JP2023035192A - Air-conditioner - Google Patents

Abstract

To properly control an exhaust operation of an air-conditioner according to the humidity of outdoor air.SOLUTION: An air-conditioner (1) is equipped with an outdoor unit (10), an indoor unit (30), and a ventilation device (20). The ventilation device (20) performs exhaust operation. During the exhaust operation, indoor air in an indoor space is discharged to the outside through a hose (2). A control portion (C) of the air-conditioner (1) performs ventilation control action. In the ventilation control action, the control portion (C) controls the ventilation device (20) to reduce the amount of dew condensation water in exhaust paths (2 and 28) in which air to be discharged to the outside by the exhaust operation of the ventilation device (20) flows, on the basis of a measurement value of an outside air humidity sensor (52).SELECTED DRAWING: Figure 2

Description

The present disclosure relates to an air conditioner.

Patent Literature 1 discloses an air conditioner having a function of ventilating an indoor space. This air conditioner includes a humidifier integrated with an outdoor unit. A humidifier is connected to the indoor unit via a hose. This air conditioner selectively performs an air supply operation in which outdoor air is supplied indoors through a hose and an exhaust operation in which indoor air is discharged outdoors through a hose.

JP 2021-038869 A

In the air conditioner of Patent Literature 1, there are cases where it is not appropriate to perform normal exhaust operation.

For example, when the outdoor air is very humid and the outdoor air is discharged from the indoor space being cooled, the discharged indoor air may cool the outdoor air and cause condensation.

In addition, outdoor air may flow into the hose when the air conditioner does not supply or exhaust air. Therefore, for example, when the exhaust operation is started in winter when the humidity of the outdoor air is very high, warm and moist indoor air flows into the hose from the indoor space being heated, and this indoor air is low temperature and high humidity inside the hose. Condensation may form inside the hose by mixing with the outdoor air.

Further, when the air conditioner performs the exhaust operation, outdoor air flows into the indoor space through gaps in the building. Therefore, for example, if the humidity of both the indoor air and the outdoor air is relatively high, even if the outdoor air flows into the indoor space, the humidity in the indoor space will not decrease. comfort may not be improved.

An object of the present disclosure is to appropriately control the exhaust operation of an air conditioner based on the humidity of outdoor air.

A first aspect of the present disclosure has an outdoor unit (10) installed in an outdoor space, an indoor unit (30) installed in an indoor space, and a hose (2) through which air flows. An air conditioner (1) comprising a ventilator (20) that exhausts indoor air to the outside through the hose (2), and an outdoor air humidity sensor that measures the humidity of the outdoor air in the outdoor space. (52) and, based on the measured value of the outside air humidity sensor (52), the amount of condensed water in the exhaust path (2, 28) through which the air discharged to the outside of the room flows due to the exhaust operation of the ventilation device (20) is reduced. a control unit (C) that performs a ventilation control operation to control the ventilator (20) so as to

In the first aspect, the control section (C) performs the ventilation control operation. In the ventilation control operation, the control unit (C) controls, based on the measured value of the outside air humidity sensor (52), the air exhaust path (2, 28) through which air is exhausted to the outside by the exhaust operation of the ventilation device (20). Control the ventilator (20) to reduce the amount of condensation water. As a result, the amount of condensed water produced by the exhaust operation of the ventilator (20) is reduced.

A second aspect of the present disclosure is the air conditioner (1) of the first aspect, wherein the ventilation control operation of the control unit (C) is such that the measured value of the outside air humidity sensor (52) reaches a first humidity. This is an operation for prohibiting the exhaust operation of the ventilator (20) when it exceeds.

In the second aspect, the exhaust operation of the ventilator (20) is prohibited when the measured value of the outside air humidity sensor (52) exceeds the first humidity. As a result, the amount of condensed water in the exhaust path (2, 28) through which the air discharged to the outside of the room by the exhaust operation of the ventilator (20) flows is reduced.

A third aspect of the present disclosure is the air conditioner (1) of the first aspect, wherein the ventilation control operation of the control unit (C) is such that the measured value of the outside air humidity sensor (52) reaches a first humidity. When the measured value of the outside air humidity sensor (52) is equal to or less than the first humidity, the flow rate of the air exhausted to the outside by the exhaust operation of the ventilation device (20) when it exceeds the flow rate of the ventilation device (20) This is an operation to increase the flow rate of the air discharged to the outside of the room by the exhaust operation.

