CN112394659A - Fan current detection control method for household appliance - Google Patents

Abstract

A fan current detection control method of a household appliance comprises the following steps: 1) after the household appliance is electrified, the timer is adjusted, the PCB controls the computer board to give a starting signal, and the fan rotates; 2) after the fan rotates, the PCB controls the computer board to detect the current value of the fan and judges whether the current value of the fan meets the requirement of a set value or not; 3) if the current value meets the requirement of a set numerical value, the fan is in a normal operation state, the PCB controls the computer board to control the fan to continue to operate, and gives an instruction of actuation of the relay, the relay actuates to supply power, the temperature controller and the functional switch are adjusted, and the heating component of the household appliance works normally; if the current value does not reach the requirement of the set value, the fan is in an abnormal state, the PCB controls the computer board to control the fan to stop rotating, a fault sound prompt is sent, the relay is disconnected, and the heating component of the household appliance stops working. The fan current detection control method of the household appliance can better protect heating components of the whole machine.

Description

Fan current detection control method for household appliance

Technical Field

The invention relates to the technical field of household appliances, in particular to a fan current detection control method of a household appliance.

Background

Chinese patent document No. CN2936080 discloses a multifunctional smokeless barbecue machine in 2007, 8/22, which includes a base, a first box body and a second box body installed at two ends of the base, an oven located between the first box body and the second box body, and a temperature adjusting device and a temperature limiter for controlling the heating temperature of the electric heating tube, wherein the oven is provided with the electric heating tube, the second box body is provided with a motor, one end of the oven is detachably installed on the first box body, the other end of the oven is detachably installed on the output shaft of the motor in the second box body, and the second box body can be turned outwards. The oven is abnormal protection when a temperature limiter is used for protecting heating elements from failure, but the limit protection often causes the damage of the heating elements and the deformation of appearance pieces, so that the maintenance cost of the whole oven is high, and the whole oven is more likely to be directly scrapped.

Therefore, further improvements are needed.

Disclosure of Invention

The invention aims to provide a fan current detection control method of a household appliance, which can effectively protect heating components, has low maintenance cost and strong practicability and overcomes the defects in the prior art.

The fan current detection control method of the household appliance is designed according to the purpose, and is characterized in that: the method comprises the following steps:

1) after the household appliance is electrified, the timer is adjusted, the PCB controls the computer board to give a starting signal, and the fan rotates;

2) after the fan rotates, the PCB controls the computer board to detect the current value of the fan and judges whether the current value of the fan meets the requirement of a set value or not;

3) if the current value meets the requirement of a set numerical value, the fan is in a normal operation state, the PCB controls the computer board to control the fan to continue to operate, and gives an instruction of actuation of the relay, the relay actuates to supply power, the temperature controller and the functional switch are adjusted, and the heating component of the household appliance works normally; if the current value does not reach the requirement of the set value, the fan is in an abnormal state, the PCB controls the computer board to control the fan to stop rotating, a fault sound prompt is sent, the relay is disconnected, and the heating component of the household appliance stops working.

In the step 1), after the PCB controls the computer board to give out a starting signal, if the current value fed back to the PCB by the fan is lower than the set value requirement, the PCB controls the computer board to give out a fault sound prompt, and the fan is in a disconnected state.

And 3) in the normal operation of the fan, the PCB controls the computer board to detect the current value of the fan at intervals, and judges whether the current value of the fan meets the requirement of a set value.

The PCB control computer board is provided with a control chip for controlling the running of the fan, a detection chip for detecting the current value of the fan and a buzzer for giving out fault sound prompt, and the relay is arranged on the PCB control computer board.

The fan is a direct current fan and is respectively connected with the DC-L port and the DC-N port of the PCB control computer board.

The timer is connected with the L1 port of the PCB control computer board, the L2 port of the PCB control computer board, the temperature controller, the function switch and the heating element are sequentially connected, and the heating element is respectively connected with the temperature limiter and the N1 port of the PCB control computer board.

In order to better protect heating components of the whole machine, the fan current detection control method of the household appliance judges whether the whole machine continues to work or not by detecting the current difference generated when a fan of a key wearing part is damaged, thereby avoiding a series of maintenance costs and scrappings such as damage of the heating components due to overhigh temperature and deformation of an appearance part caused by damage of the fan of the wearing part, and greatly improving the user experience.

Drawings

Fig. 1 is a schematic circuit diagram of an oven according to an embodiment of the present invention.

Fig. 2 is a process schematic diagram of a fan current detection control method according to an embodiment of the present invention.

Detailed Description

The invention is further described with reference to the following figures and examples.

Referring to fig. 1-2, the fan current detection control method for a household appliance, taking an oven as an example, includes the following steps:

1) after the oven is powered on, the timer 1 is adjusted, the PCB controls thecomputer board 2 to give a starting signal, and thefan 8 rotates;

2) after thefan 8 rotates, the PCB controls thecomputer board 2 to detect the current value of thefan 8 and judges whether the current value of thefan 8 meets the requirement of a set value or not;

3) if the current value meets the requirement of the set numerical value, thefan 8 is in a normal operation state, the PCB controls thecomputer board 2 to control thefan 8 to continue to operate, and gives an instruction of attraction of therelay 4, therelay 4 attracts and supplies power, thetemperature controller 10 and thefunction switch 11 are adjusted, and theheating component 12 of the oven normally works; if the current value does not reach the requirement of the set value, thefan 8 is in an abnormal state, the PCBcontrol computer board 2 controls thefan 8 to stop rotating and sends a fault sound prompt, then therelay 4 is controlled to be disconnected, and theheating element 12 of the oven stops working.

