KR20050056043A - Method for controlling pressure of heating water and apparatus thereof - Google Patents

Abstract

The present invention relates to an expansion tank system for regulating heating water pressure and a control method thereof for reducing or compensating water pressure to an appropriate value in response to a change in the amount of expansion of water according to a change in temperature of the heating water. ) And the expansion tank 20 are mixed and degassed by removing the air dissolved in the water through the water separator 10, and the pressure sensor detects the pressure change according to the temperature change of the heating water and transfers it to the microprocessor. If it is larger than the set value, the water separator side channel is opened by the microprocessor, and the water flows into the expansion tank 20 by the expansion pressure to reduce the water pressure, and if the detected pressure is lower than the set pressure, the booster pump (22a) is operated to supply the water in the expansion tank 20 into the water separator 10 to join the pipe circulation system to be circulated by the characteristic The. In the present invention, since the pressure inside the expansion tank 20 operates at the same state as the atmospheric pressure, a pressure holding device such as a compressor is not required, and operation is possible because the system is not stopped, and noise is not generated. Conditions can be greatly improved and facility costs can be reduced.

Description

Expansion tank system for heating water pressure control and its control method {METHOD FOR CONTROLLING PRESSURE OF HEATING WATER AND APPARATUS THEREOF}

The present invention relates to an expansion tank system for regulating heating water pressure and a control method thereof for reducing or compensating water pressure to an appropriate value in response to a change in expansion pressure of water according to a temperature change of heating water.

Recently, as the main environment is changed into a large-scale residential type such as the construction of a new city, the district is adopting district heating or central heating to improve the environmental problems and the efficiency of energy management.

As mentioned above, the district heating facilities, including cogeneration plants, are installed in large residential complexes or adjacent to the district heating to supply heating water to the home.

This heating water is heated in a large boiler and a large heat exchanger is installed in the basement space of the apartment so that the heating water can be supplied to each household included in each unit of a large apartment. Each generation is supplied.

When the heating water is heated while passing through the heat exchanger, the heating water expands and its volume expands, thereby raising the pressure in the pipe. Therefore, since the expansion force of the heating water circulating inside the pipe is changed according to its temperature, the expansion pressure in the pipe is increased or decreased according to the temperature of the heating water.

If the pressure rises in the pipe, the pipe may rupture or the heater may be damaged. In particular, when the capacity of the water is very large, such as a factory or a large apartment where a large amount of heating water is used, such pressure is generated at a very high pressure, so that the pipe pipes must be properly adjusted so as not to rupture due to the water pressure due to the temperature difference of the heating water. On the contrary, when the heating water is cooled, the pressure of the expanded heating water is lowered and the volume of the water is reduced, thereby causing a shortage of pipe water in the pipe.

Since the heating water is thermally expanded when passing through the heat exchanger, the heating water increases the pressure in the pipe according to the volume expansion.

Therefore, the heating water circulating along the pipe line is often changed in expansion pressure according to the temperature, if the pressure rises in the pipe can lead to problems such as pipe rupture or damage to the heating equipment. In particular, when a large amount of water is used, such as in a factory or a large apartment where a large amount of heating water is used, a higher pressure is generated in the water pressure. In case of lack, the water pressure should be adjusted appropriately to compensate for the pressure change by supplementing the insufficient amount of heating water.

An expansion tank system is used as a device that can solve the above problems, and when the temperature of the heating water in the pipe rises, the amount of water corresponding to the expansion pressure is pushed into the expansion tank to absorb the pressure. And, to compensate for the shortage of the heating water is reduced in volume when cooling the heating water can be adjusted to maintain a constant pressure at all times.

In other words, the expansion tank is installed before the heating water flows into the heat exchanger. The heating water supplied to each household passes through the room to perform the heating function, and the heating water discharged from the room is collected in the discharge pipe to be integrated again. It enters the heat exchanger and is reheated.

Hereinafter, the principle and structure of the expansion tank will be described in detail to help the understanding of the expansion tank.

