CN201680622U - Solar auxiliary heating control system - Google Patents

Abstract

The utility model provides a solar auxiliary heating control system, comprising an input unit, a control unit and an output unit, wherein the input unit comprises a solar water-temperature water-level sensor, an indoor temperature collector and a photoelectric detection circuit, and the output unit comprises a domestic hot water module, a heating module, a photo-electricity and mains conversion module and gas auxiliary-heating equipment. The input unit is used for collecting a signal and transmitting the signal to the control unit, and then the output unit is controlled to work by signal processing after the control unit judges the signals. The solar auxiliary heating control system effectively solves the problem of combining control of a solar water heating system and a heating system and realizes automatic switching of photo-electricity and mains.

Description

A solar-assisted heating control system

technical field

The utility model relates to a control system, in particular to a solar auxiliary heating control system, in particular to the combined control of solar hot water and auxiliary heating.

Background technique

As we all know, solar energy is an inexhaustible green new energy, which is widely used in power generation, life, construction and many other fields. For example, solar thermal power generation, solar photovoltaic power generation, solar water heaters, solar buildings and so on.

However, in terms of solar energy utilization, there is a lack of an automatic control system that can combine solar water heating, solar auxiliary heating and photoelectric switching, which hinders the effective use of solar energy in buildings.

Contents of the invention

The purpose of this utility model is to provide a solar-assisted heating control system for the defects of the above-mentioned prior art, which is an automatic control system that can combine solar hot water, solar-assisted heating and photoelectric switching.

In order to achieve the above object, the technical solution adopted by the utility model is: a solar auxiliary heating control system, including an input unit, a control unit and an output unit, the input unit includes a solar water temperature and level sensor, an indoor temperature collector and a photoelectric detection circuit, and the output unit It includes domestic hot water module, heating module, photoelectric mains conversion module and gas auxiliary heating equipment. Among them, the input unit is used to collect signals and transmit the signals to the control unit. After the control unit judges, it controls the output unit to work through signal processing.

Specifically, the indoor temperature collector includes a temperature sensor and an indoor temperature acquisition circuit connected thereto, and the indoor temperature acquisition circuit includes an LM324 amplifying circuit and a voltage dividing circuit connected thereto.

Specifically, the solar auxiliary heating control system is connected to a photovoltaic system, and the photoelectric detection circuit mainly includes a voltage dividing resistor connected in series with the output power of the photovoltaic system, an optocoupler connected in series with the voltage dividing resistor, and an optocoupler connected in parallel the filter capacitor.

Specifically, the photoelectric mains conversion module includes a photoelectric mains switching circuit, and the photoelectric mains switching circuit mainly includes 2-2 relays, 2-4 relays and a 2003 input-output reverse driver.

Specifically, the domestic hot water module includes a solar water heater, and the gas auxiliary heating equipment is a wall-hung boiler.

The beneficial effects of the utility model are: compared with the prior art, the utility model adopts a structure mainly composed of an input unit, a control unit and an output unit, wherein the system has multi-channel automatic detection of indoor temperature and controls the temperature according to the program algorithm. The temperature information is processed accordingly, so that the heating temperature meets the user's requirements; at the same time, the system also has a photoelectric detection circuit and a photoelectric mains conversion module. And control the automatic switching of the corresponding photoelectric switching module. Therefore, the utility model effectively solves the problem of combined control of the solar water heating system and the heating system, and can realize automatic switching between photoelectricity and commercial power.

Description of drawings

Fig. 1 is the general diagram of the control principle of the solar energy auxiliary heating control system described in the utility model;

Fig. 2 is a schematic diagram of the temperature acquisition circuit described in the utility model;

Fig. 3 is the solar energy auxiliary heating control flow chart described in the utility model;

Fig. 4 is a schematic diagram of the photoelectric detection circuit described in the utility model;

Fig. 5 is a schematic diagram of the photoelectric switching circuit described in the utility model;

Fig. 6 is a control schematic diagram of the photoelectric and mains switching unit described in the utility model.

