KR102219427B1 - Equipment-protective compound pumping device and a heating and cooling system having thereof - Google Patents

Abstract

The present invention relates to a facility protection agent input device and a cooling and heating system having the same, wherein the facility protection agent input device is fixedly coupled to a facility protection agent storage tank and an upper part of the facility protection agent storage tank, and maintains a reference value at the pH concentration of the expanded water. A facility protection agent input pump that sucks the facility protection agent stored in the storage tank and puts it into the expansion tank of the cooling and heating system, and is installed at the inlet of the facility protection agent input pump, and is installed at the first valve and the outlet that are introduced into the facility protection agent storage tank. And a plurality of valves having a second valve, and a pH measuring sensor configured to measure a pH concentration of the expansion water of the expansion tank and to operate the facility protection agent injection pump according to the measured pH concentration.

Description

Equipment protection agent input device and air conditioning system equipped with it {EQUIPMENT-PROTECTIVE COMPOUND PUMPING DEVICE AND A HEATING AND COOLING SYSTEM HAVING THEREOF}

The present invention relates to a facility protection agent input device and a cooling and heating system technology having the same, and more particularly, to control the pressure of a cooling/heating pipe through separation of brackish water, and by introducing a facility protection agent according to the pH concentration of the incoming expansion water It relates to a facility protection agent input device capable of improving stable operation and cooling and heating efficiency by preventing and suppressing piping corrosion by managing the water quality of water, and a cooling and heating system having the same.

In the case of district heating and central heating type apartment houses, hot water generated from a boiler or heat exchanger is circulated for heating of each household to form a closed heating system that supplies heat.

The heating and cooling piping is made of a variety of metal materials such as carbon steel, cast iron, copper, aluminum, stainless steel, etc., and these metals can be corroded by corrosion factors such as dissolved oxygen, pH, etc. It is exposed to an environment where scale can form from the ingredients. The types of metal used in piping are shown in Table 1 below.

Sanitary piping
(Hot water, gold water) Air conditioning and heating piping Pumps, valves,
Connector, etc. Horizontal column, standing hall Heating coil Divider heat exchanger Stainless steel pipe
Copper pipe, PE pipe Black tube, white tube, copper tube, stainless steel tube Dongguan,
Excel tube Cast iron, copper,
aluminum copper,
Stainless steel Cast iron, carbon steel, brass

In addition, tap water or groundwater is used as cooling and heating water and supply water, and such water contains highly corrosive ions such as chlorine ions, and dissolved oxygen causing corrosion can be continuously introduced.

In addition, when the temperature of the heating water rises to 55~60℃, the chemical reaction speed increases, so the corrosiveness increases together, and the solubility of calcium (Ca) and magnesium (Mg), which are components of the scale, increases as the temperature increases. It decreases and the generation of scale increases.

Therefore, in order to suppress such a phenomenon, it is necessary to manage the water quality of the heating and cooling water.

Currently, Article 2 (8) of the Article 2 of the [Publication No. 2012-164 of the Ministry of Knowledge Economy] 『Standards for the installation of heating meters, etc. for centralized heating type apartments in accordance with Article 37 (3) of the Regulation on Housing Construction Standards, etc.』 In the machine room of the building, pumps and containers are installed so that the water treatment agent can be injected for the water quality management of the heating water, and in Article 4 (1), the apartment management entity inspects the heating water contamination inside the standing pipe at least once a year. If necessary, the heating water is circulated to replace part or whole, and measures such as injecting an appropriate amount of water treatment agent to maintain the proper hydrogen ion concentration (8.0) of the heating water, etc., and turbidity (10 FTU) to prevent other heating losses. Below), calcium hardness (less than 50mg/L), iron (less than 1mg/L), etc., are announced that water quality management can be carried out autonomously.

Accordingly, in apartment houses with district heating and central heating methods, the corrosion of various metals such as carbon steel, stainless steel, copper, aluminum, etc. is suppressed by injecting the equipment protection agent for the closed system system applied to the heating circulating water once or twice a year. We are doing maintenance for.

However, this method consumes maintenance costs for injecting a large amount of facility protection agent once or twice a year, especially in the case of apartments with a large number of residents, and rather than performing water quality management through periodic water quality analysis, it is 1-2 times a year. In most cases, facility protection agents are introduced before the summer and winter seasons to operate cooling or heating.

Korean Patent Publication No. 10-1303228 (2013.08.28) relates to a sealing-type heating water-based piping equipment protective agent composition, in the closed-type heating water-based piping equipment protective composition composed of a variety of metal equipment, PESA (Polyepoxyauccinic acid) or AMPS as a dispersant. 0.2 to 1.3 parts by weight of any one of the dispersants, 1.2 to 5 parts by weight of carbohydrazide as a deoxidant, 2 to 4 parts by weight of sodium nitrite as an anticorrosive, and 0.5 to 1.8 parts by weight of EDTA 4Na as a hardness inhibitor It is characterized in that it is prepared in a ratio of 0.8 to 1.5 parts by weight of MBT Na and 86.4 to 95.3 parts by weight of water (distilled water) as an anti-corrosion agent.

Korean Patent Publication No. 10-1110194 (2012.01.19) relates to an expansion gas separation device for a cooling and heating system, wherein an expansion tube equipped with a relief valve extends from the cooling and heating system to be connected to the expansion tank and installed, from the expansion tank. A pressure maintenance pump and a pressurized pipe equipped with a valve mechanism are extended to be connected to the air conditioning system, an overflow pipe and a supply water pipe are connected to the upper side of the expansion tank, and a vacuum crushing valve and a vacuum crushing valve are connected to the upper surface of the expansion tank. A gas removal valve is installed, and a water level sensor that controls the valve mechanism mounted on the supply water pipe and a spray nozzle installed at the end of the expansion pipe to spray the water for cooling and heating into fine particles are installed inside the expansion tank. And, in the expansion gas separation device of the vacuum degassing method in which a drain pipe equipped with a drain valve is connected and installed at a lower side of the expansion tank, a second expansion pipe equipped with a supply valve branch from the expansion pipe, and the second expansion pipe A pipe is connected to the dissolved oxygen remover, a return pipe equipped with a supply pump and a check valve is extended from the dissolved oxygen remover, and the return pipe is connected to the expansion tank, and the supply valve is a proportional controlled electric solenoid valve or Among the relief valves, an alternative valve is used, and the dissolved oxygen eliminator is a pressure tank equipped with an air vent, a water level sensor, and a drain means.

Korean Patent Registration No. 10-1303228 (2013.08.28) Korean Patent Registration No. 10-1110194 (2012.01.19)

An embodiment of the present invention is to install a facility protection agent in the expansion tank, block air contact and external mixing of the expanded water through a diaphragm tube (bladder) in the expansion tank, and insert the facility protection agent according to the pH concentration of the expansion water. It is intended to provide a facility protection agent input device and a cooling/heating system equipped with it to prevent and suppress piping corrosion by maintaining the proper hydrogen ion concentration of heating water and manage the water quality of heating and cooling water.

In one embodiment of the present invention, a facility protection agent injection device is installed in the expansion tank, and the dissolved oxygen contained in the expansion water is removed by separation of brackish water using the pressure difference between the expansion tank and the pipe, and the facility protection agent is injected according to the pH concentration of the expansion water. Therefore, it is intended to provide a facility protection agent input device and a cooling/heating system equipped with the same to suppress corrosion of pipes and manage water quality of heating and cooling water by maintaining the proper hydrogen ion concentration of heating water.

An embodiment of the present invention is to install a facility protection agent input device in the expansion tank, forcibly degas the dissolved oxygen in the piping water, remove foreign substances contained in the water treatment and piping water, and periodically add the facility protection agent to the proper hydrogen ions of the heating water. It is intended to provide a facility protection agent input device and a cooling/heating system equipped with the same, which prevents corrosion of pipes by maintaining the concentration and manages the water quality of heating and cooling water.

