KR20000046672A - Method for controlling combustion in heating operation by using temperatures of discharging heating water and returning heating water in gas boiler - Google Patents

Abstract

PURPOSE: A method for controlling combustion in heating operation by using temperatures of discharging heating water and returning heating water in gas boiler is provided to rapidly determine a heat quantity(Qd) required to combust for heating by using the temperatures(Tout, Tin) obtained from a thermistor 1 mounted in a line for discharging heating water and a thermistor 2 mounted in a line for returning heating water and a user's set temperature(Tset). Also, the method is provided to control the heating combustion by calculating a rotating speed(.phi.M) of an exhaust fan from the heat quantity(Qd) and calculating an electric current value(PmA) for regulating a gas proportion valve for controlling a quantity of combustion gas after detecting the rotating speed(.phi.M). CONSTITUTION: A method for controlling combustion in heating operation by using temperatures of discharging heating water and returning heating water in gas boiler comprises the following steps: a step for detecting a low water level, a short, thermistors(TH1, TH2), and a state of a remote controller; a step for detecting whether a user uses hot water or not; a step for receiving a user's set temperature(Tset), a temperature of discharging heating water(Tout), and a temperature of returning heating water(Tin) by a microcomputer; a step for detecting whether the user s set temperature(Tset) is within a temperature range used in normal heating operation or not; a step for performing forcible combustion for a predetermined time period(Asec) in response to a control to an open/close degree of the gas proportion valve set previously and input and simultaneously calculating overall heat quantity required in heating; a step for calculating a rotating frequency of an exhaust fan from the calculated overall heat quantity and operating the exhaust fan; a step for detecting an error state to determine operating condition of the exhaust fan; a step for calculating an electric current value for controlling the proportion valve; a step for maintaining a proportional combustion; a step for calculating a temperature difference(.delta.T) between the temperature of discharging heating water(Tout) and the temperature of returning heating water(Tin) and then performing a control to the equilibrium of the temperature difference; a step for extinguishing the combustion according to the conditions of the temperature difference(.delta.T), a temperature difference(.delta.T1) between the user's set temperature(Tset) and the temperature of discharging heating water(Tout), and a temperature difference(.delta.T2) between the user's set temperature(Tset) and the temperature of returning heating water(Tin); a step for igniting again and then starting to combust according to the conditions of the temperature difference(.delta.T), a temperature difference(.delta.T1) between the user's set temperature(Tset) and the temperature of discharging heating water(Tout), and a temperature difference(.delta.T2) between the user's set temperature(Tset) and the temperature of returning heating water(Tin); a step for subsequently repeating a step for counting the re-combustion and performing the forcible combustion for a time period set previously; and a step for stopping the control to the combustion, if the count value reaches to a predetermined times.

Description

Combustion control method during heating operation using temperature of hot water and heating return of gas boiler

The present invention relates to a method of controlling combustion during the heating operation by using the temperature of the hot water and the heating return water of the gas boiler, and more specifically, the thermistor 1 mounted on the heating water supply line and the thermistor mounted on the heating return line. Using the temperature (Tout, Tin) and user set temperature (Tset) obtained from 2, the heat quantity (Qd) required for heating combustion is quickly determined, and the rotation speed (ΦM) of the exhaust fan is calculated using the heat quantity. The present invention relates to a method of controlling heating combustion by calculating a gas proportional valve 53 control current value PmA for controlling a combustion gas amount by sensing a speed ΦM.

In general, the gas boiler system uses only one thermistor to measure the temperature of the circulating water on the heating tapping or heating return side and adjusts the amount of gas required for combustion using the temperature (Tset) set by the user.

In the conventional heating operation, the combustion control method measures the temperature of the circulating water by using one thermistor, so that the measured temperature of the circulating water is different from the temperature that the user wants to control.

