Air door device and refrigerator

Abstract

The utility model relates to an air door device and a refrigerator, the air door device comprises a shell, a cross flow fan, an upper air deflector and a lower air deflector, the shell is provided with an air inlet and an air outlet; the cross flow fan is close to the air inlet and is arranged in the shell; the upper air guide plate and the lower air guide plate are both arranged in the shell and jointly define an air door air duct so as to communicate the cross flow fan with the air outlet; the upper ends of the upper and lower air deflectors are arranged on the front and rear sides of the cross-flow fan respectively, the lower ends of the upper and lower air deflectors are connected with the air outlets respectively, and the air door air duct extends in the direction from the cross-flow fan to the air outlets. The air door device is installed on the top of any refrigerating or freezing equipment such as a refrigerator, when the box door is opened, a three-dimensional air door is formed at the opening of the box body, cold and hot air exchange inside and outside the box body can be effectively separated, energy loss and internal frosting are reduced, and the service life of the refrigerating equipment is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and in particular relates to a damper device and a refrigerator. Background Art

[0002] An ultra-low temperature freezer is a special type of freezing equipment that can store high-value substances such as biological samples and drugs at very low temperatures, usually -80°C or lower.

[0003] During the use of ultra-low temperature refrigerators, due to the large temperature difference between the inside and outside of the refrigerator, a large amount of cold air will overflow from the interior when the door is opened, and the hot air outside will quickly enter the freezer. On the one hand, the water vapor contained in this hot air will cause a large amount of cold air to be lost in the freezer, affecting the temperature uniformity and temperature fluctuation inside the refrigerator. On the other hand, the water vapor contained in the hot air will condense at low temperatures, causing water vapor to condense on the outer surface of the freezer wall shell and the inner door shell, forming a frost layer, and eventually leading to ice. This not only increases power consumption, but the long-term accumulation of ice will also cause cold leakage, seriously affecting the normal use of the refrigerator, and requiring regular manual defrosting. In addition, when the door is opened, the interior of the refrigerator is directly connected to the external environment, and dust, bacteria, etc. can enter the freezer, causing stored products to contaminate. Utility Model Content

[0004] The purpose of the utility model is to solve one of the above technical problems and provide a damper device and a refrigerator. The damper device is installed on the top of the refrigerator. The damper device is controlled by the mechanical action of opening and closing the refrigerator door, so that when the door is opened, the damper device forms a three-dimensional damper at the opening of the box body, effectively isolating the exchange of cold and hot air inside and outside the box body, reducing energy loss and internal frost, reducing energy consumption, and increasing the service life of the refrigerator.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A damper device, characterized by comprising:

[0007] The shell has an air inlet on the top and an air outlet on the bottom;

[0008] The cross-flow fan is arranged inside the housing, on one side close to the air inlet; the cross-flow fan includes a front air guide plate, a rear air guide plate and a fan body; the front air guide plate and the rear air guide plate are respectively arranged on the front and rear sides of the fan body;

[0009] The upper air guide plate and the lower air guide plate are both arranged inside the shell, and the lower air guide plate is located on the lower side of the upper air guide plate, defining an air outlet duct between the lower air guide plate and the upper air guide plate;

[0010] The upper end of the upper air guide plate and the upper end of the lower air guide plate are respectively connected to the front air guide plate and the rear air guide plate, the lower end of the upper air guide plate and the lower end of the lower air guide plate are respectively connected to the air outlet, and the air door duct is extended in the direction from the cross flow fan to the air outlet.

[0011] In some embodiments of the present invention, the cross-flow fans include two, and the two cross-flow fans are arranged in an array in the housing;

[0012] An air partition is provided between the two cross flow fans. One end of the air partition is located between the two cross flow fans and is used to separate the two cross flow fans. The other end extends into the damper duct to separate the damper duct into two symmetrical and relatively independent sub-ducts.

