Development of Single Chip Microcomputer for Heater PCBA Scheme

2020-12-14 09:07:02

Development of Single Chip Microcomputer for Heater PCBA Scheme


 One. Plug in

1. When the power is connected, only the POWER LED is on, and the whole machine is in standby state

2. When the power is plugged in (no buttons are operated), the following actions cannot be performed

﹙A﹚The relay must not flash instantly

﹙B﹚The fan motor should not flash momentarily


two. Start the electric heater

1. Directly press the ON button to start the electric heating fan

2. After pressing the ON button, the electric heater only has, blowing out cold air

3. The FAN LED indicator lights up and the preset ambient temperature 75℉ LED lights up


three. Switch electric heater

1. When the heater is turned on, no matter which mode the heater is in, just press the OFF button to turn it off, and the whole machine is in standby state.

2. Once the OFF button is pressed for shutdown, the heating PTC and head motor should stop working immediately.

  Only the fan motor has a 10-second delay to power off. There is no delay when the OFF button is pressed when the PTC is not activated.

3. LED displays the current set temperature

4. POWER LED lights up continuously (unless the power is unplugged to go out)

5. No memory action after shutdown


four. Operation mode setting of electric heater temperature

A.1. This electric heater has a hot air file and a cold air file, and the hot air file has two files: high (HIGH) and low (LOW)

    This electric heater is turned on with cold wind. To change the mode, just press the MODE button. Its operation mode is:

  2. The preset temperature of this machine is 75℉, (that is, do not press the "+" and "-" keys when turning on the machine, and the 75℉ LED is on.

B. Operation of cold wind gear:

  1. Press the ON button once, and the output is in cold air mode

  2. The low-end fan runs immediately, the FAN LED indicator is on

C. Low-end operation of hot air:

  1. To switch from cold air to hot air low level, just press the MODE button to enter hot air low level

  After 2.1 seconds, start the PTC of hot air low-grade heating (only when the ambient temperature is lower than the preset value of 75°F)

  3. At this time, the LOW LED is on

D. High-end operation of hot air

  1. To switch from low-end hot air to high-end hot air, just press the MODE button to enter the high-end hot air

  2. When changing from hot air low to hot air high, the high-end fan motor starts immediately, releases the low-end fan motor in 0.5 seconds, and then starts the high-end heating PTC in 0.5 seconds (only when the ambient temperature is lower than the preset value 75°F)

  3. When the hot air is high-end, two heating PTCs are heated at the same time

  4. At this time, the HIGH LED is on

E. If the hot air is in the high-end, press the MODE button again to immediately switch to the cold air file

  1. Power off the PTC if it is hot, start the fan motor in 0.5 seconds and turn off the high-end fan motor in 0.5 seconds

  2. Execute the operation of the cold wind gear, the FAN LED is on

     

Fives. Operation of setting constant temperature

A. 1. Only the LOW and HIGH files have the function of constant temperature and the operation of temperature setting. The "+" and "—" keys are not controlled in the FAN file.

   2. The heating PTC can only be activated when the ambient temperature is lower than the set temperature by 1℉

   3. Only when the ambient temperature is higher than the set temperature by 1°F can the heating PTC stop heating

   4. When the fixed temperature is not set, the machine uses the preset temperature of 75°F to perform the constant temperature action. When the ambient temperature is higher than the preset temperature of 75°F, it will automatically cut off the heating PTC power supply. At this time, only the fan is running, and the environment The heating PTC will be activated automatically when the temperature is lower than the preset temperature of 75°F.

B. When the heater is in the LOW and HIGH gears, if the ambient temperature is high, you can directly press the "+" key to set the desired set temperature value

C. If you want the ambient temperature to be lower, just press the "-" key to set your favorite temperature,

D. When the temperature adjustment operation of the "+" and "—" keys is performed, the LED indicates the temperature value being set

E. After the operation is completed, the LED for setting the temperature value will flash 10 times, (flashing at 1HZ), and then the temperature will be the set temperature value.


six. Operation of swing head setting

1. The machine is equipped with a head-swing function, the user only needs to press the OSC button to make the electric heater do the head-swinging action

2. When the swing head starts, the swing head motor runs immediately, without LED indication.


Seven. The operation method of the remote control is exactly the same as that of the main unit, please participate in the above description.


Eight. Serious warning

    The user must perform the shutdown according to the normal shutdown procedure, and do not directly unplug the power plug to shut down. This action is extremely dangerous operation method, because the PTC is under high temperature and high heat without cooling action, which may cause fire. Please pay special attention and keep in mind.