JP6016603B2 - Air conditioner and heating unit - Google Patents

Description

  The present invention relates generally to an air conditioner and a heating unit, and more particularly to an air conditioner having a function of heating a fluid to be heated, and a heating unit that can be assembled to such an air conditioner. .

  With respect to conventional air conditioners, for example, Japanese Patent Application Laid-Open No. 2007-198708 discloses a hybrid hot water supply system that can be installed in a small space at a low cost and that improves workability (patent). Reference 1). The hybrid hot-water supply system disclosed in Patent Literature 1 includes a first hot-water supply tank that stores hot water heated by a heat pump solar collector, and a second hot-water supply tank that stores hot water heated by a heat pump.

  Japanese Patent Application Laid-Open No. 2011-47582 discloses a solar hot water supply system provided with a heat pump backup heat source for the purpose of increasing the energy saving rate (Patent Document 2). The solar water heating system disclosed in Patent Document 2 includes a hot water storage tank that stores hot water heated by solar heat in a heat collector, and a heat pump that supplies hot water to the hot water storage tank when the amount of hot water collected in the heat collector is insufficient. Is provided.

  Japanese Patent Application Laid-Open No. 2011-247465 discloses a hot water supply system for the purpose of shortening the time for stopping hot water supply and avoiding complication and change of the control system (Patent Document 3). ). The hot water supply system disclosed in Patent Document 3 includes a heat collection tank that stores hot water heated using solar heat, and a hot water storage tank that stores hot water heated by a heat pump.

  Japanese Patent Application Laid-Open No. 2009-281439 discloses an air conditioning / hot water supply system for the purpose of making solar heat available even when the temperature level of solar heat collected by a solar heat collector is not so high. (Patent Document 4). In the air conditioning / hot water supply system disclosed in Patent Document 4, a hot water supply circuit for heating water stored in a heat collection tank by solar heat collected by a solar heat collector is provided in an outdoor unit. .

JP 2007-198708 A JP 2011-47582 A JP 2011-247465 A JP 2009-281439 A

  As disclosed in Patent Documents 1 to 4 above, a hot water supply system using heating by solar heat and heating by a heat pump is known. However, conventional hot water supply systems tend to be large in size and expensive.

  Therefore, an object of the present invention is to solve the above-described problems, and to provide a small and inexpensive air conditioner and a heating unit that can be assembled to the air conditioner.

  The air conditioner according to the present invention is an air conditioner having a function of heating a fluid to be heated. The air conditioner accommodates a heat exchanger that heats the heated fluid by performing heat exchange between the refrigerant guided from the refrigeration circuit constituting the heat pump cycle and the heated fluid, and a heat exchanger, An outdoor unit housing installed outside, and a passage forming member that is provided on the outer surface of the outdoor unit housing, forms a passage through which the heated fluid flows, and heats the heated fluid by receiving heat from sunlight. Prepare.

  According to the air conditioner configured as described above, a function of heating the heated fluid by providing a passage forming member for heating the heated fluid using sunlight on the outer surface of the outdoor unit housing. The air conditioner having the above can be configured small and inexpensively.

  Preferably, the passage forming member is provided so as to be in surface contact with the outer surface of the outdoor unit housing. According to the air conditioner configured as described above, heat can be more efficiently transmitted from the outdoor unit housing heated by receiving sunlight toward the heated fluid flowing through the passage forming member. it can.

  Preferably, the outdoor unit housing has a top surface and a front surface on which a ventilation port for introducing outdoor air is formed. The passage forming member is provided so as to cover the top surface and to cover the front surface while avoiding the vent hole. According to the air conditioner configured as described above, the capacity of the heated fluid flowing through the passage forming member can be set larger while suppressing an increase in the size of the outdoor unit casing.

  Preferably, the heat exchanger is an outdoor heat exchanger that is provided on the path of the refrigeration cycle and performs heat exchange between the refrigerant and the outdoor air. The air conditioner further includes a fluid circulation pipe connected to the passage forming member and through which the fluid to be heated flows. The fluid circulation pipe is routed so that heat can be exchanged between the fluid to be heated and the refrigerant flowing through the outdoor heat exchanger.

