Refrigerating and freezing device

1. A refrigerating and freezing device, comprising:

a cabinet body, wherein at least one storage compartment is defined in the cabinet body and a heating cavity configured to accommodate a to-be-processed object is defined in one of the storage compartments; and

an electromagnetic heating device, configured to provide electromagnetic waves into the heating cavity to heat the to-be-processed object in the heating cavity, wherein the electromagnetic heating device is provided with an electromagnetic generation module configured to generate an electromagnetic wave signal and a power supply module configured to provide a power source to the electromagnetic generation module; wherein

an accommodation groove with a backward opening is formed in a back of the cabinet body, the backward opening of the accommodation groove is covered with a cover body to define an accommodation space between the accommodation groove and the cover body, and heat dissipation holes configured to achieve communication between the accommodation space and an external environment where the cabinet body is located are formed in the cover body; and

the power supply module is disposed in the accommodation space, and a heat dissipation fan is further disposed in the accommodation space and is configured to drive airflow to flow between the accommodation space and the external environment where the cabinet body is located through the heat dissipation holes, so as to dissipate heat from the power supply module, wherein the heat dissipation holes comprise an air inlet hole and an air outlet hole, both the air inlet hole and the air outlet hole are covered with water retaining ribs, and bottoms of the water retaining ribs are spaced from a backward surface of the cover body, so as to allow an airflow to flow through.

2. The refrigerating and freezing device according to claim 1 , wherein

the air inlet hole is formed in a bottom of the cover body and the air outlet hole is formed in a top of the cover body, so as to allow the airflow driven by the heat dissipation fan to enter the accommodation space through the air inlet hole and flow out through the air outlet hole, so as to carry out forced convection heat dissipation on the power supply module.

3. The refrigerating and freezing device according to claim 2 , wherein

both the air inlet hole and the air outlet hole are strip-shaped holes extending in a transverse direction.

4. The refrigerating and freezing device according to claim 2 , wherein

both the air inlet hole and the air outlet hole extend in a transverse direction, and are divided into a plurality of sub air inlets and a plurality of sub air outlets by a plurality of separation ribs disposed in the transverse direction side by side.

5. The refrigerating and freezing device according to claim 1 , wherein

the water retaining ribs are arc water retaining ribs protruded and bent backwards from the backward surface of the cover body from top to bottom.

6. The refrigerating and freezing device according to claim 1 , wherein

the heat dissipation fan is disposed at a top of the power supply module; and

the heat dissipation fan is an axial flow fan.

7. The refrigerating and freezing device according to claim 1 , wherein

the power supply module comprises a printed circuit board (PCB) configured to integrate a power source processing circuit, the PCB is provided with an input terminal configured to be connected with a power supply source and an output terminal configured to be connected with the electromagnetic generation module, so that a power voltage input by the input terminal is processed by the power source processing circuit on the PCB and then output to the electromagnetic generation module by the output terminal.

8. The refrigerating and freezing device according to claim 1 , wherein

a storage device with a cylinder body and a door body is placed in one of the storage compartments, and the heating cavity is formed in the storage device; and

the electromagnetic heating device further comprises a radiation antenna and a signal processing and measurement control circuit disposed in the cylinder body, the radiation antenna is electrically connected with the signal processing and measurement control circuit, and the electromagnetic generation module is electrically connected with the signal processing and measurement control circuit and is then electrically connected with the radiation antenna.

9. The refrigerating and freezing device according to claim 8 , wherein

the electromagnetic generation module is disposed at an outer side of a foaming layer of the cabinet body, and the electromagnetic generation module is electrically connected with the signal processing and measurement control circuit through a wire predisposed in the foaming layer of the cabinet body.