KR20210156801A - Auxiliary hot water heating apparatus - Google Patents

Abstract

Disclosed is an auxiliary hot water heating apparatus which allows energy-saving operation of a hot water heating system. The auxiliary hot water heating apparatus is applied to a heat water heating system heating a heating zone by moving hot water from a hot water supply source to a heating line through a water supply line and returning hot water passing through the heating line to the hot water supply source through a water return line, and comprises: a water supply pipe making up a portion of the water supply line; a water return pipe making up a portion of the water return line; a water tank connected to and installed on the water return pipe to store returned hot water; a bypass pipe forming a hot water passage from the water return pipe to the water supply pipe; a water-return-side three-way valve unit installed to selectively move hot water through the water return line or through the water return pipe and the bypass pipe; a water-supply-side three-way valve unit installed to selectively move hot water through the water supply line or through the water supply pipe and the bypass pipe, and forming a circulation flow path passing through the water supply pipe, the heating line, the water return pipe, and the bypass pipe in cooperation with the water-return-side three-way valve unit; a pump moving hot water along the circulation flow path; and a heating unit heating hot water in the bypass pipe.

Description

Auxiliary hot water heating apparatus

The present invention relates to an auxiliary hot water heating device, and more particularly, by being installed in a hot water heating system using a hot water supply source and performing heating instead of the hot water supply source when the heating load is small, energy saving operation of the hot water heating system is possible It relates to an auxiliary hot water heating system that makes

The heating system used in multi-family houses such as apartments, buildings, multi-family houses, or single-family houses includes individual heating, which heats water using an independently installed boiler, and heating water using a separately installed external heat source. It can be divided into group heating in which heating is performed and then using it. In addition, group heating can be further divided into central heating using a heat source such as a central boiler, and district heating using a heat source such as an external regional power plant.

In the case of district heating, which is widely applied to heating apartment houses, etc., the heat energy produced in the heat production facility (primary side) is supplied through the heat transport facility, and the hot water required for heating is produced through the heat exchanger. Heated hot water is supplied to each household in the apartment building using a pump. And the hot water supplied to each household transfers heat energy to each household, cools, and then returns to the heat exchanger through the return line to repeat the heating process.

In various hot water heating methods, an automatic control heating system is generally applied to each household. The automatic control heating system is an energy-saving heating system that can separately control the indoor temperature of each heating zone by installing a separate temperature controller for each heating zone in the household. In the automatic control heating system, heating lines are buried in each heating zone, and when heating is not required, the valve of the heating line is closed to prevent unnecessary energy wastage and reduce fuel costs. In addition, if the target temperature of the heating zone is set, hot water is automatically supplied from the hot water supply so that the heating zone can be maintained at the set temperature.

However, in general, the hot water supply source for supplying hot water to each household has a high capacity and consumes a lot of energy. Therefore, even under a heating condition in which the heating load is not large, a high-capacity hot water supply is operated to supply hot water, so there is a problem in that unnecessary energy is wasted.

Registered Patent Publication No. 1099779 (2011. 12. 28.)

The present invention has been devised in view of the foregoing, and provides an auxiliary hot water heating device that enables energy-saving operation of a hot water heating system by performing heating instead of a hot water supply source when the heating load is relatively small. aim to do

Objects of the present invention are not limited to those described above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

Auxiliary hot water heating device according to the present invention for achieving the object as described above, heats the heating zone by flowing hot water from a hot water supply source to a heating line through a water supply line, and the hot water passing through the heating line through a return line An auxiliary hot water heating device applied to a hot water heating system that returns to a hot water supply source, comprising: a water supply pipe forming a part of the water supply line; a water exchange pipe forming a part of the return line; a water tank connected to the water exchange pipe and installed to store hot water exchanged; a bypass pipe for forming a hot water passage from the return pipe to the water supply pipe; a return-side three-way valve unit installed so that the flow of hot water through the return line or the flow of hot water through the return pipe and the bypass pipe can be selectively made; It is installed so that the flow of hot water through the water supply line or the flow of hot water through the water supply pipe and the bypass pipe can be selectively made, and in cooperation with the return-side three-way valve unit, the water supply pipe, the heating line, the return pipe, and the a water supply side three-way valve unit forming a circulation passage passing through a bypass pipe; a pump for flowing hot water along the circulation passage; and a heating unit configured to heat the hot water in the water tank or the bypass pipe.

A water supply temperature sensor may be installed in the water supply pipe, and a return water temperature sensor may be installed in the return pipe.

A level sensor may be installed in the water tank.

The return-side three-way valve unit includes a return-side three-way valve and a return-side valve actuator for operating the return-side three-way valve, wherein the return-side three-way valve includes a return-side valve housing and a return water installed inside the return-side valve housing A side flow path switching member is included, and a 3-way flow path is formed inside the return-side valve housing, a return water discharge side, a return water inlet side, and a bypass pipe side, and the return-side flow path switching member is the three-way flow path. It includes three passages corresponding to, but the return-side flow path switching member is rotated to block the one-way flow path among the three-way flow path and can be opened so that the two-way flow path is communicated.

The water supply side three-way valve unit includes a water supply side three-way valve and a water supply side valve actuator for operating the water supply side three-way valve, and the water supply side three-way valve includes a water supply side valve housing and a water supply installed inside the water supply side valve housing A side flow path switching member is included, and a three-way flow path is formed inside the water supply side valve housing to be open to a water inlet side, a water discharge side, and a bypass pipe side, and the water supply side flow path switching member is the three-way flow path. It includes three passages corresponding to , but the water supply-side flow path switching member rotates to block one-way flow paths among the three-way flow paths and open so that the two-way flow paths communicate with each other.

In addition, the auxiliary hot water heating device according to the present invention further includes a control unit for controlling the return-side three-way valve unit, the water supply-side three-way valve unit, the pump and the heating unit.

In addition, the auxiliary hot water heating apparatus according to the present invention may further include a mode operation unit for applying an input signal to the control unit, and a display unit for displaying heating operation information.

The control unit controls the return-side three-way valve unit, the water-supply-side three-way valve unit, the pump and the heating unit to operate the hot water heating system in any one of a water supply heating operation mode and a circulation heating operation mode. can

The control unit compares the current heating load with the reference heating load, and when the current heating load is greater than the reference heating load, the hot water is heated by circulating the hot water supply source, the water supply line, the heating line, the return line and the hot water supply source. Circulation heating in which the hot water heating system is controlled to operate in a water supply heating mode for heating the zone, and when the current heating load is less than or equal to the reference heating load, the hot water is heated by the heating unit and circulates through the circulation passage to heat the heating zone It is possible to control the hot water heating system to operate in a mode.

The control unit controls the hot water heating system to be switched to a hot water replenishment mode for replenishing hot water when the hot water circulating in the circulation passage is insufficient while the hot water heating system is operated in the circulation heating mode, and replenishing the hot water In the mode, the operation of the pump and the heating unit is stopped, and the return-side three-way valve unit can be controlled so that hot water flows through the return line and the flow of hot water through the return pipe and the bypass pipe is blocked.

In the case of the auxiliary hot water heating device according to the present invention as described above, when the heating load is small, the existing hot water heating system that can be operated only in the water heating operation mode for heating the heating zone with the hot water supplied from the hot water supply source is supplemented. By heating the heating zone(s) in the circulation heating operation mode instead of the hot water supply source, energy-saving operation is possible and operation costs can be reduced.

Effects of the present invention are not limited to those described above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a block diagram schematically showing a hot water heating system to which an auxiliary hot water heating device according to an embodiment of the present invention is applied.
FIG. 2 is an enlarged view of a portion of FIG. 1 .
3 is a view showing a partial configuration of the hot water heating system shown in FIGS. 1 and 2 .
4 is a perspective view showing an auxiliary hot water heating device according to an embodiment of the present invention.
5 is an exploded perspective view showing the cover removed to see the inside of the auxiliary hot water heating device shown in FIG.
6 is an enlarged perspective view of the auxiliary hot water heating device with the cover removed.
FIG. 7 is a plan view illustrating the auxiliary water heating apparatus shown in FIG. 6 in a state in which the auxiliary heating apparatus control unit and the display unit are removed.
8 is a partially cut-away perspective view for explaining the main parts provided in the auxiliary hot water heating device according to an embodiment of the present invention.
9 is a plan view for explaining main parts provided in the auxiliary hot water heating device according to an embodiment of the present invention, and is a plan view showing three-way valve units and a part of the heater cut off.
10 is an exploded perspective view showing the return-side three-way valve unit of the auxiliary hot water heater shown in FIGS. 1 to 9 .
11 is an exploded perspective view showing the water supply side three-way valve unit of the auxiliary hot water heater shown in FIGS. 1 to 9 .
12 to 15 are views for explaining various embodiments of a method for controlling a hot water heating system.
16 is a view for explaining a hot water heating system in which an auxiliary hot water heating device is connected to a heating line according to another embodiment of the present invention.
17 is a view for explaining a control method of the heating system shown in FIG. 16 .
18 and 19 are views showing other embodiments of the auxiliary water heater.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

In describing the present invention, the size or shape of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation.

In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms should be interpreted as meanings and concepts consistent with the technical spirit of the present invention based on the contents throughout this specification.

In order to clearly explain the present invention, the description of parts not related to the technical idea of the present invention is omitted, and the same reference numerals are given to the same or similar elements throughout the specification.

In addition, in various embodiments, components having the same configuration will be described using the same reference numerals only in the representative embodiment, and only configurations different from the representative embodiment will be described in other embodiments.

Throughout the specification, when a part is "connected" to another part, it includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. In addition, when a part "includes" a certain component, this may mean further including other components rather than excluding other components unless otherwise stated.

The auxiliary hot water heating device according to the present invention may be applied to a hot water heating system. Hereinafter, the auxiliary hot water heating device according to the present invention will be described as an example applied to the hot water heating system.

1 to 11 , the hot water heating system to which the auxiliary hot water heating device according to the present invention is applied has a hot water supply source 110 , a water supply line 112 , a water supply header 114 , and a heating line 116 . ), and a return header 118 , a return line 120 , an auxiliary hot water heating device 1 , and a system control unit 180 .

As will be described in detail below, the auxiliary water heater 1 is a water supply pipe 112B, a return pipe 120B, a water tank 133, a water supply side three-way valve unit 135, a return side three-way valve unit 150, a pump 172 and a heating unit 170, and a housing for accommodating them.

