CN107076461B

CN107076461B - Boiler with check valve integrated with water pipe

Info

Publication number: CN107076461B
Application number: CN201580059743.9A
Authority: CN
Inventors: 金圣起; 梁铉益
Original assignee: Qingdong Nabian Co Ltd
Current assignee: Qingdong Nabian Co Ltd
Priority date: 2014-11-19
Filing date: 2015-11-16
Publication date: 2020-01-31
Anticipated expiration: 2035-11-16
Also published as: CN107076461A; KR101639188B1; WO2016080715A1; RU2017121072A; KR20160059678A; RU2017121072A3; RU2676172C2; EP3222929A1; EP3222929A4

Abstract

The invention provides kinds of boilers having check valves integrated with water pipe , which are capable of simplifying and miniaturizing the structure of water pipes, and are characterized by comprising a three-way valve for switching the flow path of heating water to supply heating water heated in a main heat exchanger to a heating-required place or selectively supplying heating water to a hot-water supply heat exchanger side, a bypass pipe connecting the three-way valve and a heating-water return pipe connecting the heating-required place and a heating-water return pipe of the main heat exchanger, check valves provided in the pipes of the bypass pipe and allowing the flow of fluid only in directions from the three-way valve to the heating-water return pipe when the heating pipe connected to the heating-required place or the heating pipe connected to the hot-water supply heat exchanger side is closed, and check valves and the three-way valve are provided in water pipe blocks in a body type.

Description

Boiler with check valve integrated with water pipe

Technical Field

The present invention relates to kinds of boilers having check valves (check valves) integrated with water pipe , and more particularly, to kinds of boilers having check valves integrated with water pipe , in which a bypass (bypass) structure of heating water capable of preventing the water pressure inside a heating pipe from rising above a predetermined level is formed integrated with water pipe modules , thereby simplifying and reducing the water pipe structure.

Background

Generally, a boiler (boiler) is a device as follows: the heating water is heated by combustion heat of a burner (burner), and the heated heating water is supplied to a heating demand for heating, and hot water is supplied by heat exchange between the heated heating water and tap water.

A conventional boiler of type includes a main heat exchanger for heating water by combustion heat of a burner, a circulation pump provided in a flow path of the heating water for forcibly circulating the heating water, a three-way valve for switching the flow path of the heating water so as to supply the heating water heated by the main heat exchanger to a heating-required place or selectively supply the heating water to a hot-water supply heat exchanger side, a hot-water supply heat exchanger for supplying hot water by heat exchange between the heating water heated by the main heat exchanger and tap water, and an expansion tank for recovering and storing the heating water returned through the heating-required place and the heating water circulated through the hot-water supply heat exchanger.

As a configuration for preventing the occurrence of overpressure in the heating pipe as described above, Korean laid-open patent No. 1998 and 016052 discloses a configuration in which a bypass is formed at a side of a discharge pipe formed between two upper and lower closed holes in a discharge pipe of a bidirectional circulation pump, and a bypass pipe is connected between the bypass hole and a heating water return pipe.

According to the above-described configuration, although there is an advantage that the occurrence of overpressure in the heating pipe can be prevented, since the bypass pipe connecting the bidirectional circulation pump and the heating water return pipe is configured to be always open through the bypass hole, even in a normal state where the heating pipe is not closed, portions of the heating water heated in the heating mode and the hot water mode leak to the heating water return pipe side through the bypass pipe, and there is a disadvantage that the heat exchange efficiency of the heating water is determined to be lowered, and the manufacturing cost of the boiler is increased as the expensive bidirectional circulation pump is provided.

In addition, the hot water supply heat exchanger may be classified into: a fin-tube heat exchanger configured in a manner that a plurality of tubes are inserted into a tank; the plate heat exchanger is configured by stacking a plurality of plates, and realizes heat exchange by alternately flowing heating water and tap water in each layer inside. Among these, the plate heat exchanger has an advantage that the number of components and the volume can be reduced compared to the fin tube type heat exchanger, and productivity can be improved.

The -like structure of the plate heat exchanger in which the above-described plates are stacked is disclosed in korean patent laid-open publication No. 10-1151754 and korean patent laid-open publication No. 10-2003-0071249.

However, in the conventional plate heat exchanger, since the water pipe through which the heating water flows and the water pipe through which the tap water (hot water) flows are separately provided at positions separated from each other, respectively, the water pipe through which the heating water flows and the water pipe through which the tap water (hot water) flows are complicated in the structure of the water pipe through which the heating water flows and the structure of the water pipe through which the tap water (hot water) flows occupy a large installation space, and it is difficult to miniaturize the boiler, and the water pipe pipes are lengthened, so that a pressure loss occurs, and thus there is a problem in that the heat exchange efficiency is reduced.

Disclosure of Invention

Technical problem

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide types of boilers each having a check valve integrated with a water pipe , in which a bypass structure of heating water capable of preventing a water pressure inside a heating pipe from rising above a predetermined level is formed integrally with a water pipe module , thereby simplifying and reducing a structure of a heating water discharge pipe.

Another object of the present invention is to provide kinds of boilers having check valves integrated with the water tube , in which each function of the boiler water tube is constructed in a module unit, thereby simplifying an assembly structure between water tube members and improving productivity of products.

Still another object of the present invention is to provide kind of boiler having check valve integrated with water tube , which can improve heat exchange performance by minimizing pressure loss by shortening the length of the tube for connecting between water tube parts.

