CN114341557B - Air conditioning system - Google Patents

Air conditioning system Download PDF

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Publication number
CN114341557B
CN114341557B CN202080061079.2A CN202080061079A CN114341557B CN 114341557 B CN114341557 B CN 114341557B CN 202080061079 A CN202080061079 A CN 202080061079A CN 114341557 B CN114341557 B CN 114341557B
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China
Prior art keywords
air
indoor
humidifier
control unit
heat exchanger
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CN202080061079.2A
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Chinese (zh)
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CN114341557A (en
Inventor
鹈饲康史
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Daikin Industries Ltd
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Daikin Industries Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0087—Indoor units, e.g. fan coil units with humidification means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/48—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring prior to normal operation, e.g. pre-heating or pre-cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F24F6/08—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using heated wet elements

Abstract

In an air conditioning system in which a humidifier humidifying a room using a hose humidifies the room and then cleans an indoor heat exchanger, the time until cleaning is started is shortened. The humidifier (6) has an air intake/exhaust hose (68) that communicates with the interior of the room, and air to which moisture has been added is transported by the air intake/exhaust hose (68) to perform humidification. In the normal mode, the control unit (8) controls the humidifier (6) as follows: the 1 st drying operation of drying the air suction/exhaust hose (68) before starting to convey the air to which moisture is added. In the cleaning mode, the control unit (8) controls the humidifier (6) as follows: the conveyance of the air to which moisture has been applied is started without performing an operation of drying the air intake/exhaust hose (68), or the air intake/exhaust hose (68) is dried before the conveyance of the air to which moisture has been applied is started by a 2 nd drying operation having an operation time shorter than that of the 1 st drying operation.

Description

Air conditioning system
Technical Field
An air conditioning system having a cleaning mode for cleaning an indoor heat exchanger.
Background
Conventionally, a humidification unit that humidifies a room is sometimes disposed outdoors. For example, a humidifying unit described in patent document 1 (japanese patent application laid-open No. 2018-71905) is disposed outdoors and includes a hose that passes through a wall around an indoor space and communicates with the outside and the inside of the room. The humidifying unit of patent document 1 dries the hose before humidification to prevent dew condensation water from accumulating in the hose and generating abnormal noise.
Disclosure of Invention
Problems to be solved by the invention
However, in the humidification unit of patent document 1, although the generation of abnormal noise in the hose can be reduced by drying the hose, the operation time taken for drying is delayed when the indoor humidity reaches the target humidity by humidification. Therefore, after humidifying the indoor space using the humidifying unit of patent document 1, when the indoor heat exchanger of the indoor unit of the air conditioner is to be cleaned, the start of the cleaning operation is delayed.
In an air conditioning system in which a humidifier that humidifies a room using a hose humidifies the room and then cleans an indoor heat exchanger, there is a problem in that the time until cleaning is started is shortened.
Means for solving the problems
The air conditioning system according to claim 1 includes an air conditioning indoor unit, a humidifier, and a control unit. The indoor unit of an air conditioner has an indoor heat exchanger, and performs heat exchange of indoor air by passing the indoor air through the indoor heat exchanger. The humidifier has a hose communicating with the room, and humidifies the air supplied with moisture by transporting the air through the hose. The control unit controls the air conditioning indoor unit and the humidifier so that the air conditioning indoor unit performs air conditioning in the normal mode and the cleaning operation for cleaning the indoor heat exchanger after humidification is performed in the cleaning mode. In the normal mode, the control unit controls the humidifier as follows: the first drying operation 1 of drying the hose before starting to convey the air to which moisture has been added. The control unit controls the humidifier in the washing mode as follows: the method includes starting to convey the air to which moisture is added without performing an operation of drying the hose, or drying the hose before starting to convey the air to which moisture is added by a 2 nd drying operation having an operation time shorter than that of the 1 st drying operation.
The air conditioning system according to aspect 1 can start the cleaning operation early by shortening the time corresponding to the operation time of the 1 st drying operation when the conveyance of the air to which moisture has been added is started without performing the operation of drying the hose. In addition, when the air conditioning system dries the hose before the conveyance of the air to which moisture has been added is started by the 2 nd drying operation, the cleaning operation can be started at an early stage by shortening the operation time of the 2 nd drying operation by an amount shorter than that of the 1 st drying operation.
In the air conditioning system according to claim 2, the control unit controls the humidifier in the purge mode as follows: and a 3 rd drying operation for drying the hose after the cleaning operation of the indoor heat exchanger is performed.
The air conditioning system according to aspect 2 can ensure a good condition of the hose after the cleaning operation by drying the hose in the 3 rd drying operation after the cleaning operation.
An air conditioning system according to claim 3 is the air conditioning system according to claim 2, wherein the humidifier has a heater, and the control unit controls the humidifier in the 3 rd drying operation as follows: the function of supplying moisture to the air is stopped, and the air heated by the heater is passed through the hose.
The air conditioning system according to aspect 3 can dry the hose using the heater of the humidifier, and can suppress the addition of equipment.
An air conditioning system according to claim 4 is the air conditioning system according to any one of claims 1 to 3, wherein the humidifier includes an adsorbing member that adsorbs moisture in the outside air, and the moisture adsorbed from the outside air by the adsorbing member is applied to the air sent into the room by the hose.
In the air conditioning system according to aspect 4, in the cleaning mode, the moisture supply operation by the adsorption member can be omitted, and the labor and time for cleaning can be saved.
An air conditioning system according to claim 5 is the air conditioning system according to any one of claims 1 to 4, wherein the control unit controls the air conditioning indoor unit in the cleaning mode as follows: after controlling the humidifier to perform humidification, a cleaning operation is performed in which dew condensation water is generated on the surface of the indoor heat exchanger and the surface is cleaned by the dew condensation water.
In the air conditioning system according to aspect 5, even when the indoor is dried under meteorological conditions or the like and a situation where cleaning of the indoor heat exchanger is not facilitated occurs, the humidity in the room can be increased by humidification in the cleaning mode, and the cleaning operation can be performed with sufficient dew condensation water.
Drawings
Fig. 1 is a conceptual diagram illustrating an example of the configuration of an air conditioning system according to an embodiment.
Fig. 2 is a cross-sectional view showing an example of the structure of an air conditioning indoor unit of an air conditioning system.
Fig. 3 is a diagram for explaining a refrigerant circuit and an air flow path provided in the air conditioning system of fig. 1.
Fig. 4 is an exploded perspective view illustrating a configuration example of the outdoor unit of the air conditioner and the humidifier of fig. 1.
Fig. 5 is a block diagram for explaining the structure of the air conditioning system of fig. 1.
Fig. 6 is a diagram for explaining the operation of each device in the 1 st dehumidification operation, the 2 nd dehumidification operation, and the 3 rd dehumidification operation.
Fig. 7 is a flowchart for explaining the operation of the air conditioning system.
Fig. 8 is a timing chart for comparing the humidifying operation in the normal mode and the operation in the cleaning mode.
Fig. 9 is a flowchart showing an example of the operation of the control unit when automatically shifting to the cleaning mode.
Fig. 10 is a time chart for comparing the humidifying operation in the normal mode and the cleaning mode operation in the modified example.
Fig. 11 is a flowchart for explaining another example of the operation of the air conditioning system.
Detailed Description
(1) Brief description of the configuration of the air conditioning system 1
As shown in fig. 1, an air conditioning system 1 according to the embodiment includes an air conditioning indoor unit 2 and a humidifier 6. As shown in fig. 3 and 5, the air conditioning system 1 includes a control unit 8 that controls the air conditioning indoor unit 2. The indoor air conditioning unit 2 is installed in a room RM (see fig. 1), and performs air conditioning in the room RM (indoor). In the embodiment, a case where the air-conditioning indoor unit 2 is installed on the wall WL provided in the room RM will be described. However, the type of the air-conditioning indoor unit 2 is not limited to the type provided on the wall WL of the room RM. The indoor air conditioning unit 2 may be installed on the ceiling CE or the floor FL, for example.
As shown in fig. 2, the indoor air conditioning unit 2 includes an indoor heat exchanger 21. The indoor air conditioning unit 2 causes indoor air (air in the room RM) to pass through the indoor heat exchanger 21, thereby performing heat exchange of the indoor air. The indoor heat exchanger 21 has a plurality of heat transfer fins 21a and a plurality of heat transfer tubes 21b. The indoor air passes between the plurality of heat transfer fins 21a. In addition, at the time of heat exchange, the refrigerant flows in the heat transfer tubes 21b while the air passes between the plurality of heat transfer fins 21a. The plurality of heat transfer tubes 21b are folded back to penetrate the 1 heat transfer fin 21a plurality of times.
The air conditioning system 1 includes a humidifier 6 shown in fig. 1 and 3 in addition to the air conditioning indoor unit 2. The humidifier 6 has a suction/discharge hose 68 communicating with the inside of the room. The humidifier 6 supplies moisture to the room RM (room) through the air intake/exhaust hose 68, and humidifies the room RM to increase the humidity therein.
