KR20150114219A - A system for supplying hot water - Google Patents

Abstract

The present invention relates to a system to supply hot water. According to the embodiment of the present invention, a system to supply hot water comprises: a heat pump device operated with a cooling cycle, having a condenser which receives a first circulation water and an evaporator which is a second circulation water; a supply unit which supplies supply water to be heat-exchanged with the first circulation water; supply water supplied from the supply unit, a use heat exchanger which heat-exchanges with the first circulation water; a use place which receives supply water passing through the use heat exchanger, performing a set process; a heat source heat exchanger which performs heat exchange between waste water generated with the second circulation water; and a circulation connection pipe which receives waste water passing through the heat source heat exchanger, recirculating waste water to the heat source heat exchanger.

Description

[0001] A system for supplying hot water [

The present invention relates to a hot water supply system.

The hot water supply system is understood as a system for supplying fluid to a place where a predetermined process is performed using a fluid.

The hot water supply system may include an apparatus that recovers waste heat from the waste fluid after performing the predetermined process.

Figure 1 shows a conventional hot water supply system.

Referring to FIG. 1, a conventional hot water supply system 1 includes a use place 2 using a fluid and a heat exchanger 3 for heating a fluid to be supplied to the place of use 2.

The hot water supply system 1 is provided with a supply line 4 for guiding the fluid to the heat exchanger 3 and an inflow line 5 for guiding the fluid heated in the heat exchanger 3 to the place of use 2, . The supply line 4 extends from the fluid source 4a to the heat exchanger 3 and a first pump 8 may be installed in the inflow line 5.

The hot water supply system 1 is provided with a discharge line 6 for discharging the waste fluid used in the place of use 2, that is, after a predetermined process is performed, and a discharge line 6 for heat- And a discharge line 7 for discharging the liquid. The discharge line 6 extends from the place of use 2 to the heat exchanger 3 and the discharge line 7 extends from the heat exchanger 3 to the discharge tank 7a. A second pump 9 may be installed in the discharge line 7.

The heat exchanger 3 allows heat exchange between the supply fluid introduced through the supply line 4 and the waste fluid introduced from the discharge line 6.

According to the conventional hot water supply system having such a configuration, when heat exchange efficiency is not high due to the direct heat exchange between the supply fluid and the waste fluid, and the temperature at which the supply fluid is formed after heat exchange does not reach a desired temperature There is a problem in that a heating source of a heater is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot water supply system with improved heat exchange efficiency.

The hot water supply system according to an embodiment of the present invention includes a heat pump device in which a refrigeration cycle is operated and a condenser into which the first circulating water flows and an evaporator into which the second circulating water flows; A use-side heat exchanger in which heat exchange is performed between the supply water supplied from the supply source and the first circulation water; A heat source side heat exchanger for exchanging heat between the waste water generated in the use place and the second circulation water by supplying the supply water having passed through the use side heat exchanger; And a circulation connection pipe through which the waste water having passed through the heat source side heat exchanger is introduced and the waste water is recirculated to the heat source side heat exchanger.

The apparatus further includes a discharge vessel extending from the circulation connection pipe and discharging at least a portion of the wastewater flowing through the circulation connection pipe.

The use-side heat exchanger includes a first use-side heat exchanger and a second use-side heat exchanger.

A supply pipe extending from the supply source and guiding the flow of the supply water; A first supply branch pipe branched from the supply pipe and extending to the first use-side heat exchanger; And a second supply branch pipe branched from the supply pipe and extending to the second use-side heat exchanger.

A first use side bypass pipe extending from the first supply branch pipe to the inlet side of the use destination to allow the supply water to bypass the first use-side heat exchanger; And a second use-side bypass pipe extending from the second supply branch pipe to an inlet side of the use destination, the supply use water bypassing the second use-side heat exchanger.

A first use-side valve installed in the first supply branch pipe; A second use-side valve installed in the second supply branch pipe; A third use-side valve installed in the first use-side bypass pipe; And a fourth use-side valve installed in the second use-side bypass pipe.

Further, when the first and fourth use-side valves are closed and the second and third use-side valves are opened, the supply water flow direction in the first use-side heat exchanger is switched in the reverse direction to clean the foreign matter clogging .

Further, when the second and third use-side valves are closed and the first and fourth use-side valves are opened, the supply water flow direction in the second use-side heat exchanger is switched in the reverse direction to clean the foreign matter clogging .

The heat source side heat exchanger includes a first heat source side heat exchanger and a second heat source side heat exchanger.

A wastewater pipe for guiding the flow of the wastewater generated in the use area; A first wastewater branch pipe branched from the waste water pipe and extending to the first heat source side heat exchanger; And a second waste water branch pipe branched from the waste water pipe and extending to the second heat source side heat exchanger.

A first heat source side bypass pipe extending from the first wastewater branch pipe to the inflow side of the circulation connecting pipe to allow waste water to bypass the first heat source side heat exchanger; And a second heat source side bypass pipe extending from the second wastewater branch pipe to the inflow side of the circulation connection pipe for allowing the wastewater to bypass the second heat source side heat exchanger.

A first heat source side valve installed in the first waste water branch pipe; A second heat source side valve installed in the second wastewater branch pipe; A third heat source side valve installed on the first heat source side bypass pipe; And a fourth heat source side valve installed in the second heat source side bypass pipe.

