Air conditioning indoor unit

Abstract

Reduces the impact of changes in outside air conditions on the electrostatic atomization unit. [Solution] The air conditioning indoor unit (2) includes a casing (23) and an electrostatic atomization unit (75). The casing (23) has an air intake flow path (R1) through which outside air flows. The electrostatic atomization unit (75) is a unit that emits liquid particles containing ions by electrical discharge. The electrostatic atomization unit (75) is located outside the air intake flow path (R1).

Description

[Technical field]

[0001] The present invention relates to an air conditioning indoor unit that conditions the air in a room. [Background technology]

[0002] Conventionally, air conditioner indoor units equipped with electrostatic atomization units have been known. For example, as described in Patent Document 1 (JP Patent Publication 2014-20578 A), the electrostatic atomization unit of the air conditioner indoor unit generates liquid particles containing ions by discharging. The electrostatic atomization unit releases the liquid particles containing ions into the room through the air outlet of the air conditioner indoor unit. Summary of the Invention [Problem to be solved by the invention]

[0003] The air conditioner indoor unit described in Patent Document 1 does not have a function for taking in outside air. When installing an electrostatic atomization unit in an air conditioner indoor unit that has a function for taking in outside air, it is necessary to take measures to prevent the electrostatic atomization unit from malfunctioning due to the outside air. [Means for solving the problem]

[0004] An air conditioning indoor unit according to a first aspect is an air conditioning indoor unit that conditions the air inside a room, and includes a casing and an electrostatic atomization unit. The casing has an air intake flow path through which outside air flows. The electrostatic atomization unit is a unit that releases liquid particles containing ions by discharging electricity. The electrostatic atomization unit is disposed outside the air intake flow path.

[0005] In the air conditioning indoor unit of the first aspect, the electrostatic atomization unit is disposed outside the air supply flow path through which outside air flows, thereby making it possible to suppress the impact that changes in the state of the outside air, particularly high humidity outside air, have on the electrostatic atomization unit.

[0006] An air conditioning indoor unit according to a second aspect is the air conditioning indoor unit according to the first aspect, in which the air intake passage is disposed at one end side in the longitudinal direction of the casing, and the electrostatic atomization unit is disposed within the casing and at the other end side in the longitudinal direction.

[0007] In the air conditioning indoor unit of the second aspect, with a simple configuration in which the air supply flow path is disposed at one end in the longitudinal direction and the electrostatic atomization unit at the other end, the effect that changes in the state of the outside air have on the electrostatic atomization unit can be suppressed.

[0008] An air conditioning indoor unit according to a third aspect is the air conditioning indoor unit according to the second aspect, and includes an electrical component box disposed within the casing and extending in the longitudinal direction. The electrical component box has a first electrical component chamber at one end thereof housing a first electrical circuit component driven by a voltage less than 50 volts, and a second electrical component chamber at the other end thereof housing a second electrical circuit component driven by a voltage of 50 volts or more.

[0009] In the air conditioning indoor unit of the third aspect, by locating the second electrical equipment chamber of the electrical equipment box at one end in the longitudinal direction where the electrostatic atomization unit is arranged, the wiring distance from the second electrical equipment chamber to the electrostatic atomization unit can be shortened, making it easier to take measures against voltages of 50 volts or more.

[0010] An air conditioning indoor unit according to a fourth aspect is the air conditioning indoor unit according to any one of the first to third aspects, further comprising a fan disposed within a casing. The casing has an intake port for drawing in indoor air from inside the room, an outlet port for blowing air into the room, and an air passage connecting the intake port and the outlet port. The fan generates an airflow that flows from the intake port through the air passage toward the outlet port. The electrostatic atomization unit takes in air for discharging liquid particles from a space other than the air passage.

[0011] In the air conditioning indoor unit of the fourth aspect, the air for the electrostatic atomization unit to emit liquid particles is taken in from a space other than the ventilation passage, so the impact of changes in the state of the outside air on the electrostatic atomization unit can be reduced.

[0012] An air conditioning indoor unit according to a fifth aspect is the air conditioning indoor unit according to the fourth aspect, and includes a heat exchanger that is disposed in an air passage in a casing and performs heat exchange between the indoor air and the outdoor air and the heat medium. The air supply passage includes an air supply member having an outlet opening for blowing out the outdoor air, and is disposed so that the outlet opening faces the heat exchanger.

[0013] In the air conditioning indoor unit of the fifth aspect, the outlet opening of the air supply member faces the heat exchanger, so it is possible to prevent problems such as condensation caused by outside air hitting other parts inside the casing.

[0014] An air conditioning indoor unit according to a sixth aspect is the air conditioning indoor unit according to any one of the first to fifth aspects, further comprising a control device that controls the electrostatic atomization unit. When outside air is being introduced into the room, the control device controls the electrostatic atomization unit not to discharge.

[0015] In the air conditioning indoor unit of the sixth aspect, by not discharging in the electrostatic atomization unit when outside air is being introduced into the room, it is possible to prevent the electrostatic atomization unit from being affected by the outside air when the outside air is being introduced.

[0016] An air conditioning indoor unit according to a seventh aspect is the air conditioning indoor unit according to any one of the first aspect to the sixth aspect, wherein the air supply flow path is a flow path that supplies humidified outside air.

[0017] In the air conditioning indoor unit of the seventh aspect, even when humidified outside air flows through the air intake flow path, the electrostatic atomization unit is positioned away from the air intake flow path through which the outside air flows, thereby reducing the effect of the humidity of the outside air on the electrostatic atomization unit. [Brief description of the drawings]

[0018] [Figure 1] 1 is a conceptual diagram showing an air conditioner including an air conditioning indoor unit according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view of the air conditioning indoor unit according to the embodiment. [Diagram 3] FIG. 2 is an exploded perspective view of the air conditioning indoor unit according to the embodiment. [Figure 4] 2 is a diagram for explaining a refrigerant circuit and an air flow path of the air conditioning system of FIG. 1. FIG. [Diagram 5] 1A is a partially cutaway plan view of an air conditioning indoor unit according to an embodiment, and FIG. 1B is a partially cutaway front view of an air conditioning indoor unit according to an embodiment. [Figure 6] FIG. 2 is a schematic cross-sectional view of an air conditioning indoor unit for illustrating the arrangement position of an electrostatic atomization unit according to the embodiment. [Figure 7] FIG. 2 is a front view showing the appearance of the humidification duct. [Figure 8] FIG. 2 is a side view showing the appearance of the humidification duct. [Figure 9] FIG. 4 is a rear view showing the appearance of the humidification duct. [Figure 10] 8 is a cross-sectional view of the humidifying duct taken along line II in FIG. 7. [Figure 11] FIG. 1 is a schematic diagram showing an outline of a configuration of an electrostatic atomizer. [Figure 12] FIG. 2 is a schematic cross-sectional view showing an outline of the configuration of the electrostatic atomization unit. [Figure 13] 1A is a partially cutaway plan view of an air conditioning indoor unit according to a modified example, and FIG. 1B is a partially cutaway front view of an air conditioning indoor unit according to a modified example. [Figure 14] FIG. 13 is a schematic cross-sectional view of an air conditioning indoor unit for explaining the arrangement position of an electrostatic atomization unit according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] (1) Overview of air conditioning system configuration (1-1) Overview of the overall configuration of the air conditioning system As shown in FIG. 1, an air conditioning indoor unit 2 according to the embodiment is applied to an air conditioning system 1. The air conditioning system 1 includes an air conditioning indoor unit 2, an air conditioning outdoor unit 4, and a humidifier 6. In the following description, the directions of the arrows may be described using the expressions "upper", "lower", "front", and "rear" shown in FIG. 1, FIG. 2, and FIG. 6. Also, in FIG. 4 and FIG. 6, the flow of air is indicated by thick arrows. The operation modes of this air conditioning system 1 include, for example, cooling operation, heating operation, dehumidification operation, humidification operation, fan operation, ventilation operation, and air purification operation. As shown in FIG. 4, the air conditioning system 1 includes a control unit 8 that controls the air conditioning indoor unit 2 and the humidifier 6.

