JPH06174259A - Air conditioner - Google Patents

Abstract

PURPOSE:To enable a temperature setting for a floor blowing to be easily carried out and further to enable a comfortable air conditioning to be carried out. CONSTITUTION:An air conditioner 10 is provided with an air conditioner 42 capable of performing a concurrent air blowing from an upper air blowing port 42A and a lower air blowing port 42B and with an air feeding duct 24 mounted at a ceiling and connected to the upper air blowing port 42A. In addition, there are provided a ceiling air blowing device 18 connected to the air conditioner 42 through an air feeding duct 24 and for blowing air into an indoor space 12, an air feeding duct 40 connected to the lower air blowing part 42B, a floor air blowing device 36 connected to the air conditioner 42 and for blowing air into the indoor space 12 and an air suction port 20 for returning air from the indoor space 12.

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 comfortably maintaining the air condition in a living room such as an office building in a middle and high-rise building.

[0002]

2. Description of the Related Art Conventionally, one of the air-conditioning systems for office buildings in middle- and high-rise buildings is a single duct system for each floor. As shown in FIG. 13, the single duct system on each floor is
An air conditioner 400 is installed on each floor, an air supply duct 404 is installed behind the ceiling of an indoor space 402, and air is blown out from a blowout port 406 to perform air conditioning. With such a system, even if the environmental conditions are different for each floor, it is possible to deal with them relatively easily.

[0003]

However, in a modern office space, office equipment such as O / A equipment is placed on the floor, and only a balloon from the ceiling may block the office equipment or the office equipment. The heat exhausted from office equipment such as A-equipment may deteriorate the efficiency of air conditioning.

In consideration of the above facts, an object of the present invention is to obtain an air conditioner in which the temperature of the floor blowout can be easily set.

[0005]

In order to achieve the above object, an air conditioner according to a first aspect of the present invention is provided with a first air conditioner.
And an air conditioner capable of simultaneously blowing air from the second outlet, an air supply duct in the ceiling connected to the first air outlet, and an air conditioner connected to the air supply duct in the ceiling via a room A ceiling blow-out unit for supplying air to the space, the second blow-out port installed under the floor, a floor blow-out unit for supplying air to the indoor space from the air conditioner and under the floor, and return air from the indoor space And a bypass passage through which a part of the return air can reach the second outlet without passing through the heat exchanger of the air conditioner.

An air conditioner according to a second aspect of the present invention is an air conditioner capable of simultaneously blowing air from the first and second outlets, and an in-ceiling air supply duct connected to the first outlets. A ceiling blowout unit that is connected to the air conditioner through the air supply duct in the ceiling to supply air to the indoor space; and the second blowout port installed under the floor.
The air conditioner and a floor blowing unit for supplying air to the indoor space from below the floor, a suction port for returning the return air from the indoor space, and a part of the return air passing through the heat exchanger of the air conditioner. A first bypass passage that can reach the first outlet without doing so, and a second bypass passage that allows a portion of the burr air to reach the second outlet without passing through the heat exchanger of the air conditioner It is characterized by having and.

[0007]

In the air conditioner having the above structure, when the air conditioner operates, the air is blown from the first and second outlets at the same time, and the air is supplied into the ceiling air supply duct connected to the first outlet. Then, air is supplied to the indoor space from the ceiling blowing unit. On the other hand, the air blown from the second outlet is supplied from the floor outlet unit to the indoor space through the underfloor. Next, the air that has once been supplied to the indoor space is returned to the air conditioner through the suction port attached to the ceiling as the temperature rises. At that time, a part of the return air passes through the bypass passage without passing through the heat exchanger, reaches the second outlet, and is sent to the floor outlet unit. Therefore, the temperature of the air blown from the floor blowout unit can be higher than that of the air blown from the ceiling blowout unit. Further, even if air is supplied to the indoor space from both the ceiling blowing unit and the floor blowing unit, and the room temperature distribution is not uniform, the blowing temperature of the floor blowing unit can be set higher than the blowing temperature of the ceiling blowing unit. .