  According to the air conditioner thus configured, the fluid to be heated is heated using the outdoor heat exchanger provided on the path of the refrigeration cycle.

  Preferably, the passage forming member is made of glass. According to the air conditioner configured as described above, the passage forming member that heats the fluid to be heated by receiving heat from sunlight is formed of glass.

  Preferably, the passage forming member is made of resin or metal. According to the air conditioner configured as described above, the passage forming member that heats the fluid to be heated by receiving heat from sunlight is formed of resin or metal.

  Preferably, the surface of the passage forming member is colored in an endothermic color. According to the air conditioner configured as described above, the fluid to be heated can be further heated by increasing the efficiency of heat absorption from sunlight to the passage forming member.

  Preferably, the passage forming member is detachably attached to the outdoor unit housing. According to the air conditioner configured as described above, the passage forming member can be assembled to or removed from the air conditioner as necessary.

  A heating unit according to the present invention includes a heat exchanger that heats a heated fluid by exchanging heat between a refrigerant guided from a refrigeration circuit constituting a heat pump cycle and the heated fluid, and a heat exchanger. It is a heating unit that can be assembled to an air conditioner having a function of heating a fluid to be heated. The heating unit includes a passage forming member that is provided on the outer surface of the outdoor unit casing and forms a passage through which the fluid to be heated flows.

  According to the heating unit configured as described above, the air conditioner in which the heating unit is assembled can be configured to be small and inexpensive.

  As described above, according to the present invention, a small and inexpensive air conditioner and a heating unit that can be assembled to the air conditioner can be provided.

It is a figure which shows the circuit structure of the air conditioner with the hot water supply function in Embodiment 1 of this invention. It is a perspective view which shows the external appearance of the outdoor unit in FIG. FIG. 2 is an exploded view of the outdoor unit in FIG. 1. It is a figure which shows the internal structure of the channel | path formation board in FIG. 2 and FIG. It is another figure which shows the internal structure of the channel | path formation board in FIG. 2 and FIG. It is another figure which shows the internal structure of the channel | path formation board in FIG. 2 and FIG. It is a perspective view which shows the structure inside the outdoor unit of the air conditioner in Embodiment 2 of this invention. It is a perspective view which shows the refrigerant | coolant piping and water piping which were provided in the outdoor unit in FIG. It is sectional drawing which shows the refrigerant | coolant piping and water piping along the IX-IX line in FIG. It is a figure which shows the circuit structure of the air conditioner in Embodiment 3 of this invention.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

(Embodiment 1)
1 is a diagram showing a circuit configuration of an air conditioner with a hot water supply function according to Embodiment 1 of the present invention.

  Referring to FIG. 1, air conditioner 10 in the present embodiment has a hot water supply function. The air conditioner 10 may be an air conditioner having a cooling / heating function or an air conditioner dedicated to cooling.

  The air conditioner 10 constitutes a heat pump cycle as its circuit configuration, and has a refrigeration circuit 21 in which a refrigerant circulates and a hot water supply circuit 31 in which water (for example, tap water) as a fluid to be heated flows. The water flowing through the hot water supply circuit 31 is heated by heat exchange with the refrigerant circulating in the refrigeration circuit 21 and by receiving heat from sunlight.

  A refrigerant for cooling the indoor space circulates in the refrigeration circuit 21. For example, HC (hydrocarbon) or HFC (hydrofluorocarbon) is used as the refrigerant. The refrigeration circuit 21 includes a refrigerant circulation path 21p that forms an annular circulation path, and a refrigerant branch path 21q that branches from the refrigerant circulation path 21p.

  The refrigeration circuit 21 is provided with an indoor heat exchanger 25, an outdoor heat exchanger 23, a compressor 22 and an expansion valve 24. The indoor heat exchanger 25, the outdoor heat exchanger 23, the compressor 22 and the expansion valve 24 are provided on the refrigerant circulation path 21p. In FIG. 1, the flow direction of the refrigerant during cooling in the refrigeration circuit 21 is indicated by arrows.

