Refrigeration equipment

Abstract

The invention provides refrigeration equipment which comprises a box body and a middle beam arranged in the middle of the box body, a storage chamber is defined by the box body, and the storage chamber is divided into a freezing chamber and a refrigerating chamber by the middle beam. The refrigeration equipment is further provided with a cooling chamber arranged on the back portion of the freezing chamber, an air supply duct used for conveying cooled cold air in the cooling chamber into the refrigerating chamber, a first air return duct used for enabling air in the refrigerating chamber to flow back into the cooling chamber, and a refrigeration air return pipe used for forming the first air return duct in a limited mode. And the refrigeration air return pipe is arranged in the middle beam. The refrigeration equipment can save space and avoid excessive local frosting.

Description

Technical Field

[0001] This invention relates to a refrigeration device. Background Technology

[0002] Existing refrigeration equipment typically uses air cooling to improve refrigeration efficiency. Generally, existing air-cooled refrigeration equipment includes at least a refrigerator compartment and a freezer compartment. Cooled air, after being cooled by the evaporator, flows to the refrigerator and freezer compartments respectively through air ducts. Each compartment has its own air outlet for the incoming cool air. The return air duct for the refrigerator compartment is usually located at the rear of the refrigerator compartment and connects to the cooling compartment. This occupies space at the rear of the refrigerator compartment, has a relatively long return air path, and can lead to excessive localized frost buildup on the evaporator.

[0003] In view of this, it is necessary to improve the existing refrigeration equipment to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a refrigeration device that can save space and avoid excessive local frost formation.

[0005] To achieve the above-mentioned objectives, the present invention provides a refrigeration device, which includes a housing and a central beam disposed in the middle of the housing. The housing defines a storage compartment, and the central beam divides the storage compartment into a freezer compartment and a refrigerator compartment. The refrigeration device further includes a cooling chamber disposed at the rear of the freezer compartment, an air supply duct for sending cooled air from the cooling chamber to the refrigerator compartment, and a first return air duct for returning air from the refrigerator compartment to the cooling chamber. The refrigeration device has a refrigerator return air duct defining the first return air duct, and the refrigerator return air duct is disposed within the central beam.

[0006] As a further improvement of the present invention, the upper end of the refrigerated return air duct is the return air outlet, and the lower end is the return air inlet. The return air outlet is connected to the bottom of the cooling chamber and is located on one side of the cooling chamber in the left-right direction.

[0007] As a further improvement of the present invention, the refrigerated return air duct has a main pipeline extending along the height direction and a connecting pipeline connected to the top end of the main pipeline. The return air outlet is located at the end of the connecting pipeline connected to the cooling chamber, and the connecting pipeline is arranged at an angle to the main pipeline.

[0008] As a further improvement of the present invention, the connecting pipe is inclined, and the end of the connecting pipe connected to the main pipe is higher than the end connected to the cooling chamber. This allows water vapor to flow into the drip tray below the evaporator, preventing it from flowing into the refrigerator compartment.

[0009] As a further improvement of the present invention, the connection portion of the connecting pipe and the main pipe is provided with an upwardly protruding baffle, which is located inside the refrigerated return air duct to partially separate the connecting pipe and the main pipe.

[0010] As a further improvement of the present invention, the baffle extends upward from the wall of the refrigerated return air duct and extends in the front-to-back direction. This prevents cold air from flowing back into the refrigerated compartment during defrosting.

[0011] As a further improvement of the present invention, the refrigerated return air duct also has branch ducts extending from the main duct, and the connecting duct and the branch ducts are respectively located on the left and right sides of the main duct.

[0012] As a further improvement of the present invention, the distance from the branch pipe to the top of the main pipe is greater than the distance from the branch pipe to the bottom of the main pipe.

[0013] As a further improvement of the present invention, the refrigeration device also has a mixing structure located at the rear of the refrigeration chamber, wherein the air cooled in the cooling chamber and the air in the refrigeration chamber flow into the mixing chamber formed by the mixing structure, mix, and then flow out into the refrigeration chamber.

