Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a hot water circulation system for a heat pump according to the present invention; FIG.
As shown in the figure, the heat pump circulation hot water circulation system includes at least one outdoor unit 100 including a heat pump refrigerant cycle, a plurality of indoor units 200, and an indoor unit 200 installed between the outdoor unit 100 and the indoor unit 200, A water heat exchanger 400 for heat-exchanging the refrigerant with the phase-changing refrigerant along the heat pump refrigerant cycle to heat the water, and a water heat exchanger 400 for heat- A hot water supply unit 500 connected to the hot water supply unit 500 for supplying hot water and a water pipe 600 extending from the water heat exchanger 400, A refrigerant heating device 700 connected to the heat pump refrigerant cycle to selectively heat the refrigerant, and a refrigerant heating device 700 located between the refrigerant heating device 700 and the water heater 500, It is configured to include a hot water force device 800 which forces the water circulating between the value (500). Hot water circulation cycle
That is, the hot-water circulating hot water circulation system of the heat pump can selectively or simultaneously operate the hot water supply and the floor heating, and the simultaneous cooling / heating of the multiple indoor units 200 and the cooling / So that heating can be performed.
Further, the refrigerant heating apparatus 700 is configured to increase the heating efficiency by selectively heating the refrigerant at the time of operation in a heating mode after being left in an extreme cold.
In addition, by using the refrigerant heating apparatus 700 and the hot water warming-up apparatus 800, only the hot water supply can be used rapidly without using heating.
The outdoor unit 100 is generally installed outside the building. The outdoor unit 100 includes a constant speed compressor 120 that operates at a constant speed, an inverter compressor 120 'that is a variable speed heat pump, an accumulator 132, And an outdoor solenoid valve (LEV) (hereinafter referred to as an outdoor LEV).
The indoor unit 200 is installed in a room of a building and discharges air directly into a space for air conditioning. The indoor unit 200 includes an indoor heat exchanger 202, an expansion valve 204, and the like.
Between the outdoor unit 100 and the distributor 300, a liquid pipe 210, which is a single pipe through which a liquid refrigerant flows, a high-pressure pipe 214 through which a high-pressure gas refrigerant flows, and a low-pressure pipe 212 through which a low- Respectively.
In the indoor unit 200, an indoor liquid pipe 210 'through which a liquid refrigerant flows and an indoor pipe 212' through which gas refrigerant flows are formed respectively. The indoor liquid pipe 210 'and the indoor pipe 212' Pressure engine 214 and the low-pressure engine 212, as shown in FIG.
The indoor liquid pipe 210 'and the indoor pipe 212' can be connected to each other according to the capacity of the indoor unit 200 connected thereto. Respectively.
That is, the indoor unit 200 includes a first indoor unit 200a, a second indoor unit 200b, a third indoor unit 200c, and a fourth indoor unit 200d. In each of the indoor units 200, The first indoor liquid pipe 210'a, the second indoor liquid pipe 212'b, the third indoor pipe 212'c, the fourth indoor pipe 212'd, the first indoor liquid pipe 210'a, The liquid pipe 210'b, the third indoor liquid pipe 210'c, and the fourth indoor liquid pipe 210'd are connected to each other to guide the flow of the refrigerant.
Each of the indoor units 200, the indoor liquid pipe 210 ', and the indoor unit 212' may have different sizes and capacities.
On the other hand, each of the expansion valves 204 provided in the indoor unit 200 controls the refrigerant flowing into each of the indoor heat exchangers 202. That is, the first indoor unit 200a includes a first indoor heat exchanger 202a and a first expansion valve 204a, and the second indoor unit 200b includes a second indoor heat exchanger 202b and a second expansion valve 204b. The third indoor heat exchanger 202c and the third expansion valve 204c are provided in the third indoor unit 200c and the fourth indoor heat exchanger 202d And a fourth expansion valve 204d. Accordingly, each of the expansion valves 204 is controlled differently according to the user's selection, and controls the flow rate of the refrigerant flowing into the indoor heat exchanger 202.
Between the refrigerant heating device 700 and the water heater 500, the above-described hot water warming-up device 800 is provided. The hot water warming-up device 800 introduces heated water from the inside of the refrigerant heating device 700 into the hot water supply device 500 and supplies heat to the inside of the hot water supply device 500, 700) so that water can circulate along the closed circuit.
The detailed construction of the hot water warming-up device 800 will be described below.
Hereinafter, the configuration of the outdoor unit 100 will be described in detail with reference to FIG.
2 is a block diagram showing an outdoor unit which is a constitution of a hot water circulating system for a heat pump according to the present invention.
An equalizing pipe 121 is installed between the constant speed compressor 120 and the inverter compressor 120 'to allow the constant speed compressor 120 and the inverter compressor 120' to communicate with each other. Accordingly, if a shortage of oil supply occurs in one of the compressors, it is replenished from other compressors to prevent the compressors 120 and 120 'from being burned out due to insufficient flow.
As the compressors 120 and 120 ', a scroll compressor having low noise and high efficiency is used. In particular, the inverter compressor 120' is an inverter scroll compressor in which the rotation speed is controlled according to the load capacity. Therefore, when a small number of indoor units 200 are used and the load capacity is small, the inverter compressor 120 'is operated first, and when the load capacity gradually increases and the inverter compressor 120' 120 are operated.
Compressor discharge temperature sensors 120b and 120'b and an oil separator 122 for measuring the temperature of the refrigerant discharged from the compressors 120 and 120 'are respectively provided at the outlet sides of the constant speed compressor 120 and the inverter compressor 120' . The oil separator 122 filters the oil mixed in the refrigerant discharged from the compressors 120 and 120 'to be recovered to the compressors 120 and 120'.
That is, the oil used to cool the frictional heat generated when the compressors 120 and 120 'are driven is discharged to the outlets of the compressors 120 and 120' together with the refrigerant. The oil in the refrigerant is supplied to the oil separator 122, And is returned to the compressors 120 and 120 '.
A check valve 122 'is further provided at the outlet of the oil separator 122 to prevent the refrigerant from flowing backward. That is, when either the constant-speed compressor 120 or the inverter compressor 120 'is operated, the compressed refrigerant does not flow back into the stopped compressor 120/120'.
The oil separator 122 is configured to communicate with the four-way valve 124 by piping. The four-way valve 124 is arranged to change the flow direction of the refrigerant according to the cooling and heating operation. Each port is connected to the outlet (or oil separator) of the compressors 120 and 120 ' Accumulator), the outdoor heat exchanger 180, and the indoor unit 200.
