KR20200061715A - Boiler with stable hot water supply - Google Patents

Abstract

The present invention is to provide a boiler capable of stably supplying hot water, which can stably supply hot water according to a temperature set by a user and also can simplify and downsize a room heating water pipeline and a direct water/hot water pipeline structure. To implement this, the present invention provides the boiler equipped with a main heat exchanger (30) heating the room heating water by combustion heat of a burner (31) and a hot water supply heat exchanger (100) supplying hot water by exchanging heat between the room heating water, heated by the main heat exchanger (30), and direct water, includes a direct water/hot water pipeline module (300) having a flow control valve (310) provided in a direct water supply pipe supplying the direct water to the hot water supply heat exchanger (100) to control supply flow of the direct water and a mixing valve (320) branching off from the direct water supply pipe to be provided in a direct mixing pipe connected to the direct water supply pipe supplying the hot water heated due to the heat exchange with the room heating water in the hot water supply heat exchanger (100) and to mix the direct water with the hot water having passed through the hot water supply heat exchanger (100), and providing flow paths for the direct water and the hot water passing through the hot water supply heat exchanger (100) and a flow path for the direct water mixed with hot water.

Description

Boiler with stable hot water supply

The present invention relates to a boiler capable of supplying stable hot water, and more specifically, it is possible to supply stable hot water in accordance with the temperature set by the user, and to simplify and miniaturize the structure of heating water supply pipe and direct/hot water supply pipe. It relates to a boiler capable of supplying a stable hot water.

In general, a boiler is a device that heats heating water by the combustion heat of a burner and supplies heated water to a heating element to be used for heating, or to supply hot water by heat exchange between heated water and direct water.

Conventional boilers, the main heat exchanger for heating the heating water by the combustion heat of the burner, a circulation pump installed in the flow path of the heating water for forced circulation of the heating water, supplying the heating water heated in the main heat exchanger to the heating element or hot water supply A three-way valve that switches the flow path of the heating water to selectively supply it to the heat exchanger side, a hot water heat exchanger that supplies hot water by heat exchange between heated water and direct water heated in the main heat exchanger, and heating water that is returned through a heating requirement. It comprises an expansion tank that is heated and circulated through the hot water heat exchanger is recovered and stored.

In the conventional boiler, in the hot water mode using hot water, a flow flow switch (flow rate sensor) that detects the flow of direct water into a direct water supply pipe through which direct water flows into and is supplied to a hot water heat exchanger, and the flow rate of direct water by a mechanical structure To control the temperature of the hot water supplied to the user by controlling the burner amount based on the temperature information of the hot water passing through the hot water heat exchanger and the temperature of the hot water passing through the hot water heat exchanger. However, according to this configuration, there is a limitation in that the temperature of the hot water supplied to the user cannot be stably supplied in accordance with the target hot water temperature set by the user. Prior art related to this is disclosed in Korean Patent Publication No. 10-2014-0060773.

On the other hand, while the boiler is set to operate in the heating mode or the hot water mode, when the user arbitrarily closes the heating pipe or the heating pipe is blocked due to accumulation of foreign substances in the heating pipe, an overpressure exceeding the allowable pressure occurs in the heating pipe. In this case, damage to the boiler parts including the circulation pump may be caused. As a configuration for preventing the occurrence of overpressure in the heating pipe, in Patent Publication No. 1998-016052, a bypass hole is formed in one side of the discharge pipe between two upper and lower opening and closing holes formed in the discharge pipe of the bidirectional circulation pump, and the bypass hole A configuration in which a bypass pipe is connected between a heating water return pipe and a heating water is disclosed.

According to this configuration, there is an advantage that can prevent the overheating of the heating pipe, but the bypass pipe connecting the two-way circulation pump and the heating water return pipe is always open through the bypass hole, so the heating pipe Even in this unclosed normal state, in the heating mode and the hot water mode, a part of the heated water leaks through the bypass pipe to the heating water return pipe, so there is a disadvantage that the heat exchange efficiency of the heating water decreases, and an expensive two-way circulation pump It has the disadvantage that the manufacturing cost of the boiler increases as it is provided.

On the other hand, the hot water heat exchanger, a fin-tube type heat exchanger in the form of inserting a plurality of tubes into a tank, and a plurality of plates are stacked so that heating water and direct water flow alternately in each layer and heat exchange is performed. It can be classified as a plate heat exchanger configured to be built. Among these, the plate-type heat exchanger has the advantage of being easy to assemble and reducing the number of parts and volume to increase productivity compared to the fin-tube type heat exchanger.

The general structure of such a plate-shaped heat exchanger in which a plurality of plates are stacked is disclosed in Patent Nos. 10-1151754 and 10-2003-0071249.

The conventional general plate heat exchanger according to the prior art is configured to increase heat exchange efficiency, and the heating water inlet and the heating water outlet are formed on the lower one side and the upper other side of the plate, and the direct water inlet and hot water outlet are the lower other side and upper portion of the plate. It is formed on one side, and is configured such that heating water and direct water flow in countercurrent and heat exchange is performed. However, the conventional plate heat exchanger has a water pipe through which heating water flows, and a water pipe through which direct water (hot water) flows, is formed to be spaced apart from each other at a diagonal position of the plate, and thus the water pipe connected to the heating water inlet and the heating water outlet. , As the water pipes connected to the direct water inlet and the hot water outlet are separately installed at separate locations, the water pipe structure of the heating water and the water pipe structure of the direct water (hot water) are complicated and occupy a large installation space. It is difficult to miniaturize, there is a problem that the thermal efficiency is lowered due to the pressure loss occurs as the pipe line of the water pipe becomes longer.

The present invention has been devised to solve the above-mentioned problems, and it is possible to provide stable hot water in accordance with the temperature set by the user, and to provide a stable and compact structure for heating water piping and direct/hot water piping. The object is to provide a boiler capable of supplying hot water.

