CN117813469A

CN117813469A - Indoor unit of air conditioner

Info

Publication number: CN117813469A
Application number: CN202280054130.6A
Authority: CN
Inventors: 松本幸子
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2021-08-06
Filing date: 2022-08-01
Publication date: 2024-04-02
Also published as: CN117836568A; JP2023024124A; JP7397027B2; WO2023013584A1; WO2023013583A1; JP2023024252A

Abstract

In an air conditioning indoor unit provided with an electrostatic atomization unit, the generation efficiency of liquid particles in the electrostatic atomization unit is improved. A humidifying duct (28) as an air supply means for supplying outdoor air, i.e., outside air, into the room is disposed in the casing (23). An electrostatic atomizing unit (75) for discharging liquid particles containing ions generated by discharge is disposed in the interior space of the humidifying pipe (28), in the bypass path of the humidifying pipe (28), or in the vicinity of the blowout opening (28 a) of the humidifying pipe (28).

Description

Indoor unit of air conditioner

Technical Field

The present invention relates to an air conditioner indoor unit for performing indoor air conditioning.

Background

Conventionally, an air conditioning indoor unit equipped with an electrostatic atomization unit is known. For example, as described in patent document 1 (japanese patent application laid-open No. 2014-20578), an electrostatic atomizing unit of an air conditioning indoor unit generates liquid fine particles containing ions by discharge using moisture in air.

Disclosure of Invention

Problems to be solved by the invention

The air conditioning indoor unit described in patent document 1 generates liquid fine particles from indoor air, and therefore, when the humidity of the indoor air is set low, the efficiency of generating liquid fine particles in the electrostatic atomizing unit deteriorates.

In an air conditioning indoor unit provided with an electrostatic atomization unit, there is a problem of improving the efficiency of generating liquid particles in the electrostatic atomization unit.

Means for solving the problems

The air conditioning indoor unit according to the first aspect is an air conditioning indoor unit that performs indoor air conditioning, and includes a casing, an air supply member, and an electrostatic atomization unit. The air supply member is disposed in the housing and is a member for supplying outdoor air, i.e., outside air, into the room. The electrostatic atomizing unit is disposed in the housing and discharges liquid particles containing ions generated by the discharge. The electrostatic atomizing unit is disposed in the internal space of the air supply member, in the bypass path of the air supply member, or in the vicinity of the outlet of the air supply member.

In the air conditioning indoor unit according to the first aspect, moisture contained in the outside air is easily condensed in the electrostatic atomization unit, and the generation efficiency of the water particles containing ions is good.

In the air conditioning indoor unit according to the second aspect, in the air conditioning indoor unit according to the first aspect, the electrostatic atomization unit is disposed at a position within 100mm from the outlet of the air supply member.

In the air conditioning indoor unit according to the second aspect, the 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, and dew condensation is likely to occur in the electrostatic atomization unit.

An air conditioning indoor unit according to a third aspect is the air conditioning indoor unit according to the first or second aspect, wherein the air conditioning indoor unit includes a heat exchanger disposed in the casing and configured to exchange heat between indoor air and outside air and the heat medium. The electrostatic atomization unit is disposed upstream of the heat exchanger.

In the air conditioning indoor unit according to 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 being lowered.

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, wherein the air supply member is a humidifying duct that supplies humidified outside air.

In the air conditioning indoor unit according to the fourth aspect, the humidity of the air taken into the electrostatic atomizing unit when the outside air is dry can be increased by the humidifying duct.

An air conditioning indoor unit pertaining to a fifth aspect is the air conditioning indoor unit pertaining to any one of the first aspect to the fourth aspect, comprising a control device that controls the electrostatic atomizing unit. When the outside air is supplied into the chamber, the control device causes the electrostatic atomizing unit to operate.

In the air conditioning indoor unit according to the fifth aspect, when the electrostatic atomization unit is operated, the outside air can be taken into the electrostatic atomization unit, and the high generation efficiency of the water particles can be easily maintained.

An air conditioning indoor unit pertaining to a sixth aspect is the air conditioning indoor unit pertaining to any one of the first aspect to the fourth aspect, comprising a control device that controls the electrostatic atomizing unit. The control device operates the electrostatic atomizing unit within a predetermined time from the end of the supply of the external air into the chamber.

In the air conditioning indoor unit according to the sixth aspect, the electrostatic atomizing means is operated within a predetermined time after the end of the external supply, whereby the air containing a large amount of external air is taken in by the electrostatic atomizing means, and the efficiency of generating water particles can be improved.

An air conditioning indoor unit pertaining to a seventh aspect is the air conditioning indoor unit pertaining to any one of the first aspect to the sixth aspect, wherein the air conditioning indoor unit is provided with an air supply filter through which outside air taken into the electrostatic atomizing unit passes.

In the air conditioning indoor unit according to the seventh aspect, since particles such as pollen are prevented from being mixed with the outside air by the air supply filter and taken into the electrostatic atomization unit, occurrence of an abnormality in discharge due to the particles can be suppressed.

An air conditioning indoor unit pertaining to an eighth aspect is the air conditioning indoor unit pertaining to the seventh aspect, wherein the electrostatic atomizing unit is disposed downstream of the outlet of the air supply member. The air supply filter is disposed near the outlet of the air supply member.

In the air conditioning indoor unit according to the eighth aspect, the air supply filter is disposed near the outlet of the air supply member, so that the air supply filter can be miniaturized, and a reduction in air conditioning efficiency due to the air supply filter can be prevented.

Drawings

Fig. 1 is a conceptual diagram illustrating an air conditioner including an air conditioning indoor unit according to an embodiment.

Fig. 2 is a cross-sectional view of an air conditioning indoor unit according to an embodiment.

Fig. 3 is an exploded perspective view of an air conditioning indoor unit according to an embodiment.

Fig. 4 is a diagram for explaining a refrigerant circuit and an air flow path included in the air conditioning system of fig. 1.

Fig. 5 (a) is a partially cut-away plan view of an air conditioning indoor unit according to an embodiment. (b) The air conditioning indoor unit according to the embodiment is a partially cut-away front view.

Fig. 6 is a schematic cross-sectional view of an air conditioning indoor unit for explaining a position where an electrostatic atomizing unit according to the embodiment is disposed.

Fig. 7 is a front view showing the external appearance of the humidifying pipe.

Fig. 8 is a side view showing the external appearance of the humidifying pipe.

Fig. 9 is a rear view showing the appearance of the humidifying pipe.

Fig. 10 is a cross-sectional view of the humidifying pipe taken along line I-I of fig. 7.

Fig. 11 is a schematic diagram showing a schematic configuration of the electrostatic atomizing apparatus.

Fig. 12 is a schematic cross-sectional view showing an outline of the structure of the electrostatic atomizing unit.

Fig. 13 is a flowchart for explaining control during a humidifying operation of the electrostatic atomizing unit according to the embodiment.

Fig. 14 is a flowchart for explaining control during ventilation operation of the electrostatic atomizing unit according to the embodiment.