Means for solving the problems

The boiler of the present invention for solving the above-mentioned problems having the check valve integrated with the water pipe , having the main heat exchanger 30 heating the heating water by the combustion heat of the heater and the hot water supply heat exchanger 100 supplying the hot water by the heat exchange between the heating water heated from the main heat exchanger 30 and the tap water, is characterized by comprising a three-way valve 210 for switching the flow path of the heating water to supply the heating water heated at the main heat exchanger 30 to the heating requirement or selectively supplying the heating water to the hot water supply heat exchanger 100 side, a bypass pipe L8 connecting the three-way valve 210 and the heating water return pipe L3, the heating water return pipe L3 connecting the heating requirement and the main heat exchanger 30, and a check valve 220 provided to the pipe of the bypass pipe L8 and provided to the three-way valve 210 in a manner of allowing the three-way valve 210 to flow in the direction of the three-way valve 4835 and the three-way valve 8 in the case that the overpressure occurs due to the closing of the heating water L6 connected to the heating requirement side or the hot water supply heat exchanger 100 side.

The heating pipes L4 and L5 connected to the heating water return pipe L3 may be provided with a circulation pump 20 for pressure-feeding the heating water directions toward the main heat exchanger 30 side.

When the heating pipe L2 connected to the heating demand side or the heating pipe L6 connected to the hot water supply heat exchanger 100 side is closed and overpressure occurs, the heating water heated in the main heat exchanger 30 can be supplied to the three-way valve 210, then flow into the bypass pipe L8 connected to the side of the three-way valve 210, pass through the check valve 220, then flow into the expansion tank 10, and the heating water stored in the expansion tank 10 is circulated to the main heat exchanger 30 by the circulation pump 20, thereby preventing overpressure from occurring in the heating pipe.

The hot water supply heat exchanger (100) is configured such that a plurality of plates are stacked, a heating water flow path (P1) and a tap water flow path (P2) are formed separately from each other, heating water and tap water are alternately flowed through the hot water supply heat exchanger 100 to perform heat exchange, a front panel 110 positioned in front of the plurality of plates may be provided with a heating water discharge guide 110c for forming a flow path of the heating water such that a heating water outlet pipe L7 is positioned in proximity to the heating water inlet pipe L6, the heating water outlet pipe L7 may form a flow path of the heating water such that the heating water flows into a heating water inlet pipe L8 formed on a lower side of the front panel 110 and is discharged through the heating water flow path P1, and a hot water discharge guide 110d for forming hot water such that the heating water outlet pipe L11 is positioned in proximity to a heating water inlet pipe L68627 of the front panel 110 to form a hot water supply water inlet pipe L and return water flow path 100, and a hot water supply module may be assembled to the hot water inlet module 100 through a tap water inlet pipe 465 and a hot water outlet pipe 465, and a hot water inlet pipe 465 may be assembled to the hot water inlet heat exchanger 100 and a hot water outlet pipe 465 and a hot water inlet heat exchanger 100 and a hot water outlet module may be provided separately from a hot water inlet heat exchanger 100 and a hot water outlet pipe 465 and a hot water inlet heat exchanger 100 and a hot water outlet port heat exchanger 100 and a hot water inlet heat exchanger 100 and a hot water outlet pipe 465 and a hot water outlet port may be assembled to a hot water inlet port of a hot water inlet heat exchanger 100 and a hot water outlet port heat exchanger 100 and a hot water inlet heat exchanger 100 and.

A heating water inflow hole 111 connected to the heating water inflow pipe L6 may be formed at a lower portion side of the front panel 110, a heating water discharge hole 112 connected to the heating water outflow pipe L7 may be formed at a side of the heating water inflow hole 111, and the heating water discharge guide 110c may be formed to guide heating water discharged forward toward the other upper portion side of the front panel 110 to the heating water discharge hole 112.

A tap water inlet hole (113) connected to the tap water inlet pipe (L10) is formed on the other side of the lower portion of the front panel (110), a hot water discharge hole (114) connected to the hot water supply pipe (L11) is formed on the upper portion of the front panel (110) at a position close to the tap water inlet hole (113) in a region where the heating water discharge guide (110c) is not formed, and the hot water discharge guide (110d) may be formed to guide the hot water discharged forward toward the upper portion side of the front panel (110) to the hot water discharge hole (114).

A flat panel 120 may be stacked behind the front panel 110, the flat panel 120 may have a heating water inflow hole 121 formed at a lower portion side, a heating water discharge hole 122 formed at an upper portion side, a tap water inflow hole 123 formed at a lower portion side, and a hot water discharge hole 124 formed at an upper portion side, and edge portions of the heating water discharge guide portion 110c and the hot water discharge guide portion 100d may be closely attached to the flat panel 120, and an inner portion of the edge portions may protrude forward to form a discharge flow path of heating water and hot water.

The plurality of th plates 130 and the plurality of second plates 140 formed to cross the boss portions positioned in the diagonal direction in the front-rear direction may be alternately stacked behind the flat panel 120 to alternately form the heating water flow path P1 and the tap water flow path P2, and the plurality of th beads 135 and the plurality of second beads 145 bent in opposite directions may be formed on the th plates 130 and the plurality of second plates 140, and the gap between the overlapping portions of the th beads 135 and the second beads 145 may be configured to allow the fluid to flow.