[0013] In some embodiments of the present invention, a plurality of air guides are provided in the air door duct, and the plurality of air guides are provided along the extension direction of the air door duct to divide the air door duct into a plurality of relatively independent sub-ducts.

[0014] In some embodiments of the present invention, the widths of the multiple relatively independent sub-air ducts gradually decrease from both sides to the middle.

[0015] In some embodiments of the present invention, the upper air guide plate and the lower air guide plate each include a first air guide section and a second air guide section;

[0016] The first air guide section of the upper air guide plate and the first air guide section of the lower air guide plate are connected to the front air guide plate and the rear air guide plate respectively;

[0017] The second air guide section of the upper air guide plate and the second air guide section of the lower air guide plate are respectively connected to the air outlet and are both vertically arranged to jointly define a vertical air door duct;

[0018] The junction between the first air guide section and the second air guide section of the upper air guide plate protrudes in a direction away from the lower air guide plate, forming an expansion cavity in the air door duct.

[0019] In some embodiments of the present invention, the upper air guide plate, the lower air guide plate and the shell are an integrated structure.

[0020] In some embodiments of the present invention, a protrusion protruding toward the outside of the shell is provided on the shell, a fan accommodating cavity for accommodating the cross-flow fan is formed inside the protrusion, and the air inlet is provided on the protrusion.

[0021] In some embodiments of the present invention, an LED light strip is provided on the outside of the air outlet along the extension direction of the air outlet. The LED light strip is electrically connected to the cross flow fan and is switched on and off synchronously with the cross flow fan.

[0022] Some embodiments of the present invention further provide a refrigerator, comprising:

[0023] The box body has an opening on its front side;

[0024] A box door, which is installed on the box body and is used to open and close the opening;

[0025] The air door device is installed on the top of the box body, close to one side of the opening, and is used to form an air door at the opening of the box body.

[0026] In some embodiments of the present invention, the present invention further comprises:

[0027] The freezer compartment is arranged inside the box body and is surrounded by a freezer liner. A freezer interior door is installed on the front side for opening and closing the freezer compartment.

[0028] In some embodiments of the present invention, the invention further comprises a fixing bracket;

[0029] The fixing bracket is set between the damper device and the box body. It includes two L-shaped support brackets arranged opposite to each other, and the L-shaped support brackets include a horizontal mounting plate and a vertical mounting plate perpendicular to each other;

[0030] The vertical mounting plates of the two L-shaped support frames are respectively clamped on the two side surfaces in the width direction of the box body. The horizontal mounting plates of the two L-shaped support frames are both provided with strip holes, and are telescopically connected through the strip holes.

[0031] The beneficial effects of the present invention are:

[0032] 1. The damper device provided by the present invention is provided with at least one DC cross-flow fan, which has the characteristics of low noise and uniform air output, making the damper device simple in overall structure, small in size and light in weight;

[0033] 2. The damper device provided by the utility model is provided with an air baffle and an air guide in the air duct, which can balance the difference in air flow distribution in the air duct, reasonably utilize the space in the air duct, and has low noise and uniform air output;

[0034] 3. The utility model sets an expansion cavity in the air door duct, which is conducive to guiding the airflow to turn and better guide the airflow to blow vertically downward;

[0035] 4. The utility model sets an LED light strip at the air outlet to present the status and appearance of the three-dimensional air door, forming good usage feedback.

[0036] 5. The utility model is installed on the top of the refrigerator body, and the damper device is linked to the mechanical switch of the refrigerator door through a fan-shaped switch. That is, when the outer door is closed, the circuit is disconnected, and when the outer door is opened, the circuit is closed and connected. This effectively simplifies the control method of the damper device, so that the fan automatically opens when the door is opened to form a three-dimensional damper.

