A control method and device for a condensing gas heating device

Abstract

This invention relates to the field of heating equipment control technology, and discloses a control method and device for a condensing gas heating system. The method includes: acquiring the real-time return water temperature and real-time outlet water temperature of the condensing gas heating system at set intervals; determining the first output heat of the gas heating system in one combustion cycle based on the real-time return water temperature and real-time outlet water temperature; determining that the condensing gas heating system is in a thermal equilibrium state based on the difference between the first output heat of the condensing gas heating system in the current combustion cycle and the previous combustion cycle being less than or equal to a set heat difference threshold; acquiring and recording the balanced heat load before the condensing gas heating system shuts down during the combustion cycle in which the condensing gas heating system is in a thermal equilibrium state; and controlling the condensing gas heating system to operate with a balanced heat load in the next combustion cycle. This effectively ensures a good user experience and effectively reduces the gas consumption of the condensing gas heating system without changing parameters such as the supply and return water temperature difference.

Description

Technical Field

[0001] This invention relates to the field of heating equipment control technology, specifically to a control method and device for a condensing gas heating system. Background Technology

[0002] With the widespread application of condensing gas-fired heating and hot water boilers, users have increasingly higher requirements for their energy efficiency and gas savings. A key indicator of energy saving and gas savings is average gas consumption, which is mainly affected by two factors: gas consumption during combustion and the ignition cycle. The ignition cycle includes combustion time and the recirculation time after flameout.

[0003] In related technologies, some condensing gas heating systems improve heat exchange efficiency by recovering latent heat from flue gas. The principle is that as the system return water temperature decreases, water vapor in the flue gas further condenses, thereby increasing the heating system's thermal efficiency. However, heating systems are mostly in a heat preservation state during normal operation, where the return water temperature is relatively high. Therefore, recovering latent heat from the flue gas cannot effectively improve heat exchange efficiency. To address this, some systems extend the ignition cycle by increasing the temperature difference between the supply and return water, thus reducing energy consumption. However, this temperature difference leads to significant temperature fluctuations in the heated area, affecting the user experience. Summary of the Invention

[0004] In view of this, the present invention provides a control method and apparatus for condensing gas heating equipment to solve or at least partially solve the above-mentioned technical problems.

[0005] In a first aspect, the present invention provides a control method for a condensing gas heating system, the method comprising: The real-time return water temperature and real-time outlet water temperature of the condensing gas heating equipment are obtained at set intervals. The first output heat of a gas heating equipment in one combustion cycle is determined based on the real-time return water temperature and the real-time outlet water temperature. Based on the fact that the difference between the first output heat of the condensing gas heating equipment in the current combustion cycle and the first output heat of the previous combustion cycle is less than or equal to the set heat difference threshold, the condensing gas heating equipment is determined to be in a state of thermal equilibrium. Acquire and record the balanced heat load of the condensing gas heating equipment in thermal equilibrium state during the current combustion cycle, wherein the balanced heat load is the actual operating load of the condensing gas heating equipment before the flameout in this combustion cycle; Control the condensing gas heating equipment to operate in a balanced heat load during the next combustion cycle.

[0006] This invention discloses a new program for condensing gas heating equipment. It acquires the real-time inlet and outlet water temperatures of the condensing gas heating equipment and determines the heat output of the equipment in each combustion cycle based on these temperatures. When the output heat output of two adjacent combustion cycles is equal, the equipment is considered to have reached thermal equilibrium. The program acquires and records the equilibrium heat load before the equipment shuts off during the current combustion cycle, identifying a minimum load that maintains stable operation. The condensing gas heating equipment is then controlled to operate at this equilibrium heat load in the next combustion cycle, resulting in a longer combustion time for the same energy output. This lengthens the combustion cycle for the same heat output, effectively reducing the average gas consumption of the condensing gas heating equipment. Furthermore, if the gas heating equipment operates at a high flow rate, it can be forced to burn at a lower load, resulting in a lower outlet water temperature and a slower rise in outlet water temperature. This facilitates condensation, improves machine efficiency, and reduces gas consumption for the same heat output. Therefore, compared to the rapid temperature rise in the heating area due to high load combustion during the initial combustion phase and the large temperature fluctuations within a combustion cycle, the condensing gas heating equipment control method of this invention stabilizes the heat load at a relatively low equilibrium heat load, with slow changes in output energy. This effectively avoids large temperature fluctuations in the heating area and significantly improves the user experience. Furthermore, maintaining low-load combustion in the gas heating equipment also significantly reduces combustion noise, further enhancing the user experience.

