CN215063162U - Heat preservation assembly of refrigerator - Google Patents

Abstract

The application discloses a heat insulation assembly of a refrigerator, which comprises a cover plate, a heat insulation plate and a cooling plate, wherein the cover plate is provided with a mounting groove; the heat insulation plate is arranged in the mounting groove, and a wind channel groove is formed on the surface of the heat insulation plate, which is far away from the cover plate; the cooling plate cover is arranged on the air duct groove, and a microporous structure is arranged on the cooling plate. The heat preservation subassembly of this application refrigerator can reduce the condensation phenomenon and take place.

Description

Heat preservation assembly of refrigerator

Technical Field

The application relates to the field of household appliances, in particular to a heat preservation assembly of a refrigerator.

Background

The existing air-cooled refrigerator provides refrigeration for the drawer through the cold accumulation and preservation assembly so as to reduce the fluctuation of the temperature in the drawer and improve the food preservation effect in the drawer. However, the current cold-storage fresh-keeping subassembly produces the condensation phenomenon towards a side of drawer easily, and the condensation phenomenon can form condensation water, and the condensation water falls into in the drawer, can influence the user and use.

SUMMERY OF THE UTILITY MODEL

The application provides a cooking utensil to solve the fresh-keeping subassembly of current cold-storage and form the condensation phenomenon towards a side of drawer easily, and influence the problem that the user used.

In order to solve the technical problem, the application provides a heat preservation subassembly of refrigerator, and the heat preservation subassembly includes: a cover plate formed with an installation groove; the heat insulation plate is arranged in the mounting groove, and an air duct groove is formed on the surface of the heat insulation plate, which is far away from the cover plate; the cooling plate is covered on the air duct groove, and a microporous structure is arranged on the cooling plate.

Wherein, the microporous structure includes a plurality of trompils, and the aperture value of trompil is more than or equal to 1.5mm, and is less than or equal to 2 mm.

The heat insulation plate comprises a first side surface and a second side surface which are oppositely arranged, the air duct groove is provided with an air inlet and an air return inlet, and the air inlet and the air return inlet are formed in the first side surface; an isolation platform for isolating the air inlet and the air return inlet is arranged in the air duct groove.

The isolation platform divides the air duct groove into an air inlet area corresponding to the air inlet and an air return area corresponding to the air return inlet, and the air inlet area is communicated with the air return area; the area of at least part of the openings in the air return area is larger than that of the openings in the air inlet area.

Wherein, the size of at least part of the openings in the air return area is larger than that of the openings in the air inlet area; and/or the density of the openings in at least part of the unit area of the return air area is greater than that of the openings in the unit area of the air inlet area.

The cooling plate comprises a first cooling part and a second cooling part, the cold conducting capacity of the first cooling part is smaller than that of the second cooling part, and the first cooling part is covered on the air inlet.

The cooling plate comprises an aluminum plate and a heat preservation paste arranged on the aluminum plate, wherein the part with the heat preservation paste in the cooling plate forms a first cooling part, and the part without the heat preservation paste forms a second cooling part.

Wherein the cooling plate comprises an aluminum plate, a portion of the cooling plate not having the aluminum plate constitutes a first cooling portion, and a portion of the cooling plate having the aluminum plate constitutes a second cooling portion.

Wherein, the wind channel inslot is provided with the vortex structure, and the vortex structure is close to the second side setting than first side.

Wherein, the vortex structure includes a plurality of vortex muscle, and a plurality of vortex muscle sets up towards the isolation platform slope.

The isolation platform divides the air duct groove into an air inlet area corresponding to the air inlet and an air return area corresponding to the air return inlet, and the air inlet area is communicated with the air return area; a flow guide structure is arranged in the air inlet area and used for guiding and dispersing air flow entering from the air inlet.

The flow guide structure comprises a plurality of flow guide ribs, and the flow guide ribs extend from the air inlet to the air inlet area in different directions.

Wherein, the distance between the isolation platform and the diversion rib close to the isolation platform is less than the distance between the adjacent diversion ribs.

Wherein, the distance between one end of the isolation platform far away from the air inlet and one side close to the heat insulation plate is equal to the width of the air return inlet.

Wherein, the ratio of the size of the air inlet to the size of the air return inlet is more than or equal to 1.5.

The beneficial effect of this application is: the refrigerator heat-insulation assembly comprises a cover plate, a heat-insulation plate and a cooling plate, wherein the cover plate is provided with a mounting groove; the heat insulation plate is arranged in the mounting groove, and a wind channel groove is formed on the surface of the heat insulation plate, which is far away from the cover plate; the air duct groove is located to the cooling plate lid, is provided with the cellular structure on the cooling plate to reduce the condensation phenomenon through the cellular structure and take place, convenient to use person uses.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is an exploded schematic view of the insulation assembly of the present application;

FIG. 2 is a schematic view of a first configuration of the cooling plate of the present application;

FIG. 3 is a second structural schematic of the cooling plate of the present application;

FIG. 4 is a schematic view of a first backside construction of the heat shield of the present application;

FIG. 5 is a schematic view of the cover plate of FIG. 1;

FIG. 6 is a schematic view of the front side construction of the insulation panel of FIG. 1;

FIG. 7 is a second back side view of the thermal shield of FIG. 1;

FIG. 8 is a schematic view of the structure of B shown in FIG. 1;

FIG. 9 is a side schematic view of the cover plate shown in FIG. 1;

FIG. 10 is a schematic view of the structure of C shown in FIG. 9;

FIG. 11 is a schematic cross-sectional view of the insulating assembly of FIG. 1;

FIG. 12 is a schematic view of the structure of the cooling plate and the temperature barrier shown in FIG. 1;

FIG. 13 is a schematic view of the structure of E shown in FIG. 12;

FIG. 14 is a schematic view of the construction of the insulating panel and temperature shield shown in FIG. 1;

FIG. 15 is a schematic view of F shown in FIG. 14;

fig. 16 is a schematic view of the structure of G shown in fig. 5.

Reference numerals: 1. a cover plate; 11. a base plate; 12. a side plate; 13. mounting grooves; 131. connecting columns; 132. a fixing buckle; 133. fixing the ribs; 134. a serpentine web; 1341. a buckling part; 135. Avoiding the buckling groove; 136. grooving; 14. an installation part; 141. a sensor recess; 2. a heat insulation plate; 21. an air duct groove; 211. an air inlet; 212. an air return opening; 213. an isolation stage; 214. an air inlet area; 215. a return air zone; 22. inserting the column; 221. a chute surface; 222. a lapping table; 223. presetting a groove; 231. fixing grooves; 232. a wire slot; 234. a guide hole; 235. avoiding a catching groove; 236. an avoidance groove; 237. mounting holes; 3. a cooling plate; 31. connecting holes; 32. a first cooling section; 33. a second cooling section; 34. opening a hole; 4. a temperature baffle plate; 41. an inclined wedge surface; 5. a flow guide structure; 51. a flow guiding rib; 6. a turbulent flow structure; 61. a turbulence rib; 10. a heat preservation component.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The following describes the heat preservation assembly of the refrigerator in detail with reference to the embodiments.