  The indoor heat exchanger 25 exchanges heat between the refrigerant circulating in the refrigeration circuit 21 and the air in the indoor space. The indoor side heat exchanger 25 is provided in the indoor unit 14 installed indoors. The indoor unit 14 is further provided with a fan 27 for supplying room air to the indoor heat exchanger 25. The fan 27 is typically a sirocco fan.

  The outdoor heat exchanger 23 performs heat exchange between the refrigerant circulating in the refrigeration circuit 21 and outdoor air. The outdoor heat exchanger 23 is provided in the outdoor unit 12 installed outside. The outdoor unit 12 is further provided with a fan 26 for supplying outdoor air to the outdoor heat exchanger 23. The fan 26 is typically a propeller fan.

  The compressor 22 is disposed between the indoor side heat exchanger 25 and the outdoor side heat exchanger 23 on the refrigerant circulation path 21p. The compressor 22 compresses the refrigerant sent from the indoor heat exchanger 25. The expansion valve 24 is disposed between the outdoor heat exchanger 23 and the indoor heat exchanger 25 on the refrigerant circulation path 21p. The expansion valve 24 is disposed on the opposite side of the compressor 22 with the indoor heat exchanger 25 and the outdoor heat exchanger 23 interposed therebetween. The expansion valve 24 depressurizes the refrigerant sent from the outdoor heat exchanger 23. The compressor 22 and the expansion valve 24 are provided in the outdoor unit 12 together with the outdoor heat exchanger 23.

  The refrigerant branch path 21q branches from the path of the refrigerant circulation path 21p between the compressor 22 and the outdoor heat exchanger 23, and the refrigerant branch path 21p between the outdoor heat exchanger 23 and the expansion valve 24 is branched. It is provided to join on the route.

  The refrigeration circuit 21 is further provided with a water heat exchanger 32, a flow path switching valve 28 and a check valve 29. The water heat exchanger 32 and the check valve 29 are provided on the refrigerant branch path 21q. The check valve 29 includes a hydrothermal exchanger 32 and a position where the refrigerant branch path 21q merges with the refrigerant circulation path 21p (hereinafter also referred to as a merge position of the refrigerant branch path 21q) on the refrigerant branch path 21q. It is provided in between. The flow path switching valve 28 is provided at a position where the refrigerant branch path 21q branches from the refrigerant circulation path 21p (hereinafter also referred to as a branch position of the refrigerant branch path 21q). The water heat exchanger 32 is provided between the flow path switching valve 28 and the check valve 29 on the refrigerant branch path 21q.

  The water heat exchanger 32 performs heat exchange between the refrigerant flowing through the refrigeration circuit 21 and the water flowing through the hot water supply circuit 31. The flow path switching valve 28 operates so that part or all of the refrigerant circulating in the refrigerant circulation path 21p is guided to the water heat exchanger 32 during the hot water supply operation. The check valve 29 allows the refrigerant flow from the branch position of the refrigerant branch path 21q to the merge position of the refrigerant branch path 21q on the path of the refrigerant branch path 21q, and from the merge position of the refrigerant branch path 21q to the refrigerant branch path 21q. The refrigerant flow toward the branch position is limited.

  The water heat exchanger 32, the flow path switching valve 28 and the check valve 29 are provided in the outdoor unit 12.

  During the cooling operation of the air conditioner 10, a hot water supply operation can be performed. The refrigerant flow during the hot water supply operation will be described. First, the refrigerant is adiabatically compressed by the compressor 22. As the refrigerant is compressed, the pressure and temperature of the refrigerant rise to become high-temperature and high-pressure superheated steam and the refrigerant is discharged from the compressor 22. Part or all of the refrigerant that has flowed out of the compressor 22 flows into the water heat exchanger 32 through the refrigerant branch passage 21q. The refrigerant dissipates heat to the water flowing through the hot water supply circuit 31 in the water heat exchanger 32 and is condensed (liquefied) by being cooled. The refrigerant that has flowed out of the water heat exchanger 32 joins the refrigerant branch passage 21q to the refrigerant circulation passage 21p, and then travels toward the expansion valve 24.