[0007] In some alternative implementations, after controlling the condensing gas heating system to operate in the next combustion cycle to balance the heat load, the method further includes: The second output heat of the condensing gas heating equipment in the current combustion cycle is determined based on the real-time return water temperature and the real-time outlet water temperature. When the relationship between the first output heat and the second output heat meets the preset shutdown conditions, the condensing gas heating equipment is shut down.

[0008] In some alternative implementations, after controlling the condensing gas heating system to operate in the next combustion cycle to balance the heat load, the method further includes: The timing starts when the real-time outlet water temperature reaches the target outlet water temperature; When the duration of the timed operation exceeds the preset heating balance time, the condensing gas heating equipment will be shut down.

[0009] In some alternative implementations, before the timing duration exceeds a preset heating balance time, the method further includes: If the real-time outlet water temperature is greater than or equal to the set shutdown temperature threshold before the timing duration is less than or equal to the preset heating balance time, the condensing gas heating equipment will be shut down.

[0010] The present invention provides a control method for condensing gas heating equipment. When the real-time outlet water temperature reaches the target outlet water temperature and continues for a preset heating balance time, or when the real-time outlet water temperature reaches the target outlet water temperature and quickly reaches the set shutdown temperature threshold, the condensing gas heating equipment is promptly shut down. This significantly extends the delay time of the condensing gas heating equipment, thereby achieving the goal of energy saving and consumption reduction.

[0011] In some optional implementations, the preset shutdown condition includes: the second output heat is greater than or equal to the first output heat.

[0012] The present invention provides a control method for condensing gas heating equipment. When the real-time outlet water temperature reaches the target outlet water temperature and continues for a preset heating balance time, or when the real-time outlet water temperature reaches the target outlet water temperature and quickly reaches the set shutdown temperature threshold, the condensing gas heating equipment is promptly shut down. This significantly extends the delay time of the condensing gas heating equipment, thereby achieving the goal of energy saving and consumption reduction.

[0013] In some alternative implementations, the method further includes, prior to controlling the condensing gas heating system to operate in the next combustion cycle to balance the heat load: Control the water pump of the condensing gas heating equipment to operate at maximum pump power; When the real-time outlet water temperature is less than or equal to the ignition temperature threshold, the condensing gas heating equipment is controlled to ignite and start.

[0014] In some alternative implementations, the method further includes, prior to controlling the condensing gas heating system to operate in the next combustion cycle to balance the heat load: Obtain the supply and return temperature difference between the real-time outlet water temperature and the real-time return water temperature when the condensing gas heating equipment is ignited, started, and runs for a set duration. Adjust the water pump power to make the supply and return temperature difference equal to the set temperature difference, where the set temperature difference is the difference between the target outlet water temperature and the real-time outlet water temperature when the condensing gas heating equipment is ignited and started in the current combustion cycle. Record the water pump balance power of the condensing gas heating system when the supply and return temperature difference is equal to the set temperature difference.

[0015] In some alternative implementations, the method further includes, prior to controlling the condensing gas heating system to operate in the next combustion cycle to balance the heat load: The water pumps of the condensing gas heating system are controlled to operate at the pump balance power.

[0016] In some optional implementations, the preset shutdown conditions include: The first and second output heats meet the following conditions: ; Where Y represents the second output heat; X represents the first output heat; Indicates the set temperature difference; This indicates the temperature difference between the supply and return.

[0017] In a second aspect, the present invention provides a control device for a condensing gas heating system, the device comprising: The temperature acquisition module is used to acquire the real-time return water temperature and real-time outlet water temperature of the condensing gas heating equipment at set intervals. The first heat module is used to determine the first output heat of the gas heating equipment for one combustion cycle based on the real-time return water temperature and the real-time outlet water temperature. The balance identification module is used to determine that the condensing gas heating equipment is in a thermal balance state based on the fact that the difference between the first output heat of the current combustion cycle and the first heat output heat of the previous combustion cycle is less than or equal to a set heat difference threshold. The load acquisition module is used to acquire and record the balanced heat load of the condensing gas heating equipment before the combustion cycle shutdown when the equipment is in thermal equilibrium during the current combustion cycle. The balanced heat load is the actual operating load of the condensing gas heating equipment before the combustion cycle shutdown. The operation control module is used to control the condensing gas heating equipment to operate in a balanced heat load during the next combustion cycle.

