Refrigerator

Abstract

A material injection opening is formed in the bottom of the refrigerator, the refrigerator comprises an outer shell, an inner container and at least one flow guide piece, the outer shell comprises a shell body and a back plate, and the back plate and the shell body jointly define an installation space. The inner container is arranged in the mounting space and provided with a first surface, and the first surface is the side face of the side, facing the back plate, of the inner container; wherein the first surface is provided with a mounting area, and the mounting area is formed by a circular area which takes a point, opposite to the center of the back plate, on the inner container as the circle center and takes R as the radius; one end of the flow guide piece is arranged in the installation area, and the other end of the flow guide piece obliquely extends upwards in the direction away from the center line of the height direction of the refrigerator. According to the refrigerator disclosed by the utility model, the flow guide piece is additionally arranged in the refrigerator, so that the flowing direction of the injected foam material is effectively changed, the filling state of the foam material in the refrigerator is improved, and the quality of the refrigerator is improved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a refrigerator. Background Technology

[0002] A refrigerator is a household appliance used to preserve food. With increasing societal demands, refrigerators are also used to store cosmetics and other daily necessities that require specific storage conditions, thus placing new demands on their functionality and design. To ensure the various design and functionalities of a refrigerator, its internal structure has become quite complex.

[0003] There are various methods for manufacturing refrigerators, the most widely used being a method where rigid polyurethane foam material is injected from near the compressor at the bottom, with the back facing down. One foaming machine can foam multiple molds, resulting in low equipment investment costs. Furthermore, because it can continuously foam and form horizontally arranged molds, it offers advantages such as high efficiency and short demolding time. However, in this method, where rigid polyurethane foam material is injected from near the compressor at the bottom, the complex internal structure of the refrigerator, along with obstacles such as the main control board, wiring, return air pipes, air ducts, and VIPs, can cause uneven flow of the foam material, sometimes resulting in "air pockets" or "trapped air," severely affecting the refrigerator's quality.

[0004] Furthermore, in the production of refrigerators using a single injection molding process, one foaming machine can use multiple molds. Each mold corresponds to refrigerators of various volumes, and the expansion method of rigid polyurethane foam material differs for each model (different volumes), resulting in different optimal foam flow rates. However, changing the foam flow rate on the foaming machine is quite complex; therefore, during continuous production, all molds use the same foam flow rate. Consequently, for some refrigerator models, the inability to select the optimal flow rate can lead to poor filling of the injected foam material. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a refrigerator in which a flow guide is added inside the refrigerator, effectively changing the flow direction of the injected foam material, thereby improving the filling state of the foam material inside the refrigerator and enhancing the quality of the refrigerator.

[0006] According to a first aspect of the present invention, a refrigerator has a filling port formed at its bottom, and the refrigerator includes:

[0007] Housing, the housing comprising:

[0008] Shell body;

[0009] The back plate and the shell body together define the installation space;

[0010] The inner liner is disposed in the installation space and has a first surface, which is a side surface of the inner liner facing the back plate.

[0011] The first surface has an installation area, which is a circular area with a radius R centered on a point on the inner liner opposite to the center of the back panel. The refrigerator also includes:

[0012] At least one flow guide, one end of which is located within the installation area, and the other end of which extends upward at an angle toward the center line of the height direction away from the refrigerator.

[0013] According to the refrigerator of this utility model embodiment, by adding a flow guide, the flow of foam material can be induced, effectively changing the flow direction of the foam material flowing in from the bottom inlet of the refrigerator, and reducing the flow resistance of the foam material. This prevents poor foam filling caused by problems such as refrigerator design structure, production equipment, or production machine type, thus ensuring the production quality of the refrigerator. Furthermore, the installation area of ​​the flow guide is defined. This allows the installation position of the flow guide to be adjusted according to the actual design structure of the refrigerator, maximizing the effect of the flow guide in inducing the flow of the foam material. In other words, by adding flow guides inside the refrigerator and limiting their number and installation area, the flow guides can be applied to refrigerators of different models (different volumes) and design structures, or to meet the flow restriction requirements of foam material filling equipment, effectively improving the filling effect of the foam material and enhancing the production quality of the refrigerator.

[0014] According to some embodiments of the present invention, the tilt angle of the guide is α, wherein α satisfies: 30°≤α≤60°.

[0015] The specific advantages or beneficial effects of the above scheme are as follows: The tilt angle α of the flow guide has a significant impact on the diffusion and flow of rigid polyurethane foam. When the tilt angle of the flow guide is within the above range, the flow guiding effect is optimal, and the flow guide also provides the best resistance to the flow of rigid polyurethane foam, allowing the foam material to be evenly filled in all parts of the refrigerator.

[0016] According to some embodiments of the present invention, α further satisfies: α = 45°.

[0017] The specific advantages or beneficial effects of the above scheme are as follows: According to the calculation results, when α=45°, α is the intersection of the lift and resistance of the flow guide, which is the optimal tilt angle of the flow guide, achieving the best flow guiding effect. Furthermore, the flow guide can also provide some obstruction to the rigid polyurethane foam material, allowing it to be evenly filled in the upper and lower parts of the refrigerator.

[0018] According to some embodiments of this utility model, the height of the back plate is H, the length of the flow guide is L, the width of the flow guide is W, and the thickness of the flow guide is T, wherein H, L, W and T respectively satisfy: 0.1H≤L≤0.25H, 0.1L≤W≤0.25L, 0.1L≤T≤0.25L.

[0019] The specific advantages or beneficial effects of the above solution are as follows: The volume of the back of the refrigerator is roughly proportional to the space filled with foam; therefore, the length, width, and thickness of the flow guide need to be adjusted according to the back of the refrigerator. When the length, width, and thickness of the flow guide are within the above range, the flow guiding effect is best, and the flow resistance of the flow guide for the rigid polyurethane foam material is also most moderate, allowing the filling effect of the rigid polyurethane foam material to reach its optimal state.

[0020] According to some embodiments of this utility model, the height of the back plate is H, wherein R and H satisfy: 0.25H≤R≤0.75H.

[0021] The specific advantages or beneficial effects of the above solution are as follows: Rigid polyurethane foam material is injected from the lower center of the refrigerator back panel. The position of the guide is related to the height of the back panel. When the radius of the installation area is within the above range, the diffusion of rigid polyurethane foam material can be effectively controlled, thereby achieving the best filling effect.

[0022] According to some embodiments of the present invention, the contact surface between the guide member and the first surface is a plane.

[0023] The specific advantages or beneficial effects of the above scheme are as follows: the flow guide installation area is located on the first surface. When the first surface is flat, the installation of the flow guide will be more stable, so that it can achieve the best flow guiding effect.

[0024] According to some embodiments of the present invention, there are multiple flow guides, with one end of the multiple flow guides close to each other, and the other ends of the multiple flow guides extending obliquely away from each other.

