Method and apparatus for detecting and controlling liquid boiling

[0027] Example 1: Combination figure 1 with figure 2 As shown, an electromagnetic induction coil (7) and an electric circuit board (2) are arranged inside the base (6). The electric circuit board (2) is provided with a filter circuit and other circuits that can filter out noise and other interference sounds. The side wall of (6) is provided with a start switch (5), a stop switch (33) and a microphone (1). A hob panel (8) is set above the electromagnetic induction coil (7) and placed on the panel (8) The cup body (9) made of metal materials, the opening of the cup body (9) is provided with a cup cover (15), and the cup cover (15) is provided with a sounder body (10), a reed (11) and a cover The sound generator (29) of (12), the body (10) is provided with an air flow channel (14), the cover (12) is provided with an exhaust hole (13), and the bottom of the base (6) is provided with a bottom plate (3), A rubber pad (28) is provided under the bottom plate (3), a connecting rod (27) extending downward is provided inside the base (6), and a screw (4) is provided at the end of the connecting rod (27) After the screw (4) is screwed in, the rubber pad (28), the bottom plate (3) and the base (6) can be connected into one body.

[0028] In this embodiment, the vessel containing the liquid is the cup body (9) and the cup lid (15). When the cup lid (15) is covered on the cup body (9), since the cup lid (15) has a certain weight, The vapor pressure generated when the liquid is boiling is not enough to open the lid in the initial stage, and the vapor can only pass through the airflow channel (14) in the sounder (29) and then be discharged from the exhaust holes (13). When the cross-sectional area of ​​the air flow channel (14) and the total cross-sectional area of ​​each exhaust hole (13) are compatible with a certain heating power and vessel structure, that is, the steam generated per unit time can immediately pass through the air flow channel (14) and then When exhausted from each vent (13), the steam pressure in the vessel is low enough to open the lid (15), so that the lid (15) and the body (9) are still basically sealed , The steam generated when the liquid boils is basically all discharged from the air flow channel (14) and the exhaust hole (13). Therefore, the vessel containing the liquid in this embodiment has a structure in which the steam generated when the liquid is boiling can pass through the sound generator (29).

[0029]When the user uses it, first add an appropriate amount of liquid to the cup body (9), cover the cup lid (15), and then press the start switch (5), so the relay cable package CJ1 is energized, and the relay connected in parallel with the start switch (5) The normally open contact of the wire package CJ1 is closed, and the electromagnetic induction coil (7) is energized to heat the liquid. When the temperature of the liquid rises to the boiling temperature, the vaporization of the liquid will produce a large amount of steam, which will pass through the airflow channel (14) of the sounder (29) and then be discharged from the exhaust hole (13). At the same time, the airflow makes the reed ( 11) Produce vibration and sound. The microphone (1) converts the received sound signal into an electric signal and transmits the electric signal to the filter circuit. After the filter circuit processes the electric signal to filter out the signal caused by noise and other interference sounds, The electric signal is transmitted to the control circuit, and the control circuit immediately energizes the relay wire package CJ2 after receiving the electric signal. After the relay line package CJ2 is energized, its normally closed contact in the relay line package CJ1 circuit is disconnected immediately, so the relay line package CJ1 is de-energized. After the relay wire package CJ1 is de-energized, its normally open contacts are also disconnected, so that the electromagnetic induction coil (7) and the electrical circuit board (2) are all de-energized.

[0030] During the heating process, if the user needs to stop heating, he can press the stop switch (33) to power off the relay cable package CJ1. After the relay wire package CJ1 is powered off, its normally open contact is also disconnected, so the electromagnetic induction coil (7) is powered off to stop heating, and the electrical circuit board (2) is powered off at the same time.

[0031] Example 2: Combination image 3 with Figure 4 As shown, an electromagnetic induction coil (16) is arranged below the faucet (21) of the drinking fountain, a hob panel (17) is arranged above the electromagnetic induction coil (16), and a cup made of metal material is placed on the panel (17) (18), the opening of the cup body (18) is provided with a cup cover (19), and the cup cover (19) is provided with a sounder (20); the sounder (20) adopts the airflow swirling method to sound (whistle Sounding principle), which includes an air inlet (30), a swirling cavity (32) and an air outlet (31); a microphone (22) is set on the water dispenser housing (24) above the sounder (20), and the water dispenser An electric circuit board (25) is arranged in the casing (24), and a start switch (23) and a stop switch (34) are arranged on the water dispenser casing (24).

[0032] When using this embodiment, the user first opens the cup lid (19), then turns on the faucet (21), and puts the water in the water hopper (26) of the water dispenser into the cup body (18) (you can also receive water from other places) Or connect other liquids), then close the lid (19), and then press the start switch (23). At this time, the control circuit will turn on the power of the electromagnetic induction coil (16) to heat the water in the cup (18). When the water temperature rises to the boiling temperature, the water vaporization will produce a large amount of water vapor, which will enter the swirling cavity (32) of the sounder (20) from the air inlet (30) and swirl in the swirling cavity (32), and then Exhaust from the air outlet (31), the water vapor will produce sound during this flow process (whistle sounding principle), the microphone (22) converts the received sound signal into an electrical signal and transmits the electrical signal to the electrical circuit board (25), the electrical circuit board (25) immediately disconnects the power supply of the electromagnetic induction coil (16) after receiving the electrical signal.

[0033] During the heating process, if the user needs to stop heating, he can press the stop switch (34) to cut off the power of the electromagnetic induction coil (16) to stop heating.