JP3389891B2 - Air conditioning system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a primary air conditioner for performing primary air conditioning by introducing outside air at a temperature lower than room temperature, and to a primary air conditioner. Related to an air conditioning system having a secondary air conditioner that introduces air and return air from the room, performs secondary air conditioning according to the indoor conditions, and sends the air to the room. The present invention relates to technology improvement that can achieve miniaturization and cost reduction. 2. Description of the Related Art Conventionally, as shown in FIG. 3, a primary air conditioner 2 for performing primary air conditioning such as outside air cooling by introducing outside air at a temperature lower than room temperature, and this primary air conditioner 2. Description of the Related Art An air conditioning system including a secondary air conditioner 4 that introduces and mixes conditioned air from a room 2 with return air from a room, further air-conditions the room according to room conditions, and blows the room indoors is known. The primary air conditioner 2 has a cooling water coil 2a for cooling and a heating water coil 2b for heating in its main body.
And the blower 2c and the steam humidifier 2d, and the outside air introduced into the primary air conditioner 2
Alternatively, the primary air conditioning process is performed by the hot water coil 2b, and the air is supplied to the main body suction side of the secondary air conditioner 4 through the duct 6 by the blower 2c. A recirculation duct 8 for introducing return air from the room is connected to the main body suction side of the secondary air conditioner 4, and the return air and the harmony from the primary air conditioner 2 on the suction side in the main body. And the mixed air is further mixed with the air.
Cold water coil 4a or hot water coil 4 of secondary air conditioner 4
The secondary air conditioning according to the indoor conditions is performed by b, and the air is supplied indoors by the blower 4c via the blower duct 10. [0004] However, in the above-mentioned conventional air conditioning system, the primary conditioned air cooled by the primary air conditioner 2 is supplied to the secondary air conditioner 4 during the cooling operation. Since the air is supplied to the suction side, the temperature of the inlet air to the chilled water coil 4a of the secondary air conditioner 4 decreases, and as a result, the chilled water return temperature cannot be increased. On the other hand, the hot water return temperature cannot be lowered during the heating operation. That is, if the difference between the return temperature of the hot and cold water cannot be increased, the amount of the hot and cold water to be circulated must be increased in order to perform sufficient heat exchange, and accordingly, the circulation pump and the piping of the hot and cold water must be increased. The initial cost and the running cost of the equipment system such as are increased. Further, for the purpose of dehumidification or humidification, the air once processed by the primary air conditioner 2 needs to be mixed with return air from the room and then processed again by the secondary air conditioner 4, so that There is a problem that the processing air volume of the air conditioner 4 becomes large and the capacity of the blower 4c must be increased. The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an air-conditioning system capable of minimizing the size and cost of equipment such as pumps, pipes, and blowers. Is to do. In order to achieve the above object, according to the present invention, there is provided a primary air conditioner for performing primary air conditioning by introducing outside air, and air and indoor air from the primary air conditioning. An air conditioning system including a secondary air conditioner that introduces return air from the vehicle to perform secondary air conditioning according to indoor conditions and blows air into the room. A harmony machine with a temperature control function that is operated when it is low,
Separate into two systems: a temperature-control-free conditioner operated when the amount of outside air introduced is high, and the air blown out from the temperature-controlless conditioner is joined to the suction side of the secondary air conditioner, The blow-off air of the conditioner with a temperature control function is joined to the discharge side of the secondary air conditioner. [0007] According to the air conditioning system of the present invention having the above configuration, the air processed by the air conditioner with the temperature control function, which is operated when the outside air introduction amount is low, is joined to the outlet side of the secondary air conditioner. Therefore, it does not pass through the cooling and heating coil of the secondary air conditioner, so that the temperature difference between the hot and cold water of the secondary air conditioner can be enlarged, and the cost of the pump and piping equipment can be reduced. In addition, energy saving in transportation can be achieved, which can contribute to a reduction in running cost. In addition, since it is possible to avoid duplication of the introduced outdoor air processing and the indoor load processing, the capacity of the secondary air conditioner can be reduced. [0008] The primary air conditioner is a twin consisting of a conditioner with a temperature control function operated when the amount of outside air introduced is low, and a conditioner without a temperature control function operated when the amount of outside air introduced is high. Because it is a type, the primary air conditioner and the duct system of the primary air conditioner are slightly complicated,
The total capacity does not change, the mechanism of the primary air conditioner for outdoor air cooling is simplified, and the cost impact is not so large. Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a diagram showing a schematic configuration of an entire air conditioning system according to the present invention, and FIG. 2 conceptually shows a configuration of a primary air conditioner which is a main part of the present invention and a connection relationship with a secondary air conditioner. It is a figure explaining easily. The same components as those described in the conventional example of FIG. 3 are denoted by the same reference numerals. [0010] As shown in FIG.
