Air-cooled moisturizing refrigerator

Abstract

The air-cooled moisturizing refrigerator comprises a refrigerator body, a refrigerating chamber and a freezing chamber, wherein the refrigerating chamber and the freezing chamber are arranged in the refrigerator body, and the freezing chamber is located below the refrigerating chamber; the air supply duct is arranged in the refrigerator body and communicates with the refrigerating chamber and the freezing chamber; the air return duct is arranged in the box body; the refrigerating chamber and the freezing chamber are each provided with an air return opening, and the air return openings communicate with an inlet of the air return duct. An outlet of the air return duct communicates with the air supply duct. The moisturizing air duct is arranged in the box body; an inlet of the moisturizing air duct is communicated with the air return duct and is positioned below an air return port of the refrigerating chamber; the outlet of the moisturizing air duct communicates with the freezing chamber, so that a part of return air of the refrigerating chamber can be shunted to the freezing chamber, the freezing chamber is humidified through water vapor carried by the return air of the refrigerating chamber, condensation is generated in the freezing chamber through the temperature difference between the return air of the refrigerating chamber and the freezing chamber, the humidity of the freezing chamber is increased, and the food fresh-keeping effect of the freezing chamber is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerators, in particular to a wind-cooled and moisture-preserving refrigerator. BACKGROUND

[0002] In the existing refrigerator products, the air-cooled refrigerator has become the mainstream in the market. The existing technology usually realizes the temperature reduction of the freezing chamber and the refrigerating chamber through air duct circulation. With the increasing demand of consumers for food preservation, especially the increasing attention to the quality of food in the freezing chamber.

[0003] However, the existing products mainly focus on the regulation of the humidity in the refrigerating chamber, and lack effective improvement measures for the humidity in the freezing chamber. Due to the low humidity in the freezing chamber, the food is prone to evaporate water when stored for a long time, resulting in weight loss and causing the surface of meat to become white and dry, and fruits and vegetables to wither, thereby reducing the freshness and taste of the food. This problem has become a prominent deficiency of the air-cooled refrigerator in the aspect of frozen preservation.

[0004] Therefore, there is an urgent need for a technical solution that can effectively improve the humidity in the freezing chamber and improve the problem of dry food and reduced taste. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a wind-cooled and moisture-preserving refrigerator to solve the problem of low humidity in the freezing chamber in the prior art, which leads to insufficient frozen preservation of food.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows: A wind-cooled and moisture-preserving refrigerator, comprising a cabinet and a refrigerating chamber and a freezing chamber arranged in the cabinet, wherein the freezing chamber is located below the refrigerating chamber, and further comprising: an air supply air duct arranged in the cabinet and communicating with the refrigerating chamber and the freezing chamber respectively; a return air duct arranged in the cabinet; the refrigerating chamber and the freezing chamber are both provided with a return air port, the return air port communicates with the inlet of the return air duct, and the outlet of the return air duct communicates with the air supply air duct; a moisture-preserving air duct arranged in the cabinet; the inlet of the moisture-preserving air duct communicates with the return air duct and is located below the return air port of the refrigerating chamber, and the outlet of the moisture-preserving air duct communicates with the freezing chamber.

[0007] The wind-cooled and moisture-preserving refrigerator, wherein the return air port of the freezing chamber is located on the back surface of the freezing chamber, and the outlet of the moisture-preserving air duct is located on the side surface of the freezing chamber.

[0008] The wind-cooled and moisture-preserving refrigerator, wherein the outlet of the moisture-preserving air duct is close to the top surface of the freezing chamber.

[0009] The air-cooled humidifying refrigerator, wherein the humidifying air duct is horizontally arranged, and the inlet and the outlet of the humidifying air duct are located in the same horizontal plane.

[0010] The air-cooled humidifying refrigerator further comprises: A fan is arranged in the humidifying air duct.

[0011] The air-cooled humidifying refrigerator, wherein the distance between the fan and the outlet of the humidifying air duct is less than the distance between the fan and the inlet of the humidifying air duct.

