JP7146063B2 - air conditioner - Google Patents

Description

The present invention relates to an air conditioner.

Some air conditioners have a dew condensation prevention operation function for preventing dew condensation from occurring on windows. In Patent Document 1, a corrected indoor temperature is obtained by correcting the indoor temperature according to the opening/closing state of the curtain, and the state of condensation occurrence is determined based on the indoor humidity, the corrected indoor temperature, and the outdoor temperature, so that the dew point temperature does not fall below the dew point temperature. The dehumidifying operation is performed toward the position of the window.

JP 2013-47583 A

Patent Literature 1 describes dew condensation prevention control for an air conditioner having one outlet, but does not show dew condensation prevention control for an air conditioner having a plurality of outlets.

The present invention has been made in view of the above, and provides an air conditioner having a plurality of air outlets, which can prevent condensation on windows while appropriately maintaining indoor temperature and humidity. with the aim of obtaining

In order to solve the above-described problems and achieve the object, an air conditioner according to the present invention includes an outdoor unit and a first indoor unit connected to the outdoor unit, wherein the outdoor unit and the first indoor unit are connected to the outdoor unit. An air conditioner that air-conditions an indoor space having a window separating the interior and the exterior by one indoor unit, wherein the outdoor unit includes an outdoor temperature detection unit that detects an outdoor temperature, and the first indoor unit is a first indoor unit housing having a plurality of air outlets for blowing out air in a plurality of directions; and a first window position for detecting the position of the window. a detector, a first indoor temperature detector that detects the temperature of the indoor space, and a first occupant detector that detects whether or not a person is between the window and the first indoor unit housing. based on the temperature and humidity of the indoor space detected by the unit , a first indoor humidity detection unit that detects the humidity of the indoor space, the first indoor temperature detection unit, and the first indoor humidity detection unit calculating the dew point temperature of the indoor space, and determining the state of condensation on the window based on the calculated dew point temperature and the outside air temperature; a classification unit that classifies the plurality of outlets into a first outlet that is a target of dew condensation prevention control for the window and a second outlet that is a target of the dew condensation prevention control. and when the first dew condensation determination unit determines that the window is in a dew condensation state and the first occupant detection unit does not detect any occupants, the dehumidifying operation is performed. and controlling the air direction switching unit of the first outlet to blow air toward the window, and the switching state before it is determined that the dew condensation is occurring. and controlling the wind direction switching unit of the second outlet so that the airflow direction is continued, and the first dew condensation determination unit determines that the window is in a dew condensation state. is detected, the air conditioner is determined to be in operation, and a person is detected by the first presence detection unit, a first period of time elapses and controlling the outdoor unit to continue the operating state before it was determined that the dew condensation occurred; and preventing the wind from hitting the detected person. The second control unit controls the airflow direction switching unit of the air outlet of No. 1 so as to continue the switching state before it is determined that the dew condensation is occurring. and a first air conditioning control unit that performs a second operation including controlling the wind direction switching unit of the outlet .

ADVANTAGE OF THE INVENTION The air conditioner concerning this invention is effective in the ability to implement|achieve dew condensation prevention of a window, maintaining indoor temperature and humidity appropriately.

1 is a block diagram showing a configuration example of an air conditioner according to an embodiment; FIG. 2 is a diagram showing an appearance example of an indoor unit of an air conditioner according to an embodiment; Flowchart showing an example of dew condensation prevention control operation of the air conditioner according to the embodiment Flowchart showing an operation example of dew condensation prevention operation A Flowchart showing an operation example of dew condensation prevention operation B Flowchart showing an example of dew condensation prevention operation C

Air conditioners according to embodiments of the present invention will be described in detail below with reference to the drawings. In addition, this invention is not limited by this embodiment.

Embodiment.
In the present embodiment, in an air conditioner that air-conditions an indoor space having a window that separates the room from the outside, condensation prevention that prevents condensation on the indoor surface of the window during the cold season when the indoor temperature is higher than the outdoor temperature Enforce controls.

FIG. 1 is a block diagram showing a control configuration example of an air conditioner according to an embodiment. As shown in FIG. 1, the air conditioner according to the embodiment includes a remote controller (remote controller) 1, two indoor units 2 and 3, and one outdoor unit 4 connected to the indoor units 2 and 3. I have. The indoor units 2 and 3 have the same internal configuration.