The boiler capable of supplying hot water in a stable manner according to the present invention for realizing the above-mentioned object includes a main heat exchanger 30 for heating the heating water by the combustion heat of the burner 31, and heating heated in the main heat exchanger 30 In a boiler having a hot water heat exchanger (100) for supplying hot water by heat exchange between water and direct water, the boiler is provided in a direct water supply pipe through which hot water is directly supplied to the hot water heat exchanger (100) to control the flow rate of direct water supply. The valve 310 is provided in a direct water mixing pipe that is branched from the direct water supply pipe and connected to a direct water supply pipe through which hot water heated by heat exchange with heating water in the hot water supply heat exchanger 100 is supplied to the hot water heat exchanger 100 ) Is provided with a mixing valve 320 for mixing direct water with hot water that has passed through, and direct/hot water that provides direct and hot water flow paths passing through the hot water heat exchanger 100 and direct flow paths mixed with the hot water. It includes a piping module 300.

A first temperature sensor (S1) for detecting the temperature of the direct water supplied to the hot water heat exchanger (100), a second temperature sensor (S2) for detecting the hot water temperature immediately after passing through the hot water heat exchanger (100) , And a third temperature sensor (S3) for detecting the temperature of the hot water after the direct water is mixed with the hot water passing through the hot water heat exchanger (100); Based on the temperature information detected by the first temperature sensor (S1), the second temperature sensor (S2) and the third temperature sensor (S3), the hot water temperature detected by the third temperature sensor (S3) by the user It may be configured to further include a control unit 400 for controlling the opening amount of the flow control valve 310 and the mixing valve 320 to reach the set target hot water temperature.

Further comprising a fourth temperature sensor (S4) for detecting the temperature of the heating water passing through the hot water heat exchanger (100), the control unit 400 of the heating water detected by the fourth temperature sensor (S4) Based on the temperature, it may be configured to control the amount of combustion of the burner 31 so that the hot water temperature sensed by the third temperature sensor S3 reaches the target hot water temperature set by the user.

The direct water/hot water water piping module 300, the direct water is introduced, the first direct water supply pipe (L9) connected to the inlet of the flow control valve 310, the outlet of the flow control valve 310 and the hot water heat exchanger ( The second direct water supply pipe (L10) and the third direct water supply pipe (L11) connected to the direct water inlet of 100), the first hot water supply pipe (L12) and the second hot water supply pipe through which the hot water passed through the hot water heat exchanger (100) are supplied ( L13), the second direct water supply pipe (L10) and the third direct water supply pipe (L11) and the first direct mixing pipe (L14) connected to the inlet of the mixing valve 320, and the first hot water supply pipe (L12) And the second hot water supply pipe (L13) of the connecting portion and the mixing valve 320 connected to the outlet of the second direct mixing pipe (L15) may be provided as an integrated water pipe module.

To supply the heating water heated in the main heat exchanger (30) to the heating water supply pipe (L2) connected to the heating demand side, or selectively to the heating water inlet pipe (L6) connected to the hot water heat exchanger (100) side Three-way valve 210 for switching the flow path of the heating water; It provides a separate flow path from the heating water supply pipe (L2) and the heating water inlet pipe (L6) and is formed on one side of the three-way valve 210 to connect the heating element and the main heat exchanger (30). A bypass pipe (L8) connected to the heating water return pipe (L3); When the overheating occurs because the heating water supply pipe (L2) or the heating water inlet pipe (L6) is closed when it is provided in the pipeline of the bypass pipe (L8), the heating water return pipe from the three-way valve 210 A check valve 220 that allows the flow of fluid only in one direction toward (L3); And the three-way valve 210 and the bypass pipe (L8) and the check valve 220 is provided integrally therein, the heating water supplied from the main heat exchanger 30 is a heating element or hot water supply heat exchanger (100) It may be configured to further include; a heating water supply pipe module 200 that provides a flow path that is returned through the flow path, and a flow path that is returned through the bypass pipe L8.

When the heating water supply pipe (L2) connected to the heating request side or the heating water inlet pipe (L6) connected to the hot water heat exchanger (100) is closed, overheating occurs, the heating heated in the main heat exchanger (30) After the water is supplied to the three-way valve 210, it flows into the bypass pipe L8 communicated to one side of the three-way valve 210, passes through the check valve 220, and then expands the expansion tank 10. ), the heating water stored in the expansion tank 10 may be configured to circulate through the main heat exchanger 30 by the circulation pump 20 to prevent the occurrence of overpressure in the heating pipe.

In the hot water heat exchanger 100, a plurality of plates are stacked so that heating water and direct water flow alternately in each layer, and the heating water flow path P1 and the direct water flow path P2 are separated from each other so that heat exchange is performed. After being formed, the front plate 110 located in the front of the plurality of plates is introduced into the heating water inlet pipe L6 formed on the lower side of the front plate 110 and passes through the heating water flow path P1. A heating water discharge guide portion 110c forming a flow path of heating water so that the discharged heating water outlet pipe L7 is located close to the heating water inlet pipe L6, and the lower other side of the front plate 110. Hot water discharge forming a flow path of hot water so that the first hot water supply pipe (L12), which is introduced into the formed direct water supply pipe (L11) and discharged after passing through the direct water flow path (P2), is located close to the third direct water supply pipe (L11). The guide portion 110d may be formed.

One side of the heating water pipe module 200 is assembled so that the heating water inlet pipe (L6) and the heating water outlet pipe (L7) of the hot water heat exchanger (100) are detached, and the direct/hot water piping module (300) ) May be assembled such that the direct water supply pipe L11 and the hot water supply pipe L12 of the hot water heat exchanger 100 are detachable.

On the lower side of the front plate 110, a heating water inlet hole 111 connected to the heating water inlet pipe L6 is formed, and on one side of the heating water inlet hole 111, the heating water outlet pipe A heating water outlet hole 112 connected to the (L7) is formed, and the heating water discharge guide part 110c discharges the heating water discharged forward toward the upper other side of the front plate 110. It may be formed to guide the ball 112.

On the other side of the lower side of the front plate 110, a direct water inlet hole 113 connected to the direct water supply pipe L11 is formed, and the heating water discharge guide part 110c is formed on the upper side of the front plate 110. A hot water outlet hole 114 connected to the hot water supply pipe L12 is formed at a position close to the direct water inlet hole 113 in an area that is not, and the hot water discharge guide part 110d includes the front plate 110 It may be formed to direct the hot water discharged toward the upper side of the hot water outlet hole 114.