[0037] 6. The three-dimensional air door formed when the utility model is opened can effectively separate the exchange of hot and cold air inside and outside the box, reducing energy loss and internal frost, lowering energy consumption, and extending the service life of the refrigerator. At the same time, it can also reduce the entry of dust and bacteria, ensuring the more stringent storage environment requirements of specific products. In addition, the three-dimensional air door can accelerate the melting and volatilization of frost on the outer wall of the freezer door, avoiding regular manual defrosting and reducing the maintenance cost of the refrigerator.

[0038] 7. The retractable fixing bracket provided by the present invention enables the damper device and the refrigerator to form a stable structure, and is compatible with multiple refrigerator specifications and models. There are shock-absorbing cushions at the connection, which not only reduces noise but also extends service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 It is a side perspective structural diagram of the damper device;

[0041] Figure 2 Schematic diagram of the bottom structure of the damper device;

[0042] Figure 3 This is a schematic diagram of the top structure when two cross-flow fans are installed in the damper device;

[0043] Figure 4 This is a schematic diagram of the air duct division when two cross-flow fans are installed in the damper device;

[0044] Figure 5 This is a schematic diagram of the top structure when a cross-flow fan is installed in the damper device;

[0045] Figure 6 This is a schematic diagram of the air duct division when a cross-flow fan is installed in the damper device;

[0046] Figure 7 This is a structural diagram of the refrigerator in the open door state;

[0047] Figure 8 This is a structural diagram of the refrigerator in the closed state;

[0048] Figure 9 This is a schematic diagram of the bottom structure when the fixed bracket is shortened to its shortest state;

[0049] Figure 10 This is a schematic diagram of the front structure when the fixing bracket is shortened to its shortest state;

[0050] Figure 11 This is a schematic diagram of the bottom structure when the fixed bracket is extended to its longest state;

[0051] Figure 12 This is a schematic diagram of the front structure of the fixed bracket when it is extended to its longest state;

[0052] Wherein, the accompanying drawings are marked as follows:

[0053] 1. Box body;

[0054] 2. Box door; 21. External door handle;

[0055] 3. Damper device; 31. Housing; 311. Air inlet; 312. Air outlet; 32. Crossflow fan; 33. Mechanical switch; 34. Damper duct; 341. Expansion chamber; 35. Upper air guide plate; 36. Lower air guide plate; 37. Air baffle; 38. Air guide member in the duct;

[0056] 4. Fixing bracket; 41. L-shaped support bracket; 42. Round head bolt; 43. First shock-absorbing buffer pad; 44. Second shock-absorbing buffer pad;

[0057] 5. LED light strip;

[0058] 6. Freezer compartment; 61. Freezer interior door; 62. Freezer interior door handle. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0060] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, they can also apply the present application to other similar scenarios based on these drawings without any creative work.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, the terms "first" and "second" may explicitly or implicitly include one or more of the features.

[0062] Unless otherwise defined, technical or scientific terms used in this application shall have the ordinary meanings understood by persons of ordinary skill in the technical field to which this application belongs. The terms "a," "an," "an," and similar expressions used in this application do not indicate limitations on quantity and may refer to the singular or plural. The terms "include," "comprising," "having," and any variations thereof used in this application are intended to cover non-exclusive inclusions.

[0063] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0064] The technical solution of the present invention is described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0065] As attached Figure 1 -Attached Figure 6 As shown, in an illustrative embodiment of a damper device of the present invention, the damper device 3 is an air-proof device, which is installed on the top of any refrigeration or freezing equipment such as a refrigerator to prevent the cold air in the refrigeration or freezing equipment from leaking out.

[0066] The damper device 3 includes a housing 31 , a cross-flow fan 32 , a mechanical switch 33 and a damper duct 34 .

[0067] The shell 31 is installed on the top of the refrigerator body 1 in parallel with the width direction of the refrigerator body 1, and the front side thereof protrudes from the plane where the opening of the refrigerator body 1 is located.

