Air duct assembly, inner container and refrigeration equipment

Abstract

The utility model provides a kind of air duct assembly, inner bag and refrigeration equipment, air duct assembly includes main casing, the main casing has the first side and second side being oppositely arranged along first direction;With the cover of the main casing cooperation, the arrangement direction of the main casing and the cover is perpendicular to the first direction;First return air inlet, it is set to the first side of the main casing;Second return air inlet, it is set to the second side of the main casing.The utility model by the first return air inlet, the second return air inlet is separately arranged in the two sides of the main casing along the first direction, first can improve return air quantity;Second, the air in refrigeration compartment can flow into air duct assembly along the two sides of the first direction, to be even heat exchange with the evaporator, improve heat exchange efficiency;Finally, it can extend return air path, prevent the position that refrigeration compartment is communicated with the first return air inlet, the second return air inlet due to temperature is lower and produce frost or ice.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and in particular to a duct component, inner liner and refrigeration equipment. Background Technology

[0002] The duct assembly incorporates a cooling system for the refrigerated compartments, including an evaporator and a fan. Typically, air supply and return vents are located on the duct assembly's casing to cool the compartments. For modular liner designs, the duct assembly can be positioned between two refrigerated compartments to simultaneously cool both. In this case, the locations of the air supply and return vents can be flexibly chosen. This application aims to provide a design that ensures uniform return airflow and effectively reduces the probability of frost or ice buildup in the compartments.

[0003] In view of this, it is necessary to provide an air duct assembly to solve the above-mentioned technical problems. Utility Model Content

[0004] To achieve the above objectives, this utility model provides an air duct assembly, which includes a main housing having a first side and a second side disposed opposite to each other along a first direction; a cover plate that cooperates with the main housing, wherein the arrangement direction of the main housing and the cover plate is perpendicular to the first direction; a first return air inlet disposed on the first side of the main housing; and a second return air inlet disposed on the second side of the main housing.

[0005] As a further improvement of this utility model, the main housing includes a first side plate located on a first side, a second side plate located on a second side, and a back plate connected between the first side plate and the second side plate, wherein the back plate and the cover plate are disposed opposite to each other; The first return air vent is located on the first side panel, and the second return air vent is located on the second side panel.

[0006] As a further improvement of this utility model, it also includes a first air supply port located on the back plate, and the first return air port and the second return air port are located below the first air supply port.

[0007] As a further improvement of this utility model, the main housing and the cover plate surround to form a cooling cavity, and the first return air inlet and the second return air inlet are connected to the cooling cavity, with the first return air inlet and the second return air inlet facing each other.

[0008] As a further improvement of this utility model, the air duct assembly also includes an evaporator located in the cooling chamber, wherein the top ends of the first return air inlet and the second return air inlet are flush with or lower than the bottom end of the evaporator.

[0009] As a further improvement of this utility model, the main housing also includes a base plate connected to the bottom of the back plate, and the air duct assembly also includes a drain outlet located on the base plate. The distance between the drain outlet and the first side is greater than the distance between the drain outlet and the second side, and the dimension of the first return air outlet along the height direction is less than or equal to the dimension of the second return air outlet along the height direction.

[0010] As a further improvement of this utility model, the distance between the drain outlet and the second return air outlet is S1, where S1 ≥ 10 mm.

[0011] As a further improvement of this utility model, the base plate includes a first water guiding surface that extends obliquely downward from the bottom end of the first return air inlet to the drain outlet, and a second water guiding surface that extends obliquely downward from the bottom end of the second return air inlet to the drain outlet.

[0012] This utility model also provides an inner liner, including a first chamber, which is formed by the inner liner body and the above-mentioned air duct assembly. The main shell and the cover plate form a cooling cavity, and the side of the air duct assembly with the cover plate forms a storage cavity with the inner liner body. The cover plate is provided with a second air supply port and a third air return port that connect the cooling chamber and the storage chamber.

[0013] This utility model also provides a refrigeration device, including a second compartment and the aforementioned inner liner, wherein the main housing is located on the side of the first compartment facing the second compartment, and the first return air inlet and the second return air inlet are used to connect the cooling chamber and the second compartment.