PX Tank System consists of sealed expansion tank, pump, automatic control panel, solenoid valve, throttling valve, etc., and increases the pressure of cold and hot water pipe by microprocessor control device. Keep it in the state. When the temperature of the pipe water rises and the system pressure rises, the solenoid valve of the expansion pipe opens and the expansion water flows into the expansion tank. At this time, the air layer outside the bladder of the expansion tank is always maintained at atmospheric pressure by a pressure equalizing tube. When the high pressure pipe water flows into the expansion tank and the pressure is released, the air dissolved in the water is deaerated due to the difference in solubility (Henry's Law) and then by the air vent installed in the upper part of the expansion tank. It is discharged to the outside. On the contrary, when the temperature of the pipe water drops and the water pressure drops, the booster pump is operated so that the water in the expansion tank is circulated through the pipe circulation system so that the system is always maintained in the proper pressure range and the insufficient water is replenished into the expansion tank.

The expansion separator separates the expansion water by keeping it within the pressure range of the piping system and removes the air in the piping by the degassing function to extend the service life of the pipe by preventing corrosion, and eliminate the shape of the air locking, vibration, and booster. There is an advantage in saving energy by increasing the pump efficiency.

The conventional expansion valve as described above is introduced in detail the concept in Korean Utility Model Publication No. 93-20120.

However, in the conventional expansion tank, when the temperature of the pipe water drops, the booster pump operates to extract water from the expansion tank and the compressor operates together to maintain a constant pressure in the tank when the water in the expansion tank is transferred to the pipe circulation system. Filling the tank keeps the pressure in the tank constant. Therefore, there is a lot of noise in the machine room is installed expansion tank is required for soundproofing, and there is a problem that the system does not operate when the compressor failure.

In other words, because the air is kept in the tank at the water pressure and the set pressure, the pressure sensor detects whether the pressure is above or below the set pressure range. The microprocessor determines that the air pressure in the bladder can be compared with the set point to adjust the pressure in the expansion tank so that the pressure of the pipe water is within the set point.

As described above, when comparing the sensing value and comparing it with the set value, according to the result, the air outside the bladder of the expansion tank is discharged so that water flows into the tank or the water in the tank is discharged into the pipe circulation system. The compressor is activated to fill air out of the bladder of the expansion tank.

As such, the conventional expansion tank system must maintain a constant pressure therein. Therefore, since the compressor must necessarily be installed to reduce or compensate the pressure of the expansion tank in response to the expansion force due to the temperature change of the heating water, the noise of the compressor is very high and the facility cost increases, and the entire system is increased. There has been a problem that does not function properly.

The present invention was devised to solve the problems according to the conventional expansion tank system as described above, the object of the present invention is that the internal pressure of the expansion tank does not exist, so that the installation of the compressor is not required, as a result The present invention provides an expansion tank system for controlling the expansion pressure of heating water and a control method thereof, which can perform the function of the expansion tank without generating any noise.

Hereinafter, the components according to the expansion tank system according to the present invention will be described first with reference to the accompanying drawings, and subsequently, the expansion tank control method will be described.

1 to 5, Figures 1 to 3 as an exemplary side view showing an expansion tank system according to the present invention, Figure 1 is a front view of the expansion tank, Figure 2 is a right side view of the expansion tank, Figure 3 Is a left side view of the expansion tank.

 The concept of the implementation method for implementing the expansion tank system according to the present invention by combining the water separator 10 and the expansion tank 20 by degassing and removing the air dissolved in the water through the water separator 10, heating When the pressure sensor detects the pressure change according to the temperature change of the water and delivers it to the microprocessor, if it is larger than the set value, the passage is opened by the microprocessor, and the water in the separator 10 is expanded by the expansion pressure. (20) to cope with the pressure rise, and if the detected pressure is lower than the set pressure, the booster pump 22a is operated to supply the water in the expansion tank 20 into the separator 10 by piping circulation system It is a basic concept to join and circulate through the barrel.