As shown in fig. 3 and 5, 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 system 1 has a normal mode and a cleaning mode as operation modes. In the normal mode, the control unit 8 controls the air-conditioning indoor unit 2 so as to perform indoor air conditioning. In the normal mode, the control unit 8 controls the humidifier 6 as follows: the first drying operation 1 (see fig. 8) of drying the air intake/exhaust hose 68 before starting the conveyance of the air to which moisture has been added.
In the cleaning mode, the control unit 8 controls the indoor air conditioning unit 2 so that the indoor heat exchanger 21 is cleaned after humidification. Further, in the purge mode, the humidifier 6 is controlled to perform purging of the indoor heat exchanger 21. In the washing mode, the control unit 8 controls the humidifier 6 as follows: the moisture-added air starts to be conveyed without performing the operation of drying the air intake/exhaust hose 68. Alternatively, in the washing mode, the control unit 8 controls the humidifier 6 as follows: the suction/exhaust hose 68 is dried before the conveyance of the air to which moisture is applied is started in the 2 nd drying operation (see fig. 10) in which the operation time is shorter than that in the 1 st drying operation.
The control section 8 is realized by a microcomputer, for example. The control unit 8 includes, for example, a control arithmetic device 81b and a storage device 81c. The control arithmetic device 81b can use a processor such as a CPU or a GPU. The control arithmetic device 81b reads the program stored in the storage device 81c, and performs, for example, predetermined sequence processing and arithmetic processing in accordance with the program. Further, the control arithmetic device 81b can write the arithmetic result in the storage device 81c or read out the information stored in the storage device 81c according to the program. The storage device 81c can function as a database.
In the air conditioning system 1, when the conveyance of the air to which moisture has been applied is started without performing the operation of drying the air intake/exhaust hose 68, or when the air intake/exhaust hose 68 is dried before the conveyance of the air to which moisture has been applied is started by the 2 nd drying operation, the time can be shortened and the cleaning operation can be started early.
(2) Detailed structure
(2-1) Overall Structure
The indoor air-conditioning unit 2 is a part of the air-conditioning system 1 of the air-conditioning apparatus 10. The air conditioner 10 includes an outdoor unit 4 and a remote controller 15 shown in fig. 1 and 2, in addition to the indoor unit 2. The indoor unit 2 and the outdoor unit 4 are connected by refrigerant communication pipes 11 and 12. The indoor unit 2, the outdoor unit 4, and the refrigerant communication pipes 11 and 12 constitute a refrigerant circuit 13. The indoor air-conditioning unit 2 and the outdoor air-conditioning unit 4 are controlled by the control unit 8. 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.
(2-2) detailed construction
(2-2-1) indoor Unit 2 of air conditioner
As shown in fig. 2, 3, and 5, the indoor air conditioning unit 2 includes an indoor heat exchanger 21, an indoor fan 22, a casing 23, an air filter 24, a drain pan 26, a horizontal baffle plate 27, a vertical baffle plate (not shown), and a discharge unit 29. The indoor air conditioning unit 2 includes an indoor temperature sensor 31, an indoor humidity sensor 32, a duct temperature sensor 33, a duct humidity sensor 34, and an indoor heat exchanger temperature sensor 35.
In the following description, directions such as "up", "down", "front", and "rear" are sometimes used in accordance with directions indicated by arrows in fig. 1 and 2.
The casing 23 has an intake port 23a at the upper portion and an outlet port 23b at the lower portion. The indoor air conditioning unit 2 drives the indoor fan 22, sucks indoor air from the suction port 23a, and blows out air after passing through the indoor heat exchanger 21 from the discharge port 23b.
The indoor fan 22 is disposed in a substantially central portion of the casing 23 when viewed in cross section of the air conditioning indoor unit 2 (see fig. 2). The indoor fan 22 is, for example, a cross-flow fan. In the air flow path from the suction port 23a toward the discharge port 23b, the indoor heat exchanger 21 is disposed upstream of the indoor fan 22. The indoor heat exchanger 21 is shaped to open downward so as to cover the upper side of the indoor fan 22 as viewed in the direction in which the heat transfer pipe 21b extends. Such a shape is referred to herein as a substantially Λ shape. The indoor heat exchanger 21 includes a 1 st heat exchange portion 21F distant from the wall WL and a 2 nd heat exchange portion 21R close to the wall WL.
A drain pan 26 is disposed below the front lower portion and the rear lower portion of the indoor heat exchanger 21 having the substantially Λ shape. The condensation generated in the 1 st heat exchange unit 21F of the indoor heat exchanger 21 is received by the drain pan 26 disposed at the front lower portion of the indoor heat exchanger 21. The condensation generated in the 2 nd heat exchange unit 21R of the indoor heat exchanger 21 is received by the drain pan 26 disposed at the rear lower portion of the indoor heat exchanger 21.
The horizontal baffle 27 and the vertical baffle are disposed in the outlet 23b. The horizontal flap 27 changes the direction of the air blown out from the air outlet 23b vertically. Therefore, the horizontal flap 27 is configured to be capable of changing the angle with the horizontal direction by the motor 27 m. The vertical baffle is configured to be able to change the direction of the air blown out from the air outlet 23b in the left-right direction. The air conditioning system 1 drives the vertical baffle so that an angle formed with the front-rear direction is changed by a motor (not shown), for example.
An air filter 24 is disposed downstream of the suction port 23a and upstream of the indoor heat exchanger 21 in the casing 23. The air filter 24 is provided in the casing 23 so that substantially all of the indoor air supplied to the indoor heat exchanger 21 passes through the air filter 24. Therefore, dust larger than the mesh size of the air filter 24 is removed by the air filter 24, and therefore does not reach the indoor heat exchanger 21. However, the dust, oil mist, and the like smaller than the mesh size of the air filter 24 reach the indoor heat exchanger 21 through the air filter 24.
The discharge cell 29 is an active species generating device having a discharge portion therein. The discharge section includes, for example, a needle electrode and a counter electrode, and generates streamer discharge, which is one type of plasma discharge, by applying a high voltage. When an electric discharge occurs, active species having a high oxidative decomposition power are generated. These active species include, for example, high-speed electrons, ions, hydroxyl radicals, and excited oxygen molecules. The active species decompose harmful components and odor components in the air, which are composed of small organic molecules such as ammonia, aldehydes, and nitrogen oxides. The discharge unit 29 is disposed upstream of the air filter 24 or upstream of the indoor heat exchanger 21, for example.
The indoor control panel 81 constituting the control unit 8 is disposed in the air-conditioning indoor unit 2. As shown in fig. 5, the indoor control board 81 is connected to the motor 22m of the indoor fan 22, the motor 27m of the horizontal flap 27, and the electromagnetic valve 28. The control unit 8 can control the rotation speed of the motor 22m of the indoor fan 22, the rotation angle of the motor 27m of the horizontal flap, and the opening and closing of the electromagnetic valve 28 by the indoor control board 81. The indoor control board 81 includes a timer 81a, a control arithmetic device 81b, and a storage device 81c. The indoor control panel 81 is connected to an outdoor control panel 82 (see fig. 3 and 5) disposed in the air-conditioning outdoor unit 4. Here, although the case where the indoor control board 81 includes the timer 81a, the control arithmetic device 81b, and the storage device 81c is described, the timer 81a, the control arithmetic device 81b, and the storage device 81c may be provided in other parts of the control unit 8. For example, the timer 81a, the control arithmetic device 81b, and the storage device 81c may be provided in the outdoor control board 82.
The indoor control board 81 of the control unit 8 receives a signal from the remote controller 15 and receives an instruction input from the remote controller 15. The remote controller 15 has a display screen 15a. The control unit 8 can display various information on the display screen 15a of the remote controller 15. The control unit 8 can notify, for example, that the cleaning operation is not possible using the display screen 15a.
Fig. 3 and 5 show an indoor temperature sensor 31, an indoor humidity sensor 32, a duct temperature sensor 33, a duct humidity sensor 34, and an indoor heat exchanger temperature sensor 35, among the sensors provided in the air conditioning indoor unit 2. These sensors of the indoor unit 2 are connected to the indoor control panel 81. Therefore, the control unit 8 can detect the temperature of the air in the room by the indoor temperature sensor 31 and can detect the relative humidity of the air in the room by the indoor humidity sensor 32. The controller 8 can detect the temperature of the air blown out from the humidifier 6 to the air conditioning indoor unit 2 by the duct temperature sensor 33, and can detect the relative humidity of the air blown out from the humidifier 6 to the air conditioning indoor unit 2 by the duct humidity sensor 34. The control unit 8 can detect the temperature of the refrigerant flowing through a specific location of the indoor heat exchanger 21 by the indoor heat exchanger temperature sensor 35. The specific location is, for example, a portion where the heat transfer pipe 21b of the indoor heat exchanger temperature sensor 35 is attached.