Fig. 15 is a schematic cross-sectional view of an air conditioning indoor unit for explaining the arrangement position of the electrostatic atomizing unit according to modification a.

Fig. 16 is a perspective view showing a humidifying pipe and an electrostatic atomizing device according to modification B.

Fig. 17 is a cross-sectional view showing a humidifying pipe and an electrostatic atomizing unit according to modification C.

Fig. 18 is a perspective view showing a humidifying pipe and an electrostatic atomizing unit according to modification C.

Fig. 19 is a schematic cross-sectional view of an air conditioning indoor unit for explaining the arrangement position of the electrostatic atomizing unit according to modification E.

Fig. 20 is a flowchart for explaining control of the electrostatic atomizing unit according to modification F.

Fig. 21 is a flowchart for explaining control of the electrostatic atomizing unit according to modification G.

Detailed Description

(1) Outline of structure of air conditioning system

(1-1) overview of the overall structure of an air Conditioning System

As shown in fig. 1, an air conditioning indoor unit 2 according to an 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 expressions such as "up", "down", "front" and "rear" shown in fig. 1, 2 and 6. In fig. 4 and 6, the flow of air is indicated by thick arrows. The operation modes of the air conditioning system 1 include, for example, a cooling operation, a heating operation, a dehumidifying operation, a humidifying operation, a blowing operation, a ventilation operation, and an air cleaning 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.

The air conditioning indoor unit 2 is provided in a room RM (see fig. 1), and performs air conditioning in the room RM (indoor). As shown in fig. 1 and 4, the air conditioning indoor unit 2 is included in an air conditioner 10 of the 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 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 constitute a refrigerant circuit 13. The air conditioning system 1 can perform, for example, a cooling operation, a heating operation, a dehumidifying operation, a blowing 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. In the refrigerant circuit 13, for example, a vapor compression refrigeration cycle is repeatedly performed during a cooling operation, a heating operation, and a dehumidifying operation. The air conditioning indoor unit 2 and the air conditioning outdoor unit 4 are controlled by the control unit 8.

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

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 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 21 a. In addition, at the time of heat exchange, air passes between the plurality of heat transfer fins 21a while the refrigerant flows in the heat transfer tubes 21b. The refrigerant flowing in the heat transfer tube 21b is one of the heat mediums. The heat transfer pipe 21b is thermally connected to the plurality of heat transfer fins 21a so as to pass through each heat transfer fin 21a plurality of times by being folded back a plurality of times.

By using the humidifier 6 shown in fig. 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, a humidification operation and a ventilation operation. In other words, the air conditioning indoor unit 2 of the air conditioning system 1 having such a configuration can perform operations corresponding to, for example, a cooling operation, a heating operation, a dehumidifying operation, a humidifying operation, a blowing operation, a ventilation operation, and an air cleaning operation. The humidifier 6 has an air supply/discharge hose 68 that communicates with the room through the air conditioning indoor unit 2. The air conditioning indoor unit 2 can humidify the room RM (indoor) with the humidifier 6 by increasing the humidity in the room by the moisture supplied to the room RM (indoor) through the supply/exhaust hose 68. The air conditioning indoor unit 2 can ventilate the room RM by the humidifier 6 with the outside air supplied to the room RM (indoor) through the air supply/exhaust hose 68. The outside air illustrated in this disclosure is air outside the OD.

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 board 82 that controls the air conditioning outdoor unit 4 and the humidifier 6. The control device 81 and the outdoor control board 82 are respectively, for example, controllers implemented by microcomputers. For example, the control device 81 includes a timer 81a, a control arithmetic device 81b, and a storage device 81c. The control arithmetic device 81b can use a processor such as a CPU or GPU. The control arithmetic device 81b reads out a program stored in the storage device 81c, and performs, for example, predetermined sequential processing and arithmetic processing in accordance with the program. Further, the control arithmetic device 81b can write the arithmetic result into the storage device 81c or read out the information stored in the storage device 81c according to a program.

(1-2) configuration of Electrostatic atomizing Unit of indoor Unit of air conditioner

The air conditioning indoor unit 2 includes an electrostatic atomizing unit 75 shown in fig. 4. The electrostatic atomizing unit 75 is a device that emits liquid particles containing ions generated by electric discharge. The electrostatic atomizing unit 75 is disposed near the outlet of the humidifying duct 28 as the air supply member shown in fig. 4. The humidifying duct 28 is a member capable of flowing outside air. In other words, the arrangement of the electrostatic atomizing unit 75 near the outlet of the humidifying duct 28 as the air supply means that the air supplied from the humidifying duct 28 flows to the electrostatic atomizing unit 75. In the present embodiment, the outlet of the humidifying duct 28 is located at the blowout opening 28a (see fig. 10).

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 herein includes a frame 23f, a grill 23g, and a front panel 23p. The structure of the casing 23 of the air conditioning indoor unit 2 is not limited to the structure described herein. For example, the front panel 23p and the grill 23g may be integrated. The housing 23 extends long in the longitudinal direction D1. One end E1 of the housing 23 in the longitudinal direction D1 is on the left hand side when the housing 23 is viewed from the front, and the other end E2 of the housing 23 in the longitudinal direction D1 is on the right hand side when the housing 23 is viewed from the front. In the present disclosure, a side of the housing 23 in the longitudinal direction D1 closer to the one end E1 than the center CE is referred to as one end side, and a side closer to the other end E2 than the center CE is referred to as the other end side. In other words, the region between the center CE and one end E1 of the housing 23 is one end side, and the region between the center CE and the other end E2 is the other end side. External air is supplied to one end side by an air supply and exhaust hose 68. As a result, one end side in the longitudinal direction D1 of the housing 23 becomes the air supply flow path R1. In fig. 4, the flow of the outside air is indicated by a thick arrow with a single-dot chain line. Since the other end side of the housing 23 in the longitudinal direction D1 is not supplied with the external air from the air supply/discharge hose 68, the other end side serves as a flow path R2 other than the air supply flow path. The electrostatic atomizing unit 75 is disposed in the air supply flow path R1.

(2) Detailed structure

(2-1) air conditioner indoor unit

As shown in fig. 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 baffle 27, a vertical baffle (not shown), a humidifying duct 28, and an electrostatic atomizing device 70 including an electrostatic atomizing unit 75 (see fig. 11). The air conditioning indoor unit 2 further 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 control device 81.

In the ventilation path FP from the suction port 23a toward the discharge port 23b, the heat exchanger 21 is disposed upstream of the fan 22. The heat exchanger 21 is opened downward so as to cover the upper side of the fan 22 when viewed in the extending direction (side view) of the heat transfer tube 21 b. Such a shape is referred to herein as a Λ shape or a C-word shape. The heat exchanger 21 has a first heat exchange portion 21F distant from the wall WL and a second heat exchange portion 21R close to the wall WL. A drain pan 26 is disposed below the lower portions of the first heat exchange portion 21F and the second heat exchange portion 21R of the Λ -shaped or C-shaped heat exchanger 21. Dew condensation generated in the first heat exchanging portion 21F of the heat exchanger 21 is received by the drain pan 26 disposed at the front lower portion of the heat exchanger 21. Dew condensation generated in the second heat exchanging portion 21R in the heat exchanger 21 is received by the drain pan 26 disposed at the rear lower portion of the heat exchanger 21.