[0014] As a further improvement of the present invention, the air mixing structure is located at the upper rear side of the refrigerator compartment, and is provided with an air outlet located on its front side for forward airflow, an air inlet duct for introducing air from the refrigerator compartment into the mixing chamber, and an air supply duct for connecting the cooling chamber and the mixing chamber.

[0015] The beneficial effects of the present invention are as follows: The refrigeration equipment of the present invention uses a cooling chamber located at the back of the freezer compartment, an air supply duct that sends the cooled air in the cooling chamber to the refrigerator compartment, and a refrigeration return air duct that returns the air in the refrigerator compartment to the cooling chamber. The refrigeration return air duct is located in the middle beam, thereby saving space and avoiding excessive local frost on the evaporator through a reasonable pipeline layout. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the refrigeration equipment of the present invention.

[0017] Figure 2 yes Figure 1 This is a schematic diagram of the refrigeration unit after the drawer located on the lower side has been removed.

[0018] Figure 3 yes Figure 2 A schematic diagram of the first embodiment of the refrigeration equipment after the casing has been removed.

[0019] Figure 4 yes Figure 3 Front view of the refrigeration equipment shown.

[0020] Figure 5 yes Figure 3 Another view of the refrigeration equipment shown.

[0021] Figure 6 yes Figure 4 A partial exploded view of the refrigeration equipment shown.

[0022] Figure 7 yes Figure 6 A front view of one embodiment of the refrigerated return air duct of the refrigeration equipment shown.

[0023] Figure 8 yes Figure 7 A partial cross-sectional view of the refrigerated return air duct shown.

[0024] Figure 9 yes Figure 6 A perspective view of another embodiment of the refrigerated return air duct of the refrigeration equipment shown.

[0025] Figure 10 yes Figure 6 A three-dimensional view of the mixing structure of the refrigeration equipment shown.

[0026] Figure 11 yes Figure 3 A partial sectional view of the refrigeration equipment shown.

[0027] Figure 12 yes Figure 3 Another partial sectional view of the refrigeration equipment shown.

[0028] Figure 13 yes Figure 3 A cross-sectional view of the mixing structure of the refrigeration equipment shown.

[0029] Figure 14 yes Figure 10 The side view of the air mixing structure shown.

[0030] Figure 15 yes Figure 10 The cross-sectional view of the air mixing structure shown.

[0031] Figure 16 yes Figure 1 A cross-sectional schematic diagram of the refrigeration equipment shown.

[0032] Figure 17 This is a schematic diagram of the second embodiment of the refrigeration equipment of the present invention after the casing is removed.

[0033] Figure 18 yes Figure 17 Another view of the refrigeration equipment shown.

[0034] Figure 19 yes Figure 17A cross-sectional view of the refrigeration equipment shown.

[0035] In the picture:

[0036] 100. Refrigeration equipment;

[0037] 10. Storage compartment; 11. Refrigerator compartment; 12. Functional area; 13. Freezer compartment; 14. Central beam; 15. Drawers; 16. Supporting structure;

[0038] 20. Cooling chamber; 21. Evaporator; 22. Fan;

[0039] 30. Mixing structure component; 301. Mixing chamber; 3011. First mixing zone; 3012. Second mixing zone; 3013. Connecting channel; 3014. First vertical channel; 3015. Second vertical channel; 3016. Narrowing channel; 302. Inclined surface; 31. Front wall; 312. Air outlet; 3121. First air outlet; 3122. Second air outlet; 3123. Third air outlet; 32. Rear wall; 321. Recess; 34. Partition wall; 341. First straight wall; 3412. Stepped section; 342. Connecting wall; 3421. End face; 343. Second straight wall; 35. Divider section; 36. Drainage trough;

[0040] 4. Air supply duct; 41. First air supply section; 411. Straight section; 412. Inclined section; 42. Second air supply section;

