JPS62196546A - Control equipment for building air conditioning equipment - Google Patents

Abstract

PURPOSE:To permit to transmit an information between an air-conditioning facility and a control device without employing any exclusive line by a method wherein a monitor signal, transmitted from the air-conditioning facility to the control device, and an operation signal, transmitted from the control device to the air-conditioning facility, are modulated and demodulated, thereafter, are carried through electric wirings for lighting or power transmitting, which are arranged in a building. CONSTITUTION:The opening and closing signals of an opening and closing valve 20, the operation signal of a pharmaceutical pouring pump 22 and the detecting signal of a sensor 24 are inputted into an adaptor 26 through signal cables 20a, 22a, 24a. Then, the signals are outputted to a modulator and demodulator 28 to modulate them, thereafter, are transmitted to the main body of a control device through lighting wires 30. The main body of the control device, installed in the ground floor of a building, is connected to the lighting wires 30 through the modulator and demodulator 34 and a signal, transmitted through the lighting wires 30, is demodulated by the modulator and demodulator 34 and is inputted into the main body 32 of the control device. The main body 32 of the control device monitors water temperature, electric conductivity or the like and controls the quality and quantity of water by opening the opening and closing valve 20 or operating the pharmaceutical pouring pump 22 if necessary.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control device for air conditioning equipment such as refrigerators or cooling towers in buildings, that is, high-rise buildings. The present invention relates to a control device that can control or monitor air conditioning equipment without installing a dedicated control information transmission line.

[Conventional technology] Buildings are equipped with air conditioning equipment, one of which is a cooling tower.In order to save on water consumption, water is recycled in this cooling tower. Water quality is controlled by adding various water treatment chemicals. Such water treatment maintains a constant water quality and allows refrigerators and the like to operate smoothly.

By the way, cooling towers are often installed in buildings, while refrigerators and the like are often installed in basements, and these control devices are usually installed in separate locations. Conventionally, these cooling towers, refrigerators, and control devices are generally connected by a dedicated line for information transmission, and these are monitored and controlled.

[Problems to be Solved by the Invention] -1- As mentioned above, in conventional building air conditioning equipment, the air conditioning equipment and the control device are connected by a dedicated line. Dedicated line wiring must be installed, which increases construction costs accordingly. Also,
When increasing the capacity of air conditioning equipment in an existing building, a new dedicated line must be installed, which requires extremely complicated or difficult work.

For this reason, it is expected to provide a control device that allows information to be transmitted between the air conditioning equipment and the control device without using a dedicated line.

[Means for Solving the Problems] The control device for air conditioning equipment in a building according to the present invention modulates and demodulates the monitoring signal transmitted from the air conditioning equipment to the control device and the operation signal transmitted from the control device to the air conditioning equipment. It is characterized in that it is modulated and demodulated by a device and transported through electric wiring for electric lights or power that is installed in each building.

In addition, there are cases where only the electrical wiring for power was previously installed near the air conditioning equipment, and there was no electrical wiring for the lights. can be communicatively coupled.

[Function] In the present invention, the air conditioning equipment can be monitored and controlled without installing a dedicated line for controlling the air conditioning equipment.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram showing a control device for a cooling tower in a building's air conditioning equipment, according to an embodiment of the present invention. code 1
0 is a cooling tower, to which piping 12, 14 for circulating cooling water, piping 16 for supplying make-up water, piping 18 for supplying water treatment chemicals, etc. are connected. In addition, piping 1 for supplying makeup water
An on-off valve 20 is provided in the middle of the pipe 6, and a drug injection pump 22 is provided in the middle of the drug injection pipe 18.

Furthermore, a sensor 24 is installed inside the cooling tower 10 to detect the quality of cooling water.

Therefore, the opening/closing signal of the opening/closing valve 20, the operation signal of the drug injection pump 22, and the detection signal of the sensor 24 are transmitted through the signal cable 20a.
, 22a, 24a to the coupling device 26.

The signal is then output to the modem 28, modulated, and then sent to the main body of the control device via the power line 30. That is, the control device main body 32 installed in the basement of a building is connected to the power line 30 via a modem 34, and the signal transmitted through the power line 30 is demodulated by the modem 34. It is input to the control device main body 32.

The control device main body 32 monitors the water temperature, electrical conductivity, etc., and if necessary opens the on-off valve 20 or operates the chemical injection pump 22 to adjust the water quality and amount. That is, the control device main body 32 compares the input signal with a preset standard water amount and standard water quality, and outputs the above-mentioned operation signal as necessary. The operation signal from the control device main body 32 is modulated by the modem 34 and then sent to the modem 28 via the power line 30. The modulator/demodulator 28 demodulates this operating signal and transmits the operating signal to the on-off valve 20 and the chemical dosing pump 22 through the coupling device 26.

In addition, block A in the figure shows the building installation part, and block B shows the basement installation part.

As described above, according to the device of this embodiment, the cooling tower 10 installed in the building 1- can be monitored and monitored by the control device main body 32 installed in the basement via the power line 30 without using dedicated wiring. can be controlled.

