KR101380555B1 - Hybrid Heat Pump Boiler System - Google Patents

Abstract

The present invention relates to a hybrid heat pump boiler system capable of a multipurpose high-efficiency system capable of both space cooling, heating, floor heating, and four-season hot water supply as one system.
The present invention is a hybrid heat pump boiler system in which an outdoor unit (200) connected to an indoor unit (100) to form a heat pump, a water tank unit (300) and a boiler unit (400)
The outdoor unit 200, the compressor 210 for compressing the refrigerant at a high temperature, high pressure; A four-way valve (220) for changing a flow path of the refrigerant discharged from the compressor (210); A hot water heat exchanger (230) for exchanging heat with the water in the water tank unit (300) while passing through the four - way valve (220); A first and second expansion valves 240 and 280 for allowing the refrigerant flowing through the hot water heat exchanger 230 to be reduced in pressure and temperature; A fan coil unit 250 for allowing the refrigerant passing through the first expansion valve 240 to pass therethrough; A circulation pipe 253 which allows the exhaust pipe 470 to be circulated through the heat exchanger 252 of the fan coil unit 250 while allowing the exhaust pipe 470 to recover waste heat from the exhaust gas from the boiler unit 400. It is made of a waste heat recovery heat exchanger (291) to be connected,
The water tank unit 300,
A heat storage tank (310) having circulation pipes (330) and (340) for circulating water through the hot water heat exchanger (230) of the outdoor unit (200); A heating water heat exchanger 320 connected to the return pipe 520 connected to the connection pipe 510 to return the heating water to the boiler unit 400; .

Description

Hybrid Heat Pump Boiler System

The present invention relates to a hybrid heat pump boiler system, and more specifically, it is possible to solve the problem of winter outdoor unit by recovering the waste heat of the boiler unit while allowing space cooling, heating, floor heating, and hot water supply in all seasons in one system. It is to enable a multi-purpose high efficiency system.

In general, a heat pump system is a cooling and heating device that transfers a low temperature heat source to a high temperature or a high temperature heat source to a low temperature by using heat of a refrigerant or heat of condensation.

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

However, in a case where the heat pump system is used for heating, in the winter season when the temperature of outdoor air is low, the heating efficiency is drastically lowered due to a conception problem, or a sufficient heating or hot water supply operation can not be provided.

In order to solve the problems of such a heat pump system, a cooling / heating system in which hot water is supplied has been proposed.

Conventionally, a heating / cooling heat pump to which hot water is supplied is designed to additionally supply hot water in addition to cooling and heating, thereby greatly improving the usability. However, since the supply of hot water is not smoothly performed and the cooling efficiency decreases during hot- And the like.

Republic of Korea Patent No. 10-877055 Republic of Korea Patent No. 10-877056

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a heat pump, a boiler unit and a water tank unit, (Indoor / outdoor air heat, boiler exhaust heat) to achieve optimal efficiency by combining the advantages of boiler and heat pump and to provide floor heating and seasonal hot water supply, And the floor heating can be selectively or simultaneously performed, and the exhaust gas waste heat of the boiler unit can be recovered to solve the problem of the heat exchanger of the fan coil unit of the outdoor unit of the winter season.

According to an aspect of the present invention, there is provided a hybrid heat pump boiler system including an outdoor unit connected to an indoor unit to form a heat pump, a water tank unit and a boiler unit,

The outdoor unit includes:

A compressor for compressing the refrigerant at high temperature and high pressure; Four-way valve for changing the flow path of the refrigerant discharged from the compressor; A hot water heat exchanger for exchanging heat with the water of the water tank unit while the refrigerant passing through the four-way valve passes; A first and second expansion valves for allowing the refrigerant passing through the hot water heat exchanger to be reduced in pressure and temperature; A fan coil unit for allowing the refrigerant passing through the first expansion valve to pass therethrough; It is made of a waste heat recovery heat exchanger is connected to the circulation pipe to be circulated while passing through the heat exchanger of the fan coil unit while passing through the exhaust pipe to recover the waste heat by the exhaust gas from the boiler unit,

The water tank unit,

A heat storage tank having a circulation pipe for circulating water through the hot water heat exchanger of the outdoor unit; And a heating water heat exchanger which is connected to the connection pipe and connected to a water return pipe for returning the heating water to the boiler unit while being connected to the connection pipe.