As shown in fig. 3, the indoor heat exchanger 21 has an electromagnetic valve 28. The refrigerant flowing from the outdoor expansion valve 45 into the other inlet/outlet of the indoor heat exchanger 21 flows from the 1 st heat exchange unit 21F to the 2 nd heat exchange unit 21R through the solenoid valve 28. Conversely, the refrigerant flowing into one inlet and outlet of the indoor heat exchanger 21 from the 4 th port P4 of the four-way valve 42 flows from the 2 nd heat exchange unit 21R to the 1 st heat exchange unit 21F through the solenoid valve 28. The solenoid valve 28 is a valve for setting a differential pressure between the 1 st heat exchange unit 21F and the 2 nd heat exchange unit 21R. Here, although the case of using the solenoid valve 28 is described, for example, another control valve such as an electrically operated valve whose valve opening degree can be changed may be used. The solenoid valve 28 is set such that the opening degree is reduced in the activated state as compared with the closed state. In other words, in the activated state, the electromagnetic valve 28 increases the differential pressure between the 1 st heat exchanger 21F and the 2 nd heat exchanger 21R.
(2-2-2) outdoor unit 4 of air conditioner
As shown in fig. 3 and 5, the outdoor unit 4 of the air conditioner 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 casing 47 has an intake port 47a (see fig. 3) for taking in outdoor air and an outlet port 47b (see fig. 1 and 3) for blowing out heat-exchanged air. The suction port 47a is disposed on the rear side of the housing 47. The air-conditioning outdoor unit 4 functions as a heat source unit that supplies heat energy to the air-conditioning indoor unit 2.
The compressor 41 sucks in a gas refrigerant, compresses the refrigerant, and discharges the compressed refrigerant. The compressor 41 is, for example, a variable displacement compressor as follows: the operating capacity can be changed by adjusting the operating frequency of the motor 41m using the inverter. The larger the operating frequency, the larger the operating capacity of the compressor 41. The four-way valve 42 has 4 ports. The 1 st port P1 of the four-way valve 42 is connected to the discharge port of the compressor 41. A 2 nd port P2 of the four-way valve 42 is connected to one inlet/outlet of the outdoor heat exchanger 44. The 3 rd port P3 of the four-way valve 42 is connected to the gas-liquid separator 43. The 4 th port P4 of the four-way valve 42 is connected to one inlet/outlet of the indoor heat exchanger 21.
The gas-liquid separator 43 is connected between the 3 rd 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 flowing into the interior from one inlet/outlet or the other inlet/outlet and the outdoor air. The outdoor expansion valve 45 connects the other inlet/outlet to the other inlet/outlet of the indoor heat exchanger 21.
The outdoor control panel 82 constituting the control unit 8 is disposed in the air-conditioning outdoor unit 4. Outdoor control panel 82 is connected to indoor control panel 81. The outdoor control panel 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 controller 8 can control the operating frequency of the motor 41m of the compressor 41, the opening degree of the four-way valve 42, and the rotation speed of the motor 46m of the outdoor fan 46 by the outdoor control panel 82.
Fig. 3 and 5 show an outside air temperature sensor 51, a discharge pipe temperature sensor 52, and an outdoor heat exchanger temperature sensor 53, among the sensors provided in the outdoor unit 4. These sensors of the outdoor unit 4 are connected to the outdoor control panel 82. Therefore, the control unit 8 can detect the temperature of the outdoor air by the outdoor air temperature sensor 51. The control unit 8 can detect the temperature of the refrigerant flowing through the discharge pipe (the refrigerant pipe connected to the discharge port of the compressor 41) by the discharge pipe temperature sensor 52, and can detect the temperature of the refrigerant flowing through a specific location of the outdoor heat exchanger 44 by the outdoor heat exchanger temperature sensor 53. When controlling the refrigeration cycle, the controller 8 monitors the state of the refrigerant in the refrigerant circuit 13 using the discharge pipe temperature sensor 52, the outdoor heat exchanger temperature sensor 53, the indoor heat exchanger temperature sensor 35, and the like.
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 indoor heat exchanger 21. A refrigerant circulates in the refrigerant circuit 13. As the refrigerant, for example, freons such as R32 refrigerant and R410 refrigerant, carbon dioxide, and the like are available.
In the vapor compression refrigeration cycle, the refrigerant is compressed by the compressor 41 to increase the temperature, and then the refrigerant radiates heat in the outdoor heat exchanger 44 or the indoor heat exchanger 21. In the vapor compression refrigeration cycle, the refrigerant is decompressed and expanded in the outdoor expansion valve 45, and then absorbs heat in the indoor heat exchanger 21 or the outdoor heat exchanger 44. In the gas-liquid separator 43, the refrigerant sucked into the compressor 41 is subjected to gas-liquid separation. The four-way valve 42 switches the direction of the flow of the refrigerant in the refrigerant circuit 13.
(2-2-3) humidifier 6
The humidifier 6 of the embodiment is integrated with the outdoor unit 4 of the air conditioner. The humidifier 6 takes in moisture from outdoor air. The humidifier 6 generates high-humidity air by applying the taken-in moisture to outdoor air. The humidifier 6 sends the high-humidity air to the indoor air conditioning unit 2. In the air conditioning system 1, when humidification is performed, the air conditioning indoor unit 2 mixes the high-humidity air sent from the humidifier 6 with the indoor air. The indoor air conditioning unit 2 humidifies the room by blowing air mixed with high-humidity air into the room RM (indoor). The humidifier 6 is controlled by the control unit 8.
As shown in fig. 4, the humidifier 6 has an adsorption rotor 61, a heater 62, a switching damper 63, an air suction and exhaust fan 64, an adsorption fan 65, a duct 66, and a casing 69. Further, the humidifier 6 has a suction/discharge hose 68. As shown in fig. 1 and 4, the casing 69 of the humidifier 6 is integrally attached to the casing 47 of the outdoor unit 4. The humidifier 6 includes an air outlet 69a for adsorption, an air inlet 69b for adsorption, and an air inlet 69c for humidification in the casing 69.
The adsorption rotor 61 is, for example, a disk-shaped ceramic rotor having a honeycomb structure. The ceramic rotor can be formed by, for example, firing an adsorbent. The adsorbent has a property of adsorbing moisture in the air with which it is in contact. Further, the adsorbent has a property of releasing adsorbed moisture by being heated. Such adsorbents are, for example, zeolites, silica gels and aluminas. The adsorption rotor 61 is driven to rotate by a motor 61 m. By changing the rotation speed of the motor 61m, the rotation speed of the adsorption rotor 61 can be changed.
The heater 62 is disposed between the humidifying air intake port 69c and the switching damper 63. The outdoor air taken in from the humidification air intake port 69c passes through the heater 62, and then 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 desorbed from the adsorption rotor 61, and the heated air is supplied with moisture from the adsorption rotor 61. 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 the following tendency: in a specific temperature range, the higher the temperature of the air passing through the adsorption rotor 61 is, the more the amount of moisture is desorbed.
The switching damper 63 has a 1 st port 63a and a 2 nd port 63b. The switching damper 63 can switch between the 1 st inlet 63a and the 2 nd inlet 63b as the inlet of the air sucked when the air suction/discharge fan 64 is driven. When the air inlet is the 1 st inlet/outlet 63a, the outdoor air flows from the humidifying air intake 69c in the direction of the arrow shown by the solid line in fig. 3 in the order of the adsorption rotor 61, the heater 62, the adsorption rotor 61, the 1 st inlet/outlet 63a, the air suction/discharge fan 64, the 2 nd inlet/outlet 63b, the duct 66, the air suction/discharge hose 68, and the air conditioning indoor unit 2. When switching is performed so that the air inlet is the 2 nd inlet/outlet 63b, on the contrary, the air flows from the air conditioning indoor unit 2 in the direction of the arrow shown by the broken line in fig. 3 in the order of the air intake/exhaust hose 68, the duct 66, the 2 nd inlet/outlet 63b, the air intake/exhaust fan 64, the 1 st inlet/outlet 63a, the adsorption rotor 61, the heater 62, the adsorption rotor 61, and the humidification air intake port 69c. The switching of the switching damper 63 is performed by a motor 63 m.
The intake and exhaust fan 64 is disposed between the 1 st and 2 nd ports 63a and 63b of the switching damper 63. The air suction/discharge fan 64 generates a flow of air from the 1 st passageway 63a toward the 2 nd passageway 63b or a flow of air from the 2 nd passageway 63b toward the 1 st passageway 63 a. The suction/exhaust fan 64 is driven by a motor 64 m.
The suction/discharge hose 68 has one end connected to the duct 66 and the other end connected to the indoor unit 2. According to this structure, the suction/discharge hose 68 and the room RM communicate via the indoor unit 2.