In the figure: 100 input unit, 101 solar water temperature and water level sensor, 102 indoor temperature collector, 103 photoelectric detection circuit;

200 control units;

300 output unit, 301 household hot water module, 302 heating module, 303 photoelectric mains conversion module, 304 gas auxiliary heating equipment.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

As shown in FIG. 1 , the solar auxiliary heating control system described in the present invention includes an input unit 100 , a control unit 200 and an output unit 300 . The input unit 100 includes a solar water temperature and level sensor 101 , an indoor temperature collector 102 and a photoelectric detection circuit 103 . The output unit 300 includes a domestic hot water module 301 , a heating module 302 , a photoelectric-mains conversion module 303 and a gas auxiliary heating device 304 . Wherein, the input unit 100 is used for collecting signals and transmitting the signals to the control unit 200 , and the control unit 200 controls the output unit 300 to work through signal processing after judgment. Specifically, the domestic hot water module 301 includes a solar water heater, and the gas auxiliary heating device 304 is a wall-hung boiler.

The working principle of the utility model: firstly control the water volume and water temperature of the solar water heater to meet the requirements of bathing, the control unit can judge which season it is in according to the month and detect whether the temperature meets the heating requirements, and then decide whether to start the hot water circulation pump to use Hot water at a certain temperature enters the preset coil to heat the indoor temperature. Once the solar hot water temperature does not meet the heating demand conditions, the control unit will automatically start the gas wall-hung boiler to heat the warm water in the solar energy, which not only meets the heating requirements but also meets the heating requirements. The purpose of the most energy-saving.

In this example, the control unit includes a display module and a host circuit board. Among them, the display module uses μPD78F0455 as the main chip, and adopts LCM240*128 dot matrix liquid crystal display, which can realize the diversification of the display interface. The host circuit board uses ST72F324BJ6T6 as the main chip, and the switching power supply made by switching power supply chip TNY280PN supplies power to the host circuit board. The host circuit board can be divided into several modules: clock module, memory module, RS485 communication module and signal amplifier circuit. PCF8563 clock chip and AT24C02 memory chip are used respectively, because the clock chip is a CMOS low-power device, even in the case of power failure, only a weak current can guarantee the operation of the clock. The RS485 communication between the host circuit board and the display adopts the SN65LBC184D special chip, which has high communication speed and anti-lightning ability. The operation buttons adopt touch buttons, which have a long service life.

As shown in Figure 2, the indoor temperature collector includes a temperature sensor and an indoor temperature acquisition circuit connected to it. In this example, the heat sensor HYC-GB-φ415 produced by Himin Solar Energy Co., Ltd. is used as the water temperature and water level sensor. In specific implementation, other water temperature and water level sensors in the prior art can also be used. In this example, four temperature collectors are specifically used, which are respectively placed at the corners of different planes of the floor and the roof, so that the indoor temperature information can be collected comprehensively. As shown in Figure 2, the indoor temperature acquisition circuit specially adds a voltage follower for each temperature acquisition sensor. Four amplifiers in the LM324 can be used to form four voltage followers to meet the needs of the control system. Take the first voltage follower corresponding to the temperature acquisition sensor W1 as an example to illustrate, in which the temperature voltage signal is obtained by dividing the voltage of R1 and RN1, and the temperature voltage signal is introduced into the input terminal LM324 of the large impedance voltage follower 1 On the No. pin, and at the temperature acquisition sensor W1, that is, the No. 3 pin of the LM324 outputs a voltage signal of the same magnitude. The temperature acquisition sensors W2, W3, and W4 output in the same way. Among them, the temperature and voltage signal can be accurately transmitted to the central processing unit interface through the isolation of the voltage follower, which is beneficial to the processing and analysis of the signal.

The control principle of the indoor temperature collector 102 is shown in Figure 3. After the heating temperature range is set, the room temperature is detected by four temperature sensors in the room, and the temperature information is transmitted to the main control unit, which judges whether it meets the set requirements. ; If the main control unit determines that the temperature is lower than the set temperature and the water temperature in the water tank of the solar water heater meets the heating conditions, the hot water produced by solar energy will be used first; if the water temperature of solar energy is not enough to provide indoor heating, the control system will automatically start the gas wall-hung boiler to meet heating needs.

