Refrigeration system flow channel structure and refrigerator

Abstract

The present invention provides a refrigeration system flow channel structure and a refrigerator. The refrigeration system flow channel structure includes a chamber, a return air channel, and a guide structure. The chamber has a first side wall and a second side wall located in a first direction and arranged opposite each other, and two end walls located in a second direction and at both ends of the first and second side walls. The wall portion of the chamber is provided with an air outlet and a return air port spaced apart in the second direction. An evaporator is provided in the chamber between the air outlet and the return air port, wherein the return air port is provided on the first side wall; one end of the return air channel is used to connect to the chamber, and the other end is used to connect to the return air port; the guide structure is provided at the intersection of the chamber and the return air channel to guide the airflow from the return air port toward the first side wall. This solution allows the airflow from the return air port to flow evenly within the chamber, thereby improving the cooling effect, avoiding severe local frosting of the evaporator and uneven defrosting, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a refrigeration system flow channel structure and a refrigerator. Background Art

[0002] Traditional air-cooled refrigerators primarily use a fan to blow cold air into the refrigerator, exchanging heat with the warm air inside to lower the refrigerator's temperature. This fan, which drives air flow within the refrigerator, allows for rapid cooling, excellent temperature uniformity, and automatic defrosting, making it very convenient to use. However, traditional air-cooled refrigerators suffer from uneven return air flow, resulting in uneven defrosting and a poor user experience. Summary of the Invention

[0003] The main purpose of the present invention is to provide a refrigeration system flow channel structure and a refrigerator, aiming to solve the technical problem that traditional air-cooled refrigerators have uneven return air flow, resulting in uneven defrosting and affecting user experience.

[0004] To achieve the above objectives, the present invention provides a refrigeration system flow channel structure, comprising:

[0005] A chamber, the chamber having a first side wall and a second side wall located in a first direction and arranged opposite to each other, and two end walls located in a second direction and located at both ends of the first side wall and the second side wall, the wall portion of the chamber being provided with an air outlet and an air return outlet spaced apart in the second direction, an evaporator being provided in the chamber between the air outlet and the return outlet, wherein the return outlet is provided on the first side wall;

[0006] a return air passage, one end of which is connected to the compartment and the other end of which is connected to the return air outlet; and

[0007] The guide structure is provided at the junction of the chamber and the return air channel, and is used to guide the airflow from the return air port toward the direction close to the first side wall.

[0008] Optionally, the guide structure includes guide blades, which are arranged in the chamber and adjacent to the return air outlet, for guiding the airflow from the return air outlet toward a direction close to the first side wall.

[0009] Optionally, the guide blades extend along the first direction and are inclined toward the side where the air outlet is located.

[0010] Optionally, the inclination angle between the guide blade and the first direction is α, 35°≤α≤45°.

[0011] Optionally, the guide blade is arranged with an arc-shaped concave surface on a side facing the air outlet; and / or,

[0012] The guide blade is arranged in an arc-shaped convex surface on a side facing away from the air outlet.

[0013] Optionally, a plurality of guide blades are provided, and the plurality of guide blades are arranged at intervals along the second direction.

[0014] Optionally, in a direction away from the air outlet, the multiple guide blades are arranged gradually away from the return air outlet in sequence, so that the arrangement direction of the multiple guide blades is inclined to the second direction.

[0015] Optionally, the inclination angle between the arrangement direction of the plurality of guide blades and the second direction is β, 20°≤β≤30°.

[0016] Optionally, the length of the guide blade is a, the distance between two adjacent guide blades is b, and b / a≤0.75.

[0017] Optionally, the length of the guide blade is a, the diameter of the evaporator is c, and 1.5≤a / c≤2.

[0018] Optionally, the guide vane is located between the evaporator and the first side wall, and is arranged close to the first side wall.