In the third aspect, when the measured value of the outside air humidity sensor (52) exceeds the first humidity, the flow rate of the air discharged to the outside by the exhaust operation of the ventilation device (20) is measured by the outside air humidity sensor (52). It increases compared to when the value is less than or equal to the first humidity. As a result, the area in which the air flow stagnates in the exhaust path (2, 28) through which the air discharged to the outside of the room by the exhaust operation of the ventilator (20) is reduced, and the amount of condensed water in the exhaust path (2, 28) is reduced. .

A fourth aspect of the present disclosure is the air conditioner (1) of the first aspect, wherein the ventilator (20) is in an air supply operation for supplying outdoor air to the indoor space through the hose (2). , and a heating unit (25) for selectively performing the exhaust operation and heating the outdoor air flowing into the hose (2) during the air supply operation, and the ventilation control operation of the control unit (C) is and when the measured value of the outdoor air humidity sensor (52) exceeds the first humidity, the ventilation device (20) is caused to perform the air supply operation in a state where the heating unit (25) heats the outdoor air. This is an operation for performing the exhaust operation later.

In the fourth aspect, when the measured value of the outdoor air humidity sensor (52) exceeds the first humidity, the ventilation device (20) performs the air supply operation with the heating unit (25) heating the outdoor air. , perform exhaust operation. When the outdoor air heated by the heating part (25) flows through the inside of the hose (2), the inside of the hose (2) becomes dry. The inside of the hose (2) is dry when the exhaust operation is started. Therefore, during the exhaust operation, the amount of condensed water in the exhaust path (2, 28) through which the air discharged to the outside of the room by the exhaust operation of the ventilator (20) flows is reduced.

A fifth aspect of the present disclosure is the air conditioner (1) of the first aspect, further comprising an inside air temperature sensor (53) for measuring the temperature of indoor air in the indoor space, wherein the control unit (C) , the ventilation control operation is performed based on the measured value of the inside air temperature sensor (53) and the measured value of the outside air humidity sensor (52).

In the fifth aspect, the control section (C) performs ventilation control operation based on the measured value of the inside air temperature sensor (53) and the measured value of the outside air humidity sensor (52).

A sixth aspect of the present disclosure is the air conditioner (1) of the first aspect, further comprising an outdoor air temperature sensor (51) for measuring the temperature of the outdoor air in the outdoor space, wherein the controller (C) , the ventilation control operation is performed based on the measured value of the outside air temperature sensor (51) and the measured value of the outside air humidity sensor (52).

In the sixth aspect, the control section (C) performs ventilation control operation based on the measured value of the outside air temperature sensor (51) and the measured value of the outside air humidity sensor (52).

FIG. 1 is a diagram showing the configuration of an air conditioning system according to Embodiment 1. FIG. FIG. 2 is a diagram showing a refrigerant circuit and air circulation paths of the air conditioning system of Embodiment 1. FIG. 3 is a schematic cross-sectional view of an air conditioning indoor unit included in the air conditioning system of Embodiment 1. FIG. 4 is a block diagram showing a communication system of the air conditioning system of Embodiment 1. FIG. FIG. 5 is a flowchart showing control operations performed by a control unit according to the first embodiment; FIG. 6 is a flowchart showing control operations performed by a control unit according to the second embodiment. FIG. 7 is a flowchart showing control operations performed by a control unit according to the third embodiment. FIG. 8 is a flow chart showing control operations performed by a control unit according to the fourth embodiment.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note 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. Each drawing is for the purpose of conceptually explaining the present disclosure, and therefore dimensions, ratios or numbers may be exaggerated or simplified as necessary for ease of understanding.

<<Embodiment 1>>
The air conditioner of Embodiment 1 will be described.

(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 air conditioner outdoor unit (10) and an air conditioner indoor unit (30). The air conditioning outdoor unit (10) is installed outdoors, and the air conditioning indoor unit (30) is installed indoors. The air conditioner (1) is a pair type having one air conditioner indoor unit (30) and one air conditioner outdoor unit (10). An air conditioner (1) has a humidification unit (20). An air conditioner (1) has a function of humidifying air. The air conditioner (1) further has a function of ventilating the indoor space (I).

