CN111578306A - Self-adaptive control method and device for wall-mounted gas boiler and wall-mounted gas boiler system - Google Patents
Self-adaptive control method and device for wall-mounted gas boiler and wall-mounted gas boiler system Download PDFInfo
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- CN111578306A CN111578306A CN202010401035.1A CN202010401035A CN111578306A CN 111578306 A CN111578306 A CN 111578306A CN 202010401035 A CN202010401035 A CN 202010401035A CN 111578306 A CN111578306 A CN 111578306A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
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- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The application relates to a self-adaptive control method and equipment for a wall-mounted gas boiler and a wall-mounted gas boiler system, wherein the method comprises the following steps: acquiring the outlet water temperature of the gas wall-mounted boiler; when the water outlet temperature and the set water outlet temperature do not accord with preset conditions, adjusting the gas flow of the gas wall-mounted boiler; and correspondingly adjusting the rotating speed of a fan of the gas wall-mounted furnace according to the adjusted gas flow. Through monitoring the leaving water temperature of gas hanging stove, when leaving water temperature and setting for the leaving water temperature and not conform to the preset condition, adopt air-fuel ratio adaptive control to adjust the gas flow and the fan rotational speed of gas hanging stove simultaneously, keep the burning of fuel abundant, carry out accurate accuse temperature, compare with traditional gas hanging stove, improved the control reliability of gas hanging stove.
Description
Technical Field
The application relates to the technical field of household appliances, in particular to a self-adaptive control method and device for a wall-mounted gas boiler and a wall-mounted gas boiler system.
Background
With the development of science and technology and the continuous progress of society, the requirements of users on the quality of life are gradually improved, the comfort in all aspects is continuously improved, and the use and the area of the wall-mounted furnace are also continuously increased. Traditional gas hanging stove sets up combustion parameter when the test of leaving the factory, carries out combustion control according to the combustion parameter who sets up when in actual use for air and gas mixture can not burn under optimum, appear a great deal of problem easily in the working process of combustor, have the shortcoming that control reliability is low.
Disclosure of Invention
In view of the above, it is necessary to provide a wall-mounted gas boiler adaptive control method and apparatus, and a wall-mounted gas boiler system, which can improve the control reliability of the wall-mounted gas boiler, in order to solve the problem of low control reliability of the conventional wall-mounted gas boiler.
A self-adaptive control method for a wall-mounted gas stove comprises the following steps:
acquiring the outlet water temperature of the gas wall-mounted boiler;
when the water outlet temperature and the set water outlet temperature do not accord with preset conditions, adjusting the gas flow of the gas wall-mounted boiler;
and correspondingly adjusting the rotating speed of a fan of the gas wall-mounted furnace according to the adjusted gas flow.
In one embodiment, the preset conditions include: the difference value between the water outlet temperature and the set water outlet temperature is smaller than the set temperature threshold value.
In one embodiment, the obtaining of the outlet water temperature of the gas wall-hanging stove includes: receiving the outlet water temperature sent by the temperature detection device; the temperature detection device is arranged on a water outlet pipe of the gas wall-mounted furnace.
In one embodiment, the adjusting of the gas flow rate of the gas wall-hanging stove includes: and correspondingly controlling the opening of a gas proportional valve of the gas wall-mounted furnace according to the difference value between the outlet water temperature and the set outlet water temperature, so as to adjust the gas flow of the gas wall-mounted furnace.
In one embodiment, after the rotating speed of the fan of the wall-mounted gas boiler is correspondingly adjusted according to the adjusted gas flow, the obtained outlet water temperature of the wall-mounted gas boiler is returned until the outlet water temperature of the wall-mounted gas boiler and the set outlet water temperature meet the preset condition.
In one embodiment, the self-adaptive control method for the wall-mounted gas boiler further comprises the following steps: detecting the oxygen content of the flue gas of the gas wall-mounted furnace in real time, and correspondingly adjusting the air supply quantity of the fan according to the oxygen content of the flue gas.
The utility model provides a gas hanging stove self-adaptation control equipment, includes temperature-detecting device and controlling means, temperature-detecting device sets up in the outlet pipe of gas hanging stove, controlling means connects temperature-detecting device, controlling means is used for heating control according to foretell method.