[0019] Optionally, the guide structure includes a guide protrusion provided on the inner wall of the return air channel, the guide protrusion is provided close to the return air outlet, and the side away from the inner wall of the return air channel is provided in an arc-shaped convex surface.

[0020] Optionally, the guide structure includes a heating pipe, which is arranged at a position in the chamber corresponding to the return air outlet and is arranged side by side with the evaporator.

[0021] Optionally, the heating tube is located between the evaporator and the first side wall, and is arranged close to the first side wall.

[0022] Optionally, the evaporator and the return air outlet are spaced apart along the second direction, and the heating pipe is arranged between the center position of the return air outlet and the evaporator, and is arranged close to the center position of the return air outlet.

[0023] In addition, the present invention also provides a refrigeration system flow channel structure, including:

[0024] A chamber, the chamber having a first side wall and a second side wall located in a first direction and arranged opposite to each other, and two end walls located in a second direction and located at both ends of the first side wall and the second side wall, the wall portion of the chamber being provided with an air outlet and an air return outlet spaced apart in the second direction, an evaporator being provided in the chamber between the air outlet and the return outlet, wherein the return outlet is provided on the first side wall;

[0025] A return air channel, one end of which is connected to the compartment and the other end of which is connected to the return air outlet;

[0026] Wherein, the width of the return air outlet is h, 20mm≤h≤45mm.

[0027] In addition, the present invention also provides a refrigerator comprising the refrigeration system flow channel structure as described in any one of the above.

[0028] In this solution, a return air inlet and an air outlet are provided on the wall of the chamber. One end of the return air channel is connected to the compartment, and the other end is connected to the return air inlet. That is, the cold air in the refrigeration system compartment is transported to the chamber through the return air inlet through the return air channel to improve the cooling efficiency. At the same time, the airflow from the return air inlet is guided in a direction close to the first side wall by the guide structure, so that the airflow from the return air inlet can flow evenly in the chamber, thereby improving the cooling effect and avoiding severe local frosting of the evaporator and uneven defrosting, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 A schematic cross-sectional view of a first embodiment of a flow channel structure of a refrigeration system provided by the present invention;

[0031] Figure 2 for Figure 1 A schematic cross-sectional view of a plurality of guide blades;

[0032] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the middle guide blade;

[0033] Figure 4 A schematic cross-sectional view of a second embodiment of the flow channel structure of a refrigeration system provided by the present invention;

[0034] Figure 5 for Figure 4 A magnified schematic diagram of point A in the middle;

[0035] Figure 6 A schematic cross-sectional view of a third embodiment of the flow channel structure of a refrigeration system provided by the present invention;

[0036] Figure 7 for Figure 6 A magnified schematic diagram of point B in the middle;

[0037] Figure 8 A schematic cross-sectional view of a fourth embodiment of the flow channel structure of a refrigeration system provided by the present invention;

[0038] Figure 9 A schematic diagram of the three-dimensional structure of a refrigerator according to an embodiment of the present invention;

[0039] Figure 10 for Figure 9 Schematic cross-sectional view of a refrigerator.

[0040] Description of Figure Numbers:

[0041] Label name Label name 100 Refrigeration system flow channel structure 2 Return air duct 1 chamber 3 diversion structure 11 First side wall 31 guide blades 12 Second side wall 32 Diversion protrusion 13 end wall 33 Heating tube 1a Return air vent 200 refrigerator 1b air outlet 210 compartment 14 evaporator

[0042] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] It should be noted that if a directional indication is involved in an embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] Traditional air-cooled refrigerators primarily use a fan to blow cold air into the refrigerator, exchanging heat with the warm air inside to lower the refrigerator's temperature. This fan, which drives air flow within the refrigerator, allows for rapid cooling, excellent temperature uniformity, and automatic defrosting, making it very convenient to use. However, traditional air-cooled refrigerators suffer from uneven return air flow, resulting in uneven defrosting and a poor user experience.

