JP3213422B2 - Air conditioner and control device for power consumption of a building provided with the air conditioner and the like - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which a plurality of outdoor units are connected in parallel to piping between units extending from an indoor unit.

[0002]

2. Description of the Related Art In general, a plurality of indoor units are arranged in parallel, and a plurality of outdoor units including a compressor and an outdoor heat exchanger are connected in parallel to piping between units connected to each indoor unit. A multi-type air conditioner for a building to be connected is known (for example, see Japanese Patent Application Laid-Open No. 2-85).
656).

[0003] This type of multi-type air conditioner includes a plurality of outdoor units.
There is an advantage that a large-capacity system of the device can be realized.

[0004]

By the way, in a building such as a building in which the air conditioner is installed, the use of OA equipment (computer), lighting equipment and the air conditioner during the peak hours of the daytime in summer, etc. In some cases, the power consumption of the entire building may exceed a predetermined (contract) value. In such a case, there has been a problem that a breaker or the like is operated to stop the power supply to the entire building, which hinders work (work) in the building.

An object of the present invention is to control the operating state of a plurality of outdoor units immediately before the power consumption of the whole building reaches a contract value, thereby suppressing the power consumption of the whole building. It is.

[0006]

In order to attain this object, the present invention relates to a multi-type refrigeration cycle constructed by connecting a plurality of outdoor units in parallel to an interunit piping extending from an indoor unit. In the air conditioner, a first controller that sets the actual horsepower by reducing the required horsepower of the air conditioning load of the building in accordance with the power consumption of the building in which the device is installed, and the first controller And a second controller for setting the number of operating outdoor units with the set actual horsepower.

Further, there are provided a lighting device, an OA device, a boiler, a multi-type air conditioner constituted by one refrigeration cycle by connecting a plurality of outdoor units in parallel to piping between units extending from the indoor unit, and the like. A control device for suppressing the power consumption of the air-conditioning apparatus according to the amount of power consumption of the air-conditioning apparatus. A first controller is provided for setting the actual horsepower by reducing the number of vehicles.

[0008]

The operation of each outdoor unit is controlled so that the power consumption of the building in which the air conditioner is installed does not exceed the contracted power.

[0009]

In FIG. 1, reference numerals 1, 2, and 3 denote outdoor units, and a plurality of these outdoor units are connected by an oil equalizing pipe 4. The oil equalizing pipe is connected to the compressors 5, 6, 7 in the outdoor units 1, 2, 3, respectively. Here, the compressors 5 and 6 housed in the outdoor units 1 and 2 are fixed capacity compressors, and the compressor 7 housed in the outdoor unit 3 is a variable capacity (inverter) compressor. Of course, each of the outdoor units 1, 2, and 3 includes an outdoor heat exchanger (not shown).
Is an outdoor unit of a constant capacity type, and the outdoor unit 3 is an outdoor unit of a variable capacity type.

The number of connected outdoor units 1, 2 and 3 and the number of operating units are set according to the number of indoor units described later and the air conditioning load of the building. 8, 9, and 10 are indoor units. For example, the indoor unit 8 is installed on the third floor 12 of the building 11, the indoor unit 9 is installed on the second floor 13 of the building, and the indoor unit 10 is installed on the third floor 14 of the building. Note that the outdoor units 1, 2, 3 are arranged on the roof of the building 11. The indoor and outdoor units are connected by an inter-unit piping 15 as shown in FIG.

FIG. 2 shows the indoor and outdoor units 1 and 2 shown in FIG.
It is explanatory drawing which shows the connection state of the wiring 50 of 2,3,8,9,10. 20 is a central control unit connected to these units, 21 is a measuring instrument for measuring the power consumption of the whole building, an air conditioner provided in this building (building),
The lighting device 60 is connected to an OA device 61 such as a copy machine, a boiler, and the like. The measuring device 21 compares the power consumption of the entire building with the contracted power of the building, and if the power consumption is likely to exceed the contracted power, there is little possibility that the work will be hindered first. Equipment such as lighting equipment 60 boiler and air conditioner
The power consumption of the A device 61 is preferentially suppressed over the power consumption.

Here, the case where the power consumption of the air conditioner is controlled will be described as follows. When the power consumption of the building is sufficiently lower than the contracted power and the contracted power does not exceed the contracted power even when the air conditioner in the building is operated at the full capacity, the microcomputer of the measuring instrument 21 outputs “0”. "0" signal is output, and when the air conditioner in the building is operated at 75% capacity, if the power consumption reaches the contracted power amount, "0" and "1" are output, and the same When the air conditioner is operated at the capacity of 50% and the power consumption reaches the contracted power, “1” and “0” are output. If the power consumption reaches the contracted power amount when the air conditioner is operated, “1” and “1” are output.

The central controller 20 includes a first controller 2
2 and a second controller 23. The first controller 22 calculates the required horsepower of the air-conditioning load of the entire building by inputting the operating conditions (the number of operating units) of the indoor units 8, 9, and 10 and the number of bits from the measuring device 21 (described above). ) Is calculated, and the actual driving horsepower is calculated.

The second controller 23 sets the number of operating units and the operating state of the outdoor units 1, 2, and 3 according to the actual operating horsepower. The output from the controller 23 controls each of the outdoor units 1 and 2. A few operating states are determined (see FIG. 4).
In the air conditioner having such a configuration, the outdoor units 1 and 2 have a constant horsepower of 10 hp, and the outdoor units 3 and
A description will be given of an operating state in the case of setting the variable capacity type of 10 horsepower with reference to FIGS.

