GB2503781A - Hybrid heat pump boiler system - Google Patents

Hybrid heat pump boiler system Download PDF

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Publication number
GB2503781A
GB2503781A GB1308083.3A GB201308083A GB2503781A GB 2503781 A GB2503781 A GB 2503781A GB 201308083 A GB201308083 A GB 201308083A GB 2503781 A GB2503781 A GB 2503781A
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GB
United Kingdom
Prior art keywords
pipe
unit
heat
heat exchanger
water
Prior art date
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Granted
Application number
GB1308083.3A
Other versions
GB201308083D0 (en
GB2503781B (en
Inventor
Poong Sang Yoo
Soo Chul Kim
Kee Soon Lee
Nak Young Song
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CLK CORP
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CLK CORP
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Priority to KR20120057249 priority Critical
Priority to KR1020120143479A priority patent/KR101255760B1/en
Application filed by CLK CORP filed Critical CLK CORP
Publication of GB201308083D0 publication Critical patent/GB201308083D0/en
Publication of GB2503781A publication Critical patent/GB2503781A/en
Application granted granted Critical
Publication of GB2503781B publication Critical patent/GB2503781B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00Other domestic- or space-heating systems
    • F24D15/04Other domestic- or space-heating systems using heat pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00Domestic hot-water supply systems
    • F24D17/0026Domestic hot-water supply systems with conventional heating means
    • F24D17/0031Domestic hot-water supply systems with conventional heating means with accumulation of the heated water
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00Domestic hot-water supply systems
    • F24D17/02Domestic hot-water supply systems using heat pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00Details
    • F24D19/10Arrangement or mounting of control or safety devices
    • F24D19/1006Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1021Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00Details
    • F24D19/10Arrangement or mounting of control or safety devices
    • F24D19/1006Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1072Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00Hot-water central heating systems
    • F24D3/08Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/082Hot water storage tanks specially adapted therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00Hot-water central heating systems
    • F24D3/18Hot-water central heating systems using heat pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H4/00Fluid heaters using heat pumps
    • F24H4/02Liquid heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B13/00Compression machines, plant or systems with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B27/00Machines, plant, or systems, using particular sources of energy
    • F25B27/02Machines, plant, or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00Heat sources or energy sources
    • F24D2200/04Gas or oil fired boiler
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00Heat sources or energy sources
    • F24D2200/08Electric heater
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00Heat sources or energy sources
    • F24D2200/12Heat pump
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00Components of central heating installations excluding heat sources
    • F24D2220/02Fluid distribution means
    • F24D2220/0235Three-way-valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/004Outdoor unit with water as a heat sink or heat source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/009Compression machines, plant, or systems with reversible cycle not otherwise provided for indoor unit in circulation with outdoor unit in first operation mode, indoor unit in circulation with an other heat exchanger in second operation mode or outdoor unit in circulation with an other heat exchanger in third operation mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02732Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means using two three-way valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • F25B49/022Compressor control arrangements
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12Hot water central heating systems using heat pumps
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Abstract

The hybrid heat pump boiler system comprises a water tank unit 300, a boiler unit 400, and an indoor 100 and outdoor unit 200 that together form a heat pump. The outdoor unit has a compressor 210 to compress a refrigerant, a 4-way valve 220 to change a flow-path of the refrigerant discharged from the compressor, a first heat exchanger 230 to allow refrigerant from the 4-way valve to pass through and exchange thermal energy with water from the water tank unit, a first expansion valve 270 to expand refrigerant from the first heat exchanger during a water and space heating operation, and a fan coil unit 250 to receive refrigerant from the first expansion valve. The boiler unit has a heat pipe 470 connected with an exhaust gas recovery heat exchanger 401. The heat pipe may pass thermal energy captured from the boiler unit to the outdoor units fan coil unit when defrosting of the coil 252 is required, for example, in winter. Alternatively, the heat pipe may pass the thermal energy to an auxiliary tank (460, figure 5). A second expansion valve 280 is provided and may be used with the indoor unit to cool an interior space.

Description

[DESCRIPTION]

[Disclosure Title]

HYBRID HEAT PUMP BOILER SYSTEM

[Technical Field]

Exemplary embodiments relate to a hybrid heat pump boiler system, and more particularly, to a multi-purpose high efficiency system which allows one system to be capable of performing all of space heating/cooling, floor heating and four-season hot water supply and can recover waste heat of a boiler unit to solve a problem caused due to frosting in a winter time.

[Background Art]

In general, a heat pump system refers to a heating/cooling apparatus which transfers a low temperature heat source to a high temperature condition or transfers a high temperature heat source to a low temperature condition, using heat generation or condensation heat of a refrigerant.

Such a heat pump system includes a compressor, an outdoor unit which has an outdoor heat exchanger, and an indoor unit having an expansion valve and an indoor heat exchanger.

However, in the case where the heat pump system is used for heating, it is the norm that heating efficiency may abruptly decrease or heating or hot water supply may not be sufficiently performed, due to frosting in a winter time during which the temperature of outdoor air is low.