The heat preservation assembly serving as an independent refrigeration module can be applied to the ice temperature drawer and used for refrigerating the ice temperature drawer, so that the temperature in the ice temperature drawer is controlled within an ice temperature range, wherein the ice temperature is a temperature range from 0 ℃ to a food freezing temperature position, the temperature of food in the ice temperature drawer is close to the ice temperature, the loss of water and nutritional ingredients such as food is delayed, and the food preservation time is prolonged.

Referring to fig. 1 and 2, fig. 1 is an exploded view of a thermal insulation assembly of the present application; fig. 2 is a schematic view of a first structure of the cooling plate of the present application.

In one embodiment, the insulation assembly 10 includes a cover plate 1, an insulation plate 2, and a cooling plate 3, the cover plate 1 is formed with a mounting groove 13, and the mounting groove 13 is used for mounting the insulation plate 2. The heat insulation plate 2 plays a role in heat insulation, the heat insulation plate 2 is arranged in the installation groove 13, an air duct groove 21 is formed in the surface, deviating from the cover plate 1, of the heat insulation plate 2, and the air duct groove 21 is used for guiding cold air to flow.

The cooling plate 3 performs a cooling function, and the cooling plate 3 is covered on the air duct groove 21, wherein the cooling plate 3 is connected to the cover plate 1 so that the heat insulation plate 2 is located between the cooling plate 3 and the cover plate. That is, cold air is blown into the air duct groove 21 between the heat insulation board 2 and the cooling board 3 to cool the cooling board 3 through the cold air, so that the cooling board 3 supplies cold for the ice temperature drawer, so that the temperature of food in the ice temperature drawer is close to the freezing point temperature, the loss of water and nutrient contents such as the food is delayed, and the food preservation time is prolonged.

Further, because the heat insulation assembly 10 is applied to the ice temperature drawer, the cooling plate 3 in the heat insulation assembly 10 serves as an interface between the ice temperature drawer and the heat insulation assembly 10, and the cooling plate 3 is prone to generate condensation on the surface, and the condensation water falls into the ice temperature drawer and affects the use of a user. Therefore, in order to avoid the above problem, in the present embodiment, the cooling plate 3 is provided with a micro-porous structure (not shown), and the cold air in the air duct groove 21 above the cooling plate 3 sinks through the micro-porous structure, so that the cold-hot interface moves towards the lower side of the cooling plate 3, thereby avoiding the surface of the cooling plate 3 from being condensed. Namely, the above-mentioned microporous structure can prevent the occurrence of the surface condensation phenomenon of the cooling plate 3.

In particular, the microporous structure includes a number of openings 34. In order to avoid the problem that the size of the opening 34 is too large, so that the cold air directly blows to the food in the ice-temperature drawer to dry the food, and the like, the aperture value of the opening 34 in the embodiment is greater than or equal to 1.5mm and less than or equal to 2mm, so as to control the cold air not to directly blow to the food in the ice-temperature drawer through the opening 34, and the opening 34 can ensure that the cold feeling and no wind feeling exist below the cooling plate 3.

Besides, above-mentioned trompil 34 can also promote cooling rate to through trompil 34 to the cold volume of ice temperature drawer conduction downwards, compare and only rely on cooling plate 3 to the cold volume of ice temperature drawer conduction, the cold volume rate of conduction promotes obviously. The aperture of the opening 34 may be 1.5mm, 1.7mm, 2mm, or the like.

The existing cold accumulation and fresh-keeping assembly can refrigerate the drawer, but only can refrigerate locally, and can not realize the uniformity of refrigeration. To achieve uniformity in cooling of the insulation assembly, in one embodiment, the insulation panel 2 includes a first side and a second side, the first side and the second side being oppositely disposed. The duct groove 21 has an air inlet 211 and an air return 212, and an isolation stage 213, the air inlet 211 and the air return 212 are formed on the first side of the heat insulation plate 2, the air inlet 211 is used for the entry of cold air, and the air return 212 is used for the return of cold air. The isolation table 213 isolates the air inlet 211 and the air return 212, can prolong the flow path of cold air, increases the flow area of the cold air, and further increases the cooling area of the whole cooling plate 3, thereby uniformly cooling the temperature in the ice temperature drawer.

That is, cold air is blown into the air duct groove 21 between the insulation board 2 and the cooling board 3 from the air inlet 211, moves along the extended path of the insulation table 213, and returns air from the air return opening 212 to uniformly cool the cooling board 3, so that the cooling board 3 uniformly supplies cold to the ice temperature drawer.

Because cold air in the heat preservation assembly 10 does not directly enter the ice temperature drawer, the cold air directly returns to an evaporator (not shown in the figure) in the refrigerator after circulating in the air duct groove 21 for one circle (the direction is shown by an arrow), wherein the process of circulating the cold air in the air duct groove 21 is also the process of refrigerating the cooling plate 3. However, since the air inlet 211 in the thermal insulation assembly 10 is located at the rear end of the refrigerator, the temperature of the rear end of the cooling plate 3 in the thermal insulation assembly 10 is low, and the temperature of the front end of the cooling plate 3 is low, so that the temperature of the rear end of the ice temperature drawer is low, and the temperature of the front end of the ice temperature drawer is high due to the fact that the cooling plate 3 refrigerates the ice temperature drawer, so that the temperatures of the front end and the rear end in the ice temperature drawer are not uniform. In order to solve the above technical problem, there are various ways, the first is to change the structure of the cooling plate 3 itself; secondly, the heat exchange of the front end of the cooling plate 3 is enhanced; the third is to improve the uniformity of cold air delivery.

The first is to change the structure of the cooling plate 3 itself, and to increase the temperature of the rear end of the thermal insulation component 10 or to reduce the temperature of the front end of the thermal insulation component 10, so as to realize the integral temperature uniformity of the ice temperature drawer.

