WO2023013584A1

WO2023013584A1 - Air-conditioning indoor unit and air conditioner

Info

Publication number: WO2023013584A1
Application number: PCT/JP2022/029501
Authority: WO
Inventors: 幸子松本
Original assignee: ダイキン工業株式会社
Priority date: 2021-08-06
Filing date: 2022-08-01
Publication date: 2023-02-09
Also published as: JP2023024252A; CN117813469A; WO2023013583A1; CN117836568A; JP7397027B2; JP2023024124A

Abstract

The present invention improves, in an air-conditioning indoor unit comprising an electrostatic atomization unit, the efficiency of fine liquid particle production by the electrostatic atomization unit. A humidification duct (28) having an outlet (28a), which is an exit port for supplying outdoor air that has been humidified to the indoor, is disposed inside a casing (23). An electrostatic atomization unit (75) which ejects fine liquid particles that contain ions produced by electric discharge is disposed in the internal space of the humidification duct (28), a bypass path of the humidification duct (28), or the vicinity of the outlet opening (28a) of the humidification duct (28). A control device (81) controls the electrostatic atomization unit (75). During humidification operation, the control device (81) causes the electrostatic atomization unit (75) to operate when the outdoor air is being supplied to the indoor via the humidification duct (28), or within a prescribed time after the supply of the outdoor air to the indoor has ended.

Description

Air conditioner indoor unit and air conditioner

　Regarding an air conditioning indoor unit that performs indoor air conditioning and an air conditioner equipped with an air conditioning indoor unit.

Air conditioning indoor units equipped with electrostatic atomization units have been known for some time. For example, as described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2014-20578), an electrostatic atomization unit of an air conditioner indoor unit uses moisture in the air to generate liquid particles containing ions by electric discharge. do.

Since the air conditioning indoor unit described in Patent Document 1 generates liquid particles from indoor air, when the humidity of the indoor air is set low, the efficiency of generating liquid particles in the electrostatic atomization unit is low. Become.

Air conditioning indoor units equipped with electrostatic atomization units have the problem of improving the generation efficiency of liquid particles in the electrostatic atomization unit.

The air conditioning indoor unit of the first aspect is an air conditioning indoor unit that performs indoor air conditioning, and includes a casing, a humidification duct, an electrostatic atomization unit, and a control device. The humidification duct is arranged in the casing and has an outlet for humidifying outside air, which is outdoor air, and supplying it to the room. The electrostatic atomization unit is located within the casing and emits liquid particles containing ions by electrical discharge. A controller controls the electrostatic atomization unit. During the humidification operation, the control device operates the electrostatic atomization unit while the outside air is being supplied to the room through the humidification duct or within a predetermined time after the supply of the outside air to the room is finished. .

In the air conditioner indoor unit of the first point of view, the moisture contained in the outside air is used to easily cause condensation in the electrostatic atomization unit, and the generation efficiency of water particles containing ions is improved. In the humidification operation, when the outside air is supplied to the room through the humidification duct, and by operating the electrostatic atomization unit within a predetermined time after the supply of the outside air is completed, the outside air is further humidified. By incorporating an electrostatic atomization unit, it is possible to increase the efficiency of generating water particles even when the humidity of the outside air is low.

The air conditioning indoor unit of the second aspect is the air conditioning indoor unit of the first aspect, and the electrostatic atomization unit is arranged within 100 mm from the outlet of the air supply member.

In the second aspect of the air conditioning indoor unit, air containing a large amount of outside air blown out from the outlet of the air supply member can be guided to the electrostatic atomization unit, making it easier for condensation to occur in the electrostatic atomization unit.

The air conditioning indoor unit of the third aspect is the air conditioning indoor unit of the first aspect or the second aspect, and is provided with a heat exchanger that is arranged in the casing and performs heat exchange between the indoor air, the outside air, and the heat medium. The electrostatic atomization unit is arranged upstream of the heat exchanger.

In the air conditioner indoor unit of the third aspect, the outside air before passing through the heat exchanger can be taken into the electrostatic atomization unit, and the absolute humidity of the air taken into the electrostatic atomization unit can be prevented from decreasing. can.

An air conditioning indoor unit according to a fourth aspect is the air conditioning indoor unit according to any one of the first aspect to the third aspect, and is a heat exchanger arranged in a casing for exchanging heat between the indoor air, the outside air, and the heat medium. and the humidification duct is arranged with its outlet facing the heat exchanger.

The air conditioning indoor unit according to the fifth aspect is the air conditioning indoor unit according to any one of the first aspect to the fourth aspect, and includes an air supply filter through which outside air taken into the electrostatic atomization unit passes.

In the air conditioner indoor unit of the fifth aspect, the air supply filter can prevent fine particles such as pollen from being mixed with the outside air and taken into the electrostatic atomization unit. can be suppressed.

The air conditioning indoor unit of the sixth aspect is the air conditioning indoor unit of the fifth aspect, and the electrostatic atomization unit is arranged downstream of the outlet of the air supply member. The air supply filter is arranged near the outlet of the air supply member.

In the air conditioning indoor unit of the sixth aspect, the air supply filter can be downsized by arranging the air supply filter in the vicinity of the outlet of the air supply member, and the air supply filter does not reduce the efficiency of air conditioning. can be prevented.

An air conditioner according to a seventh aspect is the air conditioner indoor unit according to any one of the first aspect to the sixth aspect, and is connected to the air conditioner indoor unit to form a refrigerant circuit that implements a vapor compression refrigeration cycle together with the air conditioner indoor unit. and a humidifier that is integrated with the air conditioner outdoor unit and humidifies the outside air supplied by the humidification duct.

An air conditioner according to an eighth aspect includes the air conditioner indoor unit according to any one of the first aspect to the sixth aspect, and a humidifier that humidifies the outside air supplied by the humidification duct, wherein the humidifier contains moisture in the outside air. and a heater for desorbing moisture from the adsorption rotor. The adsorption rotor and the heater add moisture to the outside air supplied through the humidification duct.