In one embodiment, the temperature detection device is a thermometer.
In one embodiment, the self-adaptive control device for the wall-mounted gas furnace further comprises an oxygen sensor connected with the control device, and the oxygen sensor is arranged at a smoke outlet of the wall-mounted gas furnace.
A wall-mounted gas boiler system comprises a wall-mounted gas boiler and the wall-mounted gas boiler self-adaptive control equipment.
Above-mentioned hanging stove of gas self-adaptation control method, equipment and hanging stove system of gas, through the leaving water temperature of monitoring hanging stove of gas, when leaving water temperature and setting for the leaving water temperature and not conform to the preset condition, adopt air-fuel ratio self-adaptation control to adjust the gas flow and the fan rotational speed of hanging stove of gas simultaneously, keep the burning of fuel abundant, carry out accurate accuse temperature, compare with traditional hanging stove of gas, improved the control reliability of hanging stove of gas.
Drawings
Fig. 1 is a flow chart illustrating a self-adaptive control method of a wall-mounted gas boiler according to an embodiment;
fig. 2 is a flowchart of an adaptive control method of a wall-mounted gas boiler according to another embodiment;
fig. 3 is a block diagram of an adaptive control apparatus of a wall-mounted gas boiler according to an embodiment;
fig. 4 is a block diagram of a self-adaptive control apparatus of a wall-mounted gas boiler according to another embodiment;
fig. 5 is a schematic diagram illustrating a principle of adaptive control of the wall-mounted gas boiler in an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, there is provided a wall-hanging gas stove adaptive control method, as shown in fig. 1, including:
step S110: and acquiring the outlet water temperature of the gas wall-mounted boiler.
Specifically, the outlet water temperature collected by the gas wall-mounted boiler can be received by a Control device, and the Control device can adopt a controller such as an MCU (Micro Control Unit). The control device can be an independent controller or an original controller of the gas wall-mounted boiler.
The temperature detection device can be arranged on a water outlet or a water outlet pipe of the gas wall-mounted boiler, the water outlet temperature of the gas wall-mounted boiler is detected by the temperature detection device, and a temperature signal is fed back to the control device. The control device can control the wall-mounted gas boiler to heat and output hot water when receiving a heating instruction or detecting that the hot water faucet is opened, and simultaneously controls the temperature detection device to work, and monitors and uploads the outlet water temperature of the wall-mounted gas boiler to serve as a reference basis for self-adaptive control of the wall-mounted gas boiler.
In one embodiment, step S110 includes: receiving the outlet water temperature sent by the temperature detection device; the temperature detection device is arranged on a water outlet pipe of the gas wall-mounted furnace. The temperature detection device can adopt devices such as a thermometer or a temperature sensor. The temperature detection device can be arranged inside or outside the water outlet pipe of the wall-mounted gas furnace, the water outlet temperature of the wall-mounted gas furnace is monitored, and the wall-mounted gas furnace is easy, convenient and reliable to operate.
Step S120: and when the water outlet temperature and the set water outlet temperature do not accord with preset conditions, adjusting the gas flow of the gas wall-mounted furnace.
The user can set up the leaving water temperature through button or touch screen after opening gas hanging stove, and controlling means preserves as setting for leaving water temperature with the temperature of user input. The control device compares the outlet water temperature of the gas wall-mounted boiler with the stored set outlet water temperature after acquiring the outlet water temperature, adjusts the gas flow of the gas wall-mounted boiler if the outlet water temperature and the set outlet water temperature do not accord with the preset condition, and reduces the difference value between the actual outlet water temperature and the set outlet water temperature by increasing or reducing the gas flow of the gas wall-mounted boiler so as to enable the actual outlet water temperature and the set outlet water temperature to accord with the preset condition.
The specific setting of the preset condition is not unique, and the difference between the actual outlet water temperature and the set outlet water temperature is smaller than the set temperature threshold, or the ratio of the actual outlet water temperature to the set outlet water temperature is smaller than the set proportion threshold. In one embodiment, the preset conditions include: the difference value between the water outlet temperature and the set water outlet temperature is smaller than the set temperature threshold value. The specific value of the set temperature threshold is not exclusive and may be, for example, 5 ℃. When the difference between the actual outlet water temperature and the set outlet water temperature exceeds 5 ℃, the gas flow of the gas wall-mounted boiler is adjusted, so that the combustion power of the gas wall-mounted boiler is changed, and the difference between the actual outlet water temperature and the set outlet water temperature is reduced.