[0025] The specific advantages or beneficial effects of the above solution are as follows: Due to the presence of various functional components, the internal structure of the refrigerator is relatively complex. The presence of multiple flow guides can ensure the uniform filling of rigid polyurethane foam material in various areas of the refrigerator, preventing phenomena such as empty material and trapped air.

[0026] According to some embodiments of the present invention, the guide component includes a resin component, a metal component, or a wooden component.

[0027] The specific advantages or beneficial effects of the above scheme are as follows: the materials selected for the guide components are all materials with low raw material prices, easy availability, and low difficulty in production and molding, which can effectively control their production costs.

[0028] According to some embodiments of the present invention, the refrigerator further includes: a first storage compartment disposed within the installation space; a second storage compartment disposed within the installation space, the second storage compartment and the first storage compartment being arranged along the width direction of the refrigerator; a heat-insulating material component disposed between the second storage compartment and the shell body on the side of the second storage compartment away from the first storage compartment; wherein, one end of the flow guide is located between the first storage compartment and the second storage compartment, and the other end of the flow guide extends toward the side where the second storage compartment is located.

[0029] The specific advantages or beneficial effects of the above scheme are as follows: the presence of the insulation material and the installation limitation of the flow guide can ensure the insulation effect of the second storage chamber, and also ensure the uniform filling of rigid polyurethane foam material in each area of ​​the first and second storage chambers.

[0030] According to a second aspect embodiment of the present invention, the refrigerator includes:

[0031] Housing, the housing comprising:

[0032] Shell body;

[0033] The back plate and the shell body together define the installation space;

[0034] Inner liner, wherein the inner liner is disposed in the installation space;

[0035] The inner liner has an installation area on one side facing the back panel and / or on the back panel.

[0036] The mounting area is constructed with a circular region centered at a point on the inner liner opposite the center of the back panel and having a radius of R, and / or,

[0037] The mounting area is constructed with a circular region centered at the center of the back panel and having a radius of R; the refrigerator also includes:

[0038] A flow guiding component is disposed within the installation area and is inclined relative to the centerline of the refrigerator in the height direction.

[0039] The specific advantages or beneficial effects of the above solution are as follows: By adding a flow guiding component inside the refrigerator, the flow of foam material can be induced, effectively changing the flow direction of the foam material flowing in from the bottom inlet of the refrigerator, and reducing the flow resistance of the foam material. This prevents poor foam filling caused by problems such as refrigerator design structure, production equipment, or production machine type, thus ensuring the production quality of the refrigerator. Furthermore, the installation area of ​​the flow guiding component is defined. This allows the installation position of the flow guiding component to be adjusted according to the actual design structure of the refrigerator, maximizing the effect of the flow guiding component in inducing the flow of foam material. In other words, by adding a flow guiding component inside the refrigerator and defining its installation area, the flow guiding component can be applied to refrigerators of various specifications and designs, or to meet the flow restriction requirements of foam material filling equipment, effectively improving the filling effect of the foam material and enhancing the production quality of the refrigerator.

[0040] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0041] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0042] Figure 1 This is a partial schematic diagram of a refrigerator according to an embodiment of the present utility model, wherein the back panel is not shown;

[0043] Figure 2 This is a partial schematic diagram of a refrigerator according to an embodiment of the present utility model, wherein the back panel and mounting area are not shown;

[0044] Figure 3 This is a schematic diagram of a flow guide component of a refrigerator according to an embodiment of the present utility model;

[0045] Figure 4 This is a partial schematic diagram of a refrigerator according to another embodiment of the present invention, wherein there are multiple flow guides;

[0046] Figure 5 This is a schematic diagram of the back panel of a refrigerator according to an embodiment of the present utility model, wherein the inner liner is not shown, and there are multiple guide members;

[0047] Figure 6 This is a schematic diagram illustrating the calculation principle of the tilt angle of the air guide component of the refrigerator according to an embodiment of the present utility model.

[0048] Figure 7 This is a diagram showing the calculated tilt angle of the air guide of the refrigerator according to an embodiment of the present utility model;

[0049] Figure 8This is a schematic diagram of the flow of foam material in a refrigerator according to an embodiment of the present invention;

[0050] Figure 9 This is a simulation diagram of the filling effect of rigid polyurethane foam material in the refrigerator installation guide component according to an embodiment of the present utility model;

[0051] Figure 10 This is a schematic diagram of the density distribution of foam material in a refrigerator according to an embodiment of the present utility model, wherein a is a diagram of the filling area division, b is a schematic diagram of the density distribution of foam material, and c is a schematic diagram of the installation of the flow guide, wherein there are multiple flow guides;

[0052] Figure 11 This is a schematic diagram of the density distribution of foam material in a refrigerator when the foam material injection flow rate is different according to an embodiment of the present invention, wherein a is a foam material injection flow rate of 800 g / s, b is a foam material injection flow rate of 950 g / s, and c is a foam material injection flow rate of 1150 g / s.

[0053] Figure 12 This is a schematic diagram of the density distribution of foam material in refrigerators of different volumes according to an embodiment of the present invention, wherein a is a 190L refrigerator and b is a 350L refrigerator.

[0054] Figure label:

[0055] 100. Refrigerator;

[0056] 1. Outer shell; 11. Shell body; 12. Back panel;

[0057] 2. Inner liner; 21. First surface; 211. Mounting area;

[0058] 3. Flow guiding components; 31. Flow guiding parts. Detailed Implementation

[0059] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-12 A refrigerator 100 according to a first aspect embodiment of the present invention is described.

[0060] like Figure 1 As shown, according to the first aspect of the present invention, a refrigerator 100 has a filling port (not shown) formed at the bottom of the refrigerator 100. The refrigerator 100 includes an outer shell 1, an inner liner 2 and at least one flow guide 31.

[0061] Specifically, the outer shell 1 includes a shell body 11 and a back plate 12, which together define an installation space. The inner liner 2 is disposed within the installation space and has a first surface 21, which is the side of the inner liner 2 facing the back plate 12.

[0062] For example, Figure 1 , Figure 2 and Figure 4 The example shows a rear view of the shell body 11, with the first surface 21 being the rear side surface of the inner liner 2. For example, the outer shell 1 can be configured as a cuboid, with the back panel 12 forming the rear side surface of the refrigerator 100. The back panel 12, connected to the shell body 11, together define an installation space for mounting the internal components of the refrigerator 100. During the manufacturing process of the refrigerator 100, rigid polyurethane foam material is typically injected from near the compressor (not shown) at the bottom of the refrigerator 100 to fill the space between the inner liner 2 and the back panel 12. Furthermore, the outer shell 1 can protect the components within the installation space, extending the service life of the refrigerator 100. Figure 1 The first surface 21 has a mounting area 211, which is a circular area with a radius of R centered on a point on the inner liner 2 opposite to the center of the back panel 12. For example, in Figure 1 In the example, the left-right arrows represent the centerline of the inner liner 2 along its length, and the up-down arrows represent the centerline of the inner liner 2 along its width. The intersection of the lines containing these two arrows is the center of the circle. Figure 1 The circular area shown is the installation area.

