Air-cooled refrigerator

Abstract

The application provides a forced air cooling refrigerator, which comprises a refrigerator body, an evaporator, a fan, a first air door and a second air door. The refrigerator body defines a refrigeration chamber, a storage chamber, a refrigeration air duct, an air return channel and a defrosting air duct. The refrigeration chamber, the refrigeration air duct, the storage chamber and the air return channel are sequentially and circularly communicated to form a refrigeration circulating air path. The two ends of the defrosting air duct are respectively communicated with the refrigeration chamber to form a defrosting circulating air path. The evaporator is arranged in the refrigeration chamber, and the evaporator is located between the two ends of the defrosting air duct. The first air door is used for controlling the air driven by the fan to flow to the storage chamber and circulate in the refrigeration circulating air path. The second air door is used for controlling the air driven by the fan to flow through the defrosting air duct and circulate in the defrosting circulating air path. The forced air cooling refrigerator with the above structure improves the defrosting effect of the evaporator.

Description

Technical Field

[0001] This invention belongs to the field of refrigeration equipment technology, and specifically provides an air-cooled refrigerator. Background Technology

[0002] A frost-free refrigerator has a sequentially connected cooling compartment, cooling air duct, storage compartment, and return air duct. It also features an evaporator located within the cooling compartment to cool the air inside. The fan drives the air to circulate along the path of the cooling compartment, cooling air duct, storage compartment, and return air duct, transporting the air cooled by the evaporator from the cooling compartment to the storage compartment to cool the stored items (including food, medicine, beverages, biological reagents, bacteria colonies, chemical reagents, etc.).

[0003] Because the stored items in the storage room often include food with high moisture content, and moisture from the outside can also enter the storage room, the humidity is high. When this moisture cools at the evaporator, it forms frost that adheres to the evaporator. When there is a lot of frost on the evaporator, it will affect the evaporator's cooling effect on the surrounding air, so the evaporator needs to be defrosted regularly.

[0004] In existing technologies, the fan is usually stopped first, and then the evaporator is heated so that the heat is gradually distributed throughout the evaporator, thus melting the frost on it. This defrosting method is not only inefficient, but it also easily leads to hot air from the refrigeration compartment and / or refrigeration ducts entering the storage compartment, affecting the freezing, refrigeration, and preservation effects of the storage compartment. Summary of the Invention

[0005] One objective of this invention is to solve the problem of low defrosting efficiency in existing air-cooled refrigerators when defrosting the evaporator.

[0006] A further objective of this invention is to enable a frost-free refrigerator to promptly issue an alarm message when the air damper malfunctions.

[0007] To achieve the above objectives, the present invention provides a frost-cooled refrigerator, comprising:

[0008] The refrigerator body includes a cooling compartment, a storage compartment, a cooling air duct, a return air duct, and a defrost air duct. The cooling compartment, the cooling air duct, the storage compartment, and the return air duct are connected end to end in sequence to form a cooling circulation air path. The two ends of the defrost air duct are respectively connected to the cooling compartment to form a defrost circulation air path.

[0009] An evaporator is disposed in the refrigeration chamber and the evaporator is located between the two ends of the defrosting duct;

[0010] The system includes a fan, a first damper, and a second damper. The first damper controls the airflow driven by the fan to flow into the storage chamber and circulate within the refrigeration cycle air path. The second damper controls the airflow driven by the fan to flow through the defrost duct and circulate within the defrost cycle air path.

[0011] Optionally, when the fan-driven air circulates within the refrigeration cycle air path, the first damper is open and the second damper is closed; when the fan-driven air circulates within the defrost cycle air path, the first damper is closed and the second damper is open; before one of the first damper and the second damper moves from the fully open position to the fully closed position, the other damper is opened.

[0012] Optionally, the air-cooled refrigerator further includes a first sensor and a second sensor. The first sensor is disposed between the fully open position and the fully closed position of the first air damper, and the second sensor is disposed between the fully open position and the fully closed position of the second air damper. When the first air damper moves from the fully open position to the fully closed position, the second air damper is opened when the first sensor is triggered; when the second air damper moves from the fully open position to the fully closed position, the first air damper is opened when the second sensor is triggered.