Specifically, if the outlet water temperature and the set outlet water temperature do not meet the preset conditions, the gas flow of the gas wall-mounted boiler is controlled to be adjusted according to the actual conditions of the outlet water temperature and the set outlet water temperature. For example, if the actual outlet water temperature is greater than the set outlet water temperature, the gas flow of the gas wall-hanging stove is reduced; and if the actual outlet water temperature is lower than the set outlet water temperature, increasing the gas flow of the gas wall-mounted boiler.
The specific manner of changing the gas flow rate of the gas wall-hanging stove is not exclusive, and in one embodiment, the step S120 includes: and correspondingly controlling the opening of a gas proportional valve of the gas wall-mounted furnace according to the difference value between the outlet water temperature and the set outlet water temperature, so as to adjust the gas flow of the gas wall-mounted furnace. Specifically, the influence of different gas proportional valve opening increments on the outlet water temperature of the gas wall-hanging furnace can be analyzed in advance, and the corresponding relation between the gas proportional valve opening increment and the outlet water temperature increment is established. And after the control device determines the difference between the water temperature and the set outlet water temperature, the opening of the gas proportional valve is adjusted according to the actual difference. It can be understood that the corresponding relationship between the opening increment of the gas proportional valve and the outlet water temperature increment is changed by the size of the gas pipeline and the amount of water to be heated. Taking increasing the opening increment of the gas proportional valve by 1 degree and increasing the outlet water temperature by 1 degree as an example, if the actual outlet water temperature is detected to exceed the set outlet water temperature by 10 ℃, the control device can reduce the gas flow of the gas wall-mounted boiler by reducing the opening of the gas proportional valve by 5 degrees to about 10 degrees, so as to reduce the actual outlet water temperature, and enable the difference between the actual outlet water temperature and the set outlet water temperature to be less than 5 ℃; on the contrary, if the actual outlet water temperature is lower than the set outlet water temperature by 10 ℃, the control device can increase the opening of the gas proportional valve by 5 degrees to about 10 degrees, so that the gas flow of the gas wall-mounted boiler is increased, and the actual outlet water temperature is increased to enable the difference value between the actual outlet water temperature and the set outlet water temperature to be less than 5 ℃.
In the embodiment, the opening of the gas proportional valve of the gas wall-mounted furnace is correspondingly controlled according to the difference value between the outlet water temperature and the set outlet water temperature, so that the gas flow of the gas wall-mounted furnace is adjusted, the difference between the actual outlet water temperature and the set outlet water temperature is reduced, and the operation is simple, convenient, accurate and reliable.
Step S130: and correspondingly adjusting the rotating speed of a fan of the gas wall-mounted furnace according to the adjusted gas flow.
After the control device adjusts the gas flow of the wall-mounted gas furnace, the rotating speed of a fan of the wall-mounted gas furnace is correspondingly adjusted, so that the mixture of air and gas is combusted in the optimal state, and the fuel is kept to be fully combusted. Further, in an embodiment, after the step S130, the step S110 is returned to until the outlet water temperature of the gas wall-hanging stove and the set outlet water temperature meet the preset condition.
Specifically, the combustion condition of the wall-mounted gas boiler under different gas flows and fan rotating speeds can be analyzed, and on the premise that sufficient combustion of fuel in a hearth of the wall-mounted gas boiler is ensured, the corresponding relation between the gas flow and the fan rotating speed is counted and stored. When the actual self-adaptive control is carried out, when the actual outlet water temperature is higher than the set outlet water temperature, the opening degree of the gas proportional valve is reduced, otherwise, the opening degree of the gas proportional valve is increased. After the gas flow corresponding to the opening of the gas proportional valve is determined, the rotating speed of the fan is correspondingly adjusted according to the stored corresponding relation between the gas flow and the rotating speed of the fan, the error between the actual water outlet temperature and the set water outlet temperature is in an allowable range through cyclic adjustment, and meanwhile, the wall-mounted gas furnace is in the optimal combustion state, so that the fuel is fully combusted, the combustion temperature is high, the emission of carbon monoxide and nitrogen oxide is reduced, and the energy consumption is saved.
