WO2023032379A1

WO2023032379A1 - Humidifier

Info

Publication number: WO2023032379A1
Application number: PCT/JP2022/022506
Authority: WO
Inventors: 幸子松本; 康史鵜飼
Original assignee: ダイキン工業株式会社
Priority date: 2021-08-31
Filing date: 2022-06-02
Publication date: 2023-03-09
Also published as: JP2023034999A; CN117716180A; CN117716179A; WO2023032341A1

Abstract

This humidifier comprises: an adsorption member (22) that adsorbs moisture from outdoor air; regeneration units (25, 26) that separate moisture to be supplied to a target space (I) from the adsorption member (22); and a control unit (C) that sets an output of each of the regeneration units (25, 26) to a first value when the absolute humidity of the outdoor air is first humidity and sets the output of each of the regeneration units (25, 26) to a second value smaller than the first value when the absolute humidity of the outdoor air is second humidity lower than the first humidity.

Description

humidifier

The present disclosure relates to humidifiers.

Patent Document 1 discloses a non-water supply type humidifier (air conditioner). An air conditioner adsorbs moisture in outdoor air with a humidification rotor. When the air heated by the heater flows through the humidification rotor, moisture is desorbed from the adsorbent of the humidification rotor. The desorbed air containing moisture is sent to the air conditioning indoor unit through the hose. The air conditioning indoor unit supplies moisture-containing air to the target space. This humidifies the air in the target space.

JP 2017-044395 A

Under conditions of low outdoor air humidity, the amount of moisture adsorbed by the humidification rotor decreases. In spite of this, there is a problem that power is wasted if the output of the regenerating part such as the heater for regenerating the humidifying rotor is set to the normal output.

The purpose of the present disclosure is to suppress wasteful consumption of energy required for regeneration of the adsorption member.

A first aspect is directed to a humidifying device. The humidifier includes an adsorption member (22) that adsorbs moisture in the outdoor air, a regeneration unit (25, 26) that desorbs the moisture supplied to the target space (I) from the adsorption member (22), an outdoor air The output of the regeneration unit (25, 26) is set to a first value when the absolute humidity of the outdoor air is a first humidity, and the regeneration unit (25, 26) when the absolute humidity of the outdoor air is a second humidity lower than the first humidity and a control section (C) for setting the outputs of (25, 26) to a second value smaller than the first value.

In the first aspect, when the absolute humidity of the outdoor air is the second humidity lower than the first humidity, the control section (C) sets the output of the regeneration section (25, 26) to the second humidity lower than the first humidity. value. As a result, the output of the regeneration section (25, 26) can be reduced under conditions where the amount of water adsorbed by the adsorption member (22) is relatively small. As a result, wasteful consumption of energy required for regeneration of the adsorption member (22) can be suppressed.

In a second aspect, the regeneration section includes a heater (25) in the first aspect.

In the second aspect, the output of the heater (25) can be reduced under conditions where the amount of water adsorbed by the adsorption member (22) is relatively small.

In a third aspect based on the first or second aspect, the regeneration section includes a first fan (26) that conveys air containing moisture desorbed from the adsorption member (22) to the target space (I). including.

In the third aspect, the output of the fan ( ) can be reduced under conditions where the amount of water adsorbed by the adsorption member (22) is relatively small.

A fourth aspect is any one of the first to third aspects, further comprising a second fan (23) for conveying outdoor air containing moisture to be adsorbed by the adsorption member (22), wherein the controller (C) increases the air volume of the second fan (23) when the absolute humidity of the outdoor air is the second humidity.

In the fourth aspect, the air volume of the second fan (23) is increased when the absolute humidity of the outdoor air is the second humidity lower than the first humidity. As a result, the amount of moisture adsorbed by the adsorption member (22) can be increased under conditions where the outdoor air has relatively low humidity.

In a fifth aspect based on the fourth aspect, the controller (C) increases the air volume of the second fan (23) when the absolute humidity of the outdoor air is the second humidity, and then Then, the output of the reproducing section (25, 26) is set as the second value.

In the fifth aspect, when the absolute humidity of the outdoor air is the second humidity lower than the first humidity, the air volume of the second fan (23) is first increased. As a result, the amount of moisture adsorbed by the adsorption member (22) can be increased under conditions where the humidity of the outdoor air is relatively low. However, under conditions where the humidity of the outdoor air is relatively low, the amount of moisture adsorbed by the adsorption member (22) may not be sufficient. On the other hand, the control section (C) lowers the output of the reproducing section (25, 26), so that it is possible to prevent the output of the reproducing section (25, 26) from becoming excessive.

