JP3069017B2 - 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 which simultaneously heats a plurality of rooms and supplies heated air to a drying room (bathroom).

[0002]

2. Description of the Related Art Conventionally, there is no air conditioner capable of performing room air conditioning and bathroom drying at the same time, and bathroom drying has been performed by equipment provided independently of the air conditioner.

[0003]

Conventionally, the equipment for drying the bathroom has been provided independently of the air conditioner, so that there has been a problem that the equipment cost is high. Therefore, a main object of the present invention is to provide an air conditioner that is inexpensive and allows room air conditioning and bathroom drying.

[0004]

SUMMARY OF THE INVENTION The present invention provides an air supply fan for sucking outside air from outside and return air from a plurality of rooms to be air-conditioned and supplying air-conditioned air to each of the plurality of rooms. , An exhaust fan that discharges return air from each of the plurality of rooms to the outside, a drying air supply passage that connects the outlet of the air supply fan to the drying chamber, and a drying return passage that connects the inlet of the exhaust fan to the drying chamber. An air passage, a heater provided in a drying air supply passage, a first damper for supplying air to the drying chamber, and a second damper for exhausting air from the drying chamber, and the entire required air volume required in each of the plurality of rooms and drying. the sum of the supply amount to be supplied to the chamber is to supply the air volume across multiple rooms by subtracting the excess air volume from the total demand air amount when it exceeds the maximum air charge of the air supply fan, an air conditioner Machine.

[0005]

When air conditioning and drying are performed simultaneously, the first damper and the second damper are opened, and the air supply fan, the exhaust fan, the heater and the like are operated. Then, the air-conditioned air is supplied to a plurality of rooms to be air-conditioned by the air supply fan, and the air heated by the heater is supplied to the drying chamber. At this time, if the total of the required air volume required in each of the plurality of rooms to be air-conditioned and the total amount of air supply to be supplied to the drying room exceeds the maximum supply amount of the air supply fan, the plurality of rooms as a whole are An air volume obtained by subtracting an excessive air volume from the entire required air volume is supplied. An air volume obtained by subtracting a predetermined air volume from a required air volume of the room is supplied to each room, and the air volume to be subtracted is obtained based on a temperature condition and a use condition of each room.

[0006]

According to the present invention, the drying room can be dried by supplying the heated air from the air conditioner to the drying room such as a bathroom, so that equipment for drying the bathroom is separately provided. No need. Therefore, equipment costs can be reduced. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An air conditioner 10 of this embodiment shown in FIGS. 2 and 3 simultaneously air-conditions and dries a plurality (four in this embodiment) of rooms 12a to 12d in a house as shown in FIG. This is applied to an air conditioning system for drying the chamber 13. However, FIG. 1 shows a state in which the bathroom in the house is used as the drying room 13.

[0008] The air conditioner 10 includes a casing 14.
Inside the casing 14, the first chamber 20, the second chamber 22, and the third chamber 2 are separated by a partition wall 16, a total heat exchanger 18, and the like.
4, the fourth room 26, the fifth room 28, the sixth room 30, the seventh room 3
Second, an eighth chamber 34 and a ninth chamber 36 are formed. The partition wall 16 has an opening 38 communicating the first chamber 20 and the second chamber 22, an opening 40 communicating the second chamber 22 and the third chamber 24, and a fifth chamber 28 and the second chamber 22. Opening 4 communicating with
2, an opening 44 connecting the sixth chamber 30 and the seventh chamber 32, an opening 46 connecting the seventh chamber 32 and the eighth chamber 34, and a third
An opening 48 communicating between the chamber 24 and the ninth chamber 36 is formed,
Each of the openings 38, 40, 42, 44, 46 and 48 has an air filter 50, an air supply fan 52, and a damper 5 respectively.
4, a damper 56, an exhaust fan 58 and a damper 60 are attached. A motor 64 that drives the air supply fan 52 and the exhaust fan 58 at the same time and controls the rotation speed by the inverter 62 (FIG. 1) is provided on the partition wall 16 separating the second chamber 22 and the seventh chamber 32. Is attached. Then, a return air port 66 is formed on the left side surface of the first chamber 20,
An air supply port 68 is formed on the right side of the chamber 24, an outside air port 70 is formed on the left side of the fourth chamber 26, and an exhaust port 72 is formed on the left side of the eighth chamber 34. Further, a drying air supply port 74 is formed on the front side of the ninth chamber 36, a drying return air port 76 is formed on the front side of the seventh chamber 32, and a damper 78 is attached to the drying air return port 76. Can be