An th flow path switching plate 150 and a second flow path switching plate 160 may be sequentially stacked behind the second plate 140 stacked at the rearmost, wherein the th flow path switching plate 150 turns the flow path of the tap water from the rear to the front, and the second flow path switching plate 160 turns the flow path of the heating water from the rear to the front.

The -th flow path switching plate 150 may have a heating water inflow hole 151 formed in the lower portion side, a heating unit discharge hole 152 formed in the upper portion side, a front-rear blocked shape formed in the lower portion side and the upper portion side, and a front-rear blocked shape formed in the entire area of the second flow path switching plate 160.

The second water pipe module 300 may be provided with: a flow sensor 310 for sensing the flow of the tap water flowing into the tap water inflow pipe L10; a water supply pipe L12 for supplying heating water by receiving the inflow of tap water when the heating water is insufficient; and a water supply valve 320 provided in a pipe of the water supply pipe L12 and controlling the flow of the tap water.

Technical effects

According to the boiler equipped with the check valve integrated with the water pipe of the present invention, the three-way valve for switching the flow path of the heating water according to the heating mode and the hot water mode, the supply and circulation flow path of the heating water connected thereto, the bypass pipe for preventing the overpressure from occurring inside the heating pipe, and the check valve are equipped in the water pipe module in the body type, so that the structure of the water pipe can be simplified and the installation space can be reduced, and the damage of the components caused when the overpressure occurs can be prevented in advance, thereby improving the durability.

Further, the th water tube module that provides a bypass path for the heating water when overpressure occurs in the flow path of the heating water and the heating pipe in the heating mode or the hot water mode, and the second water tube module that provides a flow path for the tap water and the hot water and a supply path for the heating water in the hot water mode are respectively configured in module units, and these modules are configured to be attachable to and detachable from the hot water supply heat exchanger, whereby the assembly structure between the water tube members can be simplified, the number of components can be reduced, and the productivity of the components can be improved.

Further, the heating water discharge guide and the hot water discharge guide are formed on the front panel of the hot water supply heat exchanger such that the distance between the heating water inlet pipe and the heating water outlet pipe and the distance between the city water inlet pipe and the hot water supply pipe are close to each other, and the th water tube module and the second water tube module are detachably mounted to the hot water supply heat exchanger, thereby enabling the size reduction of the boiler, shortening the connection flow path of the water tubes, reducing the pressure loss due to the pressure drop of the fluid, and improving the heat exchange performance of the boiler.

Drawings

Fig. 1 is a view schematically showing the construction of a boiler having a check valve integrated with a water pipe according to the present invention.

Fig. 2 is a combined perspective view of main parts of a boiler according to the present invention.

Fig. 3 is a perspective view showing fig. 2 separated in a module unit.

Fig. 4 is an exploded perspective view illustrating the heat exchanger shown in fig. 3.

Fig. 5 is a front view of the heat exchanger.

Fig. 6 is a sectional view taken along line a-a of fig. 5.

Fig. 7 is a sectional view taken along line B-B of fig. 5.

FIG. 8 is a plan view of the th water tube module illustrated in FIG. 3.

Fig. 9 is a cross-sectional view taken along line C-C of fig. 8.

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 8

Fig. 11 is a sectional view taken along line E-E of fig. 8.

Fig. 12 is an exploded perspective view of the check valve illustrated in fig. 11.

Fig. 13 is a view illustrating a flow path of heating water in a heating mode in the boiler according to the present invention.

Fig. 14 is a diagram showing flow paths of heating water and tap/hot water in a hot water mode in the boiler according to the present invention.

Fig. 15 is a view showing a flow path of the bypass flow (bypass) of the heating water to prevent the occurrence of the overpressure in the boiler of the present invention in a case where the heating pipe on the heating water supply side or the hot water supply heat exchanger side is closed.

Description of the symbols

10: expansion tank 20: circulating pump

30: main heat exchanger 100: hot water supply heat exchanger

110: front panel

110a, 120a, 130a, 140a, 150a, 160 a: plane part

110b, 120b, 130b, 140b, 150b, 160 b: flange part

110 c: heating water discharge guide 110 d: hot water discharge guide

111. 121, 131, 141, 151: heating water flow inlet hole

131a, 132a, 143a, 144a, 151a, 161 a: boss part

112. 123, 132, 142, 152: heating water discharge hole

113. 123, 133, 143: tap water inflow hole

114. 124, 134, 144: hot water discharge hole

120, flat panel 130, th panel

135. 155, , 145, 165 and a second pressing strip

140: second plate 150: : flow path switching plate

160: second flow path switching plate 200: th water pipe module

201: the housing 210: three-way valve

211: the motor 212: cam part

213 main shaft 214 valve body

215 elastic member 216 valve sheet

216a, 216 b: locking table 220: check valve

221 main body 222 valve body

223: the elastic member 224: fastening part

300: second water tube module 310: flow sensor

320 supplementary water valve L1 main heating water supply pipe

L2: heating water supply pipe L3: heating water return pipe

L4: heating water circulation inflow pipe L5: heating water circulation outflow pipe

L6: heating water inflow pipe L7: heating water outflow pipe

L8: bypass line L9: tap water supply pipe

L10: tap water inflow pipe L11: hot water supply pipe

L12: water supplement pipe P1: heating water flow path

P2: running water flow path

Detailed Description

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the drawings as follows.