In addition, when the first and fourth heat source side valves are closed and the second and third heat source side valves are opened, the flow direction of the wastewater in the first heat source side heat exchanger is switched in the reverse direction, .

Further, when the second and third heat source side valves are closed and the first and fourth heat source side valves are opened, the flow direction of the feed water in the second heat source side heat exchanger is switched in the reverse direction to clean the foreign matter clogging .

A first circulation pump provided at one side of the use-side heat exchanger and forcing the flow of the first circulating water; And a second circulation pump provided at one side of the heat source-side heat exchanger for forcing the flow of the second circulating water.

The apparatus further includes a filter device for filtering the supplied water supplied to the use-side heat exchanger or the wastewater supplied to the heat-source-side heat exchanger.

The filter device may further include: a first filter; And a second filter connected in parallel to the first filter.

According to an embodiment of the present invention, an advantage of heat exchange between the feed fluid and the waste fluid using a heat pump device is that the heat exchange efficiency is improved and the temperature after the feed is heat exchanged can be easily reached to the desired set temperature have.

Particularly, heat exchange efficiency can be improved by providing a heat source side heat exchanger for performing heat exchange between the circulating fluid of the heat pump device and the waste fluid, and a use side heat exchanger for performing heat exchange between the circulating fluid of the heat pump device and the supply fluid .

In addition, since the filter device is provided on the inflow side of the heat source side heat exchanger and the use side heat exchanger, the fluid flowing into the heat source side and the use side heat exchanger is filtered to prevent foreign matter from being trapped inside the heat exchanger .

Further, since the hot water supply system is further provided with an additional heat source, there is an advantage that the supply fluid having a relatively high temperature can be supplied to a predetermined process.

In addition, the hot water supply system is provided with a predetermined guide pipe and valve device, and the flow direction of the fluid passing through the heat exchanger can be reversed, thereby removing foreign matter accumulated in the heat exchanger.

1 is a system diagram showing a configuration of a conventional hot water supply system.
2 is a system diagram showing a configuration of a hot water supply system according to a first embodiment of the present invention.
3 is a view showing a configuration of a heat pump apparatus according to a first embodiment of the present invention.
4 is a system diagram showing a configuration of a hot water supply system according to a second embodiment of the present invention.
5 is a system diagram showing a configuration of a hot water supply system according to a third embodiment of the present invention.
6 is a view showing a state in which a fluid flows in a reverse direction in a part of the heat exchanger in the hot water supply system according to the third embodiment of the present invention.
FIG. 7 is a view showing a state in which a fluid flows in a reverse direction to another heat exchanger in a hot water supply system according to a third embodiment of the present invention. FIG.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

FIG. 2 is a system diagram showing a configuration of a hot water supply system according to a first embodiment of the present invention, and FIG. 3 is a view illustrating a configuration of a heat pump apparatus according to a first embodiment of the present invention.

Referring to FIG. 2, the hot water supply system 10 according to the first embodiment of the present invention may be modified so that heat exchange is performed between a supply fluid supplied to the use place 60 and a subsequent waste fluid used in the place of use 60 A heat pump apparatus 100 in which a refrigeration cycle is operated is included.

The use place 60 carries out a set process, and the set process includes a papermaking process for producing a waste paper or recycled paper.

The supply fluid and the waste fluid may include water. Hereinafter, the case where the fluid is water will be described as an example.

3, the heat pump apparatus 100 includes a compressor 110 for compressing a refrigerant, a condenser 120 for introducing high-temperature and high-pressure refrigerant compressed by the compressor 110, An evaporator 140 for evaporating the refrigerant decompressed in the expansion devices 131 and 132;

The expansion devices 131 and 132 are provided with a first expansion device 131 for firstarily expanding the refrigerant discharged from the condenser 120 and a second expansion device for expanding the refrigerant separated from the economizer 150 132).

The heat pump apparatus 100 includes a suction pipe 101 provided at an inlet side of the compressor 110 and guiding the refrigerant discharged from the evaporator 140 to the compressor 110, And a discharge pipe 102 provided at the outlet side and guiding the refrigerant discharged from the compressor 110 to the condenser 120. [

An oil return pipe 108 is provided between the evaporator 140 and the compressor 110 to guide the oil present in the evaporator 140 to the suction side of the compressor 110.

The condenser 120 and the evaporator 140 are formed of a shell and tube heat exchanger to enable heat exchange between the refrigerant and the circulating water.

The condenser 120 includes a shell 121 forming an outer appearance and a refrigerant inlet 122 formed at one side of the shell 121 and through which the refrigerant compressed by the compressor 110 flows, 121 and a refrigerant outlet 123 through which the refrigerant condensed in the condenser 120 flows out.

The condenser 120 is provided with a cooling water flow path 125 provided inside the shell 121 and guiding the flow of circulating water and a cooling water flow path 125 formed at one side of the end of the shell 121, And a cooling water outlet 128 formed at the other end of the shell 121 and allowing the circulating water to flow out from the cooling water passage 125. The cooling water outlet 127 is provided at the other end of the shell 121, The circulating water circulating through the condenser 120 may be referred to as "cooling water" or "first circulating water. &Quot;

The cooling water inflow part 127 is connected to the cooling water intake flow path 42 and the cooling water outflow part 128 is connected to the cooling water outflow flow path 44. The cooling water intake flow path 42 is a flow path through which the circulated water heat exchanged in the use side heat exchangers 310 and 320 flows and the cooling water outflow flow path 44 is understood as a flow path through which the circulated water heat exchanged in the condenser 120 is discharged.

