JP2737455B2 - Operation control device for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for an air conditioner and relates to a measure for cleaning indoor air.

[0002]

2. Description of the Related Art Conventionally, an air conditioner employing a VAV system (variable air volume system) has been known, and as one example of this VAV system, there is a variable air flow single duct type. In this device, a plurality of VAV units (variable air volume units = variable air volume units) arranged in a room are connected to an outlet of the indoor unit via a duct, and the air-conditioned air sent from the indoor unit is connected. Is distributed to each of the above-mentioned VAV units, and the amount of air blown out is adjusted by each of the VAV units so that the conditioned air is blown into the room.

[0003] In this case, for example,
As shown in Japanese Patent No. 47497 or the like, the temperature of the conditioned air generated by the indoor unit is constant (V
The temperature is adjusted to a temperature at which the capacity becomes 100% when a 100% air volume blows out from the AV unit), and each VAV unit controls the air volume in proportion to the difference between the actual room temperature to be air-conditioned and the set temperature. Is performed, and the amount of air blown out (air supply amount) is adjusted according to the increase or decrease of the indoor thermal load so that the room temperature is set to the set temperature. Therefore, the capacity can be controlled for each VAV unit.

[0004]

In recent years, it has been proposed that the air conditioner described above is provided with a ventilation function by detecting the degree of contamination of indoor air.

[0005] In this case, in a so-called small room in which one VAV unit is provided in an air-conditioning area, when the degree of air pollution increases, the amount of air blown out is increased to exert a ventilation function.

However, in a so-called large room where a plurality of VAV units are provided in an air-conditioning area, when a dirt sensor of one VAV unit detects dirt in the air, the VAV unit close to the source of the dirt is detected. Increasing the blowing air volume causes the contaminated air to diffuse, and conversely delays the cleaning of indoor air.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to quickly purify indoor air.

[0008]

In order to achieve the above-mentioned object, a measure taken by the present invention is to stop air blowing from an air-conditioning unit which has detected contamination of room air, This is to increase the amount of air blown from the air conditioning unit.

More specifically, as shown in FIG. 1, the means according to the first aspect of the present invention includes a plurality of means for generating clean conditioned air and blowing the conditioned air from a ceiling outlet (32). Are provided in one air conditioning area (4), and the air conditioning units (3), (3),.
The indoor air inlets (4
The return condition (43) is connected to 2), (42),..., And an air conditioner that air-conditions the air conditioning area (4) is assumed.

A dirt detecting means (8b) for detecting the degree of air pollution in the air conditioning range of each of the air conditioning units (3), (3),. ,
(8b),... Are provided. Further, receiving the detection signals from the dirt detecting means (8b), (8b),..., It is determined whether or not the air pollution degree is a predetermined concentration. Is provided with a density judging means (52) for outputting a clean signal when the density becomes smaller than a predetermined density. In addition, when the concentration determination means (52) outputs a contamination signal, the air blowing of the air conditioning unit (3) corresponding to the contamination detection means (8b) which has detected high concentration air pollution is stopped, and the concentration determination is performed. When the means (52) outputs a clean signal, ventilation control means (53) for restarting air blowing of the stopped air conditioning unit (3) which has stopped air blowing is provided.

A second aspect of the present invention provides the first aspect of the present invention, wherein the ventilation control means (53) outputs a stop signal for stopping air blowing of the air conditioning unit (3). , Air-conditioning units (3), (3),... Located around the stopped air-conditioning unit (3).

[0012]

According to the first aspect of the present invention,
First, each of the air conditioning units (3), (3),... Generates clean conditioned air, for example, generates cold air or hot air from clean air that has passed through a filter, and outputs this conditioned air to the indoor ceiling outlet ( 32), and the ceiling inlet (42),
(42),... More indoor air is sucked in to air the room.

During the indoor air conditioning, the dirt detecting means (8b), (8b),.
(3),... Detect the degree of air pollution in the air-conditioning range, and upon receiving the detection signals from the stain detection means (8b), (8b),. If the air pollution degree is higher than the predetermined concentration, the indoor air is contaminated and a pollution signal is output.If the air pollution degree is lower than the predetermined concentration, the indoor air is clean. Because there is, a clean signal is output. When the concentration judging means (52) outputs the contamination signal, the ventilation control means (53) detects the high-concentration air contamination by the dirt detecting means (8).
The air blowing of the air conditioning unit (3) corresponding to b) is stopped, that is, the blowing of the air conditioning unit (3) close to the source of dirt is stopped, indoor air is sucked, and contaminated air is discharged.