At the rear of the front plate 110, a heating water inlet hole 121 is formed at one lower side, a heating water outlet hole 122 is formed at the other upper side, and a direct water inlet hole 123 is formed at the lower other side. , A flat plate 120 having a hot water outlet hole 124 formed on one side of the upper portion is stacked, and the edge portions of the heating water discharge guide portion 110c and the hot water discharge guide portion 100d are in close contact with the flat plate 120 And, the inner portion of the rim portion may be configured to protrude forward to form a discharge passage for heating water and hot water.

A plurality of first plates 130 and a second formed at the rear of the flat plate 120 so that the boss portions positioned in the diagonal direction cross the front and rear so that the heating water flow path P1 and the direct water flow path P2 are alternately formed. Plates 140 are alternately stacked, and the first plate 130 and the second plate 140 are formed with a plurality of first beads 135 and second beads 145 bent in opposite directions. The first bead 135 and the second bead 145 may be configured to allow fluid to flow through the overlapped gap.

At the rear of the second plate 140 stacked at the rearmost side, the first flow path switching plate 150 for switching the direct flow path from the rear toward the front, and the flow path of the heating water from the rear to the front. The second flow path switching plate 160 for switching may be sequentially stacked.

In the first flow path conversion plate 150, a heating water inflow hole 151 is formed at one lower side, and a heating water outlet hole 152 is formed at the other upper side, and the lower other side and the upper one side are blocked in the front-rear direction. Made, the second flow path switching plate 150 may be formed in a shape in which the entire area is blocked forward and backward.

The direct water/hot water water piping module 300 is provided in a water supply pipe (L16) for replenishing heating water by receiving direct water when there is a shortage of heating water, and a flow of direct water provided in a pipeline of the water supply pipe (L16) A supplementary water valve 330 that regulates the pressure may be provided.

According to the boiler capable of providing a stable hot water supply according to the present invention, by providing a flow control valve for adjusting the supply flow rate of direct water and a mixing valve for mixing direct water with hot water passing through a hot water heat exchanger, the hot water temperature set by the user is provided. In accordance, it is possible to supply stable hot water.

In addition, the heating water supplied from the main heat exchanger is a heating source or a hot water heat exchanger, and a flow path through which the heat is returned, and a heating water supply pipe module that provides a flow path through the bypass pipe, and direct water through a hot water heat exchanger. By configuring the direct water/hot water water piping module to provide the flow path of the hot water and the direct flow path mixed with the hot water in a module unit so as to be detachable from the hot water heat exchanger, the assembly structure between the water pipe parts is simplified and the number of parts is reduced. Product productivity can be improved.

In addition, a heating water discharge guide part and a hot water discharge guide part are formed on the front plate of the hot water heat exchanger so that the distance between the heating water inlet pipe and the heating water outlet pipe and the distance between the direct water supply pipe and the hot water supply pipe are closely located. By configuring the water piping module and the direct/hot water piping module to be detachable to the hot water heat exchanger, it enables the miniaturization of the boiler and shortens the connection passage of the water piping to reduce the pressure loss due to the pressure drop of the fluid, thereby reducing the pressure of the boiler. Heat exchange performance can be improved.

1 is a view schematically showing the configuration of a boiler according to the present invention,
2 is a control block diagram of a boiler according to the present invention,
3 is a perspective view of a main part of a boiler according to the present invention,
Figure 4 is a perspective view showing the separation of Figure 3 in units,
Figure 5 is an exploded perspective view of the heat exchanger shown in Figure 4,
Figure 6 is a front view of the heat exchanger,
7 is a cross-sectional view taken along line AA of FIG. 6,
8 is a cross-sectional view along the line BB of FIG. 6,
9 is a perspective view of the heating water water pipe module shown in FIG. 4 when viewed from the rear side;
FIG. 10 is a perspective view of the direct/hot water piping module shown in FIG. 4 viewed from another direction on the front side;
11 is a perspective view of the direct/hot water piping module shown in FIG. 4 when viewed from the rear side;
12 is a view showing the flow path of the heating water in the heating mode in the boiler according to the present invention,
13 is a view showing a flow path of heating water and direct water/hot water in the hot water mode in the boiler according to the present invention;
14 is a view showing a flow path in which the heating water is bypassed to prevent overpressure when the heating water supply side or the heating pipe on the hot water heat exchanger side is closed in the boiler of the present invention.

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

Referring to Figures 1 to 4, the heating tank circulating the inside of the boiler in the heating mode or hot water mode to return through the heating requirements in the heating mode is stored in the expansion tank 10 and the discharged from the expansion tank 10 A circulation pump (20) that pressurizes the heating water in one direction, a main heat exchanger (30) for heating the heating water flowing through the circulation pump (20) by the combustion heat of the burner (31), and the main heat exchanger (30) Hot water heat exchanger (100) for supplying hot water by heat exchange between heating water and direct water heated in ), and heating water supplied from the main heat exchanger (30) is returned through a heating element or a hot water heat exchanger (100). The heating water supply pipe module 200 providing a bypass path for preventing overpressure in the flow path and the heating pipe, and the flow path of direct and hot water passing through the hot water heat exchanger 100, and the direct flow of water mixed into the hot water It is configured to include a flow path and a direct/hot water piping module 300 that provides a supplementary flow path for heating water.

The reference numeral'L1' shown in FIG. 1 is a heating water main supply pipe through which heating water heated in the main heat exchanger 30 is supplied to the three-way valve 210, and'L2' is a heating requirement from the three-way valve 210 in the heating mode. The heating water supply pipe through which heating water is supplied,'L3' is the heating water return pipe through which heating water passes through the heating requirements to the expansion tank 10, and'L4' is the heating water circulating pump discharged from the expansion tank 10 ( 20) the heating water circulation inlet pipe,'L5' is the heating water circulation outlet pipe supplied from the circulation pump 20 to the main heat exchanger 30,'L6' is the three-way valve 210 in the hot water mode ), the heating water inlet pipe from which the heating water is supplied to the hot water heat exchanger 100,'L7' is the heating water outlet pipe from which the hot water is exchanged from the hot water heat exchanger 100 to the heating water return pipe (L3),'L8' is In order to prevent an overpressure condition in the heating pipe, a bypass pipe through which the heating water is discharged from the three-way valve 210 to the heating water return pipe L3,'L9, L10, L11' is the first to the direct flow of water into the boiler. The third direct water supply pipe,'L12, L13' is the first to second hot water supply pipe where hot water heated in the hot water heat exchanger 100 is supplied to the hot water source, and'L14, L15' is passed through the hot water heat exchanger 100. The first to second direct mixing pipes,'L16', which provide a direct flow path mixed with hot water, are water that flows directly into the expansion tank 10 when the shortage of heating water is insufficient. Each supplement tube is shown.