BRIEF DESCRIPTION OF THE DRAWINGS It is a conceptual diagram which shows the air conditioner containing the air-conditioning indoor unit which concerns on embodiment. It is a sectional view of an air-conditioning indoor unit concerning an embodiment. It is an exploded perspective view of an air-conditioning indoor unit concerning an embodiment. FIG. 2 is a diagram for explaining a refrigerant circuit and an air flow path included in the air conditioning system of FIG. 1; (a) It is the partially broken plan view which fracture|ruptured a part of air-conditioning indoor unit which concerns on embodiment. (b) It is the partially broken front view which fracture|ruptured a part of air-conditioning indoor unit which concerns on embodiment. Fig. 3 is a schematic cross-sectional view of the air conditioner indoor unit for explaining the arrangement position of the electrostatic atomization unit according to the embodiment; It is a front view which shows the external appearance of a humidification duct. It is a side view which shows the external appearance of a humidification duct. It is a rear view which shows the external appearance of a humidification duct. FIG. 8 is a cross-sectional view of the humidifying duct cut along line II of FIG. 7; It is a schematic diagram which shows the outline|summary of a structure of an electrostatic atomizer. Fig. 2 is a schematic cross-sectional view showing the outline of the configuration of the electrostatic atomization unit; 4 is a flowchart for explaining control during humidification operation of the electrostatic atomization unit according to the embodiment. 4 is a flowchart for explaining control during ventilation operation of the electrostatic atomization unit according to the embodiment. FIG. 7 is a schematic cross-sectional view of an air conditioner indoor unit for explaining the arrangement position of an electrostatic atomization unit according to Modification A; FIG. 11 is a perspective view showing a humidifying duct and an electrostatic atomizer according to modification B; FIG. 10 is a cross-sectional view showing a humidifying duct and an electrostatic atomization unit according to modification C; FIG. 11 is a perspective view showing a humidifying duct and an electrostatic atomization unit according to modification C; FIG. 7 is a schematic cross-sectional view of an air conditioner indoor unit for explaining the arrangement position of an electrostatic atomization unit according to Modification E. FIG. 9 is a flowchart for explaining control of an electrostatic atomization unit according to Modification F. FIG. 10 is a flowchart for explaining control of the electrostatic atomization unit according to Modification G. FIG.

(1) Outline of Configuration of Air Conditioning System (1-1) Outline of Overall Configuration of Air Conditioning System As shown in FIG. 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 expressions "top", "bottom", "front", and "back" shown in FIGS. 1, 2 and 6 are used to describe the direction of each arrow. There is Further, in FIGS. 4 and 6, thick arrows indicate the flow of air. The operation modes of the air conditioning system 1 include, for example, a cooling operation, a heating operation, a dehumidifying operation, a humidifying operation, an air blowing operation, a ventilation operation, and an air cleaning operation. The air conditioning system 1 includes a controller 8 that controls the air conditioning indoor unit 2 and the humidifier 6, as shown in FIG.

The air conditioning indoor unit 2 is installed in the room RM (see FIG. 1) and performs air conditioning in the room RM (indoor). As shown in FIGS. 1 and 4 , the air conditioning indoor unit 2 is included in the air conditioner 10 of the air conditioning system 1 . The air conditioner 10 includes an air conditioner indoor unit 2 and an air conditioner outdoor unit 4 . The air conditioner indoor unit 2 and the air conditioner outdoor unit 4 are connected by

refrigerant communication pipes

11 and 12 . The air conditioning indoor unit 2 , the air conditioning outdoor unit 4 , and the

refrigerant communication pipes

11 and 12 form a refrigerant circuit 13 . The air conditioning system 1 can perform, for example, a cooling operation, a heating operation, a dehumidification operation, a ventilation operation, and an air cleaning operation by using the air conditioning indoor unit 2 and the air conditioning outdoor unit 4 (air conditioner 10) without using the humidifier 6. can drive. In the refrigerant circuit 13, for example, the 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 the control unit 8 .

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

The air conditioner indoor unit 2 has a heat exchanger 21 as shown in FIG. The air conditioner indoor unit 2 performs heat exchange of 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 heat transfer fins 21a. During heat exchange, the air passes through the heat transfer fins 21a and the refrigerant flows through the heat transfer tubes 21b. The refrigerant flowing through the heat transfer tubes 21b is a kind 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 a plurality of times and penetrate each heat transfer fin 21a a plurality of times.

By using the humidifier 6 shown in FIGS. 1 and 4 together with the air conditioning indoor unit 2 and the air conditioning outdoor unit 4, the air conditioning system 1 can perform, for example, humidification operation and ventilation operation. In other words, the air-conditioning indoor unit 2 of the air-conditioning system 1 configured as described above can perform operations corresponding to, for example, cooling operation, heating operation, dehumidification operation, humidification operation, ventilation operation, ventilation operation, and air cleaning operation. be. The humidifier 6 has an air supply/exhaust hose 68 that communicates with the room via the air conditioning indoor unit 2 . The air conditioning indoor unit 2 can humidify the room by increasing the humidity in the room RM with the moisture supplied into the room RM through the air supply/exhaust hose 68 by the humidifier 6 . In addition, the air conditioning indoor unit 2 can ventilate the room RM with the outside air supplied into the room RM (inside the room) through the air supply/exhaust hose 68 by the humidifier 6 . The ambient air described in this disclosure is outdoor OD air.

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 plate 82 that controls the air conditioning outdoor unit 4 and the humidifier 6 . The control device 81 and the outdoor control board 82 are controllers implemented by, for example, microcomputers. 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 GPU can be used for the control arithmetic unit 81b. The control arithmetic device 81b reads a program stored in the storage device 81c, and performs, for example, predetermined sequence processing and arithmetic processing according to this program. Furthermore, the control arithmetic device 81b can write the arithmetic result to the storage device 81c and read the information stored in the storage device 81c according to the program.

(1-2) Arrangement of Electrostatic Atomization Unit of Air Conditioner Indoor Unit The air conditioner indoor unit 2 includes an electrostatic atomization unit 75 shown in FIG. The electrostatic atomization unit 75 is a device that emits liquid particles containing ions by electric discharge. The electrostatic atomization unit 75 is arranged near the exit of the humidification duct 28, which is the air supply member shown in FIG. The humidification duct 28 is a member that allows outside air to flow. The fact that the electrostatic atomization unit 75 is arranged in the vicinity of the outlet of the humidification duct 28 which is an air supply member means that the air supplied by the humidification duct 28 flows to the electrostatic atomization unit 75 . That is. In addition, in this embodiment, the outlet of the humidification duct 28 is located at the blow-out opening 28a (see FIG. 10).

The air conditioning indoor unit 2 includes a casing 23. The casing 23 of the air conditioning indoor unit 2 described here has a frame 23f, a grille 23g, and a front panel 23p, as shown in FIG. 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 grille 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 the casing 23 is viewed from the front, and the other end E2 of the casing 23 in the longitudinal direction D1 is on the right when the casing 23 is viewed from the front. In the present disclosure, the side closer to the one end E1 than the center CE in 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 of the casing 23 and the one end E1 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 one end by an air supply/exhaust hose 68 . As a result, one end of the casing 23 in the longitudinal direction D1 becomes the air supply passage R1. In FIG. 4 , the flow of outside air is indicated by a thick dashed-dotted arrow. Since the outside air is not supplied from the air supply/exhaust hose 68 to the other end side of the casing 23 in the longitudinal direction D1, this other end side becomes a flow path R2 other than the air supply flow path. The electrostatic atomization unit 75 is arranged in the air supply passage R1.