[0041] 5. Air intake duct; 51. First air intake section; 52. Second air intake section; 53. Third air intake section; 54. Fourth air intake section;

[0042] 6. Cover;

[0043] 71. Refrigerated return air duct; 7101. Return air outlet; 7102. Return air inlet; 7103. Secondary return air inlet; 711. Main pipe; 712. Connecting pipe; 713. Branch pipe; 714. Baffle; 72. Refrigerated air supply duct; 73. Refrigerated return air duct; 74. Drain pipe; 741. First drainage section; 742. Second drainage section; 75. Air guide duct. Detailed Implementation

[0044] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0045] The terms used herein, such as “up,” “down,” “left,” “right,” “front,” and “back,” indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures and should not be construed as limiting the claims. Furthermore, the descriptive term “horizontal” used herein is not entirely equivalent to being perpendicular to the direction of gravity and allows for a certain angle of inclination.

[0046] Please refer to Figures 1 to 2 The diagram shown is a schematic of the refrigeration device 100 of the present invention. Figures 3 to 16 This is a first embodiment of the refrigeration device 100. Figures 17 to 19 This is a second embodiment of the refrigeration device 100, wherein... Figures 7 to 8 This is one embodiment of the refrigerated return air duct 71 of the refrigeration equipment 100. Figure 9 This is another embodiment of the refrigerated return air duct 71 of the refrigeration equipment.

[0047] Specifically, the refrigeration equipment includes a cabinet and a central beam 13 disposed in the middle of the cabinet. The cabinet defines a storage compartment 10, and the central beam 13 divides the storage compartment 10 into a freezer compartment 12 and a refrigerator compartment 11. In the embodiment shown in this invention, the storage compartment 10 has a drawer 14 located at its lower part and a support structure 15 located at its upper part for supporting items.

[0048] The refrigeration equipment also includes a cooling chamber 20 located at the rear of the freezer compartment 12, an air supply duct 5 that sends the cooled air in the cooling chamber 20 to the refrigerator compartment 11, and a first return air duct that returns the air in the refrigerator compartment 11 to the cooling chamber 20. The refrigeration equipment 100 has a refrigerator return air pipe 71 that defines the first return air duct, and the refrigerator return air pipe 71 is located inside the central beam 13.

[0049] The upper end of the refrigerated return air duct 71 is the return air outlet 7101, and the lower end is the return air inlet 7102. The return air outlet 7101 is connected to the bottom of the cooling chamber 20 and is located on one side of the cooling chamber 20 in the left-right direction.

[0050] The refrigerated return air duct 71 has a main pipe 711 extending along the height direction and a connecting pipe 712 connected to the top end of the main pipe 711. The return air outlet 7101 is located at the end of the connecting pipe 712 connected to the cooling chamber 20. The connecting pipe 712 is set at an angle to the main pipe 711.

[0051] like Figure 4 , Figure 7 and Figure 8 As shown, the connecting pipe 712 is inclined, and the end of the connecting pipe 712 connected to the main pipe 711 is higher than the end connected to the cooling chamber 20. This allows water vapor in the connecting pipe 712 to flow downward into the water collection tray below the evaporator 21, preventing it from flowing into the refrigerator compartment 11.

[0052] like Figure 8 As shown, in some embodiments of the present invention, the refrigeration compartment 11 does not need to be provided with a functional area 112. In this case, the connection part of the connecting pipe 712 and the main pipe 711 is provided with an upwardly protruding baffle 714. The baffle 714 is located inside the refrigeration return air duct 71 to partially separate the connecting pipe 712 and the main pipe 711.

[0053] The baffle 714 extends upward from the wall of the refrigerated return air duct 71 and extends in the front-to-back direction. Thus, when the refrigerated compartment 11 does not have a functional area 112 and when the fan 22 stops operating, the baffle 714 can prevent cold air in the cooling chamber 20 from flowing into the refrigerated return air duct 71 during defrosting of the evaporator 21.

