Voltage converter, actuator and gas burner

A technology for step-down converters and actuators, which is applied to gas fuel burners, burners, combustion methods, etc., can solve the problems of small airflow, rapid opening and closing of current valves, and can no longer be accurately controlled, and achieves high efficiency. Effect

Inactive Publication Date: 2018-10-23
BOSCH TERMOTECHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Buck converters can no longer be used at very low duty cycles close to 0% because the current valve cannot open and close infinitely fast
Therefore, very small airflows can no longer be accurately controlled

Method used

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  • Voltage converter, actuator and gas burner
  • Voltage converter, actuator and gas burner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] figure 1 A schematic diagram of the gas burner 100 is shown. Preferably, the gas burner 100 comprises a fan 105 for providing an air volume flow and a control device 110 for controlling the fan 105 . The control device 110 is provided in particular to control the rotational speed of the fan 105 . The volume flow provided by the fan 105 passes through the outlet opening 115 of the gas valve 120 so that the gas discharged from the outlet opening 115 can mix with the air volume flow and can be ignited to form a flame 125 . The flame 125 can be used in particular to heat a liquid, in particular water, for example by means of a heat exchanger. The gas burner 100 can be used in particular in a hot water installation, such as a water heater (Therme). The water heater can be set up to provide hot water in an apartment or house.

[0019] The gas valve 120 is connected with an actuator 130 to open or close the gas valve 120 . Actuator 130 includes a moving coil 135 (also ref...

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PUM

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Abstract

An electrical buck converter comprises a circuit input and a circuit output, wherein the circuit input and the circuit output have a common reference potential; a current valve having an input end andan output end, wherein the input end is connected to the circuit input end; a coil, which is connected between the output of the current valve and the circuit output; a diode, which is used in the forward direction from the reference potential to the output of the current valve; an output capacitor between the circuit output and the reference potential; a control device for periodically opening and closing the current valve. A Zener diode with a forward direction to the reference potential is inserted between the anode of the diode and the reference potential, and a resistor is provided parallel to the diode.

Description

technical field [0001] The invention relates to a technique for supplying electric current for controlling an actuator. The invention relates in particular to the control of an actuator provided for actuating a gas valve. Background technique [0002] A gas burner for heating water includes a fan and a gas valve for generating an air volume flow. The gas valve includes a moving coil and can be controlled proportionally between a closed and an open state in order to control the flow of combustible gas through the valve. Airflow through the gas valve is generally a function of the current flowing through the moving coil. [0003] Current controls for moving coils may include linear regulators which, while capable of adjusting the gas valve over a wide range, have relatively low efficiency here and generally generate so much electrical waste heat This necessitates a cooling body for dissipating this electrical waste heat. In a second embodiment, a clocked current regulator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156F23N1/00
CPCF23N1/005H02M3/156F23N1/025F24H9/2035F23N2235/14F23D14/00F24H9/00F24H9/0005F24H9/18H02M3/005H05B1/0283
Inventor J·奥利韦拉L·T·费雷拉
Owner BOSCH TERMOTECHA
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