Accordingly, the refrigerant discharged from the constant-speed compressor 120 and the inverter compressor 120 'is collected into one place and then flows into the four-way valve 124.
A hot gas pipe 125 for allowing a part of the refrigerant flowing into the four-way valve 124 from the oil separator 122 to be directly introduced into the accumulator 132, which will be described below, Lt; RTI ID = 0.0 > 124 < / RTI >
The hot gas pipe 125 allows the high pressure refrigerant at the outlet of the compressors 120 and 120 'to be directly supplied to the inlet of the compressors 120 and 120' when it is necessary to increase the pressure of the low pressure refrigerant flowing into the accumulator 132.
A high-pressure sensor 126 is provided on the hot water pipe 125. The high pressure sensor 126 measures the pressure of the refrigerant compressed by the compressor 120 and compares the pressure of the refrigerant with the target high pressure preset for heat exchange efficiency.
Accordingly, the high-pressure sensor 126 is interlocked with the bypass valve 142, which will be described below. That is, when the pressure of the refrigerant measured by the high pressure sensor 126 does not reach the refrigerant target high pressure for heating, the bypass valve 142 is opened to increase the pressure of the refrigerant.
The outdoor heat exchanger (180) is provided at the outlet of the outdoor heat exchanger (130). The outdoor unit cooler 130 further cools the refrigerant heat-exchanged in the outdoor heat exchanger 180, and is formed at any position of the liquid pipe 210.
The outdoor unit cooler 130 is formed as a double pipe. An inner pipe (not shown) communicating with the liquid pipe 210 is formed at the center, and an outer pipe (not shown) communicating with the reverse pipe 130 ', which will be described later, is formed on the outer side of the inner pipe .
On the other hand, a reverse transfer pipe 130 'is communicated with the liquid pipe 210 formed at the outlet of the outdoor water cooler 130. The reverse transfer pipe 130 'serves to guide the refrigerant flowing from the outdoor heat exchanger 180 through the liquid pipe 210 to the outside pipe (not shown) and flowing backward.
The reverse transfer pipe 130 'is provided with a supercooling expansion valve 130'a for converting liquid refrigerant into expanded low-temperature gas refrigerant by expansion. The supercooling expansion valve 130'a can regulate the amount of refrigerant flowing back through the reverse transfer pipe 130 '.
Accordingly, the refrigerant that has passed through the outdoor unit cooler 130 has a desired temperature. That is, as the amount of the refrigerant flowing backward through the reverse conduit 130 'increases, the temperature of the refrigerant passing through the outdoor unit cooler 130 will be lowered.
When a part of the refrigerant discharged from the outdoor heat exchanger 130 flows into the reverse transfer pipe 130 ', the refrigerant expands while passing through the supercooling expansion valve 130'a, And the liquid refrigerant flowing through the inner pipe (not shown) is further cooled through heat exchange while flowing backward through the outer pipe (not shown) of the outdoor and cooler 130.
The liquid refrigerant discharged from the outdoor heat exchanger 180 is further cooled by heat conduction while passing through the outdoor refrigerant cooler 130 and is supplied to the indoor unit 200. The refrigerant discharged from the outdoor refrigerant pipe 130 (Not shown) is supplied again to the compressors 120 and 120 'through the accumulator 132 and circulated.
A dryer 131 is installed at one side of the outdoor unit cooler 130, that is, at one side of the liquid pipe 210 in which the refrigerant discharged from the outdoor heat exchanger 180 is guided to the indoor unit 200. The dryer 131 removes moisture contained in the refrigerant flowing through the liquid pipe 210.
An accumulator 132 is installed between the constant-speed compressor 120 and the inverter compressor 120 '. The accumulator 132 filters the liquid refrigerant and allows only gaseous refrigerant to flow into the compressors 120 and 120 '.
That is, when the refrigerant flowing into the compressor 120 or 120 ', which is not evaporated into the gas in the refrigerant flowing from the indoor unit 200 and remains in the liquid state, flows directly into the compressors 120 and 120' .
Therefore, since the refrigerant remaining in the liquid state without being vaporized in the refrigerant flowing into the accumulator 132 is relatively heavier than the gaseous refrigerant, it is stored in the lower portion of the accumulator 132, and only the upper gaseous refrigerant flows into the compressors 120 and 120 ').
An outdoor heat exchanger (180) is installed in the outdoor unit (100). The outdoor heat exchanger 180 includes a vertical portion 182 'which is provided upright with respect to the ground so as to cause heat exchange between the refrigerant flowing in the inside and the outside air, and a vertical portion 182' extending from the lower end of the vertical portion 182 ' And an inclined portion 182 "
A cooling-dedicated pipe 198 is provided under the outdoor heat exchanger 180. The cooling pipe (198) is configured to prevent the refrigerant flow when the heat pump refrigerant cycle is in the cooling mode. A first check valve (198) for limiting the reverse flow of the refrigerant is provided at one side of the cooling pipe 199 are provided.
A bypass pipe 140 is provided between the outdoor heat exchanger 180 and the four-way valve 124. The bypass pipe 140 selectively supplies high-temperature and high-pressure refrigerant to the inside of the outdoor heat exchanger 180, and a bypass pipe 140 is selectively shielded at one side of the bypass pipe 140 A bypass valve 142 is provided.
In more detail, when the hot-water circulating system associated with the heat pump operates in the defrosting mode or in the heating mode after a long period of time while the operation is stopped, the high-pressure sensor 126 is compressed by the compressor 120, The bypass pipe 140 bypasses the refrigerant compressed in the compressor 120 to the lower portion of the outdoor heat exchanger 180. The refrigerant discharged from the outdoor heat exchanger 180 flows through the outdoor heat exchanger 180,
In this case, it is preferable that the predetermined target high pressure should be selectively changed according to the loads of the indoor unit 200, the hot water supply unit 500, and the hydrothermal heating unit 600.
A bypass guide valve 144 is provided below the outdoor heat exchanger 180 to block the refrigerant flow direction so that the refrigerant traveling through the open bypass pipe 140 is guided into the outdoor heat exchanger 180 do.
The bypass guide valve 144 is installed at one side of the outdoor discharge pipe 148 which communicates with the bypass pipe 140 and guides the refrigerant discharged from the outdoor heat exchanger 180 to the four- do.
The bypass valve 142 is opened and a part of the refrigerant discharged from the compressor 120 flows through the bypass pipe 140 to the inside of the outdoor discharge pipe 148 The refrigerant can not flow into the four-way valve 124 and can flow into the outdoor heat exchanger 180.