[0054] The refrigerated return air duct 71 also has a branch duct 713 extending from the main duct 711. The connecting duct 712 and the branch duct 713 are respectively located on the left and right sides of the main duct 711. When the fan 22 is operating normally, the air in the refrigerated compartment 11 enters the branch duct 713 and the main duct 711 through the secondary return air inlet 7103 of the branch duct 713 and the return air inlet 7102 of the main duct 711, and then flows into the cooling compartment 20.

[0055] The distance from the top of the branch pipe 713 to the top of the main pipe 711 is greater than the distance from the branch pipe 713 to the bottom of the main pipe 711.

[0056] like Figure 9 As shown, in some other embodiments of the present invention, a functional area 112 is provided in the refrigerator compartment 11. In this case, there is no need to install baffles or similar structures in the connecting pipe 712 of the refrigerator return air duct 71. When the fan 22 stops running and the evaporator 21 defrosts, the cold air in the cooling chamber 20 can sink from the refrigerator return air duct 71 and be sent to the functional area 112 located in the lower part of the refrigerator compartment 11.

[0057] In other words, when the refrigerator compartment 11 is equipped with a functional area 112, and when the fan 22 stops operating, the cooled air in the cooling chamber 20 flows into the lower part of the refrigerator compartment 11 through the refrigerator return air duct 71.

[0058] In some embodiments, the refrigeration system of the refrigeration device 100 is a single refrigeration system consisting of an evaporator 21 and a fan 22. Through connections such as air ducts, each temperature zone can be refrigerated independently. Furthermore, the multi-path airflow ducts for freezing and refrigeration ensure more uniform temperature distribution and less temperature fluctuation within each compartment. Additionally, the fan 22 operates intermittently; when operating normally, it blows cold air from the cooling chamber 20 into the refrigeration chamber 11 and the freezer chamber 12.

[0059] The refrigeration equipment 100 also has a refrigeration air supply duct 72 and a refrigeration air return duct 73 that connect the cooling chamber 20 and the freezing chamber 12. The refrigeration air supply duct 72 delivers the cooled air in the cooling chamber 20 to the freezing chamber 12, and the refrigeration air return duct 73 returns the air in the freezing chamber 12 to the cooling chamber 20.

[0060] The refrigeration equipment 100 also has a drain pipe 74 connected to the cooling chamber 20 to discharge water from the cooling chamber 20 to the outside, and the refrigerated return air duct 71 is disposed close to the drain pipe 74. The water inlet of the drain pipe 74 is lower in height than the return air outlet 7101 of the refrigerated return air duct 71.

[0061] In such Figures 3 to 6 In one embodiment shown, the refrigerated return air duct 71 and the drain pipe 74 are independent of each other and arranged side by side, and the drain pipe 74 extends downward beyond the bottom end of the refrigerated return air duct 71.

[0062] In such Figure 9 and Figure 17 In another embodiment shown, the drain pipe 74 extends into the refrigerated return air duct 71 and includes a first drain section 741 located on the upper side and a second drain section 742 located on the lower side. The first drain section 741 connects the cooling chamber 20 to the refrigerated return air duct 71, and the second drain section 742 extends downward from the bottom end of the refrigerated return air duct 71. The first drain section 741 is connected to the refrigerated return air duct 71 in the left-right direction on the side closer to the cooling chamber 20.

[0063] The refrigeration equipment 100 also has a mixing structure 30 located at the rear of the cold storage compartment 12. The air cooled in the cooling chamber 20 and the air in the cold storage compartment 12 flow into the mixing chamber 301 formed by the mixing structure 30, mix, and then flow out into the cold storage compartment 12.

[0064] The mixing structure 30 is located at the upper rear side of the refrigerator compartment 11, and has an air outlet 312 located on its front side for forward airflow, an air inlet duct 5 for introducing air from the refrigerator compartment 11 into the mixing chamber 301, and an air supply duct 4 connecting the cooling chamber 20 and the mixing chamber 301.