[0063] The definition of the installation area 211 needs to be based on the volume of the rear of the refrigerator 100 and the position of each functional component. When the installation area 211 is set in a relatively upper area inside the refrigerator 100, the rigid polyurethane foam material is injected along the compressor section at the bottom of the refrigerator 100. However, the distance between the installation area 211 and the injection port is too far, failing to provide a good guiding effect on the flow of the rigid polyurethane foam material, thus limiting the improvement in filling effect. When the installation area 211 is set in a relatively lower area inside the refrigerator 100, i.e., close to the injection port, the rigid polyurethane foam material can play a guiding role after injection. However, once the rigid polyurethane foam material flows through the installation area 211, it can no longer play a guiding role, and the filling effect of the upper part of the refrigerator 100 cannot be improved, potentially resulting in empty space. Setting the installation area 211 in the area starting from the center of the inner liner 2 is a centered and reasonable setting that can effectively guide the flow of the rigid polyurethane foam material.

[0064] Combination Figure 1 , Figure 2 , Figure 4 and Figure 5 The refrigerator 100 also includes at least one flow guide 31, one end of which is disposed within the mounting area 211, and the other end of which extends upward at an angle toward the center line in the height direction away from the refrigerator 100. For example, in Figure 1In the example, the flow guide 31 is disposed within the aforementioned installation area 211. The extension direction of the flow guide 31 is non-vertical, and there is a certain angle between the extension direction of the flow guide 31 and the center line in the height direction of the refrigerator 100. Specifically, the angle can be adjusted according to the volume of the rear of the refrigerator 100 and the internal structure of the refrigerator 100. With this configuration, when there are obstacles such as wires or return air pipes on the inner liner 2 of the refrigerator 100, the rigid polyurethane foam material can be effectively flowed to and filled in the area affected by the obstacles by adjusting the installation angle of the flow guide 31, preventing empty areas. In addition, by setting the flow guide 31, the rigid polyurethane foam material can change its flow direction after contacting the flow guide 31, so that the rigid polyurethane foam material flows to the corresponding position along the inclined direction of the flow guide 31, thereby improving the uniformity of the rigid polyurethane foam material filling inside the refrigerator 100.

[0065] For example, combining Figure 12 , Figure 12 (a) indicates the diffusion state of the liquid (rigid polyurethane foam material) foamed at 1150 g / s in a 190L refrigerator. Figure 12 (b) shows the diffusion state of the liquid (rigid polyurethane foam material) foamed at 1150 g / s in the 350L refrigerator 100. It can be seen that, at the same flow rate, the rigid polyurethane foam material in the 190L refrigerator 100 did not leak from the injection port, but the liquid was noticeably biased upwards, resulting in poor filling of the lower portion of the rigid polyurethane foam material. By setting the guide component 31, some of the rigid polyurethane foam material can be prevented from flowing to the upper part of the refrigerator 100, thus making the density of the foam material in the upper and lower parts of the refrigerator 100 more uniform, i.e., reducing the density difference between the upper and lower parts of the refrigerator 100. This solves the problem of poor foam material filling in some refrigerator models 100 when all molds use the same foam flow rate.

[0066] According to an embodiment of the present invention, the refrigerator 100, by adding a flow guide 31, can induce the flow of foam material, effectively changing the flow direction of the foam material flowing in from the bottom inlet of the refrigerator 100, and reducing the flow resistance of the foam material. This prevents poor foam filling caused by problems such as the design structure of the refrigerator 100, production equipment, or production model, thus ensuring the production quality of the refrigerator 100. Furthermore, the installation area 211 of the flow guide 31 is defined. This allows the installation position of the flow guide 31 to be adjusted according to the actual design structure of the refrigerator 100, maximizing the effect of the flow guide 31 in inducing the flow of the foam material. In other words, by adding a flow guide 31 inside the refrigerator 100 and defining its quantity and installation area 211, the flow guide 31 can be applied to refrigerators 100 of different models (different volumes) and design structures, or to the flow rate limitations of foam material filling equipment, effectively improving the filling effect of the foam material and enhancing the production quality of the refrigerator 100.

[0067] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The tilt angle of the guide member 31 is α, where α satisfies: 30°≤α≤60°. For example, on a straight line drawn vertically from the bottom to the top of the back plate 12 (e.g. Figure 1 When the direction of the arrow in the vertical direction is set to 0°, the angle between the vertical line and the guide 31 is α.

[0068] After the rigid polyurethane foam material is injected from the bottom of the refrigerator 100, it collides with the guide member 31, thereby inducing the flow of the rigid polyurethane foam material. Therefore, the tilt angle of the guide member 31 is crucial for controlling the diffusion of the rigid polyurethane foam material. For example, when the tilt angle α of the guide member 31 is less than 30 degrees, the contact area between the foam material and the guide member 31 is small after the foam material is injected along the bottom inlet (not shown in the figure), thus the inducing effect of the guide member 31 on the flow of the rigid polyurethane foam material is very limited. However, when the tilt angle α of the guide member 31 is greater than 60 degrees, the tilt angle is too large, and when the foam material collides with the guide member 31 during flow, the resistance of the guide member 31 to the foam material is too great, which will significantly hinder the flow of the foam material and thus affect the filling effect of the foam material in various areas of the refrigerator 100.

[0069] The tilt angle α of the guide vane 31 can be calculated using Newton's square law of sines, that is, based on the lift calculation of air impacting an aircraft wing in aerodynamics. Using this principle, the state of the rigid polyurethane foam material when colliding with the guide vane 31 can be explained.

[0070] Specifically, such as Figure 6As shown in (a), the aircraft wing is considered as a flat plate with area S. A fluid of density ρ (in this case, air) collides with this plate at a velocity U and an angle α. At this time, the force perpendicular to the plate is the lift force F. Here, the flat plate is likened to a guide 31, and the air is likened to rigid polyurethane foam material (the xyz axes differ by 90 degrees when the plate is considered as a blade and when it is considered as a guide 31, but the principle is the same if gravity is ignored). The calculation relationship is shown in the following equation (1):

[0071]

[0072] Equation (1).

[0073] Where F is the "change in momentum per unit time", defined as the product of "change in momentum per unit mass per unit time" and "mass acting on the plate per unit time". The premise for using the above equation (1) is that the fluid particles colliding with the plate are not as... Figure 6 Instead of bouncing back like arrow A shown in (b), it bounces back as... Figure 6 (b) shows that arrow B moves along the plate, and its speed is Ucosα. According to this premise, the vector representing the change in momentum of the fluid particle is perpendicular to the plate, and its magnitude is Usinα. That is to say, Usinα in equation (1) represents "the change in momentum per unit mass per unit time", and ρUSsinα represents "the mass acting on the plate per unit time".

