KR20130041661A - Electrode boiler of water flow control mode - Google Patents

Abstract

PURPOSE: An electrode boiler of a water flow regulating mode is provided to maintain constant current consumption required for the operation of the boiler. CONSTITUTION: An electrode boiler of a water flow regulating mode comprises a water level regulating pump(14), a solenoid valve(28), a reservoir(16), a level regulating valve(20), and a hot water pump(10). The water level regulating pump is interposed between an outlet of a boiler tank(2) and a heat exchanger(12). The solenoid valve controls the water level regulating pump. The reservoir temporarily stores water forcibly sent by the water level regulating pump. The level regulating valve is arranged in the end of a supplementary water supply pipe(18) to control the level of supplementary water supplied to the reservoir. The hot water pump returns the water stored in the reservoir to a boiler tank. [Reference numerals] (AA) Supplementary water;

Description

ELECTRICAL BOILER OF QUALITY CONTROL TYPE {ELECTRODE BOILER OF WATER FLOW CONTROL MODE}

The present invention relates to an electrode boiler for heating and supplying water to an electrode disposed inside a tank, and in particular, to increase or decrease the amount of water in the tank in controlling the current consumption by increasing or decreasing the contact area between the electrode and the water in the tank. The present invention relates to an electrode boiler having a water quantity control method.

An electrode boiler is a boiler in which a plurality of electrodes are arranged inside a tank and a current is applied to these electrodes to heat the heat medium stored in the tank, and a high concentration of electrolyte solution is employed as the heat medium. The arc is generated by the heating method, and a little electrolyte solution is used in a manner in which dilute water is used to be heated without generating arc, and the following Patent Documents 1 and 2 employ a high concentration electrolyte solution to form an arc. Disclosed is an electrode boiler having a structure for generating.

The electrode boiler using the high concentration of electrolyte solution has the advantage of reducing the power consumption since the resistance is increased after the arc is generated between the electrodes, but the current consumption is reduced, but in practice, to generate the arc between the electrodes, The facility itself is complicated and large because it needs to be equipped with a very high voltage, which is only suitable for places such as hotels, condominiums and large factories.

On the other hand, in the case of the electrode boiler using water diluted with a little electrolyte solution, no arc occurs between the electrodes, but hot water can be produced because current flows through the water as a resistor, but in this type of electrode boiler, the water temperature rises. If the resistance value is lowered, the current consumption increases.

It is known that the current consumption of 15 ~ 20A / h is optimal in an electrode boiler employing an electrolyte solution.A common method to satisfy this problem is to detect the boiler water temperature at all times and vary the current applied to the electrode according to the water temperature. In order to do this, however, the power control means must be provided separately, and thus, it may not be a preferred method.

Next, the electrode boiler disclosed in Patent Literature 3 reduces the area of contact with water on the surface of the electrode through the bubbles generated in the stored water by injecting compressed air into the tank when the water temperature rises, and then the generated bubbles are moved to the upper portion of the tank. While forming the air pressure to discharge the water inside the boiler to the outside to lower the water level to increase the resistance value between the electrodes to disclose a method of suppressing excessive current consumption, but this type of electrode boiler at the beginning of operation While the compressed air pressure supplied and the water pressure inside the boiler are in conflict, the reduction of the area of the electrode contacting with water is delayed, which makes it difficult to trigger rapid current control.

As another example of the electrode boiler, Patent Document 4 discloses that the electrode cover is installed in the tank to surround the electrode, and the electrode cover is interlocked with a screw rod to move in the axial direction. A structure has been proposed to increase or decrease the area of contact.

However, this method should allow the electrode to move up and down through the top of the tank, and the electrode cover for elevating the electrode should be disposed inside the tank, and the motor and ancillary gear train for elevating the electrode on the outside. There is a problem that the size and structure of the device becomes larger and more complicated than necessary.

Korea Patent Publication No. 10-2010-0130447, Figure 1 Korea Patent Publication No. 10-2010-0057481, Figure 1 Korean Patent Registration No. 10-1016256, Figure 3 Korean Patent Application No. 10-2011-0004206, FIG. 2A

An object of the present invention is to propose a configuration that can quickly increase or decrease the contact area between the surface of the electrode disposed in the tank and the water in suppressing a sharp increase in the current consumption when the electrode boiler is operating, the water temperature in the boiler As soon as a sudden current consumption is detected due to a decrease in resistance value due to an increase, the contact area between the electrode and the water is rapidly reduced to provide an electrode boiler of a water quantity control method that can prevent a sudden increase in current consumption. In order to solve the problems seen in a conventional electrode boiler.