A horizontal baffle 27 and a vertical baffle are disposed at the air outlet 23 b. The horizontal flap 27 changes the direction of the air blown out from the air outlet 23b up and down. Therefore, the horizontal barrier 27 is configured to be changeable in angle with respect to the horizontal direction by the motor 27 m. The vertical baffle plate is configured to be able to change the direction of the air blown out from the air outlet 23b to the left and right. The air conditioning indoor unit 2 drives the vertical barrier by, for example, a motor (not shown) so as to change the angle between the vertical barrier and the front-rear direction.

An air filter 24 is disposed in the housing 23 downstream of the suction port 23a 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 therefore does not reach the heat exchanger 21.

The air conditioning indoor unit 2 includes a humidification duct 28 as an air supply means in the casing 23. As shown in fig. 5, the humidification duct 28 is disposed on one end side in the longitudinal direction D1 of the housing 23, and is included in the air supply flow path R1 formed on one end side of the housing 23. In the humidification duct 28, the blowout opening 28a is arranged so as to face the heat exchanger 21 (see fig. 6). When the air conditioning indoor unit 2 is performing the ventilation operation, the outside air is blown out from the humidification duct 28. During the ventilation operation, the humidification operation of the humidifier 6 is stopped, and the outside air is directly supplied from the humidifier 6 to the humidification duct 28 via the air supply/exhaust hose 68. When the air conditioning indoor unit 2 is performing a humidification operation, humidified outside air is blown out from the humidification duct 28. During the humidification operation, the humidifier 6 is operated to humidify, and the humidified external air is supplied from the humidifier 6 to the humidification duct 28 via the air supply/exhaust hose 68. The humidifying pipe 28 is provided with a pipe filter 28b. The outside air sent through the air supply and exhaust hose 68 is blown out into the housing 23 through the duct filter 28b.

The electrostatic atomizing unit 75 is disposed in the electrostatic atomizing device 70 (see fig. 11). The electrostatic atomizing unit 75 is preferably disposed at a position within 100mm from the outlet of the humidifying duct 28, i.e., the blowout opening 28 a. The area AR1 shown by the two-dot chain line in fig. 5 and 6 is an area within 100mm from the air outlet 28 a. In the present embodiment, the electrostatic atomizing unit 75 is disposed in the electrostatic atomizing device 70, and the electrostatic atomizing device 70 is mounted on the surface of the humidifying pipe 28 in the region AR 1. The electrostatic atomizing device 70 and the electrostatic atomizing unit 75 are disposed upstream of the heat exchanger 21.

As shown in fig. 4, 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 barrier 27. 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 barrier. The control device 81 is connected to an outdoor control board 82 (see fig. 4) disposed in the air conditioning outdoor unit 4. Here, the case where the control device 81 includes the timer 81a, the control computing device 81b, and the storage device 81c is described, but the timer 81a, the control computing device 81b, and the storage device 81c may be provided in other portions 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 panel 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 timing of turning on/off the electrostatic atomizing device 70 using the timer 81 a.

(2-1-1) humidifying pipe

As shown in fig. 7, 8, 9, and 10, the humidification duct 28 has a blowout opening 28a, a duct filter 28b, a wide portion 28c, a connection portion 28d, and an air supply opening 28e. The air supply/exhaust hose 68 is connected to the cylindrical connection portion 28 d. The external air flows in from the air supply opening 28e at the end of the connection portion 28d through the air supply and exhaust hose 68. A wide portion 28c that is wider in the longitudinal direction D1 (left-right direction) than the connecting portion 28D is disposed downstream of the connecting portion 28D. The duct filter 28b is attached to the wide portion 28c in a pluggable manner. The duct filter 28b can be pulled out from the casing 23 toward the front by opening the front panel 23p of the air conditioning indoor unit 2. In the wide portion 28c, a blowout opening 28a is formed downstream of the duct filter 28 b. The blowout opening 28a is opposed to the heat exchanger 21. In the air conditioning indoor unit 2 of the present embodiment, the air outlet opening 28a is arranged below the air filter 24, and the outside air blown out from the air outlet opening 28a flows into the heat exchanger 21 without passing through the air filter 24. Since the fan 22 generates a flow of air in a direction perpendicular to the longitudinal direction D1, the external air blown out from the humidifying pipe 28 to one end side of the casing 23 flows in the air supply flow path R1, and does not flow in the other flow paths R2.

A supply air humidity sensor 33 is mounted to the humidification duct 28. In the example shown in fig. 9, the supply air humidity sensor 33 is mounted to the blowout opening 28a. The supplied air humidity sensor 33 measures the relative humidity of the external air supplied from the humidifying pipe 28. The supplied air humidity sensor 33 is connected to the control device 81, and transmits data of the detected relative humidity of the outside air to the control device 81.

(2-1-2) Electrostatic atomizing device

As shown in fig. 11, the electrostatic atomizing unit 75 is disposed in the electrostatic atomizing device 70. The electrostatic atomizing device 70 includes, for example, a housing 71, a suction port 72a, a discharge port 72b, an air blower 74, and a high-voltage transformer 73. The electrostatic atomizing device 70 is mounted on the surface of the upper portion of the humidifying duct 28. Here, the case where the electrostatic atomizing device 70 is attached to the upper surface of the humidifying duct 28 is described as an example, but the attaching position of the humidifying duct 28 may be the rear surface of the humidifying duct 28 or may be a side surface. The discharge port 72b is disposed at an upper portion of the housing 71 of the electrostatic atomizer 70. Here, the suction port 72a is arranged on a surface of the housing 71 adjacent to the blowout opening 28a of the humidification duct 28. The suction port 72a is disposed at the rear of the housing 71, but may be disposed at other portions of the housing 71, for example, the end face in the longitudinal direction of the housing 71. The discharge port 72b of the electrostatic atomizing device 70 is disposed downstream of the air filter 24. The suction port 72a sucks air from the ventilation path FP of the housing 23. In order to discharge the air sucked from the suction port 72a from the discharge port 72b through the electrostatic atomizing unit 75 in the housing 71, the electrostatic atomizing device 70 is preferably provided with an air blower 74 in the housing 71. However, even if the blower 74 is not provided, the blower 74 may be omitted in the case where the airflow is generated in the housing 71.

As shown in fig. 12, the electrostatic atomizing unit 75 changes moisture condensed on the discharge electrode 78 into water particles 77 containing ions by discharge, and discharges the water particles. In order to generate a high-voltage discharge at the discharge electrode 78, a high voltage is applied between the discharge electrode 78 and the counter electrode 79 through the high-voltage transformer 73. Due to the discharge phenomenon generated in the discharge electrode 78, moisture on the discharge electrode 78 becomes nano-sized particles to be charged, and electrostatic mist is generated.

