KR101654743B1 - Heating and hot water supply apparatus in each household applying for regional or central heating and Control method of return hot water thereof - Google Patents

Heating and hot water supply apparatus in each household applying for regional or central heating and Control method of return hot water thereof Download PDF

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KR101654743B1
KR101654743B1 KR1020140183674A KR20140183674A KR101654743B1 KR 101654743 B1 KR101654743 B1 KR 101654743B1 KR 1020140183674 A KR1020140183674 A KR 1020140183674A KR 20140183674 A KR20140183674 A KR 20140183674A KR 101654743 B1 KR101654743 B1 KR 101654743B1
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South Korea
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heating
hot water
water
return
temperature
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KR1020140183674A
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Korean (ko)
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KR20160074887A (en
Inventor
김시환
허창회
송용민
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주식회사 경동나비엔
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Priority to KR1020140183674A priority Critical patent/KR101654743B1/en
Priority to PCT/KR2015/013861 priority patent/WO2016099172A1/en
Publication of KR20160074887A publication Critical patent/KR20160074887A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

The heating and hot water supply apparatus of the present invention includes a heating side supply pipe 203 for supplying heated water heated in the heat source supply unit 100 to a heating destination; A heating-side water return pipe (204) for returning heat water having undergone heat exchange at a heating destination to the heat source supply unit (100); A hot water supply pipe 205 for supplying heated water heated by the heat source supply unit 100 to the hot water heat exchanger 210; A hot water side return pipe 206 for returning hot water, which has undergone direct heat exchange with the hot water in the hot water heat exchanger 210, to the heat source supply unit 100; A direct water pipe 207 into which direct water flows; A hot water pipe 208 for allowing the direct water supplied through the direct water pipe 207 to be supplied to the user after heat exchange with the hot water supplied from the hot water heat exchanger 210 through the hot water side supply pipe 205; A heating side water recirculation temperature sensor 253 for sensing the temperature of the heating water recirculation water of the heating water circulated through the heating water recirculation pipe 204; A heating side flow rate regulating valve 261 for regulating the flow rate of the heating water circulated through the heating side return pipe 204; A hot water side return water temperature sensor 254 for detecting hot water return water temperature of the heating water that is returned through the hot water side water return pipe 206; A hot water side flow rate regulating valve 262 for regulating the flow rate of the hot water that is returned through the hot water side return pipe 206; The opening degree of the heating side flow rate regulating valve 261 is controlled so that the heating side return water temperature corresponds to the heating side set return water temperature and the opening degree of the hot water side flow amount regulating valve 262 is controlled so that the hot water side return water temperature corresponds to the hot water side set return water temperature As shown in FIG.

Figure R1020140183674

Description

TECHNICAL FIELD [0001] The present invention relates to a heating and hot water supply device and a control method for a hot water supply device,

The present invention relates to a heating and hot water supply device and a method for controlling a temperature of a hot water, which are applied to a district and a central heating, and more particularly, The present invention relates to a heating and hot water supply device and a method for controlling a temperature of a water heater,

Recently, a large apartment or a large-scale building has not only an individual heating system and a separate hot water supply system, but also installed a common heating system for the whole, and supplies hot water to each household or each floor through a common pipe network. After heating the water to the required temperature through the heat exchange between the hot water and the water, the system is installed in the regional and centralized way to supply the water to each household or each floor through the pipe network.

The piping structure connected to each individual household for the existing regional and central heating is composed of a four-pipe system including a heating water supply pipe, a heating water pipe, a hot water supply pipe for hot water supply, and a heating water pipe for hot water supply. However, while the four-pipe system can use both heating and hot water, a large amount of cost is incurred in maintenance and new installation. Recently, a heating water supply pipe and a heating water return pipe 2 pipe heating type hot water supply device.

FIG. 1 is a view showing a heating hot water supply device disclosed in Korean Utility Model Registration No. 20-471736. As shown in FIG.

