KR102452795B1 - Instantaneous Hot Water Heating Device for Eco-friendly Steam - Google Patents

Abstract

The present invention relates to an eco-friendly instantaneous water heater for steam, which can effectively prevent fatigue of pipes by adjusting an operating pressure at which a fluid flows into the interior of an expansion tank without adjusting a pressure of a gas filling the expansion tank. To this end, the eco-friendly instantaneous water heater for steam according to the present invention comprises: a base frame; a heat exchanger; a steam supply pipe; a steam return pipe; a water supply pipe; a water discharge pipe; a closed expansion tank; a circulating pump; and a controller for controlling the operation of the circulating pump. At respective ends of the steam supply pipe, steam return pipe, water supply pipe, and water discharge pipe, first, second, third, and fourth control valves are installed to allow automatic control of the supply of steam and water through the controller. In the closed expansion tank, multiple pressure regulating members are installed to enable adjustment of a critical pressure value at which a fluid flows into the tank.

Description

Instantaneous Hot Water Heating Device for Eco-friendly Steam

The present invention relates to an instantaneous hot water heating device for eco-friendly steam, and more particularly, to an instantaneous hot water heating device for eco-friendly steam that generates and provides hot water in a short time using high-temperature steam.

In general, a hot water supply system for supplying heating and hot water supply is installed and operated in apartment houses such as high-rise buildings or apartments.

As an example of such a hot water supply system, an instantaneous hot water heating device that heats and supplies water in a short time using high-temperature steam is known. Ho's hot water system (hereinafter referred to as 'patent literature') is disclosed.

The hot water system disclosed in the above patent document includes a heat exchanger for heating water by transferring steam heat to the incoming water; a first steam pipe having one end connected to the steam supply device and the other end connected to the heat exchanger to supply steam to the heat exchanger and to a steam valve for controlling a supply amount of steam; a second steam pipe having one end connected to the condensate treatment apparatus and the other end connected to the heat exchanger so that condensed water generated as steam passes through the heat exchanger flows out to the condensate treatment apparatus; a cold water inlet pipe having one end connected to the cold water supply device and the other end connected to the heat exchanger so that cold water flows into the heat exchanger; a hot water outlet pipe having one end connected to the hot water use device and the other end connected to the heat exchanger so that the hot water generated by passing the cold water through the heat exchanger is supplied to the hot water using device; a circulation pipe connected to one end of the hot water outlet pipe and one end of the cold water inlet pipe, respectively; a sealed pressure expansion tank connected to the circulation pipe to lower the water pressure passing through the circulation pipe by expanding in a sealed state when the water pressure passing through the circulation pipe is greater than or equal to a preset pressure; a temperature sensing circulation pipe connecting a vicinity of one end of the hot water outlet pipe and a vicinity of the other end of the cold water inlet pipe, and equipped with a circulation pump to maintain a constant flow of hot water; an overheat prevention circulation pipe connecting one end of the cold water inlet pipe and the other end of the hot water outlet pipe and having an opening/closing device; a control unit for controlling opening and closing of the steam valve according to the water temperature, wherein the control unit operates the opening and closing device of the overheat prevention circulation pipe when the water temperature exceeds a preset temperature as a result of detection of a temperature sensor mounted on the hot water outlet pipe and control to increase the supply of cold water.

The conventional sealed expansion tank as described above regulates the internal pressure of the expansion tank through the gas injected therein. Through this, when the pressure inside the pipe is higher than the set pressure, the high-temperature fluid (hot water) flows into the expansion tank to prevent overpressure. After absorption, the fluid introduced into the expansion tank due to the pressure of the gas is returned to the inside of the pipe. There is an error in the operating pressure flowing into the interior, and for this reason, it is difficult to reliably absorb the impact of the pipe. there is a problem to be

Therefore, it is required to develop an instantaneous hot water heating device that can reliably prevent fatigue of piping by regulating the operating pressure at which fluid flows into the expansion tank without regulating the pressure of the gas filled into the expansion tank.