Also in the conventional method of calculating the calorific value in order to control the amount of gas, the relationship with the user set temperature Tset is calculated using one thermistor. Therefore, there is a problem that control of the heating temperature is not quick by using the data obtained from one side of the temperature on the heating tapping side or the heating returning side.

The present invention has been made to solve the problems of the prior art operating as described above, the main object of the present invention is the user set temperature (Tset) and heating tapping side temperature (Tout) and heating from thermistor 1 and thermistor 2 It is to provide a method of controlling the heating combustion amount by obtaining the total heat quantity (Qd) of the gas consumption using the return side temperature (Tin), and using the calculated total heat quantity to obtain the rotation speed of the exhaust fan and the current value of the gas flow valve. .

1 is an overall system configuration diagram showing a gas boiler to which the control method of the present invention is applied;

Figure 2a, 2b is a flow chart illustrating a method of combustion control during heating operation using the temperature of the hot water and heating return water of the present invention,

Figure 3 is a graph showing the temperature of the detected pipeline circulation water of the thermistor against the time of heating combustion of the present invention,

4 is a graph for calculating the rotational speed of the exhaust fan using the amount of heat required for heating and burning of the present invention;

5 is a graph for obtaining a current value for controlling the gas proportional valve using the rotational speed value of the exhaust fan during heating and combustion of the present invention.

<Explanation of symbols for main parts of drawing>

TH1, TH2: Thermistor 36: Three-way valve 20: Water tank

32: low level detection sensor 22: water separator 53: gas proportional valve

26: circulation pump

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be more apparent from the following detailed description based on the accompanying drawings in order to achieve the above object.

That is, the present invention, as shown in the accompanying drawings 1 to 4, in a preferred embodiment of the combustion control method during the heating operation of the gas boiler of the present invention, the power is turned on to detect the low water level and ground fault and At the same time detecting the state of thermistor (TH1, TH2) and the remote control, if the detection state is detected good, detecting that the water flow switch is turned on to detect whether the user is currently using hot water, the water flow switch is When the off is detected, the microcomputer controlling the gas boiler system receives a user set temperature (Tset), a heating tapping temperature (Tout), and a heating return temperature (Tin), respectively, and receives the input user setting temperature (Tset). Detecting whether the temperature is within a range of temperature normally used for heating operation, and according to a control of a preset and input gas proportional valve opening / closing amount (Asec) Calculating a total heat quantity Qd necessary for heating while simultaneously performing forced combustion, and driving an exhaust fan by calculating a rotation speed of an exhaust fan (not shown) from the calculated total heat quantity Qd; Comparing the exhaust fan rotation speed with a predetermined rotation speed Z for a predetermined time (Bsec) to determine an operation state of the exhaust fan, and detecting an error state when the operation of the exhaust fan is normal; Calculating a current value for controlling the proportional valve from the rotational speed of the controller; maintaining proportional combustion by controlling the proportional valve using the proportional valve current value; ) And calculating the difference between the heating return side temperature Tin (| Tout-Tin | = ㅿ T) to perform temperature difference balance control, wherein the temperature difference ㅿ T is between a predetermined temperature value (C ℃, D ℃). Set temperature (Tse difference between t) and tapping temperature (Tout) (△ T ₁ ) Is between different predetermined temperature values (E ℃, F ℃) or the difference between user set temperature (Tset) and return temperature (Tin) (△ T ₂ Is determined to be between the other predetermined temperature values (G ℃, H ℃) for a predetermined time (Isec) and extinguishing if this condition is satisfied, the temperature difference (ㅿ T) is a predetermined temperature value (J ℃, K Difference between user set temperature (Tset) and tapping temperature (Tout) (△) T ₁ ) Is between different predetermined temperature values (L ℃, M ℃) or the difference between user set temperature (Tset) and return temperature (Tin) (△ T ₂ Is determined to be between another predetermined temperature value (N ° C., O ° C.) for a predetermined time (Psec), and if the condition is satisfied, re-ignition and counting the re-burning and forcing during the predetermined time (Qsec). Configured to sequentially perform the steps of performing combustion.