If the first and second bypass passages are provided in the air conditioner and communicate with the first and second outlets,
A part of the return air can reach the first and second outlets without passing through the heat exchanger. Therefore, the blowout temperatures of the ceiling blowout unit and the blowout temperature of the floor blowout unit can be set separately by adjusting the blowout temperatures from the first and second blowout ports, respectively, so that thermal efficiency is high and comfortable air conditioning can be performed. it can.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an indoor space 12 such as an office building and an air conditioner room 14 in a high-rise building where the air conditioner 10 of the first embodiment is installed.

A ceiling blowing unit 18 and a suction port 20 are installed on a ceiling portion 16 in the indoor space 12.
The ceiling blowing unit 18 is connected to the in-ceiling air supply duct 24 via a duct 22. The return air is performed from the chamber 28 in the ceiling, and is returned via the suction port 20. In addition, the temperature sensor 32 is attached to the suction port 20.
Is provided. Several floor blowing units 36 are installed on the floor 34 near the O / A equipment 35.
The floor blowing unit 36 plays a role of facilitating the adjustment of the air volume and ensuring a comfortable living environment of the indoor space 12. Further, the floor blowing unit 36 can be easily relocated, added or removed in case the purpose of the room is changed and the layout needs to be changed.

An air conditioner 42, a blowing chamber 44 and a return air chamber 46 are installed in the air conditioner room 14. In the air conditioner room 14, a space 48 for maintenance of the air conditioner 42 is provided in front of the air conditioner 42.

An upper outlet 42A of the air conditioner 42
Is connected to the blowing chamber 44 via the connection portion 50. The connecting portion 50 is composed of a canvas joint and is made of glass cloth or the like. The lower outlet 42B of the air conditioner 42 has the underfloor air supply duct 40.
Connected with. In the underfloor air supply duct 40, a lower blow-off variable air volume control device 52 is installed near the lower blow-out port 42B. Return port 42 of the air conditioner 42
C is connected to the return air chamber 46 via the duct 54. The blowing chamber 44 is connected to the ceiling air supply duct 24. Inside the ceiling air supply duct 24, an upper blowing variable air volume control device 56 is installed.

Further, as shown in FIG. 2, the air conditioner 42 includes an air filter 58, a heat exchanger 60, an eliminator 62, a blower 64 (shown in FIG. 1), and a bypass path 66 (shown in FIG. 3). , A mixing chamber 70, and an air supply chamber 78. The air filter 58 is composed of a pre-filter 58A and a mini-pleat type medium performance filter 58B. The heat exchanger 60 is composed of a heating coil 60A and a cooling coil 60B. The heating coil 60A is a hot water pipe 60C.
The cooling coil 60B is connected to the cold water pipe 60D. In this embodiment, the floor blowing unit 36 serves to cool the OA load, so that the heating coil 60A does not reach the passage of the floor blowing air.

FIG. 3 shows a perspective view of the bypass passage 66 and the mixing chamber 70. The bypass path 66 is the partition plate 6.
It is separated from the mixing chamber 70 by 8. Partition plate 68
Is provided with an opening and is closed by a partition plate 72 with punching. The upper part of the mixing chamber 70 is partitioned by an intermediate drain pan 74. The intermediate drain pan 74 is provided with a slope toward the center thereof, and an opening for drainage is opened in the center and a pipe 74A is connected thereto. A drain pan 80 having the same structure as the intermediate drain pan 74 is also installed in the lower part of the mixing chamber 70. The heat exchanger 60 is separated from the mixing chamber 70 and the air supply chamber 78 by a lattice-shaped partition plate 76. In addition,
The partition plate 72 may be a variable air volume damper such as a shutter type when the load of the floor blown air varies greatly.