As shown in FIGS. 1 and 2, an air conditioner (1) has a hose (2), a liquid connection pipe (3), and a gas connection pipe (4). The air conditioning indoor unit (30) and the humidifying unit (20) are connected to each other via the hose (2). The air conditioning indoor unit (30) and the air conditioning 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 difluoromethane. However, the refrigerant is not limited to difluoromethane. 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) Air conditioner outdoor unit As shown in FIGS. 2 and 4, the air conditioner outdoor unit (10) includes an outdoor casing (11), a compressor (12), and an outdoor fan (13). , an outdoor heat exchanger (14), an expansion valve (15), and a four-way switching valve (16).

The outdoor casing (11) houses 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 air outlet (11b) is an opening for blowing out air that has passed through the outdoor heat exchanger (14). An outdoor air passage (11c) is formed inside the outdoor casing (11) from the outdoor suction port (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 passageway (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 passageway (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 pressure reducing 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 air conditioning 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 solid lines in FIG. 2) and a second state (shown by dashed lines 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 Unit The humidification unit (20) has a function of humidifying air. The humidification unit (20) also has a function of ventilating the indoor space (I). The humidification unit (20) is a ventilation device that ventilates the indoor space (I) in which the air conditioning indoor unit (30) is installed.

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

The humidifying casing (21) is integrally attached to the outdoor casing (11). The humidification 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 casing (21) is formed with a humidification intake 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 on the rear side of the humidification casing (21). The humidification exhaust port (21b) is formed in the front side of the humidification 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 taking in outdoor air or discharging air sent from the room. A first passageway (27) extending from the humidification suction port (21a) to the humidification exhaust port (21b) is formed inside the humidification casing (21). A second passageway (28) extending from the air intake/exhaust port (21c) to the connection port (21d) is formed inside the humidification casing (21). One end of the hose (2) is connected to the connection port (21d). The other end of the hose (2) is connected to the air conditioner indoor unit (30) and communicates with the internal space of the indoor casing (31) described later.

A 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 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 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).

A 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 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). A heater (25) is a heating part. 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. 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.

(2-3) Air Conditioner Indoor Unit As shown in FIGS. 1 to 3, the air conditioner indoor unit (30) is installed indoors. The air conditioning 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 air conditioning indoor unit (30) includes an indoor casing (31), an indoor fan (32), an air filter (33), an indoor heat exchanger (34), a drain pan (35), and a wind direction adjusting section (36). and

The indoor casing (31) houses an indoor fan (32), an air filter (33), an indoor heat exchanger (34) and a drain pan (35). 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 air outlet (31b) is an opening for blowing out air after heat exchange or air for humidification. The interior of the indoor casing (31) is provided with an indoor air passageway (31c) extending from the indoor air inlet (31a) to the indoor air outlet (31b).

The indoor fan (32) is arranged substantially in the center of the indoor air passageway (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). 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 air filter (33) is arranged upstream of the indoor heat exchanger (34) in the indoor air passageway (31c). The air 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 air 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 passageway (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 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 air conditioning 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 airflow direction adjusting section (36) adjusts the direction of the air blown out from the indoor air outlet (31b). The wind direction adjusting part (36) has a flap (37). The flap (37) is shaped like a long plate extending along the longitudinal direction of the indoor outlet (31b). The flap (37) is rotated by being driven by a motor. The flap (37) opens and closes the indoor outlet (31b) as it rotates.

The flap (37) is configured so that the angle of inclination can be changed stepwise. The positions to which the 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 flap (37) in the closed position substantially closes the indoor outlet (31b). A gap may be formed between the flap (37) in the closed position and the indoor outlet (31b).

(2-4) Remote Controller The remote controller (40) is placed indoors at a position where the user can operate it. 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 sensors for air 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 outside air temperature sensor (51) is provided in the air conditioning outdoor unit (10).

The outdoor air temperature sensor (51) is provided near the outdoor air inlet (11a) of the outdoor casing (11). The outdoor air temperature sensor (51) detects the temperature of outdoor air. The outside air humidity sensor (52) is provided near the humidification inlet (21a) of the humidification 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 relative humidity of the outdoor air, but may also detect the absolute humidity.

The inside air temperature sensor (53) and the inside air humidity sensor (54) are provided near the indoor air inlet (31a) of the air conditioning 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 relative humidity of the room air, but may also detect the absolute humidity.

