Refrigeration device

Abstract

The present disclosure relates to a refrigeration device including a cabinet including a cabinet door, a plurality of shelves arranged at vertical intervals within the cabinet, and a cover plate arranged within the cabinet and adjacent to the top wall of the cabinet. The cover plate is provided with a return air opening and an air deflector. The air deflector is connected with the side portion of the return air opening close to the cabinet door and extends obliquely downward. The included angle formed by the air deflector and the first line OB is smaller than the included angle formed by the second line OC and the first line OB. The first point O is selected at the connection portion between the return air opening and the air deflector. The vertical line passing through the first point O is regarded as the first line OB. The intersection point of the first line OB and the first shelf located at the uppermost layer among the plurality of shelves is the second point B. The shortest line between the first point O and the side portion of the first shelf farthest from the cabinet door is the third line OA, where A is the third point A which is a point on the first shelf. The point between the third point A and the second point B is the fourth point C. The connection line between the first point O and the fourth point C is the second line OC. The present disclosure can guarantee the return air volume and reduce the entrained hot air.

Description

Technical Field

[0001] This disclosure claims priority based on Chinese Patent Application No. 202221399467.4 filed on June 7, 2022, and the disclosure content of that application is incorporated herein by reference in its entirety.

[0002] This disclosure relates to the field of refrigeration devices, particularly refrigerators.

Background Art

[0003] Enclosed display cabinets, particularly vertical display cabinets with glass doors, are widely used in supermarkets and convenience stores for selling beverages, yogurt, milk, and instant snacks. Currently, enclosed display cabinets mainly supply air by an upper axial flow fan. The axial flow fan has a high wind speed, resulting in a lot of noise and drawing in more hot air. Furthermore, the axial flow fan is exposed and has a large size, which affects the appearance and effective volume of the display cabinet. Due to its compact size and simple structure, the cross-flow fan can make the display cabinet have a more aesthetic appearance and a larger effective volume. However, the display cabinet has problems of unstable air supply and high energy consumption.

Summary of the Invention

[0004] In one aspect of the present disclosure, a refrigeration device is provided. The refrigeration device includes a cabinet including a cabinet door, a plurality of shelves arranged at intervals in the vertical direction within the cabinet, and a cover plate arranged within the cabinet and adjacent to the top wall of the cabinet. The cover plate is provided with a return air port and an air deflector. The air deflector is connected such that the side portion of the return air port is close to the cabinet door and extends obliquely downward. The angle formed by the air deflector and the first line ОB is smaller than the angle formed by the second line OC and the first line OB. For the first line OB, the first point O is selected at the connection portion between the return air port and the air deflector, and the vertical line passing through the first point O is regarded as the first line OB. For the second line OC, the intersection point of the first line OB and the first shelf located at the uppermost layer among the plurality of shelves is the second point B. The shortest line between the first point O and the side portion of the first shelf farthest from the cabinet door is the third line OA, where A is the third point A which is a point on the first shelf 501. The point between the third point A and the second point B is the fourth point C. The connection line between the first point O and the fourth point C is the second line OC.

[0005] In some embodiments, the cover plate includes a first plate provided with an air supply port and a second plate connected to the first plate and located in a plane different from that of the first plate. The return air port is arranged on the second plate.

[0006] In some embodiments, the return air port includes a first strip-shaped through hole, and the length extension direction of the first strip-shaped through hole coincides with the extension direction of the first side portion of the second plate. The first side portion of the second plate is the side portion connected to the first plate.

[0007] In some embodiments, the first plate is farther away from the cabinet door than the second plate.

[0008] In some embodiments, the first plate is arranged horizontally, the first side of the second plate is connected to the first plate, and the second side of the second plate opposite the first side is inclined upward so as to be connected to the top wall.

[0009] In some embodiments, the refrigeration device further includes a cross-flow fan disposed between the cover plate and the top wall of the cabinet and located on one side facing the cabinet door, and the first plate covers the cross-flow fan.

[0010] In some embodiments, the first plate is provided with a plurality of air supply ports arranged at intervals along the axial direction of the cross-flow fan. The region on one side of the first plate away from the second plate is the first region where the plurality of air supply ports are provided. The area of the first region is e×f, where e is the length dimension e of the first region, the length dimension e is equal to or greater than the axial dimension of the cross-flow fan, and f is the width dimension f of the first region.

[0011] In some embodiments, the width dimension f is selected such that the fourth line DE, the fifth line DF, and the sixth line DG are each made on the radial section of the cross-flow fan starting from the center point D of the radial section of the cross-flow fan. The fourth line DE is perpendicular to the axis of the cross-flow fan. The angles formed by the fourth line DE and the fifth line DF, the fourth line DE and the sixth line DG, and the fifth line DF and the sixth line DG are all 120 degrees. The fifth line DF extends along the direction away from the second plate. The tangent line FH is made at the intersection point F of the fifth line DF and the edge of the radial section of the cross-flow fan. The distance from the intersection point H of the tangent line FH and the first plate to the side of the first plate away from the second plate is equal to the width dimension f.

