KR20000041752A - Method for controlling pump according to state of system in gas boiler - Google Patents

Abstract

The present invention automatically adjusts the speed of the circulating pump to control the heating circulation by automatically determining the difference between the fan rotation speed and the heating exit temperature and the heating return temperature of the gas boiler so that the heating of the gas boiler is achieved. The present invention is to provide a pump control method according to the system condition of the gas boiler to increase efficiency and to extend the life of the gas boiler and to improve the customer satisfaction.

Description

Pump control method according to system condition of gas boiler

The present invention relates to a method of controlling a pump according to a system condition of a gas boiler, and in particular, a speed of a circulating pump to automatically determine a difference between a fan rotation speed and a heating exit temperature and a heating return temperature of a gas boiler to control a heating circulation amount. The present invention relates to a pump control method according to the system condition of a gas boiler to increase the heating efficiency and to extend the life of the gas boiler to improve the customer satisfaction by automatically adjusting the gas boiler.

The speed of the circulating pump installed in the conventional gas boiler is manually controlled by the user and rotates at a constant speed all the time during operation. There is a problem of shortening the life of the gas boiler by giving pressure to the parts, and the user has to feel the temperature of the room directly, and the inconvenience of adjusting the speed of the circulating pump is difficult. There is always a problem that cannot be comfortably heated.

The present invention has been made in order to fundamentally cure the problems of the prior art as described above has the following objectives.

The present invention is to automatically determine the difference between the fan rotation speed and the heating exit temperature and the heating return temperature of the gas boiler to automatically adjust the speed of the circulating pump to control the heating circulation amount heating to achieve a comfortable heating of the gas boiler It is an object of the present invention to provide a pump control method according to the system condition of a gas boiler, which increases efficiency and extends the life of the gas boiler and improves customer satisfaction.

1 is a schematic configuration diagram showing an interior of a gas boiler;

2 is a flow chart for explaining the present invention.

<Description of the symbols for the main parts of the drawings>

1: gas boiler 10: combustor

12 gas burner 13 fan

14: primary heat exchanger 16: frame rod

17: exhaust 20: water tank

26: circulation pump 30: secondary heat exchanger

51,52: Electronic side 53: Proportional side

TH1, TH2: Dummyster FG: Fan Speed

VH: Rotational speed of circulation pump

The above object will be described in detail with reference to the accompanying drawings.

That is, Figure 1 shows a gas boiler (1) to which the method of the present invention is applied, which is installed in the casing (2) of the gas boiler (1) to combust the gas to heat the hot water for heating or hot water supply ( 10), the water tank 20 for storing the heating circulation water, and the secondary heat exchanger (30) having different paths for the circulation of hot and cold water are configured to combine with each other.

In this case, a burner group 12 including a plurality of burners is formed in the casing 11 of the combustor 10, and a primary heat exchanger 14 is installed in an upper direction thereof to prevent overheating and the water passing therethrough. The burner group 12 is heated, a fan 13 for supplying combustion air is installed on the bottom surface of the combustor casing 11, and a dummyster TH3 is installed in the vicinity of the transfer fan and the burner In the vicinity of the group 12, a spark coupler 15 for igniting the burner group 12 and a frame rod 16 for detecting ignition of the burner group are installed, and exhaust gas is provided on the upper surface of the combustor casing 11. An exhaust portion 17 for discharging is formed through the casing 2 of the gas boiler 1.

In addition, a gas pipe 50 for supplying gas is installed below the burner group 12, wherein two electron valves 51 and 52 for passing the gas at the time of energization and a proportional valve for adjusting the gas supply amount are provided. 53 is provided from the upstream of the gas pipe 50 with respect to the gas supply path.

The water tank 20 includes a high water level sensor 21 for detecting a high water level in the water tank, an overflow pipe 22 for discharging excess water, and a low water level sensor 32 for detecting a low water level in the pipeline. By recovering the heating water rotated on the bottom of the floor, circulation of water is provided to the heating return pipe 24 in which the water separator 23 is installed and the water supply pipe 25 supplying water to the primary heat exchanger 14. A circulation pump 26 for adjusting is provided in the downward direction.

On the other hand, in the secondary heat exchanger 30, the supply demister (TH1) and the dummy (TH2) to discharge the water through the tap water to detect the direct tapping temperature of the hot water supplied to the user discharge pipe 32, gas Direct oil supply with cold water from the outside of the boiler is installed, the water flow switch 33 for detecting the presence of water flow, and a mechanical automatic water quantity control device to obtain a stable temperature characteristic by passing a certain amount of water according to the direct water temperature. The entrance 34 and the water supply pipe 25 are connected to a heating hot water supply pipe 37 through which water for heating passes through the three-way valve 36.

