WO2023032397A1

WO2023032397A1 - Air conditioner

Info

Publication number: WO2023032397A1
Application number: PCT/JP2022/023094
Authority: WO
Inventors: 幸子松本
Original assignee: ダイキン工業株式会社
Priority date: 2021-08-31
Filing date: 2022-06-08
Publication date: 2023-03-09
Also published as: JP2023034984A; JP2023036074A; CN117813468A; JP7227521B1

Abstract

An air conditioner (1) comprises: an indoor unit (30) that adjusts the temperature of indoor air; a ventilator (20) that exhausts the indoor air; and a controller (C) that controls the operation of the indoor unit (30) and ventilator (20). The indoor unit (30) has a filter (33) that removes dust from air drawn in from a room, and a filter cleaning mechanism (60, 70) that removes dust adhering to the filter (33). In the indoor unit (30), a ventilation port (2a) that communicates with the ventilator (20) is disposed downstream of the filter (33) in the internal air flow direction. The controller (C) stops or suppresses the exhaust from the ventilator (20) when the filter cleaning mechanism (60, 70) is in operation.

Description

air conditioner

The present disclosure relates to an air conditioner.

In a conventional indoor unit of an air conditioner, dust contained in the inhaled indoor air is attached to a filter and captured, and the dust attached to the filter is automatically removed using a filter cleaning mechanism. The filter cleaning mechanism includes a type in which the filter cleaning mechanism is moved with respect to the filter together with the dust box (dust box moving type) and a type in which the filter is moved with respect to the filter cleaning mechanism (filter moving type).

Patent Document 1 describes that the dust collected by the filter cleaning mechanism is discharged outdoors using a ventilation device.

JP 2007-205656 A

However, in a conventional air conditioner having a dust box moving type filter cleaning mechanism, fine particles easily pass through the filter during filter cleaning. be further encouraged. As a result, dust enters the rear side of the filter when viewed from the filter cleaning mechanism, making it difficult to remove the dust with the filter cleaning mechanism.

In addition, in a conventional air conditioner having a filter-moving type filter cleaning mechanism, the heat exchanger and the like are not covered by the filter during filter cleaning. is released and adheres to the heat exchanger and the like, resulting in deterioration of the performance of the indoor unit.

An object of the present disclosure is to provide an air conditioner that can suppress the movement and release of dust adhering to the filter during filter cleaning operation.

A first aspect of the present disclosure includes an indoor unit (30) that adjusts the temperature of indoor air, a ventilation device (20) that exhausts the indoor air, and the indoor unit (30) and the ventilation device (20). ) and a control unit (C) for controlling the operation of the air conditioner. The indoor unit (30) has a filter (33) for removing dust from air taken from the room, and a filter cleaning mechanism (60, 70) for removing the dust attached to the filter (33). . The indoor unit (30) is provided with a ventilation port (2a) communicating with the ventilation device (20) downstream of the filter (33) in the direction of internal air flow. The control section (C) stops or suppresses exhaust by the ventilator (20) when the filter cleaning mechanism (60, 70) is in operation.

In the first aspect, since the exhaust by the ventilation device (20) is stopped or suppressed during the filter cleaning operation, the dust adhering to the surface of the filter (33) is prevented from moving to the back side or separating from the filter (33). can be suppressed. Therefore, dust can be easily removed by the filter cleaning mechanism (60, 70), and dust, which causes mold and the like, can be prevented from entering the ventilation opening (2a).

In the second aspect of the present disclosure, in the first aspect, the heat exchanger (34) is arranged downstream of the ventilation port (2a) in the air flow direction inside the indoor unit (33).

In the second aspect, the ventilation port (2a) of the ventilator (20) is located between the filter (33) and the heat exchanger (34). Therefore, dust in the air taken in from the room can be suppressed from entering the ventilation port (2a) during ventilation. Further, during ventilation and air supply, heat can be exchanged between the supplied air and the heat exchanger (34).

A third aspect of the present disclosure is the second aspect, wherein the distance between the heat exchanger (34) and the ventilation port (2a) is 100 mm or less.

In the third aspect, even when the ventilation opening (2a) is provided inside the indoor unit (30), an increase in the size of the indoor unit (30) can be suppressed.

In a fourth aspect of the present disclosure, in any one of the first to third aspects, the filter cleaning mechanism (60) includes a dust box (62) containing the dust removed from the filter (33). The filter cleaning mechanism (60) moves with respect to the filter (33) together with the dust box (62) to clean the filter (33).

In the fourth aspect, since the heat exchanger (34) and the like are covered with the filter (33) even during the filter cleaning operation, the dust is separated from the filter (34) and reaches the heat exchanger (34) and the like. Adhesion can be suppressed.

In a fifth aspect of the present disclosure, in any one of the first to third aspects, the filter cleaning mechanism (70) moves the filter (33) with respect to the filter cleaning mechanism (70). to clean the filter (33).

In the fifth aspect, the dust adhering to the surface of the filter (33) is less likely to pass through the filter (33) during the filter cleaning operation and enter the rear side of the filter (33), thus facilitating dust removal.

In a sixth aspect of the present disclosure, in any one of the first to fifth aspects, the control unit (C) controls the ventilation device ( 20) to stop or suppress the exhaust for a predetermined time or longer.

In the sixth aspect, it is possible to further prevent dust released from the filter (33) during the filter cleaning operation from entering the ventilation opening (2a) and causing mold and the like.