[0047] In view of this, the present invention provides a refrigeration system flow channel structure and a refrigerator, aiming to solve the technical problem that traditional air-cooled refrigerators have uneven return air flow, resulting in uneven defrosting and affecting user experience. Figures 1 to 10 This is a specific embodiment of the refrigeration system flow channel structure and refrigerator provided by the present invention.

[0048] It should be noted that in traditional air-cooled refrigerators, cold air from the compartment is circulated back into the chamber for cooling, improving cooling efficiency. In traditional air-cooled refrigerators, when airflow from the return air vent is directly delivered to the chamber, since the return air vent is typically positioned directly in relation to the evaporator 14 to deliver the airflow to the location where the evaporator 14 is located, uneven return airflow can occur within the chamber. Specifically, the airflow can self-circulate in certain areas of the evaporator 14, leading to severe frosting in certain areas of the evaporator 14 and uneven defrosting. Because the thermal conductivity of frost is very low, only one percent or even several hundredths of that of metal, the frost layer creates a significant thermal resistance. A thick frost layer, acting as insulation, prevents the cold air in the evaporator from dissipating, affecting the evaporator's cooling efficiency and ultimately preventing the cold storage from reaching the desired temperature. Furthermore, the evaporation of the refrigerant within the evaporator is also weakened, and incompletely evaporated ammonia liquid may be sucked into the compressor, causing liquid hammer and impacting the user experience.

[0049] See also Figure 1 、 Figure 9 and Figure 10The refrigeration system flow channel structure 100 provided by the present invention includes a chamber 1, a return air channel 2 and a guide structure 3, the chamber 1 has a first side wall 11 and a second side wall 12 located in a first direction and opposite to each other, and two end walls 13 located in a second direction and located at both ends of the first side wall 11 and the second side wall 12, the wall portion of the chamber 1 is provided with an air outlet 1b and a return air channel 1a spaced apart in the second direction, an evaporator 14 is provided in the chamber 1 between the air outlet 1b and the return air channel 1a, wherein the return air channel 1a is provided on the first side wall 11; one end of the return air channel 2 is used to communicate with the compartment 210, and the other end is connected to the return air channel 1a; the guide structure 3 is provided at the intersection of the chamber 1 and the return air channel 2, for guiding the airflow from the return air channel 1a toward the direction close to the first side wall 11.

[0050] In this solution, a return air port 1a and an air outlet 1b are provided on the wall of the chamber 1, and one end of the return air channel 2 is connected to the compartment 210, and the other end is connected to the return air port 1a, that is, the cold air in the compartment 210 of the refrigerator 200 is transported to the chamber 1 through the return air port 1a through the return air channel 2, so as to improve the refrigeration efficiency. At the same time, the airflow from the return air port 1a is guided toward the direction close to the first side wall 11 by the guide structure 3, so that the airflow from the return air port 1a can flow evenly in the chamber 1, thereby improving the refrigeration effect and avoiding severe local frost and uneven defrosting of the evaporator 14, thereby improving the user experience.

[0051] It should be noted that the first direction is not limited and can be a direction on a horizontal plane or a direction on a vertical plane. The first direction is used to indicate the arrangement direction of the first side wall 11 and the second side wall 12, and the second direction is used to indicate the arrangement direction of the two end walls 13. Specifically, in this embodiment, the first direction is the width direction of the chamber 1, and the second direction is the height direction of the chamber 1. It can be understood that this directional indication is only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. In addition, the refrigeration system flow channel structure 100 provided by the present invention is not limited to refrigerators.

[0052] Further, see Figures 1 to 3In the first embodiment, the guide structure 3 includes guide vanes 31. The guide vanes 31 are disposed within the chamber 1 and adjacent to the return air port 1a to guide the airflow from the return air port 1a toward the first sidewall 11. In this embodiment, the guide vanes 31 guide the airflow from the return air port 1a toward the first sidewall 11, preventing the airflow from flowing in a localized direction within the chamber 1 and improving airflow uniformity.

