JPH04281142A - Air conditioner - Google Patents

Abstract

PURPOSE:To ventilate only a room which needs air conditioning and to control the amount of ventilation proper to each room in an air conditioning device where one outdoor equipment is connected with a plurality of indoor equipment and equipment specially designed for open air processing. CONSTITUTION:This device controls the amount of open air, which is introduced indoors, according to the concentration of CO2 of each of rooms 21, 22, and 23 by means of an air capacity controller 26 and controls the amount of open air to take according to the capacity regulated by an air capacity controller 28.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention is applied to air conditioning for cooling and heating buildings, etc., and is particularly applicable to air conditioning in which the amount of outdoor air supplied to each room is adjusted according to the CO2 concentration in each room. It is related to the device.

0002

[Prior Art] In general, conventional direct expansion air conditioners incorporate multiple indoor units and a total heat exchanger into a single outdoor unit to process outside air and enable heat recovery from air discharged outdoors. It is connected to a dedicated machine via refrigerant piping and is configured to perform heating and cooling, ventilation, humidification, dust removal, and heat recovery, but the dedicated outdoor air processing machine is set to an air volume commensurate with the floor area that can be air-conditioned by the outdoor unit. Regardless of the capacity of the indoor unit or the number of units in operation,
For example, a fixed amount of outdoor air was supplied, determined by the expected number of people in the air-conditioned room.

FIG. 2 is a sectional view showing the structure of a conventional direct expansion multi-air conditioner of this type. In the figure, 1 consists of a compressor, a heat exchanger on the non-use side, etc., and is an outdoor unit installed on the roof of a building, etc., and 2 consists of a heat exchanger on the use side, a blower, a throttle device, etc. The indoor unit 3 installed in the outdoor air processing unit 3 is a dedicated outdoor air processing machine, and as shown in FIG. and an intake path A consisting of an outdoor air outlet 9, an exhaust path B consisting of an indoor air inlet 10, a second filter 11, an indoor air exhaust blower 12, and an indoor air outlet 13, an intake path A and an exhaust path Total heat exchanger 1 installed between B and exchanging heat of air passing through each
It consists of 4. 15 and 16 are external air processing machines 3
These are ducts and connecting parts that communicate between the indoor units 2 and each indoor unit 2.

Next, the operation of the conventional device configured as described above will be explained. First, during cooling, the outdoor air processing dedicated machine 3 is operated in conjunction with the outdoor unit 1 and the indoor unit 2 to perform indoor cooling, dust removal, and ventilation. On the other hand, 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.

[0005] During cooling or heating, regardless of the number of indoor units 2 in operation, the outside air processing dedicated unit 3 continues to operate at its rated capacity and operates at full capacity until all indoor units 2 are stopped. Also, during cooling or heating, outdoor air and indoor air are heat exchanged by the total heat exchanger 14, and during cooling, air that is lower temperature than the outside temperature is introduced into the indoor unit 2, and during heating, air that is higher than the outside temperature is introduced into the indoor unit 2.

[0006]

[Problems to be Solved by the Invention] Since the conventional air conditioner is configured as described above, it is possible to use a plurality of indoor units 2 installed in one continuous room or indoor units 2 of the same capacity installed in each room. When outside air was supplied to aircraft 2 from outside air processing machine 3, there was no shortage of outside air due to dilution of CO2 concentration, but when there were few people present, there was a waste of time, such as supplying unnecessary outside air. In addition, if the size of each room and the capacity of the installed indoor unit 2 are different, the amount of outside air supplied cannot be adapted to the size of each room, resulting in excess or deficiency of outside air, and furthermore, unattended There were problems such as ventilation and humidification even in rooms that did not require air conditioning, resulting in energy loss.

[0007] This invention was made to solve the above-mentioned problems, and it is possible to ventilate and humidify only the rooms that require air conditioning, and to adjust the ventilation amount to suit each room. The purpose of the present invention is to provide an air conditioner that can be operated in an energy-saving manner.

[0008]

[Means for Solving the Problems] The air conditioner according to the present invention detects the amount of outdoor air sent from the outside air processing unit to each indoor unit using a CO2 concentration detector installed in each room. an air volume controller that adjusts the CO2 concentration in each room according to the CO2 concentration, and an air volume controller that controls the amount of outdoor air taken into the outdoor air processing machine according to the amount of outdoor air adjusted by the air volume controller. It is equipped with the following.

[0009]

[Operation] Each air volume controller of the air conditioner according to the present invention adjusts the amount of outdoor air supplied to each room to an appropriate amount according to the CO2 concentration in each room, and the air volume controller adjusts each air volume. The outdoor air processing machine is controlled so that the appropriate amount of outdoor air regulated by the outdoor air intake unit is sucked in from outside.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the configuration of an air conditioner according to an embodiment of the present invention. In the figures, Figures 2 and 3
Since the same reference numerals are the same as those in the conventional device, the explanation will be omitted. 17, 18, and 19 are installed on the upper surface of the ceiling material 20, and are connected to the outside air processing machine 3 by connecting the connecting parts 16 and the duct 15.
The heating and cooling capacity of the indoor unit connected via is 17>18
>19. 21, 22, 23 are formed by the ceiling material 20 and the partition wall 24, and each indoor unit 1
These are rooms corresponding to numbers 7, 18, and 19.