FIG. 1 is a diagram showing an example of the overall configuration of an air conditioner according to an embodiment. FIG. 2 is a diagram illustrating a refrigerant circuit and an air flow path of the air conditioner shown in FIG. 1. FIG. 3 is a cross-sectional view showing an example of the configuration of the indoor unit of the air conditioner shown in FIG. 1. FIG. 4 is a cross-sectional view showing another example of the configuration of the indoor unit of the air conditioner shown in FIG. 1. FIG. 5 is a block diagram showing the configuration of the control unit of the air conditioner shown in FIG. 1. FIG. 6 is a flowchart of an example of filter cleaning operation of the air conditioner shown in FIG. 1. FIG.

(embodiment)
Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. It should be noted that the present disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of the present disclosure. Since each drawing is for conceptually explaining the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding.

(1) Overview of Configuration of Air Conditioner The air conditioner (1) adjusts the temperature and humidity of the air in the target space. The target space in this example is the indoor space (I). As shown in FIG. 1, the air conditioner (1) has an outdoor unit (10) and an indoor unit (30). The outdoor unit (10) is installed outdoors, and the indoor unit (30) is installed indoors. The air conditioner (1) is a pair type having one indoor unit (30) and one outdoor unit (10). An air conditioner (1) has a ventilation device (hereinafter referred to as a humidification ventilation unit) (20) having a humidification function. An air conditioner (1) has a function of ventilating an indoor space (I). The air conditioner (1) further has a function of humidifying air.

As shown in FIGS. 1 and 2, the air conditioner (1) has a hose (2), a liquid connection pipe (3), and a gas connection pipe (4).

The indoor unit (30) and the humidification/ventilation unit (20) are connected to each other via the hose (2). One end of the hose (2) is connected to an extension (2b) (see FIG. 2) that terminates at a ventilation port (hereinafter referred to as an indoor ventilation port) (2a) inside the indoor unit (30). When the air is exhausted by the humidification/ventilation unit (20), the room ventilation port (2a) serves as an inflow port into which the room air flows. When air is supplied by the humidification/ventilation unit (20), the indoor ventilation opening (2a) serves as an outlet through which outdoor air flows.

The indoor unit (30) and the outdoor unit (10) are connected to each other via a liquid communication pipe (3) and a gas communication pipe (4). Thereby, a refrigerant circuit (R) is configured. The refrigerant circuit (R) is filled with refrigerant. The refrigerant is not particularly limited, but may be difluoromethane, for example. The refrigerant circuit (R) performs a vapor compression refrigeration cycle.

The refrigerant circuit (R) mainly has a compressor (12), an outdoor heat exchanger (14), an expansion valve (15), a four-way switching valve (16), and an indoor heat exchanger (34). .

The refrigerant circuit (R) performs the first refrigerating cycle and the second refrigerating cycle according to switching of the four-way switching valve (16). The first refrigerating cycle is a refrigerating cycle in which the indoor heat exchanger (34) functions as an evaporator and the outdoor heat exchanger (14) functions as a radiator. The second refrigerating cycle is a refrigerating cycle in which the outdoor heat exchanger (14) functions as a radiator and the indoor heat exchanger (34) functions as an evaporator.

(2) Detailed Configuration (2-1) Outdoor Unit As shown in FIGS. 1 and 2, the outdoor unit (10) includes an outdoor casing (11), a compressor (12), an outdoor fan (13), It has an outdoor heat exchanger (14), an expansion valve (15), and a four-way switching valve (16).

The outdoor casing (11) accommodates a compressor (12), an outdoor fan (13), an outdoor heat exchanger (14), an expansion valve (15) and a four-way switching valve (16). The outdoor casing (11) is formed with an outdoor inlet (11a) and an outdoor outlet (11b). The outdoor suction port (11a) is formed on the rear side of the outdoor casing (11). The outdoor air inlet (11a) is an opening for sucking outdoor air. The outdoor outlet (11b) is formed on the front side of the outdoor casing (11). The outdoor outlet (11b) is an opening for blowing out air that has passed through the outdoor heat exchanger (14). An outdoor air passageway (11c) is formed inside the outdoor casing (11) from the outdoor inlet (11a) to the outdoor outlet (11b).

The compressor (12) sucks and compresses low-pressure gas refrigerant. The compressor (12) is driven by a first motor (M1). The compressor (12) is a variable displacement compressor in which power is supplied from an inverter circuit to the first motor (M1). The compressor (12) is configured such that its operating capacity can be changed by adjusting the operating frequency (rotational speed) of the first motor (M1).

The outdoor fan (13) is arranged in the outdoor air passage (11c). The outdoor fan (13) is rotated by driving the second motor (M2). Air carried by the outdoor fan (13) is sucked into the outdoor casing (11) through the outdoor suction port (11a). This air flows through the outdoor air passageway (11c) and is blown out of the outdoor casing (11) through the outdoor outlet (11b). The outdoor fan (13) conveys outdoor air so as to pass through the outdoor heat exchanger (14).

The outdoor heat exchanger (14) is arranged upstream of the outdoor fan (13) in the outdoor air passage (11c). The outdoor heat exchanger (14) of this example is a fin-and-tube heat exchanger. The outdoor heat exchanger (14) is an example of a heat source heat exchanger. The outdoor heat exchanger (14) exchanges heat between the refrigerant flowing therein and the outdoor air conveyed by the outdoor fan (13).