Among the embodiments, the facility protection agent input device is a facility protection agent storage tank, a cooling/heating system by inhaling the facility protection agent stored in the facility protection agent storage tank so as to be fixedly coupled to an upper part of the facility protection agent storage tank and maintain a reference value at the pH concentration of the expanded water. A plurality of valves including a facility protection agent injection pump injected into the expansion tank of the facility protection agent, a first valve installed at the inlet of the facility protection agent injection pump and introduced into the facility protection agent storage tank, and a second valve installed at the outlet, and And a pH measuring sensor configured to measure the pH concentration of the expansion water in the expansion tank and operate the facility protection agent injection pump according to the measured pH concentration.

The plurality of valves are installed at the suction side pipe inlet of the facility protection agent injection pump, and a strainer foot valve that blocks foreign substances from being sucked when the facility protection agent stored in the facility protection agent storage tank is sucked, and the discharge side of the facility protection agent injection pump It may include a siphon prevention check valve installed at the pipe outlet to prevent the siphon phenomenon and backflow to the pump.

Among the embodiments, in the cooling and heating system provided with a facility protection agent injection device, a diaphragm tube made of an elastic material is installed therein, and the inside is divided into an air chamber and a water chamber by the diaphragm tube, and the expansion water accommodated in the water chamber contacts external air. And an expansion tank to block mixing, a facility protection agent in the expansion tank so that the pH concentration of the expansion water is maintained at a reference value by measuring the pH concentration of the expansion water introduced into the expansion tank in real time. An automatic control panel that controls the facility protection agent input device according to the facility protection agent input device and the measured pH concentration of the expanded water to perform automatic injection of the facility protection agent and provides the user intuitively knowing the cooling and heating operation status. Includes.

A ventilation pipe and an automatic air discharge valve are respectively installed on the upper part of the expansion tank, and the inside of the expansion tank is maintained at atmospheric pressure by the ventilation pipe, so that when high-pressure expansion water is introduced into the diaphragm tube, the separated gas component is separated by brackish water. It may include an expansion water separator to discharge to the outside.

A vacuum pump is connected to the top of the expansion tank through a vacuum pipe, and an automatic air discharge valve is installed on the other side to forcibly lower the pressure in the space inside the expansion tank that is not filled with makeup water by the vacuum pump to generate a pressure difference. It may include an expansion gas separator for separating the gas component from the make-up water and discharging the separated gas component to the outside.

In the expansion gas separator, a vacuum sensor, a vacuum gauge, and a vacuum crushing valve are installed in the vacuum pipe, respectively, and when the detected pressure is reduced to a reference pressure or less by sensing the pressure in the space inside the expansion tank, some external air is introduced to vacuum Can be shredded.

It may include a magnetic water treatment unit for water treatment of the expanded water introduced through the expansion water inlet pipe through magnetic force.

It may include a centrifugal water treatment filter installed at the rear end of the magnetic water treatment device and separating and removing foreign substances contained in the self-water treated expanded water through centrifugal force and gravity.

The facility protection agent input device includes a facility protection agent storage tank, a facility protection agent injection pump that is fixedly installed on the facility protection agent and controls the pH concentration of the expansion water by injecting the facility protection agent stored in the facility protection agent storage tank into the expansion tank, A first valve consisting of a strainer foot valve that is connected to the facility protection agent injection pump and prevents foreign substances from inhaling when the facility protection agent stored in the facility protection agent storage tank is inhaled, and prevents reverse flow of the facility protection agent that is connected to the facility protection agent injection pump and discharged. A second valve comprising a siphon check valve, and a pH measurement sensor installed below the expansion tank and measuring a pH concentration of the expansion water introduced into the expansion tank in real time.

A system box installed at the bottom of the automatic control panel to accommodate a plurality of pipes, valves, and pumps, and in which the expansion water inlet pipe connected to the cooling and heating pipe and the supply water inlet pipe connected to the discharge pipe and the supply water pipe are installed at the top. It may include.

The disclosed technology can have the following effects. However, since it does not mean that a specific embodiment should include all of the following effects or only the following effects, it should not be understood that the scope of the rights of the disclosed technology is limited thereby.

The facility protection agent injection device and the cooling and heating system having the same according to an embodiment of the present invention install a facility protection agent injection device in the expansion tank, and periodically supply the facility protection agent even while the system is in operation to properly maintain the hydrogen ion concentration of the heating water, and Corrosion of the pipe is prevented by blocking water contact with air and external mixing, and the corrosion of the pipe can be suppressed by separating gas components contained in the expansion water using the pressure difference between the expansion tank and the pipe.

The facility protection agent injection device and the cooling and heating system provided with the same according to an embodiment of the present invention forcibly reduce the pressure in the space inside the expansion tank by a vacuum pump to easily separate the gas components contained in the expansion water introduced into the expansion tank. As a result, the separation effect of air is remarkably improved, and corrosion of the pipe is greatly suppressed, so that stable operation of the cooling and heating system can be achieved.

The facility protection agent injection device according to an embodiment of the present invention and a cooling/heating system equipped with the same are the scale of the pipe water recovered through water treatment by magnetic force and centrifugal separation in the expansion water inlet pipe leading the expansion water from the cooling and heating pipe to the expansion tank. And it is possible to remove foreign substances, it is possible to improve the cooling and heating efficiency.

The facility protection agent input device and the cooling/heating system equipped with the same according to an embodiment of the present invention measure the pH concentration of the expanded water introduced and add a facility protection agent so that the pH concentration is always maintained above the reference value, thereby providing efficient cooling and heating water quality. Through management, corrosion of heating and cooling pipes can be suppressed, and pipe replacement costs are reduced, maintenance costs are reduced, and heat exchanger hot plate cleaning cycles are extended.

Accordingly, the present invention prevents the occurrence of foreign matter due to corrosion and scale in the pipe, so that the failure of the flow part of the household heat metering device is reduced, the strainer clogging is reduced, and the constant flow valve sticking phenomenon is reduced, and the heat exchanger and coil heat transfer efficiency are increased to provide heating. Since the temperature can be lowered, joint heating costs due to reduction of heat loss can be reduced, and power costs can be reduced by increasing heat transfer capability.

In addition, by integrating the water treatment function into one of the expansion gas separators, the overall equipment can be miniaturized by increasing space utilization in the machine room and simplifying piping.

1 to 3 are a front cross-sectional view, a side cross-sectional view, and a plan view showing a first embodiment of a cooling and heating system having a facility protection agent injection device according to an embodiment of the present invention.
4 and 5 are a perspective view and an exploded perspective view showing the facility protection agent input device in FIG. 1.
6 is a diagram schematically illustrating a cooling and heating system to which a compressor-attached hermetic expansion tank is applied according to an exemplary embodiment.
7A to 7F are exemplary views of a touch screen screen of the automatic control panel according to the operation of the cooling and heating system shown in FIG. 6.
8 to 10 are a front cross-sectional view, a side cross-sectional view, and a plan view showing a second embodiment of a cooling and heating system having a facility protection agent injection device according to an embodiment of the present invention.
11 is a diagram schematically illustrating a cooling and heating system to which an expansion water separator is applied according to an exemplary embodiment.
12A to 12I are exemplary views of a touch screen screen of an automatic control panel according to an operation of the cooling and heating system of FIG. 11.
13 to 15 are a front cross-sectional view, a side cross-sectional view, and a plan view showing a third embodiment of a cooling and heating system having a facility protection agent injection device according to an embodiment of the present invention.
16 is a diagram schematically illustrating a cooling and heating system to which an expanded gas separator is applied according to an exemplary embodiment.
17A to 17J are exemplary views of a touch screen screen of the automatic control panel according to the operation of the cooling and heating system of FIG. 16.