  In the expansion valve 24, the refrigerant in the supercooled liquid state is squeezed and expanded, and the temperature and the pressure are reduced to become the low temperature and low pressure gas-liquid mixed steam. The refrigerant that has flowed out of the expansion valve 24 goes to the indoor heat exchanger 25. The gas-liquid mixed refrigerant sent from the expansion valve 24 evaporates by absorbing heat from the air in the indoor space in the indoor heat exchanger 25. Thereafter, the gas-phase refrigerant is adiabatically compressed again in the compressor 22.

  In accordance with such a cycle, the refrigerant continuously repeats the compression, condensation, throttle expansion, and evaporation state changes.

  On the path of the hot water supply circuit 31, a pre-heater 50 as a heating unit, the above-described water heat exchanger 32, and a temperature regulator 33 are provided. One end of the hot water supply circuit 31 (upstream end of the water flow in the hot water supply circuit 31) is provided with a water connection port 35 for connecting the hot water supply circuit 31 to a water supply source, and the other end of the hot water supply circuit 31 (hot water supply circuit 31). The downstream end of the water flow is connected to a hot water supply terminal 34 such as a shower.

  The preheater 50 heats the water flowing through the hot water supply circuit 31 by receiving heat from sunlight. The preheater 50 is provided between the water connection port 35 and the water heat exchanger 32 on the path of the hot water supply circuit 31. The preheater 50 is provided on the upstream side of the water flow in the hot water supply circuit 31 with respect to the water heat exchanger 32.

  The temperature adjuster 33 adjusts the temperature of hot water sent to the hot water supply terminal 34. More specifically, the temperature adjuster 33 mixes low-temperature water supplied to the hot water supply circuit 31 through the water connection port 35 with hot water whose temperature has been increased by heating by the pre-heater 50 and the water heat exchanger 32. Thus, the temperature of the hot water sent to the hot water supply terminal 34 is adjusted.

  In the present embodiment, water is supplied to the hot water supply circuit 31 through the water connection port 35. The water supplied to the hot water supply circuit 31 is first heated by receiving heat from sunlight while flowing through the pre-heater 50. Next, the water flowing out from the pre-heater 50 is further heated by exchanging heat with the refrigerant flowing through the refrigeration circuit 21 in the water heat exchanger 32. The hot water that has undergone two-stage heating is temperature-adjusted by the temperature adjuster 33 and then sent to the hot water supply terminal 34.

  When the heating capacity in the pre-heater 50 is not sufficiently obtained such as in the rain, the boiling temperature can be raised by increasing the heating capacity on the heat pump cycle side.

  Next, the structure of the preheater 50 will be described in detail. FIG. 2 is a perspective view showing the appearance of the outdoor unit in FIG. FIG. 3 is an exploded view of the outdoor unit in FIG.

  With reference to FIGS. 1 to 3, air conditioner 10 in the present embodiment has an outdoor unit housing 41. The outdoor unit housing 41 has a housing shape and makes the appearance of the outdoor unit 12. The outdoor unit housing 41 is made of sheet metal, for example. The outdoor unit housing 41 accommodates various components constituting the outdoor unit 12 shown in FIG. 1 including the outdoor heat exchanger 23 and the water heat exchanger 32.

  The outdoor unit housing 41 has a substantially rectangular parallelepiped shape. The outdoor unit housing 41 has a top surface 42, a front surface 43, and a back surface 45. The outdoor unit 12 is installed such that the top surface 42 of the outdoor unit housing 41 faces vertically upward and the back surface 45 faces the wall surface of the building.

  The front surface 43 is disposed on the back side of the back surface 45. The front surface 43 is provided with a vent hole 44 for introducing outdoor air into the outdoor unit housing 41. The ventilation openings 44 are provided in a lattice shape, and communicate the inside and outside of the outdoor unit housing 41. The ventilation port 44 is provided in a part of the front surface 43, and in this embodiment, is provided in a range on one side of the front surface 43 in the horizontal direction.