[0012] In some embodiments, (S1×n1) / (e×f)×100%≧55%, where n1 is the number of the plurality of air supply ports and S1 is the opening area of a single air supply port.

[0013] In some embodiments, the air inlet includes a second strip-shaped through hole, and the length extension direction of the second strip-shaped through hole is perpendicular to the axial direction of the cross-flow fan.

[0014] In some embodiments, a plurality of air return ports are provided on the second plate, (S2×n2) / (g×h)×100%≧45%, where n2 is the number of the plurality of air return ports, S2 is the opening area of a single air return port, h is the length dimension of the second plate, the length direction of the second plate coincides with the axial direction of the cross-flow fan, g is the width dimension of the second plate, and the first side portion of the second plate connected to the first plate extends along the length direction of the second plate.

[0015] In some embodiments, the refrigeration device further includes an evaporator located above the first plate, an air mixing cavity is formed between the second plate and the top wall, and the cross-flow fan is configured to supply power so that the air flow in the cabinet flows into the air mixing cavity through the air return port, then flows from the air mixing cavity through the evaporator and the cross-flow fan, and finally flows into the cabinet through the air inlet.

[0016] In one aspect of the present disclosure, a refrigeration device is provided. The refrigeration device includes a cabinet and a cover plate disposed in the cabinet and adjacent to the top wall of the cabinet. The cover plate includes a first plate provided with a plurality of air inlets and a second plate connected to the first plate and located in a plane different from that of the first plate. A plurality of air return ports are provided on the second plate, and the ratio range of the total opening area of the plurality of air inlets to the total opening area of the plurality of air return ports is from 1:3 to 1:7.

[0017] In some embodiments, the air return port includes a first strip-shaped through hole, and the length extension direction of the first strip-shaped through hole coincides with the extension direction of the first side portion of the second plate, and the first side portion of the second plate is the side portion connected to the first plate.

[0018] In some embodiments, the air return opening includes an air deflector connected to a side of a first strip-shaped through hole away from the first plate, and the air deflector extends downward or upward from the cover plate.

[0019] In some embodiments, the air deflector extends downward from the cover plate to a side close to the first plate.

[0020] In some embodiments, the refrigeration device further includes a plurality of shelves arranged at intervals in the vertical direction within the cabinet, the cabinet includes a cabinet door, and the angle formed by the air deflector and the first line ОB is smaller than the angle formed by the second line OC and the first line OB. For the first line OB, the first point O is selected at the connection portion between the air deflector closest to the air return opening of the first plate and the first strip-shaped through hole, and the vertical line passing through the first point O is regarded as the first line OB. For the second line OC, the intersection point of the first line OB and the first shelf located at the uppermost layer among the plurality of shelves is the second point B, the shortest line between the first point O and the side of the first shelf farthest from the cabinet door is the third line OA, A is the third point A which is a point on the first shelf, the point between the third point A and the second point B is the fourth point C, and the connection line between the first point O and the fourth point C is the second line OC.

[0021] In some embodiments, the refrigeration device further includes a cross-flow fan disposed between the cover plate and the top wall of the cabinet. The cabinet includes a cabinet door. The cross-flow fan is disposed on one side facing the cabinet door. The first plate is farther from the cabinet door than the second plate. The first plate covers the cross-flow fan. The plurality of air inlets are arranged at intervals along the axial direction of the cross-flow fan. The region on one side of the first plate away from the second plate is the first region where the plurality of air inlets are provided. The area of the first region is e×f, where e is the length dimension e of the first region, the length dimension e is equal to or greater than the axial dimension of the cross-flow fan, and f is the width dimension f of the first region.

[0022] In some embodiments, the width dimension f is selected such that the fourth line DE, the fifth line DF, and the sixth line DG are each made on the radial section of the cross-flow fan starting from the center point D of the radial section of the cross-flow fan. The fourth line DE is perpendicular to the axis of the cross-flow fan. The included angles formed by the fourth line DE and the fifth line DF, the fourth line DE and the sixth line DG, and the fifth line DF and the sixth line DG are all 120 degrees. The fifth line DF extends along the direction away from the second plate. The tangent line FH is made at the intersection point F of the fifth line DF and the edge of the radial section of the cross-flow fan. The distance from the intersection point H of the tangent line FH and the first plate to the side of the first plate away from the second plate is equal to the width dimension f.

[0023] In some embodiments, (S1×n1) / (e×f)×100%≧55%, where n1 is the number of the plurality of air inlets and S1 is the opening area of a single air inlet.

[0024] In some embodiments, (S2×n2) / (g×h)×100%≧45%, where n2 is the number of a plurality of return air vents, S2 is the opening area of a single return air vent, h is the length dimension of the second plate, the length direction of the second plate coincides with the axial direction of the cross-flow fan, g is the width dimension of the second plate, and the first side portion of the second plate connected to the first plate extends along the length direction of the second plate.