[0018] Thirdly, the present invention provides a condensing gas heating device, including: a controller; The controller includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes the computer instructions to perform the condensing gas heating equipment control method of the first aspect or any corresponding embodiment described above. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating the control method for a condensing gas heating system according to an embodiment of the present invention. Figure 2 This is a flowchart illustrating another control method for a condensing gas heating system according to an embodiment of the present invention. Figure 3 This is a flowchart illustrating a first specific application example of the control method for a condensing gas heating device according to an embodiment of the present invention. Figure 4 This is a flowchart illustrating a first specific application example of the control method for a condensing gas heating device according to an embodiment of the present invention. Figure 5 This is a structural block diagram of a condensing gas heating equipment control device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the hardware structure of the controller of the condensing gas heating equipment according to an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention provides a control method and apparatus for condensing gas heating equipment to solve or at least partially solve the above-mentioned technical problems.

[0023] Specifically, in related technologies, the heating equipment is usually controlled to operate based on the heating temperature set by the user. In this way, the heat load of the equipment is initially large and then decreases. In the initial stage of combustion, the load is large, and the return water temperature can rise to the target temperature in a short time. This method is not conducive to the condensation of condensing gas heating equipment.

[0024] To address this, the new program for the condensing gas heating equipment of this invention determines that the equipment has reached a thermal equilibrium state when the output heat of two adjacent combustion cycles is equal. It acquires and records the equilibrium heat load before the flameout of the combustion cycle in which the condensing gas heating equipment is in thermal equilibrium during the current combustion cycle. This equilibrium heat load is a minimum load that can maintain stable operation of the equipment. By controlling the condensing gas heating equipment to operate at this equilibrium heat load in the next combustion cycle, the combustion time for the same energy output is longer. Therefore, the combustion cycle for the same output heat becomes longer, effectively reducing the average gas consumption of the condensing gas heating equipment. Furthermore, if the gas heating equipment operates at a high flow rate, it can also be forced to burn at a lower load, resulting in a lower outlet water temperature and a slower rise in return water temperature. This makes condensation easier, improves machine efficiency, and reduces combustion gas consumption for the same output heat. Therefore, compared to the rapid temperature rise in the heating area due to high combustion load during the initial combustion phase and the large temperature fluctuations within a combustion cycle, the condensing gas heating system maintains a stable heat load at a relatively low equilibrium heat load, with slow changes in output energy. This effectively avoids large temperature fluctuations in the heating area and significantly improves the user experience. Furthermore, maintaining low combustion load significantly reduces combustion noise, further enhancing the user experience.

[0025] According to an embodiment of the present invention, a control method for a condensing gas heating device is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0026] This embodiment provides a control method for a condensing gas heating system, which can be used in condensing gas heating systems, etc. Figure 1 This is a flowchart of a control method for a condensing gas heating system according to an embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps: Step S101: Obtain the real-time return water temperature and real-time outlet water temperature of the condensing gas heating equipment at set intervals.

[0027] In some alternative implementations, the set duration can be 1 second, or other suitable time. Real-time return water temperature and real-time outlet water temperature can be obtained using temperature sensors.

[0028] Step S102: Determine the first output heat of the gas heating equipment for one combustion cycle based on the real-time return water temperature and the real-time outlet water temperature.

[0029] In some optional implementations, Tin represents the real-time return water temperature, and Tout represents the real-time outlet water temperature. Taking a set duration of 1 second as an example, during the combustion period of a condensing gas heating system, the heat output per second of the system can be represented by C × L1 × ΔT, where C represents the specific heat capacity of water, and L1 represents the water flow rate of the gas heating system. One combustion cycle refers to the time from ignition to shutdown of the heating system. Therefore, the first heat output of the gas heating system in one combustion cycle can be obtained by superimposing the heat output per second of the system; in actual calculations, integral algorithms can be used.

[0030] Step S103: Based on the fact that the difference between the first output heat of the condensing gas heating equipment in the current combustion cycle and the first output heat in the previous combustion cycle is less than or equal to the set heat difference threshold, it is determined that the condensing gas heating equipment is in a thermal equilibrium state.

