CN203797879U - Air conditioner controller based on power line carriers - Google Patents

Abstract

The utility model discloses an air conditioner controller based on a power carrier, which includes a plurality of nodes with the same structure, one of which is the master node, and the rest of the nodes are slave nodes, and each node is composed of a carrier communication chip PL3106, a power amplifier circuit , filter shaping circuit, filter receiving circuit, and carrier coupling circuit. The carrier communication chip PL3106 in the master node is connected to the external host computer through the communication bus. The carrier communication chip PL3106 in each slave node is connected to the air conditioning control module and connected to the temperature and humidity Acquisition module, clock module, keyboard module. The utility model uses the power line as the information transmission channel, which can conveniently implement centralized control of the air conditioner in the warehouse, and saves the wiring project, and has the advantages of high reliability, less investment, quick effect, and synchronization with the construction of the power grid.

Description

Air Conditioning Controller Based on Power Carrier

technical field

The utility model relates to the field of air-conditioning control systems, in particular to an air-conditioning controller based on a power carrier.

Background technique

In the process of keeping books and archives in libraries and archives, there are strict requirements on the temperature, humidity and other parameters of the warehouse. The "Interim Regulations on Technical Management of Archives Warehouse" promulgated by the state pointed out that: the temperature of the warehouse should be controlled at 14-24 °C, and the daily variation range should not exceed ±2 °C; the relative humidity should be controlled at 45-60%, and the daily variation range should not exceed ±2 °C. 5%. At present, due to factors such as scale and funding, many domestic libraries and archives usually use multiple household cabinet air conditioners to control the temperature and humidity of the warehouse. Because this method cannot monitor the temperature and humidity of the warehouse in real time, the control points are scattered, and the air-conditioning equipment must be activated on site to adjust the temperature and humidity, so the work efficiency is very low and it is not easy to manage.

Utility model content

The purpose of the utility model is to provide an air conditioner controller based on electric power carrier to solve the problem of inconvenient air conditioner management in libraries and archives in the prior art.

In order to achieve the above object, the technical solution adopted in the utility model is:

The air conditioner controller based on power carrier is characterized in that it includes multiple nodes with the same structure, one of which is the master node, and the remaining nodes are slave nodes, and each node is composed of carrier communication chip PL3106, power amplifier circuit, filter shaping circuit, filter receiving circuit, and carrier coupling circuit. The carrier communication chip PL3106 is integrated with an MCU and a spread spectrum modulation and demodulation module connected to the MCU. The spread spectrum modulation and demodulation module of the carrier communication chip PL3106 in each node passes through The power amplifier circuit, the filter shaping circuit are connected to the input end of the carrier coupling circuit, the output end of the carrier coupling circuit is connected to the input end of the filter receiving circuit, the output end of the filter receiving circuit is connected to the spread spectrum modulation and demodulation module of the carrier communication chip PL3106, each node is respectively Coupled to the 220V power line through their respective carrier coupling circuits, wherein the carrier communication chip PL3106 in the master node is connected to the external host computer through the communication bus, and the carrier communication chip PL3106 in each slave node is respectively connected to the air conditioner control modules inside different air conditioners, and each slave node The carrier communication chip PL3106 is respectively connected with a temperature and humidity acquisition module, a clock module, and a keyboard module.

The air conditioner controller based on electric power carrier is characterized in that: each slave node is also connected with a memory module, an LCD display module, and an audible and visual alarm circuit on the carrier communication chip PL3106.

The air conditioner controller based on electric power carrier is characterized in that: the carrier communication chip PL3106 in the master node is connected to an external host computer through RS232 bus.

The utility model is based on the power carrier, takes the carrier communication chip PL3106 as the control core, uses the power carrier communication to realize the communication between the master node and the slave node, and realizes the mutual communication between the master node and the upper computer through the RS232 bus as a link.

In the utility model, the carrier communication chip PL3106 of the slave node controls and collects on-site data (temperature and humidity) and controls on-site equipment (air conditioner), and uploads the data to the upper computer in the main control room through the power carrier, and the upper computer analyzes the uploaded data. Data and make decisions, and then through the power carrier to reach the alarm in the room where the slave node is located, and control the air conditioner through the slave node to make the environment of the room reach a normal level.

The utility model uses the power line as the information transmission channel, uses the existing AC power line as the communication line, can conveniently implement centralized control of the air conditioner in the warehouse, and saves the wiring project, and has high reliability, less investment and quick results , Synchronization with power grid construction and other advantages.

Description of drawings

Fig. 1 is a structural block diagram of the utility model.

Detailed ways

As shown in Figure 1. The air conditioner controller based on power carrier includes multiple nodes with the same structure, one of which is the master node, and the rest are slave nodes. Each node is composed of carrier communication chip PL3106, power amplifier circuit, filter shaping circuit, filter receiver circuit and carrier coupling circuit. The carrier communication chip PL3106 integrates MCU and the spread spectrum modulation and demodulation module connected to the MCU. The spread spectrum modulation and demodulation module of the carrier communication chip PL3106 in each node passes through the power amplifier circuit, filter and The circuit is connected to the input end of the carrier coupling circuit, the output end of the carrier coupling circuit is connected to the input end of the filter receiving circuit, the output end of the filter receiving circuit is connected to the spread spectrum modulation and demodulation module of the carrier communication chip PL3106, and each node is coupled through its own carrier coupling circuit To the 220V power line, the carrier communication chip PL3106 in the master node is connected to the external host computer through the communication bus, and the carrier communication chip PL3106 in each slave node is connected to the air conditioning control module inside different air conditioners, and the carrier communication chip PL3106 in each slave node The temperature and humidity acquisition module, clock module and keyboard module are respectively connected.