The water separator 10 constituting the expansion valve system according to the present invention includes an inlet pipe 11 through which heating water discharged from the home is introduced and a discharge pipe 12 through which the introduced water is discharged, and dissolved in water at an upper side thereof. An air vent 13 for separating and discharging the air is provided.

The discharge pipe 12 is attached with a pressure sensor 14 for detecting the pressure in the separator 10, detects the pressure in the separator 10 is delivered to the microprocessor 70 to determine the water pressure.

As shown in FIG. 4, the microprocessor function includes a setting unit 40 for setting an initial pressure value, and a micro for comparing and determining a value set in the setting unit 40 and a detected value detected by the pressure sensor 14. An electronic valve coupled to the processor 70 and the inlet line 21 branched from the discharge pipe 12 described above and connected to the expansion tank 20 by operating the booster pump 22a according to the determination result of the microprocessor. 21a) is opened to allow the water in the separator 10 to flow into the expansion tank 20.

The expansion tank 20 is attached to the equalization tube 24 through the outside on the upper side so that the inside is always maintained at the same condition as the atmospheric pressure, in which the water level sensor 20a is installed expansion tank (20) detects the water level introduced into the water.

If the water level falls below a certain level, as shown in FIG. 3, the water level sensor 20a is operated to open the water supply electromagnetic valve 25a coupled to the water supply pipe 25 connected to the inflow pipe 11 and into the expansion tank. When water is supplied to the water level and reaches a predetermined level or more, the water level sensor 20a closes the water supply electronic valve 25a to block water supply.

If the pressure of the water flowing into the separator 10 is low, if the pressure detected by the pressure sensor 14 is lower than the pressure set in the setting unit 40, the microprocessor 70 operates the booster pump 22a. Inflow into the separator 10 stored in the expansion tank 20 to supply the shortage of water until reaching the appropriate pressure.

Detailed configuration according to the above configuration will be described.

The separator 10 is to degas the air dissolved in the water to prevent corrosion of the pipe as described above, the separator 10 is discharged after the hot water heated by the heat exchanger or boiler passes through the room. The installed heating water is installed before being introduced into the heat exchanger again.

Therefore, it has an inlet pipe 11 through which water is introduced and a discharge pipe 12 discharged therein, and an air vent 13 is provided at an upper side thereof so that the air dissolved in the water escapes to the outside. The discharge pipe 12 is attached with a pressure sensor 14 for detecting the pressure in the separator 10.

Expansion tank 20 is an expansion water inlet line 21 for inducing expansion water from the water separator 10 into the expansion tank 20, and discharges the water introduced into the expansion tank 20 to the piping filtration system. The discharge line 22 and the water level sensor 20a are provided inside, and the equalizing pipe 24 is provided in the upper side.

The expansion water inlet line 21 is connected to the discharge pipe 12 discharged from the water separator 10, the electromagnetic valve 21a is attached to the line. The electromagnetic valve 21a is electrically operated to open and close the passage of the inflow line 21 so that the expansion water flows into or expands into the expansion tank 20. The electronic valve 21a compares the pressure sensing value detected by the above-described pressure sensor 14 with the value set in the setting unit 40 by the microprocessor 70 to be described later, when the detected pressure value is larger than the set value. It is controlled to be opened and closed by a microprocessor, a detailed description of which will be described in more detail in the expansion tank system control method below.

The inlet line 21 is provided with a water supply pipe 25 can supply water directly into the expansion tank 20, the water supply pipe 25 is coupled to the water supply electron valve 25a. The discharge line 22 of the expansion tank 20 is one end is connected to the expansion tank 20, the other end is connected to the inlet pipe 11 of the separator 10, the booster on the discharge line 22 The pump 22a is coupled.

In addition, the discharge line and the inlet line 21 is installed in the bypass pipe 26 directly connected to bypass the water discharged to the discharge pipe 12 of the water separator 10 to the water separator 10 again. It can be introduced.