(2) Detailed configuration (2-1) Air conditioning indoor unit As shown in FIGS. 2, 4 and 6, the air conditioning indoor unit 2 includes a heat exchanger 21, a fan 22, a casing 23, Equipped with a filter 24, a drain pan 26, a horizontal flap 27, a vertical flap (not shown), a humidification duct 28, and an electrostatic atomizer 70 (see FIG. 11) including an electrostatic atomizer unit 75. there is 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 the controller 81 .

The heat exchanger 21 is arranged upstream of the fan 22 in the ventilation passage FP from the suction port 23a to the blowout port 23b. The heat exchanger 21 has a downwardly open shape so as to cover the upper side of the fan 22 when viewed in the direction in which the heat transfer tubes 21b extend (when viewed from the side). Here, such a shape is called a Λ shape or a C shape. The heat exchanger 21 has a first heat exchange section 21F far from the wall WL and a second heat exchange section 21R close to the wall WL. A drain pan 26 is arranged under the lower portion of the first heat exchange portion 21F and the lower portion of the second heat exchange portion 21R of the Λ-shaped or C-shaped heat exchanger 21 . Condensation generated in the first heat exchange section 21</b>F of the heat exchanger 21 is received by the drain pan 26 arranged in the lower front portion of the heat exchanger 21 . Condensation generated in the second heat exchange section 21R of the heat exchanger 21 is received by the drain pan 26 arranged in the rear lower portion of the heat exchanger 21 .

A horizontal flap 27 and a vertical flap are arranged at the outlet 23b. The horizontal flap 27 vertically changes the direction of the air blown from the outlet 23b. Therefore, the horizontal flap 27 is configured so that the angle formed with the horizontal direction can be changed by a motor 27m. The vertical flap is configured to be able to change the direction of the air blown out from the outlet 23b to the left or right. The air conditioning indoor unit 2 drives, for example, a vertical flap with a motor (not shown) so as to change the angle formed with the front-rear direction.

An air filter 24 is arranged downstream of the suction port 23 a in the casing 23 and upstream of the heat exchanger 21 . Substantially all of the room air supplied to the heat exchanger 21 passes through the air filter 24 . Therefore, dust particles larger than the mesh of the air filter 24 are removed by the air filter 24 and do not reach the heat exchanger 21 .

The air conditioning indoor unit 2 includes a humidification duct 28 as an air supply member inside the casing 23 . As shown in FIG. 5, the humidification duct 28 is arranged on one end side of the casing 23 in the longitudinal direction D1 and is included in the air supply flow path R1 formed on the one end side of the casing 23 . In humidification duct 28, outlet opening 28a is arranged to face heat exchanger 21 (see FIG. 6). Outside air is blown out from the humidification duct 28 when the air conditioning indoor unit 2 is performing the ventilation operation. During the ventilation operation, the humidifying operation in the humidifier 6 is stopped, and outside air is sent from the humidifier 6 through the air supply/exhaust hose 68 to the humidification duct 28 as it is. Humidified outside air is blown out from the humidification duct 28 when the air conditioning indoor unit 2 is performing the humidification operation. During humidification operation, humidification operation is performed in the humidifier 6 , and humidified outside air is sent from the humidifier 6 to the humidification duct 28 through the air supply/exhaust hose 68 . The humidification duct 28 is provided with a duct filter 28b. Outside air sent through the air supply/exhaust hose 68 is blown out into the casing 23 through the duct filter 28b.

The electrostatic atomization unit 75 is arranged in the electrostatic atomization device 70 (see FIG. 11). The electrostatic atomization unit 75 is preferably arranged within 100 mm from the outlet opening 28 a of the humidifying duct 28 . An area AR1 indicated by a two-dot chain line shown in FIGS. 5 and 6 is an area within 100 mm from the blow-out opening 28a. In this embodiment, an electrostatic atomization unit 75 is arranged in the electrostatic atomization device 70 attached to the surface of the humidification duct 28 in the area AR1. The electrostatic atomizer 70 and the electrostatic atomizer unit 75 are arranged upstream of the heat exchanger 21 .

The control device 81 arranged 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. The control device 81 can control the number of rotations 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 plate 82 (see FIG. 4) arranged inside the air conditioner outdoor unit 4 . Here, a case where the control device 81 has a timer 81a, a control arithmetic device 81b, and a storage device 81c will be described. It may be provided in place. For example, the timer 81a, the control arithmetic device 81b, and the storage device 81c may be provided on the outdoor control board 82. FIG. The control device 81 can detect the temperature of the indoor air with the indoor temperature sensor 31 and the relative humidity of the indoor air with the indoor humidity sensor 32 . The controller 81 can set the on/off timing of the electrostatic atomizer 70 using the timer 81a.

(2-1-1) Humidification Duct As shown in FIGS. 7, 8, 9 and 10, the humidification duct 28 includes a blowout opening 28a, a duct filter 28b, a wide portion 28c, a connection portion 28d, and a feeder. It has an air opening 28e. A supply/exhaust hose 68 is connected to the cylindrical connecting portion 28d. Outside air flows through the air supply/exhaust hose 68 from the air supply opening 28e at the tip of the connection portion 28d. A wide portion 28c that is wider in the longitudinal direction D1 (horizontal direction) than the connecting portion 28d is arranged downstream of the connecting portion 28d. A duct filter 28b is detachably attached to the wide portion 28c. By opening the front panel 23p of the air conditioning indoor unit 2, the duct filter 28b can be pulled out from the casing 23 forward. A blowout opening 28a is formed downstream of the duct filter 28b in the wide portion 28c. Blow-out opening 28 a faces heat exchanger 21 . In the air conditioning indoor unit 2 of the present embodiment, the blowout opening 28a is arranged below the air filter 24, and the outside air blown out from the blowout opening 28a flows into the heat exchanger 21 without passing through the air filter 24. Since the fan 22 generates an air flow in a direction perpendicular to the longitudinal direction D1, the outside air blown out from the humidification duct 28 to one end side of the casing 23 flows through the air supply flow path R1 and then into the other flow path R2. does not flow.

A supply air humidity sensor 33 is attached to the humidification duct 28 . In the example shown in FIG. 9, the supply air humidity sensor 33 is attached to the outlet opening 28a. The supply air humidity sensor 33 measures the relative humidity of the outside air supplied by the humidification duct 28 . The supply air humidity sensor 33 is connected to the control device 81 and transmits data of the detected outside air relative humidity to the control device 81 .