In the case of detecting the low water level and ground fault and detecting the state of thermistors (TH1, TH2) and the remote controller, if there is an error in only one of the two thermistors, emergency operation is performed and both thermistors are abnormal. If there is an error mode, the two thermistors are not abnormal in the first stage of detecting the low water level and ground fault and at the same time detecting the states of thermistors TH1 and TH2. If present, it is configured to perform emergency operation.

In the step of detecting whether the input user set temperature (Tset) is within a range of normally used temperature, the range of normally used temperature is composed of 35 ° C. to 85 ° C., and the microcomputer sets the user set temperature to If it recognizes below 35 ° C. for a predetermined time (Rsec), it keeps warm operation. If the micom recognizes the user set temperature to 85 ° C. or more for a predetermined time (Ssec), it performs rapid operation. If the user set temperature is recognized to be set outside the 35 ℃ ~ 85 ℃ for a predetermined time (Tsec) is made to perform an emergency operation.

In addition, in the fifth step of performing forced combustion for a predetermined time (Asec) under the control of the preset gas proportional valve opening / closing amount, the predetermined time (Asec) is for circulating water to circulate the heating pipe of the gas boiler. It consists of the time taken.

In the step of calculating the total amount of heat (Qd) required for heating, the heat amount (Qmax) at the maximum hot water combustion and the heat amount (Qmin) at the minimum hot water combustion of the heating operation, the heat quantity (Qdmax) at the maximum heating combustion, the minimum heating combustion Calculate calories (Qdmin), calorie burned by heating (Qpa) and calorie burned by hot water (Qpb), and the limit of calories is Q calorie at maximum hot water (Qmax) (Qdmax)〉 Forced burning calories (Qpb)〉 Forcing burning calories (Qpa)〉 Heating calories (Qdmin)〉 At minimum hot water combustion〉 Qmin (min)

The difference between the user set temperature (Tset) and the tapping temperature (Tout) while the temperature difference (T) is between predetermined temperature values (C ° C, D ° C) T ₁ ) Is between different predetermined temperature values (E ℃, F ℃) or the difference between user set temperature (Tset) and return temperature (Tin) (△ T ₂ In the eleventh step of extinguishing if the condition is satisfied by determining whether the temperature is between another predetermined temperature value (G ℃, H ℃) for a predetermined time (Isec), the predetermined temperature values are C ℃ <D ℃ <E ℃. <F ° C <G ° C <H ° C.,

The difference between the user set temperature (Tset) and the tapping temperature (Tout) while the temperature difference (T) is between predetermined temperature values (J ° C, K ° C) T ₁ ) Is between different predetermined temperature values (L ℃, M ℃) or the difference between user set temperature (Tset) and return temperature (Tin) (△ T ₂ ) Is judged for another predetermined temperature (Psec) for a predetermined time (Psec), and re-ignitions when the condition is satisfied, wherein the predetermined temperature values are defined as P <C <K ℃ <L ℃ < It is configured to be set to M ° C. &lt; N ° C. &lt;

The present invention may be variously valved and may take many forms and the following detailed description of the invention has been described only with respect to specific embodiments thereof. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the following description, but rather includes all valve-types, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims. It should be understood that.

Referring to the operation of the present invention configured as described above are as follows.

Figure 1 shows a gas boiler (1) to which the control method of the present invention is applied, which is installed in a casing (2) of the gas boiler (1) to burn a gas to heat hot water for heating or hot water supply (10). ), A water tank 20 for storing heating circulation water, and a secondary heat exchanger 30 having different paths for circulation of hot water and cold water.