In order to solve the problem of the heat pump system, a heating/cooling system which is capable of performing hot water supply has been suggested.

Although a conventional heating/cooling heat pump capable of performing hot water supply has considerably improved usability by additionally providing hot water supply in addition to heating/cooling, hot water supply may be inappropriately performed, the efficiency of cooling may be degraded while providing hot water supply or the efficiency of hot water supply may be degraded while providing cooling.

[References of the Related Art] [Patent Document] (Patent Document 1) Korean Patent Registration No. 10-877055 (Patent Document 2) Korean Patent Registration No. 10-877056

[Disclosure]

[Technical Problem] Embodiments are directed to overcoming limitations in the performance of a boiler and technical limitations related with defrosting and performance deterioration at a low temperature, of a heat pump, by integrally constructing a heat pump, a boiler unit and a water tank unit. Also, embodiments are directed to being capable of providing floor heating and four-season hot water supply by using various heat sources (heat of indoor/outdoor air and waste heat of the exhaust gas of a boiler) so that advantages of a boiler and a heat pump may be combined to achieve optimal efficiency, and simultaneously or selectively performing space heating and floor heating. Further, S embodiments are directed to being capable of solving a problem caused due to frosting of a heat exchanger of a fan coil part of an outdoor unit in a winter time, by recovering waste heat of the exhaust gas of a boiler unit.

[Technical Solution] A hybrid heat pump boiler system according to an embodiment may include an outdoor unit linked with an indoor unit to constitute a heat pump, a water tank unit and a boiler unit which are integrally constructed with one another, the outdoor unit including: a compressor constructed to compress a refrigerant to a high temperature and a high pressure; a 4-way valve constructed to change a flow path of the refrigerant discharged from the compressor; a hot water heat exchanger constructed to allow the refrigerant having passed through the 4-way valve to flow therethrough and exchange heat with water from the water tank unit; first and second expansion valves constructed to allow the refrigerant having passed through the hot water heat exchanger to be decreased in pressure and temperature; and a fan coil part constructed to allow the refrigerant having passed through the first expansion valve to pass therethrough so as to implement heat exchange, and the water tank unit including: a heat storage tank having circulation pipes which allow water to be circulated through the hot water heat exchanger of the outdoor unit; and a heating water heat exchanger having a connection pipe which allows heating to be performed, and connected with a return pipe which is connected with the connection pipe and allows heating water to be returned to the boiler unit, S wherein the boiler unit has a heat pipe which is connected with an exhaust gas recovery heat exchanger arranged at a position where an exhaust gas is discharged, exchanges heat with the exhaust gas discharged and transfers a heat source to the fan coil part of the outdoor unit.

The first expansion valve may be installed on a connection pipe which passes through the hot water heat exchanger and is connected with the fan coil part, and the second expansion valve may be installed on a connection pipe which is connected with the indoor unit.

Two 3-way valves may be installed on a connection pipe between the 4-way valve and the hot water heat exchanger, one 3-way valve thereof being connected with a connection pipe which passes through an indoor heat exchanger of the indoor unit, and the other 3-way valve thereof being connected with a bypass pipe which is bypassed from the connection pipe and is connected with the 4-way valve.

A bypass pipe may be formed to be bypassed from the connection pipe and be connected with the connection pipe which is connected with the fan coil part.

A 3-way valve may be installed on the bypass pipe to be positioned on a distal end of the fan coil part, and the connection pipe which passes through the indoor unit and the connection pipe which passes through the hot water heat exchanger may be connected to the 3-way valve via the fan coil part after being joined to a branching pipe.

The bypass pipe which is bypassed from the connection pipe and is connected with the 4-way valve and the bypass pipe which is bypassed from the connection pipe S and is connected with the connection pipe connected with the fan coil part may be connected with each other through a connection pipe in such a way as to allow the refrigerant to flow to the compressor in a heating mode.

A bypass pipe may be connected with the 3-way valve of the bypass pipe and the connection pipe which is connected with the indoor unit.

The boiler unit may be connected with a floor heating part through which heating water is circulated to perform floor heating.

A 3-way valve may be installed on the circulation pipe, and bypass pipes which are bypassed from the circulation pipe may be connected to the 3-way valve via the heating water heat exchanger.

A 3-way valve may be installed at a branching point of the circulation pipe and the bypass pipe in such a way as to allow water flowing out of the heat storage tank and having passed through the hot water heat exchanger to be selectively or simultaneously introduced into the heating water heat exchanger and the heat storage tank.

A 3-way valve may be installed on the return pipe, and a bypass pipe which is connected with the floor heating part to supply heating water may be connected with the 3-way valve.

An inlet pipe and an outlet pipe may be connected to the boiler unit such that the inlet pipe is connected with the heat storage tank and hot water may be discharged through the outlet pipe via a second heat exchanger which is disposed in the boiler unit.

A 3-way valve may be installed on the inlet pipe in such a way as to be S connected with the outlet pipe so that water in the heat storage tank may not be passed through the boiler unit and may be directly used as hot water.