According to the self-adaptive control method of the wall-mounted gas furnace, the water outlet temperature of the wall-mounted gas furnace is monitored, when the water outlet temperature is not consistent with the preset condition with the set water outlet temperature, the air-fuel ratio self-adaptive control is adopted to simultaneously adjust the gas flow and the fan rotating speed of the wall-mounted gas furnace, the fuel is kept fully combusted, accurate temperature control is carried out, and compared with the traditional wall-mounted gas furnace, the control reliability of the wall-mounted gas furnace is improved.
In one embodiment, as shown in fig. 2, the adaptive control method of the wall-mounted gas boiler further includes the step S140: detecting the oxygen content of the flue gas of the gas wall-mounted furnace in real time, and correspondingly adjusting the air supply quantity of the fan according to the oxygen content of the flue gas.
Specifically, step S140 may be executed after the gas flow and the fan speed of the gas wall-mounted boiler are cyclically adjusted according to the outlet water temperature through steps S110 to S130, so that the outlet water temperature and the set outlet water temperature meet preset conditions, and the flue gas oxygen content of the gas wall-mounted boiler is monitored in real time and the air supply amount of the fan is adjusted; step S140 may also be to monitor the oxygen content of the flue gas of the gas wall-hanging furnace in real time and adjust the air output of the fan during the process of adjusting the gas flow and the fan rotation speed of the gas wall-hanging furnace according to the water outlet temperature cycle in steps S110 to S130.
The accessible sets up the oxygen sensor at the exhaust port of gas hanging stove, detects and feeds back to controlling means the flue gas oxygen content in the exhaust flue gas of exhaust port, and controlling means adjusts the air supply volume of fan according to the testing result, ensures that the flue gas oxygen content among the combustion system remains throughout in reasonable interval within range to the increasing of heat efficiency makes the gas more fully burn. For example, the control device analyzes according to the signal fed back by the oxygen sensor, and compares the oxygen content of the flue gas with a pre-stored standard oxygen content value. When the oxygen content in the smoke discharged from the smoke outlet is too high, the air output of the fan is reduced; otherwise, the air supply amount is increased so that the fuel in the hearth is fully combusted to reach the emission standard.
It should be understood that although the various steps in the flow charts of fig. 1-2 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-2 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, there is provided a control device comprising a memory and a processor, the memory having stored therein a computer program that when executed by the processor performs the steps of: acquiring the outlet water temperature of the gas wall-mounted boiler; when the water outlet temperature and the set water outlet temperature do not accord with preset conditions, adjusting the gas flow of the gas wall-mounted boiler; and correspondingly adjusting the rotating speed of a fan of the gas wall-mounted furnace according to the adjusted gas flow.
In one embodiment, the processor, when executing the computer program, further performs the steps of: receiving the outlet water temperature sent by the temperature detection device; the temperature detection device is arranged on a water outlet pipe of the gas wall-mounted furnace.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and correspondingly controlling the opening of a gas proportional valve of the gas wall-mounted furnace according to the difference value between the outlet water temperature and the set outlet water temperature, so as to adjust the gas flow of the gas wall-mounted furnace.
In one embodiment, the processor, when executing the computer program, further performs the steps of: detecting the oxygen content of the flue gas of the gas wall-mounted furnace in real time, and correspondingly adjusting the air supply quantity of the fan according to the oxygen content of the flue gas.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of: acquiring the outlet water temperature of the gas wall-mounted boiler; when the water outlet temperature and the set water outlet temperature do not accord with preset conditions, adjusting the gas flow of the gas wall-mounted boiler; and correspondingly adjusting the rotating speed of a fan of the gas wall-mounted furnace according to the adjusted gas flow.
In one embodiment, the computer program when executed by the processor further performs the steps of: receiving the outlet water temperature sent by the temperature detection device; the temperature detection device is arranged on a water outlet pipe of the gas wall-mounted furnace.