The expansion tank 20 is attached to the expansion tank system, that is, the pressure sensor 14, the water level sensor 20a and the circuit control panel (1) configured to control the respective electronic valves. As shown in FIGS. 2 and 5, the control panel 1 includes a setting unit 40 for setting and storing an initial pressure value by buttons provided at the front thereof, the pressure sensor 14 and the water level sensor. Comparing and determining the sensing unit 50 composed of sensing means such as 20a, the microprocessor 60 for comparing and determining the set pressure and the sensing value sensed by the sensing unit 50, and the microprocessor 60 According to the result, it consists of the output part 70 comprised by the electronic valve or booster pump 22a etc. which are operated by the output signal.

It describes a method for controlling the expansion tank system according to the present invention configured as described above.

First, as shown in FIGS. 4 and 5, the setting unit 40 sets an initial pressure range within a range allowed by the pipe circulation system, and detects the pressure in the pipe by the pressure sensor 14 to detect the detected value. A first step (100) of transferring to the microprocessor (60);

A second step (200) of comparing the signal value transmitted to the microprocessor (60) with the set value in the first step;

If the detected pressure value of the pressure sensor 14 in the first step 100 is greater than the set value, the microprocessor 60 is the electronic valve attached to the inlet line 21 until the pressure of the heating water reaches the set value range Opens (21a) to inflate the expansion water into the expansion tank (20), and if the pressure detected by the pressure sensor (14) is less than the set value, the microprocessor (60) on the discharge line (22) Operate the attached booster pump 22a to supply water in the expansion tank 20 to the separator 10, and when the level of water detected by the water level sensor 20a installed in the expansion tank 20 is lower than the reference value is expanded. The third step 300 of supplying external water into the expansion tank 20 until the water reaches the reference value by opening the electronic valve 25a of the water supply pipe 25 introduced into the tank 20 It is done.

An operation of the expansion tank system and the expansion tank system control method according to the present invention configured as described above will be described with reference to the accompanying drawings.

The pipe water discharged through the discharge pipe 12 of the water separator 10 is heat-exchanged through a heat exchanger (not shown) is heated and supplied to each home, and variously installed in the hot water or indoors After the heat exchange with the heating device is returned to the separator 10.

At this time, the heating water heated in the heat exchanger expands as the temperature increases, and as the volume of water increases, the pressure inside the pipe increases. When the pressure rises as described above, the pressure sensor 14 installed on the discharge pipe 12 of the separator 10 detects it and delivers it to the microprocessor 60.

The microprocessor 60 is the electronic valve 21a coupled on the inlet line 21 of the expansion tank 20 when the pressure value detected by the pressure sensor 14 is greater than the range of the initial pressure set through the setting unit 40. ) By applying an electrical signal to open the inlet line (21).

When the inlet line 21 is opened, the expansion water corresponding to the expansion pressure of the heating water is introduced into the expansion tank 20, wherein the air contained in the expansion tank 20 is an air passage tube by the incoming water ( It is discharged to outside through 24). As such, the stored water flowing into the expansion tank 20 by the opening of the inlet line 21 is introduced until the pressure reaches the set value.

On the contrary, when the pressure value detected by the pressure sensor 14 is lower than the set value, the microprocessor operates the booster pump 22a to pump water in the expansion tank 20 toward the separator 10. In this case, when the stored water in the expansion tank 20 is insufficient, that is, when the water level detected by the water level sensor 20a is less than the reference value, the water level sensor 20a transmits the signal to the microprocessor to supply water to the water supply pipe by the microprocessor. The electronic valve 25a of (25) is opened to allow water to flow into the expansion tank 20 from the outside, and the water is pumped into the separator 10.

As described above, the expansion tank system according to the present invention maintains the pressure in the pipe at a constant pressure by inflow or discharge of water into or out of the expansion tank 20 in response to the change in pressure caused by the temperature change of the pipe water in the pipe. It is also possible to supply a shortage of water to the pipe circulation system.