In some embodiments, such as by reducing the temperature of the front end of the insulating assembly 10, the following is done: the cooling plate 3 is provided with a microporous structure comprising a number of openings 34. In combination with the openings 34 on the cooling plate 3, the opening area of at least a part of the openings 34 in the air return area 215 is larger than the opening area of the openings 34 in the air inlet area 214, so that a small amount of air can be supplied to at least a part of the area in the air return area 215, and a small amount of cool air can directly enter the ice temperature drawer, thereby reducing the temperature of the area.

Further, the opening area of the front end of the air return area 215 corresponding to the cooling plate 3 can be set to be larger than the opening area of the opening 34 in the air inlet area 214, so that a small amount of cold air directly enters the front end position of the air return area 215 corresponding to the cooling plate 3, the temperature of the front end area of the air return area 215 corresponding to the cooling plate 3 is reduced, and the integral temperature uniformity of the ice temperature drawer is realized.

Furthermore, the area of the rear end opening of the air return area 215 corresponding to the cooling plate 3 is larger than the area of the opening of the air inlet area 214, so that cold air entering the ice temperature drawer from the front end of the air return area 215 corresponding to the cooling plate 3 can flow back from the opening 34 at the rear end of the air return area 215 corresponding to the cooling plate 3, and then is discharged through the air return opening 212, thereby realizing the overall temperature uniformity of the heat preservation assembly 10 and the ice temperature drawer.

Since open area is related to the size of apertures 34 and the density of apertures 34, the open area may be defined from the size of apertures 34 and the density of apertures 34. For example, the size of at least some of the openings 34 in the return air region 215 is larger than the size of the openings 34 in the intake air region 214 to increase the open area. Or the density of the openings 34 per unit area in the return air region 215 is at least partially greater than the density of the openings 34 per unit area in the intake air region 214 to increase the open area. Or both the size of the enlarged openings 34 and the density of the openings 34 are varied to increase the open area of at least some of the openings 34 in the return air region 215 relative to the open area of the openings 34 in the intake air region 214. The size of the opening 34 is the hole size of the opening 34. Wherein the density of the apertures 34 is the number of apertures 34 per unit area, the greater the number of apertures 34, the greater the density of the apertures 34; the fewer the number of apertures 34, the less dense the apertures 34.

Referring to fig. 3, fig. 3 is a second structural schematic diagram of the cooling plate of the present application. In conjunction with fig. 1, such as in some embodiments, such as by increasing the temperature of the rear end of the insulating assembly 10. Specifically, the cooling plate 3 includes a first cooling portion 32 and a second cooling portion 33, the first cooling portion 32 is covered on the air inlet 211, and the cooling capacity of the first cooling portion 32 is smaller than that of the second cooling portion 33. Namely, the temperature of the rear end of the thermal insulation component 10 is improved by weakening the cold conducting effect of the first cooling part 32 at the air inlet 211, so that the temperature of the rear end of the ice temperature drawer is improved, and the temperature uniformity of the front end and the rear end of the ice temperature drawer is realized.

Further, the cooling plate 3 includes an aluminum plate (not shown in the figure) and a heat insulating paste (not shown in the figure), the aluminum plate has a refrigerating effect through cold air, and the heat insulating paste can weaken the refrigerating effect. The heat preservation paste can be arranged on the aluminum plate. Wherein the part that has the heat preservation among the cooling plate 3 and pastes constitutes first cooling portion 32, does not have the part that keeps warm and pastes and constitutes second cooling portion 33 to make the cold conduction ability of first cooling portion 32 be less than the cold conduction ability of second cooling portion 33, and then weaken the cold conduction effect of first cooling portion 32 of air intake 211 department, thereby improve the subassembly 10 rear end temperature that keeps warm, in order to realize the whole temperature uniformity of ice temperature drawer. The heat preservation paste can be sponge and the like.

Further, the cooling plate 3 comprises an aluminum plate (not shown in the figure), the portion of the cooling plate 3 without the aluminum plate forms the first cooling portion 32, and the portion of the cooling plate 3 with the aluminum plate forms the second cooling portion 33, so as to weaken the cooling capacity of the first cooling portion 32, thereby increasing the temperature at the rear end of the thermal insulation assembly 10, and achieving the overall temperature uniformity of the ice temperature drawer.

Referring to fig. 4, fig. 4 is a schematic view of a first backside structure of the heat shield of the present application. With reference to fig. 1, the second is to enhance the heat exchange at the front end of the cooling plate 3, so as to reduce the temperature at the front end of the heat-insulating assembly 10, and further reduce the temperature at the front end of the ice-temperature drawer, thereby achieving the uniformity of the overall temperature of the ice-temperature drawer.

In some embodiments, for example, in order to improve the heat exchange at the front end of the air intake area 214, the heat blocking structure 6 may be disposed on the heat insulation plate 2 in the heat insulation assembly 10, and the heat exchange of the cold air at the front end of the air intake area 214 can be enhanced by the heat blocking structure 6, so that more cold air is transmitted at the front end of the air intake area 214, thereby reducing the temperature at the front end of the heat insulation assembly 10, further reducing the temperature at the front end of the ice temperature drawer, and achieving the uniformity of the overall temperature of the ice temperature drawer, so as to prevent the cold air from directly entering the air return opening 212 to be discharged.

The heat insulation plate 2 comprises a first side face and a second side face which are arranged oppositely, the air inlet 211 and the air return opening 212 are formed in the first side face, the air channel groove 21 is internally provided with the turbulence structure 6, the turbulence structure 6 is arranged close to the second side face compared with the first side face, and namely the turbulence structure 6 is arranged at the position, close to the second side face of the heat insulation plate 2, of the front end of the cooling plate 3. Therefore, more cold air can be transmitted at the front end of the air inlet area 214 through the turbulent flow structure 6, so that the temperature of the front end of the heat preservation assembly 10 is reduced, and the integral temperature uniformity of the ice temperature drawer is realized.

Further, vortex structure 6 includes a plurality of vortex muscle 61, and many vortex muscle 61 are located the one end that air intake 211 was kept away from in air inlet district 214, and all set up towards isolation platform 213 slope. Cooperate jointly through many vortex muscle 61 promptly for more cold wind in the transmission motion of intake zone 214 front end, and then reduced the temperature of cooling plate 3 front end, realize the reduction of heat preservation subassembly 10 front end temperature. In order to transmit cold air from different turbulence ribs 61 and reduce cold air interference between adjacent paths, the turbulence ribs 61 can be arranged at a height just abutting against the cooling plate 3.