[0074] Furthermore, "resistance is proportional to the density ρ of the fluid, the area S of the plate, and the square of the fluid velocity U," that is, "resistance ∝ αρSU". 2 Based on the above premises, when changing the angle (elevation angle) α of the plate, the lift and resistance are based on the normal force (normal direction force). The relationship is expressed in the following equation (2):

[0075]

[0076] Equation (2).

[0077] The units corresponding to each physical quantity included in the above equations (1) and (2) are shown in Table 1 below.

[0078] Table 1 lists the units corresponding to the physical quantities included in Equation (1).

[0079]

[0080] Specifically, as shown in Table 2 and Figure 7 As shown, based on the above formulas (1) and (2), the relationship between the normal force, resistance and lift and the tilt angle α of the plate when the fluid collides with the plate can be calculated.

[0081] Combination Figure 7 From this, we can draw the following conclusions: If the tilt angle of the plate increases, the resistance force increases in terms of acceleration. Furthermore, if the tilt angle of the plate increases, the lift force increases. The relationship between the tilt angle of the plate and the lift force is parabolic; that is, the lift force reaches its maximum when the tilt angle of the plate is 55 degrees. When the tilt angle of the plate is lower or higher than 55 degrees, the lift force decreases. The resistance force and lift force intersect at 45 degrees. It should be noted that the calculations here are based on a simplified model and differ from actual aircraft lift calculations.

[0082] The aforementioned lift and resistance are analogous to the state when the rigid polyurethane foam material inside the refrigerator 100 impacts the guide member 31. The purpose of the guide member 31 is to change the flow direction of the rigid polyurethane foam material. A large lift means that the guide member 31 exerts a greater promoting force on changing the flow direction of the rigid polyurethane foam material; in other words, a large lift results in a greater degree of change in the flow direction of the rigid polyurethane foam material. A small resistance means that the rigid polyurethane foam material experiences less resistance when impacting the guide member 31; in other words, a small resistance has a better effect on inducing the change in the flow direction of the rigid polyurethane foam material by the guide member 31. Therefore, the preferred setting for the tilt angle of the guide member 31 is one of large lift and small resistance.

[0083] Based on the calculation results in Table 2, when the tilt angle α of the flow guide 31 is within the range of 30 to 60 degrees, the overall lift is less than the resistance, but the values ​​of lift and resistance are relatively close. At this time, the flow guide 31 has a good guiding effect on the flow direction of the rigid polyurethane foam material. In addition, the flow guide 31 can play a certain role in blocking the rigid polyurethane foam material, so that the upper and lower parts of the foam material are evenly distributed, preventing uneven filling of the rigid polyurethane foam material in the upper or lower parts of the refrigerator 100 due to excessively fast or slow injection flow, resulting in excessively large differences in filling density, which in turn affects the heat insulation and heat preservation effect of each area of ​​the refrigerator 100.

[0084] When the tilt angle α of the flow guide 31 is less than 30 degrees, for example, when α = 15 degrees, the calculated values ​​of lift and resistance are both small, and the flow guide 31 has a small induction effect on the flow direction of the rigid polyurethane foam, making it difficult to control the diffusion and flow of the rigid polyurethane foam. When the tilt angle α of the flow guide 31 is greater than 30 degrees, for example, when α = 75 degrees or 90 degrees, the resistance value is too large, the flow guide 31's resistance to the flow of the rigid polyurethane foam is too large, and the flow guide 31's induction effect on the flow direction of the rigid polyurethane foam is poor. In addition, when the tilt angle of the flow guide 31 is too large, the injected rigid polyurethane foam will entrain air when it collides with the flow guide 31, causing bubble problems and thus affecting the filling effect.

[0085] In actual production, the size and design of refrigerators 100 vary, and the internal structure of the area filled with rigid polyurethane foam material also differs from model to model. Therefore, the placement location and angle of each refrigerator 100 are different. For example, in large-sized refrigerators 100, the rigid polyurethane foam material needs to flow a longer distance, requiring reduced resistance. In side-by-side refrigerators 100, where the thickness of the foam filling portion on the back of the left freezer section and the right refrigerator section differs, a significant change in flow direction is required, necessitating an increase in lift. Based on the above, the tilt angle of the guide member 31 in this application is set within the range of 30 to 60 degrees.

[0086] According to some embodiments of this utility model, refer to Figure 4 and Figure 8 Furthermore, α satisfies the following condition: α = 45°.

[0087] Preferably, in conjunction with Table 2 and Figure 7 According to the calculation results, when the tilt angle α of the flow guide 31 is 45 degrees, the resistance and lift intersect at 45 degrees, that is, the resistance equals the lift. At this time, the flow guide 31 has the best guiding effect on the flow direction of the rigid polyurethane foam material, which can make the rigid polyurethane foam material fill more evenly throughout the refrigerator 100.

[0088] Table 2. Relationship between normal force, resistance force, and lift force during fluid-plate collision and the plate tilt angle α.

[0089]

[0090] According to some embodiments of this utility model, refer to Figures 1 to 3 The height of the back plate 12 is H, the length of the guide 31 is L, the width of the guide 31 is W, and the thickness of the guide 31 is T. H, L, W and T satisfy the following conditions: 0.1H≤L≤0.25H, 0.1L≤W≤0.25L, and 0.1L≤T≤0.25L.

[0091] Refrigerator 100 comes in various sizes, ranging from small to large. The installation space volume of refrigerator 100 and the space filled with rigid polyurethane foam are roughly proportional. Typically, refrigerator 100 is rectangular in shape, and its height, width, and depth are proportional to the installation space volume. Therefore, the length and width of the back panel 12 depend on the installation space volume of refrigerator 100.

[0092] The flow rate of the rigid polyurethane foam material needs to be optimized based on the volume of the space to be filled and the area of ​​the back panel 12. Therefore, it is assumed that the rigid polyurethane foam material diffuses in approximately the same manner, regardless of the size of the refrigerator 100. In this case, the length of the guide member 31 needs to be controlled within a certain range in order to change the direction of diffusion of the rigid polyurethane foam material. If the length of the guide member 31 is too short, the guiding effect of the guide member 31 will be small. Moreover, the guide member 31 has a certain blocking effect on the rigid polyurethane foam material, which allows the rigid polyurethane foam material to be evenly filled in the upper and lower areas of the refrigerator 100. If the length of the guide member 31 is too short, its blocking effect on the rigid polyurethane foam material will be very limited. If the length of the guide member 31 is too long, the resistance when the rigid polyurethane foam material hits the guide member 31 will be too large. Therefore, the length of the guide member 31 needs to be determined based on the installation space volume of the refrigerator 100. In addition, the conditions for determining the width and thickness of the guide member 31 are the same as the conditions for determining the length mentioned above.