In the present invention, the heating water water piping module 200 and the direct water/hot water water piping module 300 are each configured as a module unit and detachably assembled to the hot water heat exchanger 100, so that the water piping of the heating water and the direct water/hot water It is structured to simplify the water piping structure.

As a configuration for this, the heating water supply pipe module 200 supplies the heating water heated in the main heat exchange 30 and supplied through the heating water main supply pipe L1 to the heating requirements through the heating water supply pipe L2. Or, three-way valve 210 for switching the flow path of the heating water to selectively supply to the hot water heat exchanger 100 through the heating water inlet pipe (L6), the three-way valve 210 and the heating water return pipe ( L3) is connected to the bypass pipe (L8), the bypass pipe (L8) is provided in the heating water supply pipe (L2) or the heating water inlet pipe connected to the hot water heat exchanger (100) side When the pipeline of (L6) is closed and overpressure occurs in the heating pipe, a check valve 220 is provided to allow the flow of fluid in only one direction from the three-way valve 210 toward the heating water return pipe L3.

The direct water/hot water water piping module 300 is provided in the pipelines of the first direct water supply pipe L1 and the second direct water supply pipe L2 to control the flow rate of direct water supplied in the hot water mode. ), the mixing valve 320 for mixing direct water in the hot water passing through the hot water heat exchanger 100 is provided in the pipeline of the first direct mixing pipe (L14) and the second direct mixing pipe (L15), and the water A supplementary water valve 330 is provided in the pipe line of the supplementary pipe L16 to interrupt the flow of the direct water in order to supplement the heating water by receiving the direct water when the heating water is insufficient.

In addition, the direct water / hot water piping module 300, the first temperature sensor (S1) for detecting the temperature of the direct water supplied to the hot water heat exchanger (100), immediately after passing through the hot water heat exchanger (100) A second temperature sensor (S2) for detecting the hot water temperature, a third temperature sensor (S3) for detecting the hot water temperature after the direct water is mixed with the hot water passing through the hot water heat exchanger (100), and the hot water It includes a fourth temperature sensor (S4) for detecting the temperature of the heating water passing through the heat exchanger (100).

In addition, the boiler of the present invention, the user selects a heating mode and a hot water mode, the mode and temperature setting unit 410 for setting the heating temperature and the hot water temperature, and the first to fourth temperature sensors (S1, S2, Based on the temperature information detected in S3, S4), the flow rate control valve 310 and the mixing valve 320 so that the hot water temperature sensed by the third temperature sensor S3 reaches the target hot water temperature set by the user. Further comprising a control unit 400 for controlling the opening amount and the combustion amount of the burner 31. In addition, the control unit 400 controls to switch the flow path of the heating water from the three-way valve 210 to the heating request or the hot water heat exchanger 100 side according to the heating mode or the hot water mode selected by the mode and temperature setting unit 410. do.

In one embodiment, when the hot water temperature sensed by the third temperature sensor S3 is higher than the target hot water temperature set by the user, the control unit 400 opens the flow control valve 310 and the mixing valve 320. At the same time, the amount of combustion of the burner 31 is controlled to be lowered while controlling the amount to be increased. Conversely, when the hot water temperature detected by the third temperature sensor S3 is lower than the target hot water temperature set by the user, the control unit 400 has a small opening amount of the flow control valve 310 and the mixing valve 320. The burner 31 is controlled to increase the combustion amount.

In the hot water mode, by controlling the opening amount of the flow control valve 310 and the mixing valve 320 and the combustion amount of the burner 31, hot water can be stably supplied to the user in accordance with the target hot water temperature set by the user. .

In another embodiment, by maintaining the constant amount of combustion of the burner 31, by controlling the opening degree of one or more of the flow control valve 310 and the mixing valve 320, the temperature of the hot water supplied to the user It can be controlled to reach the target hot water temperature.

Hereinafter, a configuration of the hot water heat exchanger 100 will be described with reference to FIGS. 5 to 8. The hot water heat exchanger 100, 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 the heating water and direct water flow alternately in each layer to exchange heat. The heating water flow path (P1) and the direct water flow path (P2) are formed to be separated from each other to form a plate heat exchanger. In FIG. 5, solid arrows indicate flow paths of heating water, and dotted arrows indicate flow paths of direct water and hot water, and in FIGS. 7 and 8, the heating water flow path P1 and the direct water flow path P2 are separated from each other. Each layer is formed alternately.

Referring to Figure 5, the plurality of plates (110,120,130-1,140-1,130-2,140-2,130-3,140-3,130-4,140-4,150,160), the flat plate 120 is laminated to the rear of the front plate 110, the flat plate At the rear of the plate 120, the first plates 130; 130-1, 130-2, 130-3, 130-4 and the second plates 140; 140-1, 140-2, 140-3, 140-4 are alternately stacked. That is, the first plate 130-1, the second plate 140-1, the first plate 130-2, the second plate 140-2, the first plate ( 130-3), the second plate 140-3, the first plate 130-4, and the second plate 140-4 are sequentially stacked. However, in this embodiment, the case where the first plate 130 and the second plate 140 are composed of four pairs of plates is exemplified, but the first plate 130 and the second plate 140 are stacked. Of course, the number may be configured differently.

In addition, a first 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 stacked on the rear side.

The plurality of plates (110,120,130-1,140-1,130-2,140-2,130-3,140-3,130-4,140-4,150,160), each of the rectangular flat portion (110a,120a,130a,140a,150a,160a), and the front of the border portion Plates protruding a predetermined length to include a flange portion (110b, 120b, 130b, 140b, 150b, 160b), the plates stacked adjacent to the front and rear are welded between the flange portions (110b, 120b, 130b, 140b, 150b, 160b) Combined, adjacently stacked plates are spaced apart at regular intervals to form the heating water flow path P1 and the direct water flow path P2, and the fluid flowing through the heating water flow path P1 and the direct water flow path P2 to the outside. It is blocked to prevent leakage.

