JPS6238133Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion control device, and particularly provides a mechanism for centrally increasing and decreasing the amount of fuel and combustion air supplied to a burner in response to changes in load.

Hereinafter, an example of hot water heating using an oil-burning machine will be explained with reference to the figures. 1 is an oil-burning machine with a burner 3 disposed at the bottom of the combustion chamber 2, and a blower chamber with a fan 4 below the combustion chamber 2. A heat exchanger 6 heated by a burner 3 is connected to the upper part of the combustion chamber 2.
has been set up. 7 is a thermal circuit in which a pump 8, a radiator 9, and a temperature-mechanical conversion means 10 are connected in series with piping on the upstream side of the heat exchanger 6, and hot water is supplied from the pump 8 as a heat medium into this closed circuit. It is circulated to a heat exchanger 6, a temperature-mechanical conversion means 10, and a radiator 9.

Reference numeral 11 denotes a nozzle for supplying oil to the burner 3, which is connected to an oil tank 13 via an oil supply pump 12. 1
Reference numeral 4 denotes a dish-shaped damper that faces the air outlet 15 of the air chamber 5 from above and adjusts the opening degree by moving up and down, and is swingably attached to one end of a horizontal support shaft 16. ing. And this support shaft 16
The damper 14 is supported at its middle by a fulcrum 17, and seesawed by the force applied to the other end to move the damper 14.

A return passage 18 is connected in parallel to the oil supply pump 12, and is provided with a diaphragm type control valve 19 that adjusts the amount of return oil by moving it up and down.

Here, the temperature-mechanical conversion means 10 includes a diaphragm 20 that is displaced in response to pressure fluctuations as the hot water temperature in the thermal circuit 7 rises and falls; a secondary pressure spring 21; It consists of a vertical rod 22 that moves up and down with the same amount of displacement and up and down movement. The tip of the small rod 23 protruding horizontally from the center is attached to the support shaft 16.
It is connected to the other end like a link. Further, the temperature-mechanical conversion means 10 and the control valve 19 are connected to the rod 2.
2 are integrally connected by a hollow tube 24 that surrounds and covers the two, and the hollow tube 24 is cut out at a portion where the small rod 23 protrudes and moves up and down. and,
Outside the incision is a display scale 25 that indicates the amount of vertical movement of the rod 22, that is, the change in hot water temperature.
is provided, and the small rod 23 is commonly used as a guide.

Next, we will explain the operation of the device of this invention.
burner 3 by driving oil supply pump 12 and fan 4
is ignited and burned to heat the hot water in the heat exchanger 6. When the hot water temperature is low, the rod 22 does not move,
The control valve 19 and the damper 14 are in the fixed position, and this state is the full combustion state of the burner 3. Thus,
As the hot water temperature increases, the pressure in the thermal circuit 7 increases and the diaphragm 20 and rod 22 move upward. Note that the pump 8 in the thermal circuit 7 is also driven. The control valve 19 is pushed up by the rod 22 and opened further, increasing the amount of return oil and decreasing the amount of oil supplied to the nozzle 11. Also, the damper 14 is a small rod 23.
and is moved downward by the support shaft 16, and the air outlet 1
5 to reduce the amount of air for combustion by the fan 4. Therefore, since the burner 3 is supplied with air in an amount corresponding to the amount of oil supplied, complete combustion is achieved even if the calorific value decreases. As a result, the degree of rise in hot water temperature is suppressed, but the temperature will eventually rise to a predetermined temperature. On the other hand, thermal circuit 7
Since heat is being radiated, the hot water temperature decreases according to the load. At this time, the diaphragm 20 and the rod 22 move downward due to the decrease in hot water pressure due to the decrease in hot water temperature, and the calorific value of the burner 3 is increased so that the predetermined temperature is reached. The burner heat output is continuously and steplessly adjusted as the load changes. Since the damper 14 simultaneously adjusts the amount of air for each calorific value, the burner 3 burns completely.

In order to achieve complete combustion, the secondary pressure spring 21 and the position of the support point 17 on the support shaft 16 are adjusted in advance. Also, when the rod 22 whose lower end is connected to the diaphragm 20 moves up and down due to a pressure change due to a change in the temperature of the hot water in the thermal circuit 7, the small rod 23 moves up and down as a result of this movement. By checking the display scale 25, the temperature of the hot water flowing from the heat exchanger 6 to the radiator 9 can be checked.

The temperature-mechanical conversion means 10 may be of the type shown in FIG. 2, in which the diaphragm 20 and the rod 22 are pushed up by the expansion pressure of a thermal expansion liquid heated by hot water. Also, as shown in FIG. 3, the return passage 18 is omitted and the control valve 19 is connected directly to the nozzle 1.
1 and the oil supply pump 12, and this control valve 19
Alternatively, the amount of oil supplied may be reduced by pushing up the rod 22.

In addition, when the fuel is gas, the fuel pump 12 is omitted and a governor is inserted instead.

In this way, the combustion control device according to the present invention links the rod of the temperature-mechanical conversion means to the control valve and the damper, and simultaneously increases and decreases the amount of fuel and combustion air according to the temperature of the heat medium, so that the heat medium is not under load. When the temperature changes due to fluctuations, the rod can be moved mechanically, and the mechanical force can be used to centrally increase or decrease the fuel control valve and combustion air damper.Since it is a mechanical mechanism, it can be easily done, and since the temperature can be changed centrally, it is possible to increase or decrease the fuel control valve and the combustion air damper. can be easily and completely combusted. Further, the temperature-mechanical conversion means is provided in the thermal circuit between the heat exchanger and the radiator, and the rod of the temperature-mechanical conversion means moves due to a pressure change due to a temperature change of the heat medium flowing from the heat exchanger to the radiator. When this movement occurs, a small rod connected to the rod moves, and this small rod becomes a part of the member that links the temperature-mechanical conversion means and the damper, and also checks the temperature of the heat medium. By checking the correspondence between the temperature display scale provided near the small rod and this small rod, the temperature of the heat medium flowing from the heat exchanger to the radiator can be determined. The simple structure makes it easy to understand.

[Brief explanation of the drawing]

Figure 1 is a partial cross-sectional system diagram of the device of the present invention.
FIG. 2 is a sectional view of a main part of another embodiment, and FIG. 3 is also a system diagram of a main part of another embodiment. 3... Burner, 4... Fan, 6... Heat exchanger, 7... Heat circuit, 10... Temperature-mechanical conversion means, 11... Nozzle, 14... Damper, 16...
Support shaft, 19...control valve, 20...diaphragm,
21... Secondary pressure spring, 22... Rod,
23...Small rod, 25...Display scale.

Claims (1)

[Scope of utility model registration request] a heat circuit in which a circulation pump, a heat exchanger heated by a burner, and a radiator are connected in series in a circular manner and a heat medium flows therein; and a heat circuit provided in the heat circuit between the heat exchanger and the radiator, Temperature-mechanical conversion means that generates mechanical force due to a pressure change based on the temperature of the heat medium and has a rod that is displaced by the mechanical force, and a small rod that extends from the rod and is displaced based on the displacement of the rod. and a temperature display scale disposed near the small rod, a control valve for regulating fuel to the burner, and a movable damper for regulating combustion air to the burner, and a temperature display scale disposed near the small rod.
Combustion control characterized in that a rod of the mechanical conversion means is linked to the control valve, and the small rod is linked to the damper to simultaneously increase or decrease the amount of fuel and combustion air according to the temperature of the heat medium. Device.