(2-6) Controller The air conditioner (1) has a controller (C). The controller (C) controls the operation of the refrigerant circuit (R). The controller (C) controls the operation of the air conditioning outdoor unit (10), the humidifying unit (20), and the air conditioning indoor unit (30). The controller (C) includes an outdoor controller (OC) and an indoor controller (IC). The outdoor controller (OC) is provided in the air conditioner outdoor unit (10). An indoor controller (IC) is provided in the air conditioner indoor unit (30). Each of the indoor controller (IC) and the outdoor controller (OC) includes an MCU (Micro Control Unit), an electric 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.

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

The outdoor controller (OC) is connected to the compressor (12), the outdoor fan (13), the expansion valve (15) and the four-way switching valve (16). The outdoor control unit (OC) sends control signals for executing and stopping the operation of the air conditioning outdoor unit (10) to the compressor (12), the outdoor fan (13), the expansion valve (15), and the four-way switching valve. Output to (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 the expansion Controls the opening of the valve (15).

The outdoor controller (OC) is further connected to a humidification rotor (22), a first fan (23), a switching damper (24), a heater (25) and a second fan (26). The outdoor control section (OC) sends control signals for executing and stopping the operation of the humidification 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 controller (OC) controls the number of rotations 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).

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

The indoor controller (IC) is communicably connected to the remote controller (40). The indoor controller (IC) is connected to the indoor fan (32). The indoor controller (IC) outputs a control signal to the indoor fan (32) to start and stop the operation of the air conditioning indoor unit (30). The indoor controller (IC) controls the rotation speed of the seventh motor (M7) of the indoor fan (32). The indoor controller (IC) is communicably connected to the outdoor controller (OC).

A remote controller (40) is communicably connected to an indoor controller (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 air conditioning 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 each of the air conditioning outdoor unit (10) and the humidifying unit (20).

(3) Operation Operation The operation modes executed by the air conditioner (1) include cooling operation, heating operation, humidification operation, air supply operation, and exhaust 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 evaporation temperature of the indoor heat exchanger (34) so that the room temperature detected by the room 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) from the indoor outlet (31b) of the air conditioning 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 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 room temperature detected by the room 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) from the indoor outlet (31b) of the air conditioning indoor unit (30).

(3-3) Humidification operation Humidification operation is an operation of humidifying indoor air by the humidification unit (20). In the humidification operation, outdoor air is sent to the air conditioner indoor unit (30) through the hose (2), as indicated by the solid arrow in FIG. In the humidification operation, the control section (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.

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 through the hose (2) to the air conditioner indoor unit (30), and is discharged from the air outlet (31b) of the air conditioner indoor unit (30). It is supplied to the indoor space (I). Note that the humidification operation may be performed simultaneously with the heating operation.

(3-4) Air supply operation The air supply operation is an operation for supplying outdoor air to a room. In the air supply operation, outdoor air is sent to the air conditioner indoor unit (30) through the hose (2), as indicated by the solid arrow in FIG. 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. In the air supply operation, the outdoor air conveyed by the second fan (26) is sent to the air conditioning indoor unit (30) through the hose (2), and is discharged from the indoor outlet (31b) of the air conditioning indoor unit (30). It is supplied to the space (I). The air supply operation may be performed simultaneously with the cooling operation or the heating operation.

(3-5) Exhaust operation The exhaust operation is an operation in which indoor air is discharged to the outside. In the exhaust operation, room air is sent to the humidification unit (20) through the hose (2), as indicated by the dashed arrow in FIG. 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). In the exhaust operation, the indoor air conveyed by the second fan (26) is sent to the humidification unit (20) through the hose (2) and discharged to the outside through the air intake/exhaust port (21c) of the humidification unit (20). be. Note that the exhaust operation may be performed simultaneously with the cooling operation or the heating operation.

In the exhaust operation, the room air that has flowed into the hose (2) flows through the second passageway (28) of the humidification unit (20) and exits the humidification casing (21) through the air intake/exhaust port (21c) (that is, the outdoor space). is discharged to As described above, the second passageway (28) is a passageway extending from the intake/exhaust port (21c) to the connection port (21d). The hose (2) and the second passageway (28) form an "exhaust path through which air discharged to the outside of the room by the exhaust operation of the humidifying unit (20) flows".

