JPH0979606A - Air conditioner - Google Patents

Abstract

(57) [PROBLEMS] To provide an air conditioner capable of adjusting the amount of supply of outside air in response to changes in indoor air quality. SOLUTION: An outside air supply port 11, a return air port 12 and a blowout port 13 are provided, and a blower 2 and a heat exchanger 3 are provided in the inside air flow path between the return air port 12 and the blowout port 13. A confluence point at which the outside air supplied from the outside air supply port 11 merges with the inside air is provided closer to the return air port 12 than the blower 2, and the outside air supply port 11 has a damper 6 capable of adjusting the outside air supply amount. Is provided, and air quality detection means 4 for detecting the air quality is provided closer to the return air outlet 12 side than the confluence point. The air quality signal detected by the air quality detection means 4 is input to determine the air quality in the room. When the air quality in the room is slightly bad, the opening degree of the damper 6 is increased. When the air quality in the room is slightly bad, the opening degree of the damper 6 is medium. When the air quality in the room is good, the opening degree of the damper 6 is decreased. A controller 8 that outputs a control signal to the damper driving device 7 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for cooling and heating a building.

[0002]

2. Description of the Related Art Conventionally, as an air conditioner provided with a ventilation function in addition to a room temperature control function, for example, Japanese Patent Laid-Open No. Hei 3
The one described in Japanese Patent Publication No. -87533 is known. This air conditioner has an inside air flow path between the return air port and the blowout port inside a main body provided with an outside air supply port that is opened outdoors, a return air port that is opened indoors, and a blowout port. In the middle of the, a blower is provided in which the air supply side faces the outside air supply port and the return air port and the blowout side faces the blowout port, and a heat exchanger that heats and cools the blown air of the blower is provided. The confluence point at which the outside air supplied from the outside air supply port merges with the inside air is provided on the return air side of the blower, and the opening degree of the outside air supply port is set to the outside air supply port. A damper is provided for adjustment.

Therefore, by operating the blower with the outside air supply port opened, the outside air supplied from the outside air supply port can be blown out into the room from the outlet for ventilation.

[0004]

However, in such a conventional air conditioner, although the outside air can be taken into the room for ventilation, the outside air supply can be performed in response to the change in the air quality in the room. Since the amount of air cannot be adjusted, the air chamber in the room may be deteriorated due to insufficient outside air supply.

Further, since the outside air supply amount from the outside air supply port is not stable under the influence of the opening and closing of the opening of the room where the air conditioner is installed and the change of the outdoor wind, the outside air supply amount There is a problem that the air chamber in the room may be deteriorated due to the shortage, or conversely, the air conditioning load may be increased or the temperature control function in the room may be deteriorated due to the excess supply of outside air.

In view of the above, the first object of the air conditioner of the present invention is to adjust the outside air supply amount in response to changes in the air quality in the room. The second purpose is to stabilize the outside air supply amount.

[0007]

In order to achieve the first object, in the air conditioner according to claim 1 of the present invention, the outside air supply port opened to the outside, the return air port opened to the room, and An outlet is provided, and a blower and a heat exchanger are provided in the middle of the inside air flow path between the return air outlet and the outlet.
In the blower, the air supply side faces the outside air supply port and the return air side, and the blow side faces the outlet side, and the supply side is supplied to the return air side from the blower from the outside air supply port. In an air conditioner in which a confluence point at which the outside air that has ventilated merges with the inside air is provided, and an air supply amount adjusting means that can adjust the outside air supply amount is provided at the outside air supply port Air quality detection means for detecting the air quality is provided on the air inlet side, and the air quality signal detected by this air quality detection means is input, and when the air quality is poor, the outside air supply amount is increased more than when it is good, The air supply amount control means for outputting to the air supply amount adjusting means a control signal for reducing the outside air supply amount when the air quality is bad is provided.

In order to achieve the second object in addition to the first object, in the air conditioner according to claim 2 of the present invention, the air supply amount control means is supplied from the outside air supply port. Connected with the air supply amount detection means for detecting the outside air supply amount to be aspirated,
The outside air supply amount is controlled based on the outside air supply amount detected by the supply air amount detecting means.