Further, as shown in FIGS. 1 and 2, the second
The chamber 22 is provided with a humidity sensor 80 and a temperature sensor 82, and the third chamber 24 is provided with a cooling coil 84, a heating coil 86 and a temperature sensor 88 from the upstream side. Then, the electric valves 90 and 92 are attached. And the fourth
In the chamber 26, a wind speed sensor 94 is provided near the outside air port 70, and an air filter 96 is provided near the inlet of the total heat exchanger 18. Further, the ninth chamber 36 has a heating coil 9 for drying.
8 is provided, and an electric valve 100 is attached in association with the heating coil 98 for drying.

[0010] Then, as shown in FIG.
0, temperature sensors 82 and 88, and wind speed sensor 94 are connected to an AI (analog input) terminal 1 of controller 102.
04, the inverter 62 and the electric valves 90 and 92 are connected to an AO (analog output) terminal 106, the inverter 62 is further connected to a DI (digital input) terminal 108, and the dampers 54, 56,
The electric valves 100 and 60 and 78 are connected to a DO (digital output) terminal 110.

On the other hand, an air supply port 112 and a return air port 114 are formed in each of the rooms 12a to 12d in the house, and the air supply port 112 and the air supply port 68 of the air conditioner 10 are connected to an air supply duct 116. The return air port 114 and the return air port 66 of the air conditioner 10 are communicated via a return air duct (not shown). Further, the air supply duct 116 is provided with each room 12a.
12d, the damper 118, the wind speed sensor 120
And a VAV (variable air volume) unit 124 including a control unit 122, and a control unit 1 of each VAV unit 124.
The room thermometer 126 having a temperature sensor 126a and a temperature setting unit 126b is connected to 22. The control unit 122 of each VAV unit 124 operates the operation panel 12
8 is connected to an SI (serial interface) terminal 130 of the controller 102.

An air supply port 132 and a return air port 134 are formed in the drying chamber 13. The air supply port 132 and the air supply port 74 for drying of the air conditioner 10 communicate with each other through an air supply duct 136. Then, the return air port 134 communicates with the drying return air port 76 of the air conditioner 10 via the return air duct 138. Thus, a drying air supply passage is formed between the outlet of the air supply fan 52 and the air supply port 132 of the drying chamber 13, and the drying air supply path is formed between the inlet of the exhaust fan 58 and the return air port 134 of the drying chamber 13. A return air passage is formed.