The indoor units 2 and 3 and the outdoor unit 4 are connected by refrigerant pipes, internal/external communication lines, and the like. The air conditioner forms one complete refrigeration cycle with the indoor units 2 and 3 and the outdoor unit 4 . The air conditioner uses refrigerant circulating between the indoor units 2 and 3 and the outdoor unit 4 through refrigerant pipes to transfer heat between the air in the indoor space, which is the space to be air-conditioned, and the outdoor air. Air conditioning is realized by executing heating operation, cooling operation, dehumidifying operation, etc. for the indoor space. FIG. 1 shows only the configuration related to dew condensation prevention control of the air conditioner, and omits illustration of various components such as a refrigeration cycle mechanism including a blower fan, a compressor, and the like.

FIG. 2 is a diagram showing an example of the appearance of the indoor unit 2 of the air conditioner according to the embodiment, and FIG. 2 is a bottom view of the indoor unit 2 attached to the ceiling. The outdoor unit 4 also has a similar external configuration. As shown in FIG. 2, the housing 30 of the ceiling-mounted indoor unit 2 is embedded in the ceiling with its polygonal lower surface exposed to the inside of the room. A plurality of outlets 25 are arranged on the outer peripheral side of the lower surface of the housing 30 .

In this embodiment, the housing 30 has a rectangular shape, and four rectangular outlets 25 extending along the outer circumference are arranged. Further, each outlet 25 is provided with an upper and lower vane 22 and a left and right louver 24 as a wind direction switching portion capable of switching the wind direction and opening/closing. In FIG. 2, the left and right louvers 24 installed on one outlet 25 are shown shifted rightward and enlarged for the sake of convenience. By controlling the angle of inclination of the upper and lower vanes 22, the opening and closing of the outlet 25 and the wind direction in the vertical direction are controlled. By controlling the inclination angle of the left and right louvers 24, the wind direction in the left and right direction is controlled. The upper and lower vanes 22 and the left and right louvers 24 arranged at the four outlets 25 are driven independently.

The housing 30 is provided with an indoor temperature sensor 20 for detecting temperature and an indoor humidity sensor 21 for detecting humidity. Further, the housing 30 has a thermopile for measuring the temperature distribution in the indoor space in order to detect the position of the windows in the indoor space in which the indoor units 2 and 3 are installed and to detect the presence of a human body near the windows. A sensor 23 is provided. The thermopile sensor 23 divides the indoor space to be measured into a plurality of areas and measures the temperature distribution of each divided area. Any sensor other than the thermopile sensor 23 may be used as long as the window position and the human body can be measured.

Returning to FIG. 1, the control configuration of the air conditioner will be described. The outdoor unit 4 includes an outdoor temperature detection unit 401 that detects the outdoor temperature, and an indoor/outdoor communication unit 402 that communicates with the indoor unit 2 .

The indoor unit 2 includes a thermopile sensor 23, an indoor temperature sensor 20, an indoor humidity sensor 21, an occupant detection unit 201, a window position detection unit 202, an indoor temperature detection unit 203, an indoor humidity detection unit 204, It includes an indoor/outdoor communication unit 205 , an outlet classification unit 206 , a dew point temperature calculation unit 207 , a wind direction determination unit 208 , a dew condensation generation determination unit 209 , and an air conditioning control unit 210 .

The indoor temperature detector 203 detects the temperature of the indoor space based on the detection data of the indoor temperature sensor 20 . The indoor humidity detection unit 204 detects the humidity of the indoor space based on the detection data of the indoor humidity sensor 21 . The indoor/outdoor communication unit 205 communicates with the outdoor unit 4 . The indoor/outdoor communication unit 205 acquires the outdoor temperature from the outdoor unit 4 . The dew point temperature calculator 207 calculates the indoor dew point temperature based on the indoor temperature and the indoor humidity. The dew condensation determination unit 209 determines whether dew condensation occurs on the indoor side of the window based on the calculated indoor dew point temperature and outdoor temperature. Condensation generation determination unit 209 outputs the determination result to air conditioning control unit 210 .

The window position detector 202 detects the position of the window based on the measurement data of the thermopile sensor 23 . In the cold season when dew condensation prevention control is performed, the temperature of the window and the vicinity of the window is generally the lowest in the indoor space. Therefore, for example, the lowest temperature position is detected as the window position. That is, the window position detection unit 202 detects the position of one to a plurality of divided areas with the lowest temperature as the position of the window based on the temperature distribution of the plurality of divided areas in the thermopile sensor 23 .

