KR102042218B1 - Heat Pump - Google Patents

Abstract

The heat pump of the present invention includes a compressor for compressing a refrigerant; A compressor suction channel for guiding suction of the refrigerant into the compressor; A compressor discharge channel through which the refrigerant compressed by the compressor is discharged and guided; A first heat exchanger for heat-exchanging air and refrigerant; A second heat exchanger for exchanging water and a refrigerant; A third heat exchanger configured to heat exchange the heat source and the refrigerant; A first four-way valve connected to the compressor suction passage and the compressor discharge passage and connected to the first heat exchanger and the first heat exchanger connection passage; A second four-way valve connected to the compressor suction passage and the compressor discharge passage and connected to the second heat exchanger and the second heat exchanger connection passage; A four-way valve connecting flow path connecting the third heat exchanger to the first four-way valve and the second four-way valve; Space cooling and hot water supply operation, space heating and hot water supply operation, with a simple structure of the first four-way valve and the second four-way valve, including a heat exchanger connecting passage connecting the third heat exchanger to the first heat exchanger and the second heat exchanger; There is an advantage that the cold water withdrawal operation, the hot water withdrawal operation, the space cooling operation, and the space heating operation can be selectively performed as necessary.

Description

Heat Pump

The present invention relates to a heat pump, and more particularly, to a heat pump in which a plurality of four-way valves are connected to a plurality of heat exchangers.

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

The heat pump includes a compressor, a condenser, an expansion device, and an evaporator, and recently, a heat pump type hot water supply device that can be used for hot water supply by heating water with a refrigerant to minimize the consumption of fossil fuels has been developed.

JP 2001-263857 A (2001.9.26)

The heat pump according to the related art has a problem in that water is heat-exchanged with a high temperature refrigerant, and thus the hot water heat exchanger cannot withdraw cold water, and the heat pump may be used only for space cooling and hot water supply, thereby having low utilization.

Heat pump according to the present invention for solving the above problems is a compressor for compressing the refrigerant; A compressor suction channel configured to guide the refrigerant to the compressor; A compressor discharge channel through which the refrigerant compressed by the compressor is discharged and guided; A first heat exchanger for heat-exchanging air and refrigerant; A second heat exchanger for exchanging water and a refrigerant; A third heat exchanger configured to heat exchange the heat source and the refrigerant; A first four-way valve connected to the compressor suction passage and the compressor discharge passage and connected to the first heat exchanger and the first heat exchanger connection passage; A second four-way valve connected to the compressor suction passage and the compressor discharge passage and connected to the second heat exchanger and the second heat exchanger connection passage; A four-way valve connecting flow path connecting the third heat exchanger to the first four-way valve and the second four-way valve; And a heat exchanger connection passage connecting the third heat exchanger to the first heat exchanger and the second heat exchanger.

The compressor suction channel comprises: a first suction channel connected to the compressor; A second suction passage connecting the first four-way valve and the first suction passage; It may include a third suction passage for connecting the second four-way valve and the first suction passage.

The compressor discharge channel comprises: a first discharge channel connected to the compressor; A second discharge passage connecting the first discharge passage and the first four-way valve; It may include a third discharge passage connecting the first discharge passage and the second four-way valve.

The four-way valve connection flow path includes a first connection flow path connected to the first heat exchanger, and a second connection flow path connecting the first connection flow path and the first four-way valve; It may include a third connection channel for connecting the first connection channel and the second four-way valve.

The apparatus may further include a one-way valve installed in the third connection channel to prevent the refrigerant of the second connection channel from flowing to the second four-way valve through the third connection channel.

The heat exchanger connection passage and a first heat exchanger connection passage connected to the first heat exchanger; A second heat exchanger connection passage connected to the second heat exchanger; And a third heat exchanger connection channel connected to the first heat exchanger connection channel and the second heat exchanger connection channel and connected to the third heat exchanger.

A first expansion valve installed in the first heat exchanger connection passage; A second expansion valve installed in the second heat exchanger connection passage; The apparatus may further include a third expansion valve installed in the third heat exchanger connection passage.