KR 10-1206945 B1 (2012. 11. 26.) KR 20-0370859 Y1 (2004. 12. 09.) KR 10-1476557 B1 (2014. 12. 18.) KR 10-1971179 B1 (2010. 07. 13.) KR 10-2011-0108017 A (2011. 10. 05.)

The present invention has been devised to solve the problems of the conventional instantaneous hot water heating device as described above, and the problem to be solved by the present invention is that the fluid flows into the expansion tank without regulating the pressure of the gas filled in the expansion tank. It is to provide an eco-friendly instantaneous hot water heating device for steam that can reliably prevent pipe fatigue by regulating the operating pressure flowing into the interior.

Instantaneous hot water heating device for eco-friendly steam according to the present invention for solving the above problems, a base frame having a predetermined size; a heat exchanger installed on the base frame; a steam supply pipe having one end connected to the heat exchanger to supply steam to the inside; a steam return pipe having one end connected to the heat exchanger to discharge internal steam to the outside; a water supply pipe having one end connected to the heat exchanger to supply water to the inside; a water discharge pipe having one end connected to the heat exchanger for discharging heat-exchanged hot water to the outside; a sealed expansion tank installed on the water discharge pipe to absorb the expansion pressure inside the pipe; a circulation pump installed on a pipe connecting the water supply pipe and the water discharge pipe to circulate water along the heat exchanger, the water supply pipe, and the water discharge pipe; and a controller for controlling the operation of the circulation pump, wherein first, second, third, and fourth control valves are installed at the other ends of the steam supply pipe, the steam return pipe, the water supply pipe, and the water discharge pipe, The water supply amount is automatically controlled, and a plurality of pressure adjusting members are installed in the sealed expansion tank to adjust the critical pressure value through which the fluid flows therein.

And the present invention is a tank body in which the upper surface of the sealed expansion tank is opened and a receiving space of a predetermined size is formed therein; a cover of a predetermined size to cover the open upper surface of the tank body; a first diaphragm having a predetermined size installed between the tank body and the cover and elastically deformed to accommodate the fluid flowing through the cover; a second diaphragm installed between the tank body and the first diaphragm and filled with a gas of a predetermined pressure therein to support a bottom surface of the first diaphragm; and a connecting body having one end connected to communicate with the cover and the other end connected to a pipe through which a fluid flows so that a fluid of a predetermined pressure or more flows toward the first diaphragm, wherein the pressure adjusting member is inside the tank body It is further characterized in that it is configured to adjust the pressure supporting the bottom surface of the first diaphragm by pressing the side surface of the second diaphragm while being installed in the diaphragm.

In addition, another feature of the present invention is that the first diaphragm is made of a rubber material and is formed in a disk shape having a predetermined diameter.

In addition, according to the present invention, the steam return pipe includes first and second return pipes having a predetermined length, and a fifth control valve for opening and closing a flow path is installed between the first and second return pipes, and the water supply pipe has , a preheating tube having a predetermined diameter to surround and spaced apart from the outer surface by a predetermined distance is further provided, and the first and second recovery tubes and the preheating tube are connected to flow paths through first and second connecting tubes having predetermined lengths; A sixth control valve for opening and closing the flow path is installed in the first connection pipe, and the steam recovered through the steam recovery pipe by the opening and closing operations of the fifth and sixth control valves passes through the preheating pipe to the water supply pipe Another feature is that it is configured to selectively preheat the water supplied through the.

In the present invention, a temperature sensor for detecting the temperature of the steam recovered in the first recovery pipe is installed, and the opening and closing operations of the fifth and sixth control valves are automatically controlled according to the temperature of the steam detected by the temperature sensor. Another feature is that it is configured to be so.

According to the present invention, in the instantaneous hot water heating device, steam recovered through the heat exchanger is selectively supplied toward the preheating tube to preheat the water supplied to the heat exchanger through the water supply tube, thereby improving heat exchange efficiency using steam. has the advantage of being

In addition, by appropriately adjusting the critical pressure value of the sealed expansion tank using a pressure adjusting member, there is an advantage in that the pipe can be further prevented from being damaged (ruptured) due to the expansion pressure.