[0053] It should be noted that, by utilizing the flow guiding effect generated by the guide blade 31, the guide blade 31 is set at the corresponding position of the return air outlet 1a, and the flow direction of the airflow is adjusted according to the angle of the guide blade 31. At the same time, the shape of the guide blade 31 can correspondingly reduce the pressure of the fluid, so that the airflow can diffuse in the chamber 1 and achieve the purpose of uniform airflow.

[0054] For further information, see Figure 2 To improve the guide blades 31's ability to direct the airflow from the return air port 1a toward the first sidewall 11, in this embodiment, the guide blades 31 extend along the first direction and are tilted toward the air outlet 1b. This allows the side of the guide blades 31 closest to the air outlet 1b to face the first sidewall 11. This ensures that airflow passing through the guide blades 31 facing the first sidewall 11 is directed toward the first sidewall 11, ensuring the effective flow guidance of the guide blades 31.

[0055] Specifically, see Figure 2 When the inclination angle between the guide blades 31 and the first direction is too large, the airflow from the guide blades 31 will flow from the return air inlet 1a to the evaporator 14, reducing the cooling effect. When the inclination angle between the guide blades 31 and the first direction is too large or too small, the airflow from the return air inlet 1a to the direction close to the first sidewall 11 cannot be effectively guided. When the inclination angle between the guide blades 31 and the first direction is α, 35°≤α≤45°, the airflow to the evaporator 14 is not blocked, thus ensuring the cooling effect, while also providing a good guiding effect to improve airflow uniformity.

[0056] In order to further improve the guiding effect of the guide blade 31, the guide blade 31 is arranged in an arc-shaped concave surface on the side facing the air outlet 1b; and / or, the guide blade 31 is arranged in an arc-shaped convex surface on the side facing away from the air outlet 1b. Figure 2 and Figure 3In this embodiment, the guide blades 31 may be arranged with an arcuate concave surface on the side facing the air outlet 1b, or with an arcuate convex surface on the side facing away from the air outlet 1b. Alternatively, the guide blades 31 may be arranged with an arcuate concave surface on the side facing the air outlet 1b, or with an arcuate convex surface on the side facing away from the air outlet 1b. This is not limited to any specific configuration, as long as the ability to guide the airflow toward the first sidewall 11 is improved.

[0057] Preferably, in this embodiment, the guide blade 31 is arranged in an arcuate concave surface on the side facing the air outlet 1b, and in an arcuate convex surface on the side facing away from the air outlet 1b. Specifically, the cross section of the guide blade 31 is arranged in a NACA 6409 airfoil shape.

[0058] It should be noted that the NACA airfoil is a series of airfoils developed by the National Advisory Committee for Aeronautics (NACA). Each airfoil is designated by the letters "NACA" followed by a number. Substituting the geometric parameters described by these numbers into a specific equation yields the airfoil's precise shape. Compared to earlier airfoils, these airfoils have a higher maximum lift coefficient and a lower drag coefficient.

[0059] Specifically, NACA 6409 indicates that the relative camber of the airfoil is 6%, the maximum camber position is at 0.4 of the chord length, and the relative thickness is 9%.

[0060] Further, see Figure 1 and Figure 2 The guide blades 31 are provided in plurality, and are spaced apart along the second direction. The provision of multiple guide blades 31 enhances the flow guidance effect. It is understood that the number of guide blades 31 is not limited, as long as it enhances the flow guidance capability of the flow guidance structure 3. Two or three guide blades may be provided. Specifically, in this embodiment, four guide blades 31 are provided, spaced apart along the second direction.

[0061] Furthermore, in a direction away from the air outlet 1b, the plurality of guide blades 31 are arranged gradually away from the return air outlet 1a, so that the arrangement direction of the plurality of guide blades 31 is inclined with respect to the second direction. This provides a more layered arrangement of the plurality of guide blades 31, allowing the airflow from the return air outlet 1a to have a larger diffusion space as it flows through each of the guide blades 31, allowing the airflow to further diffuse within the chamber 1 and improving the uniformity of the airflow.