According to the present invention, the simple four-way valve and the second four-way valve require space cooling and hot water operation, space heating and hot water operation, cold water discharge operation, hot water discharge operation, space cooling operation, and space heating operation. There is an advantage that can be selectively carried out according to.

In addition, there is an advantage that the second heat exchanger for exchanging water and refrigerant can withdraw the cold water, and the heat pump can be used for applications other than heating and hot water supply.

In addition, in consideration of the space cooling load, the space heating load, the cold water discharge load, and the hot water discharge load, there is an advantage that efficient operation is possible.

1 is a block diagram showing a refrigerant flow when the heat pump according to an embodiment of the present invention is space cooling and hot water supply,
2 is a configuration diagram showing a refrigerant flow when the heat pump according to one embodiment of the present invention is space heating and hot water supply,
3 is a block diagram showing a refrigerant flow when the heat pump according to an embodiment of the present invention is cold water outlet,
4 is a block diagram showing a refrigerant flow when the heat pump according to an embodiment of the present invention is hot water withdrawal,
5 is a configuration diagram showing a refrigerant flow when the heat pump according to one embodiment of the present invention in space cooling,
Figure 6 is a block diagram showing a refrigerant flow when the heat pump according to an embodiment of the present invention the space heating.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a refrigerant flow when one embodiment of the heat pump according to the present invention is space cooling and hot water supply, and FIG. 2 is a refrigerant flow when an embodiment of the heat pump according to the present invention is space heating and hot water supply. 3 is a configuration diagram showing a refrigerant flow when one embodiment of the heat pump according to the present invention is cold water discharge, Figure 4 is a configuration diagram showing the refrigerant flow when one embodiment of the heat pump according to the present invention is hot water output Figure 5 is a block diagram showing the flow, Figure 5 is a heat pump according to one embodiment of the present invention is a block diagram showing the refrigerant flow when cooling the space, Figure 6 is a heat pump according to one embodiment of the present invention is a refrigerant when space heating A flow diagram is shown.

1 to 6, a heat pump includes a compressor 1 for compressing a refrigerant; A compressor suction passage (2) which guides the refrigerant to the compressor; A compressor discharge passage 3 through which the refrigerant compressed by the compressor is discharged and guided; A first heat exchanger (4) for exchanging air and refrigerant; A second heat exchanger (5) for exchanging water and refrigerant; A third heat exchanger 6 for exchanging heat between the heat source and the refrigerant; A first four-way valve 7 connected to the compressor suction passage 2 and the compressor discharge passage 3 and connected to the first heat exchanger 4 and the first heat exchanger connection passage 71; A second four-way valve (8) connected to the compressor suction passage (2) and the compressor discharge passage (3) and connected to the second heat exchanger (5) and the second heat exchanger connection passage (81); A four-way valve connecting flow path 9 connecting the third heat exchanger 6 to the first four-way valve 7 and the second four-way valve 8; And a heat exchanger connection passage 10 connecting the third heat exchanger 6 to the first heat exchanger 4 and the second heat exchanger 5.

 The compressor 1 may suck and compress the refrigerant in the compressor suction passage 2, and discharge the compressed refrigerant into the compressor discharge passage 3.

The compressor suction passage 2 may be configured to stack the suction passage through which the refrigerant passes. The compressor suction passage 2 includes a first suction passage 21 connected to the compressor 1; A second suction passage 22 connecting the first four-way valve 7 and the first suction passage 21; It may include a third suction flow path 23 connecting the second four-way valve 8 and the first suction flow path (21). In the compressor suction passage 2, the first suction passage 21 may be branched into the second suction passage 22 and the third suction passage 23. The refrigerant guided from the first four-way valve 7 to the second suction channel 22 may be sucked into the compressor 1 through the first suction channel 21. The refrigerant guided from the second four-way valve 8 to the third suction passage 23 may be sucked into the compressor 1 through the first suction passage 21.