In addition, between the heating return pipe 24 and the direct water inlet pipe 34 is provided with a tap water supply side 35 for replenishing water when the water tank 20 is insufficient, clogging of the heating filter, heating distributor The bypass pipe 38 is installed to prevent the pressure from rising inside the gas boiler and to circulate the flow of water by making the internal closed circuit of the gas boiler when the heating pipe is blocked.

In addition, the pump control method according to the system state of the gas boiler as shown in Figure 2 will be described.

When the operation of the gas boiler is started, detecting whether the rotation speed FG at which the fan 13 is driven is greater than a predetermined minimum rotation speed Arpm, and the rotation speed VH at which the circulation pump 26 is operated. ) Is proportional to supply gas to the gas burner 12 to perform normal combustion operation by the temperature difference Δt between the dummysters TH1 and TH2, and detecting whether or not is greater than the predetermined minimum rotational speed Krpm. The side 53 adjusts the amount of gas in proportion to the rotational speed of the fan, and measures the rotational speed FG of the fan to determine whether the rotational speed FG is within a predetermined rotational speed (Arpm≤FG <Brpm). When the circulation pump 26 operates at a low speed and is in the section (Brpm ≦ FG <Crpm), the heavy pump operation is performed. When the circulation pump 26 is in the section (Crpm ≦ FG <Drpm), the high speed operation is performed. When the low speed operation, the rotation speed (VH) of the pump is rotating within the predetermined set value rotation speed (Krpm≤VH <Lrpm) Check that the stable normal operation is made at low speed and the circulating pump operated at medium speed is rotating in the section (Lrpm≤VH <Mrpm). The setting section size of the rotation speed FG of the fan 13 in which stable normal operation is performed at a high speed by checking whether it is rotating within ≤VH <Nrpm is Arpm <Brpm <Crpm <Drpm and the rotation of the circulation pump 26. The number VH setting section size is Krpm &lt; Lrpm &lt; Mrpm &lt; Nrpm, and the rotation speed FG of the fan 13 is in a predetermined setting rotation speed (FG &lt; Arpm, FG &gt; If the rotational speed VH of the circulation pump 26 is within a predetermined set speed range (VH <Krpm, VH≥Nrpm), the microcomputer controlling the system determines that the circulation pump is idle and generates an error. To the user in the circulation in the gas boiler It made to consist of steps that display the different available.

In addition, in the error generation mode, if the rotational speed (VH) of the circulation pump is greater than or equal to the predetermined rotational speed (Nrpm), the microcomputer controlling the system determines that the idle rotation of the circulation pump is performed in the error generation mode, the circulation When the rotational speed VH of the pump is smaller than the predetermined minimum rotational speed Krpm, the microcomputer determines that the circulation pump does not rotate and performs the error generation mode.

In the present invention, when the operating system of the gas boiler is turned on and operation is started (S1) by detecting whether the rotation speed (FG) at which the fan 13 is driven (S2) is greater than a predetermined minimum rotation speed (Arpm). (S3) If the minimum rotation speed (Arpm) is greater than the pump operation (S4) If the rotation speed (Arpm) or less is to inform the user that the abnormal state in the error mode (S30).

The circulation pump 26 is operated (S4) detects whether the rotational speed (VH) is greater than the predetermined minimum value rotational speed (Krpm) (S5) if it is greater than the minimum rotational speed (Krpm), the dummyster (TH1, TH2) Proportional valve 53 for supplying gas to gas burner 12 to perform normal combustion operation (S6) by the temperature difference (Δt) between the control the amount of gas in proportion to the number of revolutions of the fan (S61) and the minimum rotation If the number (Krpm) or less, the microcomputer controlling the system determines that the circulation pump is non-rotating and indicates to the user that the abnormal state in the error mode (S30).

At this time, by measuring the rotational speed (FG) of the rotating fan (S7) to detect whether the rotational speed (FG) is within a predetermined number of revolutions (Arpm≤FG <Brpm) (S8) if the rotation within the section is When the pump 26 is in a low speed operation (S9) and rotates in the section, the pump 26 is in a low speed operation (S9) and detects whether it is in the section (Brpm ≦ FG <Crpm) (S10). When rotating in the pump 26 is the medium speed operation (S11) and detects whether it is in the section (Crpm≤FG <Drpm) (S12) When rotating in the section, the pump 26 is a high speed operation (S13) Is done.