1 is a perspective view showing an example of an instantaneous hot water heating device for eco-friendly steam according to the present invention.
2 is a front view showing an example of an instantaneous hot water heating device for eco-friendly steam according to the present invention.
3 is a plan view showing an example of an instantaneous hot water heating device for eco-friendly steam according to the present invention.
4 is a side view showing an example of an instantaneous hot water heating device for eco-friendly steam according to the present invention.
5 is a perspective view showing an example of a sealed expansion tank according to the present invention.
6 is a cross-sectional view showing an example of a sealed expansion tank according to the present invention.
7 is a bottom perspective view showing an example of the first diaphragm according to the present invention.
8 is a view showing an example in which the sealed expansion tank according to the present invention is operated.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides an eco-friendly instantaneous hot water heating device for steam that can reliably prevent fatigue of a pipe by regulating the operating pressure at which fluid flows into the expansion tank without regulating the pressure of the gas filled into the expansion tank. 1 and 2, the present invention provides a base frame 10, a heat exchanger 20, a steam supply pipe 30, a steam return pipe 40, a water supply pipe 50, and water It includes a discharge pipe 60 , a sealed expansion tank 70 , a circulation pump 80 , and a controller 90 .

The base frame 10 has a configuration in which a heat exchanger 20 and a controller 90 to be described later are installed.

The base frame 10 includes a floor frame 11 having a predetermined size as shown in FIGS. 1 and 2 , and a plurality of installation frames 12 protruding a predetermined length from the upper surface of the floor frame 11 . do.

In addition, the heat exchanger 20 and the controller 90 may be installed in the installation frame 12 .

The heat exchanger 20 has a cross flow path formed therein to exchange two fluids with each other, and as shown in FIGS. 1 and 2 , the heat exchanger 20 is assembled by overlapping a plurality of thin metal plates with narrow intervals. It may be configured as a single plate heat exchanger.

In the heat exchanger 20 as described above, there are four connecting pipes (no reference numerals) each connected to one end of the steam supply pipe 30 , the steam recovery pipe 40 , the water supply pipe 50 , and the water recovery pipe 60 , which will be described later. is provided, and heat exchange is achieved while steam and water flow along different flow paths through the connection pipe.

The heat exchanger 20 as described above is selected from among the heat exchangers 20 of various structures known to those skilled in the art for easy implementation, and therefore a detailed description of the configuration of the heat exchanger 20 will be omitted.

The steam supply pipe 30 is connected to a steam boiler (not shown) to receive steam, and the steam supply pipe 30 has one end connected to one side connection pipe of the heat exchanger 20, and the other end of the steam boiler. connected to one side of the pipe.

A first control valve (V1) is installed at the other end of the steam supply pipe (30), and the flow rate of steam supplied through the first control valve (V1) is adjusted.

The steam return pipe 40 is connected to the steam boiler so that the steam that has passed through the heat exchanger 20 is re-supplied toward the steam boiler, and one end of the steam return pipe 40 is connected to one side of the heat exchanger 20 . and the other end is connected to one side pipe of the steam boiler.

A second control valve V1 is installed at the other end of the steam return pipe 40, and the flow rate of steam recovered toward the steam boiler through the second control valve V2 is adjusted.

On the other hand, the steam return pipe 40 according to the present invention may be configured to selectively preheat water as needed by using residual heat of the steam that has passed through the heat exchanger 20 , and for this purpose, the steam return pipe 40 is As shown in FIGS. 1 to 3 , it may be composed of first and second recovery tubes 41 and 42 having a predetermined length.

And a fifth control valve V5 for opening and closing the flow paths of the first and second recovery pipes 41 and 42 is installed between the first and second recovery pipes 41 and 42, and the water supply pipe 50 to be described later A preheating tube 43 of a predetermined diameter is provided to surround the side surface at a predetermined interval, and the first and second return tubes 41 and 42 and the first and second connecting tubes 44 having a predetermined length. , 45 , a flow path may be connected, and a sixth control valve V6 for opening and closing the flow path may be installed in the first connection pipe 44 .

Through the above configuration, the opening and closing operations of the fifth and sixth control valves V5 and V6 are controlled by the controller 90 to be described later, and the steam recovered through the steam return pipe 40 passes through the preheating pipe 43 . Thus, it can be controlled to selectively preheat the water supplied through the water supply pipe 50 .