Since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be variously changed and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only those effects, the scope of the present invention should not be understood as being limited thereto.

Meanwhile, the meaning of terms described in the present application should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when it is mentioned that a certain component is "directly connected" to another component, it should be understood that no other component exists in the middle. On the other hand, other expressions describing the relationship between the constituent elements, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as “comprise” or “have” refer to implemented features, numbers, steps, actions, components, parts, or It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in commonly used dictionaries should be construed as having meanings in the context of related technologies, and cannot be construed as having an ideal or excessive formal meaning unless explicitly defined in the present application.

1 to 3 are diagrams showing a first embodiment of a cooling and heating system equipped with a facility protection agent injection device according to an embodiment of the present invention, in particular, a front cross-sectional view, a side cross-sectional view and a side cross-sectional view showing a compressor-attached hermetic expansion tank. It is a plan view.

1 to 3, the compressor-attached hermetic expansion tank 100 includes a tank body 110, an automatic control panel 120, an air compressor 130, and a facility protection agent input device 140. .

The tank body 110 may be made of a pressure container made of steel or composite material having a certain strength while forming the entire exterior of the expansion tank 100 and having an empty inside. The tank body 110 includes a diaphragm tube 111 that is fixedly arranged vertically and vertically, and an expansion water inlet/discharge pipe 113 is provided at the top to accommodate the incoming expansion water in the diaphragm tube 111 And the expansion water accommodated in the diaphragm tube 111 may be discharged through the expansion water inlet/discharge pipe 113. The tank body 110 is divided into an air chamber filled with a compressible fluid such as air and a water chamber in which the expansion water is introduced and stored by the diaphragm tube 111.

The diaphragm tube 111 may be made of a material having excellent elasticity, such as rubber, so that it can expand and contract. The diaphragm tube 111 is connected to the expansion water inlet/discharge pipe 113 therein, and a hose 115 may be installed to allow the expansion water to be introduced or discharged into the interior. In this case, the hose 115 may be made of the same rubber material as the diaphragm tube 111.

The expanded water inlet/discharge pipe 113 is connected to a cooling/heating pipe (not shown) of a cooling and heating system to allow the pipe water (expanded water) to be introduced or discharged into the tank body 110. Here, the expansion water refers to the number of pipes expanded by the temperature of the pipe, and hereinafter, the number of pipes and the expansion water are used interchangeably depending on the situation, but it will be revealed that they have the same meaning.

The hose 115 is installed inside the diaphragm tube 111 and plays a role of making it easier to discharge the expansion water due to a pressure difference like the straw principle even when the water level inside the diaphragm tube 111 is very low.

The tank body 110 has a pressure sensor 117 installed at the top, and a drain nozzle 119 installed at the bottom.

The pressure sensor 117 serves to sense the pressure of the air chamber inside the tank body 110 formed by being partitioned by the diaphragm tube 111.

The drain nozzle 119 is always closed with a screw plug fastened, but when the diaphragm tube 111 is damaged, open the fastened screw plug to drain the expanded water flowing into the air chamber before the diaphragm tube 111 is replaced. This makes it possible to smoothly perform the replacement work of the diaphragm tube 111.

The automatic control panel 120 is attached and installed outside the tank body 110 and includes a touch screen 121 to monitor the operation operation and operation state of the cooling and heating system.

The air compressor 130 is attached and installed outside the tank body 110 and can be connected to the tank body 110 through an air pipe 131 to inject air into the air chamber inside the tank body 110. Since the air compressor 130 is attached to the tank body 110, it is possible to eliminate the hassle of moving with separate equipment for injecting and discharging air at each installation site of the expansion tank 100.

The air compressor 130 includes a residual pressure removal valve 133, a damage detection sensor 135, an air discharge valve 137 and a drain valve 139.

The residual pressure removal valve 133 is installed between the air compressor 130 and the air pipe 131 and serves to remove the residual pressure due to the compressed air remaining in the air pipe 131 after the air compressor 130 starts and stops. .

The breakage detection sensor 135 serves to detect the breakage of the diaphragm tube 111 by detecting the expansion water overflowing through the air pipe 131 due to the breakage of the diaphragm tube 111.

The air discharge valve 137 serves to lower the air chamber pressure by forcibly discharging air from the air chamber in the tank body 110.

The drain valve 139 serves to manually discharge condensed water from the air compressor 130.

The facility protectant input device 140 includes a facility protectant storage tank 141, a facility protectant injection pump 143, a plurality of valves 145, and a pH measuring sensor 147.

The facility protection agent storage tank 141 means a facility protection agent storage container.

Facility protection agent is a corrosion inhibitor for sealing applied to the heating circulating water (heating secondary side) installed in central heating and district heating system buildings and apartments, and is made of various metals such as carbon steel, stainless steel, copper, aluminum, etc. by injection once or twice a year. It is an exclusive water treatment agent that can minimize the cost of facility repair and maintenance due to corrosion rupture by exerting excellent corrosion inhibitory effect on the skin. The facility protection agent prevents the occurrence of foreign substances due to corrosion and scale in the pipe through the formation of a passivation film, an oxide film, and an adsorption film. Here, the formation of the passivation film oxidizes the metal to passivate a more dense crystal structure than the original crystal structure to form a strong anticorrosive film. In the formation of an oxide film, some components of the corrosion inhibitor adsorbed on the iron surface form an adsorbed product with Fe ²⁺ ions, which are oxidized by dissolved oxygen to form an insoluble film. In the formation of an adsorption film, a corrosion inhibitor directly adsorbs to the metal surface to form a film, thereby forming a non-conductive film that is blocked from water. Table 2 below shows the ideal heating water quality management standards in Notification No. 2012-164 of the Ministry of Knowledge Economy.

In one embodiment, the cooling/heating facility protection agent is a drug developed to enable water quality management as described above, and is a drug that simultaneously treats not only pH control but also anticorrosive action. In fact, the pH range of corrosion inhibition by metal is 11 to 11.8 for carbon steel, 7 for aluminum, 8.5 to 9.2 for copper, and 11 to 11.8 for stainless steel. In the case of corrosion inhibitors that depend only on pH, all metals cannot be covered. On the other hand, facility protection agents are products developed for a variety of metals.

The facility protection agent injection pump 143 serves to inject the facility protection agent contained in the facility protection agent storage tank 141 into the tank body 110 by the pump operation.

The plurality of valves 145 includes a first valve 145a installed at an inlet of a suction side pipe of the facility protection agent injection pump 143 and a second valve 145b installed at an outlet of the discharge side pipe. Here, the first valve 145a may be a strainer foot valve, and the second valve 145b may be implemented as a siphon check valve.

The pH measuring sensor 147 is installed at a lower side of the tank body 110 and measures the pH concentration of the expanded water introduced into the tank body 110. Here, when the pH concentration measured by the pH measurement sensor 147 is detected to be low below the reference value, the facility protection agent injection pump 143 operates to allow the facility protection agent stored in the facility protection agent storage tank 141 to be injected. do. In one embodiment, when the facility protection agent is added by measuring the pH concentration, the input amount may be calculated through the following equation.

[Equation 1]

Heating water facility protection agent input = heating acreage x 5kg x 0.02 (use concentration 2ppm)

For example, if the heating area is 32 pyeong, 3.2 kg of facility protection agent can be added.

FIG. 4 is a perspective view showing the facility protection agent input device 140 in FIG. 1, and FIG. 5 is a view showing a combined state of the facility protection agent storage tank 141 and the facility protection agent injection pump 143 shown in FIG. 4.

Referring to FIGS. 4 and 5, in the facility protection agent input device 140, the facility protection agent storage tank 141 and the facility protection agent injection pump 143 are fixedly coupled to each other through a fastening member 150 such as a bolt.