[0012] The air-cooled humidifying refrigerator, wherein the freezing chamber comprises: A freezing chamber liner is arranged on the freezing chamber, and a humidifying air inlet is arranged on the freezing chamber liner and communicates with the outlet of the humidifying air duct. A plurality of drawers are arranged in the freezing chamber liner and arranged in the vertical direction, and a ventilation hole is arranged on the drawer and communicates with the humidifying air inlet.

[0013] The air-cooled humidifying refrigerator further comprises: A convex rib structure is arranged on the inner wall of the humidifying air duct.

[0014] The air-cooled humidifying refrigerator, wherein the convex rib structure comprises: A plurality of ribs are arranged around the inner wall of the humidifying air duct, and the ribs are arranged in the length direction of the humidifying air duct.

[0015] The air-cooled humidifying refrigerator, wherein the convex rib structure comprises: A rib is arranged in a spiral shape and extends in the length direction of the humidifying air duct.

[0016] Beneficial effects: In the present application, a humidifying air duct is connected below the return air inlet of the refrigeration chamber on the return air duct, and the outlet of the humidifying air duct communicates with the freezing chamber. A part of the return air of the refrigeration chamber to the air supply duct can be diverted to the freezing chamber before returning to the air supply duct. By using the energy of the refrigerator itself, the humidity of the freezing chamber can be improved by using the water vapor carried by the return air of the refrigeration chamber to humidify the freezing chamber and the condensation generated in the freezing chamber by the temperature difference between the return air of the refrigeration chamber and the freezing chamber, thereby solving the problem of dry food and poor taste caused by low humidity in the freezing chamber in the prior art, and improving the preservation effect of food in the freezing chamber. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the first view of the air-cooled humidifying refrigerator in the present application; Figure 2 is the second view of the air-cooled humidifying refrigerator in the present application; Figure 3 This is a schematic diagram of the distribution structure between the humidification air duct, the return air duct, and the freezer chamber in this invention; Figure 4 This is a schematic diagram of the internal structure of the freezer inner liner in this invention; Figure 5 This is a schematic diagram of the drawer structure in this invention; Figure 6 This is a schematic diagram of the straight rib structure in this invention; Figure 7 This is a schematic diagram of the distribution structure of the straight ribs in the moisture-retaining air duct in this invention; Figure 8 This is a schematic diagram of the distribution structure of the spiral ribs in the moisture-retaining air duct in this invention. Detailed Implementation

[0018] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0019] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0020] This invention provides a wind-cooled, humidified refrigerator, such as... Figure 1 , Figure 2 and Figure 3As shown, the air-cooled and humidified refrigerator includes: a refrigerator compartment 1, a freezer compartment 2, an air supply duct 3, a return air duct 4, a humidification duct 5, and a cabinet 8; the freezer compartment 2 is located below the refrigerator compartment 1, the air supply duct 3 is located inside the cabinet 8 and is connected to both the refrigerator compartment 1 and the freezer compartment 2; the return air duct 4 is located inside the cabinet 8; both the refrigerator compartment 1 and the freezer compartment 2 are provided with return air inlets, which are connected to the inlet of the return air duct 4; the outlet of the return air duct 4 is connected to the air supply duct 3; the humidification duct 5 is located inside the cabinet 8; the inlet of the humidification duct 5 is connected to the return air duct 4 and is located below the return air inlet of the refrigerator compartment 1; the outlet of the humidification duct 5 is connected to the freezer compartment 2.