  The pre-heater 50 includes a flow channel forming plate 51 and a fixing member (not shown) such as a bolt that fixes the flow channel forming plate 51 to the outdoor unit housing 41.

  4 to 6 are views showing the internal structure of the passage forming plate in FIGS. 2 and 3. With reference to FIGS. 1 to 6, the water flow path forming plate 51 is formed of a plate material having an internal space. The flow channel forming plate 51 has a water supply port 55 and a drain port 54. A pipe continuing from the water connection port 35 in FIG. 1 is connected to the water supply port 55, and a pipe extending from the water heat exchanger 32 in the outdoor unit housing 41 is connected to the drain port 54.

  The flow channel forming plate 51 forms a flow channel 56 through which water as a fluid to be heated flows. The flowing water channel 56 extends between the water supply port 55 and the drain port 54. The flowing water channel 56 extends in a zigzag shape between the water supply port 55 and the drain port 54. The water channel 56 extends along the horizontal direction between the water supply port 55 and the drain port 54 while reversing the traveling direction for each predetermined length.

  The water flow path forming plate 51 is provided on the outer surface of the outdoor unit housing 41. The water flow path forming plate 51 is provided so as to be in surface contact with the outer surface of the outdoor unit housing 41. The water flow path forming plate 51 is provided in close contact with the outdoor unit housing 41. In the present embodiment, the water flow path forming plate 51 is provided so as to cover the top surface 42 of the outdoor unit housing 41 and to cover the front surface 43 while avoiding the vent hole 44.

  The water flow path forming plate 51 includes an upper part 52 that covers the top surface 42 and a side part 53 that covers the front surface 43 as its constituent parts. The flow channel forming plate 51 has a shape that is bent at the boundary position between the upper portion 52 and the side portion 53 so as to correspond to the shape of the outdoor unit housing 41. In the present embodiment, the water supply port 55 is provided in the side portion 53, and the drain port 54 is provided in the upper portion 52. The flowing water channel 56 formed in the upper part 52 and the flowing water channel 56 formed in the side part 53 are connected to each other.

  The flow channel forming plate 51 is made of glass. The water flow path forming plate 51 may be formed of resin or metal. Preferably, a material having excellent thermal conductivity is selected as the resin or metal forming the water flow path forming plate 51. The surface of the water flow path forming plate 51 may be painted in an endothermic color such as black. Further, the flow channel forming plate 51 is not limited to the square shape shown in the figure, and may be a cylindrical shape or a polygonal shape.

  The water flow path forming plate 51 provided on the outer surface of the outdoor unit housing 41 rises in temperature by receiving sunlight or transferring heat from the outdoor unit housing 41. The water supplied to the preheating machine 50 is preliminarily heated by flowing through the water flow channel 56 formed in such a water flow channel forming plate 51.

  The form in which the flow channel forming plate 51 is provided is not limited to that shown in FIG. 2, but covers at least the top surface 42 of the outdoor unit housing 41 from the viewpoint of receiving sunlight more efficiently. It is preferable to be provided. The form in which the water flow path forming plate 51 is provided may be a form that further covers the side surface of the outdoor unit housing 41 as long as it avoids the wiring port and the piping port provided in the outdoor unit housing 41.

  Moreover, the path of the water flow path 56 formed in the water flow path forming plate 51 is not limited to that shown in FIGS. 4 to 6, and can be appropriately changed according to the shape of the water flow path forming plate 51. The flowing water channel 56 is preferably a route that repeatedly reciprocates on the outer surface of the outdoor unit housing 41.

  In the present embodiment, a flow channel forming plate 51 for heating water by receiving sunlight is provided on the outer surface of the outdoor unit housing 41. With such a configuration, the air conditioner 10 with a hot water supply function having a sufficient heating capability by a heat pump cycle and sunlight can be realized easily and at low cost without causing an increase in the size of the outdoor unit 12. it can.

  Further, in the present embodiment, the hot water supply circuit 31 is not provided with a hot water supply tank, and hot water is supplied by a direct hot water system, so that the hot water supply system itself can be downsized and initial equipment costs can be reduced. In addition, since the direct hot water supply system supplies hot water only when necessary, the efficiency of the hot water supply system can be improved. Moreover, since the hot water by sunlight is stored in the flowing water channel formation board 51, when hot water is needed temporarily, this can also be utilized. Although the amount of hot water that can be supplied is limited, hot water supply using only the flow channel forming plate 51 is possible.

  Further, in the present embodiment, the water flow path forming plate 51 is detachably provided to the outdoor unit housing 41. For this reason, according to the heating capability requested | required at the time of hot_water | molten_metal supply, the preheater 50 can be easily added or removed with respect to the outdoor unit 12. FIG.

  In addition, the flow channel forming plate 51 can be retrofitted to the outdoor unit casing 41 of the air conditioner that originally has only a cooling function, and a solar heating system can be easily added. In this case, hot water obtained by receiving heat from sunlight in the flow path forming plate 51 is sent to the hot water supply terminal 34 without being heated by the heat exchanger inside the outdoor unit 12. In such a configuration, in order to increase the temperature of the hot water supplied to the hot water supply terminal 34, the water flow path forming plates 51 that can transmit sunlight may be provided in multiple stages (for example, two stages).

  The air conditioner 10 according to Embodiment 1 of the present invention described above is an air conditioner having a function of heating water as a fluid to be heated. The air conditioner 10 performs heat exchange between the refrigerant guided from the refrigeration circuit 21 constituting the heat pump cycle and water, thereby performing a water heat exchanger 32 as a heat exchanger for heating water, An outdoor unit housing 41 that accommodates the exchanger 32 and is provided outside, and a water channel 56 that is provided on the outer surface of the outdoor unit housing 41 as a passage through which water flows, and receives heat from sunlight. And a flow channel forming plate 51 as a passage forming member for heating water.

  Moreover, the pre-heating machine 50 as a heating unit in Embodiment 1 of this invention performs heat exchange between the refrigerant led from the refrigeration circuit 21 constituting the heat pump cycle and water as the heated fluid. An air conditioner having a function of heating water, including a water heat exchanger 32 as a heat exchanger for heating water and an outdoor unit housing 41 that houses the water heat exchanger 32 and is installed outdoors. 10 is a heating unit that can be assembled into the unit 10. The pre-heater 50 includes a water flow path forming plate 51 as a passage forming member that is provided on the outer surface of the outdoor unit housing 41 and forms a water flow path 56 as a water flow path.

  According to the air conditioner 10 and the preheater 50 according to Embodiment 1 of the present invention configured as described above, the water flow path forming plate 51 for heating water by receiving heat from sunlight is provided in the outdoor unit housing. Since it is provided on the outer surface of 41, the air conditioner 10 with a hot water supply function can be realized in a small size and at low cost.

(Embodiment 2)
FIG. 7 is a perspective view showing the structure inside the outdoor unit of the air conditioner according to Embodiment 2 of the present invention. FIG. 8 is a perspective view showing a refrigerant pipe and a water pipe provided in the outdoor unit in FIG.

  The air conditioner in the present embodiment basically has the same structure as that of the air conditioner 10 in the first embodiment. Hereinafter, the description of the overlapping structure will not be repeated.

  7 and 8, in the air conditioner in the present embodiment, the water heat exchanger 32 in FIG. 1 is not provided, and the refrigeration circuit 21 is configured using the outdoor heat exchanger 23. Heat exchange is performed between the flowing refrigerant and the water flowing through the hot water supply circuit 31.

  The outdoor heat exchanger 23 has a refrigerant pipe 61 through which the refrigerant flows. The refrigerant pipe 61 is routed so as to circulate spirally inside the outdoor unit housing 41. A refrigerant inlet 62 through which refrigerant is supplied toward the outdoor heat exchanger 23 is provided at one end of the refrigerant pipe 61, and the refrigerant is discharged from the outdoor heat exchanger 23 at the other end of the refrigerant pipe 61. A refrigerant outlet 63 is provided.

  The air conditioner in the present embodiment further has a water pipe 71 as a fluid circulation pipe. The water pipe 71 constitutes the hot water supply circuit 31 in the outdoor unit 12. One end of the water pipe 71 is provided with a water inlet 72 through which water is supplied toward the outdoor unit 12 and a water outlet 73 through which water is discharged from the outdoor unit 12. The water inlet 72 is connected to a pipe extending from the pre-heating machine 50 in FIG. 1, and the water outlet 73 is connected to a pipe extending from the temperature regulator 33 in FIG.

  FIG. 9 is a cross-sectional view showing the refrigerant pipe and the water pipe along the line IX-IX in FIG. The water pipe 71 is routed inside the outdoor unit housing 41 so that heat can be exchanged between the water flowing through the water pipe 71 and the refrigerant flowing through the outdoor heat exchanger 23. More specifically, the water pipe 71 is routed so as to circulate spirally inside the outdoor unit housing 41 while being in contact with the refrigerant pipe 61. The water pipe 71 and the refrigerant pipe 61 are stacked. The water pipe 71 and the refrigerant pipe 61 are provided so as to be alternately stacked.

  According to such a configuration, water can be heated using the outdoor heat exchanger 23 provided on the path of the refrigeration circuit 21.

  According to the air conditioner in Embodiment 2 of the present invention configured as described above, the effects described in Embodiment 1 can be similarly achieved.

(Embodiment 3)
FIG. 10 is a diagram showing a circuit configuration of an air conditioner according to Embodiment 3 of the present invention. The air conditioner in the present embodiment basically has the same structure as that of the air conditioner 10 in the first embodiment. Hereinafter, the description of the overlapping structure will not be repeated.

  Referring to FIG. 10, in the present embodiment, hot water supply circuit 31 is further provided with a bypass circuit 81 and a flow path switching valve 82.

  The bypass circuit 81 branches off from the path of the hot water supply circuit 31 between the water connection port 35 and the preheater 50, and joins on the path of the hot water supply circuit 31 between the preheater 50 and the water heat exchanger 32. It is provided to do. The flow path switching valve 82 is provided at a position where the bypass circuit 81 joins the hot water supply circuit 31. By operating the flow path switching valve 82, the normal mode in which the water supplied from the water connection port 35 is directed to the water heat exchanger 32 through the pre-heater 50, and the water supplied from the water connection port 35 is changed. A low-temperature mode is selected that goes to the water heat exchanger 32 through the bypass circuit 81 without passing through the pre-heater 50.

  The air conditioner in the present embodiment has a solar radiation sensor 97 and a temperature sensor 94. The solar radiation sensor 97 measures the amount of solar radiation applied to the preheating machine 50. The temperature sensor 94 is provided on the path of the hot water supply circuit 31 and measures the temperature of the water supplied to the hot water supply circuit 31 through the water connection port 35.

  When the outside air temperature is lower than the temperature of the water supplied from the water connection port 35 (city water temperature) and the amount of solar radiation is small (rainfall, snow cover, cloudy, evening to night to morning, etc.), the normal mode If the water is caused to flow through the pre-heater 50, the city water temperature will be further lowered. For this reason, in this embodiment, in such a case, the opening / closing control of the flow path switching valve 82 is performed based on the measured values of the solar radiation sensor 97 and the temperature sensor 94, and the low temperature mode is selected. Thereby, since the water supplied from the water connection port 35 goes directly to the water heat exchanger 32, hot water supply at a low temperature can be performed efficiently.

  In FIG. 10, in addition to the solar radiation sensor 97 and the temperature sensor 94, various temperature sensors and flow path control valves used on the refrigeration circuit 21 and the hot water supply circuit 31 are shown as an example.

