JPH0539943A - Blowing direction control device of air conditioner - Google Patents

Abstract

PURPOSE:To prevent polluted air of high concentration from flowing directly toward people in a room in the case that indoor air is polluted. CONSTITUTION:An air blowing direction control means 31 outputs a horizontal blowing signal to a blowing direction changing means 22 as a concentration judging means 30 outputs an air pollution signal. The air blowing direction changing means is controlled in response to the horizontal blowing signal in place of a setting signal of an air direction setting means 29 so as to drive some blowing vanes 21 in a horizontal blowing operation. The blown air is directed in a horizontal direction along a ceiling and the cigar smoke ascends and is dispersed to cause its concentration to be decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow-out direction control device for an air conditioner, and more particularly to measures for cleaning air of high-concentration pollution caused by smoking or the like.

[0002]

2. Description of the Related Art Generally, an air conditioner is disclosed in Japanese Patent Application Laid-Open No. Sho 62-62.
As disclosed in Japanese Laid-Open Patent Publication No. 131131/1993, there is a type in which a horizontal louver and a vertical louver are driven to adjust the wind direction. For example, as shown in FIG. The unit (b) is arranged and the conditioned air is blown from the upper part of the room, and is blown downward during heating and horizontally during cooling in order to make the temperature distribution inside the room uniform.

[0003]

However, when the air is blown out downward when the air is blown in the vicinity of the air outlet even when it is being heated or when it is being cooled, the air is blown downwards by smoking or the like. When smoke or gas having a high concentration is locally generated, as shown in FIG. 4, blown air causes a high concentration of contaminated air to flow horizontally from a generation source and is inhaled by surrounding people. In particular, when the pollution is a cigarette, there is a problem that it causes so-called second-hand smoke, which indirectly smokes, and impairs the health of those who do not smoke.

The present invention has been made in view of the above points, and an object thereof is to prevent high-concentration contaminated air from directly hitting a person in the room when the indoor air is contaminated. There is.

[0005]

In order to achieve the above object, the means taken by the present invention is to detect air pollution and make the air blowing direction horizontal.

Specifically, as shown in FIG. 1, an air conditioning unit (2) for generating conditioned air and blowing it out into the room from an outlet (7) near the ceiling (3) is provided, and the outlet (7) is provided. ) To change the blowing direction of the conditioned air
It is premised on the air conditioner provided with 1).

[0007] Specifically, the air flow direction setting means (29) for outputting a setting signal for setting the air blowing direction from the air outlet (7) is provided. further,
A blowing direction changing means (22) for driving the blowing blades (21) in response to a setting signal of the wind direction setting means (29) to change the air blowing direction is provided. Furthermore, a dirt detection means (27) is provided corresponding to the air outlet (7) and detects the degree of air pollution within the air outlet range of the air outlet (7). Furthermore, upon receiving the detection signal of the dirt detection means (27), a density determination means (30) which outputs a pollution signal when the air pollution degree becomes higher than a predetermined concentration and outputs a clean signal when the air pollution degree becomes lower than the predetermined concentration. ) Is provided. in addition,
When the concentration determining means (30) outputs a pollution signal, a horizontal blowing signal is output to the blowing direction changing means (22), and the blowing direction changing means (22) outputs the wind direction setting means (29).
The blowout direction changing means (22) is controlled so that the air blowout direction is horizontally blown out on the basis of the horizontal blowout signal instead of the setting signal, while the concentration determining means (30) outputs a clean signal after the pollution signal is output. When output, the output of the horizontal blowing signal is stopped, and the blowing direction changing means (22) controls the blowing direction so that the blowing direction is controlled based on the setting signal of the wind direction setting means (29). The blowing direction control means (31) is provided.

[0008]

With the above construction, according to the present invention, the blowing direction changing means (2) receives the setting signal of the wind direction setting means (29).
2) drives the blowing blades (21) to change the air blowing direction to horizontal blowing, downward blowing, etc. to air-condition the room. on the other hand,
The dirt detecting means (27) detects the degree of air pollution in the air blowing range from the air outlet (7), and the density determining means (3)
0) receives the detection signal of the dirt detection means (27) and outputs a pollution signal when the air pollution degree becomes higher than a predetermined concentration and outputs a clean signal when the air pollution degree becomes lower than the predetermined concentration.