In one embodiment, the computer program when executed by the processor further performs the steps of: and correspondingly controlling the opening of a gas proportional valve of the gas wall-mounted furnace according to the difference value between the outlet water temperature and the set outlet water temperature, so as to adjust the gas flow of the gas wall-mounted furnace.
In one embodiment, the computer program when executed by the processor further performs the steps of: detecting the oxygen content of the flue gas of the gas wall-mounted furnace in real time, and correspondingly adjusting the air supply quantity of the fan according to the oxygen content of the flue gas.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
In an embodiment, there is further provided a self-adaptive control device for a wall-mounted gas boiler, as shown in fig. 3, including a temperature detection device 110 and a control device 120, where the temperature detection device 110 is disposed on a water outlet pipe of the wall-mounted gas boiler, the control device 120 is connected to the temperature detection device 110, and the control device 120 is configured to perform heating control according to the above-mentioned method. The temperature detecting device 110 may be a thermometer or a temperature sensor. The temperature detection device 110 can be arranged inside or outside the water outlet pipe of the wall-mounted gas boiler to monitor the water outlet temperature of the wall-mounted gas boiler, and the wall-mounted gas boiler is simple, convenient and reliable to operate. In one embodiment, the temperature sensing device 110 is a thermometer. In addition, the control device may employ a controller such as an MCU. The control device 120 may be an independent controller or an original controller of the gas wall-hanging stove.
Further, in an embodiment, as shown in fig. 4, the adaptive control device for the wall-mounted gas furnace further includes an oxygen sensor 130 connected to the control device 120, and the oxygen sensor 130 is disposed at a smoke outlet of the wall-mounted gas furnace.
The user can set up the leaving water temperature through button or touch screen after opening gas hanging stove, and controlling means preserves as setting for leaving water temperature with the temperature of user input. When actual adaptive control is performed, the control device 120 compares the obtained outlet water temperature of the gas wall-hanging stove with the stored set outlet water temperature, adjusts the gas flow of the gas wall-hanging stove if the outlet water temperature and the set outlet water temperature do not meet the preset condition, and reduces the difference between the actual outlet water temperature and the set outlet water temperature by increasing or reducing the gas flow of the gas wall-hanging stove, so that the actual outlet water temperature and the set outlet water temperature meet the preset condition.
Specifically, when the actual outlet water temperature is higher than the set outlet water temperature, the control device 120 decreases the opening degree of the gas proportional valve, and otherwise, increases the opening degree of the gas proportional valve. Taking increasing the opening increment of the gas proportional valve by 1 degree and increasing the outlet water temperature by 1 degree as an example, if the actual outlet water temperature is detected to exceed the set outlet water temperature by 10 ℃, the control device can reduce the gas flow of the gas wall-mounted boiler by reducing the opening of the gas proportional valve by 5 degrees to about 10 degrees, so as to reduce the actual outlet water temperature, and enable the difference between the actual outlet water temperature and the set outlet water temperature to be less than 5 ℃; on the contrary, if the actual outlet water temperature is lower than the set outlet water temperature by 10 ℃, the control device can increase the opening of the gas proportional valve by 5 degrees to about 10 degrees, so that the gas flow of the gas wall-mounted boiler is increased, and the actual outlet water temperature is increased to enable the difference value between the actual outlet water temperature and the set outlet water temperature to be less than 5 ℃.
After the gas flow corresponding to the opening of the gas proportional valve is determined, the rotating speed of the fan is correspondingly adjusted according to the stored corresponding relation between the gas flow and the rotating speed of the fan, the error between the actual water outlet temperature and the set water outlet temperature is in an allowable range through cyclic adjustment, and meanwhile, the wall-mounted gas furnace is in the optimal combustion state, so that the fuel is fully combusted, the combustion temperature is high, the emission of carbon monoxide and nitrogen oxide is reduced, and the energy consumption is saved.