The hot water heat exchanger 100 is on the front plate 110 of the hot water heat exchanger 100 so as to facilitate attachment and detachment between the heating water water pipe module 200 composed of module units and the direct/hot water water pipe module 300. A dual flow path structure 110c, 110d forming a discharge passage for heating water and a discharge passage for hot water, that is, a heating water discharge guide part 110c and a hot water discharge guide part 110d is formed.

As a configuration for this, a heating water inflow hole 111 connected to a heating water inflow pipe L6 is formed at a lower side of the front plate 110, and a heating water outlet pipe is formed at one side of the heating water inflow pipe 111. A heating water outlet hole 112 connected to the (L7) is formed, and the heating water discharge guide part 110c is discharged forward toward the upper other side of the front plate 110 after passing through the heating water flow path P1. It is formed so as to guide the heating water to the heating water outlet hole (112).

In addition, a direct water inflow hole 113 connected to the third direct water supply pipe L11 is formed on the other lower side of the front plate 110, and the heating water discharge guide part 110c is formed on the upper side of the front plate 110. A hot water outlet hole 114 connected to the first hot water supply pipe L12 is formed at a position close to the direct water inflow hole 113 among the areas that are not, and the hot water discharge guide part 110d provides a direct water flow path P2. It is formed to guide the hot water discharged forward toward the upper one side of the front plate 110 after passing through the hot water outlet hole 114.

The flat plate 120 stacked on the rear of the front plate 110 has a heating water inlet hole 121 formed at one lower side, a heating water outlet hole 122 formed at the upper other side, and direct water at the lower other side. An inlet hole 123 is formed, and a hot water outlet hole 124 is formed at an upper side. The edge portion of the heating water discharge guide portion 110c and the hot water discharge guide portion 100d is welded in close contact with the flat portion 120a of the flat plate 120, and the heating water discharge guide portion 110c and hot water The inner portion of the rim portion of the discharge guide portion 100d protrudes forward to form a discharge passage for heating water and hot water.

The first plate 130 stacked on the rear of the flat plate 120, a heating water inlet hole 131 is formed on one lower side, a heating water outlet hole 132 is formed on the other upper side, and on the lower other side A direct water inlet hole 133 is formed, and a hot water outlet hole 134 is formed at an upper side. And, the rim of the heating water inlet hole 131 and the heating water outlet hole 132 of the first plate 130 protrudes forward and the heating water inlet hole 121 and the heating water outlet hole of the flat plate 120 ( The boss portions 131a and 132a that are in close contact with the rim of 122 are formed, and a plurality of first beads 135 bent to one side are protruded toward the front in the flat portion 130a of the first plate 130, have.

The second plate 140 stacked on the rear of the first plate 130, a heating water inlet hole 141 is formed on one lower side, a heating water outlet hole 142 is formed on the other side, and the lower other A direct water inlet hole 143 is formed on the side, and a hot water outlet hole 144 is formed on the upper side. And, the rim of the direct water inlet hole 143 and the hot water outlet hole 144 of the second plate 140 protrudes forward and the direct water inlet hole 133 and the hot water outlet hole 134 of the first plate 130 The boss portions 143a and 144a that are in close contact with the rim are formed, and a plurality of second beads 145 bent in a direction opposite to the first bead 135 is formed on the flat portion 140a of the second plate 140. Is formed.

The heating water flow path P1 and the direct water flow path P2 are formed by the boss portions 131a and 132a formed on the first plate 130 and the boss portions 143a and 144a formed on the second plate 140, respectively. Each can be separated and formed alternately. That is, the flow of direct water is possible between the flat plate 120 and the first plate 130 by the boss portions 131a and 132a formed on the first plate 130, but the flow of heating water is blocked and the direct flow channel ( P2) is formed, and the flow of heating water is possible between the first plate 130 and the second plate 140 by the boss portions 143a and 144a formed on the second plate 140, but the flow of direct water is possible. The heating water flow path P1 is formed by being cut off.

Then, when the first plate 130 and the second plate 140 overlap, the first bead 135 formed on the first plate 130 and the second bead 145 formed on the second plate 140 The heat flow efficiency between the heating water and the direct water is improved by promoting turbulent flow in the flow of the fluid flowing through the overlapped gaps of.

The first plate 130 and the second plate 140 are alternately overlapping a plurality, the first flow path switching plate 150 stacked on the rear of the second plate (140-4) located at the rear side of the lower one side In the heating water inlet hole 151 is formed, the upper other side of the heating water outlet hole 152 is formed, the lower other side and the upper one side is made of a closed shape in the front and rear, the second plate (140-4) and the first In the direct flow path P2 between the flow path switching plates 150, the direct flow path is switched to face the front. In addition, a plurality of first beads 155 that are bent to one side and protrude forward are formed in the flat portion 150a of the first flow path switching plate 150.

The flat portion 160a of the second flow path switching plate 160 stacked at the rear of the first flow path switching plate 150 has a shape in which the entire area is blocked in the front and rear directions, and the first flow path switching plate 150 and the second In the heating water flow path P1 between the flow path switching plates 160, the flow path of the heating water is switched to face the front. In addition, a plurality of second beads 165 that are bent to the other side and protrude forward are formed in the flat portion 160a of the second flow path switching plate 160.

According to the configuration of the hot water heat exchanger 100 as described above, a plurality of stacked plates (110,120,130-1,140-1,130-2,140-2,130-3,140-3,130-4,140-4,150,160) inside the heating that communicates from the lower one side to the upper other side The water flow path P1 and the direct flow path P2 communicating from the lower side to the upper side are alternately formed, and the fluid flowing through the overlapped gap between the first beads 135 and 155 and the second beads 145 and 165. By promoting turbulent flow in the flow, it is possible to improve the heat exchange efficiency between the heating water and the direct water.

In addition, the front plate 110, the heating water that passes through the heating water flow path (P1) and discharges the heating water discharged to the heating water outlet hole 112 formed close to one side of the heating water inlet 111 By providing a discharge guide (110c), and a hot water discharge guide (110d) for directing the hot water discharged after passing through the direct water flow path (P2) to the hot water outlet hole 114 formed as close as possible to the direct water inlet (113) , The above-described heating water water piping module 200 and the direct/hot water piping module 300 may be configured to be easily detachable from the hot water heat exchanger 100.