Referring to fig. 1 to 3, a boiler according to an embodiment of the present invention includes an expansion tank 10 storing heating water returned through a heating demand place in a heating mode or heating water circulated inside the boiler in a hot water mode, a circulation pump 20 pumping the heating water discharged from the expansion tank 10 in a direction , a main heat exchanger 30 heating the heating water flowing in through the circulation pump 20 by combustion heat of a heater, a hot water supply heat exchanger 100 supplying hot water by heat exchange between the heating water heated by the main heat exchanger 30 and tap water, a th water pipe module 200 providing a flow path through which the heating water supplied from the main heat exchanger 30 is returned through the heating demand place or the hot water supply heat exchanger 100 and a bypass path for preventing overpressure in a heating pipe, and a second water pipe module 300 providing a flow path of tap water and a supplementary flow path of the heating water through the hot water supply heat exchanger 100.

Further, reference numeral "L1" shown in fig. 1 denotes a heating water main supply pipe through which the heating water heated in the main heat exchanger 30 is supplied to the three-way valve 210; "L2" denotes a heating water supply pipe that supplies heating water from the three-way valve 210 to a heating demand in the heating mode; "L3" denotes a heating water return pipe that returns the heating water passing through the heating demand to the expansion tank 10; "L4" denotes a heating water circulation inflow pipe that allows the heating water discharged from the expansion tank 10 to be supplied to the circulation pump 20; "L5" represents a heating water circulation outflow pipe that supplies heating water pressure-fed from the circulation pump 20 to the main heat exchanger 30; "L6" denotes a heating water inflow pipe that causes heating water to be supplied from the three-way valve 210 to the hot water supply heat exchanger 100 in the hot water mode; "L7" is a heating water outflow pipe for causing the heating water to merge from the hot water supply heat exchanger 100 into the heating water return pipe L3; "L8" is a bypass pipe for preventing an overpressure state in the heating pipe by discharging the heating water from the three-way valve 210 to the heating water return pipe L3; "L9" is a tap water supply pipe through which tap water flows; "L10" is a tap water inflow pipe through which tap water flows from the flow sensor 310 for sensing the flow of tap water into the hot water supply heat exchanger 100; "L11" is a hot water supply pipe that supplies hot water heated at the hot water supply heat exchanger 100 to a hot water demand; "L12" is a water supply pipe for supplying the city water flowing into the city water supply pipe L9 to the expansion tank 10 when the heating water is insufficient.

As shown in fig. 3, in the present invention, the th water pipe module 200 and the second water pipe module 300 are respectively constructed in a module unit and are detachably assembled to the hot water supply heat exchanger 100, so that the structures of a water pipe of heating water and a water pipe of tap water/hot water can be simplified, and as a construction directed thereto, the th water pipe module 200 is provided with a three-way valve 210 for switching a flow path of heating water to supply the heating water, which is heated in the main heat exchanger 30 and supplied through the heating water main supply pipe L1, to a heating demand place through the heating water supply pipe L2, or to selectively supply the heating water to the hot water supply heat exchanger 100 side through the heating water inflow pipe L6, a bypass pipe L8 connecting the three-way valve 210 and a heating water return pipe L3, and a check valve 220 provided to the bypass pipe L8 to allow the heating water to flow only in a direction 3 of the heating water return pipe L3 when an overpressure occurs in the heating water supply pipe due to the heating water supply pipe L2 connected to the heating demand place or the heating water inflow pipe L6 connected to the hot water supply heat exchanger 100 side is closed.

The second water pipe module 300 is provided with: a flow sensor 310 for sensing the flow of the tap water flowing in through the tap water supply pipe L9 in the hot water mode; a water supply pipe L12 for supplying heating water by receiving tap water when the heating water is insufficient; and a water supply valve 320 provided in a pipe of the water supply pipe L12 and controlling the flow of the tap water.

Referring to fig. 4 to 7, the hot water supply heat exchanger 100 is constructed of a plate type heat exchanger formed in such a manner that: a plurality of

plates

110, 120, 130-1, 140-1, 130-2, 140-2, 130-3, 140-3, 130-4, 140-4, 150, 160 are stacked, and a heating water flow path P1 and a tap water flow path P2 are formed to be separated from each other, so that heating water and tap water alternately flow in respective layers and heat exchange is performed inside the hot water supply heat exchanger 100. In fig. 3 and 4, solid arrows indicate the flow path of the heating water, broken arrows indicate the flow path of the tap water and the hot water, and fig. 6 and 7 illustrate the case where the heating water flow path P1 and the tap water flow path P2 are separated from each other and alternately formed in respective layers.

Referring to fig. 4, in the plurality of

plates

110, 120, 130-1, 140-1, 130-2, 140-2, 130-3, 140-3, 130-4, 140-4, 150, 160, a flat panel 120 is stacked behind a front panel 110, and th plates 130, 130-1, 130-2, 130-3, 130-4 and second plates 140, 140-1, 140-2, 140-3, 140-4 are alternately stacked behind the flat panel 120, that is, th plates 130-1, second plates 140-1, th plates 130-2, second plates 140-2, th plates 130-3, second plates 140-3, th plates 130-4, second plates 140-4 are sequentially stacked behind the flat panel 120, in this embodiment, although a case where the th plates 130 and the second plates 140 are configured as four pairs of plates is given as an example, it is apparent that the number of the second plates 130 and are different.

A -th flow path switching plate 150 for switching the flow path of the hot water from the rear to the front and a second flow path switching plate 160 for switching the flow path of the heating water from the rear to the front are laminated on the rear.