The present invention is an electrode boiler having an electrode bar for heating the water inside the tank and the heated hot water is connected to the hot water pump to circulate from the water outlet pipe of the tank to the inlet pipe through the heat exchanger, the boiler tank A water level control pump is interposed between the water output stage and the heat exchanger, and a top-closed solenoid valve installed in the upper external pipe of the boiler tank is opened simultaneously with the operation of the water level control pump, and the heat exchanger and the water level control pump. Between the reservoir is provided with a reservoir for temporarily storing the water pumped by the water level control pump, the reservoir is attached to the end of the replenishment water supply pipe is provided with a water level valve for controlling the level of the replenishment water, and also the hot water The water stored in the reservoir can be returned to the boiler tank through a pump. So that a communication connection can be implemented by a configuration.

In addition, the electrode boiler according to the present invention, in addition to the above-described configuration, and outputs the current consumption data flowing between the electrodes in real time by the ammeter, the output signal is the amount of current consumed between the electrodes exceeds the appropriate range If the value is a high current detection comparator set to output a high signal, or if the value representing the current consumption in the appropriate range, the input is simultaneously input to the low current detection comparator set to output a high signal, and the high current detection comparator The NOR gate and the AND gate are connected to the output stage in parallel, and the AND gate turns on the switching means when the high signal is output from the high current detection comparator and the low current detection comparator to operate the level control pump and the normally closed solenoid valve. The high current detection comparator From the low current detection comparator when the low signal is output by the NOR gate turns on the switching means a NOR gate for thereby operating the water pump can be also implemented in more with the configuration.

In addition to the above-described configuration, the electrode boiler according to the present invention may further include a bypass tube having a check valve between input and output ends of the water level control pump.

In addition, in the electrode boiler according to the present invention, the boiler tank may further include a water collecting portion which is internally formed, and the water collecting portion may be provided to the inside of the boiler tank via a drain passage formed by a hole or a gap continuous up and down. Subsequently, the water extraction stage may be implemented in a configuration extending outward from the water collecting unit.

According to the electrode boiler of the current control method of the present invention having the above-described configuration, the following advantages and advantages can be obtained.

In the electrode boiler of the present invention, if the current consumption flowing between the electrodes arranged to face the inside exceeds an appropriate range, the water level control pump disposed outside to operate by forcibly draining the water stored therein to be temporarily stored in the reservoir On the surface of the electrode, the area in contact with water is reduced to prevent excessive current consumption. On the contrary, when the current consumption is less than the proper range, the hot water pump operates to return the water temporarily stored in the reservoir to the boiler tank. There is an advantage that can be controlled so that the current consumption required to be in the appropriate range, and compared to a facility using a conventional compressor to control the current consumption has the advantage that it can be controlled more concise and accurate.

In addition, the electrode boiler of the present invention has a small load during operation because the water stored therein circulates through the bypass pipe when the hot water pump operates, and when the water level control pump operates, a check valve moves into the boiler tank. It also has the advantage of being able to quickly and accurately change the level of water stored in the boiler tank because it prevents backflow.

In addition, in the electrode boiler according to the present invention, when the outlet end is extended from the water collecting part to the outside, even if the outlet end is located close to the inlet end, the space between the inlet end and the outlet end is actually far apart internally. In view of the above conditions, the inflow stage can be easily installed even when the water supply stage cannot be disposed at the bottom of the boiler tank. Also, a hole or a gap that vertically runs through the drain passage formed between the boiler tank and the water collecting portion. As it becomes narrower toward the lower side, the speed at which the water level inside the boiler tank is lowered is rapidly progressed at first, and then the speed is gradually lowered, indicating an advantage of increasing control accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows roughly the whole structure concerning 1st Example of the electrode boiler concerning this invention.
Figure 2 is a power supply circuit diagram for timely operation of the hot water pump and the water level control pump provided in the electrode boiler of the present invention.
3 is a sectional view of a boiler tank according to a second embodiment of the present invention.
4 is an enlarged view of a main part structure of the embodiment illustrated in FIG. 2;
FIG. 5 is an enlarged view of another example related to the main part structure of the embodiment shown in FIG. 2; FIG.

Hereinafter, the electrode boiler of the current control method according to the present invention will be described in detail by a preferred embodiment according to the accompanying drawings.

1 is a view showing an embodiment of the present invention, the illustrated electrode boiler is provided with a boiler tank (2) for receiving water and an electrode bar (4) fixed to face each other disposed therein. The electrode 4 is arranged in pairs when the power applied is two-phase, and is arranged in an equilateral triangle of R, S, T in the case of three-phase.