 The compressor discharge passage 3 may be configured to branch the discharge passage through which the refrigerant passes. The compressor discharge passage 3 includes a first discharge passage 31 connected to the compressor 1; A second discharge passage 32 connecting the first discharge passage 31 and the first four-way valve 7; It may include a third discharge passage 33 for connecting the first discharge passage 31 and the second four-way valve (8). In the compressor discharge passage 3, the second discharge passage 32 and the third discharge passage 33 may be laminated as the first discharge passage 31. The refrigerant discharged from the compressor 1 may pass through the first discharge passage 31 and the second discharge passage 32 in order to flow into the first upper valve 7. The refrigerant discharged from the compressor 1 may sequentially pass through the first discharge passage 31 and the third discharge passage 33 and flow into the second three-way valve 8.

The first heat exchanger 4 may be configured as a refrigerant-air heat exchanger for cooling or heating air using a refrigerant. The first heat exchanger 4 may be an indoor heat exchanger that heat-exchanges air and refrigerant in the room to be cooled and heated. The heat pump may further include an indoor fan 41 which flows the indoor air to be cooled and heated to the first heat exchanger 4 and then discharges the air back into the room. The first heat exchanger 4 may comprise a refrigerant tube through which the refrigerant passes. The first heat exchanger 4 may further include a heat transfer fin installed in the refrigerant tube, and may be configured as a fin-tube type heat exchanger. The first heat exchanger 4 may be installed in the indoor unit together with the indoor fan 41.

The second heat exchanger 5 may be configured as a refrigerant-water heat exchanger for cooling or heating water using a refrigerant. The second heat exchanger 5 may include a refrigerant passage through which the refrigerant passes and a water passage through which water passes. The second heat exchanger 5 may be configured as a plate heat exchanger in which the refrigerant passage and the water passage are disposed with the heat transfer member interposed therebetween. The second heat exchanger 5 may be a hot water heat exchanger that heats water to be used for hot water supply. The heat pump may include a water tank 51 in which water exchanged with the refrigerant in the second heat exchanger 5 is contained. The second heat exchanger (5) has an inlet pipe (52) in which water is supplied to the water flow path of the second heat exchanger (5), and the water output from which the water exchanged with the refrigerant in the water flow path of the second heat exchanger (4) is discharged. Pipe 53 may be connected. One of the inlet pipe 52 and the outlet pipe 53 may be provided with a water pump 54 for pumping water. The inlet pipe 52 and the outlet pipe 53 may connect the water flow paths of the water tank 51 and the second heat exchanger 4. When the water pump 54 is driven, water may flow into the water flow path of the second heat exchanger 5 through the inlet pipe 52, and the water passing through the water flow path of the second heat exchanger 5 may be a refrigerant. Heat exchange with and heated or cooled, and then may be moved to the water tank 51 through the water outlet pipe (53). The water tank 51 may be connected to a water supply flow path for guiding the water of the water tank 51 to be used in a bathroom or a kitchen, or a water supply flow path for guiding water from the water tank 51 to the bottom pipe. When the second heat exchanger 5 functions as a condenser for condensing the refrigerant, the water tank 51 may contain hot water, which is hot water, and when the second heat exchanger 5 functions as an evaporator to evaporate the refrigerant, The water tank 51 may contain cooling water, which is low temperature water.