[0093] If the height of the back panel 12 of the refrigerator 100 is H, the length L of the flow guide 31 needs to be controlled within the range of 0.1H to 0.25H; the width W of the flow guide 31 needs to be controlled within the range of 0.1L to 0.25L; and the thickness T of the flow guide 31 needs to be controlled within the range of 0.1L to 0.25L. When the length, width, and thickness of the flow guide 31 are set within the above-mentioned limits, the dimensions of the flow guide 31 are reasonable, and the flow guide 31 can play a good role in guiding the flow direction of the rigid polyurethane foam material without causing significant resistance to the flow of the rigid polyurethane foam material.

[0094] According to some embodiments of this utility model, refer to Figure 1 The height of the back plate 12 is H, where R and H satisfy: 0.25H≤R≤0.75H.

[0095] Rigid polyurethane foam material is injected into the refrigerator 100 through the injection port at the center of the lower part of the back panel 12. To effectively control the diffusion of the rigid polyurethane foam material, the installation of the guide component 31 requires defining an installation area 211. This installation area 211 is a circular area with a radius of R, starting from the center point of the back panel 12. Furthermore, the radius R of the installation area 211 needs to be set according to the volume of the rear section and the internal design of the refrigerator 100. The radius R of the installation area 211 is related to the height H of the back panel 12, and R needs to be controlled within the range of 0.25H to 0.75H. With this configuration, the guide component 31 can better induce the diffusion of the rigid polyurethane foam material, resulting in more uniform filling of the foam material between the upper and lower parts of the refrigerator 100, further improving the filling effect.

[0096] According to some embodiments of this utility model, refer to Figures 1 to 5 The contact surface between the guide element 31 and the first surface 21 is a plane.

[0097] For example, in Figure 1 In the example, the flow guide 31 is installed on the first surface 21 of the inner liner 2 of the refrigerator 100, with the side of the flow guide 31 facing the first surface 21 in contact with it. If the contact surface between the flow guide 31 and the first surface 21 is non-planar, the contact area between the flow guide 31 and the first surface 21 may be reduced due to the curvature of the contact surface or other non-planar structures, thus affecting the installation difficulty and strength of the flow guide 31, making it easy to fall off and affecting its function. Therefore, by setting the contact surface between the flow guide 31 and the first surface 21 to be planar, the contact area between the flow guide 31 and the first surface 21 is increased, improving the installation stability of the flow guide 31, which is beneficial for its long-term stable use. For example, the shape of the flow guide 31 can be set as a square prism, triangular prism, semi-cylindrical structure, or other planar shapes that are easy to install. However, it is not limited to these.

[0098] According to some embodiments of this utility model, refer to Figure 4 and Figure 5 There are multiple guide elements 31, with one end of each guide element 31 close to each other and the other ends of each guide element 31 extending at an angle away from each other. In the description of this utility model, "multiple" means two or more.

[0099] Due to the diverse functions of the refrigerator 100, its internal structure has become increasingly complex to ensure its operation. For example, the main control board, wiring, return air pipes, air ducts, and other facilities inside the refrigerator 100 are installed in various areas, hindering the filling of rigid polyurethane foam material. Therefore, simply providing a single flow guide 31 may not meet the need to induce multi-directional flow of the rigid polyurethane foam material.

[0100] For example, combining Figure 4 and Figure 5 In the example shown, two flow guides 31 are provided, forming a certain angle between them, and are installed in the installation area 211 on the first surface 21 of the inner liner 2 of the refrigerator 100. Both flow guides 31 form a certain angle with a straight line drawn vertically from the bottom to the top of the back panel 12, and this angle satisfies the aforementioned range of tilt angle α for the flow guides 31. This arrangement, with two or more flow guides 31 working together, allows the rigid polyurethane foam material to be evenly filled throughout the refrigerator 100, avoiding empty space caused by obstructions and ensuring the production quality of the refrigerator 100.

[0101] According to some embodiments of this utility model, refer to Figure 3 The flow guide 31 includes resin parts, metal parts or wooden parts.

[0102] For example, resin is a widely used synthetic material. Its high plasticity allows for the creation of a wide variety of shapes and applications. Resin products have excellent texture and can be designed in different styles, colors, or sizes according to requirements. Resin materials have a high surface finish, resulting in products with good flexibility. They are also corrosion-resistant, resistant to high and low temperatures, and anti-aging, thus having a long service life. Resin materials have excellent insulation properties and are easy to process. They can be processed through injection molding, extrusion, stretching, and other methods, and can be made into complex shapes and thin-walled parts.

[0103] Metal components are widely used in various industries due to their unique physical and chemical properties. Because of their dense molecular structure, metal components possess high strength and hardness, enabling them to withstand significant pressure and weight. Many metals exhibit excellent corrosion resistance, maintaining a long service life even in humid and corrosive environments. Furthermore, metals can be manufactured into products of various shapes and sizes through various processing methods, such as stamping, casting, and welding. This plasticity allows metal components to meet diverse design requirements and facilitates subsequent processing and assembly. Moreover, metal components possess excellent durability, are not prone to aging, and exhibit good dimensional stability, maintaining their shape and performance under different environmental conditions. This allows metal components to retain their function and appearance even after long-term use. In addition, metal materials are reusable and sustainable resources; from selection to manufacturing and disposal, they do not lead to resource waste or adverse impacts on the ecological environment.

[0104] Wooden components, as a traditional building and decorative material, possess many unique advantages. Wood is soft in texture, easy to cut, carve, and process. It can be bent and twisted, and can be processed through gluing, splicing, and other methods to meet the needs of various applications. Simultaneously, wood has poor electrical conductivity, making it a good electrical insulator.

[0105] In addition, the flow guide 31 can also be a rigid polyurethane foam or expanded polystyrene with excellent thermal insulation properties.

[0106] Rigid polyurethane foam (RPC) exhibits excellent thermal insulation properties. Its low thermal conductivity effectively reduces heat transfer, thereby improving energy efficiency. It also possesses good waterproofing, preventing moisture intrusion and thus avoiding material degradation and structural damage caused by dampness. Furthermore, it exhibits some corrosion resistance, offering a degree of protection against chemical attack. Moreover, RPC has a low density but high mechanical strength, allowing it to provide excellent insulation while maintaining structural stability and durability. RPC can be applied through on-site spraying or injection, offering high adaptability to meet the insulation needs of various shapes and complex structures. Due to its high durability and stability, RPC has a long service life under normal operating conditions and requires minimal maintenance, contributing to lower long-term operating costs.