At this time, 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 the upper direction thereof to prevent overheating and the water passing therethrough. The burner group 12 is heated, and a blower 13 for supplying combustion air is installed at the bottom of the combustor casing 11, and the burner group 12 is provided near the burner group 12. The spark coupler 15 for ignition and the frame rod 16 for detecting the ignition of the burner group are installed, and an exhaust unit 18 for discharging the exhaust gas is provided on the upper surface of the combustor casing 11. It is formed through the casing 2 of 1).

In addition, a gas pipe 50 for supplying gas is installed below the burner group 12, wherein two solenoid valves 51 and 52 for passing gas when energizing are provided and a proportion for adjusting the gas supply amount. The valve 53 is provided upstream of the gas pipe 50 with respect to the gas supply path.

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

On the other hand, in the secondary heat exchanger 30, thermistor 1 (TH1) for detecting the direct heating and tapping side temperature of hot water supplied to the user by discharging water through tap water and thermistor 2 (TH2) for detecting the heating return side temperature. The hot water discharge tube 31 is attached, the cold water from the outside of the gas boiler flows into the water flow switch 33 for detecting the presence or absence of water flow and a certain amount according to the direct water temperature to obtain a stable temperature characteristics The direct inflow pipe 34 and the water supply pipe 25 in which the mechanical automatic quantity control device is installed are connected to the heating hot water supply pipe 37 through which the 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 valve 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 1 and to circulate the flow of water by making an internal closed circuit of the gas boiler 1 when the heating pipe is blocked. The low temperature sensing thermistor TH3 is formed in the casing 2 of the gas boiler 1.

Figure 2a and 2b is a flow chart showing a method of combustion control during heating operation using the temperature of the hot water and heating return water of the present invention.

In a preferred embodiment of the present invention, when power is applied to the gas boiler (S10), the state of the system is first determined. That is, when the low water level detection sensor located in the water separator detects the low water level (S12), when the low water level is detected, the commissioning switch is turned on (S24) and the water receiver valve is turned on (S26) to perform water replenishment to the water tank. Then, the state of the ground detection is detected (S14) to detect whether a short state occurs in the system. At the same time, the connection between the thermistor 1 mounted on the heating tapping side, the thermistor 2 mounted on the heating return side, and the remote controller is detected (S16, S18, S20). Here, if there is an error in thermistor 1 or thermistor 2, it is processed in error mode and emergency operation is performed even if only one of the thermistors is abnormal (S50). In addition, there is no problem in the thermistor, but if there is no problem in the connection state of the remote control, emergency operation is performed (S50).

Then, the flow switch (FLS) is turned off and detected by the MICOM controlling the system of the gas boiler (S34) to set the three-way valve 36 to the heating side (S35), using the response signal The operation of the three-way valve 36 is confirmed (S37).

If there is no abnormality in the operation of the three-way valve 36, the microcomputer receives the user-set temperature (Tset) from the remote control, and the heating tap water from the thermistor 1 mounted on the heating tapping side and the thermistor 2 mounted on the heating returning side. The heating return temperature is input (S38).

It is determined whether the input user set temperature Tset is within a range of a temperature normally used for heating operation. That is, if the temperature below the minimum value is detected for a predetermined time (R) (S40) to perform the warm-up operation (S42), if the value above the maximum value of the set temperature is detected for a predetermined time (S) (S44) to perform a rapid operation If the user set temperature (Tset) is detected for a predetermined time (T) in the category of the set temperature (S48), the microcomputer recognizes that the connection state of the remote controller is abnormal and performs emergency operation (S50).

When performing the initial heating combustion, disturbance occurs in the temperature of the heating tapping side and the heating return side, making it difficult to control the temperature. Therefore, since it is impossible to control the combustion amount by sensing the temperature of the circulating water, forced combustion is performed by controlling the gas proportional valve according to a current value input in advance for a predetermined time (Asec) (S52).