When the concentration determining means (30) outputs a contamination signal, the blowing direction control means (31) outputs a horizontal blowing signal to the blowing direction changing means (22), and the blowing direction changing means (31). 22) is controlled based on the horizontal blowing signal instead of the setting signal of the wind direction setting means (29), and drives the blowing blades (21) to horizontal blowing. Thereby, the blown air flows horizontally along the ceiling, spreads to the surroundings, hits the surrounding walls, descends, and goes toward the center of the room (1). So, for example, if the source of indoor air pollution is smoking,
When a person in the vicinity of the air outlet (7) smokes, the smoke rises, diffuses during the rise, and the concentration decreases. Further, when the smoker is away from the air outlet (7), the air that hits the surrounding walls and descends flows horizontally toward the center of the bottom of the room (1), but the momentum is weak, and smoke Does not flow horizontally but rises and spreads. for that reason,
People around smokers do not breathe in air containing high concentrations of smoke directly.

After that, when the concentration determining means (30) outputs a cleaning signal, the blowing direction control means (31) stops outputting the horizontal blowing signal, and the blowing direction change (22) is performed by the wind direction setting means (29). Is controlled based on the setting signal of, for example, the blowing direction changing means (22) is controlled so that the horizontal blowing direction of the air is downward. Therefore, when the pollution is eliminated, the air conditioning operation of the original downward blowing is immediately returned to.

[0011]

As described above, according to the present invention, when the contamination detecting means (27) and the density determining means (30) detect the pollution such as smoking, the blowing direction control means (31) becomes horizontal. Since the blowing direction changing means (22) is controlled as described above, it is possible to prevent people around the person from directly inhaling the air containing high-concentration smoke. It is possible to prevent so-called second-hand smoke that has occurred on the downstream side of the direction and maintain the health of those who do not smoke.

Further, since the original air-conditioning operation is immediately resumed when the pollution is eliminated, efficient cooling and heating can be performed and comfort can be improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the air conditioner has a structure in which one indoor unit (2) is installed in a room (1) which is one air-conditioned area.

The indoor unit (2) constitutes an air conditioning unit, and as shown in FIG. 3, is formed in a ceiling-embedded type embedded in the ceiling (3) of the room (1), and has a bottom surface. The outer surface (5) of the square view has a suction port (6) in the center,
Elongated air outlets (7) are provided at four locations around the suction port (6), and the suction port (6) is provided with an outer plate (10) and a filter (11) having a large number of slits. And are fitted. The interior of the indoor unit (2) is divided by a partition plate (13) into a suction space (14) and a discharge space (15).
And an indoor fan (17) having a variable air volume is disposed in the suction space (14) so that the fan outlet (18) of the indoor fan (17) projects into the outlet space (15). On the other hand, the blowout space (15) is provided with an indoor heat exchanger (19) that functions as a condenser during heating and as an evaporator during cooling. Although not shown, the indoor heat exchanger (19) is connected to the outdoor unit via a refrigerant pipe. Then, the air sucked into the suction space (14) from the suction port (6) is sent to the blowout space (15) by the indoor fan (17), is conditioned by the indoor heat exchanger (19), and is then blown. It is blown out from the exit (7) into the room (1).

An outlet blade (21) is provided at each outlet (7), and each outlet blade (21) has an outlet blade (2).
Blow-out direction changing means (22) for driving 1) to switch the air blow-out direction is connected. The blowing direction changing means (22) uses a crank mechanism (25) including a connecting plate (23), a first connecting rod (24a), and a second connecting rod (24b) on each of the blowing blades (21) to drive the motor. (26) is connected, and the crank mechanism (25) swings the blowing blades (21) by the rotation of the motor (26), whereby the air blowing direction is between horizontal and obliquely downward, and further below. It is changing.

Further, as a feature of the present invention, a dirt sensor (27) as dirt detecting means for detecting the concentration of the air pollution degree due to smoke, gas, etc. is provided in the air conditioning range where the indoor unit (2) is air conditioned. It is provided. The dirt sensor (2
7) is composed of a semiconductor sensor, and when hydrogen gas is generated during smoking in an electrically heated state, the resistance value is lowered by the hydrogen gas, so that the resistance value is detected to detect contamination of indoor air. There is.

Further, the control unit (28) is provided with an airflow direction setting means (29), a density determination means (30), and an outlet direction control means (31). The wind direction setting means (29) is configured to output a setting signal to the blowing direction changing means (22) based on a signal from a remote controller or the like. The density determination means (30) is a dirt sensor (2
Upon receiving the detection signal of 7), when the air pollution degree becomes higher than a predetermined concentration, a pollution signal is output, and when the air pollution degree becomes lower than a predetermined concentration, a clean signal is output. As the concentration setting value, the ratio Rs / Rt between the detection resistance value (Rs) and the reference resistance value (Rt) is used, and the setting value Rs /
Rt varies depending on the air volume mode of the indoor fan (17), and is 0.83 when the air volume is "large" and 0.7 when "medium"
8 and "small" are set to 0.73.