Based on the measurement data of the thermopile sensor 23, the occupant detection unit 201 detects whether the vicinity of the window is occupied or absent. In other words, the presence detection unit 201 determines whether or not there is a person between the housing 30 of the indoor unit 2 and the detected window position.

The outlet classification unit 206 stores the window positions detected by the window position detection unit 202, and classifies the four outlets 25 into windows based on the relationship between the stored window positions and the positions of the four outlets 25. are classified into a first group of outlets that are subject to dew condensation prevention control and a second group of outlets that are not subject to dew condensation prevention control. The first group of outlets corresponds to the first outlet in the claims. The second group of outlets corresponds to the second outlet in the claims. For example, one or more outlets 25 close to the divided area recognized as the window position are assigned to the first group of outlets, and the others are assigned to the second group of outlets. If multiple windows are detected, each window is assigned a first group of outlets and a second group of outlets. The outlet classification unit 206 stores, for each window, classification data indicating the corresponding relationship between the windows and the outlets of the first group and the outlets of the second group.

Based on the classification data stored in the outlet classification section 206 and the position of the windows, the airflow direction determination section 208 determines the airflow directions of the four outlets 25 of the indoor unit 2 during dew condensation prevention operation. The airflow direction determining unit 208 determines the set angles of the upper and lower vanes 22 and the left and right louvers 24 so that the airflow directly hits the windows for the first group of air outlets to be subjected to dew condensation prevention control. The wind direction determination unit 208 determines the set angles of the upper and lower vanes 22 and the left and right louvers 24 according to the situation for the outlets of the second group that are not subject to dew condensation prevention control.

When the occurrence of dew condensation is detected, the air conditioning control unit 210 instructs the outdoor unit 4 to perform dehumidifying operation, and the upper and lower vanes 22 of the four outlets 25 are adjusted so that the wind direction determined by the wind direction determination unit 208 is achieved. and controls the left and right louvers 24 to perform the dehumidifying operation.

The air conditioner of FIG. 1 includes two indoor units 2 and 3, but the indoor unit whose window is detected by the window position detection unit 202 and the indoor unit whose window is not detected by the window position detection unit 202 , different anti-condensation control is performed.

The remote controller 1 has a function of transmitting commands for setting the indoor units 2 and 3 to the indoor units 2 by user's operation. In this embodiment, the dew condensation prevention control function is set to ON for the indoor units 2 and 3 by the user using the remote controller 1 to turn on the dew condensation prevention operation function. When the dew condensation prevention control function of the indoor units 2 and 3 is turned on, the dew condensation generation state is always determined even when the operation of the air conditioner is stopped, and the dew condensation prevention operation is executed according to the determination result.

Next, dew condensation prevention control processing in the air conditioner according to the embodiment will be described with reference to FIGS. 3 to 6. FIG. FIG. 3 is a flowchart showing dew condensation prevention control performed in the indoor unit. Since the air conditioner shown in FIG. 1 has two indoor units 2 and 3, the indoor units 2 and 3 each perform dew condensation prevention control shown in FIG. FIG. 4 is a flow chart showing an operation example of dew condensation prevention operation A, which is dew condensation prevention operation when the vehicle is unattended. FIG. 5 is a flow chart showing an operation example of the dew condensation prevention operation B, which is the dew condensation prevention operation until the first time T elapses when the person is occupied. FIG. 6 is a flow chart showing an operation example of the dew condensation prevention operation C, which is the dew condensation prevention operation after the first time T has passed while the person is present. The condensation prevention operation A corresponds to the first operation in the claims, the condensation prevention operation B corresponds to the second operation and the third operation in the claims, and the condensation prevention operation C corresponds to the fourth operation in the claims. for driving.

In the air conditioner according to the present embodiment, during normal operation such as heating operation, cooling operation, dehumidifying operation, or air blowing operation, or during operation stop, the dew condensation prevention function setting ON of the air conditioner is received from the remote controller 1. Thus, dew condensation prevention control is executed. The on state of the dew condensation prevention function setting is maintained unless the user turns off the dew condensation prevention function setting or the dew condensation prevention function setting is initialized.

As an initial process, the window position detector 202 of the indoor unit 2 detects the window position using the measurement data of the thermopile sensor 23 (ST101). The window position detector 202 of the indoor unit 2 determines whether or not the window position has been detected (ST102). If the window position is not detected (ST102: NO), the subsequent processing from ST103 to ST105 is not executed.