In a preferred embodiment of the present invention, Figure 3 shows a graph showing the temperature of the detected circulating water of the thermistor against the heating and burning time of the present invention, it is normal to enter the normal temperature difference (ΔT) control section after the disturbance In order to control the heating combustion, the total heat quantity Qd required for the heating operation is obtained (S54). The total calorific value (Qd, Kcal / min) is calculated by the proportional component (Pd, Kcal / min) + integral component (Id, Kcal / min), the proportional component is defined as in Equation 1.

Pd = p × (Tset-Tout)

Here, p is a proportional constant, which is an integer read from a ROM in a microcomputer, Tset means a temperature set by a user, and Tout means a heating tapping temperature.

In addition, the integral component (Id) is defined as in Equation 2 below.

Id = I _n-1 + {i × (Tset-Tout)}

Where i is an integral constant equal to p, I _n-1 Is the value of Id obtained at.

The heating tapping temperature (Tout) used in Equations 1 and 2 may be replaced by the heating return temperature (Tin), and in some cases, is replaced by the difference between the heating tapping temperature and the heating return temperature (ΔT). Can be used. The calorific value is calculated using a heating tapping temperature and a heating return temperature input from the thermistor 1 (TH1) and thermistor 2 (TH2) every 100 msec from the microcomputer.

The calorie value calculated as described above is necessary to calculate the rotation speed of the exhaust fan (S54).

Figure 4 shows a graph for obtaining the rotational speed of the exhaust fan by using the heat amount required for heating combustion of the present invention.

As shown in FIG. 4, the indication value for calculating the exhaust fan rotation speed on the y-axis can be found based on the heat amount displayed on the x-axis. That is, the exhaust fan rotational speed indicating value? Q is valved in proportion to the slope A value of the graph, and its minimum value indicates the minimum exhaust fan revolutionary? Min. This is expressed as in Equation 3 below.

ΦQ = A × Q + Φmin

Where Q denotes the rotational speed indicating value of the exhaust fan, A is the slope of the graph, and? Min is defined as the minimum value of the exhaust fan rotational speed, respectively.

The rotation speed of the exhaust fan is controlled using the indication value of the rotation speed thus obtained (S60). Then, it is determined whether the preset rotational speed ZHz is maintained for a predetermined time (Bsec), and if it is not maintained (S62), it is processed as an error mode (S35).

5 is a graph for obtaining a current value for controlling the gas proportional valve using the rotational speed of the exhaust fan during heating and combustion of the present invention.

The current value of the y-axis is obtained based on the rotational speed of the exhaust fan on the x-axis (S64). Arithmetic equations for this are also shown in Equation 4.

P (mA) = A × ΦQ + Pmin

Here,? Q represents the rotation speed indicating value (Hz) of the exhaust fan, A is the slope of the graph, and Pmin is defined as the current minimum value (mA) for controlling the gas proportional valve during the combustion operation.

In addition, the gas proportional valve is opened and closed according to the control of the current value, and the complete proportional control is performed by adjusting the combustion amount (S66).

Thus, by detecting that the heating tapping temperature (Tout) is maintained for a predetermined time (qsec) that is greater than or equal to the predetermined value of the user-set temperature (Tset) by subtracting the temperature (U ° C) (S68). T) Determine the start of equilibrium detection. Then, the temperature difference balance control is performed while calculating the temperature difference (| heating hot water temperature-heating return temperature |).

In a preferred embodiment of the present invention, the temperature difference ΔT is 2 to 3 ° C., and the difference between the user set temperature Tset and the heating tapping temperature Tout Δ T ₁ ) Is 15 to 16 ℃ and the difference between user set temperature (Tset) and heating return temperature (Tin) (△ T ₂ Is maintained at a predetermined time (Isec) (S72) to extinguish the system (S74).

Then, it is again detected that the heating and tapping temperature Tout is maintained for a predetermined time (psec) by subtracting the temperature of the predetermined value (V ° C) of the user set temperature (Tset) to determine whether to reburn ( S76). In another preferred embodiment of the present invention, the temperature difference ΔT is between 2 and 3 ° C., and the difference between the user set temperature Tset and the heating tapping temperature Tout is Δ. T ₁ ) Is 8 to 9 ℃ and the difference between user set temperature (Tset) and heating return temperature (Tin) (△ T ₂ Is maintained at a predetermined time (Psec) (S78), the system is re-burned (S80).