The water stored in the boiler tank 2 can be employed without dilution such as distilled water, filtered water, bottled water, and tap water as long as the electrolyte solution is diluted to about 1% to 3%. The electrolyte material is edible soda, nitrate, silicate, polyphosphate, etc. A rust inhibitor etc. which have the inorganic, amine, oxyacid, etc. as a main component can be used.

The hot water pump 10 is disposed between the water supply stage 6 and the water extraction stage 8 of the boiler tank 2 so as to circulate the hot water generated by the heat exchanger 12. ), And a water level control pump 14 is interposed between the inlet side of the heat exchanger 12 and a replenishment water supply pipe 18 of a reservoir 16 between the output end and the inlet side of the heat exchanger 12. .

The replenishment water is supplied to the reservoir 16 through an external replenishment water line, and the level of the replenishment water stored is always maintained at a constant level by the water level valve 20 such as a float valve and a ball top.

The heat exchanger 12 serves to warm the water of the hot water tank 22 provided separately.

On the other hand, the boiler tank (2) has an outer tube (24) communicated to the outside on one side of the upper, the outer tube (24) has a vacuum pump for lowering the internal pressure of the boiler tank (2) below atmospheric pressure ( 26) and a normally closed solenoid valve 28 connected in parallel to open when the internal pressure of the boiler tank 2 is to be adjusted to atmospheric pressure so that external air is introduced into the boiler tank 2, and the above normally closed type. The solenoid valve 28 discharges the internal hot water of the boiler tank 2 to the outside or discharges the steam pressure generated by the heating of the water, and opens simultaneously with the operation of the water level control pump 14.

Meanwhile, a bypass pipe 30 may be disposed between the input and output ends of the water level control pump 14 to bypass the water discharged through the water discharge end 8, and the operation of the water level control pump 14 may be performed therein. Check valve 32 must be interposed to prevent water from flowing back.

The hot water pump 10 circulates the hot water according to a conventional method if the internal water temperature of the boiler tank 2 is maintained in an appropriate range and the amount of current flowing between the electrodes 4 is also appropriate. It warms up. The water level control pump 14 drains the water when the electrical resistance value decreases as the water temperature of the boiler tank 2 rises, thereby reducing the area in which the surface of the electrode 4 is in contact with the water. It controls to prevent excessive current consumption by increasing the electrical resistance value between).

Since the hot water pump 10 and the water level control pump 14 operate under different conditions as described above, the power supplied thereto must be controlled in a timely manner.

In the present invention, as shown in FIG. 2, the power consumption flowing between the electrodes 4 is checked in real time with a conventional ammeter 34, and the input current consumption data is stored in the high current detection comparator 36a. As an output signal which is applied to the input terminal of the current detection comparator 36b and the output signals of the high current detection comparator 36a and the low current detection comparator 36b are applied together to the NOR gate 38 and the AND gate 40. By controlling the switching means (42) (44), the on / off of the hot water pump (10) and the on / off of the water level control pump (14) and the top-closed solenoid valve (28) are controlled.

In the above-described circuit configuration, the high current detection comparator 36a detects the data of the current consumption measured by the ammeter 34 as a value exceeding an upper limit of an appropriate range (for example, 3 to 20, or 10 to 40 KW / H). It is set to output a high signal when it is input, and the low current detection comparator 36b is set to output a high signal when the current consumption data exceeds the lower limit of the proper range.

The output signals of the high current detection comparator 36a and the low current detection comparator 36b are classified into three types: when the current consumption between the electrodes 4 is less than the proper range, when it is within the proper range, and when it exceeds the proper range. Will appear as a pattern.

That is, when the range is less than the proper range, both the high current detection comparator 36a and the low current detection comparator 36b output low signals. When the range is within the proper range, only the low current detection comparator 36b outputs the high signal. At this time, both the high current detection comparator 36a and the low current detection comparator 36b output high signals.

According to the output signals of the high current detection comparator 36 and the low current detection comparator 36b, the output signals of the NOR gate 38 and the AND gate 40 are changed as shown in Table 1 below.

condition High Current Detection Comparator 36a Low Current Detection Comparator 36b NOR GATE (38) And gate (40) Below proper range 0 0 One 0 Proper range 0 One 0 0 Out of proper range One One 0 One

As shown in Table 1, when the NOR gate 38 outputs a high signal, the hot water pump 10 operates while the switching means 42 is turned on, and when the AND gate 40 outputs a high signal, the switching is performed. As the means 44 is turned on, the upper and lower solenoid valve 28 is opened simultaneously with the operation of the water level control pump 14.