The facility protection agent storage tank 141 is in the form of a substantially rectangular container with an empty inside, and is configured to be stored therein by injecting the facility protection agent through a lid at the top. A facility protection agent injection pump 143 is fixedly coupled to the upper surface of the facility protection agent storage tank 141 through a fastening member 150. A plurality of valves 145 are connected to the facility protectant injection pump 143, and a first valve 145a of the plurality of valves 145 is introduced into the facility protectant storage tank 141 and a second valve 145b ) Is connected to the pipe on the side of the tank body 110.

6 is a diagram schematically showing a cooling and heating system to which the sealed expansion tank 100 is applied according to an embodiment, and FIGS. 7A to 7F are a touch screen of an automatic control panel showing the state of the expansion tank according to the operation of the cooling and heating system in FIG. This is an example of a screen displayed on.

In general, district cooling and heating is activated in the cooling and heating system. District cooling and heating is a heat source facility concentrated in residential, commercial, and public customers in a city or a certain area (e.g., a combined heat and power plant), and separate heat production facilities (oil, gas boilers) ), it is possible to efficiently manage energy by supplying the heat economically produced from the centralized heat source facility through the pipe network, so that the maximum effect can be achieved by using the minimum amount of energy.

As shown in FIG. 6, such a cooling and heating system supplies and recovers the heat medium, that is, the cooling and heating water produced in the heat source facility, through a circulation piping system. Here, water, which is mainly used as a heat medium, is heated with medium-temperature water of about 115°C, due to the characteristics of district heating and cooling, and is circulated through a pipe. At this time, the medium hot water (115°C) supplied from the district heating side is heat-exchanged with heating water of about 60°C in a heat source facility such as a boiler or heat exchanger, and then supplied to the heating and cooling household. The heating water supplied to the heating/cooling household is returned to 40~45℃ after the household heating, and then returned to the heat exchanger through a circulation pump and resupplied. At this time, the expansion water generated at the suction front end of the circulation pump is connected to the sealed expansion tank 100 attached to the compressor according to an embodiment, and the expansion water is repeatedly sucked or recovered, and the pipe pressure is appropriately adjusted. One side of the expansion water inlet/discharge pipe 113 that allows the pipe water to be expanded in the heating return pipe to enter the sealed expansion tank 100 with a compressor according to an embodiment or to reduce the pipe water back to the heating return pipe A supply water inlet pipe that is supplied through the tap water or groundwater is connected when cooling and heating water is insufficient due to leakage or the like.

In one embodiment, when the expansion tank 100 is initially installed, the diaphragm tube 111 installed inside the tank body 110 is contracted to have nothing, and at this time, the automatic control panel 120 is shown in FIG. 7A on the touch screen 121. By displaying the operation preparation screen as described above, the administrator sets the pressure so that the compressed air can be filled in the air chamber in the tank body 110 up to the set pressure through the air compressor 130.

7A, date and time information is displayed on the touch screen 121, the set pressure and the current pressure are displayed, the tank water level is displayed as a percentile, the pH concentration of the expanded water is displayed, and the air in the air compressor 130 In fact, it indicates that compressed air is being injected so that the manager can monitor the readiness for operation.

The automatic control panel 120 stops the start of the air compressor 130 when the current pressure in the air chamber in the tank body 110 is filled to the set pressure. At this time, as shown in FIG. 7B, the screen of the touch screen 121 displays a numerical value of the current pressure so that the administrator can know that the set pressure has been reached.

On the other hand, when the temperature of the heating water increases in the system cooling and heating operation state, the cooling water expands and the pressure of the heating and cooling pipe increases. At this time, when the heating water pressure rises above the set pressure, the expansion water is drawn into the diaphragm tube 112 installed inside the tank body 110 of the expansion tank 100 according to an embodiment, and the water chamber volume in the tank body 110 is While increasing, the air chamber volume decreases. At this time, the automatic control panel 120 opens the air discharge valve 137 when the pressure in the air chamber in the tank body 110 is higher than the set pressure to forcibly discharge air to the set pressure, and then opens the air discharge valve 137. Make it possible to close it. The automatic control panel 120 displays the current pressure, the tank water level, and the pH concentration of the expanded water on the touch screen 121 as shown in FIGS. 7C and 7D, allowing the manager to monitor the pressure of the heating and cooling pipe, the tank water level, and the pH concentration of the expanded water. In addition to being able to do so, it makes it possible to monitor the pressure regulation.

At this time, when the pH concentration of the expanded water introduced into the tank body 110 is measured in real time through the pH measuring sensor 147, and the measured pH concentration of the expanded water is less than a reference value, for example, pH 8-10 The facility protectant input pump 143 of the facility protectant input device 140 is operated to suck the heating water facility protectant stored in the chemical tank 141 and put it into the tank body 110. Here, a strainer foot valve 145a is installed at the suction-side pipe inlet of the facility protection agent injection pump 143 to block foreign substances inside the facility protection agent from being sucked. In addition, a siphon prevention check valve 145b is installed on the supply side of the facility protection agent injection pump 143 to prevent the siphon phenomenon and reverse flow to the pump. When the pH concentration of the expanded water measured in real time by the pH measurement sensor 147 rises above the reference value due to the input of the facility protection agent, the facility protection agent injection pump 143 is stopped to stop the facility protection agent input.

When the heating water temperature decreases and the heating water contracts while the system cooling/heating operation is stopped, when the pressure of the heating/cooling pipe falls below the set pressure, the expanded water inside the diaphragm tube 111 is discharged to the cooling/heating pipe due to a pressure difference. Accordingly, as the expansion water level inside the diaphragm tube 111 decreases, the volume of the water chamber decreases, and the volume of the air chamber increases, so that the pressure in the air chamber decreases. At this time, when the automatic control panel 120 detects the pressure drop in the air chamber by the pressure sensor 117, the air compressor 130 is activated to inject compressed air into the air chamber to increase the pressure in the air chamber to the set pressure. . As shown in Figs. 7e and 7f, as the air-conditioning pipe pressure decreases, expansion water is discharged to the touch screen 121, and as the tank level drops to 40%, the current pressure in the air chamber is lower than the set pressure of 5.0 kg/cm 2. A state of descending to kg/cm2 is displayed, and compressed air is drawn up to the set pressure by starting the air compressor 130 to indicate that the current pressure has reached the set pressure.

During the system cooling and heating operation, the pressure control and facility protection agent are repeatedly applied according to the pressure and temperature of the cooling/heating water to ensure stable operation.

On the other hand, the residual pressure removal valve 133 installed at the front end of the air compressor 130 removes residual compressed air after starting and stopping the air compressor 130 to prevent excessive high pressure air from being introduced when the air compressor 130 is restarted. do.

On the other hand, when the diaphragm tube 111 is damaged, the damage detection sensor 135 detects moisture in which the expanded water contained in the diaphragm tube 111 overflows through the air pipe 131 to prevent damage of the diaphragm tube 111. Can be detected. The automatic control panel 120 sounds an alarm through an alarm when the breakage detection sensor 135 detects the breakage of the diaphragm tube 111 so that the manager can recognize the breakage of the diaphragm tube 111 and replace it.

8 to 10 are diagrams showing a second embodiment of a cooling/heating system equipped with a facility protection agent injection device according to an embodiment of the present invention, and illustrating a case applied to an expansion water separator that maintains a pipe pressure of a cooling and heating system. It is a cross-sectional view, a side cross-sectional view, and a plan view.

8 to 10, the expansion water separator 200 includes an expansion tank 210 for storing expansion water, an automatic control panel 220, a system box 230 and equipment in which various pipes, valves, and pumps are accommodated. It is configured to include a protective agent input device 240.

In the expansion tank 210, when the pressure rises or falls due to thermal expansion or contraction of the pipe water according to the temperature change in the pipe, the temperature increases and the volume of water is stored or when the pressure in the pipe decreases, the water escapes. It serves to degas the air.