Then, after counting the reburn, the process of forcibly burning for the predetermined time (Qsec) is repeatedly performed.

In a preferred embodiment of the present invention, the maximum number of times of the count is 15, and when the maximum number of times is performed, the water flow switch is turned off (S82) and the combustion control ends.

According to the present invention as described above by detecting the heating tap temperature (Tout) and heating return temperature (Tin) by using the two thermistors (TH1, TH2) to obtain more accurate temperature data of the circulating circulating water, based on this data Accurate combustion control can be achieved.

In addition, it is obvious that the invention is a very advantageous invention having the effect of saving energy by preventing unnecessary gas consumption by performing a complete proportion of combustion control.

Claims (11)

In the method of controlling the combustion for the heating operation of the gas boiler, A first step of detecting a low water level and a ground fault while detecting the state of the thermistors TH1 and TH2 and the remote controller; A second step of detecting whether the user is using hot water by detecting that the water flow switch is turned on if the detection state is detected to be good; A third step of receiving, by the microcomputer controlling the gas boiler system, a user set temperature Tset, a heating tapping temperature Tout, and a heating return temperature Tin when the water flow switch is turned off; A fourth step of detecting whether it is within a range of a temperature normally used for heating operation to determine the input user set temperature Tset; A fifth step of performing a forced combustion for a predetermined time (Asec) and calculating a total heat amount required for heating according to a control of a preset gas proportional valve opening / closing amount; A sixth step of driving the exhaust fan by calculating the rotation speed of the exhaust fan from the calculated total heat amount; A seventh step of detecting an error state by comparing the exhaust fan rotation speed with a predetermined rotation speed (ZHz) for a predetermined time (Bsec) to determine an operation state of the exhaust fan; An eighth step of calculating a current value for controlling the proportional valve from the rotation speed of the exhaust fan when it is determined that the operation of the exhaust fan is normal; A ninth step of maintaining proportional combustion by controlling the proportional valve using the proportional valve current value; A tenth step of performing a temperature difference balance control by calculating a difference ΔT between the heating tapping side temperature Tout and the heating return side temperature Tin as (ΔT = | Tout-Tin |) according to the result of the proportional combustion; step; The difference between the user set temperature (Tset) and the tapping temperature (Tout) while the temperature difference (T) is between predetermined temperature values (C ° C, D ° C) T ₁ ) Is between different predetermined temperature values (E ℃, F ℃) or the difference between user set temperature (Tset) and return temperature (Tin) (△ T ₂ (11) judging whether or not) is between the other predetermined temperature values (G ° C., H ° C.) for a predetermined time, and extinguishing combustion when this condition is satisfied; The difference between the user set temperature (Tset) and the tapping temperature (Tout) while the temperature difference (T) is between predetermined temperature values (J ° C, K ° C) T ₁ ) Is between different predetermined temperature values (L ℃, M ℃) or the difference between user set temperature (Tset) and return temperature (Tin) (△ T ₂ (12) judging whether or not is between yet another predetermined temperature value (N ° C., O ° C.) for a set time, and re-igniting to start combustion when this condition is satisfied; A fourteenth step of sequentially repeating the thirteenth step of counting the reburn and performing forced combustion for the set time; And When the count reaches a predetermined number of times, when the water flow is switched off, the fifteenth step of terminating the combustion control is sequentially performed, when the heating operation is performed using the temperature of the hot water and the hot water of the gas boiler. Combustion control method. The method according to claim 1, When there is an abnormality in only one thermistor (TH1 or TH2) among the two thermistors (TH1 and TH2) in the first step of detecting the low water level and ground fault and at the same time detecting the state of thermistors (TH1, TH2) and the remote controller. In the case of emergency operation, and if both thermistors are abnormal, the combustion control method during heating