[0107] Expanded polystyrene (EPS) has a low density, making it easy to handle and install. It also has extremely low thermal conductivity, and its internal porous structure filled with air effectively prevents airflow, providing excellent thermal insulation. EPS exhibits good impact resistance. Its independent air-filled structure allows small-area damage to not affect the entire wall surface, and it can cushion external impacts by changing and recovering its shape. EPS is unaffected by temperature. At high temperatures, it will not melt or flow due to excessive heat; at low temperatures, it will not become brittle due to excessive cold.

[0108] According to some embodiments of the present invention, the refrigerator 100 further includes a first storage compartment, a second storage compartment, and a heat-insulating material component. The first storage compartment is disposed within the installation space. The second storage compartment is disposed within the installation space, and the second storage compartment and the first storage compartment are arranged along the width direction of the refrigerator 100. The heat-insulating material component is disposed between the second storage compartment and the shell body 11 on the side of the second storage compartment away from the first storage compartment. One end of the flow guide 31 is located between the first storage compartment and the second storage compartment, and the other end of the flow guide 31 extends toward the side where the second storage compartment is located.

[0109] In other words, a first storage compartment, namely the refrigerator compartment of the refrigerator 100, and a second storage compartment, namely the freezer compartment of the refrigerator 100, are provided within the installation space defined by the back panel 12 and the shell body 11. The refrigerator compartment and the freezer compartment are arranged along the width of the refrigerator 100, which is a common side-by-side refrigerator 100. Additionally, an insulation material is provided on one side of the freezer compartment. For example, it could be a VIP insulation material, a high-efficiency energy-saving material based on the principle of vacuum insulation. The VIP insulation material has excellent insulation performance and is lightweight and high-strength. When installed on the back panel 12 of the freezer compartment of the refrigerator 100, it can improve the insulation and heat preservation performance of the freezer compartment.

[0110] Furthermore, the flow guide 31 is installed between the refrigeration section and the freezing section, facing the freezing section, to induce the filling of rigid polyurethane foam material. This prevents the rigid polyurethane foam material from being poorly filled due to obstacles such as insulation materials on the freezing section side, thus affecting the insulation and heat preservation effect of the freezing section. In addition, besides the VIP insulation material, the back panel 12 of the freezing section of the refrigerator 100 also contains functional components such as air ducts, return air pipes, and electrical wires (not shown in the figure). When the flow guide 31 is installed inside the refrigerator 100 as described above, it can change the diffusion mode of the foam material, making it diffuse evenly. When the foam material flows to the more complex structure, the induced flow by the flow guide 31 can effectively avoid poor foam material filling appearance caused by poor foam material flow. For example, the foam on the side edge of the freezing section is extremely rough, and there are empty areas in some areas. That is, the setting of the flow guide 31 can change the diffusion mode of the liquid foam material, making it flow evenly, thereby improving its filling effect and effectively improving the production quality and appearance of the refrigerator 100.

[0111] According to a second aspect embodiment of the refrigerator 100 of the present utility model, referring to... Figure 1 , Figure 3 and Figure 4 The refrigerator 100 includes an outer shell 1, which includes a shell body 11; a back panel 12, which together with the shell body 11 defines an installation space; an inner liner 2, which is disposed in the installation space; the inner liner 2 has an installation area 211 on one side facing the back panel 12 and / or on the back panel 12, wherein the installation area 211 is a circular area with a radius of R centered on a point on the inner liner 2 opposite to the center of the back panel 12, and / or the installation area 211 is a circular area with a radius of R centered on the center of the back panel 12; the refrigerator 100 also includes a flow guide assembly 3, which is disposed in the installation area 211 and is inclined relative to the centerline of the height direction of the refrigerator 100.

[0112] For example, Figure 1 , Figure 2 and Figure 4 The example shows a rear view of the shell body 11. For example, the shell 1 can be configured as a cuboid, and the back panel 12 forms the rear side of the refrigerator 100. The back panel 12, connected to the shell body 11, together define an installation space for mounting the internal components of the refrigerator 100. During the manufacturing process of the refrigerator 100, rigid polyurethane foam material is typically injected from near the compressor (not shown) at the bottom of the refrigerator 100 to fill the space between the inner liner 2 and the back panel 12. Furthermore, the shell 1 can protect the components within the installation space, extending the service life of the refrigerator 100. Additionally, the shell 1 can also define the installation position of the inner liner 2, preventing displacement of the inner liner 2 due to external forces during transfer or transportation. Figure 1The inner liner 2 has a mounting area 211 on one side facing the back panel 12 and / or on the back panel 12. The mounting area 211 is a circular area with a radius R centered at a point on the inner liner 2 opposite to the center of the back panel 12. For example, in Figure 1 In the example, the left-right arrows represent the centerline of the inner liner 2 along its length, and the up-down arrows represent the centerline of the inner liner 2 along its width. The intersection of the lines containing these two arrows is the center of the circle. Figure 1 The circular area shown is the installation area 211.

[0113] The definition of the installation area 211 needs to be based on the volume of the rear of the refrigerator 100 and the position of each functional component. When the installation area 211 is set in a relatively upper area inside the refrigerator 100, the rigid polyurethane foam material is injected along the compressor section at the bottom of the refrigerator 100. However, the distance between the installation area 211 and the injection port is too far, failing to provide a good guiding effect on the flow of the rigid polyurethane foam material, thus limiting the improvement in filling effect. When the installation area 211 is set in a relatively lower area inside the refrigerator 100, i.e., close to the injection port, the rigid polyurethane foam material can play a guiding role after injection. However, once the rigid polyurethane foam material flows through the installation area 211, it can no longer play a guiding role, and the filling effect of the upper part of the refrigerator 100 cannot be improved, potentially resulting in empty space. Setting the installation area 211 in the area starting from the center of the inner liner 2 is a centered and reasonable setting that can effectively guide the flow of the rigid polyurethane foam material.

[0114] Combination Figure 1 , Figure 2 , Figure 4 and Figure 5 The refrigerator 100 also includes a flow guiding component 3, which is disposed within the installation area 211 and is inclined relative to the centerline of the refrigerator 100 in the height direction. For example, in Figure 1In the example, the flow guide component 3 is disposed within the aforementioned installation area 211. The extension direction of the flow guide component 3 is non-vertical, and there is a certain angle between the extension direction of the flow guide component 3 and the center line in the height direction of the refrigerator 100. Specifically, the angle can be adjusted according to the volume of the rear of the refrigerator 100 and the internal structure of the refrigerator 100. With this configuration, when there are obstacles such as wires or return pipes on the inner liner 2 of the refrigerator 100, the rigid polyurethane foam material can be effectively flowed to and filled in the area affected by the obstacles by adjusting the installation angle of the flow guide component 3, preventing empty areas. In addition, by setting the flow guide component 3, the rigid polyurethane foam material can change its flow direction after contacting the flow guide component 3, so that the rigid polyurethane foam material flows to the corresponding position along the inclined direction of the flow guide component 31, thereby improving the uniformity of the rigid polyurethane foam material filling inside the refrigerator 100.