[0031] In some alternative implementations, the set heat difference threshold can be expressed as the ratio of the difference in the first output heat of two adjacent combustion cycles, or as the difference in specific heat values.

[0032] For example, if the heat difference threshold is set to 5%, the first output heat of two adjacent combustion cycles is represented as Q1 and Q2 in chronological order. When (Q1-Q2) / Q1≤5%, the condensing gas heating equipment is determined to be in thermal equilibrium.

[0033] Step S104: Obtain and record the balanced heat load of the condensing gas heating equipment in thermal equilibrium state during the current combustion cycle.

[0034] The load of a condensing gas heating system is constantly changing before it reaches thermal equilibrium. Once the condensing gas heating system is determined to be in thermal equilibrium, the actual operating load of the system before the flameout in this combustion cycle can be obtained directly from the controller of the condensing gas heating system as the balancing heat load.

[0035] Step S105: Control the condensing gas heating equipment to operate in the next combustion cycle to balance the heat load.

[0036] In some alternative implementations, the condensing gas heating system can be controlled to operate at the balanced heat load determined by the above-described operating steps in the next combustion cycle. Specifically, the system can be operated at a balanced heat load by controlling the gas proportional valve.

[0037] This invention discloses a control method for condensing gas heating equipment. It acquires the real-time return water temperature and outlet water temperature of the condensing gas heating equipment and determines the heat output of the equipment in each combustion cycle based on these temperatures. Thus, without changing parameters such as the supply and return water temperature difference, the method promptly determines how the condensing gas heating equipment reaches thermal equilibrium. Once thermal equilibrium is achieved, the method controls the equipment to operate in the next combustion cycle to balance the heat load. This ensures that the energy generated by the condensing gas heating equipment is fully released into the system environment, effectively avoiding energy waste caused by high output heat due to rapid heating at high loads. Therefore, while ensuring a good user experience, this method effectively reduces the gas consumption of the condensing gas heating equipment.

[0038] This embodiment provides a control method for a condensing gas heating system, which can be used in condensing gas heating systems, etc. Figure 2 This is a flowchart of a control method for a condensing gas heating system according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps: Step S201: Obtain the real-time return water temperature and real-time outlet water temperature of the condensing gas heating equipment at set intervals.

[0039] Please see details Figure 1 Step S101 of the illustrated embodiment will not be described again here.

[0040] Step S202: Determine the first output heat of the gas heating equipment for one combustion cycle based on the real-time return water temperature and the real-time outlet water temperature.

[0041] Please see details Figure 1 Step S102 of the illustrated embodiment will not be described again here.

[0042] Step S203: Based on the fact that the difference between the first output heat of the condensing gas heating equipment in the current combustion cycle and the first output heat in the previous combustion cycle is less than or equal to the set heat difference threshold, it is determined that the condensing gas heating equipment is in a thermal equilibrium state.

[0043] Please see details Figure 1 Step S103 of the illustrated embodiment will not be described again here.

[0044] Step S204: Obtain and record the balanced heat load of the condensing gas heating equipment in thermal equilibrium state during the current combustion cycle.

[0045] Please see details Figure 1 Step S104 of the illustrated embodiment will not be described again here.

[0046] Step S205: Control the condensing gas heating equipment to operate in the next combustion cycle to balance the heat load.

[0047] Please see details Figure 1 Step S105 of the illustrated embodiment will not be described again here.

[0048] Step S206: Determine the second output heat of the condensing gas heating equipment within the current combustion cycle based on the real-time return water temperature and the real-time outlet water temperature.

[0049] In some alternative implementations, the calculation of the second output heat can be performed using a method similar to that used for the calculation of the first output heat described above, which will not be repeated here.

[0050] Step S207: When the relationship between the first output heat and the second output heat meets the preset shutdown conditions, the condensing gas heating equipment is shut down.

[0051] In some alternative implementations, the preset shutdown condition may include: the second output heat is greater than or equal to the first output heat.

[0052] Specifically, for heating equipment without frequency conversion, i.e., where the water pump operates at a fixed power or is controlled to run at a fixed default power, a simple comparison can determine whether the second output heat is greater than the first output heat. Here, the first output heat refers to the first output heat during the combustion cycle when the condensing gas heating equipment reaches thermal equilibrium, which can be denoted as X. The second output heat is the output heat in the current combustion cycle, which can be denoted as Y. When Y ≥ X, the condensing gas heating equipment can be shut off.

