JPH04297748A - Air conditioning system - Google Patents

Abstract

PURPOSE:To take in the outside air in response to the capability of an indoor unit by a method wherein a damper unit which has a ventilating quantity in response to the capability is provided in a passage between an outside air processing exclusive unit and each indoor unit, and an outdoor air suction quantity is detected, and the air volume is controlled to become a required air volume by the outdoor air suction quantity and the operational condition of each indoor unit. CONSTITUTION:Indoor units 2A-2C with an outdoor air inlet 2c for respective rooms 16A-16C, and an outside air processing exclusive unit 3 with a outdoor air outlet 8 are interlocked, and damper units 12A-12C are provided at a connecting part 14a between the outdoor air inlet 2c and a duct 14. Also, an air volume detector 18 for the outside air processing exclusive unit 3 is provided in the outdoor air outlet 8. The damper units 12A-12C allot the outdoor air in the order to 12A 12B 12C by stoppers at the time of opening, and a control unit calculates a necessary air volume by the operational condition of the indoor units 2A-2C and a signal of an air volume detector 18, and controls the air volume. Therefore, the outside air volume which is suitable for the capability of the indoor units 2A-2C can be fed to respective rooms 16A-16C, and excess/shortage of the outside air volume can be prevented from happening.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system used for air conditioning such as heating and cooling of buildings.

[0002] A conventional direct expansion air conditioning system connects one outdoor unit, multiple indoor units, and an outdoor air processing unit with a built-in total heat exchanger to enable heat recovery through refrigerant piping. Air conditioning, ventilation, humidification, dust removal, and heat recovery were performed, but the dedicated outdoor air processing unit has an air volume commensurate with the floor area that can be air-conditioned by the outdoor unit, so it can be used in each room regardless of the capacity of the indoor unit. The air volume was being supplied evenly to the aircraft. Furthermore, the system supplies a constant amount of air into the room regardless of the number of indoor units in operation. For this reason, when a room is divided into unequal partitions and indoor units with different capacities are installed corresponding to each partition, an excess or deficiency in the amount of outside air occurs in each partitioned room. In addition, unoccupied rooms with indoor units turned off are also ventilated, and humidification is performed along with the ventilation during heating, which is contrary to the idea of energy conservation.

FIG. 3 shows a cross section of a conventional direct expansion multi-air conditioner, in which 1 is an outdoor unit that is composed of a compressor, a heat exchanger on the non-use side, etc., and is installed on the roof of a building, etc., and 2 is an outdoor unit on the user side. This indoor unit is comprised of a heat exchanger, a blower, a throttle device, a high-performance filter 2b, etc., and is installed indoors in the ceiling. Reference numeral 3 denotes a dedicated outside air processing machine, which, as shown in FIG.
An intake path A consisting of a user-side heat exchanger 26, a humidifier 7, and an outdoor air outlet 8, an indoor air inlet 9, a second filter 10, an indoor air exhaust blower 6b, and an indoor air outlet 1.
1, and a total heat exchanger 5 that is provided between the intake path A and the exhaust path B, and performs heat exchange of the air passing through each.
It is composed of.

[0004] The indoor unit 2 and the outside air processing dedicated unit 3 are connected to the outdoor unit 1 via a refrigerant pipe 22. 14, 14a
24 is a building, and 25 is a ceiling thereof.

Next, the operation of the above-mentioned conventional device will be explained. During cooling, the outdoor air processing machine 3 is operated in conjunction with the outdoor unit 1 and the plurality of indoor units 2 to perform indoor cooling, dust removal, and ventilation. During heating, the refrigerant circuit is switched to a heating cycle using a four-way valve or the like, and the indoor unit is heated with the indoor unit 2 on the condensing side and the outdoor unit 1 on the evaporating side. During this cooling or heating, regardless of the number of operating indoor units 2 or their capacity, the outdoor air processing dedicated unit 3 continues to operate at its rated capacity and supplies an equal amount of air volume to each indoor unit 2, so that all the indoor units 2 Run at full speed until it stops. In addition, during cooling or heating, outdoor air and indoor air are heat exchanged by the total heat exchanger 5, and air at a temperature lower than the outside temperature is introduced into the indoor unit 2 during heating, and air at a temperature higher than the outside temperature is introduced into the indoor unit 2 during heating. Ru.