As shown in FIG. 4, the lower blow-off variable air volume control device 52 controls the blow-off air volume from the underfloor air supply duct 40 in accordance with the operation signal of the floor blow-out unit 36. On the other hand, as shown in FIG. 5, the upper air blowing variable air volume control device 56 is connected to the temperature sensor 32 via a signal line 32A, and is connected to the blower 64 via a signal line 56A. The air conditioner 42 is provided with a blower 64, but instead of this, a blower (not shown) is attached to each of the upper blowout port 42A and the lower blowout port 42B, and the upper blown variable air volume control device 56 or the lower blower. It may be connected to the variable air volume control device 52 for blowing.

Next, the operation of the first embodiment will be described.
When the blower 64 is driven, the air in the indoor space 12 is sucked from the return air chamber 46 and flows into the air conditioner 42 from the return air port 42C, and the air supply port 42D (see FIG. 2).
From the outside, the outside air is sucked into the air conditioner 42. The incoming air is filtered through the air filter 58 to remove dust particles in the air. A part of the inflowing air is filtered,
As shown in, when heating, the heating coil 60A in the heat exchanger 60 warms the air, and during cooling,
The cooling coil 60B produces cool air. Each of them passes through the partition plate 76 to reach the air supply chamber 78, further passes through the air outlet chamber 44 from the upper air outlet 42A, and is blown out from the ceiling air outlet unit 18 through the air supply duct 24 in the ceiling.

On the other hand, as shown in FIG. 7, a part of the inflow air that has passed through the air filter 58 does not pass through the heat exchanger 60, but passes through the bypass passage 66. The cold air that has passed through the heat exchanger 60 reaches the mixing chamber 70 from the partition plate 76. The air that has passed through the bypass passage 66 reaches the mixing chamber 70 through the partition plate 72 with punching. Mixing chamber 70
Then, the cold air that has passed through the heat exchanger 60 and the air that has passed through the bypass passage 66 are mixed, and pass through the underfloor air supply duct 40 from the lower outlet 42B to reach the floor outlet unit 36.
Blown out from.

As described above, since the air blown out from the floor blowing unit 36 includes the air that does not pass through the heat exchanger 60, it is higher by about 2 ° C. than the cool air blown out from the ceiling blowing unit 18. Has become.

As a result, the load on the indoor space 12 is relatively stable, and the O / A equipment is installed in a specific area.
When a so-called spot load occurs, the ceiling blowing unit 18 is operated based on a signal from a wide area sensor or a sensor provided in an air conditioning return circuit, and the floor blowing unit 36 is operated based on a signal from a local sensor. The generated heat can be locally treated, and efficient and comfortable air conditioning can be performed.

FIG. 8 shows an interrupt routine when the power of the O / A equipment is input. In step 110, O
When the input state of the power source of the device A is determined and the power source is input, the operation of the most recent floor blowing unit 36 is started in step 111. Next, at step 112, the air volume of the blower 64 is increased by one step. When the power of the O / A equipment is turned off, the operation of the most recent floor blowing unit 36 is stopped in step 113, and then step 114 is performed.
The air volume of the blower 64 is lowered by one step. Above, Step 11
By repeating 0 to 114, even if heat is generated by the operation of the O / A equipment, the cooling is efficiently performed.

Next, a room temperature adjustment subroutine for the indoor space 12 by the upper blown-out variable air volume controller 56 of the first embodiment will be described with reference to FIG. In step 120, the air conditioning temperature of the air conditioner 42 is set. In the next step 122, it is judged whether or not the room temperature measured by the temperature sensor 32 is higher than the set temperature, and if it is judged that the room temperature is higher than the set temperature, the blower 64 in step 124.
Increase the air flow. By repeating the above steps 120 to 124, the room temperature of the indoor space 12 can be maintained at a constant set temperature.

