is installed between the coil-type copper pipe outlet 23 in the small steam storage chamber 4 toward the boiler steam outlet 28 and the boiler lower water supply port 29 to heat the boiler. 2) The solenoid valve 14 is set between the boiler feed water pump 7 and the small steam storage chamber 4 and the inner coil type copper pipe 27 inlet 22 so that the water in the backflow is not reversed. The water inside the copper pipe (27) was configured to not flow back toward the feed pump (7).

The small steam storage chamber 4 is installed at a position lower than the boiler high water level, and when the water inside the coil-type copper tube 27 is heated by high temperature steam, the temperature of the water rises and the pressure increases, and the half check valve 15 opens. Let the water preheated into the boiler lower heating chamber (2) be ejected

As described above, in the boiler of the present invention, water that is reduced while the water in the lower heating chamber 2 of the boiler tank 1 is heated by the heater 8H maintains a constant water level by the water level sensing means 13 and the steam above the boiler. Steam generated in the chamber 3 is discharged through the small steam storage chamber 4 at the steam outlet 28.

In the process of generating the boiler steam, the water in the bucket (6) outside the boiler is supplemented with a coil-type copper tube inside the small steam storage chamber (4) to the steam outlet (28) through the pump (7) (27) It is a feature of the present invention that it is heated with high temperature steam and then supplied to the boiler heating chamber 2 so that the temperature and pressure inside the boiler do not fall.

In addition, in the electric boiler, the boiler tank body 1 in FIG. 2 becomes a T-shape laid down when viewed from the side. That is, the lower part is made of a circular pipe horizontally and the upper part is vertically raised on a smaller pipe than the lower part. The connection part is welded to make an inner cylinder, and the heater 8H is built in the lower part of the boiler body 1, and the lower heating chamber 2 and the upper steam chamber 3 are configured to be stored in an electric steam storage tank. Tank (1) Connecting the lower pipe and the upper small pipe From the welded part up to the outside, pipes with the same dimensions as the lower circular pipes are erected on the outside and manufactured in a double tank method (Fig. 3). The outside is integrally formed to be a hot water chamber 26. Looking at the hot water chamber 26 of the double tank in Figure 1, the lower direct inlet 18 pressure reducing valve 17 and the half check valve 16 The water enters through receiving a high-temperature heat of the boiler main body 1, while remaining in the hot water chamber 26 is heated and then discharged from the hot water outlet 20 in the upper part with hot water.

When the water pressure is too high, the pressure reducing valve 17 is supplied to the hot water chamber 26 after depressurizing, and the pressure is weakened during the process of discharging the water from the hot water outlet 20. It does not affect the pressure, and can increase the heating efficiency while receiving heat from the outer wall of the boiler body (1). If the hot water is not used, the high temperature heat is continuously received from the outer wall of the boiler main body 1 and the temperature and pressure inside the hot water chamber 26 continuously increase, and the safety valve 19 automatically opens and the hot water room ( 26) The lower half check valve prevents water from flowing back. Thus, the present invention is a hot water combined electric steam boiler having a feature in which the boiler body 1 and the hot water heating chamber 26 are integrated, and also steam, hot water in the boiler electric control part to use only hot water without using steam. Set a two-stage changeover switch (B) to switch the switch to hot water when only hot water is used, and to allow the water in the hot water chamber 26 to heat, a temperature sensor (9) on the outer wall of the boiler heating chamber (2). Heating heater 8H heats the water in the boiler heating chamber 2 to 60 ° C, and the boiler outer wall transmits this temperature to the hot water chamber 26 to make hot water. .

In the electric steam boiler, when the three-phase electric heater (8H) is broken, the three-phase earth leakage circuit breaker (A) on the main side of the electric lane goes down and the present invention can not use the entire boiler individually. Install a 220V operation switch (S1? S6) that controls each heater rod individually. If one heater rod fails, turn off the switch to control the broken heater rod and raise the 3-phase main circuit breaker (A) again to use the boiler normally. To help.

When using the electric steam boiler, the power three-phase (380V) electricity branched from the power distribution board to the boiler is the main three-phase electric circuit breaker (A), three-phase main magnet switch (M) and branch magnet switch (MS1) for controlling the heater ~ MS6) is sent to the heating heater rod in the boiler heating chamber. However, if the corrosion of the heater occurs due to minerals in the water supplied to the boiler, the heater is short-circuited and the main three-phase earth leakage breaker (A) goes down and the entire boiler cannot be used. It is not common to install only one, but to install at least two, and many of the heaters in the boiler are generally outgoing. It is common sense that a heater with a high degree of damage goes out first. Since the boiler can be operated normally, the present invention employs an individual control system S1 to S6 for separately controlling the heater rods.

When the above phenomenon is explained in the drawing, six heating heaters 8H are provided in FIG. 1, and in FIG. 5, a control device is provided separately for each heater number. In the lower part of the figure, heater 6 (H6) is shown at heater 1 (H1), and 220V operation switches S1 to S6 controlling the heaters are installed in a 1: 1 state with the heating heater. For example, if the main breaker (A) goes down while using the boiler, lower all the switches (S1? 6) that control the heaters (H1? H6), raise the main breaker (A) again, and turn the heater switches one by one. When the heater switch is turned up, the main breaker (A) will go down again to find out the heater rod that has failed, so that it can be used normally until the boiler is serviced while the remaining heater switch is turned off. It is a feature of the present invention.