[0014] The beneficial effects of this utility model are as follows: By distributing the first return air inlet and the second return air inlet on both sides of the main housing along the first direction, this utility model can firstly increase the return air volume; secondly, the air in the refrigeration room can flow into the air duct assembly along both sides of the first direction, thereby uniformly exchanging heat with the evaporator and improving the heat exchange efficiency; finally, it can extend the return air path and prevent frost or ice from forming at the connection between the refrigeration room and the first and second return air inlets due to low temperature. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the air duct assembly of this utility model; Figure 2 for Figure 1 A schematic diagram of the air duct assembly from another perspective; Figure 3 for Figure 1 An exploded view of the air duct assembly shown. Figure 4 for Figure 1 An exploded view of the air duct assembly shown. Figure 5 This is a schematic diagram of the main casing of this utility model; Figure 6 for Figure 1 Cross-sectional view along the AA direction; Figure 7 This is a schematic diagram of the air duct portion of this utility model; Figure 8 This is a schematic diagram of the connection between the air duct plate and the air supply plate of this utility model; Figure 9 This is a schematic diagram of the connection between the air duct plate and the air supply plate of this utility model; Figure 10 This is an exploded view of the air duct panel - air supply panel; Figure 11 for Figure 10 Cross-sectional view along the BB direction; Figure 12 for Figure 10 Cross-sectional view along the CC direction; Figure 13 This is a schematic diagram of the first room; Figure 14 This is a cross-sectional view of the first room; Figure 15 This is a schematic diagram of the main body of the inner liner of this utility model; Figure 16 This is a schematic diagram of the refrigeration equipment of this utility model; Figure 17 for Figure 16 An exploded view of the refrigeration equipment shown. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0020] like Figures 1 to 12 As shown, the air duct assembly 100 provided by this utility model includes a main housing 109, a cover plate 110 that cooperates with the main housing 109, and a cooling assembly located inside the main housing 109.

[0021] The main housing 109 has an internal accommodating space. The cover plate 110 is connected to the main housing 109 and encloses the accommodating space. The cooling assembly is located within the accommodating space. The cooling assembly includes an air duct plate 105, an evaporator chamber 106, a main air duct 101 located between the air duct plate 105 and the cover plate 110, an evaporator 107 located within the evaporator chamber 106, and a fan assembly 108 for guiding the cold airflow within the evaporator chamber 106 to the main air duct 101.

[0022] The air duct plate 105 has an air duct groove on the side facing the cover plate 110, and the air duct plate 105 and the cover plate 110 together form the main air duct 101. The main air duct 101 is located above the evaporator chamber 106. Under the driving action of the fan assembly 108, the cold air from the evaporator chamber 106 flows into the main air duct 101, and then flows into the corresponding refrigeration room through the main air duct 101. The fan assembly 108 includes a fan 108a located in the main air duct 101 and a fan volute 108b connected to the air duct plate 105.

[0023] The air duct assembly 100 further includes a first air supply port 114 and a compartment return air port located on the main housing 109. The first air supply port 114 is connected to the main air duct 101, and the compartment return air port is connected to the evaporator chamber 106. The first air supply port 114 and the compartment return air port are connected to the same refrigeration compartment, thereby realizing the refrigeration of the refrigeration compartment.

[0024] The cold air in the main air duct 101 is delivered to the cooling room through the first air outlet 114. The air in the cooling room flows into the evaporator chamber 106 through the chamber return air outlet and exchanges heat with the evaporator 107 to cool down. Then, it flows back into the main air duct 101 through the fan assembly 108, thereby realizing cyclic cooling.

[0025] The air duct assembly 100 further includes a second air supply outlet 115 and a third air return outlet 116 located on the cover plate 110. The second air supply outlet 115 is connected to the main air duct 101, and the third air return outlet 116 is connected to the evaporator chamber 106. The second air supply outlet 115 and the third air return outlet 116 are connected to the same refrigeration chamber, thereby realizing the refrigeration of the refrigeration chamber.

[0026] The cold air in the main air duct 101 is delivered to the cooling room through the second air outlet 115. The air in the cooling room flows into the evaporator chamber 106 through the third return air outlet 116 and exchanges heat with the evaporator 107 to cool down. Then, it flows back into the main air duct 101 through the fan assembly 108, thereby achieving cyclic cooling.

[0027] It should be noted that the first air supply outlet 114 and the compartment return air outlet, the second air supply outlet 115 and the third return air outlet 116 are respectively connected to two different refrigeration compartments, and the two refrigeration compartments are located on both sides of the air duct assembly 100.

[0028] Taking the first air supply outlet 114 and the compartment return air outlet as connecting to the refrigeration compartment, and the second air supply outlet 115 and the third return air outlet 116 as connecting to the freezer compartment as an example.

[0029] The main housing 109 has a first side and a second side arranged opposite to each other along a first direction, and the arrangement direction of the main housing 109 and the cover plate 110 is perpendicular to the first direction. The compartment return air vent includes a first return air vent 111 disposed on the first side of the main housing 109 and a second return air vent 112 disposed on the second side of the main housing 109.

[0030] It is understood that when the air duct assembly 100 supplies cooling to two compartments simultaneously, the main housing 109 faces the refrigeration compartment and the cover 110 faces the freezer compartment.

[0031] The first return air inlet 111 and the second return air inlet 112 are respectively located on both sides of the main casing 109 along the first direction. Firstly, this can increase the return air volume. Secondly, the air in the refrigerator compartment can flow into the evaporator chamber 106 along both sides of the first direction, thereby exchanging heat evenly with the evaporator 107 in the evaporator chamber 106 and improving the heat exchange efficiency. Finally, it can extend the return air path between the refrigerator compartment and the evaporator chamber 106, preventing frost or ice from forming at the connection between the refrigerator compartment and the first return air inlet 111 and the second return air inlet 112 due to the low temperature.