[0068] The top of the housing 31 is provided with a raised portion that protrudes outward from the housing 31. The raised portion extends along the width of the refrigerator body 1, and its side projection forms at least one of a circular arc, an ellipse, a hyperbola, or a parabola. A fan housing cavity is formed within the raised portion for accommodating the crossflow fan 32. Multiple air inlets 311 are arranged on the raised portion, forming a three-dimensional, elongated arc-shaped air inlet at the top of the housing 31 that surrounds the crossflow fan 32 by at least 180 degrees.

[0069] The bottom of the shell 31 protrudes from the end of the plane where the opening of the refrigerator body 1 is located, and an air outlet 312 is vertically downward. The air outlet 312 is arranged in a strip shape and extends along the width direction of the refrigerator body 1.

[0070] The cross-flow fan 32 is arranged on one side of the shell 31 close to the air inlet 311, specifically in the fan accommodating cavity. The use of the cross-flow fan 32 can reasonably utilize the space in the air duct, is low-noise and quiet, and has uniform air output, making the overall structure of the damper device 3 simple, small in size, light in weight and portable.

[0071] The crossflow fan 32 includes a front air deflector, a rear air deflector, and a fan body. The front and rear air deflectors are located on the front and rear sides of the fan body, respectively. Together, the front and rear air deflectors, along with the raised portion, define a housing for the crossflow fan 32. The lower ends of the front and rear air deflectors are bent toward the air outlet to guide the airflow generated by the fan body. In this embodiment, the crossflow fan 32 is positioned in the same direction as the refrigerator. The front side of the crossflow fan 32 is located near the refrigerator door 2, while the rear side of the crossflow fan 32 is located away from the refrigerator door 2.

[0072] The mechanical switch 33 is mounted vertically downward at the bottom of the housing 31, protruding from the flat surface of the refrigerator's cabinet 1 opening. This fan-shaped switch is closed by default, connecting the circuit. When squeezed, it is disconnected, breaking the circuit. The mechanical switch 33 is electrically connected to the crossflow fan 32 and is used to control the activation and deactivation of the crossflow fan 32. It should be noted that the fan-shaped switch provided in this utility model is prior art, and its specific structure will not be further described in this utility model.

[0073] An upper air guide plate 35 and a lower air guide plate 36 are provided in the shell 31; the upper air guide plate 35 and the lower air guide plate 36 are both extended in the direction from the cross flow fan 32 to the air outlet 312; the lower air guide plate 36 is located on the lower side of the upper air guide plate 35, and defines an air outlet duct 34 between the lower air guide plate 36 and the upper air guide plate 35.

[0074] In this embodiment, the upper air guide plate 35 and the lower air guide plate 36 both include a first air guide section and a second air guide section.

[0075] The first air guide section of the upper air guide plate 35 and the first air guide section of the lower air guide plate 36 are connected to the front air guide plate and the rear air guide plate respectively.

[0076] The second air guide section of the upper air guide plate 35 and the second air guide section of the lower air guide plate 36 are respectively connected to the air outlet 312, and are both vertically arranged, jointly defining a vertical air door duct 34 to guide the air flow to blow vertically downward, forming a three-dimensional air door with uniform air flow at the opening of the box body 1.

[0077] The junction between the first and second air guide sections of the upper air guide plate 35 protrudes away from the lower air guide plate 36, forming an expansion cavity 341 in the air door duct 34 to guide the air flow to turn and better guide the air flow to blow vertically downward.

[0078] It should be noted that the overall structure of the damper device 3 is mostly made and assembled from sheet metal parts, which has a simple structure and is easy to process and install.

[0079] As an embodiment of the present invention, two cross flow fans 32 are arranged in the housing 31. Figure 3 -Attached Figure 4 As shown, two crossflow fans 32 are symmetrically arranged, with a wind baffle 37 disposed between the two crossflow fans 32. One end of the wind baffle 37 is located between the two crossflow fans 32, separating the two crossflow fans 32. The other end of the wind baffle 37 extends into the damper duct 34, dividing the damper duct 34 into two symmetrical and relatively independent sub-ducts, one for each crossflow fan 32. The provision of the wind baffle 37 ensures that the airflows of the two symmetrically arranged crossflow fans 32 do not interfere with each other, avoiding wasted air speed and reducing noise during the operation of the damper device 3.