The first expansion valve is provided in a connection pipe connected from the four-way valve through the hot water heat exchanger to the fan coil unit, and the second expansion valve is provided on the connection pipe connected to the indoor unit.

In addition, two three-way valves are provided on the connection pipe between the four-way valve and the hot water heat exchanger, and one of the three-way valves is connected to a connection pipe through the indoor heat exchanger of the indoor unit, and the other three- And is connected to the bypass pipe connected to the four-way valve bypassed from the connection pipe.

In addition, a bypass pipe connected to the connection pipe connected to the fan coil unit is formed in the connection pipe.

The bypass pipe is provided with a three-way valve located at the tip of the fan coil unit. The connection pipe through the indoor unit and the hot water heat exchanger are connected to the three-way valve through the branch pipe to connect the fan coil unit And are connected to each other.

The bypass pipe bypassed from the connection pipe and connected to the four-way valve and the bypass pipe bypassed from the connection pipe and connected to the connection pipe connected to the fan coil unit are connected to each other through a connection pipe So that the refrigerant is moved to the compressor in the heating mode.

In addition, the boiler unit is connected to a floor heating unit for circulating the heating water to make the floor heating.

Also, the three-way valve is provided on the circulation pipe, and the bypass pipe is bypassed from the circulation pipe and connected to the three-way valve via the heating water heat exchanger.

At the branch point to the circulation pipe and the bypass pipe, the water discharge from the heat storage tank passes through the hot water heat exchanger, and then the three-way valve is configured to selectively or simultaneously flow into the heating water heat exchanger or heat storage tank.

Also, a three-way valve is provided on the water return pipe, and a bypass pipe connected to the bottom heating part is connected to the three-way valve.

In addition, the boiler unit is connected to an inlet pipe and an outlet pipe, which are connected to the heat storage tank and discharged through the second heat exchanger in the boiler unit.

In addition, the inlet pipe is provided with a three-way valve connected to the discharge pipe is a structure that can be used to directly take out the water of the heat storage tank to hot water without passing through the boiler unit.

In addition, the waste heat recovery heat exchanger is a structure in which a part of the heating water from the boiler unit is bypassed and connected to the connection pipe to be re-introduced into the boiler unit again through the return pipe.

The circulation pipe has a structure in which a storage tank in which the fluid is stored and a circulation pump allowing the fluid to move in the circulation pipe.

In addition, the storage tank has a structure in which an antifreeze is stored as a fluid to circulate in the circulation pipe.

As described above, the present invention can be miniaturized by integrally configuring the heat pump and the boiler unit and the water tank unit, which can be utilized in space, easy to install in an existing house, and hassle of installing the boiler unit and the heat pump separately. Will be avoided.

In addition, the present invention can provide space cooling, heating, floor heating and four seasons hot water supply, it is possible to improve the optimal overall efficiency by the optimum operating combination of the heat pump and the boiler according to the outside temperature.

Further, the present invention has the effect of selectively or simultaneously performing the space heating and the floor heating.

Further, the present invention maximizes the performance of the heat pump by recovering the waste heat generated by the exhaust gas generated from the boiler, and solves the problem of the winter season so that the operation time of the boiler using only the conventional fossil fuel can be reduced, It is possible to reduce carbon dioxide emissions and to provide it as an environmentally friendly system.

Further, the present invention can recover the condensation heat in the cooling mode and use it as hot water.

In addition, the hybrid heat pump boiler system according to the present invention can be configured as a parallel module type and can be fully utilized for a large capacity.

Further, the present invention is capable of smart operation functions such as total energy priority operation, carbon dioxide emission priority operation, energy cost priority operation, and power peak avoidance operation.

FIG. 1 is a configuration diagram of a system according to an embodiment of the present invention, showing a case of a heating mode.
FIG. 2 is a configuration diagram illustrating a cooling mode in the state of FIG. 1. FIG.

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

In describing the specific contents of the present invention, it is to be noted that the system used is a term indicating a device, not a method.

1 is a configuration diagram of a system according to an embodiment of the present invention, which shows a case of heating mode and hot water (hot water).