A refrigerant heating pipe 160 for guiding a refrigerant flow between the outdoor unit 100 and the refrigerant heating unit 700 is provided between the outdoor unit 100 and the refrigerant heating unit 700. The refrigerant heating pipe 160 is connected to the outdoor electromagnetic valve 102, the outdoor and the cooler 130, and the outdoor discharge pipe 148 in a communicative manner.
That is, the refrigerant heating pipe 160 includes a first refrigerant pipe 162 for guiding the refrigerant between the outdoor solenoid valve 102 and the outdoor heat exchanger 130 to the refrigerant heating device 700, A second refrigerant pipe 164 for guiding the refrigerant in the outdoor heat exchanger 148 to the refrigerant heating device 700, a third refrigerant pipe 164 for guiding the refrigerant passed through the refrigerant heating device 700 into the outdoor discharge pipe 148, (166).
A second check valve 165 and a third check valve 167 are provided at one side of the second refrigerant pipe 164 and the third refrigerant pipe 166 to control the flow direction of the refrigerant.
The second check valve 165 and the third check valve 167 are configured to control the flow direction of the refrigerant whose flow direction changes according to the operation mode of the hot water circulation system associated with the heat pump, And the refrigerant flowing in the third refrigerant pipe 166 flows only in a certain direction.
Hereinafter, the configuration of the distributor will be described with reference to FIG.
3 is a block diagram showing a distributor which is a constitution of a hot water circulating system for a heat pump according to the present invention.
As shown in the figure, the distributor 300 is also called a heat recovery unit and is provided between the outdoor unit 100 and the indoor unit 200 and between the outdoor unit 100 and the water heat exchanger 400, The pair of distributors 300 are connected to communicate with each other.
Accordingly, the distributor 300 can control the refrigerant flow to the water heat exchanger 400 or the indoor unit 200 by controlling the flow direction of the refrigerant, and the indoor unit 200 can be selectively heated or cooled.
A liquid connection pipe 320, a high pressure connection pipe 322, and a low pressure connection pipe 324, which are respectively connected to the liquid pipe 210, the high pressure pipe 214 and the low pressure pipe 212, Respectively.
A liquid connection pipe 320 is connected to the liquid pipe 210 and a high pressure connection pipe 322 is connected to the high pressure pipe 214 and a low pressure connection pipe 324 is connected to the low pressure pipe 212, .
Also, the distributor 300 is provided with an indoor connection pipe 212 '' and an indoor connection liquid pipe 210 'which are fastened to the indoor pipe 212' and the indoor pipe 210 '. That is, the indoor connection pipe 212 '' is fastened to the indoor pipe 212 'and the indoor connection pipe 210' is fastened to the indoor pipe 210 'to guide the flow of the refrigerant.
A plurality of main valves 330 and an auxiliary valve 332 are installed in the indoor connection unit 212. That is, as shown in the drawing, the first indoor unit 212 'of the first indoor unit 200a' a first indoor connection pipe 212a and a second indoor connection pipe 212b which are connected to the second indoor pipe 212b of the second indoor unit 200b, The second main valve 330b is installed in the engine 212 "b.
A third main valve 330c is installed in the third indoor connection engine 212c connected to the third indoor unit 212c of the third indoor unit 200c, A fourth main valve 330d is installed in the fourth indoor connection engine 212 'd connected to the fourth indoor engine 212'd to selectively pass the refrigerant.
The main valves 330a, 330b, 330c, and 330d and the auxiliary valves 332a, 332b, 332c, and 332d are selectively opened when the hot-water circulation system is operated in the cooling or heating mode, The main valves 330a, 330b, 330c, 330d and the auxiliary valves 332a, 332b, 332c, 332d are both shielded for a certain period of time, more specifically, for about 2 minutes to 3 minutes.
This is to reduce the amount of impulse of the high-pressure refrigerant and the low-pressure refrigerant, which are generated when the flow direction of the refrigerant is changed when the cooling / heating operation mode is switched.
Meanwhile, the indoor connection organ 212 '' is branched inside the distributor 300 to form a branch pipe 340. That is, from the first indoor connection organ 212 '', a first branch pipe 340a And a first auxiliary valve 332a is installed in the first branch tube 340a to selectively control the refrigerant passing through the first branch tube 340a.
The second branch pipe 340b and the third branch pipe 340c are also connected to the second indoor connection pipe 212 "b, the third indoor connection pipe 212" c and the fourth indoor connection pipe 212 " And a fourth branch pipe 340d are branched from the branch pipe 340. A second auxiliary valve 332b and a third auxiliary valve 332c having the same function as the first auxiliary valve 332a are also connected to the branch pipes 340, And a fourth auxiliary valve 332d, respectively.
The branch pipe (340) communicates with the high pressure connection pipe (322). That is, one end of each branch pipe 340 is connected to the indoor connection pipe 212 '', and the other end thereof is connected to the high pressure pipe 214. Thus, when the auxiliary valve 332 is opened , And the indoor engine 212 'and the high-pressure engine 214 communicate with each other.
The distributor (300) is further provided with a simultaneous cooler (350). The simultaneous cooler 350 is operated when both heating and cooling are simultaneously performed, thereby improving the cooling efficiency. The simultaneous cooler 350 is connected to the liquid pipe 210 and is formed of a double pipe such as the outdoor water cooler 130 to further cool the refrigerant flowing through the liquid pipe 210.
Although not shown, the liquid pipe 210 provided inside the simultaneous cooler 350 is preferably a spiral tube. Such a spiral tube improves the cooling rate and the cooling efficiency.
A lower pipe 352 branched from the liquid pipe 210 is further formed below the simultaneous cooler 350 and a supercooling valve 354 is provided in the upper pipe 352. The supercooling degree control valve 354 is opened during simultaneous cooling / heating operation so that the refrigerant flowing through the liquid pipe 210 is further cooled. That is, the two-phase (gas + liquid) refrigerant flowing through the liquid pipe 210 is cooled in the simultaneous cooler 350 to be converted into a complete liquid phase.
A condensate removing means (360) is further provided in the distributor (300). The condensate removing means 360 includes a refrigerant connection pipe 362 for allowing the high pressure orifice 214 and the low pressure orifice 212 to communicate with each other and a refrigerant pipe 362 for controlling the flow of the refrigerant through the refrigerant connection pipe 362, A valve 364, and a capillary 366 for expanding the refrigerant flowing through the refrigerant connection pipe 362.