The turbulence ribs 61 may be one, two, or more, wherein the turbulence ribs 61 may be arranged in a linear shape, an arc shape, or a drop shape, etc., and the configuration is not limited herein as long as the turbulence ribs 61 can transfer cold air to flow back to the air return area 215. The number of the turbulence ribs 61 is three in this embodiment, and the turbulence ribs are uniformly distributed at one end of the air inlet area 214 away from the air inlet 211, wherein the turbulence ribs 61 are all obliquely arranged, and the extending direction of the turbulence ribs 61 and the extending direction of the flow guide ribs 51 are vertically and symmetrically arranged.

The third is to promote the homogeneity of cold wind transmission, can improve the refrigeration homogeneity of cooling plate 3, and then realizes the homogeneity of the whole temperature of ice temperature drawer. If the internal structure of the heat insulation board 2 can be changed, the uniformity of cold air transmission can be realized.

As in some embodiments, the flow guide structure 5 is arranged in the air duct slot 21 of the heat insulation board 2, so that the uniformity of the cold air delivery is achieved by the flow guide structure 5. The flow guide structure 5 is disposed in the air inlet area 214, and the flow guide structure 5 is used for guiding and dispersing the cold air entering from the air inlet 211, so that the cold air uniformly flows back to the air return area 215 from the air inlet area 214, and further, the uniformity of the cold air delivery is improved, and the temperature distribution on the surface of the cooling plate 3 is uniform. The flow guide structure 5 may be any structure as long as it can disperse the cold air entering from the air inlet 211.

Specifically, the air guiding structure 5 includes a plurality of air guiding ribs 51, and the air guiding ribs 51 are formed by extending the air inlet 211 in different directions in the air inlet area 214 to disperse the cool air to any position in the air inlet area 214, so as to improve the uniformity of the surface temperature distribution of the air inlet area 214. In order to transmit cold air from different flow guiding ribs 51 and reduce cold air interference between adjacent paths, the flow guiding ribs 51 may be set to a height just abutting against the cooling plate 3.

The plurality of flow guide ribs 51 are arranged at the position far away from the air inlet 211 at the air inlet 211, and the plurality of flow guide ribs 51 can be arranged in a radial or horn shape, so that cold air is transmitted to the position far away from the air inlet 211 of the air inlet area 214, the cold air transmission area is increased, and the surface temperature distribution uniformity of the air inlet area 214 is further improved.

The number of the flow guiding ribs 51 may be one, two or more. The diversion rib 51 may be linear, arc, or curved, and is not limited herein, as long as the diversion rib 51 can disperse the airflow entering from the air inlet 211. In this embodiment, the diversion rib 51 near the isolation platform 213 is disposed in an arc shape, and the diversion rib 51 far from the isolation platform 213 is disposed in a curved shape, and is disposed obliquely from the air inlet 211 to a direction far from the air inlet 211. The distance between the two flow guiding ribs 51 gradually increases. The diversion ribs 51 are arranged in an arc shape, and can reduce the flow resistance of cold air.

In some embodiments, the amount of cool air between the isolation platform 213 and the nearest air guiding rib 51 is smaller than the amount of cool air between the adjacent air guiding ribs 51, so as to increase the lateral transfer area of cool air, and thus more cool air is transferred to a position far away from the air inlet 211. For example, the distance between the isolation platform 213 and the nearest air guide rib 51 and the distance between the adjacent air guide ribs 51 can be controlled to control the amount of the cool air. If the number of the air guiding ribs 51 is two in this embodiment, the closest distance between the isolation platform 213 and the closest air guiding rib 51 is smaller than the distance between two adjacent air guiding ribs 51, so that more cold air is transmitted to the surrounding position of the cooling plate 3. When the number of the air guide ribs 51 is three or more, the distance between the adjacent air guide ribs 51 is gradually increased in the direction gradually away from the separation table 213.

Specifically, the distance between the end of the isolation platform 213 far from the air inlet 211 and the side close to the heat insulation board 2 is equal to the width of the air return opening 212, so that the cold air in the air inlet area 214 flows back to the air return area 215 through the distance and is discharged from the air return area 215 back to the air return opening 212. For example, the distance between the end of the isolation platform 213 far away from the air inlet 211 and the side close to the heat insulation plate 2 is a as shown in FIG. 4.

In some embodiments, the ratio of the size of the intake vent 211 to the size of the return vent 212 is greater than or equal to 1.5, so as to facilitate the discharge of cool air from the return vent 212 to facilitate the flow of cool air. The size of the air inlet 211 can be 1.5 times, 1.6 times, 2 times, etc. the size of the air return 212. The size of the intake vent 211 may be the cross-sectional area of the intake vent 211, and the size of the return vent 212 may be the cross-sectional area of the return vent 212.

Therefore, the uniformity of the distribution of the front end and the rear end of the heat preservation assembly 10 is realized by improving the uniformity of cold air transmission, enhancing the heat exchange of the front end of the cooling plate 3 and changing the structure of the cooling plate 3, so that the uniformity of the front end and the rear end of the ice temperature drawer is improved.

Although the existing cold accumulation fresh-keeping component can refrigerate the drawer to reduce the fluctuation of the temperature in the drawer, the existing cold accumulation fresh-keeping component is complex in structure and inconvenient to install in the drawer and the refrigerator. Therefore, the structure of the heat preservation assembly 10 is simplified in the embodiment, and meanwhile, the heat preservation assembly 10 is used as an independent module and can be applied to matching any ice temperature drawer in a refrigerator.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the cover plate shown in fig. 1. The specific structure of the heat preservation assembly 10 is as follows: referring to fig. 1, the insulation assembly 10 includes a cover plate 1, an insulation board 2 and a cooling board 3, the cover plate 1 is formed with an installation groove 13, and a connection post 131 is provided in the installation groove 13 to penetrate through the insulation board 2. The connection column 131 of the cover plate 1 is inserted into the part of the insulation board 2 not forming the air duct groove 21, so that the insulation board 2 is connected with the cover plate 1, and the air duct groove 21 is not affected, thereby preventing cold air from leaking from the connection of the connection column 131 and the insulation board 2.

Because the connecting column 131 on the cover plate 1 penetrates through the heat insulation plate 2, and the connecting column 131 penetrates through the cooling plate 3, the cooling plate 3 and the heat insulation plate 2 are integrated in the mounting groove 13 of the cover plate 1, so that the heat insulation assembly 10 is simple in structure, and the mounting simplicity is simplified. The overall height of the insulating assembly 10 is determined by the thickness of the cover plate 1.

The number of the connecting columns 131 is one, two or more, and the number can be determined according to actual conditions. Two connecting columns 131 are arranged on two sides of the mounting groove 13 in the embodiment. The insulation board 2 is made of insulation material, such as foam. The cooling plate 3 may be an aluminum plate or a vapor chamber.