[0025] In some embodiments, the refrigeration device further includes a cross-flow fan disposed between the cover plate and the top wall of the cabinet. The cabinet includes a cabinet door. The cross-flow fan is disposed on one side facing the cabinet door. The air supply port includes a second strip-shaped through hole, and the length extension direction of the second strip-shaped through hole is perpendicular to the axial direction of the cross-flow fan.

[0026] In some embodiments, the first plate is disposed horizontally, the first side portion of the second plate is connected to the first plate, and the second side portion of the second plate facing the first side portion is inclined upward so as to be connected to the top wall.

[0027] In some embodiments, the refrigeration device further includes an evaporator located above the first plate. An air mixing cavity is formed between the second plate and the top wall. The cross-flow fan is configured to supply power so that the air flow in the cabinet flows into the air mixing cavity through the return air vent, then flows from the air mixing cavity through the evaporator and the cross-flow fan, and finally flows into the cabinet through the air supply port.

[0028] Based on the above technical solutions, the present disclosure has at least the following advantageous effects. That is, In some embodiments, the cabinet includes a cabinet door, a plurality of shelves, and a cover plate. The plurality of shelves are arranged at intervals in the vertical direction within the cabinet. The cover plate is arranged within the cabinet adjacent to the top wall of the cabinet. The cover plate is provided with an air return port and an air deflector. The air deflector is connected with the side part of the air return port close to the cabinet door and extends obliquely downward. The angle formed by the air deflector and the first line OB is smaller than the angle formed by the second line OC and the first line OB. This angle reduces the entrained hot air, guarantees a sufficient air return volume, and may incorporate an aesthetic appearance.

[0029] The accompanying drawings described herein are incorporated herein by reference and constitute a part of this application, intended to provide a further understanding of the present disclosure. The exemplary embodiments and their descriptions of the present disclosure do not constitute an improper definition of the present disclosure.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0031] The technical solutions in the embodiments will be clearly and fully described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0032] In the description of the present disclosure, the terms of orientation or positional relationship such as "central", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside" based on the orientation or positional relationship shown in the drawings are not intended to indicate that the devices or elements shown in the present disclosure must be in a specific orientation and configured and operated in a specific orientation. Instead, it should be understood that they are only for the convenience of describing the present disclosure and simplifying the description, and as a result, it cannot be understood that the protection scope of the present disclosure is limited.

[0033] In some embodiments of the present disclosure, a refrigeration device is provided to reduce the problem of entraining hot air.

[0034] FIG. 1 is a schematic structural diagram of some embodiments of a refrigeration device according to the present disclosure. Referring to FIG. 1, in some embodiments, as shown in FIG. 1, the refrigeration device includes a cabinet 200, a cross-flow fan 400, and a cover plate 100.

[0035] The cabinet 200 includes a top wall 202, a first side wall 201, and a cabinet door 300. The first side wall 201 is disposed opposite to the cabinet door 300. The cabinet door 300 may be pivotally attached to the cabinet 200.

[0036] In some embodiments, the cabinet 200 further includes a bottom wall facing the top wall 202, and the direction between the top wall 202 and the bottom wall of the cabinet 200 is the height direction of the cabinet 200. The direction between the first side wall 201 of the cabinet 200 and the cabinet door 300 is the depth direction of the cabinet 200.

[0037] In some embodiments, the cabinet 200 further includes a second side wall and a third side wall that are disposed opposite to each other, and both the second side wall and the third side wall are connected to both the cabinet door 300 and the first side wall 201. The first side wall 201, the second side wall, the third side wall, the top wall 202, and the bottom wall surround a cavity having an opening. The cabinet door 300 is configured to seal the cavity, and the cabinet door 300 is opened to take out an item from the cavity or supply an item to the cavity. The direction between the second side wall and the third side wall is the length direction of the cabinet 200.

[0038] The cover plate 100 is disposed inside the cabinet 200 and is adjacent to the top wall 202 of the cabinet 200.

[0039] The cross-flow fan 400 is located inside the cabinet 200 between the cover plate 100 and the top wall 202 of the cabinet 200. The cross-flow fan 400 is disposed on one side facing the cabinet door 300, that is, adjacent to the first side wall 201. The axial direction of the cross-flow fan 400 coincides with the direction from the second side wall to the third side wall of the cabinet 200.

[0040] The cover plate 100 includes a first plate 1 and a second plate 2. A plurality of air inlets 3 are provided on the first plate 1. The second plate 2 is connected to the first plate 1 and is located in a plane different from that of the first plate 1. A plurality of air return openings 4 are provided on the second plate 2, and the range of the ratio of the total opening area of the plurality of air inlets 3 to the total opening area of the plurality of air return openings 4 is from 1:3 to 1:7. Preferably, the range of the ratio of the total opening area of the plurality of air inlets 3 to the total opening area of the plurality of air return openings 4 is 1:5.