The conventional heating hot water supply apparatus shown in FIG. 1 includes a heat exchanger 11 provided for supplying hot water to one side of a hot water pipe 1 to which hot water is supplied, and is provided for each household; A three-way valve (6) provided on the line of the heating water pipe (1) to select the supply of heating water to the heat exchanger (11); A hot water hot water piping (17) connected to the heat exchanger (11) and hot water is spouted; A direct water pipe (18) connected to the heat exchanger (11) at a position adjacent to the hot water hot water pipe (17) and supplied with direct water to the inside; A hot water mixing valve (13) disposed at an intersection where the hot water hot water pipe (17) and the direct water pipe (18) are connected to mix hot water with hot water; A flow rate sensor (14) provided on the line of the direct water pipe (18) for sensing the flow rate of the direct water flowing along the direct water pipe (18); A heating water supply distributor 5 connected to the heat exchanger 11; A heating water distributor (9) connected to the heating water return pipe (2) side to which the heating water is returned and connected to the heating water supply distributor (5) by a plurality of connection lines (7); A hot water bypass valve 10 disposed between the heating water supply distributor 5 and the heating water distributor 9 to bypass hot water; And a controller (19) for controlling the operation of the three-way valve (6), the hot water mixing valve (13) and the hot water bypass valve (10) based on information sensed by the flow rate sensor ).

According to such a conventional two-pipe hot water supply system, there is a problem that simultaneous use of heating and hot water is limited. That is, the three-way valve 6 is provided on the line of the heating water pipe 1 so that the heating water supplied through the heating water pipe 1 is supplied to either the heat exchanger 11 or the heating water supply / The heating operation is stopped when the hot water is used during heating operation.

On the other hand, in the case of the regional and central heating system, the heat source is supplied by the supply piping collectively, and each household is supplied with the heat source and used as the heat source of the heating and hot water, and the heat source is returned to the regional and central heating system through the water return pipe .

Due to this piping system, the length of the supply and return pipes of the main heat source is longer and the heat loss is generated as compared with the individual heating system. In order to minimize heat loss due to piping length and insulation, local and central heating systems require and recommend that the temperature recovered for the generation water return temperature and the main water return temperature be below a certain temperature. In the heating and hot water The supply device does not include a configuration capable of controlling the temperature of the water return to a certain temperature or lower.

In order to meet such a demand, various methods for lowering the water temperature are tried and applied. Regarding heating by household, it is common to limit the maximum heating flow rate of the household or to provide each valve to limit the maximum flow rate to each room. However, this installation does not reflect the adiabatic condition and seasonal change conditions, so that the heating may not be smooth and a complaint about the heating complaint may occur.

As another method for lowering the water temperature, a method using a hot water heat exchanger for each generation is also used. That is, the heating supply piping line for each household is used for heating supply through the hot water heat exchanger of each household. However, this method has the effect of lowering the temperature only when the hot water is used in the household, and since the heating supply temperature supplied to the household is determined according to the usage amount of the hot water, the heating temperature of the generation is low, have.

Alternatively, if the heating water temperature is high, the heating water may be introduced into the main water pipe through the hot water heat exchanger to lower the main water return temperature, or the hot water pipe may be preheated And the results are presented. However, this method also has a disadvantage in that it does not lower the main return temperature when the hot water is not used in the household or when the hot water pipe is fully preheated.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a heating and hot water supply system for heating and supplying hot water supplied from a heat source supply unit, The present invention is directed to a heating and hot water supply device and a method for controlling a temperature of a hot water of a household, which are applicable to a central heating and a central heating which can minimize energy loss.