The third heat exchanger 6 may have a refrigerant passage through which the refrigerant passes. The heat pump may be the first heat exchanger 4 and the second heat exchanger 5 may be a utilization side heat exchanger (ie, a load side heat exchanger), and the third heat exchanger 6 may be a non-use side heat exchanger (ie Heat source side heat exchanger). The third heat exchanger 6 may function as an evaporator when at least one of the first heat exchanger 4 and the second heat exchanger 5 functions as a condenser, and the first heat exchanger 4 and the second When at least one of the heat exchangers 5 functions as an evaporator, it may function as a condenser. The third heat exchanger 6 may be constituted by a geothermal heat exchanger using a geothermal heat source, an outdoor heat exchanger using outdoor air as a heat source, or a hydrothermal source heat exchanger using a heat source as a heat source. When the third heat exchanger 6 is configured as a geothermal heat exchanger, the third heat exchanger 6 may be installed to be buried underground so that the heat of the basement may be absorbed by the refrigerant or radiate heat of the refrigerant underground. When the third heat exchanger 6 is configured as an outdoor heat exchanger, the heat pump may further include an outdoor fan (not shown) for passing outdoor air to the third heat exchanger 6. When the third heat exchanger 6 is configured as an outdoor heat exchanger, the heat of the outdoor air may be absorbed by the coolant or radiate the heat of the coolant to the outdoor air. When the third heat exchanger 6 is configured as a heat source heat exchanger, the third heat exchanger 6 may be connected to a cooling tower supplying a heat source and a water pipe. The third heat exchanger 6 may endotherm heat of the heat receiving source or radiate heat of the refrigerant to the heat receiving source. When the third heat exchanger 6 is configured as a heat source heat exchanger, the third heat exchanger 6 may be configured as a plate heat exchanger in which a heat source path through which the heat source passes, and a refrigerant path through which the refrigerant passes, are disposed between the heat transfer members.

The four-way valve connecting passage 9 includes a first connecting passage 91 connected to the heat source heat exchanger 6; A second connection channel 92 connecting the first connection channel 91 and the first four-way valve 7; It may include a third connecting passage 93 for connecting the first connecting passage 91 and the second four-way valve (8).

 The heat pump includes a one-way valve 94 installed in the third connection passage 93 to prevent the refrigerant in the second connection passage 92 from flowing to the second four-way valve 8 through the third connection passage 93. It may include. The refrigerant guided from the second four-way valve 8 to the third connection channel 93 may flow through the one-way valve 94 to the first connection channel 91.

 The heat exchanger connection passage 10 may include a first heat exchanger connection passage 101 connected to the first heat exchanger 4; A second heat exchanger connection passage 102 connected to the second heat exchanger 5; It may include a third heat exchanger connection passage 103 connected to the first heat exchanger connection passage 101 and the second heat exchanger connection passage 102 and connected to the third heat exchanger 6.

  The heat pump includes a first expansion valve 104 installed in the first heat exchanger connection passage 101; A second expansion valve (105) installed in the second heat exchanger connection passage (102); It may include a third expansion valve 106 installed in the third heat exchanger connection passage (103).

The first four-way valve 7 guides the refrigerant introduced from the second discharge passage 32 to the second connection passage 92 and guides the refrigerant introduced from the first heat exchanger connection passage 71 to the second suction passage. It may have a first mode of guiding to 22. The first four-way valve 7 guides the refrigerant introduced from the second discharge passage 32 to the first heat exchanger connection passage 71 and guides the refrigerant introduced from the second connection passage 92 to the second suction passage. It may have a second mode of guiding to 22. The first four-way valve 7 may be selected as one of the first mode and the second mode.

The second four-way valve 8 guides the refrigerant introduced from the third discharge passage 33 to the second heat exchanger connection passage 81 and guides the refrigerant introduced from the third connection passage 93 to the third suction passage. It may have a first mode of guiding to 23. The second four-way valve 8 guides the refrigerant introduced from the third discharge passage 33 to the third connection passage 93 and guides the refrigerant introduced from the second heat exchanger connection passage 81 to the third suction passage. It may have a second mode of guiding to 23. The second four-way valve 8 may be selected from one of the first mode and the second mode.

Hereinafter, each operation mode of the heat pump will be described.

The heat pump has a cooling load of the indoor unit, a hot water load of the water tank 51, and can be operated in a space cooling and hot water mode. Here, the cooling load may be a load in which the indoor temperature of the indoor unit is air conditioner is equal to or higher than the cooling set temperature, and the load detected by the water tank 51 or the temperature of the water discharged from the water tank 51 may be a load lower than or equal to the set temperature. When the heat pump is space cooling and hot water supply, the compressor 1 can be driven, the first four-way valve 7 can be adjusted to the first mode, and the second four-way valve 8 is adjusted to the first mode. Can be. When the heat pump is space cooling and hot water supply, the indoor fan 41 may be driven, and the water pump 54 may be driven. When the heat pump is space cooling and hot water supply, the opening degree of the first expansion valve 104 expands the refrigerant may be adjusted. When the heat pump is space cooling and hot water supply, the second expansion valve 105 and the second expansion valve 106 can be fully opened.

