JP3095201B2 - 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 air conditioner, and more particularly to an air conditioner for introducing conditioned air into a house.

[0002]

2. Description of the Related Art In a house, ventilation inside and outside of the house and air conditioning inside the house are required, and various systems for ventilation and air conditioning have been conventionally provided. As a conventional residential ventilation system, an air inlet that introduces underfloor air into a corridor as a common space communicating with each room, and an exhaust port that exhausts the supplied underfloor air from the ceiling are provided. For example, there is a known type in which a ventilation fan is provided for each room in which air inside a kitchen, a toilet, a bathroom, or the like is easily contaminated. In this ventilation system, air from under the floor, which is relatively clean and has little temperature fluctuation, is introduced into the corridor. In addition, each room where natural ventilation is difficult can be forcibly ventilated by a ventilation fan.

Conventionally, a residential air conditioning system has an indoor unit provided in each room and an outdoor unit connected to one or a plurality of indoor units. And air conditioning is performed for each room.

[0004]

In the conventional ventilation system described above, if ventilation is performed for each room with a ventilation fan, the air pressure balance of the whole house is broken, and the space where the ventilation fan is operated has a lower pressure than the other spaces. Become. Therefore, not only the draft wind flows in from the gaps in the windows, so that the comfort is impaired, but also the air including the outside air flows in from the shared space such as the corridor. For example, when a ventilation fan is operated in a kitchen facing a corridor, air flows in from the corridor through the partition door, and the corridor has a negative pressure. For this reason, there is a possibility that contaminated air may flow from the toilet, bathroom, or other room facing the corridor into the kitchen operated by the ventilation fan through the corridor.

[0005] Further, in the conventional air conditioning system, since the indoor units are arranged in each room, each room is air-conditioned and becomes comfortable. However, the common space communicating with each room such as a corridor or stairs is not air-conditioned, and the temperature difference between each room and the common space increases in summer or winter, thereby deteriorating the comfort of the common space. In addition, since each room is individually air-conditioned, energy consumption for air-conditioning of the entire house increases.

It is an object of the present invention to reduce the pressure difference in a house and reduce the inflow of air from other rooms. It is another object of the present invention to reduce a temperature difference between each room and a common space so that a comfortable environment can be provided in a house regardless of the season. Yet another object of the present invention is to allow the entire house to be air-conditioned with low energy consumption.

[0007]

An air conditioner according to a first aspect of the present invention is an air conditioner for introducing conditioned air into each room in a house, comprising an air intake section for taking in underfloor air of the house. , and a temperature control means for maintaining the temperature of the underfloor air taken by the air intake portion in the predetermined range, the underfloor air and the air conditioning unit for an air conditioner, a floor air harmonized with the air-conditioning unit wherein An air introduction unit that introduces air into the common space that communicates with each room in the house, and a simultaneous intake / exhaust ventilation fan or exhaust ventilation that exhausts room air directly out of the house for each room
And a fan, the harmonized underfloor air via said common space from the air conditioning unit is introduced into the room, so as to exhaust the residential out from each room.

[0008] The air conditioner according to claim 2 is claim 1.
In the air conditioner described in (1), the air conditioner further includes dehumidifying means for dehumidifying the underfloor air taken in by the air intake. The air conditioner according to claim 3 is claim 1.
Or in the air conditioner according to 2, the air conditioner,
The air conditioner further includes a selection unit for selecting whether to supply the underfloor air taken in by the air intake unit directly to the air introduction unit or to supply the underfloor air conditioned by the temperature control means to the air introduction unit.

[0009] The air conditioner according to claim 4 is claim 1.
In the air conditioner according to any one of the above, the air conditioner is disposed in a space under the floor or a space under the stairs of the house. An air conditioner according to a fifth aspect is the air conditioner according to any one of the first to fourth aspects, wherein the air introduction unit introduces air into the common space from a riser of a stair in a house.