The system of the utility model can control various devices according to the setting, and the power supply is provided by photoelectricity or commercial power. See Figure 6 for the schematic diagram of the mains switching system. The photoelectric switching module can detect the output voltage of the photovoltaic system, and can automatically control the switching between mains and photoelectricity according to the settings. In terms of power usage, it can be manually set through the dial switch on the circuit board. For example, when a device is set to be powered by photovoltaics, when the system detects that the photovoltaic system has no voltage output, it will automatically switch to the mains power supply to ensure the normal operation of the device.

As shown in Figure 4, the photoelectric detection circuit, that is, the schematic diagram of the low voltage detection circuit, in which a 150k/2W resistor R02 is connected in series with the output power of the photovoltaic system. The isolation transmits the detection signal to the processor interface, and the photoelectric detection terminal can output a very stable low-level waveform after being filtered by the pull-up resistor R03 and filter capacitors E03 and C03, otherwise, it outputs a high level. In addition, a reverse diode D01 is specially added to extend the life of the optocoupler IC02.

As shown in Figure 5, it is a branch in the photoelectric switching circuit, the main components are 2-2 relay RY01, 2-4 relay RY02 and a 2003 input and output reverse driver IC05, thus forming a photoelectric mains switching and output activation and deactivation. The specific working principle is that the control unit sends control commands to the input and output reverse driver IC05, and the output of the IC05 driver reverses and amplifies the corresponding input level, which can realize the small signal driving the large signal relay, and also installs an indicating diode LED1, it is convenient to visually feel its activation when the relay is activated.

Compared with the lack of a control system capable of combining the solar water heating system and the heating system in the prior art, the utility model adopts a structure mainly composed of an input unit, a control unit and an output unit, wherein the system has multiple indoor temperature automatic control systems. Detect and process the temperature information accordingly according to the program algorithm, so that the heating temperature meets the user's requirements; at the same time, the system also has a photoelectric detection circuit and a photoelectric mains conversion module. Specifically, by detecting whether the output voltage of the photovoltaic system meets the requirements, and then After corresponding processing by the control unit, the automatic switching of the corresponding photoelectric switching module is controlled. Therefore, the utility model effectively solves the problem of combined control of the solar water heating system and the heating system, and can realize automatic switching between photoelectricity and commercial power.

The above-mentioned embodiment is only a kind of preferred embodiment of the utility model, and the usual changes and replacements carried out by those skilled in the art within the scope of the technical solutions of the utility model should be included in the protection scope of the utility model Inside.

Claims (5)

1. A solar energy auxiliary heating control system, characterized in that: comprise an input unit, a control unit and an output unit, the input unit comprises a solar water temperature and water level sensor, an indoor temperature collector and a photoelectric detection circuit, and the output unit comprises a household hot water module, a heating Module, photoelectric mains conversion module and gas auxiliary heating equipment, wherein the input unit is used to collect signals and transmit the signals to the control unit, and the control unit controls the output unit to work through signal processing after judgment. 2. The solar energy-assisted heating control system according to claim 1, characterized in that: the indoor temperature collector includes a temperature sensor and an indoor temperature acquisition circuit connected thereto, and the indoor temperature acquisition circuit includes an LM324 amplifier circuit and a The connected voltage divider circuit. 3. The solar assisted heating control system according to claim 1, characterized in that: the solar assisted heating control system is connected to a photovoltaic system, and the photoelectric detection circuit mainly includes a voltage dividing resistor connected in series with the output power of the photovoltaic system , an optocoupler connected in series with the voltage dividing resistor, and a filter capacitor connected in parallel with the optocoupler. 4. The solar auxiliary heating control system according to claim 1, characterized in that: the photoelectric mains conversion module includes a photoelectric mains switching circuit, and the photoelectric mains switching circuit mainly includes 2-2 relays, 2-4 relays and a 2003 I/O backdriver. 5. The solar-assisted heating control system according to any one of claims 1-4, wherein the household hot water module includes a solar water heater, and the gas-assisted heating equipment is a wall-hung boiler.

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