The expansion tank 210 includes a diaphragm tube (bladder) 211 that is installed inside a space, and allows the incoming expansion water to be kept sealed at all times without contacting external air, and water is stored therein to become a water chamber. It is composed by An automatic air discharge valve 213 and a ventilation pipe 215 are installed in the upper part of the expansion tank 210, and an automatic drain valve 217 and a level sensor 219 are installed in the lower part.

The level sensor 219 serves to detect the water level of the expansion tank 210.

Here, the automatic drain valve 217 is automatically opened when the water level of the expansion tank 210 sensed by the level sensor 219 rises by 80% or more and discharges the incoming expansion water to the outside so that the water level can be adjusted. do.

The automatic control panel 220 includes an operation control and operation status display function of the cooling and heating system according to the manager's operation. The automatic control panel 220 includes a touch screen 221. In an embodiment, the automatic control panel 220 may perform a function of controlling the level of the expansion tank, controlling the pressure, and controlling the pH concentration of the expanded water, and displaying a pipe pressure, a tank level, and a pH concentration.

The system box 230 includes a plurality of pipes 310, valves 320, a pressure sensor 330, and an expanded water discharge pump 340.

The plurality of pipes 310 includes an expansion water inlet pipe 311, a discharge pipe 313, and a replenishment water inlet pipe 315.

The plurality of valves 320 include strainers 321 and 322, flow control valves 323 and 324, automatic pressure expansion water control valve 325, pressure reducing valve 326, automatic supply water control valve 327, and check valve 328. And it is configured to include a bypass (By-Pass) valve (329).

The strainers 321 and 322 are installed in the expansion water inlet pipe 311 and the replenishment water inlet pipe 315, respectively, and serve to prevent the inflow of foreign substances in the incoming expansion water and the replenishment water.

The flow control valves 323 and 324 are installed in the expansion water inlet pipe 311 and the discharge pipe 313, respectively, and serve to adjust the flow rate of the expansion water to be introduced and discharged.

The automatic pressure expansion water control valve 325 is opened when the pressure in the pipe is sensed above the set pressure so that the high pressure expansion water is drawn into the atmospheric expansion tank 210. At this time, the dissolved gas is degassed in the expansion tank 210 according to Henry's law and is collected in the upper part of the tank. The air that has been degassed and collected on the top of the expansion tank 210 is discharged through the air discharge valve 213.

The relief valve 326 reduces tap water or groundwater supplied through a high-pressure pump, such as a booster pump, to an appropriate pressure and supplies it to the expansion tank 210, thereby providing a plurality of pipes 310 and a plurality of valves. 320) plays a role of preventing damage by high-pressure supply water.

The automatic supply water control valve 327 is opened when the cooling and heating water is insufficient and serves to supply the tap water or ground water introduced through the supply water inlet pipe 315.

The check valve 328 is connected to the expansion water discharge pipe 313 and serves to protect the expanded water discharge pump 340 by preventing the discharged expansion water from flowing back to the expansion water discharge pump 340.

The bypass valve 329 is connected between the supply water inlet pipe 315 and the expansion water discharge pipe 313, and the expansion machine separator 200 is operated according to various situations such as abnormal high pressure in the pipe, power failure in the machine room, washing of the cooling and heating pipe, etc. When it is stopped and emergency operation is inevitable, it is opened manually to supply insufficient water to the heating and cooling pipes. When the bypass valve 329 is opened, supply water is directly supplied to the cooling/heating pipe without passing through the expansion water separator 200, so that smooth operation of the cooling and heating system can be achieved.

The pressure sensor 330 detects the pressure in the pipe to adjust the pressure of the heating and cooling water.

The expanded water discharge pump 340 serves to reduce the expanded water through a cooling and heating pipe.

The facility protection agent input device 240 is configured in the same manner as those shown in FIGS. 4 and 5. That is, the facility protection agent input device 240 includes a facility protection agent storage tank 241 for storing the cooling/heating facility protection agent, the facility protection agent injection pump 243, a plurality of valves 245 and a pH measuring sensor 247. Is composed.

The facility protection agent storage tank 241 refers to a container for storing the cooling/heating facility protection agent.

The facility protection agent injection pump 243 serves to inject the facility protection agent stored in the facility protection agent storage tank 241 into the expansion tank 210 by a pump operation.

The plurality of valves 245 includes a first valve 245a installed at an inlet of the suction side pipe of the facility protection agent injection pump 243 and a second valve 245b installed at an outlet of the discharge side pipe. Here, the first valve 245a may be a strainer foot valve, and the second valve 245b may be implemented as a siphon check valve.

The pH measuring sensor 247 is installed at one side of the lower portion of the expansion tank 210 and measures the pH concentration of the expanded water introduced into the expansion tank 210. Here, when the pH concentration measured by the pH measurement sensor 247 is detected to be low below the reference value, the facility protection agent injection pump 243 is operated to allow the facility protection agent stored in the facility protection agent storage tank 241 to be injected. do.

FIG. 11 is a diagram schematically showing a cooling and heating system to which the expansion water separator 200 is applied, and FIGS. 12A to 12I are a state in which the pressure of the cooling and heating pipe is adjusted through the expansion water separator of the cooling and heating system in FIG. 11 Is an example screen showing on the touch screen of the automatic control panel.

In FIG. 11, the heating and cooling system supplies and recovers the heating medium, that is, the heating and cooling water, made in the heat source facility through the circulation piping system. Here, water, which is mainly used as a heat medium, is heated with medium-temperature water of about 115°C, due to the characteristics of district heating and cooling, and is circulated through a pipe. At this time, the medium hot water (115°C) supplied from the district heating side is heat-exchanged with heating water of about 60°C in a heat source facility such as a boiler or heat exchanger, and then supplied to the heating and cooling household. The heating water supplied to the heating/cooling household is returned to 40~45℃ after the household heating, and then returned to the heat exchanger through a circulation pump and resupplied. At this time, the expansion water generated at the suction front end of the circulation pump is connected to the expansion water separator 200 according to an embodiment, and the expansion water is repeatedly sucked or recovered, and the pipe pressure is appropriately adjusted. The number of pipes expanded from the heating return pipe is the expansion water inlet pipe 311 that is introduced into the expansion water separator 200, the expansion water discharge pipe 313 that reduces the pipe water back to the heating return pipe, and cooling and heating water due to leakage, etc. It consists of a supply water inlet pipe 315 that is supplied through tap water or groundwater in case of shortage.

In one embodiment, when the heating and cooling system is started, the automatic control panel 220 may display the current state on the touch screen 221 as shown in FIG. 12A. 12A, date and time information is displayed on the screen of the touch screen 221, the set pressure and the current pressure are displayed, and the tank level and the pH concentration of the expanded water are displayed, allowing the manager to determine the current pressure, water level, and pH concentration. Let you know.

When the heating of the cooling/heating system is started, the temperature of the heating water rises as the heat exchanger operates, and the heating water expands accordingly, thereby increasing the pressure of the heating and cooling pipe. At this time, the pressure sensor 330 measures the pressure of the heating/cooling pipe in real time and provides it to the automatic control panel 220. The automatic control panel 220 displays the current pressure measured by the pressure sensor 330 on the touch screen 221 screen as shown in FIG. 12B, and when the current pressure is higher than the set pressure, the automatic pressure expansion water control valve 325 ) Is opened and the expanded heating water is introduced through the expansion water inlet pipe 311 to be introduced into the expansion tank 210 to adjust the pipe pressure. Here, when the high-pressure expansion water is introduced into the atmospheric expansion tank 210, the dissolved gas is degassed according to Henry's law. The expansion tank 210 may be maintained at atmospheric pressure through the ventilation pipe 215.

Henry's law is the law that the mass of a gas dissolved in a volume of liquid solvent at a constant temperature, that is, solubility, is proportional to the partial pressure of the gas in equilibrium with the solvent.