[0010]

In the air conditioner according to the first aspect, when the underfloor air is taken in by the air intake section, the temperature of the underfloor air taken in by the temperature control means is maintained in a predetermined range in the air conditioning section. Harmonized. The air-conditioned underfloor air is introduced into the common space by the air introduction unit. As a result, the common space is air-conditioned and pressured by the air-conditioned underfloor air. Then, the air in the common space, which is air-conditioned and made positive pressure, is, for example, a gap in a partition door,
The air is supplied to a room communicating with a ventilation port provided in the partition door, a ventilation port provided in the partition wall, and the like, and the air in the room is air-conditioned and has a positive pressure. Here, the pressure difference between the common space and each room is reduced because the common space and the rooms communicating with it can be forcibly supplied to each room in the house by forcing fresh air conditioned from under the floor to each room. However, even if the inside of a room is forcibly exhausted by a ventilation fan, it is possible to reduce the entry of outside air into the room or the entry of contaminated air from another room. In addition, since the common space and each room can be air-conditioned by the air-conditioned underfloor air, the temperature difference between the common space and each room is reduced, and a comfortable environment can be provided in the house regardless of the season. Furthermore, since the underfloor air with less temperature fluctuation is air-conditioned, the entire house can be air-conditioned with less energy consumption.

In the air conditioner according to the second aspect, the air dehumidified by the dehumidifying means is introduced into the common space.
Here, since the dehumidified air is introduced into the common space, the humidity of the air is reduced, and the interior of the house can be made more comfortable during high humidity periods such as during the rainy season or summer. Claim 3
In the air conditioner described in (1), when the temperature of the underfloor air is within a predetermined range, for example, in autumn or spring, the underfloor air taken in by the air intake unit by the selection unit is directly supplied to the air introduction unit. In addition, when the temperature is outside the predetermined range, such as in summer or winter, the air maintained at a predetermined temperature by the temperature control means by the selection unit is supplied to the air introduction unit. here,
Since the underfloor air or the air-conditioned underfloor air can be selected according to the temperature of the underfloor air, the entire house can be efficiently air-conditioned.

In the air conditioner according to the fourth aspect, since the air conditioner is disposed in the space under the floor or the space under the stairs, the dead space can be effectively used and the living space does not decrease. In the air conditioner according to claim 5, air is introduced into the common space from the riser of the stairs. here,
No extra space is required for installing the air introduction part, and the living space is not reduced. Furthermore, since the air introduction part is not arranged in the passage, there is no problem in strength, and the appearance is good.

[0013]

Referring to FIG. 1, a house 1 according to an embodiment of the present invention has a two-story structure. On this first floor,
A dining room 3 and a living room 4 are arranged across a corridor 2 as a common space. A Japanese-style room 5 is arranged behind the living room 4. Corridor 2 has stairs 6
Is arranged. The stairs 6 lead to a corridor 7 on the second floor. A room 8 is arranged around the corridor 7 on the second floor. The partition doors 12 facing the corridors 2 and 7 of the rooms 3, 4 and 8 are provided with ventilation openings 10 and 11 for letting air in and out of the corridors 2 and 7. Here, ventilation holes 10 and 11 are provided in order to increase the communication between corridors 2 and 7 and rooms 3, 4, and 8. Are communicated in the gap between the partitioning door and the opening frame of the door, so that the ventilation ports 10 and 11 are not necessarily required. Or you may provide a ventilation opening in a partition wall. Further, each of the rooms 3, 5, and 8 has a simultaneous supply / exhaust ventilation fan 20 that can simultaneously supply and exhaust air, and each of the rooms 3, 5, and 8
And an air-conditioning indoor unit 24 for individually air-conditioning. Outside the house, an outdoor unit (not shown) connected to the air-conditioning indoor unit 24 by air-conditioning piping and electric wiring is individually provided. In addition, on the ceiling of the second floor,
The exhaust port 21 is connected to a ventilation chimney 23 provided on a roof by a duct 22.

On the other hand, an underfloor ventilation opening 25 is provided in the cloth foundation under the floor around the house 1. In addition, an underfloor ventilation opening 26 is provided in the cloth foundation under the floor in the house 1, so that mutual air can flow under the floor. An indoor unit 30 of the air conditioner according to one embodiment of the present invention is mounted under the floor of the stairs 6. The air conditioner
The outdoor unit 31 is of a heat pump type capable of cooling and heating, and is disposed outside the house 1. The outdoor unit 31 is connected to the indoor unit 30 by electric wiring and an air conditioning pipe 32 for refrigerant. The outdoor unit 31 includes a heat exchanger, a compressor, and a cooling fan (both not shown).

The simultaneous supply / exhaust ventilation fan 20 exchanges fresh air from the outside with heat in the room to cool or heat it and introduce it into the room, and also discharges contaminated air from the room to the outside. Here, since exhaust and air supply are performed at the same time, stable ventilation can be performed even in a room with a high degree of sealing. Also, since air is supplied by performing heat exchange during cooling or heating, the inflowing air is cooled during cooling and heated during heating. As a result, even if the air is exhausted during cooling and heating, the heat is recovered, so that the energy saving effect is high.

