BG2028U1 - Induction heater for water - Google Patents

Abstract

The utility model refers to the induction heater for water and can be used to provide hot water for household needs in residential and industrial conditions. It has a high efficiency and high reliability. The induction heater for water contains water proprietor (1), which is a metal container with a cylindrical shape, the bottom of which is located the pipe for incoming cold water (2), the outgoing hot water pipe (3) and ground plate (4) to which the heat exchanger (20) is mounted. The water proprietor (1) has a thermal insulation layer (not shown in the figure), which is attached to the water proprietor (1) the first temperature sensor (8) for monitoring the temperature of the water proprietor. At the bottom, on the outside of the water proprietor (1) is located on Induction coil (5) with a parallel LC circuit (6), one end of which is connected to a semiconductor switch (7) and the second end is connected through consecutive smoothing filter (13) and a rectifier (12) to the output of the anti disturbing filter (11) whose input is connected to the network (17). To the entrance of the semiconductor switch (7) is connected to the output of a microcontroller (18), to whose inputs are connected to the sensor (8) for monitoring the temperature of the water proprietor, the second temperature sensor (9) mounted to the Induction coil (5), the third a temperature sensor (10) mounted to the semiconductor switch (7), block voltage monitoring of the pulsing circle (15), monitoring of power unit in the pulsing circles (16) and user interface (19). To the exit of anti disturbing filter (11) is connected to AC/DC converter (14), the output of which is connected to the power inputs of the microcontroller (18) and user interface (19).

Description

Field of technology

The utility model refers to an induction water heater used to provide hot water for domestic use in residential and industrial conditions.

BACKGROUND OF THE INVENTION

Induction heating is a well-known technology that is widely used in industry. In the last few years, induction heating is rapidly entering the home. Induction water heaters are known, consisting of a water container with a heat-insulating layer, to which an inlet water pipe and an outlet water pipe are mounted. An induction coil is located between the water tank and the thermal insulation layer. The induction coil is connected via a regulator to an AC source with a frequency of 50 Hz. The regulator consists of two circuit breakers and a temperature sensor, which is mechanically attached to the water tank.

Known induction heaters have low efficiency because heat dissipation is dissipated from the induction coil mounted around the water tank. The efficiency is also reduced by the losses in the induction coil due to the use of current with a frequency of 50 Hz.

Technical essence of the utility model

The induction water heater consists of a water tank with a thermal insulation layer, to which are mounted an inlet water pipe and an outlet water pipe, an induction coil and a temperature sensor for monitoring the temperature of the water tank mounted to the water tank. At the bottom of the water tank is mounted a heating plate, under which on the outside of the water tank is located the induction coil with a parallel oscillating circuit connected through a semiconductor switch to a rectifier. Connected to the control input of the semiconductor switch is the output of a microcontroller, to the inputs of which are connected the sensor for monitoring the temperature of the water tank, a second temperature sensor mounted to the induction coil, a third temperature sensor mounted to the semiconductor switch, a voltage monitoring unit circuit, current monitoring circuit in the oscillating circuit and user interface.

In order to increase the efficiency of heating and even heating of the water, it is expedient to install a heat exchanger, preferably made of metal, inside the water tank to the heating plate.

The advantages of the utility model are that the induction water heater has a high efficiency. In addition, reliable operation is ensured by continuous monitoring of the parameters of the individual elements of the heater.

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Explanation of the attached figure

The utility model is visualized and explained in more detail by the attached figure, which is a block diagram of the induction water heater 20.

Exemplary implementation of the utility model

The induction water heater comprises a water container 1, which is a cylindrical metal container, at the bottom of which are located the cold water inlet pipe 2, the hot water outlet pipe 3 and a heating plate 4, to which a heat exchanger 20 is mounted. 1 has a thermal insulation layer (not shown in the figure), under which a first temperature sensor 8 for monitoring the temperature of the water tank is attached to the water tank 1. To the bottom, on the outside of the water tank 1 is located 0 $ induction coil 5 with a parallel oscillating circuit 6, one end of which is connected to a semiconductor switch 7, and its other end is connected through series-connected smoothing filter 13, rectifier 12 to the output of the antis4Q mutation filter 11, the input of which is connected to the network 17. To the control input of the semiconductor switch 7 is connected the output of the microcontroller 18, to whose inputs are connected the sensor 8 for monitoring the temperature of the water45 container, the second temperature sensor 9 the induction coil 5, the third temperature sensor 10 mounted to the semiconductor switch 7, the oscillating circuit voltage monitoring unit 15, the oscillating circuit current monitoring unit 16 and user

2028 UI interface 19. An AC / DC converter 14 is connected to the output of the anti-interference filter 11, the output of which is connected to the power inputs of the microcontroller 18 and the user interface 19. 5

Using the utility model

The supply voltage coming from the network 17 passes through the anti-interference filter 11 and enters the input of the rectifier jq 12. To the output of the rectifier 12 is connected a smoothing filter 13, which provides high DC voltage to supply the oscillating circuit 6. The necessary low voltages to supply the control and monitoring circuits] 5 are made of an AC \ DC converter 14 connected after the anti-interference filter 11. The microcontroller 18 is connected to the user interface 19 and monitors the change of the heater operating parameters entered by 20 users. The control pulses are made by the microcontroller 18 and control the operation of the semiconductor switch 7. The semiconductor switch 7 switches the oscillating circuit 6 on and off to the high DC voltage present at the output of the smoothing filter 13.

Through the induction coil 5 in the conductive heating plate 4, eddy currents are generated from the created electromagnetic field, whereby it is heated due to the electromagnetic induction and from there the water is heated. To ensure the maximum power generated in the heating plate 4, it is necessary to control the switch 7 with a frequency equal to the resonant frequency of the oscillating circuit. The microcontroller 18 generates and supplies the control pulses to the switch 7 and monitors for the need for corrective actions through the voltage monitoring unit of the oscillating circuit 15 and the current monitoring unit in the circuit 16. 4θ

The temperature of the water in the water tank 1 is controlled by the microcontroller 18 by means of a temperature sensor 8. Through the temperature sensors 9 and 10 mounted next to the inductor 5 and the powerful semiconductor switch 7 the temperatures of the latter are monitored so that no operation is allowed. of the system outside the range of safe operation.

By using the heat exchanger 20 located in the water tank 1, the area for heat transfer to the water is multiplied, whereby the efficiency of its heating is increased.

Claims (2)

Claims An induction water heater comprising a water container with a thermal insulation layer to which an inlet water pipe, an outlet water pipe, an induction coil and a temperature sensor are mounted to the water tank, characterized in that at the bottom of the water tank (1) a heating plate (4) is mounted, under which the induction coil (5) with a parallel oscillating circuit (6) is located on the outside of the water tank (1), one end of which is connected to a semiconductor switch (7) and its other end is connected through a series-connected smoothing filter (13) and a rectifier (12) to the output of an anti-interference filter (11), the input of which is connected to the network (17) and the output of a microcontroller is connected to the control input of the semiconductor switch (7). 18), to whose inputs are connected the sensor (8) for monitoring the temperature of the water tank, a second temperature sensor (9) mounted to the induction coil (5), a third temperature sensor (10) mounted to the half the conductor switch (7), the oscillating circuit voltage monitoring unit (15), the oscillating circuit current monitoring unit (16) and the user interface (19), and a converter (14) is connected to the output of the anti-interference filter (11). ), the output of which is connected to the power inputs of the microcontroller (18) and the user interface (19). Induction water heater according to claim 1, characterized in that a heat exchanger (20) is mounted inside the water tank (1) to the heating plate (4).