[0020] The air conditioning indoor unit 2 is installed in a room RM (see FIG. 1) and performs air conditioning in the room RM (indoors). As shown in FIG. 1 and FIG. 4, the air conditioning indoor unit 2 is included in an air conditioner 10 of an air conditioning system 1. The air conditioner 10 includes an air conditioning indoor unit 2 and an air conditioning outdoor unit 4. The air conditioning indoor unit 2 and the air conditioning outdoor unit 4 are connected by refrigerant connection pipes 11 and 12. The air conditioning indoor unit 2, the air conditioning outdoor unit 4, and the refrigerant connection pipes 11 and 12 form a refrigerant circuit 13. The air conditioning system 1 can perform, for example, cooling operation, heating operation, dehumidification operation, ventilation operation, and air cleaning operation by using the air conditioning indoor unit 2 and the air conditioning outdoor unit 4 (air conditioner 10) without using a humidifier 6. In the refrigerant circuit 13, for example, a vapor compression refrigeration cycle is repeated during cooling operation, heating operation, and dehumidification operation. The air conditioning indoor unit 2 and the air conditioning outdoor unit 4 are controlled by a control unit 8.

[0021] In this embodiment, a case will be described where the air conditioning indoor unit 2 is attached to and installed on the wall WL of a room RM. However, the type of the air conditioning indoor unit 2 is not limited to the type that is installed on the wall WL of a room RM. The air conditioning indoor unit 2 may be, for example, one that is installed on the ceiling CI or the floor FL.

[0022] As shown in FIG. 2, the air conditioning indoor unit 2 has a heat exchanger 21. The air conditioning indoor unit 2 exchanges heat with the air by passing the air through the heat exchanger 21. The heat exchanger 21 has a plurality of heat transfer fins 21a and a plurality of heat transfer tubes 21b. In the heat exchanger 21, air passes between the plurality of heat transfer fins 21a. During heat exchange, the air passes between the plurality of heat transfer fins 21a and at the same time, a refrigerant flows through the heat transfer tube 21b. The refrigerant flowing through the heat transfer tube 21b is a type of heat medium. The heat transfer tube 21b is thermally connected to the plurality of heat transfer fins 21a so as to be folded back multiple times and to penetrate each heat transfer fin 21a multiple times.

[0023] The air conditioning system 1 can perform, for example, a humidification operation and a ventilation operation by using the humidifier 6 shown in FIG. 1 and FIG. 4 together with the air conditioning indoor unit 2 and the air conditioning outdoor unit 4. In other words, the air conditioning indoor unit 2 of the air conditioning system 1 configured in this way can perform, for example, operations corresponding to a cooling operation, a heating operation, a dehumidification operation, a humidification operation, an air blowing operation, a ventilation operation, and an air cleaning operation. The humidifier 6 has an air supply and exhaust hose 68 that communicates with the room via the air conditioning indoor unit 2. The air conditioning indoor unit 2 can perform humidification to increase the humidity in the room with moisture supplied by the humidifier 6 to the room RM (indoors) through the air supply and exhaust hose 68. In addition, the air conditioning indoor unit 2 can perform ventilation of the room RM with outdoor air supplied by the humidifier 6 to the room RM (indoors) through the air supply and exhaust hose 68. The outdoor air described in this disclosure is outdoor OD air.

[0024] The control unit 8 of the air conditioning system 1 includes a control device 81 that controls the air conditioning indoor unit 2, and an outdoor control panel 82 that controls the air conditioning outdoor unit 4 and the humidifier 6. The control device 81 and the outdoor control panel 82 are controllers realized by, for example, a microcomputer. For example, the control device 81 includes a timer 81a, a control arithmetic device 81b, and a storage device 81c. A processor such as a CPU or a GPU can be used for the control arithmetic device 81b. The control arithmetic device 81b reads a program stored in the storage device 81c, and performs, for example, a predetermined sequence process and arithmetic process according to the program. Furthermore, the control arithmetic device 81b can write the calculation result to the storage device 81c and read information stored in the storage device 81c according to the program.

[0025] (1-2) Placement of electrostatic atomizer units in indoor air conditioners The air conditioning indoor unit 2 is equipped with an electrostatic atomization unit 75 shown in FIG. 4. The electrostatic atomization unit 75 is a device that releases liquid particles containing ions by discharging. The electrostatic atomization unit 75 is arranged outside the intake air flow path R1 shown in FIG. 4. The fact that the electrostatic atomization unit 75 is arranged outside the intake air flow path R1 means, in other words, that the air flowing through the intake air flow path R1 does not flow through the electrostatic atomization unit 75. The intake air flow path R1 is a flow path that allows outside air to flow. The other flow path R2, which is a flow path other than the intake air flow path R1, is a flow path through which outside air does not flow. The electrostatic atomization unit 75 is arranged in a location other than the intake air flow path R1 and the other flow path R2 that constitute the ventilation path FP. In other words, air does not flow directly into the electrostatic atomization unit 75 from the ventilation path FP.

[0026] The air conditioning indoor unit 2 includes a casing 23. As shown in FIG. 3, the casing 23 of the air conditioning indoor unit 2 described here has a frame 23f, a grill 23g, and a front panel 23p. The configuration of the casing 23 of the air conditioning indoor unit 2 is not limited to the configuration described here. For example, the front panel 23p and the grill 23g may be integrated. This casing 23 extends long along the longitudinal direction D1. One end E1 of the casing 23 in the longitudinal direction D1 is on the left when looking at the casing 23 from the front, and the other end E2 of the casing 23 in the longitudinal direction D1 is on the right when looking at the casing 23 from the front. In the present disclosure, the side closer to the one end E1 than the center CE of the longitudinal direction D1 of the casing 23 is called the one end side, and the side closer to the other end E2 than the center CE is called the other end side. In other words, the area between the center CE and one end E1 of the casing 23 is the one end side, and the area between the center CE and the other end E2 is the other end side. Outside air is supplied to the one end side by the supply / exhaust hose 68. As a result, the one end side in the longitudinal direction D1 of the casing 23 becomes the air supply flow path R1. In Fig. 4, the flow of outside air is indicated by a thick arrow of a dashed line. Since outside air is not supplied to the other end side in the longitudinal direction D1 of the casing 23 from the supply / exhaust hose 68, this other end side becomes a flow path R2 other than the air supply flow path.