[0041] If the total opening area of the air return openings 4 is too small, the hot air introduced after the cabinet door 200 is opened cannot properly enter the evaporator for cooling and can become hot in front of the cabinet door 200. If the total opening area of the air return openings 4 is too large, more hot air will be drawn into the cabinet from the outside when the cabinet door 200 is opened, and the load on the evaporator will increase. Therefore, the range of the ratio of the total opening area of the plurality of air inlets 3 to the total opening area of the plurality of air return openings 4 is from 1:3 to 1:7, which contributes to a uniform and stable flow rate and temperature in the air field and reduces energy consumption.

[0042] In this embodiment, the air inlets 3 and the air return openings 4 are integrated with the cover plate 100, which not only meets the need for air supply and return when the refrigeration device operates, but also incorporates the appearance of the refrigeration device, making the refrigeration device more aesthetically pleasing and enabling effective use of the volume inside the cabinet.

[0043] In some embodiments, the first plate 1 and the second plate 2 may be formed by bending the entire plate. Alternatively, the first plate 1 and the second plate are two independent plates, and the first plate 1 and the second plate 2 are joined to form the cover plate 100.

[0044] In some embodiments, the cover plate 100 may be formed of a sheet metal member, which may be flexibly manufactured according to the size of the refrigeration device during the manufacturing process, with good compatibility, so that there is no need to re-develop the mold, thereby reducing the mold development cost and solving the problem of high cost when it is necessary to modify the molds of different models of the cover plate 100 many times during the manufacturing process.

[0045] In the case of a large refrigeration device, in order to facilitate manufacturing and maintenance, the cover plate 100 can be assembled from a plurality of sheet metals that can be fixedly connected by screws. The cover plate 100 may be formed by bending a complete sheet metal, and the bent shape (including width and angle) is determined by the evaporator and the fan member.

[0046] In this embodiment, a cross-flow fan 400 is used, and the noise is smaller. The cross-flow fan 400 guarantees the air supply volume, reduces the hot air sucked in, and solves the problem that the noise caused by the operation process of the axial-flow fan itself is larger and more hot air is involved.

[0047] Referring to FIGS. 3 and 4, in some embodiments, the return air port 4 includes a first strip-shaped through hole 41, and the length extension direction of the first strip-shaped through hole 41 coincides with the length extension direction of the first side portion 21 of the second plate 2. The first side portion 21 of the second plate 2 is the side portion connected to the first plate 1. By providing the return air port 4 as the first strip-shaped through hole 41, the return air flow rate can be increased.

[0048] In some embodiments, a plurality of return air ports 4 are provided on the second plate 2 along the extension direction of the first side portion 21, and a plurality of return air ports are also provided along the direction perpendicular to the first side portion 21.

[0049] In some embodiments, a plurality of horizontal rows and a plurality of vertical rows of return air ports 4 are provided on the second plate 2.

[0050] In some embodiments, the air return port 4 further includes an air deflector 42 connected with one side portion of the first strip-shaped through hole 41 in a state of being separated from the first plate 1. The air deflector 42 extends downward from the cover plate 100 (see FIG. 3), or extends upward (not shown). The air deflector 42 is configured to deflect the return air flow.

[0051] In some embodiments, the air deflector 42 extends downward from the cover plate 100 to one side portion close to the first plate 1.

[0052] Referring to FIGS. 1 and 2, the refrigeration device also includes a plurality of shelves 500 arranged at intervals in the vertical direction within the cabinet 200. The air deflector 42 extends downward from the cover plate 100 to one side portion close to the first plate 1. That is, the opening of the air return port 4 faces toward one side portion of the shelf 500 facing the cabinet door 300. The air deflector 42 deflects the air flow, avoids the hot air sucked in when the cabinet door 300 is opened, reduces the hot air suction amount, and may reduce the influence of the hot air on the return air temperature.

[0053] The return air temperature may be maintained at a low temperature, which contributes to the operation of the refrigeration system and solves the problem that the performance of the refrigeration system is affected after the hot air introduced when the cabinet door 300 is opened is drawn into the air return port 4. Further, the air deflector 42 is inclined toward one side portion facing the cabinet door 300. As a result, it is also possible to shield the members (for example, the cross-flow fan, the evaporator, and the defrosting tray) arranged between the cover plate 100 and the top wall 202 of the cabinet 200, and improve the aesthetic appearance inside the refrigeration device.

[0054] In some embodiments, the air return port 4 uses a louvered air supply grid that can hide components such as the evaporator and the defrosting tray, enabling a more aesthetic appearance of the refrigeration device.

[0055] In some embodiments, the refrigeration device further includes a plurality of shelves 500 arranged at intervals in the vertical direction within the cabinet 200. The cabinet 200 includes a cabinet door 300.

[0056] Referring to FIGS. 2 and 3, the angle formed by the air deflector 42 and the first line OB is smaller than the angle (∠COB) formed by the second line OC and the first line OB.

[0057] Regarding the first line OB, the first point O is selected at the connection portion between the air deflector 42 and the first strip-shaped through hole 41, the air deflector 42 is disposed at one of the return air openings 4 closest to the first plate 1, and the vertical line passing through the first point O is regarded as the first line OB.

