UV germicidal panel light

1. A UV germicidal panel light comprising:

a light body having a square shape with four lateral faces, each of the four lateral faces provided with an accommodating groove;

four gratings connected to the light body, wherein each of the four gratings are provided in a corresponding one of the accommodating grooves and each of the four gratings comprise several light emitting grooves and an inner wall provided with a light absorption layer, the several light emitting grooves extending towards and away from the light body; and

four UV germicidal modules connected to the light body or the gratings wherein each of the four UV germicidal modules are directed towards a corresponding one of the four gratings.

2. The UV germicidal panel light as claimed in claim 1 , wherein the light body comprises a top plate, a bottom plate and erection columns, the top plate and the bottom plate are provided face to face to form a cavity between the top plate and the bottom plate, four of the erection columns are provided in four top corners of the cavity respectively, and two ends of the erection columns connect to the top plate and the bottom plate respectively.

3. The UV germicidal panel light as claimed in claim 1 , wherein the light emitting groove of each grating is provided horizontally or obliquely upward; and/or

wherein each of the four gratings comprises several light absorption plates whose surface is provided with the light absorption layer, and each of the several light emitting grooves are formed by two adjacent light absorption plates; and/or

wherein each of the four UV germicidal modules comprises a UV light tube and a reflex housing, the light body and the reflex housings forming the accommodating grooves, and the light body comprises a first supporting arm which connects to the reflex housings.

4. The UV germicidal panel light as claimed in claim 3 , wherein each of the light absorption plates comprise several jagged steps which reflect UV rays and are provided in sequence,

wherein each of the steps includes a first reflex surface and a second reflex surface,

wherein the first reflex surfaces face an inlet of the light emitting groove and the second reflex surfaces are each provided between two of the first reflex surfaces, and

wherein an area of the first reflex surface is less than that of the second reflex surface.

5. The UV germicidal panel light as claimed in claim 4 , wherein the light body comprises a second supporting arm by which the four gratings are movably mounted to the light body.

6. The UV germicidal panel light as claimed in claim 4 , wherein the UV germicidal panel light comprises four second supporting arms which are provided in four top corners of the light body and are covered by a fixed cover, and

wherein each fixed cover and a corresponding second supporting arm form a cavity.

7. The UV germicidal panel light as claimed in claim 6 , wherein each of the second supporting arms are provided with a first insertion hole, and each of the gratings are provided with a second insertion hole corresponding to one of the first insertion holes; and

wherein the UV germicidal panel light further comprises fixed pins provided in the first insertion holes and the second insertion holes to lock the gratings.

8. The UV germicidal panel light as claimed in claim 6 , wherein a top of the light body is provided with a sealing cover fixed to the light body and spaced apart from the light body.

9. The UV germicidal panel light as claimed in claim 8 , wherein each of the second supporting arm is provided with a first cross arm and each of the first cross arms is provided with a U-shaped hole, and

wherein one end of the U-shaped hole runs through an outside end of a respective first cross arm.

10. The UV germicidal panel light as claimed in claim 1 , wherein a center of the light body is provided with a centrifugal fan whose air inlet faces a bottom of the light body, and

wherein the light body is provided with an air inlet channel corresponding to the air inlet of the centrifugal fan, and the centrifugal fan blows air from an air outlet of the centrifugal fan to the four gratings.

11. The UV germicidal panel light as claimed in claim 1 , wherein a bottom of the light body is provided with a lighting module fixed to the light body and spaced apart from the light body.

12. The UV germicidal panel light as claimed in claim 2 , wherein a periphery of a bottom of the light body is provided with a deflector which extends towards a lower part of the light body.