As the air chamber detecting means, for example,
A CO ₂ sensor, a CO sensor, a dust sensor, a miscellaneous gas sensor can be used. These sensors may be used alone or in combination, and the detection values of the sensors may be summed by the arithmetic unit.

As the supply air amount detecting means, a flow rate sensor for directly detecting the flow rate may be used, or from the flow velocity sensor and the flow velocity of the outside air detected by the flow velocity sensor and the cross-sectional area of the outside air supply port. You may use what consists of a calculating device which calculates a flow volume.

[0011]

In the air conditioner according to the first aspect of the present invention, when the outside air is supplied from the outside air supply port for ventilation, the air supply amount control means controls the air conditioner so that the air quality in the room is poor. Since the outside air supply amount can be increased more than in the case and the outside air supply amount can be reduced when the indoor air quality is good compared to when the indoor air quality is bad, the indoor air quality is stabilized.

In the air conditioner according to the second aspect of the present invention, when the outside air is supplied from the outside air supply port for ventilation,
Since the outside air supply amount can be controlled by the control of the supply air amount control means, the outside air supply port can be controlled without being affected by the opening and closing of the opening of the room where the air conditioner is installed and the change of the outdoor wind. The outside air supply amount from is stable.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An air conditioner according to an embodiment will be described below with reference to the drawings. An apparatus corresponding to the air conditioner according to claim 1 of the present invention is shown in the first embodiment, and an apparatus corresponding to the air conditioner according to claim 2 of the present invention is shown in the second embodiment.

(Embodiment 1) First, the configuration of an air conditioner according to Embodiment 1 of the present invention will be described in detail with reference to FIGS. 1 is a partially cutaway perspective view showing an air conditioner of Embodiment 1, FIG. 2 is a block diagram showing a configuration and an air flow of the air conditioner, and FIG. 3 is a control flow of a controller adopted in the air conditioner. It is a flowchart showing.

In this air conditioner A1, as shown in FIG. 1, a heat insulating material 103 is provided between an inner wall material 101 and an outer wall material 102.
An outside air supply port 1 attached to a wall W configured by providing an opening to the outside through a communication passage D provided in the wall W
1 and a box-shaped main body 1 in which a return air opening 12 and an outlet 13 for opening to the room are formed. Inside the main body 1, a blower 2 and a heat exchanger 3 are provided, An air conditioning unit is configured by these. The return air port 12 is composed of a plurality of slits, and an indoor filter 5 is provided near the return air port 12. A movable plate 14 for adjusting the wind direction is provided at the outlet 13.

The blower 2 is disposed in the inside air flow path between the return air outlet 12 and the air outlet 13, and the air supply side of the outside air supply inlet 11 and the return air inlet 12 is The outlet side faces the outlet 13. Further, the heat exchanger 3 is formed so as to be able to cool and heat the air flow, and is arranged closer to the return air port 12 than the blower 2. The outside air supplied from the outside air supply port 11 joins the inside air between the blower 2 and the heat exchanger 3.

Further, an air quality detecting means 4 for detecting the air quality is provided on the heat exchanger 3 side at the confluence point where the inside air and the outside air join, that is, the return air port 12 side.

That is, as shown by the thick arrow in FIG. 2, the indoor air sucked from the return air port 12 first passes through the indoor filter 5 to filter dust and dust, and then the heat exchanger 3 After being heated or cooled by the air passage, the air quality detection means 4 is passed through the flow path, and then the air blower 2 is passed through to the air outlet 1
Blow out from 3 to the room. Further, the outdoor air sucked from the outside air supply port 11 is, as shown by the thin line arrow in FIG.
After merging with the air in the room between the air quality detection means 4 and the blower 2, the air passes through the blower 2 and is blown out into the room from the air outlet 13.