In a sixth aspect, in any one of the first to fifth aspects, the control unit (C) controls the target space (I) under the condition that the absolute humidity of the outdoor air is the first humidity. When there is a request to increase the amount of humidification, the output of the regeneration unit (25, 26) is set to a first value that is larger than the output when there is no request.In the sixth aspect, the humidity of the outdoor air is relatively Under high conditions, the controller (C) sets the output of the regenerator (25, 26) to a first value greater than the second value. Here, the first value when there is a request for the amount of humidification is greater than the first value when there is no request for the amount of humidification. Furthermore, under conditions where the humidity of the outdoor air is relatively high, the amount of moisture adsorbed by the adsorption member (22) also increases. Therefore, by increasing the output of the regeneration section (25, 26) in this manner, the amount of water supplied to the target space (I) increases, and the demand for increasing the amount of humidification can be met.

A seventh aspect is the sixth aspect, wherein the control unit (C) obtains the required humidification amount based on the humidity of the air in the target space (I), and determines the absolute humidity of the outdoor air and the required humidification and controlling the output of the regeneration unit (25, 26) based on the quantity.

The control section (C) of the seventh aspect controls the output of the regeneration section (25, 26) based on the humidity of the outdoor air and the required amount of humidification. This makes it possible to realize humidification control that considers the amount of moisture adsorbed by the adsorption member (22) and the required amount of humidification of the target space (I).

In an eighth aspect, in any one of the first to seventh aspects, when there is a request to increase the amount of humidification of the target space (I) and the absolute humidity of the outdoor air is the second humidity, A notification unit (41) is provided for reporting information about a decrease in humidification capacity.

In the eighth aspect, when the absolute humidity of the outdoor air is the relatively low second humidity, the control section (C) sets the output of the regeneration section (25, 26) to the relatively small second value. Therefore, wasteful consumption of energy required for regeneration of the adsorption member (22) can be suppressed. On the other hand, if the output of the regeneration section (25, 26) is reduced in this way, it may not be possible to meet the demand for increasing the amount of humidification. Therefore, in this aspect, the reporting section (41) reports information about the deterioration of the humidification capability.

In the ninth aspect, the control section (C) limits the output of the regeneration section (25, 26) so that the absolute humidity of the air in the target space (I) is equal to or less than a predetermined value.

In the ninth aspect, when the absolute humidity of the air in the target space (I) is equal to or less than a predetermined value, the control unit (C) limits the output of the regeneration unit (25, 26), so that the air is supplied to the target space (I). Condensation of moisture in the air can be suppressed.

FIG. 1 is a schematic overall configuration diagram of an air conditioner according to an embodiment. FIG. 2 is a configuration diagram showing refrigerant piping and air flow of an air conditioner. FIG. 3 is a longitudinal sectional view of the air conditioning indoor unit. FIG. 4 is a block diagram including the main elements of the air conditioner. FIG. 5 is a flow chart of humidification operation. FIG. 6 is a flowchart of the humidification operation of Modification 1. FIG. FIG. 7 is a flowchart of the humidification operation of Modification 2. FIG.

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.

Hereinafter, exemplary embodiments will be described in detail based on the drawings.

(1) Overview of Configuration of Air Conditioner The air conditioner (1) is an example of a humidifier. An air conditioner (1) regulates 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, the 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 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 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 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 Unit 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 second fan (23), a switching damper (24), a heater (25), and a first 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 second fan (23), a switching damper (24), a heater (25), and a first 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). 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 second fan (23) is arranged in the first passageway (27). The second fan (23) is rotated by driving the fourth motor (M4). The second fan (23) is configured to be able to switch the air volume in a plurality of steps by adjusting the rotational speed of the fourth motor (M4). The air conveyed by the second 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 second 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 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 an example of the regeneration section. 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 first fan (26) is arranged between the first entrance (24a) and the second entrance (24b) of the switching damper (24). The first fan (26) is rotated by driving the sixth motor (M6). The first fan (26) is configured to be able to switch the air volume in a plurality of stages by adjusting the rotation speed of the sixth motor (M6). The flow of air carried by the first 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 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). 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 passage (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 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 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 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 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 tilt angle 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).

The display section (41) is an example of a notification section. The display section (41) notifies information that the humidifying capacity is declining in the humidifying operation, which will be described later in detail.