The dissolved gas degassed in the expansion tank 210 is collected upward and discharged through the automatic air discharge valve 213.

Meanwhile, as the expansion water in the expansion tank 210 is introduced, the tank level rises. At this time, the level sensor 219 and the pH measurement sensor 247 measure the level of the tank and the pH concentration of the expanded water in real time and provide it to the automatic control panel 220. The automatic control panel 220 displays the tank water level and pH concentration measured by the level sensor 219 and the pH measurement sensor 247, respectively, on the touch screen 221 screen, allowing the administrator to monitor the tank water level and the pH concentration of the expanded water. Make it possible. The automatic control panel 220 operates the facility protection agent injection pump 243 when the pH concentration of the expanded water is less than the standard value, that is, pH 8-10, so that the facility protection agent is injected so that the pH concentration of the expanded water is maintained at the reference value.

When the pH concentration of the expanded water measured by the pH measurement sensor 247 maintains the reference value, the automatic control panel 220 stops the operation of the facility protection agent injection pump 243 to stop the facility protection agent input. At this time, on the screen of the touch screen 221, as shown in FIG. 12C, it is displayed that the current pH concentration has been adjusted to a reference value, that is, pH 9.5.

Meanwhile, as shown in FIG. 12D, when the pressure of the heating and cooling pipe is lowered from 5.0kg/cm2, which is the set pressure, to 4.0kg/cm2, the expansion water discharge pump 340 is operated to discharge the expansion water to adjust the heating and cooling pipe pressure. As shown in FIG. 12E, when the heating and cooling pipe pressure reaches the set pressure, the expansion water discharge pump 340 is stopped. As shown in FIG. 12F, when abnormal high pressure in the heating/cooling pipe is detected by the pressure sensor 330, the automatic pressure expansion water control valve 325 is opened to introduce the expansion water to adjust the pressure. At this time, the water level rises due to the introduction of the expansion water into the expansion tank 210. As shown in FIG. 12F, when the water level rises by 80% or more due to excessive expansion water intake, the automatic control panel 220 sounds a full water level alarm and opens the automatic drain valve 217 below the expansion tank 210 to discharge the expansion water. Accordingly, the automatic drain valve 217 is closed after adjusting the water level so that the tank level can be maintained below 80%.

On the contrary, as shown in FIG. 12G, when the water level inside the expansion tank 210 becomes 18% or less after the expansion water is reduced to the cooling and heating pipe through the expansion water discharge pipe 313 and the expansion water discharge pump 340, the automatic control panel 220 At the same time as the low water level alarm sounds, the automatic supply water control valve 327 is opened, and supply water is introduced into the expansion tank 210 until the water level reaches 18% or more through the supply water inlet pipe 315. As shown in FIG. 12H, when the tank water level is 18% or more, the automatic replenishing water control valve 327 is closed. Here, as the supply water, tap water or groundwater is used. At this time, the pH concentration of the expanded water decreases due to the filling water. Accordingly, the pH concentration of the expanded water is measured in real time through the pH measuring sensor 247, and when the measured pH concentration of the expanded water is less than a reference value, for example, pH 8-10, the facility protection agent input device 240 The facility protection agent injection pump 243 is operated to suck the heating water facility protection agent stored in the chemical tank 241 and put it into the expansion tank 210. Here, a strainer foot valve 245a is installed at the inlet of the suction side pipe of the facility protection agent injection pump 243 to block foreign substances inside the facility protection agent from being sucked. In addition, a siphon prevention check valve 245b is installed on the supply side of the facility protection agent injection pump 243 to prevent the siphon phenomenon and reverse flow to the pump. When the pH concentration of the expanded water measured in real time by the pH measurement sensor 247 rises above the reference value due to the input of the facility protection agent, the facility protection agent injection pump 243 is stopped to stop the facility protection agent input. As shown in FIG. 12I, the touch screen 221 displays that the current pH concentration is maintained as the reference value.

13 to 15 are views showing a third embodiment of a cooling/heating system having a facility protection agent injection device according to an embodiment of the present invention, and are front, side, and plan views illustrating a case applied to an inflation gas separator. .

13 to 15, the inflation gas separator 400 includes an expansion tank 410 for storing inflation water, an automatic control panel 420, a system box 430 and equipment in which various pipes, valves, and pumps are accommodated. It is configured to include a protective agent input device 440.

In the expansion tank 410, when the pressure rises or falls due to thermal expansion or heat contraction of the pipe water according to the temperature change in the pipe, the temperature increases and the volume of water is stored or when the pressure in the pipe decreases, the water escapes. It serves to degas the air.

The expansion tank 410 is equipped with an automatic air discharge valve 411, a level sensor 412, a vacuum sensor 413, a vacuum gauge 414 and a vacuum crushing valve 415 at the top, and an inspection hole 416 and an automatic A drain valve 417 is installed.

The automatic air discharge valve 411 serves to discharge gas components separated from the make-up water to the outside due to a pressure difference in the expansion tank 410.

The level sensor 412 detects the level of the tank, and the vacuum sensor 413 and the vacuum gauge 414 detect the pressure in the internal space of the expansion tank 410 where the make-up water is not filled in the upper part of the expansion tank 410. do. The vacuum crushing valve 415 serves to prevent damage to the expansion tank 410 due to overvacuum by crushing the vacuum by introducing a part of external air when the pressure in the space inside the expansion tank 410 is reduced below the reference pressure. do.

Here, the automatic drain valve 417 is automatically opened when the water level of the expansion tank 410 sensed by the level sensor 412 rises by 80% or more and discharges the incoming expansion water to the outside so that the water level can be adjusted. do.

The automatic control panel 420 includes an operation control and operation status display function of the cooling/heating system according to a manager's operation. The automatic control panel 420 includes a touch screen 421. In one embodiment, the automatic control panel 420 may perform a function of controlling the level of the expansion tank, controlling the pressure, and controlling the pH concentration of the expanded water, and displaying a pipe pressure, a tank level, and a pH concentration.

The system box 430 includes a plurality of pipes 510 and valves 520, a pressure sensor 530, a plurality of pumps 540, and a magnetic water treatment device 550 and a centrifugal water treatment filter 560. It consists of including.

The plurality of pipes 510 includes an expanding water inlet pipe 511, a discharge pipe 513, and a replenishing water inlet pipe 515.

The plurality of valves 520 include strainers 521 and 522, flow control valves 523 and 524, automatic pressure expansion water control valve 525, pressure reducing valve 526, automatic supply water control valve 527, and check valve 528. And it is configured to include a bypass (By-Pass) valve (529).

The strainers 521 and 522 are installed in the expansion water inlet pipe 511 and the replenishment water inlet pipe 515, respectively, and serve to prevent the introduction of foreign substances in the incoming expansion water and the replenishment water.

The flow rate control valves 523 and 524 are installed in the expansion water inlet pipe 511 and the discharge pipe 513, respectively, and serve to adjust the flow rate of the expansion water to be introduced and discharged.

The automatic pressure expansion water control valve 525 is opened when the pressure in the pipe is detected above the set pressure so that the high pressure expansion water is drawn into the atmospheric expansion tank 410. At this time, the dissolved gas is degassed in the expansion tank 410 according to Henry's law and is collected in the upper part of the tank. The air that is degassed and collected in the upper expansion tank 410 is discharged through the air discharge valve 413.

The relief valve 526 decompresses tap water or groundwater supplied through a high-pressure pump such as a booster pump to an appropriate pressure and supplies it to the expansion tank 410, thereby providing a plurality of pipes 510 and a plurality of valves. 520) plays a role of preventing damage by high-pressure supply water.

The automatic supply water control valve 527 is opened when the cooling and heating water is insufficient and serves to supply the tap water or groundwater introduced through the supply water inlet pipe 515.