[0053] The control logic for restarting gas heating equipment can typically be determined using a "positive 5, negative 10" judgment method. Specifically, when the real-time outlet water temperature is lower than the target outlet water temperature and the difference between the real-time outlet water temperature and the target outlet water temperature is greater than 10°, the gas heating equipment is controlled to restart.

[0054] Compared to related technologies where the gas-fired heating equipment is shut down when the real-time outlet water temperature exceeds the target outlet water temperature and the difference between the real-time outlet water temperature and the target outlet water temperature is greater than 5°C, the condensing gas-fired heating equipment control method of this invention promptly shuts down the condensing gas-fired heating equipment when the real-time outlet water temperature reaches the target outlet water temperature and continues for a preset heating balance time, or when the real-time outlet water temperature reaches the target outlet water temperature and quickly reaches the set shutdown temperature threshold. This significantly extends the delay time of the condensing gas-fired heating equipment, thereby achieving the goal of energy saving and consumption reduction.

[0055] It should be noted that the target outlet water temperature mentioned here and in other descriptions of this invention can be the heating set temperature of a condensing heating system.

[0056] In some optional embodiments, after step S205, the condensing heating equipment control method of the present invention may further include the following operational steps: Step S208: Start timing when the real-time outlet water temperature reaches the target outlet water temperature.

[0057] Step S209: If the real-time outlet water temperature is greater than or equal to the set shutdown temperature threshold before the timing duration is less than or equal to the preset heating balance time, control the condensing gas heating equipment to shut down.

[0058] Step S210: When the duration of the timed operation exceeds the preset heating balance time, control the condensing gas heating equipment to shut off. The steps S208 to S210 above are designed to prevent the temperature from rising rapidly before the condensing gas heating equipment reaches thermal equilibrium.

[0059] Specifically, if the real-time outlet water temperature reaches the target outlet water temperature, the heating equipment will be shut down to stop combustion. Similarly, after the real-time outlet water temperature reaches the target outlet water temperature and the preset heating balance time is reached, the condensing gas heating equipment will also be shut down in a timely manner.

[0060] The preset balancing time can be 10-90 minutes, or other suitable times set according to actual needs. Furthermore, in cases where the real-time outlet water temperature rises faster, if the real-time outlet water temperature is greater than or equal to the set shutdown temperature threshold before the timing period is less than or equal to the preset heating balancing time, the condensing gas heating equipment will be shut down promptly based solely on this condition. The shutdown temperature threshold can be configured based on the target outlet water temperature; for example, if the target outlet water temperature is Tset, the shutdown temperature threshold can be set to Tset + 5°C.

[0061] The present invention provides a control method for condensing gas heating equipment. When the real-time outlet water temperature reaches the target outlet water temperature and continues for a preset heating balance time, or when the real-time outlet water temperature reaches the target outlet water temperature and quickly reaches the set shutdown temperature threshold, the condensing gas heating equipment is promptly shut down. This significantly extends the delay time of the condensing gas heating equipment, thereby achieving the goal of energy saving and consumption reduction.

[0062] In some alternative implementations, for non-inverter condensing gas heating systems, the following operations are also performed before controlling the condensing gas heating system to operate in the next combustion cycle to balance the heat load: Step a1: Control the water pump of the condensing gas heating equipment to operate at maximum pump power.

[0063] Step a2: When the real-time outlet water temperature is less than or equal to the ignition temperature threshold, control the condensing gas heating equipment to ignite and start.

[0064] In some alternative implementations, the ignition temperature threshold can be configured based on the target outlet water temperature, for example, if the target outlet water temperature is Tset, the ignition temperature threshold can be Tset - 10°.

[0065] It should be noted that the specific values ​​involved in this invention can be adjusted and configured according to actual needs, and this invention does not impose any specific limitations on them.

[0066] In some alternative implementations, for condensing gas heating equipment with variable frequency capability, the following operations are also performed before controlling the condensing gas heating equipment to operate in the next combustion cycle to balance the heat load: Step b1: Obtain the real-time outlet water temperature and the supply-return temperature difference when the condensing gas heating equipment is ignited, started, and runs for a set duration.

[0067] Step b2: Adjust the water pump power so that the supply and return temperature difference is equal to the set temperature difference, where the set temperature difference is the difference between the target outlet water temperature and the real-time outlet water temperature when the condensing gas heating equipment is ignited and started in the current combustion cycle.