[0032] Specifically, the main housing 109 includes a first side plate 109c located on the first side, a second side plate 109d located on the second side, and a back plate 109a connecting the first side plate 109c and the second side plate 109d. The back plate 109a and the cover plate 110 are disposed opposite to each other. The first side plate 109c and the second side plate 109d extend from the back plate 109a toward the cover plate 110. The first return air vent 111 is located on the first side plate 109c, and the second return air vent 112 is located on the second side plate 109d.

[0033] It is understood that the back panel 109a faces the cold storage compartment, and the first side panel 109c and the second side panel 109d are located on the side of the main housing 109. By setting the first return air vent 111 on the first side panel 109c and the second return air vent 112 on the second side panel 109d, the return air path between the cold storage compartment and the evaporator chamber 106 can be extended.

[0034] The first air supply vent 114 is disposed on the back plate 109a, and the first return air vent 111 and the second return air vent 112 are located below the first air supply vent 114. This allows cold air to be delivered into the upper part of the cold storage compartment from the first air supply vent 114, and the cold air naturally sinks and flows back to the evaporator chamber 106 from the first return air vent 111 and the second return air vent 112, improving heat exchange efficiency. The first return air vent 111 and the second return air vent 112 are positioned opposite each other.

[0035] The main housing 109 also includes a base plate 109b connected to the bottom of the back plate 109a, and the air duct assembly 100 also includes a drain outlet 113 located on the base plate 109b, the drain outlet 113 being used to drain defrost water from the accommodating space.

[0036] The distance between the drain outlet 113 and the first side is greater than the distance between the drain outlet 113 and the second side, that is, the distance between the drain outlet 113 and the first return air inlet 111 is greater than the distance between the drain outlet 113 and the second return air inlet 112, and the dimension of the first return air inlet 111 along the height direction is less than or equal to the dimension of the second return air inlet 112 along the height direction.

[0037] When the drain outlet 113 is offset, the second return air outlet 112 is closer to the drain outlet 113 than the first return air outlet 111. Based on this, the size of the second return air outlet 112 along the height direction can be adaptively increased, thereby increasing the return air volume of the second return air outlet 112.

[0038] The distance between the bottom end of the first return air inlet 111 and the drain outlet 113 along the height direction is greater than the distance between the bottom end of the second return air inlet 112 and the drain outlet 113 along the height direction. That is, the bottom end of the first return air inlet 111 is higher than the bottom end of the second return air inlet 112. By reducing the height of the bottom end of the second return air inlet 112, the dimension of the second return air inlet 112 along the height direction is made larger than the dimension of the first return air inlet 111 along the height direction.

[0039] To ensure that defrost water flows towards the drain outlet 113, water guide surfaces need to be provided between the first return air inlet 111 and the drain outlet 113, and between the second return air inlet 112 and the drain outlet 113, and these water guide surfaces need to maintain a certain inclination angle. The second return air inlet 112 is closer to the drain outlet 113 than the first return air inlet 111. Furthermore, even if the bottom of the second return air inlet 112 is lower than the bottom of the first return air inlet 111, the requirements for the water guide surface can still be met. In this way, the return air volume of the second return air inlet 112 can be increased without affecting the flow of defrost water towards the drain outlet 113.

[0040] The distance between the drain outlet 113 and the second return air inlet 112 is S1, where S1 ≥ 10 mm. When the drain outlet 113 is offset, a certain distance needs to be maintained between the drain outlet 113 and the second return air inlet 112 to prevent the return air from the second return air inlet 112 from flowing out of the drain outlet 113, causing a loss of cooling capacity; at the same time, it can also reduce the risk of the drain outlet 112 freezing and clogging.

[0041] The tops of the first return air inlet 111 and the second return air inlet 112 are flush with or lower than the bottom of the evaporator 107. In this way, the airflow flowing into the evaporator chamber 106 from the first return air inlet 111 and the second return air inlet 112 will not be blocked by the evaporator 107.

[0042] When the tops of the first return air inlet 111 and the second return air inlet 112 are flush with the bottom of the evaporator 107, the return air volume of the first return air inlet 111 and the second return air inlet 112 is maximized. When the tops of the first return air inlet 111 and the second return air inlet 112 are lower than the bottom of the evaporator 107, the probability of frost or ice formation on the first return air inlet 111 and the second return air inlet 112 can be reduced.

[0043] The base plate 109b includes a first guide surface 109b-1 extending downwards at an angle from the bottom of the first return air inlet 111 to the drain outlet 113, and a second guide surface 109b-2 extending downwards at an angle from the bottom of the second return air inlet 112 to the drain outlet 113. Defrosting water in the area of ​​the drain outlet 113 facing the first return air inlet 111 flows towards the drain outlet 113 via the first guide surface 109b-1; defrosting water in the area of ​​the drain outlet 113 facing the second return air inlet 112 flows towards the drain outlet 113 via the second guide surface 109b-2.

[0044] The air duct assembly 100 also includes a heating element 117 located between the evaporator 107 and the base plate 109b. The heating element 117 is used to prevent frost or ice from forming at the first return air inlet 111, the second return air inlet 112 and the drain outlet 113, which could cause blockage.