On the coolant outlet side of the condenser 120, an economizer 150 is provided. The first expansion device 131 is provided at the inlet side of the economizer 150. The refrigerant condensed in the condenser 120 flows into the economizer 150 after the first refrigerant is firstly absorbed by the first expansion device 131.

The economizer 150 is understood to have a configuration for separating the liquid refrigerant and the gaseous refrigerant in the first reduced-pressure refrigerant. The separated gaseous refrigerant flows into the compressor (110), and the separated liquid refrigerant flows into the second expansion device (132) and can be secondarily reduced in pressure.

A refrigerant inlet port 142 formed at one side of the shell 141 and through which the refrigerant expanded in the second expansion device 132 flows, And a refrigerant outlet 143 formed on the other side of the evaporator 140 and through which refrigerant evaporated in the evaporator 140 flows out. The refrigerant outlet 143 may be connected to the suction pipe 101.

The evaporator 140 is provided with a cold water flow path 145 provided inside the shell 141 to guide the flow of the circulating water and a cooling water flow path 145 formed at one side of the end of the shell 141, And a cold water outlet 148 formed at the other end of the shell 141 to discharge the circulating water from the cold water passage 145. The circulating water circulating in the evaporator 140 may be called "cold water" or "second circulating water ".

The cold water inflow part 147 is connected to the cold water intake flow path 52 and the cold water outflow part 148 is connected to the cold water outflow path 54. The cold water inlet flow path 52 is a flow path through which the circulated water heat-exchanged in the heat source side heat exchangers 210 and 220 flows and the cold water outlet flow path 54 is understood as a flow path through which the circulated water heat-exchanged in the evaporator 140 is discharged.

2, the hot water supply system 10 is provided with a use-side heat exchanger (not shown) in which heat is exchanged between the first circulating water circulating the heat pump device 100 and the supply water to be supplied to the place of use 60 310, 320).

The use-side heat exchangers (310, 320) include a first use-side heat exchanger (310) and a second use-side heat exchanger (320). The first usage-side heat exchanger 310 and the second usage-side heat exchanger 320 may be connected in parallel.

The hot water supply system (10) further includes a supply source (65) for supplying the supply water to the first and second use-side heat exchangers (310, 320). A supply pipe 301 for guiding the flow of the supply water is provided between the supply source 65 and the first and second use-side heat exchangers 310 and 320. The supply pipe 301 is branched and connected to the supply branch pipes 302a and 302b and the supply branch pipes 302a and 302b are connected to the first and second use side heat exchangers 310 and 320, respectively.

The supply branch pipes 302a and 302b are provided with a first supply branch pipe 302a connected to the first use-side heat exchanger 310 and a second supply branch pipe 302b connected to the second use- And a pipe 302b is included.

Accordingly, the feed water flows into the first and second use-side heat exchangers 310 and 320 along the first and second supply branch pipes 302a and 302b and flows into the first and second usage-side heat exchangers 310 and 320 And is heat-exchanged with the incoming first circulating water.

The supply water heat-exchanged with the first circulating water in the first and second use-side heat exchangers (310, 320) may be supplied to the use site (60). At this time, the supply water discharged from the first and second usage-side heat exchangers 310 and 320 may be supplied to the use site 60 by being joined together.

The first circulating water that has passed through the condenser 120 of the heat pump apparatus 100 flows into the first and second use-side heat exchangers 310 and 320 via the cooling water outflow channel 44. A first circulating water pipe (305) for guiding the flow of the first circulating water is provided between the cooling water outflow channel (44) and the first and second using side heat exchangers (310, 320). The first circulating water pipe 305 is branched and connected to the first circulating water branch pipes 306a and 306b and the first circulating water branch pipes 306a and 306b are connected to the first and second use side heat exchangers 310, 320).

Therefore, the first circulating water is divided into the first and second use-side heat exchangers 310 and 320 along the first circulating water branch pipes 306a and 306b, and the first and second usage-side heat exchangers 310 and 320 The heat is exchanged with the supply water flowing into the heat exchanger.

The first circulating water heat-exchanged with the supply water in the first and second usage-side heat exchangers (310, 320) may be introduced into the condenser (120) of the heat pump apparatus (100).

A first circulation pump (331, 335) is provided at one side of the first and second usage-side heat exchangers (310, 320) for forcing the flow of the first circulating water. The first circulation pumps 331 and 335 may be provided at the outlet sides of the first usage-side heat exchanger 310 and the second usage-side heat exchanger 320, respectively. That is, the first circulation pumps 331 and 335 may be provided in a number corresponding to the first and second usage-side heat exchangers 310 and 320.

The first circulating water discharged from the first and second use-side heat exchangers 310 and 320 is passed through the first circulation pumps 331 and 335 and is then joined together. (120) of the condenser (100).

The hot water supply system 10 further includes bypass pipes 303 and 304 for allowing the supply water supplied from the supply source 65 to bypass the first and second usage-side heat exchangers 310 and 320.