The adsorption fan 65 is disposed in a passage continuous from the adsorption air intake port 69b to the adsorption air outlet port 69 a. In this passage, the suction rotor 61 is disposed so as to bridge the suction rotor 61. When the adsorption fan 65 generates an airflow from the adsorption air inlet 69b toward the adsorption air outlet 69a, adsorption of moisture from the outdoor air passing through the adsorption rotor 61 to the adsorption rotor 61 occurs. The adsorption 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 suction/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 adsorption rotor 61, the switching of the switching damper 63, the activation/deactivation of the suction/exhaust fan 64 and the adsorption fan 65, and the output of the heater 62 by the outdoor control panel 82. Fig. 3 and 5 show an outside air humidity sensor 71 among the sensors provided in the air conditioning indoor unit 2. The outside air humidity sensor 71 is connected to an outdoor control board 82. The control unit 8 can detect the relative humidity of the outdoor air by the outside air humidity sensor 71.
(2-3) operation of air-conditioning System 1
(2-3-1) operation in Normal mode
The normal mode operation of the air conditioning system 1 includes, for example, a cooling operation, a heating operation, a dehumidifying operation, a humidifying operation, an air blowing operation, a ventilating operation, and an air cleaning operation. Here, the operation in the normal mode is an operation other than the operation in the cleaning mode. The operation in the normal mode is not limited to the cooling operation, the heating operation, and the like. In the normal mode, a plurality of operations may be combined, such as a heating operation and a humidification operation.
(2-3-1-1) Cooling operation
Before the cooling operation is started, the cooling operation is instructed to the control unit 8 from the remote controller 15, 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. 3. During the cooling operation, the four-way valve 42 causes the refrigerant to flow between the 1 st port P1 and the 2 nd port P2, and causes the refrigerant to flow between the 3 rd port P3 and the 4 th 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 is exchanged between the refrigerant and outdoor air supplied by the outdoor fan 46. The refrigerant cooled in the outdoor heat exchanger 44 is decompressed in the outdoor expansion valve 45 and flows into the indoor heat exchanger 21. In the indoor heat exchanger 21, heat is exchanged between the refrigerant and the indoor air supplied by the indoor fan 22. The refrigerant heated by the heat exchange in the indoor heat exchanger 21 is drawn into the compressor 41 via the four-way valve 42 and the gas-liquid separator 43. The air in the room cooled in the indoor heat exchanger 21 is blown out from the indoor air conditioner 2 into the room RM, thereby cooling the room. In this air conditioner 10, during the cooling operation, the indoor heat exchanger 21 functions as an evaporator of the refrigerant, heats the indoor air in the room RM, and the outdoor heat exchanger 44 functions as a radiator of the refrigerant.
(2-3-1-2) heating operation
Before the heating operation is started, for example, the remote controller 15 instructs the control unit 8 of the heating operation and the target temperature. During the heating operation, the control unit 8 switches the four-way valve 42 to the state shown by the broken line in fig. 3. During the heating operation, the four-way valve 42 causes the refrigerant to flow between the 1 st port P1 and the 4 th port P4, and causes the refrigerant to flow between the 2 nd port P2 and the 3 rd port P3. The four-way valve 42 during the heating operation causes the high-temperature, high-pressure gas refrigerant discharged from the compressor 41 to flow into the indoor heat exchanger 21. In the indoor heat exchanger 21, heat exchange is performed between the refrigerant and the indoor air supplied by the indoor fan 22. The refrigerant cooled in the indoor heat exchanger 21 is decompressed in 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 indoor air supplied by the outdoor fan 46. The refrigerant heated by the heat exchange in the outdoor heat exchanger 44 is sucked into the compressor 41 via the four-way valve 42 and the gas-liquid separator 43. The indoor air heated in the indoor heat exchanger 21 is blown out from the indoor air conditioner 2 into the room RM, thereby heating the room. In this air conditioner 10, during the heating operation, the indoor heat exchanger 21 functions as a radiator for the refrigerant, heats the indoor air in the room RM, and the outdoor heat exchanger 44 functions as an evaporator for the refrigerant.
(2-3-1-3) dehumidification operation
Before the dehumidification operation is started, the dehumidification operation is instructed to the control unit 8 from the remote controller 15, for example. Here, a case where a plurality of modes can be selected in the dehumidification operation will be described. Information indicating which of the 1 st dehumidification mode, the 2 nd dehumidification mode and the 3 rd dehumidification mode is selected is transmitted from the remote controller 15 to the control unit 8. In the 1 st dehumidification mode, a 1 st dehumidification operation is performed in which substantially all of the indoor heat exchanger 21 is set to the evaporation region. In the 2 nd dehumidification mode, the 2 nd dehumidification operation is performed in which a part of the indoor heat exchanger 21 is set to the evaporation region and the remaining part of the indoor heat exchanger 21 is set to the superheated region. In the 3 rd dehumidification mode, the 3 rd dehumidification operation is performed in which the portion of the indoor heat exchanger 21 on the upstream side of the solenoid valve 28 is set as the condensation region and the portion on the downstream side of the solenoid valve 28 is set as the evaporation region.
During the dehumidification operation, the control unit 8 switches the four-way valve 42 to the state shown by the solid line in fig. 3. During the dehumidification operation, the four-way valve 42 causes the refrigerant to flow between the 1 st port P1 and the 2 nd port P2, and causes the refrigerant to flow between the 3 rd port P3 and the 4 th port P4. Therefore, in the refrigerant circuit 13, the direction of the refrigerant flow is the same between the dehumidification operation and the cooling operation. The refrigeration cycle is also performed in the refrigerant circuit 13 in the dehumidification operation.
(1 st dehumidification operation)
In the 1 st dehumidification operation, when the refrigerant circulates through the refrigerant circuit 13, the control unit 8 closes the electromagnetic valve 28 to adjust the operating frequency of the compressor 41 and the opening degree of the outdoor expansion valve 45. In the 1 st dehumidification operation, substantially all of the indoor heat exchanger 21 is set as the evaporation region. As a result, in the 1 st dehumidification operation, sensible heat capacity, which is the capacity for changing the indoor temperature, is increased.
Here, the substantial entirety of the indoor heat exchanger 21 is set as the evaporation region, and includes not only when the entirety of the indoor heat exchanger 21 is set as the evaporation region, but also when only a portion of the indoor heat exchanger 21 after a portion thereof is removed is set as the evaporation region. If only the part (for example, a part of 1/3 or less of the entire volume of the indoor heat exchanger 21) does not become the evaporation region, for example, if the part near the refrigerant outlet of the indoor heat exchanger 21 becomes the superheated region due to the indoor environment or the like, or the like.
(2 nd dehumidification operation)
In the 2 nd dehumidification operation, when the refrigerant circulates through the refrigerant circuit 13, the control unit 8 closes the electromagnetic valve 28 to adjust the operating frequency of the compressor 41 and the opening degree of the outdoor expansion valve 45. In the 2 nd dehumidification operation, a part of the 1 st heat exchange unit 21F is set to the evaporation region, while the remaining part of the 1 st heat exchange unit 21F and the 2 nd heat exchange unit 21R are set to the superheat region. In the 2 nd dehumidification operation, the controller 8 controls the compressor 41 and the outdoor expansion valve 45 so that the evaporation region becomes a predetermined volume (for example, 2/3 of the total volume of the indoor heat exchanger 21) or less. The evaporation temperature in the 2 nd dehumidification operation is lower than that in the 1 st dehumidification operation. At this time, the opening degree of the outdoor expansion valve 45 is normally smaller than the opening degree of the outdoor expansion valve 45 in the 1 st dehumidification operation. Since the sensible heat capacity is lower in the 2 nd dehumidification operation than in the 1 st dehumidification operation, when the heat load in the room is not low, the room temperature can be suppressed from decreasing and the room can be dehumidified.
(No. 3 dehumidification operation)
In the 3 rd dehumidification operation, when the refrigerant circulates through the refrigerant circuit 13, the control unit 8 activates the electromagnetic valve 28 to adjust the operating frequency of the compressor 41 and the opening degree of the outdoor expansion valve 45. In the 3 rd dehumidification operation, the valve opening degree is reduced by activating the electromagnetic valve 28 as compared with the 1 st dehumidification operation and the 2 nd dehumidification operation. In the 3 rd dehumidification operation, the 1 st heat exchange unit 21F is set to the condensation region, and the 2 nd heat exchange unit 21R is set to the evaporation region. The control unit 8 lowers the evaporation temperature in the 3 rd dehumidification operation to be lower than the evaporation temperature in the 2 nd dehumidification operation. At this time, the opening degree of the outdoor expansion valve 45 is fixed to an opening degree greater than the maximum opening degree of the outdoor expansion valve 45 in the 2 nd dehumidification operation. Since the sensible heat capacity is lower in the 3 rd dehumidification operation than in the 2 nd dehumidification operation, when the heat load in the room is low, the indoor dehumidification can be performed while suppressing a decrease in the room temperature.