(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 outside air temperature sensor (51) is provided in the air conditioning 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 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 in 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), an indoor controller (IC), and a remote controller (40). 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.

The outdoor temperature sensor (51) detection value and the outdoor air humidity sensor (52) detection value 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 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 the humidification rotor (22), second fan (23), switching damper (24), heater (25), and first 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 second fan (23), the switching damper (24), the first fan ( 26), and output to the heater (25). The outdoor controller (OC) controls the number of rotations of the fourth motor (M4) of the second fan (23) and the sixth motor (M6) of the first 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 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).

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 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 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) 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 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) 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 second fan (23). The control section (C) operates the first 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 second fan (23) passes through the moisture absorption area (22A) of the humidification rotor (22), and the 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 second fan (23) and operates the first 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 first 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 second fan (23) and operates the first fan (26). In the exhaust operation, the indoor air conveyed by the first fan (26) is sent to the humidification unit (20) through the hose (2), and is discharged to the outside through the 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.

(4) Control example considering the absolute humidity of the outdoor air The air conditioner (1) of this example considers the absolute humidity of the outdoor air in the humidification operation (including simultaneous operation of the humidification operation and the heating operation) described above. control.

(4-1) Problem When the humidification operation is performed under the condition that the absolute humidity of the outdoor air (hereinafter also referred to as outdoor air humidity (Ho)) is low, the moisture absorption area (22A) of the humidification rotor (22) from the second passageway (28) ) will have less moisture in the air. Under such conditions, the amount of moisture adsorbed by the adsorbent in the moisture absorption region (22A) is reduced. In this case, the amount of desorbable moisture in the moisture release area (22B) of the humidification rotor (22) also decreases. Therefore, the output of the heater (25) becomes excessive with respect to the amount of moisture that can be desorbed in the moisture release area (22B), and the power of the heater (25) may be wasted.

On the other hand, under conditions of high outside air humidity, the amount of moisture adsorbed by the adsorbent of the humidification rotor (22) increases. Under these conditions, if the output of the heater (25) is insufficient for the amount of moisture that can be desorbed in the moisture desorption area (22B), the moisture adsorbed by the humidification rotor (22) will be used to humidify the indoor space (I). may not be fully available. In addition, the energy (for example, the power of the second fan (23)) used for adsorbing moisture in the moisture release area (22B) may be wasted.

(4-2) Control Example In consideration of the above problems, the air conditioner (1) of the present embodiment performs the following control based on the outside air humidity (Ho).

As shown in FIG. 5, when the humidification operation starts, the controller (C) acquires the absolute humidity of the outdoor air in step S31. The controller (C) of this example calculates the absolute humidity of the outdoor air (outside air Humidity (Ho) is obtained.

At step S32, the controller (C) compares the outside air humidity (Ho) with the first threshold. The first threshold value is a value that determines whether the outdoor air is high humidity or low humidity. Humidity above the first threshold corresponds to the first humidity, and humidity below the first threshold corresponds to the second humidity. The first threshold is, for example, 0.0054 (kg/kg (DA). If the outside air humidity (Ho) is less than or equal to the first threshold (NO in step S32), in other words, the outside air humidity (Ho) is higher than the first humidity. If the second humidity is smaller than the second humidity, the control section (C) performs the process of step S33.

At step S33, the controller (C) sets the output of the heater (25) to the second value (30%). The second value is an output that is less than the first value, which will be described in detail below. When the outside air humidity (Ho) is the second humidity, the amount of moisture adsorbed by the adsorbent of the humidification rotor (22) decreases as described above. By reducing the output of the heater (25), it is possible to prevent the output of the heater (25) from becoming excessively large. Here, the "output of the heater (25)" corresponds to the amount of heat generated by the heater (25).

Next, in step S34, the controller (C) determines whether or not there is a request to increase the amount of humidification. Here, the request to increase the amount of humidification is, in other words, a request to increase the humidification capacity of the air conditioner (1). The condition that there is a request to increase the amount of humidification is met, for example, when the humidity detected by the inside air humidity sensor (54) is lower than the set humidity (target humidity) input to the remote controller (40).

In step S34, when the control section (C) determines that there is a request to increase the amount of humidification, in step S35, the display section (41) of the remote controller (40) notifies the user of information indicating that the humidification capacity has decreased. do. Specifically, the display section (41) displays information indicating that the humidification capacity is declining using characters, graphics, icons, and the like. Information indicating that the humidification capability is declining includes, for example, that it takes time to humidify the target space and that the humidity of the outdoor air is low.