[0058] Regarding the second line OC, that is, the intersection of the first line OB and the first shelf 501 located at the uppermost layer of the plurality of shelves 500 is the second point B, the shortest connection line between the first point O and the side portion of the first shelf 501 farthest from the cabinet door 300 is the third line OA, A is the third point A which is a point on the first shelf 501, the point between the third point A and the second point B is the fourth point C, and the connection line between the first point O and the fourth point C is the second line OC.

[0059] The angle formed by the air deflector 42 and the first line OB is smaller than the angle ∠COB formed by the second line OC and the first line OB, thereby avoiding excessive hot air drawn into the evaporator 600 and the cross-flow fan 400, while ensuring sufficient return air being sucked in, having less hot air entrainment, and at the same time, a beautiful appearance may be incorporated.

[0060] In some embodiments, the refrigeration device further includes a cross-flow fan 400 disposed between the cover plate 100 and the top wall 202 of the cabinet 200. The cabinet 200 includes a cabinet door 300, and the cross-flow fan 400 is disposed on one side facing the cabinet door 300. The first plate 1 is farther from the cabinet door 300 than the second plate 2. The first plate 1 covers the cross-flow fan 400, and a plurality of air inlets 3 are arranged at intervals along the axial direction of the cross-flow fan 400.

[0061] Referring to FIG. 4, the area on one side of the first plate 1 away from the second plate 2 is the first area where the plurality of air inlets 3 are provided. The area of the first area is e×f, where e is the length dimension e of the first area, the length dimension e is equal to or greater than the axial dimension of the cross-flow fan 400, and f is the width dimension f of the first area.

[0062] The air inlets 3 are close to the first side wall 201 of the cabinet 200 and are located below the cross-flow fan 400. The length dimension e is equal to or greater than the axial dimension of the cross-flow fan 400, whereby it can be ensured that the air outlet from the cross-flow fan 400 can be timely supplied into the cabinet 200 through the air inlets 3.

[0063] Alternatively, the length dimension e is slightly larger than the axial dimension of the cross-flow fan 400.

[0064] Referring to FIG. 2, in some embodiments, a fourth line DE, a fifth line DF, and a sixth line DG are each created on a radial section of the cross-flow fan 400 starting from the center point D of the radial section of the cross-flow fan 400. The fourth line DE is perpendicular to the axis of the cross-flow fan 400. The angles formed by the fourth line DE and the fifth line DF, the fourth line DE and the sixth line DG, and the fifth line DF and the sixth line DG are all 120 degrees. The fifth line DF extends along a direction away from the second plate 2. A tangent line FH is created at the intersection point F of the fifth line DF and the edge of the radial section of the cross-flow fan 400. The distance from the intersection point H of the tangent line FH and the first plate 1 to the side portion of the first plate 1 away from the second plate 2 is equal to the width dimension f.

[0065] The length dimension e is equal to or greater than the axial dimension of the cross-flow fan 400. The width dimension f is equal to the distance from the intersection point H of the tangent line FH and the first plate 1 to the side portion of the first plate 1 away from the second plate 2. Thereby, it can be guaranteed that the air outlet from the cross-flow fan 400 can be timely supplied into the cabinet 200 through the air supply port 3.

[0066] Alternatively, the length dimension e is equal to the maximum distance between two air supply ports 3 at the farthest distance, and the width dimension f is equal to the maximum distance between the air supply port 3 and the side portion of the first plate 1 away from the second plate 2.

[0067] Referring to FIG. 4, in some embodiments, (S1×n1) / (e×f)×100%≧55%, where n1 is the number of the plurality of air supply ports 3, and S1 is the opening area of a single air supply port 3.

[0068] Referring to FIG. 4, in some embodiments, (S2×n2) / (g×h)×100%≧45%, where n2 is the number of a plurality of return air vents 4, S2 is the opening area of a single return air vent 4, h is the length dimension of the second plate 2, the length direction of the second plate 2 coincides with the axial direction of the cross-flow fan 400, g is the width dimension of the second plate 2, and the first side portion 21 of the second plate 2 connected to the first plate 1 extends along the length direction of the second plate 2.

[0069] The specific values of the parameters e, f, g, and h may be determined according to the dimensions of the fan and the refrigeration device.

[0070] In some embodiments, the refrigeration device further includes a cross-flow fan 400 disposed between the cover plate 100 and the top wall 202 of the cabinet 200. The cabinet 200 includes a cabinet door 300, and the cross-flow fan 400 is disposed on one side facing the cabinet door 300. The air supply port 3 includes a second strip-shaped through hole 31, and the length extension direction of the second strip-shaped through hole 31 is perpendicular to the axial direction of the cross-flow fan 400.

[0071] The air supply port 3 is designed to have a second strip-shaped through hole 31 with an appropriate size, and the plane of the second strip-shaped through hole 31 is perpendicular to the plane of the air flow direction. That is, the plane of the opening of the air supply port 3 cuts the air field at a right angle, thereby enabling more uniform air supply in the cabinet, and solving the problem that if the air supply port is too large, the air field is likely to be disturbed and the air supply is not uniform.