[0045] The air duct assembly 100 further includes a first air duct 103 and an air supply plate 102 connected to the side of the air duct plate 105 facing away from the main air duct 101. The air supply plate 102 is provided with an air inlet 102a that communicates with the first air outlet 114. The first air duct 103 extends along the arrangement direction of the air duct plate 105 and the air supply plate 102 to connect the main air duct 101 and the air inlet 102a.

[0046] The air supply plate 102 is located between the air duct plate 105 and the main housing 109. The first air duct 103 is connected to the main air duct 101 at one end, which is the first air outlet 103b. The end of the first air duct 103 away from the main air duct 101 is connected to the air inlet 102a. The cold air in the main air duct 101 flows through the first air duct 103 to the air inlet 102a, and then through the air inlet 102a to the first air supply port 114.

[0047] The first air duct 103 has a first guide surface 103a disposed at its bottom, and the height of the first guide surface 103a gradually decreases from the air inlet 102a to the main air duct 101.

[0048] Thus, when defrosting water is generated in the first air duct 103, the defrosting water can flow to the main air duct 101 through the first guide surface 103a, thereby preventing defrosting water from remaining in the first air duct 103 and causing bacteria or odors.

[0049] The first guide surface 103a can be a part of the bottom wall of the first air duct 103, or it can be a guide structure disposed on the bottom wall of the first air duct 103.

[0050] The first air duct 103 is a through hole 105a that penetrates the air duct plate 105 along the arrangement direction of the air duct plate 105 and the air supply plate 102, and the air inlet 102a is directly opposite the through hole 105a. From the air inlet 102a to the main air duct 101, the bottom wall height of the through hole 105a gradually decreases to form the first guide surface 103a.

[0051] Under the action of the main housing 109, the air supply plate 102 is attached to the side of the air duct plate 105 facing away from the main air duct 101. The cold air in the main air duct 101 flows to the air inlet 102a through the first air duct 103, and then flows to the cold storage compartment through the air inlet 102a.

[0052] From the air inlet 102a to the main air duct 101, the bottom wall of the through hole 105a is inclined downward, and the defrosting water in the first air duct 103 flows along the bottom wall of the through hole 105a into the main air duct 101.

[0053] It should be noted that the area of ​​the first air outlet 103b is smaller than the area of ​​the second air outlet 115, so that the air volume delivered by the second air outlet 115 is greater than the air volume delivered by the first air outlet 103b, thus allowing more cold air in the main air duct 101 to be delivered into the freezer room through the second air outlet 115.

[0054] The air supply plate 102 is also provided with a second air outlet 102c, which is connected to the first air supply outlet 114. The air inlet 102a is located on the side of the air supply plate 102 facing the air duct plate 105, and the second air outlet 102c is located on the side of the air supply plate 102 facing the main housing 109, coinciding with the first air supply outlet 114. The air duct assembly 100 also includes a second air duct 118 connecting the air inlet 102a and the second air outlet 102c.

[0055] By adding the second air outlet 102c and the second air duct 118, the cold air flow path from the main air duct 101 to the second air outlet 102c can be extended, and the distance between the second air outlet 102c and the evaporator chamber 106 can be increased, thereby preventing the air outlet temperature of the second air outlet 102c from being too low, which would lead to the temperature inside the cold storage room being too low and frost forming at the second air outlet 102c.

[0056] A first heating element 500 is also provided at the second air outlet 102c. The first heating element 500 is used to heat the cold air delivered from the second air outlet 102c to the refrigerator compartment, thereby increasing the temperature of the cold air entering the refrigerator compartment and preventing the temperature inside the refrigerator compartment from becoming too low. At the same time, by providing the first heating element 500 at the second air outlet 102c, it is also possible to prevent the air temperature at the second air outlet 102c from becoming too low, thus preventing excessive temperature difference between the air outlet 102c and the refrigerator compartment from causing frost to form on the second air outlet 102c.

[0057] The first heating element 500 is arranged around the second air outlet 102c, thereby improving the heating efficiency of the cold air at the second air outlet 102c and realizing the overall heating of the cold air at the second air outlet 102c.

[0058] The first heating element 500 is disposed outside the second air outlet 102c. In this way, the first heating element 500 can be prevented from affecting the air outlet of the second air outlet 102c, and the first heating element 500 will not obstruct the air outlet of the second air outlet 102c.

[0059] Specifically, the air supply plate 102 is provided with a first mounting groove 102d, and the first heating element 500 is located in the first mounting groove 102d. The first mounting groove 102d is located on the side of the air supply plate 102 facing the main housing 109, and the first mounting groove 102d surrounds the second air outlet 102c. By providing the first mounting groove 102d, the installation of the first heating element 500 is facilitated; at the same time, by embedding the first heating element 500 in the first mounting groove 102d, the first heating element 500 will not interfere with the assembly of the air supply plate 102 and the main housing 109.

[0060] The air supply plate 102 is provided with a plurality of second air outlets 102c, and a first heating element 500 is provided at each of the second air outlets 102c. By providing a plurality of second air outlets 102c, the temperature uniformity inside the cold storage room can be improved.