[0027] (2) Detailed configuration (2-1) Air conditioning indoor unit 2, 4, and 6, the air conditioning indoor unit 2 includes a heat exchanger 21, a fan 22, a casing 23, an air filter 24, a drain pan 26, a horizontal flap 27, a vertical flap (not shown), a humidifying duct 28, and an electrostatic atomization device 70 (see FIG. 11) including an electrostatic atomization unit 75. The air conditioning indoor unit 2 also includes an indoor temperature sensor 31 and an indoor humidity sensor 32. The indoor temperature sensor 31 and the indoor humidity sensor 32 are connected to a control device 81.

[0028] The casing 23 has an intake port 23a at an upper portion and an exhaust port 23b at a lower portion. The air conditioning indoor unit 2 drives the fan 22 to draw in indoor air from the intake port 23a and to blow out the air that has passed through the heat exchanger 21 from the exhaust port 23b. In the casing 23, an air flow path connecting the intake port 23a and the exhaust port 23b is an air passage FP. The fan 22 is disposed in a substantially central portion of the casing 23 in a cross-sectional view of the air conditioning indoor unit 2 (see FIG. 2). A cross-flow fan is used for the fan 22. The fan 22 has blades extending along the longitudinal direction D1 and generates an air flow in a direction perpendicular to the longitudinal direction D1.

[0029] In the ventilation passage FP from the intake port 23a to the exhaust port 23b, the heat exchanger 21 is disposed upstream of the fan 22. When viewed in the direction in which the heat transfer tube 21b extends (in a side view), the heat exchanger 21 has a shape that opens downward so as to cover the upper part of the fan 22. Here, such a shape is called a Λ shape or a C shape. The heat exchanger 21 has a first heat exchange section 21F that is far from the wall WL and a second heat exchange section 21R that is close to the wall WL. A drain pan 26 is disposed below the lower part of the first heat exchange section 21F and the lower part of the second heat exchange section 21R of the Λ shape or C shape heat exchanger 21. Condensation generated in the first heat exchange section 21F of the heat exchanger 21 is received by the drain pan 26 disposed in the front lower part of the heat exchanger 21. Condensation occurring in the second heat exchange section 21R of the heat exchanger 21 is received by a drain pan 26 disposed at the rear lower part of the heat exchanger 21.

[0030] A horizontal flap 27 and a vertical flap are arranged at the air outlet 23b. The horizontal flap 27 changes the wind direction of the air blown out from the air outlet 23b up and down. Therefore, the horizontal flap 27 is configured to be able to change the angle it forms with the horizontal direction by a motor 27m. The vertical flap is configured to be able to change the wind direction of the air blown out from the air outlet 23b left and right. The air conditioning indoor unit 2 drives the vertical flap by a motor (not shown), for example, to change the angle it forms with the front-rear direction.

[0031] An air filter 24 is disposed downstream of the suction port 23a in the casing 23 and upstream of the heat exchanger 21. Substantially all of the indoor air supplied to the heat exchanger 21 passes through the air filter 24. Therefore, dust larger than the mesh of the air filter 24 is removed by the air filter 24 and does not reach the heat exchanger 21.

[0032] The air conditioning indoor unit 2 is provided with a humidification duct 28 as an air supply member in the casing 23. As shown in FIG. 5, the humidification duct 28 is disposed at one end side of the casing 23 in the longitudinal direction D1, and is included in the air supply flow path R1 formed at one end side of the casing 23. In the humidification duct 28, the blow-out opening 28a is disposed to face the heat exchanger 21 (see FIG. 6). When the air conditioning indoor unit 2 is performing ventilation operation, outside air is blown out from the humidification duct 28. During ventilation operation, the humidification operation in the humidifier 6 is stopped, and outside air is sent directly from the humidifier 6 to the humidification duct 28 through the supply and exhaust hose 68. When the air conditioning indoor unit 2 is performing humidification operation, humidified outside air is blown out from the humidification duct 28. During humidification operation, the humidification operation in the humidifier 6 is performed, and humidified outside air is sent from the humidifier 6 to the humidification duct 28 through the supply and exhaust hose 68. A duct filter 28b is provided in the humidification duct 28. Outside air sent through the air supply / exhaust hose 68 passes through the duct filter 28b and is blown into the casing 23.

[0033] The electrostatic atomizer 70 (see FIG. 11) including the electrostatic atomization unit 75 is disposed outside the air intake passage R1. In the example shown in FIG. 3 to FIG. 6, the electrostatic atomizer 70 including the electrostatic atomization unit 75 is disposed inside the casing 23. The electrostatic atomizer 70 including the electrostatic atomization unit 75 is disposed on the other end side of the casing 23 in the longitudinal direction D1. In the air conditioning indoor unit 2, the electrostatic atomizer 70 is disposed on the other end side of the casing 23, so that the electrostatic atomization unit 75 is disposed outside the air intake passage R1. More specifically, the electrostatic atomizer 70 including the electrostatic atomization unit 75 is disposed outside the air intake passage R1 and the other passages R2. The electrostatic atomizer 70 including the electrostatic atomization unit 75 takes in air for discharging liquid particles from a space other than the ventilation passage FP. 6, in the air conditioning indoor unit 2, an electrostatic atomization device 70 including an electrostatic atomization unit 75 takes in air for discharging liquid particles from a space IS other than the air passage FP inside the casing 23. This space IS is a space near the other end E2 inside the casing 23. The other end E2 of the casing 23 is the right side surface of the casing 23.

[0034] The control device 81 disposed in the air conditioning indoor unit 2 is connected to the motor 22m of the fan 22 and the motor 27m of the horizontal flap 27, as shown in FIG. 4. The control device 81 can control the rotation speed of the motor 22m of the fan 22 and the rotation angle of the motor 27m of the horizontal flap. The control device 81 is connected to an outdoor control board 82 (see FIG. 4) disposed in the air conditioning outdoor unit 4. Here, a case will be described in which the control device 81 has a timer 81a, a control arithmetic device 81b, and a storage device 81c, but the timer 81a, the control arithmetic device 81b, and the storage device 81c may be provided in other locations of the control unit 8. For example, the timer 81a, the control arithmetic device 81b, and the storage device 81c may be provided in the outdoor control board 82. The control device 81 can detect the temperature of the indoor air by the indoor temperature sensor 31, and can detect the relative humidity of the indoor air by the indoor humidity sensor 32. The control device 81 can set the on / off timing of the electrostatic atomization device 70 using the timer 81a.