Furthermore, threaded holes (not shown) are formed in the connecting column 131, connecting holes 31 are formed in the cooling plate 3, and the positions and the number of the connecting holes 31 correspond to the positions and the number of the threaded holes. Screws (not shown) are sequentially inserted through the connecting holes 31 of the cooling plate 3 and connected to the threaded holes of the connecting posts 131, so that the screws are screwed into the threaded holes, and the cooling plate 3 is fixedly connected with the cover plate 1. The screws sequentially penetrate through the corresponding connecting holes 31 and the corresponding threaded holes, so that the heat insulation assembly 10 is convenient to mount and dismount. The connection post 131 may be a screw post or the like.

The portion of the heat insulation plate 2 not formed with the duct groove 21 is provided with a guide hole 234, and the guide hole 234 is used for passing through the connection post 131 to guide the connection post 131 to pass through, so that the cooling plate 3, the heat insulation plate 2 and the cover plate 1 can be conveniently installed, and the installation structure is simplified. The positions and the number of the guide holes 234 correspond to and are consistent with the positions and the number of the connecting holes 31 and the positions and the number of the threaded holes, respectively, and the connecting posts 131 penetrate through the corresponding guide holes 234 one by one. The guide hole 234 may have a cylindrical or rectangular shape. In this embodiment, two connection holes 31 are formed on both sides of the cooling plate 3, and two guide holes 234 are formed on both sides of the heat shield plate 2, wherein the guide holes 234 have a cylindrical shape.

In one embodiment, the cover plate 1 includes a bottom plate 11 and a side plate 12, and the side plate 12 is connected to the bottom plate 11 at an edge position, wherein the bottom plate 11 and the side plate 12 are enclosed to form the mounting groove 13. A fixing buckle 132 is formed at the edge of the side plate 12 toward the mounting groove 13, and the edge of the cooling plate 3 is inserted between the fixing buckle 132 and the heat insulation plate 2, so that the edge of the cooling plate 3 can be pre-positioned and fixed. Wherein, the rest edges of the cooling plate 3 are respectively lapped at the edge position of the heat insulation plate 2, so that the subsequent connection between the cooling plate 3 and the heat insulation plate 2 and between the cooling plate 3 and the cover plate 1 is convenient, and the installation simplicity of the heat insulation component 10 is further improved.

Meanwhile, the use amount of the follow-up screws and the time for installing the screws can be reduced by the plurality of fixing buckles 132, so that the installation operation of the heat preservation assembly 10 is simpler, the operation by one person is facilitated, and the simultaneous operation by a plurality of persons is not needed. The fixing clip 132 may have any structure as long as it can define the edge of the cooling plate 3, and is not limited thereto.

The fixing fastener 132 is protruded from the edge of the side plate 12, and the number of the fixing fasteners 132 may be one, two or more. When the number of the fixing buttons 132 is plural, the fixing buttons 132 are disposed at intervals at the side plate 12 in the cover plate 1. Since the fixing button 132 is protruded from the edge of the side plate 12 of the cover plate 1, when the heat insulation plate 2 is integrally installed in the installation groove 13, there may be installation interference between the edge of the heat insulation plate 2 and the fixing button 132, which may affect the installation of the heat insulation plate 2 in the cover plate 1. Therefore, the side of the heat insulation board 2 facing the side plate 12 where the fixing buckle 132 is disposed is provided with a corresponding avoiding buckle groove 235, the avoiding buckle groove 235 can avoid the fixing buckle 132, wherein the position and the number of the avoiding buckle groove 235 are correspondingly consistent with the position and the number of the fixing buckle 132.

In this embodiment, the cover plate 1 is provided with three side plates 12, wherein one side plate 12 is provided with four fixing fasteners 132, and the four fixing fasteners 132 fix one end of the cooling plate 3, wherein the other three ends of the cooling plate 3 are respectively overlapped at the edge of the heat insulation plate 2. The fixing fastener 132 is disposed in a square shape, and the fixing fastener 132 is disposed perpendicular to the side plate 12.

Referring to fig. 6 and 7, fig. 6 is a schematic front view of the heat shield shown in fig. 1; figure 7 is a second back side view of the thermal shield of figure 1.

In one embodiment, the side surface of the heat insulation board 2 and the surface facing the cover plate 1 are formed with a plurality of fixing grooves 231 together, the side surface and the bottom surface of the mounting groove 13 are provided with a plurality of fixing ribs 133 together, and each fixing rib 133 is inserted into one fixing groove 231. Mutually support through fixed muscle 133 and fixed slot 231 to make heat insulating board 2 side and mounting groove 13 side be connected, heat insulating board 2 is connected with mounting groove 13 bottom surface towards the surface of apron 1 simultaneously, not only can play the prepositioning effect, makes heat insulating board 2 coincide mounting groove 13 inner space completely moreover, and then has promoted the leakproofness between heat insulating board 2 and the apron 1.

In other embodiments, the side surface of the heat insulation board 2 and the surface facing the cover plate 1 are formed with a plurality of fixing ribs 133, the side surface and the bottom surface of the mounting groove 13 are formed with a plurality of fixing grooves 231, and each fixing rib 133 is inserted into one fixing groove 231. Mutually support through fixed muscle 133 and fixed slot 231 to make heat insulating board 2 side and mounting groove 13 side be connected, heat insulating board 2 is connected with mounting groove 13 bottom surface towards the surface of apron 1 simultaneously, not only can play the prepositioning effect, makes heat insulating board 2 coincide mounting groove 13 inner space completely moreover, and then has promoted the leakproofness between heat insulating board 2 and the apron 1.

The number of the fixing grooves 231 may be one or more; the number of the fixing ribs 133 may be one or more. The number and positions of the fixing grooves 231 correspond to those of the fixing ribs 133. Wherein the shape of the fixing groove 231 may be identical to the shape of the fixing rib 133. In this embodiment, the fixing rib 133 is a plate, and two ends thereof are perpendicular to the side surface and the bottom surface of the mounting groove 13; meanwhile, both ends of the fixing groove 231 are perpendicular to the side surface and the surface of the heat insulating plate 2, respectively. Of course, the fixing rib 133 may have other shapes, and is not limited herein.

Referring to fig. 8, 9 and 10, fig. 8 is a schematic structural diagram of B shown in fig. 1; FIG. 9 is a side schematic view of the cover plate shown in FIG. 1; fig. 10 is a schematic structural view of C shown in fig. 9.