Thereafter, when the indoor air becomes clean and the concentration determination means (52) outputs a clean signal, the ventilation control means (53) restarts the air blowing of the stopped air-conditioning unit (3) to perform a steady air-conditioning operation. Will do.

Further, in the invention according to claim 2, when the ventilation control means (53) outputs a stop signal of the air conditioning unit (3), the air volume increasing means (61) is located around the stop air conditioning unit (3). Air conditioning units (3), (3),
Are increased, and contaminated air is rapidly discharged from the surroundings to the suction ports (42), (42),.

[0016]

Therefore, according to the first aspect of the present invention,
When the dirt detecting means (8b) detects high-concentration air pollution, the air blowing of the air conditioning unit (3) corresponding to the detected dirt detecting means (8b) is stopped, so that the contaminated air is generated at the source. Since the air is sucked through the suction port (42) close to the air conditioner, the contaminated air can be discharged without diffusing the contaminated air in the air conditioning area (4), so that the air can be quickly cleaned. .

Further, according to the second aspect of the present invention, the air conditioning units (3) around the stopped air conditioning unit (3),
(3) In order to increase the amount of air blown out,
Since the contaminated air is more easily sucked into the suction port (42) and the contaminated air can be discharged more quickly, the air can be more reliably cleaned.

[0018]

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

As shown in FIG. 2, (1) is an air conditioner employing a VAV system, and has one indoor unit (2) and a plurality of VAV units (3) and (3) as air conditioning units. ,... (Three in FIG. 2).

Each of the VAV units (3), (3),.
Are installed in one room (4), which is one air conditioning area. The VAV units (3), (3),... Have dampers (31) inside, and the air supply duct (11) is branched. At the same time, the outlet (32) is opened on the ceiling of the room (4) and the motor (3) connected to the damper (31) is connected.
The damper (31) is rotated by (3) to control the amount of air blown into the room (4). Further, a plurality of suction ports (42), (42),... Corresponding to the respective VAV units (3), (3),. Are formed in a return passage (43) as return means connected to the ports (42), (42),.

On the other hand, in the indoor unit (2), the outside air intake duct (12) is connected to the suction side, the return passage (43) is connected, and the air supply duct (11) is connected to the outlet side. The outside air intake duct (12)
Is connected to the outside air via a total heat exchange unit (13). The indoor unit (2) takes in return air and outside air from the room (4) and sends out conditioned air to the air supply duct (11).

The indoor unit (2) includes a high-performance filter (21) and an indoor fan (2) from the suction side.
2) and an indoor (4) side heat exchanger (23) are arranged. The indoor (4) side heat exchanger (23) is connected to an outdoor unit (not shown) through a refrigerant pipe. While
A motor (24) is connected to the indoor fan (22). Then, the indoor unit (2) filters the sucked return air and the outside air with the high-performance filter (21), and then exchanges heat with the heat exchanger (23) to generate conditioned air. The air supply duct (1) is set by the indoor fan (22).
Are blown out to the respective VAV units (3), (3),.

On the other hand, each of the above-mentioned VAV units (3),
As shown in FIG. 3, (3),... Are connected to a VAV control unit (5), and are controlled by the respective VAV control units (5). Each of the VAV control units (5) includes a motor (33) of the VAV unit (3).
Connected to the central control unit (6) and the indoor control unit (7), and further connected to the thermistor (8).
a) and a dirt sensor (8b) as dirt detection means are connected.

The thermistor (8a) is connected to each VA
V units (3), (3),... Are provided so as to detect the room temperature within the air-conditioning range to be air-conditioned.
b) indicates each VAV unit (3), (3),.
Is provided so as to detect the concentration of the degree of air pollution in the air-conditioning range to be air-conditioned. The thermistor (8a)
b) is composed of, for example, a composite sensor.

Each of the VAV control units (5) is provided with an air volume control means (51), and a density determination means (52) and a ventilation control means (53) characteristic of the present invention.
Is provided. The air volume control means (51) receives the detection signal of the thermistor (8a) and controls the VAV to be controlled.
The opening of the damper (31) is controlled by calculating the amount of air blown out from the units (3), (3),... For example, as shown in FIG. And compare
When the room temperature Ta is lower than the set temperature Ts by 0.2 ° C. or more,
The target air volume is fixed at 40% of the rated air volume (100%), and when the difference between the room temperature Ta and the set temperature Ts is -0.2 ° C to + 1 ° C, the target air volume is changed from 40% to 100% according to the temperature difference. And in case the temperature difference is more than + 1 ° C
It is fixed at 00%.