In addition, when the circulation pump 26 operates at low speed (S9), it is checked whether the rotation speed VH of the pump is rotating within a predetermined set speed rotation range (Krpm≤VH <Lrpm) (S16). The pump is operated at a low speed (S17) and stable normal operation (S24), and when the circulation pump 26 is operated at medium speed (S11), the rotation speed VH of the pump is within a predetermined rotation speed range (Lrpm≤VH <Mrpm). If the pump is in the section (S18), the pump operates at a medium speed (S19) and performs a stable normal operation (S24). When the circulation pump 26 operates at high speed (S13), the rotation speed (VH) of the pump is Check whether it is rotating within a predetermined speed range (Mrpm≤VH <Nrpm) (S20) and if the pump is within the above speed (S21), the stable normal operation (S24) is made.

On the other hand, when the rotation speed FG of the fan 13 is equal to or greater than a predetermined set maximum rotation speed section FG≥Drpm (S14), the exhaust pipe is blocked (S15), and then the rotation speed VH of the pump 26 is Is in the set maximum rotational speed section (VH ≥ Nrpm) (S22), if within the section, the microcomputer determines that the circulation pump is idle and outputs the error generation mode (S30) to the user in the circulation in the gas boiler. You will be informed.

The rotation speed (FG) setting section size of the fan 13 is set by dividing by Arpm <Brpm <Crpm <Drpm, and the rotation speed (VH) setting section size of the pump 26 is divided by Krpm <Lrpm <Mrpm <Nrpm Is made to set.

As described above, the present invention rotates the circulation pump so that the heating circulation can be controlled by automatically determining the difference between the heating outlet temperature and the heating return temperature according to the fan rotation speed of the gas boiler, the rotation speed of the pump, and the heating set temperature. It is a very useful invention that can simultaneously achieve various effects such as increasing the heating efficiency to make the gas boiler pleasant heating by adjusting the speed automatically and extending the life of the gas boiler and improving customer satisfaction. It is obvious.

Claims (3)

Detecting whether the rotation speed FG at which the fan 13 is driven is greater than a predetermined minimum rotation speed Arpm when the operation of the gas boiler starts; Detecting whether the rotation speed VH at which the circulation pump 26 is operated is greater than a predetermined minimum rotation speed Krpm; Adjusting the amount of gas in proportion to the rotational speed of the fan by the proportional valve 53 supplying the gas to the gas burner 12 to perform normal combustion operation by the temperature difference Δt between the dummysters TH1 and TH2; The rotational speed FG of the fan is measured to detect whether the rotational speed FG is within a predetermined rotational speed (Arpm &lt; FG &lt; Brpm), and the circulation pump 26 is operated at low speed and the section (Brpm &lt; FG &lt; Medium speed operation if it is in C) and high speed operation if it is in said section (Crpm≤FG <D); When the circulation pump 26 operates at low speed, it is checked whether the rotational speed VH of the pump is rotating within a predetermined set speed range (Krpm≤VH <Lrpm) and stable steady operation is performed at a low speed. Stable normal operation is achieved by checking whether the circulation pump is rotating in the section (Lrpm≤VH <Mrpm) and stable normal operation is confirmed by checking whether the circulating pump that is operated at high speed is rotating in the section (Mrpm≤VH <Nrpm). The rotation speed (FG) setting section size of the fan 13 in which the operation is performed at high speed is Arpm <Brpm <Crpm <Drpm, and the rotation speed (VH) setting section size of the circulation pump 26 is Krpm <Lrpm <Mrpm <Nrpm The steps to be made, When the rotation speed FG of the fan 13 is within a predetermined set rotation speed (FG≤Krpm, VH≥Nrpm), an error generation mode is output to notify the user that there is an error in the circulation in the gas boiler. Pump control method according to the system state of the gas boiler, characterized in that consisting of. The method of claim 1, In the error generation mode, if the rotation speed (VH) of the circulation pump is greater than or equal to the predetermined rotation speed (Nrpm), the microcomputer controlling the system determines that the idle rotation of the circulation pump is performed in the error generation mode, characterized in that Pump control method according to the system condition of the gas boiler. The method of claim 1, In the error generating mode, if the rotational speed VH of the circulation pump is smaller than the predetermined minimum rotational speed Krpm, the microcomputer determines that the circulation pump does not rotate and performs the error generating mode. Pump control method according to the boiler system condition.