The expansion valve (15) is an example of a decompression mechanism. The expansion valve (15) reduces the pressure of the refrigerant. The expansion valve (15) is an electrically operated expansion valve whose degree of opening is adjustable. The decompression mechanism may be a temperature-sensitive expansion valve, an expander, a capillary tube, or the like. The expansion valve (15) may be connected to the liquid line of the refrigerant circuit (R), and may be provided in the indoor unit (30).

The four-way switching valve (16) is an example of a channel switching mechanism. The four-way switching valve (16) has a first port (P1), a second port (P2), a third port (P3) and a fourth port (P4). The first port (P1) is connected to the discharge of the compressor (12). The second port (P2) is connected to the intake of the compressor (12). The third port (P3) is connected to the gas end of the outdoor heat exchanger (14). The fourth port (P4) is connected to the gas communication pipe (4).

The four-way switching valve (16) is switched between a first state (shown by the solid line in Fig. 2) and a second state (state shown by the broken line in Fig. 2). The four-way switching valve (16) in the first state allows communication between the first port (P1) and the third port (P3) and communication between the second port (P2) and the fourth port (P4). The four-way switching valve (16) in the second state allows communication between the first port (P1) and the fourth port (P4) and communication between the second port (P2) and the third port (P3).

(2-2) Humidification/ventilation unit The humidification/ventilation unit (20) is installed outdoors. The humidification ventilation unit (20) of this example is integrated with the outdoor unit (10). The humidification/ventilation unit (20) sends moisture in the outdoor air to the indoor unit (30). The humidification/ventilation unit (20) includes a humidification/ventilation casing (21), a humidification rotor (22), a first fan (23), a switching damper (24), a heater (25), and a second fan (26). and

The humidification ventilation casing (21) is integrally attached to the outdoor casing (11). The humidification ventilation casing (21) houses a humidification rotor (22), a first fan (23), a switching damper (24), a heater (25), and a second fan (26). The humidification/ventilation casing (21) is formed with a humidification suction port (21a), a humidification exhaust port (21b), and an intake/exhaust port (21c). The humidification suction port (21a) and the suction/exhaust port (21c) are formed, for example, on the rear side of the humidification/ventilation casing (21). The humidification exhaust port (21b) is formed, for example, on the front side of the humidification ventilation casing (21).

The humidification suction port (21a) is an opening for sucking outdoor air. The humidification exhaust port (21b) is an opening for discharging the air after applying moisture to the humidification rotor (22). The intake/exhaust port (21c) is an opening for sucking in outdoor air or discharging air sent from the room. A first passageway (27) extending from the humidification intake port (21a) to the humidification exhaust port (21b) is formed inside the humidification/ventilation casing (21). A second passageway (28) extending from the air intake/exhaust port (21c) to the connection port (21d) is formed inside the humidification/ventilation casing (21). A hose (2) is connected to the connection port (21d).

The humidification rotor (22) is arranged across the first passageway (27) and the second passageway (28). The humidification rotor (22) is an adsorption member that adsorbs moisture in the air. The humidification rotor (22) is, for example, a disk-shaped humidity control rotor having a honeycomb structure. A humidifying rotor (22) holds an adsorbent such as silica gel, zeolite, or alumina. The adsorbent has the property of adsorbing moisture in the air. Moisture absorbents have the property of desorbing adsorbed moisture when heated.

The humidification rotor (22) is rotated by driving the third motor (M3). The humidification rotor (22) has a moisture absorption area (22A) that adsorbs moisture in the air and a moisture release area (22B) that desorbs moisture in the air. The moisture absorption region (22A) is constituted by a portion of the humidification rotor (22) located in the first passageway (27). The moisture release area (22B) is configured by a portion of the humidification rotor (22) located in the second passageway (28).

The first fan (23) is arranged in the first passageway (27). The first fan (23) is rotated by driving the fourth motor (M4). The first fan (23) is configured to be able to switch the air volume in a plurality of stages by adjusting the rotational speed of the fourth motor (M4). The air conveyed by the first fan (23) is sucked into the humidification/ventilation casing (21) through the humidification suction port (21a). This air flows through the first passageway (27) and is discharged to the outside of the humidification/ventilation casing (21) through the humidification exhaust port (21b). The first fan (23) conveys outdoor air so as to pass through the moisture absorption region (22A) of the humidification rotor (22). Moisture contained in the outdoor air flowing through the first passageway (27) is adsorbed by the moisture absorption region (22A) of the humidification rotor (22).

The switching damper (24) is arranged in the second passageway (28). The switching damper (24) has a first entrance (24a) and a second entrance (24b). The first inlet/outlet (24a) communicates with the intake/exhaust port (21c). The second inlet/outlet (24b) communicates with the hose (2) connection port (21d) in the humidification/ventilation casing (21). The switching damper (24) is switched between a first state and a second state. The switching damper (24) in the first state has a first port (24a) as an inlet for sucking air and a second port (24b) as an outlet for discharging air. The switching damper (24) in the second state has an inlet for sucking air as a second inlet (24b) and an outlet for discharging air as a first inlet (24a). The state of the switching damper (24) is switched by driving the fifth motor (M5).