[0062] Specifically, see Figure 2When the angle of inclination between the arrangement direction of the plurality of guide blades 31 and the second direction is too large, the guide blades 31 farther from the first sidewall 11 cannot effectively guide the airflow. When the angle of inclination between the arrangement direction of the plurality of guide blades 31 and the second direction is too small, the airflow flowing to the side of the plurality of guide blades 31 farther from the first sidewall 11 cannot be effectively diffused. However, when the angle of inclination between the arrangement direction of the plurality of guide blades 31 and the second direction is β, 20°≤β≤30°, the guide blades 31 farther from the first sidewall 11 can effectively guide the airflow, and the airflow flowing to the side of the plurality of guide blades 31 farther from the first sidewall 11 can be effectively diffused.

[0063] Further, see Figure 2 To maximize the flow-guiding efficiency of the guide blades 31, the length of the guide blades 31 is a, and the distance between two adjacent guide blades 31 is b, with b / a ≤ 0.75. This prevents excessive spacing between the guide blades 31, which could cause airflow from the return air port 1a to flow directly between two adjacent guide blades 31 toward the evaporator 14 and reduce the flow-guiding effect of the guide structure 3. It should be understood that the length of the guide blades 31 refers to the length of the guide blades 31 in the direction of the airflow.

[0064] Furthermore, to ensure that the flow-guiding capacity of the guide blades 31 is compatible with the cooling efficiency of the evaporator 14, in this embodiment, the length of the guide blades 31 is a, the diameter of the evaporator 14 is c, and 1.5 ≤ a / c ≤ 2, thereby achieving a better cooling effect. Similarly, the length of the guide blades 31 refers to the length of the guide blades 31 in the direction of the airflow.

[0065] It is understood that when the a / c ratio is too large, that is, when the length of the guide vanes 31 is too large relative to the diameter of the evaporator 14, the guide vanes 31 will block the airflow to the evaporator 14, thereby reducing the cooling effect. When the a / c ratio is too small, that is, when the length of the guide vanes 31 is too small relative to the diameter of the evaporator 14, the guide vanes 31 will not effectively guide the airflow. When 1.5 ≤ a / c ≤ 2 is satisfied, the guide vanes 31 can effectively guide the airflow without blocking the airflow to the evaporator 14, thereby achieving a better cooling effect.

[0066] Furthermore, in order to ensure that the airflow, after passing through the guide vanes 31, flows toward the first sidewall 11 while having a suitable diffusion path, so as to flow to more spaces and improve the diffusion effect of the airflow, the guide vanes 31 are located between the evaporator 14 and the first sidewall 11 and are disposed close to the first sidewall 11. Specifically, the distance from the evaporator 14 to the first sidewall 11 is d, and the distance from the guide vanes 31 to the first sidewall 11 is e, where e / d ≤ 0.5. This provides more room for airflow diffusion, allowing the airflow from the return air port 1a to flow more evenly within the chamber 1.

[0067] Further, see Figure 4 and Figure 5 In the second embodiment, the guide structure 3 includes a guide protrusion 32 provided on the inner wall of the return air duct 2. The guide protrusion 32 is provided near the return air port 1a and has an arc-shaped convex surface on the side away from the inner wall of the return air duct 2. This solution allows the airflow from the return air port 1a to flow along the arc-shaped convex surface of the guide protrusion 32. Since the fluid will produce a diffusion effect when flowing from a narrow area to a wide area, the airflow can be better diffused within the chamber 1 when it flows from the side of the guide protrusion 32 away from the return air port 1a to the side close to the return air port 1a, thereby achieving a uniform airflow and improving the return air resistance.