[0013] Optionally, if the first sensor is not triggered when the first damper has moved from one of the fully closed position and the fully open position to the other position for a first preset time, the first damper is determined to be faulty, and the air-cooled refrigerator issues an alarm message; and / or, if the second sensor is not triggered when the second damper has moved from one of the fully closed position and the fully open position to the other position for a second preset time, the second damper is determined to be faulty, and the air-cooled refrigerator issues an alarm message.

[0014] Optionally, the air-cooled refrigerator further includes a linkage device for synchronizing the operation of the first air damper and the second air damper. The linkage device includes a spring, a cable, and a drive component. The spring is used to move the second air damper from a fully open position to a fully closed position and maintain it thereafter. The two ends of the cable are respectively connected to the first air damper and the second air damper so that when the second air damper is in a fully closed position, the first air damper is in a fully open position. The drive component is drivenly connected to the first air damper and is used to overcome the elastic force of the spring and move the first air damper from a fully open position to a fully closed position, and to move the second air damper from a fully closed position to a fully open position.

[0015] Optionally, the first damper is a rotary damper, and the second damper is a sliding damper.

[0016] Optionally, the rotational speed of the fan when the first damper is in the fully open position is not greater than the rotational speed of the fan when the second damper is in the fully open position.

[0017] Optionally, the first damper is located at the end of the refrigeration duct near the fan; and / or, the second damper is located at the end of the defrost duct away from the fan.

[0018] Optionally, the fan is positioned above the evaporator; and / or, the refrigerator body defines two cooling air ducts and one defrosting air duct, the defrosting air duct being located between the two cooling air ducts.

[0019] Optionally, the refrigerator body includes an air duct cover, and both the cooling air duct and the defrosting air duct are formed on the air duct cover; and / or, the air-cooled refrigerator further includes a heating device, which is disposed on the bottom side of the evaporator.

[0020] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this invention, by configuring a defrosting air duct with both ends connected to the cooling compartment, and positioning the two ends of the defrosting air duct on opposite sides of the evaporator, a defrosting circulation air path can be formed between the cooling compartment and the defrosting air duct. Under the action of the first and second air dampers, the air driven by the fan can circulate within the defrosting circulation air path. Therefore, when defrosting the evaporator, the air-cooled refrigerator of this invention can continuously blow air through the defrosting circulation air path, ensuring that all parts of the evaporator are heated evenly. Compared to the evaporator transferring heat to the entire body through its own heat transfer, the evaporator can be heated evenly and quickly, rapidly removing the frost on the evaporator, thereby improving the defrosting effect. Simultaneously, the flowing air also promotes the removal of the frost and frost water mixture from the evaporator, further enhancing the defrosting effect.

[0021] Furthermore, by moving one of the first and second dampers from the fully open position to the fully closed position before opening the other damper, the problem of air blockage when both dampers are closed is avoided, thus preventing the fan from being overloaded due to air blockage.

[0022] Furthermore, during the process of the first damper moving from the fully open position to the fully closed position, when the first sensor is triggered, the second damper is opened; during the process of the second damper moving from the fully open position to the fully closed position, when the first sensor is triggered, the first damper is opened; this ensures that either the first or second damper opens before the other damper is fully closed, avoiding the phenomenon of stuffy air when both dampers are closed.

[0023] Furthermore, if the first sensor is not triggered when the first damper moves from one of the fully closed and fully open positions to the other for a first preset time, the first damper is determined to be faulty, causing the air-cooled refrigerator to issue an alarm message; and if the second sensor is not triggered when the second damper moves from one of the fully closed and fully open positions to the other for a second preset time, the second damper is determined to be faulty, causing the air-cooled refrigerator to issue an alarm message, enabling the air-cooled refrigerator to automatically detect faults in the first and second dampers through the first and second sensors.

[0024] Furthermore, the linkage mechanism in frost-free refrigerators allows the first and second air dampers to operate synchronously, ensuring that when one damper opens, the other closes, preventing drafts caused by both dampers being closed. Moreover, the linkage mechanism allows both dampers to share a single drive unit, reducing the production cost of frost-free refrigerators.