[0021] Specifically, the supply air duct 3 and the return air duct 4 are both located near the rear of the freezer compartment 2 and the refrigerator compartment 1, and are both located inside the cabinet 8; the supply air duct 3 is equipped with an evaporator 31, and the evaporator 31 is close to the freezer compartment 2, that is, the evaporator 31 is located at the bottom of the supply air duct 3; the refrigerator compartment 1 and the freezer compartment 2 are both equipped with air inlets, so that the air is cooled by the evaporator 31 and then transported upwards, entering the storage space 211 of the freezer compartment 2 and the storage space 211 of the refrigerator compartment 1 in sequence, to provide cooling for the freezer compartment 2 and the refrigerator compartment 1. Both the refrigerator compartment 1 and the freezer compartment 2 are equipped with return air vents, which are connected to the return air duct 4. The outlet of the return air duct 4 is connected to the supply air duct 3, and the outlet of the return air duct 4 is located below the evaporator 31. This allows the air in the refrigerator compartment 1 and the freezer compartment 2 to pass through the return air vents and enter the return air duct 4. Under the guidance of the return air duct 4, the air flows back into the supply air duct 3, and after being cooled again by the evaporator 31, it is released into the freezer compartment 2 and the refrigerator compartment 1, thus forming a circulating cooling of air in the refrigerator.

[0022] An adapter is provided on the return air duct 4 to connect to the humidification air duct 5, that is, to the inlet of the humidification air duct 5; the inlet of the humidification air duct 5 is located below the return air vent of the refrigerator compartment 1, and the outlet of the humidification air duct 5 is connected to the freezer compartment 2. Then, the air entering the return air duct 4 from the return air vent of the refrigerator compartment 1 will be split between returning to the supply air duct 3, and a part of the air returning from the refrigerator compartment 1 can enter the freezer compartment 2 from the outlet of the humidification air duct 5. The temperature of refrigerator compartment 1 is usually between 2℃ and 8℃, which is much higher than that of freezer compartment 2. In this temperature range, the air can absorb more moisture, and the fruits, vegetables and other food in refrigerator compartment 1 will also continuously release moisture. Therefore, the return air in refrigerator compartment 1 contains more moisture. Moreover, the temperature difference between the return air in refrigerator compartment 1 and freezer compartment 2 is large, which produces condensation. Therefore, the return air in refrigerator compartment 1 is passed through the humidification channel to humidify the food in freezer compartment 2, thereby increasing the humidity of freezer compartment 2. This solves the problem of meat drying and turning white due to low humidity in the freezer compartment in the existing technology, and improves the preservation effect of meat in freezer compartment 2.

[0023] Therefore, in this application, a humidifying air duct 5 is connected to the return air duct 4 below the return air inlet of the refrigerator compartment 1, and the outlet of the humidifying air duct 5 is connected to the freezer compartment 2. This allows a portion of the return air from the refrigerator compartment 1 to the supply air duct 3 to be diverted to the freezer compartment 2 before flowing back to the supply air duct 3. By utilizing the refrigerator's own energy, the water vapor carried by the return air from the refrigerator compartment 1 can be used to humidify the freezer compartment 2, and the temperature difference between the return air from the refrigerator compartment 1 and the freezer compartment 2 can be used to generate condensation in the freezer compartment 2, thereby increasing the humidity of the freezer compartment 2. This solves the problem of low humidity in the freezer compartment causing food to dry out and lose its taste in the prior art, and improves the preservation effect of meat in the freezer compartment 2.

[0024] In one embodiment of this application, the return air vent of the freezer compartment 2 is located at the back of the freezer compartment 2, and the outlet of the humidifying air duct 5 is located on the side of the freezer compartment 2.

[0025] Specifically, both the supply air duct 3 and the return air duct 4 are located on the back of the refrigerator compartment 1 and the freezer compartment 2. The return air vent of the freezer compartment 2 is located on the back of the freezer compartment 2, and the return air vent of the refrigerator compartment 1 is also located on the back of the refrigerator compartment 1. This allows the air to flow back to the supply air duct 3 after passing through the refrigerator compartment 1 and the freezer compartment 2, forming the shortest circulation loop, reducing airflow detours, improving heat exchange efficiency, reducing frost formation, and facilitating the structural integration between the return air vent and the return air duct 4.