In case of the above-mentioned expansion tank, it is possible to employ both the case where rubber bladder is installed or not installed in the expansion tank. Because it can be confirmed, it can be possible to charge according to the usage.

As described above, the present invention operates in a state in which the pressure inside the expansion tank 20 is equal to atmospheric pressure, so that a pressure maintaining device such as a compressor is not required, and thus the operation of the system can be performed without interruption, and noise is also generated. Since it does not occur, the operating conditions are greatly improved and the facility cost can be reduced.

1 is a front view illustrating an expansion tank according to the present invention,

2 is a right side view illustrating an expansion tank according to the present invention;

3 is a left side view illustrating an expansion tank according to the present invention;

Figure 4 is a block diagram showing a process for controlling the expansion tank system according to the present invention,

5 is a flow chart showing a control process of the expansion tank system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Control panel 10: Separator

11: inlet tube 12: outlet tube

13: Air vent 14: Pressure sensor

20: expansion tank 20a: water level sensor

21: Inlet line 21a: Electron valve

22: discharge line 22a: booster pump

23a: Electronic valve 24: Tube for air passage

25: water supply pipe 25a: electronic valve

40: setting part 50: sensing part

60: microprocessor 70: output

100: first step 200: second step

300: third stage

Claims (4)

In the expansion tank system for reducing or adjusting the pressure in response to the pressure due to the thermal expansion of the pipe water, The air vent 13 provided in the upper portion, the inlet pipe 11 through which the circulated heating water flows in, and the discharge pipe 12 having the pressure sensor 14 for detecting the water pressure on the heating water discharge line is attached thereto. Separator 10 and including; The water level sensor 20a which detects the level of water in the interior and the detection value detected by the pressure sensor 14 on the line branched and branched from the discharge pipe 12 are compared with the detected value and the set value to detect than the set value. If the value is large, the inlet line 21 having the electronic valve 21a controlled by the microprocessor 70, and when the water level detected by the water level sensor 20a is below the reference value by the microprocessor 70 An expansion tank 20 having a controlled electronic valve 25a installed to open and close the passage, and having a water supply pipe 25 connected to the inlet line 21 and a tube 24 connected to the outside at an upper side thereof. Wow; The microprocessor 70 is connected to the expansion tank 20 so as to pump water in the expansion tank 20 toward the inlet pipe 11 when the pressure sensed by the pressure sensor 14 is lower than a set value. Expansion tank system for heating water pressure control, characterized in that consisting of a discharge line 22 is attached to the booster pump (22a) is controlled by. The expansion tank system for heating water pressure control according to claim 1, characterized in that a meter is attached to the water supply pipe (26) to measure the hydraulic pressure of the water. The expansion tank system for heating water pressure control of claim 2, wherein the expansion valve is provided with a bladder therein. After setting the super-pressure range to the range allowed by the pipe circulation system in the setting unit 40 and storing it, the pressure sensor 14 detects the pressure in the pipe and transfers the detected value to the microprocessor 60. A first step (100); A second step (200) of comparing the signal value transmitted to the microprocessor (60) with the set value in the first step; If the detected pressure value of the pressure sensor 14 in the first step 100 is greater than the set value, the microprocessor 60 is the electronic valve attached to the inlet line 21 until the pressure of the heating water reaches the set value range Opens (21a) to inflate the expansion water into the expansion tank (20), and if the pressure detected by the pressure sensor (14) is less than the set value, the microprocessor (60) on the discharge line (22) Operate the attached booster pump 22a to supply water in the expansion tank 20 to the pipe circulation system, but when the water level of the water level sensor 20a installed in the expansion tank 20 is less than the reference value, the expansion tank 20 For heating water pressure control, characterized in that consisting of a third step (300) to open the electronic valve (25a) of the water supply pipe 25 introduced into the water supply water into the expansion tank 20 until the water level reaches the reference value Expansion tank system control method.