If a window position is detected (ST102: YES), the outlet classification unit 206 stores the detected window position (ST103), and based on the relationship between the window position and the positions of the four outlets 25, 4 The outlets 25 are classified into a first group of outlets that are subject to dew condensation prevention control for windows and a second group of outlets that are not subject to dew condensation prevention control, and the classification data is generated. Store (ST104).

Based on the classification data and the position of the window, the wind direction determining unit 208 determines the set angles of the upper and lower vanes 22 and the left and right louvers 24 of the outlets of the first group so that the wind directly hits the windows (ST105).

Subsequently, the air-conditioning control unit 210 of the indoor unit 2 determines whether or not the user has received the dew condensation prevention function setting ON from the remote controller 1 (ST106). If the dew condensation prevention function setting ON command has not been received (ST106: NO), the dew condensation prevention control processing ends. When the dew condensation prevention function setting ON has been received from the remote controller 1 (ST106: YES), the air conditioning control section 210 of the indoor unit 2 starts dew condensation prevention control processing. The indoor temperature detector 203 of the indoor unit 2 detects the temperature of the indoor space based on the detection data of the indoor temperature sensor 20 . The indoor humidity detector 204 detects the humidity of the indoor space based on the detection data of the indoor humidity sensor 21 (ST107). The dew point temperature calculator 207 calculates the indoor dew point temperature based on the indoor temperature and indoor humidity (ST108). The dew condensation occurrence determination unit 209 determines whether dew condensation occurs on the indoor surface of the window based on the indoor dew point temperature and the outside air temperature acquired from the outside air temperature detection unit 401 of the outdoor unit 4 (ST109).

When dew condensation has not occurred (ST109: NO), the dew condensation occurrence determination unit 209 determines whether any of dew condensation prevention operations A, B, and C described later is being executed (ST120), and dew condensation is detected. If any one of the prevention operations A, B, and C is being executed (ST120: YES), the dew condensation prevention operation being executed is stopped (ST130), and then the procedure is shifted to ST107. In ST120, if dew condensation prevention operation A, B, or C is not being executed (ST120: NO), the procedure proceeds to ST107.

When the dew condensation generation determination unit 209 determines that dew condensation has occurred on the inner surface of the window (ST109: YES), the occupant detection unit 201 determines whether there is a person in the area between the window and the indoor unit. (ST110). When the occupant detection unit 201 determines that no occupant is present (ST111: NO), the air conditioning control unit 210 executes dew condensation prevention operation A (ST116).

When the occupant detection unit 201 determines that there is an occupant (ST111: YES), the air conditioning control unit 210 starts counting the occupied state timer, which is a built-in timer (ST112). The air-conditioning control unit 210 determines whether or not the set first time has passed (ST113), and during the period when the first time has not passed (ST113: NO), the dew condensation prevention operation B is executed. (ST115).

Air-conditioning control unit 210 executes dew condensation prevention operation C for a period after the first period of time has passed (ST113: YES) (ST114). When dew condensation prevention operation A or dew condensation prevention operation C ends, the control procedure proceeds to ST107.

FIG. 4 is a flow chart showing the details of dew condensation prevention operation A that is executed when there is no person in the area up to the window. In dew condensation prevention operation A, air conditioning control unit 210 determines whether or not its own indoor unit is an indoor unit subject to dew condensation prevention control (ST200). In ST102 of FIG. 3, if the window can be detected, the air conditioning control unit 210 determines that the own indoor unit is the indoor unit subject to dew condensation prevention control. Further, when the window cannot be detected, it is determined that the own indoor unit is not subject to dew condensation prevention control. If the own indoor unit is determined to be the indoor unit subject to dew condensation prevention control (ST200: YES), the air conditioning control unit 210 instructs the outdoor unit 4 and each unit of the own indoor unit to perform the dehumidification operation ( ST210).

In addition, the air conditioning control unit 210 determines in ST105 of FIG. 3 (ST220: YES) the first group of outlets to be subjected to dew condensation prevention control among the four outlets 25 of the indoor unit. The upper and lower vanes 22 and the left and right louvers 24 are controlled so as to obtain the set angle (ST240). As a result, the dehumidifying air can be blown toward the windows from the outlets of the first group.