The boiler unit has an exhaust gas recovery heat exchanger, and a heat pipe is connected with the exhaust gas recovery heat exchanger such that an exhaust gas discharged is transferred to the fan coil part of the outdoor unit.

A branching pipe may be arranged at a place where the connection pipe of the outdoor unit and the connection pipe of the indoor unit meet with each other, and a flow control valves may be installed on the connection pipe of the indoor unit and/or a flow control valve may be installed on the connection pipe past the branching pipe.

An auxiliary tank may be provided in such a way as to be connected with a heat pipe which is connected with an exhaust gas recovery heat exchanger formed at a position where an exhaust gas produced from the boiler unit is discharged from the boiler unit and recovers a heat source of the exhaust gas, and to be transferred with the heat source. Connection pipes, which are branched from the bypass pipe and pass through a heat exchanger of the fan coil part of the outdoor unit, may be connected to the auxiliary tank, and a connection pipe, which is connected with the return pipe, may be connected to one end of the auxiliary tank such that hot water may flow into the return pipe and may be introduced into the boiler unit.

[Advantageous Effects] As is apparent from the above descriptions, in the embodiments, since a heat pump, a boiler unit and a water tank unit are integrally constructed, miniaturization is possible so that space utilization efficiency is increased, the hybrid heat pump boiler system may be easily installed on an existing house and it is possible to avoid inconvenience due to separate installation of a boiler unit and a heat pump.

In the embodiments, space heating/cooling, floor heating and four-season hot water supply may be provided, and total efficiency may be optimally improved through a combination of optimal operations of the heat pump and the boiler unit according to the temperature of outside air.

In the embodiments, space heating and floor heating may be selectively or simultaneously performed.

In the embodiments, by recovering the waste heat of the exhaust gas which is produced from the boiler unit, the performance of the heat pump may be maximized and it is possible to solve a problem caused due to frosting in a winter time. As a consequence, an operating time of a conventional boiler which uses only a fossil fuel may be shortened, and accordingly, emission of carbon dioxide may be reduced to provide an environment4riendly system.

In the embodiments, in a cooling mode, condensation heat may be recovered to use hot water.

In the embodiments, by constructing the hybrid heat pump boiler system in a parallel module type, sufficient matching may be made for even a large capacity.

S In the embodiments, smart operating functions, such as a total energy priority operation, a carbon dioxide emission priority operation, an energy cost priority operation, a power peak avoiding operation, and so forth, are possible.

[Description of Drawings]

FIG. 1 is a construction view illustrating a hybrid heat pump boiler system in accordance with an embodiment, in a heating mode and when using hot water.

FIG. 2 is a construction view illustrating the hybrid heat pump boiler system of FIG. 1 in a cooling mode.

FIG. 3 is a construction view illustrating a hybrid heat pump boiler system in accordance with another embodiment, capable of simultaneously performing space heating and floor heating.

FIG. 4 is a construction view illustrating the hybrid heat pump boiler system of FIG. 3 in a cooling mode.

FIG. 5 is a construction view illustrating a hybrid heat pump boiler system in accordance with still another embodiment, showing a connection structure of a heat pipe and an auxiliary tank.

FIG. 6 is a construction view illustrating the hybrid heat pump boiler system of FIG. 5 in a cooling mode.

[Best Model Hereinafter, exemplary embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

In the following detailed description, it is to be noted that a system to be mentioned denotes not a method but an apparatus.

FIG. 1 is a construction view illustrating a hybrid heat pump boiler system in accordance with an embodiment, in a heating mode and when using (supplying) hot water.

Referring to FIG. 1, a hybrid heat pump boiler system 1 in accordance with an embodiment includes an outdoor unit 200 which is linked with an indoor unit 100 to constitute a heat pump, a water tank unit 300, and a boiler unit 400.

The indoor unit 100 includes an indoor heat exchanger 110 and a blower 120.

The outdoor unit 200 includes a compressor 210 which compresses a refrigerant to a high temperature and a high pressure, a 4-way valve 220 which changes the flow path of the refrigerant discharged from the compressor 210, a hot water heat exchanger 230 through which the refrigerant having passed through the 4-way valve 220 flows and exchanges heat with water from the water tank unit 300, a first expansion valve 240 which allows the refrigerant having passed through the hot water heat exchanger 230 to be reduced in the pressure and temperature thereof, and a fan coil part 250 through which the refrigerant having passed through the first expansion valve 240 flows and exchanges heat.

As the refrigerant having passed through the fan coil part 250 is introduced into S the compressor 210 again through the 4-way valve 220, one cycle is completed.

The fan coil part 250 is constituted by a blower 251 and a heat exchanger 252.

The fan coil part 250 serves as a heat exchange part which allows heat exchange to be implemented as the refrigerant having passed through the first expansion valve 240 flows thereth rough.

The indoor heat exchanger 110 of the indoor unit 100 is connected with the outdoor unit 200 through connection pipes 111 and 112 so that cooling/heating of an indoor space is implemented.