The connection pipe opening / closing valve 364 opens the refrigerant connection pipe 362 when all of the indoor units are operated in the cooling mode, and the refrigerant flowing through the refrigerant connection pipe 362 flows through the refrigerant pipe 362, And is expanded at the capillary 366. Accordingly, the condensate of the refrigerant condensed in the high-pressure orifice 214 is expanded and recovered to the low-pressure orifice 212 when the refrigerating chamber is operated.
Meanwhile, a refrigerant bypassing means 370 is further provided in the distributor 300. The refrigerant bypassing means 370 serves to bypass the refrigerant when the refrigerant stopped before the cooling / heating switching of the indoor unit 200 collides with the refrigerant flowing after the cooling / heating switching, thereby reducing the amount of impact .
That is, the refrigerant bypassing means 370 functions to bypass the refrigerant when the high-pressure refrigerant and the low-pressure refrigerant collide with each other to correct the pressure difference of the refrigerant, thereby reducing the noise generated during the cooling / heating switching .
To this end, the refrigerant bypassing means 370 includes a cold refrigerant pipe 372 having one end communicating with the low pressure connecting pipe 324 and the other end communicating with the indoor connecting pipe 212 " And a refrigerant bypass valve 374 for selectively opening and closing the inside of the refrigerant bypass valve 374.
More specifically, the cold aeration tubes 372a, 372b, 372c, 372d and the refrigerant bypass valves 374a, 374b, 374c, 374d are connected to the first indoor connection engine 212 " quot; d "
When one of the refrigerant bypass valves 374a, 374b, 374c, and 374d is operated in the cooling mode and one of the chambers is opened in the heating mode during operation, the refrigerant bypass valves are opened and closed in the same manner as the auxiliary valves 332a, 332b, 332c, and 332d .
Accordingly, when the auxiliary valves 332a, 332b, 332c, and 332d and the refrigerant bypass valves 374a, 374b, 374c, and 374d are blocked while operating in the cooling mode, the branch pipes 340a, 340b, 340c, The refrigerant remaining in the outdoor unit 100 is discharged from the outdoor unit 100 to the branches 340a and 340b as the auxiliary valves 332a, 332b, 332c and 332d and the refrigerant bypass valves 374a, 374b, 374c and 374d are opened. , 340b, 340c, and 340d, a part of the refrigerant flows into the cooler tubes 372a, 372b, 372c, and 372d and is bypassed, thereby reducing the impact.
The distributor 300 configured as above is applied to both of the pair of distributors shown in FIG. However, since the dispenser 300 located at the upper side is connected to one water heat exchanger 400, only one of the indoor units 212 'and the indoor liquid pipe 210' can be selectively connected.
Of course, the indoor unit 200 and the water heat exchanger 400 may be further connected to the indoor unit 212 'and the indoor unit 210'.
On the right side of the distributor 300, a water heat exchanger 400, a hot water supply part 500, and a hydrothermal heating apparatus 600 are provided.
Hereinafter, the construction of the water heat exchanger 400, the water heater 500, and the hydrothermal heating apparatus 600 will be described in detail with reference to FIG.
4 is a configuration diagram showing a hot water supply apparatus, a hydrothermal heating apparatus, and a hot water supply forced apparatus, which are components of a hot water circulation system associated with a heat pump according to the present invention.
The water heat exchanger 400 is connected to a refrigerant pipe 402 for guiding the refrigerant discharged from the distributor 300 through the water heat exchanger 400 to return to the water heat exchanger 400, And the refrigerant pipe 402 passes through a water-refrigerant heat exchanger 410 configured to exchange heat between water and refrigerant.
That is, the refrigerant pipe 402 is connected to the indoor liquid pipe 210 'and the indoor liquid pipe 210' to form a closed circuit.
The refrigerant pipe 402 is provided with temperature sensors TH1 and TH2. In other words, one temperature sensor (TH1, TH2) is provided on the inlet side and the outlet side of the water-refrigerant heat exchanger (410), respectively.
The water-refrigerant heat exchanger 410 is a part where heat exchange is performed between the refrigerant flowing along the heat pump refrigerant cycle and the water flowing along the water pipe, and a plate heat exchanger is applicable.
The water-refrigerant heat exchanger (410) receives heat from the refrigerant introduced from the distributor (300) and heats the water.
More specifically, the water passing through the water heater 500 and the hydrothermal heating apparatus 600 is in a lukewarm state. The water is heated by receiving heat from the refrigerant while passing through the water-refrigerant heat exchanger 410.
Therefore, temperature sensors (TH3 and TH4) for measuring the temperature of the refrigerant and the water before and after the heat exchange can be mounted on the right side of the water refrigerant heat exchanger (410), that is, the inlet water pipe and the outlet water pipe.
A flow switch 420 for sensing the flow of water is provided above the temperature sensors TH3 and TH4 and an expansion tank 430 is branched and connected to the upper side of the flow switch 420. [
In addition, the expansion tank 430 performs a damping function to absorb water when the volume of the heated water is expanded to an appropriate level or higher while passing through the water-refrigerant heat exchanger 410. A diaphragm is contained in the expansion tank 430 and moves in response to a volume change of the water inside the water pipe. The expansion tank 430 is filled with nitrogen gas.
A heater assembly 440 is disposed above the expansion tank 430. The heater assembly 440 is configured to heat the water that has passed through the water-refrigerant heat exchanger 410 by the auxiliary heater 444. The amount of heat absorbed through the water-refrigerant heat exchanger 410 The auxiliary heater 444 is selectively operated.
An air vent 443 is formed above the heater assembly 440 so that the superheated air existing in the heater assembly 440 is discharged. A pressure gauge 445 and a relief valve 446 are provided on either side of the heater assembly 440 so that the pressure inside the heater assembly 440 can be appropriately adjusted.
For example, when the water pressure displayed through the pressure gauge 445 is excessively high, the relief valve 446 is opened so that the pressure inside the water heat exchanger 400 is appropriately adjusted.
On the right side of the auxiliary heater 444, a temperature sensor TH5 for measuring the temperature of the water via the auxiliary heater is provided.
A water pump 460 is provided on the right side of the temperature sensor TH5. The water pump 46 pumps the water discharged through the water pipe extending from the outlet side of the heater assembly 440 to be supplied to the water heater 500 and the hydrothermal heating apparatus 600.
On the other hand, the water heater 500 is a part for warming and supplying water required for a work such as washing or washing dishes.
A branch pipe (470) for branching water is provided at a point separated from the water pump (460) in the water flow direction. The branch pipe 470 branches the water pumped by the water pump 460 to flow into the hot water supply apparatus 500 and the hydrothermal heating apparatus 600.