The bypass pipe 303 and 304 are connected to a first bypass pipe 303 extending from the first supply branch pipe 302a to an inlet pipe of the use place 60 and a second bypass pipe 303 extending from the second supply branch pipe 302b And a second bypass pipe 304 extending to the inlet pipe of the use site 60 is included.

When the first usage-side heat exchanger (310) or the second usage-side heat exchanger (320) is clogged by foreign matter, the refrigerant flowing through the first and second supply branch pipes (302a, 302b) Side heat exchanger in which the clogging phenomenon occurs can be bypassed through the first bypass pipe 303 or the second bypass pipe 304 and supplied to the use site 60. [

The temperature of the supply water supplied from the supply source 65 forms t1 and the temperature after the supply water passes through the first and second use-side heat exchangers 310 and 320, that is, The temperature of the water can form t2. Of course, t2 forms a temperature higher than t1, for example, t1 may form 20 to 30 DEG C, and t2 may form 40 to 50 DEG C.

The discharge temperature tc2 of the first circulating water discharged from the condenser 120 may be higher than the inflowing temperature tc1 of the first circulating water flowing into the condenser 120. For example, tc1 may form 40-50 DEG C, and tc2 may form about 80 DEG C.

The hot water supply system 10 may be provided with filter devices 351 and 355 for filtering the supplied water. The filter devices 351 and 355 may be installed at the inlet sides of the first and second usage-side heat exchangers 310 and 320.

In detail, the hot water supply system 10 is provided with an auxiliary pipe 350 branched at one point of the supply pipe 301 and then lapped at another point, and a first filter 351 installed at the supply pipe 301 And a second filter 355 installed in the auxiliary pipe 350 and connected in parallel to the first filter 351.

At least a part of the supply water flowing through the supply pipe 301 may pass through the second filter 355 and the remaining supply water may pass through the first filter 351. By providing the plurality of filters 351 and 355 in this manner, the foreign matter of the supplied water can be easily filtered, and the flow of the supplied water can be smoothly performed even if clogging occurs in any one of the filters.

The hot water supply system 10 includes a heat source side heat exchanger 210 and 220 that performs heat exchange between the second circulating water circulating the heat pump device 100 and the wastewater used in the use place 60 .

The heat source side heat exchangers (210, 220) include a first heat source side heat exchanger (210) and a second heat source side heat exchanger (220). The first heat source side heat exchanger 210 and the second heat source side heat exchanger 220 may be connected in parallel.

The hot water supply system (10) further includes a waste water pipe (81) for supplying wastewater to the first and second heat source side heat exchangers (210, 220). The wastewater pipe 81 is understood as a pipe through which the water used in the use place 60 is discharged.

The waste water pipe 81 is branched and connected to the waste water branch pipes 82a and 82b and the waste water branch pipes 82a and 82b are connected to the first and second heat source side heat exchangers 210 and 220,

The waste water branch pipes 82a and 82b are connected to a first waste water branch pipe 82a connected to the first heat source side heat exchanger 210 and a second waste water branch pipe 82a connected to the second heat source side heat exchanger 220, And a pipe 82b is included.

Accordingly, the wastewater flows into the first and second heat source side heat exchangers 210 and 220 along the first and second wastewater branch pipes 82a and 82b and flows into the first and second heat source side heat exchangers 210 and 220 Exchanged with the second circulating water.

The wastewater heat-exchanged with the second circulation water in the first and second heat source side heat exchangers (210, 220) may flow into the circulation connection pipe (85). At this time, the wastewater discharged from the first and second heat source side heat exchangers 210 and 220 may be joined together and supplied to the circulation connection pipe 85. The circulation connection pipe 85 is connected to the waste water pipe 81 so that the waste water of the circulation pipe 85 can be re-supplied to the first and second heat source side heat exchangers 210 and 220.

At one side of the circulation connection pipe 85, a discharge tank 70 is connected. Therefore, at least a portion of the wastewater flowing through the circulation connecting pipe 85 flows into the discharge tank 70 and can be discharged to the outside.

The second circulating water that has passed through the evaporator 140 of the heat pump apparatus 100 flows into the first and second heat source side heat exchangers 210 and 220 via the cold water outlet flow path 54. A second circulating water pipe 205 for guiding the flow of the second circulating water is provided between the cold water outflow channel 54 and the first and second heat source side heat exchangers 210 and 220. The second circulating water pipe 205 is branched and connected to the second circulating water branch pipes 206a and 206b and the second circulating water branch pipes 206a and 206b are connected to the first and second heat source side heat exchangers 210 and 220, respectively.

Accordingly, the second circulation water flows into the first and second heat source side heat exchangers 210 and 220 along the second circulation water branch pipes 206a and 206b, and the first and second heat source side heat exchangers 210 and 220 ). ≪ / RTI >

The second circulating water that has been heat-exchanged with the wastewater in the first and second heat source side heat exchangers 210 and 220 may be introduced into the evaporator 140 of the heat pump device 100.

Second circulation pumps 231 and 235 are provided on one side of the first and second heat source side heat exchangers 210 and 220 for enforcing the flow of the second circulating water. The second circulation pumps 231 and 235 may be provided at the outlet sides of the first heat source side heat exchanger 210 and the second heat source side heat exchanger 220, respectively. That is, the second circulation pumps 231 and 235 may be provided in a number corresponding to the first and second heat source side heat exchangers 210 and 220.