[0068] Here, the difference between the target outlet water temperature and the real-time outlet water temperature when the condensing gas heating equipment is ignited and started in the current combustion cycle is first calculated to determine the set temperature difference.

[0069] The supply and return temperature difference can be made equal to the set temperature difference by adjusting the water pump power.

[0070] Step b3: Record the water pump balance power of the condensing gas heating system when the supply and return temperature difference is equal to the set temperature difference.

[0071] When the supply and return temperature difference is equal to the set temperature difference, the water pump power can be directly read and recorded.

[0072] Step b4: Control the water pump of the condensing gas heating equipment to operate at the water pump balance power.

[0073] In some alternative implementations, for condensing gas heating equipment with variable frequency function, the preset flameout condition can be set such that the first output heat and the second output heat meet the following conditions: ; Where Y represents the second output heat; X represents the first output heat; Indicates the set temperature difference; This indicates the temperature difference between the supply and return.

[0074] Therefore, if a gas-fired heating system has a built-in variable frequency water pump, and the pump adjusts its flow rate based on the balanced heat load, before the flow rate adjustment, the pump operates at its maximum flow rate L1, corresponding to a power of P0. After the flow rate adjustment, the flow rate is L2, and the corresponding power is P1. To maintain a constant real-time outlet water temperature, the efficiency of the heating system must remain unchanged. Before and after the pump flow rate adjustment, the output heat of the heating system remains constant. This leads to the following formula: L1×△T1=L2×△T2; in, Indicates the set temperature difference; This indicates the temperature difference between the supply and return.

[0075] Furthermore, △T2 can be set based on the aforementioned temperature difference setting method. This allows for the calculation of the water pump's balanced power. When controlling the condensing gas heating system to operate at its balanced power during the next combustion cycle to balance the heat load, the water pump is controlled to operate at this balanced power. This further ensures that energy waste caused by water flow fluctuations is avoided, thereby guaranteeing the effective utilization of the condensing gas heating system's output heat.

[0076] This embodiment provides a control method for a condensing gas heating system, which can be used in condensing gas heating systems, etc. Figure 3 This is a flowchart illustrating a first specific application example of the control method for a condensing gas heating system according to an embodiment of the present invention. This specific application example pertains to a condensing heating system without a variable frequency water pump or where the water pump is controlled to operate at a fixed power. For example... Figure 3 As shown, the process includes the following steps: Step S301: Control the water pump of the condensing heating equipment to operate at the maximum power P0 of the water pump.

[0077] Step S302: Determine whether the condition Tout < Tset -10° is met.

[0078] Specifically, it can be determined whether the real-time outlet water temperature T is lower than the target outlet water temperature, and whether the difference between the two is greater than a set difference. The set difference can be 10. If yes, then proceed to step S303; otherwise, return to step S302.

[0079] Step S303: Control the condensing gas heating equipment to operate at the target outlet water temperature.

[0080] Here, the equipment is controlled by the target outlet water temperature. In the initial stage, the equipment operates at a higher power, allowing the heating equipment to quickly reach a thermal equilibrium state.

[0081] Step S304: Determine whether the duration for which the real-time outlet water temperature reaches the target outlet water temperature is greater than the preset heating balance time.

[0082] If yes, proceed to step S306; otherwise, proceed to step S305.

[0083] Step S305: Within the preset heating balance time, determine whether the real-time outlet water temperature is greater than the set shutdown temperature threshold. Here, the flameout temperature threshold can be set based on the target outlet water temperature. For example, if the target outlet water temperature is Tset, the flameout temperature threshold can be set to Tset + 5°.

[0084] If yes, proceed to step S306; otherwise, proceed to step S304.

[0085] Step S306: Control the condensing gas heating equipment to shut off.

[0086] Step S307: During the period from the start of ignition to the end of flameout of the condensing gas heating equipment, calculate the total energy output X of the equipment during the process of supply and return temperature difference ΔT per second, with the initial value of X being 0.

[0087] Step S308: Determine whether the difference in output energy between two adjacent combustion cycles is less than a set threshold.

[0088] Specifically, please refer to step S103 above. Here, △X can be understood as (Q1-Q2) / Q1 in step S103. If △X≤5%, it can be determined that the condensing gas heating equipment is in a thermal equilibrium state. Step S309 can then be executed. Otherwise, return to step S301.