This hot water heating system flows the hot water supplied from the hot water supply source 110 to the heating line 116 to heat the heating zone 20 in which the heating line 116 is installed. It is possible to selectively operate in one of the circulation heating operation heating modes in which the passing hot water is heated and circulated by the auxiliary hot water heating device 1 and re-supplied to the heating line 116 .

Hereinafter, the hot water heating system will be described as an example applied to an apartment house including a plurality of households 10 . Each household 10 includes a water supply line 112 , a water supply header 114 , a heating line 116 , a return header 118 , a return line 120 , and an auxiliary hot water heating device 1 and a system. A control unit 180 may be provided to configure household heating equipment. And one hot water supply source 110 may be installed to supply hot water to a plurality of households (10). The heating zone 20 of each household 10 may be provided in plurality.

The water supply line 112 may be connected to the hot water supply source 110 to introduce hot water supplied from the hot water supply source 110 to each household 10 . A calorimeter 122 for measuring the calorific value or temperature of the hot water supplied into the household 10 may be installed in the water supply line 112 . In addition, a water supply temperature sensor 124 for measuring the temperature of the hot water supplied through the water supply line 112 is installed on the upstream side of the water supply header 114 of the water supply line 112 .

In this embodiment, the water supply line 112 is an external water supply line 112A on the upstream side connected from the hot water supply source 110 to the water supply inlet port of the auxiliary hot water heating device 1, and the auxiliary water heating device 1 . A water supply pipe located between the internal water supply line 112C on the downstream side from the discharge port to the water supply header 114, and the external water supply line 112A and the internal water supply line 112C and included as a part in the auxiliary water heater 1 (112B).

As will be described below, the water supply side three-way valve unit 135 may be installed at the connection position of the water supply pipe 112B and the internal water supply line 112C, and the water supply side three-way valve included in the water supply side three-way valve unit 135 A portion of 136 may constitute the aforementioned water supply outlet port.

In this embodiment, the water supply temperature sensor 124 is installed in the water supply outlet port to which the water supply pipe 112B and the internal water supply line 112C are connected, but the installation position of the water supply temperature sensor 124 is not limited thereto, and the heating line ( 116) can be changed to various locations that can measure the supply temperature of the hot water supplied. The temperature of the hot water supplied to the heating line 116 may be measured through the calorimeter 122 or the water supply temperature sensor 124 and provided to the auxiliary heating device control unit 101 or the system control unit 180 .

The water supply header 114 distributes the hot water supplied through the water supply line 112 to the plurality of heating lines 116 .

A plurality of heating lines 116 are buried in each heating zone 20 so as to supply hot water to a plurality of heating zones 20 provided in each household 10 , and the hot water flows through the heating line 116 . Heating is made for the heating zone 20 . Here, the heating zone 20 may be a room, a living room, a kitchen, etc. provided in a household, and the size may be different. In addition, the length of the heating line 116 buried in each heating zone 20 and the flow rate of hot water supplied to each heating zone 20 may be designed differently according to the size of the heating zone 20 .

An indoor temperature sensor 126 for measuring an indoor temperature of the heating zone 20 is installed in the heating zone 20 . The indoor temperature sensor 126 measures the indoor temperature of the heating zone 20 and provides the measurement information to the auxiliary heating device controller 101 or the system controller 180 .

A floor temperature sensor 127 for measuring the floor temperature of the heating zone 20 may be further installed on the floor of the heating zone 20 . The floor temperature sensor 127 measures the floor temperature, unlike the indoor temperature sensor 126 which measures the temperature of the indoor air. The floor temperature sensor 127 is installed in a form embedded in the floor of the heating zone 20 or configured to measure the floor temperature of the heating zone 20 by an infrared imaging method of irradiating infrared rays toward the floor from a ceiling or the like. The floor temperature sensor 127 measures the floor temperature of the heating zone 20 and provides the measurement information to the auxiliary heating device controller 101 or the system controller 180 .

The water supply control valve 128 is connected to the upstream side of the heating line 116 , more specifically, to the heating line 116 between the water supply header 114 and the heating zone 20 . A user may control the flow of hot water through the heating line 116 by manipulating the water supply control valve 128 , or may adjust the flow rate of hot water supplied to the heating line 116 .

The return header 118 collects the hot water that has passed through the plurality of heating lines 116 and discharges them to the return line 120 .

In this embodiment, the return line 120 is an internal return line 120A connected from the return header 118 to the return water inlet port of the auxiliary hot water heater 1, and from the return water outlet port of the auxiliary hot water heater 1 It is located between the external return line 120C and the internal return line 120A and the external return line 120C connected to the hot water supply source 110, and includes a return pipe 120B included as a part of the auxiliary hot water heater 1 do. As described below, the return-side three-way valve unit 150 may be installed at the connection position of the return pipe 120B and the external return line 120C, and the return-side three-way included in the return-side three-way valve unit 150 A part of the valve 151 may constitute the aforementioned return water discharge port.

The water tank 133 serves to store the returned hot water in order to heat the returned hot water and circulate it again. The water tank 133 contributes to secure a sufficient flow rate of hot water to exchange heat in the heating line 116 while rotating the circulation path including one or more heating lines 116 in the circulation heating operation mode, which will be described in detail below.

A level sensor (not shown) may be installed in the water tank 133 . The level sensor is provided to measure the water level of the hot water in the water tank. The level sensor measures the water level of the hot water in the water tank, and provides the measurement information to the auxiliary heating device control unit 101 or the system control unit 180 .

A return control valve 130 is installed on the downstream side of the heating line 116 , more specifically, on the heating line 116 between the heating zone 20 and the return header 118 .

A return temperature sensor 132 for measuring the temperature of the hot water returned through the return line 120 is installed on the downstream side of the return header 118 of the return line 120 . In this embodiment, the return temperature sensor 132 is installed in the return water inlet port to which the internal return line 120A and the return pipe 120B are connected, but the installation position of the return water temperature sensor 132 is not limited thereto, and the hot water supply source ( 110) can be changed to various locations that can measure the temperature of the returned hot water. In addition, the return temperature sensor 132 is installed between the heating line 116 that has passed through the heating zone 20 and the return control valve 130 to pass through the heating line 116 and is returned to the hot water supply source 110 . It may be installed to measure the temperature of hot water. The temperature of the hot water returned to the hot water supply source 110 may be measured through the return temperature sensor 132 and provided to the auxiliary heating device controller 101 or the system controller 180 .

As used herein, the term “water supply line” refers to a hot water path from a hot water supply source to just before the heating line 116, and all elements included in the path are part of the water supply line. For example, the water supply pipe and a part of the water supply side three-way valve are a part of the water supply line, and each of these elements is included as a part of the water supply line and as a part of the auxiliary hot water heater and the water supply side three-way valve unit at the same time.

As used herein, the "return line" refers to a hot water path from the end of the heating line to the hot water supply source, and all elements included in the path are part of the return line. For example, the return pipe and a part of the return-side three-way valve are part of the return line, and each of these elements is included as a part of the return line and as a part of the auxiliary hot water heating device and the return-side three-way valve unit at the same time.

As will be described below, the auxiliary hot water heating device 1 is installed across the water supply line 112 and the return line 120 , and the hot water returned through the return line 120 is transferred to the water tank 133 or the following description. It is configured to be heated by the heating unit 170 in the bypass pipe 171 to be re-supplied to the heating line 116 through the water supply line 112 .

The return water control valve 130 serves to control the flow rate of hot water flowing through the heating line 116 . The return water control valve 130 is controlled by the system control unit 180, and each heating zone 20 through the heating line 116 through the control of the opening degree of the heating line 116 flow path by the return water control valve 130. It is possible to control the flow rate of hot water supplied by

The return temperature sensor 132 measures the temperature of the hot water returned to the hot water supply source 110 through the heating zone 20 , and transmits the measurement information to the auxiliary heating device controller 101 or the system controller 180 . The return line 120 is connected to the return header 118 to return the hot water collected in the return header 118 to the hot water supply source 110 .

According to one embodiment of the present invention, the auxiliary hot water heating device (1) is a water supply pipe (112B), a return pipe (120B) and , a bypass pipe line 171 , a water supply side three-way valve unit 135 , a return side three-way valve unit 150 , a water tank 133 , a heating unit 170 , and a pump 172 . Water supply pipe (112B), return pipe (120B), bypass pipe line (171), water supply side three-way valve unit (135), return side three-way valve unit (150), water tank (133), heating unit (170) and pump (172) ) is mounted on the base 2 as a single module, and the cover 4 is coupled to the base 2 so as to cover them.

In addition, the auxiliary hot water heating device (1) is installed in the water supply line 120 and the water supply temperature sensor 124 for measuring the water supply temperature, and the return water temperature sensor ( 132).

In addition, the auxiliary hot water heating device (1) is a water supply side three-way valve unit 135 using the information obtained from the sensing means including the water supply temperature sensor 124, the return water temperature sensor 132, and a level sensor (not shown), The return side three-way valve unit 150, the heating unit 170, the auxiliary heating device control unit 101 for controlling the operation of the pump 172, etc. and the cover 4 outside while connected to the auxiliary heating device control unit 101 A wheel knob type mode operation unit 102 that is exposed and allows the user to directly input the mode of the auxiliary water heater 1, and information related to the control of the auxiliary water heater 1, for example, The display unit 103 further includes a display unit 103 for displaying various information such as water supply temperature, return water temperature, room temperature, floor temperature, the level of hot water in the water tank, and the flow rate of circulating hot water.

The auxiliary heating device controller 101 may be included as a part of the system controller 180, and may be provided to enable wired/wireless communication with the main controller 182 and the temperature controller 181, which are other parts of the system controller 180. . Of course, it is also possible for the auxiliary heating device control unit 101 to control the auxiliary hot water heating device 1 separately without interlocking with the system control unit 180 .

The water supply pipe 112B is a part of the water supply line 112 for supplying the hot water of the hot water supply source 110 to the water supply header 114 and the heating lines 116 branched therefrom, and the water supply side three-way valve unit 135 together with It connects between the external water supply line (112A) and the internal water supply line (112C). The return pipe 120B is a part of the return line 118 for returning the hot water used for heating the heating zone to the hot water supply source 110 from the heating line 116 and the return header 118 connected thereto, and the return side It connects between the internal return line 120A and the external return line 120C together with the three-way valve unit 150 .