The second circulation water discharged from the first and second heat source side heat exchangers 210 and 220 flows through the second circulation pumps 231 and 235 and is then connected to the evaporator 140 ). ≪ / RTI >

The hot water supply system 10 further includes bypass piping 83 and 84 for allowing wastewater supplied from the waste water pipe 81 to bypass the first and second heat source side heat exchangers 210 and 220. The bypass pipes 83 and 84 may be referred to as "first and second heat source side bypass pipes" and the bypass pipes 303 and 304 may be referred to as "first and second use side bypass pipes".

The bypass piping 83 and 84 are connected to a first bypass pipe 83 extending from the first waste water branch pipe 82a to the inflow side of the circulation connection pipe 85 and a second bypass pipe 83b extending from the second waste water branch pipe 82b ) To the inflow side of the circulation connection pipe (85).

When the first heat source side heat exchanger 210 or the second heat source side heat exchanger 220 is clogged by foreign matter, the refrigerant flowing through the first and second wastewater branch pipes 82a and 82b flows into the first The bypass pipe 83 or the second bypass pipe 84 bypasses the use-side heat exchanger where clogging has occurred and can be flowed to the circulating connection pipe 85.

The temperature of the wastewater flowing through the wastewater pipe 81 forms t3 and the temperature after the wastewater passes through the first and second heat source side heat exchangers 210 and 220, The temperature of the wastewater to be introduced may form t4. Of course, the above-mentioned t3 forms a temperature higher than t4, for example, t3 may form 20 to 30 DEG C, and t4 may form 10 to 20 DEG C.

The discharge temperature tw2 of the second circulating water discharged from the evaporator 140 may be lower than the inflow temperature tw1 of the second circulating water flowing into the evaporator 140. [ For example, tw1 forms 15 to 25 占 폚, and tw2 can form about 5 to 10 占 폚.

The hot water supply system 10 may be provided with filter devices 251 and 255 for filtering the supplied water. The filter devices 251 and 255 may be installed at the inlet sides of the first and second heat source side heat exchangers 210 and 220.

In detail, the hot water supply system 10 is provided with an auxiliary pipe 250 branching at one point of the waste water pipe 81 and then being joined at another point, and a first filter 251 And a second filter 255 installed in the auxiliary pipe 250 and connected in parallel to the first filter 251.

At least a portion of the wastewater flowing through the wastewater pipe 81 may pass through the second filter 255 and the remaining wastewater may pass through the second filter 251. By providing the plurality of filters 251 and 255, the foreign matter of the wastewater can be easily filtered, and the flow of the wastewater can be smoothly performed even if any one of the filters is clogged.

The operation according to this embodiment will be briefly described.

The supply water supplied from the supply source 65 is heated while passing through the first and second use-side heat exchangers 310 and 320, and the heated supply water is supplied to the use site 60.

When the first circulation pumps 331 and 335 are operated, the first circulating water circulates through the condenser 120 of the heat pump device 10 and the first and second use-side heat exchangers 310 and 320. In detail, the first circulating water discharged from the condenser 120 is cooled while passing through the first and second use-side heat exchangers 310 and 320, and the cooled first circulating water is re-introduced into the condenser 120 have.

The supply water may be filtered while passing through the filter devices 351 and 355 before flowing into the first and second usage-side heat exchangers 310 and 320, and at least a part of the supply water may flow through the bypass pipes 303 and 304 The first and second usage-side heat exchangers 310 and 320, and may be supplied to the use place 60.

The wastewater used in the use place 60 is cooled while passing through the first and second heat source side heat exchangers 210 and 220 through the wastewater pipe 81 and the cooled wastewater flows into the circulation connection pipe 85 And recycled to the wastewater pipe 81. At least a part of the wastewater of the circulating connection pipe 85 flows into the outlet tank 70 and is discharged to the outside.

When the second circulation pumps 231 and 235 are operated, the second circulating water circulates between the evaporator 140 of the heat pump device 10 and the first and second use-side heat exchangers 210 and 220. In detail, the second circulating water discharged from the evaporator 140 is heated while passing through the first and second heat source side heat exchangers 210 and 220, and the heated second circulating water can be re-introduced into the evaporator 140 have.

Meanwhile, the wastewater can be filtered while passing through the filter devices 251 and 255 before flowing into the first and second heat source side heat exchangers 210 and 220, and at least a part of the wastewater can be passed through the bypass pipes 83 and 84 The first and second heat source side heat exchangers 210 and 220 may be bypassed and supplied to the circulation connection pipe 85.

Hereinafter, the second and third embodiments of the present invention will be described. Since these embodiments differ from each other in some configurations in comparison with the first embodiment, differences will be mainly described, and explanations and reference numerals of the first embodiment will be used for the same portions as those in the first embodiment.

4 is a system diagram showing a configuration of a hot water supply system according to a second embodiment of the present invention.

4, the hot water supply system 10 'according to the second embodiment of the present invention includes a heating source (not shown) for further heating the supply water that has passed through the first and second usage-side heat exchangers 310 and 320 400).