(4) Control of Humidification Unit by Control Section The control section (C) performs a control operation of controlling the exhaust operation of the humidification unit (20) based on the measured value Ho of the outside air humidity sensor (52). This control operation will be described with reference to the flowchart of FIG.

The control operation shown in FIG. is a ventilation control operation that controls the humidification unit (20) so that the

(4-1) Step ST11
In the process of step ST11, the control section (C) acquires the measured value Ho of the outside air humidity sensor (52). After the processing of step ST11 is completed, the control section (C) performs the processing of step ST12.

(4-2) Step ST12
In the processing of step ST12, the control section (C) determines whether or not the condition that "the measured value Ho of the outside air humidity sensor (52) exceeds a predetermined first humidity H1 (Ho>H1)" is established. The first humidity H1 is, for example, 80% RH (H1=80% RH). If this condition is satisfied, the control section (C) performs the process of step ST13. On the other hand, if this condition is not satisfied, the control section (C) terminates this control operation.

(4-3) Step ST13
In the processing of step ST13, the control section (C) prohibits the exhaust operation of the humidification unit (20). The humidifying unit (20) whose exhaust operation is prohibited stops the exhaust operation if the exhaust operation is being performed. Further, the humidifying unit (20) prohibited from the exhaust operation does not perform the exhaust operation even if the user or the like inputs a signal instructing the execution of the exhaust operation during suspension of the exhaust operation.

(5) Features of Embodiment 1 (5-1)
For example, in a state where the humidity of the outdoor air is extremely high, when the indoor air is discharged from the indoor space (I) being cooled to the outside, the discharged indoor air cools the outdoor air, and the humidification casing (21) sucks and exhausts the air. Condensation may occur near the mouth (21c).

In addition, outdoor air may flow into the hose (2) when the humidifying unit (20) of the air conditioner (1) is stopped. Therefore, for example, when the humidity of the outdoor air is extremely high in winter, when the humidifying unit (20) starts the exhaust operation, warm and moist indoor air flows into the hose (2) from the indoor space (I) being heated. When this indoor air mixes with the low-temperature, high-humidity outdoor air in the hose (2), condensation may occur inside the hose (2).

In contrast, the control section (C) of the present embodiment prohibits the exhaust operation of the humidification unit (20) when the measured value Ho of the outside air humidity sensor (52) exceeds the first predetermined humidity H1. As a result, it is possible to reduce the amount of condensed water in the exhaust path (2, 28) through which the air exhausted to the outside of the room by the exhaust operation of the humidifying unit (20) flows.

(5-2)
When the humidifying unit (20) performs the exhaust operation, outdoor air flows into the indoor space (I) through gaps in the building (for example, house) in which the air conditioner (1) is installed. Therefore, when the humidifying unit (20) performs the exhaust operation in a state where the humidity of the outdoor air is extremely high, the highly humid outdoor air flows into the indoor space (I), and the comfort of the indoor space (I) decreases. There is a risk.

In contrast, the control section (C) of the present embodiment prohibits the exhaust operation of the humidification unit (20) when the measured value Ho of the outside air humidity sensor (52) exceeds the first predetermined humidity H1. As a result, it is possible to prevent high humidity outdoor air from flowing into the indoor space (I) due to the exhaust operation of the humidifying unit (20), thereby reducing the comfort of the indoor space (I). can be avoided.

(6) Modification of Embodiment 1 In the process of step ST13 of FIG. 5, the control section (C) of Embodiment 1 causes the humidification unit (20) to perform the exhaust operation instead of prohibiting the exhaust operation so that the air is discharged to the outside of the room. The flow rate of air (exhaust flow rate) may be reduced. In this case, the controller (C) reduces the exhaust flow rate by lowering the rotation speed of the second fan (26) of the humidification unit (20). When the control unit (C) performs this operation, when the measured value Ho of the outside air humidity sensor (52) exceeds the first humidity (Ho>H1), the exhaust air volume becomes When the humidity is equal to or less than the first humidity (Ho≤H1), the exhaust air volume is smaller. Also in this modification, the amount of condensed water in the exhaust path (2, 28) through which the air discharged to the outside of the room flows is reduced by the exhaust operation of the humidifying unit (20).

<<Embodiment 2>>
An air conditioner (1) of Embodiment 2 will be described.

The air conditioner (1) of this embodiment differs from the air conditioner (1) of the first embodiment in that the control operation performed by the controller (C) is changed. Here, the control operation performed by the control section (C) of the air conditioning system (1) of the present embodiment will be described with reference to the flowchart of FIG.