[0115] According to an embodiment of the present invention, the refrigerator 100, by adding a flow guiding component 3 inside the refrigerator 100, can induce the flow of foam material, effectively changing the flow direction of the foam material flowing in from the bottom inlet of the refrigerator 100, and reducing the flow resistance of the foam material. This prevents poor foam filling caused by problems such as the design structure of the refrigerator 100, production equipment, or production machine type, thus ensuring the production quality of the refrigerator 100. Furthermore, the installation area 211 of the flow guiding component 3 is defined. This allows the installation position of the flow guiding component 3 to be adjusted according to the actual design structure of the refrigerator 100, maximizing the effect of the flow guiding component 3 in inducing the flow of the foam material. In other words, by adding the flow guiding component 3 inside the refrigerator 100 and defining its installation area 211, the flow guiding component 3 can be applied to refrigerators 100 of various specifications and designs, or to the flow rate limitations of foam material filling equipment, effectively improving the filling effect of the foam material and enhancing the production quality of the refrigerator 100.

[0116] Other configurations and operations of the refrigerator 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0117] The embodiments of this utility model are described in detail below. It should be noted that the embodiments described below are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0118] Example 1

[0119] The simulation analysis method for the filling effect of rigid polyurethane foam material according to a specific embodiment of this utility model is as follows:

[0120] S1: Test refrigerator model 100: Side-by-side model. The freezer compartment has a 15mm thick VIP insulation material attached to its rear back. Refrigerator 100 installation space volume: 600L; back panel 12 height H=1678mm, width W=908mm;

[0121] S2: Shape and size of guide element 31: The shape of guide element 31 is as follows... Figure 3 The rectangular structure shown; the guide element 31 has a length L=200mm, width W=30mm, and thickness T=30mm. The installation position and angle of the guide element 31: the central part of the back plate 12 is the vertex for one end of the guide element 31, as shown... Figure 8 The guide vane 31 is positioned with its other end facing the freezing side, as indicated by the middle arrow. With the vertical line drawn from the bottom to the top of the backplate 12 set at 0 degrees, the angle between the vertical line and the guide vane 31 is 45 degrees, i.e. Figure 8 The angle at which the central guide component 31 tilts to the right;

[0122] S3: The filling port is located in the center of the lower part of the back panel 12 of the refrigerator 100. Filling is done from this point upwards.

[0123] The density testing method for rigid polyurethane foam after filling according to a specific embodiment of this utility model is as follows:

[0124] Two refrigerators 100, which were foamed using the above filling method under conditions with and without the flow guide 31, were disassembled, and their filling density was measured.

[0125] Example 2

[0126] The method for simulating and analyzing the filling effect of rigid polyurethane foam material in a mold according to a specific embodiment of this utility model is as follows:

[0127] S1: Test mold dimensions: length L=700mm, width W=400mm, height H=100mm; Divide the mold into 4 parts, as follows: Figure 10 As shown in the diagram, they are named A-back left, B-back right, C-front left, and D-front right, respectively.

[0128] S2: Install the two flow guides 31 inside the refrigerator 100 in a V-shaped connection and then perform foaming. The shape and size of the flow guides 31 are as follows: The shape of the flow guide 31 is as follows... Figure 3 The rectangular structure shown; the guide element 31 has a length L=175mm, a width W=30mm, and a thickness T=30mm; in addition, the V-shaped angles are 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, and 90 degrees;

[0129] S3: Horizontally inject rigid polyurethane foam material into the mold from the center of its width using a high-pressure foaming machine. Mold temperature: 40℃; foam material flow rate: 500g / s; foaming pressure: 140bar; foam material weight: 470g.

[0130] The method for testing the weight of each part after rigid polyurethane foam filling according to a specific embodiment of this utility model is as follows:

[0131] After foaming, cut the formed foam and measure the weight of four parts, expressing it as a percentage.

[0132] Example 3

[0133] The simulation analysis method for the filling effect of rigid polyurethane foam material according to a specific embodiment of this utility model is as follows:

[0134] S1: Test refrigerator model 100, a two-door unit. Refrigerator 100 installation space volume: 190L; back panel height H=1318mm, width W=454mm;

[0135] S2: Shape and size of guide element 31: The shape of guide element 31 is as follows... Figure 3 The rectangular structure shown has a length L=200mm, width W=30mm, and thickness T=30mm for the flow guide 31. The material of the flow guide 31 is expanded polystyrene (EPS). The installation position and angle of the flow guide 31 are as follows: the central part of the back plate 12 is the installation vertex of the flow guide 31. Figure 5 The installation effect of the guide element 31 is shown, and the included angle between the two guide elements 31 is 45 degrees.

[0136] S3: The filling port is located in the center of the lower part of the back panel 12 of the refrigerator 100. Filling is done from this point upwards.

[0137] The density testing method for rigid polyurethane foam after filling according to a specific embodiment of this utility model is as follows:

[0138] The refrigerator 100, which was foamed using the above filling method under conditions with and without the flow guide 31, was disassembled, and its filling density was measured.

[0139] Comparative Example 1

[0140] The simulation analysis method for the filling effect of rigid polyurethane foam material according to a specific embodiment of this utility model is as follows:

[0141] S1: Test refrigerator model 100: a two-door model. Refrigerator 100 installation space volume: 190L; back panel height H=1318mm, width W=454mm;

[0142] S2: Without the flow guide 31 installed in the refrigerator 100, rigid polyurethane foam material is injected upwards from the filling port at the lower center of the back panel 12 of the refrigerator 100 at flow rates of 800 g / s, 950 g / s, and 1150 g / s respectively.

[0143] The density testing method for rigid polyurethane foam after filling according to a specific embodiment of this utility model is as follows:

[0144] The refrigerator 100, which was foamed using the above filling method without the flow guide 31 installed, was disassembled and its filling density was measured.

[0145] Table 3. Test results of filling density in different areas of the refrigerator

[0146]

[0147] Table 4. Average density of the freezer and refrigerator compartments of the refrigerator, and their respective upper and lower sections.

[0148]

[0149] Based on the results in Tables 3 and 4 above, it can be seen that by adopting the installation method of the guide component 31 in Comparative Example 1, the density of the freezing section is reduced from 29.75 kg / m³. 3 Increased to 30.21 kg / m 3 This means that the flow of rigid polyurethane foam has changed, with more rigid polyurethane foam flowing towards the upper part of the freezer compartment, and the density of the rigid polyurethane foam has increased significantly, indicating that more rigid polyurethane foam is flowing towards the upper part of the freezer compartment. Conversely, in the upper part of the refrigerated compartment, the density increases from 30.5 kg / m³. 3 Reduced to 29.9 kg / m 3 In other words, the installation of the flow guide 31 significantly improved the filling effect of the rigid polyurethane foam material. It effectively solved the problem of extremely rough foam filling at the side edge of the frozen section and voids in some areas caused by the poor flow performance of the rigid polyurethane foam material. Specifically, the density test areas in Table 4 correspond to... Figure 10 The area division in (a) is as follows: A - upper refrigerated section, B - upper frozen section, C - lower refrigerated section, and D - lower frozen section.