[0025] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar parts or components in different drawings; the drawings of the present invention are not necessarily drawn to scale.

[0027] In the attached image:

[0028] Figure 1 This is a schematic diagram of the principle (cooling mode) of a frost-cooled refrigerator in some embodiments of the present invention;

[0029] Figure 2 This is a schematic diagram of the principle of a frost-free refrigerator in some embodiments of the present invention (defrosting mode);

[0030] Figure 3 This is a first isometric view of the duct cover portion in some embodiments of the present invention;

[0031] Figure 4This is a second isometric view of the duct cover portion in some embodiments of the present invention;

[0032] Figure 5 It is along Figure 4 A cross-sectional view along the AA direction;

[0033] Figure 6 This is a schematic diagram illustrating the corresponding effect of the damper and sensor in some embodiments of the present invention;

[0034] Figure 7 This is a schematic diagram illustrating the linkage effect of two dampers in other embodiments of the present invention. Detailed Implementation

[0035] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0036] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] The following reference Figures 1 to 6 The air-cooled refrigerator of the present invention will be described in detail below. Figure 1 This is a schematic diagram (cooling mode) of a frost-cooled refrigerator in some embodiments of the present invention. Figure 2 This is a schematic diagram of the principle of a frost-cooled refrigerator in some embodiments of the present invention (defrosting mode). Figure 3This is a first isometric view of the duct cover portion in some embodiments of the present invention. Figure 4 This is a second isometric view of the duct cover portion in some embodiments of the present invention. Figure 5 It is along Figure 4 Cross-sectional view along the AA direction. Figure 6 This is a schematic diagram illustrating the corresponding effect of the damper and sensor in some embodiments of the present invention.

[0039] It should be noted beforehand that, for ease of description and to enable those skilled in the art to quickly understand the technical solution of this invention, the following description only focuses on technical features that are strongly related (directly or indirectly related) to the technical problem and / or concept to be solved by this invention. Technical features that are less related to the technical problem and / or concept to be solved by this invention will not be described in detail. Since such less related technical features are common knowledge in the field, the omission of such less related features will not result in insufficient disclosure of this invention.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the air-cooled refrigerator includes a refrigerator body 1, an evaporator 2, a fan 3, a damper assembly 4, and a heating device 5.

[0041] Continue reading Figure 1 and Figure 2 The refrigerator body 1 includes a cooling compartment 101, a storage compartment 102, a cooling air duct 103, a return air duct 104, and a defrost air duct 105. The cooling compartment 101, cooling air duct 103, storage compartment 102, and return air duct 104 are sequentially connected end-to-end, thus forming a cooling circulation air path. The two ends of the defrost air duct 105 are connected to the cooling compartment 101, thus forming a defrost circulation air path.

[0042] like Figure 1 As shown, when the air-cooled refrigerator is running in cooling mode, the air circulates in the cooling cycle air path. The air flow path is: cooling chamber 101 → cooling air duct 103 → storage chamber 102 → return air duct 104 → cooling chamber 101.

[0043] like Figure 2 As shown, when the air-cooled refrigerator is running in defrost mode, the air circulates in the defrost circulation air duct. The air flow path is: refrigeration compartment 101 → defrost air duct 105 → refrigeration compartment 101.

[0044] Continue reading Figure 1 and Figure 2 The refrigerator body 1 includes an air duct cover 110, and a cooling air duct 103 and a defrosting air duct 105 are all formed on the air duct cover 110.

[0045] like Figures 1 to 5 As shown, the first air outlet 1031 of the refrigeration duct 103 is located on the front side of the duct cover 110, so that the refrigeration duct 103 blows cold air into the storage compartment 102 through the first air outlet 1031. The second air outlet 1051 of the defrost duct 105 is located on the rear side of the duct cover 110, so that the defrost duct 105 delivers the air inside to the refrigeration compartment 101 through the second air outlet 1051.

[0046] like Figure 5 As shown, in some embodiments of the present invention, there are two cooling air ducts 103 and one defrosting air duct 105, and the defrosting air duct 105 is located between the two cooling air ducts 103, so that the flow cross-sectional area of ​​the cooling air duct 103 is as large as possible, so as to reduce the air resistance of the cooling air duct 103.