A water supply pipe 580 for guiding the flow direction of water to the hot water supply apparatus 500 is connected to the branch pipe 470 and a heating pipe 580 for guiding the water flow direction to the hydrothermal heating apparatus 600 And a pipe 630 are respectively connected.
A heating valve 632 and a hot water supply valve 582 are provided in the heating pipe 630 and the hot water pipe 580, respectively. That is, the heating pipe 630 is provided with a heating valve 632, and the hot water pipe 580 is provided with a hot water valve 582.
Accordingly, the hydrothermal heating apparatus 600 and the water heater 500 operate selectively according to the operation state of the hot water supply valve 582 and the heating valve 632.
The hot water supply apparatus 500 includes a hot water tank 510 for storing water supplied from the outside and heating stored water and an auxiliary heater 520 provided inside the hot water tank 510.
Further, an auxiliary heat source for supplying heat to the hot water tank 510 may be further added according to the installation mode, and a thermal storage tank 530 using solar heat may be used as a possible auxiliary heat source. A water inlet 511 for introducing cold water and a water outlet 512 for discharging heated water are provided on one side of the water heater 500.
More specifically, a part of the hot water pipe extending from the branch pipe 470 is introduced into the hot water tank 510 to heat water stored in the hot water tank 510. That is, heat is transferred from the hot water flowing along the inside of the hot water pipe 580 to the water stored in the hot water tank 510.
In a specific case, the auxiliary heater 520 and the auxiliary heat source may be operated to further supply additional heat. For example, it can operate when water needs to be warmed up in a short time, such as when the user needs a lot of hot water to bathe. A temperature sensor TH6 for sensing the temperature of water may be mounted on one side of the hot water tank 510.
According to the embodiment, the water outlet 512 may be connected to a hot water discharge device such as a shower 550 or a household appliance such as a humidifier 560. When the solar heat storage tank 530 is used as the auxiliary heat source, the heat storage pipe 570 extending from the storage tank 530 may be inserted into the hot water tank 510. An auxiliary pump 540 for controlling the flow rate in the heat storage pipe closed circuit is mounted on the heat storage pipe 570 and a directional switching valve VA for controlling the flow direction of the water inside the heat storage pipe 570 is mounted . On either side of the heat storage pipe 57, a temperature sensor TH7 for measuring the temperature of the water can be mounted.
It is to be noted that the auxiliary heat source structure such as the heat storage unit using the solar heat described above is not limited to the illustrated embodiment but can be mounted in different locations with various shapes.
The hydrothermal heating unit 600 includes a floor heating unit 610 formed by partially embedding the heating pipe 630 in the floor of the room and a floor heating unit 630 branched from any point of the heating pipe 630, And air heating means 620 connected in parallel with the means 610.
In detail, the floor heating means 610 may be embedded in meander lines on the floor of the room as shown. The air heating means 620 may be a fan coil unit, a radiator, or the like. A part of the air heating pipe 640 branched from the heating pipe 630 is provided in the air heating means 620 as heat exchanging means. A flow path switching valve 650 or 660 such as a three-way valve is provided at a branch point of the air heating pipe 640 so that refrigerant flowing along the heating pipe 630 flows through the floor heating means 610, (620), or flow only to either side.
The end of the hot water pipe 580 extending from the branch pipe 470 is joined at a position spaced apart from the outlet end of the air heating pipe 640 in the direction of water flow. Therefore, in the hot water supply mode, the refrigerant flowing along the hot water pipe 580 is combined with the heat pipe 630, and then flows into the water-refrigerant heat exchanger 410.
Here, a check valve (V) is provided at a point where the reverse flow shutoff is required, such as a point where the hot water pipe (580) is combined with the heating pipe (630), so that back flow of water can be prevented. In the same manner, it is also possible to provide a check valve at the outlet end of the air heating pipe 640 and at the outlet end of the floor heating means 610, respectively, in addition to the method in which the flow path switching valve 660 is installed.
Hereinafter, the configuration of the refrigerant heating apparatus 700 will be described with reference to FIG.
FIG. 5 is a block diagram of a refrigerant heating apparatus, which is a constitution of a hot water circulation system associated with a heat pump according to the present invention.
As shown in the drawing, the refrigerant heating apparatus 700 is connected to the heat pump refrigerant cycle to selectively heat the refrigerant, and a refrigerant circulation pipe 710 is provided on the inner left side of the refrigerant heating apparatus.
The refrigerant circulation pipe 710 communicates with the heat pump refrigerant cycle to allow the refrigerant in the outdoor unit 100 to circulate in the refrigerant heating device 700.
That is, the refrigerant circulation pipe 710 includes a first circulation pipe 712 connected to the first refrigerant pipe 162, a second circulation pipe 714 connected to the second refrigerant pipe 164, And a third circulation pipe (715) connected to the third refrigerant pipe (166).
The second circulation pipe 714 is connected to the first circulation pipe 712 inside the refrigerant heating device 700 and the first circulation pipe 712 and the third circulation pipe 716 communicate with each other.
Therefore, the refrigerant introduced into the first circulation pipe 712 or the second circulation pipe 714 is returned to the inside of the outdoor unit through the third circulation pipe 716.
An overheating prevention pipe 720 is provided at one side of the first circulation pipe 712. The overheating prevention pipe 720 is configured to communicate between the first circulation pipe 712 and the third circulation pipe 716 and a superheat shutoff valve 722 is provided at one side of the overheat prevention pipe 720.
The overheat shut-off valve 722 selectively opens the overheating shut-off pipe 720 and branches a part of the refrigerant flowing through the first circulation pipe 712 to the third circulation pipe 716 to prevent the refrigerant from being heated Thereby preventing overheating of the refrigerant.
A circulation pipe 730 is provided at one side of the first circulation pipe 712. An open / close valve 732 is provided in the return pipe 730 to selectively allow refrigerant to flow.
That is, a heating expansion valve 740 is provided below the circulation pipe 730, and the heating expansion valve 740 expands the refrigerant when the refrigerant heating means 750 to be described below is used as an evaporator.
Accordingly, when the refrigerant flows into the first circulation pipe 712 in a state where the opening / closing valve 732 shields the circulation pipe 730, the refrigerant can be expanded through the heating expansion valve 740.
A refrigerant heating means 750 is provided at the center of the refrigerant heating device 700. The refrigerant heating means 750 is a plate heat exchanger for exchanging heat between the refrigerant circulating through the refrigerant circulation pipe 710 and water.