The density determining means (52) receives the detection signal of the dirt sensor (8b) and determines whether or not the degree of air pollution is a predetermined density. Is configured to output a clean signal when the air pollution degree is lower than a predetermined concentration. When the concentration determination means (52) outputs the contamination signal, the ventilation control means (53) outputs a stop signal for stopping the air blowing of the VAV unit (3) controlled by the ventilation control means (53); When the concentration judging means (52) outputs a clean signal, the ventilation control means (53) controls the air flow control means (53) to restart the air blowing of the stopped VAV unit (3) which has stopped the air blowing. 51)
Is configured to be output.

On the other hand, the indoor control unit (7) controls the indoor fan (22) in response to the blowing air volume signal from each VAV control unit (5), and controls the operating capacity of the indoor unit (2). Is configured. Further, the centralized control unit (6) is provided with an air volume increasing means (61) which is a feature of the present invention.
1) When the ventilation control means (53) outputs a stop signal for stopping the air blowing of the VAV unit (3),
The VAV units (3), (3),... Located around the stopped VAV unit (3) are configured to increase the amount of blown air. For example, as shown in FIG.
In the room (4) in which the AV units (3), (3), ... are installed, when contaminated air is generated in the air-conditioning range of the central VAV unit (3), eight surrounding VAV units (3), (3) The amount of air blown out is increased by 20%.

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

First, when the indoor unit (2) and the outdoor unit are driven, rotation of the indoor fan (22) causes room air to pass through the air inlets (42), (42),. While being sucked into (2), the outside air passes through the total heat exchange unit (13) and is sucked into the indoor unit (2). Then, the return air and the outside air from the room (4) are filtered by the high-performance filter (21), and then heat-exchanged by the heat exchanger (23) to generate clean cold air or hot air. You. This conditioned air passes through the air supply duct (11) and passes through each of the VAV units (3), (3),.
, And is blown into the room (4) from the outlet (32) of each of the VAV units (3), (3),.
Air conditioning.

Therefore, each of the above-mentioned VAV units (3),
(3),... Will be described based on the control flow of FIG.

First, in step ST1, it is determined whether the operation is the cooling operation or the heating operation. If the operation is the cooling operation, the process proceeds to step ST2, where the target air volume Q is calculated from the room temperature Ta and the set temperature Ts based on the following equation. .

Q = 50 × (Ta−Ts) +50 (1) In the case of the heating operation, the process proceeds from step ST1 to step ST3, where the target air volume Q is set to the room temperature Ta and the set temperature.
It is calculated from Ts based on the following equation.

Q = 50 × (Ts−Ta) +50 (2) Subsequently, the process proceeds from step ST1 and step ST2 to step ST4, where it is determined whether or not the target air volume Q is larger than 100. In this case, the process moves to step ST5, and the target air volume Q is set to 100, that is, the rated air volume of 100%. Then, from step ST5, step ST5
6, while in step ST4, the target air volume Q
If it is determined that is less than or equal to 100, the process proceeds to step ST6, where it is determined whether or not the target air volume Q is smaller than the minimum air volume Qmin. If it is smaller than the minimum air volume Qmin, the process proceeds to step ST7 and the target air volume Q is set to the minimum air volume Qmin. On the other hand, if the target air volume Q is larger than the minimum air volume Qmin, the process returns from step ST6.

That is, the target air volume Q is set to 100% when the difference temperature Ta−Ts between the room temperature Ta and the set temperature Ts is + 1 ° C. or more during cooling operation, and to 40% when the difference temperature is −0.2 ° C. or less. The difference temperature Ta-Ts is changed proportionally between + 1 ° C and -0.2 ° C. In the heating operation, the target air volume Q is such that the difference temperature Ta−Ts between the room temperature Ta and the set temperature Ts is −1 ° C.
The temperature is set to 100% in the following cases, and is set to 40% in the range of + 0.2 ° C or more. The difference temperature Ta-Ts is changed proportionally between -1 ° C and + 0.2 ° C.

Thus, each VAV unit (3),
(3),... Change the amount of blown air so that the room temperature Ta becomes the set temperature Ts.

Next, the air cleaning control during the air conditioning operation will be described with reference to the control flow of FIG.