[0072] Through experiments, it is demonstrated that the shape, number, and ratio of the length dimension to the area dimension of the opening of the air supply port 3 provided by the embodiments of the present disclosure may ensure a uniform and stable air flow for air supply.

[0073] Referring to FIGS. 1, 2 and 5, in some embodiments, the first plate 1 is disposed horizontally, the first side portion 21 of the second plate 2 is connected to the first plate 1, and the second side portion 22 of the second plate 2 opposite to the first side portion 21 is inclined upwardly so as to be connected to the top wall 202.

[0074] Referring to FIG. 5, the cover plate 100 includes the first plate 1 and the second plate 2, that is, it consists of a horizontal plane and an inclined plane. The cover plate 100 covers the top wall 202 of the entire refrigeration device 200, thereby solving the problem that members such as the cross-flow fan 400, the evaporator 600, and the defrosting tray are exposed and affect the aesthetic appearance. The defrosting tray is generally disposed below the evaporator 600.

[0075] By using the shape, number, and the ratio of the length dimension to the area dimension of the air supply port and the air return port openings provided by this embodiment, an optimal effect for air supply and air return in the cabinet can be achieved.

[0076] In some embodiments, the refrigeration device further includes an evaporator 600 located above the first plate 1, and an air mixing cavity 700 is formed between the second plate 2 and the top wall 202. The cross-flow fan 400 is configured to supply power so that the air flow in the cabinet 200 flows through the air return port 4 into the air mixing cavity 700, then flows from the air mixing cavity 700 through the evaporator 600 and the cross-flow fan 400, and finally flows into the cabinet 200 through the plurality of air supply ports 3.

[0077] The air mixing cavity 700 is formed between the second plate 2 and the top wall 20 so that the air mixing cavity 700 can uniformly mix the air return, and the mixed air return is sucked into the evaporator 600.

[0078] In some specific embodiments, the material of the cover plate 100 is sheet metal. In order to match the color inside the cabinet, the cover plate 100 needs to be sprayed with a matching color.

[0079] In the case of a large refrigeration device, in order to facilitate manufacturing and maintenance, the cover plate 100 may be assembled from a plurality of sheet metals that can be fixedly connected by screws. The cover plate 100 may also be formed by bending a complete sheet metal, and the bent shape (including width and angle) is determined by the evaporator and the fan member.

[0080] In order to facilitate the fixed connection of the cover plate 100 using other members in the refrigeration device, the cover plate 100 may be bent and perforated as required. For example, the rectangular groove of the bent part in FIG. 5 is designed to match the beam of the cabinet door, and the round holes in the air return grid are designed to connect the lamp wires, and several screw holes or rivet holes are provided.

[0081] As shown in FIG. 5, the air supply port 3 and the air return port 4 are located on the same sheet metal. The air supply port 3 is designed within the shape of a through hole, and the shape of the through hole may effectively prevent the insertion of external objects (such as fingers) into the air supply port 3. At the same time, the shape of the air supply port 3 contributes to the uniform supply of cold air into the refrigeration device. The air return port 4 is designed to be louver-shaped and may hide members such as the evaporator and the defrosting tray that can be seen from the outside of the cabinet, enabling a more aesthetic appearance of the refrigeration device. At the same time, it reduces the entrained hot air so that an advantageous effect occurs on the refrigeration system.

[0082] The number of openings of the air return port 4 and the air supply port 3 is not limited, but preferably follows the following rules.

[0083] The ratio of the total opening area of the plurality of air supply ports 3 to the total opening area of the plurality of air return ports 4 is 1:5, that is, (S1×n1):(S2×n2)=1:5. The relationship between the total opening area of the plurality of air supply ports 3 and the area of the opening region is (S1×n1) / (e×f)×100%≧55%. The relationship between the total opening area of the plurality of air return ports 4 and the area of the opening region is (S2×n2) / (g×h)×100%≧45%.

[0084] In some embodiments, a refrigeration device is provided. The refrigeration device includes a cabinet 200 including a cabinet door 300, a plurality of shelves 500 arranged at intervals in the vertical direction within the cabinet 200, and a cover plate 100 arranged within the cabinet 200 and adjacent to the top wall 202 of the cabinet 200. The cover plate 100 is provided with an air return port 4 and an air deflector 42. The air deflector 42 is connected in a state where the side portion of the air return port 4 is close to the cabinet door 300 and extends obliquely downward. The angle formed by the air deflector 42 and the first line ОB is smaller than the angle formed by the second line OC and the first line OB. Regarding the first line OB, the first point O is selected at the connection portion between the air return port 4 and the air deflector 42, and the vertical line passing through the first point O is regarded as the first line OB. Regarding the second line OC, the intersection point of the first line OB and the first shelf 501 located at the uppermost layer among the plurality of shelves 500 is the second point B. The shortest line between the first point O and the side portion of the first shelf 501 farthest from the cabinet door 300 is the third line OA, where A is the third point A which is a point on the first shelf 501. The point between the third point A and the second point B is the fourth point C. The connection line between the first point O and the fourth point C is the second line OC.