The carrier communication chip PL3106 in each slave node is also connected with a memory module, an LCD display module, and an audible and visual alarm circuit.

The carrier communication chip PL3106 in the master node is connected with the external host computer through the RS232 bus.

The carrier communication chip PL3106 is adopted in the utility model. Since the carrier communication chip PL3106 adopts new technologies such as direct sequence spread spectrum, digital signal processing, direct digital frequency synthesis, etc. etc. have more outstanding performance. If a foreign power carrier chip is used, first of all, its price is higher than that of a domestic carrier communication chip, and secondly, it is more difficult to develop.

In the utility model, it is necessary to detect the temperature and humidity in the room, which is mainly used in places such as libraries and archives, so there are certain requirements for measurement accuracy. There are PXS-10 digital temperature and humidity sensors from Shenzhen Parallel Automation System Co., Ltd., and SHT10 from Switzerland. A series of temperature and humidity sensors, etc., through the comparison of these two sensors, the Swiss SHT10 temperature and humidity sensor is fine in workmanship, small in size, low in energy consumption, and cheap in price. The error of measuring temperature and humidity is ±0.5% and ±4.5% respectively %, and PXS-10 has large measurement error and large volume, so the Swiss SHT10 temperature and humidity sensor is selected as the temperature and humidity acquisition module in the utility model.

In the utility model, the keyboard needs to be realized by setting temperature and humidity thresholds and time settings. After careful comparison, cost control and other issues are also taken into consideration, and the digital tube display driver and keyboard scanning management chip ZLG7290B designed by Guangzhou Zhou Ligong Single Chip Microcomputer Development Co., Ltd. is adopted. . This chip can directly drive 8-bit common-cathode digital tubes (or 64 independent LEDs), and can also scan and manage up to 64 keys. Eight of the keys can also be used as function keys, just like the Ctrl and Shift keys on a computer keyboard. In addition, ZLG7290B is also equipped with a combo counter, which can make a key continue to be effective without letting go after pressing it, and also has a hardware de-jitter function. Using the I2C bus mode, the interface with the microcontroller only needs two signal lines, saving IO port resources. Therefore, in the utility model, the keyboard module selects the ZLG7290B keyboard control chip.

In the utility model, the real-time display of the time needs to be realized, and parameters such as year, month, and day are also displayed. RTC clock chips commonly used have DS1339 and DS1302 of Dallas Company. If the DS1339 clock chip is adopted, the above functions can be realized, but The price is more expensive than DS1302, and most of the functions are idle. The DS1302 contains a real-time clock/calendar and 31 bytes of static RAM. The real-time clock/calendar circuit communicates with the microcontroller through a simple serial interface. The real-time clock/calendar circuit provides information on seconds, minutes, hours, days, dates, months, and years. The number of days in a leap year can be adjusted automatically, and the development is simple and the price is cheap, which can fully realize the functions required by the system design. Therefore, in the utility model, the clock module selects the DS1302 clock chip.

Adopt RS232 communication bus in the utility model, commonly used serial communication bus mainly contains RS-232, RS-485 mode etc. There are several types of serial communication interface standards through use and development. But they are all improved on the basis of RS-232 standard. The RS-232C standard is a communication protocol published in 1969 jointly developed by the US EIA (Electronic Industries Association) and BELL and other companies. It is suitable for communications with a data transmission rate in the range of 0 to 20000b/s. This standard clearly stipulates the relevant issues of the serial communication interface, such as signal line function and electrical characteristics. Because communication equipment manufacturers all produce communication equipment compatible with the RS-232C standard, it has been widely used in computer communication interfaces as a standard. Because only simple data needs to be transmitted in this design, there is not much limitation on the data transmission speed and transmission distance, and the RS232 transmission protocol is quite mature, and the adoption of the RS232 protocol has fully satisfied the transmission of the entire system. Therefore, the utility model adopts the RS232 bus to realize the communication connection between the master node and the upper computer.

Claims (3)

1. the air-conditioner controller based on power carrier, it is characterized in that: include the node that a plurality of structures are identical, one of them node is as host node, all the other nodes are as from node, each node is respectively by carrier communication chip PL3106, power amplification circuit, filtering shaping circuit, filtering receiving circuit, carrier wave coupling circuit forms, in described carrier communication chip PL3106, be integrated with the spread-spectrum modulation and demodulation module of MCU and access MCU, in each node, the spread-spectrum modulation and demodulation module of carrier communication chip PL3106 is passed through power amplification circuit successively, filtering shaping circuit is connected with carrier wave coupling circuit input, carrier wave coupling circuit output is connected with filtering receiving circuit input, filtering receiving circuit output is connected with the spread-spectrum modulation and demodulation module of carrier communication chip PL3106, each node is coupled to 220V power line by carrier wave coupling circuit separately respectively, wherein in host node, carrier communication chip PL3106 is connected with outside host computer by communication bus, each carrier communication chip PL3106 from node connects from the air-conditioning control module of different air-conditionings inside respectively, and each has access to respectively humiture collection module on carrier communication chip PL3106 from node, clock module, Keysheet module.

2. the air-conditioner controller based on power carrier according to claim 1, is characterized in that: each also has access to memory module, LCD display module, sound light alarming circuit from node on carrier communication chip PL3106.

3. the air-conditioner controller based on power carrier according to claim 1, is characterized in that: in host node, carrier communication chip PL3106 is connected with outside host computer by RS232 bus.