An ignition control method for a plate heat exchanger product of a wall-mounted boiler

Abstract

The present invention discloses a method for controlling ignition of a plate heat exchanger product of a wall-mounted boiler, comprising the following steps: S1, detecting a flowing water signal through a water flow sensor; S2, the control board controls the blower and the heating water pump to start simultaneously; S3, detecting the air pressure of the blower through an air pressure switch; S4, the control board controls the water flow sensor to close, and at the same time, the control board controls the pulse igniter to start; S5, the control board controls the proportional valve to start releasing gas; S6, after the pulse igniter reaches the preset ignition time, the control board restarts the water flow sensor, and the water flow sensor starts; S7, if the water flow sensor detects a water flow signal, the controller controls the proportional valve to maintain the open and closed state, and if the water flow sensor does not detect a water flow signal, the controller controls the proportional valve to close. The structure of the present invention is reasonable, which solves the interference to the water flow signal during the discharge of the wall-mounted boiler, thereby improving the reliability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of wall-mounted boilers, and particularly relates to a method for controlling ignition of a plate heat exchanger product of a wall-mounted boiler. Background Art

[0002] Currently, most wall-mounted boilers use high-voltage pulse ignition. When high-voltage ignition occurs, the spark voltage can reach 10,000 volts. The pulsed high-voltage circuit has a great impact on the operation of the circuit. In order to make the circuit work properly, various hardware circuits are used for level isolation to enhance the anti-interference ability of the circuit; in the wall-mounted boiler circuit, various hardware circuits are used for level isolation, but during high-voltage discharge, it still interferes with the water flow signal, and in severe cases, the control board cannot detect the water flow signal.

[0003] If the high-voltage pulse causes a large interference to the water flow signal and exceeds the set value, the controller determines that there is no water flow signal and no ignition action is performed. However, after the ignition action stops, if there is still a water flow signal, the ignition action will be restarted, which may potentially enter an infinite loop. A solution is proposed for the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for controlling ignition of a plate heat exchanger product of a wall-mounted boiler, which solves the interference to the water flow signal during the discharge of the wall-mounted boiler, thereby improving the reliability of the product.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions:

[0006] A method for controlling ignition of a plate heat exchanger product of a wall-mounted boiler includes the following steps:

[0007] S1. Detect the flowing water signal through a water flow sensor, and transmit the detected signal to the control board;

[0008] S2. When the water flow sensor detects that the water flow signal is greater than the preset time, the control board controls the fan and the heating water pump to start simultaneously;

[0009] S3. Detect the air pressure of the fan through an air pressure switch, and after the air pressure switch is closed, transmit the signal to the control board;

[0010] S4. After the control board receives the signal from the air pressure switch, the control board controls the water flow sensor to close, the water flow sensor no longer monitors the water flow signal, and at the same time, the control board controls the pulse igniter to start, and the pulse igniter performs pulse ignition according to the preset time;

[0011] S5. After the pulse igniter is started, the control board controls the proportional valve to start releasing gas;

[0012] S6. After the pulse igniter reaches the preset ignition time, it feeds back a signal to the control board, and the control board restarts the water flow sensor, and the water flow sensor starts.

[0013] S7. If the water flow sensor detects a water flow signal, it feeds back to the controller, and the controller controls the proportional valve to maintain the open and closed state. If the water flow sensor does not detect a water flow signal, it feeds back to the controller, and the controller controls the proportional valve to close.

[0014] Preferably, the preset time of the water flow sensor in S2 is 0.5 seconds.

[0015] Preferably, the pulse igniter in S4 starts within 0.2 seconds after the control board detects the air pressure signal.

[0016] Preferably, the ignition action of the pulse igniter in S4 lasts for 5 seconds.

[0017] Preferably, the action time of the air pressure switch in S3 is 0.2 seconds.

[0018] Preferably, the proportional valve starts 0.5 seconds after the pulse igniter starts in S1.

[0019] Beneficial effects: In this application, the water flow is detected by the water flow sensor. When the water flow sensor acts, it transmits a signal to the control board, and the control board will control the fan and the heating water pump to drive simultaneously. The action of the fan is detected by the air pressure switch, and the signal of the air pressure switch will be transmitted to the control board, and the control board controls the pulse igniter to start. At the same time, the control board will cancel the detection of the water flow by the water flow sensor. If the user closes the water source during the ignition of the pulse igniter, the water flow signal proceeds at the frequency before the pulse igniter ignites, and the water flow sensor is still in the state of having water flow through until the ignition action is completed. Since the bathroom heat exchange of the wall-mounted boiler plate heat exchanger product is indirectly heated through a small cycle, the successful ignition and combustion during ignition have no impact on the product, and there is no dry burning situation. After ignition is completed, the control board resumes the detection of the water flow by the water flow sensor, re-detects the water flow through the water flow sensor, and feeds back to the control board through the water flow sensor. If there is water flow, it maintains the combustion state. If there is no water flow, it closes the proportional valve. By using this type of ignition method, it is possible to avoid the influence of the high voltage during the ignition of the pulse igniter on the circuit control and avoid entering an endless loop. Specific embodiments