According to an embodiment of the present invention, a heating and hot water supply apparatus 200 for households, which is applied to a local heating and a central heating according to an embodiment of the present invention, A heating side supply pipe 203 for supplying the heat; A heating-side water return pipe (204) for returning heat water having undergone heat exchange at the heating destination to the heat source supply unit (100); A hot water supply pipe 205 for supplying hot water heated by the heat source supply unit 100 to the hot water heat exchanger 210; A hot water side return pipe 206 for returning the hot water, which has undergone direct heat exchange with the hot water in the hot water heat exchanger 210, to the heat source supply unit 100; A direct water pipe 207 into which direct water flows; A hot water pipe 208 for supplying a direct water supplied through the direct water pipe 207 to the user after heat exchange with the hot water supplied through the hot water side supply pipe 205 from the hot water heat exchanger 210; A heating-side water-return temperature sensor 253 for sensing the temperature of the heating water-return water of the heating water that is returned through the heating water-return pipe 204; A heating side flow control valve 261 for regulating the flow rate of the heating water circulated through the heating side return pipe 204; A hot water side return water temperature sensor 254 for detecting hot water return water temperature of the hot water returned through the hot water side return water pipe 206; A hot water side flow rate regulating valve 262 for regulating the flow rate of the hot water that is returned through the hot water side return pipe 206; Side flow regulating valve (261) so that the heating-side return water temperature corresponds to the heating-side regeneration return water temperature, and the hot water-side flow regulating valve And a control unit for controlling the opening degree of the valve 262.

Wherein the heating-side set return water temperature is set in a range between an upper limit value and a lower limit value, and when the heating-side return water temperature exceeds an upper limit value of the heating-side set return water temperature, And controls the amount of opening of the heating-side flow control valve 261 to be decreased until the temperature becomes equal.

The control unit controls the opening degree of the heating-side flow control valve 261 to be increased when the heating-side return water temperature is lower than the lower limit value of the heating-side set return water temperature range.

Side regeneration water temperature is set in a range between an upper limit value and a lower limit value, and when the hot water-side return water temperature exceeds an upper limit value of the hot water-side set water-return temperature, And controls the opening of the hot water supply side flow rate regulating valve (262) to be lowered until the temperature reaches a predetermined value.

And the control unit controls the opening of the hot water supply side flow control valve 262 to be increased when the hot water returning water temperature is lower than the lower limit value of the hot water supply side set return water temperature range.

In the method of controlling the temperature of the heating and hot water supply unit for each household applied to the local and central heating according to the embodiment of the present invention, the heating water heated by the heat source supply unit 100 can be simultaneously used for heating and hot water (200a) is operated in a heating and hot water supply unit (200) for each household, Completely opening the heating side flow control valve 261 for regulating the flow rate of the heating water that is returned to the heat source supply unit 100 after the heating water heated by the heat source supply unit 100 passes through the heating destination; Detecting a heating-side water return temperature from a heating-side water return temperature sensor (253) provided in a heating-side water return pipe (204) for returning heating water to the heat source supply unit (100); Comparing the heating-side water return temperature and the heating-side set water return temperature; Side flow regulating valve 261 so that the opening degree of the heating-side flow regulating valve 261 is reduced until the heating-side regeneration return temperature reaches the heating-side regeneration return temperature when the heating-side return water temperature exceeds the upper limit value of the heating- And a control step.

When the heating side return water temperature is detected to be lower than the lower limit value of the heating side return water temperature in the step of comparing the heating side return water temperature and the heating side return water temperature, Is increased.

The method for controlling the temperature of the heating and hot water supply units according to another embodiment of the present invention applied to the local heating and the central heating may use the heating water heated by the heat source supply unit 100 for heating and hot water A water heater (200b) is operated in a heating and hot water supply unit (200) for households, The step of completely opening the hot water supply side flow control valve 262 for controlling the flow rate of the heating water returned to the heat source supply unit 100 after the heating water heated in the heat source supply unit 100 passes through the hot water heat exchanger 210 ; Detecting a hot water-side return water temperature in a hot water-side hot water return temperature sensor (254) provided in a hot water side hot water return pipe (206) for returning hot water to the heat source supply unit (100); Comparing the hot water-side return water temperature with the hot water-side set return water temperature set by the heat source supply unit (100); And that the opening degree of the hot water supply side flow rate regulating valve (262) is reduced until the hot water side return water temperature becomes the hot water side set return water temperature, when the hot water side return water temperature exceeds the upper limit value of the hot water side set return water temperature And a control step.