[0035] The air conditioning indoor unit 2 has an electrical equipment box 90 disposed in the casing 23 and extending in the longitudinal direction D1 (see FIG. 3). In the air conditioning indoor unit 2, the control device 81 is housed in a first electrical equipment room 91 (see FIG. 5) of the electrical equipment box 90. The first electrical equipment room 91 is disposed on one end side of the casing 23. The first electrical equipment room 91 is a space in which a first electrical circuit component driven by a voltage of less than 50 volts is housed. The first electrical circuit component includes electrical circuit components constituting the control device 81. The electrical equipment box 90 has a second electrical equipment room 92 on the other end side. The second electrical equipment room 92 is a space in which a second electrical circuit component driven by a voltage of 50 volts or more is housed. The second electrical circuit component includes electrical circuit components for supplying power to the electrostatic atomization unit 75. The second electrical equipment room 92 is disposed on the other end side of the casing 23. Since the second electrical equipment chamber 92 is disposed on the other end side, the wiring distance from the second electrical equipment chamber 92 to the electrostatic atomization unit 75 can be shortened.

[0036] (2-1-1) Humidification duct As shown in Figs. 7, 8, 9 and 10, the humidifying duct 28 has an outlet opening 28a, a duct filter 28b, a wide portion 28c, a connection portion 28d and an air supply opening 28e. An air supply / exhaust hose 68 is connected to the cylindrical connection portion 28d. Outside air flows in from the air supply opening 28e at the end of the connection portion 28d through the air supply / exhaust hose 68. A wide portion 28c that is wider in the longitudinal direction D1 (left-right direction) than the connection portion 28d is disposed downstream of the connection portion 28d. A duct filter 28b is removably attached to the wide portion 28c. The front panel 23p of the air conditioning indoor unit 2 can be opened to pull out the duct filter 28b from the casing 23 toward the front. In the wide portion 28c, an outlet opening 28a is formed downstream of the duct filter 28b. The outlet opening 28a faces the heat exchanger 21. In the air conditioning indoor unit 2 of this embodiment, the outlet opening 28a is disposed below the air filter 24, and the outside air blown out from the outlet opening 28a flows into the heat exchanger 21 without passing through the air filter 24. Because the fan 22 generates an air flow perpendicular to the longitudinal direction D1, the outside air blown out from the humidifying duct 28 to one end side of the casing 23 flows through the intake air flow path R1 and does not flow through the other flow path R2.

[0037] (2-1-2) Electrostatic atomizer The electrostatic atomization unit 75 is disposed in the electrostatic atomization device 70 as shown in FIG. 11. The electrostatic atomization device 70 includes, for example, a housing 71, an inlet 72a, an outlet 72b, a blower 74, and a high-voltage transformer 73. The outlet 72b is connected to the ventilation passage FP. The outlet 72b is connected to, for example, a scroll portion connected to the outlet 23b of the casing 23 in the ventilation passage FP. The inlet 72a draws in indoor air from a location other than the ventilation passage FP in the casing 23. In order to discharge the air drawn in from the inlet 72a through the electrostatic atomization unit 75 in the housing 71 and from the outlet 72b, it is preferable that the electrostatic atomization device 70 includes a blower 74 in the housing 71. However, if an air flow is generated in the housing 71 without the blower 74, the blower 74 may be omitted.

[0038] 12, the electrostatic atomization unit 75 converts moisture condensed on the discharge electrode 78 into ion-containing water particles 77 by discharging, and releases the water particles. To generate a high-voltage discharge at the discharge electrode 78, a high voltage is applied between the discharge electrode 78 and a counter electrode 79 by the high-voltage transformer 73. Due to the discharge phenomenon occurring at the discharge electrode 78, the moisture on the discharge electrode 78 becomes nanometer-sized particles and is charged, generating an electrostatic mist.

[0039] The electrostatic atomization unit 75 includes, for example, a cooling element 76 to generate condensed water on the discharge electrode 78. The cooling element 76 has a heat dissipation surface 76a and a cooling surface 76b. For example, a heat dissipation section 76c is thermally connected to the heat dissipation surface 76a. For example, a heat dissipation fin can be used for the heat dissipation section 76c. The cooling surface 76b is thermally connected to the discharge electrode 78 via an electrical insulator (not shown). The discharge electrode 78, which is installed upright on the cooling surface 76b, is disposed at a predetermined distance from the counter electrode 40. The cooling element 76 includes, for example, a Peltier element. A plurality of cooling elements 76 may be provided. When the cooling element 76 is a Peltier element, when a direct current is applied to the Peltier element, heat absorption occurs at the cooling surface 76b and heat generation occurs at the heat dissipation surface 76a, so that the temperature of the discharge electrode 78 thermally connected to the cooling surface 76b drops. When the temperature of the discharge electrode 78 falls below the dew point temperature of the air drawn in from the intake port 72a, condensation occurs on the discharge electrode 78. By connecting the discharge electrode 78 to the negative side of the high-voltage transformer 73 and connecting the counter electrode 79 to the positive side of the high-voltage transformer 73, negative ions are generated in the water particles 77, and the electrostatic mist generated by the discharge electrode 78 becomes negatively charged.

[0040] (2-2) Air conditioner outdoor unit As shown in Fig. 4, the air conditioning outdoor unit 4 includes a compressor 41, a four-way valve 42, an accumulator 43, an outdoor heat exchanger 44, an outdoor expansion valve 45, an outdoor fan 46, and a housing 47. The compressor 41, the four-way valve 42, the accumulator 43, the outdoor heat exchanger 44, the outdoor expansion valve 45, and the outdoor fan 46 are housed in the housing 47. The housing 47 has a rear opening 47a (see Fig. 4) that draws in outside air, and a front opening 47b (see Figs. 1 and 4) that blows out air after heat exchange. The rear opening 47a is disposed on the rear side of the housing 47. The air conditioning outdoor unit 4 functions as a heat source unit that supplies thermal energy to the air conditioning indoor unit 2.

[0041] The compressor 41 sucks in, compresses, and discharges gas refrigerant. The compressor 41 is a variable displacement compressor whose operating capacity can be changed by adjusting the operating frequency of the motor 41m by an inverter, for example. The higher the operating frequency, the larger the operating capacity of the compressor 41. The four-way valve 42 has four ports. The first port P1 of the four-way valve 42 is connected to the discharge port of the compressor 41. The second port P2 of the four-way valve 42 is connected to one of the inlets and outlets of the outdoor heat exchanger 44. The third port P3 of the four-way valve 42 is connected to the accumulator 43. The fourth port P4 of the four-way valve 42 is connected to one of the inlets and outlets of the heat exchanger 21.