When space cooling and hot water supply, the compressor 1 can compress the refrigerant, and the refrigerant compressed by the compressor 1 is the first four-way valve 7 and the second four-way valve 8 as shown in FIG. Can be dispersed. Some of the refrigerant compressed by the compressor 1 may enter the third heat exchanger 6 through the first four-way valve 7, and pass through the third heat exchanger 6 while passing through the third heat exchanger 6. Can be condensed. The remaining of the refrigerant compressed by the compressor (1) may be introduced into the second heat exchanger (5) through the second four-way valve (8), the second heat exchanger (5) while passing through the second heat exchanger (5) Heat can be condensed by heat exchange with water. The refrigerant condensed in the third heat exchanger 6 and the refrigerant condensed in the second heat exchanger 5 may be expanded in the first expansion valve 104 after being combined in the first heat exchanger connecting passage 101. The refrigerant expanded in the first expansion valve 104 may exchange heat with air and evaporate while passing through the first heat exchanger 4. The refrigerant evaporated in the first heat exchanger 4 may be sucked into the compressor 1 through the first four-way valve 7. In the space cooling and hot water supply as described above, the indoor air may be cooled by heat exchange with a refrigerant passing through the first heat exchanger 4, and may be blown into the room to cool the indoor space. During the space cooling and hot water supply as described above, the water in the water tank 51 may be heated by heat exchange with the refrigerant passing through the second heat exchanger 5, and may be introduced into the water tank 51 while being heated. That is, during space cooling and hot water supply, the refrigerant may be condensed in the second heat exchanger 5 and the third heat exchanger 6, may be evaporated in the first heat exchanger 4, and the indoor space cooling and hot water supply may be Can be carried out together.

 The heat pump has a heating load of the indoor unit, a hot water load of the water tank 51, and can be operated in the space heating and hot water mode. Here, the heating load may be a load in which the indoor temperature of the indoor unit is controlled to be equal to or lower than a heating set temperature, or may be a load in which the temperature detected by the water tank 51 or the temperature of the water discharged from the water tank 51 is lower than or equal to the set temperature. When the heat pump is space heating and hot water supply, the compressor 1 can be driven, the first four-way valve 7 can be adjusted to the second mode, and the second four-way valve 8 is adjusted to the first mode. Can be. When the heat pump is space heating and hot water supply, the indoor fan 41 may be driven, and the water pump 54 may be driven. When the heat pump is space heating and hot water supply, the opening degree of the third expansion valve 106 can expand the refrigerant. When the heat pump is space heating and hot water supply, the first expansion valve 104 and the second expansion valve 105 can be fully opened.

When space heating and hot water supply, the compressor 1 can compress the refrigerant, and the refrigerant compressed in the compressor 1 is the first four-way valve 7 and the second four-way valve 8 as shown in FIG. Can be dispersed. Some of the refrigerant compressed by the compressor 1 may flow through the first four-way valve 7 to the first heat exchanger 4, and may be condensed by heat exchange with indoor air while passing through the first heat exchanger 4. Can be. The remaining of the refrigerant compressed by the compressor (1) may be introduced into the second heat exchanger (5) through the second four-way valve (8), the second heat exchanger (5) while passing through the second heat exchanger (5) Heat can be condensed by heat exchange with water. The refrigerant condensed in the first heat exchanger 4 and the refrigerant condensed in the second heat exchanger 4 may be expanded in the third expansion valve 106 after being combined in the third heat exchanger connecting passage 103. The refrigerant expanded in the third expansion valve 106 may be evaporated in the third heat exchanger 6. The refrigerant evaporated in the third heat exchanger 6 may be sucked into the compressor 1 through the first four-way valve 7. In the space heating and hot water supply as described above, the indoor air may be heated by heat exchange with the refrigerant passing through the first heat exchanger 4, and may be blown into the room to heat the indoor space. In the space heating and hot water supply as described above, the water in the water tank 51 may be heated by heat exchange with the refrigerant passing through the second heat exchanger 5, and may be introduced into the water tank 51 while being heated. That is, during space heating and hot water supply, the refrigerant may be condensed in the first heat exchanger 4 and the second heat exchanger 5, and may be evaporated in the third heat exchanger 6, and the indoor space heating and hot water supply may be Can be carried out together.