[0026] The outlet of the humidifying air duct 5 is located on the side of the freezer compartment 2, that is, an opening is made on the side of the freezer compartment 2 and connected to the humidifying air duct 5, so that the return air from the refrigerator compartment 1 is supplied to the freezer compartment 2 through the humidifying air duct 5. The return air inlet of the freezer compartment 2 is located at the back of the freezer compartment 2, and the outlet of the humidifying air duct 5 is located on the side of the freezer compartment 2, so that the return air inlet of the freezer compartment 2 and the outlet of the humidifying air duct 5 are distributed on different sides of the freezer compartment 2, thereby keeping the return air inlet of the freezer compartment 2 and the outlet of the humidifying air duct 5 far apart, avoiding the air supplied to the freezer compartment 2 by the humidifying air duct 5 being directly drawn into the return air inlet of the freezer compartment 2, causing a short-circuit circulation; at the same time, a sufficient distance is maintained between the return air inlet of the freezer compartment 2 and the outlet of the humidifying air duct 5 to form air mixing, allowing the humid air to diffuse evenly in the freezer compartment 2 before entering the return air inlet of the freezer compartment 2.

[0027] In one embodiment of this application, the outlet of the humidifying air duct 5 is close to the top surface of the freezer compartment 2.

[0028] Specifically, the outlet of the humidifying air duct 5 is close to the top surface of the freezer compartment 2. That is, the return air of the refrigerator compartment 1 in the humidifying air duct 5 enters the freezer compartment 2 from a higher position in the freezer compartment 2. It can circulate and mix evenly inside the freezer compartment 2, so that the humidity of the entire space is increased evenly, avoiding the uneven phenomenon of the bottom being too wet and the top being dry.

[0029] Meanwhile, since the bottom temperature of the freezer compartment 2 is usually lower, if humid air enters the freezer compartment 2 directly from the bottom, it will quickly condense into frost. Therefore, in this embodiment, the outlet of the humidifying air duct 5 is designed to be near the top surface of the freezer compartment 2, and an opening is made at the outlet position of the humidifying air duct 5 in the freezer compartment 2, so that humid air can enter the freezer compartment 2 from a relatively high position, delaying the cooling and condensation of water vapor and reducing the ice formation at the bottom.

[0030] In one embodiment of this application, the humidifying air duct 5 is arranged horizontally, and the inlet and outlet of the humidifying air duct 5 are located in the same horizontal plane.

[0031] Specifically, since the air inside the humidifying air duct 5 carries a certain level of humidity, and the outlet of the humidifying air duct 5 connects to the low-temperature freezer compartment 2, resulting in a significant temperature difference, if the humidifying air duct 5 is arranged at an angle, condensation is likely to accumulate at its lowest point, potentially leading to icing and blockage. In this embodiment, the inlet and outlet of the humidifying air duct 5 are located on the same horizontal plane, making the entire duct horizontally arranged. Therefore, the return air from the refrigerator compartment 1 enters the humidifying air duct 5 at its inlet and flows horizontally into the freezer compartment 2.

[0032] In one embodiment of this application, the air-cooled humidifying refrigerator further includes a fan 6, which is disposed within the humidifying air duct 5.

[0033] Specifically, this application also adds a fan 6 inside the humidification duct 5. The fan 6 guides the airflow to ensure that at least a portion of the return air from the refrigerator compartment 1 can smoothly enter the freezer compartment 2, thereby increasing the humidity of the freezer compartment 2.

[0034] Meanwhile, since the humidifying air duct 5 is arranged horizontally in this application, it is more advantageous to arrange and install the fan 6 within the horizontal humidifying air duct 5.

[0035] In one embodiment of this example, the distance between the outlet of the fan 6 and the humidifying air duct 5 is less than the distance between the inlet of the fan 6 and the humidifying air duct 5.