If the output of the heater (25) is made relatively small in step S33, the request for increasing the amount of humidification cannot be sufficiently met. Since the user can be informed of this by the reporting unit (41), the user can be prevented from misunderstanding that something is wrong with the air conditioner (1) and from being dissatisfied with the current humidification capacity. can.

In step S32, if the outside air humidity (Ho) is higher than the first threshold (YES in step S32), in other words, if the outside air humidity (Ho) is the first humidity higher than the second humidity, the control unit (C) performs the processing of step S36.

In step S36, when the controller (C) determines that there is no request to increase the amount of humidification, in step S37, the controller (C) sets the output of the heater (25) to a predetermined value that is a first value larger than the second value. Let it be the output (for example, 70%). When the outside air humidity (Ho) is higher than the first threshold, the amount of moisture adsorbed by the adsorbent of the humidification rotor (22) is large. Therefore, even if the output of the heater (25) is greater than the second value, it is possible to prevent the output of the heater (25) from becoming excessive. In other words, the output of the heater (25) can be efficiently used to humidify the target space (I).

In step S36, when the controller (C) determines that there is a request to increase the amount of humidification, in step S38, the controller (C) sets the output of the heater (25) to a predetermined value that is a first value larger than the second value. Output (for example, 100%). When the outside air humidity is the first humidity and there is a request to increase the amount of humidification, the control section (C) changes the output of the heater (25) to the heater ( 25) to a first value (eg, 100%) that is greater than the output (eg, 70%).

Under the condition that the outside air humidity (Ho) is higher than the first threshold, the outside air is highly humid and the amount of water adsorbed by the adsorbent of the humidification rotor (22) is large. Therefore, by setting the output of the heater (25) higher than the output when there is no request to increase the amount of humidification, the moisture adsorbed by the adsorbent can be sufficiently desorbed. As a result, air containing a large amount of moisture can be supplied to the indoor space (I), and a demand for increasing the amount of humidification can be quickly met. In particular, in this example, since the output of the heater (25) is set to the maximum output, this effect becomes remarkable.

(5) Features (5-1)
An air conditioner (1) includes a humidification rotor (22) that adsorbs moisture in outdoor air, a heater (25) that desorbs moisture supplied to an indoor space (I) from the humidification rotor (22), and outdoor air. When the absolute humidity of the outdoor air is the first humidity, the output of the heater (25) is set to the first value, and when the absolute humidity of the outdoor air is the second humidity lower than the first humidity, the output of the heater (25) is set to the first value. and a control unit (C) for setting a second value smaller than the first value.

Specifically, when the outside air humidity (Ho) is the second humidity and the amount of water adsorbed by the humidification rotor (22) is small, in step S33, the control section (C) reduces the output of the heater (25). A first value (for example, 30%) smaller than the second value is set. Therefore, it is possible to prevent the output of the heater (25) from becoming excessive with respect to the amount of moisture that can be desorbed from the humidification rotor (22). Therefore, wasteful consumption of energy required for regeneration of the humidification rotor (22) can be suppressed.

When the outside air humidity (Ho) is the first humidity and the amount of water adsorbed by the humidification rotor (22) is small, in step S34, the control section (C) increases the output of the heater (25) to a value greater than the first value. A second value (for example, 70% at step S37 or 100% at step S38). Therefore, it is possible to prevent the output of the heater (25) from becoming insufficient with respect to the moisture adsorbed on the humidification rotor (22). Therefore, the moisture adsorbed on the humidification rotor (22) can be fully utilized for humidification of the indoor space (I). It is possible to suppress wasteful consumption of electric power (for example, the power of the second fan (23)) that is consumed to cause the humidification rotor (22) to adsorb moisture.

(5-2)
When there is a request to increase the amount of humidification of the indoor space (I) under the condition that the absolute humidity of the outdoor air is the first humidity, the control unit (C) changes the output of the heater (25) when there is no request. A first value greater than the output of .

Specifically, if there is a request to increase the amount of humidification under the condition that the absolute humidity of the outdoor air is the first humidity (YES in step S36), the control unit (C) does not request to increase the amount of humidification. The output of the heater (25) is increased (step S38) compared to the case (NO in step S36). As a result, when there is a demand to increase the amount of humidification, a sufficient amount of moisture adsorbed by the humidification rotor (22) can be used to humidify the indoor space (I). As a result, it is possible to quickly meet the demand for increasing the amount of humidification.