The heat pump has no heating load and cooling load of the indoor unit, has a cold water load of the water tank 51, and can be operated in a cold water discharge mode. Here, when there is no heating load and cooling load, the indoor unit may be turned off, or the indoor temperature may be lower than the cooling set temperature and higher than the heating set temperature. The cold water load may be a load at which the temperature sensed by the water tank 51 or the temperature of the water withdrawn from the water tank 51 is equal to or higher than the cold water water set temperature. When the heat pump is cold water outlet, the compressor 1 can be driven, the first four-way valve 7 can be adjusted to the first mode, and the second four-way valve 8 can be adjusted to the second mode. have. When the heat pump is cold water outlet, the indoor fan 41 may be stopped, and the water pump 54 may be driven. The first expansion valve 104 may be closed because the heat pump does not perform space cooling and heating when cold water is discharged. When the heat pump is cold water outlet, the opening degree of the second expansion valve 105 may expand the refrigerant. When the heat pump is cold water outlet, it is possible that the third expansion valve 106 is fully open.

 When cold water is discharged, the compressor 1 may compress the refrigerant, and the refrigerant compressed in the compressor 1 may be transferred to the first four-way valve 7 and the second four-way valve 8, as shown in FIG. Can be distributed. Some of the refrigerant compressed by the compressor 1 may flow through the first four-way valve 7 to the third heat exchanger 6, and the remaining of the refrigerant compressed by the compressor 1 may be the second four-way valve ( 8) and the one-way valve 94 may be flowed to the third heat exchanger (6). The refrigerant flowing into the third heat exchanger 6 by the first four-way valve 7 and the refrigerant flowing into the third heat exchanger 6 by the second four-way valve 8 are separated from the first connection channel 91. After being combined it can be flowed to the third heat exchanger 6 and condensed while passing through the third heat exchanger 6. The refrigerant condensed in the third heat exchanger 6 may flow to the second expansion valve 105 to expand in the second expansion valve 105, and then flow to the second heat exchanger 5. The refrigerant flowing into the second heat exchanger 5 may be exchanged with water and evaporated while passing through the second heat exchanger 5. The refrigerant evaporated in the second heat exchanger 5 may be sucked into the compressor 1 through the second four-way valve 8. When the cold water is discharged as described above, the water in the water tank 51 may be cooled by heat-exchanging with the refrigerant passing through the second heat exchanger 5, and may be introduced into the water tank 51 while being cooled. That is, when cold water is discharged, the refrigerant may be condensed in the third heat exchanger 6, may be evaporated in the second heat exchanger 5, and cold water may be discharged from the second heat exchanger 5.

The heat pump may be operated in the hot water discharge mode (hot water supply mode) if there is no heating load and cooling load of the indoor unit and there is a hot water discharge load of the water tank 51. Here, when there is no heating load and cooling load, the indoor unit may be turned off, or the indoor temperature may be lower than the cooling set temperature and higher than the heating set temperature. The hot water discharge load may be a load at which the temperature sensed by the water tank 51 or the temperature of the water discharged from the water tank 51 is equal to or less than the hot water discharge water set temperature.

When the heat pump is hot water output, the compressor 1 can be driven, the first four-way valve 7 can be adjusted to the second mode, and the second four-way valve 8 can be adjusted to the first mode. have. When the heat pump is hot water output, the indoor fan 41 may be stopped, and the water pump 54 may be driven. Since the heat pump does not perform space cooling and heating when the hot water is discharged, the first expansion valve 104 may be closed. When the heat pump is hot water output, the first expansion valve 104 may be opened at a minimum opening degree, at a set opening degree of 5 to 15% of the maximum opening degree, or open / closed at a setting cycle to prevent liquid refrigerant inflow. When the heat pump is hot water outlet, the second expansion valve 105 may be fully open. When the heat pump is hot water withdrawal, the opening degree can be adjusted to the opening degree through which the third expansion valve 106 expands the refrigerant.