As shown in the figure, the hybrid heat pump boiler system 1 according to an embodiment of the present invention, the outdoor unit 200, the water tank unit 300 and the boiler associated with the indoor unit 100 constituting the heat pump It is composed of a unit 400.

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

The outdoor unit 200 includes a compressor 210 for compressing the refrigerant at a high temperature and a high pressure, a four-way valve 220 for changing the flow rate of the refrigerant discharged from the compressor 210, A hot water heat exchanger 230 for exchanging heat with the water in the water tank unit 300 while passing the refrigerant passing through the hot water heat exchanger 230 and a first expansion valve 240 for reducing the pressure of the refrigerant passing through the hot water heat exchanger 230, And a fan coil unit 250 for allowing the refrigerant passing through the first expansion valve 240 to pass therethrough.

The refrigerant passing through the fan coil unit 250 flows into the compressor 210 via the four-way valve 220, thereby completing one cycle.

The fan coil unit 250 includes a blower 251 and a heat exchanger 252, and is a heat exchanger that allows heat exchange while the refrigerant passing through the first expansion valve 240 passes.

The indoor heat exchanger 110 of the indoor unit 100 is connected to the outdoor unit 200 through the connection pipes 111 and 112 so that the room is cooled and heated.

In addition, the present invention is connected to the fan coil unit 250 through the hot water heat exchanger 230 from the four-way valve 220 through the connection pipes 260 and 270, and the four-way valve 220 and the hot water heat exchange The three-way valves 261 and 262 are provided on the connection pipe 260 between the indoor unit 100 and the indoor unit 100. The three-way valve 261 is connected to the indoor heat exchanger 110 of the indoor unit 100, And the other three-way valve 262 is connected to the bypass pipe 263 bypassed from the connection pipe 260 and connected to the four-way valve 220.

The three-way valve 262 is to selectively change the flow path of the refrigerant in accordance with the mode (cooling, heating mode) toward the hot water heat exchanger 230 and the four-way valve 220.

A bypass pipe 271 connected to the connection pipe 112 connected to the fan coil unit 250 is formed in the connection pipe 270.

The bypass pipe 271 is provided with a three-way valve 272 positioned at the tip of the fan coil unit 250. The three-way valve 272 is connected to a connection pipe 112 through the indoor unit 100, The connection pipe 270 passing through the hot water heat exchanger 230 is connected through the branch pipe 273 and passes through the fan coil unit 250.

The bypass pipe 271 is provided with a valve 271a for controlling the flow path of the refrigerant.

The connection pipe 270 is provided with a check valve 274 at the next position of the first expansion valve 240.

A bypass pipe 277 is connected to the connection pipe 111 connected to the indoor unit 100 while being connected to the three-way valve 272 of the bypass pipe 271.

The bypass pipe 263 and the bypass pipe 271 are connected to each other through a connection pipe 275. A check valve 276 is provided on the connection pipe 275 to regulate the passage of the refrigerant.

The connection pipe 112 passing through the indoor heat exchanger 110 of the indoor unit 100 is connected to the fan coil unit 250 of the outdoor unit 200. On the connection pipe 112, (280).

Further, an accumulator 290 is provided between the four-way valve 220 and the compressor 210.

In addition, the water tank unit 300 includes a heat storage tank 310 and a heating water heat exchanger 320.

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

In addition, the present invention is equipped with a floor heating unit 500 for circulating the heating water from the boiler unit 400 to make the floor heating.

In addition, in addition to the floor heating unit 500 may be configured to circulate the heating water by connecting to a radiator (not shown).

The heat storage tank 310 of the water tank unit 300 is connected to the heat storage tank 310 through the hot water heat exchanger 230 of the outdoor unit 200 to circulate water through the circulation pipes 330 and 340 Respectively.

A three-way valve 331 is provided on the circulation pipe 330. The three-way valve 331 is connected to the bypass pipe 331 bypassed from the circulation pipe 340 via the heating water heat exchanger 320, (341) and (342).

A three-way valve 343 is provided at a branch point between the circulation pipe 340 and the bypass pipe 341.