That is, the heating water passage 752 through which the water flows is coupled to the right side of the inside of the refrigerant heating means 750, and the heated water circulates through the heating water passage 752 through the water heating means 760, The refrigerant flowing through the inside of the refrigerant heating means 750 flows in a state of being separated from each other and is heat-exchanged to heat the refrigerant.
To this end, a water heating means 760 is provided on the right side of the heating expansion valve 740. The water heating means 760 includes a water heating portion 762 through which the heating water path 752 passes and a heating source 764 for supplying heat to the water heating portion 762.
The heating source 764 can be variously modified within a range capable of heating the water heating portion. For example, gas, oil, heater, solar heat, etc. can be applied.
A water pump 770 is provided at one side of the heating water passage 764 to enforce water circulation inside the heating water passage 752. Both ends of the heating water passage 752 are connected to a heating tank 780 As shown in FIG.
A certain level of water is stored in the heating tank 780 and water in the heating tank 780 circulates along the heating water path 752.
Therefore, the water heated by the water heating means 760 while moving along the heating water passage 752 is stored in the heating tank 780.
The warm water heating system 800 is provided between the hot water supply system 500 and the refrigerant heating system 700, which is a main component of the present invention.
The hot water warming-up enforcement apparatus 800 is a configuration for enabling a user to use hot water promptly.
That is, the water heater 500 may provide hot water to the user by using the heat supplied from the water heat exchanger 400. However, in the hot water heater 500 of the embodiment of the present invention, So that hot water can be used by the user.
Hereinafter, the construction of the hot water heating device 800 will be described in detail with reference to FIGS. 4 and 5. FIG.
As shown in these figures, the hot water warming-up device 800 includes a hot water supply pipe 820 for circulating water between the hot water supply device 500 and the refrigerant heating device 700, A water flow sensor (reference numeral 860 in FIG. 1) for sensing a water flow inside the hot water supply pipe 820, a water temperature sensor (not shown) for detecting the water temperature in the hot water supply pipe 820 And a hot water temperature sensor 880 for measuring the temperature of the hot water.
The hot water supply pipe 820 is configured to communicate with the hot water pipe 580 so that the water heated by the refrigerant heating device 700 can supply heat to the hot water supply device 500.
That is, the inner water of the hot water supply pipe 820 is forced to flow by the hot water pump 840 and heated inside the water heating means 760, and the heated water is heated inside the hot water tank 510 And then exits through the hot water pipe 580 to heat the water stored in the hot water tank 510.
The water that has passed through the hot water pipe 580 flows into the coolant heating device 700 through the water supply pipe 820 and is heated.
One side of the hot water supply pipe 820 is provided with a hot water temperature sensor 880 for measuring the temperature of the water flowing therein. The hot water temperature sensor 880 measures the temperature of the water flowing into the water heating means 760 and the temperature of the water passed through the water heating means 760 so that the water is heated by the water heating means 760 , How much is heated, and the like.
Therefore, the hot water temperature sensor 880 includes a cold water temperature sensor TH8 for measuring the temperature of the water flowing into the refrigerant heating device 700, and a water temperature sensor for measuring the temperature of the water heated via the refrigerant heating device 700 And a hot water temperature sensor TH9.
The cold water temperature sensor TH8 and the hot water temperature sensor TH9 vary the amount of heat that the water heating means 760 provides to the hot water supply pipe 820 according to the detected water temperature.
That is, when the temperature of the water heated by the water heating means 760 is low, even if the water moves along the hot water supply pipe 820, the amount of heat stored in the hot water tank 510 becomes insufficient This temperature is cooled by allowing the water heating means 760 to heat up to a higher temperature by comparing the measured water temperature measured by the cold water temperature sensor TH8 and the hot water temperature sensor TH9 with a predetermined set water temperature So that rapid hot water use can be enabled.
In the meantime, the hot water warming-up device 800 may be used when the user wishes to use hot water quickly. However, in the case of using only heating without using hot water, The hot water warming-up device 800 need not be used.
At this time, the operation of the hot water supply pump 840 is stopped, and the hot water supply pipe 820 is further provided with a hot water supply valve 890. The hot water supply valve 890 is configured to heat the water in the hot water tank 510 using the coolant heating device 700 and to use hot water with the heated water, The hot water supply valve 890 is shielded.
More specifically, the hot water supply valve 890 includes an inlet shutoff valve 892 for selectively shutting off the flow of the water flowing into the hot water supply apparatus 500, And the flow-out shutoff valve 892 and the flow-out shutoff valve 894 simultaneously shield or open the hot water supply pipe 820.
Hereinafter, the operation of the hot-water circulation system associated with the heat pump will be described with reference to flows of refrigerant and water.
First, the air and floor heating and hot water fixing using the refrigerant heating apparatus 700 and the outdoor unit 100 in the extreme cold environment will be described with reference to FIG.
At this time, the bypass guide valve 144, the outdoor expansion valve 102, the overheat shutoff valve 722, the hot water supply valve 582, and the heating valve 632 are opened, and the overheat shutoff valve 722, The on-off valve 732, and the hot water only valve 890 are in a shielded state.
Then, the hot water supply pump 840 is kept stationary.
The refrigerant discharged from the compressors 120 and 120 'flows into the distributor 300 through the oil separator 122 and the high-pressure orifice 214.
In the distributor 300, each main valve 330 is turned off and each of the auxiliary valves 332 is turned on. Therefore, the refrigerant flowing into the distributor 300 through the high-pressure orifice 214 flows into the indoor engine 212 'through the branch pipe 340.
The refrigerant flowing into the indoor engine 212 'through the branch pipe 340 is supplied to the indoor unit 200 and is condensed through heat exchange with indoor air while passing through the indoor heat exchanger 202.
That is, in the case of heating, the indoor heat exchanger 202 acts as a condenser to warm the internal air by heat generation. Since the expansion valve 204 is opened, the refrigerant that has been converted into the liquid state while passing through the indoor heat exchanger 202 flows into the distributor 300 through the indoor liquid pipe 210 '.
The liquid refrigerant in the distributor 300 flows into the outdoor unit 100 through the liquid pipe 210. The refrigerant flowing into the outdoor unit 100 passes through the outdoor LEV 102 and is supplied to the outdoor heat exchanger 180 to perform heat exchange. At this time, since the outdoor heat exchanger 180 functions as an evaporator, the liquid refrigerant is converted into a gas phase by heat exchange with the outside air.
The gaseous low-pressure refrigerant discharged from the outdoor heat exchanger 180 passes through the four-way valve 124 and is supplied to the compressors 120 and 120 'through the accumulator 132. Through this process, one heating cycle is formed.
