Abstract:
A solenoid valve assembly for controlling gas supply and opening and closing gas supply with a regulation function generally includes a solenoid valve assembly having a housing, a diaphragm assembly, a first and second solenoid valves, a first and second valve bodies, a first and second terminals of positive and negative poles, a first and second wire winding assemblies, a first and second “E” type cores, a first and second “T” type cores, springs, and brackets of the first and second valves, wherein a small power is required for the opening and closing of diaphragms because of the adopted indirect opening capability of this valve.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   This invention is related to a method of controlling gas supply and opening and closing gas supply with a regulation function, and relates in particular to the small power consumption required for the opening and closing of a diaphragm because of the adopted indirect opening capability of this method. 
   2. Description of the Prior Art 
   Generally, there are two kinds of conventional gas heaters. One kind of conventional gas heater is operated by hand mechanically, and a gas burner is ignited by pressing or turning and holding a knob until the thermocouple or thermopile in the gas burner generates enough steady current to hold the plunger and keep the valve in open status. This operation for igniting the gas burner always requires the user to hold the knob for a certain period of time, which is inconvenient for the user. The other kind of conventional gas heater is operated by an electronic function. After pressing the “ON” button, the gas valve, igniter and sensor for recognizing the flame are operated automatically by a micro-processor or some logical circuit connections. But this kind of device, like the gas valve, consumes more power and requires AC power such as AC 110V or AC 240V, thereby creating higher costs and extra payments for installation, and requiring more parts to be designed for the products and to maintain them. 
   Therefore, it is an object of the present invention to provide a method for controlling the gas supply to a gas burner, which can obviate and mitigate the above-mentioned drawbacks. 
   SUMMARY OF THE INVENTION 
   This invention is related to a method for controlling gas supply and opening and closing gas supply with a regulation function, and relates in particular to the small power consumption required for the opening and closing of a diaphragm because of the adopted indirect opening capability of this method. 
   It is the primary object of the present invention to provide a method for controlling gas supply and the opening and closing of the main burner with a regulation function which operates with ultra-low power consumption by using a small capacity battery for a long time while still maintaining and automatically operating all functions, and to easily install the products required for this function and to reduce the cost of designing said products. 
   The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. 
   Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG.  1  and  FIG. 2  show perspective views to understand the structure and important parts for controlling gas supply according to the present invention. 
       FIG. 3  shows the stand-by condition to understand the working principle of the method for controlling gas supply and the opening and closing of the gas supply. 
       FIG. 4  shows the first step of the working principle of the method for controlling gas supply when the first solenoid valve is opened. 
       FIG. 5  shows the second step of working principle of the method for controlling gas supply when the first diaphragm is opened. 
       FIG. 6  shows the third step of the working principle of the method for controlling gas supply when the second solenoid valve is opened. 
       FIG. 7  shows the fourth step of the working principle of the method for controlling gas supply when the second diaphragm is opened. 
       FIG. 8  shows the fifth step of the working principle of the method for controlling gas supply when the stem with regulation diaphragm is opened by the servo motor assembly. 
       FIG. 9  shows the final step of the working principle of the method for opening and closing gas supply when the first solenoid and diaphragm is opened, the second solenoid and diaphragm is opened and the regulation diaphragm is opened by the servo motor assembly. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   For the purpose of promoting an understanding of the principles of this invention, reference will now be made to the embodiment illustrated in the drawings. Specific language will be used to describe same. It will nevertheless, be understood that no limitation of the scope of the invention is thereby intended. Such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated herein being contemplated as would normally occur to one skilled in the art to which the invention relates. 
     FIG. 1  shows the method for controlling gas supply by a servo motor, reduction gear box and gear with regulation function. 
     FIG. 2  shows the method for opening and closing gas supply with a regulation function. 
     FIG. 3  shows the stand-by condition to understand the working principle of this method for controlling gas supply and opening and closing the gas supply. 
   The solenoid valve assembly consists of valves S 10  and S 20 , solenoid valve bodies S 11  and S 21 , terminals of positive and negative poles S 12  and S 22 , wire winding assemblies S 13  and S 23 , “E” type cores S 140  and S 240 , “I” type cores S 141  and S 241 , springs S 15  and S 25 , and brackets S 16  and S 26  of the valves. The solenoid valve assembly is positioned in chamber CH 2  and the chamber CH 5 . The solenoid valve assembly normally closes in stand-by condition and seals up between chamber CH 2  and chamber CH 4  or chamber CH 5  and chamber CH 7 . 
   The diaphragm assembly comprises diaphragms D 10  and D 20 , springs D 11  and D 21  and diaphragm plates D 13  or D 23 . The diaphragm assembly is combined into the chamber CH 3  or chamber CH 6 . At stand-by condition, those diaphragms seal up to avoid the gas flowing from chamber CH 1  to chamber CH 4  or from chamber CH 4  to chamber CH 9  (the outlet), because the pressure is equalized between chamber CH 1  and chamber CH 3  or chamber CH 4  and chamber CH 6 . Additionally, the force of the springs D 12  and D 22  pushes the diaphragms D 13  and D 23  to close.
 