(example of operating conditions for dehumidification operation)
Fig. 6 shows an example of the operation conditions of the 1 st dehumidification operation, the 2 nd dehumidification operation, and the 3 rd dehumidification operation. The controller 8 controls the outdoor fan 46 as follows: the control range of the rotation speed of the outdoor fan 46 in the 3 rd dehumidification operation is wider than the control range of the rotation speed of the outdoor fan 46 in the 2 nd dehumidification operation. The upper limit of the rotation speed of the outdoor fan 46 in the 3 rd dehumidification operation is higher than the upper limit of the rotation speed of the outdoor fan 46 in the 2 nd dehumidification operation. This can lower the evaporation temperature of the refrigerant during the 3 rd dehumidification operation than the evaporation temperature of the refrigerant during the 2 nd dehumidification operation. Therefore, when the indoor is dehumidified in the 3 rd dehumidification operation, the dehumidification efficiency can be improved. The upper limit of the rotation speed of the outdoor fan 46 during the 2 nd dehumidification operation is set to, for example, 840rpm. The upper limit of the rotation speed of the outdoor fan 46 during the 3 rd dehumidification operation is set to 970rpm, for example.
The lower limit of the rotation speed of the outdoor fan 46 during the 3 rd dehumidification operation is lower than the lower limit of the rotation speed of the outdoor fan 46 during the 2 nd dehumidification operation. Accordingly, during the 3 rd dehumidification operation, an excessive decrease in the pressure of the refrigerant between the outdoor heat exchanger 44 and the indoor heat exchanger 21 can be suppressed. Therefore, when dehumidifying the room in the 3 rd dehumidifying operation, the choke phenomenon can be suppressed. The lower limit of the rotation speed of the outdoor fan 46 during the 2 nd dehumidification operation is set to, for example, 510rpm. The lower limit of the rotation speed of the outdoor fan 46 during the 3 rd dehumidification operation is set to, for example, 150rpm.
The opening degree of the outdoor expansion valve 45 is adjusted by a pulse signal. The pulse number (pls) of the pulse signal is proportional to the opening degree of the outdoor expansion valve 45. As the number of pulses increases, the opening degree of the outdoor expansion valve 45 becomes larger.
(2-3-1-4) humidifying operation
Before the humidification operation is started, the humidification operation is instructed to the control unit 8 from the remote controller 15, for example, and the target humidity is instructed. In the humidification operation, the controller 8 stops the compressor 41 and stops the refrigeration cycle in the refrigerant circuit 13. However, in the humidification/heating operation, the refrigeration cycle in the refrigerant circuit 13 is performed simultaneously with the humidification operation.
Upon receiving the instruction of the humidification operation, the control unit 8 first controls the humidifier 6 as follows: the 1 st drying operation for drying the suction/exhaust hose 68 is performed. In the 1 st drying operation, the control unit 8 stops the adsorption fan 65 and the adsorption rotor 61. In the 1 st drying operation, the control unit 8 causes the heater 62 to heat air, switches the switching damper 63 so as to generate an air flow from the 1 st outlet/inlet 63a toward the 2 nd outlet/inlet 63b, and drives the air suction/discharge fan 64. The outdoor air taken in from the humidifying air intake port 69c is heated by the heater 62 to increase the temperature, thereby lowering the relative humidity. Since the adsorption rotor 61 is stopped, the supply of moisture to the air passing through the adsorption rotor 61 is not generated. The air dried in this way passes through the air intake/exhaust hose 68 by the air intake/exhaust fan 64, and the air intake/exhaust hose 68 is dried. The controller 8 counts the operation time by, for example, the timer 81a, and if the operation time reaches a predetermined time, the 1 st drying operation is terminated.
After the 1 st drying operation is finished, the humidifying operation is started. After the 1 st drying operation is completed, the control unit 8 controls the adsorption fan 65 to be driven and the adsorption rotor 61 to be rotated. The outdoor air passes through the adsorption rotor 61 by driving the adsorption fan 65, and thereby moisture is adsorbed from the outdoor air to the adsorption rotor 61. By the rotation of the adsorption rotor 61, the portion where the moisture is adsorbed moves to a place where the air heated by the heater 62 passes. As a result, moisture is desorbed from the portion where moisture is adsorbed toward the heated air. The air having the high humidity is sent to the room RM through the air intake/exhaust hose 68 and the indoor air conditioner 2 by the air intake/exhaust fan 64. The control unit 8 drives the indoor fan 22 of the indoor air conditioning unit 2 to blow out the high-humidity air into the room RM.
(2-3-1-5) air blowing operation
Before the air blowing operation is started, the air blowing operation is instructed to the control unit 8 from, for example, the remote controller 15. In the air blowing operation, the controller 8 stops the compressor 41 to stop the refrigeration cycle in the refrigerant circuit 13. During the blowing operation, there are a case where the target air volume is instructed from the remote controller 15 and a case where the air-conditioning indoor unit 2 is automatically selected to the target air volume. The control unit 8 controls the motor 22m of the indoor fan 22 so that the target air volume is achieved. For example, in the normal mode, the control unit 8 is configured to be able to increase the rotation speed in the order of L taps, M taps, and H taps from the LL tap (tap) at which the rotation speed is the smallest.
(2-3-1-6) Ventilation operation
Before starting the ventilation operation, the ventilation operation is instructed to the controller 8 from the remote controller 15, for example. During the ventilation operation, the controller 8 stops the compressor 41 and stops the refrigeration cycle in the refrigerant circuit 13. In addition, during the ventilation operation, the humidification operation is also stopped. Since the humidification operation is stopped, the rotation of the adsorption fan 65 and the adsorption rotor 61 is stopped. During the ventilation operation, the control unit 8 controls the motor 64m to drive the air intake/exhaust fan 64. Further, during the ventilation operation, the control unit 8 controls the switching damper 63 to switch the air supply state and the air discharge state. In the air supply state, outdoor air is taken in from the humidifying air intake port 69c and blown out into the room RM through the air intake/exhaust hose 68 and the indoor air conditioner 2. In the air discharge state, the air in the room RM is discharged from the humidifying air intake 69c through the air conditioning indoor unit 2 and the air intake/discharge hose 68.
(2-3-1-7) air cleaning operation
The air conditioning system 1 of the embodiment performs an air cleaning operation using the discharge unit 29. Here, 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 harmful components and/or odor components by utilizing the decomposition force of streamer discharge, for example.
(2-3-2) operation in cleaning mode
The operation in the cleaning mode will be described with reference to the flowchart of fig. 7. In the case of starting the washing mode, there are a case where the control unit 8 instructs to start the operation in the washing mode (a case of manual start) and a case where the control unit 8 automatically determines the start of the operation in the washing mode (a case of automatic start). The air conditioning system 1 of the embodiment corresponds to both the case of manual start and the case of automatic start. However, the air conditioning system 1 may be configured to correspond to either the case of manual start or the case of automatic start.
When the control unit 8 instructs the washing mode (step ST1: yes), the washing mode operation is started. As a case of the manual start, for example, a washing mode start button for instructing a washing mode of the remote controller 15 may be pressed. Further, even if there is no instruction for the washing mode (step ST1: NO), if the control unit 8 determines that the condition for starting the operation of the washing mode is satisfied (step ST2: YES), the operation of the washing mode is started. The conditions for transition to the cleaning mode in step ST2 will be described later.
After starting the operation in the cleaning mode, the controller 8 controls the motor 27m to open the horizontal flap 27 and fix it at a predetermined angle (step ST 3). The angle of the horizontal baffle 27 is preferably as follows: even if a person is located in the room RM, the air blown out from the air-conditioning indoor unit 2 does not directly contact the person. After starting the operation in the cleaning mode, the control unit 8 controls the discharge unit 29 to start streamer discharge (step ST 3). In addition, regarding the processing of step ST3, in the case where the horizontal shutter 27 has been opened, this state is maintained. In addition, in the process of step ST3, when streamer discharge has already been started, the state in which streamer discharge is being performed is maintained. The streamer discharge ends with the end of the operation in the cleaning mode. When streamer discharge is performed during the cleaning operation, the air conditioning system 1 can purify the indoor heat exchanger 21. However, the air conditioning system 1 may be configured to stop the discharge of the discharge unit 29 and perform the cleaning operation.
After the start of the operation in the cleaning mode, the control unit 8 determines whether the absolute humidity of the air in the room RM reaches a predetermined humidity (step ST 4). Not only when the absolute humidity value in the room is equal to the predetermined value AH1, but also when the absolute humidity value exceeds the predetermined value AH1, the control unit 8 determines that the absolute humidity value in the room has reached the predetermined value AH1.
In order to perform the determination in step ST4, the control unit 8 detects the temperature in the room by the room temperature sensor 31 and detects the relative humidity in the room by the room humidity sensor 32. The control unit 8 calculates the absolute humidity of the air in the room RM from the value MT of the temperature of the air detected by the indoor temperature sensor 31 and the value MRH of the relative humidity of the air detected by the indoor humidity sensor 32. Here, a case where the indoor humidity sensor 32 is a relative humidity sensor that detects relative humidity will be described. However, an absolute humidity sensor that detects absolute humidity may be used as the indoor humidity sensor included in the indoor unit 2, and the controller 8 may compare the value detected by the absolute humidity sensor with the predetermined value AH1.
When the absolute humidity in the room does not reach the predetermined value AH1 (no in step ST 4), the control unit 8 controls the humidifier 6 to supply water to the room RM.