When the hot water side return water temperature is lower than the lower limit value of the hot water side set return water temperature in the step of comparing the hot water side return water temperature with the hot water side set return water temperature set by the heat source supply unit 100, So that the opening degree of the control valve 262 is increased.

According to the heating and hot water supply device and the water temperature control method for each household applied to the regional and central heating according to the present invention, the heating-side water-return temperature or the hot water temperature recovered after being used for heating or hot- Side flow rate control valve and the hot-side flow rate control valve are adjusted according to the return water temperature set in the regional and central heating systems, thereby minimizing the energy loss.

Further, according to the present invention, it is possible to maintain a constant temperature of the heating water at a temperature corresponding to the setting and recycling temperature required and recommended in the local and central heating systems regardless of heating and hot water loads, adiabatic conditions, And the thermal efficiency of the heating and hot water supply device can be improved.

1 is a view showing a heating hot water supply device disclosed in Korean Utility Model Registration No. 20-471736,
FIG. 2 is a configuration diagram of a heating and hot water supply device for each household applied to the regional and central heating according to an embodiment of the present invention;
FIG. 3 is a schematic view of a heating and hot water supply device for each household applied to regional and central heating according to another embodiment of the present invention,
FIG. 4 is a flow chart of a method for controlling the temperature of the heating water in the heating and hot water supply system for each household applied to the local and central heating according to the present invention,
FIG. 5 is a flowchart of a method for controlling the temperature of the water in operation of the water heater in the heating and hot water supply unit for each household applied to the regional and central heating according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a configuration diagram of a heating and hot water supply device for each household applied to a local heating and a central heating according to an embodiment of the present invention.

The heating and hot water supply device 200 for each household applied to the regional and central heating according to an embodiment of the present invention is heated by a heat source supplied from a regional and central heating system 100 So that the heater 200a and the water heater 200b can simultaneously use the heated water. Reference numeral 200 'denotes a heating and hot water supply device provided in another household, and may be configured to have the same structure as the reference numeral 200.

A heat exchanger 110 for transferring the heat generated from the heat source supply unit 100 to the heating and hot water supply apparatus 200 is provided between the heat source supply unit 100 and the heating and hot water supply unit 200 do. A heating medium supply pipe 111 and a heating medium return pipe 112 are circulated between the heat source supply unit 100 and the heat exchanger 110.

Between the heat exchanger 110 and the heating and hot water supply device 200 is connected a heat source supply pipe 201 to which the heating water heated by the heat exchanger 110 is supplied to the heating and hot water supply device 200, A heat source return pipe 202 through which the heating water passed through the apparatus 200 is returned to the heat exchanger 110 is connected and a heat source return pipe 202 is connected to the heat exchanger 110 and the heating and hot water supply apparatus 200 And a pump 240 for circulating the heating water is installed.

The piping structure of the heating and hot water supply device 200 includes a heating side supply pipe 203 branched from the heat source supply pipe 201 to supply the heating water to a heating destination (such as a room or a living room requiring heating) A heating water return pipe 204 for returning the heat water exchanged in the heat source to the heat source return pipe 202, a heating water supply pipe 204 branched from the heat source supply pipe 201 for supplying the heating water to the hot water heat exchanger 210 A hot water side return pipe 206 for returning hot water having undergone direct and heat exchange in the hot water heat exchanger 210 to the heat source return pipe 202 side, a direct water pipe A hot water pipe 208 for directing water supplied through the direct water pipe 207 to the user after heat exchange with the hot water supplied through the hot water supply pipe 205 in the hot water heat exchanger 210, .

The heating water supplied to the heating side supply pipe 203 is supplied to each heating destination by the heating water supply distributor 231. The heating water passed through the heating destination is supplied to the heating side water- And returned to the pipe 204.