In one embodiment, the cover plate 1 includes a bottom plate 11 and a side plate 12, and the side plate 12 is connected to the bottom plate 11 at an edge position, wherein the bottom plate 11 and the side plate 12 are enclosed to form the mounting groove 13. Wherein, bottom plate 11 is provided with snakelike connecting plate 134 near curb plate 12 department, and snakelike connecting plate 134 wears out the one end of curb plate 12 and constitutes catching part 1341, and this catching part 1341 is used for making heat preservation subassembly 10 install in the case courage of follow-up mentioning, has not only improved the simplicity that heat preservation subassembly 10 installed in the refrigerator, has improved the stability that heat preservation subassembly 10 installed in the case courage moreover, prevents to arouse heat preservation subassembly 10 to change because of the vibration position changes during the transport.

Because buckling portion 1341 is installed in the case courage, buckling portion 1341 atress in-process for snakelike connecting plate 134 is yielding, for providing the deformation space for snakelike connecting plate 134, can be provided with the groove 236 of dodging of snakelike connecting plate 134 in the side of heat insulating board 2, in order to dodge buckling portion 1341 deformation space through dodging groove 236.

Specifically, the upper side plate 12 of the cover plate 1 is formed with an avoidance buckling groove 135, and the avoidance buckling groove 135 is convexly provided toward the bottom plate 11. In the process that the buckling part 1341 is deformed under stress, the snake-shaped connecting plate 134 enters the space of the avoiding buckling groove 135 so as to avoid the deformation formed by the buckling part 1341 through the avoiding buckling groove 135; while avoiding the snap groove 135 can limit the degree of deformation of the snap 1341. Wherein the escape groove 236 of the side of the heat insulation plate 2 corresponds to the above-mentioned escape fastening groove 135.

In practice, the air duct groove 21 is formed by the enclosure formed between the cooling plate 3 and the heat insulation plate 2, and the air duct groove 21 is used for flowing cold air. Because of the connection of cooling plate 3 and heat insulating board 2, air intake 211 and return air inlet 212 all set up in the first side department of heat insulating board 2 simultaneously to make in heat insulating board 2 and the cooling plate 3 towards air intake 211 and return air inlet 212 position department easily make cold wind leak, and influence the leakproofness of heat preservation subassembly 10, and then influence heat preservation subassembly 10 and to the refrigeration function of ice temperature drawer.

Referring to fig. 11, fig. 11 is a schematic cross-sectional view of the heat-retaining assembly shown in fig. 1. Therefore, with reference to fig. 1, the thermal insulation assembly 10 further includes a thermal insulation board 4, the thermal insulation board 4 is disposed between the thermal insulation board 2 and the cooling board 3 and located at the first side of the cover plate 1, wherein the thermal insulation board 4 can seal other gaps between the thermal insulation board 2 and the cooling board 3 except the air inlet 211 and the air return 212, so that the cold air in the air duct groove 21 cannot leak into the ice temperature drawer from other gaps between the thermal insulation board 2 and the cooling board 3, and further the thermal insulation board 4, the thermal insulation board 2 and the cooling board 3 are enclosed to form a sealing space, so as to further improve the sealing performance of the thermal insulation assembly 10, and further improve the refrigeration effect of the thermal insulation assembly 10. The temperature-blocking plate 4 is made of heat-insulating material, and may be foam, for example.

Specifically, the air inlet 211 and the air return 212 can be formed by surrounding the temperature blocking plate 4, the heat insulating plate 2 and the cooling plate 3, and a side plate 12 does not need to be arranged on the cover plate 1 to form the air inlet 211 or the air return 212, so that the process steps are reduced. Namely, the heat insulation component 10 is improved in sealing performance by arranging the heat insulation plate 4.

In order to further improve the sealing performance between the temperature blocking plate 4 and the heat insulating plate 2 and the cooling plate 3, sealing treatment may be performed at the joints between the temperature blocking plate 4 and the cooling plate 3 and between the temperature blocking plate 4 and the heat insulating plate 2, respectively.

For example, the cooling plate 3 can be inserted into the temperature baffle plate 4 between the temperature baffle plate 4 and the heat insulation plate 2, so that the connection tightness between the temperature baffle plate 4 and the heat insulation plate 2 is improved, and the tightness of the heat insulation assembly 10 is further improved; meanwhile, the connection stability between the temperature baffle 4 and the cooling plate 3 is improved.

Referring to fig. 12 and 13, fig. 12 is a schematic structural view of the cooling plate and the temperature blocking plate shown in fig. 1; fig. 13 is a schematic view of the structure of E shown in fig. 12.

Specifically, one end of the heat insulation plate 4 facing the heat insulation plate 2 is provided with a linear heat insulation slot (not shown in the figure), and one end of the cooling plate 3 can be directly inserted into the heat insulation slot, so that the sealing performance of the heat insulation assembly 10 is further improved. Of course, the temperature blocking plate 4 and the cooling plate 3 may be sealed by other methods, such as adhesion, and the like, and the method is not limited herein.

Referring to fig. 7, for example, two insertion posts 22 may be disposed at a position of the heat insulation board 2 near the first side surface between the heat insulation board 4 and the heat insulation board 2, so that two ends of the heat insulation board 4 are inserted between the two insertion posts 22, thereby improving the connection sealing performance and stability between the heat insulation board 4 and the heat insulation board 2. Meanwhile, because the air inlet 211 and the air return 212 are both arranged between the temperature-blocking plate 4 and the heat-insulating plate 2, when the temperature-blocking plate 4 is inserted between the two inserting columns 22, the areas of the air inlet 211 and the air return 212 can be increased, so that the air inlet amount of the cold air of the air inlet 211 and the air return amount of the cold air of the air return 212 are increased. Of course, the sealing process between the heat insulation board 4 and the heat insulation board 2 can be performed by other methods, such as adhesion, and the like, and is not limited herein.

Referring to fig. 14 and 15, fig. 14 is a schematic view showing the structures of the heat insulating plate and the temperature blocking plate shown in fig. 1; fig. 15 is a schematic view of the structure of F shown in fig. 14.