Is the perimeter zone A near the window 14 where the sunlight shines
, A perimeter zone outlet 16 for blowing conditioned air to the perimeter zone A is provided, and an interior zone outlet 18 is provided in the interior zone B. The ceiling 2 has a suction port 2 for guiding air in the living room 11 to an upper space 22 above the ceiling along the window 14.
A suction duct 26 is connected to a suction opening 24 in the space 22 above the ceiling.
6 are provided with airflow exhaust fans 28. Most of the airflow exhaust fans 28 are opened in the ceiling, and the space 22 above the ceiling serves as a return passage for indoor air. An exhaust duct 30 is connected to a part of the air flow exhaust fan 28. The exhaust duct 30 is guided to the air conditioning machine room 32 and is connected to an exhaust fan 34 for external cooling. The air flowing through the exhaust duct 30 is released to the outside air. In the middle of the exhaust duct 30, a balancing box 36 is provided in the space 22 above the ceiling of the living room 11 for adjusting the balance of the flow rate with the return air flowing through the return passage of the space above the ceiling 22. . Further, an exhaust duct 38 having one end open and facing the space above the ceiling 22 and the other end passing through the air conditioning machine room 32 and communicating with the outside is also connected. A cooling exhaust fan 34 is provided. In the air conditioning machine room 32, a primary air conditioner 2 for introducing outside air and performing primary air conditioning is provided.
A plurality of secondary air conditioners 4 for introducing and mixing the conditioned air from the secondary air conditioner 2 and the return air from the room to perform secondary air conditioning according to the indoor conditions and to blow the air into the living room 11 again; Is provided. As shown also in the conceptual diagram of FIG. 2, the main body of each of the secondary air conditioners 4 has a dust filter 4e, a humidifier 4d, a blower 4c, a cold water coil 4a, hot water from its suction side. A coil 4b is provided, and a return air circulation duct 8 connecting the return passage of the under-the-ceiling space 22 is connected to the suction chamber 4f upstream of the dust filter 4e. In the illustrated embodiment, the outlet side of each secondary air conditioner 4 has a perimeter zone chamber 4g and an interior zone chamber 4g.
The air supply duct 10 is provided in each of the blow-out chambers 4g and 4h to connect the perimeter zone outlet 16 and the interior zone outlet 18 of the living room 10, respectively. ing. By the way, the primary air conditioner 2 is operated when the amount of outside air introduced is low.
02 and a harmony device 204 without a temperature control function that is operated when the amount of introduced outside air is high. In other words, the inside of the main body of the primary air conditioner 2 is connected to the outside air introduction duct 40 and has two flow passages 20 downstream from the suction chamber 4f in which the dust filter 4e is built.
0a, 200b, and one of the flow passages 20
0a is provided with a blower 2c, a humidifier 2d, a cold water coil 2a, and a hot water coil 2b, and is configured as an air conditioner 202 with a temperature and temperature control function. Thus, it is configured as an air conditioner 204 without a temperature control function. The above-mentioned harmony device 20 without temperature control function
The air blown out of the secondary air conditioner 4 is connected to the suction-side chamber 4f of the secondary air conditioner 4 via a duct 206 and merged. The secondary air conditioner 4 is connected to the outlet-side supply duct 10 and merged. In the air-conditioning system of this embodiment configured as described above, when the amount of outside air introduced is high, the primary air conditioner 2 is operated on the side of the conditioner 204 without the temperature control function, and
Outside air that has not been temperature-controlled is joined to the suction-side chamber 4f of the secondary air conditioner 4 as it is, mixed with return air from the room, and then subjected to temperature control and humidity control by the secondary air conditioner 4. It is blown out into the living room 11. On the other hand, when the outside air introduction amount is low, the primary air conditioner 2 is operated on the side of the conditioner 202 with the temperature control function, and the primary conditioned air processed by the conditioner 202 with the temperature control function is 2. The air is then merged into the supply duct 10 on the blow-out side of the air conditioner 4. Therefore, the primary conditioned air does not pass through the cold water coil 4a or the hot water coil 4b of the secondary air conditioner 4. Therefore, the difference between the return temperature of the cold and hot water of the secondary air conditioner 4 can be enlarged, and thus the cooling and circulating of the cold water coil 4a or the hot water coil 4b can be performed.