At this time, the controller 90 includes a temperature sensor (not shown) that detects the steam temperature inside the first return tube 41 to control the operations of the fifth and sixth control valves V5 and V6. When the steam temperature inside the first return pipe 41 installed in 41 and sensed in real time through this temperature sensor is higher than the temperature set by the user, the fifth and sixth control valves V5 and V6 The steam recovered by controlling the operation is controlled to be recovered toward the steam boiler via the preheating tube 43 .

One end of the water supply pipe 50 is connected to a connection pipe on one side of the heat exchanger 20 and the other end is connected to a hot water pipe for heating or hot water supply recovered from the user side, and the hot water or water tank for heating or hot water supply recovered from the user side through this. It is configured to supply the water supplied from the heat exchanger (20).

A third control valve V3 is installed at the other end of the water supply pipe 50 , and the opening degree of the flow path is adjusted by the control of the controller 90 , which will be described later, so that the flow rate and flow rate of the supplied water are adjusted.

The water discharge pipe 60 has one end connected to one side connection pipe of the heat exchanger 20 and the other end connected to a user-side hot water pipe for heating or hot water supply to supply hot water discharged through the heat exchanger 20 .

A fourth control valve V4 is installed at the other end of the water discharge pipe 60, and the opening degree of the flow path is adjusted by the control of the controller 90, which will be described later, so that the flow rate and flow rate of the hot water supplied to the user are adjusted. do.

In addition, the water discharge pipe 60 is further provided with a circulation pipe 61 communicating with the water supply pipe 50 as shown in FIG. 4 , and a circulation pump 80 to be described later is installed in the circulation pipe 61 , Depending on the temperature of the hot water discharged from the heat exchanger 20 , it may be re-supplied toward the water supply pipe 50 through the water discharge pipe 60 , and may be controlled to repeat heat exchange a predetermined number of times through the heat exchanger 20 .

The sealed expansion tank 70 is installed on the water discharge pipe 60 to absorb the expansion pressure inside the pipe.

As shown in FIGS. 5 and 6, the sealed expansion tank 70 includes a tank body 71, a cover 72, a first diaphragm 73, a second diaphragm 74, a connection body 75, and a pressure. Including the adjusting member 76, the configuration of the sealed expansion tank 70 will be described in detail below.

The tank body 71 has a configuration in which the first and second diaphragms 73 and 74 and the pressure adjusting member 76, which will be described later, are accommodated therein.

As shown in FIGS. 5 and 6, the upper surface of the tank body 71 is opened to form an accommodating space of a predetermined size therein, and the upper periphery protrudes to the outside by a predetermined width to be in close contact with the cover 72 to be described later. A flange (without reference numeral) for assembly is formed.

And a hole (no reference numeral) of a predetermined size is formed in the bottom surface of the tank body 71, and the gas inlet (no reference numeral) of the second diaphragm 74, which will be described later, through the hole is provided outside the tank body 71. will be exposed as

In addition, a plurality of supports (no reference numerals) are installed on the side surfaces of the tank body 71 at a predetermined interval, and a through hole of a predetermined diameter passing through the support and the side surfaces of the tank body 71 (no reference numerals). is formed, and the guide shaft 76B of the pressure adjusting member 76 to be described later through the support and the through hole is installed so as to penetrate the inner and outer sides of the tank body 71 .

The cover 72 covers the open upper surface of the tank body 71 and is connected to a connection body 75 to be described later so that a flow path is formed so that the fluid inside the pipe flows into the inside of the tank body 71 .

The cover 72 is formed in the shape of a disk having a predetermined diameter as shown in FIGS. 5 and 6, and a connecting pipe body 72A of a predetermined diameter is protruded to have a predetermined length in the middle portion.

At this time, a screw thread is formed on the inner surface or the outer surface of the connection pipe body (72A), and through this, the connection body 75 and the screw assembly to be described later are configured to be detachably coupled.

In addition, a plurality of fastening holes (no reference numerals) of a predetermined diameter are radially formed around the cover 72, and the bolt B is inserted through these fastening holes to penetrate the flange of the tank body 71. , the nut (N) is assembled so that the tank body 71 and the cover 72 are strongly and tightly assembled with each other.