[0065] In some embodiments, the air mixing structure 30 includes a front wall 31 and a rear wall 32 disposed opposite to each other in the front-rear direction, and the front wall 31 is provided with an air outlet 312 formed through it in the front-rear direction.

[0066] The air outlet 312 includes a first air outlet 3121 located on the upper side and a second air outlet 3122 located on the lower side. The first air outlet 3121 is disposed near the upper edge of the air mixing structure 30.

[0067] like Figure 9 As shown, both the first air outlet 3121 and the second air outlet 3122 are arranged facing forward, and the width of the first air outlet 3121 in the horizontal direction is greater than the width of the second air outlet 3122 in the horizontal direction. Figure 14 As shown, the opening size of the second air outlet 3122 in the height direction is smaller than the opening size of the first air outlet 3121 in the height direction. In this embodiment, there is a distance between the second air outlet 3122 and the lower end face of the air mixing structure 30.

[0068] When the refrigerator compartment 11 is provided with a functional area 112, the air outlet 312 further includes a third air outlet 3123 located below the second air outlet 3122 in the height direction, and the third air outlet 3123 is arranged to open downwards. In addition, the refrigeration equipment 100 also has a duct 75 connected to the third air outlet 3123.

[0069] The air mixing structure 30 also has a partition wall 34 located between the front wall 31 and the rear wall 32 in the front-rear direction. The partition wall 34 is located on the side of the air mixing structure 30 near the cooling chamber 20 and separates the air supply duct 4 and the air inlet duct 5.

[0070] The air supply duct 4 is located behind the air inlet duct 5, and the air supply duct 4 includes a first air supply section 41 connecting the air mixing structure 30 and the cooling chamber 20, and a second air supply section 42 formed on the air mixing structure 30. The second air supply section 42 is defined by the partition wall 34 and the rear wall 32. The side end face of the partition wall 34 near the cooling chamber 20 is not flush with the side end face of the rear wall 32 near the cooling chamber 20, and the side end face of the partition wall 34 near the cooling chamber 20 is closer to the cooling chamber 20 than the side end face of the rear wall 32 near the cooling chamber 20. That is, the partition wall 34 extends beyond the side end face of the rear wall 32 in the left-right direction toward the cooling chamber 20, so that the partition wall 34 has a stepped portion 3412 protruding from the rear wall 32.

[0071] Specifically, the partition wall 34 includes a first straight wall 341, a connecting wall 342, and a second straight wall 343 connected in sequence. The stepped portion 3412 is formed at the end of the first straight wall 341 and is located on the side of the first straight wall 341 away from the connecting wall 342. The first straight wall 341 and the second straight wall 343 are offset in the front-rear direction so that the connecting wall 342 is inclined, and the first straight wall 341 is located in front of the second straight wall 343 in the front-rear direction.

[0072] The second straight wall 343 has an end face 3431 located at one end away from the connecting wall 342. The end face 3431 is inclined, and the rear end of the end face 3431 is away from the connecting wall 342, while the front end is close to the connecting wall 342, thereby effectively preventing the cold air from the cooling chamber 20 from being blown directly out of the air inlet duct 5 without mixing.

[0073] The first air supply section 41 includes a straight section 411 connected to the second air supply section 42 and an inclined section 412 connecting the straight section 411 to the cooling chamber 20. The end of the inclined section 412 connected to the cooling chamber 20 is located in front of the end connected to the straight section 411 in the front-back direction, so that the straight section 411 is located behind the refrigeration air outlet of the cooling chamber 20.

[0074] The rear wall 32 has a recessed portion 321 on the side near the cooling chamber 20, recessed from its front surface backwards. The recessed portion 321 is spaced apart from the end face of the rear wall 32 near the cooling chamber 20 in the left-right direction. The recessed portion 321 is correspondingly positioned to the second straight wall 343 to avoid the second air supply section 42 becoming narrower at this location due to the rearward offset of the second straight wall 343. The second air supply section 42 has its largest front and rear openings at the portion adjacent to the first air supply section 41 to facilitate the reception of cold air from the first air supply section 41.