The water tank 133 is installed in connection with the water exchange pipe 120B and serves to store the hot water exchanged through the water exchange pipe 120B. The bypass pipe line 171 cooperates with the water supply side three-way valve unit 135 and the return side three-way valve unit 150 to bypass the hot water returned in the circulation heating operation mode to the water supply line 112. do

The return-side three-way valve unit 150 is installed in the return pipe 120B of the return line 120 to selectively connect the bypass pipe 171 and the return pipe 120B, and in the circulation heating operation mode, the return line ( 120) to block the return of hot water to the hot water supply source 110 through the return line 120 by blocking the downstream side, and at the same time allow the hot water flow through the bypass pipe line 171, so that the returned hot water is transferred to the water supply line Divert the flow direction of the hot water so that it is fed back to the downstream side of 112 .

The water supply side three-way valve unit 135 is installed in the water supply pipe 112B of the water supply line 112 to selectively connect the bypass pipe line 171 and the water supply pipe 112B, and the water supply line 112 in the circulation heating operation mode. Blocks the upstream side of the hot water supply 110 to block the hot water supply through the water supply line 112, and at the same time, the hot water passing through the bypass pipe 171 passes through the water supply pipe 112B and the internal water supply line 112C. The flow direction of the hot water is changed to flow back to the water supply header 114 and the heating lines 116 separated therefrom.

The heating unit 170 heats the hot water re-supplied to the downstream side of the water supply line 112 through the bypass pipe 171 to increase the temperature of the hot water to a temperature usable for heating in the heating line 116 .

In the circulation heating operation mode, the return-side three-way valve unit 150 and the water-side three-way valve unit 135 operate, and the return pipe 120B, the bypass pipe 171, the water supply pipe 112B, and the internal water supply line 112C. , the heating line 116, the internal return line (120A), and again a circulation passage consisting of a return pipe (120B) is formed. In the circulation heating operation mode, the pump 172 connected to the circulation flow path, preferably the bypass pipe line 171, operates to circulate the hot water through the circulation flow path. At this time, since the hot water is heated by the heating unit 170 and always maintained above a certain temperature, heating of the heating zone 20 can be continuously performed.

As shown in FIG. 10 , the return-side three-way valve unit 150 is a return-side three-way valve 151 under the control of the return-side three-way valve 151 and the auxiliary heating device controller 101 or the system controller 180 . It includes a return-side valve actuator 160 for operating the. In addition, the return-side three-way valve unit 150 may further include a manual operation unit 161 for manually operating the return-side three-way valve 151 .

The return-side three-way valve 151 includes a return-side valve housing 152 , a return-side flow path switching member 153 installed inside the return-side valve housing 152 , and a return water connected to the return-side flow path switching member 153 . side valve stem 155 .

A flow path through which hot water can flow is provided inside the return valve housing 152 . The flow path inside the return-side valve housing 152 is formed as a three-way flow passage opened in three directions at intervals of approximately 90 degrees, the return water discharge side facing the hot water supply source 110, and the return water inflow toward the water tank 133 It is connected to the side and the bypass pipe 171 side. A return water discharge port connected to an external return line is formed on the return water discharge side of the return side valve housing 152 .

The return-side flow path switching member 153 is rotatably installed in the middle of the flow path inside the return-side valve housing 152 to change the flow direction of the hot water through the flow path. Three passages 154A, 154B, and 154C are provided in the return-side flow path switching member 153 .

These passages 154A, 154B, and 154C are spaced approximately 90 degrees apart. The return-side flow path switching member 153 changes the direction of each of the passages 154A, 154B, and 154C according to the rotation, and blocks one of the three-way flow paths of the return-side valve housing 152 and blocks the two-way flow path. By opening , it is possible to change the flow direction of the hot water in the return side valve housing 152 . That is, according to the rotational direction of the return-side flow path switching member 153 , the bypass pipe path 171 side flow path is blocked, and the return water inflow side facing the water tank 133 and the return water discharge side facing the hot water supply source 110 are connected. The hot water is returned to the hot water supply source 110 through the return line 120, or the return water discharge side is blocked and the return water inlet side and the bypass pipe line 171 side are connected, and the hot water returned through the bypass pipe line 171 It may be bypassed to the downstream side of the water supply line 112 .

The return-side valve stem 155 is placed in parallel with the central axis of rotation of the return-side flow path switching member 153 and is coupled to the return-side flow path switching member 153 . One end of the return-side valve stem 155 protrudes to the outside of the return-side valve housing 152 and is connected to the return-side valve actuator 160 .

The specific structure of the return-side three-way valve 151 is not limited to the one shown and may be variously changed.

The return-side valve actuator 160 is coupled to the return-side valve housing 152 to rotate the return-side flow path switching member 153 through the return-side valve stem 155 . The return-side valve actuator 160 is controlled by the auxiliary heating device controller 101 or the system controller 180 . As the auxiliary heating device control unit 101 or the system control unit 180 controls the return side valve actuator 160, the return side three-way valve 151 blocks the flow of hot water to the bypass pipe line 171 side, and the return header 118 . .

The return-side valve actuator 160 includes an actuator housing 166 , a driving unit 167 installed inside the actuator housing 166 , and a power transmission that transmits the driving force of the driving unit 167 to the return-side valve stem 155 . part 168 . As the driving force generated by the driving unit 167 is transmitted to the return-side valve stem 155 through the power transmission unit 168 , the return-side flow path switching member 153 may rotate. The driving unit 167 may include a motor 167A and a plurality of gear trains 167B. In addition, the upper part of the power cutting unit 168 is detachably exposed to the manual operation unit 161 exposed to the outside, and a person directly manipulates the valve stem 155 and the flow path switching member 153 connected thereto to rotate. can do it Reference numeral 162 denotes a clutch for selecting one of an automatic driving method by a return-side valve actuator and a manual operation by the manual operation unit 161 as a rotational driving method of the flow path switching member 153 .

11, the water supply side three-way valve unit 135 is a water supply side three-way valve 136, and the water supply side three-way valve 136 under the control of the auxiliary heating device control unit 101 or the system control unit 180. and a water supply side valve actuator 145 for operating the . In addition, the water supply-side three-way valve unit 135 may further include a manual operation unit 131 for manually operating the water supply-side three-way valve 136 .

The water supply side three-way valve 136 is connected to the water supply side valve housing 137, the water supply side flow path switching member 138 installed inside the water supply side valve housing 137, and the water supply side flow path switching member 138 and a water-side valve stem (140).

A flow path through which hot water can flow is provided inside the water supply side valve housing 137 . The flow path inside the water supply side valve housing 137 is formed as a three-way flow path opened in three directions at intervals of approximately 90 degrees, and the water inlet side facing the hot water supply source 110 and the water supply header 114 facing the water supply header 114 . It is connected to the discharge side and the bypass pipe line 171 side. In this embodiment, a water supply discharge port connected to the internal water supply line 112C is formed on the water supply discharge side of the water supply side valve housing 137 .

The water supply side flow path switching member 138 is rotatably installed in the middle of the flow path inside the water supply side valve housing 137 to change the flow direction of the hot water through the flow path. Three passages 139A, 139B, and 139C are provided in the water supply side flow path switching member 138 .

These passages 139A, 139B, and 139C are arranged at intervals of approximately 90 degrees. The water supply side flow path switching member 138 may change the direction of the flow of hot water in the water supply side valve housing 137 while changing the directions of the respective passages 139A, 139B, and 139C according to the rotation thereof. That is, according to the rotational direction of the water supply side flow path switching member 138, the bypass pipe line 171 side flow path is blocked, and the water supply discharge side facing the water supply header 114 and the water supply side facing the hot water supply source 110 are It is connected and hot water is supplied to the water supply header 114 through the water supply line 112, or the supply water inlet side is blocked and the water supply discharge side and the bypass pipe line 171 side are connected and the hot water introduced through the bypass pipe line 171 may be bypassed toward the water supply line 112 .

The water supply side valve stem 140 is placed in parallel with the central axis of rotation of the water supply side flow path switching member 138 and is coupled to the water supply side flow path switching member 138 . One end of the water supply side valve stem 140 protrudes to the outside of the water supply side valve housing 137 and is connected to the water supply side valve actuator 145 .

The specific structure of the water supply side three-way valve 136 is not limited to that shown and may be variously changed.

The water supply side valve actuator 145 is coupled to the water supply side valve housing 137 to rotate the water supply side flow path switching member 138 through the water supply side valve stem 140 . The water supply side valve actuator 145 is controlled by the auxiliary heating control unit 101 or the system control unit 180 . By controlling the auxiliary heating device control unit 101 or the system control unit 180 the water supply side valve actuator 145, the water supply side three-way valve 136 blocks the hot water flow through the bypass pipe 171 and the water supply line 112 ), or block the hot water flow through the water supply line 112 , and the hot water passing through the bypass pipe 171 may flow toward the water supply header 114 .

The water supply side valve actuator 145 includes the actuator housing 146 , the driving unit 147 installed inside the actuator housing 146 , and power transmission for transmitting the driving force of the driving unit 147 to the water supply side valve stem 140 . part 148 . As the driving force generated by the driving unit 147 is transmitted to the water supply side valve stem 140 through the power transmission unit 148 , the water supply side flow path switching member 138 may rotate. The driving unit 147 may include a motor 147A and a plurality of gear trains 147B. In addition, the upper portion of the power transmission unit 148 is detachably exposed to the manual operation unit 131 exposed to the outside, and a person directly manipulates the valve stem 140 and the flow path switching member 138 connected thereto. can be rotated Reference numeral 141 denotes a clutch for selecting one of an automatic driving method by a water supply side valve actuator and a manual operation by the manual operation unit 131 as a rotational driving method of the flow path switching member 128 .

In this embodiment, the heating unit 170 is installed in the bypass pipe line 171 connecting between the water supply side three-way valve unit 135 and the return side three-way valve unit 150 and flows through the bypass pipe line 171 . It may be made of a hot wire coil heater for heating hot water.

