Heating cup, high frequency heating unit, and hookah

1. A heating unit comprising a magnetic induction coil, a battery, a hollow handle and a hollow annular structure; wherein:

the battery comprises a power panel comprising an LC circuit configured to convert a boosted DC voltage and current into an alternating current when the alternating current passes through the magnetic induction coil, an alternating magnetic field is generated;

the battery is disposed in the hollow handle, and

the magnetic induction coil is disposed in the hollow annular structure.

2. A hookah, comprising a heating cup and the heating unit of claim 1 ; wherein:

the heating cup comprises a heating container configured to be heated by the heating unit; and

the heating unit is disposed around the heating container; in a power-on state, the heating container is configured to produce heat under the action of the heating unit to heat a tobacco material and produce smoke.

3. The hookah of claim 2 , wherein the heating cup further comprises an air inlet nozzle; and the air inlet nozzle comprises a first air passage communicating with the heating container.

4. The hookah of claim 3 , wherein an airflow volume of the air inlet nozzle is changeable through covering a part of the air inlet nozzle with a finger.

5. The hookah of claim 4 , wherein the air inlet nozzle is made of ceramic material.

6. The hookah of claim 5 , wherein the heating container is an integrated structure comprising glass inlaid with metal.

7. The hookah of claim 6 , wherein the heating container comprises a second air passage separated from the metal.

8. The hookah of claim 2 , further comprising a water filter; wherein when in use, the smoke is filtered by the water filter and then inhaled by a user.