More specifically, since the NOR gate 38 and the AND gate 40 both output low signals when the electrical resistance value between the electrodes 4 through water is in a proper range, the hot water pump 10 and The level control pump 14 does not operate and the normally closed solenoid valve 28 is placed in a cross state.

However, even at this time, the hot water pump 10 operates when the hot water temperature rises above the set value, so that the normal operation of the boiler such as circulating the hot water to the heat exchanger 12 is performed in the same manner as in the known boiler. .

When the water temperature rises due to the current flowing between the electrodes 4 inside the boiler tank 2, the resistance value of the water is lowered, and the amount of power consumed increases, and this increase in power consumption is an output signal of the ammeter 34. When the output signal exceeds the proper range, as the high signal is output from the high current detection comparator 38a, the NOR gate 38 outputs a low signal, and the AND gate 40 outputs a high signal. As a result, the switching means 44 is turned on to start the operation of the level control pump 14 and the opening of the normally closed solenoid valve 28.

When the level control pump 14 operates with the normally closed solenoid valve 28 open, the water stored in the boiler tank 2 is discharged through the discharge stage 8 and flows back to the reservoir 16 for temporary storage. do. As a result of this drainage action, the water level between the electrodes 4 is lowered, and the area in contact with water on the surface of the electrodes 4 gradually decreases, and the electrical resistance value between the electrodes 4 starts to rise. The power consumption is adjusted to be within the proper range.

On the other hand, when drainage is carried out from the boiler tank 2 to the water discharge stage 8 by the water level control pump 14, since the hot water pump 10 is stopped, it acts as a resistance to the water flow and thus the water to the inlet means 6 This flows back to the reservoir 16 without returning and is temporarily stored.

Moreover, in the structure in which the bypass pipe 30 is arrange | positioned around the water level control pump 14, the check valve 32 prevents the water drained from the discharge means 8 to return to the boiler tank 2 side.

The water flowing back to the reservoir 16 by the water level control pump 14 may be stored above the water level defined by the water level valve 20, and may be temporarily stored up to a quantity corresponding to the height H, for example. .

When the electric resistance value between the electrodes 4 is increased due to the drainage action by the water level control pump 14, and the power consumption is adjusted to an appropriate range, the output of the high current detection comparator 38a is turned low again and thus the AND gate ( 40 also outputs a low signal to stop the water level control pump 14 and the normally closed solenoid valve 28 to cross again to stop the drainage of the boiler tank 2 and this state consumes power between the electrodes 4. Is maintained while in the proper range.

On the other hand, when the water temperature is low and the water temperature decreases and the resistance of the water starts to rise, power consumption falls short of an appropriate range. In this case, both the high current detection comparator 36a and the low current detection comparator 36b output low signals. As a result, only the NOR gate 38 outputs a high signal, and as a result, the switching means 42 is turned on.

As a result, this time, the hot water pump 10 operates to draw water temporarily stored in the reservoir 18 to the water supply stage 6 to perform water replenishment, thereby raising the water level between the electrodes 4 to increase the electrical resistance value. By lowering it, the power consumption is adjusted to an appropriate range.

Further, when the hot water pump 10 is operated, the water level control pump 14 in the stationary state between the water outlet stage 8 and the inlet side of the heat exchanger 12 acts as a resistance to the water flow. Water circulation through the heat exchanger 12 in the c) is forcibly performed, but the water circulation can be smoothly displayed by the installation of the bypass pipe 30.

In addition, when the water in the boiler tank 2 is warmed, closing the normally closed solenoid valve 28 and operating the vacuum pump 26 lowers the internal air pressure, thereby lowering the boiling point of water, thereby minimizing the consumption of electric energy required for heating. can do.

More specifically, when the internal pressure of the boiler tank 2 is lowered to 0.5 BAR by operating the vacuum pump 26, the water starts to boil at 80 ° C., thereby reducing the energy consumed to generate hot water. will be.

In the above-described electrode boiler of the present invention, when water supplied through the water supply end 6 is supplied in the lateral direction of the electrode 4, an electrically undesired electric passage may be formed between the electrode 4 that is opposed. Therefore, it is preferable that the level rise control of the boiler tank 2 is performed through the bottom.

In this embodiment, since the water inlet 6 and the water outlet 8 are arranged at the bottom of the boiler tank 2, the expansion and contraction of the electrical passage according to the increase and decrease of the water level can be regulated constantly.