The heater (25) is arranged between the intake/exhaust port (21c) and the switching damper (24) in the second passageway (28). The heater (25) heats air flowing through the second passageway (28). The heater (25) has a variable output. The temperature of the air passing through the heater (25) changes according to the output of the heater (25).

The second fan (26) is arranged between the first entrance (24a) and the second entrance (24b) of the switching damper (24). The second fan (26) is rotated by driving the sixth motor (M6). The second fan (26) is configured to be able to switch the air volume in a plurality of steps by adjusting the rotation speed of the sixth motor (M6). The flow of air carried by the second fan (26) changes according to the state of the switching damper (24). Specifically, when the switching damper (24) is in the first state, air sucked through the first inlet/outlet (24a) flows out to the second inlet/outlet (24b) as indicated by the solid line arrow in FIG. In this case, the humidification/ventilation unit (20) supplies air to the indoor space (I) from the indoor ventilation port (2a) through the hose (2). When the switching damper (24) is in the second state, air sucked through the second inlet/outlet (24b) flows out to the first inlet/outlet (24a) as indicated by the dashed arrow in FIG. In this case, the humidification/ventilation unit (20) exhausts air from the indoor space (I) through the indoor ventilation port (2a) through the hose (2).

(2-3) Indoor Unit As shown in FIGS. 1 to 3, the indoor unit (30) is installed indoors. The indoor unit (30) is a wall-mounted type that is installed on the wall (WL) of the room that forms the indoor space (I). The indoor unit (30) includes an indoor casing (31), an indoor fan (32), a filter (33), an indoor heat exchanger (34), a drain pan (35), an air direction adjusting section (36), and a filter cleaning mechanism (60).

The indoor casing (31) accommodates an indoor fan (32), a filter (33), an indoor heat exchanger (34), a drain pan (35), and a filter cleaning mechanism (60). The indoor casing (31) is formed with an indoor suction port (31a) and an indoor outlet (31b). The indoor suction port (31a) is arranged above the indoor casing (31). The indoor air intake (31a) is an opening for sucking indoor air. The indoor outlet (31b) is arranged below the indoor casing (31). The indoor outlet (31b) is an opening for blowing out air after heat exchange, air for ventilation supply, or air for humidification. The interior of the indoor casing (31) is provided with an indoor air passageway (31c) extending from the indoor suction port (31a) to the indoor outlet (31b).

The indoor fan (32) is arranged substantially in the center of the indoor air passage (31c). The indoor fan (32) is an example of a blower. The indoor fan (32) is, for example, a cross-flow fan. The indoor fan (32) is rotated by driving the seventh motor (M7) (see FIG. 2). The indoor fan (32) takes indoor air into the indoor air passageway (31c) and conveys it. The air carried by the indoor fan (32) is sucked into the indoor casing (31) through the indoor suction port (31a). This air flows through the indoor air passageway (31c) and is blown out of the indoor casing (31) from the indoor outlet (31b).

The indoor fan (32) conveys indoor air so as to pass through the indoor heat exchanger (34). The air blown out from the indoor air outlet (31b) is supplied to the indoor space. The indoor fan (32) is configured such that the air volume can be switched in multiple stages by adjusting the rotation speed of the seventh motor (M7).

The filter (33) is arranged upstream of the indoor heat exchanger (34) in the indoor air passage (31c). The filter (33) is attached to the indoor casing (31) so that substantially all of the air supplied to the indoor heat exchanger (34) passes through. The filter (33) collects dust in the air sucked through the indoor air inlet (31a).

The indoor heat exchanger (34) is arranged upstream of the indoor fan (32) in the indoor air passage (31c). The indoor heat exchanger (34) of this example is a fin-and-tube heat exchanger. The indoor heat exchanger (34) is an example of a utilization heat exchanger. The indoor heat exchanger (34) exchanges heat between the refrigerant therein and indoor air conveyed by the indoor fan (32).

The indoor air vent (2a) is arranged downstream of the filter (33) and upstream of the indoor heat exchanger (34) in the indoor air passage (31c). In other words, the indoor heat exchanger (34) is arranged downstream of the indoor air vent (2a) in the indoor air passageway (31c). The distance between the indoor heat exchanger (34) and the indoor ventilation opening (2a) may be, for example, about 100 mm or less.

The drain pan (35) is arranged on the lower front side and the lower rear side of the indoor heat exchanger (34). The drain pan (35) receives condensed water generated inside the indoor casing (31) of the indoor unit (30). Condensed water generated on the surface of the fins of the indoor heat exchanger (34) flows down due to its own weight along the surface and is received by the drain pan (35).

The wind direction adjusting section (36) adjusts the direction of the air blown out from the indoor outlet (31b). The wind direction adjusting part (36) has a blowout flap (37). The blowout flap (37) is shaped like a long plate extending along the longitudinal direction of the indoor blowout port (31b). The blow-out flap (37) is rotated by being driven by a motor. The blow flap (37) opens and closes the indoor air outlet (31b) as it rotates.

The blowout flap (37) is configured so that the tilt angle can be changed step by step. The positions to which the blow flap (37) in this example is adjusted include six positions. These six positions include a closed position and five open positions. The five open positions include the generally horizontal blow position shown in FIG. The outlet flap (37) in the closed position substantially closes the indoor outlet (31b). A gap may be formed between the blow flap (37) in the closed position and the indoor air outlet (31b).