[0047] like Figure 1 and Figure 2 As shown, the evaporator 2 is disposed within the refrigeration chamber 101 and positioned between the two ends of the defrosting duct 105, so that air flowing from the second air outlet 1051 flows towards the evaporator 2 to circulate it. A fan 3 is disposed above the evaporator 2 to drive airflow, allowing air to circulate within either the refrigeration cycle airflow path or the defrosting cycle airflow path. A damper assembly 4 selectively directs the air driven by the fan 3 towards either the storage chamber 102 or the defrosting duct 105, allowing air to circulate within either the refrigeration cycle airflow path or the defrosting cycle airflow path. A heating device 5 is disposed at the bottom of the evaporator 2 to heat it.

[0048] The fan 3 can be any feasible fan, such as a centrifugal fan, axial fan, or cross-flow fan. In some embodiments of the present invention, the fan 3 is preferably a centrifugal fan. Furthermore, those skilled in the art can also, as needed, position the fan 3 below the evaporator 2.

[0049] The heating device 5 is preferably an electric heating device. In addition, those skilled in the art can also configure the heating device 5 as any other feasible heating device as needed, such as a condenser installed on the bottom side of the evaporator 2, or use part or all of the evaporator 2 as a condenser during the defrosting process of the evaporator 2.

[0050] like Figure 1 and Figure 2 As shown, the damper assembly 4 includes a first damper 41 and a second damper 42 mounted on the duct cover 110. The first damper 41 is used to control whether airflow... Figure 1 As shown, the air circulates within the refrigeration cycle air path, and the second damper 42 is used to control whether the air is as described. Figure 2The air circulates within the defrost circulation duct as shown. Specifically, the open first damper 41 allows the air driven by the fan 3 to flow into the storage chamber 102 and circulate within the refrigeration circulation duct, while the closed first damper 41 prevents the air driven by the fan 3 from flowing into the storage chamber 102. The open second damper 42 allows the air driven by the fan 3 to flow through the defrost duct 105 and circulate within the defrost circulation duct, while the closed second damper 42 prevents the air driven by the fan 3 from flowing through the defrost duct 105.

[0051] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the first damper 41 is located at the end of the refrigeration duct 103 near the fan 3 to cut off the connection between the refrigeration duct 103 and the refrigeration chamber 101. The second damper 42 is located at the end of the defrost duct 15 away from the fan 3 to cut off the connection between the defrost duct 105 and the refrigeration chamber 101.

[0052] Furthermore, provided that the first damper 41 can prevent the airflow driven by the fan 3 from flowing into the storage chamber 102, the first damper 41 can also be set at any other location within the refrigeration duct 103.

[0053] Similarly, provided that the second damper 42 can prevent the airflow driven by the fan 3 from flowing through the defrosting duct 105, the second damper 42 can also be set at any other position in the defrosting duct 105, or at one end of the defrosting duct 105 near the fan 3.

[0054] like Figure 1 , Figure 2 and Figure 5 As shown, the top of the duct cover 110 also defines a connecting duct 106 corresponding to the fan 3. The cooling duct 103 and the defrosting duct 105 are respectively connected to the connecting duct 106. The air blown out from the fan 3 first enters the connecting duct 106 and then enters the cooling duct 103 and the defrosting duct 105. In other words, the air flowing into the cooling duct 103 and the defrosting duct 105 must flow through the connecting duct 106.

[0055] like Figure 5 As shown, the first damper 41 is preferably located at the junction of the cooling air duct 103 and the connecting air duct 106.

[0056] like Figure 4 and Figure 5 As shown, the first damper 41 is a pivot damper, and the second damper 42 is a sliding damper. Furthermore, those skilled in the art can, as needed, configure the first damper 41 and the second damper 42 as any other feasible damper, for example, configuring the first damper 41 as a sliding damper and the second damper 42 as a pivot damper.

[0057] Although not shown in the figures, in some embodiments of the present invention, the first damper 41 and the second damper 42 are each equipped with a drive motor to drive the first damper 41 and the second damper 42 to move. Of course, those skilled in the art can replace the drive motor with any other feasible drive device, such as an electromagnetic push rod, as needed.