[0061] The extension direction of the second air duct 118 intersects the arrangement direction of the air supply plate 102 and the air duct plate 105, and the air inlet 102a and the second air outlet 102c are arranged at intervals along the extension direction of the second air duct 118.

[0062] Specifically, the second air duct 118 extends along the extension direction of the air supply plate 102, thereby further extending the length of the second air duct 118, thereby extending the cold air flow path from the main air duct 101 to the second air outlet 102c, thereby preventing the air outlet temperature of the second air outlet 102c from being too low.

[0063] The first heating element 500 includes a first heating section 501 disposed in the first mounting groove 102d and a second heating section 502 disposed along the second air duct 118.

[0064] Thus, as the cold air flows from the air inlet 102a to the second air outlet 102c through the second air duct 118, the cold air can also be heated by the second heating section 502 set along the second air duct 118, thereby further increasing the air supply temperature of the second air outlet 102c and preventing the temperature in the cold storage room from being too low or frost from forming at the second air outlet 102c.

[0065] The second heating section 502 is also located outside the second air duct 118, thereby preventing the second heating section 502 from obstructing the flow of cold air in the second air duct 118.

[0066] The air supply plate 102 further includes a second mounting groove 102e disposed along the second air duct 118, and the second heating section 502 is located within the second mounting groove 102e. The second mounting groove 102e is disposed on the side of the air supply plate 102 facing the main housing 109, and the second mounting groove 102e is disposed along the second air duct 118. By providing the second mounting groove 102e, the installation of the second heating section 502 is facilitated; at the same time, by embedding the second heating section 502 into the second mounting groove 102e, the second heating section 502 will not interfere with the assembly of the air supply plate 102 and the main housing 109.

[0067] The second mounting slot 102e is located above and / or below the second air duct 118. The specific location depends on the space available on the air supply plate 102.

[0068] In one specific embodiment, the air supply plate 102 is provided with two second air outlets 102c, which are respectively located on both sides of the extension direction of the second air duct 118, and the air inlet 102a is located between the two second air outlets 102c. Correspondingly, the extension portion 109c is provided with two first air supply ports 114.

[0069] Similarly, in order to improve the temperature uniformity in the cold storage room, second air outlets 102c are respectively provided on both sides of the extension direction of the second air duct 118. The cold air from the air inlet 102a flows through the second air duct 118 to the second air outlets 102c on both sides and is finally delivered to the cold storage room.

[0070] The second air duct 118 connects to the second air outlets 102c on both sides. Based on this, the second mounting groove 102e can be connected to the first mounting grooves 102d on both sides, and the first heating section 501 and the second heating section 502 can be connected, which facilitates the overall installation and control of the first heating element 500.

[0071] The area of ​​the air inlet 102a is smaller than the area of ​​the second air outlet 102c. This reduces the airflow velocity at the second air outlet 102c, improving the heating effect of the first heating section 501 on the cold air at the second air outlet 102c. Simultaneously, by increasing the area of ​​the second air outlet 102c, the temperature uniformity within the cold storage room can be improved.

[0072] The second air duct 118 is formed by the air duct plate 105, the air supply plate 102 and the main housing 109, thereby facilitating the formation of the second air duct 118.

[0073] The two second air outlets 102c are respectively disposed on both sides of the extension direction of the second air duct 118. The second air duct 118 includes air supply chambers 118a located on both sides of its extension direction and air supply channels 118b extending from the air inlet 102a to the air supply chambers 118a. The second air outlets 102c are connected to the air supply chambers 118a.

[0074] The cold air in the main air duct 101 flows through the first air duct 103 to the air inlet 102a, then through the air supply duct 118b to the air supply cavity 118a, and finally through the second air outlet 102c into the cold storage room. The cold air flowing into the air supply cavity 118a through the air supply duct 118b diffuses within the air supply cavity 118a, thereby reducing the cold air flow rate and ensuring that the cold air can be evenly delivered to the cold storage room through the second air outlet 102c.

[0075] From the air inlet 102a to the air supply cavity 118a, the area of ​​the air supply channel 118b gradually increases. This reduces the airflow velocity, prolongs the airflow time within the air supply channel 118b, lowers the air temperature, and facilitates the uniform diffusion of cold air from the air supply channel 118b into the air supply cavity 118a.

[0076] The air duct plate 105 is provided with two first air outlets 103b at intervals, and correspondingly, the air duct plate 10 is provided with two air inlets 102a. The first air outlets 103b and the air inlets 102a correspond one-to-one and are connected through the first air duct 103.

[0077] The air inlet 102a corresponds one-to-one with the air supply cavity 118a. The air inlet 102a corresponds to the adjacent air supply cavity 118a. The air inlet 102a is connected to the corresponding air supply cavity 118a through the air supply channel 118b.

[0078] From the air inlet 102a to the air supply cavity 118a, the air supply channel 118b includes an air inlet section 118b-4 and a connecting section 118b-3 connected in sequence, and the area of ​​the connecting section 118b-3 is larger than the area of ​​the air inlet section 118b-4.