(1) Control operation of control unit The control operation shown in FIG. It is a ventilation control operation that controls the humidification unit (20) so that the amount of condensed water at (2, 28) is reduced.

(1-1) Step ST21
In the process of step ST21, the control section (C) acquires the measured value Ho of the outside air humidity sensor (52). After the processing of step ST11 is completed, the control section (C) performs the processing of step ST12.

(1-2) Step ST22
In the processing of step ST22, the control section (C) determines whether or not the condition that "the measured value Ho of the outside air humidity sensor (52) exceeds a predetermined first humidity H1 (Ho>H1)" is established. As in the first embodiment, the first humidity H1 is, for example, 80% RH (H1=80% RH). If this condition is satisfied, the control section (C) performs the process of step ST23. On the other hand, if this condition is not satisfied, the control section (C) terminates this control operation.

(1-3) Step ST23
In the process of step ST23, the control section (C) increases the flow rate (exhaust flow rate) of air discharged to the outside by the exhaust operation of the humidifying unit (20). In this case, the controller (C) increases the exhaust flow rate by increasing the rotation speed of the second fan (26) of the humidification unit (20).

(2) Features of Second Embodiment When the humidifying unit (20) of the air conditioner (1) is stopped, outdoor air may flow into the hose (2). Therefore, for example, when the humidity of the outdoor air is extremely high in winter, when the humidifying unit (20) starts the exhaust operation, warm and moist indoor air flows into the hose (2) from the indoor space (I) being heated. When this indoor air mixes with the low-temperature, high-humidity outdoor air in the hose (2), condensation may occur inside the hose (2).

Condensation tends to occur in areas of stagnant airflow. Therefore, the control section (C) of the present embodiment controls the rotation speed of the second fan (26) of the humidification unit (20) when the measured value Ho of the outside air humidity sensor (52) exceeds the predetermined first humidity H1. to increase the exhaust flow rate. When the exhaust flow rate increases, the flow velocity of air inside the hose (2) increases, and the area where the air flow stagnates decreases or disappears. As a result, the amount of condensed water in the exhaust path (2, 28) through which the air discharged to the outside of the room by the humidifying unit (20) flows is reduced.

<<Embodiment 3>>
An air conditioner (1) of Embodiment 3 will be described.

The air conditioner (1) of this embodiment differs from the air conditioner (1) of the first embodiment in that the control operation performed by the controller (C) is changed. Here, the control operation performed by the control section (C) of the air conditioning system (1) of the present embodiment will be described with reference to the flowchart of FIG.

(1) Control operation of control unit The control operation shown in FIG. It is a ventilation control operation that controls the humidification unit (20) so that the amount of condensed water at (2, 28) is reduced.

(1-1) Step ST31
In the processing of step ST31, the control section (C) acquires the measured value Ho of the outside air humidity sensor (52). After the processing of step ST31 is completed, the control section (C) performs the processing of step ST32.

(1-2) Step ST32
In the process of step ST32, the control section (C) determines whether or not the condition that "the measured value Ho of the outside air humidity sensor (52) exceeds a predetermined first humidity H1 (Ho>H1)" is established. As in the first embodiment, the first humidity H1 is, for example, 80% RH (H1=80% RH). If this condition is satisfied, the control section (C) performs the process of step ST33. On the other hand, if this condition is not satisfied, the control section (C) terminates this control operation.

(1-2) Step ST33
In the processing of step ST33, the control section (C) causes the humidifying unit (20) to perform the drying operation for a predetermined period of time. The humidification unit (20) in drying operation performs air supply operation while heating the outdoor air with the heater (25).

Specifically, in the dry operation, the switching damper (24) is in the first state, the second fan (26) and the heater (25) operate, and the outdoor air heated by the heater (25) flows through the hose (2). supplied to In the drying operation, the first fan (23) and humidifying rotor (22) are stopped. During the humidification operation, the outdoor air heated by the heater (25) to reduce the relative humidity flows through the inside of the hose (2). As a result, the inside of the hose (2) becomes dry.