The check valve 528 is connected to the expansion water discharge pipe 513 and serves to protect the expanded water discharge pump 543 by preventing the discharged expansion water from flowing backward to the expansion water discharge pump 543.

The bypass valve 529 is connected between the supply water inlet pipe 515 and the expansion water discharge pipe 513, and the expansion gas separator 400 is operated according to various situations such as abnormal high pressure in the pipe, power failure in the machine room, washing of the heating and cooling pipe, etc. When it is stopped and emergency operation is unavoidable, it is opened manually so that insufficient water can be supplied to the heating and cooling pipe. When the bypass valve 529 is opened, supply water is directly supplied to the cooling/heating pipe without passing through the expansion gas separator 400, so that smooth operation of the cooling and heating system can be promoted.

The pressure sensor 530 detects the pressure in the pipe to adjust the pressure of the heating/cooling water.

The plurality of pumps 540 includes a vacuum pump 541 and an expanded water discharge pump 543. Here, the vacuum pump 541 is connected to the upper portion of the expansion tank 410 through a vacuum pipe and serves to forcibly lower the pressure of the inner space of the expansion tank 410 in which the make-up water is not filled. The expanded water discharge pump 543 serves to reduce the expanded water through a cooling and heating pipe.

The magnetic water treatment device 550 is installed in the expanded water inlet pipe 511 and serves to treat the cooling and heating water introduced by expansion using magnetic force.

The centrifugal water treatment filter 560 serves to separate foreign substances contained in the self-water treated pipe water using centrifugal force and gravity.

The facility protection agent injection device 440 includes a facility protection agent storage tank 441 for storing the cooling/heating facility protection agent, a facility protection agent injection pump 443, a plurality of valves 445, and a pH measurement sensor 447. .

The facility protection agent storage tank 441 means a container for storing the cooling/heating facility protection agent.

The facility protection agent injection pump 443 serves to inject the facility protection agent stored in the facility protection agent storage tank 441 into the expansion tank 410 by a pump operation.

The plurality of valves 445 includes a first valve 445a installed at an inlet of a suction side pipe of the facility protection agent injection pump 443 and a second valve 445b installed at an outlet of a discharge side pipe. Here, the first valve 445a may be a strainer foot valve, and the second valve 445b may be implemented as a siphon check valve.

The pH measuring sensor 447 is installed at a lower side of the expansion tank 410 and measures the pH concentration of the expansion water introduced into the expansion tank 410. Here, when the pH concentration measured by the pH measurement sensor 447 is detected to be low below the reference value, the facility protection agent injection pump 443 operates to allow the facility protection agent stored in the facility protection agent storage tank 441 to be injected. do.

16 is a diagram schematically showing a cooling and heating system to which an expanded gas separator according to an embodiment is applied, and FIGS. 17A to 17J are an automatic control panel for controlling the pressure of the cooling and heating pipe through the expanded gas separator of the cooling and heating system in FIG. This is an example of a screen displayed on the touch screen of.

In FIG. 16, the cooling/heating system supplies and recovers the heating medium, that is, the cooling/heating water produced in the heat source facility, to the cooling/heating household through a circulation piping system. Here, water, which is mainly used as a heat medium, is heated with medium-temperature water of about 115°C, due to the characteristics of district heating and cooling, and is circulated through a pipe. At this time, the medium hot water (115°C) supplied from the district heating side is heat-exchanged with heating water of about 60°C in a heat source facility such as a boiler or heat exchanger, and then supplied to the heating and cooling household. The heating water supplied to the heating/cooling household is returned to 40~45℃ after the household heating, and then returned to the heat exchanger through a circulation pump and resupplied.

At this time, the expansion water generated at the suction front end of the circulation pump is connected to the expansion gas separator 400 according to an embodiment to repeat suction or recovery of the expansion water, and the pipe pressure is appropriately adjusted.

The number of pipes expanded from the heating return pipe is the expansion water inlet pipe 511 that is introduced into the expansion gas separator 400, the expansion water discharge pipe 513 that reduces the pipe water back to the heating return pipe, and cooling/heating water due to leakage. It consists of a supply water inlet pipe 515 that is supplied through tap water or groundwater in case of shortage.

In an embodiment, when the heating and cooling system is started, the automatic control panel 420 may display the current state on the touch screen 421 as shown in FIG. 17A. 17A, date and time information is displayed on the screen of the touch screen 421, the set pressure and the current pressure are displayed, and the tank water level and the pH concentration of the expanded water are displayed, allowing the administrator to determine the current pressure, water level, and pH concentration. Make it possible to monitor.

On the other hand, when the heating of the cooling and heating system is started, the temperature of the heating water increases as the heat exchanger operates, and accordingly, the heating water expands and the expansion water is introduced into the inlet pipe 511. At this time, the magnetic water treatment device 550 installed in the expanded water inlet pipe 511 treats the expanded and introduced cooling and heating water using magnetic force and then discharges it to the centrifugal water treatment filter 560 installed at the rear end. The centrifugal water treatment filter 560 uses centrifugal force and gravity to remove foreign substances contained in the cooling/heating water introduced through magnetic water treatment. At this time, the pressure sensor 530 measures the pressure of the heating/cooling pipe in real time and provides it to the automatic control panel 420. The automatic control panel 420 displays the piping pressure measured in real time by the pressure sensor 530 on the touch screen 521 screen as shown in FIG. 12B to monitor the case where the piping pressure is higher than the set pressure. The automatic control panel 420 opens the automatic pressure expansion water control valve 425 when a pressure higher than the set pressure is sensed by the pressure sensor 530 to introduce water treatment and expansion water from which foreign substances have been removed into the expansion tank 410. Allows the piping pressure to be regulated. Accordingly, as shown in FIG. 12C, it is displayed on the screen of the touch screen 521 that the pipe pressure has been adjusted to the set pressure of 5.0 kg/cm 2.

Here, when the high-pressure expansion water is introduced into the atmospheric expansion tank 410, the dissolved gas is degassed according to Henry's law and is collected above the expansion tank 410. The air that is degassed and collected in the upper expansion tank 410 is discharged through the automatic air discharge valve 411.

In addition, the vacuum pressure inside the expansion tank 410 is checked through the vacuum sensor 413 and provided to the automatic control panel 420. The automatic control panel 420 forcibly increases the pressure inside the expansion tank 410 by operating the vacuum pump 541 until the vacuum pressure inside the expansion tank 410 checked by the vacuum sensor 413 becomes the set vacuum pressure. It is made lower to remove more dissolved gas. The automatic control panel 420 releases the vacuum pressure by introducing external air into the expansion tank 410 through the vacuum crushing valve 415 during over-vacuum, thereby maintaining safety.

Meanwhile, as shown in FIG. 12E, when the pressure of the heating and cooling pipe is lowered from 5.0kg/cm2, which is the set pressure, to 4.0kg/cm2, the expansion water discharge pump 543 is operated to discharge the expansion water to adjust the cooling and heating pipe pressure. As shown in FIG. 12F, when the pressure of the heating/cooling pipe reaches the set pressure, the expansion water discharge pump 543 is stopped. As shown in FIG. 12G, when abnormal high pressure in the heating/cooling pipe is detected by the pressure sensor 530, the automatic pressure expansion water control valve 525 is opened to introduce the expansion water to adjust the pressure. At this time, the water level rises as the expansion water is drawn in the expansion tank 410. As shown in Fig. 12G, when the water level rises by 80% or more due to excessive expansion water intake, the automatic control panel 420 sounds a full water level alarm and opens the automatic drain valve 418 below the expansion tank 410 to discharge the expansion water. Accordingly, the automatic drain valve 418 is closed after adjusting the water level so that the tank level can be maintained below 80%.