The amount of hot water can be reduced as much as possible, so that the cost of a circulating pump (not shown) for cold / hot water and piping equipment can be reduced. In addition, energy saving in transportation can be achieved, which can contribute to a reduction in running cost. Further, since the processing of the outside air introduced from the outside and the processing of the load of the return air from the room can be avoided, the capacity of the secondary air conditioner 4 can be reduced as much as possible. The primary air conditioner 2 is used as a conditioner with a temperature control function 202 which is operated when the amount of outside air introduced is low.
And the air conditioner 204 without a temperature control function that is operated when the amount of outside air introduced is high, so that the primary air conditioner 2 and the duct system of the primary air conditioner 2 are slightly different. Although it is complicated, the total capacity does not change, the mechanism of the primary air conditioner 2 for cooling outside air is simple, and the cost impact is not so large. As described above in detail, according to the air conditioning system according to the present invention, the air processed by the temperature-adjustable harmony machine operated when the outside air introduction amount is low is the secondary air. Since it joins the outlet side of the air conditioner, it does not pass through the cooling and heating coil of the secondary air conditioner, so that the difference in the temperature of the secondary air conditioner between hot and cold water can be expanded, and the cost of pumps and piping equipment is reduced. Can be achieved. In addition, energy saving in transportation can be achieved, which can contribute to a reduction in running cost. Further, since the overlap between the minimum outside air processing and the indoor load processing can be avoided, the capacity of the air conditioner can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing an entire configuration of an embodiment of an air conditioning system according to the present invention. FIG. 2 is a diagram schematically illustrating the configuration of a primary air conditioner, which is a main part of the present invention, and the connection relationship with a secondary air conditioner, in a manner that is easily understandable. FIG. 3 is a schematic configuration diagram of a conventional air conditioning system, and is a diagram corresponding to FIG. [Description of Signs] 2 Primary air conditioner 2a Cold water coil 2b Hot water coil 2c Blower 2d Humidifier 2e Dust filter 4 Secondary air conditioner 4a Cold water coil 4b Hot water coil 4c Blower 4d Humidifier 4e Dust filter 4f Suction side chamber 8 Reflux duct 10 Supply duct 11 Living room 22 Ceiling space 32 Air-conditioning machine room 202 Conditioner with temperature control function 204 Conditioner 206, 208 without temperature control function Duct

Continuation of the front page (56) References JP-A-4-359721 (JP, A) JP-A-7-260202 (JP, A) JP-A-4-161749 (JP, A) Jpn. , U) Japanese Utility Model Hei 2-114835 (JP, U) Japanese Utility Model Application 54-182538 (JP, U) Japanese Utility Model Application 59-128027 (JP, U) Japanese Utility Model Utility Model 35-18758 (JP, Y1) (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 3/06 F24F 3/052

Claims (1)

(57) [Claims 1] A primary air conditioner for performing primary air conditioning by introducing outside air, and introducing air from the primary air conditioning and return air from a room. An air conditioning system including a secondary air conditioner that performs secondary air conditioning according to indoor conditions and blows air into a room, wherein the primary air conditioner is operated when the amount of outside air introduced is low. The air conditioner is divided into two systems: a harmony device with temperature control function and a harmony device without a temperature control function that is operated when the amount of introduced outside air is high, and the air blown out from the harmony device without the temperature control function is suctioned into the secondary air conditioner. The air-conditioning system is characterized in that the air blown out of the conditioner with the temperature control function is merged with the blow-out side of the secondary air conditioner.