In the case of this air conditioning system 1, 2 methods are set for supplying moisture by the humidifier 6. The control unit 8 selects an appropriate operation from the following 1 st humidification operation and 2 nd humidification operation.
The 1 st humidification operation is an operation in which humidification is performed simultaneously with heating. In the first humidification operation 1, the control unit 8 controls the air conditioner 10 and the humidifier 6 so that the heating operation of the air conditioner 10 for the room RM and the humidification operation of the humidifier 6 for the room RM are performed simultaneously.
The 2 nd humidification operation is an operation in which the heating operation in the 1 st humidification operation is stopped and only the humidification operation is performed. In the first humidification operation 1, the control unit 8 controls the air conditioner 10 and the humidifier 6 so as to humidify the room RM by the humidification operation of the humidifier 6. In the 2 nd humidification operation, the heating operation is not performed, but the air-conditioning indoor unit 2 feeds air having high humidity into the room RM, and therefore the air-sending operation by the air conditioner 10 is performed.
The control unit 8 selects the 1 ST humidification operation or the 2 nd humidification operation according to the temperature in the room (step ST 5). If the temperature detected by the indoor temperature sensor 31 is equal to or higher than the predetermined temperature T1 (step ST5: yes), the control unit 8 selects the 2 nd humidification operation. Conversely, if the temperature detected by the indoor temperature sensor 31 is lower than the predetermined temperature T1 (step ST5: no), the control unit 8 selects the 1 ST humidification operation.
In both the 1 ST humidification operation (step ST 6) and the 2 nd humidification operation (step ST 7), the humidification by the humidifier 6 is performed. The humidification operation performed in the 1 st humidification operation and the 2 nd humidification operation is the same as the humidification operation of the humidifier 6 performed in the normal mode humidification operation. However, in the humidification operation performed in the 1 st humidification operation and the 2 nd humidification operation, the maximum value of the humidification capacity occurring in the normal mode humidification operation is set to be equal to or higher than the maximum value. In the cleaning mode, priority is given to the operation for rapidly ending the cleaning mode without paying attention to the comfort of the room RM. Therefore, in the cleaning mode, the 1 st humidification operation or the 2 nd humidification operation is performed so that the absolute humidity in the room reaches the predetermined value AH1 as soon as possible, at or above the maximum value of the humidification capability occurring in the normal mode humidification operation. For example, when the humidification capacity of the normal mode humidification operation is set to L tap, M tap, and H tap in the order from low to high, the H tap is selected from the 1 st humidification operation and the 2 nd humidification operation.
In the 1 st humidification operation, the control unit 8 controls the humidifier 6 and the air conditioner 10 so as to perform a heating operation simultaneously with the humidification operation. The control unit 8 controls the air conditioner 10 so that the target temperature is set in advance for the cleaning mode. The heating operation performed by the air conditioner 10 in the washing mode is the same as the operation of the air conditioner 10 in the heating operation in the normal mode, and therefore, the description thereof is omitted here.
In both the case of the 1 ST humidification operation (step ST 6) and the case of the 2 nd humidification operation (step ST 7), the control unit 8 determines whether or not a predetermined time tt1 has elapsed from the start of humidification (step ST 8). If the predetermined time tt1 has not elapsed (step ST8: no), the process returns to step ST3, and the 1 ST humidification operation or the 2 nd humidification operation is continued until the absolute humidity in the room reaches the predetermined value AH1.
If the predetermined time tt1 has elapsed (step ST8: YES), an abnormality is notified (step ST 11), the end-time drying operation is performed (step ST 12), and the cleaning mode is ended.
When the absolute humidity in the room reaches a predetermined value AH1 (step ST4: YES), the cleaning operation is started (step ST 9). During the washing operation, the humidifier 6 stops the humidification operation. In the washing operation, the air conditioner 10 performs the same operation as the dehumidifying operation. In the air conditioning system 1 of this embodiment, the control unit 8 controls the air conditioner 10 to perform the same operation as the first dehumidification operation 1.
From the start of the washing operation, the control unit 8 starts counting by the timer 81 a. When the timer 81a has elapsed the predetermined time tt2 (yes in step ST 10), the control unit 8 ends the 1 ST dehumidification operation and performs the end-time drying operation (step ST 12).
The end-time drying operation in the cleaning mode is the same operation as the 1 st drying operation in the humidification operation in the normal mode. The control unit 8 stops the adsorption fan 65 and the adsorption rotor 61 of the humidifier 6 to dry the air suction and discharge hose 68. The control unit 8 switches the switching damper 63 so that the heater 62 of the humidifier 6 heats the air to generate an air flow from the 1 st outlet/inlet 63a to the 2 nd outlet/inlet 63b, and drives the suction/exhaust fan 64.
Here, as shown in fig. 8, it is assumed that the operation is started at the same time at time t10, and the operation in the cleaning mode and the humidification operation in the normal mode are compared. In the operation in the purge mode, since there is no operation for drying the intake/exhaust hose 68 before the humidification operation, the humidification operation is immediately started (time t 10). In the washing mode, the humidifying operation can be ended and the washing operation can be shifted to at time t11 when the 1 st drying operation in the normal mode continues. In the example shown in fig. 8, the cleaning operation in the cleaning mode is ended at time t12 when the 1 st drying operation in the normal mode humidification operation is ended. In the example shown in fig. 8, the end-time drying operation in the cleaning mode can be ended at time t13 when the humidification operation in the normal mode is ended.
(2-3-3) transition Condition to cleaning mode
The control unit 8 of the air conditioning system 1 automatically determines whether or not to shift to the washing mode in step ST 2. The processing of the control unit 8 for determining the transition condition of the cleaning mode will be described with reference to fig. 9.
The control unit 8 determines the operation mode (step ST 21). When the operation mode is the cleaning mode (YES in step ST 21), the accumulated drive time is reset (step ST 29).
When the operation mode is a mode other than the cleaning mode (no in step ST 21), the control unit 8 determines the type of operation (step ST 22). The air conditioning system 1 of the embodiment has a normal mode as an operation mode other than the cleaning mode. However, the air conditioning system 1 may be configured to have an operation mode other than the normal mode and the cleaning mode. The air conditioning system 1 can select a cooling operation, a heating operation, a dehumidifying operation, a humidifying operation, an air blowing operation, a ventilating operation, and an air cleaning operation as operations in the normal mode. The air conditioning system 1 may have, as the normal mode operation, operations other than the cooling operation, the heating operation, the dehumidifying operation, the humidifying operation, the blowing operation, the ventilating operation, and the air cleaning operation, or may be configured not to have one or more of the above-described operations.
When the air conditioning system 1 is performing the heating operation, the humidification operation, the blowing operation, the ventilation operation, or the air cleaning operation (yes in step ST 22), the control unit 8 counts the driving time of the indoor fan 22 (step ST 23). In other words, the heating operation, the humidification operation, the blowing operation, the ventilation operation, or the air-cleaning operation is performed, which means that the cooling operation and the dehumidification operation are performed. For example, the control arithmetic device 81b counts the driving time of the indoor fan 22 by using the timer 81a of the indoor control board 81. The control arithmetic device 81b causes the storage device 81c to store the counted drive time. The drive time of the indoor fan 22 is counted until the current operation is finished (step ST25: yes). For example, even in the heating operation, when the temperature of the room RM reaches the target temperature and the compressor 41, the indoor fan 22, and the like are stopped, the driving time of the indoor fan 22 is not counted.
The count of the driving time of the indoor fan 22 is performed for the 1 st driving time and the 2 nd driving time. The 1 st drive time is a drive time of the indoor fan 22 during operation of the air conditioning indoor unit 2 that heats air in the normal mode using the indoor heat exchanger 21. In other words, the 1 st drive time is the drive time of the indoor fan 22 during the heating operation (including the heating and humidifying operation) of the indoor unit 2. The 2 nd drive time is the drive time of the indoor fan 22 when the air conditioning indoor unit 2 that does not perform heat exchange using the indoor heat exchanger 21 in the normal mode is operated. In other words, the 2 nd drive time is the drive time of the indoor fan 22 during the humidification operation (except the heating humidification operation), the blowing operation, the ventilation operation, and the air cleaning operation.
When the air conditioning system 1 is performing the cooling operation or the dehumidifying operation (no in step ST 22), the control unit 8 determines whether or not the operation time of the cooling operation or the dehumidifying operation is equal to or longer than a predetermined time tt3 (step ST 24). For example, the control arithmetic device 81b counts the operation time of the cooling operation or the dehumidifying operation using the timer 81a of the indoor control board 81. The control arithmetic device 81b causes the storage device 81c to store the counted operation time. If the operation time of the cooling operation or the dehumidifying operation is not less than the predetermined time tt3 (step ST24: yes), the control unit 8 resets the cumulative drive time of the indoor fan 22 (step ST 29). In other words, the control unit 8 resets the accumulated drive time when the operation of the air conditioning indoor unit 2 in which condensation occurs in the indoor heat exchanger 21 is performed in the normal mode.