The three-way valve 343 sends the water traveling through the circulation pipe 340 only to the heating water heat exchanger 320 or a part of the water to the heating water heat exchanger 320, (310). ≪ / RTI >

In other words, the hot water passing through the hot water heat exchanger 230 in the three-way valve 343 heats the heating water which is heat-exchanged in the heating water heat exchanger 320 by heating water, or the heating water which flows into the heat storage tank 310, The user can simultaneously or selectively perform the operation of performing the operation.

In addition, a relief valve 344 is disposed on the upper part of the thermal storage tank 310 so that pressure can be discharged when a high pressure is formed inside the storage tank 310.

A water supply pipe 311 is connected to a lower portion of the heat storage tank 310 and a pressure reducing valve 312 is provided on the water supply pipe 311. A drain pipe 313 for draining water in the heat storage tank 310 ).

A circulation pump 332 for circulating water in the heat storage tank 310 is provided on the circulation pipe 330.

The heating water heat exchanger 320 is provided with a connection pipe 510 connected to the bottom heating unit 500. The connection pipe 510 is connected to the boiler unit 400 through a heating water heat exchanger 320, To the water return pipe 520 for allowing the heating water to be recirculated.

In addition, the connection pipe 510 has a structure provided with a pump 512.

In addition, a three-way valve 521 is provided on the return pipe 520, and the three-way valve 521 is provided with a bypass pipe 522 connected to the floor heating part 500.

The inflow pipe 450 and the discharge pipe 460 are connected to the boiler unit 400 through the second heat exchanger 430 in the boiler unit 400 while being connected to the heat storage tank 310.

The three-way valve 451 is provided on the inlet pipe 450, and a part of the discharge pipe 460 is bypassed and connected to the three-way valve 451.

The expansion tank 440 in the boiler unit 400 is connected to a heating water inflow pipe 441 through which the heating water is returned through the water return pipe 520 and the heating water inflow pipe 441 through the first heat exchanger 420, And supply pipes 442 and 443 for supplying the heating water to the floor heating unit 500 through the bypass pipe 522 and the bypass pipe 522 are connected.

On the one supply pipe 442 is provided with a pump 444 for circulation, supply of heating water.

The three-way valve 445 is connected to the bypass piping 446 connected to the return pipe 520 through the second heat exchanger 430, Respectively.

In addition, a branch pipe 447 is disposed at a point where the return pipe 520 and the bypass pipe 446 meet to join together.

Here, according to an embodiment of the present invention, the waste heat of the exhaust gas discharged from the boiler unit 400 may be recovered and utilized, and the boiler unit 400 may be installed on the upper side (or side, etc.) and is not limited to the position. Exhaust pipe 470 is connected to the exhaust port 401 formed in the () so that the exhaust gas from the exhaust port 401 is discharged through the waste heat recovery heat exchanger (291) provided in the outdoor unit (200).

In addition, the waste heat recovery heat exchanger 291 has a structure in which the connecting pipe 524 bypassed from the return pipe 520 passes (B direction) and is connected to the return pipe 520 again to join the heating water.

In addition, a circulation pipe 253 which passes through the heat exchanger 252 constituting the fan coil unit 250 on the outdoor unit 200 side and passes through the waste heat recovery heat exchanger 291 is provided.

On the circulation pipe 253 is provided with a storage tank 254 for storing the fluid, and a circulation pump 254 for allowing the fluid to move in the circulation pipe 253.

In this embodiment, the fluid is circulated in the circulation tube 253 as an antifreeze.

1, 2, 3, and 4 shown in the waste heat recovery heat exchanger 291 indicate the connection state of the circulation pipe 253, for convenience of the drawings, the first and fourth parts are connected, It means that 2 and 3 are connected. That is, the circulation pipe 253 is connected in the order of 1 → 2 → 3 → 4 → 1.

The operation of the hybrid heat pump boiler system according to an embodiment of the present invention having such a configuration will be described below in the heating and cooling modes.

[Heating mode]

As shown in FIG. 1, according to an embodiment of the present invention, space heating and floor heating can be selectively performed. In the floor heating, the indoor unit 100 is operated in a state where the outdoor unit 200, The unit 300 and the boiler unit 400 are operated.