The filter cleaning mechanism (60) removes dust adhering to the filter (33). The filter cleaning mechanism (60) is configured to be movable with respect to the filter (33). The filter cleaning mechanism (60) includes a cleaning section (61) for removing dust adhering to the filter (33) with a brush or the like, and a dust box (62) for storing the dust removed from the filter (33) by the cleaning section (61). and That is, the filter cleaning mechanism (60) shown in FIG. 3 is of the dust box moving type that moves on the filter (33) together with the dust box (62). The dust collected by the dust box (62) may be taken out of the indoor unit (30) through a dust discharge mechanism (63) provided below the filter (33).

Instead of the dust box moving type filter cleaning mechanism (60) shown in FIG. 3, a filter moving type filter cleaning mechanism (70) shown in FIG. 4 may be provided. 4, the same components as those of the indoor unit (30) shown in FIG. 3 are denoted by the same reference numerals.

The filter cleaning mechanism (70) cleans the filter (33) by moving the filter (33) with respect to the filter cleaning mechanism (70). The filter cleaning mechanism (70) has a drive section (71) for winding the filter (33) using a pulley or the like, and a cleaning section (72) for removing dust adhering to the filter (33) with a brush or the like. The dust removed from the filter (33) by the cleaning section (72) accumulates in the dust discharge mechanism (73) provided below the filter (33), and passes through the dust discharge mechanism (73) to the indoor unit (30). It may be possible to take out to the outside of.

(2-4) Remote Controller As shown in FIG. 1, the remote controller (40) is placed indoors at a position where the user can operate it. As shown in FIGS. 1 and 2, the remote controller (40) has a display section (41) and an input section (42). The display (41) displays predetermined information. The display section (41) is composed of, for example, a liquid crystal monitor. The predetermined information is information indicating the operating state, set temperature, and the like of the air conditioner (1). An input unit (42) receives an input operation for performing various settings from a user. The input section (42) is composed of, for example, a plurality of physical switches. The user can set the operation mode, target temperature, target humidity, etc. of the air conditioner (1) by operating the input section (42) of the remote controller (40).

(2-5) Sensors As shown in FIG. 2, the air conditioner (1) has a plurality of sensors. The plurality of sensors includes a sensor for refrigerant and a sensor for air. The refrigerant sensor includes a sensor that detects the temperature and pressure of the high-pressure refrigerant and a sensor that detects the temperature and pressure of the low-pressure refrigerant (not shown).

The air sensors include an outside air temperature sensor (51), an outside air humidity sensor (52), an inside air temperature sensor (53), and an inside air humidity sensor (54). The outdoor temperature sensor (51) is provided in the outdoor unit (10). The outdoor air temperature sensor (51) detects the temperature of outdoor air. The outside air humidity sensor (52) is provided in the humidification ventilation unit (20). The outside air humidity sensor (52) detects the humidity of the outside air. The outdoor air humidity sensor (52) of this example detects the absolute humidity of the outdoor air, but may also detect the relative humidity. The inside air temperature sensor (53) and the inside air humidity sensor (54) are provided in the indoor unit (30). The inside air temperature sensor (53) detects the temperature of the inside air. A room air humidity sensor (54) detects the humidity of the room air. The room air humidity sensor (54) detects the absolute humidity of the room air, but may also detect the relative humidity.

(2-6) Control Unit As shown in FIG. 5, the air conditioner (1) has a control unit (C). The controller (C) controls the operation of the refrigerant circuit (R). The control section (C) controls operations of the outdoor unit (10), the humidification/ventilation unit (20), and the indoor unit (30). As shown in FIGS. 2 and 5, the controller (C) includes an outdoor controller (OC) and an indoor controller (IC). An outdoor control unit (OC) is provided in the outdoor unit (10). An indoor controller (IC) is provided in the indoor unit (30). Each of the indoor control unit (IC) and the outdoor control unit (OC) includes an MCU (Micro Control Unit), an electrical circuit, and an electronic circuit. The MCU includes a CPU (Central Processing Unit), a memory, and a communication interface. Various programs for the CPU to execute are stored in the memory.

The detection value of the outside air temperature sensor (51) and the detection value of the outside air humidity sensor (52) are input to the outdoor control unit (OC).

The outdoor control unit (OC) is connected to the compressor (12), outdoor fan (13), expansion valve (15) and four-way switching valve (16). The outdoor control unit (OC) sends control signals for executing and stopping the operation of the outdoor unit (10) to the compressor (12), the outdoor fan (13), the expansion valve (15), and the four-way switching valve ( 16). The outdoor control unit (OC) controls the operating frequency of the first motor (M1) of the compressor (12), the rotation speed of the second motor (M2) of the outdoor fan (13), the state of the four-way switching valve (16), and It controls the opening of the expansion valve (15).

The outdoor controller (OC) is further connected to the humidification rotor (22), first fan (23), switching damper (24), heater (25), and second fan (26). The outdoor control unit (OC) sends control signals for executing and stopping the operation of the humidification/ventilation unit (20) to the humidification rotor (22), the first fan (23), the switching damper (24), the second fan (26), and output to the heater (25). The outdoor control unit (OC) controls the number of revolutions of the fourth motor (M4) of the first fan (23) and the sixth motor (M6) of the second fan (26), the humidification rotor (22) and the switching damper (24 ) and the output of the heater (25).