In the embodiment, the 4-way valve 220 is connected with the fan coil part 250 through the hot water heat exchanger 230 via connection pipes 260 and 270. Two 3-way valves 261 and 262 are installed on the connection pipe 260 between the 4-way valve 220 and the hot water heat exchanger 230. One 3-way valve 261 is connected with the connection pipe 111 which passes through the indoor heat exchanger 110 of the indoor unit 100, and the other 3-way valve 262 is connected with a bypass pipe 263 which is bypassed from the connection pipe 260 and is connected with the 4-way valve 220.

The 3-way valve 262 functions to selectively change the flow path of the refrigerant toward the hot water heat exchanger 230 or the 4-way valve 220.

A bypass pipe 271 is formed on the connection pipe 270. The bypass pipe 271 is bypassed from the connection pipe 270 and is connected with the connection pipe 112 which is connected with the fan coil part 250.

S A 3-way valve 272 is installed on the bypass pipe 271 to be positioned on the distal end of the fan coil part 250. The connection pipe 112, which passes through the indoor unit 100, and the connection pipe 270, which passes through the hot water heat exchanger 230, are connected to the 3-way valve 272 through the fan coil part 250 after being joined to a branching pipe 273.

A valve 271a for controlling the flow path of the refrigerant is installed on the bypass pipe 271.

A check valve 274 is installed on the connection pipe 270 at a position next to the first expansion valve 240.

A bypass pipe 277 is formed in such a way as to be connected with the 3-way valve 272 of the bypass pipe 271 and the connection pipe 111 which is connected with the indoor unit 100.

The bypass pipe 263 and the bypass pipe 271 are connected with each other through a connection pipe 275. A check valve 276 is installed on the connection pipe 275 to control whether to pass the refrigerant therethrough.

The connection pipe 112, which passes through the indoor heat exchanger 110 of the indoor unit 100, is connected with the fan coil part 250 of the outdoor unit 200.

A second expansion valve 280 is installed on the connection pipe 112.

An accumulator 290 is arranged between the 4-way valve 220 and the S compressor 21 0.

The water tank unit 300 has a structure which is constituted by a heat storage tank 310 and a heating water heat exchanger 320.

The boiler unit 400 is constituted by a burner 410, first and second heat exchangers 420 and 430, and an expansion tank 440.

In the embodiment, a floor heating part 500 is provided to allow the heating water discharged from the boiler unit 400 to be circulated therethrough so as to perform floor heating.

In addition to the floor heating part 500, a radiator (not shown) may be connected in such a way as to circulate heating water therethrough.

The heat storage tank 310 of the water tank unit 300 has circulation pipes 330 and 340 which pass through the hot water heat exchanger 230 of the outdoor unit 200 and which are connected with the heat storage tank 310 to allow water to be circulated therethrough.

A 3-way valve 331 is installed on the circulation pipe 330. Bypass pipes 341 and 342 which are bypassed from the circulation pipe 340 are connected to the 3-way valve 331 through the heating water heat exchanger 320.

A 3-way valve 343 is installed at a branching point of the circulation pipe 340 and the bypass pipe 341.

The 3-way valve 343 functions to direct the water flowing through the circulation pipe 340 only to the heating water heat exchanger 320, or direct one portion of the S water to the heating water heat exchanger 320 and the other portion of the water back to the heat storage tank 310.

In other words, the 3-way valve 343 may simultaneously or selectively perform operations for allowing the hot water having passed through the hot water heat exchanger 230 to heat the heating water which is returned after exchanging heat, in the heating water heat exchanger 320, and to be introduced into the heat storage tank 310 so as to store the heat of hot water.

In the drawing, a relief valve 344 is arranged over the heat storage tank 310 so that a pressure may be discharged in the case where a high pressure is developed in the heat storage tank 310.

A water supply pipe 311 is connected to the bottom of the heat storage tank 310, a pressure reducing valve 312 is installed on the water supply pipe 311, and a drain pipe 313 for draining water in the heat storage tank 310 is connected to the bottom of the heat storage tank 310.

A circulation pump 332 is installed on the circulation pipe 330 to circulate the water from the heat storage tank 310.

A connection pipe 510 which is connected with the floor heating part 500 is connected to the heating water heat exchanger 320. The connection pipe 510 is connected with a return pipe 520 which allows heating water to be returned to the boiler unit 400, through the heating water heat exchanger 320.

S A pump 512 is installed on the connection pipe 510.

A 3-way valve 521 is installed on the return pipe 520, and a bypass pipe 522, which is connected with the floor heating part 500, is connected to the 3-way valve 521.

An inlet pipe 450 and an outlet pipe 460 are connected to the boiler unit 400 such that the inlet pipe 450 is connected with the heat storage tank 310 and hot water may be discharged through the second heat exchanger 430 in the boiler unit 400.

A 3-way valve 451 is installed on the inlet pipe 450, and the outlet pipe 460 is connected to the 3-way valve 451.

A heating water inlet pipe 441, which allows heating water to be returned through the return pipe 520, is connected to the expansion tank 440 in the boiler unit 400.