(1-3) Step ST34
After the processing of step ST33 is completed, the control section (C) performs the processing of step ST34. In the processing of step ST34, the control section (C) causes the humidification unit (20) to perform the exhaust operation. In the exhaust operation, the switching damper (24) is in the second state, the second fan (26) operates, and the indoor air in the indoor space (I) flows through the hose (2) and the second passageway (28) in order. discharged to the outside. In the exhaust operation, the first fan (23), humidification rotor (22) and heater (25) are stopped.

(2) Features of Embodiment 3 When the humidifying unit (20) of the air conditioner (1) is stopped, outdoor air may flow into the hose (2). Therefore, for example, when the humidity of the outdoor air is extremely high in winter, when the humidifying unit (20) starts the exhaust operation, warm and moist indoor air flows into the hose (2) from the indoor space (I) being heated. When this indoor air mixes with the low-temperature, high-humidity outdoor air in the hose (2), condensation may occur inside the hose (2).

In contrast, when the measured value Ho of the outside air humidity sensor (52) exceeds the first humidity H1 (Ho>H1), the control section (C) of the present embodiment causes the humidification unit (20) to perform the drying operation. Then execute the exhaust operation. When the humidifying unit (20) performs the drying operation, the outdoor air heated by the heater (25) flows through the inside of the hose (2) to dry the inside of the hose (2). The inside of the hose (2) is dry when the humidification unit (20) starts the exhaust operation. Therefore, during the exhaust operation, the amount of condensed water in the exhaust path through which the air discharged to the outside of the room by the humidification unit (20) flows decreases.

<<Embodiment 4>>
The air conditioner (1) of Embodiment 4 will be described.

The air conditioner (1) of this embodiment differs from the air conditioner (1) of the first embodiment in that the control operation performed by the controller (C) is changed. Here, the control operation performed by the control section (C) of the air conditioning system (1) of the present embodiment will be described with reference to the flowchart of FIG.

(1) Control operation of control unit The control operation shown in FIG. It is a ventilation control operation that controls the humidification unit (20) so that the amount of condensed water at (2, 28) is reduced.

(1-1) Step ST41
In the process of step ST41, the control section (C) acquires the measured value Ho of the outside air humidity sensor (52), the measured value To of the outside air temperature sensor (51), and the measured value Tr of the inside air temperature sensor (53). do. After the processing of step ST41 is completed, the control section (C) performs the processing of step ST42.

(1-2) Step ST42
In the processing of step ST42, the control section (C) uses the measured value Ho of the outside air humidity sensor (52) and the measured value To of the outside air temperature sensor (51) to calculate the dew point DPo of the outside air humidity. After the process of step ST42 is completed, the control section (C) performs the process of step ST43.

(1-3) Step ST43
In the processing of step ST43, the control section (C) determines whether or not the condition that "the measured value Tr of the inside air temperature sensor (53) is equal to or lower than the dew point DPo of the outdoor air (Tr≦DPo)" is established. If this condition is satisfied, the control section (C) performs the process of step ST44. On the other hand, if this condition is not satisfied, the control section (C) terminates this control operation.

(1-4) Step ST44
In the processing of step ST44, the control section (C) prohibits the exhaust operation of the humidification unit (20). The humidifying unit (20) whose exhaust operation is prohibited stops the exhaust operation if the exhaust operation is being performed. Further, the humidifying unit (20) prohibited from the exhaust operation does not perform the exhaust operation even if a signal instructing the execution of the exhaust operation is input from the user or the like while the exhaust operation is suspended.

(2) Features of Embodiment 4 The temperature and humidity of the air near the intake/exhaust port (21c) of the humidification casing (21) are substantially the same as the temperature and humidity of the outdoor air. On the other hand, during the exhaust operation, the air exhausted from the indoor space (I) passes through the air intake/exhaust port (21c) of the humidification casing (21). Therefore, if the temperature of the indoor air discharged from the indoor space (I) is equal to or lower than the dew point of the outdoor air, dew condensation may occur around the intake/exhaust port (21c).

In contrast, the controller (C) of the present embodiment prohibits the exhaust operation of the humidifying unit (20) when the measured value Tr of the inside air temperature sensor (53) is equal to or lower than the outdoor air dew point DPo. As a result, it is possible to reduce the amount of condensed water in the exhaust path through which the air exhausted to the outside of the room by the exhaust operation of the humidifying unit (20) flows.