[0089] Step S309: Obtain the heat load before the current combustion cycle is shut down.

[0090] You can refer to step S104 above, which will not be repeated here.

[0091] Step S310: Control the water pump to operate at its maximum power P0.

[0092] Step S311: Determine whether the real-time outlet water temperature T_out meets the condition T_out < T_set -10°.

[0093] If yes, proceed to step S312; otherwise, return to step S310.

[0094] Step S312: Control the heating equipment to ignite and operate with the balanced heat load obtained in S309.

[0095] Step S313: Determine whether the duration for which the real-time outlet water temperature reaches the target outlet water temperature is greater than the preset heating balance time.

[0096] Step S314: Within the preset heating balance time, determine whether the real-time outlet water temperature is greater than the set shutdown temperature threshold.

[0097] Step S315: Control the condensing gas heating equipment to shut off.

[0098] Step S316: During the period from the start of ignition to the end of flameout of the condensing gas heating equipment, calculate the total energy output Y of the equipment during the process of the supply and return temperature difference ΔT per second.

[0099] Here, you can refer to step S206 above, which will not be repeated here.

[0100] Step S317: Determine whether Y≥X is satisfied.

[0101] If yes, proceed to step S315; otherwise, proceed to step S312.

[0102] Here you can refer to step S207 above, where Y can refer to the second output heat and X can refer to the first output heat.

[0103] This embodiment provides a control method for a condensing gas heating system, which can be used in condensing gas heating systems, etc. Figure 4 This is a flowchart illustrating a first specific application example of the control method for a condensing gas heating system according to an embodiment of the present invention. This specific application example pertains to a condensing heating system equipped with a variable frequency water pump. For example... Figure 4 As shown, here because Figure 4 The process involves many steps, so to make the accompanying diagrams clearer, the descriptions of each step are simplified. Here... Figure 4 The parameters and abbreviated expressions involved will be explained appropriately.

[0104] Specifically, Tout represents the real-time outlet water temperature mentioned above, and Tset represents the target outlet water temperature mentioned above. "Controlling combustion with Tset as the target" can be found in step S303 above. "Flameout" refers to controlling the condensing gas heating equipment to shut down. "△X ≤ 5% twice" can be found in step S308 above. "△T2 = Tset - Tout (at ignition)?" can be found in step b2 above; the water pump power P1 is the water pump balance power mentioned above. The heating balance time is the preset heating balance time mentioned above.

[0105] Figure 4 Further details of the illustrated embodiments can be found above. Figures 1-3 The operating steps shown will not be repeated here.

[0106] This embodiment also provides a control device for a condensing gas heating system, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0107] This embodiment provides a control device for a condensing gas heating system, such as... Figure 5 As shown, it includes: Temperature acquisition module 501 is used to acquire the real-time return water temperature and real-time outlet water temperature of condensing gas heating equipment at set intervals. The first heat module 502 is used to determine the first output heat of the gas heating equipment for one combustion cycle based on the real-time return water temperature and the real-time outlet water temperature. The balance identification module 503 is used to determine that the condensing gas heating equipment is in a thermal balance state based on the fact that the difference between the first output heat of the condensing gas heating equipment in the current combustion cycle and the first output heat of the previous combustion cycle is less than or equal to a set heat difference threshold. The load acquisition module 504 is used to acquire and record the balanced heat load of the condensing gas heating equipment in a thermal equilibrium state during the current combustion cycle. The operation control module 505 is used to control the condensing gas heating equipment to operate in the next combustion cycle to balance the heat load.

[0108] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0109] In this embodiment, the condensing gas heating equipment control device is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0110] This invention also provides a controller for a condensing gas heating system, having the above-mentioned features. Figure 5 The control device for the condensing gas heating equipment shown is shown.

[0111] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a controller provided in an optional embodiment of the present invention, such as... Figure 6As shown, the controller includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise as required. The processors can process instructions executed within the controller, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple controllers can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 6 Take a processor 10 as an example.

[0112] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0113] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0114] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the controller. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the controller via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0115] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0116] The controller also includes a communication interface 30 for communicating with other devices or communication networks.

[0117] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0118] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0119] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the technical solutions of the present invention.