The pump 172 serves to forcibly flow the hot water stored in the water tank 133 to the bypass pipe 171 side through the internal return line 120A after passing through the water exchange header 118 . The pump 172 has an inlet connected to the return-side three-way valve 151 and an outlet connected to the bypass pipe 171, so that the hot water flowing into the return-side three-way valve 151 is pumped toward the bypass pipe 171. can do. The pump 172 is controlled by the auxiliary heating device control unit 101 or the system control unit 180 and does not operate when the hot water heating system is operated in the feed water heating operation mode, but can be operated only when it is operated in the circulation heating operation mode. .

The installation position of the pump 172 or the connection structure with the bypass pipe 171 is not limited to the illustrated one and may be variously changed.

The heating unit 170 heats the hot water passing through the bypass pipe 171 . As shown in FIG. 7 , the heating unit 170 may be formed of a hot wire coil heater wound around the outer periphery of the bypass pipe 171 . The heating unit 170 is controlled by the auxiliary heating device control unit 101 or the system control unit 180 and does not operate when the hot water heating system is operated in the water supply heating operation mode, but can be operated only when it is operated in the circulation heating operation mode. have.

The heating unit 170 has a variety of other structures that can apply heat to the hot water passing through the bypass pipe 171, such as a PTC heater, a thermoelectric element, a ceramic heater, a metal thin film heater, and a heat pump, in addition to the hot wire coil heater as shown. can take In addition, the heating unit 170 is installed in the water tank 133 instead of being installed in the bypass pipe 171 , so that the installation position can be changed so as to apply heat to the hot water stored in the water tank 133 .

The system control unit 180 includes a calorimeter 122, a water supply temperature sensor 124, an indoor temperature sensor 126, a floor temperature sensor 127, a return water temperature sensor 132, a level sensor (not shown), and the like. Receives the detection signal, and controls the water supply side three-way valve unit 135 , the return-side three-way valve unit 150 , the pump 172 , the heating unit 170 , and the like. The system controller 180 may include a temperature controller 181 installed in each heating zone 20 and a main controller 182 . In addition, the system control unit 180 may further include an auxiliary heating device control unit 101 provided in the auxiliary hot water heating device (1). The main controller 182 , the temperature controller 181 , and the auxiliary heating device controller 101 may be connected through wired/wireless communication.

The system controller 180 operates the hot water heating system in consideration of the target temperature set in the heating zone 20 , the indoor temperature of the heating zone 20 , the floor temperature of the heating zone 20 , the water supply temperature, the return water temperature, etc. The mode can be switched to a feed water heating operation mode or a circulation heating operation mode. Furthermore, when hot water is insufficient during the circulation heating operation, the system controller 180 may switch to the hot water replenishment mode to automatically fill the hot water in the hot water circulation passage.

Hereinafter, a method for controlling a hot water heating system according to an embodiment of the present invention will be described.

12 to 15 are flowcharts illustrating a control method of a hot water heating system to which an auxiliary hot water heating device according to the present invention is applied.

First, the control method of the hot water heating system shown in FIG. 12 includes a step (S11) of calculating the current heating load (Lp) of the heating zone 20 after the heating of the heating zone 20 is started (S11), and the current heating load Comparing (Lp) with a preset reference heating load (Lc) (S12) and operating the hot water heating system in the water heating operation mode according to the comparison result between the current heating load (Lp) and the reference heating load (Lc) Or, it includes the steps (S13) (S14) of operating in the circulation heating operation mode.

In the step S11 of calculating the current heating load Lp, the system controller 180 calculates the current heating load Lp required for heating the corresponding heating zone 20 under the heating conditions set by the user. In this case, the current heating load Lp is the target indoor temperature difference ΔTam calculated by the difference between the target indoor temperature of the heating zone 20 selected by the user and the current indoor temperature of the heating zone 20, and the heating zone selected by the user. The target floor temperature difference (ΔTfm) calculated by the difference between the target floor temperature of (20) and the current floor temperature of the heating zone (20), the water supply temperature (Tws) of the hot water supplied to the heating line (116), and the heating line (116) It may be the measured hot water temperature difference (ΔTwm) calculated by the difference of the return water temperature (Tws) of the hot water passing through.

In step S12 of comparing the current heating load Lp with the preset reference heating load Lc, the system controller 180 compares the calculated current heating load Lp with the reference heating load Lc. Here, the reference heating load (Lc) may be determined as an appropriate value less than the maximum heating load that can be solved by the auxiliary hot water heating device (1).

For example, when the target indoor temperature difference (ΔTam) is used as the current heating load (Lp), it is compared with the reference indoor temperature difference (ΔTac), which is the reference heating load (Lc), and the target floor temperature difference ( When ΔTfm) is used, it is compared with the reference floor temperature difference (ΔTfc), which is the reference heating load (Lc), and when the measured hot water temperature difference (ΔTwm) is used as the current heating load (Lp), the reference heating load (Lc) ) is compared with the reference hot water temperature difference (ΔTwc).

When the current heating load (Lp) is greater than the reference heating load (Lc), it is considered difficult to supply enough hot water to heat the corresponding heating zone 20 with the auxiliary hot water heating device 1 according to the current heating conditions. can Therefore, when the current heating load (Lp) is greater than the reference heating load (Lc), the system controller 180 operates the hot water heating system in the water heating operation mode (S13). At this time, the system control unit 180 controls the water supply side three-way valve unit 135 and the return side three-way valve unit 150 so that the flow of hot water through the bypass pipe 171 is blocked, and is supplied from the hot water supply source 110 . The hot water that becomes the water supply line 112, the water supply header 114, the heating line 116, the return header 118, and the return water flow along the return line 120 in sequence to heat the heating zone (20).

In the water heating operation mode, the auxiliary water heater 1 does not operate. When the auxiliary hot water heating device (1) does not work, the bypass pipe line (171) is blocked by the water supply side three-way valve (136) and the return side three-way valve (151), and the heating unit (170) and the pump (172) operation is stopped.

When the hot water heating system is operated in the water heating operation mode, since the hot water supply 110 must be operated, energy consumption may be relatively large, but it is advantageous when the heating performance is good and the heating load is large.

On the other hand, when the current heating load (Lp) is less than or equal to the reference heating load (Lc), it can be viewed as a state in which only the auxiliary hot water heating device 1 can heat the corresponding heating zone 20 according to the current heating conditions.

Therefore, when the current heating load (Lp) is less than or equal to the reference heating load (Lc), the system controller 180 operates the hot water heating system in the circulation heating operation mode (S14). At this time, the system control unit 180 controls the water supply side three-way valve unit 135 , the return side three-way valve unit 150 , the pump 172 and the heating unit 170 included in the auxiliary hot water heating device 1 to circulate it. It can be operated by switching to the heating operation mode.

In the circulation heating operation mode, the water supply side three-way valve unit ( 135) and the return-side three-way valve unit 150 are controlled, and the pump 172 is operated to supply hot water stored in the water tank 133 connected to the return tube 120B through the bypass tube 171 through the water supply tube 112B. ), starting with sending hot water to the water supply pipe 120B, the internal water supply line 112C, the water supply header 114, the heating line 116, the return header 118, the internal return line 120A and the return pipe ( 120B) through the circulation passage. The hot water passing through the return header 118 is pumped to the bypass pipe 171 by the pump 172, and the hot water passing through the bypass pipe 171 is heated by the heating unit 170, so that the water supply side three-way valve It is re-supplied to the heating line 116 through the 136 and the water supply header 114 .

When the hot water heating system is operated in the circulation heating operation mode, the auxiliary hot water heating device 1 is used, which consumes relatively less energy compared to the case of operating and using the hot water supply 110, so that the operation can be performed while saving energy. can

In addition, the control method of the hot water heating system to which the auxiliary hot water heating device according to the present invention is applied further includes the step (S15) of determining whether the hot water in the circulation passage is insufficient while the hot water heating system is operated in the circulation heating operation mode.

In the step (S15) of determining whether hot water is insufficient, when the water level of the hot water in the water tank 133 measured by the level sensor reaches a preset minimum water level, it can be determined that the hot water is insufficient.

In addition, in the step (S15) of determining whether hot water is insufficient, it may be determined whether the difference between the supply temperature and the return water temperature of the circulating hot water, that is, the measured hot water temperature difference (ΔTwm) is within a preset temperature difference range. The return water temperature may be a temperature measured by the return water temperature sensor 132 , and the water supply temperature may be a temperature measured by the water supply temperature sensor 124 . Since the amount of heat that the heating unit 170 heats the hot water is constant, when the flow rate of the circulating hot water is reduced by evaporation or loss, the difference between the supply temperature and the return temperature of the circulating hot water is out of the reference temperature difference range.

If it is determined that the hot water in the circulation passage is insufficient as described above, the hot water heating system is operated in the hot water replenishment mode (S16). In order to switch from the circulation heating operation mode to the hot water replenishment mode, the system controller 180 stops the operation of the pump 172 , opens the return line 120 , and blocks the bypass pipe 171 . More specifically, the system controller 180 opens the return water discharge side flow path of the return side three-way valve 151 in a state where the operation of the pump 172 is stopped, and blocks the bypass side flow path of the return side three-way valve 151 do. In this hot water replenishment mode, the hot water in the return line 120 , more specifically, the external return line 120C, flows backwards to supplement the hot water in the circulation passage.

As described above, when the hot water heating system is operated in the hot water replenishment mode and the hot water replenishment is completed (S17), the circulation heating operation mode is restarted (S18). Whether the hot water replenishment has been completed is determined whether a set time has elapsed after starting the hot water replenishment mode, or whether the water level of the hot water in the water tank 133 measured by the level sensor has reached a preset reference level, or measured hot water It may be determined whether the temperature difference ΔTwm is within a preset temperature difference range. Steps S15, S16, S17, and S18 are additional steps for preventing the inoperative state of the auxiliary hot water heating device 1 due to evaporation or loss of hot water in the circulation passage. Even if evaporation or loss of hot water in the circulation passage does not occur or is ignored In this case, it may be omitted.

Also, the system controller 180 determines whether a predetermined termination condition is satisfied. At this time, when the condition for stopping the heating of the heating zone 20 is reached, the system controller 180 terminates the heating. Here, the predetermined termination condition may be various conditions such as an emergency situation, when a heating end signal is input through the temperature controller 181 or the main controller 182 , when a target temperature is reached, and the like.