(3) Modification of Embodiment 4 In the process of step ST44 of FIG. 8, the controller (C) of Embodiment 4 controls the exhaust operation of the humidification unit (20) instead of prohibiting the exhaust operation. The flow rate of air (exhaust flow rate) may be reduced. In this case, the controller (C) reduces the exhaust flow rate by lowering the rotation speed of the second fan (26) of the humidification unit (20). Also in this modification, the amount of condensed water in the exhaust path (2, 28) through which the air discharged to the outside of the room flows is reduced by the exhaust operation of the humidifying unit (20).

<<Other embodiments>>
In the air conditioners (1) of Embodiments 1 to 4, the outdoor air humidity sensor (52) may be provided near the outdoor suction port (11a) of the outdoor casing (11). The outside air humidity sensor (52) may be provided near the connection port (21d) of the humidification casing (21) to which the hose (2) is connected.

In the air conditioners (1) of Embodiments 1 to 4, the humidifying unit (20), which is a ventilator, may be configured separately from the outdoor unit. Further, the air conditioner (1) of Embodiments 1 to 4 may be provided with a ventilator that performs an air supply operation and an air exhaust operation without performing a humidification operation.

Although embodiments and variations have been described above, it will be appreciated that various changes in form and detail may be made without departing from the spirit and scope of the claims. In addition, the embodiments and modifications described above may be appropriately combined or replaced as long as the functions of the object of the present disclosure are not impaired. In addition, the descriptions of "first", "second", "third", etc. in the specification and claims are used to distinguish words and phrases to which these descriptions are given, and the words and phrases Neither the number nor the order is limited.

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

1 air conditioner
2 Hose (exhaust path)
10 Air conditioning outdoor unit (outdoor unit)
20 Humidification unit (ventilator)
25 Heater (heating part)
28 Second passage (exhaust route)
30 Air conditioning indoor unit (indoor unit)
51 Ambient temperature sensor
52 Outside Humidity Sensor
53 Air temperature sensor
54 Air Humidity Sensor
C control unit

Claims (6)

an outdoor unit (10) installed in an outdoor space;
an indoor unit (30) installed in an indoor space;
An air conditioner (1) comprising a ventilator (20) having a hose (2) through which air flows, and exhausting indoor air in the indoor space to the outside through the hose (2). ,
an outside air humidity sensor (52) for measuring the humidity of the outdoor air in the outdoor space;
Based on the measured value of the outdoor air humidity sensor (52), the amount of condensed water in the exhaust path (2, 28) through which the air discharged to the outside of the room by the exhaust operation of the ventilation device (20) flows is reduced. and a control section (C) that performs a ventilation control operation to control the ventilator (20). In the air conditioner (1) according to claim 1,
The ventilation control operation of the control unit (C) is an operation of prohibiting the exhaust operation of the ventilation device (20) when the measured value of the outside air humidity sensor (52) exceeds the first humidity. In the air conditioner (1) according to claim 1,
The ventilation control operation of the control section (C) controls the flow rate of air exhausted to the outside by the exhaust operation of the ventilator (20) when the measured value of the outdoor air humidity sensor (52) exceeds the first humidity. and an air conditioner that increases the flow rate of air discharged to the outside by the exhaust operation of the ventilator (20) when the measured value of the outside air humidity sensor (52) is equal to or lower than the first humidity. In the air conditioner (1) according to claim 1,
The ventilator (20) is
Selectively performing an air supply operation for supplying outdoor air to the indoor space through the hose (2) and the exhaust operation,
A heating unit (25) for heating outdoor air flowing into the hose (2) during the air supply operation,
When the measured value of the outdoor air humidity sensor (52) exceeds the first humidity, the ventilation control operation of the control section (C) causes the heating section (25) to heat the outdoor air to the ventilator (20). The air conditioner is an operation in which the exhaust operation is performed after the air supply operation is performed in a state where the exhaust operation is performed. In the air conditioner (1) according to claim 1,
Equipped with an inside air temperature sensor (53) that measures the temperature of the indoor air in the indoor space,
The control section (C) is an air conditioner that performs the ventilation control operation based on the measured value of the inside air temperature sensor (53) and the measured value of the outside air humidity sensor (52). In the air conditioner (1) according to claim 1,
An outside air temperature sensor (51) that measures the temperature of the outdoor air in the outdoor space,
The control section (C) is an air conditioner that performs the ventilation control operation based on the measured value of the outside air temperature sensor (51) and the measured value of the outside air humidity sensor (52).

Images