As described above, the temperature of the supplied water supplied to the use site 60 may be about 40 to 50 캜, for example. On the other hand, when the temperature of the supply water required in the use place 60 is higher than the predetermined temperature or steam is required in the use place 60, the supply water is further heated in the heating source 400, 60).

The heating source 400 may include a boiler or a heater.

5 is a system diagram showing a configuration of a hot water supply system according to a third embodiment of the present invention.

5, a hot water supply system 20 according to a third embodiment of the present invention includes a heat pump device 100, first and second heat source side heat exchangers 210 and 220, first and second use side heat exchangers The first and second waste water branch pipes 82a and 82b, the heat source side bypass pipes 83 and 84, the supply pipe 301, the first and second supply branch pipes 302a and 302b, The first circulating water pipe 306a, the second circulating water pipe 205, and the second circulating water pipe (302b), the use side bypass pipe 303, 304, the first circulating water pipe 305, the first circulating water branch pipe 306a, 206a, and 206b.

Since these configurations are the same as those described in the first embodiment, detailed description is omitted here.

The hot water supply system 20 includes a plurality of valve devices for controlling the flow of the first and second circulating water. The plurality of valve devices are connected to the first circulating water valve devices 307a and 307b and the second circulating water branch pipes 206a and 206b installed in the first circulating water branch pipes 306a and 306b, And second circulating water valve devices 306a and 306b respectively installed.

Meanwhile, the hot water supply system 20 is provided with a plurality of hot water supply systems (not shown) for controlling the direction of flow of the wastewater or the supply water passing through the first and second heat source side heat exchangers 210 and 220 or the first and second usage side heat exchangers 310 and 320 A valve device is provided.

The plurality of valve devices are provided with a first heat source side valve 281 provided in the first waste water branch pipe 82a and a second heat source side valve 282 provided in the second waste water branch pipe 82b, A third heat source side valve 283 provided in the first heat source side bypass pipe 83 and a fourth heat source side valve 284 provided in the second heat source side bypass pipe 84, Side heat exchangers 210 and 220, and a fifth heat source-side valve 285 installed in the piping of the wastewater that has been mixed.

The plurality of valve devices are provided with a first use side valve 381 provided in the first supply branch pipe 302a and a second use side valve 382 provided in the second supply branch pipe 302b, A third use side valve 383 provided in the first use side bypass pipe 303 and a fourth use side valve 384 provided in the second use side bypass pipe 304, And a fifth use-side valve 385 installed in the piping of the supplied supply water after passing through the 1,2 use-side heat exchangers 310 and 320.

The plurality of valve devices can be controlled to be on or off, and the flow direction of the feed water or wastewater can be adjusted in the course of on or off control.

Referring to Fig. 5, the flow of the feed water or wastewater during normal hot water supply operation will be described. The operation mode shown in Fig. 5 may be called "normal operation mode ".

When supply water is supplied from the supply source 65, the supply water of the supply pipe 301 is branched to the first and second supply branch pipes 302a and 302b. At this time, the first use-side valve 381 and the second use-side valve 382 are opened.

Then, the third use-side valve 383 and the fourth use-side valve 384 are closed. Therefore, the supply water of the first supply branch pipe 302a flows into the first use-side heat exchanger 310, and the supply water of the second supply branch pipe 302b flows into the second use- (320). That is, the supply water flow in the first use-side bypass pipe 303 and the second use-side bypass pipe 304 is restricted.

The fifth usage-side valve 385 is opened so that the supply water that has passed through the first and second usage-side heat exchangers 310 and 320 is mixed and then flows through the fifth usage-side valve 385, And may be supplied to the use site 60.

Meanwhile, when wastewater is supplied from the wastewater pipe 81, the wastewater is branched into the first and second wastewater branch pipes 82a and 82b. At this time, the first heat source side valve 281 and the second heat source side valve 282 are opened.

Then, the third heat source side valve 283 and the fourth heat source side valve 284 are closed. Accordingly, the wastewater from the first wastewater branch pipe 82a flows into the first heat source side heat exchanger 210, and the wastewater from the second wastewater branch pipe 82b flows into the second heat source side heat exchanger 220 ). That is, the flow of wastewater in the first heat source side bypass pipe 83 and the second heat source side bypass pipe 84 is restricted.

The fifth heat source side valve 285 is opened so that the wastewater that has passed through the first and second heat source side heat exchangers 210 and 220 is lapped and then flows through the fifth heat source side valve 285, And may be introduced into the connection pipe 85.

6 is a view showing a state in which a fluid flows in a reverse direction in a part of the heat exchanger in the hot water supply system according to the third embodiment of the present invention.

Specifically, in FIG. 6, the water flow in the first heat source side heat exchanger 210 and the first use side heat exchanger 310 can be reversed. The flow of water in the opposite direction may have the effect of cleaning the foreign matter accumulated in the first heat source side heat exchanger 210 or the first use side heat exchanger 310. The operation mode shown in Fig. 6 may be referred to as a "first cleaning mode ".

That is, the flow direction of the wastewater in the first heat source side heat exchanger 210 is reversed as compared with the steady flow described in Fig. 5, and the flow direction of the supply water in the first usage side heat exchanger 310 is 5 as opposed to the steady flow described in Fig. Here, the fact that the flow in the heat exchanger is formed in the opposite direction is understood to change the inlet and the outlet of the heat exchanger.