The first diaphragm 73 is elastically deformed by the fluid of a predetermined pressure flowing in through the connecting body 72A of the connecting body 75 and the cover 72 to be described later, and accommodated in the tank body 71 or the tank body. (71) is a configuration to return to the outside.

As shown in FIGS. 6 and 7, the first diaphragm 73 is formed in the shape of a disk having a predetermined diameter corresponding to the diameter of the cover 72, and is made of a rubber material having elastic force, so that it can be easily elasticated by the pressure of the fluid. configured to be deformed.

At this time, the first diaphragm 73 is elastically deformed by the pressure of the fluid, and then it is reliably restored to its original shape by the elastic restoring force, and there is no need to reliably return the fluid flowing into the tank body 71 toward the pipe. To this end, an elastic support 73A serving as an elastic spring made of a metal material may be installed on the bottom surface of the first diaphragm 73 .

Here, the elastic support 73A may be formed to have a spiral shape and may be integrally formed by insert-injecting the bottom surface of the first diaphragm 73 .

When the pressure of the fluid flowing toward the tank body 71 through the connection pipe body 72A through the above configuration exceeds the critical pressure value, the first diaphragm 73 is closed due to the pressure of the fluid to be described later in the tank body ( 71) is elastically deformed to accommodate the fluid, and when the pressure of the fluid is reduced below the critical pressure value, the first diaphragm is caused by the elastic restoring force of the first diaphragm 73 and the elastic restoring force of the elastic support 73A. The shape of the 73 is restored to the disk shape, whereby the first diaphragm 73 naturally comes into close contact with the inner surface of the cover 72 so that the fluid between the cover 72 and the first diaphragm 73 is connected to the pipe body. Through (72A), the water is reliably returned to the pipe.

The second diaphragm 74 is installed between the tank body 71 and the first diaphragm 73 to support the bottom surface of the first diaphragm 73 through a gas of a predetermined pressure.

As shown in FIG. 6, the second diaphragm 74 is made of a rubber material, and a receiving space of a predetermined size with an open upper surface is formed in the middle part, and protrudes outward by a predetermined width along the upper periphery to the flange ( No reference numerals) are formed integrally.

At this time, the flange portion of the second diaphragm 74 is in close contact with the flange of the tank body 71 and is fixed in position with a bolt (B) and a nut (N), whereby the first and second diaphragms 73 and 74 through the gas inlet ), airtightness is maintained so that the gas injected into the space does not leak to the outside.

The connection body 75 is configured to be assembled on a pipe while being connected to communicate with the cover 72 .

As shown in FIG. 6, the connecting body 75 has flanges (no reference numbers) to which pipes are assembled at both ends of a tubular body (no reference numeral) having a predetermined diameter, and one side of this body has a predetermined diameter. A connector body 75A having a protrusion is formed.

To this end, a screw thread is formed along the inner surface or the outer surface of the connecting tube body 75A of the body, whereby the connecting tube body 72A of the cover 72 and the connecting tube body 75A of the connecting body 75 are separated and combined. will become

The connecting body 75 is manufactured to have various diameters to fit pipes having various diameters, and the connecting body 75 having a diameter corresponding to the diameter of the pipe to be assembled thereafter is selectively assembled and used.

The pressure regulating member 76 is installed inside the tank body 71 to press the outer surface of the second diaphragm 74, and through this, the critical pressure at which the first diaphragm 73 is elastically deformed by the pressure of the fluid. It is a controllable configuration.

As shown in FIG. 6, the pressure regulating member 76 includes a pressure plate 76A formed in an arc shape having a predetermined diameter while positioned outside the second diaphragm 74, and one end of the pressure plate 76A. A guide shaft 76B connected to the side surface and installed so that the other end protrudes a predetermined length to the outside of the tank body 71 through a through hole and a support provided on the side of the tank body 71 in turn, and the tank body 71 An adjustment screw 76C assembled to the guide shaft 76B protruding outward and an elastic spring 76D of a predetermined length installed on the guide shaft 76B between the pressure plate 76A and the inner surface of the tank body 71 includes

Through the configuration as described above, the user can adjust the distance at which the pressure plate 76A is in close contact with the side surface of the second diaphragm 74 by adjusting the adjusting screw 76C, and through this, the first and second diaphragms 73 and 74 can be adjusted. Even in a state where the amount of gas filled therebetween is the same, the critical pressure value at which the first diaphragm 73 is elastically deformed can be appropriately adjusted.