[0075] The air inlet duct 5 and the air outlet duct 4 are located on the same side of the air mixing structure 30 in the left-right direction. Specifically, the air inlet duct 5 includes a first air inlet section 51 located near the cooling chamber 20, a second air inlet section 52 located away from the cooling chamber 20, and third and fourth air inlet sections 53 and 54 located between the first air inlet section 51 and the second air inlet section 52. The first air inlet section 51 is defined by the partition wall 34 and the cover 6.

[0076] The diameter of the second air inlet section 52 in the front-to-back direction is smaller than that of the adjacent third air inlet section 53. The opening size of the first air inlet section 51 in the front-to-back direction is smaller than that of the adjacent fourth air inlet section 54 in the front-to-back direction. Furthermore, the opening size of the first air inlet section 51 in the front-to-back direction is smaller than that of the first air inlet section 51. In other words, the first air inlet section 51 is the narrowest part of the entire air inlet duct 5, thereby effectively controlling the airflow from the refrigerator compartment 11 into the mixing chamber 301.

[0077] like Figures 10 to 13 As shown, the mixing structure 30 also has a partition 35 located inside the mixing chamber 301 and connecting the front wall 31 and the rear wall 32. The partition 35 divides the mixing chamber 301 into a first mixing region 3011 and a second mixing region 3012. The first mixing region 3011 and the second mixing region 3012 are connected on the side near the cooling chamber 20.

[0078] Furthermore, the partition 35 has a protrusion 351 extending toward the air supply duct 4. In this embodiment, the protrusion 351 is disposed near the bottom end of the mixing structure 30 in the height direction, so that the receiving space of the first mixing region 3011 is larger than the receiving space of the second mixing region 3012.

[0079] The partition 35 has a first side edge 352 and a second side edge 353 that are arranged opposite each other in the height direction. The first and second side edges 352 and 353 are both concave arc shapes so as to make the mixing space on both sides of the partition 35 larger.

[0080] like Figure 15 As shown, the first air outlet 3121 is connected to the first mixing region 3011 from front to back, and the second air outlet 3122 is connected to the second mixing region 3012 from front to back. The first mixing region 3011 has a connecting channel 3013 located on its upper side and connected to the first air outlet 3121, and a first vertical channel 3014 located on its lower side and extending in a vertical direction. The connecting channel 3013 is inclined and set at an angle to the first vertical channel 3014, and the opening width of the connecting channel 3013 is greater than the opening height of the first air outlet 3121.

[0081] The second mixing region 3012 includes a second vertical channel 3015 extending vertically on its upper side and a narrowing channel 3016 located on its lower side and connected to the second air outlet 3122. The narrowing channel 3016 is connected forward to the second air outlet 3122 and downward to the third air outlet 3123. The upper part of the narrowing channel 3016 has a larger opening size in the front-back direction than the lower part has a larger opening size in the front-back direction.

[0082] Furthermore, such as Figures 1 to 4 As shown, in some embodiments, the refrigeration device 100 has a double-door structure, the cooling chamber 20 is located on the upper side of the back of the freezer chamber 12, and the mixing chamber 301 is located on the upper part of the back of the refrigerator chamber 11.

[0083] The air mixing structure 30 also has a drainage groove 36 located on its lower side, which runs through the air mixing structure 30 in the vertical direction to discharge the condensation formed in the mixing chamber outward.

[0084] In addition, the air mixing structure 30 is provided with an inclined surface 302 located on its lower side and angled to the vertical plane, and the outlet end of the drainage channel 36 is opened on the inclined surface 302. In this way, the opening of the outlet end of the drainage channel 36 is enlarged, which facilitates the rapid discharge of water.