In addition, the oxygen sensor 130 is arranged at the smoke outlet of the wall-mounted gas furnace, the oxygen content of the smoke in the smoke exhausted from the smoke outlet is detected and fed back to the control device 120, the control device 120 adjusts the air supply quantity of the fan according to the detection result, and the oxygen content of the smoke in the combustion system is ensured to be kept in a reasonable interval range all the time, so that the heat efficiency is improved, and the gas is combusted more fully. For example, the control device 120 analyzes the signal fed back by the oxygen sensor 130, and compares the oxygen content of the flue gas with a pre-stored standard value of the oxygen content. When the oxygen content in the smoke discharged from the smoke outlet is too high, the air output of the fan is reduced; otherwise, the air supply amount is increased so that the fuel in the hearth is fully combusted to reach the emission standard.
Above-mentioned hanging stove self-adaptation controlgear of gas, through the leaving water temperature of monitoring the hanging stove of gas, when leaving water temperature and setting for the leaving water temperature and not conform to the preset condition, adopt air-fuel ratio self-adaptation control to adjust the gas flow and the fan rotational speed of the hanging stove of gas simultaneously, it is abundant to keep the burning of fuel, carries out accurate accuse temperature, compares with traditional hanging stove of gas, has improved the control reliability of hanging stove of gas.
In one embodiment, a wall-mounted gas stove system is further provided and comprises the wall-mounted gas stove and the wall-mounted gas stove self-adaptive control device. Wherein, gas hanging stove includes inlet tube, outlet pipe, furnace, gas pipe, gas proportional valve and fan, and the gas proportional valve sets up in the gas pipeline, and the control lets in the gas flow in furnace, and the fan changes the amount of wind of sending into furnace through the wind speed regulation, and the inlet tube is used for inserting cold water, and hot tap can be connected to the outlet pipe. When the heating function is started by a user or the hot water faucet is started, the controller controls the gas wall to ignite the gas in the hearth to heat the cold water accessed by the water inlet pipe, and the heated hot water is output to the hot water faucet through the water outlet pipe for the user to use.
The user can set up the leaving water temperature through button or touch screen after opening gas hanging stove, and controlling means preserves as setting for leaving water temperature with the temperature of user input. When actual self-adaptive control is carried out, the control device compares the obtained outlet water temperature of the gas wall-mounted boiler with the stored set outlet water temperature, and when the actual outlet water temperature is higher than the set outlet water temperature, the control device reduces the opening of the gas proportional valve, otherwise, the opening of the gas proportional valve is increased. According to the stored corresponding relation between the gas flow and the fan rotating speed, after the gas flow corresponding to the opening degree of the gas proportional valve is determined, the rotating speed of the fan is correspondingly adjusted, the actual water outlet temperature and the set water outlet temperature are within the allowable range through cyclic adjustment, meanwhile, the wall-mounted gas furnace is in the optimal combustion state, the fuel is fully combusted, the combustion temperature is high, the emission of carbon monoxide and nitrogen oxide is reduced, and the energy consumption is saved.
Furthermore, an oxygen sensor is arranged at an exhaust port of the gas wall-mounted furnace, the oxygen content of the flue gas in the flue gas exhausted from the exhaust port is detected and fed back to the control device, the control device adjusts the air supply quantity of the fan according to the detection result, and the oxygen content of the flue gas in the combustion system is ensured to be kept in a reasonable interval range all the time, so that the heat efficiency is improved, and the gas is combusted more fully. For example, the control device analyzes according to the signal fed back by the oxygen sensor, and compares the oxygen content of the flue gas with a pre-stored standard oxygen content value. When the oxygen content in the smoke discharged from the smoke outlet is too high, the air output of the fan is reduced; otherwise, the air supply amount is increased so that the fuel in the hearth is fully combusted to reach the emission standard.
Above-mentioned gas hanging stove system through the leaving water temperature of monitoring gas hanging stove, when leaving water temperature and setting for the leaving water temperature and not conform to the preset condition, adopts air-fuel ratio adaptive control to adjust the gas flow and the fan rotational speed of gas hanging stove simultaneously, keeps the burning of fuel abundant, carries out accurate accuse temperature, compares with traditional gas hanging stove, has improved the control reliability of gas hanging stove.
In order to better understand the self-adaptive control method and device for the wall-mounted gas boiler and the wall-mounted gas boiler system, the following detailed explanation is provided with reference to specific embodiments.