If the operation time of the cooling operation and the dehumidifying operation is shorter than the predetermined time tt3 (no in step ST 24), the control unit 8 does not count the driving time of the indoor fan 22, and proceeds to step ST25 of determining whether the current operation is finished. In other words, the control unit 8 performs the following control: the drive time of the indoor fan 22 when the air conditioning indoor unit 2 is operated to cause dew condensation in the indoor heat exchanger 21 in the normal mode is not counted as the cumulative drive time.
After the end of the current operation (step ST25: yes), the control unit 8 calculates the cumulative driving time of the indoor fan 22 (step ST 26). The control unit 8 accumulates the driving time stored in the storage device 81c and calculates the accumulated driving time. Here, the cumulative drive time is calculated by summing up the respective drive times of the indoor fans 22 in the heating operation, the humidification operation, the air blowing operation, the ventilation operation, and the air cleaning operation. However, the method of calculating the accumulated driving time is not limited to a method of simply summing the driving times of the respective operations. For example, the control unit 8 may be configured to calculate the accumulated driving time by weighting according to the type of operation.
The control unit 8 determines whether or not the accumulated drive time is equal to or longer than a predetermined drive time CT1 (step ST 27). If the accumulated drive time is equal to or longer than the predetermined drive time CT1 (step ST27: yes), the control unit 8 shifts to the cleaning mode (step ST 27). The determination at step ST27 in fig. 9 is an example of the determination at step ST2 in fig. 7. Here, if the accumulated drive time is equal to or longer than the predetermined drive time CT1, it is determined that the condition for shifting to the cleaning mode is satisfied. However, the condition for shifting to the cleaning mode is not limited to the accumulated driving time being equal to or longer than the predetermined driving time CT 1. As the condition for shifting to the cleaning mode, for example, a condition of stopping the operation in the normal mode may be added.
If the accumulated driving time is shorter than the predetermined driving time CT1 (no in step ST 27), the control unit 8 returns to the first step (step ST 21) and repeats the step of accumulating the accumulated driving time.
After the air conditioner shifts to the cleaning mode (step ST 28), the accumulated driving time is reset (step ST 29), and if the air conditioner system 1 is not stopped (step ST30: no), the process returns to the first (step ST 21) and the step of accumulating the accumulated driving time is repeated. In the case of the operation in the cleaning mode, since step ST21, step ST29, and step ST30 are repeated, the cumulative drive time is not counted even when the indoor fan 22 is driven.
(3) Modification examples
(3-1) modification 1A
In the above embodiment, the air conditioning system 1 in which the indoor heat exchanger 21 does not have the auxiliary heat exchange unit is exemplified. However, the air conditioning system 1 of the embodiment can use a heat exchanger having an auxiliary heat exchanger as the indoor heat exchanger 21. The auxiliary heat exchange portion is attached to, for example, the front surface side of the 1 st heat exchange portion 21F at a position higher than the middle in the vertical direction.
When the auxiliary heat exchange unit is provided in the indoor heat exchanger 21, the control unit 8 closes the electromagnetic valve 28 to adjust the operating frequency of the compressor 41 and the opening degree of the outdoor expansion valve 45 during the 2 nd dehumidification operation. The control unit 8 sets the auxiliary heat exchange unit to the evaporation region by the adjustment described above. At this time, the 1 st heat exchange unit 21F and the 2 nd heat exchange unit 21R are set to the superheated range.
(3-2) modification 1B
In the above embodiment, the following is explained: as the cleaning operation in the cleaning mode, the refrigerant circuit 13 performs a refrigeration cycle similar to the 1 st dehumidification operation in the normal mode. However, the cleaning operation in the cleaning mode, in which dew condensation occurs on the surface of the indoor heat exchanger 21, is not limited to the execution of the same refrigeration cycle as the first dehumidification operation.
The cleaning operation may be, for example, the following operation: when the cleaning operation is started, the 1 st dehumidification operation is performed, and the operation is changed to the 2 nd dehumidification operation or the 3 rd dehumidification operation from the middle. In this case, the control of the control unit 8 is as follows: at the start of the cleaning operation, substantially all of the 1 st heat exchange unit 21F and the 2 nd heat exchange unit 21R are set to the evaporation region, and the 2 nd heat exchange unit 21R is changed to the superheat region or the condensation region in the middle of the cleaning operation.
(3-3) modification 1C
In the above embodiment, the drying operation at the end of the cleaning mode (step ST 12) may include drying of the indoor heat exchanger 21 by the air-blowing/heating operation of the air conditioner 10.
(3-4) modification 1D
In the above embodiment, when the absolute humidity does not reach the predetermined value AH1 even after the predetermined time tt1 elapses, the control unit 8 ends the humidification of the humidifier 6 and notifies that the cleaning operation cannot be performed (step ST 11). However, the air conditioning system may be configured to perform processing different from that of the above embodiment when the absolute humidity does not reach the predetermined value AH1.
The processing after step ST10 may be changed in control of the control unit 8 of the air conditioning system 1 according to the above-described embodiment as follows, for example. When a predetermined time tt1 has elapsed from the start of humidification in the 1 ST humidification operation (step ST 6) or the 2 nd humidification operation (step ST 7), the control unit 8 starts the washing operation (step ST 9). The control of the control unit 8 after the start of the washing operation is performed in the same manner as in the above embodiment.
(3-5) modification 1E
In the above embodiment, the following case is explained: as the humidification operation in the cleaning mode, the 1 st humidification operation or the 2 nd humidification operation is selectively performed. However, the humidification operation in the humidification mode is not limited to the 1 st humidification operation or the 2 nd humidification operation. For example, the air conditioning system 1 may also be configured as follows: as the humidification operation in the cleaning mode, the following 3 rd humidification operation can be selected.
The 3 rd humidification operation is as follows: by supplying outdoor air to the room RM, moisture is supplied to the room RM. When the amount of moisture contained in the outdoor air is large, the absolute humidity of the room RM may be allowed to reach the predetermined value AH1 by supplying the outdoor air to the room RM. Before step ST5 shown in fig. 7, the control unit 8 determines whether or not the absolute humidity of the room RM can be made to reach a predetermined value AH1 by supplying outdoor air to the room RM. The control unit 8 detects the temperature and the relative humidity of the outdoor air by the outside air temperature sensor 51 and the outside air humidity sensor 71. For example, when the temperature of the outdoor air is equal to or higher than the predetermined temperature T2 and the relative humidity of the outdoor air is equal to or higher than the predetermined humidity RH1, the control unit 8 determines that the absolute humidity of the room RM can reach the predetermined value AH1. When determining that the air pressure reaches the predetermined value AH1, the control unit 8 drives the air suction/discharge fan 64 to perform an air supply operation of supplying outdoor air to the room RM through the air suction/discharge hose 68.
(3-6) modification 1F
In the above embodiment, the time during which the indoor fan 22 is driven in the normal mode operation is counted as the driving time. However, the method of counting the driving time is not limited to this method. For example, as a simple method of counting the driving time, the time of the normal mode operation may be counted. For example, when the operation time tt4 of a certain heating operation is assumed and the driving time tt5 of the indoor fan 22 in the heating operation is assumed (where tt5< tt 4), the operation time tt4 of the heating operation may be used as the driving time tt of the indoor fan 22.
(3-7) modification 1G
In modification 1F, the following will be explained: as a simple method of counting the number of indoor fans 22, the operation time of the normal mode operation is used as the drive time. In addition, for example, in the case where the air conditioning indoor unit 2 includes a cleaning mechanism for the air filter 24, the number of times the cleaning mechanism for the air filter 24 cleans may be regarded as the drive time of the indoor fan 22. For example, 1 cleaning of the cleaning mechanism is regarded as 10 hours or the like of the driving time of the indoor fan 22. The control unit 8 counts the number of times of cleaning by the cleaning mechanism in step ST23, and calculates the cumulative number of times of cleaning by the cleaning mechanism in step ST26, for example. If the cleaning mechanism performs cleaning a predetermined number of times (for example, 20 times) in step ST27, the control unit 8 determines that the mode is shifted to the cleaning mode. In step ST29, the control unit 8 resets the number of times of cleaning by the cleaning mechanism.
(3-8) modification 1H
In the above embodiment, the humidifier 6 and the air-conditioning outdoor unit 4 are integrated. However, the humidifier 6 disposed outdoors may not be integrated with the outdoor unit 4, or may be a separate unit. As a case where the humidifier 6 and the air-conditioning outdoor unit 4 disposed outdoors are separate bodies, for example, the air-conditioning outdoor unit 4 may be placed on the floor of the outdoors, and the humidifier 6 may be attached to an outer wall.
(3-9) modification 1I
In the above embodiment, the case where the air intake/exhaust hose 68 indirectly communicates with the space in the room RM via the air conditioning indoor unit 2 is shown. However, the air intake/exhaust hose 68 may be provided so as to directly communicate with the space in the room RM without passing through the indoor air conditioning unit 2.