Further, the air conditioner A1 is provided with a damper 6 capable of opening and closing the outside air supply port 11 as an outside air supply amount adjusting means capable of adjusting the outside air supply amount.
A damper drive device 7 that drives the damper 6 is provided. The damper drive device 7 is controlled by a controller 8 as a supply amount control means.

The controller 8 inputs the air quality signal a detected by the air quality detecting means 4 and outputs a control signal b to the damper driving device 7 based on the air quality signal a.

Next, the control flow of the controller 8 when the outside air supply mode is selected will be described with reference to FIG.

In step S1, the indoor air quality detected by the air quality detecting means 4 is read.

In step S2, it is judged whether the air quality in the room is good, somewhat bad, or bad. If yes, go to step 3, if it is bad, go to step 4, and if bad, go to step 5. Proceed to.

In step S3, control is performed to reduce the opening degree of the damper 6.

In step S4, control is performed to set the opening degree of the damper 6 to the middle.

In step S5, control is performed to increase the opening of the damper 6.

As described above, in the air conditioner A1 of the first embodiment, when the outside air is supplied from the outside air supply port 11 for ventilation, and when the indoor air quality is poor due to the control of the controller 8. The open degree of the damper 6 is increased to increase the outside air supply amount, and when the indoor air quality is good, the opening amount of the damper 6 is decreased to reduce the outside air supply amount compared to the case where the indoor air quality is bad. Therefore, the air quality in the room is stable, and thus it is possible to prevent the air quality in the room from deteriorating due to insufficient supply of air.

(Second Embodiment) Next, the configuration of an air conditioner according to a second embodiment of the present invention will be described in detail with reference to FIGS. 4 is a partially cutaway perspective view showing an air conditioner according to a second embodiment, FIG. 5 is a block diagram showing a configuration and an air flow of the air conditioner, and FIG. 6 is a control flow of a controller adopted in the air conditioner. It is a flowchart showing.

In the air conditioner A2 of the second embodiment, as shown in FIGS. 4 and 5, a blower 9 for exclusive use of air supply is provided instead of the damper 6 as the air supply amount adjusting means capable of adjusting the outside air supply amount. Further, in the vicinity of the outside air supply port 11, an air supply amount detecting means 10 for detecting the outside air supply amount is provided. Then, the controller 8 uses the air supply amount detecting means 1
The outside air supply amount signal c of 0 is input, and this outside air supply amount signal c
Based on the above, the control signal d is output to the blower 9 for exclusive use of the supply air to control the outside air supply amount.

Next, the control flow of the controller 8 when the outside air supply mode is selected will be described with reference to FIG.

In step S1, the indoor air quality detected by the air quality detecting means 4 and the outside air supply amount detected by the supply air amount detecting means 10 are read.

In step S2, it is judged whether the air quality in the room is good, somewhat bad, or bad. If yes, go to step 3, if it is bad, go to step 4, and if bad, go to step 5. Proceed to.

In step S3, the amount of outside air supplied from the outside air supply port 11 is controlled to be small.

In step S4, control is performed to make the outside air supply amount from the outside air supply port 11 the standard amount.

In step S5, control is performed to increase the outside air supply amount from the outside air supply port 11.

As described above, in the air conditioner A2 of the second embodiment, when the outside air is supplied from the outside air supply port 11 for ventilation, the outside air supply amount can be controlled by the controller 8. Therefore, the amount of air supplied from the outside air supply port 11 is stable without being affected by the opening and closing of the opening of the room where the air conditioner A2 is installed and the change in the outdoor wind, and thus the outside air supply air is supplied. It is possible to prevent the air quality in the room from deteriorating due to the insufficient amount, the air conditioning load from increasing due to the excess amount of outside air supply, and the temperature adjusting function in the room from decreasing.

Since the other construction is the same as that of the air conditioner A1 of the first embodiment, the same reference numerals as those of the first embodiment are attached to the drawings and the description thereof will be omitted.

In the second embodiment, as shown in FIG. 7, the controller 8 controls the outside air supply amount to change stepwise (three steps) according to the air quality. However, as shown in FIG. 8, control may be performed so that the air quality and the outside air supply amount are proportional.