In the sealed expansion tank 70 of the present invention, a temporary flow path having a closed loop connected to a pump is connected to the flange of the connection body 75 before being assembled on the water discharge pipe 60, and a predetermined pressure is applied on the flow path. The first diaphragm 73 is installed on the water discharge pipe 60 after adjusting the critical pressure value at which the first diaphragm 73 is elastically deformed by supplying a fluid.

In the above, the pressure regulating member 76 is shown and described only as configured to manually adjust the pressure through the adjusting screw 76C and the elastic spring 76D, but unlike the guide shaft 76B, the pressure plate 76A is A sliding cylinder unit (not shown) is installed, and a pressure sensor (not shown) for detecting the pressure transmitted from the second diaphragm 74 is installed on the pressure plate 76A, which is sensed by the pressure sensor The cylinder unit may be configured to be controlled according to the change in pressure, and through this, the critical pressure value at which the first diaphragm 73 operates in accordance with the proportional increase in the pressure of the water discharge pipe 60 during operation of the instantaneous hot water heater It may be configured to be proportionally adjusted.

In this case, the critical pressure value of the first diaphragm 73 can be fluidly controlled by using the pressure adjusting member 76 according to the real-time fluid temperature and pressure inside the pipe, thereby causing fatigue due to the fluid pressure acting on the pipe. can be prevented more reliably.

The circulation pump 80 is installed in the circulation pipe 61 connecting the water supply pipe 50 and the water discharge pipe 60, and the hot water discharged to the water discharge pipe 60 by the control of the controller 90 to be described later is a heat exchanger. It is configured to circulate so that it is re-supplied toward (20).

The circulation pump 80 is configured by selecting from among various types of pumps known to those skilled in the art, and detailed description thereof will be omitted.

The controller 90 controls the opening amount of the first, second, third, and fourth control valves V1, V2, V3, and V4 to adjust the flow rate and flow rate of the supplied hot water and steam, and to the target temperature set by the user. Accordingly, the operation of the circulation pump 80 is selectively controlled so that the temperature of the hot water for heating or hot water supplied to the user is maintained to circulate the hot water toward the heat exchanger 20 .

In addition, the controller 90 controls the operations of the fifth and sixth control valves V5 and V6 according to the temperature of the steam recovered toward the steam boiler, and uses the residual heat of the steam recovered through this to the heat exchanger 20 toward the side. By preheating the supplied water, the efficiency of using the heat energy of the steam is increased.

As described above, according to the present invention, in the instantaneous hot water heating device, steam recovered through the heat exchanger is selectively supplied toward the preheating tube to preheat the water supplied to the heat exchanger through the water supply pipe, whereby heat exchange efficiency using steam This is improved, and by appropriately adjusting the critical pressure value of the sealed expansion tank using the pressure adjusting member, it is possible to further prevent the pipe from being damaged (ruptured) due to the expansion pressure.

In the above description, for convenience of description, reference numerals and names were given to the drawings showing preferred embodiments and the components shown in the drawings, but this is an embodiment according to the present invention. It should not be construed as being limited, and simple substitution into a configuration having the same function as a change in various predictable shapes from the description of the invention is within the range that can be changed for easy implementation by those skilled in the art. It will be seen as extremely self-explanatory.