[0036] Specifically, between the outlet and inlet of the humidifying air duct 5, the distance from the fan 6 to the outlet of the humidifying air duct 5 is less than the distance from the fan 6 to the inlet of the humidifying air duct 5. This makes the fan 6 closer to the outlet of the humidifying air duct 5 than to the inlet of the humidifying air duct 5. Near the outlet of the humidifying air duct 5, the fan 6 guides the air, "spraying" air with a certain humidity into the effective volume of the freezer compartment 2, forming a jet, which promotes the rapid mixing of humid air with the air inside the freezer compartment 2. Even though the length of the humidifying air duct 5 is relatively short and the pressure drop is small due to the overall space volume limitation of the refrigerator, the local kinetic energy of the fan 6 near the outlet of the humidifying air duct 5 is more conducive to expanding the area affected by moisture.

[0037] Furthermore, under the power of the fan 6, the air entering the freezer chamber 2 from the humidification duct 5 can first mix with the air inside the freezer chamber 2 and then flow back from the return air vent of the freezer chamber 2, thus avoiding the airflow short-circuiting that would occur when the moisture enters the freezer chamber 2 and is drawn back by the return air vent of the freezer chamber 2.

[0038] Meanwhile, since the fan 6 is closer to the outlet end of the humidifying air duct 5 and farther away from the inlet end of the humidifying air duct 5, the fan 6 is further away from the return air duct 4, thereby reducing the adverse disturbance effect of the operation of the fan 6 on the return air duct 4.

[0039] In one embodiment of this application, the cross-section of the humidifying air duct 5 along the height direction of the refrigerator is square or rectangular, rather than circular. The space between the freezer compartment 2 and the refrigerator's outer shell is typically a flat, narrow space; therefore, designing the humidifying air duct 5 as square or rectangular allows it to fit snugly against the inner wall of the refrigerator's outer shell, thus saving limited space. Simultaneously, the square or rectangular humidifying air duct 5 creates a larger contact area with the inner wall of the refrigerator's outer shell, resulting in a stable structure that is less prone to displacement.

[0040] One embodiment of this application, such as Figure 2 and Figure 3 As shown, the freezer compartment 2 includes an inner liner 21 and multiple drawers 22; the inner liner 21 is equipped with a humidification air inlet, which is connected to the outlet of the humidification duct 5; the multiple drawers 22 are disposed inside the inner liner 21 and arranged vertically; each drawer 22 is equipped with a ventilation hole 221 (e.g., ...). Figure 5 As shown in the figure, ventilation hole 221 is connected to humidification air inlet.

[0041] Specifically, the humidifying air duct 5 is located outside the freezer inner liner 21, and the outlet of the humidifying air duct 5 is flush with and connected to the humidifying air inlet. Multiple drawers 22 are arranged in the freezer inner liner 21 along the height direction of the refrigerator, i.e., the vertical direction, and each drawer 22 is provided with a ventilation hole 221, so that the space inside the drawer 22 is connected to the humidifying air inlet through the ventilation hole 221, thereby realizing the connection between the space inside the drawer 22 and the outlet of the humidifying air duct 5.

[0042] It is understandable that the position of the ventilation hole 221 on the drawer 22 corresponds to the position of the humidifying air duct 5. That is, if the humidifying air duct 5 is located on the left side of the freezer compartment 2, then the ventilation hole 221 is arranged on the left side of the drawer 22; if the humidifying air duct 5 is located on the right side of the freezer compartment 2, then the ventilation hole 221 is arranged on the right side of the drawer 22, so that the ventilation hole 221 is closer to the humidifying air duct 5, and more humid air in the humidifying air duct 5 can enter the drawer 22 more efficiently.

[0043] In one embodiment of this invention, the drawer 22 has an opening at the top, and a cover is provided on the top of the drawer 22. The cover can slide back and forth relative to the drawer 22 to open and close the opening. The cover is a transparent cover, making it easy to observe the state of the food inside the drawer 22.

[0044] In one embodiment of this application, the freezer inner liner 21 includes an inner liner body and a partition plate. The partition plate is vertically disposed in the inner liner body and divides the inner liner body into two spaces (i.e., storage space 211 and air supply duct space 212) along the front-to-back direction. Figure 4 (As shown); the space on the front side is the storage space 211, the space on the rear side is the air supply duct space 212, the air supply duct space 212 is part of the air supply duct 3, and the evaporator 31 is located in the air supply duct space 212, and the drawer 22 is located in the storage space 211.