The plurality of

plates

110, 120, 130-1, 140-1, 130-2, 140-2, 130-3, 140-3, 130-4, 140-4, 150, 160 include

rectangular plane portions

110a, 120a, 130a, 140a, 150a, 160a and

flange portions

110b, 120b, 130b, 140b, 150b, 160b protruding forward from edge portions thereof by a predetermined length, respectively, and the plates stacked in adjacent order are welded and coupled between the

flange portions

110b, 120b, 130b, 140b, 150b, 160b, so that the plates stacked in adjacent order are spaced apart by a predetermined interval to form the heating water flow path P1 and the tap water flow path P2, and simultaneously, fluid flowing through the heating water flow path P1 and the tap water flow path P2 is blocked to prevent the fluid from leaking to the outside.

In order to facilitate the attachment and detachment of the hot water supply heat exchanger 100 to and from the th and second

water tube modules

200 and 300, which are constructed in a module unit, the front panel 110 of the hot water supply heat exchanger 100 is formed with a dual

flow path structure

110c, 110d, i.e., a heating water discharge guide 110c and a hot water discharge guide 110d, for forming a heating water discharge flow path and a hot water discharge flow path.

As a configuration for achieving this, a heating water inflow hole 111 connected to the heating water inflow pipe L6 is formed on the lower portion side of the front panel 110, a heating water discharge hole 112 connected to the heating water outflow pipe L7 is formed on the side of the heating water inflow hole 111, and the heating water discharge guide 110c is formed to guide heating water discharged forward toward the upper portion side of the front panel 110 after passing through the heating water passage P1 to the heating water discharge hole 112.

Further, a city water inlet hole 113 connected to the city water inlet pipe L10 is formed at the other side of the lower portion of the front panel 110, a hot water discharge hole 114 connected to the hot water supply pipe L11 is formed at a position close to the city water inlet hole 113 in a region where the heating water discharge guide portion 110c is not formed at the upper portion of the front panel 110, and the hot water discharge guide portion 110d is formed to guide the hot water discharged forward toward the upper portion side of the front panel 110 after passing through the city water passage P2 to the hot water discharge hole 114.

The flat panel 120 stacked on the rear side of the front panel 110 has a heating water inflow hole 121 formed on a lower side, a heating water discharge hole 122 formed on an upper side, a city water inflow hole 123 formed on a lower side, and a hot water discharge hole 124 formed on an upper side, and the edge portions of the heating water discharge guide 110c and the hot water discharge guide 100d are welded to be in close contact with the flat surface portion 120a of the flat panel 120, and the inner portions of the edge portions of the heating water discharge guide 110c and the hot water discharge guide 100d protrude forward to form a discharge flow path of heating water and hot water.

The th plate 130 laminated on the rear side of the flat panel 120 has a heating water inflow hole 131 formed on the lower portion side, a heating water discharge hole 132 formed on the upper portion side, a city water inflow hole 133 formed on the lower portion side, and a hot water discharge hole 134 formed on the upper portion side, and boss portions 131a, 132a protruding forward to be closely attached to the edges of the heating water inflow hole 121 and the heating water discharge hole 122 of the flat panel 120 are formed on the edges of the heating water inflow hole 131 and the heating water discharge hole 132 of the th plate 130, and a plurality of th beads (beads) 135 protruding forward to be bent toward side are formed on the flat surface portion 130a of the th plate 130.

The second plate 140 laminated on the rear side of the -th plate 130 has a heating water inflow hole 141 formed on the lower portion side, a heating water discharge hole 142 formed on the upper portion side, a city water inflow hole 143 formed on the lower portion side, and a hot water discharge hole 144 formed on the upper portion side, and further,

boss portions

143a, 144a protruding forward and closely contacting the edges of the city water inflow hole 133 and the hot water discharge hole 134 of the -th plate 130 are formed on the edges of the city water inflow hole 143 and the hot water discharge hole 144 of the second plate 140, and a plurality of second beads 145 bent in the opposite direction to the -th beads 135 are formed on the flat surface portion 140a of the second plate 140.

The heating water flow path P1 and the tap water flow path P2 may be alternately formed by being separated into respective layers by the bosses 131a and 132a formed on the first plate and the

bosses

143a and 144a formed on the second plate 140, that is, the tap water flow path P2 may be formed by allowing the flow of the tap water to be realized between the flat plate panel 120 and the second plate 130 but blocking the flow of the heating water by the bosses 131a and 132a formed on the second plate 130, and the heating water flow may be formed by allowing the flow of the heating water to be realized between the second plate 130 and the second plate 140 but blocking the flow of the tap water by the

bosses

143a and 144a formed on the second plate 140 and the heating water flow path P1 may be formed.

Also, if the th plate 130 and the second plate 140 are overlapped, the occurrence of turbulence is promoted to the flow of fluid flowing through the overlapped gap of the th bead 135 formed at the th plate 130 and the second bead 145 formed at the second plate 140, so that the heat exchange efficiency between the heating water and the tap water is improved.

The th plate 130 and the 140 th plate are alternately stacked in plural, and a th flow path switching plate 150 stacked behind the rearmost second plate 140-4 is formed with a heating water inflow hole 151 on the side of the lower portion, a heating water discharge hole 152 on the side of the upper portion, and a front-rear blocked shape on the side and the side of the lower portion, so that the flow path of the city water is switched to the front direction in the city water flow path P2 between the second plate 140-4 and the th flow path switching plate 150, and a plurality of th beads 155 bent toward the side and protruding forward are formed on the flat surface portion 150a of the th flow path switching plate 150.