The electrostatic atomizing unit 75 includes, for example, a cooling element 76 for generating dew condensation water on the discharge electrode 78. The cooling element 76 has a cooling surface 76a and a cooling surface 76b. The heat dissipation surface 76a is thermally connected to, for example, a heat dissipation portion 76c. The heat dissipation portion 76c can be a fin, for example. The cooling surface 76b is thermally connected to the discharge electrode 78 via an electrical insulator (not shown). The discharge electrode 78 provided upright on the cooling surface 76b is disposed apart 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, heat is absorbed in the cooling surface 76b and heat is generated in the heat radiation surface 76a when a direct current is caused to flow through the peltier element, and therefore, the temperature of the discharge electrode 78 thermally connected to the cooling surface 76b is reduced. When the temperature of the discharge electrode 78 is lower than the dew point temperature of the air sucked from the suction port 72a, dew condensation occurs in the discharge electrode 78. By connecting the discharge electrode 78 to the negative electrode side of the high-voltage transformer 73 and connecting the counter electrode 79 to the positive electrode side of the high-voltage transformer 73, negative ions are generated in the water particles 77, and the electrostatic mist generated in the discharge electrode 78 is negatively charged.

(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, a gas-liquid separator 43, an outdoor heat exchanger 44, an outdoor expansion valve 45, an outdoor fan 46, and a casing 47. The compressor 41, the four-way valve 42, the gas-liquid separator 43, the outdoor heat exchanger 44, the outdoor expansion valve 45, and the outdoor fan 46 are housed in a casing 47. The case 47 has a rear opening 47a (see fig. 4) through which outside air is sucked and a front opening 47b (see fig. 1 and 4) through which heat-exchanged air is blown. The rear opening 47a is disposed at the rear side of the housing 47. The air conditioning outdoor unit 4 functions as a heat source unit that supplies heat energy to the air conditioning indoor unit 2.

The compressor 41 sucks in the gas refrigerant, compresses the gas refrigerant, and discharges the gas refrigerant. The compressor 41 is, for example, a variable capacity compressor capable of changing the operation capacity by adjusting the operation frequency of the motor 41m by an inverter. The greater the operating frequency, the greater 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 inlet and outlet of the outdoor heat exchanger 44. The third port P3 of the four-way valve 42 is connected to the gas-liquid separator 43. The fourth port P4 of the four-way valve 42 is connected to one inlet and outlet of the heat exchanger 21.

The gas-liquid separator 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 connects the other port to one port of the outdoor expansion valve 45. The outdoor heat exchanger 44 exchanges heat between the refrigerant flowing into the interior from one of the inlet and the outlet or the other inlet and the outside air. The outdoor expansion valve 45 connects the other inlet and outlet to the other inlet and outlet of the heat exchanger 21.

An outdoor control board 82 constituting the control unit 8 is disposed in the air conditioning outdoor unit 4. The outdoor control board 82 is connected to the control device 81. The outdoor control board 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 rotational speed of the motor 46m of the outdoor fan 46 by the outdoor control board 82.

The refrigerant circuit 13 includes a compressor 41, a four-way valve 42, a gas-liquid separator 43, an outdoor heat exchanger 44, an outdoor expansion valve 45, and the heat exchanger 21. The refrigerant circulates in the refrigerant circuit 13. Examples of the refrigerant include freons such as R32 refrigerant and R410 refrigerant, and carbon dioxide. In the vapor compression refrigeration cycle, the refrigerant is compressed by the compressor 41 to raise the temperature, and then the refrigerant radiates 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 gas-liquid separator 43, the refrigerant sucked into the compressor 41 is separated into gas and liquid. The four-way valve 42 switches the direction of the flow of the refrigerant in the refrigerant circuit 13.

(2-3) humidifier 6

The humidifier 6 of the present embodiment is integrated with the air conditioning outdoor unit 4. However, the humidifier 6 and the air conditioner outdoor unit 4 may be configured as separate units. The humidifier 6 takes in moisture from the outside air. The humidifier 6 can generate high-humidity air by giving the taken-in moisture to the outside air. The humidifier 6 sends the high humidity air to the air conditioning indoor unit 2. The air conditioning indoor unit 2 mixes the high humidity air sent from the humidifier 6 with the indoor air during the humidification operation. The air conditioning indoor unit 2 blows out air mixed with air having high humidity into the room RM (indoor), thereby humidifying the indoor space. The humidifier 6 is controlled by a control unit 8.

The humidifier 6 may stop the humidification operation and send the outside air to the air conditioning indoor unit 2 without humidification. The air conditioning indoor unit 2 mixes the outside air sent from the humidifier 6 with the indoor air during the ventilation operation. The air conditioning indoor unit 2 blows out air mixed with outside air into the room RM (indoor), and can supply the outside air into the room. The humidifier 6 may stop the humidification operation and discharge the indoor air from the air conditioning indoor unit 2 to the outdoor OD without humidification. In the ventilation operation, the air conditioning indoor unit 2 can supply outside air to the room RM or discharge indoor air in the room RM to the outdoor OD.

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 casing 69. The humidifier 6 includes a supply/discharge hose 68. As shown in fig. 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 includes an adsorption air outlet 69a, an adsorption air inlet 69b, and a humidification air inlet 69c in the housing 69.

The adsorption rotor 61 is, for example, a disk-shaped humidity control rotor having a honeycomb structure. The humidity control rotor can be formed by, for example, firing an adsorbent having a property of adsorbing moisture in the air in contact with the humidity control rotor. The adsorbent of the adsorption rotor 61 has a property of desorbing the adsorbed moisture by being heated. When unheated air passes through the adsorption rotor 61 of the honeycomb structure, moisture of the air is adsorbed to 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 given to the air. The suction rotor 61 is driven to rotate by a motor 61 m. The rotation speed of the suction rotor 61 can be changed by changing the rotation speed of the motor 61 m.

The heater 62 is disposed between the humidifying air intake port 69c and the switching damper 63. The outside air taken in from the humidifying air intake port 69c passes through the heater 62, and then further passes 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 released from the adsorption rotor 61, and the moisture is supplied from the adsorption rotor 61 to the heated outside air. The heater 62 can change the output, and the temperature of the air passing through the heater 62 can be changed according to the output. The adsorption rotor 61 has a tendency that the higher the temperature of the air passing through the adsorption rotor 61 is, the more moisture is separated in a specific temperature range. By changing the temperature of the heater 62 and the rotation speed of the adsorption rotor 61, the moisture content of the external air can be adjusted.