[0042] The accumulator 43 is connected between the third port P3 of the four-way valve 42 and the suction port of the compressor 41. The other inlet / outlet of the outdoor heat exchanger 44 is connected to one inlet / outlet of the outdoor expansion valve 45. The outdoor heat exchanger 44 exchanges heat between the refrigerant that flows into the interior from one inlet / outlet or the other inlet / outlet and the outside air. The other inlet / outlet of the outdoor expansion valve 45 is connected to the other inlet / outlet of the heat exchanger 21.

[0043] An outdoor control plate 82 constituting the control unit 8 is disposed inside the air conditioning outdoor unit 4. The outdoor control plate 82 is connected to the control device 81. The outdoor control plate 82 is connected to the motor 41m of the compressor 41, the four-way valve 42, and the motor 46m of the outdoor fan 46. The control unit 8 can control the operating frequency of the motor 41m of the compressor 41, the opening degree of the four-way valve 42, and the rotation speed of the motor 46m of the outdoor fan 46 via the outdoor control plate 82.

[0044] The refrigerant circuit 13 includes a compressor 41, a four-way valve 42, an accumulator 43, an outdoor heat exchanger 44, an outdoor expansion valve 45, and a heat exchanger 21. A refrigerant circulates in the refrigerant circuit 13. Examples of the refrigerant include fluorocarbons such as R32 refrigerant and R410 refrigerant, and carbon dioxide. In the vapor compression refrigeration cycle, the refrigerant is compressed and heated by the compressor 41, and then the refrigerant releases heat in the outdoor heat exchanger 44 or the heat exchanger 21. In the vapor compression refrigeration cycle, the refrigerant is decompressed and expanded by the outdoor expansion valve 45, and then the refrigerant absorbs heat in the heat exchanger 21 or the outdoor heat exchanger 44. In the accumulator 43, gas-liquid separation of the refrigerant sucked into the compressor 41 is performed. The four-way valve 42 switches the direction of the flow of the refrigerant in the refrigerant circuit 13.

[0045] (2-3) Humidifier 6 The humidifier 6 in this embodiment is integrated with the air conditioning outdoor unit 4. However, the humidifier 6 and the air conditioning outdoor unit 4 may be configured as separate bodies that can be separated. The humidifier 6 takes in moisture from the outside air. The humidifier 6 can generate high-humidity air by adding the moisture it has taken in to the outside air. The humidifier 6 sends this high-humidity air to the air conditioning indoor unit 2. During humidification operation, the air conditioning indoor unit 2 mixes the high-humidity air sent from the humidifier 6 with indoor air. The air conditioning indoor unit 2 humidifies the room by blowing the air mixed with the high-humidity air into the room RM (indoors). The humidifier 6 is controlled by the control unit 8.

[0046] The humidifier 6 can also stop the humidification operation and send the outside air to the air conditioning indoor unit 2 without humidifying it. The air conditioning indoor unit 2 mixes the outside air sent from the humidifier 6 with the indoor air during ventilation operation. The air conditioning indoor unit 2 can supply the outside air into the room RM (indoors) by blowing the air mixed with the outside air into the room RM. The humidifier 6 can also stop the humidification operation and exhaust the indoor air from the air conditioning indoor unit 2 to the outdoor OD without humidifying it. During ventilation operation, the air conditioning indoor unit 2 can supply the outside air into the room RM and exhaust the indoor air in the room RM to the outdoor OD.

[0047] As shown in Fig. 4, the humidifier 6 includes an adsorption rotor 61, a heater 62, a switching damper 63, an air supply / exhaust fan 64, an adsorption fan 65, a duct 66, and a housing 69. The humidifier 6 also includes an air supply / exhaust hose 68. As shown in Figs. 1 and 4, the housing 69 of the humidifier 6 is attached to the housing 47 of the air conditioning outdoor unit 4. The humidifier 6 includes an adsorption air outlet 69a, an adsorption air intake 69b, and a humidification air intake 69c in the housing 69.

[0048] The adsorption rotor 61 is, for example, a disk-shaped humidity control rotor having a honeycomb structure. The humidity control rotor can be formed, for example, by firing an adsorbent that has the property of adsorbing moisture in the air it comes into contact with. The adsorbent of the adsorption rotor 61 has the property of desorbing the adsorbed moisture when heated. When unheated air passes through the honeycomb-structured adsorption rotor 61, the moisture in the air is adsorbed by the adsorption rotor 61. When heated air passes through the honeycomb-structured adsorption rotor 61, the moisture of the adsorption rotor 61 is imparted to the air. The adsorption rotor 61 is driven to rotate by a motor 61m. The rotation speed of the adsorption rotor 61 can be changed by changing the rotation speed of the motor 61m.

[0049] The heater 62 is disposed between the humidified air intake 69c and the switching damper 63. The outside air taken in through the humidified air intake 69c passes through the heater 62, then passes through the adsorption rotor 61, and reaches the switching damper 63. When the air heated by the heater 62 passes through the adsorption rotor 61, moisture is desorbed from the adsorption rotor 61, and moisture is supplied from the adsorption rotor 61 to the heated outside air. The heater 62 can change its output, and can change the temperature of the air that has passed through the heater 62 according to the output. Within a specific temperature range, the adsorption rotor 61 tends to desorb more moisture as the temperature of the air passing through the adsorption rotor 61 increases. By changing the temperature of the heater 62 and the rotation speed of the adsorption rotor 61, the amount of moisture added to the outside air can be adjusted.

[0050] The switching damper 63 has a first inlet / outlet 63a and a second inlet / outlet 63b. The switching damper 63 can switch between the first inlet / outlet 63a and the second inlet / outlet 63b as the inlet for sucking in air when the supply / exhaust fan 64 is driving. When the air inlet is the first inlet / outlet 63a, outside air flows from the humidification air intake 69c through the adsorption rotor 61, the heater 62, the adsorption rotor 61, the first inlet / outlet 63a, the supply / exhaust fan 64, the second inlet / outlet 63b, the duct 66, the supply / exhaust hose 68, and the air conditioning indoor unit 2 in this order in the direction of the solid arrow in FIG. When the air inlet is switched to the second inlet / outlet 63b, air flows in the opposite direction, as indicated by the dashed arrow in Fig. 4, from the air conditioning indoor unit 2 through the supply / exhaust hose 68, duct 66, second inlet / outlet 63b, supply / exhaust fan 64, first inlet / outlet 63a, adsorption rotor 61, heater 62, adsorption rotor 61, and humidification air intake 69c. The switching damper 63 is switched by a motor 63m.

[0051] The supply and exhaust fan 64 is disposed between the first entrance 63a and the second entrance 63b of the switching damper 63. The supply and exhaust fan 64 generates an air flow from the first entrance 63a to the second entrance 63b or from the second entrance 63b to the first entrance 63a. The supply and exhaust fan 64 is driven by a motor 64m. One end of the supply and exhaust hose 68 is connected to the duct 66 and the other end is connected to the air conditioning indoor unit 2. With this configuration, the supply and exhaust hose 68 and the room RM are in communication with each other via the air conditioning indoor unit 2.