[0080] In this embodiment, each cross-flow fan 32 is provided with two metal air guides 38 in the independent sub-duct, and each air guide 38 is arranged along the extension direction of the damper duct 34, further dividing the independent sub-duct corresponding to each cross-flow fan 32 into three relatively independent sub-ducts of unequal widths to balance the air flow distribution differences. The second partition plates in the two independent sub-ducts corresponding to the two cross-flow fans 32 are symmetrically arranged. After further division, the two cross-flow fans 32 have a total of six sub-ducts, as shown in the attached figure. Figure 4 As shown, they are air duct 1 to air duct 6 respectively.

[0081] In this embodiment, the widths of the six sub-air ducts gradually decrease from the two sides to the middle, the width of the air ducts close to the two sides of the damper device 3 is significantly larger than the width of the middle air duct, and the width of the sub-air duct with a motor on both sides is significantly larger than the width of the sub-air duct without a motor.

[0082] As another embodiment of the present invention, a cross flow fan 32 is provided in the housing 31, as shown in the attached Figure 5 -Attached Figure 6 As shown, in this embodiment, two air duct guides 38 are provided in the air door duct 34. The two air duct guides 38 are arranged along the extension direction of the air door duct 34, dividing the air door duct 34 as a whole into three symmetrical and independent sub-ducts, namely duct 1 to duct 3.

[0083] In this embodiment, the air guide members 38 in each air duct are also provided with a guide structure extending obliquely toward the air outlet 312 to guide the air flow coming out of the cross-flow fan 32 to ensure consistent wind speed at the air outlet 312.

[0084] In some embodiments of the present invention, the upper air guide plate 35 , the lower air guide plate 36 and the housing 31 are integrated into one structure to enhance the overall strength of the damper device.

[0085] In some embodiments of the present invention, as shown in the attached Figure 2 As shown, a blue LED light strip 5 is installed on the outside of the air outlet 312 along the extension direction of the air outlet 312. The LED light strip 5 is electrically connected to the mechanical switch 33 or the cross-flow fan 32, and is switched on and off synchronously with the cross-flow fan 32, that is, the LED light strip 5 is turned off when the cross-flow fan 32 is turned off, and the light strip is turned on when the cross-flow fan 32 is turned on. This makes the switch of the damper device 3 have a visual lighting effect, which is more conducive to the storage and access of samples, and can also interact with the ultra-low temperature refrigerator to more clearly display the range and direction of the three-dimensional damper.

[0086] Some embodiments of the present invention further provide a refrigerator, as shown in the attached Figure 7 -Attached Figure 12 As shown, the refrigerator is an ultra-low temperature refrigerator, comprising a box body 1, a box door 2 and a damper device 3.

[0087] Among them, an opening is provided on the front side of the box body 1, and a box door 2 is installed at the opening of the box body 1. The box door 2 can be rotatably installed on the box body 1 for opening and closing the opening on the front side of the box body 1. An external door handle 21 is installed on the box door 2 to open and close the box door 2.

[0088] The interior of the housing 1 defines multiple insulated freezer compartments 6 for storing high-value substances such as biological samples and medicines. The temperature within each freezer compartment 6 is typically set at -80°C or lower. Each freezer compartment 6 is surrounded by a freezer liner and has an opening at its front end. A freezer interior door 61 is installed at the opening of the freezer compartment 6 for opening and closing the freezer compartment 6. Each freezer interior door 61 is equipped with a freezer interior door handle 62 for opening and closing the freezer interior door 61.

[0089] The damper device 3 is an air-proof device, which is arranged on the top of the box body 1, close to the side of the opening. Figure 1 -Attached Figure 2 shown.