The flat surface portion 160a of the second flow conversion plate 160 laminated behind the -th flow conversion plate 150 is formed in a shape that is closed off in the front and rear direction of the entire area, so that the flow path of the heating water is converted to the forward direction in the heating water flow path P1 between the -th flow conversion plate 150 and the second flow conversion plate 160, and a plurality of second beads 165 that are curved toward the other side and protrude forward are formed on the flat surface portion 160a of the second flow conversion plate 160.

According to the above-described configuration of the hot water supply heat exchanger 100, the heating water flow path P1 communicating from the lower portion side to the upper portion side and the tap water flow path P2 communicating from the lower portion side to the upper portion side are alternately formed inside the plurality of stacked

plates

110, 120, 130-1, 140-1, 130-2, 140-2, 130-3, 140-3, 130-4, 140-4, 150, 160, and the occurrence of turbulence is promoted to the flow of the fluid flowing through the overlapping gap between the -th beads 135, 155 and the

second beads

145, 165, so that the heat exchange efficiency between the heating water and the tap water can be improved.

The front panel 110 includes a heating water discharge guide 110c for guiding the heating water discharged through the heating water flow path P1 to the heating water discharge hole 112 formed adjacent to the side of the heating water inflow hole 111, and a hot water discharge guide 110d for guiding the hot water discharged after passing through the tap water flow path P2 to the hot water discharge hole 114 formed at a position maximally close to the tap water inflow hole 113, so that the th and second

water tube modules

200 and 300 can be easily attached to and detached from the hot water supply heat exchanger 100.

Further, the th water tube module 200 coupled to the heating water inlet pipe L6 and the heating water outlet pipe L7 can be downsized by forming the interval between the heating water inlet pipe L6 and the heating water outlet pipe L7 connected to the hot water supply heat exchanger 100 to be close to each other.

Similarly, the second water pipe module 300 coupled to the tap water inlet pipe L10 and the hot water supply pipe L11 can be reduced in size by setting the distance between the tap water inlet pipe L10 and the hot water inlet pipe L11 connected to the hot water supply heat exchanger 100 to be close to each other.

In this case, the heating water inflow hole 111 and the heating water discharge hole 112 are formed at side of the hot water supply heat exchanger 100, and the city water inflow hole 113 and the hot water discharge hole 114 are formed at positions spaced apart from the region where the heating water inflow hole 111 and the heating water discharge hole 112 are formed to the other side, so that the water tube module 200 and the second water tube module 300 can be coupled to both side portions of the hot water supply heat exchanger 100.

Hereinafter, the flow path switching and bypass structure of the heating water provided in the -th water tube module 200 will be described in detail with reference to fig. 8 to 12.

The -th water tube module 200 is equipped with a three-way valve 210 for selectively switching the flow path of the heating water flowing in from the heating water main supply pipe L1 connected to the side of the housing 201 to the heating water supply pipe L2 connected to the lower side of the housing 201 or the heating water inflow pipe L6 connected to the other side of the housing 201, and a bypass pipe L8 is communicated with the side wall of the housing 201 on the side of the three-way valve 210, and the pipe of the bypass pipe L8 is equipped with a check valve 220.

As described above, the duct connected to the main heating water supply pipe L1, the heating water supply pipe L2, the heating water inflow pipe L6, and the bypass pipe L8 is formed as one body in the casing 201 of the -th water tube module 200, so that the water tube structure of the heating water can be compactly configured, and the duct length of the water tube can be shortened as compared with a conventional structure in which water tubes are separately provided, so that the pressure loss of the heating water can be reduced, and the heat efficiency of the boiler can be improved.

The three-way valve 210 includes a motor 211, a cam member 212 coupled to a rotation shaft of the motor 211, a main shaft (draft) 213 having an upper end supported by the cam member 212 and moved up and down, a valve body 214 coupled to a lower outer surface of the main shaft 213, an elastic member 215 applying an elastic force in a direction to the main shaft 213 to maintain the upper end of the main shaft 213 in contact with a lower end of the cam member 212, and a valve sheet 216 having an upper locking step 216a for locking the upper end of the valve body 214 according to the movement of the main shaft 213 and a lower locking step 216b for locking the lower end of the valve body 214, so that a flow path of the heating water flowing into the inside of the housing 201 through the heating water main supply pipe L1 is selectively switched to the heating water supply pipe L2 or the heating water inflow pipe L6.

The bypass pipe L8 is formed to penetrate through a side wall of the housing 201 in a region between the upper locking step 216a and the lower locking step 216b of the valve sheet 216, and is formed to communicate with the heating water return pipe L3.

Referring to fig. 11 and 12, the check valve 220 includes a body 221 having an inlet 221a formed therein, the inlet 221a communicating with a bypass duct L8 formed in a side wall of the housing 201, a valve body 222 including a shaft 222a and a valve portion 222b inserted into the body 221 to open and close a flow path of the heating water flowing through the inlet 221a, an elastic member 223 interposed around an outer periphery of the shaft 222a to provide an elastic force to the valve portion 222b in a direction closing the flow path of the heating water, and a fastening portion 224 having an insertion groove 224a formed therein to which the shaft 222a of the valve body 222 is coupled and fastened to the body 221.