Of course, the present invention can be generally applied to systems in which air conditioning equipment such as cooling towers are installed in locations remote from the main body of the control device, and cooling towers can be installed not only on the rooftops of buildings but also in other locations such as buildings. It may be installed on the side of the

FIG. 2 is a system diagram showing the configuration of a cooling tower control device according to a different embodiment of the present invention.

In this embodiment, the modem 28 is connected to the power line 31, and the control device main body 32 is connected to the power line 30. That is, when the capacity of the cooling tower 1o is large,
This cooling tower is connected to a voltage higher than the lamp voltage (e.g. 200V).
), perform the power wiring from where power is supplied. In this case, there may be no electric light wiring near the cooling tower. In this case, as shown in block C, the power line 31 and the electric light line 3o are connected by a relay device 36 so that signals can be transmitted.

In block C of FIG. 2, reference numeral 38 is a transformer, and an electric winding 38a for a lamp and an electric winding 38b for power are formed on the secondary side. The power line 30 is connected to this secondary electric winding 38a, and the power line 31 is connected to the secondary electric winding 38b. The relay device 36 includes a plurality of (two in the unembodied example) modems 40 and 42, the modem 40 being connected to the power line 31, and the modem 42 being connected to the power line 30. The monitoring signal from the cooling tower 10 side is once demodulated by the modulator 4o, then modulated again by the modulator 40, and sent to the modulator 34 via the power line 30. Further, the operation signal from the control device main body 32 is demodulated by the modem 42, then modulated by the modem 4o, and sent to the modem 28 via the power line 31.

In this way, for example, even if only a 200-port power line is wired to the building and only a loo-port power line is wired to the basement, signals can be transmitted via the relay device 36. can.

In the present invention, various kinds of modulators can be used as the modulator/demodulator, and for example, a spread spectrum modulator can be used. This spread spectrum method is
Due to the uniform dispersion of information, stable data transmission is possible as long as the average power of the constant value device 1- reaches the receiving end, regardless of local distortion (noise) in the transmission characteristics. Therefore, accurate signal transmission and reception can be performed even when using electric light lines or the like.

Other modulation and demodulation methods include amplitude modulation, frequency modulation, and phase modulation, but these methods may be employed if consideration is given to avoid being influenced by corona noise or load noise.

] In the second embodiment, a cooling tower is shown as the air conditioning equipment, but the present invention can be applied to collective monitoring and control of boiler water system air conditioning equipment installed in a building other than the cooling tower. Further, by monitoring and controlling the operation panels of the refrigerator, boiler, etc., the operating status of the refrigerator, boiler, etc. can be monitored and controlled, and the effectiveness of water treatment can be confirmed. In addition, the air conditioning management information collected via power lines or power lines is sent to other locations using telephone lines, etc., allowing the air conditioning equipment of multiple buildings to be monitored by one central management department. It is also possible to control.

[Effects of the Invention] As detailed above, according to the present invention, air conditioning equipment can be monitored and controlled without installing a dedicated line. Therefore, there is no need to install a dedicated line when constructing a building, and even when installing or adding air conditioning equipment to an existing building, there is no need to install or add a dedicated line, reducing construction costs and equipment installation costs. be able to.

[Brief explanation of drawings]

1 and 2 are system diagrams each illustrating the present invention in detail. DESCRIPTION OF SYMBOLS 10... Cooling tower, 16... Piping for supplying makeup water, 18... Piping for chemical injection, 2o... Opening/closing valve, 22
... Chemical injection pump, 24 ... Water quality monitoring sensor, 26 ... Coupling device, 2
8.34.40.42...Modulator/demodulator, 30...Light line, 31...Power line, 36...Relay device, 38...Transformer.

Claims (4)

[Claims] (1) In buildings where air conditioning equipment such as refrigerators or cooling towers is installed at a predetermined location in the building, and the control device for this air conditioning equipment is installed in a location separated from the air conditioning equipment, the control device from the air conditioning equipment The monitoring signal sent to the building and the operation signal sent from the control device to the air conditioning equipment are modulated and demodulated by a modem and are transmitted through electrical wiring for electric lights or power that is wired within the building. Control equipment for air conditioning equipment in buildings. (2) The modem includes a first modem installed between the electrical wiring and the air conditioning equipment, and a second modem installed between the electrical wiring and the control device. Control of air conditioning equipment in a building according to claim 1, characterized in that a coupling device for inputting/outputting a monitoring signal and an operation signal is provided between the first modem and the first modulator/demodulator. Device. (3) The air conditioning equipment is a cooling tower, and the monitoring signals thereof include a cooling water circulation pump activation signal, a chemical injection pump activation signal, a water quality detection signal, and a makeup water supply valve opening/closing signal. A control device for air conditioning equipment in a building according to item 1 or 2. (4) One of the air conditioning equipment and the control device is connected to the power line,
The other is connected to a power line, and the power line and the power line are coupled to enable signal transmission by a relay device equipped with a plurality of modems. The control device for air conditioning equipment in a building according to any one of Item 3.