The detection value of the inside air temperature sensor (53) and the detection value of the inside air humidity sensor (54) are input to the indoor control unit (IC).

The indoor control unit (IC) is communicably connected to the remote controller (40). The indoor controller (IC) is connected to the indoor fan (32), the wind direction adjuster (36), and the filter cleaning mechanism (60,70). The indoor control unit (IC) sends control signals for executing and stopping the operation of the indoor unit (30) to the indoor fan (32), the wind direction adjusting unit (36), and the filter cleaning mechanism (60, 70). Output. The indoor control unit (IC) controls the number of rotations of the seventh motor (M7) of the indoor fan (32), the state of the airflow direction adjusting unit (36) (inclination angle of the blowout flap (37)), the filter cleaning mechanism (60, 70 ) behavior. The indoor controller (IC) is communicably connected to the outdoor controller (OC).

The remote controller (40) is communicably connected to the indoor control unit (IC). The remote controller (40) transmits an instruction signal instructing the operation of the air conditioner (1) to the indoor controller (IC) according to the user's operation on the input section (42). Upon receiving an instruction signal from the remote controller (40), the indoor controller (IC) transmits the instruction signal to the outdoor controller (OC). The indoor controller (IC) controls the operation of each device of the indoor unit (30) according to the instruction signal. When the outdoor controller (OC) receives an instruction signal from the indoor controller (IC), it controls the operation of the outdoor unit (10) and the humidifying/ventilating unit (20).

(3) Operation Operation The operation modes executed by the air conditioner (1) include cooling operation, heating operation, humidification operation, air supply operation, exhaust operation, and filter cleaning operation. The controller (C) executes these operations based on instruction signals from the remote controller (40).

(3-1) Cooling operation Cooling operation is an operation in which indoor air is cooled by the indoor heat exchanger (34) as an evaporator. The set temperature for the cooling operation is instructed from the remote controller (40) at the start of the cooling operation or during the cooling operation. In cooling operation, the controller (C) operates the compressor (12), the outdoor fan (13), and the indoor fan (32). The controller (C) sets the four-way switching valve (16) to the first state. The control section (C) appropriately adjusts the degree of opening of the expansion valve (15). In the cooling operation, a first refrigeration cycle is performed in which the compressed refrigerant releases heat in the outdoor heat exchanger (14) and evaporates in the indoor heat exchanger (34).

In cooling operation, the controller (C) adjusts the target evaporating temperature of the indoor heat exchanger (34) so that the room temperature detected by the inside air temperature sensor (53) converges to the set temperature. The control section (C) controls the rotation speed of the compressor (12) such that the evaporation temperature of the refrigerant in the indoor heat exchanger (34) converges to the target evaporation temperature. In the cooling operation, the air conveyed by the indoor fan (32) is cooled as it passes through the indoor heat exchanger (34). The air cooled by the indoor heat exchanger (34) is supplied to the indoor space (I) through the indoor outlet (31b) of the indoor unit (30).

(3-2) Heating operation The heating operation is an operation in which the indoor air is heated by the indoor heat exchanger (34) as a radiator. The set temperature for the heating operation is instructed from the remote controller (40) at the start of the heating operation or during the heating operation. In the heating operation, the controller (C) operates the compressor (12), the outdoor fan (13), and the indoor fan (32). The controller (C) sets the four-way switching valve (16) to the second state. The control section (C) appropriately adjusts the degree of opening of the expansion valve (15). In the heating operation, a second refrigeration cycle is performed in which refrigerant compressed by the compressor (12) releases heat in the indoor heat exchanger (34) and evaporates in the outdoor heat exchanger (14).

In heating operation, the controller (C) adjusts the target condensing temperature of the indoor heat exchanger (34) so that the indoor temperature detected by the indoor air temperature sensor (53) converges to the set temperature. The control section (C) controls the rotation speed of the compressor (12) such that the condensation temperature of the refrigerant in the indoor heat exchanger (34) converges to the target condensation temperature. In the heating operation, the air conveyed by the indoor fan (32) is heated as it passes through the indoor heat exchanger (34). The air heated by the indoor heat exchanger (34) is supplied to the indoor space (I) through the outlet (31b) of the indoor unit (30).

(3-3) Humidification operation Humidification operation is an operation to humidify indoor air by the humidification ventilation unit (20). In the humidification operation, outdoor air is sent to the indoor unit (30) through the hose (2), as indicated by the solid arrow in FIG. In the humidification operation, the controller (C) operates the heater (25), the humidification rotor (22) and the first fan (23). A control part (C) operates a 2nd fan (26). The control section (C) sets the switching damper (24) to the first state. The controller (C) stops the compressor (12) and the outdoor fan (13). In the humidification operation, the refrigeration cycle is not performed in the refrigerant circuit (R).

In the humidification operation, the outdoor air conveyed by the first fan (23) passes through the moisture absorption area (22A) of the humidification rotor (22), and moisture contained in the outdoor air passes through the moisture absorption area (22A) of the humidification rotor (22). 22A). The portion of the humidification rotor (22) that has adsorbed moisture as the moisture absorption area (22A) moves to the second passageway (28) as the humidification rotor (22) rotates to form a moisture release area (22B). Outdoor air heated by the heater (25) passes through the moisture release area (22B) of the humidification rotor (22), and moisture is desorbed from the humidification rotor (22) to the heated air. In the humidification operation, high-humidity air added with moisture by the humidification rotor (22) is sent to the indoor unit (30) through the hose (2), and the indoor air outlet (31b) of the indoor unit (30) is supplied to the indoor space. (I).

