SK5787Y1 - Device for combined heating water using AC and DC current - Google Patents

Abstract

Device for combined heating water using AC and DC current characterized in that it consists of terminal (X1), which is then connected to protective earth (PE), which is further connected to a thermostat (T2) and to thermostat (T1), the terminal (X2) is then connected to live wire (L), which is further connected to a thermal fuse (TP) and through contact (Y1) thermal fuse (TP) is further connected to a thermostat (T2) and thermostat (T1), the thermostat (T2 ) continues through the collapsible contact to input (A1) of contactor coils (ST), a thermostat (T1) is connected through the collapsible contact to the driver (L), which is connected to a spiral (R1), the terminal (X3) is then connected to neutral wire (N), which is connected to thermal fuse (TP) and through contact (Y2) thermal fuse (TP) is connected to the input (A2) of contactor coils (ST) and goes on and attached to the spiral (R1), the terminal (X4) is then connected to live wire DC current (L +), from where it is connected to the contactor (ST) to the input terminals of the switching contacts (1), via the output terminal of switch contacts (6) of contactor (ST) is connected to a spiral (R2) to the terminal (X5 ) is then connected to neutral DC current (L-), from where it is attached to a spiral (R2), the output wire from the thermostat (T2) and the output of the contact wire (Y2) of thermal fuse (TP) is connected to LED diode (LED 1) to enter wires into a spiral (R1) is connected LED diode (LED 3) and the input wires of the coil (R2) are connected to LED diode (LED 2).

Description

Boiler water heating with two heating coils with AC and DC power supply.

BACKGROUND OF THE INVENTION

At the present time, the electric heating of water in boilers uses exclusively AC current from the mains. The DC direct current for direct water heating is not used due to its aggressive characteristic, which causes the contacts in the switching and opening devices of the thermal regulators and thermal fuses to burn, thus rendering the whole device inoperable.

The essence of the technical solution

The device for combined water heating by means of AC and DC current, which is the object of the present invention, allows the use of DC direct current for water heating, while respecting all safety requirements associated with the thermal and regulatory protection of the water reservoir. The device allows water heating by means of two separate coils located in one water reservoir, one being supplied with direct current DC and the other with alternating AC current. The spirals can work in combination - each separately or together, each with its own thermostat, and this allows additional combinations to heat the water in the tank. The essence of the technical solution is to create a separate DC circuit and a separate AC circuit, which are connected only mechanically by a contactor. The DC circuit is only used to heat the water using the first coil.

The AC circuit is used to heat water with a second coil and to provide thermal control and protection for both coils.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows a diagram of a device for combined water heating using AC and DC current.

EXAMPLES

The boiler, in which the equipment for combined water heating by means of AC and DC current is installed, is connected to the source of alternating current by means of terminal blocks XI. X2. X3. At the same time, it is connected to the direct current source, which is made up of photovoltaic panels, via terminal blocks X4 and X5. The amount of PV modules used and the DC power output achieved must be the same as that of the R2 spiral, which is only connected to the photovoltaic panels. For example, 4 PV modules with an output of 250 W / l are a power source of max. 1 kWh. The spiral R2 will also have a max. power 1 kWh. The thermostat T1 is set to the water temperature selected by the user. (Recommended temperature 39 ° C). Since the AC source is stable, the water in the boiler will be permanently heated to the selected temperature, and when this temperature is reached, the thermostat T1 interrupts the heating of the water by means of a coil R1. If the sun starts to shine on the photovoltaic panels, they will produce direct current and the wires R2 will heat up to heat the water to the temperature set on thermostat T2. (Recommended max. Temperature 75 ° C). By interrupting the supply of AC current to the coil of contactor ST when the set temperature is reached, the contactor contacts are opened and the DC current to the coil R2 is interrupted. The ST contactor used is designed by the manufacturer to switch DC current on and off, thus ensuring safe operation. In case of failure of thermostat function T1 and T2, there is a thermal fuse TP in the circuit, which interrupts the supply of AC current to the coil of the contactor ST and switches off the whole device.

Said device can work in combination, the user can arbitrarily set the temperature from the source of AC current using thermostat TI resp. in summer it can reduce the required heating to a minimum and fully utilize the power of the R2 spiral. whose current source is photovoltaic panels. The PV module source is ecologically absolutely clean and free of charge for the user, saving considerable funds after the initial investment has been paid. The estimated lifetime of the panels is min. 25 years. When purchasing a boiler with an AC and DC combined water heater installed, the boiler can only be connected to an AC power source and used as a conventional water heater without limitation. However, it can connect to photovoltaic panels at any time to exploit the energy potential of both power sources or to use only the DC power source from the PV panels and consume environmentally clean energy.

SK 5787

Industrial usability

Equipment for combined heating of water using AC and DC current allows the use of an alternative source of ecologically clean energy.

The very simple transmission of electricity from the PV modules (using a 2.5 mm cable) allows the system to be used without complicated construction work. Given the increasing performance of photovoltaic panels and their decreasing cost, it is an excellent prerequisite for the use of the equipment wherever electricity from the grid is used to heat water or gas is used for heating. The use of the device not only brings personal savings to the users, but also considerable social savings in terms of creating ecological resources.

Claims (1)

PROTECTION REQUIREMENTS Apparatus for combined heating of water by means of AC and DC current, characterized in that it consists of a terminal block (XI) to which a protective conductor (PE) is connected, which is further connected to the thermostat (T2) and thermostat (T1), (X2) a phase conductor (L) is supplied, which is further connected to the thermal fuse (TP) and via the break contact (Y1) of the thermal fuse (TP) is further connected to the thermostat (T2) and thermostat (T1); T2) continues through the break contact to the input (A1) of the contactor coil (ST), from the thermostat (T1) via the break contact the conductor (L) is connected to the coil (R1), the neutral (N) is connected to the terminal (X3) to which the thermal fuse (TP) is connected and via the break contact (Y2) of the thermal fuse (TP) it is connected to the input (A2) of the contactor coil (ST) and continues and connects to the coil (R1) into terminal block (X4) the DC current (L +) phase conductor is connected from where it is connected to the contactor (ST) to the input j of the NO contacts (1), connected to the coil (R2) via the output contacts of the NO contacts (6) of the contactor (ST); ), the output wire from the thermostat (T2) and the output wire from the contact (Y2) of the thermal fuse (TP) are connected to an LED (LED 1), the input conductors to the coil (R1) are connected to LED (LED 3); an LED (LED 2) is connected to the spiral input wires (R2).