(2-1-2) Electrostatic atomization device The electrostatic atomization unit 75 is arranged in the electrostatic atomization device 70 as shown in FIG. The electrostatic atomizer 70 includes, for example, a housing 71, an inlet 72a, an outlet 72b, a blower 74, and a high-voltage transformer 73. The electrostatic atomizer 70 is attached to the upper surface of the humidification duct 28 . Here, the case where the electrostatic atomizer 70 is attached to the upper surface of the humidification duct 28 is described as an example. It may be on the side. The discharge port 72b is arranged at the top of the housing 71 of the electrostatic atomizer 70 . Here, the suction port 72a is arranged on the surface of the housing 71 adjacent to the blowout opening 28a of the humidification duct 28 . Although the suction port 72a is arranged in the rear part of the housing 71 here, it may be arranged in another part of the housing 71, for example, on the end surface of the housing 71 in the longitudinal direction. A discharge port 72 b of the electrostatic atomizer 70 is arranged downstream of the air filter 24 . The intake port 72 a sucks air from the ventilation passage FP of the casing 23 . The electrostatic atomizer 70 includes a blower 74 in the housing 71 so that the air sucked from the suction port 72a passes through the electrostatic atomization unit 75 in the housing 71 and is discharged from the discharge port 72b. It is preferable to have However, if airflow is generated in the housing 71 without the blower 74, the blower 74 may be omitted.

As shown in FIG. 12, the electrostatic atomization unit 75 converts water condensed on the discharge electrode 78 into water fine particles 77 containing ions by discharging and emits the water. A high voltage is applied between the discharge electrode 78 and the counter electrode 79 by the high voltage transformer 73 in order to generate a high voltage discharge at the discharge electrode 78 . Due to the discharge phenomenon that occurs in the discharge electrode 78, the moisture on the discharge electrode 78 turns into nanometer-sized fine particles and is charged, generating electrostatic mist.

The electrostatic atomization unit 75 is equipped with, for example, a cooling element 76 in order 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 portion 76c is thermally connected to the heat dissipation surface 76a. A heat radiation fin, for example, can be used for the heat radiation portion 76c. The cooling surface 76b is thermally connected to the discharge electrode 78 via an electrical insulator (not shown). The discharge electrode 78 installed upright on the cooling surface 76b is arranged to be separated from the counter electrode 40 by a predetermined distance. The cooling element 76 is, 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 passed through the Peltier element, the cooling surface 76b absorbs heat and the heat radiation surface 76a generates heat. The temperature of electrode 78 decreases. When the temperature of the discharge electrode 78 drops below the dew point temperature of the air sucked from the suction port 72a, dew 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 is negatively charged. do.

(2-2) Air Conditioner Outdoor Unit As shown in FIG. and a housing 47 . Compressor 41 , four-way valve 42 , accumulator 43 , outdoor heat exchanger 44 , outdoor expansion valve 45 and outdoor fan 46 are housed in housing 47 . The housing 47 has a rear opening 47a (see FIG. 4) for sucking outside air and a front opening 47b (see FIGS. 1 and 4) for blowing out air after heat exchange. The rear opening 47 a is arranged on the rear side of the housing 47 . The air conditioner outdoor unit 4 functions as a heat source unit that supplies thermal energy to the air conditioner indoor unit 2 .

The compressor 41 sucks in gas refrigerant, compresses it, and discharges it. The compressor 41 is, for example, a variable capacity compressor whose operating capacity can be changed by adjusting the operating frequency of the motor 41m with an inverter. As the operating frequency increases, the operating capacity of the compressor 41 increases. The four-way valve 42 has four ports. A first port P<b>1 of the four-way valve 42 is connected to a discharge port of the compressor 41 . A second port P<b>2 of the four-way valve 42 is connected to one inlet/outlet of the outdoor heat exchanger 44 . A third port P3 of the four-way valve 42 is connected to the accumulator 43 . A fourth port P4 of the four-way valve 42 is connected to one inlet/outlet of the heat exchanger 21 .

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 outdoor heat exchanger 44 has the other inlet/outlet connected to one inlet/outlet of the outdoor expansion valve 45 . The outdoor heat exchanger 44 exchanges heat between the refrigerant that has flowed into the inside from one entrance or the other entrance and the outside air. The outdoor expansion valve 45 has the other inlet/outlet connected to the other inlet/outlet of the heat exchanger 21 .

An outdoor control plate 82 that constitutes the control unit 8 is arranged in the air conditioner 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 41 m of the compressor 41 , the four-way valve 42 and the motor 46 m of the outdoor fan 46 . The control unit 8 can control the operating frequency of the motor 41 m of the compressor 41 , the opening degree of the four-way valve 42 , and the rotation speed of the motor 46 m of the outdoor fan 46 with the outdoor control plate 82 .

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 . Refrigerants include, for example, fluorocarbons such as R32 refrigerant and R410 refrigerant, and carbon dioxide. In the vapor compression refrigerating cycle, the refrigerant is compressed by the compressor 41 and heated, and then radiates heat in the outdoor heat exchanger 44 or the heat exchanger 21 . Also, 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 refrigerant flow in the refrigerant circuit 13 .

(2-3) Humidifier 6
The humidifier 6 of this embodiment is integrated with the air conditioner outdoor unit 4 . However, the humidifier 6 and the air conditioner outdoor unit 4 may be configured as separable separate bodies. The humidifier 6 takes in moisture from outside air. The humidifier 6 can generate high-humidity air by applying the taken-in moisture to the outside air. The humidifier 6 sends this high-humidity air to the air conditioner indoor unit 2 . The air conditioner indoor unit 2 mixes the high-humidity air sent from the humidifier 6 with the indoor air during the humidification operation. The air conditioner indoor unit 2 humidifies the room by blowing out air mixed with high-humidity air into the room RM. The humidifier 6 is controlled by the controller 8 .

The humidifier 6 can also stop the humidification operation and send outside air to the air conditioning indoor unit 2 without humidifying. 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 to the room by blowing out the air mixed with the outside air into the room RM (inside the room). 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. In the ventilation operation, the air conditioning indoor unit 2 can supply outside air into the room RM and exhaust indoor air in the room RM to the outside OD.

The humidifier 6, as shown in FIG. there is 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 conditioner outdoor unit 4 . The humidifier 6 has a housing 69 with an adsorption air outlet 69a, an adsorption air intake 69b, and a humidification air intake 69c.

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 that comes in contact with it. The adsorbent of the adsorption rotor 61 has the property of desorbing the adsorbed moisture when heated. When unheated air passes through the adsorption rotor 61 of the honeycomb structure, moisture in the air is adsorbed on the adsorption rotor 61 . When the heated air passes through the adsorption rotor 61 of the honeycomb structure, moisture of the adsorption rotor 61 is imparted to the air. The adsorption rotor 61 is rotated by being driven by a motor 61m. The rotation speed of the adsorption rotor 61 can be changed by changing the rotation speed of the motor 61m.

The heater 62 is arranged between the humidifying air intake 69 c and the switching damper 63 . Outside air taken in from the humidifying air intake 69 c passes through the heater 62 and then through the adsorption rotor 61 to reach 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 supplied from the adsorption rotor 61 to the heated outside air. The heater 62 can change its output, and the temperature of the air that has passed through the heater 62 can be changed 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 number of rotations of the adsorption rotor 61, the amount of water added to the outside air can be adjusted.