On the other hand, the control method of the hot water heating system shown in FIG. 13 is a diagram for explaining in more detail an example of using the target indoor temperature difference Δ Tam as the current heating load.

In the control method of the hot water heating system shown in FIG. 13 , after the heating of the heating zone 20 is started, the current heating load using the target indoor temperature Tat and the current indoor temperature Tap set in the corresponding heating zone 20 . Calculating the target indoor temperature difference ΔTam as (S21), comparing the calculated target indoor temperature difference ΔTam with a preset reference indoor temperature difference ΔTac (S22), and the target indoor temperature difference Δ Tam) and the reference indoor temperature difference ΔTac, operating the hot water heating system in the water supply heating operation mode or the circulation heating operation mode (S23) (S24) according to the comparison result.

In step S21 of calculating the target indoor temperature difference ΔTam, the system controller 180 receives the current indoor temperature Tap from the indoor temperature sensor 126 to calculate the target indoor temperature difference ΔTam. The system controller 180 calculates the target indoor temperature difference ΔTam, which is a value obtained by subtracting the current indoor temperature Tap from the target indoor temperature Tat set for the corresponding heating zone 20 . to be.

The target indoor temperature Tat may be directly set by a user through, for example, the main controller 182 and the temperature controller 181 . Furthermore, the user may directly set the mode using the mode operation unit 102 .

Next, in the step S22 of comparing the target indoor temperature difference ΔTam and the reference indoor temperature difference ΔTac, the system controller 180 determines the calculated target indoor temperature difference ΔTam and the reference indoor temperature difference ΔTac. compare Here, the reference indoor temperature difference ΔTac may be set to an appropriate value according to the output of the heating unit 170 provided in the auxiliary hot water heating device 1 . For example, the reference indoor temperature difference ΔTac may be an appropriate value less than or equal to the temperature at which the temperature of the heating zone 20 can be maximally increased using the auxiliary hot water heater 1 .

When the target indoor temperature difference ΔTam is greater than the reference indoor temperature difference ΔTac, sufficient hot water is supplied to the auxiliary hot water heater 1 to raise the heating zone 20 to the current target indoor temperature Tat. It can be seen as difficult to do. Accordingly, when the target indoor temperature difference ΔTam is greater than the reference indoor temperature difference ΔTac, the system controller 180 operates the hot water heating system in the water supply heating operation mode (S23). As described above, in the water heating operation mode, since the heating zone 20 is heated with the hot water supplied from the hot water supply source 110, the energy consumption may be relatively high, but it is advantageous when the heating load is large due to good heating performance. .

On the other hand, when the target indoor temperature difference ΔTam is less than or equal to the reference indoor temperature difference ΔTac, the auxiliary hot water heating device 1 may be used to increase the heating zone 20 to the target indoor temperature. Accordingly, when the target indoor temperature difference ΔTam is equal to or less than the reference indoor temperature difference ΔTac, the system controller 180 switches the hot water heating system to the circulation heating operation mode (S24), thereby saving energy.

In addition, the control method of the hot water heating system may further include the step (S25) of determining whether the hot water in the circulation passage is insufficient while the hot water heating system is operated in the circulation heating operation mode.

In step S25 of determining whether hot water is insufficient, when the water level in the water tank 133 measured by the level sensor reaches a preset minimum water level, it may be determined that the hot water is insufficient.

In addition, in the step (S25) of determining whether hot water is insufficient, it may be determined whether the difference between the current water supply temperature and the current return water temperature of the circulating hot water, that is, the measured hot water temperature difference (ΔTwm) is within a preset range. More specifically, it is determined whether the measured hot water temperature difference ΔTwm is greater than a preset allowable temperature difference ΔTaa. If the measured hot water temperature difference (∆Twm) is less than the preset allowable temperature difference (∆Taa), it is judged that there is no shortage of hot water. judged to be insufficient.

The return water temperature may be a temperature measured by the return water temperature sensor 132 , and the water supply temperature may be a temperature measured by the water supply temperature sensor 124 . Since the amount of heat that the heating unit 170 heats hot water is constant, when the flow rate of circulating hot water is reduced by evaporation or disappearance, the measured hot water temperature difference ΔTwm becomes larger than the preset allowable temperature difference ΔTaa.

In addition, the control method of the hot water heating system further includes the step (S26) of operating the hot water heating system in the hot water supplement mode when the hot water in the circulation passage is insufficient. In order to switch from the circulation heating operation mode to the hot water replenishment mode, the system controller 180 stops the operation of the pump 172 , opens the return line 120 , and blocks the bypass pipe 171 . More specifically, the system control unit 180 opens the return water discharge side flow path of the return side three-way valve 151 in a state where the operation of the pump 172 is stopped, and closes the bypass side flow path of the return side three-way valve 131 . block In this hot water replenishment mode, the hot water in the return line 120 , more specifically, the external return line 120C, flows backwards to supplement the hot water in the circulation passage.

In addition, the control method of the hot water heating system includes the steps of determining whether hot water replenishment is completed while the hot water heating system is operated in the hot water replenishment mode (S27), and resuming the circulation heating operation mode when the hot water replenishment is completed (S28) may further include. Whether the hot water replenishment is complete is determined whether the set time has elapsed after the start of the hot water replenishment mode, or whether the water level of the hot water in the water tank 133 measured by the level sensor has reached a preset reference level, or the measured hot water temperature difference ( It may be determined whether ΔTwm) is within a preset temperature difference ΔTaa. Steps S25, S26, S27 and S28 are additional steps for preventing the inoperative state of the auxiliary hot water heating device 1 due to evaporation or loss of hot water in the circulation passage. You may omit it.

Also, the system controller 180 determines whether a predetermined termination condition is satisfied. At this time, when the condition for stopping the heating of the heating zone 20 is reached, the system controller 180 terminates the heating. Here, the predetermined termination condition may be various conditions such as an emergency situation, when a heating termination signal is input through the temperature controller 181 or the main controller 182 , when a target indoor temperature is reached, and the like.

On the other hand, the control method of the hot water heating system shown in FIG. 14 is a diagram for explaining in more detail an example in which the target floor temperature difference ΔTfm is used as the current heating load.

In the control method of the hot water heating system shown in FIG. 14 , after the heating of the heating zone 20 is started, the current heating load using the target floor temperature Tft and the current floor temperature Tfp set in the heating zone 20 . Calculating the target floor temperature difference ΔTfm as (S31), comparing the calculated target floor temperature difference ΔTfm with a preset reference floor temperature difference ΔTfc (S32), and the target floor temperature difference Δ Tfm) and the reference floor temperature difference (ΔTfc) according to the comparison result, and operating the hot water heating system in the water supply heating operation mode or the circulation heating operation mode (S33) (S34).

In step S31 of calculating the target floor temperature difference ΔTfm, the system controller 180 receives the current floor temperature Tfp from the floor temperature sensor 127 to calculate the target floor temperature difference ΔTfm. The system controller 180 calculates the target floor temperature difference ΔTfm, which is a value obtained by subtracting the current floor temperature Tfp from the target floor temperature Tft set for the corresponding heating zone 20 . to be.

The target floor temperature Tft may be directly set by a user through, for example, the main controller 182 and the temperature controller 181 . Furthermore, the user may directly set the mode using the mode operation unit 102 .

Next, in step S32 of comparing the target floor temperature difference ΔTfm and the reference floor temperature difference ΔTfc, the system controller 180 calculates the target floor temperature difference ΔTfm and the reference floor temperature difference ΔTfc compare Here, the reference floor temperature difference ΔTfc may be set to an appropriate value according to the output of the heating unit 170 provided in the auxiliary water heater 1 . For example, the reference floor temperature difference ΔTfc may be an appropriate value less than or equal to a temperature capable of maximally increasing the temperature of the heating zone 20 using the auxiliary water heater 1 .

When the target floor temperature difference ΔTfm is greater than the reference floor temperature difference ΔTfc, sufficient hot water is supplied to the auxiliary hot water heater 1 to raise the heating zone 20 to the current target floor temperature Tft. It can be seen as difficult to do. Accordingly, when the target floor temperature difference ΔTfm is greater than the reference floor temperature difference ΔTfc, the system controller 180 operates the hot water heating system in the water supply heating operation mode (S33). As described above, in the water heating operation mode, since the heating zone 20 is heated with the hot water supplied from the hot water supply source 110, the energy consumption may be relatively high, but it is advantageous when the heating load is large due to good heating performance. .

On the other hand, if the target floor temperature difference (ΔTfm) is less than or equal to the reference floor temperature difference (ΔTfc), it can be viewed as a state in which the heating zone 20 can be raised to the target floor temperature (Tft) with the auxiliary water heater 1 have. Therefore, when the target floor temperature difference ΔTfm is less than or equal to the reference floor temperature difference ΔTfc, the system controller 180 switches the hot water heating system to the circulation heating operation mode (S34), thereby saving energy and driving.

In addition, the control method of the hot water heating system may further include the step (S35) of determining whether the hot water in the circulation passage is insufficient while the hot water heating system is operated in the circulation heating operation mode.

In step S35 of determining whether hot water is insufficient, when the water level in the water tank 133 measured by the level sensor reaches a preset minimum water level, it may be determined that the hot water is insufficient.

In addition, in the step of determining whether hot water is insufficient ( S35 ), it may be determined whether the difference between the current water supply temperature and the current return water temperature of the circulating hot water, that is, the measured hot water temperature difference (ΔTwm) is within a preset range. More specifically, it is determined whether the measured hot water temperature difference ΔTwm is less than or equal to a preset allowable temperature difference ΔTaa. If the measured hot water temperature difference (∆Twm) is less than the preset allowable temperature difference (∆Taa), it is judged that there is no shortage of hot water. judged to be insufficient.

The return water temperature may be a temperature measured by the return water temperature sensor 132 , and the water supply temperature may be a temperature measured by the water supply temperature sensor 124 . Since the amount of heat that the heating unit 170 heats hot water is constant, when the flow rate of circulating hot water is reduced by evaporation or disappearance, the measured hot water temperature difference ΔTwm becomes larger than the preset allowable temperature difference ΔTaa.