[0090] When the door 2 is closed, the mechanical switch 33 is in contact with the outer door of the refrigerator and is in an open state under the squeezing effect of the outer door of the refrigerator, the circuit is disconnected, and the cross flow fan 32 is turned off.

[0091] When the door 2 is opened, the squeezing effect of the refrigerator outer door on the mechanical switch 33 disappears, the mechanical switch 33 returns to the closed state, the circuit is connected, and the cross-flow fan 32 starts to operate. The cross-flow fan 32 draws air from the 180-degree three-dimensional long circular arc-shaped air inlet 311 at the top. The airflow generated by the cross-flow fan 32 enters the air door duct 34, is guided out through the air outlet 312, and blows vertically downward, forming a uniform three-dimensional air door at the opening of the refrigerator body 1, the position of the door 2 when the door 2 is closed. The airflow direction of the three-dimensional air door is shown in the attached figure. Figure 7 As shown by the arrow in the middle, the air flow direction in the damper device 3 is as shown in the attached Figure 1 Indicated by the arrow.

[0092] In the above-described exemplary embodiment, the damper device 3 is linked to the mechanical opening method of the refrigerator door 2 via a fan-shaped switch. That is, when the outer door is closed, the circuit is disconnected, and when the outer door is opened, the circuit is closed and connected. This effectively simplifies the control method of the damper device 3, allowing the fan to automatically open when the door 2 is opened to form a three-dimensional damper. This three-dimensional damper can effectively separate the air inside and outside the freezer compartment 6, avoiding the loss of cooling capacity in the freezer compartment 6, preventing outdoor water vapor from entering the freezer compartment 6 and forming condensation, thereby reducing temperature fluctuations in the freezer compartment 6. At the same time, it can also reduce the entry of dust and bacteria, ensuring the more stringent storage environment requirements for specific items. In addition, this three-dimensional damper can accelerate the melting and volatilization of frost on the outer wall of the freezer interior door 61, avoiding the need for regular manual defrosting, and reducing the maintenance cost of the refrigerator.

[0093] In some embodiments of the present invention, as shown in the attached Figure 9 -Attached Figure 12 As shown, a retractable fixed bracket 4 is provided between the damper device 3 and the box body 1. The damper device 3 is connected to the refrigerator box body 1 through the retractable fixed bracket 4 to form a stable structure. The retractable setting of the fixed bracket 4 enables it to be compatible with a variety of low-temperature refrigerator specifications and models, thereby expanding the scope of application of the damper device 3.

[0094] The fixing bracket 4 includes at least two L-shaped brackets 41 arranged opposite to each other. The L-shaped brackets 41 include a horizontal mounting plate and a vertical mounting plate that are perpendicular to each other. The horizontal mounting plates of the two L-shaped brackets 41 are each provided with a strip hole. The two L-shaped brackets 41 are retractably connected by screws passing through the strip holes. The vertical mounting plates of the two L-shaped brackets 41 are respectively clamped on the two sides of the box body 1 in the width direction and are tightened and fixed by round head bolts 42 that pass through the vertical mounting plates. The retractable fixing bracket 4 is shortened to its shortest length as shown in the attached figure. Figure 9 -Attached Figure 10 As shown, stretched to the maximum length as shown in the attached Figure 11 -Attached Figure 12 shown.

[0095] In this embodiment, the bottom surface of the horizontal mounting plate of the L-shaped support frame 41 is fitted with the top surface of the box body 1, and a first shock-absorbing buffer pad 43 with a single-sided adhesive is pasted on the bottom surface. The inner side surface of the vertical mounting plate of the L-shaped support frame 41 or the end of the round head bolt 42 is fitted with the outer side surface of the box body 1, and a second shock-absorbing buffer pad 44 with a single-sided adhesive is pasted at the fitting position to reduce noise and protect the appearance of the product.

[0096] When installing the fixing bracket 4, the user can adjust the appropriate installation distance according to the width of the box 1, and first install the fixing bracket 4 to the bottom of the damper device 3; then place the damper device 3 and the fixing bracket 4 together on the top outside the box 1, and clamp the bracket to the box 1 by tightening the cylindrical head screws on both sides.