Although the embodiment has been described above, the specific structure is not limited to this embodiment.
Even if the design is changed without departing from the gist of the present invention, it is included in the present invention.

For example, in the embodiment, the blower 2 is provided on the blower outlet 13 side of the heat exchanger 3, but the heat exchanger 3 may be provided on the blower outlet 13 side of the blower 2. in this case,
By providing the heat exchanger 3 on the blower outlet 13 side with respect to the confluence of the outside air and the inside air, the outside air from the outside air supply port 11 can also be blown out into the room after passing through the heat exchanger 3. The adjustment can be performed more efficiently.

[0041]

As described above, in the air conditioner according to the first aspect of the present invention, when the outside air is supplied from the outside air supply port for ventilation and the air quality in the room is poor. Since the air quality in the room can be stabilized by increasing the outside air supply amount more than when it is good, and by decreasing the outside air supply amount when the air quality in the room is good compared to when it is bad,
The effect that it is possible to prevent the air quality in the room from being deteriorated due to the shortage of the supply air amount is obtained. In addition, the air conditioning load does not increase and the indoor temperature control function does not decrease due to the excess amount of outside air supplied.

Further, in the air conditioner according to claim 2 of the present invention, when the outside air is supplied from the outside air supply port for ventilation, the opening of the room in which the air conditioner is installed. Since the outside air supply amount can be stabilized without being affected by the opening and closing of the room and the influence of changes in the outdoor wind, the air quality in the room will deteriorate due to insufficient outside air supply amount, and the air conditioning load due to excessive outside air supply amount. It is possible to prevent the increase or decrease in the temperature control function in the room.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an air conditioner according to a first embodiment.

FIG. 2 is a block diagram showing a configuration and an air flow of the air conditioner of the first embodiment.

FIG. 3 is a diagram showing a flowchart showing a control flow of a controller adopted in the air conditioner of the first embodiment.

FIG. 4 is a partially cutaway perspective view showing an air conditioner of a second embodiment.

FIG. 5 is a block diagram showing a configuration and an air flow of the air conditioner of the second embodiment.

FIG. 6 is a diagram showing a flowchart showing a control flow of a controller adopted in the air conditioning apparatus of the second embodiment.

FIG. 7 is a diagram showing a relationship between an outside air supply amount and air quality.

FIG. 8 is a diagram showing the relationship between the outside air supply amount and the air quality.

[Explanation of symbols]

 A1, A2 Air conditioner 11 Outside air supply port 12 Return air port 13 Outlet 2 Blower 3 Heat exchanger 4 Air quality detection means 6 Damper (supply amount adjusting means) 7 Damper drive device 8 Controller (supply amount control means) ) 9 Dedicated blower for air supply (air supply amount adjusting means) 10 Flow rate detecting means (air supply amount detecting means)

Claims (2)

[Claims] 1. An outside air supply port to be opened outdoors, a return air port to be opened indoors, and a blowout port are provided, and a blower and heat are provided in the inside air flow path between the return air port and the blowout port. An exchanger is provided, and the blower has an air supply side facing the outside air supply port and the return air side, a blowout side faces the outlet side, and the blower side is closer to the return air side than the blower. An air conditioner in which a confluence point at which the outside air supplied from the outside air supply port joins with the inside air is provided, and the outside air supply port is provided with a supply amount adjusting means capable of adjusting the outside air supply amount, Air quality detection means for detecting the air quality is provided on the return air side from the confluence point, and the air quality signal detected by this air quality detection means is input. Increase the air volume and reduce the outside air supply when the air quality is good than when it is bad. It air conditioner according to claim air supply amount control means for outputting a control signal to the air supply amount adjusting means. 2. The air supply amount control means is connected to an air supply amount detection means for detecting an outside air supply amount supplied from an outside air supply port, and the outside air supply amount detected by the supply air amount detection means. The air conditioner according to claim 1, wherein the outside air supply amount is controlled based on the amount.