According to the above-described configuration of the check valve 220, only when the pressure of the heating water flowing into the inlet 221a of the body 221 exceeds the elastic force of the elastic member 223 and the overpressure occurs in the heating pipe, the flow path of the heating water is opened so that the heating water flows into the heating water return pipe L3 through the bypass pipe L8, and when the pressure of the heating water is equal to or lower than the elastic force of the elastic member 223, the holding valve and the body 222 close the flow path of the heating water.

Hereinafter, a heating mode and a hot water mode of the boiler and a flow path of heating water and hot water when overpressure occurs will be described with reference to fig. 13 to 15.

Referring to fig. 13, in the heating mode, the heating water heated in the main heat exchanger 30 is supplied to the three-way valve 210 side along the heating water main supply pipe L1, and in this case, the three-way valve 210 is set to be closed toward the heating water inflow pipe L6 side and opened toward the heating water supply pipe L2 side, and the heating water passing through the three-way valve 210 is supplied to the heating-required place along the heating water supply pipe L2. The heating water having transferred heat through the heating demand flows into the expansion tank 10 through the heating water return pipe L3, and the heating water stored in the expansion tank 10 is supplied to the main heat exchanger 30 along the heating water circulation inflow pipe L4 and the heating water circulation outflow pipe L5 by the operation of the circulation pump 20, heated, and then circulated.

Referring to fig. 14, in the hot water mode, the heating water heated in the main heat exchanger 30 is supplied to the three-way valve 210 along the heating water main supply pipe L1, and in this case, the three-way valve 210 is set to be closed toward the heating water supply pipe L2 and opened toward the heating water inflow pipe L6, and the heating water passing through the three-way valve 210 is supplied to the hot water supply heat exchanger 100 along the heating water inflow pipe L6. The heating water having transferred heat to the city water in the hot water supply heat exchanger 100 flows into the expansion tank 10 along the outflow pipe L7 and the heating water return pipe L3, and the heating water stored in the expansion tank 10 is supplied to the main heat exchanger 30 along the heating water circulation inflow pipe L4 and the heating water circulation outflow pipe L5 by the operation of the circulation pump 20, heated, and then circulated.

At the same time, the tap water flowing in through the tap water supply pipe L9 is supplied to the hot water supply heat exchanger 100 through the flow sensor 310 and the tap water inflow pipe L10, and the hot water heated by the heat of the heating water transferred through the hot water supply heat exchanger 100 is supplied to a hot water demand place through the hot water supply pipe L11.

Referring to fig. 15, in the heating mode, when the heating water supply pipe L2 connected from the three-way valve 210 to a heating demand place is closed, or in the hot water mode, the heating water inflow pipe L6 connected from the three-way valve 210 to the heating water supply heat exchanger 100 side is closed and overpressure occurs in the heating pipe, the check valve 220 provided in the pipe of the bypass pipe L8 is opened, and the heating water supplied to the three-way valve 210 through the heating water main supply pipe L1 is flowed into the expansion tank 10 through the bypass pipe L8 and the heating water return pipe L3, thereby relieving the overpressure condition occurring in the heating pipe. Therefore, damage to other components including circulation pump 20 caused when overpressure occurs in the heating pipe can be prevented, and durability can be improved.

In the present specification, a case where the hot water supply heat exchanger 10 realizes heat exchange between the heating water and the tap water is given as an example, but the hot water supply heat exchanger 100 can be adopted also in a case where heat exchange between two fluids different from each other is possible in addition to water.

As described above, the present invention is not limited to the above-described embodiments, and obvious modifications can be implemented by those having basic knowledge in the art within the scope not departing from the technical idea of the present invention claimed in the claims, and such modifications fall within the scope of the present invention.

Claims

A boiler of type having a check valve integrated with a water pipe , and including a main heat exchanger (30) for heating water by combustion heat of a heater and a hot water supply heat exchanger (100) for supplying hot water by heat exchange between the heating water heated by the main heat exchanger (30) and tap water, the boiler comprising:

a three-way valve (210) for switching a flow path of heating water to supply the heating water heated at the main heat exchanger (30) to a heating demand or selectively supplying the heating water to the hot water supply heat exchanger (100) side;

a bypass pipe (L8) connecting the three-way valve (210) and a heating water return pipe (L3), the heating water return pipe (L3) connecting the heating demand point and the main heat exchanger (30); and

a check valve (220) provided in a pipe of the bypass pipe (L8) and allowing a flow of fluid only in directions from the three-way valve (210) to the heating water return pipe (L3) in the case where an overpressure occurs due to a closed heating pipe (L2) connected to the heating required place side or a heating pipe (L6) connected to the hot water supply heat exchanger (100) side,

the hot water supply heat exchanger (100) is constructed in such a manner that: a plurality of plates are stacked, and a heating water flow path (P1) and a tap water flow path (P2) are formed separately from each other to alternately flow heating water and tap water in respective layers in the hot water supply heat exchanger (100) to perform heat exchange,

among the plurality of plates, a front panel (110) positioned at the front is provided with a heating water discharge guide (110c) for forming a flow path of heating water so that a heating water outlet pipe (L7) is positioned at a position close to the heating water inlet pipe (L6), the heating water outlet pipe (L7) allowing the heating water to flow into the heating water inlet pipe (L6) formed at the lower portion side of the front panel (110) and to be discharged after passing through the heating water flow path (P1), and a hot water discharge guide (110d) for forming a flow path of hot water so that a hot water outlet pipe (L11) is positioned at a position close to the tap water inlet pipe (L10), the hot water outlet pipe (L11) allowing the hot water to flow into the tap water inlet pipe (L10) formed at the lower portion side of the front panel (110) and to be discharged after passing through the tap water flow path (P2),