[0097] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0098] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for which protection is requested in the present invention.

Claims

1. A damper device, characterized in that: include: A housing, wherein the top of the housing is provided with an air inlet, and the bottom of the housing is provided with an air outlet; A cross-flow fan is arranged inside the housing, on a side close to the air inlet; the cross-flow fan comprises a front air guide plate, a rear air guide plate and a fan body; the front air guide plate and the rear air guide plate are respectively arranged on the front and rear sides of the fan body; The upper air guide plate and the lower air guide plate are both arranged inside the shell, and the lower air guide plate is located on the lower side of the upper air guide plate, and defines an air outlet duct between the lower air guide plate and the upper air guide plate; The upper end portion of the upper air guide plate and the upper end portion of the lower air guide plate are respectively connected to the front air guide plate and the rear air guide plate, the lower end portion of the upper air guide plate and the lower end portion of the lower air guide plate are respectively connected to the air outlet, and the air door duct extends in the direction from the cross flow fan to the air outlet.

2. The damper device according to claim 1, characterized in that The cross-flow fans include two, which are arranged in an array in the housing; An air partition is provided between the two cross flow fans, one end of the air partition is located between the two cross flow fans for separating the two cross flow fans, and the other end extends into the air gate duct to separate the air gate duct into two symmetrical and relatively independent sub-air ducts.

3. The damper device according to claim 2, characterized in that A plurality of air guide members are arranged in the air door duct, and the plurality of air guide members are arranged along the extension direction of the air door duct to divide the air door duct into a plurality of relatively independent sub-air ducts.

4. The damper device according to claim 2 or 3, characterized in that: The widths of the multiple relatively independent sub-air ducts gradually decrease from both sides to the middle.

5. The damper device according to claim 1, wherein: The upper air guide plate and the lower air guide plate each include a first air guide section and a second air guide section; The first air guide section of the upper air guide plate and the first air guide section of the lower air guide plate are connected to the front air guide plate and the rear air guide plate respectively; The second air guide section of the upper air guide plate and the second air guide section of the lower air guide plate are respectively connected to the air outlet and are both vertically arranged to jointly define a vertical air door duct; The junction between the first air guide section and the second air guide section of the upper air guide plate protrudes in a direction away from the lower air guide plate, forming an expansion cavity in the air door duct.

6. The damper device according to claim 1, characterized in that An LED light strip is provided on the outside of the air outlet along the extension direction of the air outlet. The LED light strip is electrically connected to the cross flow fan and is switched on and off synchronously with the cross flow fan.

7. The damper device according to claim 1, wherein: The shell is provided with a raised portion protruding toward the outside of the shell, a fan accommodating chamber for accommodating a cross-flow fan is formed inside the raised portion, and the air inlet is provided on the raised portion.

8. A refrigerator, characterized in that: include: Box; An opening is provided on its front side; a box door, mounted on the box body, for opening and closing the opening; A damper device is installed on the top of the box body, close to the side of the opening, and the damper device is the damper device according to any one of claims 1 to 7.

9. The refrigerator according to claim 8, characterized in that Further including: The freezer compartment is arranged inside the box body and is surrounded by a freezer liner. A freezer interior door is installed on the front side of the freezer compartment for opening and closing the freezer compartment.

10. The refrigerator according to claim 8 or 9, characterized in that: further comprising a fixing bracket; The fixing bracket is arranged between the damper device and the box body, and includes two L-shaped support frames arranged opposite to each other, and the L-shaped support frames include a horizontal mounting plate and a vertical mounting plate perpendicular to each other; The vertical mounting plates of the two L-shaped support frames are respectively clamped on the two side surfaces in the width direction of the box body, and the horizontal mounting plates of the two L-shaped support frames are both provided with strip holes and are movably connected through the strip holes.

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