The heat source supply pipe 201 and the heat source return pipe 202 connected to the respective generations are provided with a heat source supply temperature sensor 251 and a heat source return water temperature sensor 252, Provide reference temperature information.

The heating-side water return pipe 204 is provided with a heating-side water return-temperature sensor 253 for sensing the heating-water return water temperature of the heating water, a heating-side water return temperature sensor 253 for controlling the flow rate of the heating water, A flow control valve 261 is provided.

The hot water side return pipe 206 is provided with a hot water side return water temperature sensor 254 for detecting the hot water return water temperature of the hot water and a warm water side water temperature sensor 254 for regulating the flow rate of the hot water recovered through the hot water side return water pipe 206 A flow control valve 262 is provided.

The direct water pipe 207 is provided with a direct water temperature sensor 255 and a flow rate sensor 271 for sensing the flow rate of the direct water and the hot water pipe 208 is provided with a hot water temperature sensor 256.

The heating and hot water supply device 200 controls the opening degree of the heating side flow rate regulating valve 261 so that the heating side return water temperature corresponds to the required and recommended heating side return water temperature in the local and central heating systems, And a control unit (not shown) for controlling the opening of the hot water supply side flow rate regulating valve 262 so that the hot water return water temperature corresponds to the recommended hot water supply side regeneration return temperature in the regional and central heating system.

The heating-side set return water temperature Ts1 and the hot water-side set return water temperature Ts2 can be set within a range between the upper limit value Tr +? T and the lower limit value Tr-? T from the reference set value Tr. The heating-side set return water temperature Ts1 and the hot water-side set return water temperature Ts2 are values set in the local and central heating systems and can be set to the same or different temperatures.

For example, when the heating-side set return water temperature and the hot water-side set return water temperature are set to the same, and the reference set value Tr is set to 30 ° C and the temperature deviation T is set to 2 ° C, The upper limit value of the side set return water temperature is set to 32 deg. C, and the lower limit value is set to 28 deg.

When the heating-side return water temperature sensed by the heating-side water return temperature sensor 253 exceeds the upper limit value of the heating-side regeneration return water temperature, the control unit controls the heating- (261) is decreased. In this case, the flow rate of the heating water that is returned from the heating destination to the heating-side water return pipe 203 is reduced and the time during which the heating water stays in the heating destination is increased. Therefore, the amount of heat transferred from the heating water to the heating- The efficiency can be increased.

When the heating-side return water temperature is detected to be lower than the lower limit value of the heating-side set return water temperature range by the opening amount of the heating-side flow amount regulating valve 261, the control unit controls the opening degree of the heating- Respectively.

Likewise, when the hot water return temperature detected by the hot water side return water temperature sensor 254 exceeds the upper limit value of the hot water side set return water temperature, the control unit controls the hot water side return water temperature to the hot water side So that the opening degree of the flow control valve 262 is reduced. In this case, since the flow rate of the heating water returned from the hot water heat exchanger 210 to the heating-side water return pipe 203 is reduced and the time for which the heating water stays in the hot water heat exchanger 210 is increased, The heat transfer amount is increased and the heat exchange efficiency can be increased.

When the hot water return-water return temperature is detected to be lower than the lower limit value of the hot water-side set return water temperature range by the opening amount of the hot water-side flow amount regulating valve 262, the control unit controls the opening degree of the hot water- Respectively.

FIG. 3 is a configuration diagram of a heating and hot water supply device for each household applied to the regional and central heating according to another embodiment of the present invention.

2, the configuration of the heat exchanger 110 is omitted, and the heating water supplied to the heating-side supply pipe 203 passes through the heating heat exchanger 220, The heating water is returned to the heating water heat exchanger 204 and the heating water recovered from the water heating water distributor 232 is supplied to the heating water heat exchanger 220 by the pressure pump 241 of the heating pump 241, The heating water supply pipe 209a through which the heating water supplied to the heating water supply and distributor 231 is supplied after passing through the water heat exchanger 220 is supplied to the heating water supply pipe 209b through the water return pipe 209b, The heating water supply pipe 209a is provided with the heating water temperature sensor 258 and the heating water supply temperature sensor 257 is provided in the heating water supply pipe 209a. The other components are the same as those in the above- .