Because the gas compositions and the gas heat values of different regions are different, the gas heat values are influenced even at different temperatures, altitudes, seasons and gas sources, so that the difference of the gas heat values is larger, the working environment of the wall-mounted furnace is more complex, the factors greatly limit the combustion working condition of the fuel, and the good experience of the user comfort is influenced. If the wall-mounted boiler is to cover all areas, the requirements on hardware and programs of products are very high. The traditional wall-mounted gas furnace adopts combustion parameters set in a factory test to perform combustion control, often cannot meet the requirements of most users in most areas, cannot provide a targeted optimal combustion control scheme for each user, so that a mixture of air and gas cannot be combusted in an optimal state, and a plurality of problems easily occur in the working process of a combustor, such as reduction of thermal efficiency, abnormal combustion sound, increase of harmful smoke emission, insufficient combustion and the like in the combustion process.
Based on the self-adaptive control method, the self-adaptive control method for the wall-mounted gas furnace system can achieve better performance of automatically adjusting air-fuel ratio. The technical problem of optimal combustion of the wall-mounted gas boiler can be solved; the air-fuel ratio self-adaptive control system has the functions of keeping the fuel fully combusted and accurately controlling the temperature by automatically adjusting the air supply quantity and the air input quantity. The combustion control method that this application adopted makes hanging stove automatically regulated air-fuel ratio under the combustion condition of difference, reaches an optimum combustion state, has improved user's use and has experienced to make fuel realize abundant burning, the combustion temperature is high, the function of automatically regulated air-fuel ratio, reduced carbon monoxide, nitrogen oxide's emission simultaneously, the energy saving consumption.
Specifically, the self-adaptive control method of the wall-mounted gas furnace system provided by the application utilizes the automatic adjustment of the air-fuel ratio realized by mutually matching the fan and the gas proportional valve, so that the oxygen content of smoke in the combustion system is always kept in a reasonable interval range, the heat efficiency is improved, and the gas is more sufficiently combusted. As shown in fig. 5, the method is implemented by the following steps.
The method comprises the following steps: the required temperature is set by a user, after a set temperature signal is transmitted to the controller, the outlet water temperature on the outlet pipe of the gas wall-mounted furnace is detected through the thermometer, and if the difference between the detected outlet water temperature and the set temperature exceeds 5 ℃, temperature adjustment is needed. The identification of the outlet water temperature requires that a thermometer for detecting the temperature of the water is arranged on the outlet pipe, and a temperature signal is sent to the controller. And after receiving the required temperature set by the user, the controller judges whether the outlet water temperature meets the requirement that the difference value between the outlet water temperature and the temperature set by the user is between 5 ℃ or not by combining the actual outlet water temperature collected by the thermometer, and correspondingly sends a signal execution instruction.
Step two: the outlet water temperature is adjusted, and the combustion load is adjusted through the action of the fan and the gas proportional valve, so that the outlet water temperature is controlled, and the temperature requirement set by a user is met. The fan is a variable-frequency adjustable fan, and the rotating speed of the fan can be changed according to signals given by the controller, so that the air supply quantity is adjusted. The rotating speed of the fan is in direct relation with the opening of the gas proportional valve, the opening of the gas proportional valve influences the gas flow, and the gas flow influences the combustion condition. When the air conditioner is used for adjusting, the controller firstly sends an opening adjusting signal to the gas proportional valve according to the difference value between the actual water outlet temperature and the set water outlet temperature to change the gas flow, the change of the gas flow influences the oxygen content required by combustion, and the controller changes the rotating speed of the fan according to the change of the gas flow. In the control process, the corresponding relation between the gas flow and the rotating speed of the fan is established in advance, when the actual outlet water temperature is higher than the set temperature, the controller reduces the opening degree of the gas proportional valve, otherwise, the opening degree of the gas proportional valve is increased. And determining the gas flow corresponding to the opening degree of the gas proportional valve, correspondingly adjusting the rotating speed of the fan by the controller, and circularly adjusting to enable the error between the actual outlet water temperature and the set temperature to be within an allowable range.
