JPS63273067A - Watt-hour meter for air conditioner - Google Patents

Abstract

PURPOSE:To reduce a cost by detecting the input current of an air conditioner by a through type current transformer mounted to a power line and integrating a detected current value by time to determine the power consumption of the air conditioner. CONSTITUTION:A signal outputted from a through type current transformer 3 mounted to the power line 1 of the outdoor unit 2 of each air conditioner is inputted to a power integrating circuit 4 and, after converted 4a to a voltage value in the circuit 4, A/D-converted 4b and inputted to an arithmetic unit 4c. Electric energy outputted from the arithmetic unit 4c is transmitted to a centralized control unit 5 via an interface unit 4e. The output of a pulse output watt-hour meter 6 is inputted to the unit 5 and the power consumption of all the air conditioners is recorded in the unit 5. Thus, a cost can be reduced by constituting a power integrating instrument by the through type current transformer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power integration device that can be attached to any type of unit without requiring any special lead-out terminal when attached to an air conditioner.

(Conventional technology) Generally speaking, in order to convert the power consumption of an air conditioner, a method is used in which all the inputs of the air conditioner are integrated and managed using a power meter. The system requires wiring to the meter, takes up a large amount of space, and is expensive.In addition, the system simply integrates only the operating hours and calculates the total amount of electricity used in the operating hours. There was a power converter as shown in Figure 3, which was developed by improving these methods.In the figure, (1) is the power line, (2) is the outdoor unit, and (g) is the operation signal output terminal. , (4) is a power converter, (4f) is an integrator that totals the operating time of the air conditioner from the operating signal output from the outdoor unit, and (4g) is the standard input of the target unit (, TIS
(4a) is an arithmetic unit that calculates electric power from cumulative operating time information and standard human power (CPU input (4d) is memory, '(4e) is the obtained electric power (5) is a central control unit that receives power consumption information obtained from terminals and performs centralized management; (6) is a pulse output end preliminary run that detects the power consumption of all J11 machines. With the electricity meter,
The pulse output is connected to the central control unit (5).The operation will be explained next.The operation time integrator receives the operation signal from the outdoor unit, integrates the operation time,
C). The input setting circuit (4g) is pre-installed with J-S.
The standard input of the unit according to the standard is set and output to the arithmetic unit. A conventional power integrator obtains a calculated value indicating power consumption by combining the above-mentioned integrated value of operating time and the standard input value. The power consumption of each unit thus obtained is transmitted to the central management unit. In the central control unit, the output of the electricity meter with pulse output is transmitted from each unit, and the total power charges are calculated for each tenant and store Klt that uses each unit by allocating it to a calculated value indicating the power consumption. [Problem to be solved by the invention] Since the conventional power integration device is configured as described above, a lead-out terminal of operation gI is required to install the air conditioner, and a dedicated contact is required. When installing to an air conditioner that does not have a terminal for extracting or operating signals, the judgment is made based on the voltage applied to the compressor, so an interface to take in AC200V 1 [pressure] to the electronic equipment is required, making it time-consuming to apply the system. This was the case.

Furthermore, when there is an air conditioner or building ancillary equipment other than the air conditioner for which the standard input value is unknown, a great deal of time is required to investigate the input value.

This invention was made to solve the above problems, and provides a power integration device that can be attached to any unit without requiring any special processing or terminals when attached to an air conditioner. The purpose is to obtain.

[Means for solving problems]

The power integration device according to the present invention detects the input current of the air conditioner using a through-type current transformer cT attached to the power line, and calculates the power consumption of the 9111 aircraft by integrating the current value over time. .

[Effect]

The power integration device in the invention by CT CT
The current value of the air conditioner is obtained by passing through the IC, and the power consumption is obtained by checking the operation and detecting the current. , (1) is the power line, (2) the outdoor unit of the company's air conditioner, and (3) is the CT installed with power #lK,
(4) is a power integration circuit, (5) is a power central management unit, and (6) is a power meter with pulse output that is attached to the main power supply of the air conditioner and monitors the power consumption of all air conditioners. The signal output from the CT (3) attached to the power line (1) is input to the power integration circuit, internally converted to a voltage value (4a), then A/D converted (4b) and sent to the CPU (4a).
has been entered. The amount of electric power output from the CPU (4c) is
(4e)≦transmitted to the central management unit (5).

Further, the output of the pulse output power meter (6) is input to a central control unit, and the power consumption of all air conditioners is recorded in the central control unit.

Next, the operation will be explained. Figure 2 shows CPU (4c)
3 is a flowchart showing the processing of FIG. In the operations of (6) to (8), the current value is integrated by reading the current value t every t minutes and adding it to the fixed value W, and in (9) after 7 hours have elapsed or the central control unit When a power transmission request occurs, the integrated current value is converted into the corresponding power amount by the operations (6) to (8), and transmitted to the central control unit, and the power W is reset. Through this operation, each unit manually inputs to the central management unit a calculated value corresponding to the integrated power according to the operating state of the air conditioner at the time of the transmission request or every T time.

The total power consumption obtained from the output of the υ pulse output wattmeter is distributed according to the calculated values of each unit, and each tenant and store is automatically billed for the power charges.

In the above embodiment, the power integration of the outdoor unit of the air conditioner has been described, but it is also effective for power integration of the heater energization of the indoor unit.

In addition, 1. A similar system can be applied to the amount of electricity when the amount of electricity shared by equipment attached to buildings and stores is divided into liquids.

In addition, in this embodiment, an example was shown in which power is converted by integrating the current value, but the correlation between the current value and other management values is stored in the power integration circuit (4) K, and the power measurement It is also possible to understand the characteristics of the target device and use it for other information.

〔Effect of the invention〕

As described above, the power integration device according to the present invention is constructed of a CT and is inexpensive, and also integrates power by detecting current, so it can be installed in an air conditioner simply by passing the power line through the CTK, and an operation signal can be sent to the installation. There is no terminal to take out, and there is an effect that a power integration device that can be easily attached to any model and ancillary equipment can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a power integration device according to an embodiment of the present invention, FIG. 2 is a flowchart according to an embodiment of the invention, and FIG. 3 is a block diagram of a conventional power integration device. (2) is the outdoor unit of the air conditioner, (3) is the current transformer, (4) is the power integration device, and (5) is the central control unit)
, (6) is a power meter with pulse output.

Claims (2)

[Claims] (1) Electricity rate that connects multiple air conditioners, calculates the power consumption of all units, monitors the operating status of each unit, and divides the power fee according to the power consumption of each unit. A power integration device in a management system, characterized in that the operating status of each unit is monitored using a current signal obtained from a feedthrough current transformer (hereinafter abbreviated as CT) attached to an input line of each unit. (2) A power integration device that performs distribution processing based on a calculated value obtained by monitoring the current signal using a power meter with a transmitting device in a main line connecting a plurality of air conditioners.