In this embodiment, similarly to the above-described embodiment, the heating-side water return pipe 204 is provided with the heating-side water return temperature sensor 253 and the heating-side flow rate adjusting valve 261, A water temperature sensor 254 and a water supply side flow rate control valve 262 are provided so that the heating side water return temperature and the hot water supply side water return temperature are kept constant in accordance with the heating side set water temperature and the hot water side set water temperature, The flow control valve 261 and the hot water supply side flow control valve 262 are controlled in terms of the amount of opening.

Hereinafter, a method of controlling the temperature of the heating water for heating in the heating and hot water supply apparatus for each household applied to the central heating and the central heating as described above will be described.

FIG. 4 is a flow chart of a method for controlling the temperature of the heating water in the heating and hot water supply system for each generation applied to the local and central heating according to the present invention.

In the heating and hot water supply device for each household applied to the local and central heating according to the present invention, the method for controlling the temperature of the heating device 200a during the operation of the heating device 200a controls the heating water heated by the heat source supply part 100 to be heated A step S10 of operating the heater 200a in the household heating and hot water supply device 200 configured to be used simultaneously and a step S10 of heating the heating source to the heating source supply unit 100 (S11) of fully opening the heating side flow control valve 261 for regulating the flow rate of the heating water to be returned to the heating source supply unit 100, and a heating side water return pipe 204 for returning the heating water to the heat source supply unit 100 (S13) of comparing the heating-side return water temperature and the heating-side return water temperature (S13); comparing the heating-side water return temperature with the heating-side water return temperature Setback On Side flow regulating valve 261 is decreased to a point at which the heating-side return water temperature becomes the heating-side regeneration return temperature when the upper limit value of the heating-side flow regulating valve 261 is exceeded (S14) (S15). When it is detected that the heating-side return water temperature is lower than the lower limit value of the heating-side set return water temperature, the heating-side flow amount regulating valve 261 is opened, (S16). In a state where the opening degree of the heating side flow control valve 261 is increased, the heating side return water temperature is compared with the heating side return water temperature (S17) (S18) controlling the opening of the heating-side flow control valve 261 to be in a stop state when the temperature of the heating-side return water is within the temperature range of the heating-side return water temperature, The return temperature so as to satisfy the heating-side return temperature setting range comprises a step (S19) for adjusting the opening of the heating-side flow rate adjustment valve 261.

FIG. 5 is a flowchart of a method for controlling the temperature of a water heater in a heating and hot water supply system for each household applied to regional and central heating according to the present invention.

In the heating and hot water supply system for households and central heating according to the present invention, the method for controlling the temperature of the water heater 200b during the operation of the water heater 200b is a method for controlling the heating water heated by the heat source supply unit 100, (Step S20) in which the water heater 200b is operated in the household heating and hot water supply device 200 configured to be used at the same time. After the heating water heated in the heat source supply unit 100 passes through the hot water heat exchanger 210, A step S21 of fully opening the hot water flow control valve 262 for regulating the flow rate of the hot water to be returned to the supply part 100 and a step S21 of heating the hot water side return pipe A step (S22) of detecting a hot water side return water temperature from a hot water side return water temperature sensor (254) provided in the hot water side return water temperature sensor (206), a step (S23) of comparing the hot water side return water temperature and a hot water side set return water temperature Set the hot water side (S24) so that the opening of the hot water supply side flow control valve 262 is decreased until the hot water return water temperature reaches the hot water supply side regeneration return temperature when the upper limit value of the water temperature is higher than the upper limit value of the water temperature, (S25). When it is detected that the hot water side return water temperature is lower than the lower limit value of the hot water side set return water temperature, the hot water side flow amount regulating valve 262 (S26). In the state where the opening degree of the hot water supply side flow control valve 262 is increased (S27), the hot water side return water temperature is compared with the hot water side set return water temperature (S28) controlling the opening of the hot water supply side flow control valve 262 to be in a stop state when the temperature of the hot water supply side return water temperature is within the hot water supply side set return water temperature range, The side return temperature consists of a step (S29) for adjusting the opening degree of the hot water supply-side flow rate control valve 262 so as to satisfy the hot water supply-side return temperature setting range.