First, each of the above-mentioned VAV units (3),
(3), ... are VAV units (3),
Each of the dirt sensors (8b) detects the degree of air pollution in the air-conditioning range in which (3),.
The detection signals of b) are input to the VAV control unit (5).

Then, in step ST11, it is determined whether or not the forced air volume up signal reception flag FFO is set. This forced air volume up signal reception flag FFO
Is set when the forced air volume up signal is received from the air volume increasing means (61) of the centralized control unit (6), and is reset when the forced air volume up signal is cleared. If the forced air volume increase signal reception flag FFO has been reset, the process proceeds to step ST12, where dirt is determined, that is, each VAV control unit (5) receives a detection signal from the dirt sensor (8b). Density determination means (5
2) determines whether or not contaminated air has been generated in the air conditioning range of each of the VAV units (3), (3),. For example, when contaminated air such as cigarette smoke is generated, the concentration determination means (52) outputs a contamination signal, and when the air is cleaned, the concentration determination means (52) outputs a clean signal.

Thereafter, the process proceeds to step ST13, where it is determined whether or not the pollution occurrence flag FYH is set. The contamination occurrence flag FYH is set by the contamination signal of the density determination means (52) and reset by the clean signal. When the contamination occurrence flag FYH is set, the steps ST13 to ST14 are performed. The ventilation control means (53) outputs a stop signal, and the air volume control means (51) sets the target air volume Q to zero, and proceeds to step ST15.
Sets the stop control signal output flag FYS, and returns to step ST11. That is, the air blowing of the VAV unit (3) in the air conditioning range where the contaminated air has been generated is stopped.

On the other hand, when the ventilation control means (53) outputs a stop signal, the stop signal is transmitted to the central control unit (6).
Receives the air volume increase means (61), the VAV unit (3) located around the stopped VAV unit (3),
(3), output a forced air volume up signal to the VAV control unit (5). Therefore, in the VAV control unit (5) that has received the forced air volume increase signal, the determination in step ST11 is YES, and the determination in step ST11 is YES.
The process proceeds to step 16, where the target air volume Q is added to the previous target air volume Qb by 20, and the process returns to step ST11.

That is, in FIG.
When contaminated air is generated within the air-conditioning range of the AV unit (3), the blowing of air from the central VAV unit (3) is stopped, and eight VAV units (3),
(3), the amount of air blown out is increased by 20%.

Thereafter, when the contaminated air is exhausted and the concentration determination means (52) outputs a clean signal, the contaminant occurrence flag FYH is reset, so that the step ST is performed.
13 is NO, the process proceeds to step ST17, and the stop control signal output flag FYS is reset.
Then, the air volume control means (51) performs the above-described normal air volume control, and in step ST19, sets the previous target air volume Q to the current target air volume Q, and returns to step ST11.

When the contaminated air is generated again, the above-described control is performed, and the indoor air is cleaned by this control.

Next, the VAV in the air-conditioning range in which the contaminated air is generated
The position recognition of the units (3), (3),... Will be described based on the control flow of FIG.

First, in step ST21, a row component i
And the column component are set to 1 respectively, and the routine goes to Step ST2. That is, each VAV unit (3), (3),... Is specified by a row component i and a column component j. For example, as shown in FIG. i
And the column component j is set to 1, and nine VAV units (3),
(3),... Are specified by row components 1, 2, 3 and column components 1, 2, 3.

Thereafter, the process proceeds to step ST22, where the VAV unit (3) at the position (i, j) stops air blowing and determines whether or not the stop control flag FYR is set. Moves to step ST23, determines whether or not the row component i has become the last component, moves to step ST24 until the row component i becomes the last component, increments the row component i, and returns to step ST22. Also, in step ST23, when the row component i becomes the final component,
If the determination is YES, the process moves to step ST25 where the column component j
Is incremented, and the process proceeds to step ST26 where the column component j
Is determined to be the final component, and the process returns to step ST22 until the final component is reached. When the final component is reached, the process returns to step ST21.

That is, the row component i and the column component j are sequentially incremented to determine whether or not the stop control flag FYR of the VAV unit (3) at any position (i, j) has been set. . Then, V at any position (i, j)
If the stop control flag FYR of the AV unit (3) is set, the determination in step ST22 is YES, and
The row component i and the column component j are set to fixed values I and J. continue,
Moving to step ST28, the forced air volume up signal output flag FFS is set for the VAV units (3), (3),... Located before and after the row component i and the column component j which have been fixed values I and J. Then, the forced air volume up signal output flag FFS is reset for the VAV unit (3) at the position of the row component i and the column component j of the fixed values I and J, and step ST21 is performed.
Will return to.