[0052] An adsorption fan 65 is disposed in a passage leading from the adsorption air intake 69b to the adsorption air outlet 69a, and the adsorption rotor 61 is disposed so as to hang over this passage. When the adsorption fan 65 generates an airflow from the adsorption air intake 69b to the adsorption air outlet 69a, moisture is adsorbed onto the adsorption rotor 61 from the outside air passing through the adsorption rotor 61. The adsorption fan 65 is driven by a motor 65m.

[0053] The motor 61m of the adsorption rotor 61, the motor 63m of the switching damper 63, the motor 64m of the supply / exhaust fan 64, and the heater 62 are connected to an outdoor control panel 82. The control unit 8 can use the outdoor control panel 82 to control the rotation speed of the adsorption rotor 61, the switching of the switching damper 63, the on / off of the supply / exhaust fan 64 and the adsorption fan 65, and the output of the heater 62.

[0054] (3) Operation of the air conditioning system and indoor air conditioning units (3-1) Overview The operation modes of the air conditioning system 1 include, for example, cooling operation, heating operation, dehumidification operation, humidification operation, fan operation, ventilation operation, and air purification operation. Note that a plurality of operations can be combined. For example, heating operation and humidification operation, cooling operation and humidification operation, fan operation and humidification operation, ventilation operation and cooling operation, ventilation operation and heating operation, ventilation operation and dehumidification operation, and ventilation operation and fan operation can be combined, and these combinations can further be combined with air purification operation.

[0055] (3-2) Cooling operation Before the start of the cooling operation, the control device 81 of the control unit 8 is instructed to perform the cooling operation and to specify a target temperature, for example, from a remote controller (not shown). During the cooling operation, the control unit 8 switches the four-way valve 42 to the state shown by the solid line in FIG. 4. During the cooling operation, the four-way valve 42 switched in this way allows the refrigerant to flow between the first port P1 and the second port P2, and allows the refrigerant to flow between the third port P3 and the fourth port P4. During the cooling operation, the four-way valve 42 allows the high-temperature, high-pressure gas refrigerant discharged from the compressor 41 to flow to the outdoor heat exchanger 44. In the outdoor heat exchanger 44, heat exchange is performed between the refrigerant and the outside air supplied by the outdoor fan 46. The refrigerant cooled by the outdoor heat exchanger 44 is decompressed by the outdoor expansion valve 45 and flows into the heat exchanger 21. In the heat exchanger 21, heat exchange is performed between the refrigerant and the air supplied by the fan 22. The air supplied by the fan 22 may be indoor air only or indoor air and outdoor air. The refrigerant warmed by heat exchange in the heat exchanger 21 is sucked into the compressor 41 via the four-way valve 42 and the accumulator 43. The indoor air cooled by the heat exchanger 21 or a mixture of indoor air and outdoor air is blown out from the air conditioning indoor unit 2 into the room RM, thereby cooling the room. In this air conditioner 10, in cooling operation, the heat exchanger 21 functions as a refrigerant evaporator to cool the room RM, and the outdoor heat exchanger 44 functions as a refrigerant radiator. The control unit 8 controls the air conditioning indoor unit 2 and the air conditioning outdoor unit 4 so as to bring the temperature detected by the indoor temperature sensor 31 closer to a target temperature.

[0056] (3-3) Heating operation Before the start of the heating operation, the control device 81 of the control unit 8 is instructed to perform the heating operation and to specify a target temperature, for example, from a remote controller. During the heating operation, the control unit 8 switches the four-way valve 42 to the state shown by the broken lines in FIG. 4. During the heating operation, the four-way valve 42 switched in this way allows the refrigerant to flow between the first port P1 and the fourth port P4, and allows the refrigerant to flow between the second port P2 and the third port P3. During the heating operation, the four-way valve 42 allows the high-temperature, high-pressure gas refrigerant discharged from the compressor 41 to flow to the heat exchanger 21. In the heat exchanger 21, heat exchange is performed between the air supplied by the fan 22 and the refrigerant. The air supplied by the fan 22 may be only indoor air, or indoor air and outdoor air. The refrigerant cooled by the heat exchanger 21 is decompressed by the outdoor expansion valve 45 and flows into the outdoor heat exchanger 44. In the outdoor heat exchanger 44, heat exchange is performed between the refrigerant and outdoor air supplied by the outdoor fan 46. The refrigerant warmed by heat exchange in the outdoor heat exchanger 44 is sucked into the compressor 41 via the four-way valve 42 and the accumulator 43. The indoor air warmed by the heat exchanger 21 or a mixture of indoor air and outdoor air is blown out from the air conditioning indoor unit 2 into the room RM, thereby heating the room. In this air conditioner 10, during heating operation, the heat exchanger 21 functions as a refrigerant radiator to heat the room RM, and the outdoor heat exchanger 44 functions as an evaporator of the refrigerant. The control unit 8 controls the air conditioning indoor unit 2 and the air conditioning outdoor unit 4 so as to bring the temperature detected by the indoor temperature sensor 31 closer to the target temperature.

[0057] (3-4) Fan operation Before starting the blowing operation, the control device 81 of the control unit 8 is instructed to perform the blowing operation from, for example, a remote controller. During the blowing operation, the control unit 8 stops the compressor 41 and stops the refrigeration cycle in the refrigerant circuit 13. The control unit 8 also stops the operation of the humidifier 6. During the blowing operation, there are cases where a target air volume is instructed from the remote controller and cases where the air conditioning indoor unit 2 automatically selects the target air volume. The control device 81 controls the motor 22m of the fan 22 so as to achieve the target air volume. For example, the control device 81 is configured to increase the rotation speed in the order of the LL tap, which has the lowest rotation speed, to the L tap, the M tap, and the H tap. When the blowing operation is being performed, the control unit 8 also stops the operation of the humidifier 6. During the blowing operation, the indoor air in the room RM is circulated by the air conditioning indoor unit 2.

[0058] (3-5) Humidification operation Before the start of the humidification operation, the control device 81 of the control unit 8 is instructed to perform the humidification operation and is also instructed to a target humidity by, for example, a remote controller. During the humidification operation in which only humidification is performed, the control unit 8 stops the compressor 41 and stops the refrigeration cycle in the refrigerant circuit 13. However, during the humidification heating operation, for example, the refrigeration cycle in the refrigerant circuit 13 is also performed simultaneously with the humidification operation.

