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CN-114763911-B - Control method of gas wall-mounted furnace and gas wall-mounted furnace adopting control method

CN114763911BCN 114763911 BCN114763911 BCN 114763911BCN-114763911-B

Abstract

The application discloses a control method of a gas wall-mounted furnace, which comprises a wind pressure switch, a voltage sensor and a fan, wherein the fan has at least two operation states, the wind pressure switch is configured to sense wind pressure of the fan, the voltage sensor is configured to sense voltage of the fan, the control method comprises the following steps that the fan operates at a pre-cleaning speed and enters a first monitoring mode in a starting stage of the gas wall-mounted furnace, and enters a second monitoring mode after confirming that the gas wall-mounted furnace is suitable to enter a continuous operation stage, wherein only information of the wind pressure switch is monitored in the first monitoring mode, and information of the wind pressure switch or information of the voltage sensor is monitored according to the operation state of the fan in the second monitoring mode. The application also discloses a gas wall-mounted furnace adopting the control method. The application can ensure the safe operation of the gas wall-mounted furnace under the condition that the fans have different operation states.

Inventors

  • Sun Chenhuan

Assignees

  • 博世热力技术（上海）有限公司

Dates

Publication Date
20260505
Application Date
20210113

Claims (9)

  1. 1. A gas wall-hanging stove control method, the gas wall-hanging stove comprising a wind pressure switch (100), a voltage sensor (500) and a fan (200), wherein the fan (200) has at least two operation states, the wind pressure switch (100) is configured to sense wind pressure of the fan (200), the voltage sensor (500) is configured to sense voltage of the fan (200), characterized in that the control method comprises the steps of: In the starting stage of the gas wall-hanging stove, the fan (200) operates at a pre-cleaning speed and enters a first monitoring mode, and After confirming that the gas wall-mounted furnace is suitable for entering a continuous operation stage, entering a second monitoring mode; wherein only information of the wind pressure switch (100) is monitored in the first monitoring mode, and information of the wind pressure switch (100) or information of the voltage sensor (500) is monitored according to an operation state of the blower (200) in the second monitoring mode; Wherein the at least two operating conditions of the fan (200) comprise a first operating condition and a second operating condition, wherein the operating speed of the fan (200) in the first operating condition is greater than the operating speed of the fan (200) in the second operating condition, and Wherein, the information of the wind pressure switch (100) is adopted in the first operation state, and the information of the voltage sensor (500) is adopted in the second operation state to control the operation of the gas wall-mounted boiler.
  2. 2. The gas wall-hanging stove control method according to claim 1, characterized in that when the fan (200) is confirmed to operate in the first operation state, according to the monitored information of the wind pressure switch (100), if the real-time wind pressure value (P0) of the wind pressure switch (100) is smaller than the opening wind pressure value (P2) of the wind pressure switch (100), the operation duration of the fan (200) is started to be recorded, and if the real-time wind pressure value (P0) is also smaller than or equal to the closing wind pressure value (P1) of the wind pressure switch (100), and the operation duration of the fan (200) is longer than or equal to the second preset duration (T2), an error is prompted and the gas wall-hanging stove is shut down, otherwise, the second monitoring mode is continued until the heat utilization requirement is ended.
  3. 3. The gas wall-hanging stove control method according to claim 2, characterized in that when the fan (200) is confirmed to operate in the second operation state, according to the monitored information of the voltage sensor (500), if the real-time voltage value (V0) of the fan (200) sensed by the voltage sensor (500) is smaller than the off-voltage value (V2) of the fan (200), the operation duration of the fan (200) is started to be recorded, and if the real-time voltage value (V0) is also smaller than or equal to the on-voltage value (V1) of the fan (200), and the operation duration of the fan (200) is larger than or equal to a third preset duration (T3), an error is prompted and the gas wall-hanging stove is shut down, otherwise, the second monitoring mode is continued until the heat consumption requirement is ended.
  4. 4. The gas wall-hanging stove control method according to claim 1, further comprising the step of confirming that the state of the wind pressure switch (100) is normal before the fan (200) is operated at a pre-cleaning speed and enters a first monitoring mode.
  5. 5. The gas wall-hanging stove control method according to claim 4, wherein the mode of confirming that the state of the wind pressure switch (100) is normal is to detect that the wind pressure switch (100) is turned off.
  6. 6. The gas wall-hanging stove control method according to claim 1, wherein the method for confirming that the gas wall-hanging stove is suitable for entering a continuous operation stage comprises: comparing a real-time wind pressure value (P0) of the wind pressure switch (100) with a closed wind pressure value (P1) of the wind pressure switch (100) according to the monitored information of the wind pressure switch (100); and if the real-time wind pressure value (P0) is larger than the closed wind pressure value (P1), confirming that the gas wall-mounted furnace is suitable for entering a continuous operation stage.
  7. 7. The gas wall-hanging stove control method according to claim 6, characterized in that after the fan (200) is operated at a pre-cleaning speed and enters a first monitoring mode, recording of the operation duration of the fan (200) is started; If the real-time wind pressure value (P0) is smaller than or equal to the closed wind pressure value (P1), and the running time length of the fan (200) is longer than or equal to a first preset time length (T1), prompting an error and shutting down the gas wall-mounted furnace.
  8. 8. The method for controlling a gas wall-hanging stove according to claim 1, further comprising an ignition step after confirming that the gas wall-hanging stove is suitable for entering a continuous operation stage and before entering the second monitoring mode, wherein the ignition step comprises the step of operating the fan (200) at an ignition speed.
  9. 9. A gas wall-hanging stove comprising: A fan (200) having at least two operating states; a wind pressure switch (100) for sensing a wind pressure of the blower (200); a speed sensor (300) for sensing an operating speed of the blower (200); The wall-mounted gas boiler is characterized by further comprising: a voltage sensor (500) for sensing the voltage of the wind turbine (200), and -A control unit (400), the control unit (400) being electrically coupled with the wind pressure switch (100), the wind turbine (200), the speed sensor (300) and the voltage sensor (500), wherein the control unit (400) is configured to perform the gas wall-hanging stove control method according to any one of claims 1 to 8.