The switching damper 63 has a first entrance 63a and a second entrance 63b. The switching damper 63 can switch between the first inlet/outlet 63a and the second inlet/outlet 63b as the air inlet for sucking air when the air supply/exhaust fan 64 is driven. When the air inlet is the first inlet/outlet 63a, outside air flows from the humidifying air inlet 69c in the direction of the solid arrow in FIG. 1 entrance/exit 63a, air supply/exhaust fan 64, second entrance/exit 63b, duct 66, air supply/exhaust hose 68, and air conditioning indoor unit 2 in this order. When the air inlet is switched to the second inlet/outlet 63b, conversely, the supply/exhaust hose 68, the duct 66, the second inlet/outlet 63b, Air flows through the supply/exhaust fan 64, the first inlet/outlet 63a, the adsorption rotor 61, the heater 62, the adsorption rotor 61, and the humidification air intake 69c in this order. The switching of the switching damper 63 is performed by a motor 63m.

The air supply/exhaust fan 64 is arranged between the first entrance 63 a and the second entrance 63 b of the switching damper 63 . The air supply/exhaust fan 64 generates an air flow from the first inlet/outlet 63a to the second inlet/outlet 63b or from the second inlet/outlet 63b to the first inlet/outlet 63a. The air supply/exhaust fan 64 is driven by a motor 64m. The air supply/exhaust hose 68 has one end connected to the duct 66 and the other end connected to the air conditioning indoor unit 2 . With such a configuration, the air supply/exhaust hose 68 and the room RM communicate with each other via the air conditioning indoor unit 2 .

An adsorption fan 65 is arranged in a passage leading from the adsorption air intake 69b to the adsorption air outlet 69a, and the adsorption rotor 61 is arranged so as to hang over this passage. When the adsorption fan 65 generates an airflow from the adsorption air intake port 69b toward the adsorption air outlet 69a, the adsorption rotor 61 adsorbs moisture from the outside air passing through the adsorption rotor 61 . The suction fan 65 is driven by a motor 65m.

The motor 61 m of the adsorption rotor 61 , the motor 63 m of the switching damper 63 , the motor 64 m of the air supply/exhaust fan 64 and the heater 62 are connected to the outdoor control plate 82 . The controller 8 can control the number of rotations of the adsorption rotor 61 , the switching of the switching damper 63 , the ON/OFF of the air supply/exhaust fan 64 and the adsorption fan 65 , and the output of the heater 62 using the outdoor control plate 82 .

(3) Operation of Air Conditioning System and Air Conditioning Indoor Units (3-1) Overview 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 cleaning operation. be. Note that a plurality of operations can be combined. For example, heating operation and humidifying operation, cooling operation and humidifying operation, air blowing operation and humidifying operation, ventilation operation and cooling operation, ventilation operation and heating operation, ventilation operation and dehumidifying operation, and ventilation operation and air blowing operation can be combined. In addition, the humidifying operation, the heating operation and the humidifying operation, the cooling operation and the humidifying operation, and the blowing operation and the humidifying operation can be combined with the air cleaning operation.

(3-2) Cooling Operation Before starting the cooling operation, the controller 81 of the control section 8 is instructed to perform the cooling operation and the target temperature from, for example, a remote controller (not shown). During cooling operation, the controller 8 switches the four-way valve 42 to the state indicated by the solid line in FIG. During 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 the refrigerant to flow between the third port P3 and the fourth port P4. The four-way valve 42 during cooling operation allows the high-temperature, high-pressure gas refrigerant discharged from the compressor 41 to flow to the outdoor heat exchanger 44 . The outdoor heat exchanger 44 exchanges heat between the refrigerant and the outside air supplied by the outdoor fan 46 . The refrigerant cooled by the outdoor heat exchanger 44 is depressurized by the outdoor expansion valve 45 and flows into the heat exchanger 21 . The heat exchanger 21 exchanges heat between the refrigerant and the air supplied by the fan 22 . The air supplied by the fan 22 may be indoor air alone 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 is cooled by blowing the indoor air cooled by the heat exchanger 21 or the mixed air of the indoor air and the outdoor air from the air conditioning indoor unit 2 to the room RM. In the air conditioner 10, in the 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 controller 8 controls the air conditioning indoor unit 2 and the air conditioning outdoor unit 4 so that the temperature detected by the indoor temperature sensor 31 approaches the target temperature.

(3-3) Heating Operation Before starting the heating operation, the controller 81 of the control section 8 is instructed to perform the heating operation and the target temperature from, for example, a remote controller. During heating operation, the control unit 8 switches the four-way valve 42 to the state indicated by the dashed line in FIG. During 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 the refrigerant between the second port P2 and the third port P3. The four-way valve 42 during heating operation 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 is exchanged between the air supplied by the fan 22 and the refrigerant. The air supplied by the fan 22 may be indoor air alone or indoor air and outdoor air. The refrigerant cooled by the heat exchanger 21 is depressurized by the outdoor expansion valve 45 and flows into the outdoor heat exchanger 44 . The outdoor heat exchanger 44 exchanges heat between the refrigerant and the outside 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 room is heated by blowing out the indoor air warmed by the heat exchanger 21 or the mixed air of the indoor air and the outside air from the air conditioning indoor unit 2 into the room RM. In the air conditioner 10, in the heating operation, the heat exchanger 21 functions as a refrigerant radiator to warm the room RM, and the outdoor heat exchanger 44 functions as a refrigerant evaporator. The controller 8 controls the air conditioning indoor unit 2 and the air conditioning outdoor unit 4 so that the temperature detected by the indoor temperature sensor 31 approaches the target temperature.

(3-4) Blowing operation Before starting the blowing operation, the control device 81 of the control unit 8 is instructed to operate 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 . In the air blowing operation, there are cases where the target air volume is instructed from the remote controller, and 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 so that the rotation speed can be increased in order from the LL tap, which has the lowest rotation speed, to the L tap, the M tap, and the H tap. The controller 8 also stops the operation of the humidifier 6 when the air blowing operation is being performed. In the air blowing operation, the indoor air in the room RM is circulated by the air conditioning indoor unit 2 .

(3-5) Humidification Operation Before the humidification operation is started, the controller 81 of the control section 8 is instructed to perform the humidification operation and the target humidity from, for example, a remote controller. During 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, for example, in the humidification/heating operation, the refrigeration cycle in the refrigerant circuit 13 is also performed at the same time as the humidification operation.