In addition, the control method of the hot water heating system further includes the step (S36) of operating the hot water heating system in the hot water supplement mode when the hot water in the circulation passage is insufficient. In order to switch from the circulation heating operation mode to the hot water replenishment mode, the system controller 180 stops the operation of the pump 172 , opens the return line 120 , and blocks the bypass pipe 171 . More specifically, the system controller 180 opens the return water discharge side flow path of the return side three-way valve 151 in a state where the driving of the pump 172 is stopped, and closes the bypass side flow path of the return side three-way valve 131 . block In this hot water replenishment mode, the hot water in the return line 120 , more specifically, the external return line 120C, flows backwards to supplement the hot water in the circulation passage.

In addition, the control method of the hot water heating system includes the steps of determining whether hot water replenishment is completed while the hot water heating system is operated in the hot water replenishment mode (S37), and when the hot water replenishment is completed, resuming the circulation heating operation mode (S38) may further include. Whether the hot water replenishment is complete is determined whether the set time has elapsed after the start of the hot water replenishment mode, or whether the water level of the hot water in the water tank 133 measured by the level sensor has reached a preset reference level, or the measured hot water temperature difference ( It may be determined whether ΔTwm) is within a preset temperature difference ΔTaa. Steps S35, S36, S37 and S38 are additional steps to prevent the inoperative state of the auxiliary hot water heating device 1 due to evaporation or loss of hot water in the circulation passage. You may omit it.

Also, the system controller 180 determines whether a predetermined termination condition is satisfied. At this time, when the condition for stopping the heating of the heating zone 20 is reached, the system controller 180 terminates the heating. Here, the predetermined termination condition may be various conditions such as an emergency situation, when a heating termination signal is input through the temperature controller 181 or the main controller 182 , when a target floor temperature is reached, and the like.

On the other hand, the control method of the hot water heating system shown in FIG. 15 is a diagram for explaining in more detail an example of using the measured hot water temperature difference (ΔTwm) as the current heating load.

In the control method of the hot water heating system shown in FIG. 15 , after the heating of the heating zone 20 is started, the water supply temperature Tws of the hot water supplied to the heating line 116 and the return of the hot water returned from the heating line 116 . Calculating the measured hot water temperature difference ΔTwm using the temperature Twr (S41), and comparing the calculated measured hot water temperature difference ΔTwm with a preset reference hot water temperature difference ΔTwc (S42) and , according to the comparison result between the measured hot water temperature difference (ΔTwm) and the reference hot water temperature difference (ΔTwc) do.

In order to calculate the measured hot water temperature difference (ΔTwm), the system control unit 180 receives the water supply temperature (Tws) of the hot water supplied to the heating line 116 from the calorimeter 122 or the water supply temperature sensor 124, and returns The return temperature Twr of the hot water returned from the heating line 116 is provided from the temperature sensor 132 . Next, the system control unit 180 calculates the measured hot water temperature difference (ΔTwm) by subtracting the return water temperature (Twr) from the water supply temperature (Tws).

Next, in the step (S42) of comparing the measured hot water temperature difference (ΔTwm) and the reference hot water temperature difference (ΔTwc), the system controller 180 calculates the measured hot water temperature difference (ΔTwm) and the reference hot water temperature difference (ΔTwc) compare Here, the reference hot water temperature difference (ΔTwc) may be set to an appropriate value according to the output of the auxiliary hot water heating device (1). That is, the reference hot water temperature difference ΔTwc may be appropriately set in consideration of the hot water temperature that can be increased by the auxiliary hot water heating device 1 .

If the measured hot water temperature difference (ΔTwm) is greater than the reference hot water temperature difference (ΔTwc), only the auxiliary hot water heating device 1 supplies hot water of a sufficient temperature to heat the corresponding heating zone 20 according to the current heating conditions. It can be seen as difficult. Therefore, when the measured hot water temperature difference ΔTwm is greater than the reference hot water temperature difference ΔTwc, the system controller 180 operates the hot water heating system in the water supply heating operation mode (S43).

On the other hand, if the measured hot water temperature difference (ΔTwm) is less than or equal to the reference hot water temperature difference (ΔTwc), only the auxiliary hot water heating device 1 can supply hot water of a temperature sufficient to heat the corresponding heating zone 20 according to the current heating conditions. can be seen as possible. Therefore, when the measured hot water temperature difference ΔTwm is less than or equal to the reference hot water temperature difference ΔTwc, the system controller 180 converts the hot water heating system to the circulation heating operation mode (S44), thereby saving energy.

In addition, the control method of the hot water heating system further includes the step (S45) of determining whether the hot water in the circulation passage is insufficient while the hot water heating system is operated in the circulation heating operation mode.

In step S45 of determining whether hot water is insufficient, when the water level in the water tank 133 measured by the level sensor reaches a preset minimum water level, it may be determined that the hot water is insufficient.

In addition, in the step of determining whether hot water is insufficient ( S45 ), it may be determined whether the difference between the current water supply temperature and the current return water temperature of the circulating hot water, that is, the measured hot water temperature difference (ΔTwm) is within a preset range. More specifically, it is determined whether the measured hot water temperature difference (ΔTwm) is less than or equal to a preset allowable temperature difference (ΔTaa). If the measured hot water temperature difference (∆Twm) is less than the preset allowable temperature difference (∆Taa), it is judged that there is no shortage of hot water. judged to be insufficient.

In addition, the control method of the hot water heating system further includes the step (S46) of operating the hot water heating system in the hot water supplement mode when the hot water in the circulation passage is insufficient. In order to switch from the circulation heating operation mode to the hot water replenishment mode, the system controller 180 stops the operation of the pump 172 , opens the return line 120 , and blocks the bypass pipe 171 . More specifically, the system controller 180 opens the return water discharge side flow path of the return side three-way valve 151 in a state where the driving of the pump 172 is stopped, and closes the bypass side flow path of the return side three-way valve 131 . block In this hot water replenishment mode, the hot water in the return line 120 , more specifically, the external return line 120C, flows backwards to supplement the hot water in the circulation passage.

In addition, the control method of the hot water heating system includes the steps of determining whether hot water replenishment is completed while the hot water heating system is operated in the hot water replenishment mode (S47), and when the hot water replenishment is completed, resuming the circulation heating operation mode (S48) may further include. Whether the hot water replenishment is complete is determined whether the set time has elapsed after the start of the hot water replenishment mode, or whether the water level of the hot water in the water tank 133 measured by the level sensor has reached a preset reference level, or the measured hot water temperature difference ( It may be determined whether ΔTwm) is within a preset temperature difference ΔTaa. Steps S45, S46, S47 and S48 are additional steps for preventing the inoperative state of the auxiliary hot water heating device 1 due to evaporation or loss of hot water in the circulation passage. You may omit it.

Also, the system controller 180 determines whether a predetermined termination condition is satisfied. At this time, when the condition for stopping the heating of the heating zone 20 is reached, the system controller 180 terminates the heating. Here, the predetermined termination condition may be various conditions such as an emergency situation, when a heating end signal is input through the temperature controller 181 or the main controller 182 , when a target temperature is reached, and the like.

Now, a hot water heating system according to another embodiment of the present invention will be described with reference to FIG. 16 , in which the auxiliary hot water heating device 1 described above is directly connected to the heating line 16 and used, unlike the previous embodiment.

Referring to FIG. 16 , the hot water heating system according to the present embodiment includes a hot water supply source 110 , a water supply line 112 , a water supply header 114 , a heating line 116 , and a return water header 118 and , a return line 120 , an auxiliary hot water heating device 1 , and a system control unit 180 . As described in the above embodiment, the auxiliary hot water heating device 1 includes a water supply pipe 112B, a return pipe 120B, a water tank 133, a water supply side three-way valve unit 135, a return side three-way valve unit ( 150), a heating unit 170 and a pump 172, and a housing for accommodating them.

In this hot water heating system, the hot water supplied from the hot water supply source 110 flows to the heating line 116 to heat the heating zone 20 in which the heating line 116 is installed, or through the heating line 116 . A selective operation is possible in a circulation heating operation mode in which one hot water is heated and circulated by the auxiliary hot water heating device 1 and re-supplied to the heating line 116 .

A water supply line 112, a water supply header 114, a heating line 116, a return header 118, a return line 120, and a system control unit 180 are provided in each household to provide household heating facilities. configurable. In addition, one hot water supply source 110 may be installed to supply hot water to one or more households 10 . Each household 10 may include a plurality of heating zones 20 , and each heating zone 20 may include a heating line 116 , an auxiliary hot water heater 1 , and a temperature controller 181 one by one. .

The water supply line 112 may be connected to the hot water supply source 110 to introduce hot water supplied from the hot water supply source 110 to each household 10 . A calorimeter for measuring the heat amount or temperature of the hot water supplied into the household 10 may be installed in the water supply line 112 .

On the other hand, the water supply line 112 is an external water supply line 112A connected from the hot water supply source 110 to the water supply header 114, and the internal water supply connected from the water supply header 114 to the water supply inlet port of the auxiliary hot water heater 1 It includes a line 112C and a water supply pipe 112B included in the auxiliary water heater 1 and positioned between the internal water supply line 112C and the heating line 116 .

A water supply side three-way valve unit 135 may be installed at the connection position of the water supply pipe 112B and the heating line 116 , and a part of the water supply side three-way valve 136 included in the water supply side three-way valve unit 135 supplies water. The exhaust port is configurable.

The water supply temperature sensor 124 is installed in the water supply outlet port to which the water supply pipe 112B and the heating line 116 are connected. The installation position of the water supply temperature sensor 124 may be changed to various positions capable of measuring the supply temperature of the hot water supplied from the water supply line 112 to the heating line 116 . The temperature of the hot water supplied to the heating line 116 is measured through a calorimeter or a water supply temperature sensor 124 installed at an arbitrary position in the water supply line 116 and provided to the auxiliary heating device control unit 101 or the system control unit 180 can be

The water supply header 114 may distribute the hot water supplied through the water supply line 112 to the plurality of heating lines 116 .

The plurality of heating lines 116 are buried in the corresponding heating zone 20 so as to supply hot water to the corresponding heating zone 20 provided in each household 10 , and the hot water flows through the heating line 116 to provide heating. The zone 20 is heated. Here, the heating zone 20 may be a room, a living room, a kitchen, etc. provided in a household, and the size may be different. In addition, the length of the heating line 116 buried in each heating zone 20 and the flow rate of hot water supplied to each heating zone 20 may be designed differently according to the size of the heating zone 20 .