The switching damper 63 has a first inlet and outlet 63a and a second inlet and outlet 63b. The switching damper 63 can switch whether the inlet of the air sucked in when the air supply and exhaust fan 64 is driven is the first inlet 63a or the second inlet 63b. When the inlet of air is the first inlet/outlet 63a, the outside air flows from the humidifying air intake port 69c in the direction of the arrow shown by the solid line in fig. 4 in the order of the adsorption rotor 61, the heater 62, the adsorption rotor 61, the first inlet/outlet 63a, the air supply/discharge fan 64, the second inlet/outlet 63b, the duct 66, the air supply/discharge hose 68, and the air conditioning indoor unit 2. When the air inlet is switched to the second inlet 63b, conversely, in the direction of the arrow indicated by the broken line in fig. 4, the air flows from the air conditioning indoor unit 2 in the order of the supply/discharge hose 68, the duct 66, the second inlet 63b, the supply/discharge fan 64, the first inlet 63a, the adsorption rotor 61, the heater 62, the adsorption rotor 61, and the humidifying air intake 69 c. The switching of the switching damper 63 is performed by a motor 63 m.

The air supply and exhaust fan 64 is disposed between the first inlet and outlet 63a and the second inlet and outlet 63b of the switching damper 63. The air supply and exhaust fan 64 generates a flow of air from the first inlet and outlet 63a toward the second inlet and outlet 63b or from the second inlet and outlet 63b toward the first inlet and outlet 63 a. The supply and exhaust fan 64 is driven by a motor 64 m. One end of the air supply/exhaust hose 68 is connected to the duct 66, and the other end is connected to the air conditioning indoor unit 2. With such a structure, the supply and exhaust hose 68 communicates with the room RM via the air conditioning indoor unit 2.

The adsorption fan 65 is disposed in a passage extending from the adsorption air intake port 69b to the adsorption air discharge port 69a, and the adsorption rotor 61 is disposed so as to overlap the passage. When an air flow from the adsorption air intake port 69b toward the adsorption air discharge port 69a is generated by the adsorption fan 65, adsorption of moisture from the outside air passing through the adsorption rotor 61 toward the adsorption rotor 61 occurs. The suction fan 65 is driven by a motor 65 m.

The motor 61m of the suction rotor 61, the motor 63m of the switching damper 63, the motor 64m of the air supply and exhaust fan 64, and the heater 62 are connected to the outdoor control board 82. The control unit 8 can control the rotation speed of the suction rotor 61, the switching of the switching damper 63, the on/off of the supply/exhaust fan 64 and the suction fan 65, and the output of the heater 62 by the outdoor control board 82.

(3) Air conditioning system and operation of indoor unit of air conditioner

(3-1) summary

Examples of the operation modes of the air conditioning system 1 include a cooling operation, a heating operation, a dehumidifying operation, a humidifying operation, a blowing operation, a ventilation operation, and an air cleaning operation. In addition, a plurality of operations can be combined. For example, the heating operation and the humidification operation, the cooling operation and the humidification operation, the air blowing operation and the humidification operation, the ventilation operation and the cooling operation, the ventilation operation and the heating operation, the ventilation operation and the dehumidification operation, and the ventilation operation and the air blowing operation can be combined. In addition, the air purifying operation can be further combined with the humidifying operation, the heating operation and the humidifying operation, the cooling operation and the humidifying operation, and the air blowing operation and the humidifying operation.

(3-2) Cooling operation

Before the cooling operation is started, the cooling operation is instructed from a remote controller (not shown) to the control device 81 of the control unit 8, for example, and the target temperature is instructed. 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. In the cooling operation, the four-way valve 42 thus switched causes the refrigerant to flow between the first port P1 and the second port P2, and causes the refrigerant to flow between the third port P3 and the fourth port P4. The four-way valve 42 in the cooling operation causes the high-temperature and high-pressure gas refrigerant discharged from the compressor 41 to flow into the outdoor heat exchanger 44. In the outdoor heat exchanger 44, heat exchange is performed between the refrigerant and the outside air supplied from 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. 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 is only indoor air, or indoor air and outside air. The refrigerant heated by the heat exchange in the heat exchanger 21 is sucked into the compressor 41 through the four-way valve 42 and the gas-liquid separator 43. The indoor air cooled by the heat exchanger 21 or the mixed air of the indoor air and the outside air is blown out from the air conditioning indoor unit 2 into the room RM, thereby cooling the room. In the air conditioner 10, during the cooling operation, the heat exchanger 21 functions as an evaporator of the refrigerant to cool the room RM, and the outdoor heat exchanger 44 functions as a radiator of the refrigerant. The control unit 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 the heating operation is started, for example, the heating operation is instructed from the remote controller to the control device 81 of the control unit 8 and the target temperature is instructed. During the heating operation, the control unit 8 switches the four-way valve 42 to the state shown by the broken line in fig. 4. In the heating operation, the four-way valve 42 thus switched causes the refrigerant to flow between the first port P1 and the fourth port P4, and causes the refrigerant to flow between the second port P2 and the third port P3. The four-way valve 42 in the heating operation causes the high-temperature and high-pressure gas refrigerant discharged from the compressor 41 to flow into 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 is only indoor air, or indoor air and outside 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. In the outdoor heat exchanger 44, heat exchange is performed between the refrigerant and the outside air supplied from the outdoor fan 46. The refrigerant heated by the heat exchange in the outdoor heat exchanger 44 is sucked into the compressor 41 through the four-way valve 42 and the gas-liquid separator 43. The indoor air heated by the heat exchanger 21 or the mixed air of the indoor air and the outside air is blown out from the air conditioning indoor unit 2 into the room RM, and thereby the indoor heating is performed. In the air conditioner 10, during the heating operation, the heat exchanger 21 functions as a radiator of the refrigerant 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 that the temperature detected by the indoor temperature sensor 31 approaches the target temperature.

(3-4) air supply operation

Before the air blowing operation is started, for example, the air blowing operation is instructed from the remote controller to the control device 81 of the control unit 8. During the air 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 is caused to automatically select the target air volume. The control device 81 controls the motor 22m of the fan 22 so as to achieve a target air volume. For example, the control device 81 is configured to be able to increase the rotation speed in the order of L, M, and H wind levels from the LL wind level (tap) at which the rotation speed is the smallest. When the air blowing operation is being performed, the control unit 8 also stops the operation of the humidifier 6. In the air blowing operation, the indoor air in the room RM is circulated by the air conditioning indoor unit 2.

(3-5) humidifying operation

Before the humidification operation starts, the control device 81 of the control portion 8 is instructed to perform the humidification operation and to instruct the target humidity from the remote controller, for example. When the humidification operation is performed only by humidification, the control portion 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 simultaneously with the humidification operation.