Supply pipes 442 and 443, which supply heating water to the floor heating part 500 through a supply pipe 523 and a bypass pipe 522 via the first heat exchanger 420, are connected to the expansion tank 440 in the boiler unit 400.

A pump 444 for supplying heating water is installed on the supply pipe 442.

A 3-way valve 445 is installed on the supply pipe 443. The 3-way valve 445 is connected with a bypass pipe 446 which is connected with the return pipe 520 through the second heat exchanger 430.

A branching pipe 447 is arranged where the return pipe 520 and the bypass pipe 446 are joined with each other.

According to the embodiment, the waste heat of the exhaust gas which is discharged from the boiler unit 400 may be recovered and utilized. An exhaust gas S recovery heat exchanger 401 is arranged at a position (corresponding to a side or the top of the boiler unit 400) where the exhaust gas is discharged from the boiler unit 400.

A heat pipe 470 is connected with the exhaust gas recovery heat exchanger 401 such that the exhaust gas discharged is transferred to the fan coil part 250 of the outdoor unit 200.

The heat pipe 470 is coupled up to the heat exchanger 252 which is provided in the fan coil part 250 of the outdoor unit 200.

In another embodiment, referring to FIGS. 3 and 4, a branching pipe 264 is arranged instead of the 3-way valve 261 which is installed at the place where the connection pipe 260 of the outdoor unit 200 and the connection pipe 111 of the indoor unit 100 meet with each other, and a flow control valve 113 is installed on the connection pipe 111 of the indoorunit 100.

Due to this fact, not only space cooling but also floor heating and space heating may be simultaneously performed.

A flow control valve 114 is installed on the connection pipe 260 at a position which is past the branching pipe 264 and is adjacent to the hot water heat exchanger 230.

Further, in still another embodiment, referring to FIGS. 5 and 6, an auxiliary tank 480 is additionally provided in such a manner that the auxiliary tank 480 is connected with the heat pipe 470 which is connected with the exhaust gas recovery heat exchanger 401 formed at the position where the exhaust gas is discharged from the S boiler unit 400 and recovers the heat source of the exhaust gas produced from the boiler unit 400, and is transferred with the heat source. Connection pipes 481 and 482 which are branched from the bypass pipe 522 and pass through the heat exchanger 252 of the fan coil part 250 of the outdoor unit 200 are connected to the auxiliary tank 480. A connection pipe 483 which is connected with the return pipe 520 is connected to one end of the auxiliary tank 480 such that hot water may flow into the return pipe 520 and may be introduced into the boiler unit 400.

A valve 484 is installed on the connection pipe 481, and a drain pipe 485 is connected with the connection pipe 481.

In the embodiment, both the flow control valves 113 and 114 may be installed or any one of the flow control valves 113 and 114 may be selectively installed.

Operations of the hybrid heat pump boiler system 1 in accordance with the embodiments will be described below by being divided into a heating mode, a cooling mode and when using hot water.

[Heating mode] Referring to FIG. 1, according to the embodiment, space heating and floor heating may be selectively or simultaneously performed. First, in the case of floor heating, the outdoor unit 200, the water tank unit 300 and the boiler unit 400 are operated while the indoor unit 100 is not operated.

As the outdoor unit 200 is operated, the high temperature high pressure refrigerant discharged from the compressor 210 flows into the hot water heat exchanger 230 through the connection pipe 260 via the 4-way valve 220.

After being discharged from the hot water heat exchanger 230, the refrigerant passes through the first expansion valve 240 via the connection pipe 270, sequentially flows through the fan coil part 250, the 3-way valve 272, the connection pipe 275 and the 4-way valve 220, and is then introduced into the compressor 210 via the accumulator 290, by which one cycle is completed.

At this time, the valve 271a installed on the bypass pipe 271 is in a closed state.

The water discharged from the heat storage tank 310 of the water tank unit 300 is circulated through the hot water heat exchanger 230 to implement heat exchange, while flowing through the circulation pipes 330 and 340.

Namely, because the high temperature high pressure refrigerant passes through the hot water heat exchanger 230 via the connection pipe 260 due to the operation of the outdoor unit 200, heat exchange occurs between the refrigerant and the water discharged from the heat storage tank 310. As a consequence, the temperature of water flowing through the circulation pipe 330 is raised when measured while flowing through the circulation pipe 340. The water (hot water) in this state passes through the 3-way valve 343, the bypass pipe 341 and the heating water heat exchanger 320, and is then circulated into the circulation pipe 330 through the bypass pipe 342 and the 3-way valve 331.

The heating water discharged through the first heat exchanger 420 from the expansion tank 440 of the boiler unit 400 is supplied to the floor heating part 500 S through the supply pipe 523 and the bypass pipe 522 so that floor heating is implemented. The heating water having passed through the floor heating part 500 passes through the heating water heat exchanger 320 via the connection pipe 510 and is returned to the expansion tank 440 of the boiler unit 400 through the return pipe 520.

Since the temperature of the heating water having passed through the floor heating part 500 is low, a temperature rise occurs as the heating water passes through the heating water heat exchanger 320.