The air-conditioning control unit 210 executes dew condensation prevention operation A for the second group of outlets that are not subject to dew condensation prevention control among the four outlets 25 of the indoor unit (ST220: NO). The upper and lower vanes 22 and the left and right louvers 24 are controlled so that the opening and closing of the front outlet 25 and the wind direction state are continued (ST230). For example, if the previous state was the closed state, the closed state is maintained, and if the previous state was the angle α of the upper and lower vanes 22 and the angle β of the left and right louvers 24, these angular states are maintained.

When it is determined in ST200 that the own indoor unit is not subject to dew condensation prevention control (ST200: NO), the air conditioning control unit 210 performs dew condensation prevention operation A for the four outlets 25 of the own indoor unit. The upper and lower vanes 22 and the left and right louvers 24 are controlled so as to continue the opening/closing of the outlet and the wind direction state before execution (ST230).

FIG. 5 is a flow chart showing the details of dew condensation prevention operation B which is executed until the first time period has passed and there is a person in the area up to the window. In dew condensation prevention operation B, air conditioning control unit 210 determines whether or not its own indoor unit is subject to dew condensation prevention control (ST300). When it is determined that the indoor unit is subject to dew condensation prevention control (ST300: YES), the air conditioning control unit 210 determines whether the air conditioner is in operation or stopped (waiting for operation). (ST310). If the air conditioner is out of operation (ST310: YES), the air conditioning control section 210 instructs each section of the outdoor unit 4 and the own indoor unit to perform the dehumidifying operation (ST320). When the operation of the air conditioner is not stopped (ST310: NO), the air conditioning control unit 210 instructs each part of the outdoor unit 4 and the own indoor unit to continue the operation state before the dew condensation prevention operation B was executed. instruct (ST330). For example, if the previous operation was the heating operation, the instruction is given to continue the heating operation.

Further, the air conditioning control unit 210 sets the first group of outlets to be subjected to dew condensation prevention control among the four outlets 25 of the indoor unit (ST340: YES) so that the air direction is not directed to the person. The upper and lower vanes 22 and the left and right louvers 24 are controlled to form an angle (ST360). As a result, the air in the dehumidifying operation or other operation is blown out from the outlets of the first group in a direction that avoids people.

The air-conditioning control unit 210 executes dew condensation prevention operation B for the outlets of the second group, which are outlets not subject to dew condensation prevention control among the four outlets 25 of the indoor unit (ST340: NO). The upper and lower vanes 22 and the left and right louvers 24 are controlled so that the opening and closing of the previous outlet and the wind direction are continued (ST350). For example, if the previous state was the closed state, the closed state is maintained, and if the previous state was the angle α of the upper and lower vanes 22 and the angle β of the left and right louvers 24, these angular states are maintained.

When it is determined in ST300 that the indoor unit is not subject to dew condensation prevention control (ST300: NO), the air conditioning control unit 210 performs dew condensation prevention operation B for the four outlets 25 of the indoor unit. The upper and lower vanes 22 and the left and right louvers 24 are controlled so as to continue the opening/closing of the outlet and the wind direction state before execution (ST350).

FIG. 6 is a flow chart showing the details of the dew condensation prevention operation C that is executed during a period after the first period of time when there is an occupant in the area up to the window. In dew condensation prevention operation C, air conditioning control unit 210 determines whether or not its own indoor unit is subject to dew condensation prevention control (ST400). If the own indoor unit is determined to be the indoor unit subject to dew condensation prevention control (ST400: YES), the air conditioning control unit 210 instructs the outdoor unit 4 and each unit of the own indoor unit to perform the dehumidification operation ( ST410).

The air-conditioning control unit 210 sets the air direction angle at which the air does not hit the person for the first group of air outlets, which are the air outlets to be subjected to dew condensation prevention control, out of the four air outlets 25 of the indoor unit (ST420: YES). The upper and lower vanes 22 and the left and right louvers 24 are controlled (ST440). As a result, air for dehumidifying operation is blown out from the outlets of the first group in a wind direction that avoids people.

The air-conditioning control unit 210 moves the upper and lower vanes so that the outlets of the second group, which are not subject to dew condensation prevention control among the four outlets 25 of the indoor unit (ST420: NO), are in an open state. 22 and left and right louvers 24 (ST430). The angles of the upper and lower vanes 22 and the left and right louvers 24 at the outlets of the second group are controlled so as to efficiently dehumidify near the windows in the indoor section, or are controlled so as to swing. As a result, the dehumidifying operation is performed using all the outlets of the indoor units subject to dew condensation prevention control.