After thefan 8 starts, whether the current value of thefan 8 reaches the set value requirement or not is detected, whether thefan 8 normally operates is judged, if thefan 8 normally operates, the PCBcontrol computer board 2 controls theheating element 12 to normally operate, if thefan 8 is abnormal, the PCBcontrol computer board 2 disconnects therelay 4, theheating element 12 of the oven stops operating, and the current detection control method can timely and effectively protect theheating element 12 when thefan 8 is abnormal, and avoids theheating element 12 from being damaged due to extreme protection.

In the step 1), after the PCBcontrol computer board 2 gives a start signal, if the current value fed back to the PCBcontrol computer board 2 by thefan 8 is lower than the set value requirement, the PCBcontrol computer board 2 gives a fault sound prompt, thefan 8 is in a disconnected state, thefan 8 in this situation may be damaged and cannot operate, and theheating component 12 of the oven cannot work.

In the step 3), when thefan 8 normally operates, the PCB controls thecomputer board 2 to detect the current value of thefan 8 at intervals, and judges whether the current value of thefan 8 meets the requirement of a set value. The running state of thefan 8 can be monitored at any time.

The PCBcontrol computer board 2 is provided with acontrol chip 5 for controlling the operation of thefan 8, adetection chip 6 for detecting the current value of thefan 8, abuzzer 3 for giving a fault sound prompt and a directcurrent power supply 7 for supplying power to the PCBcontrol computer board 2, therelay 4 is arranged on the PCBcontrol computer board 2, and thecontrol chip 5 controls the suction and the disconnection of therelay 4.

Thefan 8 is a direct current fan, and thefan 8 is respectively connected with a DC-L port and a DC-N port of the PCBcontrol computer board 2.

The input end of the timer 1 is connected with the live wire access end L, the output end of the timer 1 is connected with the L1 port of the PCBcontrol computer board 2, the L2 port of the PCBcontrol computer board 2, thetemperature controller 10, thefunction switch 11 and theheating element 12 are sequentially connected, theheating element 12 is respectively connected with the output end of thetemperature limiter 9 and the N1 port of the PCBcontrol computer board 2, the input end of thetemperature limiter 9 is connected with the zero line access end N, thetemperature limiter 9 can cut off theheating element 12 when the temperature of theheating element 12 is too high, and thelimiter 9 can play a role in protecting theheating element 12 when the fan current detection control method cannot be executed due to the fault of the PCBcontrol computer board 2.

The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the invention are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is intended to be protected by the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A fan current detection control method of a household appliance is characterized by comprising the following steps: the method comprises the following steps:

1) after the household appliance is electrified, the timer (1) is adjusted, the PCB controls the computer board (2) to give a starting signal, and the fan (8) rotates;

2) after the fan (8) rotates, the PCB controls the computer board (2) to detect the current value of the fan (8), and judges whether the current value of the fan (8) meets the requirement of a set value or not;

3) if the current value meets the requirement of a set numerical value, the fan (8) is in a normal operation state, the PCB control computer board (2) controls the fan (8) to continue to operate and gives an instruction of attraction of the relay (4), the relay (4) attracts and supplies power, the temperature controller (10) and the function switch (11) are adjusted, and the heating component (12) of the household appliance normally works; if the current value does not reach the requirement of the set value, the fan (8) is in an abnormal state, the PCB control computer board (2) controls the fan (8) to stop rotating and sends out a fault sound prompt, the relay (4) is disconnected, and the heating component (12) of the household appliance stops working.

2. The fan current detection control method of a home appliance according to claim 1, characterized in that: in the step 1), after the PCB control computer board (2) gives a starting signal, if the current value fed back to the PCB control computer board (2) by the fan (8) is lower than the set value requirement, the PCB control computer board (2) gives a fault sound prompt, and the fan (8) is in a disconnected state.

3. The fan current detection control method of a home appliance according to claim 1, characterized in that: in the step 3), when the fan (8) normally operates, the PCB controls the computer board (2) to detect the current value of the fan (8) at intervals, and judges whether the current value of the fan (8) meets the requirement of a set value.

4. The fan current detection control method of a home appliance according to claim 1, characterized in that: the PCB control computer board (2) is provided with a control chip (5) for controlling the operation of the fan (8), a detection chip (6) for detecting the current value of the fan (8) and a buzzer (3) for sending fault sound prompt, and the relay (4) is arranged on the PCB control computer board (2).

5. The fan current detection control method of a home appliance according to claim 4, wherein: the fan (8) is a direct current fan, and the fan (8) is respectively connected with a DC-L port and a DC-N port of the PCB control computer board (2).

6. The fan current detection control method of a home appliance according to claim 5, wherein: the timer (1) is connected with an L1 port of the PCB control computer board (2), an L2 port of the PCB control computer board (2), the temperature controller (10), the functional switch (11) and the heating element (12) are sequentially connected, and the heating element (12) is respectively connected with the temperature limiter (9) and an N1 port of the PCB control computer board (2).

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