[0068] Specifically, to enhance the airflow diffusion effect of the guide protrusion 32, in this embodiment, one end of the guide protrusion 32 is adjacent to the return air port 1a, and the other end is located within the return air duct 2. Furthermore, the guide protrusion 32 is disposed on the inner wall of the return air duct 2 near the air outlet 1b, so that the airflow, when passing through the guide protrusion 32, can diffuse toward the first side wall 11 while also diffusing as much as possible toward the end wall 13 near the return air port 1a.

[0069] Further, see Figure 6 and Figure 7 In the third embodiment, the air guide structure 3 includes a heating tube 33. The heating tube 33 is located within the chamber 1 at a position corresponding to the return air port 1a and is arranged side by side with the evaporator 14. In this embodiment, the heating tube 33 creates a Coanda effect, directing the airflow toward the first sidewall 11, thereby achieving uniform airflow. Furthermore, in this embodiment, the heating tube 33 can serve as a defrost heating element, and the provision of the heating tube 33 also provides a defrosting effect.

[0070] It should be noted that the Coanda effect is also known as the wall adhesion effect or the Coanda effect. Fluids, such as water or air, tend to deviate from their original flow direction and flow along the protruding surface of an object. When there is surface friction between the fluid and the surface of the object it flows through (also known as fluid viscosity), as long as the curvature is not large, the fluid will flow along the surface of the object. Therefore, when the airflow flows through the heating tube 33, it will flow along the outer periphery of the heating tube 33, thereby enabling the airflow to move in the direction close to the first side wall 11.

[0071] For further information, see Figure 7 , to ensure that the heating tube 33 can obtain better flow guidance effect and defrosting effect at the same time. In this embodiment. The heating tube 33 is located between the evaporator 14 and the first side wall 11, and is arranged close to the first side wall 11. Specifically, the distance from the evaporator 14 to the first side wall 11 is d, and the distance from the heating tube 33 to the first side wall 11 is f, f / d≤0.5. In this way, the heating tube 33 is arranged relatively close to the return air port 1a, so that the air flow can obtain a larger diffusion space after flowing through the heating tube 33, so as to obtain a better diffusion effect; at the same time, the heating tube 33 is between the return air port 1a and the evaporator 14 to ensure the defrosting ability of the heating tube 33 on the evaporator 14.

[0072] Similarly, in order to further improve the guiding effect of the heating tube 33. In this embodiment, the evaporator 14 and the return air port 1a are spaced apart along the second direction, and the heating tube 33 is provided between the center position of the return air port 1a and the evaporator 14, and is provided close to the center position of the return air port 1a. Specifically, the distance from the heating tube 33 to the center position of the return air port 1a is g, the width of the return air port 1a is h, and 0.25≤g / h≤0.5. That is, in this embodiment, the heating tube 33 is provided close to the center position of the return air port 1a, so that the airflow from the return air port 1a can flow as close to the first side wall 11 as possible under the guiding effect of the heating tube 33, so that the airflow can flow further evenly in the chamber 1.

[0073] It should be noted that in this embodiment, in order to achieve a flow-guiding effect while reducing the volume of chamber 1 and thereby improving the integration of the refrigeration system flow channel structure 100, a single heating tube 33 is provided. In another embodiment, multiple heating tubes 33 may be provided, with the multiple heating tubes 33 arranged at intervals along the second direction. The provision of multiple heating tubes 33 can enhance the flow-guiding and defrosting effects. It is understood that there is no limit to the number of heating tubes 33; two or three heating tubes may be provided, as long as the flow-guiding capacity of the flow-guiding structure 3 is enhanced.

[0074] Specifically, since multiple heating tubes 33 are provided, they are arranged gradually away from the return air port 1a in a direction away from the air outlet 1b, such that the arrangement direction of the multiple heating tubes 33 is inclined with respect to the second direction. This creates a more layered arrangement of the multiple heating tubes 33, allowing the airflow from the return air port 1a to have more room to diffuse as it passes through each of the heating tubes 33, allowing the airflow to further diffuse within the chamber 1 and improving airflow uniformity.