The high temperature and high pressure refrigerant discharged from the compressor 210 moves to the hot water heat exchanger 230 via the connection pipe 260 through the four-way valve 220. [

 Passes through the first expansion valve 240 through the connection pipe 270 while passing through the hot water heat exchanger 230 and flows through the connection pipe 275 and the second expansion valve 250 through the fan coil unit 250 and the three- The refrigerant passes through the four-way valve 220 and then flows into the compressor 210 via the accumulator 290 to form one cycle.

At this time, the valve 271a provided on the bypass pipe 271 is closed.

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

In other words, since the refrigerant of high temperature and high pressure flows through the hot water heat exchanger 230 through the connection pipe 260, the refrigerant of the circulation pipe 330 is exchanged with the water discharged from the heat storage tank 310, (Hot water) in this state is passed through the heating water heat exchanger 320 through the bypass pipe 341 via the three-way valve 343, and then the water And then flows through the three-way valve 331 again to the circulation pipe 330 through the bypass pipe 342. [

The heating water flowing from the expansion tank 440 of the boiler unit 400 through the first heat exchanger 420 is supplied to the bottom heating unit 500 through the supply pipe 523 and the bypass pipe 522 The heating water passing through the bottom heating unit 500 is passed through the connection water pipe 510 through the heating water heat exchanger 320 by the pump 512, To the expansion tank (440) of the boiler unit (400).

At this time, the temperature of the heating water passing through the bottom heating section 500 is lowered, and the temperature is raised while passing through the heating water heat exchanger 320.

In other words, the water from the heat storage tank 310 passes through the hot water heat exchanger 320 through the hot water heat exchanger 230 of the outdoor unit 200 to obtain a heat source. And then flows into the boiler unit 400 through the water return pipe 520 in a state where the heat is exchanged with the rough heating water and the low temperature heating water is heated.

The hot water flowing through the hot water heat exchanger 230 on the outdoor unit 200 side of the heat pump is heat-exchanged in the hot water heat exchanger 320. When the amount of hot water is sufficient, The air is not introduced into the unit 400 but flows through the three-way valve 521 directly to the bottom heating unit 500 through the bypass pipe 522 so that the floor heating is performed.

In addition, when the hot water passing through the hot water heat exchanger 230 is insufficient heat in the process of heat exchange in the heating water heat exchanger 320, the heating water flowing through the connection pipe 510 to the inside of the boiler unit 400. Inflow and heating, and then to come out again to pass through the floor heating unit 500 through the supply pipe 523 to perform the floor heating.

Thus, the gas consumption consumed in heating the water by the boiler unit 400 for floor heating or hot water supply can be reduced.

On the other hand, when hot water is to be used, water is introduced into the boiler unit 400 through the inflow pipe 450, the second heat exchanger 430, and then the boiler unit 400 The high-temperature hot water is discharged through the discharge pipe 460 connected to the outside of the hot water pipe 460, and hot water can be used.

The water in the storage tank 310 is bypassed from the inflow pipe 450 to the discharge pipe 460 through the three-way valve 451 without passing through the boiler unit 400 when the hot water temperature of the storage tank 310 is sufficient. So that it can be used as hot water.

In the second heat exchanger 430 in the boiler unit 400, the high-temperature water (which is heated due to the heating by the burner 410) passes through the first heat exchanger 420 and flows through the supply pipe 443 Is supplied to the bottom heating unit 500 and is branched through the three-way valve 445 and passed through the branch pipe 447 via the second heat exchanger 430 via the bypass pipe 446, And then flows into the expansion tank 440 through the pipe 441. In this process, the water from the storage tank 310 is heated through the second heat exchanger 430 to become hot water.

Here, the present invention can be used to recover the waste heat of the exhaust gas generated during the operation of the boiler unit 400, the exhaust gas from the exhaust port 401 of the boiler unit 400 flows into the exhaust pipe 470 The exhaust gas is exhausted through the waste heat recovery heat exchanger 291 in the outdoor unit 200.

At this time, the water coming from the boiler unit 400 is moved through the connection pipe 524 through the waste heat recovery heat exchanger (291) and joined again through the return pipe 520 is re-introduced into the boiler unit 400. In the waste heat recovery heat exchanger (291), the waste heat of the exhaust gas from the exhaust port (401) of the boiler unit (400) and the water from the boiler unit (400) are heat-exchanged by reheating through the return pipe (520). By flowing in, the gas consumption of the boiler unit 400 can be reduced.