Upon receiving the humidification operation instruction, the control unit 8 first causes the humidifier 6 to dry the air supply/exhaust hose 68 . After the air supply/exhaust hose 68 is dried, the controller 8 causes the humidifier 6 to start the humidification operation. The controller 8 drives the suction fan 65 and controls the suction rotor 61 to rotate. By driving the adsorption fan 65 and passing the outside air through the adsorption rotor 61 , the adsorption rotor 61 adsorbs moisture from the outside air. Due to the rotation of the adsorption rotor 61, the location where moisture is adsorbed moves to a location through which the air heated by the heater 62 passes. As a result, desorption of moisture occurs from the location where moisture has been adsorbed to the heated air. The air that has passed through the adsorption rotor 61 and becomes highly humid is sent to the room RM through the air supply/exhaust hose 68 and the air conditioning indoor unit 2 by the air supply/exhaust fan 64 . In the humidification operation, the control device 81 drives the fan 22 of the air conditioner indoor unit 2 in order to blow high-humidity 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 the 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 conditioner indoor unit 2 . Predetermined humidity sensors include, for example, the room humidity sensor 32 and the humidity sensor attached to the humidification duct 28 .

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

(3-7) Air Cleaning Operation The air conditioning system 1 can perform an air cleaning operation using the electrostatic atomizer 70 . Here, the air cleaning operation is an operation for suppressing harmful components and/or odorous components in the air. The air cleaning operation is, for example, an operation in which harmful or odorous components are suppressed with water particles (electrostatic mist) containing ions generated by the electrostatic atomizer 70 . Air cleaning operation using the electrostatic atomizer 70 is performed together with humidification operation or ventilation operation.

(3-7-1) Air Purification Operation and Humidification Operation The control device 81 of the air conditioning indoor unit 2 performs electrostatic atomization when outside air is introduced into the room RM (indoor) during humidification operation. Control the electrostatic atomizer 70 to operate the unit 75 . The controller 81 controls the electrostatic atomizer 70 according to the flow shown in FIG. 13, for example. The control device 81 determines whether or not the operation mode of the air conditioning indoor unit 2 instructed by a remote controller (not shown) or the like is an operation mode in which the electrostatic atomization unit 75 can be operated (step ST1). For example, when the instructed operation mode is a mode in which humidification operation and air cleaning operation are performed (Yes in step ST1), it is determined whether or not humidification is being performed by the humidifier 6 (step ST2). Since the control device 81 of the control unit 8 is connected to the outdoor control plate 82 of the control unit 8 that controls the humidifier 6, it can receive information on humidification by the humidifier 6 from the outdoor control plate 82. When humidification is being performed by the humidifier 6 (Yes in step ST2), the control device 81 controls the electrostatic atomization unit 75 to discharge (step ST3). When humidification by the humidifier 6 is not performed (No in step ST2), the control device 81 controls the electrostatic atomization unit 75 so as not to discharge (step ST4).

It is determined whether or not the operation mode will be changed while the air cleaning operation and the humidification operation are being performed (step ST5). When the operation mode has been changed (Yes in step ST5), the process returns to the determination (step ST1) of whether or not the changed operation mode is an operation mode in which the electrostatic atomization unit 75 can be operated. When it is determined that the operation mode has not been changed (No in step ST5), it is determined whether or not there is an instruction to end the operation (step ST6). If there is no instruction to end the operation (No in step ST6), the process returns to the beginning of the flow (step ST1). If there is an instruction to end the operation (Yes in step ST6), the control flow shown in FIG. 13 ends.

(3-7-2) When Air Purifying Operation and Air Supply in Ventilation Operation are Performed The controller 81 of the air conditioning indoor unit 2 operates when outside air is being introduced into the room RM (indoor) during air supply in the ventilation operation. First, the electrostatic atomizer 70 is controlled to operate the electrostatic atomizer unit 75 . At this time, the controller 81 controls the electrostatic atomizer 70 according to the flow shown in FIG. 14, for example. The control device 81 determines whether or not the operation mode of the air conditioning indoor unit 2 instructed by a remote controller (not shown) or the like is an operation mode in which the electrostatic atomization unit 75 can be operated (step ST1). For example, when the instructed operation mode is a mode in which the ventilation operation and the air cleaning operation are performed (Yes in step ST1), it is determined whether or not the humidifier 6 is supplying air for the ventilation operation ( step ST22). Since the control device 81 of the control unit 8 is connected to the outdoor control plate 82 of the control unit 8 that controls the humidifier 6, information regarding air supply by the humidifier 6 can be received from the outdoor control plate 82. . When humidification is being performed by the humidifier 6 (Yes in step ST22), the control device 81 controls the electrostatic atomization unit 75 to discharge (step ST3). Air that is more humid than outside air can be guided to the electrostatic atomization unit, and the efficiency of generating water particles can be increased even when the humidity of the outside air is low. When humidification by the humidifier 6 is not performed (No in step ST22), the control device 81 controls the electrostatic atomization unit 75 so as not to discharge (step ST4). Since the steps after step ST3 and step ST4 are the same as the flow shown in FIG. 13, description thereof is omitted.

(4) Modification (4-1) Modification A
Although the case where the electrostatic atomizer 70 is attached to the surface of the humidification duct 28 has been described in the above embodiment, the electrostatic atomizer 70 may be attached separately from the humidification duct 28 . For example, as shown in FIG. 15, when the outlet opening 28a of the humidification duct 28 faces the heat exchanger 21, the electrostatic atomizer 70 exchanges heat with the outlet opening 28a of the humidification duct 28. It may be arranged between the container 21 . With such a configuration, the electrostatic atomization device 70 and the electrostatic atomization unit 75 are arranged downstream of the blowout opening 28 a of the humidification duct 28 . As shown in FIG. 15, when the electrostatic atomization device 70 and the electrostatic atomization unit 75 are arranged downstream of the blowout opening 28a of the humidification duct 28, the duct filter 28b closes to the blowout opening of the humidification duct 28. It is preferably located in the vicinity of 28a. Also, the electrostatic atomizer 70 may be attached side by side with the humidifying duct 28 away from the humidifying duct 28 .

(4-2) Modification B
In the above embodiment, the electrostatic atomization unit 75 is arranged in the vicinity of the blowout opening 28a of the humidification duct 28, which is the outlet of the air supply member. However, the electrostatic atomization unit 75 may be arranged in the bypass route R3 of the humidification duct 28, which is the air supply member, as shown in FIG. A housing 71 of the electrostatic atomizer 70 is arranged side by side with a distance from the wide portion 28c of the humidification duct 28 . The housing 71 and the wide portion 28c communicate with each other through a cylinder, and this cylinder forms an inlet 72a of the electrostatic atomizer 70. As shown in FIG. The intake port 72a is provided downstream of a duct filter (not shown in FIG. 15). The discharge port 72b is provided separately from the blowout opening 28a of the humidification duct 28. As shown in FIG. Air is blown out from the outlet 72b in the same manner as the air is blown out from the blow-out opening 28a. Therefore, the air blower 74 is not provided in the electrostatic atomizer 70 shown in FIG. Although the illustration of the duct filter is omitted in FIG. 16, even in the form of the humidifying duct 28 shown in FIG. placed.