Step three: the controller monitors the water outlet temperature and the oxygen content of the flue gas generated by combustion in real time and makes corresponding judgment. The controller detects whether the water temperature reaches the required temperature set by the user and does not meet the requirement of re-entering circulation until the temperature reaches the required temperature of the user. The rotating speed of the fan is judged to be in accordance with the requirement by monitoring the oxygen content in the flue gas in real time, wherein the monitoring of the oxygen content in the flue gas can be realized by installing an oxygen sensor for monitoring the oxygen content at the smoke outlet of the gas wall-hanging furnace in advance, the oxygen sensor transmits a detected signal to the controller, the controller judges whether the signal is in accordance with the requirement, and the air supply quantity of the fan is changed if the signal is not in accordance with the requirement. The controller judges according to the signal transmitted by the oxygen sensor, reduces the air supply quantity of the fan when the oxygen content is too high, and increases the air supply quantity to enable the fuel in the hearth to be fully combusted to reach the emission standard otherwise.
When the wall-mounted boiler is used, a user adjusts the required temperature, the controller can change the opening degree of the gas proportional valve, and then the rotating speed of the fan is controlled to change. Through the monitoring of the oxygen sensor, the rotating speed of the fan reaches the optimal rotating speed, the problem of insufficient combustion of fuel is solved, the energy waste is reduced, automatic adjustment is realized in the control process, and the combustion efficiency is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A self-adaptive control method for a wall-mounted gas boiler is characterized by comprising the following steps:
acquiring the outlet water temperature of the gas wall-mounted boiler;
when the water outlet temperature and the set water outlet temperature do not accord with preset conditions, adjusting the gas flow of the gas wall-mounted boiler;
and correspondingly adjusting the rotating speed of a fan of the gas wall-mounted furnace according to the adjusted gas flow.
2. The self-adaptive control method for the wall-hanging gas stove according to claim 1, wherein the preset conditions comprise: the difference value between the water outlet temperature and the set water outlet temperature is smaller than the set temperature threshold value.
3. The self-adaptive control method for the wall-mounted gas boiler according to claim 1, wherein the step of obtaining the outlet water temperature of the wall-mounted gas boiler comprises the following steps: receiving the outlet water temperature sent by the temperature detection device; the temperature detection device is arranged on a water outlet pipe of the gas wall-mounted furnace.
4. The self-adaptive control method for the gas wall-hanging stove according to claim 1, wherein the adjusting of the gas flow of the gas wall-hanging stove comprises: and correspondingly controlling the opening of a gas proportional valve of the gas wall-mounted furnace according to the difference value between the outlet water temperature and the set outlet water temperature, so as to adjust the gas flow of the gas wall-mounted furnace.
5. The self-adaptive control method for the wall-mounted gas boiler according to claim 1, wherein the acquired outlet water temperature of the wall-mounted gas boiler is returned after the rotating speed of the fan of the wall-mounted gas boiler is correspondingly adjusted according to the adjusted gas flow until the outlet water temperature of the wall-mounted gas boiler and the set outlet water temperature meet preset conditions.
6. The self-adaptive control method for the wall-hanging gas stove according to claim 1, further comprising:
detecting the oxygen content of the flue gas of the gas wall-mounted furnace in real time, and correspondingly adjusting the air supply quantity of the fan according to the oxygen content of the flue gas.
7. A self-adaptive control device of a wall-mounted gas stove, which is characterized by comprising a temperature detection device and a control device, wherein the temperature detection device is arranged on a water outlet pipe of the wall-mounted gas stove, the control device is connected with the temperature detection device, and the control device is used for heating control according to the method of any one of claims 1 to 6.
8. The adaptive control device for the gas wall-hanging stove according to claim 7, characterized in that the temperature detection device is a thermometer.
9. The self-adaptive control device for the wall-mounted gas furnace according to claim 7, further comprising an oxygen sensor connected with the control device, wherein the oxygen sensor is arranged at a smoke outlet of the wall-mounted gas furnace.
10. A gas wall-hanging stove system comprising a gas wall-hanging stove and the gas wall-hanging stove adaptive control device of any one of claims 7 to 9.
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| CN113883589A (en) * | 2021-10-20 | 2022-01-04 | 珠海格力电器股份有限公司 | Heating control method and device and wall-hanging furnace system |
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Application publication date: 20200825 |