RU160237U1 - TWO-CIRCUIT WALL GAS BOILER - Google Patents

Abstract

A boiler containing a fan, a main heat exchanger, a temperature control sensor, a gas burner, an electric igniter, a torch presence sensor, an electronic control unit, a heated water flow sensor for hot water supply, a gas valve, a secondary heat exchanger, a temperature control sensor, a heated water temperature sensor for hot water supply , pressure pipe of the heating water circuit, return pipe of the heating water circuit, supply pipe of the heating water circuit for hot water supply, return t ubu circuit for hot water supply, shutoff solenoid valves on the pressure and return pipes, shutoff solenoid valve in front of the secondary heat exchanger, heating water pressure sensor, fan operation sensor, automatic exhaust valve, safety valve, water pump, make-up pipe, check valve, make-up pump , a tank with make-up water, characterized in that the electric igniter is movable, there is a mechanism for automatically moving the electric igniter according to the signal from the unit electronic regulation in the center of ignition of the torch and withdrawal of the electric igniter from the combustion zone upon receipt of the flame.

Description

The utility model relates to the field of construction of devices for burning natural gas fuel in order to obtain thermal energy in the form of hot water for heating and water for hot water supply. The utility model can be used in industrial and civil engineering for heating and hot water supply, in autonomous mobile and stationary objects when generating thermal energy through the combustion of fuel natural gas.

A well-known boiler containing a fan, a main heat exchanger, a temperature control sensor, a gas burner, an electric igniter, a torch presence sensor, an electronic control unit, a heated water flow sensor for hot water supply, a gas valve, a heated water temperature sensor for hot water supply, shutoff solenoid valves, a pressure sensor heating water, fan operation sensor, automatic exhaust valve, safety valve, secondary heat exchanger, water pump, pressure pipe heating water circuit, heating water circuit return pipe, supplying heating water circuit pipe for hot water supply, domestic hot water circuit return pipe, make-up pipe, non-return valve, make-up pump, make-up water tank (Utility Model Patent RU No. 112361, IPC F24H January 10, 2012).

The disadvantages of the known device:

1. When the burner starts, the ignition of the fuel gas is delayed, since the arc discharge of the electric igniter spark is located at a distance from the burner to prevent ignition of the igniter electrical contacts during continuous flame burning, as a result of which part of the fuel gas is released when the burner is launched into the atmosphere that is not burned, that is the efficiency of burning fuel gas is reduced and there is a gas contamination of the air atmosphere during the start-up of the boiler.

2. When switching to burning fuel gas with a high calorific value, the flame volume increases and during continuous operation the igniter contacts burn out, as a result of which the electric igniter ceases to ignite the fuel gas and some of the gas is released into the atmosphere not burned, despite the fact that the shutdown emergency boiler system that shuts off the gas supply.

These shortcomings are eliminated in the claimed design, which is aimed at solving the problem of increasing the efficiency of the boiler, preventing gas contamination when starting the burner and preventing emergency situations associated with the destruction of the igniter electrical contacts.

This problem is solved by using a boiler containing a fan, a main heat exchanger, a temperature control sensor, a gas burner, an electric igniter, a torch presence sensor, an electronic control unit, a heated water flow sensor for hot water supply, a gas valve, a secondary heat exchanger, a temperature control sensor, a temperature sensor heated water for hot water supply, pressure pipe of the heating water circuit, return pipe of the heating water circuit, the supply pipe of the heated circuit hot water supply, hot water circuit return pipe, shut-off solenoid valves on the pressure and return heating pipes, shut-off solenoid valve in front of the secondary heat exchanger, heating water pressure sensor, fan operation sensor, automatic exhaust valve, safety valve, water pump, make-up pipe , check valve, make-up pump, make-up water tank, while the electric igniter is movable, there is a mechanism for automatically moving the electric on the signal from the electronic control unit to the center of ignition of the torch and the removal of the electric igniter from the combustion zone upon receipt of the flame.

