CN209944764U - Electric heating control system efficiently utilizing photovoltaic direct heat - Google Patents

Abstract

An electric heating control system for efficiently utilizing photovoltaic direct heat. The photovoltaic module and the AC power supply for the AC heating tube; the DC wide voltage input control circuit part includes an AC/DC power conversion module, a DC relay, a thermal circuit breaker, and a self-recovery thermostat; the high-efficiency photovoltaic direct heat The logic control part includes a standby state and an instant heating state. In the standby state, the photovoltaic module provides electrical energy to heat the water in the heat storage tank; in the instant heating state, the photovoltaic heating and the mains heating work at the same time to reach the preset water temperature and automatically turn Heating for photovoltaics. The utility model can maximize the conversion of photovoltaic direct current electric energy into stored water thermal energy, thereby improving the utilization of green energy; and by increasing the water temperature of the stored water, the equivalent capacity of the electric water heater can be increased.

Description

An Electric Heating Control System Using Photovoltaic Direct Heat Efficiently

technical field

The utility model relates to a light utilization technology, in particular to an electric heating control system for efficiently utilizing photovoltaic direct heat.

Background technique

Photovoltaic is a kind of photoelectric utilization, which directly converts the radiant energy of solar energy into direct current electricity. It has no mechanical transmission in the whole process, zero carbon emission, and has a life span of up to 25 years. It is a kind of green and clean energy. The combination of photovoltaic and electric water heaters uses photovoltaic modules to replace solar collectors, and provides electricity to the heating pipes of electric water heaters.

However, the voltage of the photovoltaic output DC power fluctuates with the change of the light intensity. The existing photovoltaic direct heat electric water heater can only utilize photovoltaic direct current power within a certain voltage range, and there is a problem of low utilization rate of photovoltaic direct heat.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is to aim at the deficiencies of the prior art, and proposes an electric heating control system that efficiently utilizes the photovoltaic direct heat, which can greatly improve the utilization rate of the photovoltaic direct heat.

The technical problem to be solved by the present utility model is achieved through the following technical solutions, an electric heating control system for efficiently utilizing photovoltaic direct heat, which is characterized by: including a heat storage part, a DC wide voltage input control circuit part and a high-efficiency photovoltaic direct heat Thermal logic control section,

The heat storage part includes a heat storage inner tank, a direct current heating pipe and an alternating current heating pipe are arranged in the heat storage inner tank, and a photovoltaic component for supplying power to the direct current heating pipe and an AC power supply for the alternating current heating pipe are arranged outside the heat storage inner tank. power supply;

The DC wide voltage input control circuit part includes an AC/DC power conversion module, a DC relay, a thermal circuit breaker, and a self-recovery thermostat. The electric energy of the direct current on and off; the thermal circuit breaker detects the temperature of the water in the heat storage tank, and when the safe temperature T1 is exceeded, the direct current circuit is disconnected (to protect the safety of the electric water heater.) The self-recovery thermostat can set the temperature T2 ( T2 must be less than T1), when the storage water temperature reaches T2, the self-recovery thermostat disconnects the DC circuit;

The high-efficiency photovoltaic direct heating logic control part includes a standby state and an instant heating state:

In the standby state, through the DC wide voltage input control circuit, the DC power of the photovoltaic module can be fully supplied to the DC heating tube within the range of 0V to the rated voltage to heat the water in the heat storage tank;

In the instant heating state, the AC heating tube and the DC heating tube work at the same time to heat the water in the heat storage liner and quickly reach the preset water temperature, and then the AC heating tube stops working, and the DC heating tube continues to heat, continuously improving the heat storage liner. After reaching the set limit temperature, it will be interrupted under the control of the DC wide voltage input control circuit.

The technical problem to be solved by the utility model can be further realized by the following technical solutions: the DC electric heating tube is installed on the flange alone, or integrated with the AC electric heating tube on a flange to form an AC-DC integrated heater.

The technical problem to be solved by the utility model can also be further realized by the following technical solutions, the heat storage inner tank is a double tank combined structure.

