JPH0370145B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <<Field of Industrial Application>> The present invention relates to an air conditioning system mainly composed of a general-purpose air-cooled heat pump package.

<<Prior Art>> General-purpose air-cooled heat pump packages are widely used in offices and the like due to their low price and ease of operation and management.

<<Problems to be Solved by the Invention>> However, due to the low performance of the filter and humidifier that are standard equipment in general-purpose air-cooled heat pump packages, it is not possible to ensure a sufficiently sanitary environment. In addition, since outside air and return air from the room are taken directly into the package, the air conditioning energy consumption coefficient is relatively high, making it difficult to call this an economical air conditioning system.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a sanitary and economical air conditioning system.

<<Means for Solving the Problems>> In order to achieve the above object, the air conditioning system according to the present invention is equipped with a humidifier and a dust collector separately provided in connection with a general-purpose air-cooled heat pump package, and a separate humidifier and dust collector are attached to the package. In this case, an outside air cooling unit and a total heat exchange unit are connected in series, and during heating and cooling, the outside air taken into the total heat exchange unit is heat-exchanged with approximately the same amount of return air from the room and precooled. - preheated and then mixed with a large amount of return air from the room in the outside air cooling unit,
The air is then sent to the general-purpose air-cooled heat pump package, cooled and heated to a predetermined temperature, and then supplied into the room.

<<Example>> Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The system of the present invention is basically configured with a general-purpose air-cooled heat pump package 1, and this package 1 has a built-in cooling/heating device 2 as is well known, and this cooling/heating device 2 circulates refrigerant through a coil 3. The air sucked in is brought into contact with this coil 3 to exchange heat, and the air is configured to exhaust cooled air during cooling and heated air during heating through an upper fan 4.

An advanced dust collector 5 such as an electrostatic precipitator, preferably a cassette type device that is easy to maintain, is connected to the intake side of the package 1, so that the air sucked into the package 1 is purified. ing. Further, a humidifier 6 with high humidification efficiency is attached to the exhaust side of the package 1, and is configured to moderately humidify cooled air or heated air and exhaust it into the room.

An outside air cooling unit 7 and a total heat exchange unit 8 are connected in series to this package 1. This outside air cooling unit 7 includes a return air fan 9 and three motor dampers 10a to 10a in a rigid chamber.
10c is provided, and by making it rigid, the system occupies a small area and aims to be advantageous in terms of space. The total heat exchange unit 8 has two fans 11a, 11b for intake and exhaust, and two motor dampers 12a, 12b, and a rotary total heat exchanger 13 installed therebetween.

Next, the connection relationship between the heat pump package 1, the outside air cooling unit 7, and the total heat exchange unit 8 will be explained with reference to FIG. The first damper 12a of the total heat exchange unit 8 is connected to the outside air introduction path 1.
The second damper 12b is connected to the room air recirculation path 15a to open and close it. On the other hand, the first fan 11a in the total heat exchange unit 8 discharges the heat-exchanged internal air to the outside, and the second fan 11b supplies the heat-exchanged internal air to the outside air cooling unit 7. It is composed of

The outside air cooling unit 7 is divided into upper and lower chambers, and the upper and lower chambers 16 are divided into upper and lower chambers by opening and closing the first damper 10a.
a and 16b are communicated and cut off. A fan 9 is housed in the upper chamber 16a, one side wall of this chamber is communicated with the indoor air recirculation path 15b, and the other side wall is provided with a second damper 10b, and when this damper 10b is opened, this Air inside the room is now exhausted outside. On the other hand, the lower chamber 16b is communicated with the outside air cooling unit 7 at one side wall, and with the dust collector 5 at the other side wall. Also,
This lower chamber 16b is provided with an outside air introduction passage 17 via a third damper 10c, and communicates with or is cut off from this passage 17 by opening and closing the third damper 10c.