When it is determined in ST400 that the own indoor unit is not subject to dew condensation prevention control (ST400: NO), the air conditioning control unit 210 opens the four outlets 25 of the own indoor unit. Then, the upper and lower vanes 22 and the left and right louvers 24 are controlled (ST430). The angles of the upper and lower vanes 22 and the left and right louvers 24 at the air outlets of the indoor units that are not subject to dew condensation prevention control are controlled so as to efficiently dehumidify near the windows in the indoor section, or are controlled to swing. . As a result, the dehumidifying operation is performed using the outlets of all the indoor units installed in the indoor space.

During execution of such dew condensation prevention operation A, B or C, the indoor temperature detection unit 203 detects the indoor temperature, the indoor humidity detection unit 204 detects the indoor humidity (ST107), and the outdoor temperature detection unit 401 detects the outdoor temperature. The temperature is detected, the dew point temperature is calculated from the detected data (ST108), and it is determined whether condensation occurs on the window (ST109). Then, any one of the dew condensation prevention operations A, B and C is executed until it is determined that no dew condensation has occurred.

In this embodiment, when the dew condensation prevention operation function is turned on by the remote controller 1, the dew condensation prevention control shown in FIGS. 3 to 6 is executed. This dew condensation prevention control is executed not only when the air conditioner is in operation, but also when it is stopped.

For example, regarding dew condensation prevention operation A, B, or C when the dew condensation prevention operation function is set to ON by the remote controller 1 while the air conditioner is performing the heating operation, and the dew condensation occurrence determination unit 209 determines that dew condensation has occurred. explain. It is assumed that the indoor unit 2 is the indoor unit subject to dew condensation prevention control, and the indoor unit 3 is the indoor unit not subject to dew condensation prevention control.
In the dew condensation prevention operation A, the air conditioner is switched from the heating operation to the dehumidification operation, and the upper and lower vanes of the first group outlet of the indoor unit 2 subject to the dew condensation prevention control are blown toward the windows. 22 and left and right louvers 24 are controlled, and the state of the outlets during heating is maintained as is for the outlets of the second group in the indoor unit 2 subject to dew condensation prevention control. In the indoor units 3 that are not subject to dew condensation prevention control, the state of the air outlet during heating is maintained as it is.
In the dew condensation prevention operation B, the air conditioner is switched from the heating operation to the dehumidification operation, and the upper and lower vanes of the first group outlet of the indoor unit 2 subject to dew condensation prevention control are adjusted so as to avoid people. 22 and left and right louvers 24 are controlled, and the state of the outlets during heating is maintained as is for the outlets of the second group in the indoor unit 2 subject to dew condensation prevention control. In the indoor units 3 that are not subject to dew condensation prevention control, the state of the blowout port that is open during heating is maintained as it is.
In the dew condensation prevention operation C, the air conditioner performs the dehumidification operation, and the first group outlets of the indoor units 2 subject to dew condensation prevention control are arranged with the upper and lower vanes 22 and the left and right vanes 22 so as to avoid people. The louvers 24 are controlled, and the outlets of the second group in the indoor unit 2 subject to dew condensation prevention control are kept open during heating. In the indoor units 3 that are not subject to dew condensation prevention control, the state of the blowout port that is open during heating is maintained as it is.