According to the heating and hot water supply device and the water temperature control method for each household applied to the regional and central heating of the present invention, the heating and hot water supply device 200 for each household is used for heating or hot water supply, And the opening degree of the heating side flow regulating valve 261 and the hot water side flow regulating valve 262 are adjusted according to the return water temperature set in the regional and central heating systems by detecting the heating side return water temperature or the hot water return water temperature, The heating water temperature can be maintained at a constant temperature corresponding to the set temperature of the heating water required and recommended in the local and central heating system irrespective of the heating and hot water load, And the thermal efficiency of the hot water supply device 200 can be improved.

100: heat source supply unit 111: heat medium supply pipe
112: Heat medium return pipe 110: Heat exchanger
200,200 ': Heating and hot water supply device 200a: Radiator
200b: water heater 201: heat source supply pipe
202: Heat source return pipe 203: Heating side supply pipe
204: heating side return pipe 205: hot water side feed pipe
206: hot water return pipe 207: direct water pipe
208: hot water pipe 209a: heating water pipe
209b: Heating water return pipe 210: Hot water heat exchanger
220: Heating heat exchanger 231: Heating water supply distributor
232: Heating water distributor 240: Pump
241: Heating pump 251: Heat source supply temperature sensor
252: Heat source return temperature sensor 253: Heating side return temperature sensor
254: hot water return temperature sensor 255: direct water temperature sensor
256: Hot water temperature sensor 257: Heating supply temperature sensor
258: Heat recovery water temperature sensor 261: Heating side flow control valve
262: Hot water supply side flow rate control valve 271: Flow rate sensor

Claims (9)