(5-3)
An air conditioner (1) notifies information about a decrease in humidification capacity when there is a request to increase the amount of humidification in the target space (I) and the absolute humidity of the outdoor air is the second humidity. A reporting unit (41) is provided.

If the output of the heater (25) is lowered in step S33, it may not be possible to sufficiently meet the demand for increasing the amount of humidification. In this case, the display section (41), which is a notification section, notifies the user or the like that the humidification capacity is declining. As a result, it is possible to prevent the user from misunderstanding that something is wrong with the air conditioner (1) or from being dissatisfied with the current humidification capability.

(6) Modifications In the embodiment described above, the following modifications may be adopted. In the following description, points different from the above-described embodiment will be described.

(6-1) Modification 1
In Modified Example 1, when the outside air humidity (Ho) is the second humidity, the control section (C) first increases the air volume of the second fan (23), and then increases the output of the regeneration section (25, 26). 2nd value. An example of control according to modification 1 is shown in FIG.

When the outside air humidity (Ho) is equal to or lower than the first threshold (NO in step S32), in step S41, the controller (C) increases the air volume of the second fan (23) by a predetermined amount. In other words, in step S41, the controller (C) increases the rotation speed of the fourth motor (M4) of the second fan (23). As the air volume of the second fan (23) increases, the amount of moisture adsorbed by the adsorbent of the humidification rotor (22) increases.

Next, in step S42, the controller (C) determines whether or not the output of the heater (25) is excessive. It is based on the air volume of the first fan (26), the output of the heater (25), the required amount of humidification of the indoor space (I), and the like. The required amount of humidification of the indoor space (I) is calculated based on the set humidity (target humidity) input to the remote controller (40) and the inside air humidity detected by the inside air humidity sensor (54).

When it is determined in step S42 that the output of the heater (25) is not excessive, the controller (C) sets the output of the heater (25) to a first value larger than the second value. In this example, the process proceeds to step S37, for example, and the control unit (C) sets the output of the reproducing unit (25, 26) to 70%, which is the first value. Instead of step S37, the control section (C) may adjust the output of the heater (25) so that the required amount of humidification can be processed.

When it is determined in step S42 that the output of the heater (25) is excessive, the control section (C) performs the processing of step S43. In step S43, the control section (C) determines whether the air volume of the second fan (23) is maximum. If the air volume of the second fan (23) is not the maximum, the controller (C) increases the air volume of the second fan (23) in step 41. In step S43, when the air volume of the second fan (23) is maximum, it can be determined that the output of the heater (25) is still excessive even if the air volume of the second fan (23) is maximized. Therefore, in step S44, the controller (C) sets the output of the heater (25) to a second value (for example, 40%) smaller than the first value. In step S44, the controller (C) preferably increases the second value as the air volume of the second fan (23) increases. This is because the amount of moisture adsorbed by the adsorbent of the humidification rotor (22) increases as the air volume of the second fan (23) increases.

As described above, in Modification 1, when the outside air humidity (Ho) is the second humidity, first, the air volume of the second fan (23) is increased. As a result, the amount of moisture that can be adsorbed by the humidification rotor (22) can be increased, so that the output of the heater (25) can be prevented from becoming excessive. In particular, in this example, this effect becomes remarkable by maximizing the air volume of the second fan (23).

After that, the control unit (C) sets the output of the heater (25) to the second value when the output of the heater (25) becomes excessive despite the maximum air volume of the second fan (23). do. Therefore, it is possible to prevent insufficient humidification of the indoor space (I) due to a decrease in output of the heater (25).

(6-2) Modification 2
In Modified Example 2, the controller (C) forcibly turns on the heater ( 25) limit the output. An example of control according to modification 2 is shown in FIG.

At step S51 in FIG. 7, the control unit (C) determines whether the inside air humidity (Hi) is greater than the second threshold. Here, the second threshold is a predetermined value set to suppress condensation of moisture in the air flowing through the hose (2) and the interior of the air conditioning indoor unit (30). Inside air humidity (Hi) is detected by an inside air humidity sensor (54).

In step S51, if the inside air humidity (Hi) is greater than the second threshold, in step S52, the controller (C) limits the output of the heater (25) to a predetermined value or less. This reduces the humidity of the air supplied from the humidification rotor (22) to the target space (I). Therefore, condensation of moisture in the air flowing through the hose (2) and the interior of the air conditioning indoor unit (30) can be suppressed.