(3-4) Air supply operation The air supply operation is an operation for supplying outdoor air to a room. In the air supply operation, as indicated by the solid arrow in FIG. 2, the outdoor air is sent from the indoor ventilation port (outlet) (2a) to the indoor unit (30) through the hose (2) and the extension (2b). In the air supply operation, the controller (C) stops the heater (25), the humidification rotor (22), and the first fan (23) and operates the second fan (26). The control section (C) sets the switching damper (24) to the first state. The controller (C) stops the compressor (12) and the outdoor fan (13). In the air supply operation, the refrigeration cycle in the refrigerant circuit (R) is not performed. In the air supply operation, the outdoor air conveyed by the second fan (26) is sent to the indoor unit (30) through the hose (2), and is discharged from the indoor air outlet (31b) of the indoor unit (30) into the indoor space ( I).

(3-5) Exhaust operation The exhaust operation is an operation in which indoor air is discharged to the outside. In the exhaust operation, as indicated by the dashed arrow in Fig. 2, the indoor air is humidified from the indoor ventilation port (inlet) (2a) in the indoor unit (30) through the extension (2b) and the hose (2). It is sent to the ventilation unit (20). In the exhaust operation, the controller (C) stops the heater (25), the humidification rotor (22), and the first fan (23) and operates the second fan (26). The control section (C) sets the switching damper (24) to the second state. The controller (C) stops the compressor (12) and the outdoor fan (13). In the exhaust operation, the refrigeration cycle is not performed in the refrigerant circuit (R). In the exhaust operation, the indoor air conveyed by the second fan (26) is sent to the humidification/ventilation unit (20) through the hose (2), and is discharged to the outside through the intake/exhaust port (21c) of the humidification/ventilation unit (20). Ejected.

(3-6) Filter cleaning operation The filter cleaning operation is an operation for removing dust adhered to the filter (33) by the various operations described above using the filter cleaning mechanism (60, 70). The filter cleaning operation may be performed based on an instruction signal from the remote controller (40), or may be performed after completion of the various operations described above or at other predetermined timing. In the filter cleaning operation, the controller (C) stops the compressor (12), the outdoor fan (13) and the outdoor fan (33). That is, the refrigeration cycle in the refrigerant circuit (R) is not performed in the filter cleaning operation. In the filter cleaning operation, the controller (C) stops the heater (25), the humidification rotor (22), and the first fan (23). That is, the humidification operation is not performed in the filter cleaning operation.

Specifically, as shown in FIG. 6, first, in step S1, the control unit (C) determines whether the exhaust operation is in progress. If the exhaust operation is being performed, the controller (C) stops the exhaust operation or suppresses the exhaust in step S2. Suppression of exhaust means that the amount of exhaust air from the humidification/ventilation unit (20) when the filter cleaning operation is performed is made smaller than the amount of exhaust air from the humidification/ventilation unit (20) when the filter cleaning operation is not performed.

After performing step S2, in step S3, the control unit (C) activates the filter cleaning mechanism (60, 70) to start the filter cleaning operation. During the filter cleaning operation, the control section (C) may close the air outlet (31b) by moving the air outlet flap (37) to the closed position.

Next, in step S4, the control section (C) stops the operation of the filter cleaning mechanism (60, 70) to end the filter cleaning operation. Subsequently, in step S5, the control section (C) determines whether a predetermined time (for example, about 5 minutes) has passed. If it is determined that the predetermined time has passed, in step S6, the control unit (C) cancels the stop of the exhaust operation or the suppression of exhaust that was performed in step S2. As a result, the humidification/ventilation unit (20) restarts the exhaust operation or increases the exhaust air volume of the humidification/ventilation unit (20).

On the other hand, if it is determined in step S1 that the exhaust operation is not being performed, the control section (C) does not perform step S2 and operates the filter cleaning mechanism (60, 70) in step S7 as in step S3. to start the filter cleaning operation. Next, in step S8, the control section (C) stops the operation of the filter cleaning mechanism (60, 70) to end the filter cleaning operation, as in step S4. In this case, the controller (C) does not perform steps S5 and S6.

When performing step S2, the control section (C) may stop or suppress the exhaust by the humidification/ventilation unit (20) for the entire period from the start to the end of the filter cleaning operation, or It may be part of that period.

Further, when performing step S2, the control section (C) may stop or suppress the exhaust by the humidification ventilation unit (20) for a predetermined period of time or longer after the filter cleaning operation is completed.

- Features of the embodiment -
As described above, the air conditioner (1) of the present embodiment includes an indoor unit (30) for adjusting the temperature of indoor air, a humidification/ventilation unit (20) for exhausting indoor air, and an indoor unit (30) and a controller (C) for controlling the operation of the humidification ventilation unit (20). The indoor unit (30) has a filter (33) for removing dust from air taken from the room, and a filter cleaning mechanism (60, 70) for removing dust adhering to the filter (33). The indoor unit (30) is provided with an indoor ventilation port (2a) that communicates with the humidification/ventilation unit (20) downstream of the filter (33) in the internal air flow direction (indoor air passageway (31c)). The control section (C) stops or suppresses exhaust by the ventilator (20) when the filter cleaning mechanism (60, 70) is in operation.