An indoor temperature sensor 126 for measuring an indoor temperature of the heating zone 20 is installed in the heating zone 20 . The indoor temperature sensor 126 measures the indoor temperature of the heating zone 20 and provides the measurement information to the auxiliary heating device controller 101 or the system controller 180 .

A floor temperature sensor 127 for measuring the floor temperature of the heating zone 20 may be further installed in the heating zone 20 . The floor temperature sensor 127 measures the floor temperature of the heating zone 20 and provides the measurement information to the auxiliary heating device controller 101 or the system controller 180 .

A water supply control valve may be connected upstream of the heating line 116 . The user may control the flow of hot water through the heating line 116 by manipulating the water supply control valve, or may control the flow rate of hot water supplied to the heating line 116 .

The return header 118 collects the hot water that has passed through the plurality of heating lines 116 and discharges them to the return line 120 .

The return line 120 is an external return line 120C connected from the hot water supply source 110 to the water supply header 114, and an internal return line connected from the return header 114 to the return water discharge port of the auxiliary hot water heater 1 ( 120A), and is included in the auxiliary water heater (1) and includes a return pipe (120B) located between the internal return line (112C) and the heating line (116).

A return-side three-way valve unit 150 may be installed at the connection position of the return pipe 120B and the internal return line 120A, and a part of the return-side three-way valve 151 included in the return-side three-way valve unit 150 may constitute the above-mentioned return water discharge port.

The water tank 133 serves to store the returned hot water in order to heat the returned hot water and circulate it again.

A level sensor (not shown) may be installed in the water tank 133 . The level sensor is provided to measure the water level of the hot water in the water tank. The level sensor measures the water level of the hot water in the water tank, and provides the measurement information to the auxiliary heating device control unit 101 or the system control unit 180 .

A water return control valve may be installed downstream of the heating line 116 .

In addition, a return temperature sensor 132 is installed in the return line 120 .

The auxiliary hot water heating device 1 is installed over the water supply line 112 and the return line 120 , and heats the hot water returned through the return line 120 with the heating unit 170 , and the water supply line 112 . It is configured to re-supply to the heating line 116 through.

The water exchange temperature sensor 132 measures the temperature of the hot water returned after passing through the heating zone 20 , and transmits the measurement information to the auxiliary heating device controller 101 or the system controller 180 .

The return line 120 passes through the return pipe 120B of the auxiliary hot water heater 1 and returns the hot water collected in the return header 118) to the hot water supply source 110 .

Auxiliary water heater (1) is a water supply pipe (112B), a return pipe (120B), a bypass pipe line (171), a water supply side three-way valve unit 135, and a return side three-way valve unit (150) inside the housing. and a water tank 133 , a heating unit 170 , and a pump 172 . All.

In addition, the auxiliary hot water heating device 1, the water supply temperature sensor 124 installed in the water supply line 120 to measure the water supply temperature, and the return line 120 further includes a return water temperature sensor 132 is installed.

In addition, the auxiliary hot water heating device (1) uses the information obtained from the sensing means including the water supply temperature sensor 124, the return water temperature sensor 132, the indoor temperature sensor 126, and the floor temperature sensor 128 to the water supply side three-way The valve unit 135, the return-side three-way valve unit 150, the heating unit 170 and the auxiliary heating device control unit 101 for controlling the operation of the pump 172, etc., connected to the auxiliary heating device control unit 101 A wheel knob type mode input unit that is exposed to the outside and allows the user to directly input the mode of the auxiliary water heater 1, and information related to the control of the auxiliary water heater 1, for example, It further includes a display unit for displaying various information such as water supply temperature, return water temperature, room temperature, floor temperature, the water level of the hot water in the tank, and the flow rate of the circulating hot water.

The auxiliary heating device controller 101 may be included as a part of the system controller 180 , and may be provided to enable wired/wireless communication with the main controller 182 and the temperature controller 181 .

The water supply pipe 112B is a part of the water supply line 112 for supplying hot water from the hot water supply source 110 to the heating line 116 , and the water supply line 112 and the heating line 116 together with the water supply side three-way valve unit 135 . ) to connect between The return pipe 120B is a part of the return line 12 that returns the hot water used for heating the heating zone to the hot water supply source 110, and the return line 120 and the heating line together with the return-side three-way valve unit 150 (116) It serves as a link between them. The water tank 133 is installed in the water exchange pipe 120B and serves to receive and store the hot water returned through the water exchange pipe 120B. The bypass pipe line 171 cooperates with the water supply side three-way valve unit 135 and the return side three-way valve unit 150, and the hot water returned in the circulation heating operation mode is the water supply line 112, more specifically the water supply pipe 112B ), which serves as a passage that allows bypassing.

The return-side three-way valve unit 150 is installed in the return pipe 120B of the return line 120 to selectively connect the bypass pipe 171 and the return pipe 120B, and in the circulation heating operation mode, the return line ( At the same time as blocking the flow of hot water through 120), the flow of hot water through the bypass pipe line 171 is allowed, so that the returned hot water is supplied back to the water supply line 112 to change the flow direction of the hot water.

The water supply side three-way valve unit 135 is installed in the water supply pipe 112B to selectively connect the bypass pipe line 171 and the water supply pipe 112B, and the hot water supply source 110 through the water supply line 112 in the circulation heating operation mode. ), while blocking the hot water supply, the flow direction of the hot water is changed so that the hot water passing through the bypass pipe line 171 flows back to the heating line 116 through the water supply pipe 112B).

The heating unit 170 heats the hot water supplied back to the water supply pipe 112B through the bypass pipe line 171 to increase the temperature of the hot water to a temperature usable for heating in the heating line 116 .

In the circulation heating operation mode, the return-side three-way valve unit 150 and the water-side three-way valve unit 135 operate, and the return pipe 120B, the bypass pipe 171, the water supply pipe 112B, the heating line 116 and Again, a circulation path composed of a return pipe (120B) is formed. In the circulation heating operation mode, the pump 172 connected to the circulation flow path, preferably the bypass pipe line 171, operates, so that hot water circulates through the circulation flow path. At this time, since the hot water is heated by the heating unit 170 and always maintained above a certain temperature, heating of the heating zone 20 can be continuously performed.

Now, the control method of the hot water heating system according to the present embodiment will be described with reference to FIGS. 16 and 17 together as follows.

16 and 17 , the control method of the hot water heating system according to the present embodiment includes the steps of calculating the current heating load Lp of the heating zone 20 after heating for the heating zone 20 is started. (S101) and the step of comparing the current heating load (Lp) with the preset reference heating load (Lc) (S102), and the current heating load (Lp) and the reference heating load (Lc) according to the comparison result between the hot water heating system It includes the steps (S103) and (S104) of operating in the water supply heating operation mode or in the circulation heating operation mode.

In the step S101 of calculating the current heating load Lp, the system controller 180 calculates the current heating load Lp required for heating the corresponding heating zone 20 under the heating conditions set by the user. In this case, the current heating load Lp is the target indoor temperature difference ΔTam calculated by the difference between the target indoor temperature of the heating zone 20 selected by the user and the current indoor temperature of the heating zone 20, and the heating zone selected by the user. The target floor temperature difference (ΔTfm) calculated by the difference between the target floor temperature of (20) and the current floor temperature of the heating zone (20), the water supply temperature (Tws) of the hot water supplied to the heating line (116), and the heating line (116) It may be the measured hot water temperature difference (ΔTwm) calculated by the difference of the return water temperature (Tws) of the hot water passing through.

In step S102 of comparing the current heating load Lp with the preset reference heating load Lc, the system controller 180 compares the calculated current heating load Lp with the reference heating load Lc. Here, the reference heating load (Lc) is determined as an appropriate value less than the maximum heating load that can be solved by the auxiliary hot water heating device (1).

When the target indoor temperature difference (ΔTam) is used as the current heating load (Lp), it is compared with the reference indoor temperature difference (ΔTac), which is the reference heating load (Lc), and the target floor temperature difference (ΔTfm) as the current heating load (Lp) When is used, it is compared with the reference floor temperature difference (ΔTfc), which is the reference heating load (Lc), and when the measured hot water temperature difference (ΔTwm) is used as the current heating load (Lp), the reference hot water temperature difference that is the reference heating load (Lc) compared with (ΔTwc).

When the current heating load (Lp) is greater than the reference heating load (Lc), it is considered difficult to supply enough hot water to heat the corresponding heating zone 20 with the auxiliary hot water heating device 1 according to the current heating conditions. can Therefore, when the current heating load (Lp) is greater than the reference heating load (Lc), the system control unit 180 operates the water heating system in the water heating operation mode (S103). At this time, the system control unit 180 controls the water supply side three-way valve unit 135 and the return side three-way valve unit 150 so that the flow of hot water through the bypass pipe 171 is blocked, and is supplied from the hot water supply source 110 . The hot water to be used flows sequentially along the water supply line 112 , the heating line 116 , and the return water line 120 to heat the heating zone 20 .

In the water heating operation mode, the auxiliary water heater 1 does not operate. When the auxiliary hot water heating device (1) does not work, the bypass pipe line (171) is blocked by the water supply side three-way valve (136) and the return side three-way valve (151), and the heating unit (170) and the pump (172) operation is stopped.

When the hot water heating system is operated in the water heating operation mode, since the hot water supply 110 must be operated, energy consumption may be relatively large, but it is advantageous when the heating performance is good and the heating load is large.

On the other hand, when the current heating load (Lp) is less than or equal to the reference heating load (Lc), it can be viewed as a state in which only the auxiliary hot water heating device 1 can heat the corresponding heating zone 20 according to the current heating conditions.

Therefore, when the current heating load (Lp) is less than or equal to the reference heating load (Lc), the system controller 180 operates the hot water heating system in the circulation heating operation mode (S104). At this time, the system control unit 180 controls the water supply side three-way valve unit 135 , the return side three-way valve unit 150 , the pump 172 and the heating unit 170 included in the auxiliary hot water heating device 1 to circulate it. It can be operated by switching to the heating operation mode.