FIG. 10 shows an air conditioner 200 according to the second embodiment and its piping configuration. The air conditioner 200 includes an air conditioner 202 that air-conditions the indoor space 12. The air conditioner 202 includes blowers 641 and 642, an air filter 58, a heat exchanger 60,
It has a ceiling blowing bypass 204, a floor blowing bypass 206, a mixing chamber 70, and an air supply chamber 78. The ceiling outlet bypass passage 204 is installed above the heat exchanger 60 so that the air passing through the air filter 58 can pass therethrough. This ceiling blowing bypass 204
The outlet of is connected to the air supply chamber 78. A damper 204A is provided at this outlet. In addition, the air supply chamber 7
A damper 205 is provided in the central portion of 8 so that the air passing through the heat exchanger 60 can be shut off.

On the other hand, below the heat exchanger 60, a floor blowing bypass 206 is provided. The floor blowing bypass 206 connects the air filter 58 and the mixing chamber 70. A damper 206A is installed near the exit of the floor blowing bypass 206. The heating coil 60A includes a hot water pipe 60C and a cooling coil 60B.
Are connected to the cold water pipe 60D, respectively. A control valve 208 is installed in the hot water pipe 60C, and a blower temperature detection sensor 21 described later is connected by a signal line (not shown).
It is connected to 0. Similarly, a control valve 212 is also installed in the cold water pipe 60D, and is connected to a blower temperature detection sensor 210 described later by a signal line (not shown).

At the upper part of the air conditioner 202, the return air port 20
2A and an air supply port 202B are provided. This return port 2
02A is connected to one end of the duct 216. The other end of the duct 216 is connected to the damper 218. The other end of the duct 216 is connected to the damper 222. On the other hand, the air supply port 202B is connected to the duct 224, and the blower 641 is installed. The duct 224 is provided with a blast temperature detection sensor 214, and the other end of the duct 224 has the ceiling blowing unit 18 at the other end.
Connected with. In addition, the O ・ A placed on the floor 34
A temperature sensor 226 is provided around the device 35. Further, the lower outlet 20 of the air conditioner 202
A blower 642 is installed in 2C. Note that FIG.
The same reference numerals are given to the parts corresponding to those in FIG. 1 and FIG.

Next, the operation of the second embodiment will be described. When the blowers 641 and 642 are driven, the return air in the indoor space 12 flows into the air conditioner 202 from the duct 216 via the return air port 202A, and fresh outside air is air-conditioned from the duct 216 via the return air port 202A. It flows into the machine 202.
These incoming air is filtered through air filter 58. After filtering, a part of the inflowing air is heated by the heating coil 60A in the heat exchanger 60 during heating, and
During cooling, the cooling coil 60B produces cool air. Further, the air passes through the duct 224 from the air supply port 202B and is blown out from the ceiling blowing unit 18. Further, a part of the inflow air after filtering passes through the ceiling blowing bypass passage 204 without passing through the heat exchanger 60, and is blown out from the ceiling blowing unit 18 through the duct 224.

On the other hand, of the inflowing air that has passed through the air filter 58, part of the air that has flowed downward passes through the heat exchanger 60 and becomes warm air during heating and cool air during cooling. On the other hand, the air that has passed through the floor blowing bypass 206 without passing through the heat exchanger 60 is transferred to the heat exchanger 60 in the mixing chamber 70.
Is mixed with the air that has passed through. Then, the mixed air is blown from the floor blow-out unit 36 from the lower blow-out port 202C through the underfloor air supply duct 40.

FIG. 11 shows a room temperature adjustment routine when the indoor space 12 is being cooled by the air conditioner 200 according to the second embodiment. In step 230, the air conditioning temperature of the indoor space 12 is set. Next step 231
Then, it is judged whether or not the room temperature measured by the temperature sensor 32 is higher than the set temperature, and if it is judged that the room temperature is higher than the set temperature, the air volume of the ceiling blowing unit 18 is increased in step 232. Next, in step 233, it is determined whether or not the capacity of the ceiling blowing unit 18 has reached the limit. If it is determined that the limit has been reached, the damper 204A is closed and the damper 205 is opened in step 234. Further, in step 235, it is judged whether or not the adjustment range of the air mixing ratio by the damper operation is exceeded. When it is determined that the temperature has exceeded the limit, the blowing temperature of the air conditioner 202 is lowered in step 236. At that time, the blowing temperature detection sensor 210 detects the blowing temperature of the air conditioner 202, controls the control valve 212, and adjusts the amount of refrigerant flowing into the heat exchanger 60. Also, the ceiling blowing unit 1
If it is determined that the ability of No. 8 has not reached the limit, the process returns from step 233 to step 231.