Next, dew condensation prevention operation A, B, or C will be described when the dew condensation prevention operation function is set to ON by the remote controller 1 while the operation of the air conditioner is stopped, and the dew condensation occurrence determination unit 209 determines that dew condensation has occurred. do. It is assumed that the indoor unit 2 is the indoor unit subject to dew condensation prevention control, and the indoor unit 3 is the indoor unit not subject to dew condensation prevention control.
In the dew condensation prevention operation A, the air conditioner is switched from the stop to the dehumidification operation, and the upper and lower vanes 22 for the outlets of the first group in the indoor unit 2 subject to dew condensation prevention control are blown toward the windows. and the left and right louvers 24 are controlled, and the outlets of the second group in the indoor unit 2 subject to dew condensation prevention control are maintained in the closed state during stop. Even in the indoor unit 3 that is not subject to dew condensation prevention control, the closed state of the outlet while stopped is maintained as it is.
In the dew condensation prevention operation B, the air conditioner is switched from the stop to the dehumidification operation, and the upper and lower vanes 22 of the first group outlet of the indoor unit 2 subject to dew condensation prevention control are adjusted so as to avoid people. and the left and right louvers 24 are controlled, and the outlets of the second group in the indoor unit 2 subject to dew condensation prevention control are maintained in the closed state at the time of stop. Even in the indoor units 3 that are not subject to dew condensation prevention control, the state of the blowout port, which is the closed state at the time of stop, is maintained as it is.
In the dew condensation prevention operation C, the air conditioner performs the dehumidification operation, and the first group outlets of the indoor units 2 subject to dew condensation prevention control are arranged with the upper and lower vanes 22 and the left and right vanes 22 so as to avoid people. The louvers 24 are controlled, and the upper and lower vanes 22 and the left and right louvers 24 are controlled so that the outlets of the second group in the indoor unit 2 subject to dew condensation prevention control are changed from the closed state to the open state. Even in the indoor unit 3 that is not subject to dew condensation prevention control, the upper and lower vanes 22 and the left and right louvers 24 are controlled so that each outlet is changed from the closed state to the open state. At this time, as described above, the outlets of the second group of the indoor units 2 subject to condensation prevention control and the outlets of the indoor units 3 not subject to condensation prevention control are swung so as to perform efficient dehumidification. Alternatively, the vane angle and the louver angle may be set such that efficient dehumidification is performed.

As described above, according to the present embodiment, in an air conditioner having an indoor unit having a plurality of outlets, the plurality of outlets are the first outlet, which is the outlet to be subjected to dew condensation prevention control for the window. , and the second outlet, which is not subject to condensation prevention control, and the first outlet and the second outlet are controlled separately, so that the first outlet prevents condensation When doing so, the second outlet can contribute to the air conditioning of the indoor space, thereby keeping the temperature and humidity in the room adequate and preventing condensation on the windows. Also, even if there are multiple windows, it is possible to prevent dew condensation.

When a plurality of indoor units are provided, the indoor units are divided into indoor units that are subject to dew condensation prevention control for windows and indoor units that are not subject to dew condensation prevention control. Since the indoor units that are not subject to control are separately controlled, when the indoor units that are subject to condensation prevention control are preventing condensation, the indoor units that are not subject to condensation prevention control can contribute to the air conditioning of the indoor space. This makes it possible to prevent dew condensation on the windows while keeping the room temperature and humidity appropriate. Also, even if there are multiple windows, it is possible to prevent dew condensation.

In addition, in this embodiment, dew condensation prevention operation is performed according to presence/absence, so that dew condensation on the windows can be prevented without impairing the user's comfort.

The configuration shown in the above embodiment shows an example of the content of the present invention, and it is possible to combine it with another known technology, and one configuration can be used without departing from the scope of the present invention. It is also possible to omit or change the part.

1 remote control (remote controller), 2, 3 indoor unit, 4 outdoor unit, 20 indoor temperature sensor, 21 indoor humidity sensor, 22 upper and lower vanes, 23 thermopile sensor, 24 left and right louvers, 25 outlet, 30 housing, 201 occupant detection unit 202 window position detection unit 203 indoor temperature detection unit 204 indoor humidity detection unit 205 indoor/outdoor communication unit 206 outlet classification unit 207 dew point temperature calculation unit 208 wind direction determination unit 209 condensation occurrence determination unit; 210 air conditioning control unit, 401 outdoor air temperature detection unit, 402 indoor/outdoor communication unit.

Claims (7)