The technical problem to be solved by the present invention can be further realized by the following technical solutions, the self-recovery temperature controller can set the temperature T2 to be lower than the safety temperature T1.

Compared with the prior art, the utility model includes a DC wide voltage input control circuit and a high-efficiency photovoltaic direct heating logic control, which can increase the available range of the photovoltaic power generation direct current voltage of the photovoltaic electric water heater, and maximize the conversion of photovoltaic direct current electric energy into storage Water thermal energy, improve the utilization of green energy; and increase the equivalent capacity of the electric water heater by increasing the water temperature of the water storage.

Description of drawings

Fig. 1 is the structural sketch map of the present utility model;

Figure 2 is a DC wide voltage input control circuit;

Figure 3 is a block diagram of high-efficiency photovoltaic direct heating logic control.

Detailed ways

The specific technical solutions of the present invention are further described below, so as to facilitate those skilled in the art to further understand the present invention, but not to limit the rights thereof.

An electric heating control system for efficiently utilizing photovoltaic direct heat, comprising a heat storage part, a DC wide voltage input control circuit part and a high-efficiency photovoltaic direct heat logic control part,

The heat storage part includes a heat storage inner tank, a direct current heating pipe and an alternating current heating pipe are arranged in the heat storage inner tank, and a photovoltaic component for supplying power to the direct current heating pipe and an AC power supply for the alternating current heating pipe are arranged outside the heat storage inner tank. power supply;

The DC wide voltage input control circuit part includes an AC/DC power conversion module, a DC relay, a thermal circuit breaker, and a self-recovery thermostat. The AC power supply supplies power to the coil of the DC relay through the AC/DC power conversion module to provide control photovoltaic The electric energy of the direct current on and off; the thermal circuit breaker detects the temperature of the water in the heat storage tank, and when the safe temperature T1 is exceeded, the direct current circuit is disconnected to protect the safety of the water heater. The self-recovery thermostat can set the temperature T2. When the storage water temperature reaches T2, the self-recovery thermostat disconnects the DC circuit;

The high-efficiency photovoltaic direct heating logic control part includes a standby state and an instant heating state:

In the standby state, through the DC wide voltage input control circuit, the DC power of the photovoltaic module can be fully supplied to the DC heating tube within the range of 0V to the rated voltage to heat the water in the heat storage tank;

In the instant hot state, the AC heating tube and the DC heating tube work at the same time to heat the water in the heat storage liner and quickly reach the preset water temperature, then the AC heating tube stops working, and the DC heating tube continues to heat, continuously improving the heat storage liner. After reaching the set limit temperature, it will be interrupted under the control of the DC wide voltage input control circuit.

The DC heating tube is installed on the flange alone, or integrated with the AC heating tube on a flange to form an AC/DC integrated heater.

The heat storage liner has a single liner with a double liner combined structure. The double bladders are connected to each other, and the direct current heating tube and the alternating current heating tube can be respectively arranged in different inner bladders.

The self-recovery thermostat can set the temperature T2 to be lower than the safe temperature T1.

specific:

The DC wide voltage input control circuit (1) is composed of an AC/DC power conversion module (8), a DC relay (9), a thermal circuit breaker (10), and a self-recovery thermostat (11). The alternating current supplies power to the coil of the direct current relay (9) through the AC/DC power conversion module (8), and provides electric energy for controlling the on-off of the photovoltaic direct current. The thermal circuit breaker (10) disconnects the direct current circuit by detecting the temperature of the water in the inner tank and when the safe temperature T1 is exceeded, so as to protect the safety of the electric water heater. The self-recovery thermostat (11) can set the temperature T2 (T2 must be less than T1). When the storage water temperature reaches T2, the self-recovery thermostat (11) disconnects the DC circuit.

The high-efficiency photovoltaic direct heating logic control part includes two states: standby state and instant heating state.

In the standby state, through the DC wide voltage input control circuit (1), the DC power of the photovoltaic module (2) can be fully supplied to the DC heating tube (3) within the range of 0V to the rated voltage, heating the heat storage tank (4). water storage.