When receiving the instruction of the humidification operation, the control unit 8 first causes the humidifier 6 to dry the supply/discharge hose 68. After the supply/exhaust hose 68 is dried, the control unit 8 starts the humidification operation of the humidifier 6. The control unit 8 controls the suction fan 65 to drive and the suction rotor 61 to rotate. The outside air passes through the adsorption rotor 61 by driving the adsorption fan 65, whereby moisture is adsorbed from the outside air to the adsorption rotor 61. By the rotation of the adsorption rotor 61, the portion where moisture is adsorbed moves to a place where air heated by the heater 62 passes. As a result, moisture is released from the portion where the moisture is adsorbed toward the heated air. The air having passed through the adsorption rotor 61 and having a high humidity is sent to the room RM via the air supply and exhaust hose 68 and the air conditioning indoor unit 2 by the air supply and exhaust fan 64. In the humidification operation, the control device 81 drives the fan 22 of the air conditioning indoor unit 2 so as to blow out the 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 conditioning indoor unit 2. Examples of the predetermined humidity sensor include an indoor humidity sensor 32 and a humidity sensor attached to the humidification duct 28.

(3-6) ventilating operation

Before the ventilation operation is started, the ventilation operation is instructed from the remote controller to the control device 81 of the control unit 8, for example. In 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, for example, in the case of cooling while ventilation and in the case of heating while ventilation, 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 control unit 8 controls the motor 64m to drive the supply and exhaust fan 64. In addition, in the ventilation operation, the control unit 8 controls the switching damper 63 to switch between the air supply state and the air discharge state. In the supplied air state, the outside air is taken in from the humidifying air intake port 69c, and blown out to the room RM through the supply/discharge hose 68 and the air conditioning indoor unit 2. In the discharge state, the indoor air is discharged from the room RM through the air conditioning indoor unit 2 and the air supply/discharge hose 68 from the humidifying air intake port 69 c. In the ventilation operation, the control device 81 drives the fan 22 of the air conditioning indoor unit 2 so as to blow out outside air into the room RM. In the ventilation operation, the humidification duct 28 functions as an air supply duct that directly supplies the outside air that is not humidified by the humidifier 6.

(3-7) air purification operation

The air conditioning system 1 can perform an air cleaning operation using the electrostatic atomizing device 70. The air cleaning operation is an operation for suppressing harmful components and/or odor components in the air. The air cleaning operation is an operation for suppressing a harmful component or an odor component by using, for example, ion-containing water particles (electrostatic mist) generated by the electrostatic atomizing device 70. The air cleaning operation using the electrostatic atomizing device 70 is performed together with the humidification operation or the ventilation operation.

(3-7-1) cases where the air-purifying operation and the humidifying operation are performed

The control device 81 of the air conditioning indoor unit 2 controls the electrostatic atomizing device 70 so as to operate the electrostatic atomizing unit 75 when outside air is introduced into the room RM (indoor) during the humidification operation. The control device 81 controls the electrostatic atomizing device 70, for example, in accordance with the flow chart shown in fig. 13. 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 atomizing unit 75 can be operated (step ST 1). For example, when the instructed operation mode is a mode in which humidification operation and air purification operation are performed (yes in step ST 1), it is determined whether humidification is being performed by the humidifier 6 (step ST 2). Since the control device 81 of the control unit 8 is connected to the outdoor control board 82 of the control unit 8 that controls the humidifier 6, information related to humidification of the humidifier 6 can be received from the outdoor control board 82. When humidification is being performed by the humidifier 6 (yes in step ST 2), the control device 81 controls the electrostatic atomizing unit 75 to discharge (step ST 3). When humidification is not performed by the humidifier 6 (no in step ST 2), the control device 81 controls the electrostatic atomizing unit 75 so as not to discharge electricity (step ST 4).

It is determined whether or not the operation mode is changed when the air cleaning operation and the humidification operation are being performed (step ST 5). When the operation mode is changed (yes in step ST 5), a determination is returned to whether or not the changed operation mode is an operation mode in which the electrostatic atomizing unit 75 can be operated (step ST 1). When it is determined that there is no change in the operation mode (no in step ST 5), it is determined whether or not there is an instruction to end the operation (step ST 6). If there is no instruction to end the operation (no in step ST 6), the flow returns to the first step (step ST 1). When the operation is instructed to be completed (yes in step ST 6), the control flow shown in fig. 13 is completed.

(3-7-2) air supply conditions in which the air cleaning operation and the ventilation operation are performed

The control device 81 of the air conditioning indoor unit 2 controls the electrostatic atomizing device 70 so that the electrostatic atomizing unit 75 operates when external air is introduced into the room RM (room) during air supply in the ventilation operation. At this time, the control device 81 controls the electrostatic atomizing device 70 in accordance with 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 atomizing unit 75 can be operated (step ST 1). 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 ST 1), it is determined whether or not the air supply of the ventilation operation is being performed by the humidifier 6 (step ST 2). Since the control device 81 of the control unit 8 is connected to the outdoor control board 82 of the control unit 8 that controls the humidifier 6, information on the supply air of the humidifier 6 can be received from the outdoor control board 82. When humidification is being performed by the humidifier 6 (yes in step ST 2), the control device 81 controls the electrostatic atomizing unit 75 to discharge (step ST 3). When humidification is not performed by the humidifier 6 (no in step ST 2), the control device 81 controls the electrostatic atomizing unit 75 so as not to discharge electricity (step ST 4). Steps after step ST3 and step ST4 are the same as the flow shown in fig. 13, and therefore, the description thereof is omitted.

(4) Modification examples

(4-1) modification A

In the above embodiment, the case where the electrostatic atomizing device 70 is mounted on the surface of the humidifying duct 28 has been described, but the electrostatic atomizing device 70 may be mounted separately from the humidifying 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 atomizing device 70 may be disposed between the outlet opening 28a of the humidification duct 28 and the heat exchanger 21. By adopting such a structure, the electrostatic atomizing device 70 and the electrostatic atomizing unit 75 are arranged downstream of the blowout opening 28a of the humidifying duct 28. As shown in fig. 15, when the electrostatic atomizing device 70 and the electrostatic atomizing unit 75 are disposed downstream of the blowout opening 28a of the humidification duct 28, the duct filter 28b is preferably disposed in the vicinity of the blowout opening 28a of the humidification duct 28. The electrostatic atomizing device 70 may be mounted in parallel with the humidification duct 28 separately from the humidification duct 28.

(4-2) modification B

In the above embodiment, the case where the electrostatic atomizing unit 75 is disposed in the vicinity of the blowout opening 28a of the humidification duct 28 that is the outlet of the air supply member is described. However, as shown in fig. 16, the electrostatic atomizing unit 75 may be disposed in the bypass path R3 of the humidification duct 28 as the air supply member. The frame 71 of the electrostatic atomizing device 70 is disposed apart from the wide portion 28c of the humidification duct 28 and in parallel. The frame 71 communicates with the wide portion 28c via a cylindrical body that serves as the suction port 72a of the electrostatic atomizing device 70. The suction port 72a is provided downstream of a duct filter (not shown in fig. 15). The discharge port 72b is provided separately from the blow-out opening 28a of the humidification duct 28. The air is blown out from the outlet 72b as well as the air is blown out from the air outlet 28 a. Therefore, in the electrostatic atomizing device 70 shown in fig. 16, the blower 74 is not provided. Although the description of the pipe filter is omitted in fig. 16, in the embodiment of the humidifying pipe 28 shown in fig. 16, the pipe filter is also disposed upstream of the electrostatic atomizing device 70 and the electrostatic atomizing unit 75.