In the circulation heating operation mode, the water supply side three-way valve unit 135 to block the hot water supply from the hot water supply source 110 through the water supply line 112 and to block the hot water return to the hot water supply source 110 through the return line 120 . ) and the return-side three-way valve unit 150, by operating the pump 172, the hot water stored in the water tank 133 connected to the return pipe 120B is supplied through the bypass pipe 171 through the water supply pipe 112B. Starting with sending to the , hot water is circulated along the circulation path passing through the water supply pipe 120B, the heating line 116 and the return pipe 120B. Hot water is pumped to the bypass pipe line 171 by the pump 172, and the hot water passing through the bypass pipe line 171 is heated by the heating unit 170, and through the water supply side three-way valve 136, the heating line ( 116) is re-supplied.

When the hot water heating system is operated in the circulation heating operation mode, the auxiliary hot water heating device 1 is used, which consumes relatively less energy compared to the case of operating and using the hot water supply 110, so that the operation can be performed while saving energy. can

In addition, the control method of the hot water heating system further includes the step (S105) of determining whether the hot water in the circulation passage is insufficient while the hot water heating system is operated in the circulation heating operation mode.

In the step (S105) of determining whether hot water is insufficient, when the water level of the hot water in the water tank 133 measured by the level sensor reaches a preset minimum water level, it can be determined that the hot water is insufficient.

In addition, in the step S105 of determining whether hot water is insufficient, it may be determined whether the difference between the return temperature of the circulating hot water and the water supply temperature, that is, the measured hot water temperature difference (ΔTwm) is within a preset temperature difference range. The return water temperature may be a temperature measured by the return water temperature sensor 132 , and the water supply temperature may be a temperature measured by the water supply temperature sensor 124 . Since the amount of heat that the heating unit 170 heats the hot water is constant, when the flow rate of the circulating hot water is reduced by evaporation or loss, the difference between the return temperature of the circulating hot water and the water supply temperature is out of the reference temperature difference range.

In addition, the control method of the hot water heating system further includes the step (S106) of operating the hot water heating system in the hot water replenishment mode when the hot water in the circulation passage is insufficient. In order to switch from the circulation heating operation mode to the hot water replenishment mode, the system controller 180 stops the operation of the pump 172 , opens the return line 120 , and the bypass pipe 171 and the water supply line 112 of the block upstream More specifically, the system controller 180 opens the return water discharge side flow path of the return side three-way valve 151 in a state where the driving of the pump 172 is stopped, and closes the bypass side flow path of the return side three-way valve 131 . block In this hot water replenishment mode, the hot water in the return line 120 , more specifically, the internal return line 120A and the external return line 120C flows backwards to replenish the hot water in the circulation passage.

In addition, the control method of the hot water heating system includes the steps of determining whether to replenish hot water while the hot water heating system is operating in the hot water replenishment mode (S107) and resuming the circulation heating operation mode when the hot water replenishment is completed (S108). may include more. Whether to replenish hot water is determined whether a set time has elapsed after starting the hot water replenishment mode, or whether the water level of the hot water in the water tank 133 measured by the level sensor has reached a preset reference water level, or whether the measured hot water temperature difference (△ Twm) may be determined by whether it is within a preset temperature difference range. Steps S105, S106, S107, and S108 are additional steps for preventing the inoperative state of the auxiliary hot water heating device 1 due to evaporation or loss of hot water in the circulation passage. Even if evaporation or loss of hot water in the circulation passage does not occur or is ignored In this case, it may be omitted.

Also, the system controller 180 determines whether a predetermined termination condition is satisfied. At this time, when the condition for stopping the heating of the heating zone 20 is reached, the system controller 180 terminates the heating. Here, the predetermined termination condition may be various conditions such as an emergency situation, when a heating end signal is input through the temperature controller 181 or the main controller 182 , when a target temperature is reached, and the like.

The control method of the heating system may be implemented the same as or similar to the method described above with reference to FIG. 13 when the target indoor temperature difference Δ Tam is used as the heating load Lp, and may be implemented as the heating load Lp. In the case of using the target floor temperature difference (ΔTfm), the same or similar method as described above with reference to FIG. 14 may be implemented. In the case of using the measured hot water temperature difference (ΔTwm) as the heating load (Lp), refer to FIG. 15 Therefore, it can be implemented the same as or similar to the method described above.

Meanwhile, FIGS. 18 and 19 are views showing various examples of the auxiliary hot water heating device.

18 shows an example in which the heating unit 170 installed in the bypass pipe 171 to heat the return water is a thermoelectric element.

19 shows an example in which the heating unit 170 is installed in the water tank 133 to heat the hot water in the water tank 133 instead of heating the hot water that is returned by being installed in the bypass pipe line 171 .

Although not shown, it may be considered that various heaters or thermoelectric elements directly introduced into the water tank 133 directly heat the hot water in the water tank.

As described above, the hot water heating system according to the present invention is provided with an auxiliary hot water heating device 1 that can be selectively used by heating the hot water passing through the heating line 116 , thereby reducing the heating load of the heating zone 20 . Accordingly, it is possible to selectively operate a water heating operation mode in which the heating zone 20 is heated with hot water supplied from the hot water supply source 110 or a circulation heating operation mode in which the heating zone 20 is heated with the auxiliary hot water heating device 1 . .

In addition, in the hot water heating system according to the present invention, when the heating load of the heating zone 20 is small, by using the auxiliary hot water heating device 1, which consumes less energy compared to the hot water supply source 110, by heating and re-supplying hot water. , energy-saving operation is possible, and operation cost can be reduced.

Although preferred examples of the present invention have been described above, the scope of the present invention is not limited to the forms described and illustrated above.

For example, in the above, it was mainly described that the hot water heating system was applied to an apartment house including a plurality of households 10, but the hot water heating system according to the present invention can be applied to various residential environments such as a detached house and a building, It can be applied to various heating methods such as heating and district heating.

In addition, in the hot water heating system according to the present invention, when a plurality of heating zones 20 and a plurality of heating lines 116 are provided in one household 10 , water supply heating operation or circulation for each of the heating zones 20 . Heating operation is possible.

While the present invention has so far been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as so shown and described, and is not intended to be limited by the scope of the appended claims. It will be understood by those skilled in the art that many changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention.

1: auxiliary hot water heating device 110: hot water supply
112: water supply line 112B: water supply pipe
116: heating line 120: return line
120B: water exchange pipe 133: water tank
135: water supply side three-way valve unit 150: return side three-way valve unit
170: heating unit 172: pump

Claims (10)

As an auxiliary hot water heating system applied to a hot water heating system that flows hot water from a hot water supply source to a heating line through a water supply line to heat a heating zone, and returns hot water that has passed through the heating line to a hot water supply source through a return line,
a water supply pipe forming a part of the water supply line;
a water exchange pipe forming a part of the return line;
a water tank connected to the water exchange pipe and installed to store hot water exchanged;
a bypass pipe for forming a hot water passage from the return pipe to the water supply pipe;
a return-side three-way valve unit installed so that the flow of hot water through the return line or the flow of hot water through the return pipe and the bypass pipe can be selectively made;
It is installed so that the flow of hot water through the water supply line or the flow of hot water through the water supply pipe and the bypass pipe can be selectively made, and in cooperation with the return-side three-way valve unit, the water supply pipe, the heating line, the return pipe, and the a water supply side three-way valve unit forming a circulation passage passing through a bypass pipe;
a pump for flowing hot water along the circulation passage; and
Auxiliary hot water heating device comprising a; a heating unit for heating the hot water in the water tank or the bypass pipe.
According to claim 1,
A water supply temperature sensor is installed in the water supply pipe,
Auxiliary hot water heating device, characterized in that the return water temperature sensor is installed in the return pipe.
According to claim 1,
Auxiliary hot water heating device, characterized in that the level sensor is installed in the water tank.
According to claim 1,
The return-side three-way valve unit includes a return-side three-way valve and a return-side valve actuator for operating the return-side three-way valve,
The return-side three-way valve includes a return-side valve housing and a return-side flow path switching member installed inside the return-side valve housing,
A three-way flow path opened to a return water discharge side, a return water inlet side, and a bypass pipe line is formed inside the return side valve housing,
The return-side flow path switching member includes three passages corresponding to the three-way flow path, and the return-side flow path switching member rotates to block one-way flow paths among the three-way flow paths and open the two-way flow paths to communicate. Auxiliary hot water heating system.
According to claim 1,
The water supply side three-way valve unit includes a water supply side three-way valve and a water supply side valve actuator for operating the water supply side three-way valve,
The water supply side three-way valve includes a water supply side valve housing and a water supply side flow path switching member installed inside the water supply side valve housing,
A three-way flow path opened to a water inlet side, a water supply outlet side, and a bypass pipe line is formed inside the water supply side valve housing,
The water supply-side flow path switching member includes three passages corresponding to the three-way flow path, and the water supply-side flow path switching member rotates to block the one-way flow path among the three-way flow paths and to open the two-way flow path to communicate. Auxiliary hot water heating system.
According to claim 1,
Auxiliary hot water heating device, characterized in that it further comprises a control unit for controlling the return-side three-way valve unit, the water supply-side three-way valve unit, the pump and the heating unit.
7. The method of claim 6,
an operation unit for applying an input signal to the control unit;
Auxiliary hot water heating device, characterized in that it further comprises a display unit for displaying the heating operation information.
7. The method of claim 6,
The control unit is
Controlling the return-side three-way valve unit, the water-side three-way valve unit, the pump and the heating unit to operate the hot water heating system in any one of a water supply heating operation mode and a circulation heating operation mode Auxiliary water heater.
9. The method of claim 8,
The control unit is
Comparing the current heating load with the standard heating load,
When the current heating load is greater than the reference heating load, the hot water heating system is operated in a water supply heating mode in which hot water circulates the hot water supply source, the water supply line, the heating line, the return line and the hot water supply source to heat the heating zone. control,
When the current heating load is less than the reference heating load, the hot water is heated by the heating unit and circulates through the circulation passage to control the hot water heating system to operate in a circulation heating mode to heat the heating zone. Device.
10. The method of claim 9,
The control unit is
Controls the hot water heating system to switch to a hot water replenishment mode for replenishing hot water when the hot water circulating in the circulation passage is insufficient while the hot water heating system is operated in the circulation heating mode,
In the hot water replenishment mode, stop the operation of the pump and the heating unit, and control the return-side three-way valve unit so that hot water flows through the return line and the flow of hot water through the return pipe and the bypass pipe is blocked. Auxiliary hot water heating system, characterized in that.

Images