25 is the ceiling material 20 of each room 21, 22, 23.
Indoor air exhaust ports 21a, 22a, respectively formed in
A CO2 concentration detector 23a is installed in each connecting portion 16 of each indoor unit 17, 18, 19, and a CO2 concentration detector 26 is installed in each connecting portion 16 of each indoor unit 17, 18, 19 to measure the amount of outdoor air that passes through the outdoor air processing unit 3 through the duct 14. 27 is a switch for operating each of the indoor units 17, 18, and 19; 28 is a switch for controlling the outdoor air intake port 4 by changing the rotational speed of the outdoor air intake blower 6 of the outdoor air processing dedicated machine 3; This is an air volume controller that controls the amount of outdoor air taken in from the air.

Next, the operation of the air conditioner according to an embodiment of the present invention constructed as described above will be explained. First, turn on each switch 27 of each chamber 21, 22, 23.
For example, when the air conditioner mode is set to the cooling mode, the outdoor unit 1, each of the indoor units 17, 18, 19, the outside air processing dedicated unit 3, and each of the air volume regulators 26 start operating in conjunction with each other. As shown in FIG. 3, the outdoor air is sucked in from the outdoor air intake port 4 by the outdoor air intake blower 6 of the outdoor air processing machine 3, removed from the indoor air by the first filter, and removed from the indoor exhaust air by the total heat exchanger 14. The heat is recovered and cooled by the heat exchanger 7 on the user side, and is blown out from the outdoor air outlet 9 into the duct 15 communicating with each indoor unit 17, 18, 19. 26 to each indoor unit 17, 18,
19 and is blown into each chamber 21, 22, 23 to perform cooling.

On the other hand, the indoor air in each room 21, 22, 23 is discharged from each indoor air outlet 21a, 22a, 23a, passes through the ceiling, and is discharged by the indoor air exhaust blower 12 of the outdoor air processing unit 3. Indoor air is taken in from the indoor air intake port 10, passes through the second filter 11 and the total heat exchanger 14, and is discharged outdoors from the indoor air outlet to perform ventilation.

[0014] For example, when the number of people in the room 22 decreases, the CO2 concentration in the room 22 decreases, and the switch 2
When the CO2 concentration becomes lower than the preset value in step 7,
The CO2 concentration detector 25 provided in the indoor air outlet 22a detects this, and the air volume regulator 26 adjusts the amount of outdoor air introduced into the indoor unit 18 from the connecting part 16 via the duct 15 to CO2. CO2 detected by concentration detector 25
Refine until the density value recovers to the set value. Then, since the reduced air volume does not require the amount of air outside the room, the air volume controller 28 controls the rotational speed of the outside air intake blower 6 of the outside air processing machine 3, and the air is sucked in from the outside air intake port 4. Reduce the amount of outdoor air.

Further, when the air conditioning of the room 22 is stopped by the switch 27, the indoor unit 18 and the air volume controller 26 are also stopped, and the flow of outdoor air supplied from the duct 15 is also completely blocked. Then, the air volume controller 28 controls the rotational speed of the outside air suction blower 6 to a further lower value, thereby further reducing the amount of outdoor air taken in through the outdoor air intake port 4. Also,
When it is necessary to prevent the pressure inside the room 22 from becoming negative when the air conditioning is stopped, a damper (not shown) that opens and closes in conjunction with the indoor unit 18 is installed at the indoor air outlet 22.
It should be installed at a. In addition, CO in the above example
2 The concentration detector 25 is connected to each indoor air outlet 21a, 22
Although the explanation has been made regarding the installation in the chambers 21, 23a, the present invention is not limited thereto, and it goes without saying that the same effect can be achieved as long as it is in the atmosphere inside each of the chambers 21, 22, and 23. Furthermore, although the above embodiment has been described with respect to a direct expansion air conditioner, the same effect can be achieved in the case of, for example, a water type air conditioner.

[0016]

As described above, according to the present invention, the amount of outdoor air sent from the outside air processing unit to each indoor unit is detected by the CO2 concentration detector installed in each room. Equipped with an air volume controller that adjusts each according to the CO2 concentration, and an air volume controller that controls the amount of outdoor air taken into the outdoor air processing machine according to the amount of outdoor air adjusted by the air volume controller. Therefore, it is possible to ventilate and humidify only the rooms that require air conditioning, and to adjust the ventilation to suit each room, thereby providing an air conditioner that can operate in an energy-saving manner.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of a conventional air conditioner.

FIG. 3 is a front view showing a dedicated outside air processing machine that constitutes a main part of the air conditioner in FIG. 2;

[Explanation of symbols]

1 Outdoor unit 2 Indoor unit 3. External air processing machine 25 CO2 concentration detector 26 Air volume regulator 28 Air volume controller

Claims (1)

[Claims] 1. An outdoor unit configured with a compressor, a condenser, etc.; an indoor unit configured with an evaporator, a throttling device, etc., connected by refrigerant piping to the outdoor units installed in a plurality of rooms; This outdoor air processing machine sucks outdoor air, dust-proofs it, humidifies it, sends it to the indoor unit, exchanges heat with the indoor air, and then discharges it outside. an air volume regulator that adjusts the amount of outdoor air sent from the dedicated machine to each of the indoor units in accordance with the CO2 concentration in each of the indoor units detected by a CO2 concentration detector located in each of the indoor units;
An air conditioner comprising an air volume controller that controls the amount of outdoor air taken into the outside air processing machine according to the amount of outdoor air regulated by the air volume controller.