the three-way valve (210), the bypass pipe (L8) and the check valve (220) are provided in -piece type in the same water pipe module.
2. The boiler having the check valve integrated with the water pipe as recited in claim 1,

a circulation pump (20) for feeding heating water under pressure in directions toward the main heat exchanger (30) side is provided in the heating pipes (L4, L5) connected to the heating water return pipe (L3).
3. The boiler having the check valve integrated with the water pipe as recited in claim 1,

when the heating pipe (L2) connected to the heating demand side or the heating pipe (L6) connected to the hot water supply heat exchanger (100) side is closed and overpressure occurs,

the heating water heated in the main heat exchanger (30) is supplied to the three-way valve (210), flows into a bypass pipe (L8) communicating with the side of the three-way valve (210), passes through the check valve (220), flows into the expansion tank (10), and circulates to the main heat exchanger (30) by the circulation pump (20) so that the heating water stored in the expansion tank (10) is prevented from being overpressurized in the heating pipe.
4. The boiler having the check valve integrated with the water pipe as claimed in claim 1, comprising:

an -th water pipe block (200) having a side detachably attached to a heating water inflow pipe (L6) and a heating water outflow pipe (L7) of the hot water supply heat exchanger (100), and the three-way valve (210), the bypass pipe (L8) and the check valve (220) are arranged in a -type configuration, thereby providing a flow path for returning the heating water supplied from the main heat exchanger (30) through a heating-required place or the hot water supply heat exchanger (100);

the second water pipe module (300), side is detachably assembled with a tap water inflow pipe (L10) and a hot water supply pipe (L11) of the hot water supply heat exchanger (100), and provides a flow path of tap water and hot water through the hot water supply heat exchanger (100).
5. The boiler having the check valve integrated with the water pipe as recited in claim 4,

a heating water inflow hole (111) connected to the heating water inflow pipe (L6) is formed at a lower portion side of the front panel (110),

a heating water discharge hole (112) connected to the heating water outlet pipe (L7) is formed on the side of the heating water inlet hole (111),

the heating water discharge guide (110c) is formed to guide the heating water discharged forward toward the other side of the upper portion of the front panel (110) to the heating water discharge hole (112).
6. The boiler having the check valve integrated with the water pipe as recited in claim 5,

a tap water inlet hole (113) connected to the tap water inlet pipe (L10) is formed at the other side of the lower part of the front panel (110),

a hot water discharge hole (114) connected to the hot water supply pipe (L11) is formed at a position close to the tap water inlet hole (113) in a region where the heating water discharge guide (110c) is not formed on the upper portion of the front panel (110),

the hot water discharge guide (110d) is formed to guide the hot water discharged forward toward the upper portion of the front panel (110) to the hot water discharge hole (114).
7. The boiler having the check valve integrated with the water pipe as recited in claim 6,

a flat panel (120) is laminated behind the front panel (110), the flat panel (120) having a heating water inflow hole (121) formed on a lower portion side, a heating water discharge hole (122) formed on an upper portion side, a tap water inflow hole (123) formed on a lower portion side, and a hot water discharge hole (124) formed on an upper portion side,

the edge portions of the heating water discharge guide (110c) and the hot water discharge guide (100d) are in close contact with the flat panel (120), and the inner side portions of the edge portions protrude forward to form a discharge flow path for the heating water and the hot water.
8. The boiler having the check valve integrated with the water pipe as recited in claim 7,

a plurality of -th plates (130) and second plates (140) formed so that boss portions positioned in diagonal directions are staggered in the front-rear direction are alternately stacked behind the flat panel (120) to alternately form the heating water flow path (P1) and the tap water flow path (P2),

a plurality of -th beads (135) and second beads (145) bent in opposite directions are formed on the -th plate (130) and the second plate (140), and are configured to enable fluid to flow to an overlapping gap of the -th beads (135) and the second beads (145).
9. The boiler having the check valve integrated with the water pipe as recited in claim 8,

an th flow path switching plate 150 and a second flow path switching plate 160 are sequentially stacked behind the second plate 140 stacked on the rearmost side, wherein the th flow path switching plate 150 turns the flow path of the tap water from the rear to the front, and the second flow path switching plate 160 turns the flow path of the heating water from the rear to the front.
10. The boiler having the check valve integrated with the water pipe as recited in claim 9,

the -th flow path switching plate (150) has a heating water inflow hole (151) formed on the lower portion side, a heating unit discharge hole (152) formed on the upper portion side, and a lower portion side and an upper portion side which are closed in the front-rear direction,

the second flow path switching plate (160) is configured in a shape in which the entire region is closed in the front-rear direction.
11. The boiler having the check valve integrated with the water pipe as recited in claim 4,

the second water pipe module (300) is provided with: a flow sensor (310) for sensing the flow of the tap water flowing into the tap water inflow pipe (L10); a water supply pipe (L12) for supplying heating water by receiving the inflow of tap water when the heating water is insufficient; and a water replenishing valve (320) which is provided in a pipe of the water replenishing pipe (L12) and controls the flow of tap water.