[0058] like Figure 6 As shown, in some embodiments of the present invention, the air-cooled refrigerator further includes a first sensor 61 and a second sensor 62. The first sensor 61 is disposed between the fully open position and the fully closed position of the first air damper 41, and the second sensor 62 is disposed between the fully open position and the fully closed position of the second air damper 42.

[0059] The first sensor 61 and the second sensor 62 are used to detect the positions of the first damper 41 and the second damper 42, respectively. The first sensor 61 and the second sensor 62 can be any feasible sensor, such as a micro switch, an infrared sensor, a photoelectric sensor, etc.

[0060] The fully open position of the first air damper 41 is: Figure 6 The position indicated by the solid line box above the midpoint dashed line and on the left is the same as the position indicated by the solid line box above the midpoint dashed line. Figure 1 Corresponding to the attitude of the first air damper 41, the fully closed position of the first air damper 41 is: Figure 6 The position indicated by the dashed box above the midpoint on the right and aligns with... Figure 2 The posture of the first air damper 41 corresponds to that of the second air damper 42, which is in the fully open position. Figure 6 The position shown in the dashed box on the left below the midpoint and aligns with... Figure 2 Corresponding to the attitude of the second damper 42, the fully closed position of the second damper 42 is: Figure 6 The position shown in the solid line box to the right below the midpoint of the dashed line is aligned with... Figure 1 The posture of the second air door 42 in the middle corresponds to this.

[0061] Continue reading Figure 6 During the movement of the first damper 41 from one position (fully closed) to the other (fully open), the first damper 41 will trigger the first sensor 61. Similarly, during the movement of the second damper 42 from one position (fully closed) to the other (fully open), the second damper 42 will trigger the first sensor 62.

[0062] In some embodiments of the present invention, during the movement of the first damper 41 from the fully open position to the fully closed position, when the first sensor 61 is triggered, the second damper 42 is then opened. During the movement of the second damper 42 from the fully open position to the fully closed position, when the second sensor 62 is triggered, the first damper 41 is opened. By opening the other damper of the first damper 41 and the second damper 42 before one of them moves from the fully open position to the fully closed position, the problem of drafting when both dampers are closed is avoided, thus preventing the fan 3 from experiencing excessive load due to drafting.

[0063] Meanwhile, when one damper triggers its corresponding sensor, another damper is opened. Compared to directly issuing a closing command to one damper and an opening command to the other, this ensures that the damper executing the closing command is closed, and that the damper executing the opening command does not move at the same time as or before the damper executing the closing command moves.

[0064] Furthermore, if the first sensor 61 is not triggered when the first damper 41 moves from one position (fully closed) to the other (fully open) for a first preset time, it is determined that the first damper 41 has malfunctioned, causing the frost-free refrigerator to issue an alarm. Similarly, if the second sensor 62 is not triggered when the second damper 42 moves from one position (fully closed) to the other (fully open) for a second preset time, it is determined that the second damper 42 has malfunctioned, causing the frost-free refrigerator to issue an alarm. Therefore, the frost-free refrigerator can automatically detect malfunctions in the first damper 41 and the second damper 42 using the first sensor 61 and the second sensor 62, thus reminding the user to have the refrigerator inspected when malfunctions occur.

[0065] The first preset duration is the normal time for the first damper 41 to move from the fully closed position to the fully open position, and this data can be obtained by those skilled in the art through experiments. Alternatively, those skilled in the art can also make the first preset duration shorter than the normal duration as needed.

[0066] Similarly, the second preset duration is the normal time for the second damper 42 to move from the fully closed position to the fully open position, and this data can be obtained by those skilled in the art through experiments. Alternatively, those skilled in the art can also make the second preset duration shorter than this normal duration as needed.

[0067] The following reference Figure 1 , Figure 2 and Figure 6 The working principle of the air-cooled refrigerator in some embodiments of the present invention will be briefly explained.