Further, the temperature sensor 1 is connected to the air supply duct 136.
40 is provided, and a temperature sensor 142 is provided to the return air duct 138.
Are provided, and the temperature sensors 140 and 142 are connected to the AI terminal 104 of the controller 102. In operation, when a heating mode in which the drying chamber 13 is not used (hereinafter referred to as “heating mode”) is selected by the operation panel 128, the electric valve 90 of the cooling coil 84 and the electric valve 100 of the drying heating coil 98 are closed and The electric valve 92 of the heating coil 86 is opened, the dampers 54 and 56 are opened, and the dampers 60 and 78 are closed. Then, the air supply fan 52 and the exhaust fan 58 are driven by the motor 64 at a predetermined rotation speed. Then, each return air opening 114 of the rooms 12a to 12d
The return air sent out of the air conditioner is taken into the first chamber 20 of the air conditioner 10 through a return air duct and a return air port 66 (not shown), and outside air from outside is passed through an external air duct and an outside air port 70 (not shown). The gas is taken into the fourth chamber 26 of the air conditioner 10 and flows through the inside of the air conditioner 10 as indicated by arrows in FIGS. That is, the first
The return air taken into the chamber 20 flows into the second chamber 22 through the air filter 50, and a part is sucked by the air supply fan 52, and the rest is the total heat exchanger 18, the sixth chamber 30, and the damper 56.
Is sucked by the exhaust fan 58 in the seventh chamber 32 through
The return air sucked by the exhaust fan 58 is supplied to the eighth chamber 3
4. The air is exhausted outside through an exhaust port 72 and an exhaust duct (not shown). On the other hand, outside air from the outside is taken into the fourth chamber 26 through the outside air port 70, and after dust is removed through the air filter 96, flows into the second chamber 22 through the total heat exchanger 18, the fifth chamber 28 and the damper 54. Then, the air is sucked by the air supply fan 52. Here, the opening degree of the damper 54 is controlled so that the outside air amount detected by the wind speed sensor 94 (FIG. 1) is equal to or more than the required outside air amount.

Then, the outside air and the return air are mixed in the air supply fan 52, and this air mixture (the ratio of the return air is larger) is blown into the third chamber 24 and reaches a predetermined temperature through the heating coil 86. After being heated, the air is supplied from the air supply port 68 to the rooms 12a to 12d to be air-conditioned through the air supply duct 116. In each VAV unit 124, the required air volume of the corresponding room is calculated based on the temperature difference between the room temperature detected by the temperature sensor 126a of the room thermometer 126 and the set temperature set by the temperature setting unit 126b. The opening degree of the damper 118 is controlled so that the air flow detected by the air conditioner becomes equal to the required air flow.

On the other hand, the drying chamber 1 is operated by the operation panel 128.
When the mode for drying the room 3 and heating the rooms 12a to 12d (hereinafter referred to as "drying / heating mode") is selected, the damper 56 is closed and the dampers 60 and 78 are opened for the state in the heating mode described above. Then, the electric valve 100 of the heating coil 98 is opened, and the damper 54 is adjusted so as to have the maximum outside air amount. Therefore, the return air taken into the first chamber 20 and the fourth chamber 26
The outside air taken into the inside flows as shown by arrows in FIGS. 4 and 5, respectively. That is, a part of the mixture of the outside air and the return air (the ratio of the return air is larger) mixed in the air supply fan 52 is supplied from the air supply port 68 to each of the rooms 12a to 12d through the air supply duct 116. The remainder flows into the ninth chamber 36 through the damper 60, is heated through the heating coil 98, and is then supplied into the drying chamber 13 (FIG. 1) through the drying air supply port 74 and the air supply duct 136.
Further, the air in the drying chamber 13 is sucked by the exhaust fan 58 in the seventh chamber 32 through the return air duct 138, the drying air return port 76 and the damper 78, and the eighth chamber 34, the exhaust port 72 and an exhaust duct (not shown). Is discharged outside through

When the difference between the temperatures detected by the temperature sensors 140 and 142 becomes equal to or less than a predetermined value, it is determined that the drying is completed, the electric valve 100, the dampers 60 and 78 are closed, and the damper 56 is opened. , Damper 54
Is controlled so as to have a required outside air amount. In this drying / heating mode, if the total of the required air volume required in each of the rooms 12a to 12d and the air supply amount to be supplied to the drying chamber 13 exceeds the maximum air supply amount of the air supply fan 52, the room 12a
An air volume obtained by subtracting an excessive air volume from the entire required air volume is supplied to the entirety to 12d.