On the contrary, as shown in FIG. 12H, when the water level inside the expansion tank 410 is 18% or less after the expansion water is reduced to the cooling and heating pipe through the expansion water discharge pipe 513 and the expansion water discharge pump 543, the automatic control panel 420 is At the same time as the low water level alarm sounds, the automatic supply water control valve 527 is opened, and supply water is introduced into the expansion tank 410 until the water level reaches 18% or more through the supply water inlet pipe 515. As shown in Fig. 12i, when the tank water level is 18% or more, the automatic replenishing water control valve 527 is closed. Here, as the supply water, tap water or groundwater is used. At this time, the pH concentration of the expanded water decreases due to the filling water. Accordingly, the pH concentration of the expanded water is measured in real time through the pH measuring sensor 447, and when the measured pH concentration of the expanded water is less than a reference value, for example, pH 8-10, the facility protection agent input device 440 The facility protection agent injection pump 443 is operated to suck the heating water facility protection agent stored in the facility protection agent storage tank 441 and put it into the expansion tank 410. Here, a strainer foot valve 445a is installed at the suction-side pipe inlet of the facility protection agent injection pump 443 to block foreign substances inside the facility protection agent from being sucked. In addition, a siphon prevention check valve 445b is installed on the supply side of the facility protection agent injection pump 443 to prevent the siphon phenomenon and reverse flow to the pump. When the pH concentration of the expanded water measured in real time by the pH measuring sensor 447 rises above the reference value due to the input of the facility protection agent, the facility protection agent injection pump 443 is stopped to stop the facility protection agent input. As shown in FIG. 12J, it is displayed on the touch screen 421 that the current pH concentration is maintained as the reference value.

The facility protection agent injection device according to an embodiment and the cooling and heating system equipped with the same measure the pH concentration at all times to inject the heating water facility protection agent, remove dissolved gas according to Henry's Law, and forced degassing through a vacuum pump, magnetic water treatment and centrifugation. Corrosion can be prevented and the burden on maintenance costs can be greatly reduced by constantly managing the water quality of heating and cooling water by removing foreign substances through separation.

Although the above has been described with reference to the preferred embodiments of the present application, those skilled in the art will variously modify the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. And it will be appreciated that it can be changed.

100: sealed expansion tank
110: tank body 120: automatic control panel
130: air compressor 140: equipment protection agent input device
141: facility protection agent storage tank 143: facility protection agent input pump
145: a plurality of valves 145a: first valve (strainer foot valve)
145b: second valve (siphon check valve) 147: pH measuring sensor
150: fastening member
200: expansion brackish water separator
210,410: expansion tank 211: diaphragm tube
213,411: automatic air exhaust valve 215: ventilation pipe
217,417: automatic drain valve 219,412: level sensor
220,420: automatic control panel 221,421: touch screen
230,430: system box 240,440: facility protection agent input device
310,510: a plurality of pipes 320,520: a plurality of valves
330,530: pressure sensor 340: expansion water discharge pump
400: expanding gas separator
413: vacuum sensor 414: vacuum gauge
415: vacuum crushing valve 416: inspection port
540: a plurality of pumps 541: vacuum pump
550: magnetic water treatment device 560: centrifugal water treatment filter

Claims (10)

Equipment protection agent storage tank;
A facility protection agent injection pump fixedly coupled to the top of the facility protection agent storage tank and sucks the facility protection agent stored in the facility protection agent storage tank so as to maintain a reference value at the pH concentration of the expansion water and puts it into the expansion tank of the cooling and heating system; And
It is installed at the inlet of the facility protection agent input pump and is introduced into the facility protection agent storage tank to block the suction of foreign substances when the facility protection agent stored in the facility protection agent storage tank is inhaled, and is installed at the outlet to the facility protection agent injection pump. A plurality of valves having a second valve to prevent reverse flow of; And
Equipment protective agent injection device comprising a pH measuring sensor installed at a lower side of the expansion tank to measure the pH concentration of the expansion water introduced into the expansion tank and to operate the facility protection agent injection pump according to the measured pH concentration.
The method of claim 1, wherein the first valve
Is a strainer foot valve,
The second valve is
Facility protection agent injection device, characterized in that the siphon prevention check valve.
An expansion tank that installs a diaphragm tube made of an elastic material therein and divides the interior into an air chamber and a water chamber by the diaphragm tube to block contact and mixing of external air of the expanded water accommodated in the water chamber;
A facility protection agent input device that is fixed to the outside of the expansion tank, and measures the pH concentration of the expansion water introduced into the expansion tank in real time to inject a facility protection agent into the expansion tank so that the pH concentration of the expansion water is maintained at a reference value; And
Including an automatic control panel that controls the facility protection agent injection device according to the measured pH concentration of the expanded water to perform automatic injection of the facility protection agent and provides a user intuitively knowing the cooling and heating operation state,
The expansion tank is
A hose connected to the expansion water inlet/discharge pipe and installed inside the diaphragm tube to allow the expansion water to be introduced or discharged into the diaphragm tube, and to allow the expansion water to be discharged even when the water level inside the diaphragm tube is lowered below a certain level ;
An air compressor attached to the outside and injecting air into the air chamber through an air pipe;
A residual pressure removal valve installed between the air compressor and the air pipe to remove residual pressure due to compressed air remaining in the air pipe after starting and stopping the air compressor;
An air discharge valve forcibly discharging the air in the air chamber to lower the pressure in the air chamber; And
It includes a drain valve for manually discharging the condensed water of the air compressor,
The facility protection agent injection device
Equipment protection agent storage tank;
A facility protectant injection pump fixedly installed on the upper part of the facility protectant storage tank and inputting the facility protectant stored in the facility protectant storage tank into the expansion tank to adjust the pH concentration of the expansion water;
A first valve comprising a strainer foot valve connected to the facility protection agent injection pump and configured to prevent inhalation of foreign substances when inhaling the facility protection agent stored in the facility protection agent storage tank;
A second valve comprising a siphon check valve connected to the facility protection agent injection pump and preventing reverse flow of the facility protection agent discharged; And
A cooling/heating system comprising a pH measuring sensor installed below the expansion tank and measuring the pH concentration of the expansion water introduced into the expansion tank in real time.
The method of claim 3,
A ventilation pipe and an automatic air discharge valve are respectively installed on the upper part of the expansion tank, and the inside of the expansion tank is maintained at atmospheric pressure by the ventilation pipe, so that when high-pressure expansion water is introduced into the diaphragm tube, the separated gas component is separated by brackish water. A cooling and heating system having a facility protection agent injection device, characterized in that it comprises an expansion water separator for discharging to the outside.
The method of claim 3,
A vacuum pump is connected to the top of the expansion tank through a vacuum pipe, and an automatic air discharge valve is installed on the other side to forcibly lower the pressure in the space inside the expansion tank that is not filled with makeup water by the vacuum pump to generate a pressure difference. A cooling and heating system comprising an expansion gas separator for separating gas components from make-up water and discharging the separated gas components to the outside.
The method of claim 5, wherein the inflation gas separator
A vacuum sensor, a vacuum gauge, and a vacuum crushing valve are installed in the vacuum pipe, respectively, and when the pressure in the space inside the expansion tank is reduced to a reference pressure, some external air is introduced to break the vacuum. A cooling and heating system equipped with a facility protection agent input device.
The method of claim 3,
A cooling and heating system having a facility protection agent input device, comprising a magnetic water treatment device that treats the expanded water introduced through the expanded water inlet pipe through magnetic force.
The method of claim 7,
A cooling and heating system comprising a centrifugal water treatment filter installed at a rear end of the magnetic water treatment device and separating and removing foreign substances contained in the self-water treated expanded water through centrifugal force and gravity.
delete The method of claim 3,
A system box installed at the bottom of the automatic control panel to accommodate a plurality of pipes, valves, and pumps, and in which the expansion water inlet pipe connected to the cooling and heating pipe and the supply water inlet pipe connected to the discharge pipe and the supply water pipe are installed at the top. Cooling and heating system having a facility protection agent input device comprising a.

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