The figure shows a drawing of the claimed design. Positions indicate the following elements and assemblies: 1 - fan, 2 - main heat exchanger, 3 - temperature control sensor, 4 - gas burner, 5 - electronic control unit, 6 - heated water flow sensor for hot water supply, 7 - gas valve, 8 - temperature sensor for heated water for hot water supply, 9 - shutoff solenoid valve, 10 - pressure sensor for heating water, 11 - fan operation sensor, 12 - automatic exhaust valve, 13 - safety valve, 14 - secondary heat exchanger, 15 - water pump, 16 - pressure pipe of the heating water circuit, 17 - return pipe of the heating water circuit, 18 - supply pipe of the heated water circuit for hot water supply, 19 - return pipe of the hot water circuit, 20 - make-up pipe, 21 - check valve, 22 - make-up pump , 23 - a tank with make-up water, 24 - an electric igniter, 25 - a torch presence sensor, 26 - a mechanism for moving an electric igniter.

In FIG. dotted lines indicate the electrical connection between the control unit of electronic regulation and control and measuring and actuating elements.

The boiler is located inside the heated building vertically on the wall.

The purpose and interaction of elements and nodes is as follows.

The fan 1 serves to supply air from the outside to the combustion zone and to remove combustion products from the combustion zone. Air is drawn in through the outer pipe of the coaxial chimney (not shown in the chimney). The removal of combustion products occurs through the inner pipe of the coaxial chimney.

The main heat exchanger 2 is used to transfer heat from the combustion of gas to the heating water circulating with the help of the pump 15. The main heat exchanger 2 is sealed and consists directly of the heat exchanger and the combustion chamber, in which the burner 4, the electric igniter 24, the flame detector 25 and the mechanism 26 are located to move the electric igniter. The control sensor 3 is used to determine the heating temperature of the circulating water and transmit a signal to the electronic control unit 5.

A gas burner 4 with an electric igniter 24 are used to supply fuel gas to the combustion zone and ignite the mixture of fuel gas with air during start-up.

The electronic control unit 5 is used to programmatically control the operation of the boiler based on signals from temperature and pressure sensors. The sensor 6 duct heated water for hot water is used to monitor the availability of the required water pressure to open the valve 9 and supply heating water to the secondary heat exchanger 14.

The temperature sensor 8 is used to monitor the temperature of the heated water for hot water supply. When the required temperature is reached by the signal from the sensor 8 transmitted to block 5, the valve 9 closes in front of the secondary heat exchanger 14.

Shutoff solenoid valves 9 are used to close or open the circulation circuits of the secondary heat exchanger and heating in accordance with the signal from the electronic control unit 5.

The pressure sensor of the heating water 10 is used to measure the pressure in the heating system developed by the circulating water pump 15.

The sensor operation of the fan 11 is designed to control the pressure in the combustion chamber. Automatic exhaust valve 12 is designed to remove air from the heating water. The safety valve 13 is used to turn off the water pump 15 when the pressure of the circulating heating water in the heating system is exceeded.

The secondary heat exchanger 14 is used to heat water for hot water supply. The water pump 15 circulates the water in the heating system. Pressure, supply and return pipes of the heating water and hot water supply circuits 16, 17, 18, 19 provide for the removal of heated water and the supply of cold water to the boiler for heating and hot water supply.

The feed pipe 20 is used to make up for water losses in the heating system. The non-return valve 21, the make-up pump 22, the make-up water tank 23 provide the functioning of the make-up in the heating system.

The mechanism of movement 26 of the electric igniter serves to supply the electrical contacts of the igniter 24 to the ignition zone of the gas-air mixture. The torch presence sensor 25 serves to generate an electrical signal about the presence of the torch and transmit it to the electronic control unit 5.

The inventive device operates as follows.

When the boiler is turned on with pipes 16 and 17 connected to the heating devices for supplying and returning heating water according to a signal from the electronic control unit 5, the fan 1 and the water pump 15 are turned on, one of the electromagnetic valves 9 on the heating water line or on the hot water supply line opens from the type of heat consumption.