A heating side supply pipe 203 for supplying heated water heated by the heat source supply unit 100 to a heating destination;
A heating-side water return pipe (204) for returning heat water having undergone heat exchange at the heating destination to the heat source supply unit (100);
A hot water supply pipe 205 for supplying hot water heated by the heat source supply unit 100 to the hot water heat exchanger 210;
A hot water side return pipe 206 for returning the hot water, which has undergone direct heat exchange with the hot water in the hot water heat exchanger 210, to the heat source supply unit 100;
A direct water pipe 207 into which direct water flows;
A hot water pipe 208 for supplying a direct water supplied through the direct water pipe 207 to the user after heat exchange with the hot water supplied through the hot water side supply pipe 205 from the hot water heat exchanger 210;
A heating-side water-return temperature sensor 253 for sensing the temperature of the heating water-return water of the heating water that is returned through the heating water-return pipe 204;
A heating side flow control valve 261 for regulating the flow rate of the heating water circulated through the heating side return pipe 204;
A hot water side return water temperature sensor 254 for detecting hot water return water temperature of the hot water returned through the hot water side return water pipe 206;
A hot water side flow rate regulating valve 262 for regulating the flow rate of the hot water that is returned through the hot water side return pipe 206; And
Controls the opening of the heating-side flow control valve (261) so that the heating-side return water temperature corresponds to the heating-side set return water temperature required and recommended in the local and central heating systems, and the hot water- And a control unit for controlling the opening of the hot water supply side flow rate regulating valve 262 so as to correspond to the recommended hot water supply side setback water temperature,
Wherein the controller controls the opening degree of the heating-side flow control valve (261) to decrease when the heating-side return water temperature exceeds the heating-side set return water temperature, and the heating- Side flow control valve 261 is increased, and when the hot-water-side return water temperature exceeds the hot water-side set return water temperature, the opening degree of the hot water-side flow amount regulating valve 262 is decreased And controls the opening degree of the hot water supply side flow control valve 262 to increase when the hot water returning water temperature is lower than the hot water supply side set return water temperature,
Wherein the heating-side set return water temperature and the hot water-side set return water temperature are set to the same temperature range. The method according to claim 1,
Wherein the heating-side set return water temperature is set in a range between an upper limit value and a lower limit value,
When the heating-side return water temperature exceeds the upper limit value of the heating-side set return water temperature, the control unit controls the opening degree of the heating-side flow amount regulating valve 261 until the heating-side return water temperature reaches the heating- And the heating and hot water supply unit is applied to the district and central heating. 3. The method of claim 2,
Wherein the control unit controls the opening degree of the heating-side flow control valve (261) to be increased when the heating-side return water temperature is lower than the lower limit value of the heating-side set return water temperature range Heating and hot water supply. The method according to claim 1,
The hot water supply side set return water temperature is set in a range between an upper limit value and a lower limit value,
When the hot-water side return water temperature exceeds the upper limit value of the hot water-side set return water temperature, the control unit controls the opening degree of the hot water-side flow amount regulating valve 262 until the hot water- And the heating and hot water supply unit is applied to the district and central heating. 5. The method of claim 4,
Wherein the controller controls the opening degree of the hot water supply side flow control valve (262) to be increased when the hot water returning water temperature is lower than the lower limit value of the hot water side set return water temperature range Heating and hot water supply. A step in which the heater 200a is operated in a household heating and hot water supply device 200 configured to simultaneously use heating water heated by the heat source supply unit 100 for heating and hot water generation for each household;
Completely opening the heating side flow control valve 261 for regulating the flow rate of the heating water that is returned to the heat source supply unit 100 after the heating water heated by the heat source supply unit 100 passes through the heating destination;
Detecting a heating-side water return temperature from a heating-side water return temperature sensor (253) provided in a heating-side water return pipe (204) for returning heating water to the heat source supply unit (100);
Comparing the heating-side return water temperature with a heating-side set return water temperature required and recommended in the local and central heating systems; And
When the heating-side return water temperature exceeds the upper limit value of the heating-side set return water temperature, the opening degree of the heating-side flow amount regulating valve 261 is decreased until the heating-side return water temperature reaches the heating- And controlling the opening degree of the heating-side flow control valve (261) to be increased when the heating-side return water temperature is lower than the lower limit value of the heating-side set return water temperature;
A method for controlling the temperature of a heating and hot water supply unit in a household, the method comprising: delete A step of operating the water heater 200b in a heating and hot water supply unit 200 for each household configured to simultaneously use heated water heated by the heat source supply unit 100 for heating and hot water for each household;
The step of completely opening the hot water supply side flow control valve 262 for controlling the flow rate of the heating water returned to the heat source supply unit 100 after the heating water heated in the heat source supply unit 100 passes through the hot water heat exchanger 210 ;
Detecting a hot water-side return water temperature in a hot water-side hot water return temperature sensor (254) provided in a hot water side hot water return pipe (206) for returning hot water to the heat source supply unit (100);
Comparing the hot water-side return water temperature with a recommended hot water-side return water temperature in the local and central heating systems; And
When the hot water side return water temperature exceeds the upper limit value of the hot water side set return water temperature, the opening degree of the hot water side flow amount regulating valve 262 is decreased until the hot water side return water temperature becomes the hot water side set return water temperature And controlling the opening of the hot water supply side flow control valve (262) to increase when the hot water returning water temperature is detected to be lower than the lower limit value of the hot water supply side set return water temperature;
A method for controlling the temperature of a heating and hot water supply unit in a household, the method comprising: delete
KR1020140183674A 2014-12-19 2014-12-19 Heating and hot water supply apparatus in each household applying for regional or central heating and Control method of return hot water thereof KR101654743B1 (en)

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