[0006]

[Problems to be Solved by the Invention] The conventional direct expansion multi-air conditioning system is configured as described above, in which a dedicated outdoor air processing unit 3 is connected to each indoor unit 2 in a through room or to each indoor unit 2 of the same capacity. There were no problems when supplying outside air. However, when a room is partitioned into uneven sections and indoor units 2 with different capacities are installed in each partitioned room, an excess or deficiency in the amount of outside air occurs in each partitioned room. Furthermore, ventilation and humidification are performed even in unoccupied rooms that do not require air conditioning, resulting in energy loss.

[0007] This invention was made in order to solve the above-mentioned problem, and it is possible to supply each partitioned room with outside air commensurate with the capacity of the indoor unit, that is, commensurate with the number of people in the room. The purpose of the present invention is to obtain an air conditioning system that can be operated in an energy-saving manner and that can ventilate and humidify only the rooms that require air conditioning.

[0008]

[Means for Solving the Problems] The air conditioning system according to the present invention connects the outdoor air outlet of a dedicated outdoor air processing machine and the outdoor air intake ports of a plurality of indoor units according to the functional power of each indoor unit when opened. It has a large amount of ventilation and is connected to a duct via a damper unit that opens and closes in conjunction with each indoor unit.

[0009] Furthermore, the air conditioning system according to the present invention includes:
In addition to the above means, there is also an air volume detection means for detecting the amount of outdoor air taken in by the outside air processing dedicated machine, and an air volume detection means that detects the outdoor air intake amount of the outside air processing dedicated machine, and receives a detection signal of the output of the air volume detection means and the operating status of each indoor unit. A control means is provided to control the amount of air so that the amount of air is the required amount.

0010

[Function] In this invention, a damper unit is provided in the ventilation path between the outside air processing unit and each indoor unit, and the damper unit has an airflow amount that corresponds to the capacity of each indoor unit. is obtained.

Further, in the present invention, the outdoor air suction amount of the outdoor air processing dedicated machine is detected, and the outdoor air suction amount is controlled so as to become the required air volume that changes depending on the operating state of each indoor unit.

0012

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of an air conditioning system according to a first embodiment of the present invention, in which 1 is an outdoor unit, 2A to 2C are indoor units having a high-performance filter 2b and an outdoor air intake port 2c, and have a capacity (cooling/heating capacity). ) is indoor unit 2A > indoor unit 2B >
The order is indoor unit 2C. Reference numeral 3 designates a dedicated outside air processing machine similar to the conventional one shown in FIG. 3, and is interlocked with the indoor units 2A to 2C. 12A to 12C are ducts between the outdoor air intake ports 2c of the indoor units 2A to 2C in the ducts 14 that communicate between the outdoor air outlet 8 of the outdoor air processing dedicated machine 3 and each room (air conditioned room) 16A to 16C. This is a damper unit provided in the connecting part 14a, and as shown in FIG. 2, it includes a rotating shaft 12a, a damper 12b, a spring 12c, a stopper 12d when the damper 12b is closed, a magnet 12e, and a duct connection flange 12f.
, stoppers 12g, 12h, 12 when the damper 12b is opened.
It is composed of j.

13 is a partition wall, 15 is each room 16A~
16C is an indoor air exhaust port provided in the ceiling 25; 17 is a switch for the indoor units 2A to 2C; damper unit 1;
2A to 12C also open and close in conjunction with the indoor units 2A to 2C. 22 is the outdoor unit 1, the indoor units 2A to 2C, and the outdoor air processing unit 3
A refrigerant pipe 24 communicates with the building.

Next, the operation will be explained. When the indoor unit switch 17 is turned on to enter, for example, a cooling mode, the outdoor unit 1, the indoor units 2A to 2C, the outside air processing dedicated machine 3, and the damper units 12A to 12C start operating in conjunction with each other. Outdoor air is sucked in by the blower 6a of the outdoor air processing dedicated machine 3, dust is removed by the high-performance filter 23, heat is recovered by heat exchange with the exhaust air in the total heat exchanger 5, and the heat is recovered by the heat exchanger 26.
The air is further cooled at , and blown out from the outdoor air outlet 8 into the duct 14 . Then, it passes through the duct connection part 14a and the damper units 12A to 12C, enters the indoor units 2A to 2C from the outdoor air intake port 2c, and enters the indoor units 2A to 2C to each room 16A to 1.
Air is blown out to 6C for cooling and ventilation.