In addition, by forming a close gap between the heating water inlet pipe (L6) and the heating water outlet pipe (L7) connected to the hot water heat exchanger 100, the heating water inlet pipe (L6) and the heating water outlet pipe (L7) ) Can be miniaturized the size of the heating water piping module 200 coupled to.

Likewise, the third direct water supply pipe (L11) and the first hot water supply pipe (L12) are formed by closely forming the gap between the third direct water supply pipe (L11) and the first hot water supply pipe (L12) connected to the hot water heat exchanger (100). The size of the direct water/hot water piping module 300 coupled to is also able to be miniaturized.

In this case, the heating water inlet hole 111 and the heating water outlet hole 112 are formed on one side of the hot water heat exchanger 100, and the direct water inlet hole 113 and the hot water outlet hole 114 are the heating water inlet. It is formed in a position spaced apart from the other side in the area where the ball 111 and the heating water outlet hole 112 are formed, and the heating water piping module 200 and the direct/hot water piping module 300 are a hot water heat exchanger 100. It can be coupled to both sides of.

Hereinafter, with reference to FIGS. 4 and 9, the flow path switching and bypass structure of the heating water provided in the heating water piping module 200 will be described in more detail.

The heating water piping module 200 is a heating water supply pipe (L2) connected to the lower side of the housing or the heating water connected to the other side of the housing, the flow path of the heating water flowing from the main water supply pipe (L1) connected to one side of the housing A three-way valve 210 for selectively switching to the inlet pipe L6 is provided, and a bypass pipe L8 communicates with a side wall of the housing located on one side of the three-way valve 210, and the bypass pipe ( A check valve 220 is provided in the pipeline of L8). In addition, the heating water piping module 200 is spaced on both sides of the lower portion of the housing to form a heating water supply pipe (L2) and a heating water return pipe (L3), and is spaced on both sides of the upper surface of the housing to introduce heating water. The pipe L6 and the heating water outlet pipe L7 are formed.

In this way, in the housing of the heating water piping module 200, a main water supply pipe (L1), a heating water supply pipe (L2), a heating water inlet pipe (L6), and a pipeline connected to the bypass pipe (L8) are integrated. Since it is formed, the structure of the water piping of the heating water can be compactly constructed, and the length of the pipeline of the water piping can be shortened compared to the structure in which the conventional water piping is individually installed, thereby reducing the pressure loss of the heating water and improving the thermal efficiency of the boiler. Can be improved.

Hereinafter, with reference to FIGS. 4 and 10 and 11, the direct water/hot water flow path and the mixing flow path of the direct water in the direct water/hot water water piping module 300 will be described in more detail.

The direct water/hot water water piping module 300, the direct water is introduced, the first direct water supply pipe (L9) connected to the inlet of the flow control valve 310, the outlet of the flow control valve 310 and the hot water heat exchanger ( The second direct water supply pipe (L10) and the third direct water supply pipe (L11) connected to the direct water inlet (113) of the 100), the first hot water supply pipe (L12) and the second hot water through which the hot water heat exchanger (100) is supplied A hot water supply pipe (L13), a connection portion between the second direct water supply pipe (L10) and a third direct water supply pipe (L11), and a first direct water mixing pipe (L14) connected to the inlet of the mixing valve 320, and the first hot water supply pipe (L12) and the connection portion of the second hot water supply pipe (L13) and the second direct mixing pipe (L15) connected to the outlet of the mixing valve 320 may be provided as an integrated water pipe module.

In the direct/hot water piping module 300, a flow rate control valve 310 and a mixing valve 320 are provided on both upper sides, and a first direct water supply pipe L9 and a second hot water supply pipe L13 are provided on both lower sides. It is provided, the third direct water supply pipe (L11) and the first hot water supply pipe (L12) is provided in a diagonal position on the lower and upper parts of the back. In addition, since the second direct water supply pipe L10, the first direct mixing pipe 14, and the second direct mixing pipe L15 are interconnected and bent to the direct water/hot water piping module 300, they are bent and combined in an integral structure, Compared to the conventional structure in which water pipes through which direct water and hot water flow are individually installed, the length of the pipeline of the direct water/hot water water pipe can be shortened to make it compact, and the heat loss of hot water passing through the water pipe can be minimized. Stable hot water supply is possible. In addition, the direct water / hot water piping module 300 is formed with a water replenishing pipe (L16) on one side of the first direct water supply pipe (L9), the water piping structure for replenishing water in the event of insufficient heating water, also direct / hot water The piping module 300 may be integrally formed.

Hereinafter, with reference to FIGS. 12 to 14, the heating mode and the hot water mode of the boiler and the flow path of the heating water and the hot water when overpressure occurs will be described.

Referring to FIG. 12, in the heating 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 flows into the heating water. It is closed to the pipe (L6) side and is set to be opened to the heating water supply pipe (L2) side, and the heating water via the three-way valve 210 is supplied to the heating element along the heating water supply pipe (L2). The heating water that has transferred heat through the heating requirements flows into the expansion tank 10 through the heating water return pipe L3, and the heating water stored in the expansion tank 10 is heated by the operation of the circulation pump 20 It is supplied to the main heat exchanger 30 along the water circulation inlet pipe L4 and the heating water circulation outlet pipe L5, and then heated to circulate.

Referring to Figure 13, in the hot water mode, the heating water heated in the main heat exchanger 30 is supplied to the three-way valve 210 side along the main heating water supply pipe (L1), in this case the three-way valve 210 is the heating water supply pipe (L2) is closed to the side and is set to be open to the heating water inlet pipe (L6) side, the heating water via the three-way valve 210 is supplied to the hot water heat exchanger 100 along the heating water inlet pipe (L6). The heating water that has transferred heat to the direct water from the hot water heat exchanger (100) flows into the expansion tank (10) along the heating water outlet 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 inlet pipe (L4) and the heating water circulation outlet pipe (L5) by the operation of the circulation pump 20 to be circulated after being heated.