In addition, when the outside air intake air temperature drops below zero in winter, and the fins of the heat exchanger 252 are implanted, the antifreeze flowing into the circulation pipe 253 passes through the waste heat recovery heat exchanger 291, and thus the boiler unit 400 By passing through the heat exchanger 252 of the fan coil unit unit 250 in the state of being heated by the waste heat of the exhaust gas of), the non-defrosting (defrosting function) of the heat exchanger 252 is possible.

If the waste heat temperature due to the exhaust gas from the boiler unit 400 is so low that it is difficult to perform the defrosting function, it is not possible to provide a sufficient heat source to the refrigerant flowing through the connection pipe 265 passing through the waste heat recovery heat exchanger 291. Since a part of the heating water coming from the boiler unit 400 through the supply pipe 523 is bypassed and passes through the waste heat recovery heat exchanger 291 through the connection pipe 524 (in the direction of Fig. B), the circulation pipe Since the antifreeze flowing through the (253) is provided with a heat source of the heating water and the heat source of the waste heat of the boiler unit 400 passes through the heat exchanger 252 of the fan coil unit unit 250 in a state where the temperature is sufficiently increased. It is possible to fully exhibit the defrosting function to prevent the frosting of the heat exchanger 252 constituting the fan coil unit 250 of the winter outdoor unit 200 side from occurring.

On the other hand, when the space heating is desired, the flow path of the three-way valve 261 on the connection pipe 260 is changed so that the refrigerant is sent to the connection pipe 111 on the side of the indoor unit 100, Through the heat exchanger 252 of the fan coil unit 250 of the outdoor unit 200 through the connection pipe 112. The four-way valve 210 is connected to the indoor heat exchanger 110, And then flows into the compressor 210 through the compressor 220 again.

[Cooling mode]

2, the high-temperature and high-pressure refrigerant discharged from the compressor 210 in the outdoor unit 200 flows toward the bypass piping 263 through the four-way valve 220. In this case, Water heat exchanger (230) by a three-way valve (262).

The refrigerant passing through the hot water heat exchanger 230 passes through the three-way valve 272 through the bypass pipe 271 and flows through the heat exchanger 252 of the fan coil unit 250 to the second expansion valve 280, Through the indoor heat exchanger 110 of the indoor unit 100 through the connection pipe 112.

The high-temperature and high-pressure refrigerant passing through the heat exchanger 252 and the second expansion valve 280 of the fan coil unit 250 is converted into low-temperature and low-pressure refrigerant to be supplied to the indoor heat exchanger 110 of the indoor unit 100, The refrigerant is passed through the connection pipe 111 through the three-way valve 261 and then through the connection pipe 260 to the four-way valve 220 and the accumulator 290 And flows into the compressor (21).

In the case of the cooling mode, it is mainly a summer, and the boiler unit 400 is in a non-operating state.

However, a part of the refrigerant heat source of the outdoor unit 200 is supplied to the heat storage tank 310 of the water tank unit 300, and it can be utilized as hot water.

In other words, the hot water heat exchanger 230 provided at the outdoor unit 200 passes through the high-temperature, high-pressure refrigerant discharged from the compressor 210. At this time, water from the heat storage tank 310 flows into the circulation pump 332 The heat source is taken from the high temperature and high pressure refrigerant through the hot water heat exchanger 230 through the circulation pipe 330 and is supplied again to the heat storage tank 310 through the circulation pipe 340 in a state of being heated up again, It is possible.

That is, hot water can provide a system that can be used throughout the year.

In the cooling mode according to the embodiment of the present invention, when the refrigerant is sufficiently condensed in the hot water heat exchanger 230, the refrigerant flows from the three-way valve 272 to the heat exchanger (not shown) of the fan coil unit 250 The air is passed through the bypass pipe 277 through the second expansion valve 280 and the connection pipe 112 so as to pass through the indoor heat exchanger 110 of the indoor unit 100. Thus, .