On the other hand, when it is determined that the room temperature is lower than the set temperature, the air volume of the ceiling blowing unit 18 is reduced in step 237. Next, in step 238, it is determined whether or not the capacity of the ceiling blowing unit 18 has reached the limit. If it is determined that the limit has been reached, the damper 204A is opened in step 239 and the damper 205 is opened.
Close. Next, at step 240, it is judged if the adjustment range of the air mixing ratio by the damper operation is exceeded. If it is determined that the air conditioner has been exceeded, the amount of refrigerant to the cooling coil 60B is reduced in step 241, and the air conditioner 2
Raise the blowing temperature of 02. At that time, the blowing temperature detection sensor 210 detects the blowing temperature of the air conditioner 202, controls the control valve 212, and adjusts the amount of refrigerant flowing into the heat exchanger 60. If it is determined that the ceiling blowing unit 18 has not reached its limit, the process returns from step 238 to step 231. Step 230
By repeating steps 241 to 241, the room temperature of the indoor space 12 can be maintained at a constant set temperature. In addition, damper 2
Open 18 and close damper 222 and damper 205,
The outside air can be supplied from the damper 216, and the outside air can be cooled during the intermediate period. (See Figure 10).

FIG. 12 shows a room temperature adjustment subroutine for the indoor space 12 by the air conditioner 200 according to the second embodiment. In step 250, for example, the local air conditioning temperature around the O / A equipment 35 is set. In the next step 252, it is determined whether or not the local temperature measured by the temperature sensor 226 installed around the O / A device 35 is higher than the set temperature. If it is determined that the local temperature is higher than the set temperature, the damper 20 is determined in step 254.
6A is closed to increase the air volume of the floor blowing unit 36. Next, in step 256, it is determined whether or not the capacity of the floor blowing unit 36 has reached the limit. When it is determined that the limit has been reached, the blowing temperature of the air conditioner 202 is lowered in step 258. When it is determined that the capacity of the floor blowing unit 36 does not exceed the limit, the process returns from step 256 to step 252.

On the other hand, when it is determined that the local temperature is lower than the set temperature, the damper 206 is determined in step 260.
Open A to reduce the air volume of the floor blowing unit 36. Next, in step 262, the floor blowing unit 3
Judge whether the ability of 6 has reached the limit. When it is determined that the limit has been reached, the blowing temperature of the air conditioner 202 is lowered in step 264. When it is determined that the capacity of the floor blowing unit 36 has not reached the limit, the process returns from step 262 to step 252. By repeating steps 250 to 264 above, O · A
The local temperature around the device 35 can be maintained at a constant set temperature.

Further, as in the air conditioner 270 shown in FIG. 13, the heat exchanger may be separated into two, and the upper blowout heat exchanger 272 and the lower blowout heat exchanger 274 may be provided. As a result, even when the indoor space 12 is being heated, the peripheral portion of the O / A device 35 can be locally cooled. In this way, by adopting the air-conditioning method in which the floor blow-out portion takes charge of the local load, the generated heat can be treated near the generation source, and the room temperature of the indoor space 12 can be adjusted more rationally. Note that, in FIG. 13, portions corresponding to those in FIG.

[0032]

Since the present invention has the above-mentioned structure, it has an excellent effect that the temperature of the floor blow-off can be easily set and comfortable air conditioning can be performed.

[Brief description of drawings]

FIG. 1 is a side sectional view of an indoor space in which an air conditioner according to a first embodiment is implemented.

FIG. 2 is a schematic diagram showing an internal structure of an air conditioner.

FIG. 3 is a perspective view of a bypass passage and a mixing chamber.