Here, the damper unit 12A connected to the indoor unit 2A has a stopper 12j when the damper is opened, and the damper unit 12B connected to the indoor unit 2B has a stopper 12h when the damper is opened. The damper unit 12C connected to the damper unit 2C has a stopper 12g when the damper is opened, and the outdoor air taken in from the outside air processing machine 3 is distributed in the order of damper unit 16A>damper unit 16B>damper unit 16C. In addition, the dirty air in the room passes through the back of the ceiling 25 from the indoor air exhaust port 15 and is sent to the indoor air suction port 9 by the blower 6b of the outdoor air processing unit 3.
The air is sucked into the air, passes through the filter 10 and the total heat exchanger 5, and is discharged to the outside of the building 24 from the indoor air outlet 11. Also, the heating mode is the same as the cooling mode, only that the humidification of the outdoor air by the humidifier 7 in the outdoor air processing dedicated machine 3 is added.

In the above embodiment, each of the indoor units 2A to 2
Since the amount of ventilation can be obtained according to the capacity of C, there is no problem of excess or deficiency in the amount of outside air in each partitioned room.

FIG. 5 shows the configuration of an air conditioning system according to a second embodiment of the present invention, and reference numeral 19 is a control unit provided in the outside air processing machine 3 shown in FIG. Reference numeral 18 denotes an air volume detector that is installed in the outdoor air outlet 8 of the outdoor air processing machine 3 and detects the air volume.Other configurations are the same as in the first embodiment.

Next, the operation will be explained. The following operation is added to the operation of the first embodiment. That is, when the indoor unit 2B in the room 16B is turned off with the switch 17, the magnet 12e of the damper unit 12B is de-energized.
At the same time that the damper 12b closes due to the elastic force of the spring 12c (this operation is the same in the first embodiment), the controller 19 closes.

[Equation 1] In other words, the operating indoor units 2 with respect to the capacities of all the indoor units 2A to 2C connected to the outdoor air processing dedicated unit 3
The rotational speed of the blowers 6a and 6b is controlled so as to reduce the rated air volume to a proportion of the total capacity of the blowers A and 2C. In this case, the controller 19 detects the operating status of each of the indoor units 2A to 2C, receives the output from the airflow detector 18, calculates the required airflow using the above equation 1, and controls the detected airflow so that it becomes the required airflow. do.

In the second embodiment described above, as in the first embodiment, the problem of excess or deficiency in the amount of outside air in each partitioned room is solved by providing a damper unit, and the equipment 3 required for outside air processing Energy-saving operation is possible because only the amount of air flows through.

[0020]Although each of the above embodiments has been described with respect to a direct expansion air conditioning system, similar effects can be achieved even with a water type air conditioning system.

[0021]

[Effects of the Invention] As described above, according to the present invention, a damper unit having an air flow rate according to the capacity of each indoor unit is provided in the ventilation path between the outdoor air processing dedicated unit and each indoor unit, so that no problem occurs. It is possible to supply each room with an amount of outside air commensurate with the indoor functional capacity installed in the equally partitioned rooms, and it is possible to prevent excesses and deficiencies in the amount of outside air.

[0022] Furthermore, since the outdoor air intake amount of the outdoor air processing unit is controlled to the required air volume that changes depending on the operating status of each indoor unit, energy-saving operation can be achieved by eliminating unnecessary air volume. .

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an air conditioning system according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a damper unit according to the invention.

FIG. 3 is a configuration diagram of a conventional air conditioning system.

FIG. 4 is a front view of the outside air processing machine.

FIG. 5 is a configuration diagram of an air conditioning system according to a second embodiment of the invention.

[Explanation of symbols]

1 Outdoor unit 2A~2C Indoor unit 2c Outdoor air intake 3. External air processing machine 5 Total heat exchanger 6a, 6b blower 7. Humidifier 8 Outdoor air outlet 12A-12C Damper unit 14 Duct 14a Duct connection part 18 Air flow detector 19 Controller 22 Refrigerant piping

Claims (2)

[Claims] Claim 1: An outdoor unit having a compressor and a heat exchanger on the non-use side and a plurality of indoor units having heat exchangers on the use side are connected by refrigerant piping to form a refrigeration cycle, and the indoor air conditioning In an air conditioning system that performs An air conditioning system characterized in that a duct is connected to an outdoor air intake port of the air conditioner through each damper unit, which has a ventilation volume according to the functional capacity of each indoor unit when opened, and which opens and closes in conjunction with each indoor unit. . 2. An air volume detection means for detecting the outdoor air intake amount of the outdoor air processing dedicated machine; and an air volume detection means for detecting the outdoor air intake amount of the outdoor air processing dedicated machine; The air conditioning system according to claim 1, further comprising a control means for controlling the air volume to a required air volume.