[0059] When the control unit 8 receives an instruction to perform the humidification operation, it first causes the humidifier 6 to dry the supply and exhaust hose 68. After drying the supply and exhaust hose 68, the control unit 8 causes the humidifier 6 to start the humidification operation. The control unit 8 controls the adsorption fan 65 to be driven and the adsorption rotor 61 to rotate. The adsorption fan 65 is driven to cause the outside air to pass through the adsorption rotor 61, so that the adsorption rotor 61 adsorbs moisture from the outside air. The rotation of the adsorption rotor 61 moves the portion where the moisture is adsorbed to a place where the air heated by the heater 62 passes through. As a result, moisture is desorbed from the portion where the moisture is adsorbed to the heated air. The air that has passed through the adsorption rotor 61 and has become highly humid is sent to the room RM by the supply and exhaust fan 64 through the supply and exhaust hose 68 and the air conditioning indoor unit 2. In the humidification operation, the control device 81 drives the fan 22 of the air conditioning indoor unit 2 to blow out highly humid air into the room RM. The control unit 8 controls the air conditioning indoor unit 2, the air conditioning outdoor unit 4, and the humidifier 6 so that the humidity detected by a predetermined humidity sensor approaches the target humidity. The predetermined humidity sensor is a humidity sensor provided in a flow path through which air flows in the humidifier 6 and the air conditioning indoor unit 2. The predetermined humidity sensor is, for example, an indoor humidity sensor 32 or a humidity sensor attached to the humidification duct 28.

[0060] (3-6) Ventilation operation Before the start of the ventilation operation, the control device 81 of the control unit 8 is instructed to perform the ventilation operation from, for example, a remote controller. During the ventilation operation, the humidification operation is stopped. When only the ventilation operation is performed, the control unit 8 stops the compressor 41 and stops the refrigeration cycle in the refrigerant circuit 13. However, when, for example, cooling while ventilating or heating while ventilating is performed, the control unit 8 drives the compressor 41 to perform the refrigeration cycle in the refrigerant circuit 13. To stop the humidification operation, the rotation of the adsorption fan 65 and the adsorption rotor 61 is stopped. During the ventilation operation, the control unit 8 controls the motor 64m to drive the supply and exhaust fan 64. During the ventilation operation, the control unit 8 controls the switching damper 63 to switch between the supply air state and the exhaust air state. During the supply air state, outside air is taken in from the humidification air intake port 69c and blown out into the room RM through the supply and exhaust hose 68 and the air conditioning indoor unit 2. In the exhaust state, indoor air is exhausted from the room RM through the air conditioning indoor unit 2 and the supply and exhaust hose 68 through the humidified air intake 69c. In the ventilation operation, the control device 81 drives the fan 22 of the air conditioning indoor unit 2 to blow outside air into the room RM. In the ventilation operation, when supplying air, the humidification duct 28 functions as an air supply duct that supplies outside air that has not been humidified by the humidifier 6 as is.

[0061] (3-7) Air purifying operation The air conditioning system 1 can perform an air purification operation using the electrostatic atomization device 70. Here, the air purification operation is an operation that suppresses harmful components and / or odorous components in the air. The air purification operation is, for example, an operation that suppresses harmful components or odorous components with ion-containing water particles (electrostatic mist) generated by the electrostatic atomization device 70. The air purification operation using the electrostatic atomization device 70 is performed together with other operations, for example, a cooling operation, a heating operation, a dehumidification operation, a humidification operation, a fan operation, a ventilation operation, or an operation in combination thereof.

[0062] The control device 81 of the air conditioning indoor unit 2 controls the electrostatic atomization device 70 so as not to discharge in the electrostatic atomization unit 75 when outside air is being introduced into the room RM (indoors) during humidification operation or ventilation operation.

[0063] (4) Variations (4-1) Variation A In the above embodiment, the electrostatic atomization device 70 and the electrostatic atomization unit 75 are disposed inside the casing 23. However, the electrostatic atomization device 70 and the electrostatic atomization unit 75 may be disposed outside the casing 23.

[0064] (4-2) Variation B In the above embodiment, the electrostatic atomizer 70 and the electrostatic atomizer unit 75 are described as taking in air from outside the ventilation passage FP (the air supply passage R1 and the other passage R2). However, the air sent to the electrostatic atomizer 70 and the electrostatic atomizer unit 75 may be taken in from the other passage R2 as shown in Figs. 13 and 14. For example, the intake port 72a of the electrostatic atomizer 70 is connected to the other passage R2 downstream of the air filter 24 and upstream of the heat exchanger 21. The discharge port 72b of the electrostatic atomizer 70 is connected to a scroll portion (a part of the ventilation passage FP) connected to the outlet 23b of the casing 23, for example.

[0065] (4-3) Variation C In the above embodiment, the electrostatic atomization unit 75 is disposed in the electrostatic atomization device 70, and the blower 74 blows the electrostatic mist from the outlet 23b of the casing 23. However, the blower 74 may be omitted. For example, the blower 74 may be omitted by positioning the electrostatic atomization unit 75 in the air flow of the other flow path R2.

[0066] (4-4) Variation D In the above embodiment, a case has been described in which outside air is blown out from the outlet opening 28a of the humidification duct 28 toward the heat exchanger 21. However, the direction in which the outside air is blown out from the humidification duct 28 is not limited to the direction toward the heat exchanger 21. For example, as shown in Fig. 13, the outside air may be blown out in a direction perpendicular to the direction from the humidification duct 28 toward the heat exchanger 21.

[0067] (4-5) Variation E In the above embodiment, the case where the humidification duct 28 is used as the air supply member has been described. However, the air supply member is not limited to the humidification duct 28. For example, instead of the humidifier 6, an air supply and exhaust device that does not have a humidification function and only supplies and exhausts outside air may be provided outdoors. When an air supply and exhaust device is provided, an air supply duct is provided in the casing 23 instead of the humidification duct 28. When configured in this way, the air conditioning indoor unit 2 cannot perform a humidification operation, but can perform a ventilation operation to supply outside air to the room RM (indoors). The positional relationship between the air supply duct and the electrostatic atomization unit 75 can be set in the same manner as the positional relationship between the humidification duct 28 and the electrostatic atomization unit 75.

[0068] (5) Features (5-1) The above-mentioned air conditioning indoor unit 2 has an air intake flow path R1 through which outdoor air flows during humidification or ventilation operation in the casing 23. The electrostatic atomizer 70 and the electrostatic atomizer unit 75 are arranged outside the air intake flow path R1. In other words, the air flowing through the air intake flow path R1 does not flow through the electrostatic atomizer 70 and the electrostatic atomizer unit 75. The air that flows into the electrostatic atomizer 70 and the electrostatic atomizer unit 75 is the indoor air that enters the casing 23 from the room RM without passing through the ventilation path FP, the indoor air that is supplied from another flow path R2, or the indoor air outside the casing 23 when the electrostatic atomizer 70 is arranged outside the casing 23. The outdoor air does not flow into the electrostatic atomizer 70 and the electrostatic atomizer unit 75 configured in this way, even during humidification or ventilation operation. Therefore, by disposing the electrostatic atomization unit 75 outside the air supply passage R1 through which the outside air flows, the effect that changes in the state of the outside air, particularly high humidity outside air, have on the electrostatic atomization unit 75 can be suppressed.