(3-10) modification 1J
In the above embodiment, the case where the drying operation is not performed before the humidifying operation in the cleaning mode operation is described. However, as shown in fig. 10, the air conditioning system 1 may be configured to perform the 2 nd drying operation, which is shorter than the 1 st drying operation, before the humidifying operation in the washing mode operation. The time required for the 1 st drying operation is shorter than the time required for the 2 nd drying operation ((time t 12-time t 10) > (time t21-t 10)). Therefore, in the washing mode, the control unit 8 controls the humidifier 6 as follows: the suction/exhaust hose 68 is dried before the conveyance of the air to which moisture is applied is started in the 2 nd drying operation, which has a shorter operation time than the 1 st drying operation.
(3-11) modification 1K
In the above embodiment, the following is explained: when it is determined in step ST4 that the absolute humidity is equal to or higher than the predetermined value AH, the humidification operation is not performed, and the cleaning operation is started (step ST 9). However, as shown in fig. 11, after determining that the absolute humidity is equal to or greater than a predetermined value AH, it may be configured to determine whether or not the temperature in the room is equal to or greater than a predetermined temperature T1. When determining that the absolute humidity is equal to or higher than the predetermined value AH (yes in step ST 4), the control unit 8 next determines whether or not the indoor temperature is equal to or higher than the predetermined temperature T1 (step ST 13). In other words, the controller 8 selects whether or not to perform the 1 st humidification operation based on the temperature in the room. If the temperature detected by the indoor temperature sensor 31 is equal to or higher than the predetermined temperature T1 (step ST13: yes), the control unit 8 starts the washing operation (step ST 9). Conversely, if the temperature detected by the indoor temperature sensor 31 is lower than the predetermined temperature T1 (step ST13: no), the control unit 8 selects the 1 ST humidification operation. When the indoor temperature is too low, dew condensation water cannot be generated in a large amount, but by adding the determination of step ST13, it is possible to avoid a situation in which the indoor temperature is too low and dew condensation water cannot be generated in a large amount.
(4) Feature(s)
(4-1)
The humidifier 6 of the air conditioning system 1 according to the embodiment and modification 1J described above has the air suction and discharge hose 68. Therefore, in the normal mode, the control unit 8 causes the humidifier 6 to perform the 1 st drying operation of drying the air intake and exhaust hose 68 before the air to which moisture has been added starts to be fed through the air intake and exhaust hose 68. In contrast, in the cleaning mode, the control unit 8 of the embodiment does not cause the humidifier 6 to perform the operation of drying the air intake/exhaust hose 68 until the air to which moisture has been added starts to be supplied through the air intake/exhaust hose 68. In addition, the control unit 8 of modification 1J causes the humidifier 6 to perform the 2 nd drying operation of drying the intake/exhaust hose 68 before the conveyance of the air to which moisture has been added by the intake/exhaust hose 68 is started in the cleaning mode. The operation period of the 2 nd drying operation is shorter than the operation period of the 1 st drying operation.
In the case where the moisture-added air starts to be conveyed without performing the operation of drying the air intake/exhaust hose 68, the cleaning operation can be started early by shortening the operation time of the 1 st drying operation (the time from time t10 to time t12 in fig. 8). In the air conditioning system 1, when the air intake/exhaust hose 68 is dried before the moisture-added air starts to be delivered by the 2 nd drying operation in the cleaning mode, the cleaning operation can be started earlier by shortening the operation time of the 2 nd drying operation by an amount shorter than that of the 1 st drying operation (time from time t12 to time t 21).
(4-2)
In the air conditioning system 1 according to the embodiment and modification 1J, the control unit 8 controls the humidifier 6 in the following manner in the purge mode: the 3 rd drying operation, i.e., the end-time drying operation, in which the intake/exhaust hose 68 is dried after the cleaning operation of the indoor heat exchanger 21 is performed. By drying the air intake/exhaust hose 68 by the end-time drying operation (the 3 rd drying operation) after the cleaning operation, the condition of the air intake/exhaust hose 68 after the cleaning operation can be ensured to be good.
(4-3)
The humidifier 6 of the air conditioning system 1 according to embodiment and modification 1J includes the heater 62. The controller 8 controls the humidifier 6 in the end-time drying operation, which is the 3 rd drying operation, as follows: the function of applying moisture to the air is stopped, and the air heated by the heater 62 is passed through the air intake/exhaust hose 68. In this way, the air intake and exhaust hose 68 can be dried by the heater 62 of the humidifier 6, and therefore, the addition of equipment for drying the air intake and exhaust hose 68 at the end of the cleaning mode can be suppressed.
(4-4)
The humidifier 6 according to embodiment and modification 1J includes an adsorption rotor 61 serving as an adsorption member that adsorbs moisture in the outside air. The humidifier 6 applies moisture adsorbed from the outside air by the adsorption rotor 61 to the air sent to the room by the air intake and exhaust hose 68. In the case where there is no adsorption member such as the adsorption rotor 61, for example, a user needs to perform a moisture supply operation for supplying water used in the cleaning mode. In contrast, in the air conditioning system 1, moisture is obtained from the outside air by the adsorption rotor 61 in the cleaning mode, so that the moisture supply operation can be omitted, and the labor and time for cleaning the indoor heat exchanger 21 can be omitted.
(4-5)
In the cleaning mode, the control unit 8 of the embodiment and modification 1J controls the humidifier 6 so that the absolute humidity in the room reaches the predetermined value AH1 (steps ST6 and ST 7). After the humidification operation by the humidifier 6, the control unit 8 causes the indoor air conditioning unit 2 to perform a cleaning operation for cleaning the surface of the indoor heat exchanger 21 (particularly, the surface of the heat transfer fins 21 a) by causing condensation to occur on the surface. For example, before the cleaning mode, the room RM is dry due to weather conditions or the like, and the amount of moisture in the air in the room RM may be insufficient to sufficiently clean the indoor heat exchanger 21. However, in this case, the moisture in the air in the insufficient room RM can be replenished by the 1 ST humidification operation and/or the 2 nd humidification operation (steps ST6 and ST 7) in the cleaning mode. The air conditioning system 1 according to the embodiment and modification 1J described above can increase the absolute humidity of the room RM to the predetermined value AH1 (an example in which the humidity in the room is set to the predetermined humidity) by the 1 st humidification operation and/or the 2 nd humidification operation in the cleaning mode, and perform the cleaning operation using sufficient dew condensation water.
While the embodiments of the present invention have been described above, it is to be understood that various changes in the form and details may be made therein without departing from the spirit and scope of the present invention as set forth in the appended claims.
Description of the reference symbols
1. Air conditioning system
2. Indoor unit of air conditioner
6. Humidifier
8. Control unit
21. Indoor heat exchanger
62. Heating device
68. Air suction and exhaust hose
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2018-71905

Claims (6)

1. An air conditioning system (1), the air conditioning system (1) having:
an air-conditioning indoor unit (2) that has an indoor heat exchanger (21) and that exchanges heat between indoor air by passing the indoor air through the indoor heat exchanger;
a humidifier (6) having a hose (68) that communicates with the inside of the room and that transfers the air to which moisture has been added by the hose to humidify the air; and
a control unit (8) that controls the air conditioning indoor unit and the humidifier such that indoor air conditioning is performed in a normal mode, and a cleaning operation for cleaning the indoor heat exchanger is performed after indoor air is humidified in a cleaning mode,
the control unit controls the humidifier in the normal mode as follows: a 1 st drying operation of drying the hose before starting to convey the air to which the moisture is added,
the control unit controls the humidifier in the washing mode as follows: the method may further include starting to convey the air to which moisture has been applied without performing an operation of drying the hose, or drying the hose before starting to convey the air to which moisture has been applied by a 2 nd drying operation having an operation time shorter than that of the 1 st drying operation.
2. Air conditioning system (1) according to claim 1,
the control unit controls the humidifier in the washing mode as follows: and a 3 rd drying operation of drying the hose after the cleaning operation of the indoor heat exchanger.
3. Air conditioning system (1) according to claim 2,
the humidifier has a heater (62),
the controller controls the humidifier in the 3 rd drying operation as follows: the function of imparting moisture to the air is stopped and the air heated by the heater is passed through the hose.
4. Air conditioning system (1) according to any one of claims 1 to 3,
the humidifier includes an adsorption member that adsorbs moisture in the outside air, and the moisture adsorbed from the outside air by the adsorption member is applied to the air sent into the room by the hose.
5. Air conditioning system (1) according to any of claims 1 to 3,
the control unit controls the indoor unit of an air conditioner in the cleaning mode as follows: after controlling the humidifier to perform humidification, a cleaning operation is performed in which dew condensation water is generated on a surface of the indoor heat exchanger and the surface is cleaned by the dew condensation water.
6. Air conditioning system (1) according to claim 4,
the control unit controls the air conditioning indoor unit in the cleaning mode as follows: after controlling the humidifier to perform humidification, a cleaning operation is performed in which dew condensation water is generated on a surface of the indoor heat exchanger and the surface is cleaned by the dew condensation water.
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