[0068] like Figure 1 As shown, when the air-cooled refrigerator is running in cooling mode, the first air door 41 is open and the second air door 42 is closed. The fan 3 drives the air to circulate in the cooling cycle air path. The air flow path is: cooling chamber 101 → cooling air duct 103 → storage chamber 102 → return air duct 104 → cooling chamber 101.

[0069] like Figure 2 As shown, when the air-cooled refrigerator is running in defrost mode, the first air damper 41 is closed, the second air damper 42 is open, and the heating device 5 heats the evaporator 2. The fan 3 drives the air to circulate in the refrigeration cycle air duct, and the air flow path is: refrigeration chamber 101 → defrost air duct 105 → refrigeration chamber 101.

[0070] like Figure 1 , Figure 2 and Figure 6 As shown, when the frost-free refrigerator switches from cooling mode to defrost mode, the first air damper 41 closes. When the first sensor 61 is triggered, the second air damper 42 opens. When the frost-free refrigerator switches from defrost mode to cooling mode, the second air damper 42 closes. When the second sensor 62 is triggered, the first air damper 41 opens.

[0071] Preferably, the rotational speed of the fan 3 when the first damper 41 is fully open is not greater than the rotational speed of the fan 3 when the second damper 42 is fully open. That is, the rotational speed of the fan 3 in cooling mode is not greater than the rotational speed of the fan 3 in defrost mode. More preferably, the rotational speed of the fan 3 in defrost mode is 1-2 times the rotational speed of the fan 3 in cooling mode.

[0072] Based on the foregoing description, those skilled in the art will understand that, in some embodiments of the present invention, when defrosting the evaporator 2, the first damper 41 can be closed and the second damper 42 opened, allowing air to flow only between the refrigeration chamber 101 and the defrosting duct 105, without entering the storage chamber 102. This avoids temperature rise in the storage chamber 102 and ensures that the circulating air heats the evaporator 2 evenly, improving the defrosting efficiency of the evaporator 2. Simultaneously, it avoids airflow blockage when both dampers are closed simultaneously, thus preventing excessive load on the fan due to airflow blockage.

[0073] The following reference Figure 7 To illustrate some other embodiments of the invention. Figure 7 This is a schematic diagram illustrating the linkage effect of two dampers in other embodiments of the present invention.

[0074] like Figure 7As shown, in some other embodiments of the invention, unlike the embodiments described above, the first damper 41 and the second damper 42 can be operated synchronously by a driving device, that is, when one damper is opened, the other damper is closed synchronously.

[0075] like Figure 7 Preferably, the first air damper 41 is an air damper connected to the air duct cover 110, and the second air damper 42 is an air damper slidably connected to the air duct cover 110. The air-cooled refrigerator also includes a linkage device 7 that synchronizes the operation of the first air damper 41 and the second air damper 42.

[0076] Continue reading Figure 7 The linkage device 7 is installed on the air duct cover 110. The linkage device 7 includes a drive component 71, a cable 72, a spring 73, and a winding reel 74.

[0077] Continue reading Figure 7 The drive member 71 is drivenly connected to the winding reel 74 and the first damper 41. Optionally, the drive member 71 is a motor, and the drive shaft of the drive member 71 is coaxially and fixedly connected to the pivot shaft of the first damper 41 and the winding reel 74.

[0078] Continue reading Figure 7 The two ends of the cable 72 are connected to the first damper 41 and the second damper 42, respectively, so that when the second damper 42 is in the fully closed position, the first damper 41 is in the fully open position. Specifically, one end of the cable 72 is connected to the winding reel 74, thus allowing a portion of the cable 72 to be wound onto the winding reel 74; the other end of the cable 72 is connected to the second damper 42.

[0079] Continue reading Figure 7 One end of the spring 73 is connected to the second damper 42, and the other end of the spring 73 is connected to the duct cover 110. Preferably, the spring 73 is a tension spring located on the side of the second damper 42 away from the cable 72, and both ends of the spring 73 are hooked to the second damper 42 and the duct cover 110, respectively.

[0080] When the frost-free refrigerator is in cooling mode, the drive component 71 is de-energized, and under the action of the spring 73, the second damper 42 moves down and remains in the fully closed position (e.g., Figure 1 As shown). The first air door 41 moves to the fully open position under the action of the cable 72 (as shown). Figure 1 (As shown).