The blowing direction control means (31) outputs a horizontal blowing signal to the blowing direction changing means (22) when the concentration determining means (30) outputs a pollution signal, and the blowing direction changing means (22). Instead of the setting signal of the wind direction setting means (29), the blowing direction changing means (22) is controlled so that the air blowing direction is horizontally controlled based on the horizontal blowing signal, while the concentration determining means (30) is controlled. When the clean signal is output after the pollution signal is output, the output of the horizontal blowing signal is stopped,
The blowing direction changing means (22) is the wind direction setting means (29).
The blowing direction changing means (22) is controlled so as to control the blowing direction based on the setting signal.

Next, the air conditioning operation of the air conditioner will be described.

First, when the indoor unit (2) and the outdoor unit are driven, the indoor air is sucked into the suction port (6) by the rotation of the indoor fan, and after the air is conditioned, the indoor air is discharged from the air outlet (7) into the room (1). Blown out.

The air blowing direction control will be described. In order to control the blowing direction, first, the resistance value (Rs is sampled every minute time (for example, 1.6 seconds)).
) And the maximum value (MAX) which is the resistance value in the cleanest condition during operation, and the sampling resistance value (Rs)
And the detected resistance ratio Rs / MAX between the maximum value (MAX) and the set value Rs / Rt are compared.

The operation for determining the maximum value (MAX) will be described.

First, the first resistance value (Rs) detected by the dirt sensor (27) is set to the previous maximum value (MAXp), a timer for 8 minutes is set, and sampling is performed at every minute time. When the sampling resistance value (Rs) is larger than the previous maximum value (MAXp), the sampling resistance value (Rs) is set to the current maximum value (MAX). After that, the timer for 8 minutes is set to start the second sampling period, the maximum value (MAXp) of the sampling time in the previous period is set as the current maximum value (MAX), and sampling is continued, and the sampling resistance value (Rs) If is less than or equal to the maximum value (MAX) of this time, the maximum value (MAX) of this time is directly set to the maximum value (MAXp) of the previous time. On the other hand, when the sampling resistance value (Rs) exceeds the maximum value (MAX), the sampling resistance value (Rs) is set to a new maximum value (MAX). That is,
While the resistance value (Rs) of the cleanest air-conditioned air in the sampling section so far is set to the maximum value (MAX), when the indoor air becomes more clean during this sampling section, the resistance value of the sampling (Rs) is updated to a new maximum value (MAX) one after another. Then, the detected resistance ratio Rs / MAX is calculated for the resistance values (Rs) sampled one after another. After the third sampling period, the same operation as the second sampling period is repeated.

Next, the operation of detecting the generation of dirt will be described. The detection resistance ratio Rs / MAX is determined by the indoor fan (1
It is determined whether it is smaller than the set value Rs / Rt corresponding to the air volume mode of 7). For example, since the set value Rs / Rt is 0.83 when the air volume mode is "large", it is determined whether the detection resistance ratio Rs / MAX is smaller than 0.83, and the detection resistance ratio Rs / MAX is 0. When it is less than 0.83, it is determined that the indoor air is contaminated due to smoking or the like. Then, the blowing direction control means (31) receives the switching signal of the blowing direction changing means (22), and the blowing direction changing means (2).
2) controls the blowing direction changing means (22) based on the setting signal of the wind direction setting means (29) so that the blowing direction becomes horizontal when the downward blowing control is performed.

Therefore, as shown in FIG. 2, the blown air flows horizontally along the ceiling, spreads to the surroundings, hits the surrounding walls, and descends toward the center of the room (1). When a person in the vicinity of the air outlet (7) smokes, the smoke rises and is sucked into the indoor unit (2) through the air inlet (6). Then, the smoke sucked into the indoor unit (2) is collected to some extent by the filter (11), and then is agitated and diluted with the intake air by the indoor fan (17) to have a low concentration,
It is blown into the room (1) from the air outlet (7). Further, when the smoker is away from the air outlet (7), the air that hits the surrounding walls and descends flows horizontally toward the center of the bottom of the room (1), but the momentum is weak, and smoke Does not flow horizontally but rises and spreads. for that reason,
People around smokers do not breathe in air containing high concentrations of smoke directly.