Description

Control method of gas wall-mounted furnace and gas wall-mounted furnace adopting control method Technical Field The application relates to the technical field of gas wall-mounted furnaces, in particular to a gas wall-mounted furnace control method for fans with different running states and a gas wall-mounted furnace adopting the control method. Background The wind pressure switch assembly in the conventional gas wall-hanging boiler generally includes only one wind pressure switch (APS) having a set of an open wind pressure value and a closed wind pressure value (i.e., ON/OFF point), and is turned ON when the wind pressure generated by the fan is greater than the closed wind pressure value, and is turned OFF when the wind pressure is less than or equal to the open wind pressure value. The set of open and closed wind pressure values can only correspond to one operating state of the fan, i.e. one continuous operating speed V. In the prior art, when the speed of a fan is gradually increased to a continuous operation speed V in the starting stage of the gas wall-mounted furnace, the wind pressure in the wind pressure switch reaches a closed wind pressure value, so that the wind pressure switch is closed to cause a control unit to start the gas wall-mounted furnace to operate, and when the fan is stopped accidentally, the rotating speed is reduced or an air inlet and outlet channel is blocked to cause insufficient air displacement or insufficient air quantity or incapacity of exhausting in the continuous operation stage of the gas wall-mounted furnace, the wind pressure in the wind pressure switch is gradually reduced to an open wind pressure value, so that the wind pressure switch is opened to cause the control unit to stop the gas wall-mounted furnace, thereby avoiding the increase of indoor carbon monoxide concentration caused by unsmooth exhausting and threatening the personal safety of a user. However, the wind pressure switch assembly is only suitable for the case that the fan of the gas wall-mounted boiler has one operation state. With the development of the related art of the gas wall-hanging stove, in order to improve the light load efficiency thereof or to perform the sectional combustion control thereof, it may be required that the fan continuously operates in different states (e.g., at different continuous operation speeds or speed ranges) under different conditions. At this time, because the wind pressures in the wind pressure switches are different under different operation states, the use safety of the gas wall-mounted boiler under different operation states cannot be ensured by a group of opening wind pressure values and closing wind pressure values of the wind pressure switches in the existing design. Therefore, a gas wall-hanging stove control method suitable for fans with various running states is needed, and a gas wall-hanging stove adopting the control method. Disclosure of Invention The application aims to overcome the defects of the prior art and provide a gas wall-mounted furnace control method with at least two running states for a fan and a gas wall-mounted furnace adopting the control method, which can effectively control and monitor the safe operation of the gas wall-mounted furnace. To this end, according to an aspect of the present application, there is provided a gas wall-hanging stove control method including a wind pressure switch configured to sense a wind pressure of a fan, a voltage sensor configured to sense a voltage of the fan, and a fan having at least two operation states, wherein the control method includes the steps of, during a start-up phase of the gas wall-hanging stove, the fan operating at a pre-sweeping speed and entering a first monitoring mode, and entering a second monitoring mode after confirming that the gas wall-hanging stove is suitable for entering a continuous operation phase, wherein only information of the wind pressure switch is monitored in the first monitoring mode, and information of the wind pressure switch or information of the voltage sensor is monitored in the second monitoring mode according to the operation state of the fan. According to an exemplary embodiment of the application, the at least two operating states of the fan comprise a first operating state and a second operating state, wherein the operating speed of the fan in the first operating state is greater than the operating speed of the fan in the second operating state. According to an exemplary embodiment of the present application, when the fan is confirmed to operate in the first operation state, according to the monitored information of the wind pressure switch, if the real-time wind pressure value is smaller than the off wind pressure value of the wind pressure switch, the operation duration of the fan starts to be recorded, and if the real-time wind pressure value is also smaller than or equal to the on wind pressure value of the wind pressure switch, and the operation duration