Patent Application
20140272738
1. Field of the Invention
The present invention relates to a burner igniting system for a gas stove, and more particularly to a burner igniting system for a gas stove including a simplified structure or configuration having fewer parts or elements for effectively igniting the burner of the gas stove and for preventing the burner igniting system from being easily damaged.
2. Description of the Prior Art
Typical igniting systems for igniting the burner of the gas stove comprise a spark generating circuit to produce sparks for igniting gas burners and a plurality of electrodes which are connected with the spark generating circuit for the ignition of the gas burners, a flame sensor circuit is operated in a first period for producing sparks, through of the electrodes, and in a second period and once the gas burner has been ignited, for sensing the presence of flame on each gas burner, and a reestablishing circuit, a current sensor circuit and control means are connected for generating first activation signals for the ignition of the burner, for monitoring the presence of flame on the burner and for emitting first sound signals to indicate that the burner has been ignited and, if no presence of flame is detected on the burner, for generating second activation signals for re-igniting the burner until that a maximum time for the ignition of the burner has been exceed.
For example, U.S. Pat. No. 6,280,180 to Fredin-Garcia-Jurado et al. discloses one of the typical igniting systems for igniting the burner of the gas stove and also comprising a spark generating circuit to produce sparks for igniting gas burners, and a flame sensor circuit and a current sensor circuit are further required to be provided for sensing or detecting the flame and the current respectively.
However, the typical igniting system includes a complicated structure or configuration that may include a complicated making or manufacturing procedure and that is required to be made or manufactured by specialized persons, and that may include a greatly increased manufacturing cost.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional burner igniting systems for gas stoves.
The primary objective of the present invention is to provide a burner igniting system for a gas stove including a simplified structure or configuration having fewer parts or elements for effectively igniting the burner of the gas stove and for preventing the burner igniting system from being easily damaged.
In accordance with one aspect of the invention, there is provided a burner igniting system comprising a base plate disposed in a gas stove, a burner disposed in the gas stove, a pilot light disposed on the base plate for supplying a flame to the burner, an igniting and sensing device disposed on the base plate for igniting the pilot light and for sensing a presence of flame on the pilot light, and a control device including a first processing device (MCU 1), a second processing device (MCU 2), at least one third processing device (MCU n), a high voltage circuit electrically connected the first and the second and the third processing devices (MCU 1-n) for being actuated and operated by the first and the second and the third processing devices (MCU 1-n), and the first and the second and the third processing devices (MCU 1-n) and the high voltage circuit being electrically connected to the igniting and sensing device for actuating the igniting and sensing device to selectively ignite the burner with the pilot light.
The control device includes a voltage sensing circuit electrically connected to the high voltage circuit for sensing a voltage in the control device. The control device includes a comparator electrically connected to the voltage sensing circuit and the high voltage circuit for sending a compared signal to the processing devices.
The control device includes an ignition detecting circuit electrically connected to the first and the second and the third processing devices (MCU 1-n) for detecting whether the burner has been ignited or not. The ignition detecting circuit may be selected from a trigger diode.
The control device includes a timer electrically connected to the high voltage circuit and the ignition detecting circuit and the first and the second and the third processing devices (MCU 1-n) for determining a time period that the burner has not been successfully ignited.
Further objectives and advantages of the present invention will become apparent from a careful reading of the detailed description provided hereinbelow, with appropriate reference to the accompanying drawings.
Referring to the drawings, and initially to
As shown in
The control circuit or device 3 further includes a voltage sensing circuit 35 electrically connected or coupled to the high voltage circuit 34 (
In operation, as shown in
For example, when the pilot light 21 and/or the burner 20 has been actuated or operated or ignited, the voltage sensing circuit 35 may sense or detect a high voltage signal or a low impedance; and may sense or detect a low voltage signal or a high impedance when the pilot light 21 and/or the burner 20 has not been actuated or operated or ignited, and the sensed or detected signals may be sent from the voltage sensing circuit 35 and/or the high voltage circuit 34 to the processing devices (MCU 1-n) 31-33 in order to determine or confirm that the pilot light 21 and/or the burner 20 has been successfully actuated or operated or ignited. The high voltage signal sensed or detected by the high voltage circuit 34 and/or the voltage sensing circuit 35 may be rectified and sent to a comparator 37 (
When the pilot light 21 and/or the burner 20 has not been actuated or operated or ignited, the sensed or detected signals may also be sent from the voltage sensing circuit 35 and/or the high voltage circuit 34 to the processing devices (MCU 1-n) 31-33 which may then actuate or operate the voltage sensing circuit 35 and/or the high voltage circuit 34 again in order to continuously actuate or operate the voltage sensing circuit 35 and/or the high voltage circuit 34 and to actuate or operate the igniting and sensing device 22 to selectively ignite the burner 20 with the pilot light 21.
A timer 40 is further provided and electrically connected or coupled to the high voltage circuit 34 and the ignition detecting circuit 36 and/or the processing devices (MCU 1-n) 31-33 for determining a time period that the pilot light 21 and/or the burner 20 has not been successfully actuated or operated or ignited; i.e., once the ignition detecting circuit 36 has determined that the pilot light 21 and/or the burner 20 has not been successfully actuated or operated or ignited, the timer 40 may start to count down and to determine a time period and may send the time period signal to the high voltage circuit 34 and/or the processing devices (MCU 1-n) 31-33 so as to actuate or operate the igniting and sensing device 22 to selectively ignite the burner 20 with the pilot light 21 again after the time period.
When the pilot light 21 and/or the burner 20 has not been successfully actuated or operated or ignited for several times, such as three times, four times, five times or the like, the processing devices (MCU 1-n) 31-33 may shut off the voltage sensing circuit 35 and/or the high voltage circuit 34 and/or the igniting and sensing device 22 in the process 41, and to determine that the igniting and sensing device 22 may not be successfully actuated or operated or ignited in the process 42, and will not actuate or operate the igniting and sensing device 22 again before the igniting and sensing device 22 is checked and repaired by the users. Again, it is to be noted that only the igniting and sensing device 22 is required to be provided for both igniting the pilot light 21 and sensing the presence of flame on the pilot light 21, and the igniting and sensing device 22 may be controlled or actuated or operated by the processing devices (MCU 1-n) 31-33 and/or the high voltage circuit 34 and/or the voltage sensing circuit 35.
Accordingly, the burner igniting system in accordance with the present invention for the gas stove includes a simplified structure or configuration having fewer parts or elements for effectively igniting the burner of the gas stove and for preventing the burner igniting system from being easily damaged.
Although this invention has been described with a certain degree of particularity, it is to be understood that the present disclosure has been made by way of example only and that numerous changes in the detailed construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.