[0079] The cold air entering through the air inlet 102a first flows through the air inlet section 118b-4 to the connecting section 118b-3. Since the area of ​​the connecting section 118b-3 is larger than that of the air inlet section 118b-4, the cold air diffusion velocity is slowed, thus facilitating the heating of the cold air by the second heating section 502 arranged along the second air duct 118. The cold air then diffuses evenly into the air supply cavity 118a through the large-area connecting section 118b-3.

[0080] From the air inlet section 118b-4 to the air outlet cavity 118a, the connecting section 118b-3 extends obliquely away from the side where the second air outlet 102c is located. The obliquely arranged connecting section 118b-3 extends the air delivery path of the air outlet 118b, increases the air resistance of the cold air flowing through the air outlet 118b, thereby reducing the air velocity and prolonging the flow time of the cold air in the air outlet 118b. This facilitates the heating of the cold air by the second heating section 502 arranged along the second air duct 118, thereby increasing the outlet temperature of the second air outlet 102c and preventing the temperature inside the cold storage room from becoming too low.

[0081] The second air duct 118 includes an intermediate section 118c connecting the two air inlet sections 118b-4, i.e., the intermediate section 118c connects the two air inlet sections 118b-4, i.e., the intermediate section 118c connects the two air inlets 102a. By setting the intermediate section 118c, the diffusion area after entering the second air duct 118 from the air inlets 102a is increased, which is equivalent to increasing the heating area of ​​the second heating section 502, which is beneficial to further improve the outlet air temperature of the second air outlet 102c. The cold air entering from one of the air inlets 102a can flow to the corresponding air supply cavity 118a and also flow to the other air inlet 102a.

[0082] From one of the air inlets 102a to the other, the area of ​​the intermediate section 118c first decreases and then increases.

[0083] Specifically, the air supply plate 102 has a recessed portion 102f on the side facing the main housing 109, and the recessed portion 102f is directly opposite the two air inlets 102a. The main housing 109 has a protrusion that matches the recessed portion 102f. The protrusion is located inside the recessed portion 102f. By providing the recessed portion 102f and the protrusion, the assembly of the air supply plate 102 and the main housing 109 can be positioned, and the intermediate section 118c can be formed.

[0084] The area of ​​the middle section 118c first decreases and then increases, thereby avoiding excessive cross-flow of cold air between the two air inlets 102a, ensuring that more of the cold air entering from the air inlet 102a flows into the corresponding air supply cavity 118a, so that the air volume of the two second air outlets 102c is approximately the same, and improving the temperature uniformity in the second chamber 200.

[0085] In the extending direction of the second air duct 118, from the air inlet 102a to the second air outlet 102c, the bottom wall of the second air duct 118 gradually decreases.

[0086] In this way, the condensate and defrost water in the second air duct 118 will converge and flow to the second air outlet 102c through the bottom wall of the second air duct 118, and then flow directly into the cold storage room through the second air outlet 102c; or when the second air outlet 102c is venting, the moisture at the second air outlet 102c will be carried into the cold storage room by the cold air, thereby increasing the humidity in the cold storage room and preventing the food in the cold storage room from drying out.

[0087] Specifically, from the air inlet 102a to the air supply cavity 118a, the bottom wall of the air supply channel 118b gradually decreases, so that the condensate and defrost water in the air supply channel 118b flow into the air supply cavity 118a.

[0088] The bottom wall of the air supply cavity 118a gradually rises in the direction away from the second air outlet 102c. Thus, when condensate and defrost water from the air supply channel 118b flow into the air supply cavity 118a, they converge along the bottom wall of the air supply cavity 118a at the location of the second air outlet 102c.

[0089] The height of the highest point of the bottom wall of the air supply channel 118b is greater than the height of the bottom wall of the intermediate section 118c, and a step portion 118d is formed at the connection position of the air supply channel 118b and the intermediate section 118c.

[0090] It is understood that the stepped portion 118d serves as a water-blocking portion, and the condensate and defrost water in the middle section 118c will not flow into the air supply cavity 118a through the air supply channel 118b, but will flow to the main air channel 101 through the first air channel 103, thereby preventing excessive condensate and defrost water from flowing into the cold storage room.

[0091] The stepped portion 118d is located on the side of the air inlet 102a facing the corresponding air supply channel 118b. On the one hand, the stepped portion 118d can block and slow down the flow rate of cold air from the air inlet 102a to the air supply channel 118b; on the other hand, the position of the stepped portion 118d can divert condensate and defrost water, preventing condensate and defrost water that should flow to the main air duct 101 via the first air duct 103 from flowing to the second air outlet 102c.

[0092] The length of the intermediate section 118c is greater than or equal to the length of the air supply duct 118b. First, ensure that there is sufficient distance between the two air inlets 102a to prevent turbulence from causing poor airflow; second, ensure that most of the condensate and defrost water in the second air duct 118 flows to the main air duct 101 via the first air duct 103.

[0093] To ensure that the condensate and defrost water in the intermediate section 118c flows towards the air inlet 102a and to prevent condensate and defrost water from remaining in the intermediate section 118c, the bottom wall of the intermediate section 118c first increases and then decreases from one air inlet 102a to the other, allowing the condensate and defrost water in the intermediate section 118c to flow towards the air inlets 102a on both sides.