Specifically, the first use-side valve 381 is closed and the second use-side valve 382 is opened. Then, the third use-side valve 383 is opened, the fourth use-side valve 384 is closed, and the fifth use-side valve 385 is closed.

In this case, the supply water supplied from the supply source 65 flows to the second supply branch pipe 302b, and the flow to the first supply branch pipe 302a is restricted.

The supply water that has passed through the second use-side heat exchanger 320 through the second supply branch pipe 302b can not flow to the use place 60 by the closed fifth use-side valve 385, And then flows into the first use-side heat exchanger (310). At this time, the refrigerant is introduced into the first use-side heat exchanger 310 through the discharge side of the first usage-side heat exchanger 310 described in Fig.

Therefore, the supply water flow in the first usage-side heat exchanger 310 is formed in the opposite direction to the flow direction of the supply water described in Fig. Accordingly, the foreign matter accumulated in the first usage-side heat exchanger 310 can be cleaned.

The supply water that has passed through the first use-side heat exchanger 310 in the reverse direction passes through the first use-side bypass pipe 303 through the opened third use-side valve 383, Lt; / RTI >

On the other hand, the first heat source side valve 281 is closed, and the second heat source side valve 282 is opened. Then, the third heat source side valve 283 is opened, the fourth heat source side valve 284 is closed, and the fifth heat source side valve 285 is closed.

In this case, the wastewater supplied from the wastewater pipe 81 flows to the second wastewater branch pipe 82b, and the flow to the first wastewater branch pipe 82a is restricted.

The wastewater that has passed through the second heat source branch piping 82b and passed through the second heat source side heat exchanger 220 can not flow to the circulation connection pipe 85 by the closed fifth heat source side valve 285, And then flows into the first heat source side heat exchanger (210). At this time, the wastewater flows into the first heat source side heat exchanger 210 through the discharge side of the first heat source side heat exchanger 210 described with reference to FIG.

Therefore, the wastewater flow in the first heat source side heat exchanger 210 is formed opposite to the flow direction of the wastewater described in Fig. Therefore, the foreign matter accumulated in the first heat source side heat exchanger 210 can be cleaned.

The supply water that has passed through the first heat source side heat exchanger 210 in the reverse direction passes through the first heat source side bypass pipe 83 through the opened third heat source side valve 283, 85 < / RTI >

FIG. 7 is a view showing a state in which a fluid flows in a reverse direction to another heat exchanger in a hot water supply system according to a third embodiment of the present invention. FIG.

7, the water flow in the second heat source side heat exchanger 220 and the second use side heat exchanger 320 can be reversed. The flow of water in the reverse direction can be used to clean the foreign matter accumulated in the second heat source side heat exchanger 220 or the second use side heat exchanger 320. The operation mode shown in Fig. 7 may be referred to as a "second cleaning mode ".

That is, the flow direction of the wastewater in the second heat source side heat exchanger 210 is reversed as compared with the steady flow described in Fig. 5, and the direction of the supply water flow in the second use side heat exchanger 320 is 5 as opposed to the steady flow described in Fig. Here, the fact that the flow in the heat exchanger is formed in the opposite direction is understood to change the inlet and the outlet of the heat exchanger.

Specifically, the first use-side valve 381 is opened and the second use-side valve 382 is closed. Then, the third use-side valve 383 is closed, the fourth use-side valve 384 is opened, and the fifth use-side valve 385 is closed.

In this case, the supply water supplied from the supply source 65 flows to the first supply branch pipe 302a, and the flow to the second supply branch pipe 302b is restricted.

The supply water that has passed through the first use-side heat exchanger 310 through the first supply branch pipe 302a can not flow to the use place 60 by the closed fifth use-side valve 385, And then flows into the second usage-side heat exchanger (320). At this time, the refrigerant is introduced into the second usage-side heat exchanger 320 through the discharge side of the second usage-side heat exchanger 320 described in Fig.

Therefore, the supply water flow in the second usage-side heat exchanger 320 is formed in the opposite direction to the flow direction of the supply water described in Fig. Accordingly, the foreign matter accumulated in the second usage-side heat exchanger 320 can be cleaned.

The supply water that has passed through the second usage-side heat exchanger 320 in the reverse direction passes through the second use-side bypass pipe 304 through the opened fourth usage-side valve 384, Lt; / RTI >

On the other hand, the first heat source side valve 281 is opened and the second heat source side valve 282 is closed. Then, the third heat source side valve 283 is closed, the fourth heat source side valve 284 is opened, and the fifth heat source side valve 285 is closed.

In this case, the wastewater supplied from the wastewater pipe 81 flows to the first wastewater branch pipe 82a, and the flow to the second wastewater branch pipe 82b is restricted.

The wastewater which has passed through the first heat source branch pipe 82a and passed through the first heat source side heat exchanger 210 can not flow to the circulation connection pipe 85 by the closed fifth heat source side valve 285, And then flows into the second heat source side heat exchanger (220). At this time, the wastewater flows into the second heat source side heat exchanger 220 through the discharge side of the second heat source side heat exchanger 220 described with reference to FIG.

Therefore, the wastewater flow in the second heat source side heat exchanger 220 is formed to be opposite to the flow direction of the wastewater described in Fig. Accordingly, the foreign matter accumulated in the second heat source side heat exchanger 220 can be cleaned.