That is to say, since the water discharged from the heat storage tank 310 passes through the heating water heat exchanger 320 in the state in which it has obtained a heat source while passing through the hot water heat exchanger 230 of the outdoor unit 200 and thus its temperature has been raised, it exchanges heat with the heating water having passed through the floor heating part 500. Therefore, the low temperature heating water is returned to the boiler unit 400 through the return pipe 520 in the state in which its temperature is raised.

The hot water having passed through the hot water heat exchanger 230 of the outdoor unit 200 which constitutes the heat pump exchanges heat in the heating water heat exchanger 320. In the state in which the heat quantity of the hot water is sufficient, the heating water flowing through the connection pipe 510 by the pump 512 is not introduced into the boiler unit 400 and immediately flows to the floor heating part 500 through the bypass pipe 522 via the 3-way valve 521 so that floor heating is implemented.

S In the case where heat quantity is insufficient while the hot water having passed through the hot water heat exchanger 230 exchanges heat in the heating water heat exchanger 320, the heating water flowing through the connection pipe 510 is introduced into the boiler unit 400, is heated therein, and then flows again to the floor heating part 500 through the supply pipe 523 so that floor heating is implemented.

Accordingly, an amount of gas needed to heat water by the boiler unit 400 for floor heating or hot water supply may be reduced.

In the case where hot water is to be used, water is introduced into the boiler unit 400 through the inlet pipe 450 from the heat storage tank 310 and is passed through the second heat exchanger 430. Consequently, high temperature hot water is discharged from the outlet pipe 460 which is connected to an outside of the boiler unit 400, so that hot water may be used.

In the case where the temperature of the hot water in the heat storage tank 310 is sufficient, the hot water in the heat storage tank 310 is not passed through the boiler unit 400 and is bypassed to the outlet pipe 460 through the 3-way valve 451 from the inlet pipe 450 so as to be used as hot water.

The water heated to a high temperature while passing through the first heat exchanger 420 is supplied to the floor heating part 500 through the supply pipe 443, and, at the same time, is branched through the 3-way valve 445. The branched water flows through the branching pipe 447 after passing through the second heat exchanger 430 via the bypass pipe 446, and is introduced into the expansion tank 440 through the heating water inlet pipe 441. During this course, the temperature of the water discharged from the heat storage tank 310 is raised through the second heat exchanger 430 so that the water becomes hot water.

In the embodiment, the waste heat of the exhaust gas which is produced by operating the boiler unit 400 may be employed. The exhaust gas discharged from the boiler unit 400 exchanges heat with the heat pipe 470 in the exhaust gas recovery heat exchanger 401, and the heat pipe 470 having obtained a heat source provides a heat source to the heat exchanger 252 of the fan coil part 250 of the outdoor unit 200.

Accordingly, in the case where the temperature of externally sucked air falls below zero in a winter time and the fins of the heat exchanger 252 are frosted, defrosting is performed through the heat pipe 470 which exchanges heat with the waste heat of the exhaust gas from the boiler unit 400.

In the case where space heating is required, the flow path of the 3-way valve 261 on the connection pipe 260 is changed such that the refrigerant is delivered to the connection pipe 111 which is connected with the indoor unit 100. As a consequence, hot air is provided from the indoor heat exchanger 110 which is included in the indoor unit 100, so that space heating is implemented. The refrigerant is introduced again into the compressor 210 through the 4-way valve 220 after passing through the heat exchanger 252 of the fan coil part 250 via the connection pipe 112.

In the embodiment shown in FIG. 1, through the 3-way valve 261, one portion of S the refrigerant is circulated through the hot water heat exchanger 230 via the 3-way valve 262, and the other portion of the refrigerant is introduced into the indoor unit 100 through the connection pipe 111 so that space heating is implemented.

Accordingly, in the embodiment shown in FIG. 1, the refrigerant may be selectively delivered to one desired place through the 3-way valve 261 or may be delivered to two places so that space heating and floor heating may be simultaneously implemented.

[Cooling mode] In the case of a cooling mode, referring to FIG. 2, the high temperature high pressure refrigerant discharged from the compressor 210 in the outdoor unit 200 flows to the bypass pipe 263 through the 4-way valve 220 and passes through the hot water heat exchanger 230 via the 3-way valve 262.

The refrigerant having passed through the hot water heat exchanger 230 flows through the 3-way valve 272 via the bypass pipe 271, passes through the heat exchanger 252 of the fan coil part 250, and is directed to the indoor heat exchanger 110 of the indoor unit 100 after passing through the connection pipe 112 via the second expansion valve 280.

The high temperature high pressure refrigerant is converted into low temperature low pressure refrigerant after passing through the heat exchanger 252 of the fan coil S part 250 and the second expansion valve 280, and provides cool air to the indoor space while flowing through the indoor heat exchanger 110 of the indoor unit 100. Then, the refrigerant is introduced again into the compressor 210 through the 4-way valve 220 and the accumulator 290 after passing through the 3-way valve 261 and the connection pipe 260 via the connection pipe 111.