[0094] Alternatively, starting from the side where the air inlet 102a is located and moving away from the air inlet 102a, the bottom wall of the intermediate section 118c gradually rises, and from the midpoint between the two air inlets 102a to either air inlet 102a, the side wall of the intermediate section 118c closest to the air inlet 102a extends towards the air inlet 102a. This also allows the condensate and defrost water within the intermediate section 118c to flow towards the air inlet 102a.

[0095] It is understood that, due to the arrangement of the air supply plate 102, the thickness of the air duct assembly 100 increases at the location where the air supply plate 102 is located. Therefore, the back plate 109a includes a main body 109a-2 and an extension 109a-1. The dimension of the extension 109a-1 along the thickness direction of the air duct assembly 100 is larger than the dimension of the main body 109a-2 along the thickness direction of the air duct assembly 100. The air supply plate 102 is located within the extension 109a-1, and the first air outlet 114 is located within the extension 109a-1.

[0096] This utility model also provides an inner liner, which is formed by splicing an air duct assembly 100 and an inner liner body 200.

[0097] An opening 201 is provided on the inner liner body 200, and the air duct assembly 100 is connected to the opening 201 of the inner liner body 200. The air duct assembly 100 closes the opening 201 and encloses the inner liner body 200 to form a first compartment 300.

[0098] The first compartment 300 includes a cooling chamber 301 and a storage chamber 302. A receiving space is formed within the main housing 109, and the cover plate 110 encloses the receiving space to form the cooling chamber 301. That is, the main housing 109 and the cover plate 110 enclose the cooling chamber 301, and the cooling assembly is located within the cooling chamber 301. The air duct assembly 100, with one side of the cover plate 110, encloses the inner liner body 200 to form the storage chamber 302.

[0099] It is understood that the second air outlet 115 located on the cover plate 110 connects the main air duct 101 and the storage cavity 302, and the third return air outlet 116 located on the cover plate 110 connects the evaporator chamber 106 and the storage cavity 302. The cold air in the main air duct 101 is delivered to the storage cavity 302 via the second air outlet 115, and the air in the storage cavity 302 flows into the evaporator chamber 106 via the third return air outlet 116, where it exchanges heat with the evaporator 107 and is cooled. Then, it flows back into the main air duct 101 through the fan assembly 108, thereby achieving cyclic cooling.

[0100] When the second air supply port 115 and the third air return port 116 are provided on the cover plate 110, the air supply path and the air return path are short, and there is no need to add an additional air duct to connect the storage cavity 302 and the main air duct 101 or the evaporator chamber 106.

[0101] However, the second air supply port 115 and the third air return port 116 are located far from the end of the storage cavity 302 away from the cover plate 110, which may cause uneven temperature distribution within the storage cavity 302. To address this, an air duct can be added to the storage cavity 302 and connected to the second air supply port 115 or the third air return port 116. This air duct can extend to the end of the storage cavity 302 away from the cover plate 110. Alternatively, the second air supply port 115 or the third air return port 116 can be mounted on the main housing 109, and a through hole can be formed in the storage cavity 302. An external air duct can connect the through hole to the second air supply port 115 or the third air return port 116 for air supply or return. The position of this through hole can be adjusted to accommodate the temperature variations within the storage cavity 302.

[0102] This utility model also provides a refrigeration device, which can be a freezer or refrigerator, etc. Taking a freezer as an example, the freezer includes the aforementioned inner liner and a second compartment 400. The first compartment 300 and the second compartment 400 are arranged adjacent to each other, and the air duct assembly 100 is located on the side of the first compartment 300 facing the second compartment 400.

[0103] The air duct assembly 100 and the inner liner body 200 enclose a first compartment 300, the first compartment 300 including a cooling chamber 301 and a storage chamber 302, the cooling chamber 301 being located between the storage chamber 302 and the first compartment 300.

[0104] Taking the first compartment 300 as a freezer compartment and the second compartment 400 as a refrigerator compartment as an example. The second compartment 400 includes a first refrigerator side wall 402, a refrigerator air inlet 401, and a refrigerator return air inlet 403, which are arranged adjacent to the air duct assembly 100. The refrigerator air inlet 401 is connected to the first air supply outlet 114, and the refrigerator return air inlet 403 is connected to the first return air inlet 111 and the second return air inlet 112.

[0105] The refrigerated air inlet 401 is located on the first refrigerated side wall 402, the extension 109a-1 is attached to the first refrigerated side wall 402, and the first air outlet 114 is joined to the refrigerated air inlet 401. The main body 109a-2 is spaced apart from the first refrigerated side wall 402 to prevent the cold air in the evaporator chamber 106 from being conducted to the second compartment 400.

[0106] Thus, by attaching the extension 109a-1 to the first refrigerated sidewall 402, the cold air in the main air duct 101 can be supplied to the second compartment 400, thereby eliminating the need for additional air ducts.