The three-phase power electricity, which is a heating means of the electric steam boiler, enters the distribution board and passes through the three-phase earth leakage breaker (A), the main three-phase magnet switch (M), and the branch magnet switch (MS1 to MS6) to the heaters (8H1 to 8H6). The pressure cut-off switch (P10), a pressure control device, senses the steam pressure inside the boiler and allows the three-phase branch magnet switch to cut off 220V operation electricity so that the specified pressure does not rise abnormally. If the voltage cutoff switch (P10) fails and 220V operation is not cut off, and one or two of the branch 3-phase magnet switches (MS1? 6) to control the heating heater do not operate, the magnet is still attached and the 3-phase In the case of not blocking, the boiler internal temperature and pressure continue to rise while there is a problem in the safety of the boiler, the present invention provides two pressure cut-off switches (first controller (P10) and The second controller (P11)) is installed, the two pressure circuit breaker is connected to the steam tank pressure pipe to detect the internal pressure of the boiler tank, where the first controller (P10) is a normal operating pressure of the boiler 4kg / ㎠ When the internal pressure of the steam tank 1 reaches the set value, the operation of the heating heater 8H is stopped. When the second controller P11 is set to a pressure of 5 kg / cm 2 and the internal pressure of the steam tank reaches the set value, the main three-phase magnet switch M cuts off the main three-phase electricity.

Since the water contained in the steam tank is heated by the heating heater 8H controlled by the first controller P10, as the steam is generated, the temperature and the pressure inside the steam gradually increase, and the pressure of the steam tank 1 is increased by the first controller P10. When reaching the set pressure (4㎏ / ㎠), the heating heater 8H is stopped in the first controller P10, and the steam is discharged from the steam tank outlet 28 so that the pressure of the steam tank can be maintained at a high pressure. The pressure inside is gradually lowered, and at this time, the heating heater 8H is operated and heated again under the control of the first controller P10, so that the pressure of the steam tank 1 is maintained at a high pressure again.

As described above, the pressure (5 kg / cm 2) of the steam tank set in the second controller P11 is set in a range higher than the pressure (4 kg / cm 2) set in the first controller P10. If the pressure in the steam tank reaches 5kg / ㎠ while the pressure rises above the set range, the second controller P11 switches to the three-phase main magnet switch to prevent the overpressure alarm buzzer 34 from ringing and overpressure. (M) to cut off electricity.

In addition, the overpressure cutoff device is the first controller (P10) when the boiler pressure rises to the set pressure of the second controller (P11) when the failure of the first controller (P10) while the overpressure buzzer (34) rings, the first controller ( Another feature is that there is a problem with the branch three-phase magnet controlled by P10 or the heater 8H, and when the buzzer switch 35 is locked, the second controller P11 may use the first controller P10 instead. There is this.

1: boiler main body 25: steam outlet
2: heating chamber 26: hot water chamber
3: steam room 27: coiled copper tube
4: water supply preheater (small steam storage room) 28: boiler steam outlet
5: water level detection chamber 29: boiler water inlet
6: bucket 30: boiler pedestal
7: feed pump 31: safety valve
8H: Heated heater 32: Drain
9: temperature sensor A: earth leakage breaker
P10: first controller B: steam, hot water two-stage switch
P11: second controller C: temperature sensor
12: Pressure gauge M: Main three-phase magnet switch
13: Water level sensor MS1 ~ MS6: branch magnet switch
14: solenoid valve 8H (1-6): heater
15: Half check valve S1-S6: Heater switch
16: half check valve 34: overpressure alarm buzzer
17: pressure reducing valve 35: switch of overpressure alarm buzzer
18: direct import
19: safety valve
20: hot water outlet
21: steam outlet
22: coiled copper tube inlet
23: coiled copper tube outlet
24: steam inlet

Claims (5)

An electric steam boiler configured to heat water with a lower electric heater of a steam tank to generate steam in an upper steam chamber and discharge it to a steam outlet, wherein water entered through a feed pump is transferred from a small steam storage room to high temperature steam of a boiler body. Preheated by heat exchange and then supplied to the heating chamber under the boiler tank,
Electric steam boiler for combined hot water, characterized in that the internal boiler body and the external hot water chamber is integrated in a double tank method to heat the water in the external hot water chamber using the high temperature heat of the internal steam tank. The method according to claim 1,
The steam outlet side of the boiler is installed in a small steam storage room at a position lower than the high water level, the coil-type copper tube is wound inside the small steam storage chamber, and the solenoid valve and half check installed at the inlet and the outlet side. The method according to claim 1,
The hot water room installed by the double tank method outside the boiler is configured to be integrated with the boiler body, a check valve is installed at the inlet of the water outlet at the lower part of the hot water inlet and a half check, and a safety valve is installed at the outlet of the hot water room. Heater individual control system which set switch to control separately for each number of heaters under boiler Overpressure protection main three-phase (380V) electrical shutoff control system equipped with a second controller and a main three-phase magnet switch to cut off the main electricity when the pressure rises above the normal pressure to prevent boiler overpressure.

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