(4-3) Modification C
In the above embodiment, the electrostatic atomization unit 75 is arranged in the vicinity of the blowout opening 28a of the humidification duct 28, which is the outlet of the air supply member. However, as shown in FIGS. 17 and 18, the electrostatic atomization unit 75 may be arranged in the internal space IN1 of the humidification duct 28, which is the air supply member. The internal space IN1 is a space inside the wide portion 28c of the humidifying duct 28. As shown in FIG. The electrostatic atomization unit 75 is arranged directly in the internal space IN1 without the housing 71, and the air blower 74 is also omitted. Since an air current is generated in the humidifying duct 28, the electrostatic atomizing unit 75 can function as an electrostatic atomizing device even if the housing 71 and the air blower 74 are omitted and the electrostatic atomizing unit 75 is installed directly in the humidifying duct 28. 17 and 18, the illustration of the high-voltage transformer 73 is omitted, but the high-voltage transformer 73 is preferably arranged outside the humidification duct 28. As shown in FIG. The electrostatic atomization unit 75 is arranged downstream of the duct filter 28b. Water particles emitted from the electrostatic atomization unit 75 are emitted into the casing 23 from the blowout opening 28 a of the humidification duct 28 . The water particles are preferably emitted downstream of the air filter 24 so as not to reduce the number of water particles. The supply air humidity sensor 33 may be arranged in the internal space IN1 of the humidifying duct 28 as shown in FIGS. good.

(4-4) Modification D
In the above embodiment, the case of using the humidifying duct 28 as the air supply member has been described. However, the air supply member is not limited to the humidification duct 28 only. For example, instead of the humidifier 6, an air supply/exhaust device that only supplies and exhausts outside air without a humidification function may be provided outdoors. When an air supply/exhaust device is installed, an air supply duct is arranged in the casing 23 instead of the humidification duct 28 . In such a configuration, the air conditioning indoor unit 2 cannot perform the humidification operation, but can perform the ventilation operation to supply outside air to the room RM (indoor). The arrangement relationship between the air supply duct and the electrostatic atomization unit 75 can be set in the same manner as the arrangement relationship between the humidification duct 28 and the electrostatic atomization unit 75 .

(4-5) Modification E
Although the case where the electrostatic atomizer 70 is attached to the surface of the humidification duct 28 is described in the above embodiment, the electrostatic atomizer 70 may be attached so as to cover the blowout opening 28a of the humidification duct 28 . For example, as shown in FIG. 19, when the outlet opening 28a of the humidification duct 28 faces the heat exchanger 21, the electrostatic atomizer 70 exchanges heat with the outlet opening 28a of the humidification duct 28. It may be arranged at a position between the container 21 and covering the blowout opening 28a. With such a configuration, the electrostatic atomization device 70 and the electrostatic atomization unit 75 are arranged downstream of the blowout opening 28 a of the humidification duct 28 .

Also, the electrostatic atomizer 70 may be attached so as to cover the blowout opening 28a of the humidification duct 28 shown in FIGS. When the electrostatic atomizer 70 is attached to the position covering the blow-out opening 28a shown in FIGS. placed adjacent to each other.

When the electrostatic atomizer 70 is attached so as to cover the blowout opening 28a, the airflow generated in the humidification duct 28 can also generate an airflow inside the electrostatic atomizer 70. can be omitted. It should be noted that the duct filter 28b is preferably arranged upstream of the electrostatic atomizer 70 . For example, duct filter 28b may be attached to outlet opening 28a.

(4-6) Modification F
In the above embodiment, as described with reference to FIG. 13, the controller 81 controls the electrostatic atomization unit 75 to discharge (activate) while the humidifier 6 is performing humidification. explained the case. However, when the humidification operation and the air cleaning operation are performed, the humidification of the room RM by the humidifier 6 is completed during the period when the control device 81 controls discharge (operation) of the electrostatic atomization unit 75. It may be within a predetermined period of time. Information on the predetermined time is stored in the storage device 81c, for example. When counting the predetermined time, the control device 81 uses the timer 81a to count the predetermined time read from the storage device 81c, for example. Even after the humidification by the humidifier 6 is finished, the casing 23 remains in a high humidity state for a while. Therefore, for example, for several minutes after the humidification operation is finished, the electrostatic atomization unit 75 is operated to discharge electricity. It may be configured to allow Note that the predetermined time may vary depending on the humidity of the humidified air. If the humidity of the humidified air is high, the predetermined time is set shorter than when the humidity of the humidified air is low. may be In such control, for example, as shown in FIG. 20, the determination of whether or not humidification is being performed, which was performed in step ST2 of FIG. (step ST12). Since the control device 81 of the control unit 8 is connected to the outdoor control plate 82 of the control unit 8 that controls the humidifier 6, it can receive information on humidification by the humidifier 6 from the outdoor control plate 82. The control device 81 counts a predetermined time by the timer 81a after the humidifier 6 finishes humidification. The steps other than step ST12 in FIG. 20 are the same as the steps other than step ST2 in FIG. 13, so description thereof will be omitted.

(4-7) Modification G
In the above embodiment, the case where the control device 81 performs control such that the electrostatic atomization unit 75 is discharged (actuated) while humidification is being performed by the humidifier 6 has been described (see FIG. 13). However, when the ventilation operation and the air cleaning operation are performed, the supply of air to the room RM by the humidifier 6 ends during the period when the control device 81 controls discharge (operation) of the electrostatic atomization unit 75. It may be within a predetermined period of time. Even after the air supply by the humidifier 6 is finished, the inside of the casing 23 may remain in a high humidity state for a while. 75 may be actuated to cause discharge. In such control, for example, as shown in FIG. 21, the determination of whether or not humidification is being performed, which was performed in step ST2 of FIG. It may be replaced with judgment (step ST32). Since the control device 81 of the control unit 8 is connected to the outdoor control plate 82 of the control unit 8 that controls the humidifier 6, information regarding air supply by the humidifier 6 can be received from the outdoor control plate 82. . The control device 81 counts a predetermined time by the timer 81a after the humidifier 6 ends air supply. Note that when the electrostatic atomization unit 75 is operated, the control section 8 prevents air from being exhausted after being supplied. The steps other than step ST32 in FIG. 21 are the same as the steps other than step ST2 in FIG. 13, so description thereof will be omitted.

(4-8) Modification H
In the above embodiment, the measurement result of the supplied air humidity sensor 33 is not used for determining whether or not to discharge the electrostatic atomization unit 75 . However, the measurement result of the supplied air humidity sensor 33 may be used to determine whether or not to discharge the electrostatic atomization unit 75 . Rather than simply determining whether humidification or air is being supplied, for example, the measurement result of the supply air humidity sensor 33 is used to determine whether air is being supplied with a relative humidity equal to or higher than a predetermined value. You can judge. In addition, instead of determining whether it is within a predetermined time after the supply of outside air to the room ends, for example, using the measurement result of the supply air humidity sensor 33, the relative humidity of the supply air with a predetermined value or more It may be determined whether or not it is within a predetermined time after the end.