In order to further improve the sealing performance between the heat shield 4 and the two plug-in posts 22 and the stability of the connection between the two plug-in posts, a surface of one plug-in post 22 facing the other plug-in post 22 is formed with a chute surface 221, and a surface of the other plug-in post 22 facing the one plug-in post 22 is formed with a chute surface 221, wherein the two chute surfaces 221 are both connected to a surface of the heat shield 2 facing away from the cover plate 1. Meanwhile, the two ends of the temperature baffle plate 4 are provided with inclined wedge surfaces 41, the temperature baffle plate 4 is inserted between the two insertion columns 22, and the inclined wedge surfaces 41 are matched with the inclined groove surfaces 221 so as to ensure that the temperature baffle plate 4 can be tightly matched with the heat insulation plate 2 after being installed, thereby improving the stability of the temperature baffle plate 4 installed on the heat insulation plate 2 and preventing the temperature baffle plate 4 from being separated; meanwhile, the sealing performance of the heat insulation plate 2 on which the heat insulation plate 4 is arranged is improved, and further the sealing performance of the heat insulation assembly 10 is improved.

Furthermore, a lap joint 222 is formed on the surface of the plug-in post 22 away from the cover plate 1, and a chute surface 221 is formed on the surface of one plug-in post 22 facing the other plug-in post 22, wherein the chute surface 221 and the lap joint 222 are arranged at an angle. One end of the cooling plate 3 is defined in the fixing buckle 132, and the other end of the cooling plate 3 opposite to the fixing buckle is defined on the two overlapping platforms 222 on the two inserting columns 22, so that the cooling plate 3 is defined on the heat insulation plate 2 to improve the sealing performance between the two. Meanwhile, when the temperature blocking plate 4 is inserted into the two inserting columns 22, the temperature blocking plate can be directly connected with one end of the cooling plate 3, so that the temperature blocking plate 4 and the cooling plate 3 are convenient to connect, and the sealing performance of the heat insulation assembly 10 is further improved.

Specifically, a predetermined groove 223 is formed at a position of the insertion column 22 near the return air opening 212, wherein the inclined groove surface 221 is disposed in the predetermined groove 223, and the inclined wedge surface 41 is fitted on the inclined groove surface 221 in the predetermined groove 223. The cold air exhaust area of the air return opening 212 can be increased by the insertion column 22 near the air return opening 212.

The inclined groove surface 221 is inclined, and the inclined groove surface 221 is inclined from the insertion column 22 to the heat insulation plate 2, and gradually approaches the bottom of the insertion column 22. The inclined wedge surface 41 is inclined in the same direction as the inclined groove surface 221 so that the two are tightly fitted and connected.

In addition, the overall height of the heat insulation assembly 10 is determined by the thickness of the cover plate 1, wherein the cover plate 1 comprises a bottom plate 11 and a side plate 12 connected to the edge of the bottom plate 11, so that the height of the installation groove 13 formed by enclosing the bottom plate 11 and the side plate 12 needs to be greater than or equal to the sum of the thickness of the heat insulation plate 2 and the thickness of the cooling plate 3, so that the heat insulation plate 2 and the cooling plate 3 are integrated in the installation groove 13 of the cover plate 1, and the structure of the heat insulation assembly 10 is more compact; meanwhile, the sealing performance between the heat insulation plate 2 and the cooling plate 3 is improved, and further the sealing performance of the heat insulation assembly 10 is improved.

From this, in order to realize the miniaturization of heat preservation subassembly 10, can limit the heat preservation subassembly 10 thickness that contracts to make this heat preservation subassembly 10 can install in the refrigerator in the arbitrary place that needs the installation, increased heat preservation subassembly 10's utilization ratio and practicality, can be applicable to in more different application scenarios. Of course, to achieve a larger insulation assembly 10, the thickness of the insulation assembly 10 may be varied to meet different practical requirements.

Referring to fig. 1 and 6, when the thermal insulation assembly 10 is applied to an ice temperature drawer (not shown), the temperature inside the thermal insulation assembly 10 needs to be monitored in real time to determine whether the thermal insulation assembly 10 is at the ice temperature.

Therefore, in an embodiment, the thermal insulation assembly 10 includes an air duct (not shown) and a cooling end (not shown), the ice temperature drawer is formed with an opening, and the thermal insulation assembly 10 covers the opening of the ice temperature drawer; the fan subassembly communicates in the wind channel to be used for providing cold wind for heat preservation subassembly 10, make heat preservation subassembly 10 refrigerate. Because of heat preservation subassembly 10 is located ice temperature drawer top, wherein the cooling end is towards ice temperature drawer for heat preservation subassembly 10 can be more fast to ice temperature drawer cooling, and then accelerates heat preservation subassembly 10 to the cooling speed of ice temperature drawer. The air passage is formed by the air passage groove 21. The cooling plate 3 is covered on the air duct groove 21, and serves as the cooling end.

Specifically, the heat-insulating assembly 10 is provided with a second temperature sensor (not shown in the figure) for detecting the temperature of the cooling end so as to detect the temperature of the cooling end in the heat-insulating assembly 10 in real time. Through above-mentioned second temperature sensor promptly to judge in real time whether the temperature in the subassembly 10 that keeps warm accords with food and is in the ice temperature range, and can accurately monitor temperature in the refrigerator, and then promote fresh-keeping effects such as food in the ice temperature drawer.

Since the second temperature sensor is disposed in the heat-insulating assembly 10, the second temperature sensor can accurately contact the temperature of the cooling end. In one embodiment, a mounting portion 14 is provided on the bottom surface of the mounting groove 13, and the mounting portion 14 is used for mounting a second temperature sensor; meanwhile, the heat insulating plate 2 is formed with a mounting hole 237, and the second temperature sensor passes through the mounting hole 237 and contacts the cooling plate 3, so that the second temperature sensor can contact the cooling plate 3, thereby monitoring the temperature of the cooling end in real time.

Referring to fig. 16, fig. 16 is a schematic structural diagram G shown in fig. 5. The end of the mounting portion 14 near the cooling plate 3 is formed with a sensor recess 141, and the sensor recess 141 is used for placing a second temperature sensor. Wherein the size and shape of the sensor recess 141 may correspond to the size and shape of the second temperature sensor. The sensor recess 141 has a cylindrical shape if the probe portion of the second temperature sensor is a metal cylinder. In practice, in order to make the second temperature sensor closely contact the cooling plate 3, the height of the mounting portion 14 needs to be sufficient to make the second temperature sensor closely contact the cooling plate 3.

Further, the duct groove 21 has an air inlet 211 and an air return 212, the air inlet 211 is used for the intake of cold air, and the air return 212 is used for the discharge of cold air. Meanwhile, an isolation stage 213 is provided in the duct groove 21, and the isolation stage 213 is used to isolate the air inlet 211 and the air return 212. By providing the isolation table 213, the cold air movement path and the cooling area of the cooling plate 3 can be increased. Wherein, keep apart platform 213 butt in cooling plate 3, mounting hole 237 is formed on keeping apart platform 213, because of keep apart platform 213 be located mounting groove 13 and be located the central point department of putting of apron 1, so that second temperature sensor is close to cooling plate 3 central point department of putting, and then measure cooling plate 3 central point, improve the accuracy nature of second temperature sensor measurement temperature, in order to avoid second temperature sensor direct mount in wind channel groove 21, and influence the flow of cold wind, avoid direct measurement cold wind temperature, and cause the phenomenon emergence of monitoring the temperature inaccuracy.