Since the cooling mode generally corresponds to a summer time, the boiler unit 400 is not operated.

However, by providing a portion of the heat source of the refrigerant from the outdoor unit 200 to the heat storage tank 310 of the water tank unit 300, hot water may be used.

In other words, while the high temperature high pressure refrigerant discharged from the compressor 210 passes through the hot water heat exchanger 230 which is disposed in the outdoor unit 200, water from the heat storage tank 310 flows through the circulation pipe 330 by the operation of the circulation pump 332 and passes through the hot water heat exchanger 230. The water takes a heat source (condensation heat) away from the high temperature high pressure refrigerant, flows through the circulation pipe 340 in a temperature-raised state, and is introduced again into the heat storage tank 310, so as to be used as hot water.

Hence, it is possible to provide a system capable of using hot water all the year round.

S In the cooling mode according to the embodiment, in the case where condensation of the refrigerant is sufficiently implemented in the hot water heat exchanger 230, the refrigerant is not directed to the heat exchanger 252 of the fan coil part 250 at the 3-way valve 272, is bypassed to the bypass pipe 277, flows through the connection pipe 112 via the second expansion valve 280, and passes through the indoor heat exchanger 110 of the indoor unit 100, so that cooling is implemented.

In another embodiment shown in FIG. 3, floor heating and space heating may be simultaneously performed.

In detail, the branching pipe 264 is arranged at the place where the connection pipe 260 of the outdoor unit 200 and the connection pipe 111 of the indoor unit 100 meet with each other, and the flow control valve 113 is installed on the connection pipe 111 in such a way as to be separated from the branching pipe 264. The high temperature high pressure refrigerant discharged from the compressor 210 flows toward the hot water heat exchanger 230 by passing through the branching pipe 264 via the 4-way valve 220 and the connection pipe 260, and at the same time, flows through the flow control valve 113 and passes through the indoor heat exchanger 110 of the indoor unit 100 via the connection pipe 111.

Accordingly, since the heat source of the outdoor unit 200 may be simultaneously directed toward the floor heating part 500 and the indoor unit 100, it is possible to simultaneously perform floor heating by the floor heating part 500 and space heating by the indoor unit 100.

S Of course, in the case of cooling, the same operations as those of the embodiment shown in FIG. 2 are performed.

In still another embodiment, referring to FIG. 5, while heating water is supplied by the boiler unit 400, the waste heat of the exhaust gas produced from the boiler unit 400 is recovered through the heat pipe 470 from the exhaust gas recovery heat exchanger 401 to raise the temperature of water in the auxiliary tank 480. The water in the auxiliary tank 480 with a raised temperature is passed through the fan coil part 250 of the outdoor unit 200 via the connection pipes 481 and 482, and is introduced into the boiler unit 400 through the connection pipe 483 and the return pipe 520. As a consequence, it is possible to solve a problem caused due to frosting of the heat exchanger 252 of the fan coil part 250 constituting the outdoor unit 200 in a winter time (through a defrosting function), and, since water with a heat source to some extent is introduced again into the boiler unit 400, gas consumption of the boiler unit 400 may be reduced.

That is to say, in the embodiment shown in FIG. 5, when a defrosting operation is performed by transferring only the heat source of the waste heat of the exhaust gas from the boiler unit 400 to the fan coil part 250 through the heat pipe 470 as in the embodiment shown in FIG. 1, in the case where the heat quantity of the waste heat of the exhaust gas transferred is insufficient, as shown in FIG. 5, a defrosting function may be performed not only by heat exchange with the heat pipe 470 in the auxiliary tank 480 but also by receiving a portion of the heat source of the heating water as the heating S water is circulated through the connection pipes 481 and 482.

In the embodiments, a heat pump and a boiler unit may be held at an optimal operation state according to the temperature of outside air. For example, a heat pump sole operation is performed in the case where the temperature of outside air is 3Li or over, a combined operation is performed in the case where the temperature of outside air is between -12r1 and 21, and a boiler unit sole operation is performed in the case where the temperature of outside air is -13-or under.

Such operating conditions according to the temperature of outside air do not have any limiting senses, and conditions of outside air may be changed.

In the embodiments, smart operating functions are possible. For instance, it is possible to perform a total energy priority operation, a carbon dioxide emission priority operation, an energy cost priority operation, a power peak avoiding operation, and so forth.

Namely, in the total energy priority operation, operating efficiencies of the heat pump and the boiler unit are compared according to the temperature of outside air.

Consequently, for example, in the case where the temperature of outside air is 3D or over, a heat pump sole operation is performed, and, in the case where the temperature of outside air is between -1 2r1 and 2r1, a combined operation is performed such that the heat pump is operated with priority and the boiler unit is complementarily operated when a load is insufficient.

A boiler unit sole operation is performed in the case where the temperature of outside air is -13-or under.

In the carbon dioxide emission priority operation, the heat pump which emits a small amount of carbon dioxide is operated with priority at a place where a limit is placed on emission of carbon dioxide.