The operation of controlling the air supply by the controller 102 in the drying / heating mode will be described below with reference to the flowchart of FIG. Note that this control operation is executed by a CPU (not shown) or the like provided in the controller 102. Selecting dry-heating mode by the operation panel 128, first, the whole of each of the required air volume of supply air amount Q and the room 12a~12d to be supplied to the drying chamber 13 in step _{S1 (Q 1 + Q 2 +} Q 3 + Q 4) Is obtained in accordance with the equation (1). here,
The air supply amount Q to be supplied to the drying chamber 13 is a constant value determined based on the size of the drying chamber 13 and the like.
Required air volume of each of _{12d Q 1, Q 2, Q} 3 and Q
₄ is a value obtained by the control unit 122 of the VAV unit 124 based on the temperature deviation between the room temperature detected by the temperature sensor 126a and the required temperature set by the temperature setting unit 126b as described above.

[0018]

A = Q + Q ₁ + Q ₂ + Q ₃ + Q _{4 In the} following step S3, it is determined whether or not the total required air amount A obtained in step S1 exceeds the maximum supply amount Q _max of the supply fan 52. If it is determined not to exceed ( "nO"), the request air volume of each room 12a~12d in step _{S5 Q 1, Q 2, Q} 3 and Q ₄ is the supply amount to be supplied as it is (hereinafter, "target airflow ")
V corresponding to Q ₁ ′, Q ₂ ′, Q ₃ ′ and Q ₄ ′
The data is written to the control unit 122 of the AV unit 124. On the other hand, in step S3, the total required air volume A is equal to the maximum air supply volume Q.
If it is determined that more than _max ( "YES"), step target airflow of each room 12a~12d in _{S7 Q 1 ', Q 2'} , Q 3 ' and Q _4' is the number 2 and number 3
Determined according to the equation, i.e., the wind volume obtained by deducting the volume of air was prorated by the ratio of the required air volume excessive air volume B from the required air volume Q _n is the target airflow _{Q n '(n = 1,2,3,4)} ,
The control unit 122 of the VAV unit 124 corresponding to the value
Is written to.

[0019]

## EQU2 ## B = A-Q _max

[0020]

Equation 3] _{Q n '= Q n - {} B × Q n / (Q 1 + Q 2 + Q
₃ + Q ₄ )｝ (n = 1, 2, 3, 4) In each VAV unit 124, the flow rate detected by the wind speed sensor 120 is determined by the controller 12 in step S5 or S7.
Control unit 1 so that it becomes equal to the target air volume written in
The opening of the damper 118 is controlled by 22.

For example, the amount of air to be supplied to the drying chamber 13
Q is 100, required air volume Q for room 12a₁There are 100 rooms
Required air volume Q of 12b_TwoIs 200, the required air volume of room 12c
Q_ThreeIs 300, the required air volume Q of the room 12d_FourIs 400, salary
Air supply Q of the air fan 52 _maxIs 1000
Then, the total required air volume A is obtained as 1100 from the equation (1).
Accordingly, the excess air amount B is calculated as 100 from the equation (2). I
Therefore, the target air volume Q of the room 12a is obtained from the equation (3).₁'But
90, target air volume Q of room 12b_Two'Is 180, room 12
target airflow Q of c_Three'Is 270, target air volume Q of room 12d
_Four'Is determined to be 360. These target air volumes Q₁′,
Q_Two', Q_Three'And Q_Four'Is each room 12a, 12b,
12c and 12d, the actual air supply amount C
Is calculated to be 1000 from the equation (4).
Maximum air supply Q_maxMatches.

[0022]

C = Q + Q ₁ ′ + Q ₂ ′ + Q ₃ ′ + Q ₄ ′ When the cooling mode or the drying / cooling mode is selected by the operation panel 128, the cooling coil 84 is operated instead of the heating coil 86. However, other operations are substantially the same as those in the above-described heating mode or the drying / heating mode, and thus the description thereof is omitted.