[0150] Specifically, such as Figure 9 As shown in the image, viewed from the center, the diffusion of rigid polyurethane foam material towards the refrigerated section on the right is controlled, while the diffusion towards the frozen section on the left is improved. In other words, the placement of the flow guide 31 significantly improves the flow of rigid polyurethane foam material towards the frozen section on the left.

[0151] Table 5. Weight percentage of rigid polyurethane foam material in each area of ​​the refrigerator after filling.

[0152]

[0153] Based on the results in Table 5 above, it can be seen that, according to... Figure 10 In the zoning method, when the foam weight percentages of the four zones are approximately equal, the two guide elements 31 are arranged in a V-shape with an included angle of 45 degrees. Furthermore, when the included angle of the two guide elements 31 in a V-shape is within the range of 30 to 60 degrees, the difference in foam weight percentages among the four zones is small. However, when the included angle of the two guide elements 31 in a V-shape exceeds the above range, i.e., less than or equal to 15 degrees and greater than or equal to 75 degrees, the difference in foam weight percentages among the four zones is significant, resulting in poor filling effect of the rigid polyurethane foam material. Therefore, an included angle of the two guide elements 31 in a V-shape within the range of 30 to 60 degrees is more suitable, with an optimal angle of 45 degrees.

[0154] Table 6. Test results of rigid polyurethane foam filling density in different areas of the refrigerator.

[0155]

[0156] Table 7. Density test results of different zones of the refrigerator when the infusion flow rate of rigid polyurethane foam is 1150 g / s.

[0157]

[0158] Based on the results in Table 6 above, it can be seen that when the refrigerator 100 is not equipped with the flow guide 31, and the rigid polyurethane foam injection flow rate is 800 g / s, the liquid tends to flow towards the lower side of the refrigerator 100 (the injection port side), resulting in poor foam filling on the upper side of the refrigerator 100. Furthermore, because the foam tends to flow closer to the injection port, its density increases, and the foaming pressure also increases, leading to leakage. When the rigid polyurethane foam injection flow rate is 950 g / s, the liquid flows slightly upwards, with no leakage from the injection port, and the filling condition after injection is good. When the rigid polyurethane foam injection flow rate is 1150 g / s, there is no leakage from the injection port, but the liquid is significantly biased upwards, resulting in poor filling on the lower part of the refrigerator 100.

[0159] Under actual production conditions, the same production line needs to produce refrigerators 100 with capacities of 190L and 350L. If foaming is carried out at a flow rate of 950g / s, which is most suitable for the 190L refrigerator 100, the 350L refrigerator 100 is relatively large, causing the foam material to be biased towards the lower side, resulting in leakage and filling problems from the injection port. Therefore, both the 350L and 190L refrigerators 100 need to be produced with an injection flow rate of 1150g / s, which will result in insufficient filling effect of the rigid polyurethane foam material in both volumes of refrigerators 100. At a flow rate of 1150g / s, the density of the upper part of the refrigerator 100 is higher than that of the lower part, the injected foam liquid is biased towards the upper side, and the lower part of the refrigerator 100 has poor filling. However, if a flow guide 31 is added inside the refrigerator 100, as shown in the data in Table 7, the density difference between the upper and lower parts of the refrigerator 100 is significantly reduced, indicating that the filling state is significantly improved. Compared with the best filling state flow rate of 950g / s when no flow guide 31 is set, the filling effect is also better.

[0160] In summary, the design of the flow guide 31 and the limitation of the installation area 211 of the flow guide 31 enable refrigerators 100 with different rear volumes to maintain a good filling state in each area of ​​the refrigerator 100 even when the flow rate of rigid polyurethane foam material is large, effectively improving the filling effect of rigid polyurethane foam material in the refrigerator 100.

[0161] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0162] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0163] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A refrigerator, wherein a filling port is formed at the bottom of the refrigerator, the refrigerator comprising: Housing, the housing comprising: Shell body; The back plate and the shell body together define the installation space; The inner liner is disposed in the installation space and has a first surface, which is a side surface of the inner liner facing the back plate. Its features are, The first surface has an installation area, which is a circular area with a radius R centered on a point on the inner liner opposite to the center of the back panel. The refrigerator also includes: At least one flow guide, one end of which is located within the installation area, and the other end of which extends upward at an angle toward the center line of the height direction away from the refrigerator.

2. The refrigerator according to claim 1, characterized in that, The tilt angle of the guide is α, wherein α satisfies: 30°≤α≤60°.

3. The refrigerator according to claim 2, characterized in that, The α further satisfies: α = 45°.

4. The refrigerator according to claim 1, characterized in that, The height of the back plate is H, the length of the flow guide is L, the width of the flow guide is W, and the thickness of the flow guide is T. H, L, W and T satisfy the following conditions: 0.1H≤L≤0.25H, 0.1L≤W≤0.25L, and 0.1L≤T≤0.25L.

5. The refrigerator according to claim 1, characterized in that, The height of the back plate is H, wherein R and H satisfy: 0.25H≤R≤0.75H.

6. The refrigerator according to claim 1, characterized in that, The contact surface between the flow guide and the first surface is a plane.

7. The refrigerator according to claim 1, characterized in that, There are multiple flow guides, with one end of each flow guide close to the other, and the other ends of each flow guide extending at an angle away from each other.

8. The refrigerator according to claim 1, characterized in that, The flow guide may be made of resin, metal or wood.

9. The refrigerator according to any one of claims 1-8, characterized in that, Also includes: A first storage room is located within the installation space; The second storage compartment is located within the installation space, and the second storage compartment and the first storage compartment are arranged along the width direction of the refrigerator; A thermal insulation material component is disposed between the second storage chamber on the side of the second storage chamber away from the first storage chamber and the shell body; Wherein, one end of the flow guide is located between the first storage chamber and the second storage chamber, and the other end of the flow guide extends toward the side where the second storage chamber is located.

10. A refrigerator, the refrigerator comprising: Housing, the housing comprising: Shell body; The back plate and the shell body together define the installation space; Inner liner, wherein the inner liner is disposed in the installation space; The characteristic feature is that the inner liner has an installation area on one side facing the back panel and / or on the back panel. The mounting area is constructed with a circular region centered at a point on the inner liner opposite the center of the back panel and having a radius of R, and / or, The mounting area is constructed with a circular region centered at the center of the back panel and having a radius of R; the refrigerator also includes: A flow guiding component is disposed within the installation area and is inclined relative to the centerline of the refrigerator in the height direction.

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