Since the second temperature sensor is mounted to the mounting portion 14, the connection wire of the second temperature sensor needs to extend out of the heat-insulating assembly 10 and then be connected to the external environment. However, during the actual installation or use of the thermal insulation assembly 10, the connecting wire is easily pulled, so that the position of the second temperature sensor is shifted, and the temperature detected by the second temperature sensor is inaccurate, so that the connecting wire needs to be defined.

In practice, in order to prevent the connection wires from being provided to the cooling plate 3 to affect the flow of the cold air in the air passage groove 21, the connection wires of the second temperature sensor are provided between the heat insulating plate 2 and the cover plate 1 to define the connection wires.

Specifically, a wire groove 232 is formed at a surface of the heat insulation board 2 facing the cover plate 1, and the wire groove 232 extends to an edge position of the heat insulation board 2, the wire groove 232 being used for placing a connection wire to prevent the connection wire from moving to affect a position change of the second temperature sensor. Since the insulation board 2 is installed in the installation groove 13, in order to extend the connection wires from the insulation assembly 10, the connection wires need to be passed out of the cover plate 1. If the cover plate 1 comprises a bottom plate 11 and a side plate 12, the side plate 12 is connected to the edge of the bottom plate 11, the bottom plate 11 and the side plate 12 are enclosed to form the mounting groove 13, wherein the side plate 12 is formed with a slot 136, the slot 136 is communicated with a corresponding slot 232, so that the connecting wire extends from the slot 136 to the external environment.

In actual process, in order to improve the stability of connecting wire installation, can buckle wire casing 232 and set up to connect the electric wire joint in the wire casing 232 of buckling, realize connecting wire's stable connection, further prevent that connecting wire from removing. In this embodiment, the slot 232 is arranged in a 7 shape.

In addition, a fixing member (not shown) may be disposed on the wire groove 232, so that the fixing member fixes the connecting wire, thereby further preventing the connecting wire from moving to affect the position change of the second temperature sensor. For example, the fixing member may be an adhesive member to adhere the connecting wire to the inside of the wire groove 232. Wherein the adhesive member may be a transparent adhesive tape or an aluminum foil adhesive tape.

Compared with the prior art, the heat insulation assembly of the refrigerator comprises a cover plate, a heat insulation plate and a cooling plate, wherein the cover plate is provided with a mounting groove; the heat insulation plate is arranged in the mounting groove, and a wind channel groove is formed on the surface of the heat insulation plate, which is far away from the cover plate; the air duct groove is located to the cooling plate lid, is provided with the cellular structure on the cooling plate to reduce the condensation phenomenon through the cellular structure and take place, convenient to use person uses.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (14)

1. An insulation assembly of a refrigerator, characterized in that the insulation assembly comprises:

a cover plate formed with a mounting groove;

the heat insulation plate is arranged in the mounting groove, and an air duct groove is formed on the surface of the heat insulation plate, which is far away from the cover plate;

the cooling plate is covered on the air duct groove, and a microporous structure is arranged on the cooling plate.

2. The insulation assembly of a refrigerator according to claim 1, wherein the micro-porous structure comprises a plurality of openings, and the opening has a pore size of 1.5mm or more and 2mm or less.

3. The heat insulating assembly of a refrigerator according to claim 2, wherein the heat insulating plate includes a first side and a second side which are oppositely disposed, the duct groove has an air inlet and an air return, and the air inlet and the air return are formed at the first side; and an isolation platform for isolating the air inlet and the air return inlet is arranged in the air duct groove.

4. The heat insulating assembly of the refrigerator as claimed in claim 3, wherein the insulating stage divides the air duct groove into an air inlet area corresponding to the air inlet and an air return area corresponding to the air return opening, the air inlet area and the air return area being communicated; the area of at least part of the openings in the air return area is larger than that of the openings in the air inlet area.

5. The insulation assembly of a refrigerator as defined in claim 4 wherein at least a portion of the openings in said return air zone are larger in size than the openings in said intake air zone;

and/or the density of the holes in at least part of the unit area of the air return area is greater than that of the holes in the unit area of the air inlet area.

6. The temperature keeping assembly of claim 3, wherein the cooling plate includes a first cooling portion having a smaller cooling capacity than a second cooling portion, and a second cooling portion covering the air inlet.

7. The heat-retaining assembly of a refrigerator according to claim 6, wherein the cooling plate includes an aluminum plate and a heat-retaining patch provided on the aluminum plate, and a portion of the cooling plate having the heat-retaining patch constitutes the first cooling portion, and a portion not having the heat-retaining patch constitutes the second cooling portion.

8. The temperature keeping assembly for a refrigerator according to claim 6, wherein the cooling plate includes an aluminum plate, a portion of the cooling plate not having the aluminum plate constitutes the first cooling portion, and a portion of the cooling plate having the aluminum plate constitutes the second cooling portion.

9. The heat insulating assembly of a refrigerator as claimed in claim 3, wherein a turbulent flow structure is provided in the air duct groove, the turbulent flow structure being disposed closer to the second side surface than the first side surface.

10. The heat preservation assembly of a refrigerator as claimed in claim 9, wherein the spoiler structure includes a plurality of spoiler ribs, the plurality of spoiler ribs being inclined toward the isolation stage.

11. The heat insulating assembly of the refrigerator as claimed in claim 3, wherein the insulating stage divides the air duct groove into an air inlet area corresponding to the air inlet and an air return area corresponding to the air return opening, the air inlet area and the air return area being communicated; and a flow guide structure is arranged in the air inlet area and used for guiding and dispersing the air flow entering from the air inlet.

12. The heat insulating assembly of a refrigerator as claimed in claim 11, wherein the air guide structure includes a plurality of air guide ribs extending from the air inlet to the air inlet area in different directions.

13. The insulation assembly of a refrigerator according to claim 12, wherein a distance between the isolation platform and the adjacent air guide ribs is smaller than a distance between adjacent air guide ribs.

14. The insulation assembly of a refrigerator as claimed in any one of claims 3 to 13, wherein the distance between the end of the insulation platform away from the air inlet and the side close to the insulation board is equal to the width of the air return opening.

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