[0075] Also, see Figure 8 The present invention also provides a refrigeration system flow channel structure 100 including a chamber 1 and a return air duct 2. The chamber 1 has a first sidewall 11 and a second sidewall 12 located in a first direction and arranged opposite each other, and two end walls 13 located in a second direction and at both ends of the first sidewall 11 and the second sidewall 12. The wall portion of the chamber 1 is provided with an air outlet 1b and a return air duct 1a spaced apart in the second direction. The chamber 1 is provided with an evaporator 14 located between the air outlet 1b and the return air duct 1a, wherein the return air duct 1a is provided on the first sidewall 11. One end of the return air duct 2 is connected to the compartment 210, and the other end is connected to the return air. The width of the return air duct 1a is h, 20mm≤h≤45mm.

[0076] This solution maintains the width h of the return air port 1a within 20 mm ≤ h ≤ 45 mm, thereby increasing the cross-sectional area of ​​the return air port 1a. This creates sufficient space in front of the evaporator 14 to restore pressure and improve airflow uniformity through pressure compensation. Preferably, to increase the integration of the refrigeration system flow channel structure 100, 20 mm ≤ h ≤ 25 mm is selected.

[0077] It is understood that when the width of the return air port 1a is too small, sufficient space cannot be created in front of the evaporator 14 to restore pressure. When the width of the return air duct is too large, the airflow from the return air port 1a does not match the cooling effect of the evaporator 14, reducing cooling energy efficiency. However, when the width of the return air port 1a is h, 20mm≤h≤25mm, sufficient space can be created in front of the evaporator 14 to restore pressure, and the cooling effect of the evaporator 14 can be matched, thereby improving the cooling energy efficiency of the evaporator 14.

[0078] Also, see Figure 9 and Figure 10 To achieve the above-mentioned purpose, the present invention further proposes a refrigerator 200, which includes the refrigeration system flow channel structure 100 described in the above-mentioned technical solution. The chamber 1 is the evaporation chamber of the refrigerator 200. It should be noted that the detailed structure of the refrigeration system flow channel structure 100 of the refrigerator 200 can be referred to the above-mentioned embodiment of the refrigeration system flow channel structure 100, and will not be repeated here. Since the above-mentioned refrigeration system flow channel structure 100 is used in the refrigerator 200 of the present invention, the embodiment of the refrigerator 200 of the present invention includes all the technical solutions of all the embodiments of the above-mentioned refrigeration system flow channel structure 100, and the technical effects achieved are also exactly the same, and will not be repeated here.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A refrigeration system flow channel structure, characterized in that: include: A chamber, the chamber having a first side wall and a second side wall located in a first direction and arranged opposite to each other, and two end walls located in a second direction and located at both ends of the first side wall and the second side wall, the wall portion of the chamber being provided with an air outlet and an air return outlet spaced apart in the second direction, an evaporator being provided in the chamber between the air outlet and the return outlet, wherein the return outlet is provided on the first side wall; a return air duct, one end of which is connected to the compartment of the refrigeration system and the other end of which is connected to the return air outlet; and a guide structure, provided at the junction of the chamber and the return air channel, for guiding the airflow from the return air port toward the first side wall; The guide structure includes a heating pipe, which is arranged in the chamber at a position corresponding to the return air outlet and arranged side by side with the evaporator; The heating tube is located between the evaporator and the first side wall and is arranged close to the first side wall; The evaporator and the return air port are spaced apart along the second direction, and the heating pipe is arranged between the center position of the return air port and the evaporator, and is arranged close to the center position of the return air port.

2. The refrigeration system flow channel structure according to claim 1, characterized in that: The width of the return air outlet is h, 20mm≤h≤45mm.

3. A refrigerator, characterized in that: The refrigeration system flow channel structure comprises the refrigeration system flow channel structure according to any one of claims 1 to 2.

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