operation using the temperature of the hot water and heating return of the gas boiler characterized in that the processing in error mode. The method according to claim 1, In the first step of detecting the low water level and ground fault and detecting the states of thermistors (TH1, TH2) and the remote controller, if there are no abnormalities in the two thermistors and only in the connection state of the remote controller, emergency operation is performed. Combustion control method during heating operation using the temperature of the hot water and heating return of the gas boiler characterized in that. The method according to claim 1, In the fourth step of detecting whether the input user set temperature (Tset) is within the range of the normally used temperature, the range of the normally used temperature ranges from 35 ° C. to 85 ° C. Combustion control method in heating operation using temperature of heating return. The method according to claim 1 or 4, When the microcomputer recognizes the user set temperature is less than 35 ℃ for a predetermined time (Rsec), the heating control method for the combustion operation during the heating operation using the temperature of the hot water and heating return of the gas boiler, characterized in that for performing. The method according to claim 4, And a rapid operation when the user set temperature (Tset) is recognized for a time set to 85 ° C. or more. The method according to claim 1, When the user set temperature (Tset) is recognized as set outside the 35 ℃ to 85 ℃ set during the emergency operation, the combustion control method during the heating operation using the temperature of the hot water and heating return of the gas boiler characterized in that for performing the emergency operation. The method according to claim 1, In the fifth step of performing forced combustion for a predetermined time according to the control of the preset gas proportional valve opening / closing amount, the set time is a time taken for the circulating water to circulate once in the heating pipe of the gas boiler. Control method of combustion during heating operation by using temperature of hot water and heating return water The method according to claim 1, In the fifth step of calculating the total heat amount (Q) required for the heating, the maximum heat amount during the maximum hot water combustion of the heating operation, Minimum heat during minimum hot water combustion, The maximum heat during maximum heating and combustion, Minimum heat during minimum heating and burning, Forced combustion heat during heating and, Calculation of calorific value of calories burned in hot water combustion, and the limit of the above calories is the maximum calorie value at the maximum hot water combustion, the maximum calorie value at the maximum heating combustion, the forced calorific value at the time of hot water combustion, Minimum calorific value ＞ The method of combustion control during heating operation using the temperature of hot water and heating return of a gas boiler, characterized in that it is set to the minimum calorific value during the minimum hot water combustion. The method according to claim 1, The difference between the user set temperature (Tset) and the tapping temperature (Tout) while the temperature difference (T) is between predetermined temperature values (C ° C, D ° C) T ₁ = | Tset-Tout |) is between different predetermined temperature values (E ℃, F ℃) or the difference between user set temperature (Tset) and return temperature (Tin) (△ T ₂ In the eleventh step of determining whether | Tset-Tin |) is between other predetermined temperature values (G ° C and H ° C) for a predetermined time (Isec) and extinguishing when the condition is satisfied, the predetermined temperature values are C ° C. <D ° C <E ° C <F ° C <G ° C <H ° C A combustion control method for heating operation using the temperature of hot water and heating return of a gas boiler. The method according to claim 1, The difference between the user set temperature (Tset) and the tapping temperature (Tout) while the temperature difference (T) is between predetermined temperature values (J ° C, K ° C) T ₁ = | Tset-Tout |) is between different predetermined temperature values (L ℃, M ℃) or the difference between user set temperature (Tset) and return temperature (Tin) (△ T ₂ In the twelfth step of judging whether | Tset-Tin |) is between other predetermined temperature values (N ° C and O ° C) for a predetermined time (Psec) and re-igniting when the condition is satisfied, the predetermined temperature values are P A combustion control method for heating operation using a temperature of heating hot water and heating return of a gas boiler, wherein the temperature is set to ° C <K ° C <L ° C <M ° C <N ° C <O ° C.