Meanwhile, during this process, a part of the refrigerant passing through the outdoor unit cooler 130 flows into the refrigerant heating apparatus through the first refrigerant pipe 162 and the first circulation pipe, and circulates.
At this time, the heating source 764 provides heat to the water heating unit 762, and this heat heats the water circulating the heating tank 780 and the water heating unit 762.
The heated water passes through the inside of the refrigerant heating means 750 and exchanges heat with the refrigerant to provide heat to the refrigerant.
The refrigerant heat-exchanged with water in the refrigerant heating means 750 flows into the outdoor unit 100 through the third circulation pipe 716.
Accordingly, the refrigerant rapidly cooled through the indoor unit 200 in the extreme cold air is heated while passing through the refrigerant heating device 700, so that the heat exchange efficiency can be maximized.
Hereinafter, a refrigerant and water flow will be described with reference to FIG. 7 in the case of interrupting the refrigerant flow into the outdoor heat exchanger 180 and operating the refrigerant heating apparatus 700 to heat the air in the indoor space.
At this time, the hot water supply valve 582, the heating valve 632, and the hot water supply valve 890 are shielded, and the bypass guide valve 144 and the outdoor LEV 102 are shielded.
Then, the hot water supply pump 840 is kept stationary.
The indoor heat exchanger 202 acts as a condenser to warm the internal air by heat generation. Since the expansion valve 204 is opened, the refrigerant that has been converted into the liquid state while passing through the indoor heat exchanger 202 flows into the distributor 300 through the indoor liquid pipe 210 '.
The liquid refrigerant in the distributor 300 flows into the outdoor unit 100 through the liquid pipe 210. The refrigerant flowing into the outdoor unit 100 flows into the refrigerant heating unit 700 through the first refrigerant pipe 162 because the outdoor LEV 102 is shielded.
The refrigerant introduced into the refrigerant heating apparatus 700 expands through the heating expansion valve 740 and the heating source 764 provides heat to the water heating unit 762. This heat heats the water circulating through the heating tank 780 and the water heating portion 762.
The heated water passes through the inside of the refrigerant heating means 750 and exchanges heat with the refrigerant to provide heat to the refrigerant.
The refrigerant heat exchanged with water in the refrigerant heating means 750 is converted into a gas phase and then flows into the outdoor unit through the third circulation pipe.
The refrigerant flowing into the outdoor unit passes through the third refrigerant pipe 166, the third check valve 167 and the four-way valve 104 and is supplied to the compressors 120 and 120 'through the accumulator 132. Through this process, one heating cycle is formed.
Hereinafter, the outdoor heat exchanger 180 is frozen during the heating operation using the heat pump refrigerant cycle, and the flow of the refrigerant and water during the defrosting operation will be described with reference to FIG.
First, the bypass guide valve 144 and the outdoor LEV 102 are opened, and the heat expansion valve 740, the overheat shutoff valve 722, and the bypass valve 142 Is shielded.
When the heating operation is performed in the pipe-disconnection state as described above, the outdoor heat exchanger 180 installed outdoors is defrosted to lower the heat exchange efficiency, and the defrost operation is performed to increase the heat exchange efficiency.
At this time, the bypass guide valve 144 and the outdoor LEV 102 are shielded, and the bypass valve 142 is opened. The heating source 764 operates to heat the water heating unit 762, and the water circulating through the refrigerant heating unit 700 is heated so that the water heating unit 760 operates as an evaporator.
Since the pressure of the refrigerant measured by the high pressure sensor 126 is lower than the target high pressure, the bypass valve 142 is opened and the refrigerant flows to the target high pressure.
8, a portion of the refrigerant compressed by the compressor 120 is discharged through the outdoor discharge pipe 148 through the bypass pipe 140 because the bypass valve 142 is opened. Respectively.
The high-temperature and high-pressure refrigerant introduced into the outdoor discharge pipe 148 passes through the outdoor heat exchanger 180 because the bypass guide valve 144 is blocked.
At this time, the outdoor heat exchanger 180 is rapidly defrosted by the high-temperature and high-pressure refrigerant, and the refrigerant condenses.
The condensed refrigerant passed through the outdoor heat exchanger 180 passes through the first check valve 199 since the outdoor LEV 102 is shielded.
Then, the refrigerant is introduced into the refrigerant heating apparatus 700 through the first refrigerant pipe 162 and the first circulation pipe 712. The refrigerant flowing into the refrigerant heating apparatus 700 is expanded by the heat expansion valve 740 and then heat-exchanged with water while passing through the refrigerant heating means 750, thereby being evaporated.
The refrigerant vaporized by the refrigerant heating means 750 flows into the four-way valve 124 through the third circulation pipe 715 and the third refrigerant pipe 166 and then flows through the accumulator 132 to the compressor 120).
Meanwhile, among the refrigerants compressed in the compressor, the remaining refrigerant that is not branched by the bypass pipe 140 passes through the indoor unit 200 and / or the water heat exchanger 400 via the distributor 300.
That is, in the hot-water circulating system according to the present invention, air and floor heating of the indoor space can be performed even when the outdoor heat exchanger 180 is defrosted, and hot water can be supplied according to the control of the refrigerant flow direction of the distributor.
Hereinafter, a process of heating by using only the heat pump refrigerant cycle without using the refrigerant heating apparatus 700 will be described with reference to FIG.
At this time, the refrigerant heating apparatus 700 guides the refrigerant to circulate without heating.
The overheat prevention valve 722, the bypass valve 142 and the heating expansion valve 740 are shielded and the opening / closing valve 732, the bypass guide valve 144 and the outdoor LEV 102 are opened .
Accordingly, the refrigerant compressed in the compressor 120 is condensed while passing through the indoor unit 200 and / or the water heat exchanger 400 by controlling the refrigerant flow in the distributor 300.
The condensed refrigerant then flows into the outdoor unit 100 after passing through the distributor 300. The refrigerant flowing into the outdoor unit 100 is expanded in the outdoor LEV 102 and is then introduced into the outdoor heat exchanger And then passes through the accumulator 132 and the compressor 120 in sequence.
A part of the refrigerant flowing into the outdoor unit 100 is not introduced into the outdoor heat exchanger 180 but flows into the refrigerant heating unit 700 through the first refrigerant pipe 162.
The refrigerant flowing into the refrigerant heating apparatus 700 can not flow any more because the overheating prevention pipe 720 and the heating expansion valve 740 are shielded and the refrigerant is trapped inside the first circulation pipe 712.