First, when the operation is started in step 40 of FIG. 4, the required horsepower from each of the indoor units 8, 9, 10 is transmitted to the first control unit 20 of the central control unit 20 via a signal line 41 (see FIG. 2). Is input to the controller 22. Here, for example, a description will be given below assuming that the total required horsepower is set to 30 horsepower = A. Then, in step 42, it is determined whether or not there is an output (the number of bits of the microcomputer) from the measuring device 21. If there is no output (the number of bits is "0" or "0"), 30
Determine the horsepower itself as the actual horsepower setting (step 4
3). On the other hand, if there is an output from the measuring device 21, the process proceeds to step 44 where the output “1” “1”
The ratio K corresponding to “1” “0” or “0” “1” is obtained from FIG. Next, at step 45, the product of the ratio and the required horsepower described above is calculated, and the value is determined as the actual horsepower. By setting the product of the ratio K and the required horsepower A as the actual horsepower, the actual horsepower is lower than the required horsepower, and the outdoor units 1, 2, 3 are operated with the reduced actual horsepower. Here, the rate of decrease (7
(5%, 50%, 25%), that is, the suppression amount is set to a value that does not exceed the contracted electricity amount of the building, so that air conditioning that matches the contracted electricity amount of the building can be performed without any unnecessary decrease in horsepower. .

Next, at step 46, the operating state of each of the outdoor units 1, 2, 3 is set as shown in FIG. 5 according to the actual horsepower determined as described above. That is, the actual horsepower is 3
In the case of 0 hp (actual horsepower = requested horsepower), all the outdoor units 1, 2, and 3 are operated, and the capacity for 30 hp is allocated to each indoor unit. When the actual horsepower is 22.5 horsepower, the outdoor units 1 and 2 having two ratings are operated, and the outdoor unit 3 of variable capacity is operated at 2.5 horsepower. When the actual horsepower is 15 hp, only one of the two rated outdoor units is operated, and the variable capacity outdoor unit is operated at 5 hp.

FIG. 6 shows each of the outdoor units 1 and 2 when the required horsepower detected in step 41 of FIG. 4 is 25 horsepower.
2 and 3, where the actual horsepower is 25 hp, the two rated outdoor units 1 and 2 are operated, and the variable capacity outdoor unit 3 is operated at 5 hp. When the actual horsepower is 18.75 horsepower, only one outdoor unit 1 is operated, and the variable capacity outdoor unit 3 is operated at 8.75 horsepower. If the actual horsepower is 12.5 horsepower, 1
The outdoor unit 2 that was stopped at the time of 8.75 horsepower is operated, the operation of the outdoor unit 1 that is operated at the time of 18.75 horsepower is stopped, and the variable capacity outdoor unit 3 is operated at 2.5 horsepower. Let it.

As described above, in the rated outdoor units 1 and 2, the operating time of each of the outdoor units 1 and 2 is made uniform by rotating the number of operating units according to the actual horsepower.

[0019]

As described above, the present invention relates to a multi-type air conditioner constructed of one refrigeration cycle by connecting a plurality of outdoor units in parallel to piping between units extending from an indoor unit. A first controller that sets the actual horsepower by reducing the required horsepower of the air conditioning load of the building in accordance with the amount of power consumption of the building in which the
And the second controller that sets the number of operating outdoor units with the actual horsepower set by the controller, so that each outdoor unit efficiently and uniformly according to the power consumption of the building This outdoor unit, and thus the air conditioner, can be operated.

[Brief description of the drawings]

FIG. 1 is a piping connection diagram of an air conditioner of the present invention.

FIG. 2 is a wiring connection diagram of the device shown in FIG.

FIG. 3 is an explanatory diagram showing an output state from a measuring device 21 shown in FIG.

FIG. 4 is a flowchart of the central monitoring device shown in FIG. 1;

5 is an explanatory diagram showing an operation state of an outdoor unit of the device shown in FIG.

FIG. 6 is an explanatory diagram showing an operation state of the outdoor unit at a required horsepower different from that in FIG. 5;

[Explanation of symbols]

 1,2,3 outdoor unit 8,9,10 indoor unit 22 first controller 23 second controller

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-5545 (JP, A) JP-A-5-5548 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 11/02 F24F 11/02 102 F25B 13/00 F25B 13/00 104

Claims (2)

(57) [Claims] 1. A refrigeration system in which a plurality of outdoor units are connected in parallel to interunit piping extending from the indoor units.
A first controller for reducing the required horsepower of the air conditioning load of the building according to the power consumption of the building in which the device is installed and setting the actual horsepower, An air conditioner comprising: a second controller for setting the number of operating outdoor units with the actual horsepower set by the first controller. 2. A refrigeration cycle comprising a lighting device, an OA device, a boiler, and a plurality of outdoor units connected in parallel to piping between units extending from the indoor unit.
A type of air conditioner, which has a measuring device for determining the power consumption of the entire building in which the air conditioner is provided, and a control device for suppressing the power consumption to a predetermined value. An air conditioner comprising: a first controller that sets the actual horsepower by reducing the number of operating outdoor units of the air conditioner in accordance with the condition.