[0069] (5-2) The air intake flow path R1 of the air conditioning indoor unit 2 is disposed on one end side of the longitudinal direction D1 of the casing 23. The electrostatic atomization device 70 and the electrostatic atomization unit 75 are disposed in the casing 23 and on the other end side of the longitudinal direction D1. In this way, with a simple configuration in which the air intake flow path R1 is disposed on one end side of the longitudinal direction and the electrostatic atomization unit 75 is disposed on the other end side, it is possible to suppress the influence of changes in the state of the outside air on the electrostatic atomization unit 75. The configuration in which the electrostatic atomization unit 75 is disposed on the other end side includes a case in which the electrostatic atomization unit 75 is disposed between the ventilation passage FP and the other end E2 of the casing 23 as in the above embodiment, and indoor air flowing from the room RM into the casing 23 is used. In addition, the configuration in which the electrostatic atomization unit 75 is disposed on the other end side includes a case in which indoor air flowing through another flow path R2 is sent to the electrostatic atomization unit 75 as in the modified example B.

[0070] (5-3) In the above-mentioned air conditioning indoor unit 2, the electrical equipment box 90 arranged to extend in the longitudinal direction D1 inside the casing 23 has a first electrical equipment chamber 91 at one end and a second electrical equipment chamber 92 at the other end. The second electrical equipment chamber 92 houses a second electric circuit component driven by a voltage of 50 volts or more for supplying power to the electrostatic atomization device 70, for example. By providing such a second electrical equipment chamber 92 at one end of the longitudinal direction D1 where the electrostatic atomization unit 75 is arranged, for example, the wiring distance from the second electrical equipment chamber 92 to the electrostatic atomization device 70 and the electrostatic atomization unit 75 can be shortened. As a result, it becomes easier to take measures against voltages of 50 volts or more.

[0071] (5-4) In the above-mentioned air conditioning indoor unit 2, the air guided to the electrostatic atomization unit 75 is taken in from the space between the ventilation passage FP and the other end E2 of the casing 23. The space between the ventilation passage FP and the other end E2 of the casing 23 is a space other than the ventilation passage FP. In the above-mentioned air conditioning indoor unit 2, the liquid particles discharged from the electrostatic atomization unit 75 are nano-sized water particles. Because the air introduced into the electrostatic atomization unit 75 is taken in from a space other than the ventilation passage FP, outside air is not mixed into the air introduced into the electrostatic atomization unit 75, and the impact of changes in the state of the outside air on the electrostatic atomization unit 75 can be reduced.

[0072] (5-5) In the above-described air conditioning indoor unit 2, the outlet opening 28a of the humidification duct 28, which is an air supply member, or the outlet opening of the air supply duct (not shown) is arranged to face the heat exchanger 21. By configuring the outlet opening 28a to face the heat exchanger 21, it is possible to prevent the occurrence of problems such as condensation forming on parts other than the heat exchanger 21 due to outside air hitting parts other than the heat exchanger 21 in the casing 23.

[0073] (5-6) The control device 81 of the above-mentioned air conditioning indoor unit 2 performs control so as not to discharge in the electrostatic atomization unit 75 when the outside air is introduced into the room RM (room). As a result, it is possible to prevent the electrostatic atomization unit 75 from being affected by the outside air when the outside air is introduced.

[0074] (5-7) The air intake flow path R1 of the above-mentioned air conditioning indoor unit 2 is a flow path that supplies humidified outdoor air during humidification operation. Even when humidified outdoor air flows through the air intake flow path R1 in this way, the electrostatic atomization unit 75 is disposed at a position outside the air intake flow path R1 through which the outdoor air flows, so that the effect of the humidity of the outdoor air on the electrostatic atomization unit 75 can be suppressed.

[0075] Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure described in the claims. [Explanation of symbols]

[0076] 2. Air conditioning indoor unit 21 Heat exchanger 22 Fan 23 Casing 23a Intake port 23b Air outlet 28 Humidification duct (example of air supply component) 70 Electrostatic atomizer 75 Electrostatic atomization unit 81 Control device 90 Electrical equipment box 91 Electrical Equipment Room No. 1 92 Second Electrical Equipment Room R1 Air supply passage FP ventilation path [Prior art documents] [Patent documents]

[0077] [Patent Document 1] JP 2014-20578 A

Claims

1. An air conditioning indoor unit (2) for conditioning air in a room, a heat exchanger (21) for exchanging heat between indoor air and outdoor air, which is outdoor air, and a heat medium; a casing (23) having an intake port (23a) for sucking in the indoor air from the room, an outlet port (23b) for blowing the air into the room, and an air passage (FP) extending from the intake port through the heat exchanger to the outlet port; an air supply member (28) disposed in the casing and defining an air supply flow path (R1) through which the outside air flows; an electrostatic atomization unit (75) disposed in the casing and emitting liquid fine particles containing ions by discharge; Equipped with The outside air reaches the ventilation passage by being guided by the air supply member, The electrostatic atomization unit is disposed between an end of the casing in a longitudinal direction (D1) and the heat exchanger (21), The electrostatic atomization unit takes in air in a space in the casing other than the ventilation passage in order to emit the liquid fine particles. Air conditioning indoor unit (2).

2. The electrostatic atomization unit discharges the liquid fine particles into the ventilation duct. The air conditioning indoor unit according to claim 1.

3. An air filter (24) installed downstream of the suction port and upstream of the heat exchanger; Further equipped with The electrostatic atomization unit takes in air from which dust has been removed by the air filter. The air conditioning indoor unit according to claim 1 or 2.

4. A fan (22) disposed within the casing; Further equipped with The fan generates an airflow that flows from the air inlet through the ventilation passage toward the air outlet. The air conditioning indoor unit (2) according to any one of claims 1 to 3.

5. The air supply member has a blow-out opening (28a) for blowing out the outside air, The blowing opening is disposed in the ventilation passage. An air conditioning indoor unit (2) according to any one of claims 1 to 4.

6. The blowing opening is arranged to face the heat exchanger. The air conditioning indoor unit (2) according to claim 5.

7. The electrostatic atomization unit is disposed outside the ventilation passage. The air conditioning indoor unit (2) according to any one of claims 1 to 6.

8. An electrical equipment box (90) disposed within the casing; Further equipped with The air supply passage is disposed on one end (E1) side in the longitudinal direction, The electrostatic atomization unit is disposed in the casing on the other end (E2) side in the longitudinal direction, The electrical component box extends in the longitudinal direction, The electrical equipment box has a first electrical equipment chamber (91) on the one end side for accommodating a first electrical circuit component driven by a voltage of less than 50 volts, and a second electrical equipment chamber (92) on the other end side for accommodating a second electrical circuit component driven by a voltage of 50 volts or more. The air conditioning indoor unit (2) according to any one of claims 1 to 3.

9. A control device (81) for controlling the electrostatic atomization unit; Further equipped with The control device controls the electrostatic atomization unit not to discharge when the outside air is introduced into the room. An air conditioning indoor unit (2) according to any one of claims 1 to 8.

10. The outside air flowing through the air supply member is humidified. An air conditioning indoor unit (2) according to any one of claims 1 to 9.

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