In the meantime, according to the present invention, the heat pump and the boiler unit can be brought into an optimum operation state according to the outside air temperature. For example, when the outside air temperature is 3 ° C or higher, the heat pump is operated alone. Combination operation is performed, and when the outside air temperature is lower than -13 ° C, the boiler is operated alone.

The operating conditions of the outside air temperature are not limited to these, and the outside air temperature conditions may be different depending on the situation.

Further, the present invention is capable of a smart driving function. Total energy priority operation, carbon dioxide emission priority operation, energy cost priority operation, and power peak avoidance operation.

In other words, the integrated energy priority operation compares the operating efficiency of the heat pump and the boiler unit according to the outside temperature. For example, when the outside temperature is 3 ° C or higher, the heat pump is operated alone. The heat pump is operated first, and in case of insufficient load, the combined operation of auxiliary operation of the boiler unit is performed.

In addition, the boiler is operated alone at an outside temperature of −13 ° C. or lower.

In addition, CO2 emissions priority operation is to operate a heat pump with a small amount of carbon dioxide in the region that regulates carbon dioxide generation.

In addition, the energy-cost-priority operation is to selectively operate the boiler and the heat pump so as to minimize the cost per calorie by comparing the electric charge and the gas charge per unit calorie.

In addition, in the power peak avoidance operation, when there is a power peak limitation, the boiler priority operation is performed to avoid the power peak.

In other words, hot water can provide a system that can be used all four seasons.

According to the present invention, the heat pump, the boiler unit, and the water tank unit may be integrally formed to reduce the size of the heat pump. If the installation space is restricted, the heat storage tank of the water tank unit may be separately installed.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. It will be possible. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: hybrid heat pump boiler system
100: indoor unit
110: indoor heat exchanger
111,112: Connection piping
120: blower
200: outdoor unit
210: compressor
220: 4-way valve
230: Hot Water Heat Exchanger
240: first expansion valve
250: Fan coil unit part
251: Blower
252: heat exchanger
253: circulation pipe
254: storage tank
255: circulation pump
260: Connection piping
261,262: Three-way valve
263: Bypass piping
264: branch pipe
270: Connection piping
271: Bypass piping
271a: valve
272: Three-way valve
273: branch tube
274: Check valve
275: Connection piping
276: Check valve
277: Bypass piping
280: second expansion valve
290: Accumulator
291: Waste Heat Recovery Heat Exchanger
300: water tank unit
310: heat storage tank
311: Water supply piping
312: Pressure reducing valve
313: drain pipe
320: Heating water heat exchanger
330: Circulation piping
331: Three-way valve
332: circulation pump
340: Circulation piping
341,342: Bypass piping
343: Three-way valve
400: boiler unit
401: Exhaust
410: Burner
420: first heat exchanger
430: second heat exchanger
440: expansion tank
441: Heating water inflow pipe
442, 443:
444: Pump
445: Three-way valve
446: Bypass piping
447: branch pipe
450: inlet piping
451: Three-way valve
460: discharge pipe
470: Exhaust pipe
500: floor heating unit
510: Connection piping
512: pump
520: Water piping
521: Three-way valve
522: Bypass piping
523: Supply piping
524: Connection piping

Claims (16)