[0085] In some embodiments, the angle formed by the air deflector 42 and the first line ОB is smaller than the angle formed by the second line OC and the first line OB, and this angle may reduce the entrained hot air, ensure a sufficient return air volume, and also incorporate an aesthetic appearance.

[0086] In some embodiments, the cover plate 100 includes a first plate 1 provided with an air supply port 3, a second plate 2 connected to the first plate 1 and located in a plane different from that of the first plate 1, wherein the return air port 4 is disposed on the second plate 2.

[0087] In some embodiments, the return air port 4 includes a first strip-shaped through hole 41, and the length extension direction of the first strip-shaped through hole 41 coincides with the extension direction of the first side portion 21 of the second plate 2, and the first side portion 21 of the second plate 2 is the side portion connected to the first plate 1.

[0088] In some embodiments, the first plate 1 is farther away from the cabinet door 300 than the second plate 2.

[0089] In some embodiments, the first plate 1 is disposed horizontally, the first side portion 21 of the second plate 2 is connected to the first plate 1, and the second side portion 22 of the second plate 2 opposite to the first side portion 21 is inclined upward so as to be connected to the top wall 202.

[0090] In some embodiments, the refrigeration device further includes a cross-flow fan 400 disposed between the cover plate 100 and the top wall 202 of the cabinet 200 and located on one side facing the cabinet door 300. The first plate 1 covers the cross-flow fan 400.

[0091] In some embodiments, the first plate 1 is provided with a plurality of air inlets 3 arranged at intervals along the axial direction of the cross-flow fan 400. The region on one side of the first plate 1 away from the second plate 2 is the first region where the plurality of air inlets 3 are provided. The area of the first region is e×f, where e is the length dimension e of the first region, the length dimension e is equal to or greater than the axial dimension of the cross-flow fan 400, and f is the width dimension f of the first region.

[0092] In some embodiments, the width dimension f is selected such that the fourth line DE, the fifth line DF, and the sixth line DG are each made on the radial section of the cross-flow fan 400 starting from the center point D of the radial section of the cross-flow fan 400. The fourth line DE is perpendicular to the axis of the cross-flow fan 400. The angles formed by the fourth line DE and the fifth line DF, the fourth line DE and the sixth line DG, and the fifth line DF and the sixth line DG are all 120 degrees. The fifth line DF extends along the direction away from the second plate 2, and the tangent line FH is made at the intersection point F of the fifth line DF and the edge of the radial section of the cross-flow fan 400. The distance from the intersection point H of the tangent line FH and the first plate 1 to the side of the first plate 1 away from the second plate 2 is equal to the width dimension f.

[0093] In some embodiments, (S1×n1) / (e×f)×100%≧55%, where n1 is the number of the plurality of air inlets 3 and S1 is the opening area of a single air inlet 3.

[0094] In some embodiments, the air inlet 3 includes a second strip-shaped through hole 31, and the length extension direction of the second strip-shaped through hole 31 is perpendicular to the axial direction of the cross-flow fan 400.

[0095] In some embodiments, the second plate 2 is provided with a plurality of air return openings 4, and (S2×n2) / (g×h)×100%≧45%, where n2 is the number of air return openings 4, S2 is the opening area of a single air return opening 4, h is the length dimension of the second plate 2, the length direction of the second plate 2 coincides with the axial direction of the cross-flow fan 400, g is the width dimension of the second plate 2, and the first side portion 21 of the second plate 2 connected to the first plate 1 extends along the length direction of the second plate 2.

[0096] In some embodiments, the refrigeration device further includes an evaporator 600 located above the first plate 1. An air mixing cavity 700 is formed between the second plate 2 and the top wall 202, and the cross-flow fan 400 is configured to supply power so that the air flow in the cabinet 200 flows into the air mixing cavity 700 through the air return openings 4, then flows from the air mixing cavity 700 through the evaporator 600 and the cross-flow fan 400, and finally flows into the cabinet 200 through the air supply openings 3.

[0097] In the description of the present disclosure, it should be understood that the expressions such as "first", "second", and "third" used to define components are only intended to make it easier to distinguish the above components. Unless otherwise specified, the above expressions have no specific meaning and thus cannot be understood as limiting the protection scope of the present disclosure.

[0098] Based on the above-described embodiments of the present utility model, the technical features of one of the above-described embodiments may be advantageously combined with one or more other embodiments if there is no obvious negation.

[0099] Finally, it should be noted that the above embodiments are not intended to limit the technical solutions of the present disclosure, but only to explain them. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art can still make modifications to the embodiments of the present disclosure or make equivalent substitutions for some of the technical features, and all of these should be understood to be included within the scope of the technical solutions sought to be protected in the present disclosure without departing from the spirit of the disclosed technical solutions.