As shown in FIG. 2, the indoor unit 30 includes an indoor unit main body 33 and an air introducing section 34 disposed on the indoor unit main body 33. The indoor unit main body 33 is disposed under the floor so that air under the floor can be easily taken in. The indoor unit main body 33 includes an air intake 35 with a filter for taking in under-floor air, a heat exchanger 36 disposed opposite to the back side of the air intake 35, and an air intake across the heat exchanger 36. It mainly has an inlet 35 and a blower fan 37 arranged on the opposite side. An operation panel 38 (FIG. 1) installed in the corridor is connected to the indoor unit 30. Heat exchanger 36
Is connected to the compressor and the heat exchanger of the outdoor unit 31 via the air conditioning pipe 32. The blower fan 37 can variably adjust the amount of blown air according to the set operation mode. The air introduction unit 34 has a blowout port 40 arranged on the lowermost riser 50 of the stairs 6 and a blower duct 41 that guides the air blown from the indoor unit main body 33 to the blowout port 40. . Here, the air introduction part 34 is arranged in the dead space below the stairs 6 and the air is supplied from the riser 50. Therefore, even if the air conditioners are installed, these occupy the living space in the room. Not done.

The air conditioner has an air conditioning control unit 45 as shown in FIG. The air-conditioning control unit 45 controls the operation of the air-conditioning apparatus.
It is composed of a microcomputer including M, ROM, I / O interface and the like. The air-conditioning control unit 45 includes an input key group 46 in an operation panel 38 arranged in the corridor 2,
A temperature sensor 47 and a display unit 48 for displaying various information are connected. Further, the blower fan 37 of the indoor unit 30, the outdoor unit 31, and other input / output units are also connected.

Next, the air conditioning operation of the above embodiment will be described with reference to the control flowchart shown in FIG. When the power switch arranged on the operation panel 38 is turned on, initial settings are made in step S1. In this initial setting, for example, three-stage set temperatures T1 to T3 described later are set to initial temperatures (for example, T1 = 28, T2 = 25, T3 = 1).
5) is set.

In step S2, it is determined whether the dehumidification mode is set. If the dehumidification mode has been set, the process proceeds to step S3, and a dehumidification operation is performed. In the dehumidifying operation, the blower fan 37 is operated at 200 m ³ / hr, and the outdoor unit 31 is slightly operated. Step S
If it is determined in step 2 that the dehumidification mode is not set, the process proceeds to step S4. In step S4, the input key group 46
It is determined whether or not the three temperatures T1 to T3 have been input by the operation of. Here, the temperatures T <b> 1 to T <b> 3 are temperatures for switching the air-conditioning apparatus to each of the cooling operation mode, the first ventilation operation, the second ventilation operation, and the heating operation mode.
When these operation modes are set, the air volume of the blower fan 37 is set accordingly.

If the temperature has not been set in step S4, the process proceeds to step S5. In step S5, the measured temperature T of the temperature sensor 47 is taken. In step S6, it is determined whether the measured temperature T is higher than the temperature T1. In step S7, it is determined whether the measured temperature T is lower than the temperature T1 and higher than the temperature T2. In step S8,
It is determined whether the measured temperature T is lower than the temperature T2 and higher than the temperature T3. In step S9, it is determined whether the measured temperature T is lower than the temperature T3. In step S10, a predetermined time is waited. This time is for determining the interval of the temperature measurement, and is, for example, about 10 minutes.

When it is determined in step S4 that the temperature setting has been input, the flow shifts to step S11. Step S1
In step 1, the inputted three-stage temperatures T1 to T3 are set. When it is determined in step S6 that the measured temperature T is higher than the temperature T1, that is, the temperature of the corridor 2 is high, the process proceeds to step S12. In step S12, a cooling operation is performed. Here, the underfloor air is cooled to a predetermined temperature so as to maintain the temperature of the corridor 2 at around 28 degrees. At this time, the blower fan 37 of the indoor unit 30 is operated at, for example, 200 m ³ / hr.
As a result, the indoor unit 30 air-conditions the air under the floor, and the air-conditioned air is introduced into the corridor 2 from the outlet 40. Then, the air introduced into the corridor 2 is introduced into the rooms 3, 4, and 5 on the first floor via the corridor 2, and further introduced into the room 8 on the second floor via the stairs 6 and the corridor 7. As a result, the common spaces such as the corridors 2 and 7 and the stairs 6 and the interior of each room are air-conditioned and positive pressure. Therefore, contaminated air does not enter from other rooms through the corridors 2 and 7. In addition, common space and each room 3-5,
The temperature difference between the house and the house is reduced, and the comfort inside the house is maintained. Furthermore, since the underfloor air with relatively small temperature fluctuations is air-conditioned, the energy required for air-conditioning can be kept low.