(4-3) modification C

In the above embodiment, the case where the electrostatic atomizing unit 75 is disposed in the vicinity of the blowout opening 28a of the humidification duct 28 that is the outlet of the air supply member is described. However, as shown IN fig. 17 and 18, the electrostatic atomizing unit 75 may be disposed IN the internal space IN1 of the humidification duct 28 as the air supply member. The internal space IN1 is a space IN the wide portion 28c of the humidifying duct 28. The electrostatic atomizing unit 75 is directly disposed IN the internal space IN1 without the housing 71, and the blower 74 is omitted. Since the air flow is generated in the humidification duct 28, the housing 71 and the blower 74 are omitted, and the electrostatic atomizing unit 75 functions as an electrostatic atomizing device even if it is directly mounted in the humidification duct 28. In fig. 17 and 18, the high-voltage transformer 73 is not shown, but the high-voltage transformer 73 is preferably disposed outside the humidifying pipe 28. The electrostatic atomizing unit 75 is disposed downstream of the pipe filter 28 b. The water particles discharged from the electrostatic atomizing unit 75 are discharged from the blow-out opening 28a of the humidifying duct 28 into the housing 23. In order not to reduce the number of water particles, it is preferable to discharge water particles from downstream of the air filter 24. As shown IN fig. 17 and 18, the supply air humidity sensor 33 may be disposed IN the internal space IN1 of the humidification duct 28, or may be disposed IN a flow path IN the connection portion 28 d.

(4-4) modification D

In the above embodiment, the case where the humidifying pipe 28 is used as the air supply member is described. However, the air supply means is not limited to the humidifying duct 28. For example, instead of the humidifier 6, an air supply/discharge device that supplies and discharges only the outside air without a humidification function may be provided outdoors. When the air supply and exhaust device is provided, the air supply duct is disposed in the casing 23 instead of the humidification duct 28. In the case of such a configuration, the air conditioning indoor unit 2 cannot perform the humidification operation, but can perform the ventilation operation, and supply the outside air to the room RM (room). The arrangement relationship between the air supply duct and the electrostatic atomizing unit 75 can be set in the same manner as the arrangement relationship between the humidification duct 28 and the electrostatic atomizing unit 75.

(4-5) modification E

In the above embodiment, the case where the electrostatic atomizing device 70 is attached to the surface of the humidifying duct 28 has been described, but the electrostatic atomizing device 70 may be attached so as to cover the blowout opening 28a of the humidifying duct 28. For example, as shown in fig. 19, when the blowout opening 28a of the humidification duct 28 faces the heat exchanger 21, the electrostatic atomizing device 70 may be disposed between the blowout opening 28a of the humidification duct 28 and the heat exchanger 21 at a position covering the blowout opening 28 a. By adopting such a structure, the electrostatic atomizing device 70 and the electrostatic atomizing unit 75 are arranged downstream of the blowout opening 28a of the humidifying duct 28.

The electrostatic atomizing device 70 may be attached so as to cover the blowout opening 28a of the humidification duct 28 shown in fig. 16 to 18. When the electrostatic atomizing device 70 is attached to a position covering the blowout opening 28a shown in fig. 16 to 18, the humidifying duct 28 and the electrostatic atomizing device 70 are adjacently arranged along the longitudinal direction D1 of the housing 23.

In the case where the electrostatic atomizing device 70 is attached so as to cover the blowout opening 28a, the air flow generated in the humidifying duct 28 can be used to generate the air flow in the electrostatic atomizing device 70, and therefore the air blowing device 74 can be omitted. In addition, the pipe filter 28b is preferably disposed upstream of the electrostatic atomizing device 70. For example, the duct filter 28b may be attached to the blowout opening 28a.

(4-6) modification F

In the above embodiment, as described with reference to fig. 13, the control device 81 is controlled so that the discharge (operation) of the electrostatic atomizing unit 75 is performed while the humidifier 6 is humidifying. However, in the case of performing the humidification operation and the air cleaning operation, the period during which the control device 81 controls the discharge (operation) of the electrostatic atomizing unit 75 may be within a predetermined time from the end of the humidification of the room RM by the humidifier 6. The information of the predetermined time is stored in the storage device 81c, for example. When the control device 81 counts a predetermined time, for example, the predetermined time read from the storage device 81c is counted by a timer 81 a. Since the state in which the humidity in the housing 23 is high continues for a while after the humidification of the humidifier 6 is completed, for example, the electrostatic atomizing unit 75 may be operated to perform discharge for a period of several minutes after the completion of the humidification operation. In such control, for example, as shown in fig. 20, the determination of whether or not humidification is being performed in step ST2 of fig. 13 may be replaced with a determination of whether or not the time is within a predetermined time from the end of humidification (step ST 12). Since the control device 81 of the control unit 8 is connected to the outdoor control board 82 of the control unit 8 that controls the humidifier 6, information related to humidification of the humidifier 6 can be received from the outdoor control board 82. After the humidifier 6 finishes humidification, the controller 81 counts a predetermined time by the timer 81 a. The steps other than step ST12 in fig. 20 are the same as the steps other than step ST2 in fig. 13, and therefore, the explanation is omitted.

(4-7) modification G

In the above embodiment, the case where the control device 81 controls the electrostatic atomizing unit 75 to discharge (operate) while humidification is being performed by the humidifier 6 is described (see fig. 13). However, in the case of performing the ventilation operation and the air cleaning operation, the period during which the control device 81 controls to discharge (operate) the electrostatic atomizing unit 75 may be within a predetermined time from the end of the supply of air to the room RM by the humidifier 6. Since the state in which the humidity in the housing 23 is high may continue for a while even after the air supply of the humidifier 6 is completed, for example, the electrostatic atomizing unit 75 may be operated to discharge the air for a period of several minutes after the air supply of the ventilation operation is completed. In such control, for example, as shown in fig. 21, the determination of whether humidification is being performed in step ST2 of fig. 13 may be replaced with a determination of whether or not the time is within a predetermined time from the end of air supply (step ST 32). Since the control device 81 of the control unit 8 is connected to the outdoor control board 82 of the control unit 8 that controls the humidifier 6, information on the supply air of the humidifier 6 can be received from the outdoor control board 82. After the humidifier 6 finishes supplying air, the controller 81 counts a predetermined time by a timer 81 a. In addition, when the electrostatic atomizing unit 75 is operated, the control unit 8 does not perform the exhaust after the air supply. The steps other than step ST32 in fig. 21 are the same as the steps other than step ST2 in fig. 13, and therefore, the explanation is omitted.