Next, during the horizontal blowing control, the change ratio Rs / Rm of the resistance value (Rs) sampled one after another in the same sampling section and the previous resistance value (Rm) is calculated, and the change is calculated. It is determined whether the ratio Rs / Rm is greater than 1.05. When the change ratio Rs / Rm is 1.05 or less, it is determined that smoking continues, and the determination is repeated. On the other hand, when the change ratio Rs / Rm is greater than 1.05, the previous resistance value (Rm) at that time is stored as the reference value (R1), and the reference value (R1) and the resistance value (Rs) sampled after that are stored. And change ratio Rs / R1> 1.05
If the state of continues for 3 minutes or more, it is determined that smoking has ended, and the forced blowing mode ends. That is, the blowing direction control means (31) controls the blowing direction changing means (22) so that, for example, the horizontal air blowing direction is directed downward. Therefore, when the pollution is eliminated, the air conditioning operation of the original downward blowing is immediately returned to.

Therefore, according to the present embodiment, when the dirt sensor (27) and the density determining means (30) detect the pollution due to smoking or the like, the blowing direction control means (31) becomes horizontal so that the blowing direction is controlled. Since the changing means (22) is controlled, it is possible to prevent people around the person from directly inhaling air containing high-concentration smoke, and to prevent so-called passive smoking that has conventionally occurred downstream in the blowing direction due to smoking. You can keep the health of those who do not smoke.

Further, the original air-conditioning operation is immediately resumed when the pollution is eliminated, so that efficient cooling and heating can be performed and comfort can be improved.

The air conditioner may be other than that of this embodiment as long as it controls the air blowing direction into the room (1). For example, an air conditioner equipped with a high performance filter, an electrostatic precipitator or the like may be used. It may be applied to the air blow of a purifier, and VA
It may be applied to the air blowing of the VAV unit in the air conditioner of the V system. It may also be applied to the outlet of a duct connected to the indoor unit (2).

The present invention can also be applied to an air conditioner having a plurality of indoor units (2) in the room (1). In that case, each indoor unit (2)
Alternatively, the blowing direction may be controlled for each indoor unit (2) by detecting the degree of air pollution within the conditioned air range.

Further, it goes without saying that the present invention can be applied to the case where there is no suction port (6) near the air outlet (7). In this case, when a person in the vicinity of the blower outlet (7) smokes, the smoke diffuses while rising and the concentration decreases, so that passive smoking is prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of the present invention.

FIG. 2 is a diagram showing a smoke flow of a cigarette at the time of horizontal blowing.

FIG. 3 is a cross-sectional view showing an indoor unit.

FIG. 4 is a diagram showing the flow of cigarette smoke during conventional air conditioning.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor 2 Indoor unit 3 Ceiling 7 Air outlet 21 Air outlet blade 22 Air blow direction changing means 27 Dirt sensor (dirt detecting means) 29 Air flow direction setting means 30 Concentration determining means 31 Air blowing direction control means

Claims (1)

[Claims] 1. An air conditioning unit (2) for generating conditioned air and blowing the conditioned air into a room through an outlet (7) near a ceiling (3), and changing the blowing direction of the conditioned air to the outlet (7). In an air conditioner provided with blowout blades (21), a wind direction setting means (29) for outputting a setting signal for setting the air blowing direction from the outlet (7), and setting of the wind direction setting means (29) A blowout direction changing means (22) for receiving the signal to drive the blowoff blades (21) to change the air blowout direction, and the blowout port (7) provided corresponding to the blowout port (7).
A dirt detection unit (27) for detecting the degree of air pollution within the air blowing range of the air conditioner, and a detection signal of the dirt detection unit (27). When the density becomes smaller than a predetermined density, a density determining means (30) outputs a cleaning signal, and when the density determining means (30) outputs a pollution signal, a horizontal blowing signal is output to the blowing direction changing means (22). The blowing direction changing means (22) is the wind direction setting means (29).
The blowout direction changing means (22) is controlled so that the air blowout direction is horizontally blown out on the basis of the horizontal blowout signal instead of the setting signal, while the concentration determining means (30) outputs a clean signal after the pollution signal is output. When output, the output of the horizontal blowing signal is stopped, and the blowing direction changing means (22) controls the blowing direction so that the blowing direction is controlled based on the setting signal of the wind direction setting means (29). An outlet direction control device for an air conditioner, comprising: an outlet direction control means (31).