[0107] The refrigeration equipment also includes an external air duct 600 connecting the refrigerated return air inlet 403 with the first return air inlet 111 and the second return air inlet 112. The external air duct 600 is located outside the air duct assembly 100. Air in the second compartment 400 flows into the evaporator chamber 106 via the external air duct 600.

[0108] It is understood that the back panel 109a is directly opposite the first refrigeration side wall 402. By setting the first return air vent 111 on the first side panel 109c and the second return air vent 112 on the second side panel 109d, the distance between the refrigeration return air vent 403 and the first return air vent 111 and the second return air vent 112 can be increased, thereby extending the path of the external air duct 600. This prevents the refrigeration return air vent 403 from being too close to the evaporator cavity 106, which would result in a low temperature and cause frost or ice formation.

[0109] The refrigerated return air vent 403 can be disposed on the second refrigerated side wall 404, which is located on both sides of the first refrigerated side wall 402. This facilitates the installation of the external air duct 600, and the refrigerated return air vents 403 on both sides of the first refrigerated side wall 402 are respectively connected to the first return air vent 111 and the second return air vent 112 via the external air duct 600, increasing the return air volume and improving the temperature uniformity within the second compartment 400. Of course, in other embodiments, the first return air vent 111 and the second return air vent 112 can also be disposed on the first refrigerated side wall 402.

[0110] In summary, by distributing the first return air inlet 111 and the second return air inlet 112 on both sides of the main housing 109 along the first direction, this utility model firstly increases the return air volume; secondly, the air in the refrigeration room can flow into the evaporator chamber 106 along both sides of the first direction, thereby uniformly exchanging heat with the evaporator 107 in the evaporator chamber 106 and improving the heat exchange efficiency; finally, it can extend the return air path between the refrigeration room and the evaporator chamber 106, preventing frost or ice formation at the connection points between the refrigeration room and the first return air inlet 111 and the second return air inlet 112 due to low temperature.

[0111] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0112] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. An air duct assembly (100) characterized by, include: The main housing (109) has a first side and a second side disposed opposite to each other along a first direction; A cover plate (110) that cooperates with the main housing (109) is arranged in a direction perpendicular to the first direction. The first return air vent (111) is located on the first side of the main housing (109); The second return air vent (112) is located on the second side of the main housing (109).

2. The air duct assembly (100) of claim 1, characterized in that: The main housing (109) includes a first side plate (109c) located on a first side, a second side plate (109d) located on a second side, and a back plate (109a) connected between the first side plate (109c) and the second side plate (109d). The back plate (109a) and the cover plate (110) are disposed opposite to each other. The first return air vent (111) is located on the first side plate (109c), and the second return air vent (112) is located on the second side plate (109d).

3. The air duct assembly (100) of claim 2, characterized in that: It also includes a first air supply vent (114) located on the back panel (109a), and a first return air vent (111) and a second return air vent (112) located below the first air supply vent (114).

4. The air duct assembly (100) of claim 1, wherein: The main housing (109) and the cover plate (110) surround to form a cooling chamber (301). The first return air inlet (111) and the second return air inlet (112) are connected to the cooling chamber (301), and the first return air inlet (111) and the second return air inlet (112) are facing each other.

5. The air duct assembly (100) according to claim 4, characterized in that: The air duct assembly (100) also includes an evaporator (107) located in the cooling chamber (301), wherein the tops of the first return air inlet (111) and the second return air inlet (112) are flush with or lower than the bottom of the evaporator (107).

6. The air duct assembly (100) of claim 2, wherein: The main housing (109) also includes a base plate (109b) connected to the bottom of the back plate (109a), and the air duct assembly (100) also includes a drain outlet (113) located on the base plate (109b). The distance between the drain outlet (113) and the first side is greater than the distance between the drain outlet (113) and the second side. The dimension of the first return air outlet (111) along the height direction is less than or equal to the dimension of the second return air outlet (112) along the height direction.

7. The air duct assembly (100) of claim 6, characterized in that: The distance between the drain outlet (113) and the second return air outlet (112) is S1, where S1 ≥ 10 mm.

8. The air duct assembly (100) of claim 6, characterized in that: The base plate (109b) includes a first water guide surface (109b-1) extending downward from the bottom end of the first return air inlet (111) to the drain outlet (113) and a second water guide surface (109b-2) extending downward from the bottom end of the second return air inlet (112) to the drain outlet (113).

9. A liner characterized by: It includes a first compartment (300), which is formed by an inner liner body (200) and an air duct assembly (100) as described in any one of claims 1 to 8. The main shell (109) and the cover plate (110) are arranged to form a cooling cavity (301). The side of the air duct assembly (100) with the cover plate (110) is arranged with the inner liner body (200) to form a storage cavity (302). The cover plate (110) is provided with a second air supply port (115) and a third air return port (116) that connect the cooling chamber (301) and the storage chamber (302).

10. A refrigeration appliance characterized by: Includes a second compartment (400), an inner liner as described in claim 9, the main shell (109) being located on the side of the first compartment (300) facing the second compartment (400), and the first return air vent (111) and the second return air vent (112) being used to connect the cooling chamber (301) and the second compartment (400).

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