In this state, if a meal is prepared in the dining room 3, for example, the air in the dining room 3 is contaminated. In this case, the simultaneous supply / discharge ventilation fan 20 of the dining room 3 is operated. Then, while the indoor air is maintained at a positive pressure, the dirty air in the room is quickly discharged to the outside,
Fresh air is introduced into the room from the outside. At this time, since fresh air is introduced from the outside and air is also introduced from the corridor 2, the ventilation capacity is dramatically improved. In addition, since a pressure difference between the inside and outside of the room hardly occurs, it is possible to prevent the contaminated air from another room from flowing into the hallway 2 and prevent the partition door from being difficult to open and close.

When it is determined in step S7 that the measured temperature T is between the temperature T1 and the temperature T2, step S13 is performed.
Move to In step S13, the first blowing operation is performed.
In the first air blowing operation, the air blowing fan 37 is operated at, for example, 300 m ³ / hr in order to perform ventilation and slightly cool the room, and the outdoor unit 31 is not operated. If it is determined in step S8 that the measured temperature T is between the temperature T2 and the temperature T3, the process proceeds to step S14. In step S14, the second
Perform the ventilation operation. In the second ventilation operation, the ventilation fan 37 is operated at, for example, 150 m ³ / hr to perform only ventilation, and the outdoor unit 31 is not operated.

If it is determined in step S9 that the measured temperature T is lower than the temperature T3, the process proceeds to step S15. In step S15, a heating operation is performed. Here, the underfloor air is heated so that the temperature of the corridor 2 is maintained at around 15 degrees. In the heating operation, the outdoor unit 31 absorbs outdoor heat to warm the underfloor air to a predetermined temperature. At this time, the blower fan 3 of the indoor unit 30
7 is operated, for example, at 150 m ³ / hr.

The first and second air blowing operations and the heating operation described above are performed.
In the same way as in the case of cooling operation, the corridors 2, 7 and stairs 6 are shared.
The interior space and the interior of each room are made positive pressure. Because of this
No contaminated air enters from other rooms through lower 2,7
No. Also, the temperature difference between the common space and each of the rooms 3 to 5 and 8 is small.
And the comfort inside the house is maintained. Where the example
For example, the total floor area of the building is 120m^Two, The gap equivalent area is 5
cm^Two/ M ^TwoThen, the air volume is 300m^Three/ Hr of air
When introduced from the indoor unit 30, the pressure difference between the inside and outside of the house is 0.18
mmAq. This is approximately 2 m / sec when converted to wind pressure.
c, preventing entry of contaminated air by wind pressure from outside
I do. In addition, this air volume stabilizes the required ventilation volume of each room
The air in each room is always clean.

At the time of contamination, the simultaneous supply and exhaust ventilation fan 20
Is operated, for example, if the ventilation volume of the simultaneous supply / discharge ventilation fan 20 is set to 200 m ³ / hr, and the supply air volume entering the room by the indoor unit 30 is set to 150 m ³ / hr, the ventilation capacity is 35 in total.
0 m ³ / hr. However, the ventilation fan of the conventional exhaust type, when the exhaust capacity of the exhaust fan and 200 meters ³ / hr, the ventilation capacity as was pumped air from the indoor unit 30 150m ³ / hr becomes 200m ³ / hr.

As described above, by using the simultaneous supply / discharge ventilation fan 20 in addition to the indoor unit 30, the ventilation capacity can be remarkably improved. If it is not necessary to improve the ventilation capacity, the indoor unit 30 and the simultaneous supply / discharge ventilation fan 20
Capacity can be reduced, and the entire system can be downsized. [Other Embodiments] (a) The position of the outlet 40 is the riser 50 of the stairs 6.
It is not limited to this, but may be anywhere as long as it faces a common space communicating with each room. (B) The installation position of the indoor unit 30 is not limited to under the floor,
Any location that can take in underfloor air may be used. However, it is preferable to effectively use a dead space such as a space under the floor or a space under the stairs. (C) In the above embodiment, the simultaneous supply and exhaust ventilation fan 20 is provided in each room.
However, the effect of the present invention can be obtained even when a ventilation fan dedicated to exhaust is provided in the room. In this case, even if the ventilation fan is operated, the air is sent into the room by the indoor unit 30 and the pressure in the room can be prevented from lowering. Therefore, as described above, the inflow of contaminated air from another room and the inflow of air from the outside can be prevented.