(5) Features (5-1)
In the air conditioning indoor unit 2 described above, a humidification duct 28 or an air supply duct, which is an air supply member, is arranged in the casing 23 . The air supply duct is, for example, a duct for supplying non-humidified outside air during ventilation operation. The humidification duct 28 when the humidifier 6 stops humidification and supplies air can be regarded as an air supply duct. Outside air, which is outdoor OD air, is supplied from the humidification duct 28 or the supply air duct to the room RM, which is an indoor room. The electrostatic atomization unit 75 is arranged in the vicinity of the inner space IN1 of the humidification duct 28, the bypass route R3 of the humidification duct 28, or the outlet opening 28a of the humidification duct 28. The internal space IN1 of the humidifying duct 28 is an example of the internal space of the air supply member. Another example of the internal space of the air supply member is the internal space of an air supply duct for supplying non-humidified outside air. A bypass route R3 of the humidification duct 28 is an example of a bypass route of the air supply member. Another example of the bypass path of the air supply member is the bypass path of the air supply duct described above. The blowout opening 28a of the humidification duct 28 is an example of the outlet of the air supply member. Another example of the outlet of the air supply member is the outlet of the aforementioned air supply duct. With such a configuration, moisture contained in the outside air is used to easily cause condensation in the electrostatic atomization unit 75, and the generation efficiency of water particles containing ions is improved.

(5-2)
The electrostatic atomization unit 75 is arranged within 100 mm from the blowout opening 28 a of the humidification duct 28 . Alternatively, it is arranged within 100 mm from the outlet of the supply air duct. By arranging the air outlet 28a or near the outlet of the air supply duct in this way, air containing a large amount of outside air blown from the outlet of the air supply member can be guided to the electrostatic atomization unit 75 . As a result, dew condensation in the electrostatic atomization unit 75 is facilitated.

(5-3)
Since the electrostatic atomization unit 75 is arranged upstream of the heat exchanger 21 , outside air before passing through the heat exchanger 21 can be taken into the electrostatic atomization unit 75 . As a result, it is possible to prevent the absolute humidity of the air taken into the electrostatic atomization unit 75 from decreasing.

(5-4)
Since the humidifying duct 28 of the air conditioning indoor unit 2 described above functions as a flow path for supplying humidified outside air, it is possible to increase the humidity of the air taken into the electrostatic atomization unit 75 when the outside air is dry. can be done.

(5-5)
In the case where the control device 81 is configured to operate the electrostatic atomization unit 75 when outside air is supplied to the room, outside air is supplied to the electrostatic atomization unit 75 when the electrostatic atomization unit 75 is operating. can be taken in. By taking outside air into the electrostatic atomization unit 75 in this way, it becomes easier to maintain a high generation efficiency of water particles.

(5-6)
As described with reference to FIG. 20, when the controller 81 operates the electrostatic atomization unit 75 within a predetermined time after the humidifier finishes humidification, the air containing a large amount of outside air is electrostatically atomized. It becomes easier for the unit 75 to incorporate. Since the electrostatic atomization unit 75 takes in air that has been further humidified from the outside air, the efficiency of generating water particles can be increased even when the humidity of the outside air is low.

(5-7)
The air conditioning indoor unit 2 described above includes a duct filter 28b, which is an air supply filter through which outside air taken into the electrostatic atomization unit 75 passes. In the air conditioning indoor unit 2 provided with the duct filter 28 b , the air supply filter can prevent fine particles such as pollen from being mixed with the outside air and being taken into the electrostatic atomization unit 75 . The air conditioning indoor unit 2 provided with the duct filter 28b can suppress the occurrence of abnormal discharge due to fine particles.

(5-8)
When the electrostatic atomization unit 75 is arranged downstream of the blowout opening 28a of the humidification duct 28 or the outlet of the air supply duct, the duct filter 28b is positioned at the blowout opening 28a of the humidification duct 28, as shown in FIG. Or it may be located near the outlet of the supply air duct. In such a case, the size of the duct filter 28b can be reduced, and it is possible to prevent the duct filter 28b from lowering the efficiency of air conditioning.

Although embodiments of the present disclosure have been described above, it will be appreciated that various changes in form and detail may be made without departing from the spirit and scope of the present disclosure as set forth in the appended claims. .

2 air conditioner indoor unit 4 air conditioner outdoor unit 6 humidifier 10 air conditioner 21 heat exchanger 23 casing 28 humidification duct (example of air supply member)
28b Duct filter (Example of supply air filter)
61 adsorption rotor 62 heater 75 electrostatic atomization unit 81 control device IN1 internal space R3 bypass route

JP 2014-20578 A

Claims

An air conditioning indoor unit (2) that performs indoor air conditioning,
a casing (23);
a humidification duct (28) disposed in the casing and having an outlet for humidifying outside air, which is outdoor air, and supplying it to the room;
an electrostatic atomization unit (75) disposed in the casing for emitting liquid particles containing ions by electrical discharge;
A control device (81) that controls the electrostatic atomization unit,
During the humidification operation, the control device controls the quiet air while the outside air is being supplied into the room through the humidification duct, or within a predetermined time after the supply of the outside air to the room ends. An air conditioning indoor unit (2) that operates an electro-atomization unit.
The electrostatic atomization unit is arranged within 100 mm from the outlet of the humidification duct,
The air conditioning indoor unit (2) according to claim 1.
A heat exchanger (21) arranged in the casing for exchanging heat between the indoor air and the outdoor air and a heat medium,
The electrostatic atomization unit is arranged upstream of the heat exchanger,
The air conditioning indoor unit (2) according to claim 1 or claim 2.
A heat exchanger (21) arranged in the casing for exchanging heat between the indoor air and the outdoor air and a heat medium,
The humidification duct is arranged such that the outlet faces the heat exchanger,
The air conditioning indoor unit (2) according to any one of claims 1 to 3.
An air supply filter (28b) through which the outside air taken into the electrostatic atomization unit passes,
Air conditioning indoor unit (2) according to any one of claims 1 to 4.
The electrostatic atomization unit is arranged downstream of the outlet of the humidification duct,
The air supply filter is arranged near the outlet of the humidification duct,
The air conditioning indoor unit (2) according to claim 5.
The air conditioning indoor unit according to any one of claims 1 to 6;
an air conditioner outdoor unit (4) connected to the air conditioner indoor unit and forming a refrigerant circuit that implements a vapor compression refrigeration cycle together with the air conditioner indoor unit;
An air conditioner (10) comprising: a humidifier (6) that is integrated with the air conditioner outdoor unit and humidifies the outside air supplied through the humidification duct.
The air conditioning indoor unit according to any one of claims 1 to 6;
A humidifier (6) that humidifies the outside air supplied by the humidification duct,
The humidifier has an adsorption rotor (61) for adsorbing moisture in the outside air and a heater (62) for desorbing moisture from the adsorption rotor. An air conditioner (10) that imparts moisture to the outside air.