10: base frame 11: floor frame
12: installation frame 20: heat exchanger
30: steam supply pipe 40: steam return pipe
41: first recovery tube 42: second recovery tube
43: preheat tube 44: first connector
45: second connector 50: water supply pipe
60: water discharge pipe 61: circulation pipe
70: sealed expansion tank 71: tank body
72: cover 72A: connector body
73: first diaphragm 73A: elastic support
74: second diaphragm 75: connection body
75A: connecting pipe body 76: pressure regulating member
76A: platen 76B: guide shaft
76C: adjusting screw 76D: elastic spring
80: circulation pump 90: controller
B: Bolt N: Nut
V1: first control valve V2: second control valve
V3: third control valve V4: fourth control valve
V5: fifth control valve V6: sixth control valve

Claims (5)

a base frame 10 having a predetermined size;
a heat exchanger 20 installed on the base frame 10;
a steam supply pipe 30 having one end connected to the heat exchanger 20 to supply steam to the inside;
a steam return pipe 40 having one end connected to the heat exchanger 20 to discharge the internal steam to the outside;
a water supply pipe 50 having one end connected to the heat exchanger 20 to supply water to the inside;
a water discharge pipe 60 having one end connected to the heat exchanger 20 to discharge heat-exchanged high-temperature water to the outside;
a sealed expansion tank 70 installed on the water discharge pipe 60 to absorb the expansion pressure inside the pipe;
A circulation pump (80) installed on a pipe connecting the water supply pipe (50) and the water discharge pipe (60) to circulate water along the heat exchanger (20), the water supply pipe (50) and the water discharge pipe (60) ; and
a controller 90 for controlling the operation of the circulation pump 80;
including,
The first, second, third, and fourth control valves (V1, V2, V3, V4) are installed at the other ends of the steam supply pipe 30, the steam return pipe 40, the water supply pipe 50 and the water discharge pipe 60. The amount of steam and water supply is automatically controlled through the controller 90,
In the sealed expansion tank (70),
A plurality of pressure regulating members 76 are installed to enable adjustment of the critical pressure value through which the fluid flows into the interior,
The sealed expansion tank 70,
a tank body 71 having an open upper surface and having a receiving space of a predetermined size therein;
a cover 72 of a predetermined size for covering the open upper surface of the tank body 71;
a first diaphragm 73 having a predetermined size that is installed between the tank body 71 and the cover 72 and elastically deformed to accommodate the fluid flowing through the cover 72;
a second diaphragm (74) installed between the tank body (71) and the first diaphragm (73) and filled with a gas of a predetermined pressure therein to support a bottom surface of the first diaphragm (73); and
a connecting body 75 having one end connected to be in communication with the cover 72 and the other end connected to a pipe through which a fluid flows so that a fluid greater than a set pressure flows toward the first diaphragm 73;
including,
The pressure regulating member 76,
Instantaneous hot water for eco-friendly steam, characterized in that it is installed inside the tank body (71) and is configured to adjust the pressure supporting the bottom surface of the first diaphragm (73) by pressing the side surface of the second diaphragm (74) heating device.
delete The method according to claim 1,
The first diaphragm 73 is
Instantaneous hot water heating device for eco-friendly steam, characterized in that it is made of a rubber material and is formed in the shape of a disk having a predetermined diameter.
The method according to claim 1,
The steam return pipe 40,
Consists of first and second recovery pipes 41 and 42 having a predetermined length,
Between the first and second recovery pipes (41, 42),
A fifth control valve (V5) for opening and closing the flow path is installed,
In the water supply pipe 50,
A preheating tube 43 of a predetermined diameter is further provided to surround the outer surface and spaced apart by a predetermined distance,
The first and second recovery tubes 41 and 42 and the preheating tube 43 are
The flow path is connected through the first and second connecting pipes 44 and 45 having a predetermined length,
In the first connection pipe 44,
A sixth control valve (V6) for opening and closing the flow path is installed,
The steam recovered through the steam return pipe 40 by the opening and closing operations of the fifth and sixth control valves V5 and V6 is supplied through the water supply pipe 50 via the preheating pipe 43 . Instantaneous hot water heating device for eco-friendly steam, characterized in that it is configured to selectively preheat the.
5. The method according to claim 4,
In the first recovery pipe 41,
A temperature sensor that detects the temperature of the recovered steam is installed,
The instantaneous hot water heating device for eco-friendly steam, characterized in that the opening and closing operations of the fifth and sixth control valves (V5, V6) are automatically controlled according to the temperature of the steam detected by the temperature sensor.

Images