When the hot water is discharged, the compressor 1 may compress the refrigerant, and the refrigerant compressed in the compressor 1 passes through the second four-way valve 8, as shown in FIG. 4, to the second heat exchanger 5. ), And the refrigerant flowing into the second heat exchanger 5 may be condensed by heat exchange with water while passing through the second heat exchanger 5. The refrigerant condensed in the second heat exchanger 5 may be expanded in the third expansion valve 106, and the refrigerant expanded in the third expansion valve 106 may flow into the third heat exchanger 6. The refrigerant flowing into the third heat exchanger 6 may be evaporated while passing through the third heat exchanger 6. The refrigerant evaporated in the third heat exchanger 6 may be sucked into the compressor 1 through the first four-way valve 7. When the hot water is discharged as described above, the water in the water tank 51 may be heated by heat exchange with the refrigerant passing through the second heat exchanger 5, and may be introduced into the water tank 51 in a heated state. That is, when hot water is discharged, the refrigerant may be condensed in the second heat exchanger 5, may be evaporated in the third heat exchanger 6, and hot water may be discharged from the second heat exchanger 5.

The heat pump may be operated in the space cooling mode when there is a cooling load of the indoor unit and there is no hot water discharge load or cold water discharge load of the water tank 51. When the heat pump is space cooling, the compressor 1 can be driven, the first four-way valve 7 can be adjusted to the first mode, and the second four-way valve 8 can be adjusted to the second mode. have. When the heat pump is space cooling, the indoor fan 41 may be driven, and the water pump 54 may be stopped. When the heat pump is space cooling, the opening degree of the first expansion valve 104 can be adjusted to the opening degree to expand the refrigerant. When the heat pump is space cooling, the second expansion valve 105 may be closed because it does not discharge hot water or cold water. When the heat pump is space-cooled, the second expansion valve 105 may be opened to the minimum opening degree, the opening degree of 5 to 15% of the maximum opening degree, or open / closed at a setting cycle to prevent liquid refrigerant inflow. When the heat pump is space cooling, the third expansion valve 106 can be fully opened.

 When space cooling, the compressor 1 can compress the refrigerant, and the refrigerant compressed in the compressor 1 is transferred to the first four-way valve 7 and the second four-way valve 8, as shown in FIG. Can be dispersed. Some of the refrigerant compressed by the compressor 1 may flow through the first four-way valve 7 to the third heat exchanger 6, and the remaining of the refrigerant compressed by the compressor 1 may be the second four-way valve ( 8) and the one-way valve 94 may be flowed to the third heat exchanger (6). The refrigerant flowing into the third heat exchanger 6 by the first four-way valve 7 and the refrigerant flowing into the third heat exchanger 6 by the second four-way valve 8 are separated from the first connection channel 91. After being combined it can be flowed to the third heat exchanger 6 and condensed while passing through the third heat exchanger 6. The refrigerant condensed in the third heat exchanger 6 may be expanded in the first expansion valve 104, and the refrigerant expanded in the first expansion valve 104 may pass through the first heat exchanger 4, and may be separated from the indoor air. Heat can be evaporated. The refrigerant evaporated in the first heat exchanger 4 may be sucked into the compressor 1 through the first four-way valve 7. That is, during space cooling, the refrigerant may be condensed in the third heat exchanger 6, evaporated in the first heat exchanger 4, and cold air heat-exchanged with the first heat exchanger 5 is discharged into the space. Can cool the room.