In the energy cost priority operation, a power rate and a gate rate per unit heat quantity are compared, and the boiler unit and the heat pump are selectively operated in such a manner that a cost per unit heat quantity is minimized.

In the power peak avoiding operation, in the case where a limit is placed on power peak, a boiler unit priority operation is performed to avoid the power peak.

In the embodiments, since a heat pump, a boiler unit and a water tank unit are integrally constructed, miniaturization is possible so that space utilization efficiency is increased. In the case where an installation space is limited, a heat storage tank of a water tank unit may be separately installed.

Although the present invention has been described with reference to the embodiments shown in the drawings, these embodiments are illustrative only and those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the technical protection scope of the present invention. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

S [Description of Reference Numerals]

1: hybrid heat pump boiler system 100: indoor unit 110: indoor heat exchanger 111, 112: connection pipes 113, 114: flow control valves 120: blower 200: outdoor unit 210: compressor 220: 4-way valve 230: hot water heat exchanger 240: first expansion valve 250: fan coil part 251: blower 252: heat exchanger 260: connection pipe 261, 262: 3-way valves 263: bypass pipe 264: branching pipe 270: connection pipe 271: bypass pipe S 271a: valve 272: 3-way valve 273: branching pipe 274: check valve 275: connection pipe 276: check valve 280: second expansion valve 290: accumulator 300: water tank unit 310: heat storage tank 311: water supply pipe 312: pressure reducing valve 313: drain pipe 320: heating water heat exchanger 330: circulation pipe 331: 3-way valve 332: circulation pump 340: circulation pipe 341, 342: bypass pipes 343: 3-way valve 400: boiler unit 401: exhaust gas recovery heat exchanger 410: burner 420: first heat exchanger 430: second heat exchanger 440: expansion tank 441: heating water inlet pipe 442, 443: supply pipes 444: pump 445: 3-way valve 446: bypass pipe 447: branching pipe 450: inlet pipe 451: 3-way valve 460: outlet pipe 470: heat pipe 480: auxiliary tank 481, 482, 483: connection pipes 484: valve 485: drain pipe 500: floor heating part 510: connection pipe 512: pump 520: connection pipe 521: 3-way valve 522: bypass pipe 523: supply pipe

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GB2509354A (en) * 2012-10-05 2014-07-02 Lobils Ltd Apparatus to heat domestic hot water and water for a space heating system
GB2518471A (en) * 2013-09-23 2015-03-25 Clk Corp Hybrid heat pump boiler system
CN105650850A (en) * 2016-02-22 2016-06-08 吉首大学 Heat supply system of biomass boiler
CN105716271A (en) * 2016-02-22 2016-06-29 吉首大学 Exhaust heat recovery and dust removal integrated biomass boiler heating system
GB2533981A (en) * 2015-03-16 2016-07-13 Clk Corp Hybrid heat pump boiler system
EP3252383A1 (en) * 2016-05-31 2017-12-06 Daikin Industries, Limited Apparatus for space heating and warm water supply
GR20170100077A (en) * 2017-02-20 2018-10-31 Νεκταριος Παναγιωτη Ταλιαδουρος Dual-energy heat pump
IT201800009760A1 (en) * 2018-10-24 2020-04-24 Adsum S.R.L. System and method for heating a fluid using a heat pump and a boiler
NL2022705B1 (en) * 2019-03-08 2020-09-17 Dejatech Holding B V Hybrid central heating boiler with heat pump and method for controlling a central heating boiler with a heat pump
GB2584190A (en) * 2019-03-06 2020-11-25 Bosch Gmbh Robert Method for controlling a heat device

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KR101534813B1 (en) * 2013-10-15 2015-07-08 한국생산기술연구원 Apparatus for Withdrawing the Exhaust Heat of a Boiler using Thermo-syphon
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GB2509354A (en) * 2012-10-05 2014-07-02 Lobils Ltd Apparatus to heat domestic hot water and water for a space heating system
GB2518471A (en) * 2013-09-23 2015-03-25 Clk Corp Hybrid heat pump boiler system
GB2518471B (en) * 2013-09-23 2016-10-19 Clk Corp Hybrid heat pump boiler system
GB2533981A (en) * 2015-03-16 2016-07-13 Clk Corp Hybrid heat pump boiler system
GB2533981B (en) * 2015-03-16 2016-11-30 Clk Corp Hybrid heat pump boiler system
CN105650850A (en) * 2016-02-22 2016-06-08 吉首大学 Heat supply system of biomass boiler
CN105716271A (en) * 2016-02-22 2016-06-29 吉首大学 Exhaust heat recovery and dust removal integrated biomass boiler heating system
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IT201800009760A1 (en) * 2018-10-24 2020-04-24 Adsum S.R.L. System and method for heating a fluid using a heat pump and a boiler
GB2584190A (en) * 2019-03-06 2020-11-25 Bosch Gmbh Robert Method for controlling a heat device
NL2022705B1 (en) * 2019-03-08 2020-09-17 Dejatech Holding B V Hybrid central heating boiler with heat pump and method for controlling a central heating boiler with a heat pump

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