Next, to describe its operation, during cooling operation in summer, the first and second dampers 12a and 12b of the total heat exchange unit 8 are
and the first damper 10a of the outside air cooling unit 7
, and close the second and third dampers 10b and 10c of the outside air cooling unit 7. The total heat exchange unit 8 receives, for example, 20% of the total amount of air supplied into the room.
20% of the indoor recirculated air is introduced through the second damper 12b. The high-temperature outside air is pre-cooled by the low-temperature return air from the room by the total heat exchanger 13, and for example, half of the air, that is, an amount of air corresponding to the amount of return air is discharged outside by the fan 11a. . The precooled outside air is then sent to the outside air cooling unit 7, mixed with air in an amount corresponding to, for example, 80% of the recirculated air from the room, and sent to the general-purpose package 1 through the dust collector 5.
Inside the package 1, an air conditioner 2 is operated to lower the air to a predetermined temperature, and then the cooled air is supplied into the room through a humidifier 6.

During heating operation in winter, the dampers 12a, 12b, 10a are opened and the other dampers 10b, 10c are closed, as in the case of FIG.
Then, the heating machine 2 is operated instead of the cooling machine in the general-purpose package 1, and the only difference from the cooling operation is in this point.

On the other hand, during the intermediate seasons (April-May, September-October), the air conditioner 2 in the package 1, which consumes a large amount of electricity, is not operated, and the cold outside air is used for cooling. Therefore, as shown in FIG. 4, the second and third dampers 10b and 10 of the outside air cooling unit 7
c, and open the other dampers 10a, 12a, 12b.
is closed, all of the indoor recirculated air is supplied to the outside air cooling unit 7, and exhausted to the outside through the second damper 10b. On the other hand, the outside air is supplied to the third damper 10c.
All outside air is supplied to the cooling unit 7 through the air conditioning unit 7, and from there, it is supplied into the room through the dust collector 5, the general-purpose package 1, and the humidifier 6.

In order to improve the controllability of the general-purpose package itself during the above-mentioned periods and to reduce operating costs, it is preferable to control the package and each unit with a microcomputer.

<<Effects>> As described above, according to the air conditioning system according to the present invention, since the humidifier and dust collector are separately provided in connection with the general-purpose air-cooled heat pump package, it can satisfy even extremely severe environmental conditions. This makes it possible to ensure a desired sanitary environment. In addition, an outside air cooling unit and a total heat exchange unit are connected in series to this package, so that during cooling or heating, the outside air taken into the total heat exchange unit is replaced by approximately the same amount of return air from the room. There is no need to pre-cool or pre-heat the outside air, as the outside air is mixed with a large amount of return air from the room in the outside air cooling unit and then sent to the general-purpose air-cooled heat pump package. Compared to the case where the return air is sent directly to the heat pump package, the heat efficiency is extremely high, and since the return air from the room is heat-exchanged and mixed with the outside air without waste, it can be an extremely economical air conditioning system.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a device assembled using the air conditioning system of the present invention, Fig. 2 is a basic flow diagram of the air conditioning system of the present invention, Fig. 3 is a flow diagram during cooling/heating operation, and Fig. 4 is a flow diagram during outside air cooling operation. 1... General-purpose air-cooled heat pump package, 2
... air conditioner, 5 ... dust collector, 6 ... humidifier,
7... Outside air cooling unit, 8... Total heat exchange unit, 10a to 10c, 12a, 12b... Damper.

Claims (1)

[Claims] 1. A general-purpose air-cooled heat pump package is connected to a separate humidifier and a dust collector, and an outside air cooling unit and a total heat exchange unit are connected to the package and connected in series,
During cooling and heating, the outside air taken into the total heat exchange unit is precooled and preheated by exchanging heat with an approximately equal amount of return air from the room, and then is exchanged with a large amount of return air from the room in the outside air cooling unit. An air conditioning system characterized in that the air is mixed, then sent to the general-purpose air-cooled heat pump package, cooled and heated to a predetermined temperature, and then supplied into a room.