 The heat pump may be operated in the space heating mode when there is a heating load of the indoor unit and there is no hot water discharge load or cold water discharge load of the water tank 51. When the heat pump is space heating, the compressor 1 can be driven, the first four-way valve 7 can be adjusted to the second mode, and the second four-way valve 8 can be adjusted to the first mode. have. When the heat pump is space heating, the indoor fan 41 can be driven and the water pump 54 can be stopped. When the heat pump is space heating, the opening degree can be adjusted to the opening degree through which the third expansion valve 106 expands the refrigerant. When the heat pump is space heating, the second expansion valve 105 may be closed because it does not discharge hot or cold water. When the heat pump is space-cooled, the second expansion valve 105 may be opened to the minimum opening degree, the opening degree of 5 to 15% of the maximum opening degree, or open / closed at a setting cycle to prevent liquid refrigerant inflow. When the heat pump is space cooling, the first expansion valve 104 can be fully opened.

When space heating, the compressor 1 can compress the refrigerant, and the refrigerant compressed in the compressor 1 passes through the first four-way valve 7, as shown in FIG. ), And the refrigerant flowed into the first heat exchanger (4) may be condensed by heat exchange with the room air while passing through the first heat exchanger (4). The refrigerant condensed in the first heat exchanger 4 may be expanded in the third expansion valve 106, and the refrigerant expanded in the third expansion valve 106 may flow to the third heat exchanger 6. The refrigerant flowing into the third heat exchanger 6 may be evaporated while passing through the third heat exchanger 6. The refrigerant evaporated in the third heat exchanger 6 may be sucked into the compressor 1 through the first four-way valve 7. That is, during space cooling, the refrigerant may be condensed in the first heat exchanger 4, evaporated in the third heat exchanger 6, and warm air heat-exchanged with the first heat exchanger 4 is discharged into the space. To heat the room.

1: compressor 2: compressor suction flow path
3: compressor discharge path 4: first heat exchanger
5: second heat exchanger 6: third heat exchanger
7: 1st four-way valve 8: 2nd four-way valve
9: Four-way valve connection channel 10: Compressor connection channel
104: first expansion valve 105: second expansion valve
106: third expansion valve

Claims (7)

A compressor for compressing the refrigerant;
A compressor suction channel configured to guide the refrigerant to the compressor;
A compressor discharge channel through which the refrigerant compressed by the compressor is discharged and guided;
A first heat exchanger for heat-exchanging air and refrigerant;
A second heat exchanger for exchanging water and a refrigerant;
A third heat exchanger configured to heat exchange the heat source and the refrigerant;
A first four-way valve connected to the compressor suction passage and the compressor discharge passage and connected to the first heat exchanger and the first heat exchanger connection passage;
A second four-way valve connected to the compressor suction passage and the compressor discharge passage and connected to the second heat exchanger and the second heat exchanger connection passage;
A four-way valve connecting flow path connecting the third heat exchanger to the first four-way valve and the second four-way valve;
A heat exchanger connecting passage connecting the third heat exchanger to the first heat exchanger and the second heat exchanger,
The compressor discharge passage
A first discharge passage connected to the compressor;
A second discharge passage connecting the first discharge passage and the first four-way valve;
And a third discharge passage connecting the first discharge passage and the second four-way valve. The method of claim 1,
The compressor suction flow path
A first suction passage connected to the compressor;
A second suction passage connecting the first four-way valve and the first suction passage;
And a third suction passage connecting the second four-way valve and the first suction passage. delete The method of claim 1,
The four-way valve connecting flow path
A first connection channel connected to the third heat exchanger;
A second connection channel connecting the first connection channel and the first four-way valve;
And a third connection channel connecting the first connection channel and the second four-way valve. The method of claim 4, wherein
And a one-way valve installed in the third connection channel to prevent the refrigerant in the second connection channel from flowing to the second four-way valve through the third connection channel. The method of claim 1,
The heat exchanger connection passage
A first heat exchanger connection passage connected to the first heat exchanger;
A second heat exchanger connection passage connected to the second heat exchanger;
And a third heat exchanger connection channel connected to the first heat exchanger connection channel and the second heat exchanger connection channel and connected to the third heat exchanger. The method of claim 6,
A first expansion valve installed in the first heat exchanger connection passage;
A second expansion valve installed in the second heat exchanger connection passage;
And a third expansion valve installed in the third heat exchanger connection passage.

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