Force of spring  D   12 +pressure in chamber  CH   3 &gt;pressure in chamber  CH   1 
 
Force of spring  D   22 +pressure in chamber  CH   6 &gt;pressure in chamber  CH   4 
 
   The regulation assembly comprises of an adjust rotator R 1 , a spring R 2 , a diaphragm R 3 , a plate of a diaphragm R 4 , and a stem R 5 . At stand-by condition, the stem R 5  seals up between chamber CH 7  and chamber CH 8  to avoid gas flowing between the two chambers. At the same time, the adjust rotator R 1  is located at its highest position by the servo motor assembly. 
   The servo motor assembly consists of wire SM 1 , a servo motor SM 2 , speed reduction gear SM 3 , and a rotator SM 4 . 
     FIG. 4  shows the first step of the working principle of the concept for controlling gas supply when the first solenoid valve is opened. When the voltage is supplied to solenoid terminals S 12 , “E” type core S 140  and “I” type core S 141  each produce a magnetic field which come into contact with each other. When this occurs, the solenoid valve S 1  will open. At this moment, the gas flows through chamber CH 1 , chamber CH 2 , chamber CH 4  and the outlet of the pilot injector. 
     FIG. 5  shows the second step of the working principle of the method for controlling gas supply when the first diaphragm D 10  is opened. 
   In the  FIG. 4  condition, the pressure in the chamber CH 3  will be lowering, because the gas flowing through chamber CH 1  and chamber CH 4  have the effect of suctioning or reducing the pressure in chamber CH 3 . Additionally, the total diameter of chamber CH 1  is smaller then the total diameter of chamber CH 2  and chamber CH 3 . The effect of this smaller diameter of chamber  1  is that it helps to gain more suction pressure in chamber CH 3 , and therefore the diaphragm will no longer be balanced, and will open. Thus, 
    Force of spring  D   12 +pressure in chamber  CH   3 −suction pressure in chamber  CH   3 &lt;pressure in chamber  CH   1   
   At this moment, the pressure is equalized between chamber CH 4  and chamber CH 6 . Additionally, the force of the spring D 22  pushes the diaphragm D 23  to close. 
     FIG. 6  shows the third step of the working principle of the method for controlling gas supply when the second solenoid valve is opened. When the voltage is supplied to the solenoid terminal S 22 , “E” type core S 240  and “I” type core S 241  each produce a magnetic field which come into contact with each other. When this occurs, the solenoid valve S 2  will open. At this moment, the gas flows through chamber CH 4 , chamber CH 5 , chamber CH 7 , chamber CH 8  and the outlet of the main burner. 
     FIG. 7  shows the fourth step of the working principle of the method for controlling gas supply when the second diaphragm is opened. In the  FIG. 6  condition, the pressure in the chamber CH 6  will be lowering, because gas flowing through chamber CH 4  and chamber CH 5  have the effect of suctioning or reducing the pressure in chamber CH 6 . Additionally, the total diameter of chamber CH 4  is smaller than the total diameter of chamber CH 5  and chamber CH 6 , thereby gaining more suction pressure in chamber CH 6 . Therefore, the diaphragm will no longer be balanced, and will open. Thus, 
    Force of spring  D   22 +pressure in chamber  CH   6 −suction pressure in chamber  CH   6 &lt;pressure in chamber  CH   4   
     FIG. 8  is shown the fifth step of the working principle of the method for controlling gas supply when the stem R 5  with regulation diaphragm R 3  is opened more than  FIG. 7  by the servo motor assembly. 
   When the stem R 5  is forced down by the servo motor assembly, the suction pressure in chamber CH 6  will be increased, and therefore the diaphragm will open further and the volume of gas flowing will also be increased. The volume of gas flowing will controlled by the space of chamber CH 7  by the stem F 6  and the servo motor assembly. The process is as follows: 
   Control of the stem position (up/down)
         suction pressure in chamber CH 6  (decrease/increase)   position of diaphragm D 20  (more closing/more opening)   volume of gas flowing (less/more)       

     FIG. 9  shows the final step of the working principle of the method for opening and closing gas supply. When the first solenoid S 10  and diaphragm D 10  are opened, the second solenoid S 20  and the diaphragm D 20  are opened and the regulation diaphragm R 3  is kept open by adjusting the regulation. 
   The difference between the method of controlling the gas supply and opening and closing the gas supply is in the using an adjustor of regulation instead of the servo motor assembly to fix the regulation level. Also, the outlet pressure of the gas main can be changed by the position of the regulation adjustor. 
   It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above. 
   While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.