At the same time, the direct water flowing through the first direct water supply pipe (L9) is supplied to the hot water heat exchanger (100) through the second to third direct water supply pipes (L10, L11) through the flow control valve 310, and the hot water heat exchanger The hot water heated by receiving the heat of the heating water via the (100) is supplied to the hot water requirements through the first to second hot water supply pipes (L12, L13).

In the hot water mode, the opening amount of the flow control valve 310 and the mixing valve 320 is adjusted so that the temperature of the hot water supplied to the user reaches a set target hot water temperature, and selectively providing a heat source to the main heat exchanger 30 The burn amount of the burner 31 can be controlled.

Referring to FIG. 14, the heating water supply pipe L2 connected from the three-way valve 210 to the heating element in the heating mode is closed, or the heating water connected from the three-way valve 210 to the hot water heat exchanger 100 in the hot water mode. When the inflow pipe L6 is closed and an overpressure occurs in the heating pipe, the check valve 220 provided in the pipe of the bypass pipe L8 is opened, and the three-way valve 210 is supplied through the heating water main supply pipe L1. ) Is supplied to the expansion tank 10 through the bypass pipe (L8) and the heating water return pipe (L3) to release the overpressure generated in the heating pipe. Therefore, it is possible to improve durability by preventing damage to other components including the circulation pump 20 caused when overpressure occurs in the heating pipe.

In the present specification, the case where heat exchange between heating water and direct water is performed in the hot water heat exchanger 100 is exemplified, but in another embodiment, the hot water heat exchanger 100 may be applied even when heat exchange between two different fluids other than water is made. In addition, as a configuration that replaces the hot water heat exchanger 100, an instantaneous water heater that generates hot water by directly supplying a heat source to direct water may be applied.

As described above, the present invention is not limited to the above-described embodiment, and a modified implementation obvious by a person skilled in the art to which the present invention pertains without departing from the technical spirit of the present invention claimed in the claims It is possible, and such modifications are within the scope of the present invention.

10: expansion tank 20: circulation pump
30: main heat exchanger 100: hot water heat exchanger
110: front plate
110a,120a,130a,140a,150a,160a: Flat part
110b,120b,130b,140b,150b,160b: Flange part
110c: Heating water discharge guide part 110d: Hot water discharge guide part
111,121,131,141,151: Heating water inlet
131a,132a,143a,144a,151a,161a: Boss part
112,122,132,142,152: Heating water outlet
113,123,133,143: Direct water inlet 114,124,134,144: Hot water outlet
120: flat plate 130: first plate
135,155: 1st bead 145,165: 2nd bead
140: second plate 150: first flow path conversion plate
160: second flow path switching plate 200: heating water piping module
210: three-way valve 220: check valve
300: direct/hot water piping module 310: flow control valve
320: mixing valve 330: supplemental water valve
400: control unit 410: mode and temperature setting unit
L1: Heating water supply pipe L2: Heating water supply pipe
L3: Heating water return pipe L4: Heating water circulation inflow pipe
L5: Heating water circulation flow pipe L6: Heating water inflow pipe
L7: Heating water outlet pipe L8: Bypass pipe
L9: First direct supply pipe L10: Second direct supply pipe
L11: 3rd direct water supply pipe L12: 1st hot water supply pipe
L13: 2nd hot water supply pipe L14: 1st direct mixing pipe
L15: second direct mixing tube L16: water replenishment tube
P1: Heating water flow path P2: Direct water flow path
S1: 1st temperature sensor S2: 2nd temperature sensor
S3: Third temperature sensor S4: Fourth temperature sensor

Claims (15)