In the instant heating state, the alternating current heating tube (5) and the direct current heating tube (3) work simultaneously to heat the water stored in the heat storage inner tank (4) to quickly reach the preset water temperature. After that, the AC heating tube stops working, the DC heating tube (3) continues to heat, and continues to increase the temperature of the water stored in the heat storage liner until it reaches the set limit temperature, and is interrupted under the control of the DC wide voltage input control circuit (1).

The DC electric heating tube (3) is installed on the flange plate alone, or integrated with the AC electric heating tube on a flange to form an AC-DC integrated heater. The heat-storage inner tank (4) is a single-tank electric water heater, or a double-tank fast-heating electric water heater composed of two inner tanks.

Under different lighting conditions, the working voltage of the photovoltaic module (2) fluctuates between 0 and the rated voltage. Through the DC wide voltage input control circuit (1), it can be fully supplied to the DC heating tube (3) for use, so as to improve the photovoltaic power generation of the photovoltaic electric water heater. DC voltage available range.

In the instant heating mode, the AC heating tube (5) of the AC supply from the commercial power is used to heat the water in the double-tank water storage tank (3), while the DC heating circuit is not cut off, and the photovoltaic module (2) sends out DC power through the DC wide voltage input control circuit (1) Supplying the DC heating tube (3) and heating the storage water at the same time can increase the speed of reaching the preset water temperature.

In the instant heating mode, when the stored water reaches the preset temperature, the AC heating stops working. At this time, the DC heating circuit still works until the limit temperature of the electric hot water tank is reached, and the DC wide voltage input control circuit (1) cuts off the DC supply. This working method can maximize the conversion of photovoltaic electric energy into stored water thermal energy, improve the utilization of green energy; and increase the equivalent capacity of the electric water heater by increasing the water temperature of the stored water.

Claims (4)

1. An electric heating control system for efficiently utilizing photovoltaic direct heat, characterized in that: it comprises a heat storage part, a direct current wide voltage input control circuit part and a high-efficiency photovoltaic direct heat logic control part, The heat storage part includes a heat storage inner tank, a direct current heating pipe and an alternating current heating pipe are arranged in the heat storage inner tank, and a photovoltaic component for supplying power to the direct current heating pipe and an AC power supply for the alternating current heating pipe are arranged outside the heat storage inner tank. power supply; The DC wide voltage input control circuit part includes an AC/DC power conversion module, a DC relay, a thermal circuit breaker, and a self-recovery thermostat. The AC power supply supplies power to the coil of the DC relay through the AC/DC power conversion module to provide control photovoltaic The electric energy of direct current on and off; the thermal circuit breaker detects the temperature of the water in the heat storage tank, and when it exceeds the safe temperature T1, the direct current circuit is disconnected; the self-recovery thermostat can set the temperature T2, when the temperature of the storage water reaches T2 , the self-recovery thermostat disconnects the DC circuit; The high-efficiency photovoltaic direct heating logic control part includes a standby state and an instant heating state: In the standby state, through the DC wide voltage input control circuit, the DC power of the photovoltaic module can be fully supplied to the DC heating tube within the range of 0V to the rated voltage to heat the water in the heat storage tank; In the instant hot state, the AC heating tube and the DC heating tube work at the same time to heat the water in the heat storage liner and quickly reach the preset water temperature, then the AC heating tube stops working, and the DC heating tube continues to heat, continuously improving the heat storage liner. After reaching the set limit temperature, it will be interrupted under the control of the DC wide voltage input control circuit. 2. The electric heating control system for efficiently utilizing photovoltaic direct heat according to claim 1, characterized in that: the direct current heating pipe is installed on the flange alone, or is integrated with the alternating current heating pipe on a flange to form an alternating current and direct current Integrated heater. 3 . The electric heating control system for efficiently utilizing photovoltaic direct heat according to claim 1 , wherein the heat storage inner tank is a double tank combined structure. 4 . 4 . The electric heating control system for efficiently utilizing photovoltaic direct heat according to claim 1 , wherein the self-recovery thermostat can set the temperature T2 to be lower than the safe temperature T1 . 5 .

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