[0045] In one embodiment of this application, the air-cooled humidifying refrigerator further includes a ribbed structure 7, which is disposed on the inner wall of the humidifying air duct 5.

[0046] Specifically, the rib structure 7 is located within the humidifying air duct 5 and protrudes from the inner wall of the humidifying air duct 5, without completely occupying the internal space of the humidifying air duct 5, so as to ensure that humid air can pass through the humidifying air duct 5 and enter the freezer compartment 2. It is understandable that the rib structure 7 is not installed at the fan 6 location within the humidifying air duct 5 because space needs to be made for the installation of the fan 6.

[0047] The return air in the refrigerator compartment 1 has high humidity. If it blows directly into the freezer compartment 2, it is easy for frost to form quickly in a localized area, which is not conducive to maintaining the humidity in the freezer compartment 2. Therefore, in this embodiment, a rib structure 7 is provided on the inner wall of the humidifying air duct 5, and the rib structure 7 extends from the inlet of the humidifying air duct 5 to the outlet of the humidifying air duct 5. This rib structure 7 disturbs the airflow in the humidifying air duct 5, disperses the airflow, promotes the flow field distribution, and avoids local condensation from concentrating at a certain point, thereby reducing the risk of icing.

[0048] As can be seen, in this embodiment, the convex rib structure 7 can disturb and guide the airflow in the humidifying air duct 5, thereby avoiding localized drying or frost caused by direct return air blowing in the refrigerator compartment 1, achieving uniform airflow distribution, improving the efficiency of humidity transfer in the freezer compartment 2, and thus effectively improving the preservation effect of food.

[0049] In one embodiment of this invention, the rib structure 7 includes multiple ribs, which are arranged around the inner wall of the humidifying air duct 5; the ribs extend along the length of the humidifying air duct 5.

[0050] Specifically, such as Figure 6 and Figure 7As shown, the ribs are straight ribs and extend along the length of the humidifying air duct 5; ribs are provided on the top, bottom, left and right sides of the humidifying air duct 5, and there is a gap between two adjacent ribs on the same side.

[0051] The straight ribs are arranged parallel to the moisturizing air duct 5, which can guide the incoming airflow and allow the airflow to smoothly transition to the outlet of the moisturizing air duct 5 along the direction of the moisturizing air duct 5. This makes the airflow more controllable and stable, avoids local condensation and accumulation, and reduces the risk of icing in the moisturizing air duct 5.

[0052] The radial cross-section of the straight ribs can be rectangular, square, or curved.

[0053] Meanwhile, compared to other shapes of convex rib structure 7, the straight rib structure is the simplest and easier to integrally form with the wall of the square or rectangular moisturizing air duct 5, which is beneficial for mold design and thus mass production.

[0054] In another embodiment of this invention, the rib structure 7 includes ribs that are spiral-shaped and extend along the length of the humidifying air duct 5.

[0055] Specifically, such as Figure 8 As shown, spiral ribs are set on the inner side surface (left and right sides) of the moisturizing air duct 5, which allows the airflow to form a rotating or spiral flow trajectory within the moisturizing air duct 5. The outgoing airflow is in a dispersed state, avoiding direct impact on the surface of the food and reducing the drying of the food. At the same time, the spiral disturbance causes the airflow to tumble continuously, reducing the stagnation area of ​​gas molecules and preventing water vapor from accumulating in a certain position in the moisturizing air duct 5. This continuous spiral turbulence can delay or alleviate the icing problem of the moisturizing air duct 5.

[0056] Through multiple tests, the dry loss of the freezer compartment in the existing technology reaches 5.1%, while the air-cooled humidified refrigerator of this application can reduce the dry loss of the freezer compartment 2 to 1.9%.