Equipped with a main heat exchanger (30) for heating the heating water by the combustion heat of the burner (31), and a hot water heat exchanger (100) for supplying hot water by heat exchange between heating water and direct water heated in the main heat exchanger (30) In the boiler,
Flow rate control valve 310 is provided on the direct water supply pipe to supply the direct water to the hot water supply heat exchanger (100) to control the supply flow rate of direct water, and branched from the direct water supply pipe to the heating water in the hot water supply heat exchanger (100) It is provided in a direct water mixing pipe connected to a direct water supply pipe to which hot water heated by heat exchange is supplied, and has a mixing valve 320 for mixing direct water with hot water passing through the hot water heat exchanger 100, and the hot water heat exchanger ( A boiler capable of supplying hot water stably through a direct water/hot water piping module 300 that provides a direct water passage through 100) and a flow passage of hot water and a direct flow channel mixed with the hot water. According to claim 1,
A first temperature sensor (S1) for detecting the temperature of the direct water supplied to the hot water heat exchanger (100), a second temperature sensor (S2) for detecting the hot water temperature immediately after passing through the hot water heat exchanger (100) , And a third temperature sensor (S3) for detecting the temperature of the hot water after the direct water is mixed with the hot water passing through the hot water heat exchanger (100);
Based on the temperature information detected by the first temperature sensor (S1), the second temperature sensor (S2) and the third temperature sensor (S3), the hot water temperature detected by the third temperature sensor (S3) by the user A control unit 400 for controlling the opening amount of the flow control valve 310 and the mixing valve 320 to reach a set target hot water temperature;
A boiler capable of supplying stable hot water further comprising a. According to claim 2,
Further comprising a fourth temperature sensor (S4) for detecting the temperature of the heating water passing through the hot water heat exchanger (100),
The control unit 400 is based on the temperature of the heating water detected by the fourth temperature sensor (S4), so that the hot water temperature detected by the third temperature sensor (S3) reaches the target hot water temperature set by the user Boiler capable of stable hot water supply, characterized in that to control the amount of combustion of the burner (31). According to claim 1,
The direct water/hot water water piping module 300, the direct water is introduced, the first direct water supply pipe (L9) connected to the inlet of the flow control valve 310, the outlet of the flow control valve 310 and the hot water heat exchanger ( The second direct water supply pipe (L10) and the third direct water supply pipe (L11) connected to the direct water inlet of 100), the first hot water supply pipe (L12) and the second hot water supply pipe through which the hot water passed through the hot water heat exchanger (100) are supplied ( L13), the second direct water supply pipe (L10) and the third direct water supply pipe (L11) and the first direct mixing pipe (L14) connected to the inlet of the mixing valve 320, and the first hot water supply pipe (L12) And a second direct water mixing pipe (L15) connected to the outlet of the second hot water supply pipe (L13) and the outlet of the mixing valve (320) as an integrated water piping module. According to claim 1,
To supply the heating water heated in the main heat exchanger (30) to the heating water supply pipe (L2) connected to the heating demand side, or selectively to the heating water inlet pipe (L6) connected to the hot water heat exchanger (100) side Three-way valve 210 for switching the flow path of the heating water;
It provides a separate flow path from the heating water supply pipe (L2) and the heating water inlet pipe (L6) and is formed on one side of the three-way valve 210 to connect the heating element and the main heat exchanger (30). A bypass pipe (L8) connected to the heating water return pipe (L3);
When the overheating occurs because the heating water supply pipe (L2) or the heating water inlet pipe (L6) is closed, provided in the pipeline of the bypass pipe (L8), the heating water return pipe from the three-way valve 210 A check valve 220 that allows the flow of fluid only in one direction toward (L3); And
The three-way valve 210 and the bypass pipe (L8) and the check valve 220 are integrally provided therein, and the heating water supplied from the main heat exchanger 30 passes through the heating element or the hot water heat exchanger 100. A heating water supply pipe module 200 for providing a flow path that is returned by the flow path and a flow path that is returned through the bypass pipe L8;
A boiler capable of supplying stable hot water further comprising a. The method of claim 5,
When the heating water supply pipe (L2) connected to the heating request side, or the heating water inlet pipe (L6) connected to the hot water heat exchanger (100) side is closed, when overpressure occurs,
The heating water heated in the main heat exchanger (30) is supplied to the three-way valve (210), and then flows into the bypass pipe (L8) communicating with one side of the three-way valve (210), so that the check valve (220) After passing through ), it flows into the expansion tank 10, and the heating water stored in the expansion tank 10 circulates to the main heat exchanger 30 by the circulation pump 20, thereby generating overpressure in the heating pipe. Boiler capable of providing stable hot water, which is characterized by being prevented. The method of claim 5,
In the hot water heat exchanger 100, a plurality of plates are stacked so that heating water and direct water flow alternately in each layer, and the heating water flow path P1 and the direct water flow path P2 are separated from each other so that heat exchange is performed. Formed,
Among the plurality of plates, the front plate 110 located at the front side is heated by being introduced into the heating water inlet pipe L6 formed on a lower side of the front plate 110 and discharged after passing through the heating water flow path P1. A heating water discharge guide part 110c forming a flow path of the heating water so that the water outlet pipe L7 is located close to the heating water inlet pipe L6, and a direct water supply pipe formed on the lower other side of the front plate 110 A hot water discharge guide portion 110d is formed to form a flow path of hot water so that the hot water supply pipe L12 that flows into the L11 and is discharged after passing through the direct water flow path P2 is located close to the direct water supply pipe L11. Boiler capable of providing stable hot water. The method of claim 7,
One side of the heating water piping module 200 is assembled so that the heating water inlet pipe (L6) and the heating water outlet pipe (L7) of the hot water heat exchanger (100) are detachable,
A boiler capable of supplying stable hot water, characterized in that the direct water supply pipe (L11) and the hot water supply pipe (L12) of the hot water heat exchanger (100) are assembled at one side of the direct water/hot water water pipe module (300). The method of claim 8,
On the lower side of the front plate 110, a heating water inlet hole 111 connected to the heating water inlet pipe L6 is formed,
A heating water outlet hole 112 connected to the heating water outlet pipe L7 is formed at one side of the heating water inlet hole 111,
The heating water discharge guide part 110c is capable of providing stable hot water, characterized in that the heating water discharged forward toward the upper other side of the front plate 110 is guided to the heating water outlet hole 112. Boiler. The method of claim 9,
On the other lower side of the front plate 110, a direct water inlet hole 113 connected to the direct water supply pipe L11 is formed,
A hot water outlet hole 114 connected to the hot water supply pipe L12 in a position close to the direct water inlet hole 113 in an area where the heating water discharge guide part 110c is not formed at an upper portion of the front plate 110. Is formed,
The hot water discharge guide part 110d is a boiler capable of supplying hot water stably, characterized in that it is formed to guide hot water discharged forward toward the upper side of the front plate 110 to the hot water outlet hole 114. The method of claim 10,
At the rear of the front plate 110, a heating water inlet hole 121 is formed at one lower side, a heating water outlet hole 122 is formed at the other upper side, and a direct water inlet hole 123 is formed at the lower other side. , Plate plate 120 is formed with a hot water outlet hole 124 is laminated on the upper side,
The edge portion of the heating water discharge guide portion 110c and the hot water discharge guide portion 100d is in close contact with the flat plate 120, and the inside portion of the edge portion protrudes forward to form a discharge flow path of heating water and hot water. Boiler capable of providing stable hot water. The method of claim 11,
A plurality of first plates 130 and a second formed at the rear of the flat plate 120 so that the boss portion positioned in the diagonal direction crosses the front and rear so that the heating water flow path P1 and the direct water flow path P2 are alternately formed. Plates 140 are alternately stacked,
The first plate 130 and the second plate 140 are formed with a plurality of first beads 135 and second beads 145 bent in opposite directions, and the first beads 135 and the second Boiler capable of stable hot water supply, characterized in that configured to allow fluid flow through the overlapped gap of the bead (145). The method of claim 12,
At the rear of the second plate 140 stacked at the rearmost side, the first flow path switching plate 150 for switching the direct flow path from the rear toward the front, and the flow path of the heating water from the rear to the front. Boiler capable of providing stable hot water, characterized in that the second flow path switching plate (160) for conversion is sequentially stacked. The method of claim 13,
In the first flow path conversion plate 150, a heating water inflow hole 151 is formed at one lower side, and a heating water outlet hole 152 is formed at the other upper side, and the lower other side and the upper one side are blocked in the front-rear direction. Done,
The second flow path switching plate 150, a boiler capable of providing a stable hot water, characterized in that the entire area is formed in a shape blocked in the front and rear. According to claim 1,
The direct water/hot water water piping module 300 is provided in a water supply pipe (L16) for replenishing heating water by receiving direct water when there is a shortage of heating water, and a flow of direct water provided in a pipeline of the water supply pipe (L16) Boiler capable of stable hot water supply, characterized in that provided with a supplemental water valve (330) to control.

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