Claims

1. A control method for a condensing gas heating system, characterized in that, The method includes: The real-time return water temperature and real-time outlet water temperature of the condensing gas heating equipment during the current combustion cycle are obtained at set intervals. The first output heat of the gas heating equipment for one combustion cycle is determined based on the real-time return water temperature and the real-time outlet water temperature. Based on the fact that the difference between the first output heat of the condensing gas heating equipment in the current combustion cycle and the first output heat in the previous combustion cycle is less than or equal to a set heat difference threshold, it is determined that the condensing gas heating equipment is in a thermal equilibrium state. Acquire and record the balanced heat load of the condensing gas heating equipment in a thermal equilibrium state during the current combustion cycle, wherein the balanced heat load is the actual operating load of the condensing gas heating equipment before the flameout in this combustion cycle; The condensing gas heating equipment is controlled to operate at the balanced heat load in the next combustion cycle.

2. The method according to claim 1, characterized in that, After controlling the condensing gas heating equipment to operate at the balanced heat load in the next combustion cycle, the method further includes: The second output heat of the condensing gas heating equipment in the current combustion cycle is determined based on the real-time return water temperature and the real-time outlet water temperature. When the relationship between the first output heat and the second output heat meets the preset shutdown conditions, the condensing gas heating equipment is shut down.

3. The method according to claim 2, characterized in that, After controlling the condensing gas heating equipment to operate at the balanced heat load in the next combustion cycle, the method further includes: The timing begins when the real-time outlet water temperature reaches the target outlet water temperature; When the duration of the timed operation exceeds the preset heating balance time, the condensing gas heating equipment is shut down.

4. The method according to claim 3, characterized in that, Before the duration of the timing exceeds the preset heating balance time, the method further includes: If the real-time outlet water temperature is greater than or equal to the set shutdown temperature threshold before the timing duration is less than or equal to the preset heating balance time, the condensing gas heating equipment is controlled to shut down.

5. The method according to claim 2, characterized in that, The preset shutdown condition includes: the second output heat is greater than or equal to the first output heat.

6. The method according to claim 2, characterized in that, Before controlling the condensing gas heating system to operate at the balanced heat load in the next combustion cycle, the method further includes: The water pump of the condensing gas heating system is controlled to operate at maximum pump power. When the real-time outlet water temperature is less than or equal to the ignition temperature threshold, the condensing gas heating equipment is controlled to ignite and start.

7. The method according to claim 6, characterized in that, Before controlling the condensing gas heating equipment to operate at the balanced heat load in the next combustion cycle, the method further includes: The supply and return temperature difference is obtained when the condensing gas heating equipment is ignited, started, and runs for a set period of time. Adjust the water pump power so that the supply and return temperature difference is equal to the set temperature difference, wherein the set temperature difference is the difference between the target outlet water temperature and the real-time outlet water temperature when the condensing gas heating equipment is ignited and started in the current combustion cycle. Record the water pump balance power of the condensing gas heating equipment when the supply and return temperature difference is equal to the set temperature difference.

8. The method according to claim 7, characterized in that, Before controlling the condensing gas heating system to operate at the balanced heat load in the next combustion cycle, the method further includes: The water pump of the condensing gas heating system is controlled to operate at the water pump's balanced power.

9. The method according to claim 8, characterized in that, The preset shutdown conditions include: The first output heat and the second output heat meet the following conditions: ； Where Y represents the second output heat; X represents the first output heat; This indicates the set temperature difference; This indicates the supply and return temperature difference.

10. A control device for a condensing gas heating system, characterized in that, The device includes: The temperature acquisition module is used to acquire the real-time return water temperature and real-time outlet water temperature of the condensing gas heating equipment at set intervals. The first heat module is used to determine the first output heat of the gas heating equipment for one combustion cycle based on the real-time return water temperature and the real-time outlet water temperature. The balance identification module is used to determine that the condensing gas heating equipment is in a thermal balance state based on the fact that the difference between the first output heat of the condensing gas heating equipment in the current combustion cycle and the first output heat of the previous combustion cycle is less than or equal to a set heat difference threshold. The load acquisition module is used to acquire and record the balanced heat load of the condensing gas heating equipment in the current combustion cycle when it is in a thermal equilibrium state, wherein the balanced heat load is the actual operating load of the condensing gas heating equipment before it is shut down in this combustion cycle. The operation control module is used to control the condensing gas heating equipment to operate at the balanced heat load in the next combustion cycle.

11. A condensing gas heating system, characterized in that, include: Controller; The controller includes a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the condensing gas heating equipment control method according to any one of claims 1 to 9.

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