As a hybrid heat pump boiler system in which the outdoor unit 200 and the water tank unit 300 and the boiler unit 400 are integrally connected to the indoor unit 100 to form a heat pump,
The outdoor unit 200,
A compressor 210 for compressing the refrigerant at high temperature and high pressure;
A four-way valve (220) for changing a flow path of the refrigerant discharged from the compressor (210);
A hot water heat exchanger (230) for exchanging heat with the water in the water tank unit (300) while passing through the four - way valve (220);
A first and second expansion valves 240 and 280 for allowing the refrigerant flowing through the hot water heat exchanger 230 to be reduced in pressure and temperature;
A fan coil unit 250 for allowing the refrigerant passing through the first expansion valve 240 to pass therethrough;
A circulation pipe allowing the fluid to circulate while passing through the heat exchanger 252 of the fan coil unit 250 while passing through the exhaust pipe 470 for recovering the waste heat by the exhaust gas from the boiler unit 400. A waste heat recovery heat exchanger (291) is connected to (253),
The water tank unit 300,
A heat storage tank (310) having circulation pipes (330) and (340) for circulating water through the hot water heat exchanger (230) of the outdoor unit (200);
A heating water heat exchanger 320 connected to the return pipe 520 connected to the connection pipe 510 to return the heating water to the boiler unit 400; Wherein the boiler system is a boiler.
The method according to claim 1,
The first expansion valve 240 is provided in the connection pipe 270 connected to the fan coil unit 250 from the four-way valve 220 through the hot water heat exchanger 230, and the second expansion valve 280, Is installed on a connection pipe (112) connected to the indoor unit (100).
The method of claim 2,
Two three-way valves 261 and 262 are provided on the connection pipe 260 between the four-way valve 220 and the hot water heat exchanger 230, and one of the three-way valves 261 includes an indoor unit 100. Is connected to the connection pipe 111 passing through the indoor heat exchanger 110 of the other, and the other three-way valve 262 is bypassed from the connection pipe 260 and connected to the four-way valve 220 Hybrid heat pump boiler system, characterized in that connected to (263).
The method of claim 3,
Wherein the bypass pipe (271) is connected to the connection pipe (112) connected to the fan coil unit (250) by being bypassed to the connection pipe (270).
The method of claim 4,
The bypass pipe 271 is provided with a three-way valve 272 positioned at the tip of the fan coil unit 250. The three-way valve 272 is connected to a connection pipe 112 through the indoor unit 100, And a connection pipe 270 passing through the hot water heat exchanger 230 is connected through the branch pipe 273 and is connected to the fan coil unit 250 through the pipe.
The method of claim 5,
A bypass pipe 263 connected to the four-way valve 220 by being bypassed from the connection pipe 260 and a bypass pipe 263 bypassed from the connection pipe 270 and connected to the fan coil unit 250 The bypass pipe 271 connected to the bypass pipe 271,
Are connected to each other through a connection pipe (275), so that the refrigerant is allowed to move to the compressor (210) in the heating mode.
The method of claim 6,
And a bypass pipe 277 is connected between the three-way valve 272 of the bypass pipe 271 and the connection pipe 111 connected to the indoor unit 100. The hybrid heat pump boiler system according to claim 1, .
The method of claim 7,
Wherein the boiler unit (400) is connected to a floor heating unit (500) for circulating the heating water so that the floor heating is performed.
The method of claim 8,
The three-way valve 331 is provided with a bypass pipe 341 bypassed from the circulation pipe 340 and connected to the heating water heat exchanger 320, (342) is provided in the boiler system.
The method of claim 9,
The water from the storage tank 310 flows into the heating water heat exchanger 320 or the storage tank 310 after passing through the hot water heat exchanger 230 at a branching point position to the circulation pipe 340 and the bypass pipe 341 And a three-way valve (343) for selectively or simultaneously performing the heat pump operation.
The method of claim 10,
A three-way valve 521 is provided on the water return pipe 520 and a bypass pipe 522 connected to the bottom heating part 500 to supply the heating water to the three-way valve 521 is provided Features a hybrid heat pump boiler system.
The method of claim 11,
The boiler unit 400 is connected to the inflow pipe 450 and the discharge pipe 460 which are connected to the heat storage tank 310 and are discharged through the second heat exchanger 430 in the boiler unit 400 Hybrid heat pump boiler system.
The method of claim 12,
A three-way valve 451 connected to the discharge pipe 460 is provided on the inflow pipe 450 so that the water in the heat storage tank 310 can be taken out into the hot water without passing through the boiler unit 400, A hybrid heat pump boiler system.
The method according to claim 1,
The waste heat recovery heat exchanger (291) is connected to the pipe 524 so that a portion of the heating water from the boiler unit 400 is bypassed and passed back to the boiler unit 400 through the return pipe 520 again. Hybrid heat pump boiler system, characterized in that further connected.
The method according to claim 1,
The circulation pipe 253 is a hybrid heat pump boiler system, characterized in that the storage tank for storing the fluid 254 and the circulation pump 255 for allowing the fluid to move in the circulation pipe (253).
16. The method of claim 15,
The storage tank 254 is a hybrid heat pump boiler system, characterized in that the antifreeze is stored as a fluid to circulate in the circulation pipe (253).

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