Abstract: The invention relates to the technical field of a refrigerator or a wine refrigerator, and more particularly relates to a combined shelf structure. The combined shelf structure is arranged in a wine refrigerator. The combined shelf structure comprises at least two shelf bodies and at least two carrier bars. Connecting holes through which two carrier bars pass are respectively arranged at both ends of each shelf body. Either the top surface or the bottom surface of the shelf body is provided with a groove, and the remaining surface is provided with a flat structure. The carrier bars pass through the connecting holes. The shelf body with a top surface and a bottom surface which is different from the top surface provides choices to users for placing wine bottles or other canned and bottled drinks vertically or horizontally.

Abstract: The invention relates to the technical field of a refrigerator or a wine refrigerator, and more particularly relates to a combined shelf structure. The combined shelf structure is arranged in a wine refrigerator. The combined shelf structure comprises at least two shelf bodies and at least two carrier bars. Connecting holes through which two carrier bars pass are respectively arranged at both ends of each shelf body. Either the top surface or the bottom surface of the shelf body is provided with a groove, and the remaining surface is provided with a flat structure. The carrier bars pass through the connecting holes. The shelf body with a top surface and a bottom surface which is different from the top surface provides choices to users for placing wine bottles or other canned and bottled drinks vertically or horizontally.

Abstract: A solar water heater includes a number of elongate water heating units which can be interconnected in series. The solar water heater can be installed vertically or inclined to have maximum solar exposure. Each water heating unit can utilize inner and outer glass tubes, which may or may not be a twin glass tube, to collect and conserve solar thermal energy inside. An inner metal water container extends through an opening in the inner and outer glass tubes. Heat transfer elements can be inserted between the inner tube and the metal water container. The solar water heater can work on natural convection and city water pressure.

Abstract: A solar water heater includes a number of elongate water heating units which can be interconnected in series. The solar water heater can be installed vertically or inclined to have maximum solar exposure. Each water heating unit can utilize inner and outer glass tubes, which may or may not be a twin glass tube, to collect and conserve solar thermal energy inside. An inner metal water container extends through an opening in the inner and outer glass tubes. Heat transfer elements can be inserted between the inner tube and the metal water container. The solar water heater can work on natural convection and city water pressure.