(6-3) Modification 3
In Modified Example 3, the control section (C) controls the output of the heater (25) based on the outside air humidity (Ho) and the required humidification amount. For example, when the outside air humidity (Ho) is as low as the second humidity and the amount of moisture adsorbed by the humidification rotor (22) alone cannot satisfy the required amount of humidification, the control section (C) reduces the output of the heater (25). A second value (eg, 30%) is used. On the other hand, if the outside air humidity (Ho) is as low as the second humidity, but the required humidification amount can still be satisfied, the controller (C) outputs the output of the heater (25) when the required humidification amount cannot be satisfied. A second value (for example, 40%) that is greater than the output of the heater (25).

The control unit (C) of Modification 3 may adjust the first value larger than the second value according to the necessary humidification amount when the outside air humidity (Ho) is as high as the first humidity.

(7) Other Embodiments The regeneration unit of the embodiment is a heater (25). The regeneration section may include a first fan (26), and the control section (C) may control the output of the regeneration section by adjusting the air volume of the first fan (26).

The adsorption member of the embodiment is a humidification rotor (22) having an adsorbent. The adsorption member may be an adsorption element supporting an adsorbent, or a heat exchanger (adsorption heat exchanger) supporting an adsorbent. The adsorption heat exchanger desorbs moisture from the adsorbent by heating the adsorbent with a refrigerant or heat medium flowing inside.

The notification unit of the embodiment is the display unit (41). The notification unit may be a sound generating unit that uses sound to notify that the humidifying ability is declining, or a light emitting unit that uses light to notify that the humidifying ability is declining.

Although the embodiments and modifications have been described above, it will be understood that various changes in form and details are possible without departing from the spirit and scope of the claims. In addition, the above embodiments, modifications, and other embodiments may be appropriately combined or replaced as long as the functions of the object of the present disclosure are not impaired.

The descriptions of "first", "second", "third", etc. described above are used to distinguish the words and phrases to which these descriptions are given, and the number and order of the words and phrases are also limited. not something to do.

As described above, the present disclosure is useful for humidifiers.

C control unit 1 air conditioner (humidifier)
22 humidification rotor (adsorption member)
23 second fan 25 heater (regeneration unit)
26 1st fan (playback part)

Claims

an adsorption member (22) that adsorbs moisture in outdoor air;
a regeneration unit (25, 26) for desorbing moisture supplied to the target space (I) from the adsorption member (22);
When the absolute humidity of the outdoor air is the first humidity, the output of the regeneration unit (25, 26) is set to the first value, and when the absolute humidity of the outdoor air is the second humidity lower than the first humidity. and a control section (C) for setting the output of the regeneration section (25, 26) to a second value smaller than the first value.
The humidifying device according to claim 1, wherein the regeneration unit includes a heater (25).
The humidifier according to claim 1 or 2, wherein the regeneration unit includes a first fan (26) that conveys air containing moisture desorbed from the adsorption member (22) to the target space (I).
a second fan (23) for conveying outdoor air containing moisture to be adsorbed by the adsorption member (22);
The humidifier according to any one of claims 1 to 3, wherein the control unit (C) increases the air volume of the second fan (23) when the absolute humidity of the outdoor air is the second humidity. Device.
The control section (C) increases the air volume of the second fan (23) when the absolute humidity of the outdoor air is the second humidity, and then increases the output of the regeneration section (25, 26). The humidifier according to claim 4, wherein said second value is used.
When there is a request to increase the amount of humidification of the target space (I) under the condition that the absolute humidity of the outdoor air is the first humidity, the control unit (C) controls the regeneration unit (25, 26). The humidifier according to any one of claims 1 to 5, wherein the output is set to a first value that is greater than the output when there is no request.
The control unit (C) obtains the required amount of humidification based on the humidity of the air in the target space (I),
The humidifying device according to any one of claims 1 to 6, wherein the output of the regeneration section (25, 26) is controlled based on the absolute humidity of the outdoor air and the required amount of humidification.
a notification unit (41) for notifying information about a decrease in humidification capacity when there is a request to increase the amount of humidification of the target space (I) and the absolute humidity of the outdoor air is the second humidity; The humidifying device according to any one of claims 1 to 7, comprising:
Any one of claims 1 to 8, wherein the control section (C) limits the output of the regeneration section (25, 26) so that the absolute humidity of the air in the target space (I) is equal to or less than a predetermined value. The humidifying device according to 1.