[0081] When the frost-free refrigerator is in defrost mode, the drive component 71 is energized, causing the winding reel 74 to overcome the tension of the spring 73, and causing the first damper 41 to rotate to the fully closed position (e.g., Figure 2 (As shown). Simultaneously, the second damper 42 is moved upwards to the fully open position (as shown). Figure 2 (As shown).

[0082] Therefore, in other embodiments of the present invention, the linkage device 7 enables the first damper 41 and the second damper 42 to operate synchronously, so that when one damper closes, the other damper opens, avoiding the problem of drafts when both dampers are closed. Furthermore, the linkage device 7 allows the two dampers to share a single motor, reducing the production cost of the air-cooled refrigerator.

[0083] Furthermore, those skilled in the art can also configure the drive component 71 as any other feasible component as needed. For example, the drive component 71 can be configured as an electromagnetic push rod, and the first damper 41 can be configured as a damper slidably connected to the duct cover 110. Then, the pull cable 72 can be directly bolted to the first damper 41 so that the electromagnetic push rod overcomes the tension of the spring 73, causing the first damper 41 to move to a fully closed position (e.g., ...). Figure 2 (As shown). Simultaneously, the second damper 42 is moved upwards to the fully open position (as shown). Figure 2 (As shown).

[0084] The technical solutions of the present invention have been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to related technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of the present invention will fall within the scope of protection of the present invention.

Claims

1.A wind-cooled refrigerator, comprising: a refrigerator body defining a refrigeration chamber, a storage chamber, a refrigeration air duct, an air return passage and a defrosting air duct, the refrigeration chamber, the refrigeration air duct, the storage chamber and the air return passage being sequentially and communicatively connected end to end to form a refrigeration circulating air path, and the defrosting air duct having two ends each being communicatively connected to the refrigeration chamber to form a defrosting circulating air path; an evaporator arranged in the refrigeration chamber and located between the two ends of the defrosting air duct; a fan, a first damper for controlling air flow driven by the fan to the storage chamber and circulating in the refrigeration circulating air path, and a second damper for controlling air flow driven by the fan through the defrosting air duct and circulating in the defrosting circulating air path; a first sensor arranged between a fully open position and a fully closed position of the first damper, the first sensor being triggered to open the second damper when the first damper moves from the fully open position to the fully closed position, and the first damper being determined to be faulty and the wind-cooled refrigerator being caused to issue an alarm if the first sensor is not triggered when the first damper moves from one of the fully open position and the fully closed position to the other position for a first preset time duration; and a second sensor arranged between a fully open position and a fully closed position of the second damper, the second sensor being triggered to open the first damper when the second damper moves from the fully open position to the fully closed position, and the second damper being determined to be faulty and the wind-cooled refrigerator being caused to issue an alarm if the second sensor is not triggered when the second damper moves from one of the fully open position and the fully closed position to the other position for a second preset time duration. 2.The wind-cooled refrigerator according to claim 1, wherein the first damper is a rotary damper and the second damper is a sliding damper. 3.The wind-cooled refrigerator according to claim 1 or 2, wherein a rotation speed of the fan when the first damper is in the fully open position is not greater than a rotation speed of the fan when the second damper is in the fully open position. 4.The wind-cooled refrigerator according to claim 1 or 2, wherein the first damper is arranged at an end of the refrigeration air duct close to the fan; and / or the second damper is arranged at an end of the defrosting air duct away from the fan. 5.The wind-cooled refrigerator according to claim 1 or 2, wherein the fan is arranged above the evaporator. 6.The wind-cooled refrigerator according to claim 1 or 2, wherein the refrigerator body defines two refrigeration air ducts and one defrosting air duct, and the defrosting air duct is located between the two refrigeration air ducts. 7.The wind-cooled refrigerator according to claim 3, wherein the refrigerator body comprises a duct cover plate, and the refrigeration air duct and the defrosting air duct are formed on the duct cover plate. 8.The wind-cooled refrigerator according to claim 3, wherein The air-cooled refrigerator further includes a heating device provided at a bottom side of the evaporator.

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