(4-8) modification H

In the above embodiment, the determination as to whether or not to discharge the electrostatic atomizing unit 75 is not performed using the measurement result of the air supply humidity sensor 33. However, the measurement result of the air supply humidity sensor 33 may be used in the determination of whether or not to perform the discharge of the electrostatic atomizing unit 75. Instead of determining whether or not humidification or air supply is performed, it may be determined whether or not air supply is performed with a relative humidity equal to or higher than a predetermined value, for example, using the measurement result of the air supply humidity sensor 33. Further, the determination may be made not only based on whether or not the determination is made within a predetermined time period from the end of the supply of the external air into the room, but also based on whether or not the determination is made within a predetermined time period from the end of the supply of the air with the relative humidity equal to or higher than a predetermined value, using the measurement result of the supply air humidity sensor 33, for example.

(5) Features (e.g. a character)

(5-1)

In the air conditioning indoor unit 2, a humidification duct 28 or an air supply duct as an air supply means is disposed in the casing 23. The air supply duct is, for example, a duct for supplying outside air which is not humidified during ventilation operation. The humidification duct 28 when the humidifier 6 stops humidification and air supply is being performed can be regarded as an air supply duct. The room RM, which is the indoor space, is supplied with outside air, which is air outside the room OD, from the humidification duct 28 or the air supply duct. The electrostatic atomizing unit 75 is disposed IN the interior space IN1 of the humidification duct 28, the bypass path R3 of the humidification duct 28, or IN the vicinity of the blowout opening 28a of the humidification duct 28. The internal space IN1 of the humidification duct 28 is an example of the internal space of the air supply member. As another example of the internal space of the air supply member, there is an internal space of an air supply duct for supplying external air which is not humidified. The bypass path R3 of the humidification duct 28 is an example of a bypass path of the air supply member. As another example of the bypass path of the air supply member, there is the bypass path of the air supply duct described above. The blowout opening 28a of the humidification duct 28 is an example of an outlet of the air supply member. As another example of the outlet of the air supply member, there is the outlet of the aforementioned air supply duct. With such a configuration, moisture contained in the outside air is easily condensed in the electrostatic atomizing unit 75, and the generation efficiency of the ion-containing water particles is improved.

(5-2)

The electrostatic atomizing unit 75 is disposed at a position within 100mm from the blowout opening 28a of the humidification duct 28. Or at a position within 100mm from the outlet of the air supply duct. By disposing in the vicinity of the outlet of the air supply duct or the air outlet opening 28a in this manner, the air containing a large amount of external air blown out from the outlet of the air supply member can be guided to the electrostatic atomizing unit 75. As a result, condensation is likely to occur in the electrostatic atomizing unit 75.

(5-3)

Since the electrostatic atomizing unit 75 is disposed upstream of the heat exchanger 21, the outside air before passing through the heat exchanger 21 can be taken into the electrostatic atomizing unit 75. As a result, the absolute humidity of the air taken into the electrostatic atomizing unit 75 can be prevented from decreasing.

(5-4)

The humidification duct 28 of the air conditioning indoor unit 2 described above functions as a flow path for supplying humidified outside air, and therefore, the humidity of air taken into the electrostatic atomizing unit 75 when the outside air is dry can be increased.

(5-5)

In the case of a configuration in which the control device 81 causes the electrostatic atomizing unit 75 to operate when the external air is being supplied into the room, the external air can be taken into the electrostatic atomizing unit 75 when the electrostatic atomizing unit 75 is operating. In this way, by taking in the outside air to the electrostatic atomizing unit 75, it is easy to maintain high generation efficiency of the water particles.

(5-6)

As described with reference to fig. 20, when the control device 81 operates the electrostatic atomizing unit 75 within a predetermined time from the end of the supply of the external air into the room, the air containing a large amount of external air is easily taken into the electrostatic atomizing unit 75. The efficiency of generating water particles can be improved by taking in air containing a large amount of outside air by the electrostatic atomizing unit 75.

(5-7)

The air conditioning indoor unit 2 includes a duct filter 28b, and the duct filter 28b is a supply air filter through which the outside air taken into the electrostatic atomizing unit 75 passes. In the air conditioning indoor unit 2 provided with the duct filter 28b, the air supply filter can prevent particles such as pollen from being mixed with the outside air and taken into the electrostatic atomizing unit 75. The air conditioning indoor unit 2 provided with the duct filter 28b can suppress occurrence of an abnormality in discharge due to particulates.

(5-8)

When the electrostatic atomizing unit 75 is disposed downstream of the outlet of the air supply duct or the outlet opening 28a of the humidification duct 28, as shown in fig. 15, the duct filter 28b may be disposed in the vicinity of the outlet of the air supply duct or the outlet opening 28a of the humidification duct 28. In this case, the duct filter 28b can be miniaturized, and the efficiency of air conditioning can be prevented from being lowered by the duct filter 28 b.

While the embodiments of the present disclosure have been described above, it should be understood that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as set forth in the following claims.

Description of the reference numerals

2 air conditioner indoor unit

21 heat exchanger

23 outer casing

28 humidification pipe (example of air supply component)

28b pipeline filter (example of air supply filter)

75 electrostatic atomizing unit

81 control device

IN1 interior space

R3 bypass path

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2014-20578

Claims

1. An air conditioner indoor unit (2) for performing indoor air conditioning, wherein,

the indoor unit (2) of an air conditioner is provided with:

a housing (23);

an air supply member (28) disposed in the housing and configured to supply outside air, i.e., outside air, into the room; and

an electrostatic atomizing unit (75) disposed in the housing and configured to discharge liquid particles containing ions generated by discharge,

the electrostatic atomizing unit is disposed in an internal space of the air supply member, a bypass path of the air supply member, or in the vicinity of an outlet of the air supply member.

2. The air conditioning indoor unit (2) according to claim 1, wherein,

The electrostatic atomizing unit is disposed at a position within 100mm from the outlet of the air supply member.

3. An air conditioning indoor unit (2) according to claim 1 or 2, wherein,

the air conditioning indoor unit (2) is provided with a heat exchanger (21), the heat exchanger (21) is arranged in the housing and exchanges heat between indoor air and the outside air and a heat medium,

the electrostatic atomizing unit is disposed upstream of the heat exchanger.

4. An air conditioning indoor unit (2) according to any of claims 1 to 3, wherein,

the air supply means is a humidifying duct (28) for supplying the humidified external air.

5. An air conditioning indoor unit (2) according to any of claims 1 to 4, wherein,

the air conditioning indoor unit (2) is provided with a control device (81) for controlling the electrostatic atomization unit,

the control device operates the electrostatic atomizing unit when the outside air is supplied into the chamber.

6. An air conditioning indoor unit (2) according to any of claims 1 to 4, wherein,

the control device operates the electrostatic atomizing unit within a predetermined time from the end of the supply of the external air into the chamber.

7. An air conditioning indoor unit (2) according to any of claims 1 to 6, wherein,

the air conditioning indoor unit (2) is provided with a supply air filter (28 b) through which the outside air taken into the electrostatic atomization unit passes.

8. The air conditioning indoor unit (2) according to claim 7, wherein,

the electrostatic atomizing unit is disposed downstream of the outlet of the air supply member,

the air supply filter is disposed near the outlet of the air supply part.