According to this embodiment, since the air heated by the heating coil 98 is supplied to the drying chamber 13 to dry the drying chamber 13, it is not necessary to separately provide a drying facility. Therefore, there is no need for a drying facility or a duct that penetrates the outer wall for the drying facility, and the facility cost can be reduced. In addition, since the mixture of the outside air and the return air (the ratio of the return air is larger) is supplied to the drying chamber 13, the influence of climate change can be reduced, and therefore, the drying chamber 13 can be stabilized. Can be dried.

Further, the return air from the drying chamber 13 has high humidity, and this return air is exhausted by the exhaust fan 58 to the eighth chamber 3.
4. Since the air is directly discharged to the outside through the exhaust port 72, the components of the air conditioner 10 are not affected at all. In addition,
In the above embodiment, when the total required air volume A has exceeded the maximum air charge Q _max, for all rooms 12 a to 12 d, but so as to supply the air volume obtained by subtracting a predetermined air amount from the required air volume, For example, a priority room setting switch is provided in the room thermo 126, and an air volume equal to the required air volume is supplied to a room where the priority room setting switch is turned on, and an air volume obtained by subtracting a predetermined air volume from the required air volume is supplied to other rooms. You may do so.

As a matter of course, the present invention can be used not only when the bathroom is used for the drying room but also for heating the bathroom.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing an air conditioning system to which an embodiment of the present invention is applied;

FIG. 2 is an illustrative view showing one embodiment of the present invention;

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is an illustrative view showing a flow of air in a drying / heating mode;

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a flowchart showing an air supply amount control operation in a drying / heating mode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Air conditioner 12a-12d ... Room 13 ... Drying room 52 ... Air supply fan 58 ... Exhaust fan 74 ... Drying air supply opening 76 ... Drying return air opening 124 ... VAV unit 126 ... Room thermo

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Isamu Tanabe 5-1-1, Mami Minami, Koryo-cho, Kitakatsuragi-gun, Nara Prefecture Inside Tanabe Giken Co., Ltd. (72) Inventor Shuzo Akita Hirade Kogyo Co., Ltd. Housing complex 28: Kubota Train Co., Ltd. Tochigi Plant (72) Inventor Masaaki Shinohara Uchinomiya City, Tochigi Prefecture 28 Tochigi Plant Co., Ltd. (72) Inventor Ken Nakano 28: Hirade Industrial Park, Utsunomiya City, Tochigi Prefecture Kubota Train 28 Inside the Tochigi Plant (72) Inventor Shogo Tomita 28 Hirade Industrial Park, Utsunomiya City, Tochigi Prefecture Inside Kubota Train Co., Ltd. (72) Toshikazu Okumura 1-1-1, Hama, Amagasaki City, Hyogo Prefecture Kubota Corporation Inside the Technology Development Laboratory (72) Inventor Masafumi Inoue 1-1-1 Hama, Amagasaki City, Hyogo Prefecture Kubota Corporation Operative development in the Laboratory (56) Reference Patent flat 5-272841 (JP, A) JitsuHiraku flat 7-6680 (JP, U) (58 ) investigated the field (Int.Cl. ^7, DB name) F24F 3 / 044

Claims (1)

(57) [Claims] An air supply fan for sucking outside air from outside and return air from a plurality of rooms to be air-conditioned and supplying air-conditioned air to each of the plurality of rooms; An exhaust fan that discharges return air from outside to the outside; a drying air supply passage that communicates an outlet of the air supply fan with a drying chamber; a drying return air passage that communicates an inlet of the exhaust fan with the drying chamber; A heater provided in the air supply passage for drying, a first damper for supplying air to the drying chamber, and a second damper for exhausting air from the drying chamber, and a total required air volume required in each of the plurality of rooms; When the sum of the air supply amount to be supplied to the drying chamber exceeds the maximum air supply amount of the air supply fan, an air amount obtained by subtracting an excessive air amount from the entire required air amount is supplied to the entire plurality of rooms. to the air conditioner.