An air conditioner that has an outdoor unit and a first indoor unit connected to the outdoor unit, and air-conditions an indoor space having a window that separates the indoor from the outdoor by the outdoor unit and the first indoor unit. There is
The outdoor unit is
Equipped with an outside temperature detection unit that detects the outside temperature,
The first indoor unit is
a first indoor unit housing each having a wind direction and a wind direction switching part capable of switching opening and closing, and having a plurality of outlets for blowing out wind in a plurality of directions;
a first window position detection unit that detects the position of the window;
a first indoor temperature detection unit that detects the temperature of the indoor space;
a first indoor humidity detection unit that detects the humidity of the indoor space;
a first occupant detection unit that detects whether or not there is a person between the window and the first indoor unit housing;
calculating the dew point temperature of the indoor space based on the temperature and humidity of the indoor space detected by the first indoor temperature detection unit and the first indoor humidity detection unit, and calculating the calculated dew point temperature and the outside air; a first dew condensation determination unit that determines a dew condensation occurrence state of the window based on the temperature;
Based on the detected position of the window, the plurality of outlets are divided into a first outlet that is a target of dew condensation prevention control for the window and a second outlet that is a target of the dew condensation prevention control. a classification unit that classifies into the outlet of
The dehumidifying operation is performed when the first dew condensation determining unit determines that the window is in a dew condensation state and the first occupant detecting unit does not detect any occupant. Controlling the outdoor unit, controlling the wind direction switching unit of the first outlet to blow wind toward the window, and continuing the switching state before it was determined that the dew condensation occurred state. a first operation including controlling the wind direction switching unit of the second outlet such that the window is determined to be in a dew condensation state by the first dew condensation determination unit. In this case, when it is determined that the air conditioner is in operation, and when the first occupant detection unit detects a occupant, until the first time elapses During the period, the outdoor unit is controlled so as to continue the operation state before it was determined that the dew condensation occurred, and the first control is performed so that the wind does not hit the detected person. controlling the airflow direction switching unit of the air outlet, and controlling the airflow direction switching unit of the second air outlet so as to continue the switching state before it is determined that the dew condensation is occurring. A first air conditioning control unit that performs the operation of
air conditioner. When the first dew condensation determination unit determines that the window is in a dew condensation state and determines that the operation of the air conditioner is stopped, the first air conditioning control unit and controlling the outdoor unit to perform a dehumidifying operation until the first period of time elapses when the first occupant detection unit detects a occupant. and controlling the wind direction switching part of the first outlet so that the wind does not hit the detected person, and continuing the switching state before it was determined that the dew condensation occurred. The air conditioner according to claim 1 , wherein a third operation is performed including controlling the wind direction switching part of the second outlet. The first air-conditioning control unit determines that the window is in a dew condensation state by the first dew condensation determination unit, and the first occupant detection unit detects a occupant. In this case, the outdoor unit is controlled to perform a dehumidifying operation for a period after the first period of time has passed, and the first 3. The air according to claim 2 , wherein a fourth operation is performed including controlling the airflow direction switching part of one outlet and controlling the airflow direction switching part of the second outlet to be in an open state. harmony machine. further comprising a second indoor unit connected to the outdoor unit and arranged in the indoor space;
The second indoor unit is
a second indoor unit housing each having a wind direction switching part capable of switching the wind direction and opening and closing, and having a plurality of third outlets for blowing out wind in a plurality of directions;
a second window position detector that detects the position of the window;
a second indoor temperature detector that detects the temperature of the indoor space; a second indoor humidity detector that detects the humidity of the indoor space;
a second occupant detection unit that detects whether or not there is a person between the window and the second indoor unit housing;
calculating the dew point temperature of the indoor space based on the temperature and humidity of the indoor space detected by the second indoor temperature detection unit and the second indoor humidity detection unit, and calculating the calculated dew point temperature and the outside air; a second dew condensation determination unit that determines a dew condensation occurrence state of the window based on the temperature;
When the window is not detected by the second window position detection section, and when the second dew condensation determination section determines that the window is in a dew condensation state, and the second presence of A second air conditioner that controls the wind direction switching units of the plurality of third outlets so as to continue the switching state before the dew condensation state is determined when the human detection unit does not detect the presence of a person. a control unit;
The air conditioner according to claim 3 , comprising: The second air-conditioning control unit is operated when the window is not detected by the second window position detection unit and when the second dew condensation determination unit determines that the window is in a dew condensation state. and when a person is detected by the second person detection unit, the plurality of third air outlets are opened in a period after the first period of time has passed. The air conditioner according to claim 4 , which controls the wind direction switching unit. The second air-conditioning control unit is operated when the window is not detected by the second window position detection unit and when the second dew condensation determination unit determines that the window is in a dew condensation state. and the presence of a person is detected by the second presence detection unit, the switching before it is determined to be in the dew condensation state is performed until the first time elapses. 6. The air conditioner according to claim 5 , wherein the wind direction switching units of the plurality of third outlets are controlled so as to continue the state. 7. The air conditioner according to any one of claims 1 to 6 , wherein the wind direction switching unit includes vertical vanes for switching the wind direction in the vertical direction and opening and closing the outlet, and left and right louvers for switching the wind direction in the horizontal direction. machine.

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