[0085] In some embodiments, the drainage groove 36 is connected to the air inlet duct 5, and the projection of the drainage groove 36 on the horizontal plane falls within the projection of the air inlet duct 5 on the horizontal plane. The drainage groove 36 is located on the side of the second air outlet 3122 closer to the cooling chamber 20 in the left-right direction, and the lower edge of the drainage groove 36 on the inclined surface 302 is located below the second air outlet 3122. In addition, the second air outlet 3122 is located within the extension range of the inclined surface 302 in the height direction.

[0086] In this invention, the refrigeration equipment 100 uses a cooling chamber 20 located at the rear of the freezer compartment 12 to send the cooled air in the cooling chamber 20 to the air supply duct 4 in the refrigerator compartment 11. The air in the refrigerator compartment 11 is returned to the cooling chamber 20 using a refrigerator return air duct 71, and the refrigerator return air duct 71 is located in the central beam 13. This reasonable pipe layout saves space and avoids excessive local frost buildup on the evaporator 21.

[0087] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0088] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A refrigeration device, characterized in that: It includes a housing and a central beam (13) disposed in the middle of the housing. The housing defines a storage room (10). The central beam divides the storage room into a freezer room (12) and a refrigerator room (11). The refrigeration equipment also has a cooling chamber (20) disposed at the back of the freezer room (12), an air supply duct (4) for sending the cooled air in the cooling chamber to the refrigerator room, and a first return air duct for returning the air in the refrigerator room to the cooling chamber. The refrigeration equipment has a refrigerator return air pipe (71) defining the first return air duct. The refrigerator return air pipe (71) is disposed in the central beam (13).

2. The refrigeration equipment as described in claim 1, characterized in that: The refrigerated return air duct (71) has a return air outlet (7101) at the upper end and a return air inlet (7102) at the lower end. The return air outlet (7101) is connected to the bottom of the cooling chamber and is located on one side of the cooling chamber in the left-right direction.

3. The refrigeration equipment as described in claim 2, characterized in that: The refrigerated return air duct (71) has a main duct (711) extending along the height direction and a connecting duct (712) connected to the top of the main duct. The return air outlet (7101) is located at the end of the connecting duct (712) connected to the cooling chamber (20). The connecting duct (712) is set at an angle to the main duct (711).

4. The refrigeration equipment as described in claim 3, characterized in that: The connecting pipe (712) is inclined, and the end of the connecting pipe (712) connected to the main pipe (711) is higher than the end connected to the cooling chamber (20).

5. The refrigeration equipment as described in claim 4, characterized in that: The connection between the connecting pipe (712) and the main pipe (711) is provided with an upwardly protruding baffle (714), which is located inside the refrigerated return air duct (71) to partially separate the connecting pipe (712) and the main pipe (711).

6. The refrigeration equipment as described in claim 5, characterized in that: The baffle (714) extends upward from the wall of the refrigerated return air duct (71) and extends along the front-back direction.

7. The refrigeration equipment as described in claim 3, characterized in that: The refrigerated return air duct (71) also has a branch duct (713) extending from the main duct (711), and the connecting duct (712) and the branch duct (713) are respectively located on the left and right sides of the main duct (711).

8. The refrigeration equipment as described in claim 7, characterized in that: The distance from the branch pipe (713) to the top of the main pipe (711) is greater than the distance from the branch pipe (713) to the bottom of the main pipe (711).

9. The refrigeration equipment according to any one of claims 1 to 8, characterized in that: The refrigeration equipment also has a mixing structure (30) located at the rear of the cold storage compartment (11), where the air cooled in the cooling compartment and the air in the cold storage compartment flow into the mixing chamber (301) formed by the mixing structure (30) and mix before flowing out into the cold storage compartment.

10. The refrigeration equipment as described in claim 9, characterized in that: The mixing structure (30) is located at the upper rear side of the cold storage chamber (11), and has an air outlet (312) located on its front side for forward airflow, an air inlet duct (5) for introducing air from the cold storage chamber into the mixing chamber, and an air supply duct (4) connecting the cooling chamber and the mixing chamber.

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