3 shows another embodiment of the electrode boiler according to the present invention.

The electrode boiler shown in this embodiment is basically the same as the configuration of the above-described embodiment, except that the collecting portion 46 is provided in the vertical direction so as to include the water extraction end 8 at the edge of the boiler tank 2, There is only a difference in the structure in which the boiler tank 2 and the water collecting part 46 communicate with the drain passage 48.

The water collecting part 46 locally receives a portion of the water stored in the boiler tank 2, and then, when the water is discharged through the water extraction stage 8 by the operation of the water level control pump 14, it does not slump. Therefore, the water level decreases between the electrodes 4, so that the action proceeds evenly.

In addition, the drain passage 48 between the boiler tank 2 and the water collecting part 46 is a hole arranged up and down continuously with a smaller diameter as shown in FIG. 4, or as shown in FIG. It can be formed in the form of a gap open up and down to narrow the width.

In this way, when the water collecting portion 46 is disposed on the one side of the boiler tank 2 with the drain passage 48 interposed therebetween, the water extraction stage 8 can be installed at a position close to the lower intake stage 6, but in reality The gap between the inflow passage and the outflow passage is farther away, thereby preventing the interference between the supplied water and the drained water.

As described above, in the configuration in which the drain passage 48 is formed as a passage narrowing toward the lower side, the drainage speed of the water is delayed as the water level decreases, and the rate of increase of the electrical resistance value due to the water level decreases at the beginning of the adjustment. Since it appears quickly and gradually slows down, there is an advantage in that the adjustment range of the resistance value can be set precisely.

In addition, the illustrated embodiment has been described as an example in which the water collecting unit 46 is installed to protrude to one side of the boiler tank 2, but the water collecting unit 46 is divided by partitioning the inside of the boiler tank 2 into a partition member. It can also be implemented in the structure provided.

2: boiler tank 4: electrode
6: acquisition stage 8: extraction stage
10: hot water pump 12: heat exchanger
14: leveling pump 16: reservoir
18: supplemental water supply pipe 20: water level valve
22: hot water tank 24: external engine
26: vacuum pump 28: the normally closed solenoid valve
30: bypass pipe 32: check valve
34: ammeter 36a: high current detection comparator
36b: low current detection comparator 38: NOR gate
40: end gate 42, 44: switching means
46: collecting part 48: drain passage

Claims (4)

In a conventional electrode boiler configured to circulate a heat exchanger by placing electrode rods facing each other to warm water therein and heated water is pumped into a hot water pump,
A water level control pump (14) interposed between the outlet stage (8) of the boiler tank (2) and the heat exchanger (12);
An upper-closed solenoid valve (28) installed in the upper external pipe (24) of the boiler tank (2) and controlled to open simultaneously with the operation of the water level control pump (14);
A reservoir (16) connected in communication with the heat exchanger (12) and the water level control pump (14) to temporarily store water pumped by the water level control pump (14);
A water level valve 20 which is provided at the end of the replenishment water supply pipe 18 and controls the level of the replenishment water supplied to the reservoir 16;
The water volume control electrode boiler consisting of a hot water pump 10 is connected in communication to return the water stored in the reservoir 16 to the boiler tank (2). The method of claim 1,
An ammeter 34 for real-time checking and outputting data of the current consumption amount flowing between the electrode rods 4 facing each other inside the boiler tank 2;
A high current detection comparator 36a set to output a high signal when the data of the ammeter 34 indicates a current consumption exceeding an appropriate range;
A low current detection comparator (36b) set to output a high signal when the data of the ammeter (34) indicates current consumption in an appropriate range;
By outputting the high signal input of the high current detection comparator 36a and the low current detection comparator 36b to output the turn-on signal of the switching means 44 to operate the level control pump 14 and the boiler tank 2. And gate 40 for opening the upper and lower solenoid valve 28 of the;
The NOR gate 38 is further provided to output a turn-on signal of the switching means 42 to the low signal input of the high current detection comparator 36a and the low current detection comparator 36b to operate the hot water pump 10. Electrode boiler of water quantity control method characterized in that. The method of claim 1,
The water volume control type electrode boiler, characterized in that the bypass pipe 30 having a check valve 32 is further disposed between the input and output ends of the water level control pump (14). The method of claim 1,
The water extraction stage 8 extends outward from the water collecting portion 46 which is internally isolated from the boiler tank 2, and has a hole vertically continuous between the boiler tank 2 and the water collecting portion 46. A water quantity control method of the electrode boiler characterized in that it is interposed with a drain passage formed in the gap (48).

Images