According to the air conditioner (1) of the present embodiment, the dust adhering to the surface of the filter (33) is removed from the back side of the filter (33) because the exhaust air from the humidifying/ventilating unit (20) is stopped or suppressed during the filter cleaning operation. movement to or release from the filter (33). Therefore, dust can be easily removed by the filter cleaning mechanism (60, 70), and dust that causes mold and the like can be prevented from entering the indoor ventilation opening (2a).

In the air conditioner (1) of the present embodiment, the heat exchanger (34) may be arranged downstream of the indoor ventilation port (2a) in the indoor air passage (31c). With this configuration, the indoor ventilation opening (2a) of the humidification/ventilation unit (20) is located between the filter (33) and the heat exchanger (34). Therefore, dust in the air taken in from the room can be suppressed from entering the room ventilation opening (2a) during ventilation. Further, during ventilation and air supply, heat can be exchanged between the supplied air and the heat exchanger (34). In this case, if the distance between the heat exchanger (34) and the indoor ventilation port (2a) is 100 mm or less, even if the indoor ventilation port (2a) is provided inside the indoor unit (30), the indoor unit ( 30) can be suppressed.

In the air conditioner (1) of the present embodiment, the filter cleaning mechanism (60) (see FIG. 3) has a dust box (62) for storing dust removed from the filter (33). The filter (33) may be cleaned by moving the filter cleaning mechanism (60) relative to the filter (33). With this configuration, the heat exchanger (34) and the like are covered with the filter (33) even during the filter cleaning operation, so dust is released from the filter (34) and adheres to the heat exchanger (34) and the like. can be suppressed.

In the air conditioner (1) of the present embodiment, the filter cleaning mechanism (70) may clean the filter (33) by moving the filter (33) relative to the filter cleaning mechanism (70). This makes it difficult for dust adhering to the surface of the filter (33) to pass through the filter (33) during the filter cleaning operation and reach the rear side of the filter (33), thereby facilitating the removal of dust.

In the air conditioner (1) of the present embodiment, after the filter cleaning mechanism (60, 70) has finished operating, the control section (C) stops or suppresses exhaust air from the humidification/ventilation unit (20) for a predetermined time or more. good too. In this way, it is possible to further prevent dust released from the filter (33) during the filter cleaning operation from entering the interior ventilation opening (2a) and causing mold and the like.

<<Other embodiments>>
In the above-described embodiment, the ventilation device of the present disclosure is configured as a humidification ventilation unit (20) and installed outdoors in an integrated manner with the outdoor unit (10). As long as it can perform, the configuration, arrangement, etc. are not particularly limited. For example, the ventilator of the present disclosure may not have humidification functionality. Further, the ventilation device of the present disclosure may be installed indoors integrally with or separately from the indoor unit (30), or may be installed outdoors separately from the outdoor unit (10). In other words, the ventilation fan of the ventilation system of the present disclosure may be installed outdoors such as the outdoor unit (10), or may be installed indoors such as the indoor unit (30).

Although the embodiments have been described above, it will be understood that various changes in form and detail are possible without departing from the spirit and scope of the claims. Moreover, the above-described embodiments may be appropriately combined or replaced as long as the functions of the object of the present disclosure are not impaired. Furthermore, the descriptions of "first", "second", ... described above are used to distinguish the words and phrases to which these descriptions are given, and even limit the number and order of the words and phrases. isn't it.

As described above, the present disclosure is useful for air conditioners.

1 air conditioner 20 humidification and ventilation unit (ventilator)
2a Indoor ventilation opening (ventilation opening)
30 indoor unit 33 filter 34 heat exchanger 60 filter cleaning mechanism 62 dust box 70 filter cleaning mechanism C control unit

Claims

an indoor unit (30) for adjusting the temperature of indoor air;
a ventilator (20) for exhausting the indoor air;
a controller (C) for controlling the operation of the indoor unit (30) and the ventilator (20),
The indoor unit (30) has a filter (33) for removing dust from air taken from the room, and a filter cleaning mechanism (60, 70) for removing the dust attached to the filter (33). death,
The indoor unit (30) is provided with a ventilation port (2a) communicating with the ventilation device (20) on the downstream side of the filter (33) in the internal air flow direction,
The control unit (C) is an air conditioner that stops or suppresses exhaust by the ventilator (20) when the filter cleaning mechanism (60, 70) is in operation.
In the air conditioner of claim 1,
An air conditioner in which a heat exchanger (34) is arranged downstream of the ventilation opening (2a) in the air flow direction inside the indoor unit (30).
In the air conditioner of claim 2,
An air conditioner, wherein the distance between the heat exchanger (34) and the ventilation opening (2a) is 100 mm or less.
In the air conditioner according to any one of claims 1 to 3,
The filter cleaning mechanism (60) has a dust box (62) that stores the dust removed from the filter (33). An air conditioner that cleans the filter (33) by moving against it.
In the air conditioner according to any one of claims 1 to 3,
The filter cleaning mechanism (70) is an air conditioner that cleans the filter (33) by moving the filter (33) with respect to the filter cleaning mechanism (70).
In the air conditioner according to any one of claims 1 to 5,
The control unit (C) is an air conditioner that stops or suppresses exhaust by the ventilator (20) for a predetermined time or longer after the filter cleaning mechanism (60, 70) has finished operating.