[0020] The following are only the preferred embodiments of the present invention, and the protection scope is not limited to this embodiment. Any technical solutions falling within the idea of the present invention shall belong to the protection scope of the present invention. At the same time, it should be pointed out that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0021] An ignition control method for a plate heat exchanger product of a wall-mounted boiler, comprising the following steps:

[0022] S1. Detect the flowing water signal through a water flow sensor, and transmit the detected signal to the control board;

[0023] S2. When the water flow sensor detects that the water flow signal is greater than 0.5 seconds, the control board controls the fan and the heating water pump to start simultaneously;

[0024] S3. Detect the air pressure of the fan through an air pressure switch. The air pressure switch closes within 0.2 seconds after detecting the air pressure, and transmits the signal to the control board;

[0025] S4. Within 0.2 seconds after the control board receives the signal from the air pressure switch, the control board controls the water flow sensor to close. The water flow sensor no longer monitors the water flow signal. At the same time, the control board controls the pulse igniter to start, and the pulse igniter continuously performs pulse ignition within 5 seconds;

[0026] S5. 0.5 seconds after the pulse igniter starts, the control board controls the proportional valve to start releasing gas;

[0027] S6. After the pulse igniter reaches the ignition time of 5 seconds, it feeds back a signal to the control board, and the control board restarts the water flow sensor, and the water flow sensor starts;

[0028] S7. If the water flow sensor detects a water flow signal, the water flow sensor feeds back to the controller, and the controller controls the proportional valve to maintain the open and closed state. If the water flow sensor does not detect a water flow signal, the water flow sensor feeds back to the controller, and the controller controls the proportional valve to close.

[0029] In this application, the water flow is detected through a water flow sensor. When the water flow sensor acts, it transmits a signal to the control board. The control board will control the fan and the heating water pump to drive simultaneously. The action of the fan is detected through an air pressure switch, and the signal of the air pressure switch will be transmitted to the control board. The control board controls the pulse igniter to start. At the same time, the control board will cancel the detection of the water flow by the water flow sensor. If the user closes the water source during the ignition of the pulse igniter, the water flow signal is in the frequency before the pulse igniter ignites, and the water flow sensor is still in the state of having water flow through until the ignition action is completed. Because the bathroom heat exchange of the wall-mounted boiler plate heat exchanger product is indirectly heated through a small cycle, so the successful ignition and combustion during ignition has no impact on the product, and there is no dry burning situation. After ignition is completed, the control board resumes the detection of the water flow by the water flow sensor, re-detects the water flow through the water flow sensor, and feeds back to the control board through the water flow sensor. If there is water flow, the combustion state is maintained. If there is no water flow, the proportional valve is closed. Using this type of ignition method can avoid the influence of the high voltage during the ignition of the pulse igniter on the circuit control and avoid entering an infinite loop.

Claims

1. A method for controlling ignition of a plate heat exchanger product of a wall-mounted boiler, characterized in that, It includes the following steps: S1. Detect the flowing water signal through a water flow sensor and transmit the detected signal to the control board; S2. When the water flow sensor detects that the water flow signal is greater than the preset time, the control board controls the fan and the heating water pump to start simultaneously; S3. Detect the air pressure of the fan through an air pressure switch, and after the air pressure switch closes, transmit the signal to the control board; S4. Within 0.2 seconds after the control board receives the signal from the air pressure switch, the control board controls the water flow sensor to close, and the water flow sensor no longer monitors the water flow signal. At the same time, the control board controls the pulse igniter to start, and the pulse igniter continuously performs pulse ignition within 5 seconds; S5. After the pulse igniter starts, the control board controls the proportional valve to start bleeding air; S6. After the pulse igniter reaches the preset ignition time, it feeds back a signal to the control board, and the control board restarts the water flow sensor, and the water flow sensor starts; S7. If the water flow sensor detects a water flow signal, the water flow sensor feeds back to the controller, and the controller controls the proportional valve to maintain the open / closed state. If the water flow sensor does not detect a water flow signal, the water flow sensor feeds back to the controller, and the controller controls the proportional valve to close.

2. The ignition control method of a wall-mounted boiler plate heat exchanger product according to claim 1, characterized in that The preset time of the water flow sensor in S2 is 0.5 seconds.

3. A method for controlling ignition of a plate heat exchanger product of a wall-mounted boiler according to claim 1, characterized in that, The action time of the air pressure switch in S3 is 0.2 seconds.

4. A method for controlling ignition of a plate heat exchanger product of a wall-mounted boiler according to claim 1, characterized in that, In S1, the proportional valve starts 0.5 seconds after the pulse igniter starts.