Meanwhile, the refrigerant evaporated through the outdoor heat exchanger 180 flows into the refrigerant heating apparatus 700 through the second refrigerant pipe 164 and the second circulation pipe 714, and then flows into the refrigerant heating means 750, Without heat exchange.
The refrigerant exits the refrigerant heating apparatus 700 through the third circulation pipe 715 and flows through the third refrigerant pipe 166 through the four-way valve 124 and the accumulator 132 to the inside of the compressor 120 And is compressed.
Hereinafter, the refrigerant flow in the heating mode using only the refrigerant heating apparatus 700 after a long period of leaving the hot water circulation system associated with the heat pump cycle will be described with reference to FIG.
The bypass guide valve 144 and the outdoor LEV 102 are opened and the bypass valve 142, the heating expansion valve 740 and the overheat shutoff valve 722 are shielded. The heating source 764 operates to heat the water heating portion 762.
The refrigerant compressed by the compressor 120 flows into the outdoor unit 100 after passing through the distributor 300 and the indoor unit 200 and passes through the outdoor LEV 102 and the outdoor heat exchanger 180 .
However, when the outdoor heat exchanger 180 is left for a long period of time, a lot of refrigerant remains in the interior of the outdoor heat exchanger 180. When the refrigerant heating apparatus 700 alone is used as an evaporator without using the outdoor heat exchanger 180, a refrigerant shortage phenomenon may occur.
Accordingly, the compressed refrigerant of high temperature and high pressure is bypassed to the outdoor heat exchanger (180) through the bypass pipe (140) to circulate the refrigerant.
To this end, the bypass guide valve 144 and the outdoor LEV 102 are kept open to be shielded to block the refrigerant flow, and the bypass valve 142 is opened.
Accordingly, some of the refrigerant compressed in the compressor 120 moves to the outdoor discharge pipe 148 through the bypass pipe 140, and the bypass guide valve 144 and the outdoor LEV 102 are shielded Therefore, the air passes through the outdoor heat exchanger 180 and then passes through the first check valve 199.
The refrigerant then flows into the refrigerant heating apparatus 700 through the first refrigerant pipe 162 and flows through the first circulation pipe 712 and the third circulation pipe 715 to the refrigerant heating means 750 The refrigerant is heated to the refrigerant temperature that can maximize the heating efficiency by passing the refrigerant through the passage.
The refrigerant then flows into the third refrigerant pipe 166 and then passes through the third check valve 167 and sequentially passes through the four-way valve 124, the accumulator 132, and the compressor 120.
On the other hand, a part of the refrigerant passing through the third check valve 167 is branched without passing through the four-way valve 124 and passes through the second check valve 165.
The refrigerant then flows into the refrigerant heating apparatus 700 through the second refrigerant pipe 164 because the boil-pass guide valve 144 is shielded.
The refrigerant flowing into the refrigerant heating apparatus 700 flows along the second circulation pipe 714 and is combined with the first circulation pipe 712. The refrigerant is heated while passing through the refrigerant heating means 750, Lt; / RTI >
Hereinafter, the flow of the refrigerant at the time of the cooling operation using only the heat pump refrigerant cycle using the heat pump interlocking hot water circulation system will be described with reference to FIG.
The refrigerant heating apparatus 700 is not used when the heat pump interlocking hot water circulation system operates in the cooling mode. That is, the refrigerant is not controlled to flow into the refrigerant heating apparatus 700.
Accordingly, the opening / closing valve 732, the overheating shutoff valve 722, the heating expansion valve 740, the bypass valve 142, and the outdoor LEV 102 are shielded and the bypass guide valve 144 is opened .
First, the refrigerant compressed at high temperature and high pressure in the compressor 120 is guided to the second check valve 165 through the four-way valve 124.
The refrigerant recovered to the outdoor unit is limited in flow by the third check valve 167 and is not introduced into the refrigerant heating apparatus 700.
The refrigerant that has passed through the second check valve 165 is not allowed to flow into the refrigerant heating apparatus 700 because the refrigerant is blocked by the opening / closing valve 732, the overheat shutoff valve 722, and the heating expansion valve 740, After passing through the bypass guide valve 144, the refrigerant is condensed while passing through the outdoor heat exchanger 180.
After passing through the first check valve 199 and then guided to the distributor 300, the distributor controls the refrigerant flow direction to guide the refrigerant to the indoor unit or the water heat exchanger 400.
Then, the refrigerant flowing into the outdoor unit (100) passes through the four-way valve (124) and the accumulator (132) and then flows into the compressor (120) and is compressed.
Hereinafter, the water flow when the user desires to use the hot water quickly by using the hot water warming-up device will be described with reference to Fig.
Since the outdoor unit 100, the indoor unit 200, the distributor 300, the water heat exchanger 400 and the hydrothermal heating unit 600 are not used, the inlet shutoff valve 892 and the outflow shutoff valve 894, Only the open state is maintained.
Then, the hot water supply pump 840 and the water heating means 760 are operated.
The water in the hot water supply pipe 820 flows into the water heating means 760 by the pumping action of the hot water supply pump 840 and is heated by the heating source 764 and then flows into the hot water supply pipe 820 To the inside of the water heater 500.
In this process, the cold water temperature sensor TH8 and the hot water temperature sensor TH9 continuously measure the temperature of the water heated by the heating source 764 and the water temperature before the heating, The heating source 764 supplies a higher amount of heat to the inside of the hot water supply pipe 820 when the amount of heat required to meet the required hot water temperature is insufficient.
The water flow sensor 860 senses the flow rate of the water flowing along the hot water pipe 820 to maintain a proper water level.
Therefore, it is preferable that a separate water replenishment unit 822 is further provided at one side of the hot water supply pipe 820 to compensate the water level detected by the water flow sensor 860 when the water flow rate is lower than the set water level Do.
On the other hand, the water flowing into the hot water supply apparatus 500 is heat-exchanged with the water in the hot water tank 510 and is then discharged through the hot water pipe 580 to the outside of the hot water tank 510, The cooled water that has exited the tank 510 is returned to the inside of the water heating means 760 through the hot water pipe 820 because the outflow blocking valve 894 is opened.
At this time, since the hot water supply valve 582 and the heating valve 632 are shielded, the cooled water that has exited the hot water tank 510 flows into the water heat exchanger 760 without flowing into the water heat exchanger 400 .
This circulation of water makes it possible to use hot water quickly using the hot water warming-up device 800.
The scope of the present invention is not limited to the embodiments described above, and many other modifications based on the present invention will be possible to those skilled in the art within the scope of the present invention.