[0028]

As described above, in the air conditioner according to the first aspect of the present invention, fresh air air-conditioned from under the floor is forcibly supplied to each room in the house, and the common space and the room communicating therewith. The pressure difference between the common space and each room is reduced, and even if the interior of a room is forcibly exhausted by a ventilation fan, outside air may enter the room or air contaminated from other rooms. Can be reduced. In addition, since the common space and each room can be air-conditioned by air-conditioned underfloor air, the temperature difference between the common space and each room is reduced, and the temperature difference inside the house is reduced, making the house comfortable regardless of the season. be able to. Furthermore, since the underfloor air with less temperature fluctuation is air-conditioned, the entire house can be air-conditioned with less energy consumption.

In the air conditioner according to the second aspect, since the dehumidified air is introduced into the common space, the humidity of the air is reduced, so that the inside of the house is more comfortable in a high humidity period such as the rainy season or summer season. Can be In the air conditioner according to the third aspect, the underfloor air or the air-conditioned underfloor air can be selected according to the temperature of the underfloor air, so that the entire house can be efficiently air-conditioned.

In the air conditioner according to the fourth aspect, since the air conditioner is disposed in the space under the floor or the space under the stairs, the dead space can be effectively used, and the living space does not decrease. In the air conditioner according to the fifth aspect, an extra space for installing the air introduction unit is not required, and the living space is not reduced. Furthermore, since the air introduction part is not arranged in the passage, there is no problem in strength, and the appearance is good.

[Brief description of the drawings]

FIG. 1 is a sectional view of a house employing one embodiment of the present invention.

FIG. 2 is a partial perspective view showing an installation position of an indoor unit.

FIG. 3 is a block diagram showing a configuration of a control system.

FIG. 4 is a flowchart illustrating a control operation of an air conditioning control unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 House 2 Corridor 3,4,5,8 Room 6 Stairs 30 Indoor unit 31 Outdoor unit 33 Indoor unit main body 34 Air introduction part 35 Air intake 45 Air conditioning control part 50 Raised board

Continuation of front page (72) Inventor Hiroshi Komai 1-1-4 Shinsenri Nishimachi, Toyonaka-shi, Osaka National Housing Industry Co., Ltd. (56) References JP-A-4-257635 (JP, A) JP-A-5 172371 (JP, A) JP-A-4-106333 (JP, A) JP-A-7-102795 (JP, A) JP-A 7-158897 (JP, A) JP-A-57-64524 (JP, U) ) Japanese Utility Model 3-10117 (JP, U) Japanese Utility Model 4-103539 (JP, U) Japanese Utility Model 6-69624 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1 / 00,3 / 00

Claims (5)

(57) [Claims] 1. An air conditioner for introducing conditioned air into each room in a house, comprising: an air intake section for taking in underfloor air of the house; and a temperature of underfloor air taken in by the air intake section. An air conditioner for air conditioning the underfloor air, comprising: a temperature control means for maintaining the temperature in the range; and an air introduction for introducing the underfloor air conditioned by the air conditioner into a common space communicating with each room of the house. And simultaneous exhaust to discharge indoor air directly out of the house for each room
An air conditioner comprising: a ventilation fan or a ventilation fan dedicated to exhaust , wherein the conditioned underfloor air is introduced from the air conditioning unit to each room through the common space, and is exhausted from each room to outside the house. 2. The air conditioner according to claim 1, wherein said air conditioner further comprises a dehumidifying means for dehumidifying underfloor air taken in by said air intake unit. 3. The air conditioning unit according to claim 1, wherein the underfloor air taken in by the air intake unit is directly supplied to the air introduction unit, or the underfloor air conditioned by the humidity control unit is supplied to the air introduction unit. Further comprising a selection unit for selecting
The air conditioner according to claim 1 or 2. 4. The air conditioner according to claim 1, wherein the air conditioner is disposed in a space under the floor or under a staircase of the house. 5. The air conditioner according to claim 1, wherein the air introduction unit introduces air into the common space from a riser of a stair in the house.