Based on the electrical signal from the sensor 25, the electronic control unit 5 uses the actuator assembly 26 to supply the electrical contacts of the igniter 24 to the zone of the nozzle opening of the gas outlet from the burner 4 (the nozzle hole is not shown in Fig.). After supplying the electric igniter to the ignition zone by block 5, an electric signal is supplied to the electric igniter 24 to obtain an electric discharge. At the same time, with an insignificant time delay, an electrical signal is supplied to the actuator to open the gas valve 7.

When leaving the nozzle opening of the burner 4 the smallest amount of fuel gas in the presence of air, a combustible mixture is obtained, which immediately ignites, since the igniter electrical contacts and the direct spark discharge are located in the center of the gas-air mixture.

In the known device, the electrical contacts are located not in the center of ignition of the gas-air mixture, but on the side to prevent burning of the electrical contacts of the igniter due to the fact that the electric igniter is stationary. In the known device, the gas-air mixture begins to ignite only when the ignition front of the igniter electrical contacts is reached. In this case, part of the fuel gas in the mixture with air due to suction by the fan 1 is thrown out and there is a loss of fuel gas and the atmosphere is polluted.

Compared with the known device, in the proposed design, the motion of the non-ignited gas-air mixture due to suction by the fan 1 does not occur. Loss of fuel gas is not observed, air pollution does not occur and this achieves a positive effect.

After ignition of the gas-air mixture, a torch is formed, which is simultaneously detected by the torch presence sensor 25 and an electrical signal is supplied to the electronic control unit 5. Unit 5 generates an electric feedback signal, which is transmitted to the actuator assembly of the electric igniter movement mechanism 26 and the electric igniter is removed from the torch combustion zone and thereby a positive effect is achieved to prevent burning of the electrical contacts.

Due to the combustion of gas, heating water is heated in the main heat exchanger 2. The combustion products are emitted by the fan 1 through the inner pipe of the coaxial chimney (not shown in the chimney) to the outside of the heated building. At the same time, fan 1 through the external coaxial chimney pipe (not shown in FIG.) Draws in fresh air supplied to the combustion. Heated heating water under the pressure of the water pump 15 is supplied to the heating devices, after which it is returned back to the boiler.

When the hot water faucet is open, in accordance with the signal from the flow sensor 6, the shut-off solenoid valves 9 on the pipes 16 and 17 are closed and the valve 9 opens in front of the secondary heat exchanger 14. Water is heated for hot water supply.

When the flow of hot water is stopped by the sensor 6, an electric signal is generated that is transmitted to block 5, from which an electric signal is received to close the valve 9 in front of the secondary heat exchanger 14. Temperature control is quantitative, that is, by changing the flow of heating water through the heat exchanger 14.

When the required temperature for heating is reached, temperature sensor 3 gives a signal to block 5 to close the electric gas valve 7. When the flame goes out or when it opens, sensor 25 also gives a signal to block 5 to close valve 7. If there is no vacuum in the combustion zone, sensor 11 , which gives a signal to block 5 to close the electric gas valve 7.

Claims (1)

A boiler containing a fan, a main heat exchanger, a temperature control sensor, a gas burner, an electric igniter, a torch presence sensor, an electronic control unit, a heated water flow sensor for hot water supply, a gas valve, a secondary heat exchanger, a temperature control sensor, a heated water temperature sensor for hot water supply , pressure pipe of the heating water circuit, return pipe of the heating water circuit, supply pipe of the heating water circuit for hot water supply, return t ubu circuit for hot water supply, shutoff solenoid valves on the pressure and return pipes, shutoff solenoid valve in front of the secondary heat exchanger, heating water pressure sensor, fan operation sensor, automatic exhaust valve, safety valve, water pump, make-up pipe, check valve, make-up pump , a tank with make-up water, characterized in that the electric igniter is movable, there is a mechanism for automatically moving the electric igniter according to the signal from the unit electronic regulation in the center of ignition of the torch and withdrawal of the electric igniter from the combustion zone upon receipt of the flame.

Images