  Specifically, a temperature sensor 87 for measuring the refrigerant temperature in the indoor heat exchanger 25 and a temperature sensor 86 for measuring the room temperature are provided on the indoor unit side of the refrigeration circuit 21. On the outdoor unit side of the refrigeration circuit 21, a temperature sensor 89 and a temperature sensor 90 for measuring the refrigerant temperature on the IN side and OUT side of the compressor 22, respectively, and a refrigerant temperature on the IN side and OUT side of the expansion valve 24, respectively. Temperature sensor 83 and temperature sensor 84 for measuring the temperature, temperature sensor 91 for measuring the outside air temperature, temperature sensor 92 for measuring the refrigerant temperature in the outdoor heat exchanger 23, and a water heat exchanger A temperature sensor 93 for measuring the refrigerant temperature in 32 is provided. In the refrigeration circuit 21, the two-way valve 85 disposed on the path between the expansion valve 24 and the indoor heat exchanger 25 and the path between the indoor heat exchanger 25 and the compressor 22 are disposed. A two-way valve 88 is further provided.

  The hot water supply circuit 31 includes a temperature sensor 96 for measuring the boiling temperature of water on the OUT side of the water heat exchanger 32, and a temperature sensor 95 for measuring the temperature of hot water sent to the hot water supply terminal 34. Is provided.

  According to the air conditioner in Embodiment 3 of the present invention configured as described above, the effects described in Embodiment 1 can be similarly obtained.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is mainly applied to an air conditioner with a hot water supply function.

  DESCRIPTION OF SYMBOLS 10 Air conditioner, 12 Outdoor unit, 14 Indoor unit, 21 Refrigeration circuit, 21p Refrigerant circuit, 21q Refrigerant branch, 22 Compressor, 23 Outdoor heat exchanger, 24 Expansion valve, 25 Indoor heat exchanger, 26 , 27 Fan, 28, 82 Channel switching valve, 29 Check valve, 31 Hot water supply circuit, 32 Water heat exchanger, 33 Temperature regulator, 34 Hot water terminal, 35 Water connection port, 41 Outdoor unit housing, 42 Top surface , 43 Front, 44 Vent, 45 Back, 50 Pre-heater, 51 Flow channel forming plate, 52 Upper part, 53 Side, 54 Drain port, 55 Water supply port, 56 Flow channel, 61 Refrigerant pipe, 62 Refrigerant inlet, 63 Refrigerant outlet, 71 water piping, 72 water inlet, 73 water outlet, 81 bypass circuit, 83, 84, 86, 87, 89, 90, 91, 92, 93, 94, 95, 96 Temperature sensor, 85, 88 Two-way valve, 97 solar radiation sensor.

Claims (5)

An air conditioner having a function of heating a fluid to be heated,
A heat exchanger for heating the heated fluid by exchanging heat between the refrigerant guided from the refrigeration circuit constituting the heat pump cycle and the heated fluid;
An outdoor unit housing that houses the heat exchanger and is installed outdoors;
An air conditioner provided on an outer surface of the outdoor unit housing, forming a passage through which a fluid to be heated flows, and a passage forming member that heats the fluid to be heated by receiving heat from sunlight.   The air conditioner according to claim 1, wherein the passage forming member is provided so as to be in surface contact with an outer surface of the outdoor unit housing. The outdoor unit housing has a top surface and a front surface on which a ventilation opening for introducing outdoor air is formed,
The air conditioner according to claim 1 or 2, wherein the passage forming member is provided so as to cover the top surface and to cover the front surface while avoiding the ventilation port. The heat exchanger is an outdoor heat exchanger that is provided on the path of the refrigeration cycle and performs heat exchange between the refrigerant and the outdoor air,
A fluid distribution pipe connected to the passage forming member and through which the fluid to be heated flows;
The air conditioning according to any one of claims 1 to 3, wherein the fluid circulation pipe is routed so that heat can be exchanged between the fluid to be heated and the refrigerant flowing through the outdoor heat exchanger. Machine. A heat exchanger that heats the fluid to be heated by exchanging heat between the refrigerant guided from the refrigeration circuit constituting the heat pump cycle and the fluid to be heated, and the heat exchanger is accommodated and installed outdoors. A heating unit that can be assembled to an air conditioner having a function of heating a fluid to be heated,
A heating unit comprising a passage forming member that is provided on the outer surface of the outdoor unit housing and forms a passage through which a fluid to be heated flows.

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