The wastewater that has passed through the second heat source side heat exchanger 220 in the reverse direction passes through the second heat source side bypass pipe 84 through the opened fourth heat source side valve 284 and passes through the circulation connection pipe 85 ). ≪ / RTI >

As described above, by the action of the plurality of valve devices, the effect of cleaning the foreign matter accumulated in the heat exchanger by reversing the flow of water to one of the two heat source side heat exchangers and one of the two use side heat exchangers appear.

10: Hot water supply system 60: Usage place
65: supply source 70: discharge tank
85: Circulating connection piping 100: Heat pump device
210: First heat source side heat exchanger 220: Second heat source side heat exchanger
231: First heat source side pump 232: Second heat source side pump
251: first filter 255: second filter
310: first use-side heat exchanger 320: second use-side heat exchanger

Claims (18)

A heat pump device in which a refrigeration cycle is operated and a condenser into which the first circulating water flows and an evaporator into which the second circulating water flows;
A use-side heat exchanger in which heat exchange is performed between the supply water supplied from the supply source and the first circulation water;
A heat source side heat exchanger for exchanging heat between the waste water generated in the use place and the second circulation water by supplying the supply water having passed through the use side heat exchanger; And
And a circulation connection pipe through which the wastewater having passed through the heat source side heat exchanger is introduced and the wastewater is recirculated by the heat source side heat exchanger. The method according to claim 1,
And a discharge vessel extending from the circulation connection pipe for discharging at least a part of wastewater flowing through the circulation connection pipe. The method according to claim 1,
In the use-side heat exchanger,
A first use-side heat exchanger, and a second use-side heat exchanger. The method of claim 3,
A supply pipe extending from the supply source and guiding the flow of the supply water;
A first supply branch pipe branched from the supply pipe and extending to the first use-side heat exchanger; And
And a second supply branch pipe branched from the supply pipe and extending to the second use-side heat exchanger. 5. The method of claim 4,
A first use-side bypass pipe extending from the first supply branch pipe to the inlet side of the use destination to allow the supply water to bypass the first use-side heat exchanger; And
And a second use side bypass pipe extending from the second supply branch pipe to the inlet side of the use destination to allow the supply water to bypass the second use side heat exchanger. 6. The method of claim 5,
A first use-side valve installed in the first supply branch pipe;
A second use-side valve installed in the second supply branch pipe;
A third use-side valve installed in the first use-side bypass pipe; And
And a fourth use-side valve installed in the second use-side bypass pipe. The method according to claim 6,
When the first and fourth use-side valves are closed and the second and third use-side valves are opened,
And the supply water flow direction in the first use-side heat exchanger is switched in the reverse direction to clean the foreign matter clogging. The method according to claim 1,
When the second and third using-side valves are closed and the first and fourth using-side valves are opened,
And the supply water flow direction in the second use-side heat exchanger is switched in the reverse direction to clean the foreign matter clogging. The method according to claim 1,
In the heat source side heat exchanger,
A hot water supply system including a first heat source side heat exchanger and a second heat source side heat exchanger. 10. The method of claim 9,
A wastewater pipe guiding the flow of the wastewater generated in the use area;
A first wastewater branch pipe branched from the waste water pipe and extending to the first heat source side heat exchanger; And
And a second waste water branch pipe branched from the waste water pipe and extending to the second heat source side heat exchanger. 11. The method of claim 10,
A first heat source side bypass pipe extending from the first wastewater branch pipe to the inflow side of the circulation connection pipe to allow wastewater to bypass the first heat source side heat exchanger; And
And a second heat source side bypass pipe extending from the second wastewater branch pipe to the inflow side of the circulation connecting pipe so that the wastewater bypasses the second heat source side heat exchanger. 12. The method of claim 11,
A first heat source side valve installed in the first wastewater branch pipe;
A second heat source side valve installed in the second wastewater branch pipe;
A third heat source side valve installed on the first heat source side bypass pipe; And
And a fourth heat source side valve installed in the second heat source side bypass pipe. 13. The method of claim 12,
When the first and fourth heat source side valves are closed and the second and third heat source side valves are opened,
And the flow direction of the wastewater in the first heat source side heat exchanger is switched in the reverse direction to clean the foreign matter clogging. 13. The method of claim 12,
When the second and third heat source side valves are closed and the first and fourth heat source side valves are opened,
And the supply water flow direction in the second heat source side heat exchanger is switched in the reverse direction to clean the foreign matter clogging. The method according to claim 1,
A first circulation pump provided at one side of the use-side heat exchanger for forcing a flow of the first circulating water; And
And a second circulation pump provided at one side of the heat source-side heat exchanger to force the flow of the second circulation water. 16. The method of claim 15,
The use-side heat exchanger and the heat source-side heat exchanger are each provided in plural,
Wherein the first circulation pump and the second circulation pump are provided in plural numbers corresponding to the number of the use-side heat exchanger and the heat source-side heat exchanger, respectively. 11. The method of claim 10,
And a filter device for filtering the supply water supplied to the use-side heat exchanger or the waste water supplied to the heat source-side heat exchanger. 18. The method of claim 17,
In the filter device,
A first filter; And
And a second filter connected in parallel to the first filter.

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