FIG. 4 is a schematic diagram showing a control system of a variable air volume control device for lower blowing.

FIG. 5 is a schematic diagram showing a control system of a variable air volume control device for upper blowing.

6 is a sectional view taken along line 6-6 of FIG.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is a flowchart showing an interrupt routine when the power of the O / A device is input.

FIG. 9 is a flowchart showing a room temperature adjustment subroutine for the indoor space by the upper air blowing variable air volume control device.

FIG. 10 is a schematic diagram showing an air conditioner according to a second embodiment.

FIG. 11 is a flowchart showing a room temperature adjustment routine of the indoor space by the air conditioning apparatus according to the second embodiment.

FIG. 12 is a flowchart showing a room temperature adjustment subroutine for an indoor space by the air-conditioning apparatus according to the second embodiment.

FIG. 13 is a schematic diagram showing an air conditioner having two heat exchangers.

FIG. 14 is a schematic view showing an indoor space in which a conventional single duct system for each floor is adopted.

[Explanation of symbols]

10 Air Conditioner 12 Indoor Space 18 Ceiling Blow Unit 20 Suction Port 24 Ceiling Air Supply Duct 36 Floor Blower Unit 40 Underfloor Air Supply Duct 42 Air Conditioner 42A Upper Blowout Port (First Blowout Port) 42B Lower Blowout Port (No. 2 outlet) 44 outlet chamber 46 return air chamber 60 heat exchanger 66 bypass passage 200 air conditioner 202 air conditioner 204 ceiling outlet bypass passage (first bypass passage) 206 floor outlet bypass passage (second Bypass path 224 Duct (air supply duct in ceiling) 270 Air conditioner

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shuji Moriyama 1-4-27 Koraku, Bunkyo-ku, Tokyo Within Nikken Sekkei Inc. (72) Inventor Tsutomu Onodera 1-4-7 Koraku, Bunkyo-ku, Tokyo Stock company Nikken Sekkei (72) Inventor Takashi Sato 8-21-1, Ginza, Chuo-ku, Tokyo Stock company Takenaka Corporation Tokyo Main store (72) Inventor Minoru Ogura 8-21, Ginza, Chuo-ku, Tokyo No. 1 Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Hiroshi Suzuki 8-21-1, Ginza, Chuo-ku, Tokyo Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Yamamoto Yorifusa Ginza, Chuo-ku, Tokyo 8-21-1 Takenaka Corporation Tokyo Main Store (72) Inventor Toshihiko Moriyama 8-21-1 Ginza Chuo-ku, Tokyo Takenaka Corporation Tokyo Head Office (72) Inventor Shigeru Nakae 8-21-1, Ginza, Chuo-ku, Kyoto Takenaka Corporation Tokyo Main Store

Claims (2)

[Claims] 1. An air conditioner capable of simultaneously blowing air from first and second outlets, an air supply duct in a ceiling connected to the first air outlet, the air conditioner and the air supply in the ceiling. A ceiling blowout unit connected via a duct for supplying air to the indoor space, the second blowout port installed under the floor, a floor blowing unit for supplying air to the indoor space from the air conditioner and under the floor A suction passage for returning the return air from the indoor space, and a bypass passage for allowing a part of the return air to reach the second outlet without passing through the heat exchanger of the air conditioner. An air conditioner characterized by. 2. An air conditioner capable of simultaneously blowing air from the first and second air outlets, a ceiling air supply duct connected to the first air outlet, the air conditioner and the ceiling air supply. A ceiling blowout unit connected via a duct for supplying air to the indoor space, the second blowout port installed under the floor, a floor blowing unit for supplying air to the indoor space from the air conditioner and under the floor An inlet for returning return air from the indoor space, a first bypass passage through which a part of the return air can reach the first outlet without passing through the heat exchanger of the air conditioner, and the return An air conditioner comprising: a second bypass passage through which a part of the air can reach the second outlet without passing through the heat exchanger of the air conditioner.