Claims

1. A cabinet (200) having a cabinet door (300), a plurality of shelves (500) arranged at intervals in the vertical direction within the cabinet (200), a cover plate (100) disposed within the cabinet (200) and adjacent to the top wall (202) of the cabinet (200), the cover plate (100) being provided with a return air opening (4) and an air deflector (42), the air deflector (42) being connected in a state where a side portion of the return air opening (4) is close to the cabinet door and extending obliquely downward, and an angle formed by the air deflector (42) and a first line OB being smaller than an angle formed by a second line OC and the first line OB, the cover plate (100), Regarding the first line OB, a first point O is selected at a connection portion between the return air opening (4) and the air deflector (42), and a vertical line passing through the first point O is regarded as the first line OB, Regarding the second line OC, an intersection point of the first line OB and a first shelf (501) located at the uppermost layer among the plurality of shelves (500) is a second point B, and a shortest line between the first point O and a side portion of the first shelf (501) farthest from the cabinet door (300) is a third line OA, A is a third point A which is a point on the first shelf (501), a point between the third point A and the second point B is a fourth point C, and a connection line between the first point O and the fourth point C is the second line OC, a refrigeration device.

2. The cover plate (100) includes a first plate (1) provided with an air supply opening (3), a second plate (2) connected to the first plate (1) and located in a plane different from that of the first plate (1), the return air opening (4) being disposed on the second plate (2), the second plate (2), the refrigeration device according to claim 1.

3. The return air opening (4) includes a first strip-shaped through hole (41), a length extension direction of the first strip-shaped through hole (41) being coincident with an extension direction of a first side portion (21) of the second plate (2), the first side portion (21) of the second plate (2) being a side portion connected to the first plate (1), the refrigeration device according to claim 2.

4. The refrigeration device according to claim 2 or 3, wherein the first plate (1) is farther away from the cabinet door (300) than the second plate (2).

5. The first plate (1) is arranged horizontally, the first side portion (21) of the second plate (2) is connected to the first plate (1), and the second side portion (22) of the second plate (2) facing the first side portion (21) is inclined upward so as to be connected to the top wall (202). The refrigeration device according to any one of claims 2 to 4.

6. The refrigeration device further comprises a cross-flow fan (400) disposed between the cover plate (100) and the top wall (202) of the cabinet (200) and located on one side facing the cabinet door (300), and the first plate (1) covers the cross-flow fan (400). The refrigeration device according to any one of claims 2 to 5.

7. The first plate (1) is provided with a plurality of air supply ports (3) arranged at intervals along the axial direction of the cross-flow fan (400). The region on one side portion of the first plate (1) away from the second plate (2) is a first region where the plurality of air supply ports (3) are provided. The area of the first region is e×f, e is the length dimension e of the first region, the length dimension e is equal to or larger than the axial dimension of the cross-flow fan (400), and f is the width dimension f of the first region. The refrigeration device according to claim 6.

8. The width dimension f is selected such that the fourth line DE, the fifth line DF, and the sixth line DG each originate from the center point D of the radial section of the cross-flow fan (400) and are formed on the radial section of the cross-flow fan (400). The fourth line DE is perpendicular to the axis of the cross-flow fan (400). The included angles formed by the fourth line DE and the fifth line DF, the fourth line DE and the sixth line DG, and the fifth line DF and the sixth line DG are all 120 degrees. The fifth line DF extends along the direction away from the second plate (2). The tangent FH is formed at the intersection point F between the fifth line DF and the edge of the radial section of the cross-flow fan (400). The distance from the intersection point H between the tangent FH and the first plate (1) to the side portion of the first plate (1) away from the second plate (2) is equal to the width dimension f. The refrigeration device according to claim 7.

9. (S1 × n1) / (e × f) × 100% ≥ 55%, where n1 is the number of the plurality of air supply ports (3), and S1 is the opening area of a single air supply port (3). The refrigeration device according to claim 7 or 8.

10. The air supply port (3) includes a second strip-shaped through hole (31), and the length extension direction of the second strip-shaped through hole (31) is perpendicular to the axial direction of the cross-flow fan (400). The refrigeration device according to any one of claims 6 to 9.

11. A plurality of air return ports (4) are provided on the second plate (2), (S2 × n2) / (g × h) × 100% ≥ 45%, where n2 is the number of the plurality of air return ports (4), S2 is the opening area of a single air return port (4), h is the length dimension of the second plate (2), the length direction of the second plate (2) coincides with the axial direction of the cross-flow fan (400), g is the width dimension of the second plate (2), and the first side portion (21) of the second plate (2) connected to the first plate (1) extends along the length direction of the second plate (2). The refrigeration device according to any one of claims 6 to 10.

12. The refrigeration device according to any one of claims 6 to 11, further comprising an evaporator (600) located above the first plate (1), an air mixing cavity (700) being formed between the second plate (2) and the top wall (202), the cross-flow fan (400) being configured to supply power so that the air flow in the cabinet (200) flows into the air mixing cavity (700) through the return air opening (4), then flows from the air mixing cavity (700) through the evaporator (600) and the cross-flow fan (400), and finally flows into the cabinet (200) through the supply air opening (3).

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