The gas quantity of gas heater and rotation speed of fan synchronizing controls
Technical field
The present invention relates to gas heater, particularly a kind of gas quantity of gas heater and rotation speed of fan synchronizing controls are applicable to aqueous vapor coordinated type gas heater.
Background technology
Existing gas heater for promoting its thermal efficiency under different thermic loads, adopts the frame mode of gas quantity and rotation speed of fan adjusted in concert usually, but present this adjusted in concert frame mode generally all adopts proportioning valve to regulate, and cost is higher; And for the gas heater of aqueous vapor coordinated type because its structural reason, still do not realize the function of gas quantity and rotation speed of fan adjusted in concert.
Summary of the invention
The objective of the invention is to overcome the deficiency of present technology and a kind of low cost is provided, is applicable to the gas quantity and the rotation speed of fan synchronizing controls of aqueous vapor coordinated type gas heater.
The technical scheme that realizes the object of the invention is: the gas quantity of gas heater and rotation speed of fan synchronizing controls, comprise aqueous vapor interstage valve, link gear, potentiometer, controller and speed-changing draught fan, it is characterized in that, described link gear is arranged between the air valve stem and potentiometer rotating shaft of aqueous vapor interstage valve, described potentiometer is connected with the input of controller by lead, and the output of controller is connected with speed-changing draught fan by lead.
Above-mentioned link gear comprises first gear that is fixed on the aqueous vapor interstage valve air valve stem and second gear that is fixed in the potentiometer rotating shaft, and described first gear and second gear are meshing with each other.
Installation for convenient above-mentioned link gear is fixed with fixed head on described aqueous vapor interstage valve air valve body,
The described potentiometer and second gear are separately fixed on the tow sides of fixed head, and potentiometer is connected with second gear is coaxial.
The present invention compared with prior art, its beneficial effect is, when can regulate gas quantity by the air valve stem of rotation aqueous vapor interstage valve, make between the air valve stem of aqueous vapor interstage valve and the potentiometer rotating shaft by link gear and to link, the resistance value of synchronous change potentiometer changes the voltage that passes through, controller provides corresponding input voltage according to the variable signal of voltage to speed-changing draught fan, finally controls the rotating speed and the air quantity of speed-changing draught fan, reaches the adjusted in concert of gas quantity and rotation speed of fan; The present invention also has simple in structure, the advantage that cost is low.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a circuit diagram of the present invention.
The specific embodiment
The present invention is described further below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the present invention includes aqueous vapor interstage valve 1, fixed head 2, first gear 3, second gear 4, potentiometer 5, connect lead 6, controller 7, connect lead 8 and speed-changing draught fan 9, wherein fixed head 2 is installed on the air valve body 11 of aqueous vapor interstage valve 1, it is characterized in that described potentiometer 5 is connected with the input of controller 7 by connecting lead 6, the output of controller 7 is connected with speed-changing draught fan 9 by connecting lead 8, and physical circuit is seen Fig. 2; The potentiometer 5 and second gear 4 are separately fixed on the tow sides of fixed head 2, and potentiometer 5 and 4 coaxial connections of second gear, and 111 coaxial connections of air valve stem of first gear 3 and aqueous vapor interstage valve 1, first gear 3 and second gear 4 are connected with a joggle.
When the present invention uses, when the user need regulate the firepower size, promptly regulate the anglec of rotation of described air valve stem 111, at this moment air valve stem 111 drives 3 rotations of first gear, first gear 3 drives 4 rotations of second gear, second gear, the 4 final potentiometers 5 that drive rotate, thereby, potentiometer 5 rotations change the voltage that passes through because of having changed resistance value, controller 7 provides corresponding input voltage according to the variable signal of voltage to speed-changing draught fan 9, finally control the rotating speed and the air quantity of speed-changing draught fan 9, realize the adjusted in concert of gas quantity and rotation speed of fan at last.