[0057] In summary, this application also provides a wind-cooled and humidified refrigerator, which includes a refrigerator compartment and a freezer compartment disposed below the refrigerator compartment. It further includes: a supply air duct disposed within the refrigerator body and connected to both the refrigerator compartment and the freezer compartment; a return air duct disposed within the refrigerator body; both the refrigerator compartment and the freezer compartment are provided with return air inlets, which are connected to the inlets of the return air ducts; the outlet of the return air duct is connected to the supply air duct; and a humidification air duct disposed within the refrigerator body; the inlet of the humidification air duct is connected to the return air duct and located below the return air inlet of the refrigerator compartment; the outlet of the humidification air duct is connected to the freezer compartment. In this application, a humidifying air duct is connected below the return air vent of the refrigerator compartment on the return air duct, and the outlet of the humidifying air duct is connected to the freezer compartment. This allows a portion of the return air from the refrigerator compartment to the supply air duct to be diverted to the freezer compartment before flowing back to the supply air duct. By utilizing the refrigerator's own energy, the water vapor carried by the return air from the refrigerator compartment can be used to humidify the freezer compartment, and the temperature difference between the return air from the refrigerator compartment and the freezer compartment can be used to generate condensation in the freezer compartment, thereby increasing the humidity of the freezer compartment. This solves the problem of low humidity in the freezer compartment causing food to dry out and lose its taste in the prior art, and improves the preservation effect of meat in the freezer compartment.

[0058] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0059] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

Claims

1. A frost-free, humidified refrigerator, comprising a cabinet and a refrigerator compartment and a freezer compartment disposed within the cabinet, wherein the freezer compartment is located below the refrigerator compartment, characterized in that, It also includes: An air supply duct is installed inside the cabinet and is connected to the refrigerator compartment and the freezer compartment respectively; A return air duct is installed inside the cabinet; both the refrigerator compartment and the freezer compartment are equipped with return air inlets, which are connected to the inlet of the return air duct; the outlet of the return air duct is connected to the supply air duct. A humidifying air duct is installed inside the cabinet; the inlet of the humidifying air duct is connected to the return air duct and is located below the return air vent of the refrigerator compartment; the outlet of the humidifying air duct is connected to the freezer compartment.

2. The air-cooled humidifier refrigerator according to claim 1, characterized in that, The return air vent of the freezer compartment is located at the back of the freezer compartment, and the outlet of the humidifying air duct is located on the side of the freezer compartment.

3. The air-cooled humidifier refrigerator according to claim 2, characterized in that, The outlet of the humidifying air duct is located near the top surface of the freezer compartment.

4. The air-cooled humidifier refrigerator according to claim 1, characterized in that, The humidifying air duct is arranged horizontally, and the inlet and outlet of the humidifying air duct are located in the same horizontal plane.

5. The air-cooled humidifier refrigerator according to claim 1, characterized in that, It also includes: A fan is installed inside the moisture-retaining air duct.

6. The air-cooled, humidified refrigerator according to claim 5, characterized in that, The distance between the fan and the outlet of the humidifying air duct is less than the distance between the fan and the inlet of the humidifying air duct.

7. The air-cooled humidifier refrigerator according to claim 1, characterized in that, The freezer compartment includes: The freezer inner liner is provided with a humidification air inlet, which is connected to the outlet of the humidification air duct. Multiple drawers are located inside the freezer inner liner and arranged vertically; each drawer is provided with a ventilation hole, which is connected to the humidification air inlet.

8. The air-cooled humidifier refrigerator according to claim 1, characterized in that, It also includes: A rib structure is provided on the inner wall of the humidifying air duct.

9. The air-cooled, humidified refrigerator according to claim 8, characterized in that, The rib structure includes: Multiple ribs are arranged around the inner wall of the moisturizing air duct; the ribs extend along the length of the moisturizing air duct.

10. The air-cooled, humidified refrigerator according to claim 8, characterized in that, The rib structure includes: The ribs are spiral-shaped and extend along the length of the moisture-retaining air duct.

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