Based on the stop control flag FYR and the forced air volume up signal output flag FFS, the control of zero or an increase in the target air volume Q in FIG. 7 is performed.

Accordingly, when the dirt sensor (8b) detects high-concentration air pollution, the detected dirt sensor (8b)
Since the air blowing of the VAV unit (3) corresponding to b) is stopped, the contaminated air is sucked from the suction port (42) close to the generation source, so that the contaminated air is diffused in the room (4). Since the contaminated air can be discharged without using the air, the air can be quickly purified.

Further, since the amount of air blown from the VAV units (3), (3),... Around the stopped VAV unit (3) is increased, the contaminated air is more absorbed into the suction port (4).
2) It becomes easy to be sucked in, and the contaminated air can be discharged more quickly, so that the air can be more reliably cleaned.

In this embodiment, the air conditioner (1) including the VAV units (3), (3),... Has been described. However, the present invention can be applied to an air conditioner other than the VAV system. .

[Brief description of the drawings]

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

FIG. 2 is a schematic configuration diagram illustrating an air conditioner.

FIG. 3 is a block diagram illustrating a control system of the air conditioner.

FIG. 4 is a characteristic diagram of a target air volume with respect to a room temperature and a set temperature.

FIG. 5 is a diagram showing an air conditioning range of each VAV unit.

FIG. 6 is a control flowchart showing air volume control.

FIG. 7 is a control flow chart showing indoor air cleaning control.

FIG. 8 is a control flowchart showing position recognition control of a VAV unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Indoor unit 3 VAV unit 8a Dirt sensor (dirt detecting means) 32 Outlet 42 Inlet 43 Return passage 51 Air flow control means 52 Concentration determining means 53 Ventilation control means 61 Air flow increasing means

Claims (2)

(57) [Claims] 1. A plurality of air conditioning units (3), (3),... That generate clean conditioned air and blow out the conditioned air from a ceiling outlet (32) are provided in one air conditioning area (4). , And indoor air suction ports (42), (42), provided on the ceiling corresponding to the air conditioning units (3), (3),.
Are connected to return means (43) to air-condition the air-conditioning area (4). The air-conditioning units (3), (3),. , (3),... (8b), (8)
b), ..., and the detection signals of the dirt detecting means (8b), (8b), ..., determine whether or not the air pollution degree is a predetermined concentration. A concentration judging means (52) for outputting a clean signal when the degree of air pollution is lower than a predetermined concentration; and a dirt detecting means (52) for detecting high-concentration air pollution when the concentration judging means (52) outputs a contamination signal. 8b) When the air blowing of the air-conditioning unit (3) corresponding to 8b) is stopped and the concentration determination means (52) outputs a clean signal, the ventilation that restarts the air blowing of the stopped air-conditioning unit (3) that stopped the air blowing. An operation control device for an air conditioner, comprising: a control unit (53). 2. A plurality of air conditioning units (3), (3),... That generate clean air-conditioned air and blow out the air-conditioned air from a ceiling outlet (32) are provided in one air-conditioning area (4). , And indoor air suction ports (42), (42), provided on the ceiling corresponding to the air conditioning units (3), (3),.
Are connected to return means (43) to air-condition the air-conditioning area (4). The air-conditioning units (3), (3),. , (3),... (8b), (8)
b), ..., and the detection signals of the dirt detecting means (8b), (8b), ..., determine whether or not the air pollution degree is a predetermined concentration. A concentration judging means (52) for outputting a clean signal when the degree of air pollution is lower than a predetermined concentration; and a dirt detecting means (52) for detecting high-concentration air pollution when the concentration judging means (52) outputs a contamination signal. 8b) When the air blowing of the air-conditioning unit (3) corresponding to 8b) is stopped and the concentration determination means (52) outputs a clean signal, the ventilation that restarts the air blowing of the stopped air-conditioning unit (3) that stopped the air blowing. Control means (53), when the ventilation control means (53) outputs a stop signal for stopping air blowing of the air conditioning unit (3), the air conditioning units (3) located around the stop air conditioning unit (3);
(3) Air volume increasing means (6) for increasing the amount of air blown out
1) An operation control device for an air conditioner, comprising: